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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 "libavutil/internal.h"
  24. #include "libavutil/cpu.h"
  25. #include "libavutil/x86/cpu.h"
  26. #include "libavcodec/blockdsp.h"
  27. #include "libavcodec/version.h"
  28.  
  29. void ff_clear_block_mmx(int16_t *block);
  30. void ff_clear_block_sse(int16_t *block);
  31. void ff_clear_blocks_mmx(int16_t *blocks);
  32. void ff_clear_blocks_sse(int16_t *blocks);
  33.  
  34. av_cold void ff_blockdsp_init_x86(BlockDSPContext *c, unsigned high_bit_depth,
  35.                                   AVCodecContext *avctx)
  36. {
  37. #if HAVE_YASM
  38.     int cpu_flags = av_get_cpu_flags();
  39.  
  40.     if (!high_bit_depth) {
  41.         if (EXTERNAL_MMX(cpu_flags)) {
  42.             c->clear_block  = ff_clear_block_mmx;
  43.             c->clear_blocks = ff_clear_blocks_mmx;
  44.         }
  45.  
  46.     /* XvMCCreateBlocks() may not allocate 16-byte aligned blocks */
  47.     if (CONFIG_XVMC && avctx->hwaccel && avctx->hwaccel->decode_mb)
  48.         return;
  49.  
  50.         if (EXTERNAL_SSE(cpu_flags)) {
  51.             c->clear_block  = ff_clear_block_sse;
  52.             c->clear_blocks = ff_clear_blocks_sse;
  53.         }
  54.     }
  55. #endif /* HAVE_YASM */
  56. }
  57.