aacsbr.h 文件参考

#include "aaccommon.h"
#include "aacbitstream.h"

浏览源代码.

结构体
struct	_HuffInfo
struct	_SBRHeader
struct	_SBRGrid
struct	_SBRFreq
struct	_SBRChan
struct	_PSInfoSBR

宏定义
#define	ASSERT(x)   /* do nothing */
#define	MAX(a, b)   ((a) > (b) ? (a) : (b))
#define	MIN(a, b)   ((a) < (b) ? (a) : (b))
#define	NUM_TIME_SLOTS   16
#define	SAMPLES_PER_SLOT   2 /* RATE in spec */
#define	NUM_SAMPLE_RATES_SBR   9 /* downsampled (single-rate) mode unsupported, so only use Fs_sbr >= 16 kHz */
#define	MAX_NUM_ENV   5
#define	MAX_NUM_NOISE_FLOORS   2
#define	MAX_NUM_NOISE_FLOOR_BANDS   5 /* max Nq, see 4.6.18.3.6 */
#define	MAX_NUM_PATCHES   5
#define	MAX_NUM_SMOOTH_COEFS   5
#define	HF_GEN   8
#define	HF_ADJ   2
#define	MAX_QMF_BANDS   48 /* max QMF subbands covered by SBR (4.6.18.3.6) */
#define	FBITS_IN_QMFA   14
#define	FBITS_LOST_QMFA   (1 + 2 + 3 + 2 + 1) /* 1 from cTab, 2 in premul, 3 in FFT, 2 in postmul, 1 for implicit scaling by 2.0 */
#define	FBITS_OUT_QMFA   (FBITS_IN_QMFA - FBITS_LOST_QMFA)
#define	MIN_GBITS_IN_QMFS   2
#define	FBITS_IN_QMFS   FBITS_OUT_QMFA
#define	FBITS_LOST_DCT4_64   (2 + 3 + 2) /* 2 in premul, 3 in FFT, 2 in postmul */
#define	FBITS_OUT_DQ_ENV   29 /* dequantized env scalefactors are Q(29 - envDataDequantScale) */
#define	FBITS_OUT_DQ_NOISE   24 /* range of Q_orig = [2^-24, 2^6] */
#define	NOISE_FLOOR_OFFSET   6
#define	FBITS_GLIM_BOOST   24
#define	FBITS_QLIM_BOOST   14
#define	MAX_HUFF_BITS   20
#define	NUM_QMF_DELAY_BUFS   10
#define	DELAY_SAMPS_QMFA   (NUM_QMF_DELAY_BUFS * 32)
#define	DELAY_SAMPS_QMFS   (NUM_QMF_DELAY_BUFS * 128)
#define	FFT32C   STATNAME(FFT32C)
#define	CalcFreqTables   STATNAME(CalcFreqTables)
#define	AdjustHighFreq   STATNAME(AdjustHighFreq)
#define	GenerateHighFreq   STATNAME(GenerateHighFreq)
#define	DecodeSBREnvelope   STATNAME(DecodeSBREnvelope)
#define	DecodeSBRNoise   STATNAME(DecodeSBRNoise)
#define	UncoupleSBREnvelope   STATNAME(UncoupleSBREnvelope)
#define	UncoupleSBRNoise   STATNAME(UncoupleSBRNoise)
#define	InvRNormalized   STATNAME(InvRNormalized)
#define	RatioPowInv   STATNAME(RatioPowInv)
#define	SqrtFix   STATNAME(SqrtFix)
#define	QMFAnalysis   STATNAME(QMFAnalysis)
#define	QMFSynthesis   STATNAME(QMFSynthesis)
#define	GetSampRateIdx   STATNAME(GetSampRateIdx)
#define	UnpackSBRHeader   STATNAME(UnpackSBRHeader)
#define	UnpackSBRSingleChannel   STATNAME(UnpackSBRSingleChannel)
#define	UnpackSBRChannelPair   STATNAME(UnpackSBRChannelPair)
#define	CVKernel1   STATNAME(CVKernel1)
#define	CVKernel2   STATNAME(CVKernel2)
#define	QMFAnalysisConv   STATNAME(QMFAnalysisConv)
#define	QMFSynthesisConv   STATNAME(QMFSynthesisConv)
#define	k0Tab   STATNAME(k0Tab)
#define	k2Tab   STATNAME(k2Tab)
#define	goalSBTab   STATNAME(goalSBTab)
#define	huffTabSBR   STATNAME(huffTabSBR)
#define	huffTabSBRInfo   STATNAME(huffTabSBRInfo)
#define	log2Tab   STATNAME(log2Tab)
#define	noiseTab   STATNAME(noiseTab)
#define	cTabA   STATNAME(cTabA)
#define	cTabS   STATNAME(cTabS)
#define	CLIP_2N_SHIFT30(y, n)
#define	CLIP_2N(y, n)

