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ffmpeg/include/libavutil/hwcontext_vulkan.h

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+/*
+ * 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_VULKAN_H
+#define AVUTIL_HWCONTEXT_VULKAN_H
+
+#if defined(_WIN32) && !defined(VK_USE_PLATFORM_WIN32_KHR)
+#define VK_USE_PLATFORM_WIN32_KHR
+#endif
+#include <vulkan/vulkan.h>
+
+#include "pixfmt.h"
+#include "frame.h"
+#include "hwcontext.h"
+
+typedef struct AVVkFrame AVVkFrame;
+
+typedef struct AVVulkanDeviceQueueFamily {
+    /* Queue family index */
+    int idx;
+    /* Number of queues in the queue family in use */
+    int num;
+    /* Queue family capabilities. Must be non-zero.
+     * Flags may be removed to indicate the queue family may not be used
+     * for a given purpose. */
+    VkQueueFlagBits flags;
+    /* Vulkan implementations are allowed to list multiple video queues
+     * which differ in what they can encode or decode. */
+    VkVideoCodecOperationFlagBitsKHR video_caps;
+} AVVulkanDeviceQueueFamily;
+
+/**
+ * @file
+ * API-specific header for AV_HWDEVICE_TYPE_VULKAN.
+ *
+ * For user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
+ * with the data pointer set to an AVVkFrame.
+ */
+
+/**
+ * Main Vulkan context, allocated as AVHWDeviceContext.hwctx.
+ * All of these can be set before init to change what the context uses
+ */
+typedef struct AVVulkanDeviceContext {
+    /**
+     * Custom memory allocator, else NULL
+     */
+    const VkAllocationCallbacks *alloc;
+
+    /**
+     * Pointer to a vkGetInstanceProcAddr loading function.
+     * If unset, will dynamically load and use libvulkan.
+     */
+    PFN_vkGetInstanceProcAddr get_proc_addr;
+
+    /**
+     * Vulkan instance. Must be at least version 1.3.
+     */
+    VkInstance inst;
+
+    /**
+     * Physical device
+     */
+    VkPhysicalDevice phys_dev;
+
+    /**
+     * Active device
+     */
+    VkDevice act_dev;
+
+    /**
+     * This structure should be set to the set of features that present and enabled
+     * during device creation. When a device is created by FFmpeg, it will default to
+     * enabling all that are present of the shaderImageGatherExtended,
+     * fragmentStoresAndAtomics, shaderInt64 and vertexPipelineStoresAndAtomics features.
+     */
+    VkPhysicalDeviceFeatures2 device_features;
+
+    /**
+     * Enabled instance extensions.
+     * If supplying your own device context, set this to an array of strings, with
+     * each entry containing the specified Vulkan extension string to enable.
+     * Duplicates are possible and accepted.
+     * If no extensions are enabled, set these fields to NULL, and 0 respectively.
+     */
+    const char * const *enabled_inst_extensions;
+    int nb_enabled_inst_extensions;
+
+    /**
+     * Enabled device extensions. By default, VK_KHR_external_memory_fd,
+     * VK_EXT_external_memory_dma_buf, VK_EXT_image_drm_format_modifier,
+     * VK_KHR_external_semaphore_fd and VK_EXT_external_memory_host are enabled if found.
+     * If supplying your own device context, these fields takes the same format as
+     * the above fields, with the same conditions that duplicates are possible
+     * and accepted, and that NULL and 0 respectively means no extensions are enabled.
+     */
+    const char * const *enabled_dev_extensions;
+    int nb_enabled_dev_extensions;
+
+#if FF_API_VULKAN_FIXED_QUEUES
+    /**
+     * Queue family index for graphics operations, and the number of queues
+     * enabled for it. If unavaiable, will be set to -1. Not required.
+     * av_hwdevice_create() will attempt to find a dedicated queue for each
+     * queue family, or pick the one with the least unrelated flags set.
+     * Queue indices here may overlap if a queue has to share capabilities.
+     */
+    attribute_deprecated
+    int queue_family_index;
+    attribute_deprecated
+    int nb_graphics_queues;
+
+    /**
+     * Queue family index for transfer operations and the number of queues
+     * enabled. Required.
+     */
+    attribute_deprecated
+    int queue_family_tx_index;
+    attribute_deprecated
+    int nb_tx_queues;
+
+    /**
+     * Queue family index for compute operations and the number of queues
+     * enabled. Required.
+     */
+    attribute_deprecated
+    int queue_family_comp_index;
+    attribute_deprecated
+    int nb_comp_queues;
+
+    /**
+     * Queue family index for video encode ops, and the amount of queues enabled.
+     * If the device doesn't support such, queue_family_encode_index will be -1.
+     * Not required.
+     */
+    attribute_deprecated
+    int queue_family_encode_index;
+    attribute_deprecated
+    int nb_encode_queues;
+
+    /**
+     * Queue family index for video decode ops, and the amount of queues enabled.
+     * If the device doesn't support such, queue_family_decode_index will be -1.
+     * Not required.
+     */
+    attribute_deprecated
+    int queue_family_decode_index;
+    attribute_deprecated
+    int nb_decode_queues;
+#endif
+
+    /**
+     * Locks a queue, preventing other threads from submitting any command
+     * buffers to this queue.
+     * If set to NULL, will be set to lavu-internal functions that utilize a
+     * mutex.
+     */
+    void (*lock_queue)(struct AVHWDeviceContext *ctx, uint32_t queue_family, uint32_t index);
+
+    /**
+     * Similar to lock_queue(), unlocks a queue. Must only be called after locking.
+     */
+    void (*unlock_queue)(struct AVHWDeviceContext *ctx, uint32_t queue_family, uint32_t index);
+
+    /**
+     * Queue families used. Must be preferentially ordered. List may contain
+     * duplicates.
+     *
+     * For compatibility reasons, all the enabled queue families listed above
+     * (queue_family_(tx/comp/encode/decode)_index) must also be included in
+     * this list until they're removed after deprecation.
+     */
+    AVVulkanDeviceQueueFamily qf[64];
+    int nb_qf;
+} AVVulkanDeviceContext;
+
+/**
+ * Defines the behaviour of frame allocation.
+ */
+typedef enum AVVkFrameFlags {
+    /* Unless this flag is set, autodetected flags will be OR'd based on the
+     * device and tiling during av_hwframe_ctx_init(). */
+    AV_VK_FRAME_FLAG_NONE              = (1ULL << 0),
+
+#if FF_API_VULKAN_CONTIGUOUS_MEMORY
+    /* DEPRECATED: does nothing. Replaced by multiplane images. */
+    AV_VK_FRAME_FLAG_CONTIGUOUS_MEMORY = (1ULL << 1),
+#endif
+
+    /* Disables multiplane images.
+     * This is required to export/import images from CUDA. */
+    AV_VK_FRAME_FLAG_DISABLE_MULTIPLANE = (1ULL << 2),
+} AVVkFrameFlags;
+
+/**
+ * Allocated as AVHWFramesContext.hwctx, used to set pool-specific options
+ */
+typedef struct AVVulkanFramesContext {
+    /**
+     * Controls the tiling of allocated frames.
+     * If left as VK_IMAGE_TILING_OPTIMAL (0), will use optimal tiling.
+     * Can be set to VK_IMAGE_TILING_LINEAR to force linear images,
+     * or VK_IMAGE_TILING_DRM_FORMAT_MODIFIER_EXT to force DMABUF-backed
+     * images.
+     * @note Imported frames from other APIs ignore this.
+     */
+    VkImageTiling tiling;
+
+    /**
+     * Defines extra usage of output frames. If non-zero, all flags MUST be
+     * supported by the VkFormat. Otherwise, will use supported flags amongst:
+     * - VK_IMAGE_USAGE_SAMPLED_BIT
+     * - VK_IMAGE_USAGE_STORAGE_BIT
+     * - VK_IMAGE_USAGE_TRANSFER_SRC_BIT
+     * - VK_IMAGE_USAGE_TRANSFER_DST_BIT
+     */
+    VkImageUsageFlagBits usage;
+
+    /**
+     * Extension data for image creation.
+     * If DRM tiling is used, a VkImageDrmFormatModifierListCreateInfoEXT structure
+     * can be added to specify the exact modifier to use.
+     *
+     * Additional structures may be added at av_hwframe_ctx_init() time,
+     * which will be freed automatically on uninit(), so users must only free
+     * any structures they've allocated themselves.
+     */
+    void *create_pnext;
+
+    /**
+     * Extension data for memory allocation. Must have as many entries as
+     * the number of planes of the sw_format.
+     * This will be chained to VkExportMemoryAllocateInfo, which is used
+     * to make all pool images exportable to other APIs if the necessary
+     * extensions are present in enabled_dev_extensions.
+     */
+    void *alloc_pnext[AV_NUM_DATA_POINTERS];
+
+    /**
+     * A combination of AVVkFrameFlags. Unless AV_VK_FRAME_FLAG_NONE is set,
+     * autodetected flags will be OR'd based on the device and tiling during
+     * av_hwframe_ctx_init().
+     */
+    AVVkFrameFlags flags;
+
+    /**
+     * Flags to set during image creation. If unset, defaults to
+     * VK_IMAGE_CREATE_ALIAS_BIT.
+     */
+    VkImageCreateFlags img_flags;
+
+    /**
+     * Vulkan format for each image. MUST be compatible with the pixel format.
+     * If unset, will be automatically set.
+     * There are at most two compatible formats for a frame - a multiplane
+     * format, and a single-plane multi-image format.
+     */
+    VkFormat format[AV_NUM_DATA_POINTERS];
+
+    /**
+     * Number of layers each image will have.
+     */
+    int nb_layers;
+
+    /**
+     * Locks a frame, preventing other threads from changing frame properties.
+     * Users SHOULD only ever lock just before command submission in order
+     * to get accurate frame properties, and unlock immediately after command
+     * submission without waiting for it to finish.
+     *
+     * If unset, will be set to lavu-internal functions that utilize a mutex.
+     */
+    void (*lock_frame)(struct AVHWFramesContext *fc, AVVkFrame *vkf);
+
+    /**
+     * Similar to lock_frame(), unlocks a frame. Must only be called after locking.
+     */
+    void (*unlock_frame)(struct AVHWFramesContext *fc, AVVkFrame *vkf);
+} AVVulkanFramesContext;
+
+/*
+ * Frame structure.
+ *
+ * @note the size of this structure is not part of the ABI, to allocate
+ * you must use @av_vk_frame_alloc().
+ */
+struct AVVkFrame {
+    /**
+     * Vulkan images to which the memory is bound to.
+     * May be one for multiplane formats, or multiple.
+     */
+    VkImage img[AV_NUM_DATA_POINTERS];
+
+    /**
+     * Tiling for the frame.
+     */
+    VkImageTiling tiling;
+
+    /**
+     * Memory backing the images. Either one, or as many as there are planes
+     * in the sw_format.
+     * In case of having multiple VkImages, but one memory, the offset field
+     * will indicate the bound offset for each image.
+     */
+    VkDeviceMemory mem[AV_NUM_DATA_POINTERS];
+    size_t size[AV_NUM_DATA_POINTERS];
+
+    /**
+     * OR'd flags for all memory allocated
+     */
+    VkMemoryPropertyFlagBits flags;
+
+    /**
+     * Updated after every barrier. One per VkImage.
+     */
+    VkAccessFlagBits access[AV_NUM_DATA_POINTERS];
+    VkImageLayout layout[AV_NUM_DATA_POINTERS];
+
+    /**
+     * Synchronization timeline semaphores, one for each VkImage.
+     * Must not be freed manually. Must be waited on at every submission using
+     * the value in sem_value, and must be signalled at every submission,
+     * using an incremented value.
+     */
+    VkSemaphore sem[AV_NUM_DATA_POINTERS];
+
+    /**
+     * Up to date semaphore value at which each image becomes accessible.
+     * One per VkImage.
+     * Clients must wait on this value when submitting a command queue,
+     * and increment it when signalling.
+     */
+    uint64_t sem_value[AV_NUM_DATA_POINTERS];
+
+    /**
+     * Internal data.
+     */
+    struct AVVkFrameInternal *internal;
+
+    /**
+     * Describes the binding offset of each image to the VkDeviceMemory.
+     * One per VkImage.
+     */
+    ptrdiff_t offset[AV_NUM_DATA_POINTERS];
+
+    /**
+     * Queue family of the images. Must be VK_QUEUE_FAMILY_IGNORED if
+     * the image was allocated with the CONCURRENT concurrency option.
+     * One per VkImage.
+     */
+    uint32_t queue_family[AV_NUM_DATA_POINTERS];
+};
+
+/**
+ * Allocates a single AVVkFrame and initializes everything as 0.
+ * @note Must be freed via av_free()
+ */
+AVVkFrame *av_vk_frame_alloc(void);
+
+/**
+ * Returns the optimal per-plane Vulkan format for a given sw_format,
+ * one for each plane.
+ * Returns NULL on unsupported formats.
+ */
+const VkFormat *av_vkfmt_from_pixfmt(enum AVPixelFormat p);
+
+#endif /* AVUTIL_HWCONTEXT_VULKAN_H */

ffmpeg/include/libavutil/iamf.h

@@ -0,0 +1,694 @@
+/*
+ * Immersive Audio Model and Formats helper functions and defines
+ *
+ * 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_IAMF_H
+#define AVUTIL_IAMF_H
+
+/**
+ * @file
+ * Immersive Audio Model and Formats API header
+ * @see <a href="https://aomediacodec.github.io/iamf/">Immersive Audio Model and Formats</a>
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include "attributes.h"
+#include "avassert.h"
+#include "channel_layout.h"
+#include "dict.h"
+#include "rational.h"
+
+/**
+ * @defgroup lavu_iamf Immersive Audio Model and Formats
+ * @ingroup lavu_audio
+ *
+ * Immersive Audio Model and Formats related functions and defines
+ *
+ * @defgroup lavu_iamf_params Parameter Definition
+ * @ingroup lavu_iamf
+ * @{
+ * Parameters as defined in section 3.6.1 and 3.8 of IAMF.
+ * @}
+ *
+ * @defgroup lavu_iamf_audio Audio Element
+ * @ingroup lavu_iamf
+ * @{
+ * Audio Elements as defined in section 3.6 of IAMF.
+ * @}
+ *
+ * @defgroup lavu_iamf_mix Mix Presentation
+ * @ingroup lavu_iamf
+ * @{
+ * Mix Presentations as defined in section 3.7 of IAMF.
+ * @}
+ *
+ * @addtogroup lavu_iamf_params
+ * @{
+ */
+enum AVIAMFAnimationType {
+    AV_IAMF_ANIMATION_TYPE_STEP,
+    AV_IAMF_ANIMATION_TYPE_LINEAR,
+    AV_IAMF_ANIMATION_TYPE_BEZIER,
+};
+
+/**
+ * Mix Gain Parameter Data as defined in section 3.8.1 of IAMF.
+ *
+ * @note This struct's size is not a part of the public ABI.
+ */
+typedef struct AVIAMFMixGain {
+    const AVClass *av_class;
+
+    /**
+     * Duration for the given subblock, in units of
+     * 1 / @ref AVIAMFParamDefinition.parameter_rate "parameter_rate".
+     * It must not be 0.
+     */
+    unsigned int subblock_duration;
+    /**
+     * The type of animation applied to the parameter values.
+     */
+    enum AVIAMFAnimationType animation_type;
+    /**
+     * Parameter value that is applied at the start of the subblock.
+     * Applies to all defined Animation Types.
+     *
+     * Valid range of values is -128.0 to 128.0
+     */
+    AVRational start_point_value;
+    /**
+     * Parameter value that is applied at the end of the subblock.
+     * Applies only to AV_IAMF_ANIMATION_TYPE_LINEAR and
+     * AV_IAMF_ANIMATION_TYPE_BEZIER Animation Types.
+     *
+     * Valid range of values is -128.0 to 128.0
+     */
+    AVRational end_point_value;
+    /**
+     * Parameter value of the middle control point of a quadratic Bezier
+     * curve, i.e., its y-axis value.
+     * Applies only to AV_IAMF_ANIMATION_TYPE_BEZIER Animation Type.
+     *
+     * Valid range of values is -128.0 to 128.0
+     */
+    AVRational control_point_value;
+    /**
+     * Parameter value of the time of the middle control point of a
+     * quadratic Bezier curve, i.e., its x-axis value.
+     * Applies only to AV_IAMF_ANIMATION_TYPE_BEZIER Animation Type.
+     *
+     * Valid range of values is 0.0 to 1.0
+     */
+    AVRational control_point_relative_time;
+} AVIAMFMixGain;
+
+/**
+ * Demixing Info Parameter Data as defined in section 3.8.2 of IAMF.
+ *
+ * @note This struct's size is not a part of the public ABI.
+ */
+typedef struct AVIAMFDemixingInfo {
+    const AVClass *av_class;
+
+    /**
+     * Duration for the given subblock, in units of
+     * 1 / @ref AVIAMFParamDefinition.parameter_rate "parameter_rate".
+     * It must not be 0.
+     */
+    unsigned int subblock_duration;
+    /**
+     * Pre-defined combination of demixing parameters.
+     */
+    unsigned int dmixp_mode;
+} AVIAMFDemixingInfo;
+
+/**
+ * Recon Gain Info Parameter Data as defined in section 3.8.3 of IAMF.
+ *
+ * @note This struct's size is not a part of the public ABI.
+ */
+typedef struct AVIAMFReconGain {
+    const AVClass *av_class;
+
+    /**
+     * Duration for the given subblock, in units of
+     * 1 / @ref AVIAMFParamDefinition.parameter_rate "parameter_rate".
+     * It must not be 0.
+     */
+    unsigned int subblock_duration;
+
+    /**
+     * Array of gain values to be applied to each channel for each layer
+     * defined in the Audio Element referencing the parent Parameter Definition.
+     * Values for layers where the AV_IAMF_LAYER_FLAG_RECON_GAIN flag is not set
+     * are undefined.
+     *
+     * Channel order is: FL, C, FR, SL, SR, TFL, TFR, BL, BR, TBL, TBR, LFE
+     */
+    uint8_t recon_gain[6][12];
+} AVIAMFReconGain;
+
+enum AVIAMFParamDefinitionType {
+   /**
+    * Subblocks are of struct type AVIAMFMixGain
+    */
+    AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN,
+   /**
+    * Subblocks are of struct type AVIAMFDemixingInfo
+    */
+    AV_IAMF_PARAMETER_DEFINITION_DEMIXING,
+   /**
+    * Subblocks are of struct type AVIAMFReconGain
+    */
+    AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN,
+};
+
+/**
+ * Parameters as defined in section 3.6.1 of IAMF.
+ *
+ * The struct is allocated by av_iamf_param_definition_alloc() along with an
+ * array of subblocks, its type depending on the value of type.
+ * This array is placed subblocks_offset bytes after the start of this struct.
+ *
+ * @note This struct's size is not a part of the public ABI.
+ */
+typedef struct AVIAMFParamDefinition {
+    const AVClass *av_class;
+
+    /**
+     * Offset in bytes from the start of this struct, at which the subblocks
+     * array is located.
+     */
+    size_t subblocks_offset;
+    /**
+     * Size in bytes of each element in the subblocks array.
+     */
+    size_t subblock_size;
+    /**
+     * Number of subblocks in the array.
+     */
+    unsigned int nb_subblocks;
+
+    /**
+     * Parameters type. Determines the type of the subblock elements.
+     */
+    enum AVIAMFParamDefinitionType type;
+
+    /**
+     * Identifier for the paremeter substream.
+     */
+    unsigned int parameter_id;
+    /**
+     * Sample rate for the paremeter substream. It must not be 0.
+     */
+    unsigned int parameter_rate;
+
+    /**
+     * The accumulated duration of all blocks in this parameter definition,
+     * in units of 1 / @ref parameter_rate.
+     *
+     * May be 0, in which case all duration values should be specified in
+     * another parameter definition referencing the same parameter_id.
+     */
+    unsigned int duration;
+    /**
+     * The duration of every subblock in the case where all subblocks, with
+     * the optional exception of the last subblock, have equal durations.
+     *
+     * Must be 0 if subblocks have different durations.
+     */
+    unsigned int constant_subblock_duration;
+} AVIAMFParamDefinition;
+
+const AVClass *av_iamf_param_definition_get_class(void);
+
+/**
+ * Allocates memory for AVIAMFParamDefinition, plus an array of {@code nb_subblocks}
+ * amount of subblocks of the given type and initializes the variables. Can be
+ * freed with a normal av_free() call.
+ *
+ * @param size if non-NULL, the size in bytes of the resulting data array is written here.
+ */
+AVIAMFParamDefinition *av_iamf_param_definition_alloc(enum AVIAMFParamDefinitionType type,
+                                                      unsigned int nb_subblocks, size_t *size);
+
+/**
+ * Get the subblock at the specified {@code idx}. Must be between 0 and nb_subblocks - 1.
+ *
+ * The @ref AVIAMFParamDefinition.type "param definition type" defines
+ * the struct type of the returned pointer.
+ */
+static av_always_inline void*
+av_iamf_param_definition_get_subblock(const AVIAMFParamDefinition *par, unsigned int idx)
+{
+    av_assert0(idx < par->nb_subblocks);
+    return (void *)((uint8_t *)par + par->subblocks_offset + idx * par->subblock_size);
+}
+
+/**
+ * @}
+ * @addtogroup lavu_iamf_audio
+ * @{
+ */
+
+enum AVIAMFAmbisonicsMode {
+    AV_IAMF_AMBISONICS_MODE_MONO,
+    AV_IAMF_AMBISONICS_MODE_PROJECTION,
+};
+
+/**
+ * Recon gain information for the layer is present in AVIAMFReconGain
+ */
+#define AV_IAMF_LAYER_FLAG_RECON_GAIN (1 << 0)
+
+/**
+ * A layer defining a Channel Layout in the Audio Element.
+ *
+ * When @ref AVIAMFAudioElement.audio_element_type "the parent's Audio Element type"
+ * is AV_IAMF_AUDIO_ELEMENT_TYPE_CHANNEL, this corresponds to an Scalable Channel
+ * Layout layer as defined in section 3.6.2 of IAMF.
+ * For AV_IAMF_AUDIO_ELEMENT_TYPE_SCENE, it is an Ambisonics channel
+ * layout as defined in section 3.6.3 of IAMF.
+ *
+ * @note The struct should be allocated with av_iamf_audio_element_add_layer()
+ *       and its size is not a part of the public ABI.
+ */
+typedef struct AVIAMFLayer {
+    const AVClass *av_class;
+
+    AVChannelLayout ch_layout;
+
+    /**
+     * A bitmask which may contain a combination of AV_IAMF_LAYER_FLAG_* flags.
+     */
+    unsigned int flags;
+    /**
+     * Output gain channel flags as defined in section 3.6.2 of IAMF.
+     *
+     * This field is defined only if @ref AVIAMFAudioElement.audio_element_type
+     * "the parent's Audio Element type" is AV_IAMF_AUDIO_ELEMENT_TYPE_CHANNEL,
+     * must be 0 otherwise.
+     */
+    unsigned int output_gain_flags;
+    /**
+     * Output gain as defined in section 3.6.2 of IAMF.
+     *
+     * Must be 0 if @ref output_gain_flags is 0.
+     */
+    AVRational output_gain;
+    /**
+     * Ambisonics mode as defined in section 3.6.3 of IAMF.
+     *
+     * This field is defined only if @ref AVIAMFAudioElement.audio_element_type
+     * "the parent's Audio Element type" is AV_IAMF_AUDIO_ELEMENT_TYPE_SCENE.
+     *
+     * If AV_IAMF_AMBISONICS_MODE_MONO, channel_mapping is defined implicitly
+     * (Ambisonic Order) or explicitly (Custom Order with ambi channels) in
+     * @ref ch_layout.
+     * If AV_IAMF_AMBISONICS_MODE_PROJECTION, @ref demixing_matrix must be set.
+     */
+    enum AVIAMFAmbisonicsMode ambisonics_mode;
+
+    /**
+     * Demixing matrix as defined in section 3.6.3 of IAMF.
+     *
+     * The length of the array is ch_layout.nb_channels multiplied by the sum of
+     * the amount of streams in the group plus the amount of streams in the group
+     * that are stereo.
+     *
+     * May be set only if @ref ambisonics_mode == AV_IAMF_AMBISONICS_MODE_PROJECTION,
+     * must be NULL otherwise.
+     */
+    AVRational *demixing_matrix;
+} AVIAMFLayer;
+
+
+enum AVIAMFAudioElementType {
+    AV_IAMF_AUDIO_ELEMENT_TYPE_CHANNEL,
+    AV_IAMF_AUDIO_ELEMENT_TYPE_SCENE,
+};
+
+/**
+ * Information on how to combine one or more audio streams, as defined in
+ * section 3.6 of IAMF.
+ *
+ * @note The struct should be allocated with av_iamf_audio_element_alloc()
+ *       and its size is not a part of the public ABI.
+ */
+typedef struct AVIAMFAudioElement {
+    const AVClass *av_class;
+
+    AVIAMFLayer **layers;
+    /**
+     * Number of layers, or channel groups, in the Audio Element.
+     * There may be 6 layers at most, and for @ref audio_element_type
+     * AV_IAMF_AUDIO_ELEMENT_TYPE_SCENE, there may be exactly 1.
+     *
+     * Set by av_iamf_audio_element_add_layer(), must not be
+     * modified by any other code.
+     */
+    unsigned int nb_layers;
+
+    /**
+     * Demixing information used to reconstruct a scalable channel audio
+     * representation.
+     * The @ref AVIAMFParamDefinition.type "type" must be
+     * AV_IAMF_PARAMETER_DEFINITION_DEMIXING.
+     */
+    AVIAMFParamDefinition *demixing_info;
+    /**
+     * Recon gain information used to reconstruct a scalable channel audio
+     * representation.
+     * The @ref AVIAMFParamDefinition.type "type" must be
+     * AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN.
+     */
+    AVIAMFParamDefinition *recon_gain_info;
+
+    /**
+     * Audio element type as defined in section 3.6 of IAMF.
+     */
+    enum AVIAMFAudioElementType audio_element_type;
+
+    /**
+     * Default weight value as defined in section 3.6 of IAMF.
+     */
+    unsigned int default_w;
+} AVIAMFAudioElement;
+
+const AVClass *av_iamf_audio_element_get_class(void);
+
+/**
+ * Allocates a AVIAMFAudioElement, and initializes its fields with default values.
+ * No layers are allocated. Must be freed with av_iamf_audio_element_free().
+ *
+ * @see av_iamf_audio_element_add_layer()
+ */
+AVIAMFAudioElement *av_iamf_audio_element_alloc(void);
+
+/**
+ * Allocate a layer and add it to a given AVIAMFAudioElement.
+ * It is freed by av_iamf_audio_element_free() alongside the rest of the parent
+ * AVIAMFAudioElement.
+ *
+ * @return a pointer to the allocated layer.
+ */
+AVIAMFLayer *av_iamf_audio_element_add_layer(AVIAMFAudioElement *audio_element);
+
+/**
+ * Free an AVIAMFAudioElement and all its contents.
+ *
+ * @param audio_element pointer to pointer to an allocated AVIAMFAudioElement.
+ *                      upon return, *audio_element will be set to NULL.
+ */
+void av_iamf_audio_element_free(AVIAMFAudioElement **audio_element);
+
+/**
+ * @}
+ * @addtogroup lavu_iamf_mix
+ * @{
+ */
+
+enum AVIAMFHeadphonesMode {
+    /**
+     * The referenced Audio Element shall be rendered to stereo loudspeakers.
+     */
+    AV_IAMF_HEADPHONES_MODE_STEREO,
+    /**
+     * The referenced Audio Element shall be rendered with a binaural renderer.
+     */
+    AV_IAMF_HEADPHONES_MODE_BINAURAL,
+};
+
+/**
+ * Submix element as defined in section 3.7 of IAMF.
+ *
+ * @note The struct should be allocated with av_iamf_submix_add_element()
+ *       and its size is not a part of the public ABI.
+ */
+typedef struct AVIAMFSubmixElement {
+    const AVClass *av_class;
+
+    /**
+     * The id of the Audio Element this submix element references.
+     */
+    unsigned int audio_element_id;
+
+    /**
+     * Information required required for applying any processing to the
+     * referenced and rendered Audio Element before being summed with other
+     * processed Audio Elements.
+     * The @ref AVIAMFParamDefinition.type "type" must be
+     * AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN.
+     */
+    AVIAMFParamDefinition *element_mix_config;
+
+    /**
+     * Default mix gain value to apply when there are no AVIAMFParamDefinition
+     * with @ref element_mix_config "element_mix_config's"
+     * @ref AVIAMFParamDefinition.parameter_id "parameter_id" available for a
+     * given audio frame.
+     */
+    AVRational default_mix_gain;
+
+    /**
+     * A value that indicates whether the referenced channel-based Audio Element
+     * shall be rendered to stereo loudspeakers or spatialized with a binaural
+     * renderer when played back on headphones.
+     * If the Audio Element is not of @ref AVIAMFAudioElement.audio_element_type
+     * "type" AV_IAMF_AUDIO_ELEMENT_TYPE_CHANNEL, then this field is undefined.
+     */
+    enum AVIAMFHeadphonesMode headphones_rendering_mode;
+
+    /**
+     * A dictionary of strings describing the submix in different languages.
+     * Must have the same amount of entries as
+     * @ref AVIAMFMixPresentation.annotations "the mix's annotations", stored
+     * in the same order, and with the same key strings.
+     *
+     * @ref AVDictionaryEntry.key "key" is a string conforming to BCP-47 that
+     * specifies the language for the string stored in
+     * @ref AVDictionaryEntry.value "value".
+     */
+    AVDictionary *annotations;
+} AVIAMFSubmixElement;
+
+enum AVIAMFSubmixLayoutType {
+    /**
+     * The layout follows the loudspeaker sound system convention of ITU-2051-3.
+     * @ref AVIAMFSubmixLayout.sound_system must be set.
+     */
+    AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS = 2,
+    /**
+     * The layout is binaural.
+     *
+     * @note @ref AVIAMFSubmixLayout.sound_system may be set to
+     * AV_CHANNEL_LAYOUT_BINAURAL to simplify API usage, but it's not mandatory.
+     */
+    AV_IAMF_SUBMIX_LAYOUT_TYPE_BINAURAL = 3,
+};
+
+/**
+ * Submix layout as defined in section 3.7.6 of IAMF.
+ *
+ * @note The struct should be allocated with av_iamf_submix_add_layout()
+ *       and its size is not a part of the public ABI.
+ */
+typedef struct AVIAMFSubmixLayout {
+    const AVClass *av_class;
+
+    enum AVIAMFSubmixLayoutType layout_type;
+
+    /**
+     * Channel layout matching one of Sound Systems A to J of ITU-2051-3, plus
+     * 7.1.2ch, 3.1.2ch, and binaural.
+     * If layout_type is not AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS or
+     * AV_IAMF_SUBMIX_LAYOUT_TYPE_BINAURAL, this field is undefined.
+     */
+    AVChannelLayout sound_system;
+    /**
+     * The program integrated loudness information, as defined in
+     * ITU-1770-4.
+     */
+    AVRational integrated_loudness;
+    /**
+     * The digital (sampled) peak value of the audio signal, as defined
+     * in ITU-1770-4.
+     */
+    AVRational digital_peak;
+    /**
+     * The true peak of the audio signal, as defined in ITU-1770-4.
+     */
+    AVRational true_peak;
+    /**
+     * The Dialogue loudness information, as defined in ITU-1770-4.
+     */
+    AVRational dialogue_anchored_loudness;
+    /**
+     * The Album loudness information, as defined in ITU-1770-4.
+     */
+    AVRational album_anchored_loudness;
+} AVIAMFSubmixLayout;
+
+/**
+ * Submix layout as defined in section 3.7 of IAMF.
+ *
+ * @note The struct should be allocated with av_iamf_mix_presentation_add_submix()
+ *       and its size is not a part of the public ABI.
+ */
+typedef struct AVIAMFSubmix {
+    const AVClass *av_class;
+
+    /**
+     * Array of submix elements.
+     *
+     * Set by av_iamf_submix_add_element(), must not be modified by any
+     * other code.
+     */
+    AVIAMFSubmixElement **elements;
+    /**
+     * Number of elements in the submix.
+     *
+     * Set by av_iamf_submix_add_element(), must not be modified by any
+     * other code.
+     */
+    unsigned int nb_elements;
+
+    /**
+     * Array of submix layouts.
+     *
+     * Set by av_iamf_submix_add_layout(), must not be modified by any
+     * other code.
+     */
+    AVIAMFSubmixLayout **layouts;
+    /**
+     * Number of layouts in the submix.
+     *
+     * Set by av_iamf_submix_add_layout(), must not be modified by any
+     * other code.
+     */
+    unsigned int nb_layouts;
+
+    /**
+     * Information required for post-processing the mixed audio signal to
+     * generate the audio signal for playback.
+     * The @ref AVIAMFParamDefinition.type "type" must be
+     * AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN.
+     */
+    AVIAMFParamDefinition *output_mix_config;
+
+    /**
+     * Default mix gain value to apply when there are no AVIAMFParamDefinition
+     * with @ref output_mix_config "output_mix_config's"
+     * @ref AVIAMFParamDefinition.parameter_id "parameter_id" available for a
+     * given audio frame.
+     */
+    AVRational default_mix_gain;
+} AVIAMFSubmix;
+
+/**
+ * Information on how to render and mix one or more AVIAMFAudioElement to generate
+ * the final audio output, as defined in section 3.7 of IAMF.
+ *
+ * @note The struct should be allocated with av_iamf_mix_presentation_alloc()
+ *       and its size is not a part of the public ABI.
+ */
+typedef struct AVIAMFMixPresentation {
+    const AVClass *av_class;
+
+    /**
+     * Array of submixes.
+     *
+     * Set by av_iamf_mix_presentation_add_submix(), must not be modified
+     * by any other code.
+     */
+    AVIAMFSubmix **submixes;
+    /**
+     * Number of submixes in the presentation.
+     *
+     * Set by av_iamf_mix_presentation_add_submix(), must not be modified
+     * by any other code.
+     */
+    unsigned int nb_submixes;
+
+    /**
+     * A dictionary of strings describing the mix in different languages.
+     * Must have the same amount of entries as every
+     * @ref AVIAMFSubmixElement.annotations "Submix element annotations",
+     * stored in the same order, and with the same key strings.
+     *
+     * @ref AVDictionaryEntry.key "key" is a string conforming to BCP-47
+     * that specifies the language for the string stored in
+     * @ref AVDictionaryEntry.value "value".
+     */
+    AVDictionary *annotations;
+} AVIAMFMixPresentation;
+
+const AVClass *av_iamf_mix_presentation_get_class(void);
+
+/**
+ * Allocates a AVIAMFMixPresentation, and initializes its fields with default
+ * values. No submixes are allocated.
+ * Must be freed with av_iamf_mix_presentation_free().
+ *
+ * @see av_iamf_mix_presentation_add_submix()
+ */
+AVIAMFMixPresentation *av_iamf_mix_presentation_alloc(void);
+
+/**
+ * Allocate a submix and add it to a given AVIAMFMixPresentation.
+ * It is freed by av_iamf_mix_presentation_free() alongside the rest of the
+ * parent AVIAMFMixPresentation.
+ *
+ * @return a pointer to the allocated submix.
+ */
+AVIAMFSubmix *av_iamf_mix_presentation_add_submix(AVIAMFMixPresentation *mix_presentation);
+
+/**
+ * Allocate a submix element and add it to a given AVIAMFSubmix.
+ * It is freed by av_iamf_mix_presentation_free() alongside the rest of the
+ * parent AVIAMFSubmix.
+ *
+ * @return a pointer to the allocated submix.
+ */
+AVIAMFSubmixElement *av_iamf_submix_add_element(AVIAMFSubmix *submix);
+
+/**
+ * Allocate a submix layout and add it to a given AVIAMFSubmix.
+ * It is freed by av_iamf_mix_presentation_free() alongside the rest of the
+ * parent AVIAMFSubmix.
+ *
+ * @return a pointer to the allocated submix.
+ */
+AVIAMFSubmixLayout *av_iamf_submix_add_layout(AVIAMFSubmix *submix);
+
+/**
+ * Free an AVIAMFMixPresentation and all its contents.
+ *
+ * @param mix_presentation pointer to pointer to an allocated AVIAMFMixPresentation.
+ *                         upon return, *mix_presentation will be set to NULL.
+ */
+void av_iamf_mix_presentation_free(AVIAMFMixPresentation **mix_presentation);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_IAMF_H */

