audio_mix.h File Reference

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

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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. More...
AudioMix *	ff_audio_mix_alloc (AVAudioResampleContext *avr)
	Allocate and initialize an AudioMix context. More...
void	ff_audio_mix_free (AudioMix **am)
	Free an AudioMix context. More...
int	ff_audio_mix (AudioMix *am, AudioData *src)
	Apply channel mixing to audio data using the current mixing matrix. More...
int	ff_audio_mix_get_matrix (AudioMix *am, double *matrix, int stride)
	Get the current mixing matrix. More...
int	ff_audio_mix_set_matrix (AudioMix *am, const double *matrix, int stride)
	Set the current mixing matrix. More...
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 31 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 428 of file audio_mix.c.

Referenced by avresample_convert().

AudioMix* ff_audio_mix_alloc

(

AVAudioResampleContext *

avr

)

Allocate and initialize an AudioMix context.

The parameters in the AVAudioResampleContext are used to initialize the AudioMix context.

Parameters

avr	AVAudioResampleContext

Returns

newly-allocated AudioMix context.

Definition at line 341 of file audio_mix.c.

Referenced by avresample_open().

void ff_audio_mix_free

(

AudioMix **

am

)

Free an AudioMix context.

Definition at line 409 of file audio_mix.c.

Referenced by avresample_close().

int ff_audio_mix_get_matrix	(	AudioMix *	am,
		double *	matrix,
		int	stride
	)

Get the current mixing matrix.

Definition at line 483 of file audio_mix.c.

Referenced by avresample_get_matrix().

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 61 of file audio_mix.c.

Referenced by ff_audio_mix_init_x86(), and mix_function_init().

int ff_audio_mix_set_matrix	(	AudioMix *	am,
		const double *	matrix,
		int	stride
	)

Set the current mixing matrix.

Definition at line 650 of file audio_mix.c.

Referenced by avresample_set_matrix(), and ff_audio_mix_alloc().