类型定义
typedef struct _HuffInfo	HuffInfo
typedef struct _SBRHeader	SBRHeader
typedef struct _SBRGrid	SBRGrid
typedef struct _SBRFreq	SBRFreq
typedef struct _SBRChan	SBRChan
typedef struct _PSInfoSBR	PSInfoSBR

枚举
enum	{   SBR_GRID_FIXFIX = 0,   SBR_GRID_FIXVAR = 1,   SBR_GRID_VARFIX = 2,   SBR_GRID_VARVAR = 3 }
enum	{   HuffTabSBR_tEnv15 = 0,   HuffTabSBR_fEnv15 = 1,   HuffTabSBR_tEnv15b = 2,   HuffTabSBR_fEnv15b = 3,   HuffTabSBR_tEnv30 = 4,   HuffTabSBR_fEnv30 = 5,   HuffTabSBR_tEnv30b = 6,   HuffTabSBR_fEnv30b = 7,   HuffTabSBR_tNoise30 = 8,   HuffTabSBR_fNoise30 = 5,   HuffTabSBR_tNoise30b = 9,   HuffTabSBR_fNoise30b = 7 }

函数
void STATNAME()	FFT32C (int *x)
int STATNAME()	CalcFreqTables (SBRHeader *sbrHdr, SBRFreq *sbrFreq, int sampRateIdx)
void STATNAME()	AdjustHighFreq (PSInfoSBR *psi, SBRHeader *sbrHdr, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch)
void STATNAME()	GenerateHighFreq (PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch)
void STATNAME()	DecodeSBREnvelope (BitStreamInfo *bsi, PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch)
void STATNAME()	DecodeSBRNoise (BitStreamInfo *bsi, PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch)
void STATNAME()	UncoupleSBREnvelope (PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChanR)
void STATNAME()	UncoupleSBRNoise (PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChanR)
int STATNAME()	InvRNormalized (int r)
int STATNAME()	RatioPowInv (int a, int b, int c)
int STATNAME()	SqrtFix (int x, int fBitsIn, int *fBitsOut)
int STATNAME()	QMFAnalysis (int *inbuf, int *delay, int *XBuf, int fBitsIn, int *delayIdx, int qmfaBands)
void STATNAME()	QMFSynthesis (int *inbuf, int *delay, int *delayIdx, int qmfsBands, short *outbuf, int nChans)
int STATNAME()	GetSampRateIdx (int sampRate)
int STATNAME()	UnpackSBRHeader (BitStreamInfo *bsi, SBRHeader *sbrHdr)
void STATNAME()	UnpackSBRSingleChannel (BitStreamInfo *bsi, PSInfoSBR *psi, int chOut)
void STATNAME()	UnpackSBRChannelPair (BitStreamInfo *bsi, PSInfoSBR *psi, int chOut)
const unsigned char	STATNAME (k0Tab) [9][16]
const unsigned char	STATNAME (k2Tab) [9][14]
const unsigned char	STATNAME (goalSBTab) [9]
const HuffInfo	STATNAME (huffTabSBRInfo) [10]
const signed short	STATNAME (huffTabSBR) [604]
const int	STATNAME (log2Tab) [65]
const int	STATNAME (noiseTab) [512 *2]
const int	STATNAME (cTabA) [165]
const int	STATNAME (cTabS) [640]

