fe2ff6d247
This will be beneficial for use with the audio conversion API without
requiring it to depend on all of dsputil.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit c73d99e672)
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/*
|
|
* Format Conversion Utils
|
|
* Copyright (c) 2000, 2001 Fabrice Bellard
|
|
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* 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 "fmtconvert.h"
|
|
|
|
static void int32_to_float_fmul_scalar_c(float *dst, const int *src, float mul, int len){
|
|
int i;
|
|
for(i=0; i<len; i++)
|
|
dst[i] = src[i] * mul;
|
|
}
|
|
|
|
static av_always_inline int float_to_int16_one(const float *src){
|
|
return av_clip_int16(lrintf(*src));
|
|
}
|
|
|
|
static void float_to_int16_c(int16_t *dst, const float *src, long len)
|
|
{
|
|
int i;
|
|
for(i=0; i<len; i++)
|
|
dst[i] = float_to_int16_one(src+i);
|
|
}
|
|
|
|
static void float_to_int16_interleave_c(int16_t *dst, const float **src,
|
|
long len, int channels)
|
|
{
|
|
int i,j,c;
|
|
if(channels==2){
|
|
for(i=0; i<len; i++){
|
|
dst[2*i] = float_to_int16_one(src[0]+i);
|
|
dst[2*i+1] = float_to_int16_one(src[1]+i);
|
|
}
|
|
}else{
|
|
for(c=0; c<channels; c++)
|
|
for(i=0, j=c; i<len; i++, j+=channels)
|
|
dst[j] = float_to_int16_one(src[c]+i);
|
|
}
|
|
}
|
|
|
|
av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
|
|
{
|
|
c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_c;
|
|
c->float_to_int16 = float_to_int16_c;
|
|
c->float_to_int16_interleave = float_to_int16_interleave_c;
|
|
|
|
if (ARCH_ARM) ff_fmt_convert_init_arm(c, avctx);
|
|
if (ARCH_PPC) ff_fmt_convert_init_ppc(c, avctx);
|
|
if (HAVE_MMX) ff_fmt_convert_init_x86(c, avctx);
|
|
}
|