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)

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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.

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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().