chromium/third_party/ffmpeg/libavutil/imgutils.c

/*
 * 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
 * misc image utilities
 */

#include "avassert.h"
#include "common.h"
#include "imgutils.h"
#include "imgutils_internal.h"
#include "intreadwrite.h"
#include "log.h"
#include "mathematics.h"
#include "mem.h"
#include "pixdesc.h"
#include "rational.h"

void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
                                const AVPixFmtDescriptor *pixdesc)
{ … }

static inline
int image_get_linesize(int width, int plane,
                       int max_step, int max_step_comp,
                       const AVPixFmtDescriptor *desc)
{ … }

int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
{ … }

int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
{ … }

int av_image_fill_plane_sizes(size_t sizes[4], enum AVPixelFormat pix_fmt,
                              int height, const ptrdiff_t linesizes[4])
{ … }

int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height,
                           uint8_t *ptr, const int linesizes[4])
{ … }

int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
{ … }

int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
                   int w, int h, enum AVPixelFormat pix_fmt, int align)
{ … }

ImgUtils;

static const AVClass imgutils_class = …;

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)
{ … }

int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
{ … }

int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
{ … }

static void image_copy_plane(uint8_t       *dst, ptrdiff_t dst_linesize,
                             const uint8_t *src, ptrdiff_t src_linesize,
                             ptrdiff_t bytewidth, int height)
{ … }

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)
{ … }

void av_image_copy_plane(uint8_t       *dst, int dst_linesize,
                         const uint8_t *src, int src_linesize,
                         int bytewidth, int height)
{ … }

static void image_copy(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,
                       void (*copy_plane)(uint8_t *, ptrdiff_t, const uint8_t *,
                                          ptrdiff_t, ptrdiff_t, int))
{ … }

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)
{ … }

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)
{ … }

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)
{ … }

int av_image_get_buffer_size(enum AVPixelFormat pix_fmt,
                             int width, int height, int align)
{ … }

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)
{ … }

// Fill dst[0..dst_size] with the bytes in clear[0..clear_size]. The clear
// bytes are repeated until dst_size is reached. If dst_size is unaligned (i.e.
// dst_size%clear_size!=0), the remaining data will be filled with the beginning
// of the clear data only.
static void memset_bytes(uint8_t *dst, size_t dst_size, uint8_t *clear,
                         size_t clear_size)
{ … }

// Maximum size in bytes of a plane element (usually a pixel, or multiple pixels
// if it's a subsampled packed format).
#define MAX_BLOCK_SIZE …

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)
{ … }

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)
{ … }