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ffmpeg-4.2.2/libavfilter/scene_sad.c 1.77 KB
aac5773f   hucm   功能基本完成,接口待打磨
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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
   */
  
  /**
   * @file
   * Scene SAD functions
   */
  
  #include "scene_sad.h"
  
  void ff_scene_sad16_c(SCENE_SAD_PARAMS)
  {
      uint64_t sad = 0;
      const uint16_t *src1w = (const uint16_t *)src1;
      const uint16_t *src2w = (const uint16_t *)src2;
      int x, y;
  
      stride1 /= 2;
      stride2 /= 2;
  
      for (y = 0; y < height; y++) {
          for (x = 0; x < width; x++)
              sad += FFABS(src1w[x] - src2w[x]);
          src1w += stride1;
          src2w += stride2;
      }
      *sum = sad;
  }
  
  void ff_scene_sad_c(SCENE_SAD_PARAMS)
  {
      uint64_t sad = 0;
      int x, y;
  
      for (y = 0; y < height; y++) {
          for (x = 0; x < width; x++)
              sad += FFABS(src1[x] - src2[x]);
          src1 += stride1;
          src2 += stride2;
      }
      *sum = sad;
  }
  
  ff_scene_sad_fn ff_scene_sad_get_fn(int depth)
  {
      ff_scene_sad_fn sad = NULL;
      if (ARCH_X86)
          sad = ff_scene_sad_get_fn_x86(depth);
      if (!sad) {
          if (depth == 8)
              sad = ff_scene_sad_c;
          if (depth == 16)
              sad = ff_scene_sad16_c;
      }
      return sad;
  }