ffmpeg/include/libavutil/imgutils.h

@@ -0,0 +1,377 @@
+/*
+ * 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_IMGUTILS_H
+#define AVUTIL_IMGUTILS_H
+
+/**
+ * @file
+ * misc image utilities
+ *
+ * @addtogroup lavu_picture
+ * @{
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+#include "pixdesc.h"
+#include "pixfmt.h"
+#include "rational.h"
+
+/**
+ * Compute the max pixel step for each plane of an image with a
+ * format described by pixdesc.
+ *
+ * The pixel step is the distance in bytes between the first byte of
+ * the group of bytes which describe a pixel component and the first
+ * byte of the successive group in the same plane for the same
+ * component.
+ *
+ * @param max_pixsteps an array which is filled with the max pixel step
+ * for each plane. Since a plane may contain different pixel
+ * components, the computed max_pixsteps[plane] is relative to the
+ * component in the plane with the max pixel step.
+ * @param max_pixstep_comps an array which is filled with the component
+ * for each plane which has the max pixel step. May be NULL.
+ * @param pixdesc the AVPixFmtDescriptor for the image, describing its format
+ */
+void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
+                                const AVPixFmtDescriptor *pixdesc);
+
+/**
+ * Compute the size of an image line with format pix_fmt and width
+ * width for the plane plane.
+ *
+ * @return the computed size in bytes
+ */
+int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane);
+
+/**
+ * Fill plane linesizes for an image with pixel format pix_fmt and
+ * width width.
+ *
+ * @param linesizes array to be filled with the linesize for each plane
+ * @param pix_fmt the AVPixelFormat of the image
+ * @param width width of the image in pixels
+ * @return >= 0 in case of success, a negative error code otherwise
+ */
+int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width);
+
+/**
+ * Fill plane sizes for an image with pixel format pix_fmt and height height.
+ *
+ * @param size the array to be filled with the size of each image plane
+ * @param pix_fmt the AVPixelFormat of the image
+ * @param height height of the image in pixels
+ * @param linesizes the array containing the linesize for each
+ *        plane, should be filled by av_image_fill_linesizes()
+ * @return >= 0 in case of success, a negative error code otherwise
+ *
+ * @note The linesize parameters have the type ptrdiff_t here, while they are
+ *       int for av_image_fill_linesizes().
+ */
+int av_image_fill_plane_sizes(size_t size[4], enum AVPixelFormat pix_fmt,
+                              int height, const ptrdiff_t linesizes[4]);
+
+/**
+ * Fill plane data pointers for an image with pixel format pix_fmt and
+ * height height.
+ *
+ * @param data pointers array to be filled with the pointer for each image plane
+ * @param pix_fmt the AVPixelFormat of the image
+ * @param height height of the image in pixels
+ * @param ptr the pointer to a buffer which will contain the image
+ * @param linesizes the array containing the linesize for each
+ * plane, should be filled by av_image_fill_linesizes()
+ * @return the size in bytes required for the image buffer, a negative
+ * error code in case of failure
+ */
+int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height,
+                           uint8_t *ptr, const int linesizes[4]);
+
+/**
+ * Allocate an image with size w and h and pixel format pix_fmt, and
+ * fill pointers and linesizes accordingly.
+ * The allocated image buffer has to be freed by using
+ * av_freep(&pointers[0]).
+ *
+ * @param pointers array to be filled with the pointer for each image plane
+ * @param linesizes the array filled with the linesize for each plane
+ * @param w width of the image in pixels
+ * @param h height of the image in pixels
+ * @param pix_fmt the AVPixelFormat of the image
+ * @param align the value to use for buffer size alignment
+ * @return the size in bytes required for the image buffer, a negative
+ * error code in case of failure
+ */
+int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
+                   int w, int h, enum AVPixelFormat pix_fmt, int align);
+
+/**
+ * Copy image plane from src to dst.
+ * That is, copy "height" number of lines of "bytewidth" bytes each.
+ * The first byte of each successive line is separated by *_linesize
+ * bytes.
+ *
+ * bytewidth must be contained by both absolute values of dst_linesize
+ * and src_linesize, otherwise the function behavior is undefined.
+ *
+ * @param dst          destination plane to copy to
+ * @param dst_linesize linesize for the image plane in dst
+ * @param src          source plane to copy from
+ * @param src_linesize linesize for the image plane in src
+ * @param height       height (number of lines) of the plane
+ */
+void av_image_copy_plane(uint8_t       *dst, int dst_linesize,
+                         const uint8_t *src, int src_linesize,
+                         int bytewidth, int height);
+
+/**
+ * Copy image data located in uncacheable (e.g. GPU mapped) memory. Where
+ * available, this function will use special functionality for reading from such
+ * memory, which may result in greatly improved performance compared to plain
+ * av_image_copy_plane().
+ *
+ * bytewidth must be contained by both absolute values of dst_linesize
+ * and src_linesize, otherwise the function behavior is undefined.
+ *
+ * @note The linesize parameters have the type ptrdiff_t here, while they are
+ *       int for av_image_copy_plane().
+ * @note On x86, the linesizes currently need to be aligned to the cacheline
+ *       size (i.e. 64) to get improved performance.
+ */
+void av_image_copy_plane_uc_from(uint8_t       *dst, ptrdiff_t dst_linesize,
+                                 const uint8_t *src, ptrdiff_t src_linesize,
+                                 ptrdiff_t bytewidth, int height);
+
+/**
+ * Copy image in src_data to dst_data.
+ *
+ * @param dst_data      destination image data buffer to copy to
+ * @param dst_linesizes linesizes for the image in dst_data
+ * @param src_data      source image data buffer to copy from
+ * @param src_linesizes linesizes for the image in src_data
+ * @param pix_fmt       the AVPixelFormat of the image
+ * @param width         width of the image in pixels
+ * @param height        height of the image in pixels
+ */
+void av_image_copy(uint8_t * const dst_data[4], const int dst_linesizes[4],
+                   const uint8_t * const src_data[4], const int src_linesizes[4],
+                   enum AVPixelFormat pix_fmt, int width, int height);
+
+/**
+ * Wrapper around av_image_copy() to workaround the limitation
+ * that the conversion from uint8_t * const * to const uint8_t * const *
+ * is not performed automatically in C.
+ * @see av_image_copy()
+ */
+static inline
+void av_image_copy2(uint8_t * const dst_data[4], const int dst_linesizes[4],
+                    uint8_t * const src_data[4], const int src_linesizes[4],
+                    enum AVPixelFormat pix_fmt, int width, int height)
+{
+    av_image_copy(dst_data, dst_linesizes,
+                  (const uint8_t * const *)src_data, src_linesizes,
+                  pix_fmt, width, height);
+}
+
+/**
+ * Copy image data located in uncacheable (e.g. GPU mapped) memory. Where
+ * available, this function will use special functionality for reading from such
+ * memory, which may result in greatly improved performance compared to plain
+ * av_image_copy().
+ *
+ * The data pointers and the linesizes must be aligned to the maximum required
+ * by the CPU architecture.
+ *
+ * @note The linesize parameters have the type ptrdiff_t here, while they are
+ *       int for av_image_copy().
+ * @note On x86, the linesizes currently need to be aligned to the cacheline
+ *       size (i.e. 64) to get improved performance.
+ */
+void av_image_copy_uc_from(uint8_t * const dst_data[4],       const ptrdiff_t dst_linesizes[4],
+                           const uint8_t * const src_data[4], const ptrdiff_t src_linesizes[4],
+                           enum AVPixelFormat pix_fmt, int width, int height);
+
+/**
+ * Setup the data pointers and linesizes based on the specified image
+ * parameters and the provided array.
+ *
+ * The fields of the given image are filled in by using the src
+ * address which points to the image data buffer. Depending on the
+ * specified pixel format, one or multiple image data pointers and
+ * line sizes will be set.  If a planar format is specified, several
+ * pointers will be set pointing to the different picture planes and
+ * the line sizes of the different planes will be stored in the
+ * lines_sizes array. Call with src == NULL to get the required
+ * size for the src buffer.
+ *
+ * To allocate the buffer and fill in the dst_data and dst_linesize in
+ * one call, use av_image_alloc().
+ *
+ * @param dst_data      data pointers to be filled in
+ * @param dst_linesize  linesizes for the image in dst_data to be filled in
+ * @param src           buffer which will contain or contains the actual image data, can be NULL
+ * @param pix_fmt       the pixel format of the image
+ * @param width         the width of the image in pixels
+ * @param height        the height of the image in pixels
+ * @param align         the value used in src for linesize alignment
+ * @return the size in bytes required for src, a negative error code
+ * in case of failure
+ */
+int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4],
+                         const uint8_t *src,
+                         enum AVPixelFormat pix_fmt, int width, int height, int align);
+
+/**
+ * Return the size in bytes of the amount of data required to store an
+ * image with the given parameters.
+ *
+ * @param pix_fmt  the pixel format of the image
+ * @param width    the width of the image in pixels
+ * @param height   the height of the image in pixels
+ * @param align    the assumed linesize alignment
+ * @return the buffer size in bytes, a negative error code in case of failure
+ */
+int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align);
+
+/**
+ * Copy image data from an image into a buffer.
+ *
+ * av_image_get_buffer_size() can be used to compute the required size
+ * for the buffer to fill.
+ *
+ * @param dst           a buffer into which picture data will be copied
+ * @param dst_size      the size in bytes of dst
+ * @param src_data      pointers containing the source image data
+ * @param src_linesize  linesizes for the image in src_data
+ * @param pix_fmt       the pixel format of the source image
+ * @param width         the width of the source image in pixels
+ * @param height        the height of the source image in pixels
+ * @param align         the assumed linesize alignment for dst
+ * @return the number of bytes written to dst, or a negative value
+ * (error code) on error
+ */
+int av_image_copy_to_buffer(uint8_t *dst, int dst_size,
+                            const uint8_t * const src_data[4], const int src_linesize[4],
+                            enum AVPixelFormat pix_fmt, int width, int height, int align);
+
+/**
+ * Check if the given dimension of an image is valid, meaning that all
+ * bytes of the image can be addressed with a signed int.
+ *
+ * @param w the width of the picture
+ * @param h the height of the picture
+ * @param log_offset the offset to sum to the log level for logging with log_ctx
+ * @param log_ctx the parent logging context, it may be NULL
+ * @return >= 0 if valid, a negative error code otherwise
+ */
+int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx);
+
+/**
+ * Check if the given dimension of an image is valid, meaning that all
+ * bytes of a plane of an image with the specified pix_fmt can be addressed
+ * with a signed int.
+ *
+ * @param w the width of the picture
+ * @param h the height of the picture
+ * @param max_pixels the maximum number of pixels the user wants to accept
+ * @param pix_fmt the pixel format, can be AV_PIX_FMT_NONE if unknown.
+ * @param log_offset the offset to sum to the log level for logging with log_ctx
+ * @param log_ctx the parent logging context, it may be NULL
+ * @return >= 0 if valid, a negative error code otherwise
+ */
+int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx);
+
+/**
+ * Check if the given sample aspect ratio of an image is valid.
+ *
+ * It is considered invalid if the denominator is 0 or if applying the ratio
+ * to the image size would make the smaller dimension less than 1. If the
+ * sar numerator is 0, it is considered unknown and will return as valid.
+ *
+ * @param w width of the image
+ * @param h height of the image
+ * @param sar sample aspect ratio of the image
+ * @return 0 if valid, a negative AVERROR code otherwise
+ */
+int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar);
+
+/**
+ * Overwrite the image data with black. This is suitable for filling a
+ * sub-rectangle of an image, meaning the padding between the right most pixel
+ * and the left most pixel on the next line will not be overwritten. For some
+ * formats, the image size might be rounded up due to inherent alignment.
+ *
+ * If the pixel format has alpha, the alpha is cleared to opaque.
+ *
+ * This can return an error if the pixel format is not supported. Normally, all
+ * non-hwaccel pixel formats should be supported.
+ *
+ * Passing NULL for dst_data is allowed. Then the function returns whether the
+ * operation would have succeeded. (It can return an error if the pix_fmt is
+ * not supported.)
+ *
+ * @param dst_data      data pointers to destination image
+ * @param dst_linesize  linesizes for the destination image
+ * @param pix_fmt       the pixel format of the image
+ * @param range         the color range of the image (important for colorspaces such as YUV)
+ * @param width         the width of the image in pixels
+ * @param height        the height of the image in pixels
+ * @return 0 if the image data was cleared, a negative AVERROR code otherwise
+ */
+int av_image_fill_black(uint8_t * const dst_data[4], const ptrdiff_t dst_linesize[4],
+                        enum AVPixelFormat pix_fmt, enum AVColorRange range,
+                        int width, int height);
+
+/**
+ * Overwrite the image data with a color. This is suitable for filling a
+ * sub-rectangle of an image, meaning the padding between the right most pixel
+ * and the left most pixel on the next line will not be overwritten. For some
+ * formats, the image size might be rounded up due to inherent alignment.
+ *
+ * If the pixel format has alpha, it is also replaced. Color component values
+ * are interpreted as native integers (or intfloats) regardless of actual pixel
+ * format endianness.
+ *
+ * This can return an error if the pixel format is not supported. Normally, all
+ * non-hwaccel pixel formats should be supported.
+ *
+ * Passing NULL for dst_data is allowed. Then the function returns whether the
+ * operation would have succeeded. (It can return an error if the pix_fmt is
+ * not supported.)
+ *
+ * @param dst_data      data pointers to destination image
+ * @param dst_linesize  linesizes for the destination image
+ * @param pix_fmt       the pixel format of the image
+ * @param color         the color components to be used for the fill
+ * @param width         the width of the image in pixels
+ * @param height        the height of the image in pixels
+ * @param flags         currently unused
+ * @return 0 if the image data was filled, a negative AVERROR code otherwise
+ */
+int av_image_fill_color(uint8_t * const dst_data[4], const ptrdiff_t dst_linesize[4],
+                        enum AVPixelFormat pix_fmt, const uint32_t color[4],
+                        int width, int height, int flags);
+
+/**
+ * @}
+ */
+
+
+#endif /* AVUTIL_IMGUTILS_H */

ffmpeg/include/libavutil/intfloat.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2011 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_INTFLOAT_H
+#define AVUTIL_INTFLOAT_H
+
+#include <stdint.h>
+#include "attributes.h"
+
+union av_intfloat32 {
+    uint32_t i;
+    float    f;
+};
+
+union av_intfloat64 {
+    uint64_t i;
+    double   f;
+};
+
+/**
+ * Reinterpret a 32-bit integer as a float.
+ */
+static av_always_inline float av_int2float(uint32_t i)
+{
+    union av_intfloat32 v;
+    v.i = i;
+    return v.f;
+}
+
+/**
+ * Reinterpret a float as a 32-bit integer.
+ */
+static av_always_inline uint32_t av_float2int(float f)
+{
+    union av_intfloat32 v;
+    v.f = f;
+    return v.i;
+}
+
+/**
+ * Reinterpret a 64-bit integer as a double.
+ */
+static av_always_inline double av_int2double(uint64_t i)
+{
+    union av_intfloat64 v;
+    v.i = i;
+    return v.f;
+}
+
+/**
+ * Reinterpret a double as a 64-bit integer.
+ */
+static av_always_inline uint64_t av_double2int(double f)
+{
+    union av_intfloat64 v;
+    v.f = f;
+    return v.i;
+}
+
+#endif /* AVUTIL_INTFLOAT_H */