---

结构体说明

_HuffInfo

struct _HuffInfo

成员变量
unsigned char	count[20]
int	maxBits
int	offset

_SBRHeader

struct _SBRHeader

成员变量
unsigned char	alterScale
unsigned char	ampRes
int	count
unsigned char	crossOverBand
unsigned char	freqScale
unsigned char	hdrExtra1
unsigned char	hdrExtra2
unsigned char	interpFreq
unsigned char	limiterBands
unsigned char	limiterGains
unsigned char	noiseBands
unsigned char	resBitsHdr
unsigned char	smoothMode
unsigned char	startFreq
unsigned char	stopFreq

_SBRGrid

struct _SBRGrid

成员变量
unsigned char	ampResFrame
unsigned char	envTimeBorder[5+1]
unsigned char	frameClass
unsigned char	freqRes[5]
unsigned char	freqResPrev
unsigned char	noiseTimeBorder[2+1]
unsigned char	numEnv
unsigned char	numEnvPrev
unsigned char	numNoiseFloors
unsigned char	numNoiseFloorsPrev
unsigned char	pointer

_SBRFreq

struct _SBRFreq

成员变量
unsigned char	freqHigh[48+1]
unsigned char	freqLimiter[48/2+5]
unsigned char	freqLow[48/2+1]
unsigned char	freqMaster[48+1]
unsigned char	freqNoise[5+1]
int	kStart
int	kStartPrev
int	nHigh
int	nLimiter
int	nLow
int	nMaster
int	numNoiseFloorBands
unsigned char	numPatches
int	numQMFBands
int	numQMFBandsPrev
unsigned char	patchNumSubbands[5+1]
unsigned char	patchStartSubband[5+1]

_SBRChan

struct _SBRChan

成员变量
unsigned char	addHarmonic[2][64]
unsigned char	addHarmonicFlag[2]
int	chirpFact[5]
unsigned char	deltaFlagEnv[5]
unsigned char	deltaFlagNoise[2]
signed char	envDataQuant[5][48]
int	gainNoiseIndex
int	gbMask[2]
int	gTemp[5][48]
unsigned char	invfMode[2][5]
signed char	laPrev
signed char	noiseDataQuant[2][5]
int	noiseTabIndex
int	qTemp[5][48]
int	reset
int	sinIndex

_PSInfoSBR

struct _PSInfoSBR

成员变量
int	couplingFlag
int	crcCheckWord
unsigned char	dataExtra
int	delayIdxQMFA[AAC_MAX_NCHANS]
int	delayIdxQMFS[AAC_MAX_NCHANS]
int	delayQMFA[AAC_MAX_NCHANS][(10 *32)]
int	delayQMFS[AAC_MAX_NCHANS][(10 *128)]
int	eCurr[48]
unsigned char	eCurrExp[48]
unsigned char	eCurrExpMax
int	envBand
int	envDataDequant[MAX_NCHANS_ELEM][5][48]
signed char	envDataDequantScale[MAX_NCHANS_ELEM][5]
int	eOMGainMax
unsigned char	extendedDataPresent
int	extendedDataSize
int	frameCount
int	gainMax
int	gainMaxFBits
int	gFiltLast[48]
int	gLimBoost[48]
int	gLimBuf[48]
int	gLimFbits[48]
int	highBand
signed char	la
int	noiseDataDequant[MAX_NCHANS_ELEM][2][5]
int	noiseFloorBand
int	qFiltLast[48]
int	qmLimBoost[48]
int	qmLimBuf[48]
int	qp1Inv
int	qqp1Inv
unsigned char	resBitsData
int	sampRateIdx
int	sBand
SBRChan	sbrChan[AAC_MAX_NCHANS]
SBRFreq	sbrFreq[AAC_MAX_NCHANS]
SBRGrid	sbrGrid[AAC_MAX_NCHANS]
SBRHeader	sbrHdr[AAC_MAX_NCHANS]
int	sMapped
int	smBoost[48]
int	smBuf[48]
int	sumECurrGLim
int	sumEOrigMapped
int	sumQM
int	sumSM
int	XBuf[32+8][64][2]
int	XBufDelay[AAC_MAX_NCHANS][8][64][2]

