| /* | |
| * 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 | |
| */ | |
| /** | |
| * @file | |
| * @ingroup libsws | |
| * external API header | |
| */ | |
| /* 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. */ | |
| /** | |
| * @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 * | |
| *************************/ | |
| /** | |
| * 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); | |
| /** | |
| * @} | |
| */ | |