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ffmpeg-4.2.2/libswscale/tests/pixdesc_query.c 2.85 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * Copyright (c) 2017 Clément Bœsch <u pkh me>
   *
   * 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
   */
  
  #include <stdlib.h>
  
  #include "libavutil/mem.h"
  #include "libswscale/swscale_internal.h"
  
  static const struct {
      const char *class;
      int (*cond)(enum AVPixelFormat pix_fmt);
  } query_tab[] = {
      {"is16BPS",     is16BPS},
      {"isNBPS",      isNBPS},
      {"isBE",        isBE},
      {"isYUV",       isYUV},
      {"isPlanarYUV", isPlanarYUV},
      {"isSemiPlanarYUV", isSemiPlanarYUV},
      {"isRGB",       isRGB},
      {"Gray",        isGray},
      {"RGBinInt",    isRGBinInt},
      {"BGRinInt",    isBGRinInt},
      {"Bayer",       isBayer},
      {"AnyRGB",      isAnyRGB},
      {"ALPHA",       isALPHA},
      {"Packed",      isPacked},
      {"Planar",      isPlanar},
      {"PackedRGB",   isPackedRGB},
      {"PlanarRGB",   isPlanarRGB},
      {"usePal",      usePal},
  };
  
  static int cmp_str(const void *a, const void *b)
  {
      const char *s1 = *(const char **)a;
      const char *s2 = *(const char **)b;
      return strcmp(s1, s2);
  }
  
  int main(void)
  {
      int i, j;
  
      for (i = 0; i < FF_ARRAY_ELEMS(query_tab); i++) {
          const char **pix_fmts = NULL;
          int nb_pix_fmts = 0;
          const AVPixFmtDescriptor *pix_desc = NULL;
  
          while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
              enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
              if (query_tab[i].cond(pix_fmt)) {
                  const char *pix_name = pix_desc->name;
                  if      (pix_fmt == AV_PIX_FMT_RGB32)   pix_name = "rgb32";
                  else if (pix_fmt == AV_PIX_FMT_RGB32_1) pix_name = "rgb32_1";
                  else if (pix_fmt == AV_PIX_FMT_BGR32)   pix_name = "bgr32";
                  else if (pix_fmt == AV_PIX_FMT_BGR32_1) pix_name = "bgr32_1";
  
                  av_dynarray_add(&pix_fmts, &nb_pix_fmts, (void *)pix_name);
              }
          }
  
          if (pix_fmts) {
              qsort(pix_fmts, nb_pix_fmts, sizeof(*pix_fmts), cmp_str);
  
              printf("%s:\n", query_tab[i].class);
              for (j = 0; j < nb_pix_fmts; j++)
                  printf("  %s\n", pix_fmts[j]);
              printf("\n");
  
              av_free(pix_fmts);
          }
      }
      return 0;
  }