libavcodec/audioconvert.h File Reference

Audio format conversion routines. More...

#include "libavutil/cpu.h"
#include "avcodec.h"
#include "libavutil/audioconvert.h"

Go to the source code of this file.

Typedefs

typedef struct AVAudioConvert AVAudioConvert

Functions

AVAudioConvertav_audio_convert_alloc (enum AVSampleFormat out_fmt, int out_channels, enum AVSampleFormat in_fmt, int in_channels, const float *matrix, int flags)
 Create an audio sample format converter context.
void av_audio_convert_free (AVAudioConvert *ctx)
 Free audio sample format converter context.
int av_audio_convert (AVAudioConvert *ctx, void *const out[6], const int out_stride[6], const void *const in[6], const int in_stride[6], int len)
 Convert between audio sample formats.


Detailed Description

Audio format conversion routines.

Definition in file audioconvert.h.


Typedef Documentation

Definition at line 37 of file audioconvert.h.


Function Documentation

int av_audio_convert ( AVAudioConvert ctx,
void *const   out[6],
const int  out_stride[6],
const void *const   in[6],
const int  in_stride[6],
int  len 
)

Convert between audio sample formats.

Parameters:
[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
[in] out_stride distance between consecutive output samples (measured in bytes)
[in] in array of input buffers for each channel
[in] in_stride distance between consecutive input samples (measured in bytes)
len length of audio frame size (measured in samples)

Definition at line 60 of file audioconvert.c.

Referenced by audio_resample().

AVAudioConvert* av_audio_convert_alloc ( enum AVSampleFormat  out_fmt,
int  out_channels,
enum AVSampleFormat  in_fmt,
int  in_channels,
const float *  matrix,
int  flags 
)

Create an audio sample format converter context.

Parameters:
out_fmt Output sample format
out_channels Number of output channels
in_fmt Input sample format
in_channels Number of input channels
[in] matrix Channel mixing matrix (of dimension in_channel*out_channels). Set to NULL to ignore.
flags See AV_CPU_FLAG_xx
Returns:
NULL on error

Definition at line 39 of file audioconvert.c.

Referenced by av_audio_resample_init().

void av_audio_convert_free ( AVAudioConvert ctx  ) 

Free audio sample format converter context.

Definition at line 55 of file audioconvert.c.

Referenced by audio_resample_close(), and av_audio_resample_init().


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