resample.c File Reference

#include "libavutil/common.h"
#include "libavutil/libm.h"
#include "libavutil/log.h"
#include "internal.h"
#include "resample.h"
#include "audio_data.h"
#include "resample_template.c"

Go to the source code of this file.

Data Structures
struct	resample_init_func

Macros
#define	CONFIG_RESAMPLE_DBL
#define	CONFIG_RESAMPLE_FLT
#define	CONFIG_RESAMPLE_S32

Functions
static double	bessel (double x)
static int	build_filter (ResampleContext *c)
ResampleContext *	ff_audio_resample_init (AVAudioResampleContext *avr)
	Allocate and initialize a ResampleContext.
void	ff_audio_resample_free (ResampleContext **c)
	Free a ResampleContext.
int	avresample_set_compensation (AVAudioResampleContext *avr, int sample_delta, int compensation_distance)
	Set compensation for resampling.
static int	resample (ResampleContext *c, void *dst, const void *src, int *consumed, int src_size, int dst_size, int update_ctx)
int	ff_audio_resample (ResampleContext *c, AudioData *dst, AudioData *src)
	Resample audio data.
int	avresample_get_delay (AVAudioResampleContext *avr)
	Return the number of samples currently in the resampling delay buffer.

Macro Definition Documentation

#define CONFIG_RESAMPLE_DBL

Definition at line 54 of file resample.c.

#define CONFIG_RESAMPLE_FLT

Definition at line 59 of file resample.c.

#define CONFIG_RESAMPLE_S32

Definition at line 64 of file resample.c.

Function Documentation

static double bessel ( double  x )

static

Definition at line 73 of file resample.c.

Referenced by build_filter(), and ff_kbd_window_init().

static int build_filter ( ResampleContext *  c )

static

Definition at line 90 of file resample.c.

Referenced by ff_audio_resample_init().

ResampleContext* ff_audio_resample_init

(

AVAudioResampleContext *

avr

)

Allocate and initialize a ResampleContext.

The parameters in the AVAudioResampleContext are used to initialize the ResampleContext.

Parameters

avr	AVAudioResampleContext

Returns

newly-allocated ResampleContext

Definition at line 146 of file resample.c.

Referenced by avresample_open().

void ff_audio_resample_free

(

ResampleContext **

c

)

Free a ResampleContext.

Parameters

c	ResampleContext

Definition at line 238 of file resample.c.

Referenced by avresample_close().

static int resample ( ResampleContext *  c, void *  dst, const void *  src, int *  consumed, int  src_size, int  dst_size, int  update_ctx  )

static

Definition at line 332 of file resample.c.

Referenced by avfilter_register_all(), and ff_audio_resample().

int ff_audio_resample	(	ResampleContext *	c,
		AudioData *	dst,
		AudioData *	src
	)

Resample audio data.

Changes the sample rate.

All samples in the source data may not be consumed depending on the resampling parameters and the size of the output buffer. The unconsumed samples are automatically added to the start of the source in the next call. If the destination data can be reallocated, that may be done in this function in order to fit all available output. If it cannot be reallocated, fewer input samples will be consumed in order to have the output fit in the destination data buffers.

Parameters

c	ResampleContext
dst	destination audio data
src	source audio data

Returns

0 on success, negative AVERROR code on failure

Definition at line 409 of file resample.c.

Referenced by avresample_convert().