ffmpeg/libavcodec/pixblockdsp.c

   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 }