宏定义说明

AdjustHighFreq

#define AdjustHighFreq   STATNAME(AdjustHighFreq)

ASSERT

#define ASSERT

(

x

)

/* do nothing */

CalcFreqTables

#define CalcFreqTables   STATNAME(CalcFreqTables)

CLIP_2N

#define CLIP_2N	(		y,
			n
	)

值:

{ \
    int sign = (y) >> 31;  \
    if (sign != ((y) >> (n)))  { \
        (y) = sign ^ ((1 << (n)) - 1); \
    } \
}

CLIP_2N_SHIFT30

#define CLIP_2N_SHIFT30	(		y,
			n
	)

值:

{ \
    int sign = (y) >> 31;  \
    if (sign != (y) >> (30 - (n)))  { \
        (y) = sign ^ (0x3fffffff); \
    } else { \
        (y) = (y) << (n); \
    } \
}

cTabA

#define cTabA   STATNAME(cTabA)

cTabS

#define cTabS   STATNAME(cTabS)

CVKernel1

#define CVKernel1   STATNAME(CVKernel1)

CVKernel2

#define CVKernel2   STATNAME(CVKernel2)

DecodeSBREnvelope

#define DecodeSBREnvelope   STATNAME(DecodeSBREnvelope)

DecodeSBRNoise

#define DecodeSBRNoise   STATNAME(DecodeSBRNoise)

DELAY_SAMPS_QMFA

#define DELAY_SAMPS_QMFA   (NUM_QMF_DELAY_BUFS * 32)

DELAY_SAMPS_QMFS

#define DELAY_SAMPS_QMFS   (NUM_QMF_DELAY_BUFS * 128)

FBITS_GLIM_BOOST

#define FBITS_GLIM_BOOST   24

FBITS_IN_QMFA

#define FBITS_IN_QMFA   14

FBITS_IN_QMFS

#define FBITS_IN_QMFS   FBITS_OUT_QMFA

FBITS_LOST_DCT4_64

#define FBITS_LOST_DCT4_64   (2 + 3 + 2) /* 2 in premul, 3 in FFT, 2 in postmul */

FBITS_LOST_QMFA

#define FBITS_LOST_QMFA   (1 + 2 + 3 + 2 + 1) /* 1 from cTab, 2 in premul, 3 in FFT, 2 in postmul, 1 for implicit scaling by 2.0 */

FBITS_OUT_DQ_ENV

#define FBITS_OUT_DQ_ENV   29 /* dequantized env scalefactors are Q(29 - envDataDequantScale) */

FBITS_OUT_DQ_NOISE

#define FBITS_OUT_DQ_NOISE   24 /* range of Q_orig = [2^-24, 2^6] */

FBITS_OUT_QMFA

#define FBITS_OUT_QMFA   (FBITS_IN_QMFA - FBITS_LOST_QMFA)

FBITS_QLIM_BOOST

#define FBITS_QLIM_BOOST   14

FFT32C

#define FFT32C   STATNAME(FFT32C)

GenerateHighFreq

#define GenerateHighFreq   STATNAME(GenerateHighFreq)

GetSampRateIdx

#define GetSampRateIdx   STATNAME(GetSampRateIdx)

goalSBTab

#define goalSBTab   STATNAME(goalSBTab)

HF_ADJ

#define HF_ADJ   2

HF_GEN

#define HF_GEN   8

huffTabSBR

#define huffTabSBR   STATNAME(huffTabSBR)

huffTabSBRInfo

#define huffTabSBRInfo   STATNAME(huffTabSBRInfo)

InvRNormalized

#define InvRNormalized   STATNAME(InvRNormalized)

k0Tab

#define k0Tab   STATNAME(k0Tab)

k2Tab

#define k2Tab   STATNAME(k2Tab)

log2Tab

#define log2Tab   STATNAME(log2Tab)

