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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 "config.h"
  20. #include "libavutil/attributes.h"
  21. #include "libavutil/cpu.h"
  22. #include "libavutil/samplefmt.h"
  23. #include "libavutil/x86/cpu.h"
  24. #include "libavfilter/af_volume.h"
  25.  
  26. void ff_scale_samples_s16_sse2(uint8_t *dst, const uint8_t *src, int len,
  27.                                int volume);
  28.  
  29. void ff_scale_samples_s32_sse2(uint8_t *dst, const uint8_t *src, int len,
  30.                                int volume);
  31. void ff_scale_samples_s32_ssse3_atom(uint8_t *dst, const uint8_t *src, int len,
  32.                                      int volume);
  33. void ff_scale_samples_s32_avx(uint8_t *dst, const uint8_t *src, int len,
  34.                               int volume);
  35.  
  36. av_cold void ff_volume_init_x86(VolumeContext *vol)
  37. {
  38.     int cpu_flags = av_get_cpu_flags();
  39.     enum AVSampleFormat sample_fmt = av_get_packed_sample_fmt(vol->sample_fmt);
  40.  
  41.     if (sample_fmt == AV_SAMPLE_FMT_S16) {
  42.         if (EXTERNAL_SSE2(cpu_flags) && vol->volume_i < 32768) {
  43.             vol->scale_samples = ff_scale_samples_s16_sse2;
  44.             vol->samples_align = 8;
  45.         }
  46.     } else if (sample_fmt == AV_SAMPLE_FMT_S32) {
  47.         if (EXTERNAL_SSE2(cpu_flags)) {
  48.             vol->scale_samples = ff_scale_samples_s32_sse2;
  49.             vol->samples_align = 4;
  50.         }
  51.         if (EXTERNAL_SSSE3(cpu_flags) && cpu_flags & AV_CPU_FLAG_ATOM) {
  52.             vol->scale_samples = ff_scale_samples_s32_ssse3_atom;
  53.             vol->samples_align = 4;
  54.         }
  55.         if (EXTERNAL_AVX(cpu_flags)) {
  56.             vol->scale_samples = ff_scale_samples_s32_avx;
  57.             vol->samples_align = 8;
  58.         }
  59.     }
  60. }
  61.