libavresample/audio_convert.h File Reference

#include "libavutil/samplefmt.h"
#include "avresample.h"
#include "audio_data.h"

Go to the source code of this file.

Typedefs
typedef struct AudioConvert	AudioConvert
Functions
void	ff_audio_convert_set_func (AudioConvert *ac, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int ptr_align, int samples_align, const char *descr, void *conv)
	Set conversion function if the parameters match.
AudioConvert *	ff_audio_convert_alloc (AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels)
	Allocate and initialize AudioConvert context for sample format conversion.
int	ff_audio_convert (AudioConvert *ac, AudioData *out, AudioData *in, int len)
	Convert audio data from one sample format to another.
void	ff_audio_convert_init_x86 (AudioConvert *ac)

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Typedef Documentation

typedef struct AudioConvert AudioConvert

Definition at line 28 of file audio_convert.h.

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Function Documentation

int ff_audio_convert	(	AudioConvert *	ac,
		AudioData *	out,
		AudioData *	in,
		int	len
	)

Convert audio data from one sample format to another.

For each call, the alignment of the input and output AudioData buffers are examined to determine whether to use the generic or optimized conversion function (when available).

Parameters:

	ac	AudioConvert context
	out	output audio data
	in	input audio data
	len	number of samples to convert

Returns:

0 on success, negative AVERROR code on failure

Referenced by avresample_convert().

AudioConvert* ff_audio_convert_alloc	(	AVAudioResampleContext *	avr,
		enum AVSampleFormat	out_fmt,
		enum AVSampleFormat	in_fmt,
		int	channels
	)

Allocate and initialize AudioConvert context for sample format conversion.

Parameters:

	avr	AVAudioResampleContext
	out_fmt	output sample format
	in_fmt	input sample format
	channels	number of channels

Returns:

newly-allocated AudioConvert context

Referenced by avresample_open().

void ff_audio_convert_init_x86

(

AudioConvert *

ac

)

Definition at line 29 of file audio_convert_init.c.

void ff_audio_convert_set_func	(	AudioConvert *	ac,
		enum AVSampleFormat	out_fmt,
		enum AVSampleFormat	in_fmt,
		int	channels,
		int	ptr_align,
		int	samples_align,
		const char *	descr,
		void *	conv
	)

Set conversion function if the parameters match.

This compares the parameters of the conversion function to the parameters in the AudioConvert 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 conversion function. If the parameters match and the alignment is constrained, the function is set as the optimized conversion function.

Parameters:

	ac	AudioConvert context
	out_fmt	output sample format
	in_fmt	input sample format
	channels	number of channels, or 0 for any number of channels
	ptr_align	buffer pointer alignment, in bytes
	sample_align	buffer size alignment, in samples
	descr	function type description (e.g. "C" or "SSE")
	conv	conversion function pointer

Definition at line 66 of file audio_convert.c.

Referenced by ff_audio_convert_init_x86().