ffmpeg/include/libavutil/intreadwrite.h

@@ -0,0 +1,677 @@
+/*
+ * 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_INTREADWRITE_H
+#define AVUTIL_INTREADWRITE_H
+
+#include <stdint.h>
+#include "libavutil/avconfig.h"
+#include "attributes.h"
+#include "bswap.h"
+
+typedef union {
+    uint64_t u64;
+    uint32_t u32[2];
+    uint16_t u16[4];
+    uint8_t  u8 [8];
+    double   f64;
+    float    f32[2];
+} av_alias av_alias64;
+
+typedef union {
+    uint32_t u32;
+    uint16_t u16[2];
+    uint8_t  u8 [4];
+    float    f32;
+} av_alias av_alias32;
+
+typedef union {
+    uint16_t u16;
+    uint8_t  u8 [2];
+} av_alias av_alias16;
+
+/*
+ * Arch-specific headers can provide any combination of
+ * AV_[RW][BLN](16|24|32|48|64) and AV_(COPY|SWAP|ZERO)(64|128) macros.
+ * Preprocessor symbols must be defined, even if these are implemented
+ * as inline functions.
+ *
+ * R/W means read/write, B/L/N means big/little/native endianness.
+ * The following macros require aligned access, compared to their
+ * unaligned variants: AV_(COPY|SWAP|ZERO)(64|128), AV_[RW]N[8-64]A.
+ * Incorrect usage may range from abysmal performance to crash
+ * depending on the platform.
+ *
+ * The unaligned variants are AV_[RW][BLN][8-64] and AV_COPY*U.
+ */
+
+#ifdef HAVE_AV_CONFIG_H
+
+#include "config.h"
+
+#if ARCH_AARCH64
+#   include "aarch64/intreadwrite.h"
+#elif ARCH_MIPS
+#   include "mips/intreadwrite.h"
+#elif ARCH_PPC
+#   include "ppc/intreadwrite.h"
+#elif ARCH_X86
+#   include "x86/intreadwrite.h"
+#endif
+
+#endif /* HAVE_AV_CONFIG_H */
+
+/*
+ * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
+ */
+
+#if AV_HAVE_BIGENDIAN
+
+#   if    defined(AV_RN16) && !defined(AV_RB16)
+#       define AV_RB16(p) AV_RN16(p)
+#   elif !defined(AV_RN16) &&  defined(AV_RB16)
+#       define AV_RN16(p) AV_RB16(p)
+#   endif
+
+#   if    defined(AV_WN16) && !defined(AV_WB16)
+#       define AV_WB16(p, v) AV_WN16(p, v)
+#   elif !defined(AV_WN16) &&  defined(AV_WB16)
+#       define AV_WN16(p, v) AV_WB16(p, v)
+#   endif
+
+#   if    defined(AV_RN24) && !defined(AV_RB24)
+#       define AV_RB24(p) AV_RN24(p)
+#   elif !defined(AV_RN24) &&  defined(AV_RB24)
+#       define AV_RN24(p) AV_RB24(p)
+#   endif
+
+#   if    defined(AV_WN24) && !defined(AV_WB24)
+#       define AV_WB24(p, v) AV_WN24(p, v)
+#   elif !defined(AV_WN24) &&  defined(AV_WB24)
+#       define AV_WN24(p, v) AV_WB24(p, v)
+#   endif
+
+#   if    defined(AV_RN32) && !defined(AV_RB32)
+#       define AV_RB32(p) AV_RN32(p)
+#   elif !defined(AV_RN32) &&  defined(AV_RB32)
+#       define AV_RN32(p) AV_RB32(p)
+#   endif
+
+#   if    defined(AV_WN32) && !defined(AV_WB32)
+#       define AV_WB32(p, v) AV_WN32(p, v)
+#   elif !defined(AV_WN32) &&  defined(AV_WB32)
+#       define AV_WN32(p, v) AV_WB32(p, v)
+#   endif
+
+#   if    defined(AV_RN48) && !defined(AV_RB48)
+#       define AV_RB48(p) AV_RN48(p)
+#   elif !defined(AV_RN48) &&  defined(AV_RB48)
+#       define AV_RN48(p) AV_RB48(p)
+#   endif
+
+#   if    defined(AV_WN48) && !defined(AV_WB48)
+#       define AV_WB48(p, v) AV_WN48(p, v)
+#   elif !defined(AV_WN48) &&  defined(AV_WB48)
+#       define AV_WN48(p, v) AV_WB48(p, v)
+#   endif
+
+#   if    defined(AV_RN64) && !defined(AV_RB64)
+#       define AV_RB64(p) AV_RN64(p)
+#   elif !defined(AV_RN64) &&  defined(AV_RB64)
+#       define AV_RN64(p) AV_RB64(p)
+#   endif
+
+#   if    defined(AV_WN64) && !defined(AV_WB64)
+#       define AV_WB64(p, v) AV_WN64(p, v)
+#   elif !defined(AV_WN64) &&  defined(AV_WB64)
+#       define AV_WN64(p, v) AV_WB64(p, v)
+#   endif
+
+#else /* AV_HAVE_BIGENDIAN */
+
+#   if    defined(AV_RN16) && !defined(AV_RL16)
+#       define AV_RL16(p) AV_RN16(p)
+#   elif !defined(AV_RN16) &&  defined(AV_RL16)
+#       define AV_RN16(p) AV_RL16(p)
+#   endif
+
+#   if    defined(AV_WN16) && !defined(AV_WL16)
+#       define AV_WL16(p, v) AV_WN16(p, v)
+#   elif !defined(AV_WN16) &&  defined(AV_WL16)
+#       define AV_WN16(p, v) AV_WL16(p, v)
+#   endif
+
+#   if    defined(AV_RN24) && !defined(AV_RL24)
+#       define AV_RL24(p) AV_RN24(p)
+#   elif !defined(AV_RN24) &&  defined(AV_RL24)
+#       define AV_RN24(p) AV_RL24(p)
+#   endif
+
+#   if    defined(AV_WN24) && !defined(AV_WL24)
+#       define AV_WL24(p, v) AV_WN24(p, v)
+#   elif !defined(AV_WN24) &&  defined(AV_WL24)
+#       define AV_WN24(p, v) AV_WL24(p, v)
+#   endif
+
+#   if    defined(AV_RN32) && !defined(AV_RL32)
+#       define AV_RL32(p) AV_RN32(p)
+#   elif !defined(AV_RN32) &&  defined(AV_RL32)
+#       define AV_RN32(p) AV_RL32(p)
+#   endif
+
+#   if    defined(AV_WN32) && !defined(AV_WL32)
+#       define AV_WL32(p, v) AV_WN32(p, v)
+#   elif !defined(AV_WN32) &&  defined(AV_WL32)
+#       define AV_WN32(p, v) AV_WL32(p, v)
+#   endif
+
+#   if    defined(AV_RN48) && !defined(AV_RL48)
+#       define AV_RL48(p) AV_RN48(p)
+#   elif !defined(AV_RN48) &&  defined(AV_RL48)
+#       define AV_RN48(p) AV_RL48(p)
+#   endif
+
+#   if    defined(AV_WN48) && !defined(AV_WL48)
+#       define AV_WL48(p, v) AV_WN48(p, v)
+#   elif !defined(AV_WN48) &&  defined(AV_WL48)
+#       define AV_WN48(p, v) AV_WL48(p, v)
+#   endif
+
+#   if    defined(AV_RN64) && !defined(AV_RL64)
+#       define AV_RL64(p) AV_RN64(p)
+#   elif !defined(AV_RN64) &&  defined(AV_RL64)
+#       define AV_RN64(p) AV_RL64(p)
+#   endif
+
+#   if    defined(AV_WN64) && !defined(AV_WL64)
+#       define AV_WL64(p, v) AV_WN64(p, v)
+#   elif !defined(AV_WN64) &&  defined(AV_WL64)
+#       define AV_WN64(p, v) AV_WL64(p, v)
+#   endif
+
+#endif /* !AV_HAVE_BIGENDIAN */
+
+/*
+ * Define AV_[RW]N helper macros to simplify definitions not provided
+ * by per-arch headers.
+ */
+
+#if defined(__GNUC__) || defined(__clang__)
+
+union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;
+union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;
+union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
+
+#   define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)
+#   define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))
+
+#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_X64) || defined(_M_ARM64)) && AV_HAVE_FAST_UNALIGNED
+
+#   define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
+#   define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
+
+#elif AV_HAVE_FAST_UNALIGNED
+
+#   define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)
+#   define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))
+
+#else
+
+#ifndef AV_RB16
+#   define AV_RB16(x)                           \
+    ((((const uint8_t*)(x))[0] << 8) |          \
+      ((const uint8_t*)(x))[1])
+#endif
+#ifndef AV_WB16
+#   define AV_WB16(p, val) do {                 \
+        uint16_t d = (val);                     \
+        ((uint8_t*)(p))[1] = (d);               \
+        ((uint8_t*)(p))[0] = (d)>>8;            \
+    } while(0)
+#endif
+
+#ifndef AV_RL16
+#   define AV_RL16(x)                           \
+    ((((const uint8_t*)(x))[1] << 8) |          \
+      ((const uint8_t*)(x))[0])
+#endif
+#ifndef AV_WL16
+#   define AV_WL16(p, val) do {                 \
+        uint16_t d = (val);                     \
+        ((uint8_t*)(p))[0] = (d);               \
+        ((uint8_t*)(p))[1] = (d)>>8;            \
+    } while(0)
+#endif
+
+#ifndef AV_RB32
+#   define AV_RB32(x)                                \
+    (((uint32_t)((const uint8_t*)(x))[0] << 24) |    \
+               (((const uint8_t*)(x))[1] << 16) |    \
+               (((const uint8_t*)(x))[2] <<  8) |    \
+                ((const uint8_t*)(x))[3])
+#endif
+#ifndef AV_WB32
+#   define AV_WB32(p, val) do {                 \
+        uint32_t d = (val);                     \
+        ((uint8_t*)(p))[3] = (d);               \
+        ((uint8_t*)(p))[2] = (d)>>8;            \
+        ((uint8_t*)(p))[1] = (d)>>16;           \
+        ((uint8_t*)(p))[0] = (d)>>24;           \
+    } while(0)
+#endif
+
+#ifndef AV_RL32
+#   define AV_RL32(x)                                \
+    (((uint32_t)((const uint8_t*)(x))[3] << 24) |    \
+               (((const uint8_t*)(x))[2] << 16) |    \
+               (((const uint8_t*)(x))[1] <<  8) |    \
+                ((const uint8_t*)(x))[0])
+#endif
+#ifndef AV_WL32
+#   define AV_WL32(p, val) do {                 \
+        uint32_t d = (val);                     \
+        ((uint8_t*)(p))[0] = (d);               \
+        ((uint8_t*)(p))[1] = (d)>>8;            \
+        ((uint8_t*)(p))[2] = (d)>>16;           \
+        ((uint8_t*)(p))[3] = (d)>>24;           \
+    } while(0)
+#endif
+
+#ifndef AV_RB64
+#   define AV_RB64(x)                                   \
+    (((uint64_t)((const uint8_t*)(x))[0] << 56) |       \
+     ((uint64_t)((const uint8_t*)(x))[1] << 48) |       \
+     ((uint64_t)((const uint8_t*)(x))[2] << 40) |       \
+     ((uint64_t)((const uint8_t*)(x))[3] << 32) |       \
+     ((uint64_t)((const uint8_t*)(x))[4] << 24) |       \
+     ((uint64_t)((const uint8_t*)(x))[5] << 16) |       \
+     ((uint64_t)((const uint8_t*)(x))[6] <<  8) |       \
+      (uint64_t)((const uint8_t*)(x))[7])
+#endif
+#ifndef AV_WB64
+#   define AV_WB64(p, val) do {                 \
+        uint64_t d = (val);                     \
+        ((uint8_t*)(p))[7] = (d);               \
+        ((uint8_t*)(p))[6] = (d)>>8;            \
+        ((uint8_t*)(p))[5] = (d)>>16;           \
+        ((uint8_t*)(p))[4] = (d)>>24;           \
+        ((uint8_t*)(p))[3] = (d)>>32;           \
+        ((uint8_t*)(p))[2] = (d)>>40;           \
+        ((uint8_t*)(p))[1] = (d)>>48;           \
+        ((uint8_t*)(p))[0] = (d)>>56;           \
+    } while(0)
+#endif
+
+#ifndef AV_RL64
+#   define AV_RL64(x)                                   \
+    (((uint64_t)((const uint8_t*)(x))[7] << 56) |       \
+     ((uint64_t)((const uint8_t*)(x))[6] << 48) |       \
+     ((uint64_t)((const uint8_t*)(x))[5] << 40) |       \
+     ((uint64_t)((const uint8_t*)(x))[4] << 32) |       \
+     ((uint64_t)((const uint8_t*)(x))[3] << 24) |       \
+     ((uint64_t)((const uint8_t*)(x))[2] << 16) |       \
+     ((uint64_t)((const uint8_t*)(x))[1] <<  8) |       \
+      (uint64_t)((const uint8_t*)(x))[0])
+#endif
+#ifndef AV_WL64
+#   define AV_WL64(p, val) do {                 \
+        uint64_t d = (val);                     \
+        ((uint8_t*)(p))[0] = (d);               \
+        ((uint8_t*)(p))[1] = (d)>>8;            \
+        ((uint8_t*)(p))[2] = (d)>>16;           \
+        ((uint8_t*)(p))[3] = (d)>>24;           \
+        ((uint8_t*)(p))[4] = (d)>>32;           \
+        ((uint8_t*)(p))[5] = (d)>>40;           \
+        ((uint8_t*)(p))[6] = (d)>>48;           \
+        ((uint8_t*)(p))[7] = (d)>>56;           \
+    } while(0)
+#endif
+
+#if AV_HAVE_BIGENDIAN
+#   define AV_RN(s, p)    AV_RB##s(p)
+#   define AV_WN(s, p, v) AV_WB##s(p, v)
+#else
+#   define AV_RN(s, p)    AV_RL##s(p)
+#   define AV_WN(s, p, v) AV_WL##s(p, v)
+#endif
+
+#endif /* HAVE_FAST_UNALIGNED */
+
+#ifndef AV_RN16
+#   define AV_RN16(p) AV_RN(16, p)
+#endif
+
+#ifndef AV_RN32
+#   define AV_RN32(p) AV_RN(32, p)
+#endif
+
+#ifndef AV_RN64
+#   define AV_RN64(p) AV_RN(64, p)
+#endif
+
+#ifndef AV_WN16
+#   define AV_WN16(p, v) AV_WN(16, p, v)
+#endif
+
+#ifndef AV_WN32
+#   define AV_WN32(p, v) AV_WN(32, p, v)
+#endif
+
+#ifndef AV_WN64
+#   define AV_WN64(p, v) AV_WN(64, p, v)
+#endif
+
+#if AV_HAVE_BIGENDIAN
+#   define AV_RB(s, p)    AV_RN##s(p)
+#   define AV_WB(s, p, v) AV_WN##s(p, v)
+#   define AV_RL(s, p)    av_bswap##s(AV_RN##s(p))
+#   define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
+#else
+#   define AV_RB(s, p)    av_bswap##s(AV_RN##s(p))
+#   define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
+#   define AV_RL(s, p)    AV_RN##s(p)
+#   define AV_WL(s, p, v) AV_WN##s(p, v)
+#endif
+
+#define AV_RB8(x)     (((const uint8_t*)(x))[0])
+#define AV_WB8(p, d)  do { ((uint8_t*)(p))[0] = (d); } while(0)
+
+#define AV_RL8(x)     AV_RB8(x)
+#define AV_WL8(p, d)  AV_WB8(p, d)
+
+#ifndef AV_RB16
+#   define AV_RB16(p)    AV_RB(16, p)
+#endif
+#ifndef AV_WB16
+#   define AV_WB16(p, v) AV_WB(16, p, v)
+#endif
+
+#ifndef AV_RL16
+#   define AV_RL16(p)    AV_RL(16, p)
+#endif
+#ifndef AV_WL16
+#   define AV_WL16(p, v) AV_WL(16, p, v)
+#endif
+
+#ifndef AV_RB32
+#   define AV_RB32(p)    AV_RB(32, p)
+#endif
+#ifndef AV_WB32
+#   define AV_WB32(p, v) AV_WB(32, p, v)
+#endif
+
+#ifndef AV_RL32
+#   define AV_RL32(p)    AV_RL(32, p)
+#endif
+#ifndef AV_WL32
+#   define AV_WL32(p, v) AV_WL(32, p, v)
+#endif
+
+#ifndef AV_RB64
+#   define AV_RB64(p)    AV_RB(64, p)
+#endif
+#ifndef AV_WB64
+#   define AV_WB64(p, v) AV_WB(64, p, v)
+#endif
+
+#ifndef AV_RL64
+#   define AV_RL64(p)    AV_RL(64, p)
+#endif
+#ifndef AV_WL64
+#   define AV_WL64(p, v) AV_WL(64, p, v)
+#endif
+
+#ifndef AV_RB24
+#   define AV_RB24(x)                           \
+    ((((const uint8_t*)(x))[0] << 16) |         \
+     (((const uint8_t*)(x))[1] <<  8) |         \
+      ((const uint8_t*)(x))[2])
+#endif
+#ifndef AV_WB24
+#   define AV_WB24(p, d) do {                   \
+        ((uint8_t*)(p))[2] = (d);               \
+        ((uint8_t*)(p))[1] = (d)>>8;            \
+        ((uint8_t*)(p))[0] = (d)>>16;           \
+    } while(0)
+#endif
+
+#ifndef AV_RL24
+#   define AV_RL24(x)                           \
+    ((((const uint8_t*)(x))[2] << 16) |         \
+     (((const uint8_t*)(x))[1] <<  8) |         \
+      ((const uint8_t*)(x))[0])
+#endif
+#ifndef AV_WL24
+#   define AV_WL24(p, d) do {                   \
+        ((uint8_t*)(p))[0] = (d);               \
+        ((uint8_t*)(p))[1] = (d)>>8;            \
+        ((uint8_t*)(p))[2] = (d)>>16;           \
+    } while(0)
+#endif
+
+#ifndef AV_RB48
+#   define AV_RB48(x)                                     \
+    (((uint64_t)((const uint8_t*)(x))[0] << 40) |         \
+     ((uint64_t)((const uint8_t*)(x))[1] << 32) |         \
+     ((uint64_t)((const uint8_t*)(x))[2] << 24) |         \
+     ((uint64_t)((const uint8_t*)(x))[3] << 16) |         \
+     ((uint64_t)((const uint8_t*)(x))[4] <<  8) |         \
+      (uint64_t)((const uint8_t*)(x))[5])
+#endif
+#ifndef AV_WB48
+#   define AV_WB48(p, darg) do {                \
+        uint64_t d = (darg);                    \
+        ((uint8_t*)(p))[5] = (d);               \
+        ((uint8_t*)(p))[4] = (d)>>8;            \
+        ((uint8_t*)(p))[3] = (d)>>16;           \
+        ((uint8_t*)(p))[2] = (d)>>24;           \
+        ((uint8_t*)(p))[1] = (d)>>32;           \
+        ((uint8_t*)(p))[0] = (d)>>40;           \
+    } while(0)
+#endif
+
+#ifndef AV_RL48
+#   define AV_RL48(x)                                     \
+    (((uint64_t)((const uint8_t*)(x))[5] << 40) |         \
+     ((uint64_t)((const uint8_t*)(x))[4] << 32) |         \
+     ((uint64_t)((const uint8_t*)(x))[3] << 24) |         \
+     ((uint64_t)((const uint8_t*)(x))[2] << 16) |         \
+     ((uint64_t)((const uint8_t*)(x))[1] <<  8) |         \
+      (uint64_t)((const uint8_t*)(x))[0])
+#endif
+#ifndef AV_WL48
+#   define AV_WL48(p, darg) do {                \
+        uint64_t d = (darg);                    \
+        ((uint8_t*)(p))[0] = (d);               \
+        ((uint8_t*)(p))[1] = (d)>>8;            \
+        ((uint8_t*)(p))[2] = (d)>>16;           \
+        ((uint8_t*)(p))[3] = (d)>>24;           \
+        ((uint8_t*)(p))[4] = (d)>>32;           \
+        ((uint8_t*)(p))[5] = (d)>>40;           \
+    } while(0)
+#endif
+
+/*
+ * The AV_[RW]NA macros access naturally aligned data
+ * in a type-safe way.
+ */
+
+#define AV_RNA(s, p)    (((const av_alias##s*)(p))->u##s)
+#define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
+
+#ifndef AV_RN16A
+#   define AV_RN16A(p) AV_RNA(16, p)
+#endif
+
+#ifndef AV_RN32A
+#   define AV_RN32A(p) AV_RNA(32, p)
+#endif
+
+#ifndef AV_RN64A
+#   define AV_RN64A(p) AV_RNA(64, p)
+#endif
+
+#ifndef AV_WN16A
+#   define AV_WN16A(p, v) AV_WNA(16, p, v)
+#endif
+
+#ifndef AV_WN32A
+#   define AV_WN32A(p, v) AV_WNA(32, p, v)
+#endif
+
+#ifndef AV_WN64A
+#   define AV_WN64A(p, v) AV_WNA(64, p, v)
+#endif
+
+#if AV_HAVE_BIGENDIAN
+#   define AV_RLA(s, p)    av_bswap##s(AV_RN##s##A(p))
+#   define AV_WLA(s, p, v) AV_WN##s##A(p, av_bswap##s(v))
+#   define AV_RBA(s, p)    AV_RN##s##A(p)
+#   define AV_WBA(s, p, v) AV_WN##s##A(p, v)
+#else
+#   define AV_RLA(s, p)    AV_RN##s##A(p)
+#   define AV_WLA(s, p, v) AV_WN##s##A(p, v)
+#   define AV_RBA(s, p)    av_bswap##s(AV_RN##s##A(p))
+#   define AV_WBA(s, p, v) AV_WN##s##A(p, av_bswap##s(v))
+#endif
+
+#ifndef AV_RL16A
+#   define AV_RL16A(p) AV_RLA(16, p)
+#endif
+#ifndef AV_WL16A
+#   define AV_WL16A(p, v) AV_WLA(16, p, v)
+#endif
+
+#ifndef AV_RB16A
+#   define AV_RB16A(p) AV_RBA(16, p)
+#endif
+#ifndef AV_WB16A
+#   define AV_WB16A(p, v) AV_WBA(16, p, v)
+#endif
+
+#ifndef AV_RL32A
+#   define AV_RL32A(p) AV_RLA(32, p)
+#endif
+#ifndef AV_WL32A
+#   define AV_WL32A(p, v) AV_WLA(32, p, v)
+#endif
+
+#ifndef AV_RB32A
+#   define AV_RB32A(p) AV_RBA(32, p)
+#endif
+#ifndef AV_WB32A
+#   define AV_WB32A(p, v) AV_WBA(32, p, v)
+#endif
+
+#ifndef AV_RL64A
+#   define AV_RL64A(p) AV_RLA(64, p)
+#endif
+#ifndef AV_WL64A
+#   define AV_WL64A(p, v) AV_WLA(64, p, v)
+#endif
+
+#ifndef AV_RB64A
+#   define AV_RB64A(p) AV_RBA(64, p)
+#endif
+#ifndef AV_WB64A
+#   define AV_WB64A(p, v) AV_WBA(64, p, v)
+#endif
+
+/*
+ * The AV_COPYxxU macros are suitable for copying data to/from unaligned
+ * memory locations.
+ */
+
+#define AV_COPYU(n, d, s) AV_WN##n(d, AV_RN##n(s));
+
+#ifndef AV_COPY16U
+#   define AV_COPY16U(d, s) AV_COPYU(16, d, s)
+#endif
+
+#ifndef AV_COPY32U
+#   define AV_COPY32U(d, s) AV_COPYU(32, d, s)
+#endif
+
+#ifndef AV_COPY64U
+#   define AV_COPY64U(d, s) AV_COPYU(64, d, s)
+#endif
+
+#ifndef AV_COPY128U
+#   define AV_COPY128U(d, s)                                    \
+    do {                                                        \
+        AV_COPY64U(d, s);                                       \
+        AV_COPY64U((char *)(d) + 8, (const char *)(s) + 8);     \
+    } while(0)
+#endif
+
+/* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
+ * naturally aligned.
+ */
+
+#define AV_COPY(n, d, s) \
+    (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
+
+#ifndef AV_COPY16
+#   define AV_COPY16(d, s) AV_COPY(16, d, s)
+#endif
+
+#ifndef AV_COPY32
+#   define AV_COPY32(d, s) AV_COPY(32, d, s)
+#endif
+
+#ifndef AV_COPY64
+#   define AV_COPY64(d, s) AV_COPY(64, d, s)
+#endif
+
+#ifndef AV_COPY128
+#   define AV_COPY128(d, s)                    \
+    do {                                       \
+        AV_COPY64(d, s);                       \
+        AV_COPY64((char*)(d)+8, (char*)(s)+8); \
+    } while(0)
+#endif
+
+#define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
+
+#ifndef AV_SWAP64
+#   define AV_SWAP64(a, b) AV_SWAP(64, a, b)
+#endif
+
+#define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
+
+#ifndef AV_ZERO16
+#   define AV_ZERO16(d) AV_ZERO(16, d)
+#endif
+
+#ifndef AV_ZERO32
+#   define AV_ZERO32(d) AV_ZERO(32, d)
+#endif
+
+#ifndef AV_ZERO64
+#   define AV_ZERO64(d) AV_ZERO(64, d)
+#endif
+
+#ifndef AV_ZERO128
+#   define AV_ZERO128(d)         \
+    do {                         \
+        AV_ZERO64(d);            \
+        AV_ZERO64((char*)(d)+8); \
+    } while(0)
+#endif
+
+#endif /* AVUTIL_INTREADWRITE_H */

ffmpeg/include/libavutil/lfg.h

@@ -0,0 +1,81 @@
+/*
+ * Lagged Fibonacci PRNG
+ * Copyright (c) 2008 Michael Niedermayer
+ *
+ * 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_LFG_H
+#define AVUTIL_LFG_H
+
+#include <stdint.h>
+
+/**
+ * Context structure for the Lagged Fibonacci PRNG.
+ * The exact layout, types and content of this struct may change and should
+ * not be accessed directly. Only its `sizeof()` is guaranteed to stay the same
+ * to allow easy instanciation.
+ */
+typedef struct AVLFG {
+    unsigned int state[64];
+    int index;
+} AVLFG;
+
+void av_lfg_init(AVLFG *c, unsigned int seed);
+
+/**
+ * Seed the state of the ALFG using binary data.
+ *
+ * @return 0 on success, negative value (AVERROR) on failure.
+ */
+int av_lfg_init_from_data(AVLFG *c, const uint8_t *data, unsigned int length);
+
+/**
+ * Get the next random unsigned 32-bit number using an ALFG.
+ *
+ * Please also consider a simple LCG like state= state*1664525+1013904223,
+ * it may be good enough and faster for your specific use case.
+ */
+static inline unsigned int av_lfg_get(AVLFG *c){
+    unsigned a = c->state[c->index & 63] = c->state[(c->index-24) & 63] + c->state[(c->index-55) & 63];
+    c->index += 1U;
+    return a;
+}
+
+/**
+ * Get the next random unsigned 32-bit number using a MLFG.
+ *
+ * Please also consider av_lfg_get() above, it is faster.
+ */
+static inline unsigned int av_mlfg_get(AVLFG *c){
+    unsigned int a= c->state[(c->index-55) & 63];
+    unsigned int b= c->state[(c->index-24) & 63];
+    a = c->state[c->index & 63] = 2*a*b+a+b;
+    c->index += 1U;
+    return a;
+}
+
+/**
+ * Get the next two numbers generated by a Box-Muller Gaussian
+ * generator using the random numbers issued by lfg.
+ *
+ * @param lfg pointer to the contex structure
+ * @param out array where the two generated numbers are placed
+ */
+void av_bmg_get(AVLFG *lfg, double out[2]);
+
+#endif /* AVUTIL_LFG_H */

