aaccommon.h 文件参考

#include "aacdec.h"
#include "aacstatname.h"

浏览源代码.

结构体
struct	_AACDecInfo

宏定义
#define	SYNCWORDH   0xff
#define	SYNCWORDL   0xf0
#define	MAX_NCHANS_ELEM   2 /* max number of channels in any single bitstream element (SCE,CPE,CCE,LFE) */
#define	ADTS_HEADER_BYTES   7
#define	NUM_SAMPLE_RATES   12
#define	NUM_DEF_CHAN_MAPS   8
#define	NUM_ELEMENTS   8
#define	MAX_NUM_PCE_ADIF   16
#define	MAX_WIN_GROUPS   8
#define	MAX_SFB_SHORT   15
#define	MAX_SF_BANDS   (MAX_SFB_SHORT*MAX_WIN_GROUPS) /* worst case = 15 sfb's * 8 windows for short block */
#define	MAX_MS_MASK_BYTES   ((MAX_SF_BANDS + 7) >> 3)
#define	MAX_PRED_SFB   41
#define	MAX_TNS_FILTERS   8
#define	MAX_TNS_COEFS   60
#define	MAX_TNS_ORDER   20
#define	MAX_PULSES   4
#define	MAX_GAIN_BANDS   3
#define	MAX_GAIN_WIN   8
#define	MAX_GAIN_ADJUST   7
#define	NSAMPS_LONG   1024
#define	NSAMPS_SHORT   128
#define	NUM_SYN_ID_BITS   3
#define	NUM_INST_TAG_BITS   4
#define	EXT_SBR_DATA   0x0d
#define	EXT_SBR_DATA_CRC   0x0e
#define	IS_ADIF(p)   ((p)[0] == 'A' && (p)[1] == 'D' && (p)[2] == 'I' && (p)[3] == 'F')
#define	GET_ELE_ID(p)   ((AACElementID)(*(p) >> (8-NUM_SYN_ID_BITS)))

类型定义
typedef struct _AACDecInfo	AACDecInfo

枚举
enum	{   AAC_FF_Unknown = 0,   AAC_FF_ADTS = 1,   AAC_FF_ADIF = 2,   AAC_FF_RAW = 3 }
enum	{   AAC_ID_INVALID = -1,   AAC_ID_SCE = 0,   AAC_ID_CPE = 1,   AAC_ID_CCE = 2,   AAC_ID_LFE = 3,   AAC_ID_DSE = 4,   AAC_ID_PCE = 5,   AAC_ID_FIL = 6,   AAC_ID_END = 7 }

函数
AACDecInfo *	raac_AllocateBuffers (void)
void	raac_FreeBuffers (AACDecInfo *aacDecInfo)
void	raac_ClearBuffers (AACDecInfo *aacDecInfo)
void	raac_ClearBuffer (void *buf, int nBytes)
int	raac_UnpackADTSHeader (AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail)
int	raac_GetADTSChannelMapping (AACDecInfo *aacDecInfo, unsigned char *buf, int bitOffset, int bitsAvail)
int	raac_UnpackADIFHeader (AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail)
int	raac_SetRawBlockParams (AACDecInfo *aacDecInfo, int copyLast, int nChans, int sampRate, int profile)
int	raac_PrepareRawBlock (AACDecInfo *aacDecInfo)
int	raac_FlushCodec (AACDecInfo *aacDecInfo)
int	raac_DecodeNextElement (AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail)
int	raac_DecodeNoiselessData (AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail, int ch)
int	raac_Dequantize (AACDecInfo *aacDecInfo, int ch)
int	raac_StereoProcess (AACDecInfo *aacDecInfo)
int	raac_DeinterleaveShortBlocks (AACDecInfo *aacDecInfo, int ch)
int	raac_PNS (AACDecInfo *aacDecInfo, int ch)
int	raac_TNSFilter (AACDecInfo *aacDecInfo, int ch)
int	raac_IMDCT (AACDecInfo *aacDecInfo, int ch, int chBase, short *outbuf)
int	raac_InitSBR (AACDecInfo *aacDecInfo)
void	raac_FreeSBR (AACDecInfo *aacDecInfo)
int	raac_DecodeSBRBitstream (AACDecInfo *aacDecInfo, int chBase)
int	raac_DecodeSBRData (AACDecInfo *aacDecInfo, int chBase, short *outbuf)
int	raac_FlushCodecSBR (AACDecInfo *aacDecInfo)

