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85 lines
3.6 KiB
C
85 lines
3.6 KiB
C
/*
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* x86-optimized AC-3 DSP utils
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* Copyright (c) 2011 Justin Ruggles
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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/x86_cpu.h"
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#include "dsputil_mmx.h"
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#include "libavcodec/ac3dsp.h"
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extern void ff_ac3_exponent_min_mmx (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
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extern void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
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extern void ff_ac3_exponent_min_sse2 (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
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extern int ff_ac3_max_msb_abs_int16_mmx (const int16_t *src, int len);
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extern int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len);
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extern int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len);
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extern int ff_ac3_max_msb_abs_int16_ssse3 (const int16_t *src, int len);
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extern void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift);
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extern void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift);
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extern void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift);
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extern void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift);
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extern void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len);
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extern void ff_float_to_fixed24_sse (int32_t *dst, const float *src, unsigned int len);
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extern void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len);
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extern int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
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av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
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{
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int mm_flags = av_get_cpu_flags();
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#if HAVE_YASM
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if (mm_flags & AV_CPU_FLAG_MMX) {
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c->ac3_exponent_min = ff_ac3_exponent_min_mmx;
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c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx;
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c->ac3_lshift_int16 = ff_ac3_lshift_int16_mmx;
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c->ac3_rshift_int32 = ff_ac3_rshift_int32_mmx;
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}
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if (mm_flags & AV_CPU_FLAG_3DNOW && HAVE_AMD3DNOW) {
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if (!bit_exact) {
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c->float_to_fixed24 = ff_float_to_fixed24_3dnow;
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}
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}
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if (mm_flags & AV_CPU_FLAG_MMX2 && HAVE_MMX2) {
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c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;
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c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext;
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}
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if (mm_flags & AV_CPU_FLAG_SSE && HAVE_SSE) {
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c->float_to_fixed24 = ff_float_to_fixed24_sse;
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}
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if (mm_flags & AV_CPU_FLAG_SSE2 && HAVE_SSE) {
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c->ac3_exponent_min = ff_ac3_exponent_min_sse2;
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c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_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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if (!(mm_flags & AV_CPU_FLAG_SSE2SLOW)) {
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c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
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c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
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}
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}
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if (mm_flags & AV_CPU_FLAG_SSSE3 && HAVE_SSSE3) {
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c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;
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}
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#endif
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}
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