ffmpeg/include/libavutil/log.h

@@ -0,0 +1,416 @@
+/*
+ * 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_LOG_H
+#define AVUTIL_LOG_H
+
+#include <stdarg.h>
+#include "attributes.h"
+#include "version.h"
+
+typedef enum {
+    AV_CLASS_CATEGORY_NA = 0,
+    AV_CLASS_CATEGORY_INPUT,
+    AV_CLASS_CATEGORY_OUTPUT,
+    AV_CLASS_CATEGORY_MUXER,
+    AV_CLASS_CATEGORY_DEMUXER,
+    AV_CLASS_CATEGORY_ENCODER,
+    AV_CLASS_CATEGORY_DECODER,
+    AV_CLASS_CATEGORY_FILTER,
+    AV_CLASS_CATEGORY_BITSTREAM_FILTER,
+    AV_CLASS_CATEGORY_SWSCALER,
+    AV_CLASS_CATEGORY_SWRESAMPLER,
+    AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT = 40,
+    AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
+    AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
+    AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT,
+    AV_CLASS_CATEGORY_DEVICE_OUTPUT,
+    AV_CLASS_CATEGORY_DEVICE_INPUT,
+    AV_CLASS_CATEGORY_NB  ///< not part of ABI/API
+}AVClassCategory;
+
+enum AVClassStateFlags {
+    /**
+     * Object initialization has finished and it is now in the 'runtime' stage.
+     * This affects e.g. what options can be set on the object (only
+     * AV_OPT_FLAG_RUNTIME_PARAM options can be set on initialized objects).
+     */
+    AV_CLASS_STATE_INITIALIZED         = (1 << 0),
+};
+
+#define AV_IS_INPUT_DEVICE(category) \
+    (((category) == AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT) || \
+     ((category) == AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT) || \
+     ((category) == AV_CLASS_CATEGORY_DEVICE_INPUT))
+
+#define AV_IS_OUTPUT_DEVICE(category) \
+    (((category) == AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT) || \
+     ((category) == AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT) || \
+     ((category) == AV_CLASS_CATEGORY_DEVICE_OUTPUT))
+
+struct AVOptionRanges;
+
+/**
+ * Describe the class of an AVClass context structure. That is an
+ * arbitrary struct of which the first field is a pointer to an
+ * AVClass struct (e.g. AVCodecContext, AVFormatContext etc.).
+ */
+typedef struct AVClass {
+    /**
+     * The name of the class; usually it is the same name as the
+     * context structure type to which the AVClass is associated.
+     */
+    const char* class_name;
+
+    /**
+     * A pointer to a function which returns the name of a context
+     * instance ctx associated with the class.
+     */
+    const char* (*item_name)(void* ctx);
+
+    /**
+     * An array of options for the structure or NULL.
+     * When non-NULL, the array must be terminated by an option with a NULL
+     * name.
+     *
+     * @see av_set_default_options()
+     */
+    const struct AVOption *option;
+
+    /**
+     * LIBAVUTIL_VERSION with which this structure was created.
+     * This is used to allow fields to be added to AVClass without requiring
+     * major version bumps everywhere.
+     */
+
+    int version;
+
+    /**
+     * Offset in the structure where the log level offset is stored. The log
+     * level offset is an int added to the log level for logging with this
+     * object as the context.
+     *
+     * 0 means there is no such variable.
+     */
+    int log_level_offset_offset;
+
+    /**
+     * Offset in the structure where a pointer to the parent context for
+     * logging is stored. For example a decoder could pass its AVCodecContext
+     * to eval as such a parent context, which an ::av_log() implementation
+     * could then leverage to display the parent context.
+     *
+     * When the pointer is NULL, or this offset is zero, the object is assumed
+     * to have no parent.
+     */
+    int parent_log_context_offset;
+
+    /**
+     * Category used for visualization (like color).
+     *
+     * Only used when ::get_category() is NULL. Use this field when all
+     * instances of this class have the same category, use ::get_category()
+     * otherwise.
+     */
+    AVClassCategory category;
+
+    /**
+     * Callback to return the instance category. Use this callback when
+     * different instances of this class may have different categories,
+     * ::category otherwise.
+     */
+    AVClassCategory (*get_category)(void* ctx);
+
+    /**
+     * Callback to return the supported/allowed ranges.
+     */
+    int (*query_ranges)(struct AVOptionRanges **, void *obj, const char *key, int flags);
+
+    /**
+     * Return next AVOptions-enabled child or NULL
+     */
+    void* (*child_next)(void *obj, void *prev);
+
+    /**
+     * Iterate over the AVClasses corresponding to potential AVOptions-enabled
+     * children.
+     *
+     * @param iter pointer to opaque iteration state. The caller must initialize
+     *             *iter to NULL before the first call.
+     * @return AVClass for the next AVOptions-enabled child or NULL if there are
+     *         no more such children.
+     *
+     * @note The difference between ::child_next() and ::child_class_iterate()
+     *       is that ::child_next() iterates over _actual_ children of an
+     *       _existing_ object instance, while ::child_class_iterate() iterates
+     *       over the classes of all _potential_ children of any possible
+     *       instance of this class.
+     */
+    const struct AVClass* (*child_class_iterate)(void **iter);
+
+    /**
+     * When non-zero, offset in the object to an unsigned int holding object
+     * state flags, a combination of AVClassStateFlags values. The flags are
+     * updated by the object to signal its state to the generic code.
+     *
+     * Added in version 59.41.100.
+     */
+    int state_flags_offset;
+} AVClass;
+
+/**
+ * @addtogroup lavu_log
+ *
+ * @{
+ *
+ * @defgroup lavu_log_constants Logging Constants
+ *
+ * @{
+ */
+
+/**
+ * Print no output.
+ */
+#define AV_LOG_QUIET    -8
+
+/**
+ * Something went really wrong and we will crash now.
+ */
+#define AV_LOG_PANIC     0
+
+/**
+ * Something went wrong and recovery is not possible.
+ * For example, no header was found for a format which depends
+ * on headers or an illegal combination of parameters is used.
+ */
+#define AV_LOG_FATAL     8
+
+/**
+ * Something went wrong and cannot losslessly be recovered.
+ * However, not all future data is affected.
+ */
+#define AV_LOG_ERROR    16
+
+/**
+ * Something somehow does not look correct. This may or may not
+ * lead to problems. An example would be the use of '-vstrict -2'.
+ */
+#define AV_LOG_WARNING  24
+
+/**
+ * Standard information.
+ */
+#define AV_LOG_INFO     32
+
+/**
+ * Detailed information.
+ */
+#define AV_LOG_VERBOSE  40
+
+/**
+ * Stuff which is only useful for libav* developers.
+ */
+#define AV_LOG_DEBUG    48
+
+/**
+ * Extremely verbose debugging, useful for libav* development.
+ */
+#define AV_LOG_TRACE    56
+
+#define AV_LOG_MAX_OFFSET (AV_LOG_TRACE - AV_LOG_QUIET)
+
+/**
+ * @}
+ */
+
+/**
+ * Sets additional colors for extended debugging sessions.
+ * @code
+   av_log(ctx, AV_LOG_DEBUG|AV_LOG_C(134), "Message in purple\n");
+   @endcode
+ * Requires 256color terminal support. Uses outside debugging is not
+ * recommended.
+ */
+#define AV_LOG_C(x) ((x) << 8)
+
+/**
+ * Send the specified message to the log if the level is less than or equal
+ * to the current av_log_level. By default, all logging messages are sent to
+ * stderr. This behavior can be altered by setting a different logging callback
+ * function.
+ * @see av_log_set_callback
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ *        pointer to an AVClass struct or NULL if general log.
+ * @param level The importance level of the message expressed using a @ref
+ *        lavu_log_constants "Logging Constant".
+ * @param fmt The format string (printf-compatible) that specifies how
+ *        subsequent arguments are converted to output.
+ */
+void av_log(void *avcl, int level, const char *fmt, ...) av_printf_format(3, 4);
+
+/**
+ * Send the specified message to the log once with the initial_level and then with
+ * the subsequent_level. By default, all logging messages are sent to
+ * stderr. This behavior can be altered by setting a different logging callback
+ * function.
+ * @see av_log
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ *        pointer to an AVClass struct or NULL if general log.
+ * @param initial_level importance level of the message expressed using a @ref
+ *        lavu_log_constants "Logging Constant" for the first occurance.
+ * @param subsequent_level importance level of the message expressed using a @ref
+ *        lavu_log_constants "Logging Constant" after the first occurance.
+ * @param fmt The format string (printf-compatible) that specifies how
+ *        subsequent arguments are converted to output.
+ * @param state a variable to keep trak of if a message has already been printed
+ *        this must be initialized to 0 before the first use. The same state
+ *        must not be accessed by 2 Threads simultaneously.
+ */
+void av_log_once(void* avcl, int initial_level, int subsequent_level, int *state, const char *fmt, ...) av_printf_format(5, 6);
+
+
+/**
+ * Send the specified message to the log if the level is less than or equal
+ * to the current av_log_level. By default, all logging messages are sent to
+ * stderr. This behavior can be altered by setting a different logging callback
+ * function.
+ * @see av_log_set_callback
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ *        pointer to an AVClass struct.
+ * @param level The importance level of the message expressed using a @ref
+ *        lavu_log_constants "Logging Constant".
+ * @param fmt The format string (printf-compatible) that specifies how
+ *        subsequent arguments are converted to output.
+ * @param vl The arguments referenced by the format string.
+ */
+void av_vlog(void *avcl, int level, const char *fmt, va_list vl);
+
+/**
+ * Get the current log level
+ *
+ * @see lavu_log_constants
+ *
+ * @return Current log level
+ */
+int av_log_get_level(void);
+
+/**
+ * Set the log level
+ *
+ * @see lavu_log_constants
+ *
+ * @param level Logging level
+ */
+void av_log_set_level(int level);
+
+/**
+ * Set the logging callback
+ *
+ * @note The callback must be thread safe, even if the application does not use
+ *       threads itself as some codecs are multithreaded.
+ *
+ * @see av_log_default_callback
+ *
+ * @param callback A logging function with a compatible signature.
+ */
+void av_log_set_callback(void (*callback)(void*, int, const char*, va_list));
+
+/**
+ * Default logging callback
+ *
+ * It prints the message to stderr, optionally colorizing it.
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ *        pointer to an AVClass struct.
+ * @param level The importance level of the message expressed using a @ref
+ *        lavu_log_constants "Logging Constant".
+ * @param fmt The format string (printf-compatible) that specifies how
+ *        subsequent arguments are converted to output.
+ * @param vl The arguments referenced by the format string.
+ */
+void av_log_default_callback(void *avcl, int level, const char *fmt,
+                             va_list vl);
+
+/**
+ * Return the context name
+ *
+ * @param  ctx The AVClass context
+ *
+ * @return The AVClass class_name
+ */
+const char* av_default_item_name(void* ctx);
+AVClassCategory av_default_get_category(void *ptr);
+
+/**
+ * Format a line of log the same way as the default callback.
+ * @param line          buffer to receive the formatted line
+ * @param line_size     size of the buffer
+ * @param print_prefix  used to store whether the prefix must be printed;
+ *                      must point to a persistent integer initially set to 1
+ */
+void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl,
+                        char *line, int line_size, int *print_prefix);
+
+/**
+ * Format a line of log the same way as the default callback.
+ * @param line          buffer to receive the formatted line;
+ *                      may be NULL if line_size is 0
+ * @param line_size     size of the buffer; at most line_size-1 characters will
+ *                      be written to the buffer, plus one null terminator
+ * @param print_prefix  used to store whether the prefix must be printed;
+ *                      must point to a persistent integer initially set to 1
+ * @return Returns a negative value if an error occurred, otherwise returns
+ *         the number of characters that would have been written for a
+ *         sufficiently large buffer, not including the terminating null
+ *         character. If the return value is not less than line_size, it means
+ *         that the log message was truncated to fit the buffer.
+ */
+int av_log_format_line2(void *ptr, int level, const char *fmt, va_list vl,
+                        char *line, int line_size, int *print_prefix);
+
+/**
+ * Skip repeated messages, this requires the user app to use av_log() instead of
+ * (f)printf as the 2 would otherwise interfere and lead to
+ * "Last message repeated x times" messages below (f)printf messages with some
+ * bad luck.
+ * Also to receive the last, "last repeated" line if any, the user app must
+ * call av_log(NULL, AV_LOG_QUIET, "%s", ""); at the end
+ */
+#define AV_LOG_SKIP_REPEATED 1
+
+/**
+ * Include the log severity in messages originating from codecs.
+ *
+ * Results in messages such as:
+ * [rawvideo @ 0xDEADBEEF] [error] encode did not produce valid pts
+ */
+#define AV_LOG_PRINT_LEVEL 2
+
+void av_log_set_flags(int arg);
+int av_log_get_flags(void);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_LOG_H */

ffmpeg/include/libavutil/lzo.h

@@ -0,0 +1,66 @@
+/*
+ * LZO 1x decompression
+ * copyright (c) 2006 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_LZO_H
+#define AVUTIL_LZO_H
+
+/**
+ * @defgroup lavu_lzo LZO
+ * @ingroup lavu_crypto
+ *
+ * @{
+ */
+
+#include <stdint.h>
+
+/** @name Error flags returned by av_lzo1x_decode
+ * @{ */
+/// end of the input buffer reached before decoding finished
+#define AV_LZO_INPUT_DEPLETED  1
+/// decoded data did not fit into output buffer
+#define AV_LZO_OUTPUT_FULL     2
+/// a reference to previously decoded data was wrong
+#define AV_LZO_INVALID_BACKPTR 4
+/// a non-specific error in the compressed bitstream
+#define AV_LZO_ERROR           8
+/** @} */
+
+#define AV_LZO_INPUT_PADDING   8
+#define AV_LZO_OUTPUT_PADDING 12
+
+/**
+ * @brief Decodes LZO 1x compressed data.
+ * @param out output buffer
+ * @param outlen size of output buffer, number of bytes left are returned here
+ * @param in input buffer
+ * @param inlen size of input buffer, number of bytes left are returned here
+ * @return 0 on success, otherwise a combination of the error flags above
+ *
+ * Make sure all buffers are appropriately padded, in must provide
+ * AV_LZO_INPUT_PADDING, out must provide AV_LZO_OUTPUT_PADDING additional bytes.
+ */
+int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_LZO_H */

ffmpeg/include/libavutil/macros.h

@@ -0,0 +1,80 @@
+/*
+ * 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
+ * Utility Preprocessor macros
+ */
+
+#ifndef AVUTIL_MACROS_H
+#define AVUTIL_MACROS_H
+
+#include "libavutil/avconfig.h"
+
+#if AV_HAVE_BIGENDIAN
+#   define AV_NE(be, le) (be)
+#else
+#   define AV_NE(be, le) (le)
+#endif
+
+/**
+ * Comparator.
+ * For two numerical expressions x and y, gives 1 if x > y, -1 if x < y, and 0
+ * if x == y. This is useful for instance in a qsort comparator callback.
+ * Furthermore, compilers are able to optimize this to branchless code, and
+ * there is no risk of overflow with signed types.
+ * As with many macros, this evaluates its argument multiple times, it thus
+ * must not have a side-effect.
+ */
+#define FFDIFFSIGN(x,y) (((x)>(y)) - ((x)<(y)))
+
+#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
+#define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
+#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
+#define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
+
+#define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
+#define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
+
+#define MKTAG(a,b,c,d)   ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))
+#define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))
+
+/**
+ * @addtogroup preproc_misc Preprocessor String Macros
+ *
+ * String manipulation macros
+ *
+ * @{
+ */
+
+#define AV_STRINGIFY(s)         AV_TOSTRING(s)
+#define AV_TOSTRING(s) #s
+
+#define AV_GLUE(a, b) a ## b
+#define AV_JOIN(a, b) AV_GLUE(a, b)
+
+/**
+ * @}
+ */
+
+#define AV_PRAGMA(s) _Pragma(#s)
+
+#define FFALIGN(x, a) (((x)+(a)-1)&~((a)-1))
+
+#endif /* AVUTIL_MACROS_H */

ffmpeg/include/libavutil/mastering_display_metadata.h

@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2016 Neil Birkbeck <neil.birkbeck@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_MASTERING_DISPLAY_METADATA_H
+#define AVUTIL_MASTERING_DISPLAY_METADATA_H
+
+#include "frame.h"
+#include "rational.h"
+
+
+/**
+ * Mastering display metadata capable of representing the color volume of
+ * the display used to master the content (SMPTE 2086:2014).
+ *
+ * To be used as payload of a AVFrameSideData or AVPacketSideData with the
+ * appropriate type.
+ *
+ * @note The struct should be allocated with av_mastering_display_metadata_alloc()
+ *       and its size is not a part of the public ABI.
+ */
+typedef struct AVMasteringDisplayMetadata {
+    /**
+     * CIE 1931 xy chromaticity coords of color primaries (r, g, b order).
+     */
+    AVRational display_primaries[3][2];
+
+    /**
+     * CIE 1931 xy chromaticity coords of white point.
+     */
+    AVRational white_point[2];
+
+    /**
+     * Min luminance of mastering display (cd/m^2).
+     */
+    AVRational min_luminance;
+
+    /**
+     * Max luminance of mastering display (cd/m^2).
+     */
+    AVRational max_luminance;
+
+    /**
+     * Flag indicating whether the display primaries (and white point) are set.
+     */
+    int has_primaries;
+
+    /**
+     * Flag indicating whether the luminance (min_ and max_) have been set.
+     */
+    int has_luminance;
+
+} AVMasteringDisplayMetadata;
+
+/**
+ * Allocate an AVMasteringDisplayMetadata structure and set its fields to
+ * default values. The resulting struct can be freed using av_freep().
+ *
+ * @return An AVMasteringDisplayMetadata filled with default values or NULL
+ *         on failure.
+ */
+AVMasteringDisplayMetadata *av_mastering_display_metadata_alloc(void);
+
+/**
+ * Allocate an AVMasteringDisplayMetadata structure and set its fields to
+ * default values. The resulting struct can be freed using av_freep().
+ *
+ * @return An AVMasteringDisplayMetadata filled with default values or NULL
+ *         on failure.
+ */
+AVMasteringDisplayMetadata *av_mastering_display_metadata_alloc_size(size_t *size);
+
+/**
+ * Allocate a complete AVMasteringDisplayMetadata and add it to the frame.
+ *
+ * @param frame The frame which side data is added to.
+ *
+ * @return The AVMasteringDisplayMetadata structure to be filled by caller.
+ */
+AVMasteringDisplayMetadata *av_mastering_display_metadata_create_side_data(AVFrame *frame);
+
+/**
+ * Content light level needed by to transmit HDR over HDMI (CTA-861.3).
+ *
+ * To be used as payload of a AVFrameSideData or AVPacketSideData with the
+ * appropriate type.
+ *
+ * @note The struct should be allocated with av_content_light_metadata_alloc()
+ *       and its size is not a part of the public ABI.
+ */
+typedef struct AVContentLightMetadata {
+    /**
+     * Max content light level (cd/m^2).
+     */
+    unsigned MaxCLL;
+
+    /**
+     * Max average light level per frame (cd/m^2).
+     */
+    unsigned MaxFALL;
+} AVContentLightMetadata;
+
+/**
+ * Allocate an AVContentLightMetadata structure and set its fields to
+ * default values. The resulting struct can be freed using av_freep().
+ *
+ * @return An AVContentLightMetadata filled with default values or NULL
+ *         on failure.
+ */
+AVContentLightMetadata *av_content_light_metadata_alloc(size_t *size);
+
+/**
+ * Allocate a complete AVContentLightMetadata and add it to the frame.
+ *
+ * @param frame The frame which side data is added to.
+ *
+ * @return The AVContentLightMetadata structure to be filled by caller.
+ */
+AVContentLightMetadata *av_content_light_metadata_create_side_data(AVFrame *frame);
+
+#endif /* AVUTIL_MASTERING_DISPLAY_METADATA_H */

ffmpeg/include/libavutil/spherical.h

@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2016 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_spherical
+ * Spherical video
+ */
+
+#ifndef AVUTIL_SPHERICAL_H
+#define AVUTIL_SPHERICAL_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_video_spherical Spherical video mapping
+ * @ingroup lavu_video
+ *
+ * A spherical video file contains surfaces that need to be mapped onto a
+ * sphere. Depending on how the frame was converted, a different distortion
+ * transformation or surface recomposition function needs to be applied before
+ * the video should be mapped and displayed.
+ * @{
+ */
+
+/**
+ * Projection of the video surface(s) on a sphere.
+ */
+enum AVSphericalProjection {
+    /**
+     * Video represents a sphere mapped on a flat surface using
+     * equirectangular projection.
+     */
+    AV_SPHERICAL_EQUIRECTANGULAR,
+
+    /**
+     * Video frame is split into 6 faces of a cube, and arranged on a
+     * 3x2 layout. Faces are oriented upwards for the front, left, right,
+     * and back faces. The up face is oriented so the top of the face is
+     * forwards and the down face is oriented so the top of the face is
+     * to the back.
+     */
+    AV_SPHERICAL_CUBEMAP,
+
+    /**
+     * Video represents a portion of a sphere mapped on a flat surface
+     * using equirectangular projection. The @ref bounding fields indicate
+     * the position of the current video in a larger surface.
+     */
+    AV_SPHERICAL_EQUIRECTANGULAR_TILE,
+
+    /**
+     * Video frame displays as a 180 degree equirectangular projection.
+     */
+    AV_SPHERICAL_HALF_EQUIRECTANGULAR,
+
+    /**
+     * Video frame displays on a flat, rectangular 2D surface.
+     */
+    AV_SPHERICAL_RECTILINEAR,
+
+    /**
+     * Fisheye projection (Apple).
+     * See: https://developer.apple.com/documentation/coremedia/cmprojectiontype/fisheye
+     */
+    AV_SPHERICAL_FISHEYE,
+};
+
+/**
+ * This structure describes how to handle spherical videos, outlining
+ * information about projection, initial layout, and any other view modifier.
+ *
+ * @note The struct must be allocated with av_spherical_alloc() and
+ *       its size is not a part of the public ABI.
+ */
+typedef struct AVSphericalMapping {
+    /**
+     * Projection type.
+     */
+    enum AVSphericalProjection projection;
+
+    /**
+     * @name Initial orientation
+     * @{
+     * There fields describe additional rotations applied to the sphere after
+     * the video frame is mapped onto it. The sphere is rotated around the
+     * viewer, who remains stationary. The order of transformation is always
+     * yaw, followed by pitch, and finally by roll.
+     *
+     * The coordinate system matches the one defined in OpenGL, where the
+     * forward vector (z) is coming out of screen, and it is equivalent to
+     * a rotation matrix of R = r_y(yaw) * r_x(pitch) * r_z(roll).
+     *
+     * A positive yaw rotates the portion of the sphere in front of the viewer
+     * toward their right. A positive pitch rotates the portion of the sphere
+     * in front of the viewer upwards. A positive roll tilts the portion of
+     * the sphere in front of the viewer to the viewer's right.
+     *
+     * These values are exported as 16.16 fixed point.
+     *
+     * See this equirectangular projection as example:
+     *
+     * @code{.unparsed}
+     *                   Yaw
+     *     -180           0           180
+     *   90 +-------------+-------------+  180
+     *      |             |             |                  up
+     * P    |             |             |                 y|    forward
+     * i    |             ^             |                  |   /z
+     * t  0 +-------------X-------------+    0 Roll        |  /
+     * c    |             |             |                  | /
+     * h    |             |             |                 0|/_____right
+     *      |             |             |                        x
+     *  -90 +-------------+-------------+ -180
+     *
+     * X - the default camera center
+     * ^ - the default up vector
+     * @endcode
+     */
+    int32_t yaw;   ///< Rotation around the up vector [-180, 180].
+    int32_t pitch; ///< Rotation around the right vector [-90, 90].
+    int32_t roll;  ///< Rotation around the forward vector [-180, 180].
+    /**
+     * @}
+     */
+
+    /**
+     * @name Bounding rectangle
+     * @anchor bounding
+     * @{
+     * These fields indicate the location of the current tile, and where
+     * it should be mapped relative to the original surface. They are
+     * exported as 0.32 fixed point, and can be converted to classic
+     * pixel values with av_spherical_bounds().
+     *
+     * @code{.unparsed}
+     *      +----------------+----------+
+     *      |                |bound_top |
+     *      |            +--------+     |
+     *      | bound_left |tile    |     |
+     *      +<---------->|        |<--->+bound_right
+     *      |            +--------+     |
+     *      |                |          |
+     *      |    bound_bottom|          |
+     *      +----------------+----------+
+     * @endcode
+     *
+     * If needed, the original video surface dimensions can be derived
+     * by adding the current stream or frame size to the related bounds,
+     * like in the following example:
+     *
+     * @code{c}
+     *     original_width  = tile->width  + bound_left + bound_right;
+     *     original_height = tile->height + bound_top  + bound_bottom;
+     * @endcode
+     *
+     * @note These values are valid only for the tiled equirectangular
+     *       projection type (@ref AV_SPHERICAL_EQUIRECTANGULAR_TILE),
+     *       and should be ignored in all other cases.
+     */
+    uint32_t bound_left;   ///< Distance from the left edge
+    uint32_t bound_top;    ///< Distance from the top edge
+    uint32_t bound_right;  ///< Distance from the right edge
+    uint32_t bound_bottom; ///< Distance from the bottom edge
+    /**
+     * @}
+     */
+
+    /**
+     * Number of pixels to pad from the edge of each cube face.
+     *
+     * @note This value is valid for only for the cubemap projection type
+     *       (@ref AV_SPHERICAL_CUBEMAP), and should be ignored in all other
+     *       cases.
+     */
+    uint32_t padding;
+} AVSphericalMapping;
+
+/**
+ * Allocate a AVSphericalVideo structure and initialize its fields to default
+ * values.
+ *
+ * @return the newly allocated struct or NULL on failure
+ */
+AVSphericalMapping *av_spherical_alloc(size_t *size);
+
+/**
+ * Convert the @ref bounding fields from an AVSphericalVideo
+ * from 0.32 fixed point to pixels.
+ *
+ * @param map    The AVSphericalVideo map to read bound values from.
+ * @param width  Width of the current frame or stream.
+ * @param height Height of the current frame or stream.
+ * @param left   Pixels from the left edge.
+ * @param top    Pixels from the top edge.
+ * @param right  Pixels from the right edge.
+ * @param bottom Pixels from the bottom edge.
+ */
+void av_spherical_tile_bounds(const AVSphericalMapping *map,
+                              size_t width, size_t height,
+                              size_t *left, size_t *top,
+                              size_t *right, size_t *bottom);
+
+/**
+ * Provide a human-readable name of a given AVSphericalProjection.
+ *
+ * @param projection The input AVSphericalProjection.
+ *
+ * @return The name of the AVSphericalProjection, or "unknown".
+ */
+const char *av_spherical_projection_name(enum AVSphericalProjection projection);
+
+/**
+ * Get the AVSphericalProjection form a human-readable name.
+ *
+ * @param name The input string.
+ *
+ * @return The AVSphericalProjection value, or -1 if not found.
+ */
+int av_spherical_from_name(const char *name);
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_SPHERICAL_H */