变量
const int	raac_sampRateTab [12]
const int	raac_predSFBMax [12]
const int	raac_channelMapTab [8]
const int	raac_elementNumChans [8]
const unsigned char	raac_sfBandTotalShort [12]
const unsigned char	raac_sfBandTotalLong [12]
const int	raac_sfBandTabShortOffset [12]
const int	raac_sfBandTabShortTabSize [12]
const short	raac_sfBandTabShort [76]
const int	raac_sfBandTabLongOffset [12]
const int	raac_sfBandTabLongTabSize [12]
const short	raac_sfBandTabLong [325]
const int	raac_tnsMaxBandsShortOffset [3]
const unsigned char	raac_tnsMaxBandsShort [2 *12]
const unsigned char	raac_tnsMaxOrderShort [3]
const int	raac_tnsMaxBandsLongOffset [3]
const unsigned char	raac_tnsMaxBandsLong [2 *12]
const unsigned char	raac_tnsMaxOrderLong [3]

---

结构体说明

_AACDecInfo

struct _AACDecInfo

成员变量
int	adtsBlocksLeft
int	bitRate
int	currBlockID
int	currInstTag
unsigned char *	fillBuf
int	fillCount
int	fillExtType
int	format
int	frameCount
int	nChans
int	pnsUsed
int	prevBlockID
int	profile
void *	psInfoBase
void *	psInfoSBR
void *	rawSampleBuf[2]
int	rawSampleBytes
int	rawSampleFBits
int	sampRate
int	sbDeinterleaveReqd[2]
int	sbrEnabled
int	tnsUsed

宏定义说明

ADTS_HEADER_BYTES

#define ADTS_HEADER_BYTES   7

EXT_SBR_DATA

#define EXT_SBR_DATA   0x0d

EXT_SBR_DATA_CRC

#define EXT_SBR_DATA_CRC   0x0e

GET_ELE_ID

#define GET_ELE_ID

(

p

)

((AACElementID)(*(p) >> (8-NUM_SYN_ID_BITS)))

IS_ADIF

#define IS_ADIF

(

p

)

((p)[0] == 'A' && (p)[1] == 'D' && (p)[2] == 'I' && (p)[3] == 'F')

MAX_GAIN_ADJUST

#define MAX_GAIN_ADJUST   7

MAX_GAIN_BANDS

#define MAX_GAIN_BANDS   3

MAX_GAIN_WIN

#define MAX_GAIN_WIN   8

MAX_MS_MASK_BYTES

#define MAX_MS_MASK_BYTES   ((MAX_SF_BANDS + 7) >> 3)

MAX_NCHANS_ELEM

#define MAX_NCHANS_ELEM   2 /* max number of channels in any single bitstream element (SCE,CPE,CCE,LFE) */

MAX_NUM_PCE_ADIF

#define MAX_NUM_PCE_ADIF   16

MAX_PRED_SFB

#define MAX_PRED_SFB   41

MAX_PULSES

#define MAX_PULSES   4

MAX_SF_BANDS

#define MAX_SF_BANDS   (MAX_SFB_SHORT*MAX_WIN_GROUPS) /* worst case = 15 sfb's * 8 windows for short block */

MAX_SFB_SHORT

#define MAX_SFB_SHORT   15

MAX_TNS_COEFS

#define MAX_TNS_COEFS   60

MAX_TNS_FILTERS

#define MAX_TNS_FILTERS   8

MAX_TNS_ORDER

#define MAX_TNS_ORDER   20

MAX_WIN_GROUPS

#define MAX_WIN_GROUPS   8

NSAMPS_LONG

#define NSAMPS_LONG   1024

NSAMPS_SHORT

#define NSAMPS_SHORT   128

NUM_DEF_CHAN_MAPS

#define NUM_DEF_CHAN_MAPS   8

NUM_ELEMENTS

#define NUM_ELEMENTS   8

NUM_INST_TAG_BITS

#define NUM_INST_TAG_BITS   4

NUM_SAMPLE_RATES

#define NUM_SAMPLE_RATES   12

NUM_SYN_ID_BITS

#define NUM_SYN_ID_BITS   3

SYNCWORDH

#define SYNCWORDH   0xff

SYNCWORDL

#define SYNCWORDL   0xf0

类型定义说明

AACDecInfo

typedef struct _AACDecInfo AACDecInfo

枚举类型说明

anonymous enum

anonymous enum

枚举值
AAC_FF_Unknown
AAC_FF_ADTS
AAC_FF_ADIF
AAC_FF_RAW

anonymous enum

anonymous enum

枚举值
AAC_ID_INVALID
AAC_ID_SCE
AAC_ID_CPE
AAC_ID_CCE
AAC_ID_LFE
AAC_ID_DSE
AAC_ID_PCE
AAC_ID_FIL
AAC_ID_END

函数说明

raac_AllocateBuffers()

