aacenc_ltp.c File Reference

AAC encoder long term prediction extension. More...

#include "aacenc_ltp.h"
#include "aacenc_quantization.h"
#include "aacenc_utils.h"

Go to the source code of this file.

Functions
void	ff_aac_encode_ltp_info (AACEncContext *s, SingleChannelElement *sce, int common_window)
	Encode LTP data. More...
void	ff_aac_ltp_insert_new_frame (AACEncContext *s)
static void	get_lag (float *buf, const float *new, LongTermPrediction *ltp)
static void	generate_samples (float *buf, LongTermPrediction *ltp)
void	ff_aac_update_ltp (AACEncContext *s, SingleChannelElement *sce)
	Process LTP parameters. More...
void	ff_aac_adjust_common_ltp (AACEncContext *s, ChannelElement *cpe)
void	ff_aac_search_for_ltp (AACEncContext *s, SingleChannelElement *sce, int common_window)
	Mark LTP sfb's. More...

Detailed Description

AAC encoder long term prediction extension.

Author

Rostislav Pehlivanov ( atomnuker gmail com )

Definition in file aacenc_ltp.c.

Function Documentation

ff_aac_encode_ltp_info()

void ff_aac_encode_ltp_info	(	AACEncContext *	s,
		SingleChannelElement *	sce,
		int	common_window
	)

Encode LTP data.

Definition at line 35 of file aacenc_ltp.c.

ff_aac_ltp_insert_new_frame()

void ff_aac_ltp_insert_new_frame

(

AACEncContext *

s

)

Definition at line 53 of file aacenc_ltp.c.

get_lag()

static void get_lag ( float *  buf, const float *  new, LongTermPrediction *  ltp  )

static

Definition at line 75 of file aacenc_ltp.c.

Referenced by ff_aac_update_ltp().

generate_samples()

static void generate_samples ( float *  buf, LongTermPrediction *  ltp  )

static

Definition at line 99 of file aacenc_ltp.c.

Referenced by ff_aac_update_ltp().

ff_aac_update_ltp()

void ff_aac_update_ltp	(	AACEncContext *	s,
		SingleChannelElement *	sce
	)

Process LTP parameters.

See also

Patent WO2006070265A1

Definition at line 117 of file aacenc_ltp.c.

ff_aac_adjust_common_ltp()

void ff_aac_adjust_common_ltp	(	AACEncContext *	s,
		ChannelElement *	cpe
	)

Definition at line 130 of file aacenc_ltp.c.

ff_aac_search_for_ltp()

void ff_aac_search_for_ltp	(	AACEncContext *	s,
		SingleChannelElement *	sce,
		int	common_window
	)

Mark LTP sfb's.

Definition at line 159 of file aacenc_ltp.c.