aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* Monkey's Audio lossless audio decoder
* Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
* based upon libdemac from Dave Chapman.
*
* 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 "avcodec.h"
#include "lossless_audiodsp.h"
static int32_t scalarproduct_and_madd_int16_c(int16_t *v1, const int16_t *v2,
const int16_t *v3,
int order, int mul)
{
int res = 0;
do {
res += *v1 * *v2++;
*v1++ += mul * *v3++;
res += *v1 * *v2++;
*v1++ += mul * *v3++;
} while (order-=2);
return res;
}
static int32_t scalarproduct_and_madd_int32_c(int16_t *v1, const int32_t *v2,
const int16_t *v3,
int order, int mul)
{
int res = 0;
do {
res += *v1 * (uint32_t)*v2++;
*v1++ += mul * *v3++;
res += *v1 * (uint32_t)*v2++;
*v1++ += mul * *v3++;
} while (order-=2);
return res;
}
av_cold void ff_llauddsp_init(LLAudDSPContext *c)
{
c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_c;
c->scalarproduct_and_madd_int32 = scalarproduct_and_madd_int32_c;
if (ARCH_ARM)
ff_llauddsp_init_arm(c);
if (ARCH_PPC)
ff_llauddsp_init_ppc(c);
if (ARCH_X86)
ff_llauddsp_init_x86(c);
}
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