aacsbr.h File Reference

AAC Spectral Band Replication function declarations. More...

#include "get_bits.h"
#include "aac.h"
#include "sbr.h"

Go to the source code of this file.

Macros
#define	ENVELOPE_ADJUSTMENT_OFFSET   2
#define	NOISE_FLOOR_OFFSET   6
#define	SBR_INIT_VLC_STATIC(num, size)
#define	SBR_VLC_ROW(name)   { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }

Enumerations
enum	{   T_HUFFMAN_ENV_1_5DB, F_HUFFMAN_ENV_1_5DB, T_HUFFMAN_ENV_BAL_1_5DB, F_HUFFMAN_ENV_BAL_1_5DB,   T_HUFFMAN_ENV_3_0DB, F_HUFFMAN_ENV_3_0DB, T_HUFFMAN_ENV_BAL_3_0DB, F_HUFFMAN_ENV_BAL_3_0DB,   T_HUFFMAN_NOISE_3_0DB, T_HUFFMAN_NOISE_BAL_3_0DB }
	SBR VLC tables.
enum	{ FIXFIX, FIXVAR, VARFIX, VARVAR }
	bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98)
enum	{ EXTENSION_ID_PS = 2 }

Functions
void AAC_RENAME()	ff_aac_sbr_init (void)
	Initialize SBR. More...
void AAC_RENAME()	ff_aac_sbr_ctx_init (AACContext *ac, SpectralBandReplication *sbr, int id_aac)
	Initialize one SBR context. More...
void AAC_RENAME()	ff_aac_sbr_ctx_close (SpectralBandReplication *sbr)
	Close one SBR context. More...
int AAC_RENAME()	ff_decode_sbr_extension (AACContext *ac, SpectralBandReplication *sbr, GetBitContext *gb, int crc, int cnt, int id_aac)
	Decode one SBR element. More...
void AAC_RENAME()	ff_sbr_apply (AACContext *ac, SpectralBandReplication *sbr, int id_aac, INTFLOAT *L, INTFLOAT *R)
	Apply one SBR element to one AAC element. More...
void	ff_aacsbr_func_ptr_init_mips (AACSBRContext *c)

Detailed Description

AAC Spectral Band Replication function declarations.

Author

Robert Swain ( rob opendot cl )

Macro Definition Documentation

SBR_INIT_VLC_STATIC

#define SBR_INIT_VLC_STATIC	(		num,
			size
	)

Value:

INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size,     \
                    sbr_tmp[num].sbr_bits ,                      1,                      1, \
                    sbr_tmp[num].sbr_codes, sbr_tmp[num].elem_size, sbr_tmp[num].elem_size, \
                    size)

Function Documentation

ff_aac_sbr_ctx_close()

void AAC_RENAME() ff_aac_sbr_ctx_close

(

SpectralBandReplication *

sbr

)

Close one SBR context.

ff_aac_sbr_ctx_init()

void AAC_RENAME() ff_aac_sbr_ctx_init	(	AACContext *	ac,
		SpectralBandReplication *	sbr,
		int	id_aac
	)

Initialize one SBR context.

ff_aac_sbr_init()

void AAC_RENAME() ff_aac_sbr_init

(

void

)

Initialize SBR.

ff_decode_sbr_extension()

int AAC_RENAME() ff_decode_sbr_extension	(	AACContext *	ac,
		SpectralBandReplication *	sbr,
		GetBitContext *	gb_host,
		int	crc,
		int	cnt,
		int	id_aac
	)

Decode one SBR element.

Decode one SBR element.

Parameters

crc	flag indicating the presence of CRC checksum
cnt	length of TYPE_FIL syntactic element in bytes

Returns

Returns number of bytes consumed from the TYPE_FIL element.

ff_sbr_apply()

void AAC_RENAME() ff_sbr_apply	(	AACContext *	ac,
		SpectralBandReplication *	sbr,
		int	id_aac,
		INTFLOAT *	L,
		INTFLOAT *	R
	)

Apply one SBR element to one AAC element.