ffmpeg/include/libavutil/stereo3d.h

@@ -0,0 +1,325 @@
+/*
+ * Copyright (c) 2013 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_stereo3d
+ * Stereoscopic video
+ */
+
+#ifndef AVUTIL_STEREO3D_H
+#define AVUTIL_STEREO3D_H
+
+#include <stdint.h>
+
+#include "frame.h"
+
+/**
+ * @defgroup lavu_video_stereo3d Stereo3D types and functions
+ * @ingroup lavu_video
+ *
+ * A stereoscopic video file consists in multiple views embedded in a single
+ * frame, usually describing two views of a scene. This file describes all
+ * possible codec-independent view arrangements.
+ *
+ * @{
+ */
+
+/**
+ * List of possible 3D Types
+ */
+enum AVStereo3DType {
+    /**
+     * Video is not stereoscopic (and metadata has to be there).
+     */
+    AV_STEREO3D_2D,
+
+    /**
+     * Views are next to each other.
+     *
+     * @code{.unparsed}
+     *    LLLLRRRR
+     *    LLLLRRRR
+     *    LLLLRRRR
+     *    ...
+     * @endcode
+     */
+    AV_STEREO3D_SIDEBYSIDE,
+
+    /**
+     * Views are on top of each other.
+     *
+     * @code{.unparsed}
+     *    LLLLLLLL
+     *    LLLLLLLL
+     *    RRRRRRRR
+     *    RRRRRRRR
+     * @endcode
+     */
+    AV_STEREO3D_TOPBOTTOM,
+
+    /**
+     * Views are alternated temporally.
+     *
+     * @code{.unparsed}
+     *     frame0   frame1   frame2   ...
+     *    LLLLLLLL RRRRRRRR LLLLLLLL
+     *    LLLLLLLL RRRRRRRR LLLLLLLL
+     *    LLLLLLLL RRRRRRRR LLLLLLLL
+     *    ...      ...      ...
+     * @endcode
+     */
+    AV_STEREO3D_FRAMESEQUENCE,
+
+    /**
+     * Views are packed in a checkerboard-like structure per pixel.
+     *
+     * @code{.unparsed}
+     *    LRLRLRLR
+     *    RLRLRLRL
+     *    LRLRLRLR
+     *    ...
+     * @endcode
+     */
+    AV_STEREO3D_CHECKERBOARD,
+
+    /**
+     * Views are next to each other, but when upscaling
+     * apply a checkerboard pattern.
+     *
+     * @code{.unparsed}
+     *     LLLLRRRR          L L L L    R R R R
+     *     LLLLRRRR    =>     L L L L  R R R R
+     *     LLLLRRRR          L L L L    R R R R
+     *     LLLLRRRR           L L L L  R R R R
+     * @endcode
+     */
+    AV_STEREO3D_SIDEBYSIDE_QUINCUNX,
+
+    /**
+     * Views are packed per line, as if interlaced.
+     *
+     * @code{.unparsed}
+     *    LLLLLLLL
+     *    RRRRRRRR
+     *    LLLLLLLL
+     *    ...
+     * @endcode
+     */
+    AV_STEREO3D_LINES,
+
+    /**
+     * Views are packed per column.
+     *
+     * @code{.unparsed}
+     *    LRLRLRLR
+     *    LRLRLRLR
+     *    LRLRLRLR
+     *    ...
+     * @endcode
+     */
+    AV_STEREO3D_COLUMNS,
+
+    /**
+     * Video is stereoscopic but the packing is unspecified.
+     */
+    AV_STEREO3D_UNSPEC,
+};
+
+/**
+ * List of possible view types.
+ */
+enum AVStereo3DView {
+    /**
+     * Frame contains two packed views.
+     */
+    AV_STEREO3D_VIEW_PACKED,
+
+    /**
+     * Frame contains only the left view.
+     */
+    AV_STEREO3D_VIEW_LEFT,
+
+    /**
+     * Frame contains only the right view.
+     */
+    AV_STEREO3D_VIEW_RIGHT,
+
+    /**
+     * Content is unspecified.
+     */
+    AV_STEREO3D_VIEW_UNSPEC,
+};
+
+/**
+ * List of possible primary eyes.
+ */
+enum AVStereo3DPrimaryEye {
+    /**
+     * Neither eye.
+     */
+    AV_PRIMARY_EYE_NONE,
+
+    /**
+     * Left eye.
+     */
+    AV_PRIMARY_EYE_LEFT,
+
+    /**
+     * Right eye
+     */
+    AV_PRIMARY_EYE_RIGHT,
+};
+
+/**
+ * Inverted views, Right/Bottom represents the left view.
+ */
+#define AV_STEREO3D_FLAG_INVERT     (1 << 0)
+
+/**
+ * Stereo 3D type: this structure describes how two videos are packed
+ * within a single video surface, with additional information as needed.
+ *
+ * @note The struct must be allocated with av_stereo3d_alloc() and
+ *       its size is not a part of the public ABI.
+ */
+typedef struct AVStereo3D {
+    /**
+     * How views are packed within the video.
+     */
+    enum AVStereo3DType type;
+
+    /**
+     * Additional information about the frame packing.
+     */
+    int flags;
+
+    /**
+     * Determines which views are packed.
+     */
+    enum AVStereo3DView view;
+
+    /**
+     * Which eye is the primary eye when rendering in 2D.
+     */
+    enum AVStereo3DPrimaryEye primary_eye;
+
+    /**
+     * The distance between the centres of the lenses of the camera system,
+     * in micrometers. Zero if unset.
+     */
+    uint32_t baseline;
+
+    /**
+     * Relative shift of the left and right images, which changes the zero parallax plane.
+     * Range is -1.0 to 1.0. Zero if unset.
+     */
+    AVRational horizontal_disparity_adjustment;
+
+    /**
+     * Horizontal field of view, in degrees. Zero if unset.
+     */
+    AVRational horizontal_field_of_view;
+} AVStereo3D;
+
+/**
+ * Allocate an AVStereo3D structure and set its fields to default values.
+ * The resulting struct can be freed using av_freep().
+ *
+ * @return An AVStereo3D filled with default values or NULL on failure.
+ */
+AVStereo3D *av_stereo3d_alloc(void);
+
+/**
+ * Allocate an AVStereo3D structure and set its fields to default values.
+ * The resulting struct can be freed using av_freep().
+ *
+ * @return An AVStereo3D filled with default values or NULL on failure.
+ */
+AVStereo3D *av_stereo3d_alloc_size(size_t *size);
+
+/**
+ * Allocate a complete AVFrameSideData and add it to the frame.
+ *
+ * @param frame The frame which side data is added to.
+ *
+ * @return The AVStereo3D structure to be filled by caller.
+ */
+AVStereo3D *av_stereo3d_create_side_data(AVFrame *frame);
+
+/**
+ * Provide a human-readable name of a given stereo3d type.
+ *
+ * @param type The input stereo3d type value.
+ *
+ * @return The name of the stereo3d value, or "unknown".
+ */
+const char *av_stereo3d_type_name(unsigned int type);
+
+/**
+ * Get the AVStereo3DType form a human-readable name.
+ *
+ * @param name The input string.
+ *
+ * @return The AVStereo3DType value, or -1 if not found.
+ */
+int av_stereo3d_from_name(const char *name);
+
+/**
+ * Provide a human-readable name of a given stereo3d view.
+ *
+ * @param type The input stereo3d view value.
+ *
+ * @return The name of the stereo3d view value, or "unknown".
+ */
+const char *av_stereo3d_view_name(unsigned int view);
+
+/**
+ * Get the AVStereo3DView form a human-readable name.
+ *
+ * @param name The input string.
+ *
+ * @return The AVStereo3DView value, or -1 if not found.
+ */
+int av_stereo3d_view_from_name(const char *name);
+
+/**
+ * Provide a human-readable name of a given stereo3d primary eye.
+ *
+ * @param type The input stereo3d primary eye value.
+ *
+ * @return The name of the stereo3d primary eye value, or "unknown".
+ */
+const char *av_stereo3d_primary_eye_name(unsigned int eye);
+
+/**
+ * Get the AVStereo3DPrimaryEye form a human-readable name.
+ *
+ * @param name The input string.
+ *
+ * @return The AVStereo3DPrimaryEye value, or -1 if not found.
+ */
+int av_stereo3d_primary_eye_from_name(const char *name);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_STEREO3D_H */

ffmpeg/include/libavutil/tea.h

@@ -0,0 +1,71 @@
+/*
+ * A 32-bit implementation of the TEA algorithm
+ * Copyright (c) 2015 Vesselin Bontchev
+ *
+ * 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_TEA_H
+#define AVUTIL_TEA_H
+
+#include <stdint.h>
+
+/**
+ * @file
+ * @brief Public header for libavutil TEA algorithm
+ * @defgroup lavu_tea TEA
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+extern const int av_tea_size;
+
+struct AVTEA;
+
+/**
+  * Allocate an AVTEA context
+  * To free the struct: av_free(ptr)
+  */
+struct AVTEA *av_tea_alloc(void);
+
+/**
+ * Initialize an AVTEA context.
+ *
+ * @param ctx an AVTEA context
+ * @param key a key of 16 bytes used for encryption/decryption
+ * @param rounds the number of rounds in TEA (64 is the "standard")
+ */
+void av_tea_init(struct AVTEA *ctx, const uint8_t key[16], int rounds);
+
+/**
+ * Encrypt or decrypt a buffer using a previously initialized context.
+ *
+ * @param ctx an AVTEA 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 then ECB will be used
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_tea_crypt(struct AVTEA *ctx, uint8_t *dst, const uint8_t *src,
+                  int count, uint8_t *iv, int decrypt);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_TEA_H */

ffmpeg/include/libavutil/threadmessage.h

@@ -0,0 +1,115 @@
+/*
+ * 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_THREADMESSAGE_H
+#define AVUTIL_THREADMESSAGE_H
+
+typedef struct AVThreadMessageQueue AVThreadMessageQueue;
+
+typedef enum AVThreadMessageFlags {
+
+    /**
+     * Perform non-blocking operation.
+     * If this flag is set, send and recv operations are non-blocking and
+     * return AVERROR(EAGAIN) immediately if they can not proceed.
+     */
+    AV_THREAD_MESSAGE_NONBLOCK = 1,
+
+} AVThreadMessageFlags;
+
+/**
+ * Allocate a new message queue.
+ *
+ * @param mq      pointer to the message queue
+ * @param nelem   maximum number of elements in the queue
+ * @param elsize  size of each element in the queue
+ * @return  >=0 for success; <0 for error, in particular AVERROR(ENOSYS) if
+ *          lavu was built without thread support
+ */
+int av_thread_message_queue_alloc(AVThreadMessageQueue **mq,
+                                  unsigned nelem,
+                                  unsigned elsize);
+
+/**
+ * Free a message queue.
+ *
+ * The message queue must no longer be in use by another thread.
+ */
+void av_thread_message_queue_free(AVThreadMessageQueue **mq);
+
+/**
+ * Send a message on the queue.
+ */
+int av_thread_message_queue_send(AVThreadMessageQueue *mq,
+                                 void *msg,
+                                 unsigned flags);
+
+/**
+ * Receive a message from the queue.
+ */
+int av_thread_message_queue_recv(AVThreadMessageQueue *mq,
+                                 void *msg,
+                                 unsigned flags);
+
+/**
+ * Set the sending error code.
+ *
+ * If the error code is set to non-zero, av_thread_message_queue_send() will
+ * return it immediately. Conventional values, such as AVERROR_EOF or
+ * AVERROR(EAGAIN), can be used to cause the sending thread to stop or
+ * suspend its operation.
+ */
+void av_thread_message_queue_set_err_send(AVThreadMessageQueue *mq,
+                                          int err);
+
+/**
+ * Set the receiving error code.
+ *
+ * If the error code is set to non-zero, av_thread_message_queue_recv() will
+ * return it immediately when there are no longer available messages.
+ * Conventional values, such as AVERROR_EOF or AVERROR(EAGAIN), can be used
+ * to cause the receiving thread to stop or suspend its operation.
+ */
+void av_thread_message_queue_set_err_recv(AVThreadMessageQueue *mq,
+                                          int err);
+
+/**
+ * Set the optional free message callback function which will be called if an
+ * operation is removing messages from the queue.
+ */
+void av_thread_message_queue_set_free_func(AVThreadMessageQueue *mq,
+                                           void (*free_func)(void *msg));
+
+/**
+ * Return the current number of messages in the queue.
+ *
+ * @return the current number of messages or AVERROR(ENOSYS) if lavu was built
+ *         without thread support
+ */
+int av_thread_message_queue_nb_elems(AVThreadMessageQueue *mq);
+
+/**
+ * Flush the message queue
+ *
+ * This function is mostly equivalent to reading and free-ing every message
+ * except that it will be done in a single operation (no lock/unlock between
+ * reads).
+ */
+void av_thread_message_flush(AVThreadMessageQueue *mq);
+
+#endif /* AVUTIL_THREADMESSAGE_H */

ffmpeg/include/libavutil/time.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2000-2003 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_TIME_H
+#define AVUTIL_TIME_H
+
+#include <stdint.h>
+
+/**
+ * Get the current time in microseconds.
+ */
+int64_t av_gettime(void);
+
+/**
+ * Get the current time in microseconds since some unspecified starting point.
+ * On platforms that support it, the time comes from a monotonic clock
+ * This property makes this time source ideal for measuring relative time.
+ * The returned values may not be monotonic on platforms where a monotonic
+ * clock is not available.
+ */
+int64_t av_gettime_relative(void);
+
+/**
+ * Indicates with a boolean result if the av_gettime_relative() time source
+ * is monotonic.
+ */
+int av_gettime_relative_is_monotonic(void);
+
+/**
+ * Sleep for a period of time.  Although the duration is expressed in
+ * microseconds, the actual delay may be rounded to the precision of the
+ * system timer.
+ *
+ * @param  usec Number of microseconds to sleep.
+ * @return zero on success or (negative) error code.
+ */
+int av_usleep(unsigned usec);
+
+#endif /* AVUTIL_TIME_H */

ffmpeg/include/libavutil/timecode.h

@@ -0,0 +1,199 @@
+/*
+ * Copyright (c) 2006 Smartjog S.A.S, Baptiste Coudurier <baptiste.coudurier@gmail.com>
+ * Copyright (c) 2011-2012 Smartjog S.A.S, Clément Bœsch <clement.boesch@smartjog.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
+ * Timecode helpers header
+ */
+
+#ifndef AVUTIL_TIMECODE_H
+#define AVUTIL_TIMECODE_H
+
+#include <stdint.h>
+#include "rational.h"
+
+#define AV_TIMECODE_STR_SIZE 23
+
+enum AVTimecodeFlag {
+    AV_TIMECODE_FLAG_DROPFRAME      = 1<<0, ///< timecode is drop frame
+    AV_TIMECODE_FLAG_24HOURSMAX     = 1<<1, ///< timecode wraps after 24 hours
+    AV_TIMECODE_FLAG_ALLOWNEGATIVE  = 1<<2, ///< negative time values are allowed
+};
+
+typedef struct {
+    int start;          ///< timecode frame start (first base frame number)
+    uint32_t flags;     ///< flags such as drop frame, +24 hours support, ...
+    AVRational rate;    ///< frame rate in rational form
+    unsigned fps;       ///< frame per second; must be consistent with the rate field
+} AVTimecode;
+
+/**
+ * Adjust frame number for NTSC drop frame time code.
+ *
+ * @param framenum frame number to adjust
+ * @param fps      frame per second, multiples of 30
+ * @return         adjusted frame number
+ * @warning        adjustment is only valid for multiples of NTSC 29.97
+ */
+int av_timecode_adjust_ntsc_framenum2(int framenum, int fps);
+
+/**
+ * Convert frame number to SMPTE 12M binary representation.
+ *
+ * @param tc       timecode data correctly initialized
+ * @param framenum frame number
+ * @return         the SMPTE binary representation
+ *
+ * See SMPTE ST 314M-2005 Sec 4.4.2.2.1 "Time code pack (TC)"
+ * the format description as follows:
+ * bits 0-5:   hours, in BCD(6bits)
+ * bits 6:     BGF1
+ * bits 7:     BGF2 (NTSC) or FIELD (PAL)
+ * bits 8-14:  minutes, in BCD(7bits)
+ * bits 15:    BGF0 (NTSC) or BGF2 (PAL)
+ * bits 16-22: seconds, in BCD(7bits)
+ * bits 23:    FIELD (NTSC) or BGF0 (PAL)
+ * bits 24-29: frames, in BCD(6bits)
+ * bits 30:    drop  frame flag (0: non drop,    1: drop)
+ * bits 31:    color frame flag (0: unsync mode, 1: sync mode)
+ * @note BCD numbers (6 or 7 bits): 4 or 5 lower bits for units, 2 higher bits for tens.
+ * @note Frame number adjustment is automatically done in case of drop timecode,
+ *       you do NOT have to call av_timecode_adjust_ntsc_framenum2().
+ * @note The frame number is relative to tc->start.
+ * @note Color frame (CF) and binary group flags (BGF) bits are set to zero.
+ */
+uint32_t av_timecode_get_smpte_from_framenum(const AVTimecode *tc, int framenum);
+
+/**
+ * Convert sei info to SMPTE 12M binary representation.
+ *
+ * @param rate     frame rate in rational form
+ * @param drop     drop flag
+ * @param hh       hour
+ * @param mm       minute
+ * @param ss       second
+ * @param ff       frame number
+ * @return         the SMPTE binary representation
+ */
+uint32_t av_timecode_get_smpte(AVRational rate, int drop, int hh, int mm, int ss, int ff);
+
+/**
+ * Load timecode string in buf.
+ *
+ * @param tc       timecode data correctly initialized
+ * @param buf      destination buffer, must be at least AV_TIMECODE_STR_SIZE long
+ * @param framenum frame number
+ * @return         the buf parameter
+ *
+ * @note Timecode representation can be a negative timecode and have more than
+ *       24 hours, but will only be honored if the flags are correctly set.
+ * @note The frame number is relative to tc->start.
+ */
+char *av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum);
+
+/**
+ * Get the timecode string from the SMPTE timecode format.
+ *
+ * In contrast to av_timecode_make_smpte_tc_string this function supports 50/60
+ * fps timecodes by using the field bit.
+ *
+ * @param buf        destination buffer, must be at least AV_TIMECODE_STR_SIZE long
+ * @param rate       frame rate of the timecode
+ * @param tcsmpte    the 32-bit SMPTE timecode
+ * @param prevent_df prevent the use of a drop flag when it is known the DF bit
+ *                   is arbitrary
+ * @param skip_field prevent the use of a field flag when it is known the field
+ *                   bit is arbitrary (e.g. because it is used as PC flag)
+ * @return           the buf parameter
+ */
+char *av_timecode_make_smpte_tc_string2(char *buf, AVRational rate, uint32_t tcsmpte, int prevent_df, int skip_field);
+
+/**
+ * Get the timecode string from the SMPTE timecode format.
+ *
+ * @param buf        destination buffer, must be at least AV_TIMECODE_STR_SIZE long
+ * @param tcsmpte    the 32-bit SMPTE timecode
+ * @param prevent_df prevent the use of a drop flag when it is known the DF bit
+ *                   is arbitrary
+ * @return           the buf parameter
+ */
+char *av_timecode_make_smpte_tc_string(char *buf, uint32_t tcsmpte, int prevent_df);
+
+/**
+ * Get the timecode string from the 25-bit timecode format (MPEG GOP format).
+ *
+ * @param buf     destination buffer, must be at least AV_TIMECODE_STR_SIZE long
+ * @param tc25bit the 25-bits timecode
+ * @return        the buf parameter
+ */
+char *av_timecode_make_mpeg_tc_string(char *buf, uint32_t tc25bit);
+
+/**
+ * Init a timecode struct with the passed parameters.
+ *
+ * @param tc          pointer to an allocated AVTimecode
+ * @param rate        frame rate in rational form
+ * @param flags       miscellaneous flags such as drop frame, +24 hours, ...
+ *                    (see AVTimecodeFlag)
+ * @param frame_start the first frame number
+ * @param log_ctx     a pointer to an arbitrary struct of which the first field
+ *                    is a pointer to an AVClass struct (used for av_log)
+ * @return            0 on success, AVERROR otherwise
+ */
+int av_timecode_init(AVTimecode *tc, AVRational rate, int flags, int frame_start, void *log_ctx);
+
+/**
+ * Init a timecode struct from the passed timecode components.
+ *
+ * @param tc          pointer to an allocated AVTimecode
+ * @param rate        frame rate in rational form
+ * @param flags       miscellaneous flags such as drop frame, +24 hours, ...
+ *                    (see AVTimecodeFlag)
+ * @param hh          hours
+ * @param mm          minutes
+ * @param ss          seconds
+ * @param ff          frames
+ * @param log_ctx     a pointer to an arbitrary struct of which the first field
+ *                    is a pointer to an AVClass struct (used for av_log)
+ * @return            0 on success, AVERROR otherwise
+ */
+int av_timecode_init_from_components(AVTimecode *tc, AVRational rate, int flags, int hh, int mm, int ss, int ff, void *log_ctx);
+
+/**
+ * Parse timecode representation (hh:mm:ss[:;.]ff).
+ *
+ * @param tc      pointer to an allocated AVTimecode
+ * @param rate    frame rate in rational form
+ * @param str     timecode string which will determine the frame start
+ * @param log_ctx a pointer to an arbitrary struct of which the first field is a
+ *                pointer to an AVClass struct (used for av_log).
+ * @return        0 on success, AVERROR otherwise
+ */
+int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx);
+
+/**
+ * Check if the timecode feature is available for the given frame rate
+ *
+ * @return 0 if supported, <0 otherwise
+ */
+int av_timecode_check_frame_rate(AVRational rate);
+
+#endif /* AVUTIL_TIMECODE_H */

ffmpeg/include/libavutil/timestamp.h

@@ -0,0 +1,85 @@
+/*
+ * 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
+ * timestamp utils, mostly useful for debugging/logging purposes
+ */
+
+#ifndef AVUTIL_TIMESTAMP_H
+#define AVUTIL_TIMESTAMP_H
+
+#include "avutil.h"
+
+#if defined(__cplusplus) && !defined(__STDC_FORMAT_MACROS) && !defined(PRId64)
+#error missing -D__STDC_FORMAT_MACROS / #define __STDC_FORMAT_MACROS
+#endif
+
+#define AV_TS_MAX_STRING_SIZE 32
+
+/**
+ * Fill the provided buffer with a string containing a timestamp
+ * representation.
+ *
+ * @param buf a buffer with size in bytes of at least AV_TS_MAX_STRING_SIZE
+ * @param ts the timestamp to represent
+ * @return the buffer in input
+ */
+static inline char *av_ts_make_string(char *buf, int64_t ts)
+{
+    if (ts == AV_NOPTS_VALUE) snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS");
+    else                      snprintf(buf, AV_TS_MAX_STRING_SIZE, "%" PRId64, ts);
+    return buf;
+}
+
+/**
+ * Convenience macro, the return value should be used only directly in
+ * function arguments but never stand-alone.
+ */
+#define av_ts2str(ts) av_ts_make_string((char[AV_TS_MAX_STRING_SIZE]){0}, ts)
+
+/**
+ * Fill the provided buffer with a string containing a timestamp time
+ * representation.
+ *
+ * @param buf a buffer with size in bytes of at least AV_TS_MAX_STRING_SIZE
+ * @param ts the timestamp to represent
+ * @param tb the timebase of the timestamp
+ * @return the buffer in input
+ */
+char *av_ts_make_time_string2(char *buf, int64_t ts, AVRational tb);
+
+/**
+ * Fill the provided buffer with a string containing a timestamp
+ * representation.
+ *
+ * @see av_ts_make_time_string2
+ */
+static inline char *av_ts_make_time_string(char *buf, int64_t ts,
+                                           const AVRational *tb)
+{
+    return av_ts_make_time_string2(buf, ts, *tb);
+}
+
+/**
+ * Convenience macro, the return value should be used only directly in
+ * function arguments but never stand-alone.
+ */
+#define av_ts2timestr(ts, tb) av_ts_make_time_string((char[AV_TS_MAX_STRING_SIZE]){0}, ts, tb)
+
+#endif /* AVUTIL_TIMESTAMP_H */

ffmpeg/include/libavutil/tree.h

@@ -0,0 +1,137 @@
+/*
+ * 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
+ * A tree container.
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#ifndef AVUTIL_TREE_H
+#define AVUTIL_TREE_H
+
+#include "attributes.h"
+
+/**
+ * @addtogroup lavu_tree AVTree
+ * @ingroup lavu_data
+ *
+ * Low-complexity tree container
+ *
+ * Insertion, removal, finding equal, largest which is smaller than and
+ * smallest which is larger than, all have O(log n) worst-case complexity.
+ * @{
+ */
+
+
+struct AVTreeNode;
+extern const int av_tree_node_size;
+
+/**
+ * Allocate an AVTreeNode.
+ */
+struct AVTreeNode *av_tree_node_alloc(void);
+
+/**
+ * Find an element.
+ * @param root a pointer to the root node of the tree
+ * @param next If next is not NULL, then next[0] will contain the previous
+ *             element and next[1] the next element. If either does not exist,
+ *             then the corresponding entry in next is unchanged.
+ * @param cmp compare function used to compare elements in the tree,
+ *            API identical to that of Standard C's qsort
+ *            It is guaranteed that the first and only the first argument to cmp()
+ *            will be the key parameter to av_tree_find(), thus it could if the
+ *            user wants, be a different type (like an opaque context).
+ * @return An element with cmp(key, elem) == 0 or NULL if no such element
+ *         exists in the tree.
+ */
+void *av_tree_find(const struct AVTreeNode *root, void *key,
+                   int (*cmp)(const void *key, const void *b), void *next[2]);
+
+/**
+ * Insert or remove an element.
+ *
+ * If *next is NULL, then the supplied element will be removed if it exists.
+ * If *next is non-NULL, then the supplied element will be inserted, unless
+ * it already exists in the tree.
+ *
+ * @param rootp A pointer to a pointer to the root node of the tree; note that
+ *              the root node can change during insertions, this is required
+ *              to keep the tree balanced.
+ * @param key  pointer to the element key to insert in the tree
+ * @param next Used to allocate and free AVTreeNodes. For insertion the user
+ *             must set it to an allocated and zeroed object of at least
+ *             av_tree_node_size bytes size. av_tree_insert() will set it to
+ *             NULL if it has been consumed.
+ *             For deleting elements *next is set to NULL by the user and
+ *             av_tree_insert() will set it to the AVTreeNode which was
+ *             used for the removed element.
+ *             This allows the use of flat arrays, which have
+ *             lower overhead compared to many malloced elements.
+ *             You might want to define a function like:
+ *             @code
+ *             void *tree_insert(struct AVTreeNode **rootp, void *key,
+ *                               int (*cmp)(void *key, const void *b),
+ *                               AVTreeNode **next)
+ *             {
+ *                 if (!*next)
+ *                     *next = av_mallocz(av_tree_node_size);
+ *                 return av_tree_insert(rootp, key, cmp, next);
+ *             }
+ *             void *tree_remove(struct AVTreeNode **rootp, void *key,
+ *                               int (*cmp)(void *key, const void *b, AVTreeNode **next))
+ *             {
+ *                 av_freep(next);
+ *                 return av_tree_insert(rootp, key, cmp, next);
+ *             }
+ *             @endcode
+ * @param cmp compare function used to compare elements in the tree, API identical
+ *            to that of Standard C's qsort
+ * @return If no insertion happened, the found element; if an insertion or
+ *         removal happened, then either key or NULL will be returned.
+ *         Which one it is depends on the tree state and the implementation. You
+ *         should make no assumptions that it's one or the other in the code.
+ */
+void *av_tree_insert(struct AVTreeNode **rootp, void *key,
+                     int (*cmp)(const void *key, const void *b),
+                     struct AVTreeNode **next);
+
+void av_tree_destroy(struct AVTreeNode *t);
+
+/**
+ * Apply enu(opaque, &elem) to all the elements in the tree in a given range.
+ *
+ * @param cmp a comparison function that returns < 0 for an element below the
+ *            range, > 0 for an element above the range and == 0 for an
+ *            element inside the range
+ *
+ * @note The cmp function should use the same ordering used to construct the
+ *       tree.
+ */
+void av_tree_enumerate(struct AVTreeNode *t, void *opaque,
+                       int (*cmp)(void *opaque, void *elem),
+                       int (*enu)(void *opaque, void *elem));
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_TREE_H */

ffmpeg/include/libavutil/twofish.h

@@ -0,0 +1,70 @@
+/*
+ * An implementation of the TwoFish algorithm
+ * Copyright (c) 2015 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_TWOFISH_H
+#define AVUTIL_TWOFISH_H
+
+#include <stdint.h>
+
+
+/**
+  * @file
+  * @brief Public header for libavutil TWOFISH algorithm
+  * @defgroup lavu_twofish TWOFISH
+  * @ingroup lavu_crypto
+  * @{
+  */
+
+extern const int av_twofish_size;
+
+struct AVTWOFISH;
+
+/**
+  * Allocate an AVTWOFISH context
+  * To free the struct: av_free(ptr)
+  */
+struct AVTWOFISH *av_twofish_alloc(void);
+
+/**
+  * Initialize an AVTWOFISH context.
+  *
+  * @param ctx an AVTWOFISH context
+  * @param key a key of size ranging from 1 to 32 bytes used for encryption/decryption
+  * @param key_bits number of keybits: 128, 192, 256 If less than the required, padded with zeroes to nearest valid value; return value is 0 if key_bits is 128/192/256, -1 if less than 0, 1 otherwise
+ */
+int av_twofish_init(struct AVTWOFISH *ctx, const uint8_t *key, int key_bits);
+
+/**
+  * Encrypt or decrypt a buffer using a previously initialized context
+  *
+  * @param ctx an AVTWOFISH 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_twofish_crypt(struct AVTWOFISH *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t* iv, int decrypt);
+
+/**
+ * @}
+ */
+#endif /* AVUTIL_TWOFISH_H */

