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  1. /*
  2.  * This file is part of FFmpeg.
  3.  *
  4.  * FFmpeg is free software; you can redistribute it and/or
  5.  * modify it under the terms of the GNU Lesser General Public
  6.  * License as published by the Free Software Foundation; either
  7.  * version 2.1 of the License, or (at your option) any later version.
  8.  *
  9.  * FFmpeg is distributed in the hope that it will be useful,
  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12.  * Lesser General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU Lesser General Public
  15.  * License along with FFmpeg; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17.  */
  18.  
  19. #include <stdint.h>
  20.  
  21. #include "config.h"
  22. #include "libavutil/attributes.h"
  23. #include "avcodec.h"
  24. #include "pixblockdsp.h"
  25.  
  26. #define BIT_DEPTH 16
  27. #include "pixblockdsp_template.c"
  28. #undef BIT_DEPTH
  29.  
  30. #define BIT_DEPTH 8
  31. #include "pixblockdsp_template.c"
  32.  
  33. static void diff_pixels_c(int16_t *av_restrict block, const uint8_t *s1,
  34.                           const uint8_t *s2, int stride)
  35. {
  36.     int i;
  37.  
  38.     /* read the pixels */
  39.     for (i = 0; i < 8; i++) {
  40.         block[0] = s1[0] - s2[0];
  41.         block[1] = s1[1] - s2[1];
  42.         block[2] = s1[2] - s2[2];
  43.         block[3] = s1[3] - s2[3];
  44.         block[4] = s1[4] - s2[4];
  45.         block[5] = s1[5] - s2[5];
  46.         block[6] = s1[6] - s2[6];
  47.         block[7] = s1[7] - s2[7];
  48.         s1      += stride;
  49.         s2      += stride;
  50.         block   += 8;
  51.     }
  52. }
  53.  
  54. av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
  55. {
  56.     const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
  57.  
  58.     c->diff_pixels = diff_pixels_c;
  59.  
  60.     switch (avctx->bits_per_raw_sample) {
  61.     case 9:
  62.     case 10:
  63.     case 12:
  64.     case 14:
  65.         c->get_pixels = get_pixels_16_c;
  66.         break;
  67.     default:
  68.         if (avctx->bits_per_raw_sample<=8 || avctx->codec_type != AVMEDIA_TYPE_VIDEO) {
  69.             c->get_pixels = get_pixels_8_c;
  70.         }
  71.         break;
  72.     }
  73.  
  74.     if (ARCH_ALPHA)
  75.         ff_pixblockdsp_init_alpha(c, avctx, high_bit_depth);
  76.     if (ARCH_ARM)
  77.         ff_pixblockdsp_init_arm(c, avctx, high_bit_depth);
  78.     if (ARCH_PPC)
  79.         ff_pixblockdsp_init_ppc(c, avctx, high_bit_depth);
  80.     if (ARCH_X86)
  81.         ff_pixblockdsp_init_x86(c, avctx, high_bit_depth);
  82.     if (ARCH_MIPS)
  83.         ff_pixblockdsp_init_mips(c, avctx, high_bit_depth);
  84. }
  85.