libavresample/audio_mix.h File Reference

#include <stdint.h>
#include "libavutil/samplefmt.h"
#include "avresample.h"
#include "audio_data.h"

Go to the source code of this file.

Data Structures

struct  AudioMix

Typedefs

typedef void( mix_func )(uint8_t **src, void **matrix, int len, int out_ch, int in_ch)

Functions

void ff_audio_mix_set_func (AudioMix *am, enum AVSampleFormat fmt, enum AVMixCoeffType coeff_type, int in_channels, int out_channels, int ptr_align, int samples_align, const char *descr, void *mix_func)
 Set mixing function if the parameters match.
int ff_audio_mix_init (AVAudioResampleContext *avr)
 Initialize the AudioMix context in the AVAudioResampleContext.
void ff_audio_mix_close (AudioMix *am)
 Close an AudioMix context.
int ff_audio_mix (AudioMix *am, AudioData *src)
 Apply channel mixing to audio data using the current mixing matrix.
void ff_audio_mix_init_x86 (AudioMix *am)


Typedef Documentation

typedef void( mix_func)(uint8_t **src, void **matrix, int len, int out_ch, int in_ch)

Definition at line 30 of file audio_mix.h.


Function Documentation

int ff_audio_mix ( AudioMix am,
AudioData src 
)

Apply channel mixing to audio data using the current mixing matrix.

Definition at line 398 of file audio_mix.c.

Referenced by avresample_convert().

void ff_audio_mix_close ( AudioMix am  ) 

Close an AudioMix context.

This clears and frees the mixing matrix arrays.

Definition at line 385 of file audio_mix.c.

Referenced by avresample_close().

int ff_audio_mix_init ( AVAudioResampleContext avr  ) 

Initialize the AudioMix context in the AVAudioResampleContext.

The parameters in the AVAudioResampleContext are used to initialize the AudioMix context and set the mixing matrix.

Parameters:
avr AVAudioResampleContext
Returns:
0 on success, negative AVERROR code on failure

Definition at line 305 of file audio_mix.c.

Referenced by avresample_open().

void ff_audio_mix_init_x86 ( AudioMix am  ) 

Definition at line 174 of file audio_mix_init.c.

Referenced by mix_function_init().

void ff_audio_mix_set_func ( AudioMix am,
enum AVSampleFormat  fmt,
enum AVMixCoeffType  coeff_type,
int  in_channels,
int  out_channels,
int  ptr_align,
int  samples_align,
const char *  descr,
void *  mix_func 
)

Set mixing function if the parameters match.

This compares the parameters of the mixing function to the parameters in the AudioMix context. If the parameters do not match, no changes are made to the active functions. If the parameters do match and the alignment is not constrained, the function is set as the generic mixing function. If the parameters match and the alignment is constrained, the function is set as the optimized mixing function.

Parameters:
am AudioMix context
fmt input/output sample format
coeff_type mixing coefficient type
in_channels number of input channels, or 0 for any number of channels
out_channels number of output channels, or 0 for any number of channels
ptr_align buffer pointer alignment, in bytes
samples_align buffer size alignment, in samples
descr function type description (e.g. "C" or "SSE")
mix_func mixing function pointer

Definition at line 33 of file audio_mix.c.

Referenced by ff_audio_mix_init_x86(), and mix_function_init().


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