text: /*
   * Lossless video DSP utils
   *
   * 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 "../lossless_videodsp.h"
  #include "libavutil/pixdesc.h"
  #include "libavutil/x86/cpu.h"
  
  void ff_add_int16_mmx(uint16_t *dst, const uint16_t *src, unsigned mask, int w);
  void ff_add_int16_sse2(uint16_t *dst, const uint16_t *src, unsigned mask, int w);
  void ff_diff_int16_mmx (uint16_t *dst, const uint16_t *src1, const uint16_t *src2, unsigned mask, int w);
  void ff_diff_int16_sse2(uint16_t *dst, const uint16_t *src1, const uint16_t *src2, unsigned mask, int w);
  int ff_add_hfyu_left_pred_int16_ssse3(uint16_t *dst, const uint16_t *src, unsigned mask, int w, unsigned acc);
  int ff_add_hfyu_left_pred_int16_sse4(uint16_t *dst, const uint16_t *src, unsigned mask, int w, unsigned acc);
  void ff_add_hfyu_median_pred_int16_mmxext(uint16_t *dst, const uint16_t *top, const uint16_t *diff, unsigned mask, int w, int *left, int *left_top);
  void ff_sub_hfyu_median_pred_int16_mmxext(uint16_t *dst, const uint16_t *src1, const uint16_t *src2, unsigned mask, int w, int *left, int *left_top);
  
  
  void ff_llviddsp_init_x86(LLVidDSPContext *c, AVCodecContext *avctx)
  {
      int cpu_flags = av_get_cpu_flags();
      const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(avctx->pix_fmt);
  
      if (EXTERNAL_MMX(cpu_flags)) {
          c->add_int16 = ff_add_int16_mmx;
          c->diff_int16 = ff_diff_int16_mmx;
      }
  
      if (EXTERNAL_MMXEXT(cpu_flags) && pix_desc->comp[0].depth_minus1<15) {
          c->add_hfyu_median_pred_int16 = ff_add_hfyu_median_pred_int16_mmxext;
          c->sub_hfyu_median_pred_int16 = ff_sub_hfyu_median_pred_int16_mmxext;
      }
  
      if (EXTERNAL_SSE2(cpu_flags)) {
          c->add_int16 = ff_add_int16_sse2;
          c->diff_int16 = ff_diff_int16_sse2;
      }
  
      if (EXTERNAL_SSSE3(cpu_flags)) {
          c->add_hfyu_left_pred_int16 = ff_add_hfyu_left_pred_int16_ssse3;
      }
  
      if (EXTERNAL_SSE4(cpu_flags)) {
          c->add_hfyu_left_pred_int16 = ff_add_hfyu_left_pred_int16_sse4;
      }
  }
  