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ffmpeg/include/libavformat/version.h

@@ -0,0 +1,47 @@
+/*
+ * Version macros.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFORMAT_VERSION_H
+#define AVFORMAT_VERSION_H
+
+/**
+ * @file
+ * @ingroup libavf
+ * Libavformat version macros
+ */
+
+#include "libavutil/version.h"
+
+#include "version_major.h"
+
+#define LIBAVFORMAT_VERSION_MINOR   9
+#define LIBAVFORMAT_VERSION_MICRO 104
+
+#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
+                                               LIBAVFORMAT_VERSION_MINOR, \
+                                               LIBAVFORMAT_VERSION_MICRO)
+#define LIBAVFORMAT_VERSION     AV_VERSION(LIBAVFORMAT_VERSION_MAJOR,   \
+                                           LIBAVFORMAT_VERSION_MINOR,   \
+                                           LIBAVFORMAT_VERSION_MICRO)
+#define LIBAVFORMAT_BUILD       LIBAVFORMAT_VERSION_INT
+
+#define LIBAVFORMAT_IDENT       "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
+
+#endif /* AVFORMAT_VERSION_H */

ffmpeg/include/libavformat/version_major.h

@@ -0,0 +1,54 @@
+/*
+ * Version macros.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFORMAT_VERSION_MAJOR_H
+#define AVFORMAT_VERSION_MAJOR_H
+
+/**
+ * @file
+ * @ingroup libavf
+ * Libavformat version macros
+ */
+
+// Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
+// Also please add any ticket numbers that you believe might be affected here
+#define LIBAVFORMAT_VERSION_MAJOR  61
+
+/**
+ * FF_API_* defines may be placed below to indicate public API that will be
+ * dropped at a future version bump. The defines themselves are not part of
+ * the public API and may change, break or disappear at any time.
+ *
+ * @note, when bumping the major version it is recommended to manually
+ * disable each FF_API_* in its own commit instead of disabling them all
+ * at once through the bump. This improves the git bisect-ability of the change.
+ *
+ */
+#define FF_API_COMPUTE_PKT_FIELDS2      (LIBAVFORMAT_VERSION_MAJOR < 62)
+#define FF_API_LAVF_SHORTEST            (LIBAVFORMAT_VERSION_MAJOR < 62)
+#define FF_API_ALLOW_FLUSH              (LIBAVFORMAT_VERSION_MAJOR < 62)
+#define FF_API_AVSTREAM_SIDE_DATA       (LIBAVFORMAT_VERSION_MAJOR < 62)
+
+#define FF_API_GET_DUR_ESTIMATE_METHOD  (LIBAVFORMAT_VERSION_MAJOR < 62)
+#define FF_API_INTERNAL_TIMING          (LIBAVFORMAT_VERSION_MAJOR < 62)
+
+#define FF_API_R_FRAME_RATE            1
+
+#endif /* AVFORMAT_VERSION_MAJOR_H */

ffmpeg/include/libavutil/adler32.h

@@ -0,0 +1,63 @@
+/*
+ * copyright (c) 2006 Mans Rullgard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_adler32
+ * Public header for Adler-32 hash function implementation.
+ */
+
+#ifndef AVUTIL_ADLER32_H
+#define AVUTIL_ADLER32_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include "attributes.h"
+
+/**
+ * @defgroup lavu_adler32 Adler-32
+ * @ingroup lavu_hash
+ * Adler-32 hash function implementation.
+ *
+ * @{
+ */
+
+typedef uint32_t AVAdler;
+
+/**
+ * Calculate the Adler32 checksum of a buffer.
+ *
+ * Passing the return value to a subsequent av_adler32_update() call
+ * allows the checksum of multiple buffers to be calculated as though
+ * they were concatenated.
+ *
+ * @param adler initial checksum value
+ * @param buf   pointer to input buffer
+ * @param len   size of input buffer
+ * @return      updated checksum
+ */
+AVAdler av_adler32_update(AVAdler adler, const uint8_t *buf,
+                          size_t len) av_pure;
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_ADLER32_H */

ffmpeg/include/libavutil/aes.h

@@ -0,0 +1,69 @@
+/*
+ * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AES_H
+#define AVUTIL_AES_H
+
+#include <stdint.h>
+
+#include "attributes.h"
+
+/**
+ * @defgroup lavu_aes AES
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+extern const int av_aes_size;
+
+struct AVAES;
+
+/**
+ * Allocate an AVAES context.
+ */
+struct AVAES *av_aes_alloc(void);
+
+/**
+ * Initialize an AVAES context.
+ *
+ * @param a The AVAES context
+ * @param key Pointer to the key
+ * @param key_bits 128, 192 or 256
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
+
+/**
+ * Encrypt or decrypt a buffer using a previously initialized context.
+ *
+ * @param a The AVAES context
+ * @param dst destination array, can be equal to src
+ * @param src source array, can be equal to dst
+ * @param count number of 16 byte blocks
+ * @param iv initialization vector for CBC mode, if NULL then ECB will be used
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_AES_H */

ffmpeg/include/libavutil/aes_ctr.h

@@ -0,0 +1,99 @@
+/*
+ * AES-CTR cipher
+ * Copyright (c) 2015 Eran Kornblau <erankor at gmail dot com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AES_CTR_H
+#define AVUTIL_AES_CTR_H
+
+/**
+ * @defgroup lavu_aes_ctr AES-CTR
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+#include <stdint.h>
+
+#include "attributes.h"
+
+#define AES_CTR_KEY_SIZE (16)
+#define AES_CTR_IV_SIZE (8)
+
+struct AVAESCTR;
+
+/**
+ * Allocate an AVAESCTR context.
+ */
+struct AVAESCTR *av_aes_ctr_alloc(void);
+
+/**
+ * Initialize an AVAESCTR context.
+ *
+ * @param a The AVAESCTR context to initialize
+ * @param key encryption key, must have a length of AES_CTR_KEY_SIZE
+ */
+int av_aes_ctr_init(struct AVAESCTR *a, const uint8_t *key);
+
+/**
+ * Release an AVAESCTR context.
+ *
+ * @param a The AVAESCTR context
+ */
+void av_aes_ctr_free(struct AVAESCTR *a);
+
+/**
+ * Process a buffer using a previously initialized context.
+ *
+ * @param a The AVAESCTR context
+ * @param dst destination array, can be equal to src
+ * @param src source array, can be equal to dst
+ * @param size the size of src and dst
+ */
+void av_aes_ctr_crypt(struct AVAESCTR *a, uint8_t *dst, const uint8_t *src, int size);
+
+/**
+ * Get the current iv
+ */
+const uint8_t* av_aes_ctr_get_iv(struct AVAESCTR *a);
+
+/**
+ * Generate a random iv
+ */
+void av_aes_ctr_set_random_iv(struct AVAESCTR *a);
+
+/**
+ * Forcefully change the 8-byte iv
+ */
+void av_aes_ctr_set_iv(struct AVAESCTR *a, const uint8_t* iv);
+
+/**
+ * Forcefully change the "full" 16-byte iv, including the counter
+ */
+void av_aes_ctr_set_full_iv(struct AVAESCTR *a, const uint8_t* iv);
+
+/**
+ * Increment the top 64 bit of the iv (performed after each frame)
+ */
+void av_aes_ctr_increment_iv(struct AVAESCTR *a);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_AES_CTR_H */

ffmpeg/include/libavutil/ambient_viewing_environment.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2023 Jan Ekström <jeebjp@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H
+#define AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H
+
+#include <stddef.h>
+#include "frame.h"
+#include "rational.h"
+
+/**
+ * Ambient viewing environment metadata as defined by H.274. The values are
+ * saved in AVRationals so that they keep their exactness, while allowing for
+ * easy access to a double value with f.ex. av_q2d.
+ *
+ * @note sizeof(AVAmbientViewingEnvironment) is not part of the public ABI, and
+ *       it must be allocated using av_ambient_viewing_environment_alloc.
+ */
+typedef struct AVAmbientViewingEnvironment {
+    /**
+     * Environmental illuminance of the ambient viewing environment in lux.
+     */
+    AVRational ambient_illuminance;
+
+    /**
+     * Normalized x chromaticity coordinate of the environmental ambient light
+     * in the nominal viewing environment according to the CIE 1931 definition
+     * of x and y as specified in ISO/CIE 11664-1.
+     */
+    AVRational ambient_light_x;
+
+    /**
+     * Normalized y chromaticity coordinate of the environmental ambient light
+     * in the nominal viewing environment according to the CIE 1931 definition
+     * of x and y as specified in ISO/CIE 11664-1.
+     */
+    AVRational ambient_light_y;
+} AVAmbientViewingEnvironment;
+
+/**
+ * Allocate an AVAmbientViewingEnvironment structure.
+ *
+ * @return the newly allocated struct or NULL on failure
+ */
+AVAmbientViewingEnvironment *av_ambient_viewing_environment_alloc(size_t *size);
+
+/**
+ * Allocate and add an AVAmbientViewingEnvironment structure to an existing
+ * AVFrame as side data.
+ *
+ * @return the newly allocated struct, or NULL on failure
+ */
+AVAmbientViewingEnvironment *av_ambient_viewing_environment_create_side_data(AVFrame *frame);
+
+#endif /* AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H */

ffmpeg/include/libavutil/attributes.h

@@ -0,0 +1,173 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Macro definitions for various function/variable attributes
+ */
+
+#ifndef AVUTIL_ATTRIBUTES_H
+#define AVUTIL_ATTRIBUTES_H
+
+#ifdef __GNUC__
+#    define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > (x) || __GNUC__ == (x) && __GNUC_MINOR__ >= (y))
+#    define AV_GCC_VERSION_AT_MOST(x,y)  (__GNUC__ < (x) || __GNUC__ == (x) && __GNUC_MINOR__ <= (y))
+#else
+#    define AV_GCC_VERSION_AT_LEAST(x,y) 0
+#    define AV_GCC_VERSION_AT_MOST(x,y)  0
+#endif
+
+#ifdef __has_builtin
+#    define AV_HAS_BUILTIN(x) __has_builtin(x)
+#else
+#    define AV_HAS_BUILTIN(x) 0
+#endif
+
+#ifndef av_always_inline
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+#    define av_always_inline __attribute__((always_inline)) inline
+#elif defined(_MSC_VER)
+#    define av_always_inline __forceinline
+#else
+#    define av_always_inline inline
+#endif
+#endif
+
+#ifndef av_extern_inline
+#if defined(__ICL) && __ICL >= 1210 || defined(__GNUC_STDC_INLINE__)
+#    define av_extern_inline extern inline
+#else
+#    define av_extern_inline inline
+#endif
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,4)
+#    define av_warn_unused_result __attribute__((warn_unused_result))
+#else
+#    define av_warn_unused_result
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+#    define av_noinline __attribute__((noinline))
+#elif defined(_MSC_VER)
+#    define av_noinline __declspec(noinline)
+#else
+#    define av_noinline
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,1) || defined(__clang__)
+#    define av_pure __attribute__((pure))
+#else
+#    define av_pure
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(2,6) || defined(__clang__)
+#    define av_const __attribute__((const))
+#else
+#    define av_const
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(4,3) || defined(__clang__)
+#    define av_cold __attribute__((cold))
+#else
+#    define av_cold
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(4,1) && !defined(__llvm__)
+#    define av_flatten __attribute__((flatten))
+#else
+#    define av_flatten
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+#    define attribute_deprecated __attribute__((deprecated))
+#elif defined(_MSC_VER)
+#    define attribute_deprecated __declspec(deprecated)
+#else
+#    define attribute_deprecated
+#endif
+
+/**
+ * Disable warnings about deprecated features
+ * This is useful for sections of code kept for backward compatibility and
+ * scheduled for removal.
+ */
+#ifndef AV_NOWARN_DEPRECATED
+#if AV_GCC_VERSION_AT_LEAST(4,6) || defined(__clang__)
+#    define AV_NOWARN_DEPRECATED(code) \
+        _Pragma("GCC diagnostic push") \
+        _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") \
+        code \
+        _Pragma("GCC diagnostic pop")
+#elif defined(_MSC_VER)
+#    define AV_NOWARN_DEPRECATED(code) \
+        __pragma(warning(push)) \
+        __pragma(warning(disable : 4996)) \
+        code; \
+        __pragma(warning(pop))
+#else
+#    define AV_NOWARN_DEPRECATED(code) code
+#endif
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#    define av_unused __attribute__((unused))
+#else
+#    define av_unused
+#endif
+
+/**
+ * Mark a variable as used and prevent the compiler from optimizing it
+ * away.  This is useful for variables accessed only from inline
+ * assembler without the compiler being aware.
+ */
+#if AV_GCC_VERSION_AT_LEAST(3,1) || defined(__clang__)
+#    define av_used __attribute__((used))
+#else
+#    define av_used
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,3) || defined(__clang__)
+#   define av_alias __attribute__((may_alias))
+#else
+#   define av_alias
+#endif
+
+#if (defined(__GNUC__) || defined(__clang__)) && !defined(__INTEL_COMPILER)
+#    define av_uninit(x) x=x
+#else
+#    define av_uninit(x) x
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#    define av_builtin_constant_p __builtin_constant_p
+#    define av_printf_format(fmtpos, attrpos) __attribute__((__format__(__printf__, fmtpos, attrpos)))
+#else
+#    define av_builtin_constant_p(x) 0
+#    define av_printf_format(fmtpos, attrpos)
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(2,5) || defined(__clang__)
+#    define av_noreturn __attribute__((noreturn))
+#else
+#    define av_noreturn
+#endif
+
+#endif /* AVUTIL_ATTRIBUTES_H */

ffmpeg/include/libavutil/audio_fifo.h

@@ -0,0 +1,187 @@
+/*
+ * Audio FIFO
+ * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Audio FIFO Buffer
+ */
+
+#ifndef AVUTIL_AUDIO_FIFO_H
+#define AVUTIL_AUDIO_FIFO_H
+
+#include "attributes.h"
+#include "samplefmt.h"
+
+/**
+ * @addtogroup lavu_audio
+ * @{
+ *
+ * @defgroup lavu_audiofifo Audio FIFO Buffer
+ * @{
+ */
+
+/**
+ * Context for an Audio FIFO Buffer.
+ *
+ * - Operates at the sample level rather than the byte level.
+ * - Supports multiple channels with either planar or packed sample format.
+ * - Automatic reallocation when writing to a full buffer.
+ */
+typedef struct AVAudioFifo AVAudioFifo;
+
+/**
+ * Free an AVAudioFifo.
+ *
+ * @param af  AVAudioFifo to free
+ */
+void av_audio_fifo_free(AVAudioFifo *af);
+
+/**
+ * Allocate an AVAudioFifo.
+ *
+ * @param sample_fmt  sample format
+ * @param channels    number of channels
+ * @param nb_samples  initial allocation size, in samples
+ * @return            newly allocated AVAudioFifo, or NULL on error
+ */
+AVAudioFifo *av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels,
+                                 int nb_samples);
+
+/**
+ * Reallocate an AVAudioFifo.
+ *
+ * @param af          AVAudioFifo to reallocate
+ * @param nb_samples  new allocation size, in samples
+ * @return            0 if OK, or negative AVERROR code on failure
+ */
+av_warn_unused_result
+int av_audio_fifo_realloc(AVAudioFifo *af, int nb_samples);
+
+/**
+ * Write data to an AVAudioFifo.
+ *
+ * The AVAudioFifo will be reallocated automatically if the available space
+ * is less than nb_samples.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param af          AVAudioFifo to write to
+ * @param data        audio data plane pointers
+ * @param nb_samples  number of samples to write
+ * @return            number of samples actually written, or negative AVERROR
+ *                    code on failure. If successful, the number of samples
+ *                    actually written will always be nb_samples.
+ */
+int av_audio_fifo_write(AVAudioFifo *af, void * const *data, int nb_samples);
+
+/**
+ * Peek data from an AVAudioFifo.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param af          AVAudioFifo to read from
+ * @param data        audio data plane pointers
+ * @param nb_samples  number of samples to peek
+ * @return            number of samples actually peek, or negative AVERROR code
+ *                    on failure. The number of samples actually peek will not
+ *                    be greater than nb_samples, and will only be less than
+ *                    nb_samples if av_audio_fifo_size is less than nb_samples.
+ */
+int av_audio_fifo_peek(const AVAudioFifo *af, void * const *data, int nb_samples);
+
+/**
+ * Peek data from an AVAudioFifo.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param af          AVAudioFifo to read from
+ * @param data        audio data plane pointers
+ * @param nb_samples  number of samples to peek
+ * @param offset      offset from current read position
+ * @return            number of samples actually peek, or negative AVERROR code
+ *                    on failure. The number of samples actually peek will not
+ *                    be greater than nb_samples, and will only be less than
+ *                    nb_samples if av_audio_fifo_size is less than nb_samples.
+ */
+int av_audio_fifo_peek_at(const AVAudioFifo *af, void * const *data,
+                          int nb_samples, int offset);
+
+/**
+ * Read data from an AVAudioFifo.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param af          AVAudioFifo to read from
+ * @param data        audio data plane pointers
+ * @param nb_samples  number of samples to read
+ * @return            number of samples actually read, or negative AVERROR code
+ *                    on failure. The number of samples actually read will not
+ *                    be greater than nb_samples, and will only be less than
+ *                    nb_samples if av_audio_fifo_size is less than nb_samples.
+ */
+int av_audio_fifo_read(AVAudioFifo *af, void * const *data, int nb_samples);
+
+/**
+ * Drain data from an AVAudioFifo.
+ *
+ * Removes the data without reading it.
+ *
+ * @param af          AVAudioFifo to drain
+ * @param nb_samples  number of samples to drain
+ * @return            0 if OK, or negative AVERROR code on failure
+ */
+int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples);
+
+/**
+ * Reset the AVAudioFifo buffer.
+ *
+ * This empties all data in the buffer.
+ *
+ * @param af  AVAudioFifo to reset
+ */
+void av_audio_fifo_reset(AVAudioFifo *af);
+
+/**
+ * Get the current number of samples in the AVAudioFifo available for reading.
+ *
+ * @param af  the AVAudioFifo to query
+ * @return    number of samples available for reading
+ */
+int av_audio_fifo_size(AVAudioFifo *af);
+
+/**
+ * Get the current number of samples in the AVAudioFifo available for writing.
+ *
+ * @param af  the AVAudioFifo to query
+ * @return    number of samples available for writing
+ */
+int av_audio_fifo_space(AVAudioFifo *af);
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* AVUTIL_AUDIO_FIFO_H */

ffmpeg/include/libavutil/avassert.h

@@ -0,0 +1,78 @@
+/*
+ * copyright (c) 2010 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * simple assert() macros that are a bit more flexible than ISO C assert().
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#ifndef AVUTIL_AVASSERT_H
+#define AVUTIL_AVASSERT_H
+
+#include <stdlib.h>
+#ifdef HAVE_AV_CONFIG_H
+#   include "config.h"
+#endif
+#include "log.h"
+#include "macros.h"
+
+/**
+ * assert() equivalent, that is always enabled.
+ */
+#define av_assert0(cond) do {                                           \
+    if (!(cond)) {                                                      \
+        av_log(NULL, AV_LOG_PANIC, "Assertion %s failed at %s:%d\n",    \
+               AV_STRINGIFY(cond), __FILE__, __LINE__);                 \
+        abort();                                                        \
+    }                                                                   \
+} while (0)
+
+
+/**
+ * assert() equivalent, that does not lie in speed critical code.
+ * These asserts() thus can be enabled without fearing speed loss.
+ */
+#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 0
+#define av_assert1(cond) av_assert0(cond)
+#else
+#define av_assert1(cond) ((void)0)
+#endif
+
+
+/**
+ * assert() equivalent, that does lie in speed critical code.
+ */
+#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 1
+#define av_assert2(cond) av_assert0(cond)
+#define av_assert2_fpu() av_assert0_fpu()
+#else
+#define av_assert2(cond) ((void)0)
+#define av_assert2_fpu() ((void)0)
+#endif
+
+/**
+ * Assert that floating point operations can be executed.
+ *
+ * This will av_assert0() that the cpu is not in MMX state on X86
+ */
+void av_assert0_fpu(void);
+
+#endif /* AVUTIL_AVASSERT_H */

ffmpeg/include/libavutil/avconfig.h

@@ -0,0 +1,6 @@
+/* Generated by ffmpeg configure */
+#ifndef AVUTIL_AVCONFIG_H
+#define AVUTIL_AVCONFIG_H
+#define AV_HAVE_BIGENDIAN 0
+#define AV_HAVE_FAST_UNALIGNED 1
+#endif /* AVUTIL_AVCONFIG_H */

ffmpeg/include/libavutil/avstring.h

@@ -0,0 +1,428 @@
+/*
+ * Copyright (c) 2007 Mans Rullgard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AVSTRING_H
+#define AVUTIL_AVSTRING_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include "attributes.h"
+
+/**
+ * @addtogroup lavu_string
+ * @{
+ */
+
+/**
+ * Return non-zero if pfx is a prefix of str. If it is, *ptr is set to
+ * the address of the first character in str after the prefix.
+ *
+ * @param str input string
+ * @param pfx prefix to test
+ * @param ptr updated if the prefix is matched inside str
+ * @return non-zero if the prefix matches, zero otherwise
+ */
+int av_strstart(const char *str, const char *pfx, const char **ptr);
+
+/**
+ * Return non-zero if pfx is a prefix of str independent of case. If
+ * it is, *ptr is set to the address of the first character in str
+ * after the prefix.
+ *
+ * @param str input string
+ * @param pfx prefix to test
+ * @param ptr updated if the prefix is matched inside str
+ * @return non-zero if the prefix matches, zero otherwise
+ */
+int av_stristart(const char *str, const char *pfx, const char **ptr);
+
+/**
+ * Locate the first case-independent occurrence in the string haystack
+ * of the string needle.  A zero-length string needle is considered to
+ * match at the start of haystack.
+ *
+ * This function is a case-insensitive version of the standard strstr().
+ *
+ * @param haystack string to search in
+ * @param needle   string to search for
+ * @return         pointer to the located match within haystack
+ *                 or a null pointer if no match
+ */
+char *av_stristr(const char *haystack, const char *needle);
+
+/**
+ * Locate the first occurrence of the string needle in the string haystack
+ * where not more than hay_length characters are searched. A zero-length
+ * string needle is considered to match at the start of haystack.
+ *
+ * This function is a length-limited version of the standard strstr().
+ *
+ * @param haystack   string to search in
+ * @param needle     string to search for
+ * @param hay_length length of string to search in
+ * @return           pointer to the located match within haystack
+ *                   or a null pointer if no match
+ */
+char *av_strnstr(const char *haystack, const char *needle, size_t hay_length);
+
+/**
+ * Copy the string src to dst, but no more than size - 1 bytes, and
+ * null-terminate dst.
+ *
+ * This function is the same as BSD strlcpy().
+ *
+ * @param dst destination buffer
+ * @param src source string
+ * @param size size of destination buffer
+ * @return the length of src
+ *
+ * @warning since the return value is the length of src, src absolutely
+ * _must_ be a properly 0-terminated string, otherwise this will read beyond
+ * the end of the buffer and possibly crash.
+ */
+size_t av_strlcpy(char *dst, const char *src, size_t size);
+
+/**
+ * Append the string src to the string dst, but to a total length of
+ * no more than size - 1 bytes, and null-terminate dst.
+ *
+ * This function is similar to BSD strlcat(), but differs when
+ * size <= strlen(dst).
+ *
+ * @param dst destination buffer
+ * @param src source string
+ * @param size size of destination buffer
+ * @return the total length of src and dst
+ *
+ * @warning since the return value use the length of src and dst, these
+ * absolutely _must_ be a properly 0-terminated strings, otherwise this
+ * will read beyond the end of the buffer and possibly crash.
+ */
+size_t av_strlcat(char *dst, const char *src, size_t size);
+
+/**
+ * Append output to a string, according to a format. Never write out of
+ * the destination buffer, and always put a terminating 0 within
+ * the buffer.
+ * @param dst destination buffer (string to which the output is
+ *  appended)
+ * @param size total size of the destination buffer
+ * @param fmt printf-compatible format string, specifying how the
+ *  following parameters are used
+ * @return the length of the string that would have been generated
+ *  if enough space had been available
+ */
+size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) av_printf_format(3, 4);
+
+/**
+ * Get the count of continuous non zero chars starting from the beginning.
+ *
+ * @param s   the string whose length to count
+ * @param len maximum number of characters to check in the string, that
+ *            is the maximum value which is returned by the function
+ */
+static inline size_t av_strnlen(const char *s, size_t len)
+{
+    size_t i;
+    for (i = 0; i < len && s[i]; i++)
+        ;
+    return i;
+}
+
+/**
+ * Print arguments following specified format into a large enough auto
+ * allocated buffer. It is similar to GNU asprintf().
+ * @param fmt printf-compatible format string, specifying how the
+ *            following parameters are used.
+ * @return the allocated string
+ * @note You have to free the string yourself with av_free().
+ */
+char *av_asprintf(const char *fmt, ...) av_printf_format(1, 2);
+
+/**
+ * Unescape the given string until a non escaped terminating char,
+ * and return the token corresponding to the unescaped string.
+ *
+ * The normal \ and ' escaping is supported. Leading and trailing
+ * whitespaces are removed, unless they are escaped with '\' or are
+ * enclosed between ''.
+ *
+ * @param buf the buffer to parse, buf will be updated to point to the
+ * terminating char
+ * @param term a 0-terminated list of terminating chars
+ * @return the malloced unescaped string, which must be av_freed by
+ * the user, NULL in case of allocation failure
+ */
+char *av_get_token(const char **buf, const char *term);
+
+/**
+ * Split the string into several tokens which can be accessed by
+ * successive calls to av_strtok().
+ *
+ * A token is defined as a sequence of characters not belonging to the
+ * set specified in delim.
+ *
+ * On the first call to av_strtok(), s should point to the string to
+ * parse, and the value of saveptr is ignored. In subsequent calls, s
+ * should be NULL, and saveptr should be unchanged since the previous
+ * call.
+ *
+ * This function is similar to strtok_r() defined in POSIX.1.
+ *
+ * @param s the string to parse, may be NULL
+ * @param delim 0-terminated list of token delimiters, must be non-NULL
+ * @param saveptr user-provided pointer which points to stored
+ * information necessary for av_strtok() to continue scanning the same
+ * string. saveptr is updated to point to the next character after the
+ * first delimiter found, or to NULL if the string was terminated
+ * @return the found token, or NULL when no token is found
+ */
+char *av_strtok(char *s, const char *delim, char **saveptr);
+
+/**
+ * Locale-independent conversion of ASCII isdigit.
+ */
+static inline av_const int av_isdigit(int c)
+{
+    return c >= '0' && c <= '9';
+}
+
+/**
+ * Locale-independent conversion of ASCII isgraph.
+ */
+static inline av_const int av_isgraph(int c)
+{
+    return c > 32 && c < 127;
+}
+
+/**
+ * Locale-independent conversion of ASCII isspace.
+ */
+static inline av_const int av_isspace(int c)
+{
+    return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' ||
+           c == '\v';
+}
+
+/**
+ * Locale-independent conversion of ASCII characters to uppercase.
+ */
+static inline av_const int av_toupper(int c)
+{
+    if (c >= 'a' && c <= 'z')
+        c ^= 0x20;
+    return c;
+}
+
+/**
+ * Locale-independent conversion of ASCII characters to lowercase.
+ */
+static inline av_const int av_tolower(int c)
+{
+    if (c >= 'A' && c <= 'Z')
+        c ^= 0x20;
+    return c;
+}
+
+/**
+ * Locale-independent conversion of ASCII isxdigit.
+ */
+static inline av_const int av_isxdigit(int c)
+{
+    c = av_tolower(c);
+    return av_isdigit(c) || (c >= 'a' && c <= 'f');
+}
+
+/**
+ * Locale-independent case-insensitive compare.
+ * @note This means only ASCII-range characters are case-insensitive
+ */
+int av_strcasecmp(const char *a, const char *b);
+
+/**
+ * Locale-independent case-insensitive compare.
+ * @note This means only ASCII-range characters are case-insensitive
+ */
+int av_strncasecmp(const char *a, const char *b, size_t n);
+
+/**
+ * Locale-independent strings replace.
+ * @note This means only ASCII-range characters are replaced.
+ */
+char *av_strireplace(const char *str, const char *from, const char *to);
+
+/**
+ * Thread safe basename.
+ * @param path the string to parse, on DOS both \ and / are considered separators.
+ * @return pointer to the basename substring.
+ * If path does not contain a slash, the function returns a copy of path.
+ * If path is a NULL pointer or points to an empty string, a pointer
+ * to a string "." is returned.
+ */
+const char *av_basename(const char *path);
+
+/**
+ * Thread safe dirname.
+ * @param path the string to parse, on DOS both \ and / are considered separators.
+ * @return A pointer to a string that's the parent directory of path.
+ * If path is a NULL pointer or points to an empty string, a pointer
+ * to a string "." is returned.
+ * @note the function may modify the contents of the path, so copies should be passed.
+ */
+const char *av_dirname(char *path);
+
+/**
+ * Match instances of a name in a comma-separated list of names.
+ * List entries are checked from the start to the end of the names list,
+ * the first match ends further processing. If an entry prefixed with '-'
+ * matches, then 0 is returned. The "ALL" list entry is considered to
+ * match all names.
+ *
+ * @param name  Name to look for.
+ * @param names List of names.
+ * @return 1 on match, 0 otherwise.
+ */
+int av_match_name(const char *name, const char *names);
+
+/**
+ * Append path component to the existing path.
+ * Path separator '/' is placed between when needed.
+ * Resulting string have to be freed with av_free().
+ * @param path      base path
+ * @param component component to be appended
+ * @return new path or NULL on error.
+ */
+char *av_append_path_component(const char *path, const char *component);
+
+enum AVEscapeMode {
+    AV_ESCAPE_MODE_AUTO,      ///< Use auto-selected escaping mode.
+    AV_ESCAPE_MODE_BACKSLASH, ///< Use backslash escaping.
+    AV_ESCAPE_MODE_QUOTE,     ///< Use single-quote escaping.
+    AV_ESCAPE_MODE_XML,       ///< Use XML non-markup character data escaping.
+};
+
+/**
+ * Consider spaces special and escape them even in the middle of the
+ * string.
+ *
+ * This is equivalent to adding the whitespace characters to the special
+ * characters lists, except it is guaranteed to use the exact same list
+ * of whitespace characters as the rest of libavutil.
+ */
+#define AV_ESCAPE_FLAG_WHITESPACE (1 << 0)
+
+/**
+ * Escape only specified special characters.
+ * Without this flag, escape also any characters that may be considered
+ * special by av_get_token(), such as the single quote.
+ */
+#define AV_ESCAPE_FLAG_STRICT (1 << 1)
+
+/**
+ * Within AV_ESCAPE_MODE_XML, additionally escape single quotes for single
+ * quoted attributes.
+ */
+#define AV_ESCAPE_FLAG_XML_SINGLE_QUOTES (1 << 2)
+
+/**
+ * Within AV_ESCAPE_MODE_XML, additionally escape double quotes for double
+ * quoted attributes.
+ */
+#define AV_ESCAPE_FLAG_XML_DOUBLE_QUOTES (1 << 3)
+
+
+/**
+ * Escape string in src, and put the escaped string in an allocated
+ * string in *dst, which must be freed with av_free().
+ *
+ * @param dst           pointer where an allocated string is put
+ * @param src           string to escape, must be non-NULL
+ * @param special_chars string containing the special characters which
+ *                      need to be escaped, can be NULL
+ * @param mode          escape mode to employ, see AV_ESCAPE_MODE_* macros.
+ *                      Any unknown value for mode will be considered equivalent to
+ *                      AV_ESCAPE_MODE_BACKSLASH, but this behaviour can change without
+ *                      notice.
+ * @param flags         flags which control how to escape, see AV_ESCAPE_FLAG_ macros
+ * @return the length of the allocated string, or a negative error code in case of error
+ * @see av_bprint_escape()
+ */
+av_warn_unused_result
+int av_escape(char **dst, const char *src, const char *special_chars,
+              enum AVEscapeMode mode, int flags);
+
+#define AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES          1 ///< accept codepoints over 0x10FFFF
+#define AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS             2 ///< accept non-characters - 0xFFFE and 0xFFFF
+#define AV_UTF8_FLAG_ACCEPT_SURROGATES                 4 ///< accept UTF-16 surrogates codes
+#define AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES 8 ///< exclude control codes not accepted by XML
+
+#define AV_UTF8_FLAG_ACCEPT_ALL \
+    AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES|AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS|AV_UTF8_FLAG_ACCEPT_SURROGATES
+
+/**
+ * Read and decode a single UTF-8 code point (character) from the
+ * buffer in *buf, and update *buf to point to the next byte to
+ * decode.
+ *
+ * In case of an invalid byte sequence, the pointer will be updated to
+ * the next byte after the invalid sequence and the function will
+ * return an error code.
+ *
+ * Depending on the specified flags, the function will also fail in
+ * case the decoded code point does not belong to a valid range.
+ *
+ * @note For speed-relevant code a carefully implemented use of
+ * GET_UTF8() may be preferred.
+ *
+ * @param codep   pointer used to return the parsed code in case of success.
+ *                The value in *codep is set even in case the range check fails.
+ * @param bufp    pointer to the address the first byte of the sequence
+ *                to decode, updated by the function to point to the
+ *                byte next after the decoded sequence
+ * @param buf_end pointer to the end of the buffer, points to the next
+ *                byte past the last in the buffer. This is used to
+ *                avoid buffer overreads (in case of an unfinished
+ *                UTF-8 sequence towards the end of the buffer).
+ * @param flags   a collection of AV_UTF8_FLAG_* flags
+ * @return >= 0 in case a sequence was successfully read, a negative
+ * value in case of invalid sequence
+ */
+av_warn_unused_result
+int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
+                   unsigned int flags);
+
+/**
+ * Check if a name is in a list.
+ * @returns 0 if not found, or the 1 based index where it has been found in the
+ *            list.
+ */
+int av_match_list(const char *name, const char *list, char separator);
+
+/**
+ * See libc sscanf manual for more information.
+ * Locale-independent sscanf implementation.
+ */
+int av_sscanf(const char *string, const char *format, ...);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_AVSTRING_H */

ffmpeg/include/libavutil/avutil.h

@@ -0,0 +1,365 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AVUTIL_H
+#define AVUTIL_AVUTIL_H
+
+/**
+ * @file
+ * @ingroup lavu
+ * Convenience header that includes @ref lavu "libavutil"'s core.
+ */
+
+/**
+ * @mainpage
+ *
+ * @section ffmpeg_intro Introduction
+ *
+ * This document describes the usage of the different libraries
+ * provided by FFmpeg.
+ *
+ * @li @ref libavc "libavcodec" encoding/decoding library
+ * @li @ref lavfi "libavfilter" graph-based frame editing library
+ * @li @ref libavf "libavformat" I/O and muxing/demuxing library
+ * @li @ref lavd "libavdevice" special devices muxing/demuxing library
+ * @li @ref lavu "libavutil" common utility library
+ * @li @ref lswr "libswresample" audio resampling, format conversion and mixing
+ * @li @ref lpp  "libpostproc" post processing library
+ * @li @ref libsws "libswscale" color conversion and scaling library
+ *
+ * @section ffmpeg_versioning Versioning and compatibility
+ *
+ * Each of the FFmpeg libraries contains a version.h header, which defines a
+ * major, minor and micro version number with the
+ * <em>LIBRARYNAME_VERSION_{MAJOR,MINOR,MICRO}</em> macros. The major version
+ * number is incremented with backward incompatible changes - e.g. removing
+ * parts of the public API, reordering public struct members, etc. The minor
+ * version number is incremented for backward compatible API changes or major
+ * new features - e.g. adding a new public function or a new decoder. The micro
+ * version number is incremented for smaller changes that a calling program
+ * might still want to check for - e.g. changing behavior in a previously
+ * unspecified situation.
+ *
+ * FFmpeg guarantees backward API and ABI compatibility for each library as long
+ * as its major version number is unchanged. This means that no public symbols
+ * will be removed or renamed. Types and names of the public struct members and
+ * values of public macros and enums will remain the same (unless they were
+ * explicitly declared as not part of the public API). Documented behavior will
+ * not change.
+ *
+ * In other words, any correct program that works with a given FFmpeg snapshot
+ * should work just as well without any changes with any later snapshot with the
+ * same major versions. This applies to both rebuilding the program against new
+ * FFmpeg versions or to replacing the dynamic FFmpeg libraries that a program
+ * links against.
+ *
+ * However, new public symbols may be added and new members may be appended to
+ * public structs whose size is not part of public ABI (most public structs in
+ * FFmpeg). New macros and enum values may be added. Behavior in undocumented
+ * situations may change slightly (and be documented). All those are accompanied
+ * by an entry in doc/APIchanges and incrementing either the minor or micro
+ * version number.
+ */
+
+/**
+ * @defgroup lavu libavutil
+ * Common code shared across all FFmpeg libraries.
+ *
+ * @note
+ * libavutil is designed to be modular. In most cases, in order to use the
+ * functions provided by one component of libavutil you must explicitly include
+ * the specific header containing that feature. If you are only using
+ * media-related components, you could simply include libavutil/avutil.h, which
+ * brings in most of the "core" components.
+ *
+ * @{
+ *
+ * @defgroup lavu_crypto Crypto and Hashing
+ *
+ * @{
+ * @}
+ *
+ * @defgroup lavu_math Mathematics
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_string String Manipulation
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_mem Memory Management
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_data Data Structures
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_video Video related
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_audio Audio related
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_error Error Codes
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_log Logging Facility
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_misc Other
+ *
+ * @{
+ *
+ * @defgroup preproc_misc Preprocessor String Macros
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup version_utils Library Version Macros
+ *
+ * @{
+ *
+ * @}
+ */
+
+
+/**
+ * @addtogroup lavu_ver
+ * @{
+ */
+
+/**
+ * Return the LIBAVUTIL_VERSION_INT constant.
+ */
+unsigned avutil_version(void);
+
+/**
+ * Return an informative version string. This usually is the actual release
+ * version number or a git commit description. This string has no fixed format
+ * and can change any time. It should never be parsed by code.
+ */
+const char *av_version_info(void);
+
+/**
+ * Return the libavutil build-time configuration.
+ */
+const char *avutil_configuration(void);
+
+/**
+ * Return the libavutil license.
+ */
+const char *avutil_license(void);
+
+/**
+ * @}
+ */
+
+/**
+ * @addtogroup lavu_media Media Type
+ * @brief Media Type
+ */
+
+enum AVMediaType {
+    AVMEDIA_TYPE_UNKNOWN = -1,  ///< Usually treated as AVMEDIA_TYPE_DATA
+    AVMEDIA_TYPE_VIDEO,
+    AVMEDIA_TYPE_AUDIO,
+    AVMEDIA_TYPE_DATA,          ///< Opaque data information usually continuous
+    AVMEDIA_TYPE_SUBTITLE,
+    AVMEDIA_TYPE_ATTACHMENT,    ///< Opaque data information usually sparse
+    AVMEDIA_TYPE_NB
+};
+
+/**
+ * Return a string describing the media_type enum, NULL if media_type
+ * is unknown.
+ */
+const char *av_get_media_type_string(enum AVMediaType media_type);
+
+/**
+ * @defgroup lavu_const Constants
+ * @{
+ *
+ * @defgroup lavu_enc Encoding specific
+ *
+ * @note those definition should move to avcodec
+ * @{
+ */
+
+#define FF_LAMBDA_SHIFT 7
+#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
+#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
+#define FF_LAMBDA_MAX (256*128-1)
+
+#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
+
+/**
+ * @}
+ * @defgroup lavu_time Timestamp specific
+ *
+ * FFmpeg internal timebase and timestamp definitions
+ *
+ * @{
+ */
+
+/**
+ * @brief Undefined timestamp value
+ *
+ * Usually reported by demuxer that work on containers that do not provide
+ * either pts or dts.
+ */
+
+#define AV_NOPTS_VALUE          ((int64_t)UINT64_C(0x8000000000000000))
+
+/**
+ * Internal time base represented as integer
+ */
+
+#define AV_TIME_BASE            1000000
+
+/**
+ * Internal time base represented as fractional value
+ */
+
+#ifdef __cplusplus
+/* ISO C++ forbids compound-literals. */
+#define AV_TIME_BASE_Q          av_make_q(1, AV_TIME_BASE)
+#else
+#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
+#endif
+
+/**
+ * @}
+ * @}
+ * @defgroup lavu_picture Image related
+ *
+ * AVPicture types, pixel formats and basic image planes manipulation.
+ *
+ * @{
+ */
+
+enum AVPictureType {
+    AV_PICTURE_TYPE_NONE = 0, ///< Undefined
+    AV_PICTURE_TYPE_I,     ///< Intra
+    AV_PICTURE_TYPE_P,     ///< Predicted
+    AV_PICTURE_TYPE_B,     ///< Bi-dir predicted
+    AV_PICTURE_TYPE_S,     ///< S(GMC)-VOP MPEG-4
+    AV_PICTURE_TYPE_SI,    ///< Switching Intra
+    AV_PICTURE_TYPE_SP,    ///< Switching Predicted
+    AV_PICTURE_TYPE_BI,    ///< BI type
+};
+
+/**
+ * Return a single letter to describe the given picture type
+ * pict_type.
+ *
+ * @param[in] pict_type the picture type @return a single character
+ * representing the picture type, '?' if pict_type is unknown
+ */
+char av_get_picture_type_char(enum AVPictureType pict_type);
+
+/**
+ * @}
+ */
+
+#include "common.h"
+#include "rational.h"
+#include "version.h"
+#include "macros.h"
+#include "mathematics.h"
+#include "log.h"
+#include "pixfmt.h"
+
+/**
+ * Return x default pointer in case p is NULL.
+ */
+static inline void *av_x_if_null(const void *p, const void *x)
+{
+    return (void *)(intptr_t)(p ? p : x);
+}
+
+#if FF_API_OPT_INT_LIST
+/**
+ * Compute the length of an integer list.
+ *
+ * @param elsize  size in bytes of each list element (only 1, 2, 4 or 8)
+ * @param term    list terminator (usually 0 or -1)
+ * @param list    pointer to the list
+ * @return  length of the list, in elements, not counting the terminator
+ */
+attribute_deprecated
+unsigned av_int_list_length_for_size(unsigned elsize,
+                                     const void *list, uint64_t term) av_pure;
+
+/**
+ * Compute the length of an integer list.
+ *
+ * @param term  list terminator (usually 0 or -1)
+ * @param list  pointer to the list
+ * @return  length of the list, in elements, not counting the terminator
+ */
+#define av_int_list_length(list, term) \
+    av_int_list_length_for_size(sizeof(*(list)), list, term)
+#endif
+
+/**
+ * Return the fractional representation of the internal time base.
+ */
+AVRational av_get_time_base_q(void);
+
+#define AV_FOURCC_MAX_STRING_SIZE 32
+
+#define av_fourcc2str(fourcc) av_fourcc_make_string((char[AV_FOURCC_MAX_STRING_SIZE]){0}, fourcc)
+
+/**
+ * Fill the provided buffer with a string containing a FourCC (four-character
+ * code) representation.
+ *
+ * @param buf    a buffer with size in bytes of at least AV_FOURCC_MAX_STRING_SIZE
+ * @param fourcc the fourcc to represent
+ * @return the buffer in input
+ */
+char *av_fourcc_make_string(char *buf, uint32_t fourcc);
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* AVUTIL_AVUTIL_H */