AACDecInfo* raac_AllocateBuffers

(

void

)

raac_ClearBuffer()

void raac_ClearBuffer	(	void *	buf,
		int	nBytes
	)

raac_ClearBuffers()

void raac_ClearBuffers

(

AACDecInfo *

aacDecInfo

)

raac_DecodeNextElement()

int raac_DecodeNextElement	(	AACDecInfo *	aacDecInfo,
		unsigned char **	buf,
		int *	bitOffset,
		int *	bitsAvail
	)

raac_DecodeNoiselessData()

int raac_DecodeNoiselessData	(	AACDecInfo *	aacDecInfo,
		unsigned char **	buf,
		int *	bitOffset,
		int *	bitsAvail,
		int	ch
	)

raac_DecodeSBRBitstream()

int raac_DecodeSBRBitstream	(	AACDecInfo *	aacDecInfo,
		int	chBase
	)

raac_DecodeSBRData()

int raac_DecodeSBRData	(	AACDecInfo *	aacDecInfo,
		int	chBase,
		short *	outbuf
	)

raac_DeinterleaveShortBlocks()

int raac_DeinterleaveShortBlocks	(	AACDecInfo *	aacDecInfo,
		int	ch
	)

raac_Dequantize()

int raac_Dequantize	(	AACDecInfo *	aacDecInfo,
		int	ch
	)

raac_FlushCodec()

int raac_FlushCodec

(

AACDecInfo *

aacDecInfo

)

raac_FlushCodecSBR()

int raac_FlushCodecSBR

(

AACDecInfo *

aacDecInfo

)

raac_FreeBuffers()

void raac_FreeBuffers

(

AACDecInfo *

aacDecInfo

)

raac_FreeSBR()

void raac_FreeSBR

(

AACDecInfo *

aacDecInfo

)

raac_GetADTSChannelMapping()

int raac_GetADTSChannelMapping	(	AACDecInfo *	aacDecInfo,
		unsigned char *	buf,
		int	bitOffset,
		int	bitsAvail
	)

raac_IMDCT()

int raac_IMDCT	(	AACDecInfo *	aacDecInfo,
		int	ch,
		int	chBase,
		short *	outbuf
	)

raac_InitSBR()

int raac_InitSBR

(

AACDecInfo *

aacDecInfo

)

raac_PNS()

int raac_PNS	(	AACDecInfo *	aacDecInfo,
		int	ch
	)

raac_PrepareRawBlock()

int raac_PrepareRawBlock

(

AACDecInfo *

aacDecInfo

)

raac_SetRawBlockParams()

int raac_SetRawBlockParams	(	AACDecInfo *	aacDecInfo,
		int	copyLast,
		int	nChans,
		int	sampRate,
		int	profile
	)

raac_StereoProcess()

int raac_StereoProcess

(

AACDecInfo *

aacDecInfo

)

raac_TNSFilter()

int raac_TNSFilter	(	AACDecInfo *	aacDecInfo,
		int	ch
	)

raac_UnpackADIFHeader()

int raac_UnpackADIFHeader	(	AACDecInfo *	aacDecInfo,
		unsigned char **	buf,
		int *	bitOffset,
		int *	bitsAvail
	)

raac_UnpackADTSHeader()

int raac_UnpackADTSHeader	(	AACDecInfo *	aacDecInfo,
		unsigned char **	buf,
		int *	bitOffset,
		int *	bitsAvail
	)

变量说明

raac_channelMapTab

const int raac_channelMapTab[8]

raac_elementNumChans

const int raac_elementNumChans[8]

raac_predSFBMax

const int raac_predSFBMax[12]

raac_sampRateTab

const int raac_sampRateTab[12]

raac_sfBandTabLong

const short raac_sfBandTabLong[325]

raac_sfBandTabLongOffset

const int raac_sfBandTabLongOffset[12]

raac_sfBandTabLongTabSize

const int raac_sfBandTabLongTabSize[12]

raac_sfBandTabShort

const short raac_sfBandTabShort[76]

raac_sfBandTabShortOffset

const int raac_sfBandTabShortOffset[12]

raac_sfBandTabShortTabSize

const int raac_sfBandTabShortTabSize[12]

raac_sfBandTotalLong

const unsigned char raac_sfBandTotalLong[12]

raac_sfBandTotalShort

const unsigned char raac_sfBandTotalShort[12]

raac_tnsMaxBandsLong

const unsigned char raac_tnsMaxBandsLong[2 *12]

raac_tnsMaxBandsLongOffset

const int raac_tnsMaxBandsLongOffset[3]

raac_tnsMaxBandsShort

const unsigned char raac_tnsMaxBandsShort[2 *12]

raac_tnsMaxBandsShortOffset

const int raac_tnsMaxBandsShortOffset[3]

raac_tnsMaxOrderLong

const unsigned char raac_tnsMaxOrderLong[3]

raac_tnsMaxOrderShort

const unsigned char raac_tnsMaxOrderShort[3]