ffmpeg/include/libavutil/tx.h

@@ -0,0 +1,210 @@
+/*
+ * 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_TX_H
+#define AVUTIL_TX_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+typedef struct AVTXContext AVTXContext;
+
+typedef struct AVComplexFloat {
+    float re, im;
+} AVComplexFloat;
+
+typedef struct AVComplexDouble {
+    double re, im;
+} AVComplexDouble;
+
+typedef struct AVComplexInt32 {
+    int32_t re, im;
+} AVComplexInt32;
+
+enum AVTXType {
+    /**
+     * Standard complex to complex FFT with sample data type of AVComplexFloat,
+     * AVComplexDouble or AVComplexInt32, for each respective variant.
+     *
+     * Output is not 1/len normalized. Scaling currently unsupported.
+     * The stride parameter must be set to the size of a single sample in bytes.
+     */
+    AV_TX_FLOAT_FFT  = 0,
+    AV_TX_DOUBLE_FFT = 2,
+    AV_TX_INT32_FFT  = 4,
+
+    /**
+     * Standard MDCT with a sample data type of float, double or int32_t,
+     * respecively. For the float and int32 variants, the scale type is
+     * 'float', while for the double variant, it's 'double'.
+     * If scale is NULL, 1.0 will be used as a default.
+     *
+     * Length is the frame size, not the window size (which is 2x frame).
+     * For forward transforms, the stride specifies the spacing between each
+     * sample in the output array in bytes. The input must be a flat array.
+     *
+     * For inverse transforms, the stride specifies the spacing between each
+     * sample in the input array in bytes. The output must be a flat array.
+     *
+     * NOTE: the inverse transform is half-length, meaning the output will not
+     * contain redundant data. This is what most codecs work with. To do a full
+     * inverse transform, set the AV_TX_FULL_IMDCT flag on init.
+     */
+    AV_TX_FLOAT_MDCT  = 1,
+    AV_TX_DOUBLE_MDCT = 3,
+    AV_TX_INT32_MDCT  = 5,
+
+    /**
+     * Real to complex and complex to real DFTs.
+     * For the float and int32 variants, the scale type is 'float', while for
+     * the double variant, it's a 'double'. If scale is NULL, 1.0 will be used
+     * as a default.
+     *
+     * For forward transforms (R2C), stride must be the spacing between two
+     * samples in bytes. For inverse transforms, the stride must be set
+     * to the spacing between two complex values in bytes.
+     *
+     * The forward transform performs a real-to-complex DFT of N samples to
+     * N/2+1 complex values.
+     *
+     * The inverse transform performs a complex-to-real DFT of N/2+1 complex
+     * values to N real samples. The output is not normalized, but can be
+     * made so by setting the scale value to 1.0/len.
+     * NOTE: the inverse transform always overwrites the input.
+     */
+    AV_TX_FLOAT_RDFT  = 6,
+    AV_TX_DOUBLE_RDFT = 7,
+    AV_TX_INT32_RDFT  = 8,
+
+    /**
+     * Real to real (DCT) transforms.
+     *
+     * The forward transform is a DCT-II.
+     * The inverse transform is a DCT-III.
+     *
+     * The input array is always overwritten. DCT-III requires that the
+     * input be padded with 2 extra samples. Stride must be set to the
+     * spacing between two samples in bytes.
+     */
+    AV_TX_FLOAT_DCT  = 9,
+    AV_TX_DOUBLE_DCT = 10,
+    AV_TX_INT32_DCT  = 11,
+
+    /**
+     * Discrete Cosine Transform I
+     *
+     * The forward transform is a DCT-I.
+     * The inverse transform is a DCT-I multiplied by 2/(N + 1).
+     *
+     * The input array is always overwritten.
+     */
+    AV_TX_FLOAT_DCT_I  = 12,
+    AV_TX_DOUBLE_DCT_I = 13,
+    AV_TX_INT32_DCT_I  = 14,
+
+    /**
+     * Discrete Sine Transform I
+     *
+     * The forward transform is a DST-I.
+     * The inverse transform is a DST-I multiplied by 2/(N + 1).
+     *
+     * The input array is always overwritten.
+     */
+    AV_TX_FLOAT_DST_I  = 15,
+    AV_TX_DOUBLE_DST_I = 16,
+    AV_TX_INT32_DST_I  = 17,
+
+    /* Not part of the API, do not use */
+    AV_TX_NB,
+};
+
+/**
+ * Function pointer to a function to perform the transform.
+ *
+ * @note Using a different context than the one allocated during av_tx_init()
+ * is not allowed.
+ *
+ * @param s the transform context
+ * @param out the output array
+ * @param in the input array
+ * @param stride the input or output stride in bytes
+ *
+ * The out and in arrays must be aligned to the maximum required by the CPU
+ * architecture unless the AV_TX_UNALIGNED flag was set in av_tx_init().
+ * The stride must follow the constraints the transform type has specified.
+ */
+typedef void (*av_tx_fn)(AVTXContext *s, void *out, void *in, ptrdiff_t stride);
+
+/**
+ * Flags for av_tx_init()
+ */
+enum AVTXFlags {
+    /**
+     * Allows for in-place transformations, where input == output.
+     * May be unsupported or slower for some transform types.
+     */
+    AV_TX_INPLACE = 1ULL << 0,
+
+    /**
+     * Relaxes alignment requirement for the in and out arrays of av_tx_fn().
+     * May be slower with certain transform types.
+     */
+    AV_TX_UNALIGNED = 1ULL << 1,
+
+    /**
+     * Performs a full inverse MDCT rather than leaving out samples that can be
+     * derived through symmetry. Requires an output array of 'len' floats,
+     * rather than the usual 'len/2' floats.
+     * Ignored for all transforms but inverse MDCTs.
+     */
+    AV_TX_FULL_IMDCT = 1ULL << 2,
+
+    /**
+     * Perform a real to half-complex RDFT.
+     * Only the real, or imaginary coefficients will
+     * be output, depending on the flag used. Only available for forward RDFTs.
+     * Output array must have enough space to hold N complex values
+     * (regular size for a real to complex transform).
+     */
+    AV_TX_REAL_TO_REAL      = 1ULL << 3,
+    AV_TX_REAL_TO_IMAGINARY = 1ULL << 4,
+};
+
+/**
+ * Initialize a transform context with the given configuration
+ * (i)MDCTs with an odd length are currently not supported.
+ *
+ * @param ctx the context to allocate, will be NULL on error
+ * @param tx pointer to the transform function pointer to set
+ * @param type type the type of transform
+ * @param inv whether to do an inverse or a forward transform
+ * @param len the size of the transform in samples
+ * @param scale pointer to the value to scale the output if supported by type
+ * @param flags a bitmask of AVTXFlags or 0
+ *
+ * @return 0 on success, negative error code on failure
+ */
+int av_tx_init(AVTXContext **ctx, av_tx_fn *tx, enum AVTXType type,
+               int inv, int len, const void *scale, uint64_t flags);
+
+/**
+ * Frees a context and sets *ctx to NULL, does nothing when *ctx == NULL.
+ */
+void av_tx_uninit(AVTXContext **ctx);
+
+#endif /* AVUTIL_TX_H */

ffmpeg/include/libavutil/uuid.h

@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2022 Pierre-Anthony Lemieux <pal@palemieux.com>
+ *                    Zane van Iperen <zane@zanevaniperen.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
+ * UUID parsing and serialization utilities.
+ * The library treats the UUID as an opaque sequence of 16 unsigned bytes,
+ * i.e. ignoring the internal layout of the UUID, which depends on the type
+ * of the UUID.
+ *
+ * @author Pierre-Anthony Lemieux <pal@palemieux.com>
+ * @author Zane van Iperen <zane@zanevaniperen.com>
+ */
+
+#ifndef AVUTIL_UUID_H
+#define AVUTIL_UUID_H
+
+#include <stdint.h>
+#include <string.h>
+
+#define AV_PRI_UUID                          \
+    "%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-" \
+    "%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
+
+#define AV_PRI_URN_UUID                               \
+    "urn:uuid:%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-" \
+    "%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
+
+/* AV_UUID_ARG() is used together with AV_PRI_UUID() or AV_PRI_URN_UUID
+ * to print UUIDs, e.g.
+ * av_log(NULL, AV_LOG_DEBUG, "UUID: " AV_PRI_UUID, AV_UUID_ARG(uuid));
+ */
+#define AV_UUID_ARG(x)                  \
+    (x)[ 0], (x)[ 1], (x)[ 2], (x)[ 3], \
+    (x)[ 4], (x)[ 5], (x)[ 6], (x)[ 7], \
+    (x)[ 8], (x)[ 9], (x)[10], (x)[11], \
+    (x)[12], (x)[13], (x)[14], (x)[15]
+
+#define AV_UUID_LEN 16
+
+/* Binary representation of a UUID */
+typedef uint8_t AVUUID[AV_UUID_LEN];
+
+/**
+ * Parses a string representation of a UUID formatted according to IETF RFC 4122
+ * into an AVUUID. The parsing is case-insensitive. The string must be 37
+ * characters long, including the terminating NUL character.
+ *
+ * Example string representation: "2fceebd0-7017-433d-bafb-d073a7116696"
+ *
+ * @param[in]  in  String representation of a UUID,
+ *                 e.g. 2fceebd0-7017-433d-bafb-d073a7116696
+ * @param[out] uu  AVUUID
+ * @return         A non-zero value in case of an error.
+ */
+int av_uuid_parse(const char *in, AVUUID uu);
+
+/**
+ * Parses a URN representation of a UUID, as specified at IETF RFC 4122,
+ * into an AVUUID. The parsing is case-insensitive. The string must be 46
+ * characters long, including the terminating NUL character.
+ *
+ * Example string representation: "urn:uuid:2fceebd0-7017-433d-bafb-d073a7116696"
+ *
+ * @param[in]  in  URN UUID
+ * @param[out] uu  AVUUID
+ * @return         A non-zero value in case of an error.
+ */
+int av_uuid_urn_parse(const char *in, AVUUID uu);
+
+/**
+ * Parses a string representation of a UUID formatted according to IETF RFC 4122
+ * into an AVUUID. The parsing is case-insensitive.
+ *
+ * @param[in]  in_start Pointer to the first character of the string representation
+ * @param[in]  in_end   Pointer to the character after the last character of the
+ *                      string representation. That memory location is never
+ *                      accessed. It is an error if `in_end - in_start != 36`.
+ * @param[out] uu       AVUUID
+ * @return              A non-zero value in case of an error.
+ */
+int av_uuid_parse_range(const char *in_start, const char *in_end, AVUUID uu);
+
+/**
+ * Serializes a AVUUID into a string representation according to IETF RFC 4122.
+ * The string is lowercase and always 37 characters long, including the
+ * terminating NUL character.
+ *
+ * @param[in]  uu  AVUUID
+ * @param[out] out Pointer to an array of no less than 37 characters.
+ */
+void av_uuid_unparse(const AVUUID uu, char *out);
+
+/**
+ * Compares two UUIDs for equality.
+ *
+ * @param[in]  uu1  AVUUID
+ * @param[in]  uu2  AVUUID
+ * @return          Nonzero if uu1 and uu2 are identical, 0 otherwise
+ */
+static inline int av_uuid_equal(const AVUUID uu1, const AVUUID uu2)
+{
+    return memcmp(uu1, uu2, AV_UUID_LEN) == 0;
+}
+
+/**
+ * Copies the bytes of src into dest.
+ *
+ * @param[out]  dest  AVUUID
+ * @param[in]   src   AVUUID
+ */
+static inline void av_uuid_copy(AVUUID dest, const AVUUID src)
+{
+    memcpy(dest, src, AV_UUID_LEN);
+}
+
+/**
+ * Sets a UUID to the nil UUID, i.e. a UUID with have all
+ * its 128 bits set to zero.
+ *
+ * @param[in,out]  uu  UUID to be set to the nil UUID
+ */
+static inline void av_uuid_nil(AVUUID uu)
+{
+    memset(uu, 0, AV_UUID_LEN);
+}
+
+#endif /* AVUTIL_UUID_H */

ffmpeg/include/libavutil/version.h

@@ -0,0 +1,126 @@
+/*
+ * copyright (c) 2003 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
+ */
+
+/**
+ * @file
+ * @ingroup lavu
+ * Libavutil version macros
+ */
+
+#ifndef AVUTIL_VERSION_H
+#define AVUTIL_VERSION_H
+
+#include "macros.h"
+
+/**
+ * @addtogroup version_utils
+ *
+ * Useful to check and match library version in order to maintain
+ * backward compatibility.
+ *
+ * The FFmpeg libraries follow a versioning sheme very similar to
+ * Semantic Versioning (http://semver.org/)
+ * The difference is that the component called PATCH is called MICRO in FFmpeg
+ * and its value is reset to 100 instead of 0 to keep it above or equal to 100.
+ * Also we do not increase MICRO for every bugfix or change in git master.
+ *
+ * Prior to FFmpeg 3.2 point releases did not change any lib version number to
+ * avoid aliassing different git master checkouts.
+ * Starting with FFmpeg 3.2, the released library versions will occupy
+ * a separate MAJOR.MINOR that is not used on the master development branch.
+ * That is if we branch a release of master 55.10.123 we will bump to 55.11.100
+ * for the release and master will continue at 55.12.100 after it. Each new
+ * point release will then bump the MICRO improving the usefulness of the lib
+ * versions.
+ *
+ * @{
+ */
+
+#define AV_VERSION_INT(a, b, c) ((a)<<16 | (b)<<8 | (c))
+#define AV_VERSION_DOT(a, b, c) a ##.## b ##.## c
+#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
+
+/**
+ * Extract version components from the full ::AV_VERSION_INT int as returned
+ * by functions like ::avformat_version() and ::avcodec_version()
+ */
+#define AV_VERSION_MAJOR(a) ((a) >> 16)
+#define AV_VERSION_MINOR(a) (((a) & 0x00FF00) >> 8)
+#define AV_VERSION_MICRO(a) ((a) & 0xFF)
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavu_ver Version and Build diagnostics
+ *
+ * Macros and function useful to check at compiletime and at runtime
+ * which version of libavutil is in use.
+ *
+ * @{
+ */
+
+#define LIBAVUTIL_VERSION_MAJOR  59
+#define LIBAVUTIL_VERSION_MINOR  54
+#define LIBAVUTIL_VERSION_MICRO 101
+
+#define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
+                                               LIBAVUTIL_VERSION_MINOR, \
+                                               LIBAVUTIL_VERSION_MICRO)
+#define LIBAVUTIL_VERSION       AV_VERSION(LIBAVUTIL_VERSION_MAJOR,     \
+                                           LIBAVUTIL_VERSION_MINOR,     \
+                                           LIBAVUTIL_VERSION_MICRO)
+#define LIBAVUTIL_BUILD         LIBAVUTIL_VERSION_INT
+
+#define LIBAVUTIL_IDENT         "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)
+
+/**
+ * @defgroup lavu_depr_guards Deprecation Guards
+ * 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_HDR_VIVID_THREE_SPLINE   (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_FRAME_PKT                (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_INTERLACED_FRAME         (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_FRAME_KEY                (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_PALETTE_HAS_CHANGED      (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_VULKAN_CONTIGUOUS_MEMORY (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_H274_FILM_GRAIN_VCS      (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_MOD_UINTP2               (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_RISCV_FD_ZBA             (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_VULKAN_FIXED_QUEUES      (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_OPT_INT_LIST             (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_OPT_PTR                  (LIBAVUTIL_VERSION_MAJOR < 60)
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* AVUTIL_VERSION_H */

ffmpeg/include/libavutil/video_enc_params.h

@@ -0,0 +1,171 @@
+/*
+ * 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_VIDEO_ENC_PARAMS_H
+#define AVUTIL_VIDEO_ENC_PARAMS_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/frame.h"
+
+enum AVVideoEncParamsType {
+    AV_VIDEO_ENC_PARAMS_NONE = -1,
+    /**
+     * VP9 stores:
+     * - per-frame base (luma AC) quantizer index, exported as AVVideoEncParams.qp
+     * - deltas for luma DC, chroma AC and chroma DC, exported in the
+     *   corresponding entries in AVVideoEncParams.delta_qp
+     * - per-segment delta, exported as for each block as AVVideoBlockParams.delta_qp
+     *
+     * To compute the resulting quantizer index for a block:
+     * - for luma AC, add the base qp and the per-block delta_qp, saturating to
+     *   unsigned 8-bit.
+     * - for luma DC and chroma AC/DC, add the corresponding
+     *   AVVideoBlockParams.delta_qp to the luma AC index, again saturating to
+     *   unsigned 8-bit.
+     */
+    AV_VIDEO_ENC_PARAMS_VP9,
+
+    /**
+     * H.264 stores:
+     * - in PPS (per-picture):
+     *   * initial QP_Y (luma) value, exported as AVVideoEncParams.qp
+     *   * delta(s) for chroma QP values (same for both, or each separately),
+     *     exported as in the corresponding entries in AVVideoEncParams.delta_qp
+     * - per-slice QP delta, not exported directly, added to the per-MB value
+     * - per-MB delta; not exported directly; the final per-MB quantizer
+     *   parameter - QP_Y - minus the value in AVVideoEncParams.qp is exported
+     *   as AVVideoBlockParams.qp_delta.
+     */
+    AV_VIDEO_ENC_PARAMS_H264,
+
+    /*
+     * MPEG-2-compatible quantizer.
+     *
+     * Summing the frame-level qp with the per-block delta_qp gives the
+     * resulting quantizer for the block.
+     */
+    AV_VIDEO_ENC_PARAMS_MPEG2,
+};
+
+/**
+ * Video encoding parameters for a given frame. This struct is allocated along
+ * with an optional array of per-block AVVideoBlockParams descriptors.
+ * Must be allocated with av_video_enc_params_alloc().
+ */
+typedef struct AVVideoEncParams {
+    /**
+     * Number of blocks in the array.
+     *
+     * May be 0, in which case no per-block information is present. In this case
+     * the values of blocks_offset / block_size are unspecified and should not
+     * be accessed.
+     */
+    unsigned int nb_blocks;
+    /**
+     * Offset in bytes from the beginning of this structure at which the array
+     * of blocks starts.
+     */
+    size_t blocks_offset;
+    /*
+     * Size of each block in bytes. May not match sizeof(AVVideoBlockParams).
+     */
+    size_t block_size;
+
+    /**
+     * Type of the parameters (the codec they are used with).
+     */
+    enum AVVideoEncParamsType type;
+
+    /**
+     * Base quantisation parameter for the frame. The final quantiser for a
+     * given block in a given plane is obtained from this value, possibly
+     * combined with {@code delta_qp} and the per-block delta in a manner
+     * documented for each type.
+     */
+    int32_t qp;
+
+    /**
+     * Quantisation parameter offset from the base (per-frame) qp for a given
+     * plane (first index) and AC/DC coefficients (second index).
+     */
+    int32_t delta_qp[4][2];
+} AVVideoEncParams;
+
+/**
+ * Data structure for storing block-level encoding information.
+ * It is allocated as a part of AVVideoEncParams and should be retrieved with
+ * av_video_enc_params_block().
+ *
+ * sizeof(AVVideoBlockParams) is not a part of the ABI and new fields may be
+ * added to it.
+ */
+typedef struct AVVideoBlockParams {
+    /**
+     * Distance in luma pixels from the top-left corner of the visible frame
+     * to the top-left corner of the block.
+     * Can be negative if top/right padding is present on the coded frame.
+     */
+    int src_x, src_y;
+    /**
+     * Width and height of the block in luma pixels.
+     */
+    int w, h;
+
+    /**
+     * Difference between this block's final quantization parameter and the
+     * corresponding per-frame value.
+     */
+    int32_t delta_qp;
+} AVVideoBlockParams;
+
+/**
+ * Get the block at the specified {@code idx}. Must be between 0 and nb_blocks - 1.
+ */
+static av_always_inline AVVideoBlockParams*
+av_video_enc_params_block(AVVideoEncParams *par, unsigned int idx)
+{
+    av_assert0(idx < par->nb_blocks);
+    return (AVVideoBlockParams *)((uint8_t *)par + par->blocks_offset +
+                                  idx * par->block_size);
+}
+
+/**
+ * Allocates memory for AVVideoEncParams of the given type, plus an array of
+ * {@code nb_blocks} AVVideoBlockParams and initializes the variables. Can be
+ * freed with a normal av_free() call.
+ *
+ * @param out_size if non-NULL, the size in bytes of the resulting data array is
+ * written here.
+ */
+AVVideoEncParams *av_video_enc_params_alloc(enum AVVideoEncParamsType type,
+                                            unsigned int nb_blocks, size_t *out_size);
+
+/**
+ * Allocates memory for AVEncodeInfoFrame plus an array of
+ * {@code nb_blocks} AVEncodeInfoBlock in the given AVFrame {@code frame}
+ * as AVFrameSideData of type AV_FRAME_DATA_VIDEO_ENC_PARAMS
+ * and initializes the variables.
+ */
+AVVideoEncParams*
+av_video_enc_params_create_side_data(AVFrame *frame, enum AVVideoEncParamsType type,
+                                     unsigned int nb_blocks);
+
+#endif /* AVUTIL_VIDEO_ENC_PARAMS_H */

ffmpeg/include/libavutil/video_hint.h

@@ -0,0 +1,107 @@
+/**
+ * Copyright 2023 Elias Carotti <eliascrt at amazon dot it>
+ *
+ * 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_VIDEO_HINT_H
+#define AVUTIL_VIDEO_HINT_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include "libavutil/avassert.h"
+#include "libavutil/frame.h"
+
+typedef struct AVVideoRect {
+    uint32_t x, y;
+    uint32_t width, height;
+} AVVideoRect;
+
+typedef enum AVVideoHintType {
+    /* rectangled delimit the constant areas (unchanged), default is changed */
+    AV_VIDEO_HINT_TYPE_CONSTANT,
+
+    /* rectangled delimit the constant areas (changed), default is not changed */
+    AV_VIDEO_HINT_TYPE_CHANGED,
+} AVVideoHintType;
+
+typedef struct AVVideoHint {
+    /**
+     * Number of AVVideoRect present.
+     *
+     * May be 0, in which case no per-rectangle information is present. In this
+     * case the values of rect_offset / rect_size are unspecified and should
+     * not be accessed.
+     */
+    size_t nb_rects;
+
+    /**
+     * Offset in bytes from the beginning of this structure at which the array
+     * of AVVideoRect starts.
+     */
+    size_t rect_offset;
+
+    /**
+     * Size in bytes of AVVideoRect.
+     */
+    size_t rect_size;
+
+    AVVideoHintType type;
+} AVVideoHint;
+
+static av_always_inline AVVideoRect *
+av_video_hint_rects(const AVVideoHint *hints) {
+    return (AVVideoRect *)((uint8_t *)hints + hints->rect_offset);
+}
+
+static av_always_inline AVVideoRect *
+av_video_hint_get_rect(const AVVideoHint *hints, size_t idx) {
+    return (AVVideoRect *)((uint8_t *)hints + hints->rect_offset + idx * hints->rect_size);
+}
+
+/**
+ * Allocate memory for the AVVideoHint struct along with an nb_rects-sized
+ * arrays of AVVideoRect.
+ *
+ * The side data contains a list of rectangles for the portions of the frame
+ * which changed from the last encoded one (and the remainder are assumed to be
+ * changed), or, alternately (depending on the type parameter) the unchanged
+ * ones (and the remanining ones are those which changed).
+ * Macroblocks will thus be hinted either to be P_SKIP-ped or go through the
+ * regular encoding procedure.
+ *
+ * It's responsibility of the caller to fill the AVRects accordingly, and to set
+ * the proper AVVideoHintType field.
+ *
+ * @param out_size if non-NULL, the size in bytes of the resulting data array is
+ *                 written here
+ *
+ * @return newly allocated AVVideoHint struct (must be freed by the caller using
+ *         av_free()) on success, NULL on memory allocation failure
+ */
+AVVideoHint *av_video_hint_alloc(size_t nb_rects,
+                                 size_t *out_size);
+
+/**
+ * Same as av_video_hint_alloc(), except newly-allocated AVVideoHint is attached
+ * as side data of type AV_FRAME_DATA_VIDEO_HINT_INFO to frame.
+ */
+AVVideoHint *av_video_hint_create_side_data(AVFrame *frame,
+                                            size_t nb_rects);
+
+
+#endif /* AVUTIL_VIDEO_HINT_H */

ffmpeg/include/libavutil/xtea.h

@@ -0,0 +1,94 @@
+/*
+ * A 32-bit implementation of the XTEA 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_XTEA_H
+#define AVUTIL_XTEA_H
+
+#include <stdint.h>
+
+/**
+ * @file
+ * @brief Public header for libavutil XTEA algorithm
+ * @defgroup lavu_xtea XTEA
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+typedef struct AVXTEA {
+    uint32_t key[16];
+} AVXTEA;
+
+/**
+ * Allocate an AVXTEA context.
+ */
+AVXTEA *av_xtea_alloc(void);
+
+/**
+ * Initialize an AVXTEA context.
+ *
+ * @param ctx an AVXTEA context
+ * @param key a key of 16 bytes used for encryption/decryption,
+ *            interpreted as big endian 32 bit numbers
+ */
+void av_xtea_init(struct AVXTEA *ctx, const uint8_t key[16]);
+
+/**
+ * Initialize an AVXTEA context.
+ *
+ * @param ctx an AVXTEA context
+ * @param key a key of 16 bytes used for encryption/decryption,
+ *            interpreted as little endian 32 bit numbers
+ */
+void av_xtea_le_init(struct AVXTEA *ctx, const uint8_t key[16]);
+
+/**
+ * Encrypt or decrypt a buffer using a previously initialized context,
+ * in big endian format.
+ *
+ * @param ctx an AVXTEA 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 then ECB will be used
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_xtea_crypt(struct AVXTEA *ctx, uint8_t *dst, const uint8_t *src,
+                   int count, uint8_t *iv, int decrypt);
+
+/**
+ * Encrypt or decrypt a buffer using a previously initialized context,
+ * in little endian format.
+ *
+ * @param ctx an AVXTEA 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 then ECB will be used
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_xtea_le_crypt(struct AVXTEA *ctx, uint8_t *dst, const uint8_t *src,
+                      int count, uint8_t *iv, int decrypt);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_XTEA_H */

ffmpeg/include/libpostproc/postprocess.h

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2001-2003 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 General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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 POSTPROC_POSTPROCESS_H
+#define POSTPROC_POSTPROCESS_H
+
+/**
+ * @file
+ * @ingroup lpp
+ * external API header
+ */
+
+/**
+ * @defgroup lpp libpostproc
+ * Video postprocessing library.
+ *
+ * @{
+ */
+
+#include "libpostproc/version_major.h"
+#ifndef HAVE_AV_CONFIG_H
+/* When included as part of the ffmpeg build, only include the major version
+ * to avoid unnecessary rebuilds. When included externally, keep including
+ * the full version information. */
+#include "libpostproc/version.h"
+#endif
+
+/**
+ * Return the LIBPOSTPROC_VERSION_INT constant.
+ */
+unsigned postproc_version(void);
+
+/**
+ * Return the libpostproc build-time configuration.
+ */
+const char *postproc_configuration(void);
+
+/**
+ * Return the libpostproc license.
+ */
+const char *postproc_license(void);
+
+#define PP_QUALITY_MAX 6
+
+#include <inttypes.h>
+
+typedef void pp_context;
+typedef void pp_mode;
+
+extern const char pp_help[]; ///< a simple help text
+
+void  pp_postprocess(const uint8_t * src[3], const int srcStride[3],
+                     uint8_t * dst[3], const int dstStride[3],
+                     int horizontalSize, int verticalSize,
+                     const int8_t *QP_store,  int QP_stride,
+                     pp_mode *mode, pp_context *ppContext, int pict_type);
+
+
+/**
+ * Return a pp_mode or NULL if an error occurred.
+ *
+ * @param name    the string after "-pp" on the command line
+ * @param quality a number from 0 to PP_QUALITY_MAX
+ */
+pp_mode *pp_get_mode_by_name_and_quality(const char *name, int quality);
+void pp_free_mode(pp_mode *mode);
+
+pp_context *pp_get_context(int width, int height, int flags);
+void pp_free_context(pp_context *ppContext);
+
+#define PP_CPU_CAPS_MMX   0x80000000
+#define PP_CPU_CAPS_MMX2  0x20000000
+#define PP_CPU_CAPS_3DNOW 0x40000000
+#define PP_CPU_CAPS_ALTIVEC 0x10000000
+#define PP_CPU_CAPS_AUTO  0x00080000
+
+#define PP_FORMAT         0x00000008
+#define PP_FORMAT_420    (0x00000011|PP_FORMAT)
+#define PP_FORMAT_422    (0x00000001|PP_FORMAT)
+#define PP_FORMAT_411    (0x00000002|PP_FORMAT)
+#define PP_FORMAT_444    (0x00000000|PP_FORMAT)
+#define PP_FORMAT_440    (0x00000010|PP_FORMAT)
+
+#define PP_PICT_TYPE_QP2  0x00000010 ///< MPEG2 style QScale
+
+/**
+ * @}
+ */
+
+#endif /* POSTPROC_POSTPROCESS_H */

