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ffmpeg / libavcodec / x86 / ac3dsp_mmx.c @ dda3f0ef

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1 dda3f0ef Justin Ruggles
/*
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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 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/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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av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c)
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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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    }
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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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    }
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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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    }
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#endif
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}