dither_init.c 2.2 KB

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  1. /*
  2. * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
  3. *
  4. * This file is part of FFmpeg.
  5. *
  6. * FFmpeg is free software; you can redistribute it and/or
  7. * modify it under the terms of the GNU Lesser General Public
  8. * License as published by the Free Software Foundation; either
  9. * version 2.1 of the License, or (at your option) any later version.
  10. *
  11. * FFmpeg is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14. * Lesser General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU Lesser General Public
  17. * License along with FFmpeg; if not, write to the Free Software
  18. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19. */
  20. #include "config.h"
  21. #include "libavutil/cpu.h"
  22. #include "libavutil/x86/cpu.h"
  23. #include "libavresample/dither.h"
  24. void ff_quantize_sse2(int16_t *dst, const float *src, float *dither, int len);
  25. void ff_dither_int_to_float_rectangular_sse2(float *dst, int *src, int len);
  26. void ff_dither_int_to_float_rectangular_avx(float *dst, int *src, int len);
  27. void ff_dither_int_to_float_triangular_sse2(float *dst, int *src0, int len);
  28. void ff_dither_int_to_float_triangular_avx(float *dst, int *src0, int len);
  29. av_cold void ff_dither_init_x86(DitherDSPContext *ddsp,
  30. enum AVResampleDitherMethod method)
  31. {
  32. int cpu_flags = av_get_cpu_flags();
  33. if (EXTERNAL_SSE2(cpu_flags)) {
  34. ddsp->quantize = ff_quantize_sse2;
  35. ddsp->ptr_align = 16;
  36. ddsp->samples_align = 8;
  37. }
  38. if (method == AV_RESAMPLE_DITHER_RECTANGULAR) {
  39. if (EXTERNAL_SSE2(cpu_flags)) {
  40. ddsp->dither_int_to_float = ff_dither_int_to_float_rectangular_sse2;
  41. }
  42. if (EXTERNAL_AVX(cpu_flags)) {
  43. ddsp->dither_int_to_float = ff_dither_int_to_float_rectangular_avx;
  44. }
  45. } else {
  46. if (EXTERNAL_SSE2(cpu_flags)) {
  47. ddsp->dither_int_to_float = ff_dither_int_to_float_triangular_sse2;
  48. }
  49. if (EXTERNAL_AVX(cpu_flags)) {
  50. ddsp->dither_int_to_float = ff_dither_int_to_float_triangular_avx;
  51. }
  52. }
  53. }