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 21#include "config.h" 22#include "libavutil/cpu.h" 23#include "libavutil/x86/cpu.h" 24#include "libavresample/dither.h" 25 26void ff_quantize_sse2(int16_t *dst, const float *src, float *dither, int len); 27 28void ff_dither_int_to_float_rectangular_sse2(float *dst, int *src, int len); 29void ff_dither_int_to_float_rectangular_avx(float *dst, int *src, int len); 30 31void ff_dither_int_to_float_triangular_sse2(float *dst, int *src0, int len); 32void ff_dither_int_to_float_triangular_avx(float *dst, int *src0, int len); 33 34av_cold void ff_dither_init_x86(DitherDSPContext *ddsp, 35 enum AVResampleDitherMethod method) 36{ 37 int cpu_flags = av_get_cpu_flags(); 38 39 if (EXTERNAL_SSE2(cpu_flags)) { 40 ddsp->quantize = ff_quantize_sse2; 41 ddsp->ptr_align = 16; 42 ddsp->samples_align = 8; 43 } 44 45 if (method == AV_RESAMPLE_DITHER_RECTANGULAR) { 46 if (EXTERNAL_SSE2(cpu_flags)) { 47 ddsp->dither_int_to_float = ff_dither_int_to_float_rectangular_sse2; 48 } 49 if (EXTERNAL_AVX(cpu_flags)) { 50 ddsp->dither_int_to_float = ff_dither_int_to_float_rectangular_avx; 51 } 52 } else { 53 if (EXTERNAL_SSE2(cpu_flags)) { 54 ddsp->dither_int_to_float = ff_dither_int_to_float_triangular_sse2; 55 } 56 if (EXTERNAL_AVX(cpu_flags)) { 57 ddsp->dither_int_to_float = ff_dither_int_to_float_triangular_avx; 58 } 59 } 60} 61