aacsbr.h File Reference

#include "get_bits.h"
#include "aac/aacdec.h"
#include "aac_defines.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. More...
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. More...
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. More...
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)
	Decode one SBR element. More...
int	ff_aac_sbr_decode_extension_fixed (AACDecContext *ac, ChannelElement *che, GetBitContext *gb, int crc, int cnt, int id_aac)
void	ff_aac_sbr_apply (AACDecContext *ac, ChannelElement *che, int id_aac, INTFLOAT *L, INTFLOAT *R)
	Apply one SBR element to one AAC element. More...
void	ff_aac_sbr_apply_fixed (AACDecContext *ac, ChannelElement *che, int id_aac, INTFLOAT *L, INTFLOAT *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 38 of file aacsbr.h.

NOISE_FLOOR_OFFSET

#define NOISE_FLOOR_OFFSET   6

Definition at line 39 of file aacsbr.h.

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 44 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 60 of file aacsbr.h.

anonymous enum

anonymous enum

Enumerator
EXTENSION_ID_PS

Definition at line 67 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 init_tables_fixed_fn(), and init_tables_float_fn().

ff_aac_sbr_init_fixed()

void ff_aac_sbr_init_fixed

(

void

)

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 69 of file aacsbr_template.c.

Referenced by che_configure().

ff_aac_sbr_ctx_alloc_init_fixed()

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

Referenced by che_configure().

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 114 of file aacsbr_template.c.

Referenced by che_configure(), and decode_close().

ff_aac_sbr_ctx_close_fixed()

void ff_aac_sbr_ctx_close_fixed

(

ChannelElement *

che

)

Referenced by che_configure(), and decode_close().

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
	)

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 1103 of file aacsbr_template.c.

Referenced by decode_extension_payload().

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
	)

Referenced by decode_extension_payload().

ff_aac_sbr_apply()

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

Apply one SBR element to one AAC element.

Definition at line 1471 of file aacsbr_template.c.

Referenced by spectral_to_sample().

ff_aac_sbr_apply_fixed()

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

Referenced by spectral_to_sample().