ffmpeg/include/libavutil/base64.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_BASE64_H
+#define AVUTIL_BASE64_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_base64 Base64
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+/**
+ * Decode a base64-encoded string.
+ *
+ * @param out      buffer for decoded data
+ * @param in       null-terminated input string
+ * @param out_size size in bytes of the out buffer, must be at
+ *                 least 3/4 of the length of in, that is AV_BASE64_DECODE_SIZE(strlen(in))
+ * @return         number of bytes written, or a negative value in case of
+ *                 invalid input
+ */
+int av_base64_decode(uint8_t *out, const char *in, int out_size);
+
+/**
+ * Calculate the output size in bytes needed to decode a base64 string
+ * with length x to a data buffer.
+ */
+#define AV_BASE64_DECODE_SIZE(x) ((x) * 3LL / 4)
+
+/**
+ * Encode data to base64 and null-terminate.
+ *
+ * @param out      buffer for encoded data
+ * @param out_size size in bytes of the out buffer (including the
+ *                 null terminator), must be at least AV_BASE64_SIZE(in_size)
+ * @param in       input buffer containing the data to encode
+ * @param in_size  size in bytes of the in buffer
+ * @return         out or NULL in case of error
+ */
+char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size);
+
+/**
+ * Calculate the output size needed to base64-encode x bytes to a
+ * null-terminated string.
+ */
+#define AV_BASE64_SIZE(x)  (((x)+2) / 3 * 4 + 1)
+
+ /**
+  * @}
+  */
+
+#endif /* AVUTIL_BASE64_H */

ffmpeg/include/libavutil/blowfish.h

@@ -0,0 +1,82 @@
+/*
+ * Blowfish algorithm
+ * Copyright (c) 2012 Samuel Pitoiset
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_BLOWFISH_H
+#define AVUTIL_BLOWFISH_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_blowfish Blowfish
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+#define AV_BF_ROUNDS 16
+
+typedef struct AVBlowfish {
+    uint32_t p[AV_BF_ROUNDS + 2];
+    uint32_t s[4][256];
+} AVBlowfish;
+
+/**
+ * Allocate an AVBlowfish context.
+ */
+AVBlowfish *av_blowfish_alloc(void);
+
+/**
+ * Initialize an AVBlowfish context.
+ *
+ * @param ctx an AVBlowfish context
+ * @param key a key
+ * @param key_len length of the key
+ */
+void av_blowfish_init(struct AVBlowfish *ctx, const uint8_t *key, int key_len);
+
+/**
+ * Encrypt or decrypt a buffer using a previously initialized context.
+ *
+ * @param ctx an AVBlowfish context
+ * @param xl left four bytes halves of input to be encrypted
+ * @param xr right four bytes halves of input to be encrypted
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_blowfish_crypt_ecb(struct AVBlowfish *ctx, uint32_t *xl, uint32_t *xr,
+                           int decrypt);
+
+/**
+ * Encrypt or decrypt a buffer using a previously initialized context.
+ *
+ * @param ctx an AVBlowfish context
+ * @param dst destination array, can be equal to src
+ * @param src source array, can be equal to dst
+ * @param count number of 8 byte blocks
+ * @param iv initialization vector for CBC mode, if NULL ECB will be used
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_blowfish_crypt(struct AVBlowfish *ctx, uint8_t *dst, const uint8_t *src,
+                       int count, uint8_t *iv, int decrypt);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_BLOWFISH_H */

ffmpeg/include/libavutil/bprint.h

@@ -0,0 +1,254 @@
+/*
+ * Copyright (c) 2012 Nicolas George
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_avbprint
+ * AVBPrint public header
+ */
+
+#ifndef AVUTIL_BPRINT_H
+#define AVUTIL_BPRINT_H
+
+#include <stdarg.h>
+
+#include "attributes.h"
+#include "avstring.h"
+
+/**
+ * @defgroup lavu_avbprint AVBPrint
+ * @ingroup lavu_data
+ *
+ * A buffer to print data progressively
+ * @{
+ */
+
+/**
+ * Define a structure with extra padding to a fixed size
+ * This helps ensuring binary compatibility with future versions.
+ */
+
+#define FF_PAD_STRUCTURE(name, size, ...) \
+struct ff_pad_helper_##name { __VA_ARGS__ }; \
+typedef struct name { \
+    __VA_ARGS__ \
+    char reserved_padding[size - sizeof(struct ff_pad_helper_##name)]; \
+} name;
+
+/**
+ * Buffer to print data progressively
+ *
+ * The string buffer grows as necessary and is always 0-terminated.
+ * The content of the string is never accessed, and thus is
+ * encoding-agnostic and can even hold binary data.
+ *
+ * Small buffers are kept in the structure itself, and thus require no
+ * memory allocation at all (unless the contents of the buffer is needed
+ * after the structure goes out of scope). This is almost as lightweight as
+ * declaring a local `char buf[512]`.
+ *
+ * The length of the string can go beyond the allocated size: the buffer is
+ * then truncated, but the functions still keep account of the actual total
+ * length.
+ *
+ * In other words, AVBPrint.len can be greater than AVBPrint.size and records
+ * the total length of what would have been to the buffer if there had been
+ * enough memory.
+ *
+ * Append operations do not need to be tested for failure: if a memory
+ * allocation fails, data stop being appended to the buffer, but the length
+ * is still updated. This situation can be tested with
+ * av_bprint_is_complete().
+ *
+ * The AVBPrint.size_max field determines several possible behaviours:
+ * - `size_max = -1` (= `UINT_MAX`) or any large value will let the buffer be
+ *   reallocated as necessary, with an amortized linear cost.
+ * - `size_max = 0` prevents writing anything to the buffer: only the total
+ *   length is computed. The write operations can then possibly be repeated in
+ *   a buffer with exactly the necessary size
+ *   (using `size_init = size_max = len + 1`).
+ * - `size_max = 1` is automatically replaced by the exact size available in the
+ *   structure itself, thus ensuring no dynamic memory allocation. The
+ *   internal buffer is large enough to hold a reasonable paragraph of text,
+ *   such as the current paragraph.
+ */
+
+FF_PAD_STRUCTURE(AVBPrint, 1024,
+    char *str;         /**< string so far */
+    unsigned len;      /**< length so far */
+    unsigned size;     /**< allocated memory */
+    unsigned size_max; /**< maximum allocated memory */
+    char reserved_internal_buffer[1];
+)
+
+/**
+ * @name Max size special values
+ * Convenience macros for special values for av_bprint_init() size_max
+ * parameter.
+ * @{
+ */
+
+/**
+ * Buffer will be reallocated as necessary, with an amortized linear cost.
+ */
+#define AV_BPRINT_SIZE_UNLIMITED  ((unsigned)-1)
+/**
+ * Use the exact size available in the AVBPrint structure itself.
+ *
+ * Thus ensuring no dynamic memory allocation. The internal buffer is large
+ * enough to hold a reasonable paragraph of text, such as the current paragraph.
+ */
+#define AV_BPRINT_SIZE_AUTOMATIC  1
+/**
+ * Do not write anything to the buffer, only calculate the total length.
+ *
+ * The write operations can then possibly be repeated in a buffer with
+ * exactly the necessary size (using `size_init = size_max = AVBPrint.len + 1`).
+ */
+#define AV_BPRINT_SIZE_COUNT_ONLY 0
+/** @} */
+
+/**
+ * Init a print buffer.
+ *
+ * @param buf        buffer to init
+ * @param size_init  initial size (including the final 0)
+ * @param size_max   maximum size;
+ *                   - `0` means do not write anything, just count the length
+ *                   - `1` is replaced by the maximum value for automatic storage
+ *                       any large value means that the internal buffer will be
+ *                       reallocated as needed up to that limit
+ *                   - `-1` is converted to `UINT_MAX`, the largest limit possible.
+ *                   Check also `AV_BPRINT_SIZE_*` macros.
+ */
+void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max);
+
+/**
+ * Init a print buffer using a pre-existing buffer.
+ *
+ * The buffer will not be reallocated.
+ * In case size equals zero, the AVBPrint will be initialized to use
+ * the internal buffer as if using AV_BPRINT_SIZE_COUNT_ONLY with
+ * av_bprint_init().
+ *
+ * @param buf     buffer structure to init
+ * @param buffer  byte buffer to use for the string data
+ * @param size    size of buffer
+ */
+void av_bprint_init_for_buffer(AVBPrint *buf, char *buffer, unsigned size);
+
+/**
+ * Append a formatted string to a print buffer.
+ */
+void av_bprintf(AVBPrint *buf, const char *fmt, ...) av_printf_format(2, 3);
+
+/**
+ * Append a formatted string to a print buffer.
+ */
+void av_vbprintf(AVBPrint *buf, const char *fmt, va_list vl_arg);
+
+/**
+ * Append char c n times to a print buffer.
+ */
+void av_bprint_chars(AVBPrint *buf, char c, unsigned n);
+
+/**
+ * Append data to a print buffer.
+ *
+ * @param buf  bprint buffer to use
+ * @param data pointer to data
+ * @param size size of data
+ */
+void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size);
+
+struct tm;
+/**
+ * Append a formatted date and time to a print buffer.
+ *
+ * @param buf  bprint buffer to use
+ * @param fmt  date and time format string, see strftime()
+ * @param tm   broken-down time structure to translate
+ *
+ * @note due to poor design of the standard strftime function, it may
+ * produce poor results if the format string expands to a very long text and
+ * the bprint buffer is near the limit stated by the size_max option.
+ */
+void av_bprint_strftime(AVBPrint *buf, const char *fmt, const struct tm *tm);
+
+/**
+ * Allocate bytes in the buffer for external use.
+ *
+ * @param[in]  buf          buffer structure
+ * @param[in]  size         required size
+ * @param[out] mem          pointer to the memory area
+ * @param[out] actual_size  size of the memory area after allocation;
+ *                          can be larger or smaller than size
+ */
+void av_bprint_get_buffer(AVBPrint *buf, unsigned size,
+                          unsigned char **mem, unsigned *actual_size);
+
+/**
+ * Reset the string to "" but keep internal allocated data.
+ */
+void av_bprint_clear(AVBPrint *buf);
+
+/**
+ * Test if the print buffer is complete (not truncated).
+ *
+ * It may have been truncated due to a memory allocation failure
+ * or the size_max limit (compare size and size_max if necessary).
+ */
+static inline int av_bprint_is_complete(const AVBPrint *buf)
+{
+    return buf->len < buf->size;
+}
+
+/**
+ * Finalize a print buffer.
+ *
+ * The print buffer can no longer be used afterwards,
+ * but the len and size fields are still valid.
+ *
+ * @arg[out] ret_str  if not NULL, used to return a permanent copy of the
+ *                    buffer contents, or NULL if memory allocation fails;
+ *                    if NULL, the buffer is discarded and freed
+ * @return  0 for success or error code (probably AVERROR(ENOMEM))
+ */
+int av_bprint_finalize(AVBPrint *buf, char **ret_str);
+
+/**
+ * Escape the content in src and append it to dstbuf.
+ *
+ * @param dstbuf        already inited destination bprint buffer
+ * @param src           string containing the text to escape
+ * @param special_chars string containing the special characters which
+ *                      need to be escaped, can be NULL
+ * @param mode          escape mode to employ, see AV_ESCAPE_MODE_* macros.
+ *                      Any unknown value for mode will be considered equivalent to
+ *                      AV_ESCAPE_MODE_BACKSLASH, but this behaviour can change without
+ *                      notice.
+ * @param flags         flags which control how to escape, see AV_ESCAPE_FLAG_* macros
+ */
+void av_bprint_escape(AVBPrint *dstbuf, const char *src, const char *special_chars,
+                      enum AVEscapeMode mode, int flags);
+
+/** @} */
+
+#endif /* AVUTIL_BPRINT_H */

ffmpeg/include/libavutil/bswap.h

@@ -0,0 +1,105 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * byte swapping routines
+ */
+
+#ifndef AVUTIL_BSWAP_H
+#define AVUTIL_BSWAP_H
+
+#include <stdint.h>
+#include "libavutil/avconfig.h"
+#include "attributes.h"
+
+#ifdef HAVE_AV_CONFIG_H
+
+#include "config.h"
+
+#if ARCH_ARM
+#   include "arm/bswap.h"
+#elif ARCH_RISCV
+#   include "riscv/bswap.h"
+#elif ARCH_X86
+#   include "x86/bswap.h"
+#endif
+
+#endif /* HAVE_AV_CONFIG_H */
+
+#define AV_BSWAP16C(x) (((x) << 8 & 0xff00)  | ((x) >> 8 & 0x00ff))
+#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
+#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))
+
+#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
+
+#ifndef av_bswap16
+static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
+{
+    x= (x>>8) | (x<<8);
+    return x;
+}
+#endif
+
+#ifndef av_bswap32
+static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
+{
+    return AV_BSWAP32C(x);
+}
+#endif
+
+#ifndef av_bswap64
+static inline uint64_t av_const av_bswap64(uint64_t x)
+{
+    return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32);
+}
+#endif
+
+// be2ne ... big-endian to native-endian
+// le2ne ... little-endian to native-endian
+
+#if AV_HAVE_BIGENDIAN
+#define av_be2ne16(x) (x)
+#define av_be2ne32(x) (x)
+#define av_be2ne64(x) (x)
+#define av_le2ne16(x) av_bswap16(x)
+#define av_le2ne32(x) av_bswap32(x)
+#define av_le2ne64(x) av_bswap64(x)
+#define AV_BE2NEC(s, x) (x)
+#define AV_LE2NEC(s, x) AV_BSWAPC(s, x)
+#else
+#define av_be2ne16(x) av_bswap16(x)
+#define av_be2ne32(x) av_bswap32(x)
+#define av_be2ne64(x) av_bswap64(x)
+#define av_le2ne16(x) (x)
+#define av_le2ne32(x) (x)
+#define av_le2ne64(x) (x)
+#define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
+#define AV_LE2NEC(s, x) (x)
+#endif
+
+#define AV_BE2NE16C(x) AV_BE2NEC(16, x)
+#define AV_BE2NE32C(x) AV_BE2NEC(32, x)
+#define AV_BE2NE64C(x) AV_BE2NEC(64, x)
+#define AV_LE2NE16C(x) AV_LE2NEC(16, x)
+#define AV_LE2NE32C(x) AV_LE2NEC(32, x)
+#define AV_LE2NE64C(x) AV_LE2NEC(64, x)
+
+#endif /* AVUTIL_BSWAP_H */

ffmpeg/include/libavutil/buffer.h

@@ -0,0 +1,322 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_buffer
+ * refcounted data buffer API
+ */
+
+#ifndef AVUTIL_BUFFER_H
+#define AVUTIL_BUFFER_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_buffer AVBuffer
+ * @ingroup lavu_data
+ *
+ * @{
+ * AVBuffer is an API for reference-counted data buffers.
+ *
+ * There are two core objects in this API -- AVBuffer and AVBufferRef. AVBuffer
+ * represents the data buffer itself; it is opaque and not meant to be accessed
+ * by the caller directly, but only through AVBufferRef. However, the caller may
+ * e.g. compare two AVBuffer pointers to check whether two different references
+ * are describing the same data buffer. AVBufferRef represents a single
+ * reference to an AVBuffer and it is the object that may be manipulated by the
+ * caller directly.
+ *
+ * There are two functions provided for creating a new AVBuffer with a single
+ * reference -- av_buffer_alloc() to just allocate a new buffer, and
+ * av_buffer_create() to wrap an existing array in an AVBuffer. From an existing
+ * reference, additional references may be created with av_buffer_ref().
+ * Use av_buffer_unref() to free a reference (this will automatically free the
+ * data once all the references are freed).
+ *
+ * The convention throughout this API and the rest of FFmpeg is such that the
+ * buffer is considered writable if there exists only one reference to it (and
+ * it has not been marked as read-only). The av_buffer_is_writable() function is
+ * provided to check whether this is true and av_buffer_make_writable() will
+ * automatically create a new writable buffer when necessary.
+ * Of course nothing prevents the calling code from violating this convention,
+ * however that is safe only when all the existing references are under its
+ * control.
+ *
+ * @note Referencing and unreferencing the buffers is thread-safe and thus
+ * may be done from multiple threads simultaneously without any need for
+ * additional locking.
+ *
+ * @note Two different references to the same buffer can point to different
+ * parts of the buffer (i.e. their AVBufferRef.data will not be equal).
+ */
+
+/**
+ * A reference counted buffer type. It is opaque and is meant to be used through
+ * references (AVBufferRef).
+ */
+typedef struct AVBuffer AVBuffer;
+
+/**
+ * A reference to a data buffer.
+ *
+ * The size of this struct is not a part of the public ABI and it is not meant
+ * to be allocated directly.
+ */
+typedef struct AVBufferRef {
+    AVBuffer *buffer;
+
+    /**
+     * The data buffer. It is considered writable if and only if
+     * this is the only reference to the buffer, in which case
+     * av_buffer_is_writable() returns 1.
+     */
+    uint8_t *data;
+    /**
+     * Size of data in bytes.
+     */
+    size_t   size;
+} AVBufferRef;
+
+/**
+ * Allocate an AVBuffer of the given size using av_malloc().
+ *
+ * @return an AVBufferRef of given size or NULL when out of memory
+ */
+AVBufferRef *av_buffer_alloc(size_t size);
+
+/**
+ * Same as av_buffer_alloc(), except the returned buffer will be initialized
+ * to zero.
+ */
+AVBufferRef *av_buffer_allocz(size_t size);
+
+/**
+ * Always treat the buffer as read-only, even when it has only one
+ * reference.
+ */
+#define AV_BUFFER_FLAG_READONLY (1 << 0)
+
+/**
+ * Create an AVBuffer from an existing array.
+ *
+ * If this function is successful, data is owned by the AVBuffer. The caller may
+ * only access data through the returned AVBufferRef and references derived from
+ * it.
+ * If this function fails, data is left untouched.
+ * @param data   data array
+ * @param size   size of data in bytes
+ * @param free   a callback for freeing this buffer's data
+ * @param opaque parameter to be got for processing or passed to free
+ * @param flags  a combination of AV_BUFFER_FLAG_*
+ *
+ * @return an AVBufferRef referring to data on success, NULL on failure.
+ */
+AVBufferRef *av_buffer_create(uint8_t *data, size_t size,
+                              void (*free)(void *opaque, uint8_t *data),
+                              void *opaque, int flags);
+
+/**
+ * Default free callback, which calls av_free() on the buffer data.
+ * This function is meant to be passed to av_buffer_create(), not called
+ * directly.
+ */
+void av_buffer_default_free(void *opaque, uint8_t *data);
+
+/**
+ * Create a new reference to an AVBuffer.
+ *
+ * @return a new AVBufferRef referring to the same AVBuffer as buf or NULL on
+ * failure.
+ */
+AVBufferRef *av_buffer_ref(const AVBufferRef *buf);
+
+/**
+ * Free a given reference and automatically free the buffer if there are no more
+ * references to it.
+ *
+ * @param buf the reference to be freed. The pointer is set to NULL on return.
+ */
+void av_buffer_unref(AVBufferRef **buf);
+
+/**
+ * @return 1 if the caller may write to the data referred to by buf (which is
+ * true if and only if buf is the only reference to the underlying AVBuffer).
+ * Return 0 otherwise.
+ * A positive answer is valid until av_buffer_ref() is called on buf.
+ */
+int av_buffer_is_writable(const AVBufferRef *buf);
+
+/**
+ * @return the opaque parameter set by av_buffer_create.
+ */
+void *av_buffer_get_opaque(const AVBufferRef *buf);
+
+int av_buffer_get_ref_count(const AVBufferRef *buf);
+
+/**
+ * Create a writable reference from a given buffer reference, avoiding data copy
+ * if possible.
+ *
+ * @param buf buffer reference to make writable. On success, buf is either left
+ *            untouched, or it is unreferenced and a new writable AVBufferRef is
+ *            written in its place. On failure, buf is left untouched.
+ * @return 0 on success, a negative AVERROR on failure.
+ */
+int av_buffer_make_writable(AVBufferRef **buf);
+
+/**
+ * Reallocate a given buffer.
+ *
+ * @param buf  a buffer reference to reallocate. On success, buf will be
+ *             unreferenced and a new reference with the required size will be
+ *             written in its place. On failure buf will be left untouched. *buf
+ *             may be NULL, then a new buffer is allocated.
+ * @param size required new buffer size.
+ * @return 0 on success, a negative AVERROR on failure.
+ *
+ * @note the buffer is actually reallocated with av_realloc() only if it was
+ * initially allocated through av_buffer_realloc(NULL) and there is only one
+ * reference to it (i.e. the one passed to this function). In all other cases
+ * a new buffer is allocated and the data is copied.
+ */
+int av_buffer_realloc(AVBufferRef **buf, size_t size);
+
+/**
+ * Ensure dst refers to the same data as src.
+ *
+ * When *dst is already equivalent to src, do nothing. Otherwise unreference dst
+ * and replace it with a new reference to src.
+ *
+ * @param dst Pointer to either a valid buffer reference or NULL. On success,
+ *            this will point to a buffer reference equivalent to src. On
+ *            failure, dst will be left untouched.
+ * @param src A buffer reference to replace dst with. May be NULL, then this
+ *            function is equivalent to av_buffer_unref(dst).
+ * @return 0 on success
+ *         AVERROR(ENOMEM) on memory allocation failure.
+ */
+int av_buffer_replace(AVBufferRef **dst, const AVBufferRef *src);
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavu_bufferpool AVBufferPool
+ * @ingroup lavu_data
+ *
+ * @{
+ * AVBufferPool is an API for a lock-free thread-safe pool of AVBuffers.
+ *
+ * Frequently allocating and freeing large buffers may be slow. AVBufferPool is
+ * meant to solve this in cases when the caller needs a set of buffers of the
+ * same size (the most obvious use case being buffers for raw video or audio
+ * frames).
+ *
+ * At the beginning, the user must call av_buffer_pool_init() to create the
+ * buffer pool. Then whenever a buffer is needed, call av_buffer_pool_get() to
+ * get a reference to a new buffer, similar to av_buffer_alloc(). This new
+ * reference works in all aspects the same way as the one created by
+ * av_buffer_alloc(). However, when the last reference to this buffer is
+ * unreferenced, it is returned to the pool instead of being freed and will be
+ * reused for subsequent av_buffer_pool_get() calls.
+ *
+ * When the caller is done with the pool and no longer needs to allocate any new
+ * buffers, av_buffer_pool_uninit() must be called to mark the pool as freeable.
+ * Once all the buffers are released, it will automatically be freed.
+ *
+ * Allocating and releasing buffers with this API is thread-safe as long as
+ * either the default alloc callback is used, or the user-supplied one is
+ * thread-safe.
+ */
+
+/**
+ * The buffer pool. This structure is opaque and not meant to be accessed
+ * directly. It is allocated with av_buffer_pool_init() and freed with
+ * av_buffer_pool_uninit().
+ */
+typedef struct AVBufferPool AVBufferPool;
+
+/**
+ * Allocate and initialize a buffer pool.
+ *
+ * @param size size of each buffer in this pool
+ * @param alloc a function that will be used to allocate new buffers when the
+ * pool is empty. May be NULL, then the default allocator will be used
+ * (av_buffer_alloc()).
+ * @return newly created buffer pool on success, NULL on error.
+ */
+AVBufferPool *av_buffer_pool_init(size_t size, AVBufferRef* (*alloc)(size_t size));
+
+/**
+ * Allocate and initialize a buffer pool with a more complex allocator.
+ *
+ * @param size size of each buffer in this pool
+ * @param opaque arbitrary user data used by the allocator
+ * @param alloc a function that will be used to allocate new buffers when the
+ *              pool is empty. May be NULL, then the default allocator will be
+ *              used (av_buffer_alloc()).
+ * @param pool_free a function that will be called immediately before the pool
+ *                  is freed. I.e. after av_buffer_pool_uninit() is called
+ *                  by the caller and all the frames are returned to the pool
+ *                  and freed. It is intended to uninitialize the user opaque
+ *                  data. May be NULL.
+ * @return newly created buffer pool on success, NULL on error.
+ */
+AVBufferPool *av_buffer_pool_init2(size_t size, void *opaque,
+                                   AVBufferRef* (*alloc)(void *opaque, size_t size),
+                                   void (*pool_free)(void *opaque));
+
+/**
+ * Mark the pool as being available for freeing. It will actually be freed only
+ * once all the allocated buffers associated with the pool are released. Thus it
+ * is safe to call this function while some of the allocated buffers are still
+ * in use.
+ *
+ * @param pool pointer to the pool to be freed. It will be set to NULL.
+ */
+void av_buffer_pool_uninit(AVBufferPool **pool);
+
+/**
+ * Allocate a new AVBuffer, reusing an old buffer from the pool when available.
+ * This function may be called simultaneously from multiple threads.
+ *
+ * @return a reference to the new buffer on success, NULL on error.
+ */
+AVBufferRef *av_buffer_pool_get(AVBufferPool *pool);
+
+/**
+ * Query the original opaque parameter of an allocated buffer in the pool.
+ *
+ * @param ref a buffer reference to a buffer returned by av_buffer_pool_get.
+ * @return the opaque parameter set by the buffer allocator function of the
+ *         buffer pool.
+ *
+ * @note the opaque parameter of ref is used by the buffer pool implementation,
+ * therefore you have to use this function to access the original opaque
+ * parameter of an allocated buffer.
+ */
+void *av_buffer_pool_buffer_get_opaque(const AVBufferRef *ref);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_BUFFER_H */

ffmpeg/include/libavutil/camellia.h

@@ -0,0 +1,70 @@
+/*
+ * An implementation of the CAMELLIA algorithm as mentioned in RFC3713
+ * Copyright (c) 2014 Supraja Meedinti
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CAMELLIA_H
+#define AVUTIL_CAMELLIA_H
+
+#include <stdint.h>
+
+
+/**
+  * @file
+  * @brief Public header for libavutil CAMELLIA algorithm
+  * @defgroup lavu_camellia CAMELLIA
+  * @ingroup lavu_crypto
+  * @{
+  */
+
+extern const int av_camellia_size;
+
+struct AVCAMELLIA;
+
+/**
+  * Allocate an AVCAMELLIA context
+  * To free the struct: av_free(ptr)
+  */
+struct AVCAMELLIA *av_camellia_alloc(void);
+
+/**
+  * Initialize an AVCAMELLIA context.
+  *
+  * @param ctx an AVCAMELLIA context
+  * @param key a key of 16, 24, 32 bytes used for encryption/decryption
+  * @param key_bits number of keybits: possible are 128, 192, 256
+ */
+int av_camellia_init(struct AVCAMELLIA *ctx, const uint8_t *key, int key_bits);
+
+/**
+  * Encrypt or decrypt a buffer using a previously initialized context
+  *
+  * @param ctx an AVCAMELLIA context
+  * @param dst destination array, can be equal to src
+  * @param src source array, can be equal to dst
+  * @param count number of 16 byte blocks
+  * @param iv initialization vector for CBC mode, NULL for ECB mode
+  * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_camellia_crypt(struct AVCAMELLIA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t* iv, int decrypt);
+
+/**
+ * @}
+ */
+#endif /* AVUTIL_CAMELLIA_H */

ffmpeg/include/libavutil/cast5.h

@@ -0,0 +1,80 @@
+/*
+ * An implementation of the CAST128 algorithm as mentioned in RFC2144
+ * Copyright (c) 2014 Supraja Meedinti
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CAST5_H
+#define AVUTIL_CAST5_H
+
+#include <stdint.h>
+
+
+/**
+  * @file
+  * @brief Public header for libavutil CAST5 algorithm
+  * @defgroup lavu_cast5 CAST5
+  * @ingroup lavu_crypto
+  * @{
+  */
+
+extern const int av_cast5_size;
+
+struct AVCAST5;
+
+/**
+  * Allocate an AVCAST5 context
+  * To free the struct: av_free(ptr)
+  */
+struct AVCAST5 *av_cast5_alloc(void);
+/**
+  * Initialize an AVCAST5 context.
+  *
+  * @param ctx an AVCAST5 context
+  * @param key a key of 5,6,...16 bytes used for encryption/decryption
+  * @param key_bits number of keybits: possible are 40,48,...,128
+  * @return 0 on success, less than 0 on failure
+ */
+int av_cast5_init(struct AVCAST5 *ctx, const uint8_t *key, int key_bits);
+
+/**
+  * Encrypt or decrypt a buffer using a previously initialized context, ECB mode only
+  *
+  * @param ctx an AVCAST5 context
+  * @param dst destination array, can be equal to src
+  * @param src source array, can be equal to dst
+  * @param count number of 8 byte blocks
+  * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_cast5_crypt(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, int decrypt);
+
+/**
+  * Encrypt or decrypt a buffer using a previously initialized context
+  *
+  * @param ctx an AVCAST5 context
+  * @param dst destination array, can be equal to src
+  * @param src source array, can be equal to dst
+  * @param count number of 8 byte blocks
+  * @param iv initialization vector for CBC mode, NULL for ECB mode
+  * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_cast5_crypt2(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
+/**
+ * @}
+ */
+#endif /* AVUTIL_CAST5_H */

