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 
34 
35 typedef void (conv_func_type)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end);
36 typedef void (simd_func_type)(uint8_t **dst, const uint8_t **src, int len);
37 
38 typedef struct AudioConvert {
39  int channels;
44  const int *ch_map;
45  uint8_t silence[8]; ///< silence input sample
47 
48 /**
49  * Create an audio sample format converter context
50  * @param out_fmt Output sample format
51  * @param in_fmt Input sample format
52  * @param channels Number of channels
53  * @param flags See AV_CPU_FLAG_xx
54  * @param ch_map list of the channels id to pick from the source stream, NULL
55  * if all channels must be selected
56  * @return NULL on error
57  */
59  enum AVSampleFormat in_fmt,
60  int channels, const int *ch_map,
61  int flags);
62 
63 /**
64  * Free audio sample format converter context.
65  * and set the pointer to NULL
66  */
68 
69 /**
70  * Convert between audio sample formats
71  * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
72  * @param[in] in array of input buffers for each channel
73  * @param len length of audio frame size (measured in samples)
74  */
76 
77 #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:40
AudioConvert::channels
int channels
Definition: audioconvert.h:39
AudioConvert::ch_map
const int * ch_map
Definition: audioconvert.h:44
AudioConvert::silence
uint8_t silence[8]
silence input sample
Definition: audioconvert.h:45
AudioData
Definition: swresample_internal.h:45
AudioConvert::conv_f
conv_func_type * conv_f
Definition: audioconvert.h:42
AudioConvert::out_simd_align_mask
int out_simd_align_mask
Definition: audioconvert.h:41
ctx
AVFormatContext * ctx
Definition: movenc.c:48
channels
channels
Definition: aptx.h:31
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:43
ch_map
static const int ch_map[SC_NB]
Definition: af_surround.c:37
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:55
len
int len
Definition: vorbis_enc_data.h:426
simd_func_type
void() simd_func_type(uint8_t **dst, const uint8_t **src, int len)
Definition: audioconvert.h:36
AudioConvert
Definition: audioconvert.h:38
swri_audio_convert_free
void swri_audio_convert_free(AudioConvert **ctx)
Free audio sample format converter context.
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
conv_func_type
void() conv_func_type(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end)
Definition: audioconvert.h:35
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474