PeerStreamer

/*

 * x86-optimized AC-3 DSP utils

 * 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/x86_cpu.h"

#include "dsputil_mmx.h"

#include "libavcodec/ac3dsp.h"

extern void ff_ac3_exponent_min_mmx   (uint8_t *exp, int num_reuse_blocks, int nb_coefs);

extern void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs);

extern void ff_ac3_exponent_min_sse2  (uint8_t *exp, int num_reuse_blocks, int nb_coefs);

av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c)

{

    int mm_flags = av_get_cpu_flags();

#if HAVE_YASM

    if (mm_flags & AV_CPU_FLAG_MMX) {

        c->ac3_exponent_min = ff_ac3_exponent_min_mmx;

    }

    if (mm_flags & AV_CPU_FLAG_MMX2 && HAVE_MMX2) {

        c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;

    }

    if (mm_flags & AV_CPU_FLAG_SSE2 && HAVE_SSE) {

        c->ac3_exponent_min = ff_ac3_exponent_min_sse2;

    }

#endif

}