mp3coder.h 文件参考

#include "mp3common.h"

浏览源代码.

结构体
struct	_BitStreamInfo
struct	_FrameHeader
struct	_SideInfoSub
struct	_SideInfo
struct	CriticalBandInfo
struct	_DequantInfo
struct	_HuffmanInfo
struct	_HuffTabLookup
struct	_IMDCTInfo
struct	_BlockCount
struct	_ScaleFactorInfoSub
struct	_ScaleFactorJS
struct	_ScaleFactorInfo
struct	_SubbandInfo

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	CLIP_2N(y, n)
#define	SIBYTES_MPEG1_MONO   17
#define	SIBYTES_MPEG1_STEREO   32
#define	SIBYTES_MPEG2_MONO   9
#define	SIBYTES_MPEG2_STEREO   17
#define	POW43_FRACBITS_LOW   22
#define	POW43_FRACBITS_HIGH   12
#define	DQ_FRACBITS_OUT   25 /* number of fraction bits in output of dequant */
#define	IMDCT_SCALE   2 /* additional scaling (by sqrt(2)) for fast IMDCT36 */
#define	HUFF_PAIRTABS   32
#define	BLOCK_SIZE   18
#define	NBANDS   32
#define	MAX_REORDER_SAMPS   ((192-126)*3) /* largest critical band for short blocks (see sfBandTable) */
#define	VBUF_LENGTH   (17 * 2 * NBANDS) /* for double-sized vbuf FIFO */
#define	SetBitstreamPointer   STATNAME(SetBitstreamPointer)
#define	GetBits   STATNAME(GetBits)
#define	CalcBitsUsed   STATNAME(CalcBitsUsed)
#define	DequantChannel   STATNAME(DequantChannel)
#define	MidSideProc   STATNAME(MidSideProc)
#define	IntensityProcMPEG1   STATNAME(IntensityProcMPEG1)
#define	IntensityProcMPEG2   STATNAME(IntensityProcMPEG2)
#define	FDCT32   STATNAME(FDCT32)
#define	ISFMpeg1   STATNAME(ISFMpeg1)
#define	ISFMpeg2   STATNAME(ISFMpeg2)
#define	ISFIIP   STATNAME(ISFIIP)
#define	uniqueIDTab   STATNAME(uniqueIDTab)
#define	coef32   STATNAME(coef32)
#define	polyCoef   STATNAME(polyCoef)
#define	csa   STATNAME(csa)
#define	imdctWin   STATNAME(imdctWin)
#define	huffTable_0   STATNAME(huffTable_0)
#define	huffTable_1   STATNAME(huffTable_1)
#define	huffTable_2   STATNAME(huffTable_2)
#define	huffTabOffset   STATNAME(huffTabOffset)
#define	huffTabLookup   STATNAME(huffTabLookup)
#define	quadTable   STATNAME(quadTable)
#define	quadTabOffset   STATNAME(quadTabOffset)
#define	quadTabMaxBits   STATNAME(quadTabMaxBits)

类型定义
typedef struct _BitStreamInfo	BitStreamInfo
typedef struct _FrameHeader	FrameHeader
typedef struct _SideInfoSub	SideInfoSub
typedef struct _SideInfo	SideInfo
typedef struct _DequantInfo	DequantInfo
typedef struct _HuffmanInfo	HuffmanInfo
typedef enum _HuffTabType	HuffTabType
typedef struct _HuffTabLookup	HuffTabLookup
typedef struct _IMDCTInfo	IMDCTInfo
typedef struct _BlockCount	BlockCount
typedef struct _ScaleFactorInfoSub	ScaleFactorInfoSub
typedef struct _ScaleFactorJS	ScaleFactorJS
typedef struct _ScaleFactorInfo	ScaleFactorInfo
typedef struct _SubbandInfo	SubbandInfo

枚举
enum	StereoMode {   Stereo = 0x00,   Joint = 0x01,   Dual = 0x02,   Mono = 0x03 }
enum	_HuffTabType {   noBits,   oneShot,   loopNoLinbits,   loopLinbits,   quadA,   quadB,   invalidTab }