ffmpeg/include/libpostproc/version.h

@@ -0,0 +1,46 @@
+/*
+ * 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 POSTPROC_VERSION_H
+#define POSTPROC_VERSION_H
+
+/**
+ * @file
+ * Libpostproc version macros
+ */
+
+#include "libavutil/version.h"
+
+#include "version_major.h"
+
+#define LIBPOSTPROC_VERSION_MINOR   4
+#define LIBPOSTPROC_VERSION_MICRO 100
+
+#define LIBPOSTPROC_VERSION_INT AV_VERSION_INT(LIBPOSTPROC_VERSION_MAJOR, \
+                                               LIBPOSTPROC_VERSION_MINOR, \
+                                               LIBPOSTPROC_VERSION_MICRO)
+#define LIBPOSTPROC_VERSION     AV_VERSION(LIBPOSTPROC_VERSION_MAJOR, \
+                                           LIBPOSTPROC_VERSION_MINOR, \
+                                           LIBPOSTPROC_VERSION_MICRO)
+#define LIBPOSTPROC_BUILD       LIBPOSTPROC_VERSION_INT
+
+#define LIBPOSTPROC_IDENT       "postproc" AV_STRINGIFY(LIBPOSTPROC_VERSION)
+
+#endif /* POSTPROC_VERSION_H */

ffmpeg/include/libpostproc/version_major.h

@@ -0,0 +1,31 @@
+/*
+ * 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 POSTPROC_VERSION_MAJOR_H
+#define POSTPROC_VERSION_MAJOR_H
+
+/**
+ * @file
+ * Libpostproc version macros
+ */
+
+#define LIBPOSTPROC_VERSION_MAJOR  58
+
+#endif /* POSTPROC_VERSION_MAJOR_H */

ffmpeg/include/libswresample/swresample.h

@@ -0,0 +1,587 @@
+/*
+ * Copyright (C) 2011-2013 Michael Niedermayer (michaelni@gmx.at)
+ *
+ * This file is part of libswresample
+ *
+ * libswresample 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.
+ *
+ * libswresample 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 libswresample; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef SWRESAMPLE_SWRESAMPLE_H
+#define SWRESAMPLE_SWRESAMPLE_H
+
+/**
+ * @file
+ * @ingroup lswr
+ * libswresample public header
+ */
+
+/**
+ * @defgroup lswr libswresample
+ * @{
+ *
+ * Audio resampling, sample format conversion and mixing library.
+ *
+ * Interaction with lswr is done through SwrContext, which is
+ * allocated with swr_alloc() or swr_alloc_set_opts2(). It is opaque, so all parameters
+ * must be set with the @ref avoptions API.
+ *
+ * The first thing you will need to do in order to use lswr is to allocate
+ * SwrContext. This can be done with swr_alloc() or swr_alloc_set_opts2(). If you
+ * are using the former, you must set options through the @ref avoptions API.
+ * The latter function provides the same feature, but it allows you to set some
+ * common options in the same statement.
+ *
+ * For example the following code will setup conversion from planar float sample
+ * format to interleaved signed 16-bit integer, downsampling from 48kHz to
+ * 44.1kHz and downmixing from 5.1 channels to stereo (using the default mixing
+ * matrix). This is using the swr_alloc() function.
+ * @code
+ * SwrContext *swr = swr_alloc();
+ * av_opt_set_chlayout(swr, "in_chlayout", &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1, 0);
+ * av_opt_set_chlayout(swr, "out_chlayout", &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO, 0);
+ * av_opt_set_int(swr, "in_sample_rate",     48000,                0);
+ * av_opt_set_int(swr, "out_sample_rate",    44100,                0);
+ * av_opt_set_sample_fmt(swr, "in_sample_fmt",  AV_SAMPLE_FMT_FLTP, 0);
+ * av_opt_set_sample_fmt(swr, "out_sample_fmt", AV_SAMPLE_FMT_S16,  0);
+ * @endcode
+ *
+ * The same job can be done using swr_alloc_set_opts2() as well:
+ * @code
+ * SwrContext *swr = NULL;
+ * int ret = swr_alloc_set_opts2(&swr,         // we're allocating a new context
+ *                       &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO, // out_ch_layout
+ *                       AV_SAMPLE_FMT_S16,    // out_sample_fmt
+ *                       44100,                // out_sample_rate
+ *                       &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1, // in_ch_layout
+ *                       AV_SAMPLE_FMT_FLTP,   // in_sample_fmt
+ *                       48000,                // in_sample_rate
+ *                       0,                    // log_offset
+ *                       NULL);                // log_ctx
+ * @endcode
+ *
+ * Once all values have been set, it must be initialized with swr_init(). If
+ * you need to change the conversion parameters, you can change the parameters
+ * using @ref avoptions, as described above in the first example; or by using
+ * swr_alloc_set_opts2(), but with the first argument the allocated context.
+ * You must then call swr_init() again.
+ *
+ * The conversion itself is done by repeatedly calling swr_convert().
+ * Note that the samples may get buffered in swr if you provide insufficient
+ * output space or if sample rate conversion is done, which requires "future"
+ * samples. Samples that do not require future input can be retrieved at any
+ * time by using swr_convert() (in_count can be set to 0).
+ * At the end of conversion the resampling buffer can be flushed by calling
+ * swr_convert() with NULL in and 0 in_count.
+ *
+ * The samples used in the conversion process can be managed with the libavutil
+ * @ref lavu_sampmanip "samples manipulation" API, including av_samples_alloc()
+ * function used in the following example.
+ *
+ * The delay between input and output, can at any time be found by using
+ * swr_get_delay().
+ *
+ * The following code demonstrates the conversion loop assuming the parameters
+ * from above and caller-defined functions get_input() and handle_output():
+ * @code
+ * uint8_t **input;
+ * int in_samples;
+ *
+ * while (get_input(&input, &in_samples)) {
+ *     uint8_t *output;
+ *     int out_samples = av_rescale_rnd(swr_get_delay(swr, 48000) +
+ *                                      in_samples, 44100, 48000, AV_ROUND_UP);
+ *     av_samples_alloc(&output, NULL, 2, out_samples,
+ *                      AV_SAMPLE_FMT_S16, 0);
+ *     out_samples = swr_convert(swr, &output, out_samples,
+ *                                      input, in_samples);
+ *     handle_output(output, out_samples);
+ *     av_freep(&output);
+ * }
+ * @endcode
+ *
+ * When the conversion is finished, the conversion
+ * context and everything associated with it must be freed with swr_free().
+ * A swr_close() function is also available, but it exists mainly for
+ * compatibility with libavresample, and is not required to be called.
+ *
+ * There will be no memory leak if the data is not completely flushed before
+ * swr_free().
+ */
+
+#include <stdint.h>
+#include "libavutil/channel_layout.h"
+#include "libavutil/frame.h"
+#include "libavutil/samplefmt.h"
+
+#include "libswresample/version_major.h"
+#ifndef HAVE_AV_CONFIG_H
+/* When included as part of the ffmpeg build, only include the major version
+ * to avoid unnecessary rebuilds. When included externally, keep including
+ * the full version information. */
+#include "libswresample/version.h"
+#endif
+
+/**
+ * @name Option constants
+ * These constants are used for the @ref avoptions interface for lswr.
+ * @{
+ *
+ */
+
+#define SWR_FLAG_RESAMPLE 1 ///< Force resampling even if equal sample rate
+//TODO use int resample ?
+//long term TODO can we enable this dynamically?
+
+/** Dithering algorithms */
+enum SwrDitherType {
+    SWR_DITHER_NONE = 0,
+    SWR_DITHER_RECTANGULAR,
+    SWR_DITHER_TRIANGULAR,
+    SWR_DITHER_TRIANGULAR_HIGHPASS,
+
+    SWR_DITHER_NS = 64,         ///< not part of API/ABI
+    SWR_DITHER_NS_LIPSHITZ,
+    SWR_DITHER_NS_F_WEIGHTED,
+    SWR_DITHER_NS_MODIFIED_E_WEIGHTED,
+    SWR_DITHER_NS_IMPROVED_E_WEIGHTED,
+    SWR_DITHER_NS_SHIBATA,
+    SWR_DITHER_NS_LOW_SHIBATA,
+    SWR_DITHER_NS_HIGH_SHIBATA,
+    SWR_DITHER_NB,              ///< not part of API/ABI
+};
+
+/** Resampling Engines */
+enum SwrEngine {
+    SWR_ENGINE_SWR,             /**< SW Resampler */
+    SWR_ENGINE_SOXR,            /**< SoX Resampler */
+    SWR_ENGINE_NB,              ///< not part of API/ABI
+};
+
+/** Resampling Filter Types */
+enum SwrFilterType {
+    SWR_FILTER_TYPE_CUBIC,              /**< Cubic */
+    SWR_FILTER_TYPE_BLACKMAN_NUTTALL,   /**< Blackman Nuttall windowed sinc */
+    SWR_FILTER_TYPE_KAISER,             /**< Kaiser windowed sinc */
+};
+
+/**
+ * @}
+ */
+
+/**
+ * The libswresample context. Unlike libavcodec and libavformat, this structure
+ * is opaque. This means that if you would like to set options, you must use
+ * the @ref avoptions API and cannot directly set values to members of the
+ * structure.
+ */
+typedef struct SwrContext SwrContext;
+
+/**
+ * Get the AVClass for SwrContext. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ * @return the AVClass of SwrContext
+ */
+const AVClass *swr_get_class(void);
+
+/**
+ * @name SwrContext constructor functions
+ * @{
+ */
+
+/**
+ * Allocate SwrContext.
+ *
+ * If you use this function you will need to set the parameters (manually or
+ * with swr_alloc_set_opts2()) before calling swr_init().
+ *
+ * @see swr_alloc_set_opts2(), swr_init(), swr_free()
+ * @return NULL on error, allocated context otherwise
+ */
+struct SwrContext *swr_alloc(void);
+
+/**
+ * Initialize context after user parameters have been set.
+ * @note The context must be configured using the AVOption API.
+ *
+ * @see av_opt_set_int()
+ * @see av_opt_set_dict()
+ *
+ * @param[in,out]   s Swr context to initialize
+ * @return AVERROR error code in case of failure.
+ */
+int swr_init(struct SwrContext *s);
+
+/**
+ * Check whether an swr context has been initialized or not.
+ *
+ * @param[in]       s Swr context to check
+ * @see swr_init()
+ * @return positive if it has been initialized, 0 if not initialized
+ */
+int swr_is_initialized(struct SwrContext *s);
+
+/**
+ * Allocate SwrContext if needed and set/reset common parameters.
+ *
+ * This function does not require *ps to be allocated with swr_alloc(). On the
+ * other hand, swr_alloc() can use swr_alloc_set_opts2() to set the parameters
+ * on the allocated context.
+ *
+ * @param ps              Pointer to an existing Swr context if available, or to NULL if not.
+ *                        On success, *ps will be set to the allocated context.
+ * @param out_ch_layout   output channel layout (e.g. AV_CHANNEL_LAYOUT_*)
+ * @param out_sample_fmt  output sample format (AV_SAMPLE_FMT_*).
+ * @param out_sample_rate output sample rate (frequency in Hz)
+ * @param in_ch_layout    input channel layout (e.g. AV_CHANNEL_LAYOUT_*)
+ * @param in_sample_fmt   input sample format (AV_SAMPLE_FMT_*).
+ * @param in_sample_rate  input sample rate (frequency in Hz)
+ * @param log_offset      logging level offset
+ * @param log_ctx         parent logging context, can be NULL
+ *
+ * @see swr_init(), swr_free()
+ * @return 0 on success, a negative AVERROR code on error.
+ *         On error, the Swr context is freed and *ps set to NULL.
+ */
+int swr_alloc_set_opts2(struct SwrContext **ps,
+                        const AVChannelLayout *out_ch_layout, enum AVSampleFormat out_sample_fmt, int out_sample_rate,
+                        const AVChannelLayout *in_ch_layout, enum AVSampleFormat  in_sample_fmt, int  in_sample_rate,
+                        int log_offset, void *log_ctx);
+/**
+ * @}
+ *
+ * @name SwrContext destructor functions
+ * @{
+ */
+
+/**
+ * Free the given SwrContext and set the pointer to NULL.
+ *
+ * @param[in] s a pointer to a pointer to Swr context
+ */
+void swr_free(struct SwrContext **s);
+
+/**
+ * Closes the context so that swr_is_initialized() returns 0.
+ *
+ * The context can be brought back to life by running swr_init(),
+ * swr_init() can also be used without swr_close().
+ * This function is mainly provided for simplifying the usecase
+ * where one tries to support libavresample and libswresample.
+ *
+ * @param[in,out] s Swr context to be closed
+ */
+void swr_close(struct SwrContext *s);
+
+/**
+ * @}
+ *
+ * @name Core conversion functions
+ * @{
+ */
+
+/** Convert audio.
+ *
+ * in and in_count can be set to 0 to flush the last few samples out at the
+ * end.
+ *
+ * If more input is provided than output space, then the input will be buffered.
+ * You can avoid this buffering by using swr_get_out_samples() to retrieve an
+ * upper bound on the required number of output samples for the given number of
+ * input samples. Conversion will run directly without copying whenever possible.
+ *
+ * @param s         allocated Swr context, with parameters set
+ * @param out       output buffers, only the first one need be set in case of packed audio
+ * @param out_count amount of space available for output in samples per channel
+ * @param in        input buffers, only the first one need to be set in case of packed audio
+ * @param in_count  number of input samples available in one channel
+ *
+ * @return number of samples output per channel, negative value on error
+ */
+int swr_convert(struct SwrContext *s, uint8_t * const *out, int out_count,
+                                const uint8_t * const *in , int in_count);
+
+/**
+ * Convert the next timestamp from input to output
+ * timestamps are in 1/(in_sample_rate * out_sample_rate) units.
+ *
+ * @note There are 2 slightly differently behaving modes.
+ *       @li When automatic timestamp compensation is not used, (min_compensation >= FLT_MAX)
+ *              in this case timestamps will be passed through with delays compensated
+ *       @li When automatic timestamp compensation is used, (min_compensation < FLT_MAX)
+ *              in this case the output timestamps will match output sample numbers.
+ *              See ffmpeg-resampler(1) for the two modes of compensation.
+ *
+ * @param[in] s     initialized Swr context
+ * @param[in] pts   timestamp for the next input sample, INT64_MIN if unknown
+ * @see swr_set_compensation(), swr_drop_output(), and swr_inject_silence() are
+ *      function used internally for timestamp compensation.
+ * @return the output timestamp for the next output sample
+ */
+int64_t swr_next_pts(struct SwrContext *s, int64_t pts);
+
+/**
+ * @}
+ *
+ * @name Low-level option setting functions
+ * These functons provide a means to set low-level options that is not possible
+ * with the AVOption API.
+ * @{
+ */
+
+/**
+ * Activate resampling compensation ("soft" compensation). This function is
+ * internally called when needed in swr_next_pts().
+ *
+ * @param[in,out] s             allocated Swr context. If it is not initialized,
+ *                              or SWR_FLAG_RESAMPLE is not set, swr_init() is
+ *                              called with the flag set.
+ * @param[in]     sample_delta  delta in PTS per sample
+ * @param[in]     compensation_distance number of samples to compensate for
+ * @return    >= 0 on success, AVERROR error codes if:
+ *            @li @c s is NULL,
+ *            @li @c compensation_distance is less than 0,
+ *            @li @c compensation_distance is 0 but sample_delta is not,
+ *            @li compensation unsupported by resampler, or
+ *            @li swr_init() fails when called.
+ */
+int swr_set_compensation(struct SwrContext *s, int sample_delta, int compensation_distance);
+
+/**
+ * Set a customized input channel mapping.
+ *
+ * @param[in,out] s           allocated Swr context, not yet initialized
+ * @param[in]     channel_map customized input channel mapping (array of channel
+ *                            indexes, -1 for a muted channel)
+ * @return >= 0 on success, or AVERROR error code in case of failure.
+ */
+int swr_set_channel_mapping(struct SwrContext *s, const int *channel_map);
+
+/**
+ * Generate a channel mixing matrix.
+ *
+ * This function is the one used internally by libswresample for building the
+ * default mixing matrix. It is made public just as a utility function for
+ * building custom matrices.
+ *
+ * @param in_layout           input channel layout
+ * @param out_layout          output channel layout
+ * @param center_mix_level    mix level for the center channel
+ * @param surround_mix_level  mix level for the surround channel(s)
+ * @param lfe_mix_level       mix level for the low-frequency effects channel
+ * @param rematrix_maxval     if 1.0, coefficients will be normalized to prevent
+ *                            overflow. if INT_MAX, coefficients will not be
+ *                            normalized.
+ * @param[out] matrix         mixing coefficients; matrix[i + stride * o] is
+ *                            the weight of input channel i in output channel o.
+ * @param stride              distance between adjacent input channels in the
+ *                            matrix array
+ * @param matrix_encoding     matrixed stereo downmix mode (e.g. dplii)
+ * @param log_ctx             parent logging context, can be NULL
+ * @return                    0 on success, negative AVERROR code on failure
+ */
+int swr_build_matrix2(const AVChannelLayout *in_layout, const AVChannelLayout *out_layout,
+                      double center_mix_level, double surround_mix_level,
+                      double lfe_mix_level, double maxval,
+                      double rematrix_volume, double *matrix,
+                      ptrdiff_t stride, enum AVMatrixEncoding matrix_encoding,
+                      void *log_context);
+
+/**
+ * Set a customized remix matrix.
+ *
+ * @param s       allocated Swr context, not yet initialized
+ * @param matrix  remix coefficients; matrix[i + stride * o] is
+ *                the weight of input channel i in output channel o
+ * @param stride  offset between lines of the matrix
+ * @return  >= 0 on success, or AVERROR error code in case of failure.
+ */
+int swr_set_matrix(struct SwrContext *s, const double *matrix, int stride);
+
+/**
+ * @}
+ *
+ * @name Sample handling functions
+ * @{
+ */
+
+/**
+ * Drops the specified number of output samples.
+ *
+ * This function, along with swr_inject_silence(), is called by swr_next_pts()
+ * if needed for "hard" compensation.
+ *
+ * @param s     allocated Swr context
+ * @param count number of samples to be dropped
+ *
+ * @return >= 0 on success, or a negative AVERROR code on failure
+ */
+int swr_drop_output(struct SwrContext *s, int count);
+
+/**
+ * Injects the specified number of silence samples.
+ *
+ * This function, along with swr_drop_output(), is called by swr_next_pts()
+ * if needed for "hard" compensation.
+ *
+ * @param s     allocated Swr context
+ * @param count number of samples to be dropped
+ *
+ * @return >= 0 on success, or a negative AVERROR code on failure
+ */
+int swr_inject_silence(struct SwrContext *s, int count);
+
+/**
+ * Gets the delay the next input sample will experience relative to the next output sample.
+ *
+ * Swresample can buffer data if more input has been provided than available
+ * output space, also converting between sample rates needs a delay.
+ * This function returns the sum of all such delays.
+ * The exact delay is not necessarily an integer value in either input or
+ * output sample rate. Especially when downsampling by a large value, the
+ * output sample rate may be a poor choice to represent the delay, similarly
+ * for upsampling and the input sample rate.
+ *
+ * @param s     swr context
+ * @param base  timebase in which the returned delay will be:
+ *              @li if it's set to 1 the returned delay is in seconds
+ *              @li if it's set to 1000 the returned delay is in milliseconds
+ *              @li if it's set to the input sample rate then the returned
+ *                  delay is in input samples
+ *              @li if it's set to the output sample rate then the returned
+ *                  delay is in output samples
+ *              @li if it's the least common multiple of in_sample_rate and
+ *                  out_sample_rate then an exact rounding-free delay will be
+ *                  returned
+ * @returns     the delay in 1 / @c base units.
+ */
+int64_t swr_get_delay(struct SwrContext *s, int64_t base);
+
+/**
+ * Find an upper bound on the number of samples that the next swr_convert
+ * call will output, if called with in_samples of input samples. This
+ * depends on the internal state, and anything changing the internal state
+ * (like further swr_convert() calls) will may change the number of samples
+ * swr_get_out_samples() returns for the same number of input samples.
+ *
+ * @param in_samples    number of input samples.
+ * @note any call to swr_inject_silence(), swr_convert(), swr_next_pts()
+ *       or swr_set_compensation() invalidates this limit
+ * @note it is recommended to pass the correct available buffer size
+ *       to all functions like swr_convert() even if swr_get_out_samples()
+ *       indicates that less would be used.
+ * @returns an upper bound on the number of samples that the next swr_convert
+ *          will output or a negative value to indicate an error
+ */
+int swr_get_out_samples(struct SwrContext *s, int in_samples);
+
+/**
+ * @}
+ *
+ * @name Configuration accessors
+ * @{
+ */
+
+/**
+ * Return the @ref LIBSWRESAMPLE_VERSION_INT constant.
+ *
+ * This is useful to check if the build-time libswresample has the same version
+ * as the run-time one.
+ *
+ * @returns     the unsigned int-typed version
+ */
+unsigned swresample_version(void);
+
+/**
+ * Return the swr build-time configuration.
+ *
+ * @returns     the build-time @c ./configure flags
+ */
+const char *swresample_configuration(void);
+
+/**
+ * Return the swr license.
+ *
+ * @returns     the license of libswresample, determined at build-time
+ */
+const char *swresample_license(void);
+
+/**
+ * @}
+ *
+ * @name AVFrame based API
+ * @{
+ */
+
+/**
+ * Convert the samples in the input AVFrame and write them to the output AVFrame.
+ *
+ * Input and output AVFrames must have channel_layout, sample_rate and format set.
+ *
+ * If the output AVFrame does not have the data pointers allocated the nb_samples
+ * field will be set using av_frame_get_buffer()
+ * is called to allocate the frame.
+ *
+ * The output AVFrame can be NULL or have fewer allocated samples than required.
+ * In this case, any remaining samples not written to the output will be added
+ * to an internal FIFO buffer, to be returned at the next call to this function
+ * or to swr_convert().
+ *
+ * If converting sample rate, there may be data remaining in the internal
+ * resampling delay buffer. swr_get_delay() tells the number of
+ * remaining samples. To get this data as output, call this function or
+ * swr_convert() with NULL input.
+ *
+ * If the SwrContext configuration does not match the output and
+ * input AVFrame settings the conversion does not take place and depending on
+ * which AVFrame is not matching AVERROR_OUTPUT_CHANGED, AVERROR_INPUT_CHANGED
+ * or the result of a bitwise-OR of them is returned.
+ *
+ * @see swr_delay()
+ * @see swr_convert()
+ * @see swr_get_delay()
+ *
+ * @param swr             audio resample context
+ * @param output          output AVFrame
+ * @param input           input AVFrame
+ * @return                0 on success, AVERROR on failure or nonmatching
+ *                        configuration.
+ */
+int swr_convert_frame(SwrContext *swr,
+                      AVFrame *output, const AVFrame *input);
+
+/**
+ * Configure or reconfigure the SwrContext using the information
+ * provided by the AVFrames.
+ *
+ * The original resampling context is reset even on failure.
+ * The function calls swr_close() internally if the context is open.
+ *
+ * @see swr_close();
+ *
+ * @param swr             audio resample context
+ * @param out             output AVFrame
+ * @param in              input AVFrame
+ * @return                0 on success, AVERROR on failure.
+ */
+int swr_config_frame(SwrContext *swr, const AVFrame *out, const AVFrame *in);
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* SWRESAMPLE_SWRESAMPLE_H */

ffmpeg/include/libswresample/version.h

@@ -0,0 +1,46 @@
+/*
+ * Version macros.
+ *
+ * This file is part of libswresample
+ *
+ * libswresample 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.
+ *
+ * libswresample 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 libswresample; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef SWRESAMPLE_VERSION_H
+#define SWRESAMPLE_VERSION_H
+
+/**
+ * @file
+ * Libswresample version macros
+ */
+
+#include "libavutil/version.h"
+
+#include "version_major.h"
+
+#define LIBSWRESAMPLE_VERSION_MINOR   4
+#define LIBSWRESAMPLE_VERSION_MICRO 100
+
+#define LIBSWRESAMPLE_VERSION_INT  AV_VERSION_INT(LIBSWRESAMPLE_VERSION_MAJOR, \
+                                                  LIBSWRESAMPLE_VERSION_MINOR, \
+                                                  LIBSWRESAMPLE_VERSION_MICRO)
+#define LIBSWRESAMPLE_VERSION      AV_VERSION(LIBSWRESAMPLE_VERSION_MAJOR, \
+                                              LIBSWRESAMPLE_VERSION_MINOR, \
+                                              LIBSWRESAMPLE_VERSION_MICRO)
+#define LIBSWRESAMPLE_BUILD        LIBSWRESAMPLE_VERSION_INT
+
+#define LIBSWRESAMPLE_IDENT        "SwR" AV_STRINGIFY(LIBSWRESAMPLE_VERSION)
+
+#endif /* SWRESAMPLE_VERSION_H */

ffmpeg/include/libswresample/version_major.h

@@ -0,0 +1,31 @@
+/*
+ * Version macros.
+ *
+ * This file is part of libswresample
+ *
+ * libswresample 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.
+ *
+ * libswresample 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 libswresample; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef SWRESAMPLE_VERSION_MAJOR_H
+#define SWRESAMPLE_VERSION_MAJOR_H
+
+/**
+ * @file
+ * Libswresample version macros
+ */
+
+#define LIBSWRESAMPLE_VERSION_MAJOR   5
+
+#endif /* SWRESAMPLE_VERSION_MAJOR_H */

