2 * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
4 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/cpu.h"
23 #include "libavutil/x86/cpu.h"
24 #include "libavresample/dither.h"
26 extern void ff_quantize_sse2(int16_t *dst, const float *src, float *dither,
29 extern void ff_dither_int_to_float_rectangular_sse2(float *dst, int *src, int len);
30 extern void ff_dither_int_to_float_rectangular_avx(float *dst, int *src, int len);
32 extern void ff_dither_int_to_float_triangular_sse2(float *dst, int *src0, int len);
33 extern void ff_dither_int_to_float_triangular_avx(float *dst, int *src0, int len);
35 av_cold void ff_dither_init_x86(DitherDSPContext *ddsp,
36 enum AVResampleDitherMethod method)
38 int mm_flags = av_get_cpu_flags();
40 if (EXTERNAL_SSE2(mm_flags)) {
41 ddsp->quantize = ff_quantize_sse2;
43 ddsp->samples_align = 8;
46 if (method == AV_RESAMPLE_DITHER_RECTANGULAR) {
47 if (EXTERNAL_SSE2(mm_flags)) {
48 ddsp->dither_int_to_float = ff_dither_int_to_float_rectangular_sse2;
50 if (EXTERNAL_AVX(mm_flags)) {
51 ddsp->dither_int_to_float = ff_dither_int_to_float_rectangular_avx;
54 if (EXTERNAL_SSE2(mm_flags)) {
55 ddsp->dither_int_to_float = ff_dither_int_to_float_triangular_sse2;
57 if (EXTERNAL_AVX(mm_flags)) {
58 ddsp->dither_int_to_float = ff_dither_int_to_float_triangular_avx;