09c2d08c
 Hu Chunming
arm交付版
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/*
* x86-optimized AC-3 DSP functions
* Copyright (c) 2011 Justin Ruggles
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/attributes.h"
#include "libavutil/mem.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "libavcodec/ac3.h"
#include "libavcodec/ac3dsp.h"
void ff_ac3_exponent_min_mmx (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
void ff_ac3_exponent_min_sse2 (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len);
void ff_float_to_fixed24_sse (int32_t *dst, const float *src, unsigned int len);
void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len);
int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
{
int cpu_flags = av_get_cpu_flags();
if (EXTERNAL_MMX(cpu_flags)) {
c->ac3_exponent_min = ff_ac3_exponent_min_mmx;
}
if (EXTERNAL_AMD3DNOW(cpu_flags)) {
if (!bit_exact) {
c->float_to_fixed24 = ff_float_to_fixed24_3dnow;
}
}
if (EXTERNAL_MMXEXT(cpu_flags)) {
c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;
}
if (EXTERNAL_SSE(cpu_flags)) {
c->float_to_fixed24 = ff_float_to_fixed24_sse;
}
if (EXTERNAL_SSE2(cpu_flags)) {
c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
c->float_to_fixed24 = ff_float_to_fixed24_sse2;
c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2;
c->extract_exponents = ff_ac3_extract_exponents_sse2;
}
if (EXTERNAL_SSSE3(cpu_flags)) {
if (!(cpu_flags & AV_CPU_FLAG_ATOM))
c->extract_exponents = ff_ac3_extract_exponents_ssse3;
}
}
#define DOWNMIX_FUNC_OPT(ch, opt) \
void ff_ac3_downmix_ ## ch ## _to_1_ ## opt(float **samples, \
float **matrix, int len); \
void ff_ac3_downmix_ ## ch ## _to_2_ ## opt(float **samples, \
float **matrix, int len);
#define DOWNMIX_FUNCS(opt) \
DOWNMIX_FUNC_OPT(3, opt) \
DOWNMIX_FUNC_OPT(4, opt) \
DOWNMIX_FUNC_OPT(5, opt) \
DOWNMIX_FUNC_OPT(6, opt)
DOWNMIX_FUNCS(sse)
DOWNMIX_FUNCS(avx)
DOWNMIX_FUNCS(fma3)
void ff_ac3dsp_set_downmix_x86(AC3DSPContext *c)
{
int cpu_flags = av_get_cpu_flags();
#define SET_DOWNMIX(ch, suf, SUF) \
if (ch == c->in_channels) { \
if (EXTERNAL_ ## SUF (cpu_flags)) { \
if (c->out_channels == 1) \
c->downmix = ff_ac3_downmix_ ## ch ## _to_1_ ## suf; \
else \
c->downmix = ff_ac3_downmix_ ## ch ## _to_2_ ## suf; \
} \
}
#define SET_DOWNMIX_ALL(suf, SUF) \
SET_DOWNMIX(3, suf, SUF) \
SET_DOWNMIX(4, suf, SUF) \
SET_DOWNMIX(5, suf, SUF) \
SET_DOWNMIX(6, suf, SUF)
SET_DOWNMIX_ALL(sse, SSE)
if (!(cpu_flags & AV_CPU_FLAG_AVXSLOW)) {
SET_DOWNMIX_ALL(avx, AVX)
SET_DOWNMIX_ALL(fma3, FMA3)
}
}
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