ffmpeg/include/libavutil/channel_layout.h

@@ -0,0 +1,762 @@
+/*
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2008 Peter Ross
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CHANNEL_LAYOUT_H
+#define AVUTIL_CHANNEL_LAYOUT_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "version.h"
+#include "attributes.h"
+
+/**
+ * @file
+ * @ingroup lavu_audio_channels
+ * Public libavutil channel layout APIs header.
+ */
+
+
+/**
+ * @defgroup lavu_audio_channels Audio channels
+ * @ingroup lavu_audio
+ *
+ * Audio channel layout utility functions
+ *
+ * @{
+ */
+
+enum AVChannel {
+    ///< Invalid channel index
+    AV_CHAN_NONE = -1,
+    AV_CHAN_FRONT_LEFT,
+    AV_CHAN_FRONT_RIGHT,
+    AV_CHAN_FRONT_CENTER,
+    AV_CHAN_LOW_FREQUENCY,
+    AV_CHAN_BACK_LEFT,
+    AV_CHAN_BACK_RIGHT,
+    AV_CHAN_FRONT_LEFT_OF_CENTER,
+    AV_CHAN_FRONT_RIGHT_OF_CENTER,
+    AV_CHAN_BACK_CENTER,
+    AV_CHAN_SIDE_LEFT,
+    AV_CHAN_SIDE_RIGHT,
+    AV_CHAN_TOP_CENTER,
+    AV_CHAN_TOP_FRONT_LEFT,
+    AV_CHAN_TOP_FRONT_CENTER,
+    AV_CHAN_TOP_FRONT_RIGHT,
+    AV_CHAN_TOP_BACK_LEFT,
+    AV_CHAN_TOP_BACK_CENTER,
+    AV_CHAN_TOP_BACK_RIGHT,
+    /** Stereo downmix. */
+    AV_CHAN_STEREO_LEFT = 29,
+    /** See above. */
+    AV_CHAN_STEREO_RIGHT,
+    AV_CHAN_WIDE_LEFT,
+    AV_CHAN_WIDE_RIGHT,
+    AV_CHAN_SURROUND_DIRECT_LEFT,
+    AV_CHAN_SURROUND_DIRECT_RIGHT,
+    AV_CHAN_LOW_FREQUENCY_2,
+    AV_CHAN_TOP_SIDE_LEFT,
+    AV_CHAN_TOP_SIDE_RIGHT,
+    AV_CHAN_BOTTOM_FRONT_CENTER,
+    AV_CHAN_BOTTOM_FRONT_LEFT,
+    AV_CHAN_BOTTOM_FRONT_RIGHT,
+    AV_CHAN_SIDE_SURROUND_LEFT,     ///<  +90 degrees, Lss, SiL
+    AV_CHAN_SIDE_SURROUND_RIGHT,    ///<  -90 degrees, Rss, SiR
+    AV_CHAN_TOP_SURROUND_LEFT,      ///< +110 degrees, Lvs, TpLS
+    AV_CHAN_TOP_SURROUND_RIGHT,     ///< -110 degrees, Rvs, TpRS
+
+    AV_CHAN_BINAURAL_LEFT = 61,
+    AV_CHAN_BINAURAL_RIGHT,
+
+    /** Channel is empty can be safely skipped. */
+    AV_CHAN_UNUSED = 0x200,
+
+    /** Channel contains data, but its position is unknown. */
+    AV_CHAN_UNKNOWN = 0x300,
+
+    /**
+     * Range of channels between AV_CHAN_AMBISONIC_BASE and
+     * AV_CHAN_AMBISONIC_END represent Ambisonic components using the ACN system.
+     *
+     * Given a channel id `<i>` between AV_CHAN_AMBISONIC_BASE and
+     * AV_CHAN_AMBISONIC_END (inclusive), the ACN index of the channel `<n>` is
+     * `<n> = <i> - AV_CHAN_AMBISONIC_BASE`.
+     *
+     * @note these values are only used for AV_CHANNEL_ORDER_CUSTOM channel
+     * orderings, the AV_CHANNEL_ORDER_AMBISONIC ordering orders the channels
+     * implicitly by their position in the stream.
+     */
+    AV_CHAN_AMBISONIC_BASE = 0x400,
+    // leave space for 1024 ids, which correspond to maximum order-32 harmonics,
+    // which should be enough for the foreseeable use cases
+    AV_CHAN_AMBISONIC_END  = 0x7ff,
+};
+
+enum AVChannelOrder {
+    /**
+     * Only the channel count is specified, without any further information
+     * about the channel order.
+     */
+    AV_CHANNEL_ORDER_UNSPEC,
+    /**
+     * The native channel order, i.e. the channels are in the same order in
+     * which they are defined in the AVChannel enum. This supports up to 63
+     * different channels.
+     */
+    AV_CHANNEL_ORDER_NATIVE,
+    /**
+     * The channel order does not correspond to any other predefined order and
+     * is stored as an explicit map. For example, this could be used to support
+     * layouts with 64 or more channels, or with empty/skipped (AV_CHAN_UNUSED)
+     * channels at arbitrary positions.
+     */
+    AV_CHANNEL_ORDER_CUSTOM,
+    /**
+     * The audio is represented as the decomposition of the sound field into
+     * spherical harmonics. Each channel corresponds to a single expansion
+     * component. Channels are ordered according to ACN (Ambisonic Channel
+     * Number).
+     *
+     * The channel with the index n in the stream contains the spherical
+     * harmonic of degree l and order m given by
+     * @code{.unparsed}
+     *   l   = floor(sqrt(n)),
+     *   m   = n - l * (l + 1).
+     * @endcode
+     *
+     * Conversely given a spherical harmonic of degree l and order m, the
+     * corresponding channel index n is given by
+     * @code{.unparsed}
+     *   n = l * (l + 1) + m.
+     * @endcode
+     *
+     * Normalization is assumed to be SN3D (Schmidt Semi-Normalization)
+     * as defined in AmbiX format $ 2.1.
+     */
+    AV_CHANNEL_ORDER_AMBISONIC,
+    /**
+     * Number of channel orders, not part of ABI/API
+     */
+    FF_CHANNEL_ORDER_NB
+};
+
+
+/**
+ * @defgroup channel_masks Audio channel masks
+ *
+ * A channel layout is a 64-bits integer with a bit set for every channel.
+ * The number of bits set must be equal to the number of channels.
+ * The value 0 means that the channel layout is not known.
+ * @note this data structure is not powerful enough to handle channels
+ * combinations that have the same channel multiple times, such as
+ * dual-mono.
+ *
+ * @{
+ */
+#define AV_CH_FRONT_LEFT             (1ULL << AV_CHAN_FRONT_LEFT           )
+#define AV_CH_FRONT_RIGHT            (1ULL << AV_CHAN_FRONT_RIGHT          )
+#define AV_CH_FRONT_CENTER           (1ULL << AV_CHAN_FRONT_CENTER         )
+#define AV_CH_LOW_FREQUENCY          (1ULL << AV_CHAN_LOW_FREQUENCY        )
+#define AV_CH_BACK_LEFT              (1ULL << AV_CHAN_BACK_LEFT            )
+#define AV_CH_BACK_RIGHT             (1ULL << AV_CHAN_BACK_RIGHT           )
+#define AV_CH_FRONT_LEFT_OF_CENTER   (1ULL << AV_CHAN_FRONT_LEFT_OF_CENTER )
+#define AV_CH_FRONT_RIGHT_OF_CENTER  (1ULL << AV_CHAN_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_BACK_CENTER            (1ULL << AV_CHAN_BACK_CENTER          )
+#define AV_CH_SIDE_LEFT              (1ULL << AV_CHAN_SIDE_LEFT            )
+#define AV_CH_SIDE_RIGHT             (1ULL << AV_CHAN_SIDE_RIGHT           )
+#define AV_CH_TOP_CENTER             (1ULL << AV_CHAN_TOP_CENTER           )
+#define AV_CH_TOP_FRONT_LEFT         (1ULL << AV_CHAN_TOP_FRONT_LEFT       )
+#define AV_CH_TOP_FRONT_CENTER       (1ULL << AV_CHAN_TOP_FRONT_CENTER     )
+#define AV_CH_TOP_FRONT_RIGHT        (1ULL << AV_CHAN_TOP_FRONT_RIGHT      )
+#define AV_CH_TOP_BACK_LEFT          (1ULL << AV_CHAN_TOP_BACK_LEFT        )
+#define AV_CH_TOP_BACK_CENTER        (1ULL << AV_CHAN_TOP_BACK_CENTER      )
+#define AV_CH_TOP_BACK_RIGHT         (1ULL << AV_CHAN_TOP_BACK_RIGHT       )
+#define AV_CH_STEREO_LEFT            (1ULL << AV_CHAN_STEREO_LEFT          )
+#define AV_CH_STEREO_RIGHT           (1ULL << AV_CHAN_STEREO_RIGHT         )
+#define AV_CH_WIDE_LEFT              (1ULL << AV_CHAN_WIDE_LEFT            )
+#define AV_CH_WIDE_RIGHT             (1ULL << AV_CHAN_WIDE_RIGHT           )
+#define AV_CH_SURROUND_DIRECT_LEFT   (1ULL << AV_CHAN_SURROUND_DIRECT_LEFT )
+#define AV_CH_SURROUND_DIRECT_RIGHT  (1ULL << AV_CHAN_SURROUND_DIRECT_RIGHT)
+#define AV_CH_LOW_FREQUENCY_2        (1ULL << AV_CHAN_LOW_FREQUENCY_2      )
+#define AV_CH_TOP_SIDE_LEFT          (1ULL << AV_CHAN_TOP_SIDE_LEFT        )
+#define AV_CH_TOP_SIDE_RIGHT         (1ULL << AV_CHAN_TOP_SIDE_RIGHT       )
+#define AV_CH_BOTTOM_FRONT_CENTER    (1ULL << AV_CHAN_BOTTOM_FRONT_CENTER  )
+#define AV_CH_BOTTOM_FRONT_LEFT      (1ULL << AV_CHAN_BOTTOM_FRONT_LEFT    )
+#define AV_CH_BOTTOM_FRONT_RIGHT     (1ULL << AV_CHAN_BOTTOM_FRONT_RIGHT   )
+#define AV_CH_SIDE_SURROUND_LEFT     (1ULL << AV_CHAN_SIDE_SURROUND_LEFT   )
+#define AV_CH_SIDE_SURROUND_RIGHT    (1ULL << AV_CHAN_SIDE_SURROUND_RIGHT  )
+#define AV_CH_TOP_SURROUND_LEFT      (1ULL << AV_CHAN_TOP_SURROUND_LEFT    )
+#define AV_CH_TOP_SURROUND_RIGHT     (1ULL << AV_CHAN_TOP_SURROUND_RIGHT   )
+#define AV_CH_BINAURAL_LEFT          (1ULL << AV_CHAN_BINAURAL_LEFT        )
+#define AV_CH_BINAURAL_RIGHT         (1ULL << AV_CHAN_BINAURAL_RIGHT       )
+
+/**
+ * @}
+ * @defgroup channel_mask_c Audio channel layouts
+ * @{
+ * */
+#define AV_CH_LAYOUT_MONO              (AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_STEREO            (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)
+#define AV_CH_LAYOUT_2POINT1           (AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_2_1               (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_SURROUND          (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_3POINT1           (AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_4POINT0           (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_4POINT1           (AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_2_2               (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_QUAD              (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT0           (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_5POINT1           (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_5POINT0_BACK      (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT1_BACK      (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_6POINT0           (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT0_FRONT     (AV_CH_LAYOUT_2_2|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_HEXAGONAL         (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_3POINT1POINT2     (AV_CH_LAYOUT_3POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_6POINT1           (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT1_BACK      (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT1_FRONT     (AV_CH_LAYOUT_6POINT0_FRONT|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_7POINT0           (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT0_FRONT     (AV_CH_LAYOUT_5POINT0|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_7POINT1           (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT1_WIDE      (AV_CH_LAYOUT_5POINT1|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_7POINT1_WIDE_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_5POINT1POINT2     (AV_CH_LAYOUT_5POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_5POINT1POINT2_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_OCTAGONAL         (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_CENTER|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_CUBE              (AV_CH_LAYOUT_QUAD|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT1POINT4_BACK (AV_CH_LAYOUT_5POINT1POINT2|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT1POINT2     (AV_CH_LAYOUT_7POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_7POINT1POINT4_BACK (AV_CH_LAYOUT_7POINT1POINT2|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT2POINT3     (AV_CH_LAYOUT_7POINT1POINT2|AV_CH_TOP_BACK_CENTER|AV_CH_LOW_FREQUENCY_2)
+#define AV_CH_LAYOUT_9POINT1POINT4_BACK (AV_CH_LAYOUT_7POINT1POINT4_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_9POINT1POINT6     (AV_CH_LAYOUT_9POINT1POINT4_BACK|AV_CH_TOP_SIDE_LEFT|AV_CH_TOP_SIDE_RIGHT)
+#define AV_CH_LAYOUT_HEXADECAGONAL     (AV_CH_LAYOUT_OCTAGONAL|AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_BINAURAL          (AV_CH_BINAURAL_LEFT|AV_CH_BINAURAL_RIGHT)
+#define AV_CH_LAYOUT_STEREO_DOWNMIX    (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
+#define AV_CH_LAYOUT_22POINT2          (AV_CH_LAYOUT_9POINT1POINT6|AV_CH_BACK_CENTER|AV_CH_LOW_FREQUENCY_2|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_CENTER|AV_CH_TOP_BACK_CENTER|AV_CH_BOTTOM_FRONT_CENTER|AV_CH_BOTTOM_FRONT_LEFT|AV_CH_BOTTOM_FRONT_RIGHT)
+
+#define AV_CH_LAYOUT_7POINT1_TOP_BACK AV_CH_LAYOUT_5POINT1POINT2_BACK
+
+enum AVMatrixEncoding {
+    AV_MATRIX_ENCODING_NONE,
+    AV_MATRIX_ENCODING_DOLBY,
+    AV_MATRIX_ENCODING_DPLII,
+    AV_MATRIX_ENCODING_DPLIIX,
+    AV_MATRIX_ENCODING_DPLIIZ,
+    AV_MATRIX_ENCODING_DOLBYEX,
+    AV_MATRIX_ENCODING_DOLBYHEADPHONE,
+    AV_MATRIX_ENCODING_NB
+};
+
+/**
+ * @}
+ */
+
+/**
+ * An AVChannelCustom defines a single channel within a custom order layout
+ *
+ * Unlike most structures in FFmpeg, sizeof(AVChannelCustom) is a part of the
+ * public ABI.
+ *
+ * No new fields may be added to it without a major version bump.
+ */
+typedef struct AVChannelCustom {
+    enum AVChannel id;
+    char name[16];
+    void *opaque;
+} AVChannelCustom;
+
+/**
+ * An AVChannelLayout holds information about the channel layout of audio data.
+ *
+ * A channel layout here is defined as a set of channels ordered in a specific
+ * way (unless the channel order is AV_CHANNEL_ORDER_UNSPEC, in which case an
+ * AVChannelLayout carries only the channel count).
+ * All orders may be treated as if they were AV_CHANNEL_ORDER_UNSPEC by
+ * ignoring everything but the channel count, as long as av_channel_layout_check()
+ * considers they are valid.
+ *
+ * Unlike most structures in FFmpeg, sizeof(AVChannelLayout) is a part of the
+ * public ABI and may be used by the caller. E.g. it may be allocated on stack
+ * or embedded in caller-defined structs.
+ *
+ * AVChannelLayout can be initialized as follows:
+ * - default initialization with {0}, followed by setting all used fields
+ *   correctly;
+ * - by assigning one of the predefined AV_CHANNEL_LAYOUT_* initializers;
+ * - with a constructor function, such as av_channel_layout_default(),
+ *   av_channel_layout_from_mask() or av_channel_layout_from_string().
+ *
+ * The channel layout must be unitialized with av_channel_layout_uninit()
+ *
+ * Copying an AVChannelLayout via assigning is forbidden,
+ * av_channel_layout_copy() must be used instead (and its return value should
+ * be checked)
+ *
+ * No new fields may be added to it without a major version bump, except for
+ * new elements of the union fitting in sizeof(uint64_t).
+ */
+typedef struct AVChannelLayout {
+    /**
+     * Channel order used in this layout.
+     * This is a mandatory field.
+     */
+    enum AVChannelOrder order;
+
+    /**
+     * Number of channels in this layout. Mandatory field.
+     */
+    int nb_channels;
+
+    /**
+     * Details about which channels are present in this layout.
+     * For AV_CHANNEL_ORDER_UNSPEC, this field is undefined and must not be
+     * used.
+     */
+    union {
+        /**
+         * This member must be used for AV_CHANNEL_ORDER_NATIVE, and may be used
+         * for AV_CHANNEL_ORDER_AMBISONIC to signal non-diegetic channels.
+         * It is a bitmask, where the position of each set bit means that the
+         * AVChannel with the corresponding value is present.
+         *
+         * I.e. when (mask & (1 << AV_CHAN_FOO)) is non-zero, then AV_CHAN_FOO
+         * is present in the layout. Otherwise it is not present.
+         *
+         * @note when a channel layout using a bitmask is constructed or
+         * modified manually (i.e.  not using any of the av_channel_layout_*
+         * functions), the code doing it must ensure that the number of set bits
+         * is equal to nb_channels.
+         */
+        uint64_t mask;
+        /**
+         * This member must be used when the channel order is
+         * AV_CHANNEL_ORDER_CUSTOM. It is a nb_channels-sized array, with each
+         * element signalling the presence of the AVChannel with the
+         * corresponding value in map[i].id.
+         *
+         * I.e. when map[i].id is equal to AV_CHAN_FOO, then AV_CH_FOO is the
+         * i-th channel in the audio data.
+         *
+         * When map[i].id is in the range between AV_CHAN_AMBISONIC_BASE and
+         * AV_CHAN_AMBISONIC_END (inclusive), the channel contains an ambisonic
+         * component with ACN index (as defined above)
+         * n = map[i].id - AV_CHAN_AMBISONIC_BASE.
+         *
+         * map[i].name may be filled with a 0-terminated string, in which case
+         * it will be used for the purpose of identifying the channel with the
+         * convenience functions below. Otherise it must be zeroed.
+         */
+        AVChannelCustom *map;
+    } u;
+
+    /**
+     * For some private data of the user.
+     */
+    void *opaque;
+} AVChannelLayout;
+
+/**
+ * Macro to define native channel layouts
+ *
+ * @note This doesn't use designated initializers for compatibility with C++ 17 and older.
+ */
+#define AV_CHANNEL_LAYOUT_MASK(nb, m) \
+    { /* .order */ AV_CHANNEL_ORDER_NATIVE, \
+      /* .nb_channels */  (nb), \
+      /* .u.mask */ { m }, \
+      /* .opaque */ NULL }
+
+/**
+ * @name Common pre-defined channel layouts
+ * @{
+ */
+#define AV_CHANNEL_LAYOUT_MONO              AV_CHANNEL_LAYOUT_MASK(1,  AV_CH_LAYOUT_MONO)
+#define AV_CHANNEL_LAYOUT_STEREO            AV_CHANNEL_LAYOUT_MASK(2,  AV_CH_LAYOUT_STEREO)
+#define AV_CHANNEL_LAYOUT_2POINT1           AV_CHANNEL_LAYOUT_MASK(3,  AV_CH_LAYOUT_2POINT1)
+#define AV_CHANNEL_LAYOUT_2_1               AV_CHANNEL_LAYOUT_MASK(3,  AV_CH_LAYOUT_2_1)
+#define AV_CHANNEL_LAYOUT_SURROUND          AV_CHANNEL_LAYOUT_MASK(3,  AV_CH_LAYOUT_SURROUND)
+#define AV_CHANNEL_LAYOUT_3POINT1           AV_CHANNEL_LAYOUT_MASK(4,  AV_CH_LAYOUT_3POINT1)
+#define AV_CHANNEL_LAYOUT_4POINT0           AV_CHANNEL_LAYOUT_MASK(4,  AV_CH_LAYOUT_4POINT0)
+#define AV_CHANNEL_LAYOUT_4POINT1           AV_CHANNEL_LAYOUT_MASK(5,  AV_CH_LAYOUT_4POINT1)
+#define AV_CHANNEL_LAYOUT_2_2               AV_CHANNEL_LAYOUT_MASK(4,  AV_CH_LAYOUT_2_2)
+#define AV_CHANNEL_LAYOUT_QUAD              AV_CHANNEL_LAYOUT_MASK(4,  AV_CH_LAYOUT_QUAD)
+#define AV_CHANNEL_LAYOUT_5POINT0           AV_CHANNEL_LAYOUT_MASK(5,  AV_CH_LAYOUT_5POINT0)
+#define AV_CHANNEL_LAYOUT_5POINT1           AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_5POINT1)
+#define AV_CHANNEL_LAYOUT_5POINT0_BACK      AV_CHANNEL_LAYOUT_MASK(5,  AV_CH_LAYOUT_5POINT0_BACK)
+#define AV_CHANNEL_LAYOUT_5POINT1_BACK      AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_5POINT1_BACK)
+#define AV_CHANNEL_LAYOUT_6POINT0           AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_6POINT0)
+#define AV_CHANNEL_LAYOUT_6POINT0_FRONT     AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_6POINT0_FRONT)
+#define AV_CHANNEL_LAYOUT_3POINT1POINT2     AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_3POINT1POINT2)
+#define AV_CHANNEL_LAYOUT_HEXAGONAL         AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_HEXAGONAL)
+#define AV_CHANNEL_LAYOUT_6POINT1           AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_6POINT1)
+#define AV_CHANNEL_LAYOUT_6POINT1_BACK      AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_6POINT1_BACK)
+#define AV_CHANNEL_LAYOUT_6POINT1_FRONT     AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_6POINT1_FRONT)
+#define AV_CHANNEL_LAYOUT_7POINT0           AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_7POINT0)
+#define AV_CHANNEL_LAYOUT_7POINT0_FRONT     AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_7POINT0_FRONT)
+#define AV_CHANNEL_LAYOUT_7POINT1           AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_7POINT1)
+#define AV_CHANNEL_LAYOUT_7POINT1_WIDE      AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_7POINT1_WIDE)
+#define AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_7POINT1_WIDE_BACK)
+#define AV_CHANNEL_LAYOUT_5POINT1POINT2     AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_5POINT1POINT2)
+#define AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_5POINT1POINT2_BACK)
+#define AV_CHANNEL_LAYOUT_OCTAGONAL         AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_OCTAGONAL)
+#define AV_CHANNEL_LAYOUT_CUBE              AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_CUBE)
+#define AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK AV_CHANNEL_LAYOUT_MASK(10, AV_CH_LAYOUT_5POINT1POINT4_BACK)
+#define AV_CHANNEL_LAYOUT_7POINT1POINT2     AV_CHANNEL_LAYOUT_MASK(10, AV_CH_LAYOUT_7POINT1POINT2)
+#define AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT1POINT4_BACK)
+#define AV_CHANNEL_LAYOUT_7POINT2POINT3     AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT2POINT3)
+#define AV_CHANNEL_LAYOUT_9POINT1POINT4_BACK AV_CHANNEL_LAYOUT_MASK(14, AV_CH_LAYOUT_9POINT1POINT4_BACK)
+#define AV_CHANNEL_LAYOUT_9POINT1POINT6     AV_CHANNEL_LAYOUT_MASK(16, AV_CH_LAYOUT_9POINT1POINT6)
+#define AV_CHANNEL_LAYOUT_HEXADECAGONAL     AV_CHANNEL_LAYOUT_MASK(16, AV_CH_LAYOUT_HEXADECAGONAL)
+#define AV_CHANNEL_LAYOUT_BINAURAL          AV_CHANNEL_LAYOUT_MASK(2,  AV_CH_LAYOUT_BINAURAL)
+#define AV_CHANNEL_LAYOUT_STEREO_DOWNMIX    AV_CHANNEL_LAYOUT_MASK(2,  AV_CH_LAYOUT_STEREO_DOWNMIX)
+#define AV_CHANNEL_LAYOUT_22POINT2          AV_CHANNEL_LAYOUT_MASK(24, AV_CH_LAYOUT_22POINT2)
+
+#define AV_CHANNEL_LAYOUT_7POINT1_TOP_BACK  AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK
+
+#define AV_CHANNEL_LAYOUT_AMBISONIC_FIRST_ORDER \
+    { /* .order */ AV_CHANNEL_ORDER_AMBISONIC, \
+      /* .nb_channels */ 4, \
+      /* .u.mask */ { 0 }, \
+      /* .opaque */ NULL }
+/** @} */
+
+struct AVBPrint;
+
+/**
+ * Get a human readable string in an abbreviated form describing a given channel.
+ * This is the inverse function of @ref av_channel_from_string().
+ *
+ * @param buf pre-allocated buffer where to put the generated string
+ * @param buf_size size in bytes of the buffer.
+ * @param channel the AVChannel whose name to get
+ * @return amount of bytes needed to hold the output string, or a negative AVERROR
+ *         on failure. If the returned value is bigger than buf_size, then the
+ *         string was truncated.
+ */
+int av_channel_name(char *buf, size_t buf_size, enum AVChannel channel);
+
+/**
+ * bprint variant of av_channel_name().
+ *
+ * @note the string will be appended to the bprint buffer.
+ */
+void av_channel_name_bprint(struct AVBPrint *bp, enum AVChannel channel_id);
+
+/**
+ * Get a human readable string describing a given channel.
+ *
+ * @param buf pre-allocated buffer where to put the generated string
+ * @param buf_size size in bytes of the buffer.
+ * @param channel the AVChannel whose description to get
+ * @return amount of bytes needed to hold the output string, or a negative AVERROR
+ *         on failure. If the returned value is bigger than buf_size, then the
+ *         string was truncated.
+ */
+int av_channel_description(char *buf, size_t buf_size, enum AVChannel channel);
+
+/**
+ * bprint variant of av_channel_description().
+ *
+ * @note the string will be appended to the bprint buffer.
+ */
+void av_channel_description_bprint(struct AVBPrint *bp, enum AVChannel channel_id);
+
+/**
+ * This is the inverse function of @ref av_channel_name().
+ *
+ * @return the channel with the given name
+ *         AV_CHAN_NONE when name does not identify a known channel
+ */
+enum AVChannel av_channel_from_string(const char *name);
+
+/**
+ * Initialize a custom channel layout with the specified number of channels.
+ * The channel map will be allocated and the designation of all channels will
+ * be set to AV_CHAN_UNKNOWN.
+ *
+ * This is only a convenience helper function, a custom channel layout can also
+ * be constructed without using this.
+ *
+ * @param channel_layout the layout structure to be initialized
+ * @param nb_channels the number of channels
+ *
+ * @return 0 on success
+ *         AVERROR(EINVAL) if the number of channels <= 0
+ *         AVERROR(ENOMEM) if the channel map could not be allocated
+ */
+int av_channel_layout_custom_init(AVChannelLayout *channel_layout, int nb_channels);
+
+/**
+ * Initialize a native channel layout from a bitmask indicating which channels
+ * are present.
+ *
+ * @param channel_layout the layout structure to be initialized
+ * @param mask bitmask describing the channel layout
+ *
+ * @return 0 on success
+ *         AVERROR(EINVAL) for invalid mask values
+ */
+int av_channel_layout_from_mask(AVChannelLayout *channel_layout, uint64_t mask);
+
+/**
+ * Initialize a channel layout from a given string description.
+ * The input string can be represented by:
+ *  - the formal channel layout name (returned by av_channel_layout_describe())
+ *  - single or multiple channel names (returned by av_channel_name(), eg. "FL",
+ *    or concatenated with "+", each optionally containing a custom name after
+ *    a "@", eg. "FL@Left+FR@Right+LFE")
+ *  - a decimal or hexadecimal value of a native channel layout (eg. "4" or "0x4")
+ *  - the number of channels with default layout (eg. "4c")
+ *  - the number of unordered channels (eg. "4C" or "4 channels")
+ *  - the ambisonic order followed by optional non-diegetic channels (eg.
+ *    "ambisonic 2+stereo")
+ * On error, the channel layout will remain uninitialized, but not necessarily
+ * untouched.
+ *
+ * @param channel_layout uninitialized channel layout for the result
+ * @param str string describing the channel layout
+ * @return 0 on success parsing the channel layout
+ *         AVERROR(EINVAL) if an invalid channel layout string was provided
+ *         AVERROR(ENOMEM) if there was not enough memory
+ */
+int av_channel_layout_from_string(AVChannelLayout *channel_layout,
+                                  const char *str);
+
+/**
+ * Get the default channel layout for a given number of channels.
+ *
+ * @param ch_layout the layout structure to be initialized
+ * @param nb_channels number of channels
+ */
+void av_channel_layout_default(AVChannelLayout *ch_layout, int nb_channels);
+
+/**
+ * Iterate over all standard channel layouts.
+ *
+ * @param opaque a pointer where libavutil will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the standard channel layout or NULL when the iteration is
+ *         finished
+ */
+const AVChannelLayout *av_channel_layout_standard(void **opaque);
+
+/**
+ * Free any allocated data in the channel layout and reset the channel
+ * count to 0.
+ *
+ * @param channel_layout the layout structure to be uninitialized
+ */
+void av_channel_layout_uninit(AVChannelLayout *channel_layout);
+
+/**
+ * Make a copy of a channel layout. This differs from just assigning src to dst
+ * in that it allocates and copies the map for AV_CHANNEL_ORDER_CUSTOM.
+ *
+ * @note the destination channel_layout will be always uninitialized before copy.
+ *
+ * @param dst destination channel layout
+ * @param src source channel layout
+ * @return 0 on success, a negative AVERROR on error.
+ */
+int av_channel_layout_copy(AVChannelLayout *dst, const AVChannelLayout *src);
+
+/**
+ * Get a human-readable string describing the channel layout properties.
+ * The string will be in the same format that is accepted by
+ * @ref av_channel_layout_from_string(), allowing to rebuild the same
+ * channel layout, except for opaque pointers.
+ *
+ * @param channel_layout channel layout to be described
+ * @param buf pre-allocated buffer where to put the generated string
+ * @param buf_size size in bytes of the buffer.
+ * @return amount of bytes needed to hold the output string, or a negative AVERROR
+ *         on failure. If the returned value is bigger than buf_size, then the
+ *         string was truncated.
+ */
+int av_channel_layout_describe(const AVChannelLayout *channel_layout,
+                               char *buf, size_t buf_size);
+
+/**
+ * bprint variant of av_channel_layout_describe().
+ *
+ * @note the string will be appended to the bprint buffer.
+ * @return 0 on success, or a negative AVERROR value on failure.
+ */
+int av_channel_layout_describe_bprint(const AVChannelLayout *channel_layout,
+                                      struct AVBPrint *bp);
+
+/**
+ * Get the channel with the given index in a channel layout.
+ *
+ * @param channel_layout input channel layout
+ * @param idx index of the channel
+ * @return channel with the index idx in channel_layout on success or
+ *         AV_CHAN_NONE on failure (if idx is not valid or the channel order is
+ *         unspecified)
+ */
+enum AVChannel
+av_channel_layout_channel_from_index(const AVChannelLayout *channel_layout, unsigned int idx);
+
+/**
+ * Get the index of a given channel in a channel layout. In case multiple
+ * channels are found, only the first match will be returned.
+ *
+ * @param channel_layout input channel layout
+ * @param channel the channel whose index to obtain
+ * @return index of channel in channel_layout on success or a negative number if
+ *         channel is not present in channel_layout.
+ */
+int av_channel_layout_index_from_channel(const AVChannelLayout *channel_layout,
+                                         enum AVChannel channel);
+
+/**
+ * Get the index in a channel layout of a channel described by the given string.
+ * In case multiple channels are found, only the first match will be returned.
+ *
+ * This function accepts channel names in the same format as
+ * @ref av_channel_from_string().
+ *
+ * @param channel_layout input channel layout
+ * @param name string describing the channel whose index to obtain
+ * @return a channel index described by the given string, or a negative AVERROR
+ *         value.
+ */
+int av_channel_layout_index_from_string(const AVChannelLayout *channel_layout,
+                                        const char *name);
+
+/**
+ * Get a channel described by the given string.
+ *
+ * This function accepts channel names in the same format as
+ * @ref av_channel_from_string().
+ *
+ * @param channel_layout input channel layout
+ * @param name string describing the channel to obtain
+ * @return a channel described by the given string in channel_layout on success
+ *         or AV_CHAN_NONE on failure (if the string is not valid or the channel
+ *         order is unspecified)
+ */
+enum AVChannel
+av_channel_layout_channel_from_string(const AVChannelLayout *channel_layout,
+                                      const char *name);
+
+/**
+ * Find out what channels from a given set are present in a channel layout,
+ * without regard for their positions.
+ *
+ * @param channel_layout input channel layout
+ * @param mask a combination of AV_CH_* representing a set of channels
+ * @return a bitfield representing all the channels from mask that are present
+ *         in channel_layout
+ */
+uint64_t av_channel_layout_subset(const AVChannelLayout *channel_layout,
+                                  uint64_t mask);
+
+/**
+ * Check whether a channel layout is valid, i.e. can possibly describe audio
+ * data.
+ *
+ * @param channel_layout input channel layout
+ * @return 1 if channel_layout is valid, 0 otherwise.
+ */
+int av_channel_layout_check(const AVChannelLayout *channel_layout);
+
+/**
+ * Check whether two channel layouts are semantically the same, i.e. the same
+ * channels are present on the same positions in both.
+ *
+ * If one of the channel layouts is AV_CHANNEL_ORDER_UNSPEC, while the other is
+ * not, they are considered to be unequal. If both are AV_CHANNEL_ORDER_UNSPEC,
+ * they are considered equal iff the channel counts are the same in both.
+ *
+ * @param chl input channel layout
+ * @param chl1 input channel layout
+ * @return 0 if chl and chl1 are equal, 1 if they are not equal. A negative
+ *         AVERROR code if one or both are invalid.
+ */
+int av_channel_layout_compare(const AVChannelLayout *chl, const AVChannelLayout *chl1);
+
+/**
+ * Return the order if the layout is n-th order standard-order ambisonic.
+ * The presence of optional extra non-diegetic channels at the end is not taken
+ * into account.
+ *
+ * @param channel_layout input channel layout
+ * @return the order of the layout, a negative error code otherwise.
+ */
+int av_channel_layout_ambisonic_order(const AVChannelLayout *channel_layout);
+
+/**
+ * The conversion must be lossless.
+ */
+#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_LOSSLESS (1 << 0)
+
+/**
+ * The specified retype target order is ignored and the simplest possible
+ * (canonical) order is used for which the input layout can be losslessy
+ * represented.
+ */
+#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL (1 << 1)
+
+/**
+ * Change the AVChannelOrder of a channel layout.
+ *
+ * Change of AVChannelOrder can be either lossless or lossy. In case of a
+ * lossless conversion all the channel designations and the associated channel
+ * names (if any) are kept. On a lossy conversion the channel names and channel
+ * designations might be lost depending on the capabilities of the desired
+ * AVChannelOrder. Note that some conversions are simply not possible in which
+ * case this function returns AVERROR(ENOSYS).
+ *
+ * The following conversions are supported:
+ *
+ * Any       -> Custom     : Always possible, always lossless.
+ * Any       -> Unspecified: Always possible, lossless if channel designations
+ *   are all unknown and channel names are not used, lossy otherwise.
+ * Custom    -> Ambisonic  : Possible if it contains ambisonic channels with
+ *   optional non-diegetic channels in the end. Lossy if the channels have
+ *   custom names, lossless otherwise.
+ * Custom    -> Native     : Possible if it contains native channels in native
+ *     order. Lossy if the channels have custom names, lossless otherwise.
+ *
+ * On error this function keeps the original channel layout untouched.
+ *
+ * @param channel_layout channel layout which will be changed
+ * @param order the desired channel layout order
+ * @param flags a combination of AV_CHANNEL_LAYOUT_RETYPE_FLAG_* constants
+ * @return 0 if the conversion was successful and lossless or if the channel
+ *           layout was already in the desired order
+ *         >0 if the conversion was successful but lossy
+ *         AVERROR(ENOSYS) if the conversion was not possible (or would be
+ *           lossy and AV_CHANNEL_LAYOUT_RETYPE_FLAG_LOSSLESS was specified)
+ *         AVERROR(EINVAL), AVERROR(ENOMEM) on error
+ */
+int av_channel_layout_retype(AVChannelLayout *channel_layout, enum AVChannelOrder order, int flags);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_CHANNEL_LAYOUT_H */

ffmpeg/include/libavutil/common.h

@@ -0,0 +1,589 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * common internal and external API header
+ */
+
+#ifndef AVUTIL_COMMON_H
+#define AVUTIL_COMMON_H
+
+#if defined(__cplusplus) && !defined(__STDC_CONSTANT_MACROS) && !defined(UINT64_C)
+#error missing -D__STDC_CONSTANT_MACROS / #define __STDC_CONSTANT_MACROS
+#endif
+
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "attributes.h"
+#include "error.h"
+#include "macros.h"
+#include "version.h"
+
+#ifdef HAVE_AV_CONFIG_H
+#   include "config.h"
+#   include "intmath.h"
+#   include "internal.h"
+#else
+#   include "mem.h"
+#endif /* HAVE_AV_CONFIG_H */
+
+//rounded division & shift
+#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
+/* assume b>0 */
+#define ROUNDED_DIV(a,b) (((a)>=0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
+/* Fast a/(1<<b) rounded toward +inf. Assume a>=0 and b>=0 */
+#define AV_CEIL_RSHIFT(a,b) (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \
+                                                       : ((a) + (1<<(b)) - 1) >> (b))
+/* Backwards compat. */
+#define FF_CEIL_RSHIFT AV_CEIL_RSHIFT
+
+#define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))
+#define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b))
+
+/**
+ * Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they
+ * are not representable as absolute values of their type. This is the same
+ * as with *abs()
+ * @see FFNABS()
+ */
+#define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
+#define FFSIGN(a) ((a) > 0 ? 1 : -1)
+
+/**
+ * Negative Absolute value.
+ * this works for all integers of all types.
+ * As with many macros, this evaluates its argument twice, it thus must not have
+ * a sideeffect, that is FFNABS(x++) has undefined behavior.
+ */
+#define FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
+
+/**
+ * Unsigned Absolute value.
+ * This takes the absolute value of a signed int and returns it as a unsigned.
+ * This also works with INT_MIN which would otherwise not be representable
+ * As with many macros, this evaluates its argument twice.
+ */
+#define FFABSU(a) ((a) <= 0 ? -(unsigned)(a) : (unsigned)(a))
+#define FFABS64U(a) ((a) <= 0 ? -(uint64_t)(a) : (uint64_t)(a))
+
+/* misc math functions */
+
+#ifndef av_ceil_log2
+#   define av_ceil_log2     av_ceil_log2_c
+#endif
+#ifndef av_clip
+#   define av_clip          av_clip_c
+#endif
+#ifndef av_clip64
+#   define av_clip64        av_clip64_c
+#endif
+#ifndef av_clip_uint8
+#   define av_clip_uint8    av_clip_uint8_c
+#endif
+#ifndef av_clip_int8
+#   define av_clip_int8     av_clip_int8_c
+#endif
+#ifndef av_clip_uint16
+#   define av_clip_uint16   av_clip_uint16_c
+#endif
+#ifndef av_clip_int16
+#   define av_clip_int16    av_clip_int16_c
+#endif
+#ifndef av_clipl_int32
+#   define av_clipl_int32   av_clipl_int32_c
+#endif
+#ifndef av_clip_intp2
+#   define av_clip_intp2    av_clip_intp2_c
+#endif
+#ifndef av_clip_uintp2
+#   define av_clip_uintp2   av_clip_uintp2_c
+#endif
+#ifndef av_sat_add32
+#   define av_sat_add32     av_sat_add32_c
+#endif
+#ifndef av_sat_dadd32
+#   define av_sat_dadd32    av_sat_dadd32_c
+#endif
+#ifndef av_sat_sub32
+#   define av_sat_sub32     av_sat_sub32_c
+#endif
+#ifndef av_sat_dsub32
+#   define av_sat_dsub32    av_sat_dsub32_c
+#endif
+#ifndef av_sat_add64
+#   define av_sat_add64     av_sat_add64_c
+#endif
+#ifndef av_sat_sub64
+#   define av_sat_sub64     av_sat_sub64_c
+#endif
+#ifndef av_clipf
+#   define av_clipf         av_clipf_c
+#endif
+#ifndef av_clipd
+#   define av_clipd         av_clipd_c
+#endif
+#ifndef av_zero_extend
+#   define av_zero_extend   av_zero_extend_c
+#endif
+#ifndef av_popcount
+#   define av_popcount      av_popcount_c
+#endif
+#ifndef av_popcount64
+#   define av_popcount64    av_popcount64_c
+#endif
+#ifndef av_parity
+#   define av_parity        av_parity_c
+#endif
+
+#ifndef av_log2
+av_const int av_log2(unsigned v);
+#endif
+
+#ifndef av_log2_16bit
+av_const int av_log2_16bit(unsigned v);
+#endif
+
+/**
+ * Clip a signed integer value into the amin-amax range.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const int av_clip_c(int a, int amin, int amax)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    if      (a < amin) return amin;
+    else if (a > amax) return amax;
+    else               return a;
+}
+
+/**
+ * Clip a signed 64bit integer value into the amin-amax range.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const int64_t av_clip64_c(int64_t a, int64_t amin, int64_t amax)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    if      (a < amin) return amin;
+    else if (a > amax) return amax;
+    else               return a;
+}
+
+/**
+ * Clip a signed integer value into the 0-255 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const uint8_t av_clip_uint8_c(int a)
+{
+    if (a&(~0xFF)) return (~a)>>31;
+    else           return a;
+}
+
+/**
+ * Clip a signed integer value into the -128,127 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const int8_t av_clip_int8_c(int a)
+{
+    if ((a+0x80U) & ~0xFF) return (a>>31) ^ 0x7F;
+    else                  return a;
+}
+
+/**
+ * Clip a signed integer value into the 0-65535 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const uint16_t av_clip_uint16_c(int a)
+{
+    if (a&(~0xFFFF)) return (~a)>>31;
+    else             return a;
+}
+
+/**
+ * Clip a signed integer value into the -32768,32767 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const int16_t av_clip_int16_c(int a)
+{
+    if ((a+0x8000U) & ~0xFFFF) return (a>>31) ^ 0x7FFF;
+    else                      return a;
+}
+
+/**
+ * Clip a signed 64-bit integer value into the -2147483648,2147483647 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const int32_t av_clipl_int32_c(int64_t a)
+{
+    if ((a+UINT64_C(0x80000000)) & ~UINT64_C(0xFFFFFFFF)) return (int32_t)((a>>63) ^ 0x7FFFFFFF);
+    else                                                  return (int32_t)a;
+}
+
+/**
+ * Clip a signed integer into the -(2^p),(2^p-1) range.
+ * @param  a value to clip
+ * @param  p bit position to clip at
+ * @return clipped value
+ */
+static av_always_inline av_const int av_clip_intp2_c(int a, int p)
+{
+    if (((unsigned)a + (1U << p)) & ~((2U << p) - 1))
+        return (a >> 31) ^ ((1 << p) - 1);
+    else
+        return a;
+}
+
+/**
+ * Clip a signed integer to an unsigned power of two range.
+ * @param  a value to clip
+ * @param  p bit position to clip at
+ * @return clipped value
+ */
+static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
+{
+    if (a & ~((1U<<p) - 1)) return (~a) >> 31 & ((1U<<p) - 1);
+    else                    return  a;
+}
+
+/**
+ * Clear high bits from an unsigned integer starting with specific bit position
+ * @param  a value to clip
+ * @param  p bit position to clip at. Must be between 0 and 31.
+ * @return clipped value
+ */
+static av_always_inline av_const unsigned av_zero_extend_c(unsigned a, unsigned p)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (p > 31) abort();
+#endif
+    return a & ((1U << p) - 1);
+}
+
+#if FF_API_MOD_UINTP2
+#ifndef av_mod_uintp2
+#   define av_mod_uintp2 av_mod_uintp2_c
+#endif
+attribute_deprecated
+static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a, unsigned p)
+{
+    return av_zero_extend_c(a, p);
+}
+#endif
+
+/**
+ * Add two signed 32-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return sum with signed saturation
+ */
+static av_always_inline int av_sat_add32_c(int a, int b)
+{
+    return av_clipl_int32((int64_t)a + b);
+}
+
+/**
+ * Add a doubled value to another value with saturation at both stages.
+ *
+ * @param  a first value
+ * @param  b value doubled and added to a
+ * @return sum sat(a + sat(2*b)) with signed saturation
+ */
+static av_always_inline int av_sat_dadd32_c(int a, int b)
+{
+    return av_sat_add32(a, av_sat_add32(b, b));
+}
+
+/**
+ * Subtract two signed 32-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return difference with signed saturation
+ */
+static av_always_inline int av_sat_sub32_c(int a, int b)
+{
+    return av_clipl_int32((int64_t)a - b);
+}
+
+/**
+ * Subtract a doubled value from another value with saturation at both stages.
+ *
+ * @param  a first value
+ * @param  b value doubled and subtracted from a
+ * @return difference sat(a - sat(2*b)) with signed saturation
+ */
+static av_always_inline int av_sat_dsub32_c(int a, int b)
+{
+    return av_sat_sub32(a, av_sat_add32(b, b));
+}
+
+/**
+ * Add two signed 64-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return sum with signed saturation
+ */
+static av_always_inline int64_t av_sat_add64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_add_overflow)
+    int64_t tmp;
+    return !__builtin_add_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
+    int64_t s = a+(uint64_t)b;
+    if ((int64_t)(a^b | ~s^b) >= 0)
+        return INT64_MAX ^ (b >> 63);
+    return s;
+#endif
+}
+
+/**
+ * Subtract two signed 64-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return difference with signed saturation
+ */
+static av_always_inline int64_t av_sat_sub64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_sub_overflow)
+    int64_t tmp;
+    return !__builtin_sub_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
+    if (b <= 0 && a >= INT64_MAX + b)
+        return INT64_MAX;
+    if (b >= 0 && a <= INT64_MIN + b)
+        return INT64_MIN;
+    return a - b;
+#endif
+}
+
+/**
+ * Clip a float value into the amin-amax range.
+ * If a is nan or -inf amin will be returned.
+ * If a is +inf amax will be returned.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const float av_clipf_c(float a, float amin, float amax)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    return FFMIN(FFMAX(a, amin), amax);
+}
+
+/**
+ * Clip a double value into the amin-amax range.
+ * If a is nan or -inf amin will be returned.
+ * If a is +inf amax will be returned.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const double av_clipd_c(double a, double amin, double amax)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    return FFMIN(FFMAX(a, amin), amax);
+}
+
+/** Compute ceil(log2(x)).
+ * @param x value used to compute ceil(log2(x))
+ * @return computed ceiling of log2(x)
+ */
+static av_always_inline av_const int av_ceil_log2_c(int x)
+{
+    return av_log2((x - 1U) << 1);
+}
+
+/**
+ * Count number of bits set to one in x
+ * @param x value to count bits of
+ * @return the number of bits set to one in x
+ */
+static av_always_inline av_const int av_popcount_c(uint32_t x)
+{
+    x -= (x >> 1) & 0x55555555;
+    x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
+    x = (x + (x >> 4)) & 0x0F0F0F0F;
+    x += x >> 8;
+    return (x + (x >> 16)) & 0x3F;
+}
+
+/**
+ * Count number of bits set to one in x
+ * @param x value to count bits of
+ * @return the number of bits set to one in x
+ */
+static av_always_inline av_const int av_popcount64_c(uint64_t x)
+{
+    return av_popcount((uint32_t)x) + av_popcount((uint32_t)(x >> 32));
+}
+
+static av_always_inline av_const int av_parity_c(uint32_t v)
+{
+    return av_popcount(v) & 1;
+}
+
+/**
+ * Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.
+ *
+ * @param val      Output value, must be an lvalue of type uint32_t.
+ * @param GET_BYTE Expression reading one byte from the input.
+ *                 Evaluated up to 7 times (4 for the currently
+ *                 assigned Unicode range).  With a memory buffer
+ *                 input, this could be *ptr++, or if you want to make sure
+ *                 that *ptr stops at the end of a NULL terminated string then
+ *                 *ptr ? *ptr++ : 0
+ * @param ERROR    Expression to be evaluated on invalid input,
+ *                 typically a goto statement.
+ *
+ * @warning ERROR should not contain a loop control statement which
+ * could interact with the internal while loop, and should force an
+ * exit from the macro code (e.g. through a goto or a return) in order
+ * to prevent undefined results.
+ */
+#define GET_UTF8(val, GET_BYTE, ERROR)\
+    val= (GET_BYTE);\
+    {\
+        uint32_t top = (val & 128) >> 1;\
+        if ((val & 0xc0) == 0x80 || val >= 0xFE)\
+            {ERROR}\
+        while (val & top) {\
+            unsigned int tmp = (GET_BYTE) - 128;\
+            if(tmp>>6)\
+                {ERROR}\
+            val= (val<<6) + tmp;\
+            top <<= 5;\
+        }\
+        val &= (top << 1) - 1;\
+    }
+
+/**
+ * Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.
+ *
+ * @param val       Output value, must be an lvalue of type uint32_t.
+ * @param GET_16BIT Expression returning two bytes of UTF-16 data converted
+ *                  to native byte order.  Evaluated one or two times.
+ * @param ERROR     Expression to be evaluated on invalid input,
+ *                  typically a goto statement.
+ */
+#define GET_UTF16(val, GET_16BIT, ERROR)\
+    val = (GET_16BIT);\
+    {\
+        unsigned int hi = val - 0xD800;\
+        if (hi < 0x800) {\
+            val = (GET_16BIT) - 0xDC00;\
+            if (val > 0x3FFU || hi > 0x3FFU)\
+                {ERROR}\
+            val += (hi<<10) + 0x10000;\
+        }\
+    }\
+
+/**
+ * @def PUT_UTF8(val, tmp, PUT_BYTE)
+ * Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
+ * @param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-8. If
+ * val is given as a function it is executed only once.
+ * @param tmp is a temporary variable and should be of type uint8_t. It
+ * represents an intermediate value during conversion that is to be
+ * output by PUT_BYTE.
+ * @param PUT_BYTE writes the converted UTF-8 bytes to any proper destination.
+ * It could be a function or a statement, and uses tmp as the input byte.
+ * For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
+ * executed up to 4 times for values in the valid UTF-8 range and up to
+ * 7 times in the general case, depending on the length of the converted
+ * Unicode character.
+ */
+#define PUT_UTF8(val, tmp, PUT_BYTE)\
+    {\
+        int bytes, shift;\
+        uint32_t in = val;\
+        if (in < 0x80) {\
+            tmp = in;\
+            PUT_BYTE\
+        } else {\
+            bytes = (av_log2(in) + 4) / 5;\
+            shift = (bytes - 1) * 6;\
+            tmp = (256 - (256 >> bytes)) | (in >> shift);\
+            PUT_BYTE\
+            while (shift >= 6) {\
+                shift -= 6;\
+                tmp = 0x80 | ((in >> shift) & 0x3f);\
+                PUT_BYTE\
+            }\
+        }\
+    }
+
+/**
+ * @def PUT_UTF16(val, tmp, PUT_16BIT)
+ * Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes).
+ * @param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-16. If
+ * val is given as a function it is executed only once.
+ * @param tmp is a temporary variable and should be of type uint16_t. It
+ * represents an intermediate value during conversion that is to be
+ * output by PUT_16BIT.
+ * @param PUT_16BIT writes the converted UTF-16 data to any proper destination
+ * in desired endianness. It could be a function or a statement, and uses tmp
+ * as the input byte.  For example, PUT_BYTE could be "*output++ = tmp;"
+ * PUT_BYTE will be executed 1 or 2 times depending on input character.
+ */
+#define PUT_UTF16(val, tmp, PUT_16BIT)\
+    {\
+        uint32_t in = val;\
+        if (in < 0x10000) {\
+            tmp = in;\
+            PUT_16BIT\
+        } else {\
+            tmp = 0xD800 | ((in - 0x10000) >> 10);\
+            PUT_16BIT\
+            tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
+            PUT_16BIT\
+        }\
+    }\
+
+#endif /* AVUTIL_COMMON_H */

