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ffmpeg-4.2.2/libavcodec/utvideodsp.c 2.53 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
   */
  
  #include <stdint.h>
  
  #include "config.h"
  #include "libavutil/attributes.h"
  #include "utvideodsp.h"
  
  static void restore_rgb_planes_c(uint8_t *src_r,
                                   uint8_t *src_g,
                                   uint8_t *src_b,
                                   ptrdiff_t linesize_r,
                                   ptrdiff_t linesize_g,
                                   ptrdiff_t linesize_b,
                                   int width, int height)
  {
      uint8_t r, g, b;
      int i, j;
  
      for (j = 0; j < height; j++) {
          for (i = 0; i < width; i++) {
              r = src_r[i];
              g = src_g[i];
              b = src_b[i];
              src_r[i] = r + g - 0x80;
              src_b[i] = b + g - 0x80;
          }
          src_r += linesize_r;
          src_g += linesize_g;
          src_b += linesize_b;
      }
  }
  
  static void restore_rgb_planes10_c(uint16_t *src_r,
                                     uint16_t *src_g,
                                     uint16_t *src_b,
                                     ptrdiff_t linesize_r,
                                     ptrdiff_t linesize_g,
                                     ptrdiff_t linesize_b,
                                     int width, int height)
  {
      int r, g, b;
      int i, j;
  
      for (j = 0; j < height; j++) {
          for (i = 0; i < width; i++) {
              r = src_r[i];
              g = src_g[i];
              b = src_b[i];
              src_r[i] = (r + g - 0x200) & 0x3FF;
              src_b[i] = (b + g - 0x200) & 0x3FF;
          }
          src_r += linesize_r;
          src_g += linesize_g;
          src_b += linesize_b;
      }
  }
  
  av_cold void ff_utvideodsp_init(UTVideoDSPContext *c)
  {
      c->restore_rgb_planes   = restore_rgb_planes_c;
      c->restore_rgb_planes10 = restore_rgb_planes10_c;
  
      if (ARCH_X86)
          ff_utvideodsp_init_x86(c);
  }