MAX

#define MAX	(		a,
			b
	)		((a) > (b) ? (a) : (b))

MAX_HUFF_BITS

#define MAX_HUFF_BITS   20

MAX_NUM_ENV

#define MAX_NUM_ENV   5

MAX_NUM_NOISE_FLOOR_BANDS

#define MAX_NUM_NOISE_FLOOR_BANDS   5 /* max Nq, see 4.6.18.3.6 */

MAX_NUM_NOISE_FLOORS

#define MAX_NUM_NOISE_FLOORS   2

MAX_NUM_PATCHES

#define MAX_NUM_PATCHES   5

MAX_NUM_SMOOTH_COEFS

#define MAX_NUM_SMOOTH_COEFS   5

MAX_QMF_BANDS

#define MAX_QMF_BANDS   48 /* max QMF subbands covered by SBR (4.6.18.3.6) */

MIN

#define MIN	(		a,
			b
	)		((a) < (b) ? (a) : (b))

MIN_GBITS_IN_QMFS

#define MIN_GBITS_IN_QMFS   2

NOISE_FLOOR_OFFSET

#define NOISE_FLOOR_OFFSET   6

noiseTab

#define noiseTab   STATNAME(noiseTab)

NUM_QMF_DELAY_BUFS

#define NUM_QMF_DELAY_BUFS   10

NUM_SAMPLE_RATES_SBR

#define NUM_SAMPLE_RATES_SBR   9 /* downsampled (single-rate) mode unsupported, so only use Fs_sbr >= 16 kHz */

NUM_TIME_SLOTS

#define NUM_TIME_SLOTS   16

QMFAnalysis

#define QMFAnalysis   STATNAME(QMFAnalysis)

QMFAnalysisConv

#define QMFAnalysisConv   STATNAME(QMFAnalysisConv)

QMFSynthesis

#define QMFSynthesis   STATNAME(QMFSynthesis)

QMFSynthesisConv

#define QMFSynthesisConv   STATNAME(QMFSynthesisConv)

RatioPowInv

#define RatioPowInv   STATNAME(RatioPowInv)

SAMPLES_PER_SLOT

#define SAMPLES_PER_SLOT   2 /* RATE in spec */

SqrtFix

#define SqrtFix   STATNAME(SqrtFix)

UncoupleSBREnvelope

#define UncoupleSBREnvelope   STATNAME(UncoupleSBREnvelope)

UncoupleSBRNoise

#define UncoupleSBRNoise   STATNAME(UncoupleSBRNoise)

UnpackSBRChannelPair

#define UnpackSBRChannelPair   STATNAME(UnpackSBRChannelPair)

UnpackSBRHeader

#define UnpackSBRHeader   STATNAME(UnpackSBRHeader)

UnpackSBRSingleChannel

#define UnpackSBRSingleChannel   STATNAME(UnpackSBRSingleChannel)

类型定义说明

HuffInfo

typedef struct _HuffInfo HuffInfo

PSInfoSBR

typedef struct _PSInfoSBR PSInfoSBR

SBRChan

typedef struct _SBRChan SBRChan

SBRFreq

typedef struct _SBRFreq SBRFreq

SBRGrid

typedef struct _SBRGrid SBRGrid

SBRHeader

typedef struct _SBRHeader SBRHeader

枚举类型说明

anonymous enum

anonymous enum

枚举值
HuffTabSBR_tEnv15
HuffTabSBR_fEnv15
HuffTabSBR_tEnv15b
HuffTabSBR_fEnv15b
HuffTabSBR_tEnv30
HuffTabSBR_fEnv30
HuffTabSBR_tEnv30b
HuffTabSBR_fEnv30b
HuffTabSBR_tNoise30
HuffTabSBR_fNoise30
HuffTabSBR_tNoise30b
HuffTabSBR_fNoise30b

anonymous enum

anonymous enum

枚举值
SBR_GRID_FIXFIX
SBR_GRID_FIXVAR
SBR_GRID_VARFIX
SBR_GRID_VARVAR

函数说明

AdjustHighFreq()

void STATNAME() AdjustHighFreq	(	PSInfoSBR *	psi,
		SBRHeader *	sbrHdr,
		SBRGrid *	sbrGrid,
		SBRFreq *	sbrFreq,
		SBRChan *	sbrChan,
		int	ch
	)