ffmpeg/include/libavutil/container_fifo.h

@@ -0,0 +1,130 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CONTAINER_FIFO_H
+#define AVUTIL_CONTAINER_FIFO_H
+
+#include <stddef.h>
+
+/**
+ * AVContainerFifo is a FIFO for "containers" - dynamically allocated reusable
+ * structs (e.g. AVFrame or AVPacket). AVContainerFifo uses an internal pool of
+ * such containers to avoid allocating and freeing them repeatedly.
+ */
+typedef struct AVContainerFifo AVContainerFifo;
+
+enum AVContainerFifoFlags {
+    /**
+     * Signal to av_container_fifo_write() that it should make a new reference
+     * to data in src rather than consume its contents.
+     *
+     * @note you must handle this flag manually in your own fifo_transfer()
+     *       callback
+     */
+    AV_CONTAINER_FIFO_FLAG_REF  = (1 << 0),
+
+    /**
+     * This and all higher bits in flags may be set to any value by the caller
+     * and are guaranteed to be passed through to the fifo_transfer() callback
+     * and not be interpreted by AVContainerFifo code.
+     */
+    AV_CONTAINER_FIFO_FLAG_USER = (1 << 16),
+};
+
+/**
+ * Allocate a new AVContainerFifo for the container type defined by provided
+ * callbacks.
+ *
+ * @param opaque user data that will be passed to the callbacks provided to this
+ *               function
+ * @param container_alloc allocate a new container instance and return a pointer
+ *                        to it, or NULL on failure
+ * @param container_reset reset the provided container instance to a clean state
+ * @param container_free free the provided container instance
+ * @param fifo_transfer Transfer the contents of container src to dst.
+ * @param flags currently unused
+ *
+ * @return newly allocated AVContainerFifo, or NULL on failure
+ */
+AVContainerFifo*
+av_container_fifo_alloc(void *opaque,
+                        void* (*container_alloc)(void *opaque),
+                        void  (*container_reset)(void *opaque, void *obj),
+                        void  (*container_free) (void *opaque, void *obj),
+                        int   (*fifo_transfer)  (void *opaque, void *dst, void *src, unsigned flags),
+                        unsigned flags);
+
+/**
+ * Allocate an AVContainerFifo instance for AVFrames.
+ *
+ * @param flags currently unused
+ */
+AVContainerFifo *av_container_fifo_alloc_avframe(unsigned flags);
+
+/**
+ * Free a AVContainerFifo and everything in it.
+ */
+void av_container_fifo_free(AVContainerFifo **cf);
+
+/**
+ * Write the contents of obj to the FIFO.
+ *
+ * The fifo_transfer() callback previously provided to av_container_fifo_alloc()
+ * will be called with obj as src in order to perform the actual transfer.
+ */
+int av_container_fifo_write(AVContainerFifo *cf, void *obj, unsigned flags);
+
+/**
+ * Read the next available object from the FIFO into obj.
+ *
+ * The fifo_read() callback previously provided to av_container_fifo_alloc()
+ * will be called with obj as dst in order to perform the actual transfer.
+ */
+int av_container_fifo_read(AVContainerFifo *cf, void *obj, unsigned flags);
+
+/**
+ * Access objects stored in the FIFO without retrieving them. The
+ * fifo_transfer() callback will NOT be invoked and the FIFO state will not be
+ * modified.
+ *
+ * @param pobj Pointer to the object stored in the FIFO will be written here on
+ *             success. The object remains owned by the FIFO and the caller may
+ *             only access it as long as the FIFO is not modified.
+ * @param offset Position of the object to retrieve - 0 is the next item that
+ *               would be read, 1 the one after, etc. Must be smaller than
+ *               av_container_fifo_can_read().
+ *
+ * @retval 0 success, a pointer was written into pobj
+ * @retval AVERROR(EINVAL) invalid offset value
+ */
+int av_container_fifo_peek(AVContainerFifo *cf, void **pobj, size_t offset);
+
+/**
+ * Discard the specified number of elements from the FIFO.
+ *
+ * @param nb_elems number of elements to discard, MUST NOT be larger than
+ *                 av_fifo_can_read(f)
+ */
+void av_container_fifo_drain(AVContainerFifo *cf, size_t nb_elems);
+
+/**
+ * @return number of objects available for reading
+ */
+size_t av_container_fifo_can_read(const AVContainerFifo *cf);
+
+#endif // AVCODEC_CONTAINER_FIFO_H

ffmpeg/include/libavutil/cpu.h

@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CPU_H
+#define AVUTIL_CPU_H
+
+#include <stddef.h>
+#include "version.h"
+
+#define AV_CPU_FLAG_FORCE    0x80000000 /* force usage of selected flags (OR) */
+
+    /* lower 16 bits - CPU features */
+#define AV_CPU_FLAG_MMX          0x0001 ///< standard MMX
+#define AV_CPU_FLAG_MMXEXT       0x0002 ///< SSE integer functions or AMD MMX ext
+#define AV_CPU_FLAG_MMX2         0x0002 ///< SSE integer functions or AMD MMX ext
+#define AV_CPU_FLAG_3DNOW        0x0004 ///< AMD 3DNOW
+#define AV_CPU_FLAG_SSE          0x0008 ///< SSE functions
+#define AV_CPU_FLAG_SSE2         0x0010 ///< PIV SSE2 functions
+#define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster
+                                        ///< than regular MMX/SSE (e.g. Core1)
+#define AV_CPU_FLAG_3DNOWEXT     0x0020 ///< AMD 3DNowExt
+#define AV_CPU_FLAG_SSE3         0x0040 ///< Prescott SSE3 functions
+#define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster
+                                        ///< than regular MMX/SSE (e.g. Core1)
+#define AV_CPU_FLAG_SSSE3        0x0080 ///< Conroe SSSE3 functions
+#define AV_CPU_FLAG_SSSE3SLOW 0x4000000 ///< SSSE3 supported, but usually not faster
+#define AV_CPU_FLAG_ATOM     0x10000000 ///< Atom processor, some SSSE3 instructions are slower
+#define AV_CPU_FLAG_SSE4         0x0100 ///< Penryn SSE4.1 functions
+#define AV_CPU_FLAG_SSE42        0x0200 ///< Nehalem SSE4.2 functions
+#define AV_CPU_FLAG_AESNI       0x80000 ///< Advanced Encryption Standard functions
+#define AV_CPU_FLAG_AVX          0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used
+#define AV_CPU_FLAG_AVXSLOW   0x8000000 ///< AVX supported, but slow when using YMM registers (e.g. Bulldozer)
+#define AV_CPU_FLAG_XOP          0x0400 ///< Bulldozer XOP functions
+#define AV_CPU_FLAG_FMA4         0x0800 ///< Bulldozer FMA4 functions
+#define AV_CPU_FLAG_CMOV         0x1000 ///< supports cmov instruction
+#define AV_CPU_FLAG_AVX2         0x8000 ///< AVX2 functions: requires OS support even if YMM registers aren't used
+#define AV_CPU_FLAG_FMA3        0x10000 ///< Haswell FMA3 functions
+#define AV_CPU_FLAG_BMI1        0x20000 ///< Bit Manipulation Instruction Set 1
+#define AV_CPU_FLAG_BMI2        0x40000 ///< Bit Manipulation Instruction Set 2
+#define AV_CPU_FLAG_AVX512     0x100000 ///< AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used
+#define AV_CPU_FLAG_AVX512ICL  0x200000 ///< F/CD/BW/DQ/VL/VNNI/IFMA/VBMI/VBMI2/VPOPCNTDQ/BITALG/GFNI/VAES/VPCLMULQDQ
+#define AV_CPU_FLAG_SLOW_GATHER  0x2000000 ///< CPU has slow gathers.
+
+#define AV_CPU_FLAG_ALTIVEC      0x0001 ///< standard
+#define AV_CPU_FLAG_VSX          0x0002 ///< ISA 2.06
+#define AV_CPU_FLAG_POWER8       0x0004 ///< ISA 2.07
+
+#define AV_CPU_FLAG_ARMV5TE      (1 << 0)
+#define AV_CPU_FLAG_ARMV6        (1 << 1)
+#define AV_CPU_FLAG_ARMV6T2      (1 << 2)
+#define AV_CPU_FLAG_VFP          (1 << 3)
+#define AV_CPU_FLAG_VFPV3        (1 << 4)
+#define AV_CPU_FLAG_NEON         (1 << 5)
+#define AV_CPU_FLAG_ARMV8        (1 << 6)
+#define AV_CPU_FLAG_VFP_VM       (1 << 7) ///< VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations
+#define AV_CPU_FLAG_DOTPROD      (1 << 8)
+#define AV_CPU_FLAG_I8MM         (1 << 9)
+#define AV_CPU_FLAG_SVE          (1 <<10)
+#define AV_CPU_FLAG_SVE2         (1 <<11)
+#define AV_CPU_FLAG_SETEND       (1 <<16)
+
+#define AV_CPU_FLAG_MMI          (1 << 0)
+#define AV_CPU_FLAG_MSA          (1 << 1)
+
+//Loongarch SIMD extension.
+#define AV_CPU_FLAG_LSX          (1 << 0)
+#define AV_CPU_FLAG_LASX         (1 << 1)
+
+// RISC-V extensions
+#define AV_CPU_FLAG_RVI          (1 << 0) ///< I (full GPR bank)
+#if FF_API_RISCV_FD_ZBA
+#define AV_CPU_FLAG_RVF          (1 << 1) ///< F (single precision FP)
+#define AV_CPU_FLAG_RVD          (1 << 2) ///< D (double precision FP)
+#endif
+#define AV_CPU_FLAG_RVV_I32      (1 << 3) ///< Vectors of 8/16/32-bit int's */
+#define AV_CPU_FLAG_RVV_F32      (1 << 4) ///< Vectors of float's */
+#define AV_CPU_FLAG_RVV_I64      (1 << 5) ///< Vectors of 64-bit int's */
+#define AV_CPU_FLAG_RVV_F64      (1 << 6) ///< Vectors of double's
+#define AV_CPU_FLAG_RVB_BASIC    (1 << 7) ///< Basic bit-manipulations
+#if FF_API_RISCV_FD_ZBA
+#define AV_CPU_FLAG_RVB_ADDR     (1 << 8) ///< Address bit-manipulations
+#endif
+#define AV_CPU_FLAG_RV_ZVBB      (1 << 9) ///< Vector basic bit-manipulations
+#define AV_CPU_FLAG_RV_MISALIGNED (1 <<10) ///< Fast misaligned accesses
+#define AV_CPU_FLAG_RVB          (1 <<11) ///< B (bit manipulations)
+
+// WASM extensions
+#define AV_CPU_FLAG_SIMD128      (1 << 0)
+
+/**
+ * Return the flags which specify extensions supported by the CPU.
+ * The returned value is affected by av_force_cpu_flags() if that was used
+ * before. So av_get_cpu_flags() can easily be used in an application to
+ * detect the enabled cpu flags.
+ */
+int av_get_cpu_flags(void);
+
+/**
+ * Disables cpu detection and forces the specified flags.
+ * -1 is a special case that disables forcing of specific flags.
+ */
+void av_force_cpu_flags(int flags);
+
+/**
+ * Parse CPU caps from a string and update the given AV_CPU_* flags based on that.
+ *
+ * @return negative on error.
+ */
+int av_parse_cpu_caps(unsigned *flags, const char *s);
+
+/**
+ * @return the number of logical CPU cores present.
+ */
+int av_cpu_count(void);
+
+/**
+ * Overrides cpu count detection and forces the specified count.
+ * Count < 1 disables forcing of specific count.
+ */
+void av_cpu_force_count(int count);
+
+/**
+ * Get the maximum data alignment that may be required by FFmpeg.
+ *
+ * Note that this is affected by the build configuration and the CPU flags mask,
+ * so e.g. if the CPU supports AVX, but libavutil has been built with
+ * --disable-avx or the AV_CPU_FLAG_AVX flag has been disabled through
+ *  av_set_cpu_flags_mask(), then this function will behave as if AVX is not
+ *  present.
+ */
+size_t av_cpu_max_align(void);
+
+#endif /* AVUTIL_CPU_H */

ffmpeg/include/libavutil/crc.h

@@ -0,0 +1,102 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_crc32
+ * Public header for CRC hash function implementation.
+ */
+
+#ifndef AVUTIL_CRC_H
+#define AVUTIL_CRC_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include "attributes.h"
+
+/**
+ * @defgroup lavu_crc32 CRC
+ * @ingroup lavu_hash
+ * CRC (Cyclic Redundancy Check) hash function implementation.
+ *
+ * This module supports numerous CRC polynomials, in addition to the most
+ * widely used CRC-32-IEEE. See @ref AVCRCId for a list of available
+ * polynomials.
+ *
+ * @{
+ */
+
+typedef uint32_t AVCRC;
+
+typedef enum {
+    AV_CRC_8_ATM,
+    AV_CRC_16_ANSI,
+    AV_CRC_16_CCITT,
+    AV_CRC_32_IEEE,
+    AV_CRC_32_IEEE_LE,  /*< reversed bitorder version of AV_CRC_32_IEEE */
+    AV_CRC_16_ANSI_LE,  /*< reversed bitorder version of AV_CRC_16_ANSI */
+    AV_CRC_24_IEEE,
+    AV_CRC_8_EBU,
+    AV_CRC_MAX,         /*< Not part of public API! Do not use outside libavutil. */
+}AVCRCId;
+
+/**
+ * Initialize a CRC table.
+ * @param ctx must be an array of size sizeof(AVCRC)*257 or sizeof(AVCRC)*1024
+ * @param le If 1, the lowest bit represents the coefficient for the highest
+ *           exponent of the corresponding polynomial (both for poly and
+ *           actual CRC).
+ *           If 0, you must swap the CRC parameter and the result of av_crc
+ *           if you need the standard representation (can be simplified in
+ *           most cases to e.g. bswap16):
+ *           av_bswap32(crc << (32-bits))
+ * @param bits number of bits for the CRC
+ * @param poly generator polynomial without the x**bits coefficient, in the
+ *             representation as specified by le
+ * @param ctx_size size of ctx in bytes
+ * @return <0 on failure
+ */
+int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
+
+/**
+ * Get an initialized standard CRC table.
+ * @param crc_id ID of a standard CRC
+ * @return a pointer to the CRC table or NULL on failure
+ */
+const AVCRC *av_crc_get_table(AVCRCId crc_id);
+
+/**
+ * Calculate the CRC of a block.
+ * @param ctx initialized AVCRC array (see av_crc_init())
+ * @param crc CRC of previous blocks if any or initial value for CRC
+ * @param buffer buffer whose CRC to calculate
+ * @param length length of the buffer
+ * @return CRC updated with the data from the given block
+ *
+ * @see av_crc_init() "le" parameter
+ */
+uint32_t av_crc(const AVCRC *ctx, uint32_t crc,
+                const uint8_t *buffer, size_t length) av_pure;
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_CRC_H */

ffmpeg/include/libavutil/csp.h

@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2015 Kevin Wheatley <kevin.j.wheatley@gmail.com>
+ * Copyright (c) 2016 Ronald S. Bultje <rsbultje@gmail.com>
+ * Copyright (c) 2023 Leo Izen <leo.izen@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CSP_H
+#define AVUTIL_CSP_H
+
+#include "pixfmt.h"
+#include "rational.h"
+
+/**
+ * @file
+ * Colorspace value utility functions for libavutil.
+ * @ingroup lavu_math_csp
+ * @author Ronald S. Bultje <rsbultje@gmail.com>
+ * @author Leo Izen <leo.izen@gmail.com>
+ * @author Kevin Wheatley <kevin.j.wheatley@gmail.com>
+ */
+
+/**
+ * @defgroup lavu_math_csp Colorspace Utility
+ * @ingroup lavu_math
+ * @{
+ */
+
+/**
+ * Struct containing luma coefficients to be used for RGB to YUV/YCoCg, or similar
+ * calculations.
+ */
+typedef struct AVLumaCoefficients {
+    AVRational cr, cg, cb;
+} AVLumaCoefficients;
+
+/**
+ * Struct containing chromaticity x and y values for the standard CIE 1931
+ * chromaticity definition.
+ */
+typedef struct AVCIExy {
+    AVRational x, y;
+} AVCIExy;
+
+/**
+ * Struct defining the red, green, and blue primary locations in terms of CIE
+ * 1931 chromaticity x and y.
+ */
+typedef struct AVPrimaryCoefficients {
+    AVCIExy r, g, b;
+} AVPrimaryCoefficients;
+
+/**
+ * Struct defining white point location in terms of CIE 1931 chromaticity x
+ * and y.
+ */
+typedef AVCIExy AVWhitepointCoefficients;
+
+/**
+ * Struct that contains both white point location and primaries location, providing
+ * the complete description of a color gamut.
+ */
+typedef struct AVColorPrimariesDesc {
+    AVWhitepointCoefficients wp;
+    AVPrimaryCoefficients prim;
+} AVColorPrimariesDesc;
+
+/**
+ * Function pointer representing a double -> double transfer function that
+ * performs either an OETF transfer function, or alternatively an inverse EOTF
+ * function (in particular, for SMPTE ST 2084 / PQ). This function inputs
+ * linear light, and outputs gamma encoded light.
+ *
+ * See ITU-T H.273 for more information.
+ */
+typedef double (*av_csp_trc_function)(double);
+
+/**
+ * Retrieves the Luma coefficients necessary to construct a conversion matrix
+ * from an enum constant describing the colorspace.
+ * @param csp An enum constant indicating YUV or similar colorspace.
+ * @return The Luma coefficients associated with that colorspace, or NULL
+ *     if the constant is unknown to libavutil.
+ */
+const AVLumaCoefficients *av_csp_luma_coeffs_from_avcsp(enum AVColorSpace csp);
+
+/**
+ * Retrieves a complete gamut description from an enum constant describing the
+ * color primaries.
+ * @param prm An enum constant indicating primaries
+ * @return A description of the colorspace gamut associated with that enum
+ *     constant, or NULL if the constant is unknown to libavutil.
+ */
+const AVColorPrimariesDesc *av_csp_primaries_desc_from_id(enum AVColorPrimaries prm);
+
+/**
+ * Detects which enum AVColorPrimaries constant corresponds to the given complete
+ * gamut description.
+ * @see enum AVColorPrimaries
+ * @param prm A description of the colorspace gamut
+ * @return The enum constant associated with this gamut, or
+ *     AVCOL_PRI_UNSPECIFIED if no clear match can be idenitified.
+ */
+enum AVColorPrimaries av_csp_primaries_id_from_desc(const AVColorPrimariesDesc *prm);
+
+/**
+ * Determine a suitable 'gamma' value to match the supplied
+ * AVColorTransferCharacteristic.
+ *
+ * See Apple Technical Note TN2257 (https://developer.apple.com/library/mac/technotes/tn2257/_index.html)
+ *
+ * This function returns the gamma exponent for the OETF. For example, sRGB is approximated
+ * by gamma 2.2, not by gamma 0.45455.
+ *
+ * @return Will return an approximation to the simple gamma function matching
+ *         the supplied Transfer Characteristic, Will return 0.0 for any
+ *         we cannot reasonably match against.
+ */
+double av_csp_approximate_trc_gamma(enum AVColorTransferCharacteristic trc);
+
+/**
+ * Determine the function needed to apply the given
+ * AVColorTransferCharacteristic to linear input.
+ *
+ * The function returned should expect a nominal domain and range of [0.0-1.0]
+ * values outside of this range maybe valid depending on the chosen
+ * characteristic function.
+ *
+ * @return Will return pointer to the function matching the
+ *         supplied Transfer Characteristic. If unspecified will
+ *         return NULL:
+ */
+av_csp_trc_function av_csp_trc_func_from_id(enum AVColorTransferCharacteristic trc);
+
+/**
+ * Returns the mathematical inverse of the corresponding TRC function.
+ */
+av_csp_trc_function av_csp_trc_func_inv_from_id(enum AVColorTransferCharacteristic trc);
+
+/**
+ * Function pointer representing an ITU EOTF transfer for a given reference
+ * display configuration.
+ *
+ * @param Lw The white point luminance of the display, in nits (cd/m^2).
+ * @param Lb The black point luminance of the display, in nits (cd/m^2).
+ */
+typedef void (*av_csp_eotf_function)(double Lw, double Lb, double c[3]);
+
+/**
+ * Returns the ITU EOTF corresponding to a given TRC. This converts from the
+ * signal level [0,1] to the raw output display luminance in nits (cd/m^2).
+ * This is done per channel in RGB space, except for AVCOL_TRC_SMPTE428, which
+ * assumes CIE XYZ in- and output.
+ *
+ * @return A pointer to the function implementing the given TRC, or NULL if no
+ *         such function is defined.
+ *
+ * @note In general, the resulting function is defined (wherever possible) for
+ *       out-of-range values, even though these values do not have a physical
+ *       meaning on the given display. Users should clamp inputs (or outputs)
+ *       if this behavior is not desired.
+ *
+ *       This is also the case for functions like PQ, which are defined over an
+ *       absolute signal range independent of the target display capabilities.
+ */
+av_csp_eotf_function av_csp_itu_eotf(enum AVColorTransferCharacteristic trc);
+
+/**
+ * Returns the mathematical inverse of the corresponding EOTF.
+ */
+av_csp_eotf_function av_csp_itu_eotf_inv(enum AVColorTransferCharacteristic trc);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_CSP_H */

ffmpeg/include/libavutil/des.h

@@ -0,0 +1,81 @@
+/*
+ * DES encryption/decryption
+ * Copyright (c) 2007 Reimar Doeffinger
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_DES_H
+#define AVUTIL_DES_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_des DES
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+typedef struct AVDES {
+    uint64_t round_keys[3][16];
+    int triple_des;
+} AVDES;
+
+/**
+ * Allocate an AVDES context.
+ */
+AVDES *av_des_alloc(void);
+
+/**
+ * @brief Initializes an AVDES context.
+ *
+ * @param d pointer to a AVDES structure to initialize
+ * @param key pointer to the key to use
+ * @param key_bits must be 64 or 192
+ * @param decrypt 0 for encryption/CBC-MAC, 1 for decryption
+ * @return zero on success, negative value otherwise
+ */
+int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt);
+
+/**
+ * @brief Encrypts / decrypts using the DES algorithm.
+ *
+ * @param d pointer to the AVDES structure
+ * @param dst destination array, can be equal to src, must be 8-byte aligned
+ * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
+ * @param count number of 8 byte blocks
+ * @param iv initialization vector for CBC mode, if NULL then ECB will be used,
+ *           must be 8-byte aligned
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
+
+/**
+ * @brief Calculates CBC-MAC using the DES algorithm.
+ *
+ * @param d pointer to the AVDES structure
+ * @param dst destination array, can be equal to src, must be 8-byte aligned
+ * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
+ * @param count number of 8 byte blocks
+ */
+void av_des_mac(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DES_H */

ffmpeg/include/libavutil/detection_bbox.h

@@ -0,0 +1,108 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_DETECTION_BBOX_H
+#define AVUTIL_DETECTION_BBOX_H
+
+#include "rational.h"
+#include "avassert.h"
+#include "frame.h"
+
+typedef struct AVDetectionBBox {
+    /**
+     * Distance in pixels from the left/top edge of the frame,
+     * together with width and height, defining the bounding box.
+     */
+    int x;
+    int y;
+    int w;
+    int h;
+
+#define AV_DETECTION_BBOX_LABEL_NAME_MAX_SIZE 64
+
+    /**
+     * Detect result with confidence
+     */
+    char detect_label[AV_DETECTION_BBOX_LABEL_NAME_MAX_SIZE];
+    AVRational detect_confidence;
+
+    /**
+     * At most 4 classifications based on the detected bounding box.
+     * For example, we can get max 4 different attributes with 4 different
+     * DNN models on one bounding box.
+     * classify_count is zero if no classification.
+     */
+#define AV_NUM_DETECTION_BBOX_CLASSIFY 4
+    uint32_t classify_count;
+    char classify_labels[AV_NUM_DETECTION_BBOX_CLASSIFY][AV_DETECTION_BBOX_LABEL_NAME_MAX_SIZE];
+    AVRational classify_confidences[AV_NUM_DETECTION_BBOX_CLASSIFY];
+} AVDetectionBBox;
+
+typedef struct AVDetectionBBoxHeader {
+    /**
+     * Information about how the bounding box is generated.
+     * for example, the DNN model name.
+     */
+    char source[256];
+
+    /**
+     * Number of bounding boxes in the array.
+     */
+    uint32_t nb_bboxes;
+
+    /**
+     * Offset in bytes from the beginning of this structure at which
+     * the array of bounding boxes starts.
+     */
+    size_t bboxes_offset;
+
+    /**
+     * Size of each bounding box in bytes.
+     */
+    size_t bbox_size;
+} AVDetectionBBoxHeader;
+
+/*
+ * Get the bounding box at the specified {@code idx}. Must be between 0 and nb_bboxes.
+ */
+static av_always_inline AVDetectionBBox *
+av_get_detection_bbox(const AVDetectionBBoxHeader *header, unsigned int idx)
+{
+    av_assert0(idx < header->nb_bboxes);
+    return (AVDetectionBBox *)((uint8_t *)header + header->bboxes_offset +
+                               idx * header->bbox_size);
+}
+
+/**
+ * Allocates memory for AVDetectionBBoxHeader, plus an array of {@code nb_bboxes}
+ * AVDetectionBBox, and initializes the variables.
+ * Can be freed with a normal av_free() call.
+ *
+ * @param nb_bboxes number of AVDetectionBBox structures to allocate
+ * @param out_size if non-NULL, the size in bytes of the resulting data array is
+ * written here.
+ */
+AVDetectionBBoxHeader *av_detection_bbox_alloc(uint32_t nb_bboxes, size_t *out_size);
+
+/**
+ * Allocates memory for AVDetectionBBoxHeader, plus an array of {@code nb_bboxes}
+ * AVDetectionBBox, in the given AVFrame {@code frame} as AVFrameSideData of type
+ * AV_FRAME_DATA_DETECTION_BBOXES and initializes the variables.
+ */
+AVDetectionBBoxHeader *av_detection_bbox_create_side_data(AVFrame *frame, uint32_t nb_bboxes);
+#endif

ffmpeg/include/libavutil/dict.h

@@ -0,0 +1,241 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Public dictionary API.
+ * @deprecated
+ *  AVDictionary is provided for compatibility with libav. It is both in
+ *  implementation as well as API inefficient. It does not scale and is
+ *  extremely slow with large dictionaries.
+ *  It is recommended that new code uses our tree container from tree.c/h
+ *  where applicable, which uses AVL trees to achieve O(log n) performance.
+ */
+
+#ifndef AVUTIL_DICT_H
+#define AVUTIL_DICT_H
+
+#include <stdint.h>
+
+/**
+ * @addtogroup lavu_dict AVDictionary
+ * @ingroup lavu_data
+ *
+ * @brief Simple key:value store
+ *
+ * @{
+ * Dictionaries are used for storing key-value pairs.
+ *
+ * - To **create an AVDictionary**, simply pass an address of a NULL
+ *   pointer to av_dict_set(). NULL can be used as an empty dictionary
+ *   wherever a pointer to an AVDictionary is required.
+ * - To **insert an entry**, use av_dict_set().
+ * - Use av_dict_get() to **retrieve an entry**.
+ * - To **iterate over all entries**, use av_dict_iterate().
+ * - In order to **free the dictionary and all its contents**, use av_dict_free().
+ *
+ @code
+   AVDictionary *d = NULL;           // "create" an empty dictionary
+   AVDictionaryEntry *t = NULL;
+
+   av_dict_set(&d, "foo", "bar", 0); // add an entry
+
+   char *k = av_strdup("key");       // if your strings are already allocated,
+   char *v = av_strdup("value");     // you can avoid copying them like this
+   av_dict_set(&d, k, v, AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
+
+   while ((t = av_dict_iterate(d, t))) {
+       <....>                        // iterate over all entries in d
+   }
+   av_dict_free(&d);
+ @endcode
+ */
+
+/**
+ * @name AVDictionary Flags
+ * Flags that influence behavior of the matching of keys or insertion to the dictionary.
+ * @{
+ */
+#define AV_DICT_MATCH_CASE      1   /**< Only get an entry with exact-case key match. Only relevant in av_dict_get(). */
+#define AV_DICT_IGNORE_SUFFIX   2   /**< Return first entry in a dictionary whose first part corresponds to the search key,
+                                         ignoring the suffix of the found key string. Only relevant in av_dict_get(). */
+#define AV_DICT_DONT_STRDUP_KEY 4   /**< Take ownership of a key that's been
+                                         allocated with av_malloc() or another memory allocation function. */
+#define AV_DICT_DONT_STRDUP_VAL 8   /**< Take ownership of a value that's been
+                                         allocated with av_malloc() or another memory allocation function. */
+#define AV_DICT_DONT_OVERWRITE 16   /**< Don't overwrite existing entries. */
+#define AV_DICT_APPEND         32   /**< If the entry already exists, append to it.  Note that no
+                                         delimiter is added, the strings are simply concatenated. */
+#define AV_DICT_MULTIKEY       64   /**< Allow to store several equal keys in the dictionary */
+/**
+ * @}
+ */
+
+typedef struct AVDictionaryEntry {
+    char *key;
+    char *value;
+} AVDictionaryEntry;
+
+typedef struct AVDictionary AVDictionary;
+
+/**
+ * Get a dictionary entry with matching key.
+ *
+ * The returned entry key or value must not be changed, or it will
+ * cause undefined behavior.
+ *
+ * @param prev  Set to the previous matching element to find the next.
+ *              If set to NULL the first matching element is returned.
+ * @param key   Matching key
+ * @param flags A collection of AV_DICT_* flags controlling how the
+ *              entry is retrieved
+ *
+ * @return      Found entry or NULL in case no matching entry was found in the dictionary
+ */
+AVDictionaryEntry *av_dict_get(const AVDictionary *m, const char *key,
+                               const AVDictionaryEntry *prev, int flags);
+
+/**
+ * Iterate over a dictionary
+ *
+ * Iterates through all entries in the dictionary.
+ *
+ * @warning The returned AVDictionaryEntry key/value must not be changed.
+ *
+ * @warning As av_dict_set() invalidates all previous entries returned
+ * by this function, it must not be called while iterating over the dict.
+ *
+ * Typical usage:
+ * @code
+ * const AVDictionaryEntry *e = NULL;
+ * while ((e = av_dict_iterate(m, e))) {
+ *     // ...
+ * }
+ * @endcode
+ *
+ * @param m     The dictionary to iterate over
+ * @param prev  Pointer to the previous AVDictionaryEntry, NULL initially
+ *
+ * @retval AVDictionaryEntry* The next element in the dictionary
+ * @retval NULL               No more elements in the dictionary
+ */
+const AVDictionaryEntry *av_dict_iterate(const AVDictionary *m,
+                                         const AVDictionaryEntry *prev);
+
+/**
+ * Get number of entries in dictionary.
+ *
+ * @param m dictionary
+ * @return  number of entries in dictionary
+ */
+int av_dict_count(const AVDictionary *m);
+
+/**
+ * Set the given entry in *pm, overwriting an existing entry.
+ *
+ * Note: If AV_DICT_DONT_STRDUP_KEY or AV_DICT_DONT_STRDUP_VAL is set,
+ * these arguments will be freed on error.
+ *
+ * @warning Adding a new entry to a dictionary invalidates all existing entries
+ * previously returned with av_dict_get() or av_dict_iterate().
+ *
+ * @param pm        Pointer to a pointer to a dictionary struct. If *pm is NULL
+ *                  a dictionary struct is allocated and put in *pm.
+ * @param key       Entry key to add to *pm (will either be av_strduped or added as a new key depending on flags)
+ * @param value     Entry value to add to *pm (will be av_strduped or added as a new key depending on flags).
+ *                  Passing a NULL value will cause an existing entry to be deleted.
+ *
+ * @return          >= 0 on success otherwise an error code <0
+ */
+int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags);
+
+/**
+ * Convenience wrapper for av_dict_set() that converts the value to a string
+ * and stores it.
+ *
+ * Note: If ::AV_DICT_DONT_STRDUP_KEY is set, key will be freed on error.
+ */
+int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags);
+
+/**
+ * Parse the key/value pairs list and add the parsed entries to a dictionary.
+ *
+ * In case of failure, all the successfully set entries are stored in
+ * *pm. You may need to manually free the created dictionary.
+ *
+ * @param key_val_sep  A 0-terminated list of characters used to separate
+ *                     key from value
+ * @param pairs_sep    A 0-terminated list of characters used to separate
+ *                     two pairs from each other
+ * @param flags        Flags to use when adding to the dictionary.
+ *                     ::AV_DICT_DONT_STRDUP_KEY and ::AV_DICT_DONT_STRDUP_VAL
+ *                     are ignored since the key/value tokens will always
+ *                     be duplicated.
+ *
+ * @return             0 on success, negative AVERROR code on failure
+ */
+int av_dict_parse_string(AVDictionary **pm, const char *str,
+                         const char *key_val_sep, const char *pairs_sep,
+                         int flags);
+
+/**
+ * Copy entries from one AVDictionary struct into another.
+ *
+ * @note Metadata is read using the ::AV_DICT_IGNORE_SUFFIX flag
+ *
+ * @param dst   Pointer to a pointer to a AVDictionary struct to copy into. If *dst is NULL,
+ *              this function will allocate a struct for you and put it in *dst
+ * @param src   Pointer to the source AVDictionary struct to copy items from.
+ * @param flags Flags to use when setting entries in *dst
+ *
+ * @return 0 on success, negative AVERROR code on failure. If dst was allocated
+ *           by this function, callers should free the associated memory.
+ */
+int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags);
+
+/**
+ * Free all the memory allocated for an AVDictionary struct
+ * and all keys and values.
+ */
+void av_dict_free(AVDictionary **m);
+
+/**
+ * Get dictionary entries as a string.
+ *
+ * Create a string containing dictionary's entries.
+ * Such string may be passed back to av_dict_parse_string().
+ * @note String is escaped with backslashes ('\').
+ *
+ * @warning Separators cannot be neither '\\' nor '\0'. They also cannot be the same.
+ *
+ * @param[in]  m             The dictionary
+ * @param[out] buffer        Pointer to buffer that will be allocated with string containg entries.
+ *                           Buffer must be freed by the caller when is no longer needed.
+ * @param[in]  key_val_sep   Character used to separate key from value
+ * @param[in]  pairs_sep     Character used to separate two pairs from each other
+ *
+ * @return                   >= 0 on success, negative on error
+ */
+int av_dict_get_string(const AVDictionary *m, char **buffer,
+                       const char key_val_sep, const char pairs_sep);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DICT_H */

ffmpeg/include/libavutil/display.h

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2014 Vittorio Giovara <vittorio.giovara@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_video_display
+ * Display matrix
+ */
+
+#ifndef AVUTIL_DISPLAY_H
+#define AVUTIL_DISPLAY_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_video_display Display transformation matrix functions
+ * @ingroup lavu_video
+ *
+ * The display transformation matrix specifies an affine transformation that
+ * should be applied to video frames for correct presentation. It is compatible
+ * with the matrices stored in the ISO/IEC 14496-12 container format.
+ *
+ * The data is a 3x3 matrix represented as a 9-element array:
+ *
+ * @code{.unparsed}
+ *                                  | a b u |
+ *   (a, b, u, c, d, v, x, y, w) -> | c d v |
+ *                                  | x y w |
+ * @endcode
+ *
+ * All numbers are stored in native endianness, as 16.16 fixed-point values,
+ * except for u, v and w, which are stored as 2.30 fixed-point values.
+ *
+ * The transformation maps a point (p, q) in the source (pre-transformation)
+ * frame to the point (p', q') in the destination (post-transformation) frame as
+ * follows:
+ *
+ * @code{.unparsed}
+ *               | a b u |
+ *   (p, q, 1) . | c d v | = z * (p', q', 1)
+ *               | x y w |
+ * @endcode
+ *
+ * The transformation can also be more explicitly written in components as
+ * follows:
+ *
+ * @code{.unparsed}
+ *   p' = (a * p + c * q + x) / z;
+ *   q' = (b * p + d * q + y) / z;
+ *   z  =  u * p + v * q + w
+ * @endcode
+ *
+ * @{
+ */
+
+/**
+ * Extract the rotation component of the transformation matrix.
+ *
+ * @param matrix the transformation matrix
+ * @return the angle (in degrees) by which the transformation rotates the frame
+ *         counterclockwise. The angle will be in range [-180.0, 180.0],
+ *         or NaN if the matrix is singular.
+ *
+ * @note floating point numbers are inherently inexact, so callers are
+ *       recommended to round the return value to nearest integer before use.
+ */
+double av_display_rotation_get(const int32_t matrix[9]);
+
+/**
+ * Initialize a transformation matrix describing a pure clockwise
+ * rotation by the specified angle (in degrees).
+ *
+ * @param[out] matrix a transformation matrix (will be fully overwritten
+ *                    by this function)
+ * @param angle rotation angle in degrees.
+ */
+void av_display_rotation_set(int32_t matrix[9], double angle);
+
+/**
+ * Flip the input matrix horizontally and/or vertically.
+ *
+ * @param[in,out] matrix a transformation matrix
+ * @param hflip whether the matrix should be flipped horizontally
+ * @param vflip whether the matrix should be flipped vertically
+ */
+void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DISPLAY_H */

