FFmpeg
audioconvert.h
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1 /*
2  * audio conversion
3  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4  * Copyright (c) 2008 Peter Ross
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #ifndef SWRESAMPLE_AUDIOCONVERT_H
24 #define SWRESAMPLE_AUDIOCONVERT_H
25 
26 /**
27  * @file
28  * Audio format conversion routines
29  */
30 
31 
32 #include "swresample_internal.h"
33 #include "libavutil/cpu.h"
34 
35 
36 typedef void (conv_func_type)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end);
37 typedef void (simd_func_type)(uint8_t **dst, const uint8_t **src, int len);
38 
39 typedef struct AudioConvert {
40  int channels;
45  const int *ch_map;
46  uint8_t silence[8]; ///< silence input sample
48 
49 /**
50  * Create an audio sample format converter context
51  * @param out_fmt Output sample format
52  * @param in_fmt Input sample format
53  * @param channels Number of channels
54  * @param flags See AV_CPU_FLAG_xx
55  * @param ch_map list of the channels id to pick from the source stream, NULL
56  * if all channels must be selected
57  * @return NULL on error
58  */
60  enum AVSampleFormat in_fmt,
61  int channels, const int *ch_map,
62  int flags);
63 
64 /**
65  * Free audio sample format converter context.
66  * and set the pointer to NULL
67  */
69 
70 /**
71  * Convert between audio sample formats
72  * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
73  * @param[in] in array of input buffers for each channel
74  * @param len length of audio frame size (measured in samples)
75  */
77 
78 #endif /* SWRESAMPLE_AUDIOCONVERT_H */
out
FILE * out
Definition: movenc.c:54
is
The official guide to swscale for confused that is
Definition: swscale.txt:28
AudioConvert::in_simd_align_mask
int in_simd_align_mask
Definition: audioconvert.h:41
AudioConvert::channels
int channels
Definition: audioconvert.h:40
AudioConvert::ch_map
const int * ch_map
Definition: audioconvert.h:45
AudioConvert::silence
uint8_t silence[8]
silence input sample
Definition: audioconvert.h:46
AudioData
Definition: swresample_internal.h:45
AudioConvert::conv_f
conv_func_type * conv_f
Definition: audioconvert.h:43
AudioConvert::out_simd_align_mask
int out_simd_align_mask
Definition: audioconvert.h:42
ctx
AVFormatContext * ctx
Definition: movenc.c:48
channels
channels
Definition: aptx.h:33
swri_audio_convert
int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len)
Convert between audio sample formats.
AudioConvert::simd_f
simd_func_type * simd_f
Definition: audioconvert.h:44
src
#define src
Definition: vp8dsp.c:255
cpu.h
swresample_internal.h
swri_audio_convert_alloc
AudioConvert * swri_audio_convert_alloc(enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, const int *ch_map, int flags)
Create an audio sample format converter context.
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
len
int len
Definition: vorbis_enc_data.h:452
simd_func_type
void() simd_func_type(uint8_t **dst, const uint8_t **src, int len)
Definition: audioconvert.h:37
AudioConvert
Definition: audioconvert.h:39
swri_audio_convert_free
void swri_audio_convert_free(AudioConvert **ctx)
Free audio sample format converter context.
conv_func_type
void() conv_func_type(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end)
Definition: audioconvert.h:36
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561