CalcFreqTables()

int STATNAME() CalcFreqTables	(	SBRHeader *	sbrHdr,
		SBRFreq *	sbrFreq,
		int	sampRateIdx
	)

DecodeSBREnvelope()

void STATNAME() DecodeSBREnvelope	(	BitStreamInfo *	bsi,
		PSInfoSBR *	psi,
		SBRGrid *	sbrGrid,
		SBRFreq *	sbrFreq,
		SBRChan *	sbrChan,
		int	ch
	)

DecodeSBRNoise()

void STATNAME() DecodeSBRNoise	(	BitStreamInfo *	bsi,
		PSInfoSBR *	psi,
		SBRGrid *	sbrGrid,
		SBRFreq *	sbrFreq,
		SBRChan *	sbrChan,
		int	ch
	)

FFT32C()

void STATNAME() FFT32C

(

int *

x

)

GenerateHighFreq()

void STATNAME() GenerateHighFreq	(	PSInfoSBR *	psi,
		SBRGrid *	sbrGrid,
		SBRFreq *	sbrFreq,
		SBRChan *	sbrChan,
		int	ch
	)

GetSampRateIdx()

int STATNAME() GetSampRateIdx

(

int

sampRate

)

InvRNormalized()

int STATNAME() InvRNormalized

(

int

r

)

QMFAnalysis()

int STATNAME() QMFAnalysis	(	int *	inbuf,
		int *	delay,
		int *	XBuf,
		int	fBitsIn,
		int *	delayIdx,
		int	qmfaBands
	)

QMFSynthesis()

void STATNAME() QMFSynthesis	(	int *	inbuf,
		int *	delay,
		int *	delayIdx,
		int	qmfsBands,
		short *	outbuf,
		int	nChans
	)

RatioPowInv()

int STATNAME() RatioPowInv	(	int	a,
		int	b,
		int	c
	)

SqrtFix()

int STATNAME() SqrtFix	(	int	x,
		int	fBitsIn,
		int *	fBitsOut
	)

STATNAME() [1/9]

const unsigned char STATNAME

(

k0Tab

)

STATNAME() [2/9]

const unsigned char STATNAME

(

k2Tab

)

STATNAME() [3/9]

const unsigned char STATNAME

(

goalSBTab

)

STATNAME() [4/9]

const HuffInfo STATNAME

(

huffTabSBRInfo

)

STATNAME() [5/9]

const signed short STATNAME

(

huffTabSBR

)

STATNAME() [6/9]

const int STATNAME

(

log2Tab

)

STATNAME() [7/9]

const int STATNAME

(

noiseTab

)

STATNAME() [8/9]

const int STATNAME

(

cTabA

)

STATNAME() [9/9]

const int STATNAME

(

cTabS

)

UncoupleSBREnvelope()

void STATNAME() UncoupleSBREnvelope	(	PSInfoSBR *	psi,
		SBRGrid *	sbrGrid,
		SBRFreq *	sbrFreq,
		SBRChan *	sbrChanR
	)

UncoupleSBRNoise()

void STATNAME() UncoupleSBRNoise	(	PSInfoSBR *	psi,
		SBRGrid *	sbrGrid,
		SBRFreq *	sbrFreq,
		SBRChan *	sbrChanR
	)

UnpackSBRChannelPair()

void STATNAME() UnpackSBRChannelPair	(	BitStreamInfo *	bsi,
		PSInfoSBR *	psi,
		int	chOut
	)

UnpackSBRHeader()

int STATNAME() UnpackSBRHeader	(	BitStreamInfo *	bsi,
		SBRHeader *	sbrHdr
	)

UnpackSBRSingleChannel()

void STATNAME() UnpackSBRSingleChannel	(	BitStreamInfo *	bsi,
		PSInfoSBR *	psi,
		int	chOut
	)