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
|
/*
* 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
*/
#ifndef AVCODEC_FMTCONVERT_H
#define AVCODEC_FMTCONVERT_H
#include "avcodec.h"
typedef struct FmtConvertContext {
/**
* Convert an array of int32_t to float and multiply by a float value.
* @param dst destination array of float.
* constraints: 16-byte aligned
* @param src source array of int32_t.
* constraints: 16-byte aligned
* @param len number of elements to convert.
* constraints: multiple of 8
*/
void (*int32_to_float_fmul_scalar)(float *dst, const int *src, float mul, int len);
/**
* Convert an array of float to an array of int16_t.
*
* Convert floats from in the range [-32768.0,32767.0] to ints
* without rescaling
*
* @param dst destination array of int16_t.
* constraints: 16-byte aligned
* @param src source array of float.
* constraints: 16-byte aligned
* @param len number of elements to convert.
* constraints: multiple of 8
*/
void (*float_to_int16)(int16_t *dst, const float *src, long len);
/**
* Convert multiple arrays of float to an interleaved array of int16_t.
*
* Convert floats from in the range [-32768.0,32767.0] to ints
* without rescaling
*
* @param dst destination array of interleaved int16_t.
* constraints: 16-byte aligned
* @param src source array of float arrays, one for each channel.
* constraints: 16-byte aligned
* @param len number of elements to convert.
* constraints: multiple of 8
* @param channels number of channels
*/
void (*float_to_int16_interleave)(int16_t *dst, const float **src,
long len, int channels);
} FmtConvertContext;
void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx);
void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx);
void ff_fmt_convert_init_altivec(FmtConvertContext *c, AVCodecContext *avctx);
void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx);
#endif /* AVCODEC_FMTCONVERT_H */
|