ffmpeg/include/libavutil/dovi_meta.h

@@ -0,0 +1,396 @@
+/*
+ * Copyright (c) 2020 Vacing Fang <vacingfang@tencent.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * DOVI configuration
+ */
+
+
+#ifndef AVUTIL_DOVI_META_H
+#define AVUTIL_DOVI_META_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include "rational.h"
+#include "csp.h"
+
+/*
+ * DOVI configuration
+ * ref: dolby-vision-bitstreams-within-the-iso-base-media-file-format-v2.1.2
+        dolby-vision-bitstreams-in-mpeg-2-transport-stream-multiplex-v1.2
+ * @code
+ * uint8_t  dv_version_major, the major version number that the stream complies with
+ * uint8_t  dv_version_minor, the minor version number that the stream complies with
+ * uint8_t  dv_profile, the Dolby Vision profile
+ * uint8_t  dv_level, the Dolby Vision level
+ * uint8_t  rpu_present_flag
+ * uint8_t  el_present_flag
+ * uint8_t  bl_present_flag
+ * uint8_t  dv_bl_signal_compatibility_id
+ * uint8_t  dv_md_compression, the compression method in use
+ * @endcode
+ *
+ * @note The struct must be allocated with av_dovi_alloc() and
+ *       its size is not a part of the public ABI.
+ */
+typedef struct AVDOVIDecoderConfigurationRecord {
+    uint8_t dv_version_major;
+    uint8_t dv_version_minor;
+    uint8_t dv_profile;
+    uint8_t dv_level;
+    uint8_t rpu_present_flag;
+    uint8_t el_present_flag;
+    uint8_t bl_present_flag;
+    uint8_t dv_bl_signal_compatibility_id;
+    uint8_t dv_md_compression;
+} AVDOVIDecoderConfigurationRecord;
+
+enum AVDOVICompression {
+    AV_DOVI_COMPRESSION_NONE     = 0,
+    AV_DOVI_COMPRESSION_LIMITED  = 1,
+    AV_DOVI_COMPRESSION_RESERVED = 2,
+    AV_DOVI_COMPRESSION_EXTENDED = 3,
+};
+
+/**
+ * Allocate a AVDOVIDecoderConfigurationRecord structure and initialize its
+ * fields to default values.
+ *
+ * @return the newly allocated struct or NULL on failure
+ */
+AVDOVIDecoderConfigurationRecord *av_dovi_alloc(size_t *size);
+
+/**
+ * Dolby Vision RPU data header.
+ *
+ * @note sizeof(AVDOVIRpuDataHeader) is not part of the public ABI.
+ */
+typedef struct AVDOVIRpuDataHeader {
+    uint8_t rpu_type;
+    uint16_t rpu_format;
+    uint8_t vdr_rpu_profile;
+    uint8_t vdr_rpu_level;
+    uint8_t chroma_resampling_explicit_filter_flag;
+    uint8_t coef_data_type; /* informative, lavc always converts to fixed */
+    uint8_t coef_log2_denom;
+    uint8_t vdr_rpu_normalized_idc;
+    uint8_t bl_video_full_range_flag;
+    uint8_t bl_bit_depth; /* [8, 16] */
+    uint8_t el_bit_depth; /* [8, 16] */
+    uint8_t vdr_bit_depth; /* [8, 16] */
+    uint8_t spatial_resampling_filter_flag;
+    uint8_t el_spatial_resampling_filter_flag;
+    uint8_t disable_residual_flag;
+    uint8_t ext_mapping_idc_0_4; /* extended base layer inverse mapping indicator */
+    uint8_t ext_mapping_idc_5_7; /* reserved */
+} AVDOVIRpuDataHeader;
+
+enum AVDOVIMappingMethod {
+    AV_DOVI_MAPPING_POLYNOMIAL = 0,
+    AV_DOVI_MAPPING_MMR = 1,
+};
+
+/**
+ * Coefficients of a piece-wise function. The pieces of the function span the
+ * value ranges between two adjacent pivot values.
+ */
+#define AV_DOVI_MAX_PIECES 8
+typedef struct AVDOVIReshapingCurve {
+    uint8_t num_pivots;                         /* [2, 9] */
+    uint16_t pivots[AV_DOVI_MAX_PIECES + 1];    /* sorted ascending */
+    enum AVDOVIMappingMethod mapping_idc[AV_DOVI_MAX_PIECES];
+    /* AV_DOVI_MAPPING_POLYNOMIAL */
+    uint8_t poly_order[AV_DOVI_MAX_PIECES];     /* [1, 2] */
+    int64_t poly_coef[AV_DOVI_MAX_PIECES][3];   /* x^0, x^1, x^2 */
+    /* AV_DOVI_MAPPING_MMR */
+    uint8_t mmr_order[AV_DOVI_MAX_PIECES];      /* [1, 3] */
+    int64_t mmr_constant[AV_DOVI_MAX_PIECES];
+    int64_t mmr_coef[AV_DOVI_MAX_PIECES][3/* order - 1 */][7];
+} AVDOVIReshapingCurve;
+
+enum AVDOVINLQMethod {
+    AV_DOVI_NLQ_NONE = -1,
+    AV_DOVI_NLQ_LINEAR_DZ = 0,
+};
+
+/**
+ * Coefficients of the non-linear inverse quantization. For the interpretation
+ * of these, see ETSI GS CCM 001.
+ */
+typedef struct AVDOVINLQParams {
+    uint16_t nlq_offset;
+    uint64_t vdr_in_max;
+    /* AV_DOVI_NLQ_LINEAR_DZ */
+    uint64_t linear_deadzone_slope;
+    uint64_t linear_deadzone_threshold;
+} AVDOVINLQParams;
+
+/**
+ * Dolby Vision RPU data mapping parameters.
+ *
+ * @note sizeof(AVDOVIDataMapping) is not part of the public ABI.
+ */
+typedef struct AVDOVIDataMapping {
+    uint8_t vdr_rpu_id;
+    uint8_t mapping_color_space;
+    uint8_t mapping_chroma_format_idc;
+    AVDOVIReshapingCurve curves[3]; /* per component */
+
+    /* Non-linear inverse quantization */
+    enum AVDOVINLQMethod nlq_method_idc;
+    uint32_t num_x_partitions;
+    uint32_t num_y_partitions;
+    AVDOVINLQParams nlq[3]; /* per component */
+    uint16_t nlq_pivots[2];
+} AVDOVIDataMapping;
+
+/**
+ * Dolby Vision RPU colorspace metadata parameters.
+ *
+ * @note sizeof(AVDOVIColorMetadata) is not part of the public ABI.
+ */
+typedef struct AVDOVIColorMetadata {
+    uint8_t dm_metadata_id;
+    uint8_t scene_refresh_flag;
+
+    /**
+     * Coefficients of the custom Dolby Vision IPT-PQ matrices. These are to be
+     * used instead of the matrices indicated by the frame's colorspace tags.
+     * The output of rgb_to_lms_matrix is to be fed into a BT.2020 LMS->RGB
+     * matrix based on a Hunt-Pointer-Estevez transform, but without any
+     * crosstalk. (See the definition of the ICtCp colorspace for more
+     * information.)
+     */
+    AVRational ycc_to_rgb_matrix[9]; /* before PQ linearization */
+    AVRational ycc_to_rgb_offset[3]; /* input offset of neutral value */
+    AVRational rgb_to_lms_matrix[9]; /* after PQ linearization */
+
+    /**
+     * Extra signal metadata (see Dolby patents for more info).
+     */
+    uint16_t signal_eotf;
+    uint16_t signal_eotf_param0;
+    uint16_t signal_eotf_param1;
+    uint32_t signal_eotf_param2;
+    uint8_t signal_bit_depth;
+    uint8_t signal_color_space;
+    uint8_t signal_chroma_format;
+    uint8_t signal_full_range_flag; /* [0, 3] */
+    uint16_t source_min_pq;
+    uint16_t source_max_pq;
+    uint16_t source_diagonal;
+} AVDOVIColorMetadata;
+
+typedef struct AVDOVIDmLevel1 {
+    /* Per-frame brightness metadata */
+    uint16_t min_pq;
+    uint16_t max_pq;
+    uint16_t avg_pq;
+} AVDOVIDmLevel1;
+
+typedef struct AVDOVIDmLevel2 {
+    /* Usually derived from level 8 (at different levels) */
+    uint16_t target_max_pq;
+    uint16_t trim_slope;
+    uint16_t trim_offset;
+    uint16_t trim_power;
+    uint16_t trim_chroma_weight;
+    uint16_t trim_saturation_gain;
+    int16_t ms_weight;
+} AVDOVIDmLevel2;
+
+typedef struct AVDOVIDmLevel3 {
+    uint16_t min_pq_offset;
+    uint16_t max_pq_offset;
+    uint16_t avg_pq_offset;
+} AVDOVIDmLevel3;
+
+typedef struct AVDOVIDmLevel4 {
+    uint16_t anchor_pq;
+    uint16_t anchor_power;
+} AVDOVIDmLevel4;
+
+typedef struct AVDOVIDmLevel5 {
+    /* Active area definition */
+    uint16_t left_offset;
+    uint16_t right_offset;
+    uint16_t top_offset;
+    uint16_t bottom_offset;
+} AVDOVIDmLevel5;
+
+typedef struct AVDOVIDmLevel6 {
+    /* Static HDR10 metadata */
+    uint16_t max_luminance;
+    uint16_t min_luminance;
+    uint16_t max_cll;
+    uint16_t max_fall;
+} AVDOVIDmLevel6;
+
+typedef struct AVDOVIDmLevel8 {
+    /* Extended version of level 2 */
+    uint8_t target_display_index;
+    uint16_t trim_slope;
+    uint16_t trim_offset;
+    uint16_t trim_power;
+    uint16_t trim_chroma_weight;
+    uint16_t trim_saturation_gain;
+    uint16_t ms_weight;
+    uint16_t target_mid_contrast;
+    uint16_t clip_trim;
+    uint8_t saturation_vector_field[6];
+    uint8_t hue_vector_field[6];
+} AVDOVIDmLevel8;
+
+typedef struct AVDOVIDmLevel9 {
+    /* Source display characteristics */
+    uint8_t source_primary_index;
+    AVColorPrimariesDesc source_display_primaries;
+} AVDOVIDmLevel9;
+
+typedef struct AVDOVIDmLevel10 {
+    /* Target display characteristics */
+    uint8_t target_display_index;
+    uint16_t target_max_pq;
+    uint16_t target_min_pq;
+    uint8_t target_primary_index;
+    AVColorPrimariesDesc target_display_primaries;
+} AVDOVIDmLevel10;
+
+typedef struct AVDOVIDmLevel11 {
+    uint8_t content_type;
+    uint8_t whitepoint;
+    uint8_t reference_mode_flag;
+    uint8_t sharpness;
+    uint8_t noise_reduction;
+    uint8_t mpeg_noise_reduction;
+    uint8_t frame_rate_conversion;
+    uint8_t brightness;
+    uint8_t color;
+} AVDOVIDmLevel11;
+
+typedef struct AVDOVIDmLevel254 {
+    /* DMv2 info block, always present in samples with DMv2 metadata */
+    uint8_t dm_mode;
+    uint8_t dm_version_index;
+} AVDOVIDmLevel254;
+
+typedef struct AVDOVIDmLevel255 {
+    /* Debug block, not really used in samples */
+    uint8_t dm_run_mode;
+    uint8_t dm_run_version;
+    uint8_t dm_debug[4];
+} AVDOVIDmLevel255;
+
+/**
+ * Dolby Vision metadata extension block. Dynamic extension blocks may change
+ * from frame to frame, while static blocks are constant throughout the entire
+ * sequence.
+ *
+ * @note sizeof(AVDOVIDmData) is not part of the public API.
+ */
+typedef struct AVDOVIDmData {
+    uint8_t level; /* [1, 255] */
+    union {
+        AVDOVIDmLevel1 l1; /* dynamic */
+        AVDOVIDmLevel2 l2; /* dynamic, may appear multiple times */
+        AVDOVIDmLevel3 l3; /* dynamic */
+        AVDOVIDmLevel4 l4; /* dynamic */
+        AVDOVIDmLevel5 l5; /* dynamic */
+        AVDOVIDmLevel6 l6; /* static */
+        /* level 7 is currently unused */
+        AVDOVIDmLevel8 l8; /* dynamic, may appear multiple times */
+        AVDOVIDmLevel9 l9; /* dynamic */
+        AVDOVIDmLevel10 l10; /* static, may appear multiple times */
+        AVDOVIDmLevel11 l11; /* dynamic */
+        AVDOVIDmLevel254 l254; /* static */
+        AVDOVIDmLevel255 l255; /* static */
+    };
+} AVDOVIDmData;
+
+/**
+ * Combined struct representing a combination of header, mapping and color
+ * metadata, for attaching to frames as side data.
+ *
+ * @note The struct must be allocated with av_dovi_metadata_alloc() and
+ *       its size is not a part of the public ABI.
+ */
+
+typedef struct AVDOVIMetadata {
+    /**
+     * Offset in bytes from the beginning of this structure at which the
+     * respective structs start.
+     */
+    size_t header_offset;   /* AVDOVIRpuDataHeader */
+    size_t mapping_offset;  /* AVDOVIDataMapping */
+    size_t color_offset;    /* AVDOVIColorMetadata */
+
+    size_t ext_block_offset; /* offset to start of ext blocks array */
+    size_t ext_block_size; /* size per element */
+    int num_ext_blocks; /* number of extension blocks */
+
+    /* static limit on num_ext_blocks, derived from bitstream limitations */
+#define AV_DOVI_MAX_EXT_BLOCKS 32
+} AVDOVIMetadata;
+
+static av_always_inline AVDOVIRpuDataHeader *
+av_dovi_get_header(const AVDOVIMetadata *data)
+{
+    return (AVDOVIRpuDataHeader *)((uint8_t *) data + data->header_offset);
+}
+
+static av_always_inline AVDOVIDataMapping *
+av_dovi_get_mapping(const AVDOVIMetadata *data)
+{
+    return (AVDOVIDataMapping *)((uint8_t *) data + data->mapping_offset);
+}
+
+static av_always_inline AVDOVIColorMetadata *
+av_dovi_get_color(const AVDOVIMetadata *data)
+{
+    return (AVDOVIColorMetadata *)((uint8_t *) data + data->color_offset);
+}
+
+static av_always_inline AVDOVIDmData *
+av_dovi_get_ext(const AVDOVIMetadata *data, int index)
+{
+    return (AVDOVIDmData *)((uint8_t *) data + data->ext_block_offset +
+                            data->ext_block_size * index);
+}
+
+/**
+ * Find an extension block with a given level, or NULL. In the case of
+ * multiple extension blocks, only the first is returned.
+ */
+AVDOVIDmData *av_dovi_find_level(const AVDOVIMetadata *data, uint8_t level);
+
+/**
+ * Allocate an AVDOVIMetadata structure and initialize its
+ * fields to default values.
+ *
+ * @param size If this parameter is non-NULL, the size in bytes of the
+ *             allocated struct will be written here on success
+ *
+ * @return the newly allocated struct or NULL on failure
+ */
+AVDOVIMetadata *av_dovi_metadata_alloc(size_t *size);
+
+#endif /* AVUTIL_DOVI_META_H */

ffmpeg/include/libavutil/downmix_info.h

@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2014 Tim Walker <tdskywalker@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_DOWNMIX_INFO_H
+#define AVUTIL_DOWNMIX_INFO_H
+
+#include "frame.h"
+
+/**
+ * @file
+ * audio downmix medatata
+ */
+
+/**
+ * @addtogroup lavu_audio
+ * @{
+ */
+
+/**
+ * @defgroup downmix_info Audio downmix metadata
+ * @{
+ */
+
+/**
+ * Possible downmix types.
+ */
+enum AVDownmixType {
+    AV_DOWNMIX_TYPE_UNKNOWN, /**< Not indicated. */
+    AV_DOWNMIX_TYPE_LORO,    /**< Lo/Ro 2-channel downmix (Stereo). */
+    AV_DOWNMIX_TYPE_LTRT,    /**< Lt/Rt 2-channel downmix, Dolby Surround compatible. */
+    AV_DOWNMIX_TYPE_DPLII,   /**< Lt/Rt 2-channel downmix, Dolby Pro Logic II compatible. */
+    AV_DOWNMIX_TYPE_NB       /**< Number of downmix types. Not part of ABI. */
+};
+
+/**
+ * This structure describes optional metadata relevant to a downmix procedure.
+ *
+ * All fields are set by the decoder to the value indicated in the audio
+ * bitstream (if present), or to a "sane" default otherwise.
+ */
+typedef struct AVDownmixInfo {
+    /**
+     * Type of downmix preferred by the mastering engineer.
+     */
+    enum AVDownmixType preferred_downmix_type;
+
+    /**
+     * Absolute scale factor representing the nominal level of the center
+     * channel during a regular downmix.
+     */
+    double center_mix_level;
+
+    /**
+     * Absolute scale factor representing the nominal level of the center
+     * channel during an Lt/Rt compatible downmix.
+     */
+    double center_mix_level_ltrt;
+
+    /**
+     * Absolute scale factor representing the nominal level of the surround
+     * channels during a regular downmix.
+     */
+    double surround_mix_level;
+
+    /**
+     * Absolute scale factor representing the nominal level of the surround
+     * channels during an Lt/Rt compatible downmix.
+     */
+    double surround_mix_level_ltrt;
+
+    /**
+     * Absolute scale factor representing the level at which the LFE data is
+     * mixed into L/R channels during downmixing.
+     */
+    double lfe_mix_level;
+} AVDownmixInfo;
+
+/**
+ * Get a frame's AV_FRAME_DATA_DOWNMIX_INFO side data for editing.
+ *
+ * If the side data is absent, it is created and added to the frame.
+ *
+ * @param frame the frame for which the side data is to be obtained or created
+ *
+ * @return the AVDownmixInfo structure to be edited by the caller, or NULL if
+ *         the structure cannot be allocated.
+ */
+AVDownmixInfo *av_downmix_info_update_side_data(AVFrame *frame);
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DOWNMIX_INFO_H */

ffmpeg/include/libavutil/encryption_info.h

@@ -0,0 +1,205 @@
+/**
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ENCRYPTION_INFO_H
+#define AVUTIL_ENCRYPTION_INFO_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+typedef struct AVSubsampleEncryptionInfo {
+    /** The number of bytes that are clear. */
+    unsigned int bytes_of_clear_data;
+
+    /**
+     * The number of bytes that are protected.  If using pattern encryption,
+     * the pattern applies to only the protected bytes; if not using pattern
+     * encryption, all these bytes are encrypted.
+     */
+    unsigned int bytes_of_protected_data;
+} AVSubsampleEncryptionInfo;
+
+/**
+ * This describes encryption info for a packet.  This contains frame-specific
+ * info for how to decrypt the packet before passing it to the decoder.
+ *
+ * The size of this struct is not part of the public ABI.
+ */
+typedef struct AVEncryptionInfo {
+    /** The fourcc encryption scheme, in big-endian byte order. */
+    uint32_t scheme;
+
+    /**
+     * Only used for pattern encryption.  This is the number of 16-byte blocks
+     * that are encrypted.
+     */
+    uint32_t crypt_byte_block;
+
+    /**
+     * Only used for pattern encryption.  This is the number of 16-byte blocks
+     * that are clear.
+     */
+    uint32_t skip_byte_block;
+
+    /**
+     * The ID of the key used to encrypt the packet.  This should always be
+     * 16 bytes long, but may be changed in the future.
+     */
+    uint8_t *key_id;
+    uint32_t key_id_size;
+
+    /**
+     * The initialization vector.  This may have been zero-filled to be the
+     * correct block size.  This should always be 16 bytes long, but may be
+     * changed in the future.
+     */
+    uint8_t *iv;
+    uint32_t iv_size;
+
+    /**
+     * An array of subsample encryption info specifying how parts of the sample
+     * are encrypted.  If there are no subsamples, then the whole sample is
+     * encrypted.
+     */
+    AVSubsampleEncryptionInfo *subsamples;
+    uint32_t subsample_count;
+} AVEncryptionInfo;
+
+/**
+ * This describes info used to initialize an encryption key system.
+ *
+ * The size of this struct is not part of the public ABI.
+ */
+typedef struct AVEncryptionInitInfo {
+    /**
+     * A unique identifier for the key system this is for, can be NULL if it
+     * is not known.  This should always be 16 bytes, but may change in the
+     * future.
+     */
+    uint8_t* system_id;
+    uint32_t system_id_size;
+
+    /**
+     * An array of key IDs this initialization data is for.  All IDs are the
+     * same length.  Can be NULL if there are no known key IDs.
+     */
+    uint8_t** key_ids;
+    /** The number of key IDs. */
+    uint32_t num_key_ids;
+    /**
+     * The number of bytes in each key ID.  This should always be 16, but may
+     * change in the future.
+     */
+    uint32_t key_id_size;
+
+    /**
+     * Key-system specific initialization data.  This data is copied directly
+     * from the file and the format depends on the specific key system.  This
+     * can be NULL if there is no initialization data; in that case, there
+     * will be at least one key ID.
+     */
+    uint8_t* data;
+    uint32_t data_size;
+
+    /**
+     * An optional pointer to the next initialization info in the list.
+     */
+    struct AVEncryptionInitInfo *next;
+} AVEncryptionInitInfo;
+
+/**
+ * Allocates an AVEncryptionInfo structure and sub-pointers to hold the given
+ * number of subsamples.  This will allocate pointers for the key ID, IV,
+ * and subsample entries, set the size members, and zero-initialize the rest.
+ *
+ * @param subsample_count The number of subsamples.
+ * @param key_id_size The number of bytes in the key ID, should be 16.
+ * @param iv_size The number of bytes in the IV, should be 16.
+ *
+ * @return The new AVEncryptionInfo structure, or NULL on error.
+ */
+AVEncryptionInfo *av_encryption_info_alloc(uint32_t subsample_count, uint32_t key_id_size, uint32_t iv_size);
+
+/**
+ * Allocates an AVEncryptionInfo structure with a copy of the given data.
+ * @return The new AVEncryptionInfo structure, or NULL on error.
+ */
+AVEncryptionInfo *av_encryption_info_clone(const AVEncryptionInfo *info);
+
+/**
+ * Frees the given encryption info object.  This MUST NOT be used to free the
+ * side-data data pointer, that should use normal side-data methods.
+ */
+void av_encryption_info_free(AVEncryptionInfo *info);
+
+/**
+ * Creates a copy of the AVEncryptionInfo that is contained in the given side
+ * data.  The resulting object should be passed to av_encryption_info_free()
+ * when done.
+ *
+ * @return The new AVEncryptionInfo structure, or NULL on error.
+ */
+AVEncryptionInfo *av_encryption_info_get_side_data(const uint8_t *side_data, size_t side_data_size);
+
+/**
+ * Allocates and initializes side data that holds a copy of the given encryption
+ * info.  The resulting pointer should be either freed using av_free or given
+ * to av_packet_add_side_data().
+ *
+ * @return The new side-data pointer, or NULL.
+ */
+uint8_t *av_encryption_info_add_side_data(
+      const AVEncryptionInfo *info, size_t *side_data_size);
+
+
+/**
+ * Allocates an AVEncryptionInitInfo structure and sub-pointers to hold the
+ * given sizes.  This will allocate pointers and set all the fields.
+ *
+ * @return The new AVEncryptionInitInfo structure, or NULL on error.
+ */
+AVEncryptionInitInfo *av_encryption_init_info_alloc(
+    uint32_t system_id_size, uint32_t num_key_ids, uint32_t key_id_size, uint32_t data_size);
+
+/**
+ * Frees the given encryption init info object.  This MUST NOT be used to free
+ * the side-data data pointer, that should use normal side-data methods.
+ */
+void av_encryption_init_info_free(AVEncryptionInitInfo* info);
+
+/**
+ * Creates a copy of the AVEncryptionInitInfo that is contained in the given
+ * side data.  The resulting object should be passed to
+ * av_encryption_init_info_free() when done.
+ *
+ * @return The new AVEncryptionInitInfo structure, or NULL on error.
+ */
+AVEncryptionInitInfo *av_encryption_init_info_get_side_data(
+    const uint8_t* side_data, size_t side_data_size);
+
+/**
+ * Allocates and initializes side data that holds a copy of the given encryption
+ * init info.  The resulting pointer should be either freed using av_free or
+ * given to av_packet_add_side_data().
+ *
+ * @return The new side-data pointer, or NULL.
+ */
+uint8_t *av_encryption_init_info_add_side_data(
+    const AVEncryptionInitInfo *info, size_t *side_data_size);
+
+#endif /* AVUTIL_ENCRYPTION_INFO_H */

ffmpeg/include/libavutil/error.h

@@ -0,0 +1,129 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * error code definitions
+ */
+
+#ifndef AVUTIL_ERROR_H
+#define AVUTIL_ERROR_H
+
+#include <errno.h>
+#include <stddef.h>
+
+#include "macros.h"
+
+/**
+ * @addtogroup lavu_error
+ *
+ * @{
+ */
+
+
+/* error handling */
+#if EDOM > 0
+#define AVERROR(e) (-(e))   ///< Returns a negative error code from a POSIX error code, to return from library functions.
+#define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value.
+#else
+/* Some platforms have E* and errno already negated. */
+#define AVERROR(e) (e)
+#define AVUNERROR(e) (e)
+#endif
+
+#define FFERRTAG(a, b, c, d) (-(int)MKTAG(a, b, c, d))
+
+#define AVERROR_BSF_NOT_FOUND      FFERRTAG(0xF8,'B','S','F') ///< Bitstream filter not found
+#define AVERROR_BUG                FFERRTAG( 'B','U','G','!') ///< Internal bug, also see AVERROR_BUG2
+#define AVERROR_BUFFER_TOO_SMALL   FFERRTAG( 'B','U','F','S') ///< Buffer too small
+#define AVERROR_DECODER_NOT_FOUND  FFERRTAG(0xF8,'D','E','C') ///< Decoder not found
+#define AVERROR_DEMUXER_NOT_FOUND  FFERRTAG(0xF8,'D','E','M') ///< Demuxer not found
+#define AVERROR_ENCODER_NOT_FOUND  FFERRTAG(0xF8,'E','N','C') ///< Encoder not found
+#define AVERROR_EOF                FFERRTAG( 'E','O','F',' ') ///< End of file
+#define AVERROR_EXIT               FFERRTAG( 'E','X','I','T') ///< Immediate exit was requested; the called function should not be restarted
+#define AVERROR_EXTERNAL           FFERRTAG( 'E','X','T',' ') ///< Generic error in an external library
+#define AVERROR_FILTER_NOT_FOUND   FFERRTAG(0xF8,'F','I','L') ///< Filter not found
+#define AVERROR_INVALIDDATA        FFERRTAG( 'I','N','D','A') ///< Invalid data found when processing input
+#define AVERROR_MUXER_NOT_FOUND    FFERRTAG(0xF8,'M','U','X') ///< Muxer not found
+#define AVERROR_OPTION_NOT_FOUND   FFERRTAG(0xF8,'O','P','T') ///< Option not found
+#define AVERROR_PATCHWELCOME       FFERRTAG( 'P','A','W','E') ///< Not yet implemented in FFmpeg, patches welcome
+#define AVERROR_PROTOCOL_NOT_FOUND FFERRTAG(0xF8,'P','R','O') ///< Protocol not found
+
+#define AVERROR_STREAM_NOT_FOUND   FFERRTAG(0xF8,'S','T','R') ///< Stream not found
+/**
+ * This is semantically identical to AVERROR_BUG
+ * it has been introduced in Libav after our AVERROR_BUG and with a modified value.
+ */
+#define AVERROR_BUG2               FFERRTAG( 'B','U','G',' ')
+#define AVERROR_UNKNOWN            FFERRTAG( 'U','N','K','N') ///< Unknown error, typically from an external library
+#define AVERROR_EXPERIMENTAL       (-0x2bb2afa8) ///< Requested feature is flagged experimental. Set strict_std_compliance if you really want to use it.
+#define AVERROR_INPUT_CHANGED      (-0x636e6701) ///< Input changed between calls. Reconfiguration is required. (can be OR-ed with AVERROR_OUTPUT_CHANGED)
+#define AVERROR_OUTPUT_CHANGED     (-0x636e6702) ///< Output changed between calls. Reconfiguration is required. (can be OR-ed with AVERROR_INPUT_CHANGED)
+/* HTTP & RTSP errors */
+#define AVERROR_HTTP_BAD_REQUEST   FFERRTAG(0xF8,'4','0','0')
+#define AVERROR_HTTP_UNAUTHORIZED  FFERRTAG(0xF8,'4','0','1')
+#define AVERROR_HTTP_FORBIDDEN     FFERRTAG(0xF8,'4','0','3')
+#define AVERROR_HTTP_NOT_FOUND     FFERRTAG(0xF8,'4','0','4')
+#define AVERROR_HTTP_TOO_MANY_REQUESTS FFERRTAG(0xF8,'4','2','9')
+#define AVERROR_HTTP_OTHER_4XX     FFERRTAG(0xF8,'4','X','X')
+#define AVERROR_HTTP_SERVER_ERROR  FFERRTAG(0xF8,'5','X','X')
+
+#define AV_ERROR_MAX_STRING_SIZE 64
+
+/**
+ * Put a description of the AVERROR code errnum in errbuf.
+ * In case of failure the global variable errno is set to indicate the
+ * error. Even in case of failure av_strerror() will print a generic
+ * error message indicating the errnum provided to errbuf.
+ *
+ * @param errnum      error code to describe
+ * @param errbuf      buffer to which description is written
+ * @param errbuf_size the size in bytes of errbuf
+ * @return 0 on success, a negative value if a description for errnum
+ * cannot be found
+ */
+int av_strerror(int errnum, char *errbuf, size_t errbuf_size);
+
+/**
+ * Fill the provided buffer with a string containing an error string
+ * corresponding to the AVERROR code errnum.
+ *
+ * @param errbuf         a buffer
+ * @param errbuf_size    size in bytes of errbuf
+ * @param errnum         error code to describe
+ * @return the buffer in input, filled with the error description
+ * @see av_strerror()
+ */
+static inline char *av_make_error_string(char *errbuf, size_t errbuf_size, int errnum)
+{
+    av_strerror(errnum, errbuf, errbuf_size);
+    return errbuf;
+}
+
+/**
+ * Convenience macro, the return value should be used only directly in
+ * function arguments but never stand-alone.
+ */
+#define av_err2str(errnum) \
+    av_make_error_string((char[AV_ERROR_MAX_STRING_SIZE]){0}, AV_ERROR_MAX_STRING_SIZE, errnum)
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_ERROR_H */

ffmpeg/include/libavutil/eval.h

@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * simple arithmetic expression evaluator
+ */
+
+#ifndef AVUTIL_EVAL_H
+#define AVUTIL_EVAL_H
+
+typedef struct AVExpr AVExpr;
+
+/**
+ * Parse and evaluate an expression.
+ * Note, this is significantly slower than av_expr_eval().
+ *
+ * @param res a pointer to a double where is put the result value of
+ * the expression, or NAN in case of error
+ * @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
+ * @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
+ * @param const_values a zero terminated array of values for the identifiers from const_names
+ * @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
+ * @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
+ * @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
+ * @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
+ * @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
+ * @param log_offset log level offset, can be used to silence error messages
+ * @param log_ctx parent logging context
+ * @return >= 0 in case of success, a negative value corresponding to an
+ * AVERROR code otherwise
+ */
+int av_expr_parse_and_eval(double *res, const char *s,
+                           const char * const *const_names, const double *const_values,
+                           const char * const *func1_names, double (* const *funcs1)(void *, double),
+                           const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+                           void *opaque, int log_offset, void *log_ctx);
+
+/**
+ * Parse an expression.
+ *
+ * @param expr a pointer where is put an AVExpr containing the parsed
+ * value in case of successful parsing, or NULL otherwise.
+ * The pointed to AVExpr must be freed with av_expr_free() by the user
+ * when it is not needed anymore.
+ * @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
+ * @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
+ * @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
+ * @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
+ * @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
+ * @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
+ * @param log_offset log level offset, can be used to silence error messages
+ * @param log_ctx parent logging context
+ * @return >= 0 in case of success, a negative value corresponding to an
+ * AVERROR code otherwise
+ */
+int av_expr_parse(AVExpr **expr, const char *s,
+                  const char * const *const_names,
+                  const char * const *func1_names, double (* const *funcs1)(void *, double),
+                  const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+                  int log_offset, void *log_ctx);
+
+/**
+ * Evaluate a previously parsed expression.
+ *
+ * @param e the AVExpr to evaluate
+ * @param const_values a zero terminated array of values for the identifiers from av_expr_parse() const_names
+ * @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
+ * @return the value of the expression
+ */
+double av_expr_eval(AVExpr *e, const double *const_values, void *opaque);
+
+/**
+ * Track the presence of variables and their number of occurrences in a parsed expression
+ *
+ * @param e the AVExpr to track variables in
+ * @param counter a zero-initialized array where the count of each variable will be stored
+ * @param size size of array
+ * @return 0 on success, a negative value indicates that no expression or array was passed
+ * or size was zero
+ */
+int av_expr_count_vars(AVExpr *e, unsigned *counter, int size);
+
+/**
+ * Track the presence of user provided functions and their number of occurrences
+ * in a parsed expression.
+ *
+ * @param e the AVExpr to track user provided functions in
+ * @param counter a zero-initialized array where the count of each function will be stored
+ *                if you passed 5 functions with 2 arguments to av_expr_parse()
+ *                then for arg=2 this will use up to 5 entries.
+ * @param size size of array
+ * @param arg number of arguments the counted functions have
+ * @return 0 on success, a negative value indicates that no expression or array was passed
+ * or size was zero
+ */
+int av_expr_count_func(AVExpr *e, unsigned *counter, int size, int arg);
+
+/**
+ * Free a parsed expression previously created with av_expr_parse().
+ */
+void av_expr_free(AVExpr *e);
+
+/**
+ * Parse the string in numstr and return its value as a double. If
+ * the string is empty, contains only whitespaces, or does not contain
+ * an initial substring that has the expected syntax for a
+ * floating-point number, no conversion is performed. In this case,
+ * returns a value of zero and the value returned in tail is the value
+ * of numstr.
+ *
+ * @param numstr a string representing a number, may contain one of
+ * the International System number postfixes, for example 'K', 'M',
+ * 'G'. If 'i' is appended after the postfix, powers of 2 are used
+ * instead of powers of 10. The 'B' postfix multiplies the value by
+ * 8, and can be appended after another postfix or used alone. This
+ * allows using for example 'KB', 'MiB', 'G' and 'B' as postfix.
+ * @param tail if non-NULL puts here the pointer to the char next
+ * after the last parsed character
+ */
+double av_strtod(const char *numstr, char **tail);
+
+#endif /* AVUTIL_EVAL_H */

ffmpeg/include/libavutil/executor.h

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2023 Nuo Mi
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_EXECUTOR_H
+#define AVUTIL_EXECUTOR_H
+
+typedef struct AVExecutor AVExecutor;
+typedef struct AVTask AVTask;
+
+struct AVTask {
+    AVTask *next;
+};
+
+typedef struct AVTaskCallbacks {
+    void *user_data;
+
+    int local_context_size;
+
+    // return 1 if a's priority > b's priority
+    int (*priority_higher)(const AVTask *a, const AVTask *b);
+
+    // task is ready for run
+    int (*ready)(const AVTask *t, void *user_data);
+
+    // run the task
+    int (*run)(AVTask *t, void *local_context, void *user_data);
+} AVTaskCallbacks;
+
+/**
+ * Alloc executor
+ * @param callbacks callback structure for executor
+ * @param thread_count worker thread number, 0 for run on caller's thread directly
+ * @return return the executor
+ */
+AVExecutor* av_executor_alloc(const AVTaskCallbacks *callbacks, int thread_count);
+
+/**
+ * Free executor
+ * @param e  pointer to executor
+ */
+void av_executor_free(AVExecutor **e);
+
+/**
+ * Add task to executor
+ * @param e pointer to executor
+ * @param t pointer to task. If NULL, it will wakeup one work thread
+ */
+void av_executor_execute(AVExecutor *e, AVTask *t);
+
+#endif //AVUTIL_EXECUTOR_H

ffmpeg/include/libavutil/ffversion.h

@@ -0,0 +1,5 @@
+/* Automatically generated by version.sh, do not manually edit! */
+#ifndef AVUTIL_FFVERSION_H
+#define AVUTIL_FFVERSION_H
+#define FFMPEG_VERSION "N-118274-gc0fbb6d5b7-20250110"
+#endif /* AVUTIL_FFVERSION_H */

ffmpeg/include/libavutil/fifo.h

@@ -0,0 +1,242 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_fifo
+ * A generic FIFO API
+ */
+
+#ifndef AVUTIL_FIFO_H
+#define AVUTIL_FIFO_H
+
+#include <stddef.h>
+
+/**
+ * @defgroup lavu_fifo AVFifo
+ * @ingroup lavu_data
+ *
+ * @{
+ * A generic FIFO API
+ */
+
+typedef struct AVFifo AVFifo;
+
+/**
+ * Callback for writing or reading from a FIFO, passed to (and invoked from) the
+ * av_fifo_*_cb() functions. It may be invoked multiple times from a single
+ * av_fifo_*_cb() call and may process less data than the maximum size indicated
+ * by nb_elems.
+ *
+ * @param opaque the opaque pointer provided to the av_fifo_*_cb() function
+ * @param buf the buffer for reading or writing the data, depending on which
+ *            av_fifo_*_cb function is called
+ * @param nb_elems On entry contains the maximum number of elements that can be
+ *                 read from / written into buf. On success, the callback should
+ *                 update it to contain the number of elements actually written.
+ *
+ * @return 0 on success, a negative error code on failure (will be returned from
+ *         the invoking av_fifo_*_cb() function)
+ */
+typedef int AVFifoCB(void *opaque, void *buf, size_t *nb_elems);
+
+/**
+ * Automatically resize the FIFO on writes, so that the data fits. This
+ * automatic resizing happens up to a limit that can be modified with
+ * av_fifo_auto_grow_limit().
+ */
+#define AV_FIFO_FLAG_AUTO_GROW      (1 << 0)
+
+/**
+ * Allocate and initialize an AVFifo with a given element size.
+ *
+ * @param elems     initial number of elements that can be stored in the FIFO
+ * @param elem_size Size in bytes of a single element. Further operations on
+ *                  the returned FIFO will implicitly use this element size.
+ * @param flags a combination of AV_FIFO_FLAG_*
+ *
+ * @return newly-allocated AVFifo on success, a negative error code on failure
+ */
+AVFifo *av_fifo_alloc2(size_t elems, size_t elem_size,
+                       unsigned int flags);
+
+/**
+ * @return Element size for FIFO operations. This element size is set at
+ *         FIFO allocation and remains constant during its lifetime
+ */
+size_t av_fifo_elem_size(const AVFifo *f);
+
+/**
+ * Set the maximum size (in elements) to which the FIFO can be resized
+ * automatically. Has no effect unless AV_FIFO_FLAG_AUTO_GROW is used.
+ */
+void av_fifo_auto_grow_limit(AVFifo *f, size_t max_elems);
+
+/**
+ * @return number of elements available for reading from the given FIFO.
+ */
+size_t av_fifo_can_read(const AVFifo *f);
+
+/**
+ * @return Number of elements that can be written into the given FIFO without
+ *         growing it.
+ *
+ *         In other words, this number of elements or less is guaranteed to fit
+ *         into the FIFO. More data may be written when the
+ *         AV_FIFO_FLAG_AUTO_GROW flag was specified at FIFO creation, but this
+ *         may involve memory allocation, which can fail.
+ */
+size_t av_fifo_can_write(const AVFifo *f);
+
+/**
+ * Enlarge an AVFifo.
+ *
+ * On success, the FIFO will be large enough to hold exactly
+ * inc + av_fifo_can_read() + av_fifo_can_write()
+ * elements. In case of failure, the old FIFO is kept unchanged.
+ *
+ * @param f AVFifo to resize
+ * @param inc number of elements to allocate for, in addition to the current
+ *            allocated size
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_grow2(AVFifo *f, size_t inc);
+
+/**
+ * Write data into a FIFO.
+ *
+ * In case nb_elems > av_fifo_can_write(f) and the AV_FIFO_FLAG_AUTO_GROW flag
+ * was not specified at FIFO creation, nothing is written and an error
+ * is returned.
+ *
+ * Calling function is guaranteed to succeed if nb_elems <= av_fifo_can_write(f).
+ *
+ * @param f the FIFO buffer
+ * @param buf Data to be written. nb_elems * av_fifo_elem_size(f) bytes will be
+ *            read from buf on success.
+ * @param nb_elems number of elements to write into FIFO
+ *
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_write(AVFifo *f, const void *buf, size_t nb_elems);
+
+/**
+ * Write data from a user-provided callback into a FIFO.
+ *
+ * @param f the FIFO buffer
+ * @param read_cb Callback supplying the data to the FIFO. May be called
+ *                multiple times.
+ * @param opaque opaque user data to be provided to read_cb
+ * @param nb_elems Should point to the maximum number of elements that can be
+ *                 written. Will be updated to contain the number of elements
+ *                 actually written.
+ *
+ * @return non-negative number on success, a negative error code on failure
+ */
+int av_fifo_write_from_cb(AVFifo *f, AVFifoCB read_cb,
+                          void *opaque, size_t *nb_elems);
+
+/**
+ * Read data from a FIFO.
+ *
+ * In case nb_elems > av_fifo_can_read(f), nothing is read and an error
+ * is returned.
+ *
+ * @param f the FIFO buffer
+ * @param buf Buffer to store the data. nb_elems * av_fifo_elem_size(f) bytes
+ *            will be written into buf on success.
+ * @param nb_elems number of elements to read from FIFO
+ *
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_read(AVFifo *f, void *buf, size_t nb_elems);
+
+/**
+ * Feed data from a FIFO into a user-provided callback.
+ *
+ * @param f the FIFO buffer
+ * @param write_cb Callback the data will be supplied to. May be called
+ *                 multiple times.
+ * @param opaque opaque user data to be provided to write_cb
+ * @param nb_elems Should point to the maximum number of elements that can be
+ *                 read. Will be updated to contain the total number of elements
+ *                 actually sent to the callback.
+ *
+ * @return non-negative number on success, a negative error code on failure
+ */
+int av_fifo_read_to_cb(AVFifo *f, AVFifoCB write_cb,
+                       void *opaque, size_t *nb_elems);
+
+/**
+ * Read data from a FIFO without modifying FIFO state.
+ *
+ * Returns an error if an attempt is made to peek to nonexistent elements
+ * (i.e. if offset + nb_elems is larger than av_fifo_can_read(f)).
+ *
+ * @param f the FIFO buffer
+ * @param buf Buffer to store the data. nb_elems * av_fifo_elem_size(f) bytes
+ *            will be written into buf.
+ * @param nb_elems number of elements to read from FIFO
+ * @param offset number of initial elements to skip.
+ *
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_peek(const AVFifo *f, void *buf, size_t nb_elems, size_t offset);
+
+/**
+ * Feed data from a FIFO into a user-provided callback.
+ *
+ * @param f the FIFO buffer
+ * @param write_cb Callback the data will be supplied to. May be called
+ *                 multiple times.
+ * @param opaque opaque user data to be provided to write_cb
+ * @param nb_elems Should point to the maximum number of elements that can be
+ *                 read. Will be updated to contain the total number of elements
+ *                 actually sent to the callback.
+ * @param offset number of initial elements to skip; offset + *nb_elems must not
+ *               be larger than av_fifo_can_read(f).
+ *
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_peek_to_cb(const AVFifo *f, AVFifoCB write_cb, void *opaque,
+                       size_t *nb_elems, size_t offset);
+
+/**
+ * Discard the specified amount of data from an AVFifo.
+ * @param size number of elements to discard, MUST NOT be larger than
+ *             av_fifo_can_read(f)
+ */
+void av_fifo_drain2(AVFifo *f, size_t size);
+
+/*
+ * Empty the AVFifo.
+ * @param f AVFifo to reset
+ */
+void av_fifo_reset2(AVFifo *f);
+
+/**
+ * Free an AVFifo and reset pointer to NULL.
+ * @param f Pointer to an AVFifo to free. *f == NULL is allowed.
+ */
+void av_fifo_freep2(AVFifo **f);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_FIFO_H */

ffmpeg/include/libavutil/file.h

@@ -0,0 +1,62 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_FILE_H
+#define AVUTIL_FILE_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "attributes.h"
+
+/**
+ * @file
+ * Misc file utilities.
+ */
+
+/**
+ * Read the file with name filename, and put its content in a newly
+ * allocated buffer or map it with mmap() when available.
+ * In case of success set *bufptr to the read or mmapped buffer, and
+ * *size to the size in bytes of the buffer in *bufptr.
+ * Unlike mmap this function succeeds with zero sized files, in this
+ * case *bufptr will be set to NULL and *size will be set to 0.
+ * The returned buffer must be released with av_file_unmap().
+ *
+ * @param filename path to the file
+ * @param[out] bufptr pointee is set to the mapped or allocated buffer
+ * @param[out] size pointee is set to the size in bytes of the buffer
+ * @param log_offset loglevel offset used for logging
+ * @param log_ctx context used for logging
+ * @return a non negative number in case of success, a negative value
+ * corresponding to an AVERROR error code in case of failure
+ */
+av_warn_unused_result
+int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
+                int log_offset, void *log_ctx);
+
+/**
+ * Unmap or free the buffer bufptr created by av_file_map().
+ *
+ * @param bufptr the buffer previously created with av_file_map()
+ * @param size size in bytes of bufptr, must be the same as returned
+ * by av_file_map()
+ */
+void av_file_unmap(uint8_t *bufptr, size_t size);
+
+#endif /* AVUTIL_FILE_H */

