aacsbr.h File Reference

AAC Spectral Band Replication function declarations. More...

#include "get_bits.h"
#include "aac/aacdec.h"
#include "libavutil/attributes_internal.h"

Go to the source code of this file.

Macros
#define	ENVELOPE_ADJUSTMENT_OFFSET   2
#define	NOISE_FLOOR_OFFSET   6

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. More...
enum	{ FIXFIX , FIXVAR , VARFIX , VARVAR }
	bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98) More...
enum	{ EXTENSION_ID_PS = 2 }

Functions
FF_VISIBILITY_PUSH_HIDDEN void	ff_aac_sbr_init (void)
	Initialize SBR.
void	ff_aac_sbr_init_fixed (void)
int	ff_aac_sbr_ctx_alloc_init (AACDecContext *ac, ChannelElement **che, int id_aac)
	Allocate an ExtChannelElement (if necessary) and initialize the SBR context contained in it.
int	ff_aac_sbr_ctx_alloc_init_fixed (AACDecContext *ac, ChannelElement **che, int id_aac)
void	ff_aac_sbr_ctx_close (ChannelElement *che)
	Close the SBR context implicitly contained in a ChannelElement.
void	ff_aac_sbr_ctx_close_fixed (ChannelElement *che)
int	ff_aac_sbr_decode_extension (AACDecContext *ac, ChannelElement *che, GetBitContext *gb, int crc, int cnt, int id_aac, int fl960)
	Decode one SBR element.
int	ff_aac_sbr_decode_extension_fixed (AACDecContext *ac, ChannelElement *che, GetBitContext *gb, int crc, int cnt, int id_aac, int fl960)
int	ff_aac_sbr_config_usac (AACDecContext *ac, ChannelElement *che, AACUsacElemConfig *ue)
	Due to channel allocation not being known upon SBR parameter transmission, supply the parameters separately.
int	ff_aac_sbr_decode_usac_data (AACDecContext *ac, ChannelElement *che, AACUsacElemConfig *ue, GetBitContext *gb, int sbr_ch, int indep_flag)
	Decode frame SBR data, USAC.
void	ff_aac_sbr_apply (AACDecContext *ac, ChannelElement *che, int id_aac, int fl960, void *L, void *R)
	Apply one SBR element to one AAC element.
void	ff_aac_sbr_apply_fixed (AACDecContext *ac, ChannelElement *che, int id_aac, int fl960, void *L, void *R)

Detailed Description

AAC Spectral Band Replication function declarations.

Author

Robert Swain ( rob opendot cl )

Definition in file aacsbr.h.

Macro Definition Documentation

ENVELOPE_ADJUSTMENT_OFFSET

#define ENVELOPE_ADJUSTMENT_OFFSET   2

Definition at line 37 of file aacsbr.h.

Referenced by sbr_env_estimate(), sbr_hf_assemble(), sbr_hf_assemble(), sbr_hf_gen(), and sbr_x_gen().

NOISE_FLOOR_OFFSET

#define NOISE_FLOOR_OFFSET   6

Definition at line 38 of file aacsbr.h.

Referenced by sbr_dequant(), and sbr_dequant().

Enumeration Type Documentation

anonymous enum

anonymous enum

SBR VLC tables.

Enumerator
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

Definition at line 43 of file aacsbr.h.

anonymous enum

anonymous enum

bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98)

Enumerator
FIXFIX
FIXVAR
VARFIX
VARVAR

Definition at line 59 of file aacsbr.h.

anonymous enum

anonymous enum

Enumerator
EXTENSION_ID_PS

Definition at line 66 of file aacsbr.h.

Function Documentation

ff_aac_sbr_init()

FF_VISIBILITY_PUSH_HIDDEN void ff_aac_sbr_init

(

void

)

Initialize SBR.

Definition at line 52 of file aacsbr_template.c.

Referenced by ff_aac_sbr_init(), and init_tables_float_fn().

ff_aac_sbr_init_fixed()

void ff_aac_sbr_init_fixed

(

void

)

Referenced by init_tables_fixed_fn().

ff_aac_sbr_ctx_alloc_init()

int ff_aac_sbr_ctx_alloc_init	(	AACDecContext *	ac,
		ChannelElement **	che,
		int	id_aac )

Allocate an ExtChannelElement (if necessary) and initialize the SBR context contained in it.

Definition at line 70 of file aacsbr_template.c.

Referenced by ff_aac_sbr_ctx_alloc_init().

ff_aac_sbr_ctx_alloc_init_fixed()

int ff_aac_sbr_ctx_alloc_init_fixed	(	AACDecContext *	ac,
		ChannelElement **	che,
		int	id_aac )

ff_aac_sbr_ctx_close()

void ff_aac_sbr_ctx_close

(

ChannelElement *

che

)

Close the SBR context implicitly contained in a ChannelElement.

Definition at line 115 of file aacsbr_template.c.

Referenced by ff_aac_sbr_ctx_close().

ff_aac_sbr_ctx_close_fixed()

void ff_aac_sbr_ctx_close_fixed

(

ChannelElement *

che

)

ff_aac_sbr_decode_extension()

int ff_aac_sbr_decode_extension	(	AACDecContext *	ac,
		ChannelElement *	che,
		GetBitContext *	gb_host,
		int	crc,
		int	cnt,
		int	id_aac,
		int	fl960 )

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.

Definition at line 1133 of file aacsbr_template.c.

Referenced by ff_aac_sbr_decode_extension().

ff_aac_sbr_decode_extension_fixed()

int ff_aac_sbr_decode_extension_fixed	(	AACDecContext *	ac,
		ChannelElement *	che,
		GetBitContext *	gb,
		int	crc,
		int	cnt,
		int	id_aac,
		int	fl960 )

ff_aac_sbr_config_usac()

int ff_aac_sbr_config_usac	(	AACDecContext *	ac,
		ChannelElement *	che,
		AACUsacElemConfig *	ue )

Due to channel allocation not being known upon SBR parameter transmission, supply the parameters separately.

Functionally identical to ff_aac_sbr_decode_extension()

Definition at line 1201 of file aacsbr_template.c.

Referenced by ff_aac_usac_reset_state().

ff_aac_sbr_decode_usac_data()

int ff_aac_sbr_decode_usac_data	(	AACDecContext *	ac,
		ChannelElement *	che,
		AACUsacElemConfig *	ue,
		GetBitContext *	gb,
		int	sbr_ch,
		int	indep_flag )

Decode frame SBR data, USAC.

Definition at line 1209 of file aacsbr_template.c.

Referenced by decode_usac_core_coder().

ff_aac_sbr_apply()

void ff_aac_sbr_apply	(	AACDecContext *	ac,
		ChannelElement *	che,
		int	id_aac,
		int	fl960,
		void *	L,
		void *	R )

Apply one SBR element to one AAC element.

Definition at line 1685 of file aacsbr_template.c.

Referenced by ff_aac_sbr_apply().

ff_aac_sbr_apply_fixed()

void ff_aac_sbr_apply_fixed	(	AACDecContext *	ac,
		ChannelElement *	che,
		int	id_aac,
		int	fl960,
		void *	L,
		void *	R )