ffmpeg/libavcodec/blockdsp.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 #include <string.h>
  21
  22 #include "config.h"
  23 #include "libavutil/attributes.h"
  24 #include "avcodec.h"
  25 #include "blockdsp.h"
  26 #include "version.h"
  27
  28 static void clear_block_8_c(int16_t *block)
  29 {
  30     memset(block, 0, sizeof(int16_t) * 64);
  31 }
  32
  33 static void clear_blocks_8_c(int16_t *blocks)
  34 {
  35     memset(blocks, 0, sizeof(int16_t) * 6 * 64);
  36 }
  37
  38 static void fill_block16_c(uint8_t *block, uint8_t value, int line_size, int h)
  39 {
  40     int i;
  41
  42     for (i = 0; i < h; i++) {
  43         memset(block, value, 16);
  44         block += line_size;
  45     }
  46 }
  47
  48 static void fill_block8_c(uint8_t *block, uint8_t value, int line_size, int h)
  49 {
  50     int i;
  51
  52     for (i = 0; i < h; i++) {
  53         memset(block, value, 8);
  54         block += line_size;
  55     }
  56 }
  57
  58 av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
  59 {
  60     const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
  61
  62     c->clear_block  = clear_block_8_c;
  63     c->clear_blocks = clear_blocks_8_c;
  64
  65     c->fill_block_tab[0] = fill_block16_c;
  66     c->fill_block_tab[1] = fill_block8_c;
  67
  68     if (ARCH_ALPHA)
  69         ff_blockdsp_init_alpha(c, high_bit_depth);
  70     if (ARCH_ARM)
  71         ff_blockdsp_init_arm(c, high_bit_depth);
  72     if (ARCH_PPC)
  73         ff_blockdsp_init_ppc(c, high_bit_depth);
  74     if (ARCH_X86)
  75 #if FF_API_XVMC
  76         ff_blockdsp_init_x86(c, high_bit_depth, avctx);
  77 #else
  78         ff_blockdsp_init_x86(c, high_bit_depth);
  79 #endif /* FF_API_XVMC */
  80 }