1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/*
* 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"
#include "libavutil/common.h"
static void int32_to_float_fmul_scalar_c(float *dst, const int32_t *src,
float mul, int len)
{
int i;
for(i=0; i<len; i++)
dst[i] = src[i] * mul;
}
static void int32_to_float_fmul_array8_c(FmtConvertContext *c, float *dst,
const int32_t *src, const float *mul,
int len)
{
int i;
for (i = 0; i < len; i += 8)
c->int32_to_float_fmul_scalar(&dst[i], &src[i], *mul++, 8);
}
av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
{
c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_c;
c->int32_to_float_fmul_array8 = int32_to_float_fmul_array8_c;
if (ARCH_ARM) ff_fmt_convert_init_arm(c, avctx);
if (ARCH_PPC) ff_fmt_convert_init_ppc(c, avctx);
if (ARCH_X86) ff_fmt_convert_init_x86(c, avctx);
if (HAVE_MIPSFPU) ff_fmt_convert_init_mips(c);
}
/* ffdshow custom code */
void float_interleave(float *dst, const float **src, long len, int channels)
{
int i,j,c;
if(channels==2){
for(i=0; i<len; i++){
dst[2*i] = src[0][i] / 32768.0f;
dst[2*i+1] = src[1][i] / 32768.0f;
}
}else{
for(c=0; c<channels; c++)
for(i=0, j=c; i<len; i++, j+=channels)
dst[j] = src[c][i] / 32768.0f;
}
}
void float_interleave_noscale(float *dst, const float **src, long len, int channels)
{
int i,j,c;
if(channels==2){
for(i=0; i<len; i++){
dst[2*i] = src[0][i];
dst[2*i+1] = src[1][i];
}
}else{
for(c=0; c<channels; c++)
for(i=0, j=c; i<len; i++, j+=channels)
dst[j] = src[c][i];
}
}
|