ffmpeg/include/libavutil/film_grain_params.h

@@ -0,0 +1,322 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_FILM_GRAIN_PARAMS_H
+#define AVUTIL_FILM_GRAIN_PARAMS_H
+
+#include "frame.h"
+
+enum AVFilmGrainParamsType {
+    AV_FILM_GRAIN_PARAMS_NONE = 0,
+
+    /**
+     * The union is valid when interpreted as AVFilmGrainAOMParams (codec.aom)
+     */
+    AV_FILM_GRAIN_PARAMS_AV1,
+
+    /**
+     * The union is valid when interpreted as AVFilmGrainH274Params (codec.h274)
+     */
+    AV_FILM_GRAIN_PARAMS_H274,
+};
+
+/**
+ * This structure describes how to handle film grain synthesis for AOM codecs.
+ *
+ * @note The struct must be allocated as part of AVFilmGrainParams using
+ *       av_film_grain_params_alloc(). Its size is not a part of the public ABI.
+ */
+typedef struct AVFilmGrainAOMParams {
+    /**
+     * Number of points, and the scale and value for each point of the
+     * piecewise linear scaling function for the uma plane.
+     */
+    int num_y_points;
+    uint8_t y_points[14][2 /* value, scaling */];
+
+    /**
+     * Signals whether to derive the chroma scaling function from the luma.
+     * Not equivalent to copying the luma values and scales.
+     */
+    int chroma_scaling_from_luma;
+
+    /**
+     * If chroma_scaling_from_luma is set to 0, signals the chroma scaling
+     * function parameters.
+     */
+    int num_uv_points[2 /* cb, cr */];
+    uint8_t uv_points[2 /* cb, cr */][10][2 /* value, scaling */];
+
+    /**
+     * Specifies the shift applied to the chroma components. For AV1, its within
+     * [8; 11] and determines the range and quantization of the film grain.
+     */
+    int scaling_shift;
+
+    /**
+     * Specifies the auto-regression lag.
+     */
+    int ar_coeff_lag;
+
+    /**
+     * Luma auto-regression coefficients. The number of coefficients is given by
+     * 2 * ar_coeff_lag * (ar_coeff_lag + 1).
+     */
+    int8_t ar_coeffs_y[24];
+
+    /**
+     * Chroma auto-regression coefficients. The number of coefficients is given by
+     * 2 * ar_coeff_lag * (ar_coeff_lag + 1) + !!num_y_points.
+     */
+    int8_t ar_coeffs_uv[2 /* cb, cr */][25];
+
+    /**
+     * Specifies the range of the auto-regressive coefficients. Values of 6,
+     * 7, 8 and so on represent a range of [-2, 2), [-1, 1), [-0.5, 0.5) and
+     * so on. For AV1 must be between 6 and 9.
+     */
+    int ar_coeff_shift;
+
+    /**
+     * Signals the down shift applied to the generated gaussian numbers during
+     * synthesis.
+     */
+    int grain_scale_shift;
+
+    /**
+     * Specifies the luma/chroma multipliers for the index to the component
+     * scaling function.
+     */
+    int uv_mult[2 /* cb, cr */];
+    int uv_mult_luma[2 /* cb, cr */];
+
+    /**
+     * Offset used for component scaling function. For AV1 its a 9-bit value
+     * with a range [-256, 255]
+     */
+    int uv_offset[2 /* cb, cr */];
+
+    /**
+     * Signals whether to overlap film grain blocks.
+     */
+    int overlap_flag;
+
+    /**
+     * Signals to clip to limited color levels after film grain application.
+     */
+    int limit_output_range;
+} AVFilmGrainAOMParams;
+
+/**
+ * This structure describes how to handle film grain synthesis for codecs using
+ * the ITU-T H.274 Versatile suplemental enhancement information message.
+ *
+ * @note The struct must be allocated as part of AVFilmGrainParams using
+ *       av_film_grain_params_alloc(). Its size is not a part of the public ABI.
+ */
+typedef struct AVFilmGrainH274Params {
+    /**
+     * Specifies the film grain simulation mode.
+     * 0 = Frequency filtering, 1 = Auto-regression
+     */
+    int model_id;
+
+#if FF_API_H274_FILM_GRAIN_VCS
+  /**
+   * TODO: On this ABI bump, please also re-order the fields in
+   * AVFilmGrainParams (see below)
+   */
+
+  /**
+   * Specifies the bit depth used for the luma component.
+   *
+   * @deprecated use AVFilmGrainParams.bit_depth_luma.
+   */
+    attribute_deprecated
+    int bit_depth_luma;
+
+    /**
+     * Specifies the bit depth used for the chroma components.
+     *
+     * @deprecated use AVFilmGrainParams.bit_depth_chroma.
+     */
+    attribute_deprecated
+    int bit_depth_chroma;
+
+    /**
+     * Specifies the video signal characteristics.
+     *
+     * @deprecated use AVFilmGrainParams.color_{range,primaries,trc,space}.
+     */
+    attribute_deprecated
+    enum AVColorRange                  color_range;
+    attribute_deprecated
+    enum AVColorPrimaries              color_primaries;
+    attribute_deprecated
+    enum AVColorTransferCharacteristic color_trc;
+    attribute_deprecated
+    enum AVColorSpace                  color_space;
+#endif
+
+    /**
+     * Specifies the blending mode used to blend the simulated film grain
+     * with the decoded images.
+     *
+     * 0 = Additive, 1 = Multiplicative
+     */
+    int blending_mode_id;
+
+    /**
+     * Specifies a scale factor used in the film grain characterization equations.
+     */
+    int log2_scale_factor;
+
+    /**
+     * Indicates if the modelling of film grain for a given component is present.
+     */
+    int component_model_present[3 /* y, cb, cr */];
+
+    /**
+     * Specifies the number of intensity intervals for which a specific set of
+     * model values has been estimated, with a range of [1, 256].
+     */
+    uint16_t num_intensity_intervals[3 /* y, cb, cr */];
+
+    /**
+     * Specifies the number of model values present for each intensity interval
+     * in which the film grain has been modelled, with a range of [1, 6].
+     */
+    uint8_t num_model_values[3 /* y, cb, cr */];
+
+    /**
+     * Specifies the lower ounds of each intensity interval for whichthe set of
+     * model values applies for the component.
+     */
+    uint8_t intensity_interval_lower_bound[3 /* y, cb, cr */][256 /* intensity interval */];
+
+    /**
+     * Specifies the upper bound of each intensity interval for which the set of
+     * model values applies for the component.
+     */
+    uint8_t intensity_interval_upper_bound[3 /* y, cb, cr */][256 /* intensity interval */];
+
+    /**
+     * Specifies the model values for the component for each intensity interval.
+     * - When model_id == 0, the following applies:
+     *     For comp_model_value[y], the range of values is [0, 2^bit_depth_luma - 1]
+     *     For comp_model_value[cb..cr], the range of values is [0, 2^bit_depth_chroma - 1]
+     * - Otherwise, the following applies:
+     *     For comp_model_value[y], the range of values is [-2^(bit_depth_luma - 1), 2^(bit_depth_luma - 1) - 1]
+     *     For comp_model_value[cb..cr], the range of values is [-2^(bit_depth_chroma - 1), 2^(bit_depth_chroma - 1) - 1]
+     */
+    int16_t comp_model_value[3 /* y, cb, cr */][256 /* intensity interval */][6 /* model value */];
+} AVFilmGrainH274Params;
+
+/**
+ * This structure describes how to handle film grain synthesis in video
+ * for specific codecs. Must be present on every frame where film grain is
+ * meant to be synthesised for correct presentation.
+ *
+ * @note The struct must be allocated with av_film_grain_params_alloc() and
+ *       its size is not a part of the public ABI.
+ */
+typedef struct AVFilmGrainParams {
+    /**
+     * Specifies the codec for which this structure is valid.
+     */
+    enum AVFilmGrainParamsType type;
+
+    /**
+     * Seed to use for the synthesis process, if the codec allows for it.
+     *
+     * @note For H.264, this refers to `pic_offset` as defined in
+     *       SMPTE RDD 5-2006.
+     */
+    uint64_t seed;
+
+    /**
+     * Additional fields may be added both here and in any structure included.
+     * If a codec's film grain structure differs slightly over another
+     * codec's, fields within may change meaning depending on the type.
+     *
+     * TODO: Move this to the end of the structure, at the next ABI bump.
+     */
+    union {
+        AVFilmGrainAOMParams aom;
+        AVFilmGrainH274Params h274;
+    } codec;
+
+    /**
+     * Intended display resolution. May be 0 if the codec does not specify
+     * any restrictions.
+     */
+
+    int width, height;
+
+    /**
+     * Intended subsampling ratio, or 0 for luma-only streams.
+     */
+    int subsampling_x, subsampling_y;
+
+    /**
+     * Intended video signal characteristics.
+     */
+    enum AVColorRange                  color_range;
+    enum AVColorPrimaries              color_primaries;
+    enum AVColorTransferCharacteristic color_trc;
+    enum AVColorSpace                  color_space;
+
+    /**
+     * Intended bit depth, or 0 for unknown/unspecified.
+     */
+    int bit_depth_luma;
+    int bit_depth_chroma;
+
+} AVFilmGrainParams;
+
+/**
+ * Allocate an AVFilmGrainParams structure and set its fields to
+ * default values. The resulting struct can be freed using av_freep().
+ * If size is not NULL it will be set to the number of bytes allocated.
+ *
+ * @return An AVFilmGrainParams filled with default values or NULL
+ *         on failure.
+ */
+AVFilmGrainParams *av_film_grain_params_alloc(size_t *size);
+
+/**
+ * Allocate a complete AVFilmGrainParams and add it to the frame.
+ *
+ * @param frame The frame which side data is added to.
+ *
+ * @return The AVFilmGrainParams structure to be filled by caller.
+ */
+AVFilmGrainParams *av_film_grain_params_create_side_data(AVFrame *frame);
+
+/**
+ * Select the most appropriate film grain parameters set for the frame,
+ * taking into account the frame's format, resolution and video signal
+ * characteristics.
+ *
+ * @note, for H.274, this may select a film grain parameter set with
+ * greater chroma resolution than the frame. Users should take care to
+ * correctly adjust the chroma grain frequency to the frame.
+ */
+const AVFilmGrainParams *av_film_grain_params_select(const AVFrame *frame);
+
+#endif /* AVUTIL_FILM_GRAIN_PARAMS_H */

ffmpeg/include/libavutil/frame.h

@@ -0,0 +1,1202 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_frame
+ * reference-counted frame API
+ */
+
+#ifndef AVUTIL_FRAME_H
+#define AVUTIL_FRAME_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "avutil.h"
+#include "buffer.h"
+#include "channel_layout.h"
+#include "dict.h"
+#include "rational.h"
+#include "samplefmt.h"
+#include "pixfmt.h"
+#include "version.h"
+
+
+/**
+ * @defgroup lavu_frame AVFrame
+ * @ingroup lavu_data
+ *
+ * @{
+ * AVFrame is an abstraction for reference-counted raw multimedia data.
+ */
+
+enum AVFrameSideDataType {
+    /**
+     * The data is the AVPanScan struct defined in libavcodec.
+     */
+    AV_FRAME_DATA_PANSCAN,
+    /**
+     * ATSC A53 Part 4 Closed Captions.
+     * A53 CC bitstream is stored as uint8_t in AVFrameSideData.data.
+     * The number of bytes of CC data is AVFrameSideData.size.
+     */
+    AV_FRAME_DATA_A53_CC,
+    /**
+     * Stereoscopic 3d metadata.
+     * The data is the AVStereo3D struct defined in libavutil/stereo3d.h.
+     */
+    AV_FRAME_DATA_STEREO3D,
+    /**
+     * The data is the AVMatrixEncoding enum defined in libavutil/channel_layout.h.
+     */
+    AV_FRAME_DATA_MATRIXENCODING,
+    /**
+     * Metadata relevant to a downmix procedure.
+     * The data is the AVDownmixInfo struct defined in libavutil/downmix_info.h.
+     */
+    AV_FRAME_DATA_DOWNMIX_INFO,
+    /**
+     * ReplayGain information in the form of the AVReplayGain struct.
+     */
+    AV_FRAME_DATA_REPLAYGAIN,
+    /**
+     * This side data contains a 3x3 transformation matrix describing an affine
+     * transformation that needs to be applied to the frame for correct
+     * presentation.
+     *
+     * See libavutil/display.h for a detailed description of the data.
+     */
+    AV_FRAME_DATA_DISPLAYMATRIX,
+    /**
+     * Active Format Description data consisting of a single byte as specified
+     * in ETSI TS 101 154 using AVActiveFormatDescription enum.
+     */
+    AV_FRAME_DATA_AFD,
+    /**
+     * Motion vectors exported by some codecs (on demand through the export_mvs
+     * flag set in the libavcodec AVCodecContext flags2 option).
+     * The data is the AVMotionVector struct defined in
+     * libavutil/motion_vector.h.
+     */
+    AV_FRAME_DATA_MOTION_VECTORS,
+    /**
+     * Recommmends skipping the specified number of samples. This is exported
+     * only if the "skip_manual" AVOption is set in libavcodec.
+     * This has the same format as AV_PKT_DATA_SKIP_SAMPLES.
+     * @code
+     * u32le number of samples to skip from start of this packet
+     * u32le number of samples to skip from end of this packet
+     * u8    reason for start skip
+     * u8    reason for end   skip (0=padding silence, 1=convergence)
+     * @endcode
+     */
+    AV_FRAME_DATA_SKIP_SAMPLES,
+    /**
+     * This side data must be associated with an audio frame and corresponds to
+     * enum AVAudioServiceType defined in avcodec.h.
+     */
+    AV_FRAME_DATA_AUDIO_SERVICE_TYPE,
+    /**
+     * Mastering display metadata associated with a video frame. The payload is
+     * an AVMasteringDisplayMetadata type and contains information about the
+     * mastering display color volume.
+     */
+    AV_FRAME_DATA_MASTERING_DISPLAY_METADATA,
+    /**
+     * The GOP timecode in 25 bit timecode format. Data format is 64-bit integer.
+     * This is set on the first frame of a GOP that has a temporal reference of 0.
+     */
+    AV_FRAME_DATA_GOP_TIMECODE,
+
+    /**
+     * The data represents the AVSphericalMapping structure defined in
+     * libavutil/spherical.h.
+     */
+    AV_FRAME_DATA_SPHERICAL,
+
+    /**
+     * Content light level (based on CTA-861.3). This payload contains data in
+     * the form of the AVContentLightMetadata struct.
+     */
+    AV_FRAME_DATA_CONTENT_LIGHT_LEVEL,
+
+    /**
+     * The data contains an ICC profile as an opaque octet buffer following the
+     * format described by ISO 15076-1 with an optional name defined in the
+     * metadata key entry "name".
+     */
+    AV_FRAME_DATA_ICC_PROFILE,
+
+    /**
+     * Timecode which conforms to SMPTE ST 12-1. The data is an array of 4 uint32_t
+     * where the first uint32_t describes how many (1-3) of the other timecodes are used.
+     * The timecode format is described in the documentation of av_timecode_get_smpte_from_framenum()
+     * function in libavutil/timecode.h.
+     */
+    AV_FRAME_DATA_S12M_TIMECODE,
+
+    /**
+     * HDR dynamic metadata associated with a video frame. The payload is
+     * an AVDynamicHDRPlus type and contains information for color
+     * volume transform - application 4 of SMPTE 2094-40:2016 standard.
+     */
+    AV_FRAME_DATA_DYNAMIC_HDR_PLUS,
+
+    /**
+     * Regions Of Interest, the data is an array of AVRegionOfInterest type, the number of
+     * array element is implied by AVFrameSideData.size / AVRegionOfInterest.self_size.
+     */
+    AV_FRAME_DATA_REGIONS_OF_INTEREST,
+
+    /**
+     * Encoding parameters for a video frame, as described by AVVideoEncParams.
+     */
+    AV_FRAME_DATA_VIDEO_ENC_PARAMS,
+
+    /**
+     * User data unregistered metadata associated with a video frame.
+     * This is the H.26[45] UDU SEI message, and shouldn't be used for any other purpose
+     * The data is stored as uint8_t in AVFrameSideData.data which is 16 bytes of
+     * uuid_iso_iec_11578 followed by AVFrameSideData.size - 16 bytes of user_data_payload_byte.
+     */
+    AV_FRAME_DATA_SEI_UNREGISTERED,
+
+    /**
+     * Film grain parameters for a frame, described by AVFilmGrainParams.
+     * Must be present for every frame which should have film grain applied.
+     *
+     * May be present multiple times, for example when there are multiple
+     * alternative parameter sets for different video signal characteristics.
+     * The user should select the most appropriate set for the application.
+     */
+    AV_FRAME_DATA_FILM_GRAIN_PARAMS,
+
+    /**
+     * Bounding boxes for object detection and classification,
+     * as described by AVDetectionBBoxHeader.
+     */
+    AV_FRAME_DATA_DETECTION_BBOXES,
+
+    /**
+     * Dolby Vision RPU raw data, suitable for passing to x265
+     * or other libraries. Array of uint8_t, with NAL emulation
+     * bytes intact.
+     */
+    AV_FRAME_DATA_DOVI_RPU_BUFFER,
+
+    /**
+     * Parsed Dolby Vision metadata, suitable for passing to a software
+     * implementation. The payload is the AVDOVIMetadata struct defined in
+     * libavutil/dovi_meta.h.
+     */
+    AV_FRAME_DATA_DOVI_METADATA,
+
+    /**
+     * HDR Vivid dynamic metadata associated with a video frame. The payload is
+     * an AVDynamicHDRVivid type and contains information for color
+     * volume transform - CUVA 005.1-2021.
+     */
+    AV_FRAME_DATA_DYNAMIC_HDR_VIVID,
+
+    /**
+     * Ambient viewing environment metadata, as defined by H.274.
+     */
+    AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT,
+
+    /**
+     * Provide encoder-specific hinting information about changed/unchanged
+     * portions of a frame.  It can be used to pass information about which
+     * macroblocks can be skipped because they didn't change from the
+     * corresponding ones in the previous frame. This could be useful for
+     * applications which know this information in advance to speed up
+     * encoding.
+     */
+    AV_FRAME_DATA_VIDEO_HINT,
+
+    /**
+     * Raw LCEVC payload data, as a uint8_t array, with NAL emulation
+     * bytes intact.
+     */
+    AV_FRAME_DATA_LCEVC,
+
+    /**
+     * This side data must be associated with a video frame.
+     * The presence of this side data indicates that the video stream is
+     * composed of multiple views (e.g. stereoscopic 3D content,
+     * cf. H.264 Annex H or H.265 Annex G).
+     * The data is an int storing the view ID.
+     */
+    AV_FRAME_DATA_VIEW_ID,
+};
+
+enum AVActiveFormatDescription {
+    AV_AFD_SAME         = 8,
+    AV_AFD_4_3          = 9,
+    AV_AFD_16_9         = 10,
+    AV_AFD_14_9         = 11,
+    AV_AFD_4_3_SP_14_9  = 13,
+    AV_AFD_16_9_SP_14_9 = 14,
+    AV_AFD_SP_4_3       = 15,
+};
+
+
+/**
+ * Structure to hold side data for an AVFrame.
+ *
+ * sizeof(AVFrameSideData) is not a part of the public ABI, so new fields may be added
+ * to the end with a minor bump.
+ */
+typedef struct AVFrameSideData {
+    enum AVFrameSideDataType type;
+    uint8_t *data;
+    size_t   size;
+    AVDictionary *metadata;
+    AVBufferRef *buf;
+} AVFrameSideData;
+
+enum AVSideDataProps {
+    /**
+     * The side data type can be used in stream-global structures.
+     * Side data types without this property are only meaningful on per-frame
+     * basis.
+     */
+    AV_SIDE_DATA_PROP_GLOBAL = (1 << 0),
+
+    /**
+     * Multiple instances of this side data type can be meaningfully present in
+     * a single side data array.
+     */
+    AV_SIDE_DATA_PROP_MULTI  = (1 << 1),
+
+    /**
+     * Side data depends on the video dimensions. Side data with this property
+     * loses its meaning when rescaling or cropping the image, unless
+     * either recomputed or adjusted to the new resolution.
+     */
+    AV_SIDE_DATA_PROP_SIZE_DEPENDENT = (1 << 2),
+
+    /**
+     * Side data depends on the video color space. Side data with this property
+     * loses its meaning when changing the video color encoding, e.g. by
+     * adapting to a different set of primaries or transfer characteristics.
+     */
+    AV_SIDE_DATA_PROP_COLOR_DEPENDENT = (1 << 3),
+};
+
+/**
+ * This struct describes the properties of a side data type. Its instance
+ * corresponding to a given type can be obtained from av_frame_side_data_desc().
+ */
+typedef struct AVSideDataDescriptor {
+    /**
+     * Human-readable side data description.
+     */
+    const char      *name;
+
+    /**
+     * Side data property flags, a combination of AVSideDataProps values.
+     */
+    unsigned         props;
+} AVSideDataDescriptor;
+
+/**
+ * Structure describing a single Region Of Interest.
+ *
+ * When multiple regions are defined in a single side-data block, they
+ * should be ordered from most to least important - some encoders are only
+ * capable of supporting a limited number of distinct regions, so will have
+ * to truncate the list.
+ *
+ * When overlapping regions are defined, the first region containing a given
+ * area of the frame applies.
+ */
+typedef struct AVRegionOfInterest {
+    /**
+     * Must be set to the size of this data structure (that is,
+     * sizeof(AVRegionOfInterest)).
+     */
+    uint32_t self_size;
+    /**
+     * Distance in pixels from the top edge of the frame to the top and
+     * bottom edges and from the left edge of the frame to the left and
+     * right edges of the rectangle defining this region of interest.
+     *
+     * The constraints on a region are encoder dependent, so the region
+     * actually affected may be slightly larger for alignment or other
+     * reasons.
+     */
+    int top;
+    int bottom;
+    int left;
+    int right;
+    /**
+     * Quantisation offset.
+     *
+     * Must be in the range -1 to +1.  A value of zero indicates no quality
+     * change.  A negative value asks for better quality (less quantisation),
+     * while a positive value asks for worse quality (greater quantisation).
+     *
+     * The range is calibrated so that the extreme values indicate the
+     * largest possible offset - if the rest of the frame is encoded with the
+     * worst possible quality, an offset of -1 indicates that this region
+     * should be encoded with the best possible quality anyway.  Intermediate
+     * values are then interpolated in some codec-dependent way.
+     *
+     * For example, in 10-bit H.264 the quantisation parameter varies between
+     * -12 and 51.  A typical qoffset value of -1/10 therefore indicates that
+     * this region should be encoded with a QP around one-tenth of the full
+     * range better than the rest of the frame.  So, if most of the frame
+     * were to be encoded with a QP of around 30, this region would get a QP
+     * of around 24 (an offset of approximately -1/10 * (51 - -12) = -6.3).
+     * An extreme value of -1 would indicate that this region should be
+     * encoded with the best possible quality regardless of the treatment of
+     * the rest of the frame - that is, should be encoded at a QP of -12.
+     */
+    AVRational qoffset;
+} AVRegionOfInterest;
+
+/**
+ * This structure describes decoded (raw) audio or video data.
+ *
+ * AVFrame must be allocated using av_frame_alloc(). Note that this only
+ * allocates the AVFrame itself, the buffers for the data must be managed
+ * through other means (see below).
+ * AVFrame must be freed with av_frame_free().
+ *
+ * AVFrame is typically allocated once and then reused multiple times to hold
+ * different data (e.g. a single AVFrame to hold frames received from a
+ * decoder). In such a case, av_frame_unref() will free any references held by
+ * the frame and reset it to its original clean state before it
+ * is reused again.
+ *
+ * The data described by an AVFrame is usually reference counted through the
+ * AVBuffer API. The underlying buffer references are stored in AVFrame.buf /
+ * AVFrame.extended_buf. An AVFrame is considered to be reference counted if at
+ * least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case,
+ * every single data plane must be contained in one of the buffers in
+ * AVFrame.buf or AVFrame.extended_buf.
+ * There may be a single buffer for all the data, or one separate buffer for
+ * each plane, or anything in between.
+ *
+ * sizeof(AVFrame) is not a part of the public ABI, so new fields may be added
+ * to the end with a minor bump.
+ *
+ * Fields can be accessed through AVOptions, the name string used, matches the
+ * C structure field name for fields accessible through AVOptions.
+ */
+typedef struct AVFrame {
+#define AV_NUM_DATA_POINTERS 8
+    /**
+     * pointer to the picture/channel planes.
+     * This might be different from the first allocated byte. For video,
+     * it could even point to the end of the image data.
+     *
+     * All pointers in data and extended_data must point into one of the
+     * AVBufferRef in buf or extended_buf.
+     *
+     * Some decoders access areas outside 0,0 - width,height, please
+     * see avcodec_align_dimensions2(). Some filters and swscale can read
+     * up to 16 bytes beyond the planes, if these filters are to be used,
+     * then 16 extra bytes must be allocated.
+     *
+     * NOTE: Pointers not needed by the format MUST be set to NULL.
+     *
+     * @attention In case of video, the data[] pointers can point to the
+     * end of image data in order to reverse line order, when used in
+     * combination with negative values in the linesize[] array.
+     */
+    uint8_t *data[AV_NUM_DATA_POINTERS];
+
+    /**
+     * For video, a positive or negative value, which is typically indicating
+     * the size in bytes of each picture line, but it can also be:
+     * - the negative byte size of lines for vertical flipping
+     *   (with data[n] pointing to the end of the data
+     * - a positive or negative multiple of the byte size as for accessing
+     *   even and odd fields of a frame (possibly flipped)
+     *
+     * For audio, only linesize[0] may be set. For planar audio, each channel
+     * plane must be the same size.
+     *
+     * For video the linesizes should be multiples of the CPUs alignment
+     * preference, this is 16 or 32 for modern desktop CPUs.
+     * Some code requires such alignment other code can be slower without
+     * correct alignment, for yet other it makes no difference.
+     *
+     * @note The linesize may be larger than the size of usable data -- there
+     * may be extra padding present for performance reasons.
+     *
+     * @attention In case of video, line size values can be negative to achieve
+     * a vertically inverted iteration over image lines.
+     */
+    int linesize[AV_NUM_DATA_POINTERS];
+
+    /**
+     * pointers to the data planes/channels.
+     *
+     * For video, this should simply point to data[].
+     *
+     * For planar audio, each channel has a separate data pointer, and
+     * linesize[0] contains the size of each channel buffer.
+     * For packed audio, there is just one data pointer, and linesize[0]
+     * contains the total size of the buffer for all channels.
+     *
+     * Note: Both data and extended_data should always be set in a valid frame,
+     * but for planar audio with more channels that can fit in data,
+     * extended_data must be used in order to access all channels.
+     */
+    uint8_t **extended_data;
+
+    /**
+     * @name Video dimensions
+     * Video frames only. The coded dimensions (in pixels) of the video frame,
+     * i.e. the size of the rectangle that contains some well-defined values.
+     *
+     * @note The part of the frame intended for display/presentation is further
+     * restricted by the @ref cropping "Cropping rectangle".
+     * @{
+     */
+    int width, height;
+    /**
+     * @}
+     */
+
+    /**
+     * number of audio samples (per channel) described by this frame
+     */
+    int nb_samples;
+
+    /**
+     * format of the frame, -1 if unknown or unset
+     * Values correspond to enum AVPixelFormat for video frames,
+     * enum AVSampleFormat for audio)
+     */
+    int format;
+
+#if FF_API_FRAME_KEY
+    /**
+     * 1 -> keyframe, 0-> not
+     *
+     * @deprecated Use AV_FRAME_FLAG_KEY instead
+     */
+    attribute_deprecated
+    int key_frame;
+#endif
+
+    /**
+     * Picture type of the frame.
+     */
+    enum AVPictureType pict_type;
+
+    /**
+     * Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
+     */
+    AVRational sample_aspect_ratio;
+
+    /**
+     * Presentation timestamp in time_base units (time when frame should be shown to user).
+     */
+    int64_t pts;
+
+    /**
+     * DTS copied from the AVPacket that triggered returning this frame. (if frame threading isn't used)
+     * This is also the Presentation time of this AVFrame calculated from
+     * only AVPacket.dts values without pts values.
+     */
+    int64_t pkt_dts;
+
+    /**
+     * Time base for the timestamps in this frame.
+     * In the future, this field may be set on frames output by decoders or
+     * filters, but its value will be by default ignored on input to encoders
+     * or filters.
+     */
+    AVRational time_base;
+
+    /**
+     * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
+     */
+    int quality;
+
+    /**
+     * Frame owner's private data.
+     *
+     * This field may be set by the code that allocates/owns the frame data.
+     * It is then not touched by any library functions, except:
+     * - it is copied to other references by av_frame_copy_props() (and hence by
+     *   av_frame_ref());
+     * - it is set to NULL when the frame is cleared by av_frame_unref()
+     * - on the caller's explicit request. E.g. libavcodec encoders/decoders
+     *   will copy this field to/from @ref AVPacket "AVPackets" if the caller sets
+     *   @ref AV_CODEC_FLAG_COPY_OPAQUE.
+     *
+     * @see opaque_ref the reference-counted analogue
+     */
+    void *opaque;
+
+    /**
+     * Number of fields in this frame which should be repeated, i.e. the total
+     * duration of this frame should be repeat_pict + 2 normal field durations.
+     *
+     * For interlaced frames this field may be set to 1, which signals that this
+     * frame should be presented as 3 fields: beginning with the first field (as
+     * determined by AV_FRAME_FLAG_TOP_FIELD_FIRST being set or not), followed
+     * by the second field, and then the first field again.
+     *
+     * For progressive frames this field may be set to a multiple of 2, which
+     * signals that this frame's duration should be (repeat_pict + 2) / 2
+     * normal frame durations.
+     *
+     * @note This field is computed from MPEG2 repeat_first_field flag and its
+     * associated flags, H.264 pic_struct from picture timing SEI, and
+     * their analogues in other codecs. Typically it should only be used when
+     * higher-layer timing information is not available.
+     */
+    int repeat_pict;
+
+#if FF_API_INTERLACED_FRAME
+    /**
+     * The content of the picture is interlaced.
+     *
+     * @deprecated Use AV_FRAME_FLAG_INTERLACED instead
+     */
+    attribute_deprecated
+    int interlaced_frame;
+
+    /**
+     * If the content is interlaced, is top field displayed first.
+     *
+     * @deprecated Use AV_FRAME_FLAG_TOP_FIELD_FIRST instead
+     */
+    attribute_deprecated
+    int top_field_first;
+#endif
+
+#if FF_API_PALETTE_HAS_CHANGED
+    /**
+     * Tell user application that palette has changed from previous frame.
+     */
+    attribute_deprecated
+    int palette_has_changed;
+#endif
+
+    /**
+     * Sample rate of the audio data.
+     */
+    int sample_rate;
+
+    /**
+     * AVBuffer references backing the data for this frame. All the pointers in
+     * data and extended_data must point inside one of the buffers in buf or
+     * extended_buf. This array must be filled contiguously -- if buf[i] is
+     * non-NULL then buf[j] must also be non-NULL for all j < i.
+     *
+     * There may be at most one AVBuffer per data plane, so for video this array
+     * always contains all the references. For planar audio with more than
+     * AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in
+     * this array. Then the extra AVBufferRef pointers are stored in the
+     * extended_buf array.
+     */
+    AVBufferRef *buf[AV_NUM_DATA_POINTERS];
+
+    /**
+     * For planar audio which requires more than AV_NUM_DATA_POINTERS
+     * AVBufferRef pointers, this array will hold all the references which
+     * cannot fit into AVFrame.buf.
+     *
+     * Note that this is different from AVFrame.extended_data, which always
+     * contains all the pointers. This array only contains the extra pointers,
+     * which cannot fit into AVFrame.buf.
+     *
+     * This array is always allocated using av_malloc() by whoever constructs
+     * the frame. It is freed in av_frame_unref().
+     */
+    AVBufferRef **extended_buf;
+    /**
+     * Number of elements in extended_buf.
+     */
+    int        nb_extended_buf;
+
+    AVFrameSideData **side_data;
+    int            nb_side_data;
+
+/**
+ * @defgroup lavu_frame_flags AV_FRAME_FLAGS
+ * @ingroup lavu_frame
+ * Flags describing additional frame properties.
+ *
+ * @{
+ */
+
+/**
+ * The frame data may be corrupted, e.g. due to decoding errors.
+ */
+#define AV_FRAME_FLAG_CORRUPT       (1 << 0)
+/**
+ * A flag to mark frames that are keyframes.
+ */
+#define AV_FRAME_FLAG_KEY (1 << 1)
+/**
+ * A flag to mark the frames which need to be decoded, but shouldn't be output.
+ */
+#define AV_FRAME_FLAG_DISCARD   (1 << 2)
+/**
+ * A flag to mark frames whose content is interlaced.
+ */
+#define AV_FRAME_FLAG_INTERLACED (1 << 3)
+/**
+ * A flag to mark frames where the top field is displayed first if the content
+ * is interlaced.
+ */
+#define AV_FRAME_FLAG_TOP_FIELD_FIRST (1 << 4)
+/**
+ * A flag to mark frames which were encoded losslessly from the input.
+ */
+#define AV_FRAME_FLAG_LOSSLESS        (1 << 5)
+/**
+ * @}
+ */
+
+    /**
+     * Frame flags, a combination of @ref lavu_frame_flags
+     */
+    int flags;
+
+    /**
+     * MPEG vs JPEG YUV range.
+     * - encoding: Set by user
+     * - decoding: Set by libavcodec
+     */
+    enum AVColorRange color_range;
+
+    enum AVColorPrimaries color_primaries;
+
+    enum AVColorTransferCharacteristic color_trc;
+
+    /**
+     * YUV colorspace type.
+     * - encoding: Set by user
+     * - decoding: Set by libavcodec
+     */
+    enum AVColorSpace colorspace;
+
+    enum AVChromaLocation chroma_location;
+
+    /**
+     * frame timestamp estimated using various heuristics, in stream time base
+     * - encoding: unused
+     * - decoding: set by libavcodec, read by user.
+     */
+    int64_t best_effort_timestamp;
+
+#if FF_API_FRAME_PKT
+    /**
+     * reordered pos from the last AVPacket that has been input into the decoder
+     * - encoding: unused
+     * - decoding: Read by user.
+     * @deprecated use AV_CODEC_FLAG_COPY_OPAQUE to pass through arbitrary user
+     *             data from packets to frames
+     */
+    attribute_deprecated
+    int64_t pkt_pos;
+#endif
+
+    /**
+     * metadata.
+     * - encoding: Set by user.
+     * - decoding: Set by libavcodec.
+     */
+    AVDictionary *metadata;
+
+    /**
+     * decode error flags of the frame, set to a combination of
+     * FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there
+     * were errors during the decoding.
+     * - encoding: unused
+     * - decoding: set by libavcodec, read by user.
+     */
+    int decode_error_flags;
+#define FF_DECODE_ERROR_INVALID_BITSTREAM   1
+#define FF_DECODE_ERROR_MISSING_REFERENCE   2
+#define FF_DECODE_ERROR_CONCEALMENT_ACTIVE  4
+#define FF_DECODE_ERROR_DECODE_SLICES       8
+
+#if FF_API_FRAME_PKT
+    /**
+     * size of the corresponding packet containing the compressed
+     * frame.
+     * It is set to a negative value if unknown.
+     * - encoding: unused
+     * - decoding: set by libavcodec, read by user.
+     * @deprecated use AV_CODEC_FLAG_COPY_OPAQUE to pass through arbitrary user
+     *             data from packets to frames
+     */
+    attribute_deprecated
+    int pkt_size;
+#endif
+
+    /**
+     * For hwaccel-format frames, this should be a reference to the
+     * AVHWFramesContext describing the frame.
+     */
+    AVBufferRef *hw_frames_ctx;
+
+    /**
+     * Frame owner's private data.
+     *
+     * This field may be set by the code that allocates/owns the frame data.
+     * It is then not touched by any library functions, except:
+     * - a new reference to the underlying buffer is propagated by
+     *   av_frame_copy_props() (and hence by av_frame_ref());
+     * - it is unreferenced in av_frame_unref();
+     * - on the caller's explicit request. E.g. libavcodec encoders/decoders
+     *   will propagate a new reference to/from @ref AVPacket "AVPackets" if the
+     *   caller sets @ref AV_CODEC_FLAG_COPY_OPAQUE.
+     *
+     * @see opaque the plain pointer analogue
+     */
+    AVBufferRef *opaque_ref;
+
+    /**
+     * @anchor cropping
+     * @name Cropping
+     * Video frames only. The number of pixels to discard from the the
+     * top/bottom/left/right border of the frame to obtain the sub-rectangle of
+     * the frame intended for presentation.
+     * @{
+     */
+    size_t crop_top;
+    size_t crop_bottom;
+    size_t crop_left;
+    size_t crop_right;
+    /**
+     * @}
+     */
+
+    /**
+     * AVBufferRef for internal use by a single libav* library.
+     * Must not be used to transfer data between libraries.
+     * Has to be NULL when ownership of the frame leaves the respective library.
+     *
+     * Code outside the FFmpeg libs should never check or change the contents of the buffer ref.
+     *
+     * FFmpeg calls av_buffer_unref() on it when the frame is unreferenced.
+     * av_frame_copy_props() calls create a new reference with av_buffer_ref()
+     * for the target frame's private_ref field.
+     */
+    AVBufferRef *private_ref;
+
+    /**
+     * Channel layout of the audio data.
+     */
+    AVChannelLayout ch_layout;
+
+    /**
+     * Duration of the frame, in the same units as pts. 0 if unknown.
+     */
+    int64_t duration;
+} AVFrame;
+
+
+/**
+ * Allocate an AVFrame and set its fields to default values.  The resulting
+ * struct must be freed using av_frame_free().
+ *
+ * @return An AVFrame filled with default values or NULL on failure.
+ *
+ * @note this only allocates the AVFrame itself, not the data buffers. Those
+ * must be allocated through other means, e.g. with av_frame_get_buffer() or
+ * manually.
+ */
+AVFrame *av_frame_alloc(void);
+
+/**
+ * Free the frame and any dynamically allocated objects in it,
+ * e.g. extended_data. If the frame is reference counted, it will be
+ * unreferenced first.
+ *
+ * @param frame frame to be freed. The pointer will be set to NULL.
+ */
+void av_frame_free(AVFrame **frame);
+
+/**
+ * Set up a new reference to the data described by the source frame.
+ *
+ * Copy frame properties from src to dst and create a new reference for each
+ * AVBufferRef from src.
+ *
+ * If src is not reference counted, new buffers are allocated and the data is
+ * copied.
+ *
+ * @warning: dst MUST have been either unreferenced with av_frame_unref(dst),
+ *           or newly allocated with av_frame_alloc() before calling this
+ *           function, or undefined behavior will occur.
+ *
+ * @return 0 on success, a negative AVERROR on error
+ */
+int av_frame_ref(AVFrame *dst, const AVFrame *src);
+
+/**
+ * Ensure the destination frame refers to the same data described by the source
+ * frame, either by creating a new reference for each AVBufferRef from src if
+ * they differ from those in dst, by allocating new buffers and copying data if
+ * src is not reference counted, or by unrefencing it if src is empty.
+ *
+ * Frame properties on dst will be replaced by those from src.
+ *
+ * @return 0 on success, a negative AVERROR on error. On error, dst is
+ *         unreferenced.
+ */
+int av_frame_replace(AVFrame *dst, const AVFrame *src);
+
+/**
+ * Create a new frame that references the same data as src.
+ *
+ * This is a shortcut for av_frame_alloc()+av_frame_ref().
+ *
+ * @return newly created AVFrame on success, NULL on error.
+ */
+AVFrame *av_frame_clone(const AVFrame *src);
+
+/**
+ * Unreference all the buffers referenced by frame and reset the frame fields.
+ */
+void av_frame_unref(AVFrame *frame);
+
+/**
+ * Move everything contained in src to dst and reset src.
+ *
+ * @warning: dst is not unreferenced, but directly overwritten without reading
+ *           or deallocating its contents. Call av_frame_unref(dst) manually
+ *           before calling this function to ensure that no memory is leaked.
+ */
+void av_frame_move_ref(AVFrame *dst, AVFrame *src);
+
+/**
+ * Allocate new buffer(s) for audio or video data.
+ *
+ * The following fields must be set on frame before calling this function:
+ * - format (pixel format for video, sample format for audio)
+ * - width and height for video
+ * - nb_samples and ch_layout for audio
+ *
+ * This function will fill AVFrame.data and AVFrame.buf arrays and, if
+ * necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf.
+ * For planar formats, one buffer will be allocated for each plane.
+ *
+ * @warning: if frame already has been allocated, calling this function will
+ *           leak memory. In addition, undefined behavior can occur in certain
+ *           cases.
+ *
+ * @param frame frame in which to store the new buffers.
+ * @param align Required buffer size and data pointer alignment. If equal to 0,
+ *              alignment will be chosen automatically for the current CPU.
+ *              It is highly recommended to pass 0 here unless you know what
+ *              you are doing.
+ *
+ * @return 0 on success, a negative AVERROR on error.
+ */
+int av_frame_get_buffer(AVFrame *frame, int align);
+
+/**
+ * Check if the frame data is writable.
+ *
+ * @return A positive value if the frame data is writable (which is true if and
+ * only if each of the underlying buffers has only one reference, namely the one
+ * stored in this frame). Return 0 otherwise.
+ *
+ * If 1 is returned the answer is valid until av_buffer_ref() is called on any
+ * of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly).
+ *
+ * @see av_frame_make_writable(), av_buffer_is_writable()
+ */
+int av_frame_is_writable(AVFrame *frame);
+
+/**
+ * Ensure that the frame data is writable, avoiding data copy if possible.
+ *
+ * Do nothing if the frame is writable, allocate new buffers and copy the data
+ * if it is not. Non-refcounted frames behave as non-writable, i.e. a copy
+ * is always made.
+ *
+ * @return 0 on success, a negative AVERROR on error.
+ *
+ * @see av_frame_is_writable(), av_buffer_is_writable(),
+ * av_buffer_make_writable()
+ */
+int av_frame_make_writable(AVFrame *frame);
+
+/**
+ * Copy the frame data from src to dst.
+ *
+ * This function does not allocate anything, dst must be already initialized and
+ * allocated with the same parameters as src.
+ *
+ * This function only copies the frame data (i.e. the contents of the data /
+ * extended data arrays), not any other properties.
+ *
+ * @return >= 0 on success, a negative AVERROR on error.
+ */
+int av_frame_copy(AVFrame *dst, const AVFrame *src);
+
+/**
+ * Copy only "metadata" fields from src to dst.
+ *
+ * Metadata for the purpose of this function are those fields that do not affect
+ * the data layout in the buffers.  E.g. pts, sample rate (for audio) or sample
+ * aspect ratio (for video), but not width/height or channel layout.
+ * Side data is also copied.
+ */
+int av_frame_copy_props(AVFrame *dst, const AVFrame *src);
+
+/**
+ * Get the buffer reference a given data plane is stored in.
+ *
+ * @param frame the frame to get the plane's buffer from
+ * @param plane index of the data plane of interest in frame->extended_data.
+ *
+ * @return the buffer reference that contains the plane or NULL if the input
+ * frame is not valid.
+ */
+AVBufferRef *av_frame_get_plane_buffer(const AVFrame *frame, int plane);
+
+/**
+ * Add a new side data to a frame.
+ *
+ * @param frame a frame to which the side data should be added
+ * @param type type of the added side data
+ * @param size size of the side data
+ *
+ * @return newly added side data on success, NULL on error
+ */
+AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
+                                        enum AVFrameSideDataType type,
+                                        size_t size);
+
+/**
+ * Add a new side data to a frame from an existing AVBufferRef
+ *
+ * @param frame a frame to which the side data should be added
+ * @param type  the type of the added side data
+ * @param buf   an AVBufferRef to add as side data. The ownership of
+ *              the reference is transferred to the frame.
+ *
+ * @return newly added side data on success, NULL on error. On failure
+ *         the frame is unchanged and the AVBufferRef remains owned by
+ *         the caller.
+ */
+AVFrameSideData *av_frame_new_side_data_from_buf(AVFrame *frame,
+                                                 enum AVFrameSideDataType type,
+                                                 AVBufferRef *buf);
+
+/**
+ * @return a pointer to the side data of a given type on success, NULL if there
+ * is no side data with such type in this frame.
+ */
+AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
+                                        enum AVFrameSideDataType type);
+
+/**
+ * Remove and free all side data instances of the given type.
+ */
+void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type);
+
+
+/**
+ * Flags for frame cropping.
+ */
+enum {
+    /**
+     * Apply the maximum possible cropping, even if it requires setting the
+     * AVFrame.data[] entries to unaligned pointers. Passing unaligned data
+     * to FFmpeg API is generally not allowed, and causes undefined behavior
+     * (such as crashes). You can pass unaligned data only to FFmpeg APIs that
+     * are explicitly documented to accept it. Use this flag only if you
+     * absolutely know what you are doing.
+     */
+    AV_FRAME_CROP_UNALIGNED     = 1 << 0,
+};
+
+/**
+ * Crop the given video AVFrame according to its crop_left/crop_top/crop_right/
+ * crop_bottom fields. If cropping is successful, the function will adjust the
+ * data pointers and the width/height fields, and set the crop fields to 0.
+ *
+ * In all cases, the cropping boundaries will be rounded to the inherent
+ * alignment of the pixel format. In some cases, such as for opaque hwaccel
+ * formats, the left/top cropping is ignored. The crop fields are set to 0 even
+ * if the cropping was rounded or ignored.
+ *
+ * @param frame the frame which should be cropped
+ * @param flags Some combination of AV_FRAME_CROP_* flags, or 0.
+ *
+ * @return >= 0 on success, a negative AVERROR on error. If the cropping fields
+ * were invalid, AVERROR(ERANGE) is returned, and nothing is changed.
+ */
+int av_frame_apply_cropping(AVFrame *frame, int flags);
+
+/**
+ * @return a string identifying the side data type
+ */
+const char *av_frame_side_data_name(enum AVFrameSideDataType type);
+
+/**
+ * @return side data descriptor corresponding to a given side data type, NULL
+ *         when not available.
+ */
+const AVSideDataDescriptor *av_frame_side_data_desc(enum AVFrameSideDataType type);
+
+/**
+ * Free all side data entries and their contents, then zeroes out the
+ * values which the pointers are pointing to.
+ *
+ * @param sd    pointer to array of side data to free. Will be set to NULL
+ *              upon return.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array. Will be set to 0 upon return.
+ */
+void av_frame_side_data_free(AVFrameSideData ***sd, int *nb_sd);
+
+/**
+ * Remove existing entries before adding new ones.
+ */
+#define AV_FRAME_SIDE_DATA_FLAG_UNIQUE (1 << 0)
+/**
+ * Don't add a new entry if another of the same type exists.
+ * Applies only for side data types without the AV_SIDE_DATA_PROP_MULTI prop.
+ */
+#define AV_FRAME_SIDE_DATA_FLAG_REPLACE (1 << 1)
+
+/**
+ * Add new side data entry to an array.
+ *
+ * @param sd    pointer to array of side data to which to add another entry,
+ *              or to NULL in order to start a new array.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array.
+ * @param type  type of the added side data
+ * @param size  size of the side data
+ * @param flags Some combination of AV_FRAME_SIDE_DATA_FLAG_* flags, or 0.
+ *
+ * @return newly added side data on success, NULL on error.
+ * @note In case of AV_FRAME_SIDE_DATA_FLAG_UNIQUE being set, entries of
+ *       matching AVFrameSideDataType will be removed before the addition
+ *       is attempted.
+ * @note In case of AV_FRAME_SIDE_DATA_FLAG_REPLACE being set, if an
+ *       entry of the same type already exists, it will be replaced instead.
+ */
+AVFrameSideData *av_frame_side_data_new(AVFrameSideData ***sd, int *nb_sd,
+                                        enum AVFrameSideDataType type,
+                                        size_t size, unsigned int flags);
+
+/**
+ * Add a new side data entry to an array from an existing AVBufferRef.
+ *
+ * @param sd    pointer to array of side data to which to add another entry,
+ *              or to NULL in order to start a new array.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array.
+ * @param type  type of the added side data
+ * @param buf   Pointer to AVBufferRef to add to the array. On success,
+ *              the function takes ownership of the AVBufferRef and *buf is
+ *              set to NULL, unless AV_FRAME_SIDE_DATA_FLAG_NEW_REF is set
+ *              in which case the ownership will remain with the caller.
+ * @param flags Some combination of AV_FRAME_SIDE_DATA_FLAG_* flags, or 0.
+ *
+ * @return newly added side data on success, NULL on error.
+ * @note In case of AV_FRAME_SIDE_DATA_FLAG_UNIQUE being set, entries of
+ *       matching AVFrameSideDataType will be removed before the addition
+ *       is attempted.
+ * @note In case of AV_FRAME_SIDE_DATA_FLAG_REPLACE being set, if an
+ *       entry of the same type already exists, it will be replaced instead.
+ *
+ */
+AVFrameSideData *av_frame_side_data_add(AVFrameSideData ***sd, int *nb_sd,
+                                        enum AVFrameSideDataType type,
+                                        AVBufferRef **buf, unsigned int flags);
+
+/**
+ * Add a new side data entry to an array based on existing side data, taking
+ * a reference towards the contained AVBufferRef.
+ *
+ * @param sd    pointer to array of side data to which to add another entry,
+ *              or to NULL in order to start a new array.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array.
+ * @param src   side data to be cloned, with a new reference utilized
+ *              for the buffer.
+ * @param flags Some combination of AV_FRAME_SIDE_DATA_FLAG_* flags, or 0.
+ *
+ * @return negative error code on failure, >=0 on success.
+ * @note In case of AV_FRAME_SIDE_DATA_FLAG_UNIQUE being set, entries of
+ *       matching AVFrameSideDataType will be removed before the addition
+ *       is attempted.
+ * @note In case of AV_FRAME_SIDE_DATA_FLAG_REPLACE being set, if an
+ *       entry of the same type already exists, it will be replaced instead.
+ */
+int av_frame_side_data_clone(AVFrameSideData ***sd, int *nb_sd,
+                             const AVFrameSideData *src, unsigned int flags);
+
+/**
+ * Get a side data entry of a specific type from an array.
+ *
+ * @param sd    array of side data.
+ * @param nb_sd integer containing the number of entries in the array.
+ * @param type  type of side data to be queried
+ *
+ * @return a pointer to the side data of a given type on success, NULL if there
+ *         is no side data with such type in this set.
+ */
+const AVFrameSideData *av_frame_side_data_get_c(const AVFrameSideData * const *sd,
+                                                const int nb_sd,
+                                                enum AVFrameSideDataType type);
+
+/**
+ * Wrapper around av_frame_side_data_get_c() to workaround the limitation
+ * that for any type T the conversion from T * const * to const T * const *
+ * is not performed automatically in C.
+ * @see av_frame_side_data_get_c()
+ */
+static inline
+const AVFrameSideData *av_frame_side_data_get(AVFrameSideData * const *sd,
+                                              const int nb_sd,
+                                              enum AVFrameSideDataType type)
+{
+    return av_frame_side_data_get_c((const AVFrameSideData * const *)sd,
+                                    nb_sd, type);
+}
+
+/**
+ * Remove and free all side data instances of the given type from an array.
+ */
+void av_frame_side_data_remove(AVFrameSideData ***sd, int *nb_sd,
+                               enum AVFrameSideDataType type);
+
+/**
+ * Remove and free all side data instances that match any of the given
+ * side data properties. (See enum AVSideDataProps)
+ */
+void av_frame_side_data_remove_by_props(AVFrameSideData ***sd, int *nb_sd,
+                                        int props);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_FRAME_H */