ffmpeg/include/libswscale/swscale.h

@@ -0,0 +1,683 @@
+/*
+ * Copyright (C) 2024 Niklas Haas
+ * Copyright (C) 2001-2011 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 SWSCALE_SWSCALE_H
+#define SWSCALE_SWSCALE_H
+
+/**
+ * @file
+ * @ingroup libsws
+ * external API header
+ */
+
+#include <stdint.h>
+
+#include "libavutil/avutil.h"
+#include "libavutil/frame.h"
+#include "libavutil/log.h"
+#include "libavutil/pixfmt.h"
+#include "version_major.h"
+#ifndef HAVE_AV_CONFIG_H
+/* When included as part of the ffmpeg build, only include the major version
+ * to avoid unnecessary rebuilds. When included externally, keep including
+ * the full version information. */
+#include "version.h"
+#endif
+
+/**
+ * @defgroup libsws libswscale
+ * Color conversion and scaling library.
+ *
+ * @{
+ *
+ * Return the LIBSWSCALE_VERSION_INT constant.
+ */
+unsigned swscale_version(void);
+
+/**
+ * Return the libswscale build-time configuration.
+ */
+const char *swscale_configuration(void);
+
+/**
+ * Return the libswscale license.
+ */
+const char *swscale_license(void);
+
+/**
+ * Get the AVClass for SwsContext. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass *sws_get_class(void);
+
+/******************************
+ * Flags and quality settings *
+ ******************************/
+
+typedef enum SwsDither {
+    SWS_DITHER_NONE = 0, /* disable dithering */
+    SWS_DITHER_AUTO,     /* auto-select from preset */
+    SWS_DITHER_BAYER,    /* ordered dither matrix */
+    SWS_DITHER_ED,       /* error diffusion */
+    SWS_DITHER_A_DITHER, /* arithmetic addition */
+    SWS_DITHER_X_DITHER, /* arithmetic xor */
+    SWS_DITHER_NB,       /* not part of the ABI */
+} SwsDither;
+
+typedef enum SwsAlphaBlend {
+    SWS_ALPHA_BLEND_NONE = 0,
+    SWS_ALPHA_BLEND_UNIFORM,
+    SWS_ALPHA_BLEND_CHECKERBOARD,
+    SWS_ALPHA_BLEND_NB,  /* not part of the ABI */
+} SwsAlphaBlend;
+
+typedef enum SwsFlags {
+    /**
+     * Scaler selection options. Only one may be active at a time.
+     */
+    SWS_FAST_BILINEAR = 1 <<  0, ///< fast bilinear filtering
+    SWS_BILINEAR      = 1 <<  1, ///< bilinear filtering
+    SWS_BICUBIC       = 1 <<  2, ///< 2-tap cubic B-spline
+    SWS_X             = 1 <<  3, ///< experimental
+    SWS_POINT         = 1 <<  4, ///< nearest neighbor
+    SWS_AREA          = 1 <<  5, ///< area averaging
+    SWS_BICUBLIN      = 1 <<  6, ///< bicubic luma, bilinear chroma
+    SWS_GAUSS         = 1 <<  7, ///< gaussian approximation
+    SWS_SINC          = 1 <<  8, ///< unwindowed sinc
+    SWS_LANCZOS       = 1 <<  9, ///< 3-tap sinc/sinc
+    SWS_SPLINE        = 1 << 10, ///< cubic Keys spline
+
+    /**
+     * Return an error on underspecified conversions. Without this flag,
+     * unspecified fields are defaulted to sensible values.
+     */
+    SWS_STRICT        = 1 << 11,
+
+    /**
+     * Emit verbose log of scaling parameters.
+     */
+    SWS_PRINT_INFO    = 1 << 12,
+
+    /**
+     * Perform full chroma upsampling when upscaling to RGB.
+     *
+     * For example, when converting 50x50 yuv420p to 100x100 rgba, setting this flag
+     * will scale the chroma plane from 25x25 to 100x100 (4:4:4), and then convert
+     * the 100x100 yuv444p image to rgba in the final output step.
+     *
+     * Without this flag, the chroma plane is instead scaled to 50x100 (4:2:2),
+     * with a single chroma sample being re-used for both of the horizontally
+     * adjacent RGBA output pixels.
+     */
+    SWS_FULL_CHR_H_INT = 1 << 13,
+
+    /**
+     * Perform full chroma interpolation when downscaling RGB sources.
+     *
+     * For example, when converting a 100x100 rgba source to 50x50 yuv444p, setting
+     * this flag will generate a 100x100 (4:4:4) chroma plane, which is then
+     * downscaled to the required 50x50.
+     *
+     * Without this flag, the chroma plane is instead generated at 50x100 (dropping
+     * every other pixel), before then being downscaled to the required 50x50
+     * resolution.
+     */
+    SWS_FULL_CHR_H_INP = 1 << 14,
+
+    /**
+     * Force bit-exact output. This will prevent the use of platform-specific
+     * optimizations that may lead to slight difference in rounding, in favor
+     * of always maintaining exact bit output compatibility with the reference
+     * C code.
+     *
+     * Note: It is recommended to set both of these flags simultaneously.
+     */
+    SWS_ACCURATE_RND   = 1 << 18,
+    SWS_BITEXACT       = 1 << 19,
+
+    /**
+     * Deprecated flags.
+     */
+    SWS_DIRECT_BGR      = 1 << 15, ///< This flag has no effect
+    SWS_ERROR_DIFFUSION = 1 << 23, ///< Set `SwsContext.dither` instead
+} SwsFlags;
+
+typedef enum SwsIntent {
+    SWS_INTENT_PERCEPTUAL = 0,            ///< Perceptual tone mapping
+    SWS_INTENT_RELATIVE_COLORIMETRIC = 1, ///< Relative colorimetric clipping
+    SWS_INTENT_SATURATION = 2,            ///< Saturation mapping
+    SWS_INTENT_ABSOLUTE_COLORIMETRIC = 3, ///< Absolute colorimetric clipping
+    SWS_INTENT_NB, ///< not part of the ABI
+} SwsIntent;
+
+/***********************************
+ * Context creation and management *
+ ***********************************/
+
+/**
+ * Main external API structure. New fields can be added to the end with
+ * minor version bumps. Removal, reordering and changes to existing fields
+ * require a major version bump. sizeof(SwsContext) is not part of the ABI.
+ */
+typedef struct SwsContext {
+    const AVClass *av_class;
+
+    /**
+     * Private data of the user, can be used to carry app specific stuff.
+     */
+    void *opaque;
+
+    /**
+     * Bitmask of SWS_*. See `SwsFlags` for details.
+     */
+    unsigned flags;
+
+    /**
+     * Extra parameters for fine-tuning certain scalers.
+     */
+    double scaler_params[2];
+
+    /**
+     * How many threads to use for processing, or 0 for automatic selection.
+     */
+    int threads;
+
+    /**
+     * Dither mode.
+     */
+    SwsDither dither;
+
+    /**
+     * Alpha blending mode. See `SwsAlphaBlend` for details.
+     */
+    SwsAlphaBlend alpha_blend;
+
+    /**
+     * Use gamma correct scaling.
+     */
+    int gamma_flag;
+
+    /**
+     * Deprecated frame property overrides, for the legacy API only.
+     *
+     * Ignored by sws_scale_frame() when used in dynamic mode, in which
+     * case all properties are instead taken from the frame directly.
+     */
+    int src_w, src_h;  ///< Width and height of the source frame
+    int dst_w, dst_h;  ///< Width and height of the destination frame
+    int src_format;    ///< Source pixel format
+    int dst_format;    ///< Destination pixel format
+    int src_range;     ///< Source is full range
+    int dst_range;     ///< Destination is full range
+    int src_v_chr_pos; ///< Source vertical chroma position in luma grid / 256
+    int src_h_chr_pos; ///< Source horizontal chroma position
+    int dst_v_chr_pos; ///< Destination vertical chroma position
+    int dst_h_chr_pos; ///< Destination horizontal chroma position
+
+    /**
+     * Desired ICC intent for color space conversions.
+     */
+    int intent;
+
+    /* Remember to add new fields to graph.c:opts_equal() */
+} SwsContext;
+
+/**
+ * Allocate an empty SwsContext and set its fields to default values.
+ */
+SwsContext *sws_alloc_context(void);
+
+/**
+ * Free the context and everything associated with it, and write NULL
+ * to the provided pointer.
+ */
+void sws_free_context(SwsContext **ctx);
+
+/***************************
+ * Supported frame formats *
+ ***************************/
+
+/**
+ * Test if a given pixel format is supported.
+ *
+ * @param output  If 0, test if compatible with the source/input frame;
+ *                otherwise, with the destination/output frame.
+ * @param format  The format to check.
+ *
+ * @return A positive integer if supported, 0 otherwise.
+ */
+int sws_test_format(enum AVPixelFormat format, int output);
+
+/**
+ * Test if a given color space is supported.
+ *
+ * @param output  If 0, test if compatible with the source/input frame;
+ *                otherwise, with the destination/output frame.
+ * @param colorspace The colorspace to check.
+ *
+ * @return A positive integer if supported, 0 otherwise.
+ */
+int sws_test_colorspace(enum AVColorSpace colorspace, int output);
+
+/**
+ * Test if a given set of color primaries is supported.
+ *
+ * @param output  If 0, test if compatible with the source/input frame;
+ *                otherwise, with the destination/output frame.
+ * @param primaries The color primaries to check.
+ *
+ * @return A positive integer if supported, 0 otherwise.
+ */
+int sws_test_primaries(enum AVColorPrimaries primaries, int output);
+
+/**
+ * Test if a given color transfer function is supported.
+ *
+ * @param output  If 0, test if compatible with the source/input frame;
+ *                otherwise, with the destination/output frame.
+ * @param trc     The color transfer function to check.
+ *
+ * @return A positive integer if supported, 0 otherwise.
+ */
+int sws_test_transfer(enum AVColorTransferCharacteristic trc, int output);
+
+/**
+ * Helper function to run all sws_test_* against a frame, as well as testing
+ * the basic frame properties for sanity. Ignores irrelevant properties - for
+ * example, AVColorSpace is not checked for RGB frames.
+ */
+int sws_test_frame(const AVFrame *frame, int output);
+
+/**
+ * Like `sws_scale_frame`, but without actually scaling. It will instead
+ * merely initialize internal state that *would* be required to perform the
+ * operation, as well as returning the correct error code for unsupported
+ * frame combinations.
+ *
+ * @param ctx   The scaling context.
+ * @param dst   The destination frame to consider.
+ * @param src   The source frame to consider.
+ * @return 0 on success, a negative AVERROR code on failure.
+ */
+int sws_frame_setup(SwsContext *ctx, const AVFrame *dst, const AVFrame *src);
+
+/********************
+ * Main scaling API *
+ ********************/
+
+/**
+ * Check if a given conversion is a noop. Returns a positive integer if
+ * no operation needs to be performed, 0 otherwise.
+ */
+int sws_is_noop(const AVFrame *dst, const AVFrame *src);
+
+/**
+ * Scale source data from `src` and write the output to `dst`.
+ *
+ * This function can be used directly on an allocated context, without setting
+ * up any frame properties or calling `sws_init_context()`. Such usage is fully
+ * dynamic and does not require reallocation if the frame properties change.
+ *
+ * Alternatively, this function can be called on a context that has been
+ * explicitly initialized. However, this is provided only for backwards
+ * compatibility. In this usage mode, all frame properties must be correctly
+ * set at init time, and may no longer change after initialization.
+ *
+ * @param ctx   The scaling context.
+ * @param dst   The destination frame. The data buffers may either be already
+ *              allocated by the caller or left clear, in which case they will
+ *              be allocated by the scaler. The latter may have performance
+ *              advantages - e.g. in certain cases some (or all) output planes
+ *              may be references to input planes, rather than copies.
+ * @param src   The source frame. If the data buffers are set to NULL, then
+ *              this function behaves identically to `sws_frame_setup`.
+ * @return >= 0 on success, a negative AVERROR code on failure.
+ */
+int sws_scale_frame(SwsContext *c, AVFrame *dst, const AVFrame *src);
+
+/*************************
+ * Legacy (stateful) API *
+ *************************/
+
+#define SWS_SRC_V_CHR_DROP_MASK     0x30000
+#define SWS_SRC_V_CHR_DROP_SHIFT    16
+
+#define SWS_PARAM_DEFAULT           123456
+
+#define SWS_MAX_REDUCE_CUTOFF 0.002
+
+#define SWS_CS_ITU709         1
+#define SWS_CS_FCC            4
+#define SWS_CS_ITU601         5
+#define SWS_CS_ITU624         5
+#define SWS_CS_SMPTE170M      5
+#define SWS_CS_SMPTE240M      7
+#define SWS_CS_DEFAULT        5
+#define SWS_CS_BT2020         9
+
+/**
+ * Return a pointer to yuv<->rgb coefficients for the given colorspace
+ * suitable for sws_setColorspaceDetails().
+ *
+ * @param colorspace One of the SWS_CS_* macros. If invalid,
+ * SWS_CS_DEFAULT is used.
+ */
+const int *sws_getCoefficients(int colorspace);
+
+// when used for filters they must have an odd number of elements
+// coeffs cannot be shared between vectors
+typedef struct SwsVector {
+    double *coeff;              ///< pointer to the list of coefficients
+    int length;                 ///< number of coefficients in the vector
+} SwsVector;
+
+// vectors can be shared
+typedef struct SwsFilter {
+    SwsVector *lumH;
+    SwsVector *lumV;
+    SwsVector *chrH;
+    SwsVector *chrV;
+} SwsFilter;
+
+/**
+ * Return a positive value if pix_fmt is a supported input format, 0
+ * otherwise.
+ */
+int sws_isSupportedInput(enum AVPixelFormat pix_fmt);
+
+/**
+ * Return a positive value if pix_fmt is a supported output format, 0
+ * otherwise.
+ */
+int sws_isSupportedOutput(enum AVPixelFormat pix_fmt);
+
+/**
+ * @param[in]  pix_fmt the pixel format
+ * @return a positive value if an endianness conversion for pix_fmt is
+ * supported, 0 otherwise.
+ */
+int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt);
+
+/**
+ * Initialize the swscaler context sws_context.
+ *
+ * This function is considered deprecated, and provided only for backwards
+ * compatibility with sws_scale() and sws_start_frame(). The preferred way to
+ * use libswscale is to set all frame properties correctly and call
+ * sws_scale_frame() directly, without explicitly initializing the context.
+ *
+ * @return zero or positive value on success, a negative value on
+ * error
+ */
+av_warn_unused_result
+int sws_init_context(SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter);
+
+/**
+ * Free the swscaler context swsContext.
+ * If swsContext is NULL, then does nothing.
+ */
+void sws_freeContext(SwsContext *swsContext);
+
+/**
+ * Allocate and return an SwsContext. You need it to perform
+ * scaling/conversion operations using sws_scale().
+ *
+ * @param srcW the width of the source image
+ * @param srcH the height of the source image
+ * @param srcFormat the source image format
+ * @param dstW the width of the destination image
+ * @param dstH the height of the destination image
+ * @param dstFormat the destination image format
+ * @param flags specify which algorithm and options to use for rescaling
+ * @param param extra parameters to tune the used scaler
+ *              For SWS_BICUBIC param[0] and [1] tune the shape of the basis
+ *              function, param[0] tunes f(1) and param[1] f´(1)
+ *              For SWS_GAUSS param[0] tunes the exponent and thus cutoff
+ *              frequency
+ *              For SWS_LANCZOS param[0] tunes the width of the window function
+ * @return a pointer to an allocated context, or NULL in case of error
+ * @note this function is to be removed after a saner alternative is
+ *       written
+ */
+SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
+                           int dstW, int dstH, enum AVPixelFormat dstFormat,
+                           int flags, SwsFilter *srcFilter,
+                           SwsFilter *dstFilter, const double *param);
+
+/**
+ * Scale the image slice in srcSlice and put the resulting scaled
+ * slice in the image in dst. A slice is a sequence of consecutive
+ * rows in an image. Requires a context that has been previously
+ * been initialized with sws_init_context().
+ *
+ * Slices have to be provided in sequential order, either in
+ * top-bottom or bottom-top order. If slices are provided in
+ * non-sequential order the behavior of the function is undefined.
+ *
+ * @param c         the scaling context previously created with
+ *                  sws_getContext()
+ * @param srcSlice  the array containing the pointers to the planes of
+ *                  the source slice
+ * @param srcStride the array containing the strides for each plane of
+ *                  the source image
+ * @param srcSliceY the position in the source image of the slice to
+ *                  process, that is the number (counted starting from
+ *                  zero) in the image of the first row of the slice
+ * @param srcSliceH the height of the source slice, that is the number
+ *                  of rows in the slice
+ * @param dst       the array containing the pointers to the planes of
+ *                  the destination image
+ * @param dstStride the array containing the strides for each plane of
+ *                  the destination image
+ * @return          the height of the output slice
+ */
+int sws_scale(SwsContext *c, const uint8_t *const srcSlice[],
+              const int srcStride[], int srcSliceY, int srcSliceH,
+              uint8_t *const dst[], const int dstStride[]);
+
+/**
+ * Initialize the scaling process for a given pair of source/destination frames.
+ * Must be called before any calls to sws_send_slice() and sws_receive_slice().
+ * Requires a context that has been previously been initialized with
+ * sws_init_context().
+ *
+ * This function will retain references to src and dst, so they must both use
+ * refcounted buffers (if allocated by the caller, in case of dst).
+ *
+ * @param c   The scaling context
+ * @param dst The destination frame.
+ *
+ *            The data buffers may either be already allocated by the caller or
+ *            left clear, in which case they will be allocated by the scaler.
+ *            The latter may have performance advantages - e.g. in certain cases
+ *            some output planes may be references to input planes, rather than
+ *            copies.
+ *
+ *            Output data will be written into this frame in successful
+ *            sws_receive_slice() calls.
+ * @param src The source frame. The data buffers must be allocated, but the
+ *            frame data does not have to be ready at this point. Data
+ *            availability is then signalled by sws_send_slice().
+ * @return 0 on success, a negative AVERROR code on failure
+ *
+ * @see sws_frame_end()
+ */
+int sws_frame_start(SwsContext *c, AVFrame *dst, const AVFrame *src);
+
+/**
+ * Finish the scaling process for a pair of source/destination frames previously
+ * submitted with sws_frame_start(). Must be called after all sws_send_slice()
+ * and sws_receive_slice() calls are done, before any new sws_frame_start()
+ * calls.
+ *
+ * @param c   The scaling context
+ */
+void sws_frame_end(SwsContext *c);
+
+/**
+ * Indicate that a horizontal slice of input data is available in the source
+ * frame previously provided to sws_frame_start(). The slices may be provided in
+ * any order, but may not overlap. For vertically subsampled pixel formats, the
+ * slices must be aligned according to subsampling.
+ *
+ * @param c   The scaling context
+ * @param slice_start first row of the slice
+ * @param slice_height number of rows in the slice
+ *
+ * @return a non-negative number on success, a negative AVERROR code on failure.
+ */
+int sws_send_slice(SwsContext *c, unsigned int slice_start,
+                   unsigned int slice_height);
+
+/**
+ * Request a horizontal slice of the output data to be written into the frame
+ * previously provided to sws_frame_start().
+ *
+ * @param c   The scaling context
+ * @param slice_start first row of the slice; must be a multiple of
+ *                    sws_receive_slice_alignment()
+ * @param slice_height number of rows in the slice; must be a multiple of
+ *                     sws_receive_slice_alignment(), except for the last slice
+ *                     (i.e. when slice_start+slice_height is equal to output
+ *                     frame height)
+ *
+ * @return a non-negative number if the data was successfully written into the output
+ *         AVERROR(EAGAIN) if more input data needs to be provided before the
+ *                         output can be produced
+ *         another negative AVERROR code on other kinds of scaling failure
+ */
+int sws_receive_slice(SwsContext *c, unsigned int slice_start,
+                      unsigned int slice_height);
+
+/**
+ * Get the alignment required for slices. Requires a context that has been
+ * previously been initialized with sws_init_context().
+ *
+ * @param c   The scaling context
+ * @return alignment required for output slices requested with sws_receive_slice().
+ *         Slice offsets and sizes passed to sws_receive_slice() must be
+ *         multiples of the value returned from this function.
+ */
+unsigned int sws_receive_slice_alignment(const SwsContext *c);
+
+/**
+ * @param c the scaling context
+ * @param dstRange flag indicating the while-black range of the output (1=jpeg / 0=mpeg)
+ * @param srcRange flag indicating the while-black range of the input (1=jpeg / 0=mpeg)
+ * @param table the yuv2rgb coefficients describing the output yuv space, normally ff_yuv2rgb_coeffs[x]
+ * @param inv_table the yuv2rgb coefficients describing the input yuv space, normally ff_yuv2rgb_coeffs[x]
+ * @param brightness 16.16 fixed point brightness correction
+ * @param contrast 16.16 fixed point contrast correction
+ * @param saturation 16.16 fixed point saturation correction
+ *
+ * @return A negative error code on error, non negative otherwise.
+ *         If `LIBSWSCALE_VERSION_MAJOR < 7`, returns -1 if not supported.
+ */
+int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4],
+                             int srcRange, const int table[4], int dstRange,
+                             int brightness, int contrast, int saturation);
+
+/**
+ * @return A negative error code on error, non negative otherwise.
+ *         If `LIBSWSCALE_VERSION_MAJOR < 7`, returns -1 if not supported.
+ */
+int sws_getColorspaceDetails(SwsContext *c, int **inv_table,
+                             int *srcRange, int **table, int *dstRange,
+                             int *brightness, int *contrast, int *saturation);
+
+/**
+ * Allocate and return an uninitialized vector with length coefficients.
+ */
+SwsVector *sws_allocVec(int length);
+
+/**
+ * Return a normalized Gaussian curve used to filter stuff
+ * quality = 3 is high quality, lower is lower quality.
+ */
+SwsVector *sws_getGaussianVec(double variance, double quality);
+
+/**
+ * Scale all the coefficients of a by the scalar value.
+ */
+void sws_scaleVec(SwsVector *a, double scalar);
+
+/**
+ * Scale all the coefficients of a so that their sum equals height.
+ */
+void sws_normalizeVec(SwsVector *a, double height);
+
+void sws_freeVec(SwsVector *a);
+
+SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
+                                float lumaSharpen, float chromaSharpen,
+                                float chromaHShift, float chromaVShift,
+                                int verbose);
+void sws_freeFilter(SwsFilter *filter);
+
+/**
+ * Check if context can be reused, otherwise reallocate a new one.
+ *
+ * If context is NULL, just calls sws_getContext() to get a new
+ * context. Otherwise, checks if the parameters are the ones already
+ * saved in context. If that is the case, returns the current
+ * context. Otherwise, frees context and gets a new context with
+ * the new parameters.
+ *
+ * Be warned that srcFilter and dstFilter are not checked, they
+ * are assumed to remain the same.
+ */
+SwsContext *sws_getCachedContext(SwsContext *context, int srcW, int srcH,
+                                 enum AVPixelFormat srcFormat, int dstW, int dstH,
+                                 enum AVPixelFormat dstFormat, int flags,
+                                 SwsFilter *srcFilter, SwsFilter *dstFilter,
+                                 const double *param);
+
+/**
+ * Convert an 8-bit paletted frame into a frame with a color depth of 32 bits.
+ *
+ * The output frame will have the same packed format as the palette.
+ *
+ * @param src        source frame buffer
+ * @param dst        destination frame buffer
+ * @param num_pixels number of pixels to convert
+ * @param palette    array with [256] entries, which must match color arrangement (RGB or BGR) of src
+ */
+void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette);
+
+/**
+ * Convert an 8-bit paletted frame into a frame with a color depth of 24 bits.
+ *
+ * With the palette format "ABCD", the destination frame ends up with the format "ABC".
+ *
+ * @param src        source frame buffer
+ * @param dst        destination frame buffer
+ * @param num_pixels number of pixels to convert
+ * @param palette    array with [256] entries, which must match color arrangement (RGB or BGR) of src
+ */
+void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette);
+
+/**
+ * @}
+ */
+
+#endif /* SWSCALE_SWSCALE_H */

ffmpeg/include/libswscale/version.h

@@ -0,0 +1,44 @@
+/*
+ * 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 SWSCALE_VERSION_H
+#define SWSCALE_VERSION_H
+
+/**
+ * @file
+ * swscale version macros
+ */
+
+#include "libavutil/version.h"
+
+#include "version_major.h"
+
+#define LIBSWSCALE_VERSION_MINOR  13
+#define LIBSWSCALE_VERSION_MICRO 100
+
+#define LIBSWSCALE_VERSION_INT  AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
+                                               LIBSWSCALE_VERSION_MINOR, \
+                                               LIBSWSCALE_VERSION_MICRO)
+#define LIBSWSCALE_VERSION      AV_VERSION(LIBSWSCALE_VERSION_MAJOR, \
+                                           LIBSWSCALE_VERSION_MINOR, \
+                                           LIBSWSCALE_VERSION_MICRO)
+#define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT
+
+#define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
+
+#endif /* SWSCALE_VERSION_H */

ffmpeg/include/libswscale/version_major.h

@@ -0,0 +1,35 @@
+/*
+ * 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 SWSCALE_VERSION_MAJOR_H
+#define SWSCALE_VERSION_MAJOR_H
+
+/**
+ * @file
+ * swscale version macros
+ */
+
+#define LIBSWSCALE_VERSION_MAJOR   8
+
+/**
+ * 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.
+ */
+
+#endif /* SWSCALE_VERSION_MAJOR_H */

ffmpeg/lib/pkgconfig/libavcodec.pc

@@ -0,0 +1,13 @@
+prefix=${pcfiledir}/../..
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: libavcodec
+Description: FFmpeg codec library
+Version: 61.31.100
+Requires: 
+Requires.private: libswresample >= 5.4.100, libavutil >= 59.54.101
+Conflicts:
+Libs: -L${libdir}  -lavcodec 
+Cflags: -I${includedir}

ffmpeg/lib/pkgconfig/libavdevice.pc

@@ -0,0 +1,13 @@
+prefix=${pcfiledir}/../..
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: libavdevice
+Description: FFmpeg device handling library
+Version: 61.4.100
+Requires: 
+Requires.private: libavfilter >= 10.6.101, libswscale >= 8.13.100, libpostproc >= 58.4.100, libavformat >= 61.9.104, libavcodec >= 61.31.100, libswresample >= 5.4.100, libavutil >= 59.54.101
+Conflicts:
+Libs: -L${libdir}  -lavdevice 
+Cflags: -I${includedir}

ffmpeg/lib/pkgconfig/libavfilter.pc

@@ -0,0 +1,13 @@
+prefix=${pcfiledir}/../..
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: libavfilter
+Description: FFmpeg audio/video filtering library
+Version: 10.6.101
+Requires: 
+Requires.private: libswscale >= 8.13.100, libpostproc >= 58.4.100, libavformat >= 61.9.104, libavcodec >= 61.31.100, libswresample >= 5.4.100, libavutil >= 59.54.101
+Conflicts:
+Libs: -L${libdir}  -lavfilter 
+Cflags: -I${includedir}

ffmpeg/lib/pkgconfig/libavformat.pc

@@ -0,0 +1,13 @@
+prefix=${pcfiledir}/../..
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: libavformat
+Description: FFmpeg container format library
+Version: 61.9.104
+Requires: 
+Requires.private: libavcodec >= 61.31.100, libswresample >= 5.4.100, libavutil >= 59.54.101
+Conflicts:
+Libs: -L${libdir}  -lavformat 
+Cflags: -I${includedir}

ffmpeg/lib/pkgconfig/libavutil.pc

@@ -0,0 +1,13 @@
+prefix=${pcfiledir}/../..
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: libavutil
+Description: FFmpeg utility library
+Version: 59.54.101
+Requires: 
+Requires.private: 
+Conflicts:
+Libs: -L${libdir}  -lavutil 
+Cflags: -I${includedir}

ffmpeg/lib/pkgconfig/libpostproc.pc

@@ -0,0 +1,13 @@
+prefix=${pcfiledir}/../..
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: libpostproc
+Description: FFmpeg postprocessing library
+Version: 58.4.100
+Requires: 
+Requires.private: libavutil >= 59.54.101
+Conflicts:
+Libs: -L${libdir}  -lpostproc 
+Cflags: -I${includedir}

ffmpeg/lib/pkgconfig/libswresample.pc

@@ -0,0 +1,13 @@
+prefix=${pcfiledir}/../..
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: libswresample
+Description: FFmpeg audio resampling library
+Version: 5.4.100
+Requires: 
+Requires.private: libavutil >= 59.54.101
+Conflicts:
+Libs: -L${libdir}  -lswresample 
+Cflags: -I${includedir}

ffmpeg/lib/pkgconfig/libswscale.pc

@@ -0,0 +1,13 @@
+prefix=${pcfiledir}/../..
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: libswscale
+Description: FFmpeg image rescaling library
+Version: 8.13.100
+Requires: 
+Requires.private: libavutil >= 59.54.101
+Conflicts:
+Libs: -L${libdir}  -lswscale 
+Cflags: -I${includedir}