mirror of
https://github.com/librempeg/librempeg
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99 lines
3.7 KiB
C
99 lines
3.7 KiB
C
/*
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* x86-optimized AC-3 DSP functions
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* Copyright (c) 2011 Justin Ruggles
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/x86/asm.h"
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#include "libavutil/x86/cpu.h"
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#include "libavcodec/ac3dsp.h"
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void ff_ac3_exponent_min_sse2 (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
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void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, size_t len);
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void ff_float_to_fixed24_avx (int32_t *dst, const float *src, size_t len);
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int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
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void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
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void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
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av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c)
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{
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int cpu_flags = av_get_cpu_flags();
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if (EXTERNAL_SSE2(cpu_flags)) {
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c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
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c->float_to_fixed24 = ff_float_to_fixed24_sse2;
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c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
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c->extract_exponents = ff_ac3_extract_exponents_sse2;
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}
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if (EXTERNAL_SSSE3(cpu_flags)) {
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if (!(cpu_flags & AV_CPU_FLAG_ATOM))
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c->extract_exponents = ff_ac3_extract_exponents_ssse3;
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}
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if (EXTERNAL_AVX_FAST(cpu_flags)) {
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c->float_to_fixed24 = ff_float_to_fixed24_avx;
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}
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}
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#define DOWNMIX_FUNC_OPT(ch, opt) \
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void ff_ac3_downmix_ ## ch ## _to_1_ ## opt(float **samples, \
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float **matrix, int len); \
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void ff_ac3_downmix_ ## ch ## _to_2_ ## opt(float **samples, \
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float **matrix, int len);
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#define DOWNMIX_FUNCS(opt) \
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DOWNMIX_FUNC_OPT(3, opt) \
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DOWNMIX_FUNC_OPT(4, opt) \
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DOWNMIX_FUNC_OPT(5, opt) \
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DOWNMIX_FUNC_OPT(6, opt)
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DOWNMIX_FUNCS(sse)
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DOWNMIX_FUNCS(avx)
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DOWNMIX_FUNCS(fma3)
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void ff_ac3dsp_set_downmix_x86(AC3DSPContext *c)
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{
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int cpu_flags = av_get_cpu_flags();
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#define SET_DOWNMIX(ch, suf, SUF) \
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if (ch == c->in_channels) { \
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if (EXTERNAL_ ## SUF (cpu_flags)) { \
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if (c->out_channels == 1) \
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c->downmix = ff_ac3_downmix_ ## ch ## _to_1_ ## suf; \
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else \
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c->downmix = ff_ac3_downmix_ ## ch ## _to_2_ ## suf; \
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} \
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}
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#define SET_DOWNMIX_ALL(suf, SUF) \
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SET_DOWNMIX(3, suf, SUF) \
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SET_DOWNMIX(4, suf, SUF) \
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SET_DOWNMIX(5, suf, SUF) \
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SET_DOWNMIX(6, suf, SUF)
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SET_DOWNMIX_ALL(sse, SSE)
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if (!(cpu_flags & AV_CPU_FLAG_AVXSLOW)) {
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SET_DOWNMIX_ALL(avx, AVX)
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SET_DOWNMIX_ALL(fma3, FMA3)
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}
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}
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