ffmpeg/include/libavutil/hash.h

@@ -0,0 +1,264 @@
+/*
+ * Copyright (C) 2013 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_hash_generic
+ * Generic hashing API
+ */
+
+#ifndef AVUTIL_HASH_H
+#define AVUTIL_HASH_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_hash Hash Functions
+ * @ingroup lavu_crypto
+ * Hash functions useful in multimedia.
+ *
+ * Hash functions are widely used in multimedia, from error checking and
+ * concealment to internal regression testing. libavutil has efficient
+ * implementations of a variety of hash functions that may be useful for
+ * FFmpeg and other multimedia applications.
+ *
+ * @{
+ *
+ * @defgroup lavu_hash_generic Generic Hashing API
+ * An abstraction layer for all hash functions supported by libavutil.
+ *
+ * If your application needs to support a wide range of different hash
+ * functions, then the Generic Hashing API is for you. It provides a generic,
+ * reusable API for @ref lavu_hash "all hash functions" implemented in libavutil.
+ * If you just need to use one particular hash function, use the @ref lavu_hash
+ * "individual hash" directly.
+ *
+ * @section Sample Code
+ *
+ * A basic template for using the Generic Hashing API follows:
+ *
+ * @code
+ * struct AVHashContext *ctx = NULL;
+ * const char *hash_name = NULL;
+ * uint8_t *output_buf = NULL;
+ *
+ * // Select from a string returned by av_hash_names()
+ * hash_name = ...;
+ *
+ * // Allocate a hash context
+ * ret = av_hash_alloc(&ctx, hash_name);
+ * if (ret < 0)
+ *     return ret;
+ *
+ * // Initialize the hash context
+ * av_hash_init(ctx);
+ *
+ * // Update the hash context with data
+ * while (data_left) {
+ *     av_hash_update(ctx, data, size);
+ * }
+ *
+ * // Now we have no more data, so it is time to finalize the hash and get the
+ * // output. But we need to first allocate an output buffer. Note that you can
+ * // use any memory allocation function, including malloc(), not just
+ * // av_malloc().
+ * output_buf = av_malloc(av_hash_get_size(ctx));
+ * if (!output_buf)
+ *     return AVERROR(ENOMEM);
+ *
+ * // Finalize the hash context.
+ * // You can use any of the av_hash_final*() functions provided, for other
+ * // output formats. If you do so, be sure to adjust the memory allocation
+ * // above. See the function documentation below for the exact amount of extra
+ * // memory needed.
+ * av_hash_final(ctx, output_buffer);
+ *
+ * // Free the context
+ * av_hash_freep(&ctx);
+ * @endcode
+ *
+ * @section Hash Function-Specific Information
+ * If the CRC32 hash is selected, the #AV_CRC_32_IEEE polynomial will be
+ * used.
+ *
+ * If the Murmur3 hash is selected, the default seed will be used. See @ref
+ * lavu_murmur3_seedinfo "Murmur3" for more information.
+ *
+ * @{
+ */
+
+/**
+ * @example ffhash.c
+ * This example is a simple command line application that takes one or more
+ * arguments. It demonstrates a typical use of the hashing API with allocation,
+ * initialization, updating, and finalizing.
+ */
+
+struct AVHashContext;
+
+/**
+ * Allocate a hash context for the algorithm specified by name.
+ *
+ * @return  >= 0 for success, a negative error code for failure
+ *
+ * @note The context is not initialized after a call to this function; you must
+ * call av_hash_init() to do so.
+ */
+int av_hash_alloc(struct AVHashContext **ctx, const char *name);
+
+/**
+ * Get the names of available hash algorithms.
+ *
+ * This function can be used to enumerate the algorithms.
+ *
+ * @param[in] i  Index of the hash algorithm, starting from 0
+ * @return       Pointer to a static string or `NULL` if `i` is out of range
+ */
+const char *av_hash_names(int i);
+
+/**
+ * Get the name of the algorithm corresponding to the given hash context.
+ */
+const char *av_hash_get_name(const struct AVHashContext *ctx);
+
+/**
+ * Maximum value that av_hash_get_size() will currently return.
+ *
+ * You can use this if you absolutely want or need to use static allocation for
+ * the output buffer and are fine with not supporting hashes newly added to
+ * libavutil without recompilation.
+ *
+ * @warning
+ * Adding new hashes with larger sizes, and increasing the macro while doing
+ * so, will not be considered an ABI change. To prevent your code from
+ * overflowing a buffer, either dynamically allocate the output buffer with
+ * av_hash_get_size(), or limit your use of the Hashing API to hashes that are
+ * already in FFmpeg during the time of compilation.
+ */
+#define AV_HASH_MAX_SIZE 64
+
+/**
+ * Get the size of the resulting hash value in bytes.
+ *
+ * The maximum value this function will currently return is available as macro
+ * #AV_HASH_MAX_SIZE.
+ *
+ * @param[in]     ctx Hash context
+ * @return            Size of the hash value in bytes
+ */
+int av_hash_get_size(const struct AVHashContext *ctx);
+
+/**
+ * Initialize or reset a hash context.
+ *
+ * @param[in,out] ctx Hash context
+ */
+void av_hash_init(struct AVHashContext *ctx);
+
+/**
+ * Update a hash context with additional data.
+ *
+ * @param[in,out] ctx Hash context
+ * @param[in]     src Data to be added to the hash context
+ * @param[in]     len Size of the additional data
+ */
+void av_hash_update(struct AVHashContext *ctx, const uint8_t *src, size_t len);
+
+/**
+ * Finalize a hash context and compute the actual hash value.
+ *
+ * The minimum size of `dst` buffer is given by av_hash_get_size() or
+ * #AV_HASH_MAX_SIZE. The use of the latter macro is discouraged.
+ *
+ * It is not safe to update or finalize a hash context again, if it has already
+ * been finalized.
+ *
+ * @param[in,out] ctx Hash context
+ * @param[out]    dst Where the final hash value will be stored
+ *
+ * @see av_hash_final_bin() provides an alternative API
+ */
+void av_hash_final(struct AVHashContext *ctx, uint8_t *dst);
+
+/**
+ * Finalize a hash context and store the actual hash value in a buffer.
+ *
+ * It is not safe to update or finalize a hash context again, if it has already
+ * been finalized.
+ *
+ * If `size` is smaller than the hash size (given by av_hash_get_size()), the
+ * hash is truncated; if size is larger, the buffer is padded with 0.
+ *
+ * @param[in,out] ctx  Hash context
+ * @param[out]    dst  Where the final hash value will be stored
+ * @param[in]     size Number of bytes to write to `dst`
+ */
+void av_hash_final_bin(struct AVHashContext *ctx, uint8_t *dst, int size);
+
+/**
+ * Finalize a hash context and store the hexadecimal representation of the
+ * actual hash value as a string.
+ *
+ * It is not safe to update or finalize a hash context again, if it has already
+ * been finalized.
+ *
+ * The string is always 0-terminated.
+ *
+ * If `size` is smaller than `2 * hash_size + 1`, where `hash_size` is the
+ * value returned by av_hash_get_size(), the string will be truncated.
+ *
+ * @param[in,out] ctx  Hash context
+ * @param[out]    dst  Where the string will be stored
+ * @param[in]     size Maximum number of bytes to write to `dst`
+ */
+void av_hash_final_hex(struct AVHashContext *ctx, uint8_t *dst, int size);
+
+/**
+ * Finalize a hash context and store the Base64 representation of the
+ * actual hash value as a string.
+ *
+ * It is not safe to update or finalize a hash context again, if it has already
+ * been finalized.
+ *
+ * The string is always 0-terminated.
+ *
+ * If `size` is smaller than AV_BASE64_SIZE(hash_size), where `hash_size` is
+ * the value returned by av_hash_get_size(), the string will be truncated.
+ *
+ * @param[in,out] ctx  Hash context
+ * @param[out]    dst  Where the final hash value will be stored
+ * @param[in]     size Maximum number of bytes to write to `dst`
+ */
+void av_hash_final_b64(struct AVHashContext *ctx, uint8_t *dst, int size);
+
+/**
+ * Free hash context and set hash context pointer to `NULL`.
+ *
+ * @param[in,out] ctx  Pointer to hash context
+ */
+void av_hash_freep(struct AVHashContext **ctx);
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* AVUTIL_HASH_H */

ffmpeg/include/libavutil/hdr_dynamic_metadata.h

@@ -0,0 +1,376 @@
+/*
+ * Copyright (c) 2018 Mohammad Izadi <moh.izadi at gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HDR_DYNAMIC_METADATA_H
+#define AVUTIL_HDR_DYNAMIC_METADATA_H
+
+#include "frame.h"
+#include "rational.h"
+
+/**
+ * Option for overlapping elliptical pixel selectors in an image.
+ */
+enum AVHDRPlusOverlapProcessOption {
+    AV_HDR_PLUS_OVERLAP_PROCESS_WEIGHTED_AVERAGING = 0,
+    AV_HDR_PLUS_OVERLAP_PROCESS_LAYERING = 1,
+};
+
+/**
+ * Represents the percentile at a specific percentage in
+ * a distribution.
+ */
+typedef struct AVHDRPlusPercentile {
+    /**
+     * The percentage value corresponding to a specific percentile linearized
+     * RGB value in the processing window in the scene. The value shall be in
+     * the range of 0 to100, inclusive.
+     */
+    uint8_t percentage;
+
+    /**
+     * The linearized maxRGB value at a specific percentile in the processing
+     * window in the scene. The value shall be in the range of 0 to 1, inclusive
+     * and in multiples of 0.00001.
+     */
+    AVRational percentile;
+} AVHDRPlusPercentile;
+
+/**
+ * Color transform parameters at a processing window in a dynamic metadata for
+ * SMPTE 2094-40.
+ */
+typedef struct AVHDRPlusColorTransformParams {
+    /**
+     * The relative x coordinate of the top left pixel of the processing
+     * window. The value shall be in the range of 0 and 1, inclusive and
+     * in multiples of 1/(width of Picture - 1). The value 1 corresponds
+     * to the absolute coordinate of width of Picture - 1. The value for
+     * first processing window shall be 0.
+     */
+    AVRational window_upper_left_corner_x;
+
+    /**
+     * The relative y coordinate of the top left pixel of the processing
+     * window. The value shall be in the range of 0 and 1, inclusive and
+     * in multiples of 1/(height of Picture - 1). The value 1 corresponds
+     * to the absolute coordinate of height of Picture - 1. The value for
+     * first processing window shall be 0.
+     */
+    AVRational window_upper_left_corner_y;
+
+    /**
+     * The relative x coordinate of the bottom right pixel of the processing
+     * window. The value shall be in the range of 0 and 1, inclusive and
+     * in multiples of 1/(width of Picture - 1). The value 1 corresponds
+     * to the absolute coordinate of width of Picture - 1. The value for
+     * first processing window shall be 1.
+     */
+    AVRational window_lower_right_corner_x;
+
+    /**
+     * The relative y coordinate of the bottom right pixel of the processing
+     * window. The value shall be in the range of 0 and 1, inclusive and
+     * in multiples of 1/(height of Picture - 1). The value 1 corresponds
+     * to the absolute coordinate of height of Picture - 1. The value for
+     * first processing window shall be 1.
+     */
+    AVRational window_lower_right_corner_y;
+
+    /**
+     * The x coordinate of the center position of the concentric internal and
+     * external ellipses of the elliptical pixel selector in the processing
+     * window. The value shall be in the range of 0 to (width of Picture - 1),
+     * inclusive and in multiples of 1 pixel.
+     */
+    uint16_t center_of_ellipse_x;
+
+    /**
+     * The y coordinate of the center position of the concentric internal and
+     * external ellipses of the elliptical pixel selector in the processing
+     * window. The value shall be in the range of 0 to (height of Picture - 1),
+     * inclusive and in multiples of 1 pixel.
+     */
+    uint16_t center_of_ellipse_y;
+
+    /**
+     * The clockwise rotation angle in degree of arc with respect to the
+     * positive direction of the x-axis of the concentric internal and external
+     * ellipses of the elliptical pixel selector in the processing window. The
+     * value shall be in the range of 0 to 180, inclusive and in multiples of 1.
+     */
+    uint8_t rotation_angle;
+
+    /**
+     * The semi-major axis value of the internal ellipse of the elliptical pixel
+     * selector in amount of pixels in the processing window. The value shall be
+     * in the range of 1 to 65535, inclusive and in multiples of 1 pixel.
+     */
+    uint16_t semimajor_axis_internal_ellipse;
+
+    /**
+     * The semi-major axis value of the external ellipse of the elliptical pixel
+     * selector in amount of pixels in the processing window. The value
+     * shall not be less than semimajor_axis_internal_ellipse of the current
+     * processing window. The value shall be in the range of 1 to 65535,
+     * inclusive and in multiples of 1 pixel.
+     */
+    uint16_t semimajor_axis_external_ellipse;
+
+    /**
+     * The semi-minor axis value of the external ellipse of the elliptical pixel
+     * selector in amount of pixels in the processing window. The value shall be
+     * in the range of 1 to 65535, inclusive and in multiples of 1 pixel.
+     */
+    uint16_t semiminor_axis_external_ellipse;
+
+    /**
+     * Overlap process option indicates one of the two methods of combining
+     * rendered pixels in the processing window in an image with at least one
+     * elliptical pixel selector. For overlapping elliptical pixel selectors
+     * in an image, overlap_process_option shall have the same value.
+     */
+    enum AVHDRPlusOverlapProcessOption overlap_process_option;
+
+    /**
+     * The maximum of the color components of linearized RGB values in the
+     * processing window in the scene. The values should be in the range of 0 to
+     * 1, inclusive and in multiples of 0.00001. maxscl[ 0 ], maxscl[ 1 ], and
+     * maxscl[ 2 ] are corresponding to R, G, B color components respectively.
+     */
+    AVRational maxscl[3];
+
+    /**
+     * The average of linearized maxRGB values in the processing window in the
+     * scene. The value should be in the range of 0 to 1, inclusive and in
+     * multiples of 0.00001.
+     */
+    AVRational average_maxrgb;
+
+    /**
+     * The number of linearized maxRGB values at given percentiles in the
+     * processing window in the scene. The maximum value shall be 15.
+     */
+    uint8_t num_distribution_maxrgb_percentiles;
+
+    /**
+     * The linearized maxRGB values at given percentiles in the
+     * processing window in the scene.
+     */
+    AVHDRPlusPercentile distribution_maxrgb[15];
+
+    /**
+     * The fraction of selected pixels in the image that contains the brightest
+     * pixel in the scene. The value shall be in the range of 0 to 1, inclusive
+     * and in multiples of 0.001.
+     */
+    AVRational fraction_bright_pixels;
+
+    /**
+     * This flag indicates that the metadata for the tone mapping function in
+     * the processing window is present (for value of 1).
+     */
+    uint8_t tone_mapping_flag;
+
+    /**
+     * The x coordinate of the separation point between the linear part and the
+     * curved part of the tone mapping function. The value shall be in the range
+     * of 0 to 1, excluding 0 and in multiples of 1/4095.
+     */
+    AVRational knee_point_x;
+
+    /**
+     * The y coordinate of the separation point between the linear part and the
+     * curved part of the tone mapping function. The value shall be in the range
+     * of 0 to 1, excluding 0 and in multiples of 1/4095.
+     */
+    AVRational knee_point_y;
+
+    /**
+     * The number of the intermediate anchor parameters of the tone mapping
+     * function in the processing window. The maximum value shall be 15.
+     */
+    uint8_t num_bezier_curve_anchors;
+
+    /**
+     * The intermediate anchor parameters of the tone mapping function in the
+     * processing window in the scene. The values should be in the range of 0
+     * to 1, inclusive and in multiples of 1/1023.
+     */
+    AVRational bezier_curve_anchors[15];
+
+    /**
+     * This flag shall be equal to 0 in bitstreams conforming to this version of
+     * this Specification. Other values are reserved for future use.
+     */
+    uint8_t color_saturation_mapping_flag;
+
+    /**
+     * The color saturation gain in the processing window in the scene. The
+     * value shall be in the range of 0 to 63/8, inclusive and in multiples of
+     * 1/8. The default value shall be 1.
+     */
+    AVRational color_saturation_weight;
+} AVHDRPlusColorTransformParams;
+
+/**
+ * This struct represents dynamic metadata for color volume transform -
+ * application 4 of SMPTE 2094-40:2016 standard.
+ *
+ * To be used as payload of a AVFrameSideData or AVPacketSideData with the
+ * appropriate type.
+ *
+ * @note The struct should be allocated with
+ * av_dynamic_hdr_plus_alloc() and its size is not a part of
+ * the public ABI.
+ */
+typedef struct AVDynamicHDRPlus {
+    /**
+     * Country code by Rec. ITU-T T.35 Annex A. The value shall be 0xB5.
+     */
+    uint8_t itu_t_t35_country_code;
+
+    /**
+     * Application version in the application defining document in ST-2094
+     * suite. The value shall be set to 0.
+     */
+    uint8_t application_version;
+
+    /**
+     * The number of processing windows. The value shall be in the range
+     * of 1 to 3, inclusive.
+     */
+    uint8_t num_windows;
+
+    /**
+     * The color transform parameters for every processing window.
+     */
+    AVHDRPlusColorTransformParams params[3];
+
+    /**
+     * The nominal maximum display luminance of the targeted system display,
+     * in units of 0.0001 candelas per square metre. The value shall be in
+     * the range of 0 to 10000, inclusive.
+     */
+    AVRational targeted_system_display_maximum_luminance;
+
+    /**
+     * This flag shall be equal to 0 in bit streams conforming to this version
+     * of this Specification. The value 1 is reserved for future use.
+     */
+    uint8_t targeted_system_display_actual_peak_luminance_flag;
+
+    /**
+     * The number of rows in the targeted system_display_actual_peak_luminance
+     * array. The value shall be in the range of 2 to 25, inclusive.
+     */
+    uint8_t num_rows_targeted_system_display_actual_peak_luminance;
+
+    /**
+     * The number of columns in the
+     * targeted_system_display_actual_peak_luminance array. The value shall be
+     * in the range of 2 to 25, inclusive.
+     */
+    uint8_t num_cols_targeted_system_display_actual_peak_luminance;
+
+    /**
+     * The normalized actual peak luminance of the targeted system display. The
+     * values should be in the range of 0 to 1, inclusive and in multiples of
+     * 1/15.
+     */
+    AVRational targeted_system_display_actual_peak_luminance[25][25];
+
+    /**
+     * This flag shall be equal to 0 in bitstreams conforming to this version of
+     * this Specification. The value 1 is reserved for future use.
+     */
+    uint8_t mastering_display_actual_peak_luminance_flag;
+
+    /**
+     * The number of rows in the mastering_display_actual_peak_luminance array.
+     * The value shall be in the range of 2 to 25, inclusive.
+     */
+    uint8_t num_rows_mastering_display_actual_peak_luminance;
+
+    /**
+     * The number of columns in the mastering_display_actual_peak_luminance
+     * array. The value shall be in the range of 2 to 25, inclusive.
+     */
+    uint8_t num_cols_mastering_display_actual_peak_luminance;
+
+    /**
+     * The normalized actual peak luminance of the mastering display used for
+     * mastering the image essence. The values should be in the range of 0 to 1,
+     * inclusive and in multiples of 1/15.
+     */
+    AVRational mastering_display_actual_peak_luminance[25][25];
+} AVDynamicHDRPlus;
+
+/**
+ * Allocate an AVDynamicHDRPlus structure and set its fields to
+ * default values. The resulting struct can be freed using av_freep().
+ *
+ * @return An AVDynamicHDRPlus filled with default values or NULL
+ *         on failure.
+ */
+AVDynamicHDRPlus *av_dynamic_hdr_plus_alloc(size_t *size);
+
+/**
+ * Allocate a complete AVDynamicHDRPlus and add it to the frame.
+ * @param frame The frame which side data is added to.
+ *
+ * @return The AVDynamicHDRPlus structure to be filled by caller or NULL
+ *         on failure.
+ */
+AVDynamicHDRPlus *av_dynamic_hdr_plus_create_side_data(AVFrame *frame);
+
+/**
+ * Parse the user data registered ITU-T T.35 to AVbuffer (AVDynamicHDRPlus).
+ * The T.35 buffer must begin with the application mode, skipping the
+ * country code, terminal provider codes, and application identifier.
+ * @param s A pointer containing the decoded AVDynamicHDRPlus structure.
+ * @param data The byte array containing the raw ITU-T T.35 data.
+ * @param size Size of the data array in bytes.
+ *
+ * @return >= 0 on success. Otherwise, returns the appropriate AVERROR.
+ */
+int av_dynamic_hdr_plus_from_t35(AVDynamicHDRPlus *s, const uint8_t *data,
+                                 size_t size);
+
+#define AV_HDR_PLUS_MAX_PAYLOAD_SIZE 907
+
+/**
+ * Serialize dynamic HDR10+ metadata to a user data registered ITU-T T.35 buffer,
+ * excluding the first 48 bytes of the header, and beginning with the application mode.
+ * @param s A pointer containing the decoded AVDynamicHDRPlus structure.
+ * @param[in,out] data A pointer to pointer to a byte buffer to be filled with the
+ *                     serialized metadata.
+ *                     If *data is NULL, a buffer be will be allocated and a pointer to
+ *                     it stored in its place. The caller assumes ownership of the buffer.
+ *                     May be NULL, in which case the function will only store the
+ *                     required buffer size in *size.
+ * @param[in,out] size A pointer to a size to be set to the returned buffer's size.
+ *                     If *data is not NULL, *size must contain the size of the input
+ *                     buffer. May be NULL only if *data is NULL.
+ *
+ * @return >= 0 on success. Otherwise, returns the appropriate AVERROR.
+ */
+int av_dynamic_hdr_plus_to_t35(const AVDynamicHDRPlus *s, uint8_t **data, size_t *size);
+
+#endif /* AVUTIL_HDR_DYNAMIC_METADATA_H */

ffmpeg/include/libavutil/hdr_dynamic_vivid_metadata.h

@@ -0,0 +1,346 @@
+/*
+ * Copyright (c) 2021 Limin Wang <lance.lmwang at gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HDR_DYNAMIC_VIVID_METADATA_H
+#define AVUTIL_HDR_DYNAMIC_VIVID_METADATA_H
+
+#include "frame.h"
+#include "rational.h"
+
+/**
+ * HDR Vivid three spline params.
+ */
+typedef struct AVHDRVivid3SplineParams {
+    /**
+     * The mode of three Spline. the value shall be in the range
+     * of 0 to 3, inclusive.
+     */
+    int th_mode;
+
+    /**
+     * three_Spline_TH_enable_MB is in the range of 0.0 to 1.0, inclusive
+     * and in multiples of 1.0/255.
+     *
+     */
+    AVRational th_enable_mb;
+
+    /**
+     * 3Spline_TH_enable of three Spline.
+     * The value shall be in the range of 0.0 to 1.0, inclusive.
+     * and in multiples of 1.0/4095.
+     */
+    AVRational th_enable;
+
+    /**
+     * 3Spline_TH_Delta1 of three Spline.
+     * The value shall be in the range of 0.0 to 0.25, inclusive,
+     * and in multiples of 0.25/1023.
+     */
+    AVRational th_delta1;
+
+    /**
+     * 3Spline_TH_Delta2 of three Spline.
+     * The value shall be in the range of 0.0 to 0.25, inclusive,
+     * and in multiples of 0.25/1023.
+     */
+    AVRational th_delta2;
+
+    /**
+     * 3Spline_enable_Strength of three Spline.
+     * The value shall be in the range of 0.0 to 1.0, inclusive,
+     * and in multiples of 1.0/255.
+     */
+    AVRational enable_strength;
+} AVHDRVivid3SplineParams;
+
+/**
+ * Color tone mapping parameters at a processing window in a dynamic metadata for
+ * CUVA 005.1:2021.
+ */
+typedef struct AVHDRVividColorToneMappingParams {
+    /**
+     * The nominal maximum display luminance of the targeted system display,
+     * in multiples of 1.0/4095 candelas per square metre. The value shall be in
+     * the range of 0.0 to 1.0, inclusive.
+     */
+    AVRational targeted_system_display_maximum_luminance;
+
+    /**
+     * This flag indicates that transfer the base paramter(for value of 1)
+     */
+    int base_enable_flag;
+
+    /**
+     * base_param_m_p in the base parameter,
+     * in multiples of 1.0/16383. The value shall be in
+     * the range of 0.0 to 1.0, inclusive.
+     */
+    AVRational base_param_m_p;
+
+    /**
+     * base_param_m_m in the base parameter,
+     * in multiples of 1.0/10. The value shall be in
+     * the range of 0.0 to 6.3, inclusive.
+     */
+    AVRational base_param_m_m;
+
+    /**
+     * base_param_m_a in the base parameter,
+     * in multiples of 1.0/1023. The value shall be in
+     * the range of 0.0 to 1.0 inclusive.
+     */
+    AVRational base_param_m_a;
+
+    /**
+     * base_param_m_b in the base parameter,
+     * in multiples of 1/1023. The value shall be in
+     * the range of 0.0 to 1.0, inclusive.
+     */
+    AVRational base_param_m_b;
+
+    /**
+     * base_param_m_n in the base parameter,
+     * in multiples of 1.0/10. The value shall be in
+     * the range of 0.0 to 6.3, inclusive.
+     */
+    AVRational base_param_m_n;
+
+    /**
+     * indicates k1_0 in the base parameter,
+     * base_param_k1 <= 1: k1_0 = base_param_k1
+     * base_param_k1 > 1: reserved
+     */
+    int base_param_k1;
+
+    /**
+     * indicates k2_0 in the base parameter,
+     * base_param_k2 <= 1: k2_0 = base_param_k2
+     * base_param_k2 > 1: reserved
+     */
+    int base_param_k2;
+
+    /**
+     * indicates k3_0 in the base parameter,
+     * base_param_k3 == 1: k3_0 = base_param_k3
+     * base_param_k3 == 2: k3_0 = maximum_maxrgb
+     * base_param_k3 > 2: reserved
+     */
+    int base_param_k3;
+
+    /**
+     * This flag indicates that delta mode of base paramter(for value of 1)
+     */
+    int base_param_Delta_enable_mode;
+
+    /**
+     * base_param_Delta in the base parameter,
+     * in multiples of 1.0/127. The value shall be in
+     * the range of 0.0 to 1.0, inclusive.
+     */
+    AVRational base_param_Delta;
+
+    /**
+     * indicates 3Spline_enable_flag in the base parameter,
+     * This flag indicates that transfer three Spline of base paramter(for value of 1)
+     */
+    int three_Spline_enable_flag;
+
+    /**
+     * The number of three Spline. The value shall be in the range
+     * of 1 to 2, inclusive.
+     */
+    int three_Spline_num;
+
+#if FF_API_HDR_VIVID_THREE_SPLINE
+    /**
+     * The mode of three Spline. the value shall be in the range
+     * of 0 to 3, inclusive.
+     * @deprecated Use three_spline instead
+     */
+    attribute_deprecated
+    int three_Spline_TH_mode;
+
+    /**
+     * three_Spline_TH_enable_MB is in the range of 0.0 to 1.0, inclusive
+     * and in multiples of 1.0/255.
+     * @deprecated Use three_spline instead
+     */
+    attribute_deprecated
+    AVRational three_Spline_TH_enable_MB;
+
+    /**
+     * 3Spline_TH_enable of three Spline.
+     * The value shall be in the range of 0.0 to 1.0, inclusive.
+     * and in multiples of 1.0/4095.
+     * @deprecated Use three_spline instead
+     */
+    attribute_deprecated
+    AVRational three_Spline_TH_enable;
+
+    /**
+     * 3Spline_TH_Delta1 of three Spline.
+     * The value shall be in the range of 0.0 to 0.25, inclusive,
+     * and in multiples of 0.25/1023.
+     * @deprecated Use three_spline instead
+     */
+    attribute_deprecated
+    AVRational three_Spline_TH_Delta1;
+
+    /**
+     * 3Spline_TH_Delta2 of three Spline.
+     * The value shall be in the range of 0.0 to 0.25, inclusive,
+     * and in multiples of 0.25/1023.
+     * @deprecated Use three_spline instead
+     */
+    attribute_deprecated
+    AVRational three_Spline_TH_Delta2;
+
+    /**
+     * 3Spline_enable_Strength of three Spline.
+     * The value shall be in the range of 0.0 to 1.0, inclusive,
+     * and in multiples of 1.0/255.
+     * @deprecated Use three_spline instead
+     */
+    attribute_deprecated
+    AVRational three_Spline_enable_Strength;
+#endif
+
+    AVHDRVivid3SplineParams three_spline[2];
+} AVHDRVividColorToneMappingParams;
+
+
+/**
+ * Color transform parameters at a processing window in a dynamic metadata for
+ * CUVA 005.1:2021.
+ */
+typedef struct AVHDRVividColorTransformParams {
+    /**
+     * Indicates the minimum brightness of the displayed content.
+     * The values should be in the range of 0.0 to 1.0,
+     * inclusive and in multiples of 1/4095.
+     */
+    AVRational minimum_maxrgb;
+
+    /**
+     * Indicates the average brightness of the displayed content.
+     * The values should be in the range of 0.0 to 1.0,
+     * inclusive and in multiples of 1/4095.
+     */
+    AVRational average_maxrgb;
+
+    /**
+     * Indicates the variance brightness of the displayed content.
+     * The values should be in the range of 0.0 to 1.0,
+     * inclusive and in multiples of 1/4095.
+     */
+    AVRational variance_maxrgb;
+
+    /**
+     * Indicates the maximum brightness of the displayed content.
+     * The values should be in the range of 0.0 to 1.0, inclusive
+     * and in multiples of 1/4095.
+     */
+    AVRational maximum_maxrgb;
+
+    /**
+     * This flag indicates that the metadata for the tone mapping function in
+     * the processing window is present (for value of 1).
+     */
+    int tone_mapping_mode_flag;
+
+    /**
+     * The number of tone mapping param. The value shall be in the range
+     * of 1 to 2, inclusive.
+     */
+    int tone_mapping_param_num;
+
+    /**
+     * The color tone mapping parameters.
+     */
+    AVHDRVividColorToneMappingParams tm_params[2];
+
+    /**
+     * This flag indicates that the metadata for the color saturation mapping in
+     * the processing window is present (for value of 1).
+     */
+    int color_saturation_mapping_flag;
+
+    /**
+     * The number of color saturation param. The value shall be in the range
+     * of 0 to 7, inclusive.
+     */
+    int color_saturation_num;
+
+    /**
+     * Indicates the color correction strength parameter.
+     * The values should be in the range of 0.0 to 2.0, inclusive
+     * and in multiples of 1/128.
+     */
+    AVRational color_saturation_gain[8];
+} AVHDRVividColorTransformParams;
+
+/**
+ * This struct represents dynamic metadata for color volume transform -
+ * CUVA 005.1:2021 standard
+ *
+ * To be used as payload of a AVFrameSideData or AVPacketSideData with the
+ * appropriate type.
+ *
+ * @note The struct should be allocated with
+ * av_dynamic_hdr_vivid_alloc() and its size is not a part of
+ * the public ABI.
+ */
+typedef struct AVDynamicHDRVivid {
+    /**
+     * The system start code. The value shall be set to 0x01.
+     */
+    uint8_t system_start_code;
+
+    /**
+     * The number of processing windows. The value shall be set to 0x01
+     * if the system_start_code is 0x01.
+     */
+    uint8_t num_windows;
+
+    /**
+     * The color transform parameters for every processing window.
+     */
+    AVHDRVividColorTransformParams params[3];
+} AVDynamicHDRVivid;
+
+/**
+ * Allocate an AVDynamicHDRVivid structure and set its fields to
+ * default values. The resulting struct can be freed using av_freep().
+ *
+ * @return An AVDynamicHDRVivid filled with default values or NULL
+ *         on failure.
+ */
+AVDynamicHDRVivid *av_dynamic_hdr_vivid_alloc(size_t *size);
+
+/**
+ * Allocate a complete AVDynamicHDRVivid and add it to the frame.
+ * @param frame The frame which side data is added to.
+ *
+ * @return The AVDynamicHDRVivid structure to be filled by caller or NULL
+ *         on failure.
+ */
+AVDynamicHDRVivid *av_dynamic_hdr_vivid_create_side_data(AVFrame *frame);
+
+#endif /* AVUTIL_HDR_DYNAMIC_VIVID_METADATA_H */

