mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
2.2 KiB
68 lines
2.2 KiB
/* |
|
* Format Conversion Utils |
|
* Copyright (c) 2000, 2001 Fabrice Bellard |
|
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
|
* |
|
* This file is part of Libav. |
|
* |
|
* Libav 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. |
|
* |
|
* Libav 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 Libav; 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 (HAVE_ALTIVEC) ff_fmt_convert_init_altivec(c, avctx); |
|
if (HAVE_MMX) ff_fmt_convert_init_x86(c, avctx); |
|
}
|
|
|