ffmpeg/include/libavutil/hmac.h

@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2012 Martin Storsjo
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HMAC_H
+#define AVUTIL_HMAC_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_hmac HMAC
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+enum AVHMACType {
+    AV_HMAC_MD5,
+    AV_HMAC_SHA1,
+    AV_HMAC_SHA224,
+    AV_HMAC_SHA256,
+    AV_HMAC_SHA384,
+    AV_HMAC_SHA512,
+};
+
+typedef struct AVHMAC AVHMAC;
+
+/**
+ * Allocate an AVHMAC context.
+ * @param type The hash function used for the HMAC.
+ */
+AVHMAC *av_hmac_alloc(enum AVHMACType type);
+
+/**
+ * Free an AVHMAC context.
+ * @param ctx The context to free, may be NULL
+ */
+void av_hmac_free(AVHMAC *ctx);
+
+/**
+ * Initialize an AVHMAC context with an authentication key.
+ * @param ctx    The HMAC context
+ * @param key    The authentication key
+ * @param keylen The length of the key, in bytes
+ */
+void av_hmac_init(AVHMAC *ctx, const uint8_t *key, unsigned int keylen);
+
+/**
+ * Hash data with the HMAC.
+ * @param ctx  The HMAC context
+ * @param data The data to hash
+ * @param len  The length of the data, in bytes
+ */
+void av_hmac_update(AVHMAC *ctx, const uint8_t *data, unsigned int len);
+
+/**
+ * Finish hashing and output the HMAC digest.
+ * @param ctx    The HMAC context
+ * @param out    The output buffer to write the digest into
+ * @param outlen The length of the out buffer, in bytes
+ * @return       The number of bytes written to out, or a negative error code.
+ */
+int av_hmac_final(AVHMAC *ctx, uint8_t *out, unsigned int outlen);
+
+/**
+ * Hash an array of data with a key.
+ * @param ctx    The HMAC context
+ * @param data   The data to hash
+ * @param len    The length of the data, in bytes
+ * @param key    The authentication key
+ * @param keylen The length of the key, in bytes
+ * @param out    The output buffer to write the digest into
+ * @param outlen The length of the out buffer, in bytes
+ * @return       The number of bytes written to out, or a negative error code.
+ */
+int av_hmac_calc(AVHMAC *ctx, const uint8_t *data, unsigned int len,
+                 const uint8_t *key, unsigned int keylen,
+                 uint8_t *out, unsigned int outlen);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_HMAC_H */

ffmpeg/include/libavutil/hwcontext.h

@@ -0,0 +1,598 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_H
+#define AVUTIL_HWCONTEXT_H
+
+#include "buffer.h"
+#include "frame.h"
+#include "log.h"
+#include "pixfmt.h"
+
+enum AVHWDeviceType {
+    AV_HWDEVICE_TYPE_NONE,
+    AV_HWDEVICE_TYPE_VDPAU,
+    AV_HWDEVICE_TYPE_CUDA,
+    AV_HWDEVICE_TYPE_VAAPI,
+    AV_HWDEVICE_TYPE_DXVA2,
+    AV_HWDEVICE_TYPE_QSV,
+    AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
+    AV_HWDEVICE_TYPE_D3D11VA,
+    AV_HWDEVICE_TYPE_DRM,
+    AV_HWDEVICE_TYPE_OPENCL,
+    AV_HWDEVICE_TYPE_MEDIACODEC,
+    AV_HWDEVICE_TYPE_VULKAN,
+    AV_HWDEVICE_TYPE_D3D12VA,
+};
+
+/**
+ * This struct aggregates all the (hardware/vendor-specific) "high-level" state,
+ * i.e. state that is not tied to a concrete processing configuration.
+ * E.g., in an API that supports hardware-accelerated encoding and decoding,
+ * this struct will (if possible) wrap the state that is common to both encoding
+ * and decoding and from which specific instances of encoders or decoders can be
+ * derived.
+ *
+ * This struct is reference-counted with the AVBuffer mechanism. The
+ * av_hwdevice_ctx_alloc() constructor yields a reference, whose data field
+ * points to the actual AVHWDeviceContext. Further objects derived from
+ * AVHWDeviceContext (such as AVHWFramesContext, describing a frame pool with
+ * specific properties) will hold an internal reference to it. After all the
+ * references are released, the AVHWDeviceContext itself will be freed,
+ * optionally invoking a user-specified callback for uninitializing the hardware
+ * state.
+ */
+typedef struct AVHWDeviceContext {
+    /**
+     * A class for logging. Set by av_hwdevice_ctx_alloc().
+     */
+    const AVClass *av_class;
+
+    /**
+     * This field identifies the underlying API used for hardware access.
+     *
+     * This field is set when this struct is allocated and never changed
+     * afterwards.
+     */
+    enum AVHWDeviceType type;
+
+    /**
+     * The format-specific data, allocated and freed by libavutil along with
+     * this context.
+     *
+     * Should be cast by the user to the format-specific context defined in the
+     * corresponding header (hwcontext_*.h) and filled as described in the
+     * documentation before calling av_hwdevice_ctx_init().
+     *
+     * After calling av_hwdevice_ctx_init() this struct should not be modified
+     * by the caller.
+     */
+    void *hwctx;
+
+    /**
+     * This field may be set by the caller before calling av_hwdevice_ctx_init().
+     *
+     * If non-NULL, this callback will be called when the last reference to
+     * this context is unreferenced, immediately before it is freed.
+     *
+     * @note when other objects (e.g an AVHWFramesContext) are derived from this
+     *       struct, this callback will be invoked after all such child objects
+     *       are fully uninitialized and their respective destructors invoked.
+     */
+    void (*free)(struct AVHWDeviceContext *ctx);
+
+    /**
+     * Arbitrary user data, to be used e.g. by the free() callback.
+     */
+    void *user_opaque;
+} AVHWDeviceContext;
+
+/**
+ * This struct describes a set or pool of "hardware" frames (i.e. those with
+ * data not located in normal system memory). All the frames in the pool are
+ * assumed to be allocated in the same way and interchangeable.
+ *
+ * This struct is reference-counted with the AVBuffer mechanism and tied to a
+ * given AVHWDeviceContext instance. The av_hwframe_ctx_alloc() constructor
+ * yields a reference, whose data field points to the actual AVHWFramesContext
+ * struct.
+ */
+typedef struct AVHWFramesContext {
+    /**
+     * A class for logging.
+     */
+    const AVClass *av_class;
+
+    /**
+     * A reference to the parent AVHWDeviceContext. This reference is owned and
+     * managed by the enclosing AVHWFramesContext, but the caller may derive
+     * additional references from it.
+     */
+    AVBufferRef *device_ref;
+
+    /**
+     * The parent AVHWDeviceContext. This is simply a pointer to
+     * device_ref->data provided for convenience.
+     *
+     * Set by libavutil in av_hwframe_ctx_init().
+     */
+    AVHWDeviceContext *device_ctx;
+
+    /**
+     * The format-specific data, allocated and freed automatically along with
+     * this context.
+     *
+     * The user shall ignore this field if the corresponding format-specific
+     * header (hwcontext_*.h) does not define a context to be used as
+     * AVHWFramesContext.hwctx.
+     *
+     * Otherwise, it should be cast by the user to said context and filled
+     * as described in the documentation before calling av_hwframe_ctx_init().
+     *
+     * After any frames using this context are created, the contents of this
+     * struct should not be modified by the caller.
+     */
+    void *hwctx;
+
+    /**
+     * This field may be set by the caller before calling av_hwframe_ctx_init().
+     *
+     * If non-NULL, this callback will be called when the last reference to
+     * this context is unreferenced, immediately before it is freed.
+     */
+    void (*free)(struct AVHWFramesContext *ctx);
+
+    /**
+     * Arbitrary user data, to be used e.g. by the free() callback.
+     */
+    void *user_opaque;
+
+    /**
+     * A pool from which the frames are allocated by av_hwframe_get_buffer().
+     * This field may be set by the caller before calling av_hwframe_ctx_init().
+     * The buffers returned by calling av_buffer_pool_get() on this pool must
+     * have the properties described in the documentation in the corresponding hw
+     * type's header (hwcontext_*.h). The pool will be freed strictly before
+     * this struct's free() callback is invoked.
+     *
+     * This field may be NULL, then libavutil will attempt to allocate a pool
+     * internally. Note that certain device types enforce pools allocated at
+     * fixed size (frame count), which cannot be extended dynamically. In such a
+     * case, initial_pool_size must be set appropriately.
+     */
+    AVBufferPool *pool;
+
+    /**
+     * Initial size of the frame pool. If a device type does not support
+     * dynamically resizing the pool, then this is also the maximum pool size.
+     *
+     * May be set by the caller before calling av_hwframe_ctx_init(). Must be
+     * set if pool is NULL and the device type does not support dynamic pools.
+     */
+    int initial_pool_size;
+
+    /**
+     * The pixel format identifying the underlying HW surface type.
+     *
+     * Must be a hwaccel format, i.e. the corresponding descriptor must have the
+     * AV_PIX_FMT_FLAG_HWACCEL flag set.
+     *
+     * Must be set by the user before calling av_hwframe_ctx_init().
+     */
+    enum AVPixelFormat format;
+
+    /**
+     * The pixel format identifying the actual data layout of the hardware
+     * frames.
+     *
+     * Must be set by the caller before calling av_hwframe_ctx_init().
+     *
+     * @note when the underlying API does not provide the exact data layout, but
+     * only the colorspace/bit depth, this field should be set to the fully
+     * planar version of that format (e.g. for 8-bit 420 YUV it should be
+     * AV_PIX_FMT_YUV420P, not AV_PIX_FMT_NV12 or anything else).
+     */
+    enum AVPixelFormat sw_format;
+
+    /**
+     * The allocated dimensions of the frames in this pool.
+     *
+     * Must be set by the user before calling av_hwframe_ctx_init().
+     */
+    int width, height;
+} AVHWFramesContext;
+
+/**
+ * Look up an AVHWDeviceType by name.
+ *
+ * @param name String name of the device type (case-insensitive).
+ * @return The type from enum AVHWDeviceType, or AV_HWDEVICE_TYPE_NONE if
+ *         not found.
+ */
+enum AVHWDeviceType av_hwdevice_find_type_by_name(const char *name);
+
+/** Get the string name of an AVHWDeviceType.
+ *
+ * @param type Type from enum AVHWDeviceType.
+ * @return Pointer to a static string containing the name, or NULL if the type
+ *         is not valid.
+ */
+const char *av_hwdevice_get_type_name(enum AVHWDeviceType type);
+
+/**
+ * Iterate over supported device types.
+ *
+ * @param prev AV_HWDEVICE_TYPE_NONE initially, then the previous type
+ *             returned by this function in subsequent iterations.
+ * @return The next usable device type from enum AVHWDeviceType, or
+ *         AV_HWDEVICE_TYPE_NONE if there are no more.
+ */
+enum AVHWDeviceType av_hwdevice_iterate_types(enum AVHWDeviceType prev);
+
+/**
+ * Allocate an AVHWDeviceContext for a given hardware type.
+ *
+ * @param type the type of the hardware device to allocate.
+ * @return a reference to the newly created AVHWDeviceContext on success or NULL
+ *         on failure.
+ */
+AVBufferRef *av_hwdevice_ctx_alloc(enum AVHWDeviceType type);
+
+/**
+ * Finalize the device context before use. This function must be called after
+ * the context is filled with all the required information and before it is
+ * used in any way.
+ *
+ * @param ref a reference to the AVHWDeviceContext
+ * @return 0 on success, a negative AVERROR code on failure
+ */
+int av_hwdevice_ctx_init(AVBufferRef *ref);
+
+/**
+ * Open a device of the specified type and create an AVHWDeviceContext for it.
+ *
+ * This is a convenience function intended to cover the simple cases. Callers
+ * who need to fine-tune device creation/management should open the device
+ * manually and then wrap it in an AVHWDeviceContext using
+ * av_hwdevice_ctx_alloc()/av_hwdevice_ctx_init().
+ *
+ * The returned context is already initialized and ready for use, the caller
+ * should not call av_hwdevice_ctx_init() on it. The user_opaque/free fields of
+ * the created AVHWDeviceContext are set by this function and should not be
+ * touched by the caller.
+ *
+ * @param device_ctx On success, a reference to the newly-created device context
+ *                   will be written here. The reference is owned by the caller
+ *                   and must be released with av_buffer_unref() when no longer
+ *                   needed. On failure, NULL will be written to this pointer.
+ * @param type The type of the device to create.
+ * @param device A type-specific string identifying the device to open.
+ * @param opts A dictionary of additional (type-specific) options to use in
+ *             opening the device. The dictionary remains owned by the caller.
+ * @param flags currently unused
+ *
+ * @return 0 on success, a negative AVERROR code on failure.
+ */
+int av_hwdevice_ctx_create(AVBufferRef **device_ctx, enum AVHWDeviceType type,
+                           const char *device, AVDictionary *opts, int flags);
+
+/**
+ * Create a new device of the specified type from an existing device.
+ *
+ * If the source device is a device of the target type or was originally
+ * derived from such a device (possibly through one or more intermediate
+ * devices of other types), then this will return a reference to the
+ * existing device of the same type as is requested.
+ *
+ * Otherwise, it will attempt to derive a new device from the given source
+ * device.  If direct derivation to the new type is not implemented, it will
+ * attempt the same derivation from each ancestor of the source device in
+ * turn looking for an implemented derivation method.
+ *
+ * @param dst_ctx On success, a reference to the newly-created
+ *                AVHWDeviceContext.
+ * @param type    The type of the new device to create.
+ * @param src_ctx A reference to an existing AVHWDeviceContext which will be
+ *                used to create the new device.
+ * @param flags   Currently unused; should be set to zero.
+ * @return        Zero on success, a negative AVERROR code on failure.
+ */
+int av_hwdevice_ctx_create_derived(AVBufferRef **dst_ctx,
+                                   enum AVHWDeviceType type,
+                                   AVBufferRef *src_ctx, int flags);
+
+/**
+ * Create a new device of the specified type from an existing device.
+ *
+ * This function performs the same action as av_hwdevice_ctx_create_derived,
+ * however, it is able to set options for the new device to be derived.
+ *
+ * @param dst_ctx On success, a reference to the newly-created
+ *                AVHWDeviceContext.
+ * @param type    The type of the new device to create.
+ * @param src_ctx A reference to an existing AVHWDeviceContext which will be
+ *                used to create the new device.
+ * @param options Options for the new device to create, same format as in
+ *                av_hwdevice_ctx_create.
+ * @param flags   Currently unused; should be set to zero.
+ * @return        Zero on success, a negative AVERROR code on failure.
+ */
+int av_hwdevice_ctx_create_derived_opts(AVBufferRef **dst_ctx,
+                                        enum AVHWDeviceType type,
+                                        AVBufferRef *src_ctx,
+                                        AVDictionary *options, int flags);
+
+/**
+ * Allocate an AVHWFramesContext tied to a given device context.
+ *
+ * @param device_ctx a reference to a AVHWDeviceContext. This function will make
+ *                   a new reference for internal use, the one passed to the
+ *                   function remains owned by the caller.
+ * @return a reference to the newly created AVHWFramesContext on success or NULL
+ *         on failure.
+ */
+AVBufferRef *av_hwframe_ctx_alloc(AVBufferRef *device_ctx);
+
+/**
+ * Finalize the context before use. This function must be called after the
+ * context is filled with all the required information and before it is attached
+ * to any frames.
+ *
+ * @param ref a reference to the AVHWFramesContext
+ * @return 0 on success, a negative AVERROR code on failure
+ */
+int av_hwframe_ctx_init(AVBufferRef *ref);
+
+/**
+ * Allocate a new frame attached to the given AVHWFramesContext.
+ *
+ * @param hwframe_ctx a reference to an AVHWFramesContext
+ * @param frame an empty (freshly allocated or unreffed) frame to be filled with
+ *              newly allocated buffers.
+ * @param flags currently unused, should be set to zero
+ * @return 0 on success, a negative AVERROR code on failure
+ */
+int av_hwframe_get_buffer(AVBufferRef *hwframe_ctx, AVFrame *frame, int flags);
+
+/**
+ * Copy data to or from a hw surface. At least one of dst/src must have an
+ * AVHWFramesContext attached.
+ *
+ * If src has an AVHWFramesContext attached, then the format of dst (if set)
+ * must use one of the formats returned by av_hwframe_transfer_get_formats(src,
+ * AV_HWFRAME_TRANSFER_DIRECTION_FROM).
+ * If dst has an AVHWFramesContext attached, then the format of src must use one
+ * of the formats returned by av_hwframe_transfer_get_formats(dst,
+ * AV_HWFRAME_TRANSFER_DIRECTION_TO)
+ *
+ * dst may be "clean" (i.e. with data/buf pointers unset), in which case the
+ * data buffers will be allocated by this function using av_frame_get_buffer().
+ * If dst->format is set, then this format will be used, otherwise (when
+ * dst->format is AV_PIX_FMT_NONE) the first acceptable format will be chosen.
+ *
+ * The two frames must have matching allocated dimensions (i.e. equal to
+ * AVHWFramesContext.width/height), since not all device types support
+ * transferring a sub-rectangle of the whole surface. The display dimensions
+ * (i.e. AVFrame.width/height) may be smaller than the allocated dimensions, but
+ * also have to be equal for both frames. When the display dimensions are
+ * smaller than the allocated dimensions, the content of the padding in the
+ * destination frame is unspecified.
+ *
+ * @param dst the destination frame. dst is not touched on failure.
+ * @param src the source frame.
+ * @param flags currently unused, should be set to zero
+ * @return 0 on success, a negative AVERROR error code on failure.
+ */
+int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags);
+
+enum AVHWFrameTransferDirection {
+    /**
+     * Transfer the data from the queried hw frame.
+     */
+    AV_HWFRAME_TRANSFER_DIRECTION_FROM,
+
+    /**
+     * Transfer the data to the queried hw frame.
+     */
+    AV_HWFRAME_TRANSFER_DIRECTION_TO,
+};
+
+/**
+ * Get a list of possible source or target formats usable in
+ * av_hwframe_transfer_data().
+ *
+ * @param hwframe_ctx the frame context to obtain the information for
+ * @param dir the direction of the transfer
+ * @param formats the pointer to the output format list will be written here.
+ *                The list is terminated with AV_PIX_FMT_NONE and must be freed
+ *                by the caller when no longer needed using av_free().
+ *                If this function returns successfully, the format list will
+ *                have at least one item (not counting the terminator).
+ *                On failure, the contents of this pointer are unspecified.
+ * @param flags currently unused, should be set to zero
+ * @return 0 on success, a negative AVERROR code on failure.
+ */
+int av_hwframe_transfer_get_formats(AVBufferRef *hwframe_ctx,
+                                    enum AVHWFrameTransferDirection dir,
+                                    enum AVPixelFormat **formats, int flags);
+
+
+/**
+ * This struct describes the constraints on hardware frames attached to
+ * a given device with a hardware-specific configuration.  This is returned
+ * by av_hwdevice_get_hwframe_constraints() and must be freed by
+ * av_hwframe_constraints_free() after use.
+ */
+typedef struct AVHWFramesConstraints {
+    /**
+     * A list of possible values for format in the hw_frames_ctx,
+     * terminated by AV_PIX_FMT_NONE.  This member will always be filled.
+     */
+    enum AVPixelFormat *valid_hw_formats;
+
+    /**
+     * A list of possible values for sw_format in the hw_frames_ctx,
+     * terminated by AV_PIX_FMT_NONE.  Can be NULL if this information is
+     * not known.
+     */
+    enum AVPixelFormat *valid_sw_formats;
+
+    /**
+     * The minimum size of frames in this hw_frames_ctx.
+     * (Zero if not known.)
+     */
+    int min_width;
+    int min_height;
+
+    /**
+     * The maximum size of frames in this hw_frames_ctx.
+     * (INT_MAX if not known / no limit.)
+     */
+    int max_width;
+    int max_height;
+} AVHWFramesConstraints;
+
+/**
+ * Allocate a HW-specific configuration structure for a given HW device.
+ * After use, the user must free all members as required by the specific
+ * hardware structure being used, then free the structure itself with
+ * av_free().
+ *
+ * @param device_ctx a reference to the associated AVHWDeviceContext.
+ * @return The newly created HW-specific configuration structure on
+ *         success or NULL on failure.
+ */
+void *av_hwdevice_hwconfig_alloc(AVBufferRef *device_ctx);
+
+/**
+ * Get the constraints on HW frames given a device and the HW-specific
+ * configuration to be used with that device.  If no HW-specific
+ * configuration is provided, returns the maximum possible capabilities
+ * of the device.
+ *
+ * @param ref a reference to the associated AVHWDeviceContext.
+ * @param hwconfig a filled HW-specific configuration structure, or NULL
+ *        to return the maximum possible capabilities of the device.
+ * @return AVHWFramesConstraints structure describing the constraints
+ *         on the device, or NULL if not available.
+ */
+AVHWFramesConstraints *av_hwdevice_get_hwframe_constraints(AVBufferRef *ref,
+                                                           const void *hwconfig);
+
+/**
+ * Free an AVHWFrameConstraints structure.
+ *
+ * @param constraints The (filled or unfilled) AVHWFrameConstraints structure.
+ */
+void av_hwframe_constraints_free(AVHWFramesConstraints **constraints);
+
+
+/**
+ * Flags to apply to frame mappings.
+ */
+enum {
+    /**
+     * The mapping must be readable.
+     */
+    AV_HWFRAME_MAP_READ      = 1 << 0,
+    /**
+     * The mapping must be writeable.
+     */
+    AV_HWFRAME_MAP_WRITE     = 1 << 1,
+    /**
+     * The mapped frame will be overwritten completely in subsequent
+     * operations, so the current frame data need not be loaded.  Any values
+     * which are not overwritten are unspecified.
+     */
+    AV_HWFRAME_MAP_OVERWRITE = 1 << 2,
+    /**
+     * The mapping must be direct.  That is, there must not be any copying in
+     * the map or unmap steps.  Note that performance of direct mappings may
+     * be much lower than normal memory.
+     */
+    AV_HWFRAME_MAP_DIRECT    = 1 << 3,
+};
+
+/**
+ * Map a hardware frame.
+ *
+ * This has a number of different possible effects, depending on the format
+ * and origin of the src and dst frames.  On input, src should be a usable
+ * frame with valid buffers and dst should be blank (typically as just created
+ * by av_frame_alloc()).  src should have an associated hwframe context, and
+ * dst may optionally have a format and associated hwframe context.
+ *
+ * If src was created by mapping a frame from the hwframe context of dst,
+ * then this function undoes the mapping - dst is replaced by a reference to
+ * the frame that src was originally mapped from.
+ *
+ * If both src and dst have an associated hwframe context, then this function
+ * attempts to map the src frame from its hardware context to that of dst and
+ * then fill dst with appropriate data to be usable there.  This will only be
+ * possible if the hwframe contexts and associated devices are compatible -
+ * given compatible devices, av_hwframe_ctx_create_derived() can be used to
+ * create a hwframe context for dst in which mapping should be possible.
+ *
+ * If src has a hwframe context but dst does not, then the src frame is
+ * mapped to normal memory and should thereafter be usable as a normal frame.
+ * If the format is set on dst, then the mapping will attempt to create dst
+ * with that format and fail if it is not possible.  If format is unset (is
+ * AV_PIX_FMT_NONE) then dst will be mapped with whatever the most appropriate
+ * format to use is (probably the sw_format of the src hwframe context).
+ *
+ * A return value of AVERROR(ENOSYS) indicates that the mapping is not
+ * possible with the given arguments and hwframe setup, while other return
+ * values indicate that it failed somehow.
+ *
+ * On failure, the destination frame will be left blank, except for the
+ * hw_frames_ctx/format fields thay may have been set by the caller - those will
+ * be preserved as they were.
+ *
+ * @param dst Destination frame, to contain the mapping.
+ * @param src Source frame, to be mapped.
+ * @param flags Some combination of AV_HWFRAME_MAP_* flags.
+ * @return Zero on success, negative AVERROR code on failure.
+ */
+int av_hwframe_map(AVFrame *dst, const AVFrame *src, int flags);
+
+
+/**
+ * Create and initialise an AVHWFramesContext as a mapping of another existing
+ * AVHWFramesContext on a different device.
+ *
+ * av_hwframe_ctx_init() should not be called after this.
+ *
+ * @param derived_frame_ctx  On success, a reference to the newly created
+ *                           AVHWFramesContext.
+ * @param format             The AVPixelFormat for the derived context.
+ * @param derived_device_ctx A reference to the device to create the new
+ *                           AVHWFramesContext on.
+ * @param source_frame_ctx   A reference to an existing AVHWFramesContext
+ *                           which will be mapped to the derived context.
+ * @param flags  Some combination of AV_HWFRAME_MAP_* flags, defining the
+ *               mapping parameters to apply to frames which are allocated
+ *               in the derived device.
+ * @return       Zero on success, negative AVERROR code on failure.
+ */
+int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx,
+                                  enum AVPixelFormat format,
+                                  AVBufferRef *derived_device_ctx,
+                                  AVBufferRef *source_frame_ctx,
+                                  int flags);
+
+#endif /* AVUTIL_HWCONTEXT_H */

ffmpeg/include/libavutil/hwcontext_cuda.h

@@ -0,0 +1,74 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#ifndef AVUTIL_HWCONTEXT_CUDA_H
+#define AVUTIL_HWCONTEXT_CUDA_H
+
+#ifndef CUDA_VERSION
+#include <cuda.h>
+#endif
+
+#include "pixfmt.h"
+
+/**
+ * @file
+ * An API-specific header for AV_HWDEVICE_TYPE_CUDA.
+ *
+ * This API supports dynamic frame pools. AVHWFramesContext.pool must return
+ * AVBufferRefs whose data pointer is a CUdeviceptr.
+ */
+
+typedef struct AVCUDADeviceContextInternal AVCUDADeviceContextInternal;
+
+/**
+ * This struct is allocated as AVHWDeviceContext.hwctx
+ */
+typedef struct AVCUDADeviceContext {
+    CUcontext cuda_ctx;
+    CUstream stream;
+    AVCUDADeviceContextInternal *internal;
+} AVCUDADeviceContext;
+
+/**
+ * AVHWFramesContext.hwctx is currently not used
+ */
+
+/**
+ * @defgroup hwcontext_cuda Device context creation flags
+ *
+ * Flags for av_hwdevice_ctx_create.
+ *
+ * @{
+ */
+
+/**
+ * Use primary device context instead of creating a new one.
+ */
+#define AV_CUDA_USE_PRIMARY_CONTEXT (1 << 0)
+
+/**
+ * Use current device context instead of creating a new one.
+ */
+#define AV_CUDA_USE_CURRENT_CONTEXT (1 << 1)
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_HWCONTEXT_CUDA_H */

ffmpeg/include/libavutil/hwcontext_d3d11va.h

@@ -0,0 +1,178 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_D3D11VA_H
+#define AVUTIL_HWCONTEXT_D3D11VA_H
+
+/**
+ * @file
+ * An API-specific header for AV_HWDEVICE_TYPE_D3D11VA.
+ *
+ * The default pool implementation will be fixed-size if initial_pool_size is
+ * set (and allocate elements from an array texture). Otherwise it will allocate
+ * individual textures. Be aware that decoding requires a single array texture.
+ *
+ * Using sw_format==AV_PIX_FMT_YUV420P has special semantics, and maps to
+ * DXGI_FORMAT_420_OPAQUE. av_hwframe_transfer_data() is not supported for
+ * this format. Refer to MSDN for details.
+ *
+ * av_hwdevice_ctx_create() for this device type supports a key named "debug"
+ * for the AVDictionary entry. If this is set to any value, the device creation
+ * code will try to load various supported D3D debugging layers.
+ */
+
+#include <d3d11.h>
+#include <stdint.h>
+
+/**
+ * This struct is allocated as AVHWDeviceContext.hwctx
+ */
+typedef struct AVD3D11VADeviceContext {
+    /**
+     * Device used for texture creation and access. This can also be used to
+     * set the libavcodec decoding device.
+     *
+     * Must be set by the user. This is the only mandatory field - the other
+     * device context fields are set from this and are available for convenience.
+     *
+     * Deallocating the AVHWDeviceContext will always release this interface,
+     * and it does not matter whether it was user-allocated.
+     */
+    ID3D11Device        *device;
+
+    /**
+     * If unset, this will be set from the device field on init.
+     *
+     * Deallocating the AVHWDeviceContext will always release this interface,
+     * and it does not matter whether it was user-allocated.
+     */
+    ID3D11DeviceContext *device_context;
+
+    /**
+     * If unset, this will be set from the device field on init.
+     *
+     * Deallocating the AVHWDeviceContext will always release this interface,
+     * and it does not matter whether it was user-allocated.
+     */
+    ID3D11VideoDevice   *video_device;
+
+    /**
+     * If unset, this will be set from the device_context field on init.
+     *
+     * Deallocating the AVHWDeviceContext will always release this interface,
+     * and it does not matter whether it was user-allocated.
+     */
+    ID3D11VideoContext  *video_context;
+
+    /**
+     * Callbacks for locking. They protect accesses to device_context and
+     * video_context calls. They also protect access to the internal staging
+     * texture (for av_hwframe_transfer_data() calls). They do NOT protect
+     * access to hwcontext or decoder state in general.
+     *
+     * If unset on init, the hwcontext implementation will set them to use an
+     * internal mutex.
+     *
+     * The underlying lock must be recursive. lock_ctx is for free use by the
+     * locking implementation.
+     */
+    void (*lock)(void *lock_ctx);
+    void (*unlock)(void *lock_ctx);
+    void *lock_ctx;
+} AVD3D11VADeviceContext;
+
+/**
+ * D3D11 frame descriptor for pool allocation.
+ *
+ * In user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
+ * with the data pointer pointing at an object of this type describing the
+ * planes of the frame.
+ *
+ * This has no use outside of custom allocation, and AVFrame AVBufferRef do not
+ * necessarily point to an instance of this struct.
+ */
+typedef struct AVD3D11FrameDescriptor {
+    /**
+     * The texture in which the frame is located. The reference count is
+     * managed by the AVBufferRef, and destroying the reference will release
+     * the interface.
+     *
+     * Normally stored in AVFrame.data[0].
+     */
+    ID3D11Texture2D *texture;
+
+    /**
+     * The index into the array texture element representing the frame, or 0
+     * if the texture is not an array texture.
+     *
+     * Normally stored in AVFrame.data[1] (cast from intptr_t).
+     */
+    intptr_t index;
+} AVD3D11FrameDescriptor;
+
+/**
+ * This struct is allocated as AVHWFramesContext.hwctx
+ */
+typedef struct AVD3D11VAFramesContext {
+    /**
+     * The canonical texture used for pool allocation. If this is set to NULL
+     * on init, the hwframes implementation will allocate and set an array
+     * texture if initial_pool_size > 0.
+     *
+     * The only situation when the API user should set this is:
+     * - the user wants to do manual pool allocation (setting
+     *   AVHWFramesContext.pool), instead of letting AVHWFramesContext
+     *   allocate the pool
+     * - of an array texture
+     * - and wants it to use it for decoding
+     * - this has to be done before calling av_hwframe_ctx_init()
+     *
+     * Deallocating the AVHWFramesContext will always release this interface,
+     * and it does not matter whether it was user-allocated.
+     *
+     * This is in particular used by the libavcodec D3D11VA hwaccel, which
+     * requires a single array texture. It will create ID3D11VideoDecoderOutputView
+     * objects for each array texture element on decoder initialization.
+     */
+    ID3D11Texture2D *texture;
+
+    /**
+     * D3D11_TEXTURE2D_DESC.BindFlags used for texture creation. The user must
+     * at least set D3D11_BIND_DECODER if the frames context is to be used for
+     * video decoding.
+     * This field is ignored/invalid if a user-allocated texture is provided.
+     */
+    UINT BindFlags;
+
+    /**
+     * D3D11_TEXTURE2D_DESC.MiscFlags used for texture creation.
+     * This field is ignored/invalid if a user-allocated texture is provided.
+     */
+    UINT MiscFlags;
+
+    /**
+     * In case if texture structure member above is not NULL contains the same texture
+     * pointer for all elements and different indexes into the array texture.
+     * In case if texture structure member above is NULL, all elements contains
+     * pointers to separate non-array textures and 0 indexes.
+     * This field is ignored/invalid if a user-allocated texture is provided.
+    */
+    AVD3D11FrameDescriptor *texture_infos;
+} AVD3D11VAFramesContext;
+
+#endif /* AVUTIL_HWCONTEXT_D3D11VA_H */

ffmpeg/include/libavutil/hwcontext_d3d12va.h

@@ -0,0 +1,142 @@
+/*
+ * Direct3D 12 HW acceleration.
+ *
+ * copyright (c) 2022-2023 Wu Jianhua <toqsxw@outlook.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_D3D12VA_H
+#define AVUTIL_HWCONTEXT_D3D12VA_H
+
+/**
+ * @file
+ * An API-specific header for AV_HWDEVICE_TYPE_D3D12VA.
+ *
+ * AVHWFramesContext.pool must contain AVBufferRefs whose
+ * data pointer points to an AVD3D12VAFrame struct.
+ */
+#include <stdint.h>
+#include <initguid.h>
+#include <d3d12.h>
+#include <d3d12sdklayers.h>
+#include <d3d12video.h>
+
+/**
+ * @brief This struct is allocated as AVHWDeviceContext.hwctx
+ *
+ */
+typedef struct AVD3D12VADeviceContext {
+    /**
+     * Device used for objects creation and access. This can also be
+     * used to set the libavcodec decoding device.
+     *
+     * Can be set by the user. This is the only mandatory field - the other
+     * device context fields are set from this and are available for convenience.
+     *
+     * Deallocating the AVHWDeviceContext will always release this interface,
+     * and it does not matter whether it was user-allocated.
+     */
+    ID3D12Device *device;
+
+    /**
+     * If unset, this will be set from the device field on init.
+     *
+     * Deallocating the AVHWDeviceContext will always release this interface,
+     * and it does not matter whether it was user-allocated.
+     */
+    ID3D12VideoDevice *video_device;
+
+    /**
+     * Callbacks for locking. They protect access to the internal staging
+     * texture (for av_hwframe_transfer_data() calls). They do NOT protect
+     * access to hwcontext or decoder state in general.
+     *
+     * If unset on init, the hwcontext implementation will set them to use an
+     * internal mutex.
+     *
+     * The underlying lock must be recursive. lock_ctx is for free use by the
+     * locking implementation.
+     */
+    void (*lock)(void *lock_ctx);
+    void (*unlock)(void *lock_ctx);
+    void *lock_ctx;
+} AVD3D12VADeviceContext;
+
+/**
+ * @brief This struct is used to sync d3d12 execution
+ *
+ */
+typedef struct AVD3D12VASyncContext {
+    /**
+     * D3D12 fence object
+     */
+    ID3D12Fence *fence;
+
+    /**
+     * A handle to the event object that's raised when the fence
+     * reaches a certain value.
+     */
+    HANDLE event;
+
+    /**
+     * The fence value used for sync
+     */
+    uint64_t fence_value;
+} AVD3D12VASyncContext;
+
+/**
+ * @brief D3D12VA frame descriptor for pool allocation.
+ *
+ */
+typedef struct AVD3D12VAFrame {
+    /**
+     * The texture in which the frame is located. The reference count is
+     * managed by the AVBufferRef, and destroying the reference will release
+     * the interface.
+     */
+    ID3D12Resource *texture;
+
+    /**
+     * The sync context for the texture
+     *
+     * @see: https://learn.microsoft.com/en-us/windows/win32/medfound/direct3d-12-video-overview#directx-12-fences
+     */
+    AVD3D12VASyncContext sync_ctx;
+} AVD3D12VAFrame;
+
+/**
+ * @brief This struct is allocated as AVHWFramesContext.hwctx
+ *
+ */
+typedef struct AVD3D12VAFramesContext {
+    /**
+     * DXGI_FORMAT format. MUST be compatible with the pixel format.
+     * If unset, will be automatically set.
+     */
+    DXGI_FORMAT format;
+
+    /**
+     * Options for working with resources.
+     * If unset, this will be D3D12_RESOURCE_FLAG_NONE.
+     *
+     * @see https://learn.microsoft.com/en-us/windows/win32/api/d3d12/ne-d3d12-d3d12_resource_flags
+     */
+    D3D12_RESOURCE_FLAGS flags;
+} AVD3D12VAFramesContext;
+
+#endif /* AVUTIL_HWCONTEXT_D3D12VA_H */

ffmpeg/include/libavutil/hwcontext_drm.h

@@ -0,0 +1,169 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_DRM_H
+#define AVUTIL_HWCONTEXT_DRM_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/**
+ * @file
+ * API-specific header for AV_HWDEVICE_TYPE_DRM.
+ *
+ * Internal frame allocation is not currently supported - all frames
+ * must be allocated by the user.  Thus AVHWFramesContext is always
+ * NULL, though this may change if support for frame allocation is
+ * added in future.
+ */
+
+enum {
+    /**
+     * The maximum number of layers/planes in a DRM frame.
+     */
+    AV_DRM_MAX_PLANES = 4
+};
+
+/**
+ * DRM object descriptor.
+ *
+ * Describes a single DRM object, addressing it as a PRIME file
+ * descriptor.
+ */
+typedef struct AVDRMObjectDescriptor {
+    /**
+     * DRM PRIME fd for the object.
+     */
+    int fd;
+    /**
+     * Total size of the object.
+     *
+     * (This includes any parts not which do not contain image data.)
+     */
+    size_t size;
+    /**
+     * Format modifier applied to the object (DRM_FORMAT_MOD_*).
+     *
+     * If the format modifier is unknown then this should be set to
+     * DRM_FORMAT_MOD_INVALID.
+     */
+    uint64_t format_modifier;
+} AVDRMObjectDescriptor;
+
+/**
+ * DRM plane descriptor.
+ *
+ * Describes a single plane of a layer, which is contained within
+ * a single object.
+ */
+typedef struct AVDRMPlaneDescriptor {
+    /**
+     * Index of the object containing this plane in the objects
+     * array of the enclosing frame descriptor.
+     */
+    int object_index;
+    /**
+     * Offset within that object of this plane.
+     */
+    ptrdiff_t offset;
+    /**
+     * Pitch (linesize) of this plane.
+     */
+    ptrdiff_t pitch;
+} AVDRMPlaneDescriptor;
+
+/**
+ * DRM layer descriptor.
+ *
+ * Describes a single layer within a frame.  This has the structure
+ * defined by its format, and will contain one or more planes.
+ */
+typedef struct AVDRMLayerDescriptor {
+    /**
+     * Format of the layer (DRM_FORMAT_*).
+     */
+    uint32_t format;
+    /**
+     * Number of planes in the layer.
+     *
+     * This must match the number of planes required by format.
+     */
+    int nb_planes;
+    /**
+     * Array of planes in this layer.
+     */
+    AVDRMPlaneDescriptor planes[AV_DRM_MAX_PLANES];
+} AVDRMLayerDescriptor;
+
+/**
+ * DRM frame descriptor.
+ *
+ * This is used as the data pointer for AV_PIX_FMT_DRM_PRIME frames.
+ * It is also used by user-allocated frame pools - allocating in
+ * AVHWFramesContext.pool must return AVBufferRefs which contain
+ * an object of this type.
+ *
+ * The fields of this structure should be set such it can be
+ * imported directly by EGL using the EGL_EXT_image_dma_buf_import
+ * and EGL_EXT_image_dma_buf_import_modifiers extensions.
+ * (Note that the exact layout of a particular format may vary between
+ * platforms - we only specify that the same platform should be able
+ * to import it.)
+ *
+ * The total number of planes must not exceed AV_DRM_MAX_PLANES, and
+ * the order of the planes by increasing layer index followed by
+ * increasing plane index must be the same as the order which would
+ * be used for the data pointers in the equivalent software format.
+ */
+typedef struct AVDRMFrameDescriptor {
+    /**
+     * Number of DRM objects making up this frame.
+     */
+    int nb_objects;
+    /**
+     * Array of objects making up the frame.
+     */
+    AVDRMObjectDescriptor objects[AV_DRM_MAX_PLANES];
+    /**
+     * Number of layers in the frame.
+     */
+    int nb_layers;
+    /**
+     * Array of layers in the frame.
+     */
+    AVDRMLayerDescriptor layers[AV_DRM_MAX_PLANES];
+} AVDRMFrameDescriptor;
+
+/**
+ * DRM device.
+ *
+ * Allocated as AVHWDeviceContext.hwctx.
+ */
+typedef struct AVDRMDeviceContext {
+    /**
+     * File descriptor of DRM device.
+     *
+     * This is used as the device to create frames on, and may also be
+     * used in some derivation and mapping operations.
+     *
+     * If no device is required, set to -1.
+     */
+    int fd;
+} AVDRMDeviceContext;
+
+#endif /* AVUTIL_HWCONTEXT_DRM_H */

ffmpeg/include/libavutil/hwcontext_dxva2.h

@@ -0,0 +1,75 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#ifndef AVUTIL_HWCONTEXT_DXVA2_H
+#define AVUTIL_HWCONTEXT_DXVA2_H
+
+/**
+ * @file
+ * An API-specific header for AV_HWDEVICE_TYPE_DXVA2.
+ *
+ * Only fixed-size pools are supported.
+ *
+ * For user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
+ * with the data pointer set to a pointer to IDirect3DSurface9.
+ */
+
+#include <d3d9.h>
+#include <dxva2api.h>
+
+/**
+ * This struct is allocated as AVHWDeviceContext.hwctx
+ */
+typedef struct AVDXVA2DeviceContext {
+    IDirect3DDeviceManager9 *devmgr;
+} AVDXVA2DeviceContext;
+
+/**
+ * This struct is allocated as AVHWFramesContext.hwctx
+ */
+typedef struct AVDXVA2FramesContext {
+    /**
+     * The surface type (e.g. DXVA2_VideoProcessorRenderTarget or
+     * DXVA2_VideoDecoderRenderTarget). Must be set by the caller.
+     */
+    DWORD               surface_type;
+
+    /**
+     * The surface pool. When an external pool is not provided by the caller,
+     * this will be managed (allocated and filled on init, freed on uninit) by
+     * libavutil.
+     */
+    IDirect3DSurface9 **surfaces;
+    int              nb_surfaces;
+
+    /**
+     * Certain drivers require the decoder to be destroyed before the surfaces.
+     * To allow internally managed pools to work properly in such cases, this
+     * field is provided.
+     *
+     * If it is non-NULL, libavutil will call IDirectXVideoDecoder_Release() on
+     * it just before the internal surface pool is freed.
+     *
+     * This is for convenience only. Some code uses other methods to manage the
+     * decoder reference.
+     */
+    IDirectXVideoDecoder *decoder_to_release;
+} AVDXVA2FramesContext;
+
+#endif /* AVUTIL_HWCONTEXT_DXVA2_H */