函数
void STATNAME()	SetBitstreamPointer (BitStreamInfo *bsi, int nBytes, unsigned char *buf)
unsigned int STATNAME()	GetBits (BitStreamInfo *bsi, int nBits)
int STATNAME()	CalcBitsUsed (BitStreamInfo *bsi, unsigned char *startBuf, int startOffset)
int STATNAME()	DequantChannel (int *sampleBuf, int *workBuf, int *nonZeroBound, FrameHeader *fh, SideInfoSub *sis, ScaleFactorInfoSub *sfis, CriticalBandInfo *cbi)
void STATNAME()	MidSideProc (int x[MAX_NCHAN][MAX_NSAMP], int nSamps, int mOut[2])
void STATNAME()	IntensityProcMPEG1 (int x[MAX_NCHAN][MAX_NSAMP], int nSamps, FrameHeader *fh, ScaleFactorInfoSub *sfis, CriticalBandInfo *cbi, int midSideFlag, int mixFlag, int mOut[2])
void STATNAME()	IntensityProcMPEG2 (int x[MAX_NCHAN][MAX_NSAMP], int nSamps, FrameHeader *fh, ScaleFactorInfoSub *sfis, CriticalBandInfo *cbi, ScaleFactorJS *sfjs, int midSideFlag, int mixFlag, int mOut[2])
void STATNAME()	FDCT32 (int *x, int *d, int offset, int oddBlock, int gb)
const HuffTabLookup	STATNAME (huffTabLookup) [32]
const int	STATNAME (huffTabOffset) [32]
const unsigned short	STATNAME (huffTable_0) []
const unsigned short	STATNAME (huffTable_1) []
const unsigned short	STATNAME (huffTable_2) []
const unsigned char	STATNAME (quadTable) [64+16]
const int	STATNAME (quadTabOffset) [2]
const int	STATNAME (quadTabMaxBits) [2]
void	PolyphaseMono (short *pcm, int *vbuf, const int *coefBase)
void	PolyphaseStereo (short *pcm, int *vbuf, const int *coefBase)
const int	STATNAME (imdctWin) [4][36]
const int	STATNAME (ISFMpeg1) [2][7]
const int	STATNAME (ISFMpeg2) [2][2][16]
const int	STATNAME (ISFIIP) [2][2]
const int	STATNAME (csa) [8][2]
const int	STATNAME (coef32) [31]
const int	STATNAME (polyCoef) [264]

---

结构体说明

_BitStreamInfo

struct _BitStreamInfo

成员变量
unsigned char *	bytePtr
int	cachedBits
unsigned int	iCache
int	nBytes

_FrameHeader

struct _FrameHeader

成员变量
int	brIdx
int	copyFlag
int	crc
int	CRCWord
int	emphasis
int	layer
int	modeExt
int	origFlag
int	paddingBit
int	privateBit
const SFBandTable *	sfBand
StereoMode	sMode
int	srIdx
MPEGVersion	ver

_SideInfoSub

struct _SideInfoSub

成员变量
int	blockType
int	count1TableSelect
int	globalGain
int	mixedBlock
int	nBigvals
int	part23Length
int	preFlag
int	region0Count
int	region1Count
int	sfactScale
int	sfCompress
int	subBlockGain[3]
int	tableSelect[3]
int	winSwitchFlag

_SideInfo

struct _SideInfo

成员变量
int	mainDataBegin
int	privateBits
int	scfsi[MAX_NCHAN][MAX_SCFBD]
SideInfoSub	sis[MAX_NGRAN][MAX_NCHAN]

CriticalBandInfo

struct CriticalBandInfo

成员变量
int	cbEndL
int	cbEndS[3]
int	cbEndSMax
int	cbType

_DequantInfo

struct _DequantInfo

成员变量
CriticalBandInfo	cbi[MAX_NCHAN]
int	workBuf[((192-126) *3)]

_HuffmanInfo

struct _HuffmanInfo

成员变量
int	gb[MAX_NCHAN]
int	huffDecBuf[MAX_NCHAN][MAX_NSAMP]
int	nonZeroBound[MAX_NCHAN]

_HuffTabLookup

struct _HuffTabLookup

成员变量
int	linBits
HuffTabType	tabType

_IMDCTInfo

struct _IMDCTInfo

成员变量
int	gb[MAX_NCHAN]
int	numPrevIMDCT[MAX_NCHAN]
int	outBuf[MAX_NCHAN][18][32]
int	overBuf[MAX_NCHAN][MAX_NSAMP/2]
int	prevType[MAX_NCHAN]
int	prevWinSwitch[MAX_NCHAN]

_BlockCount

struct _BlockCount

成员变量
int	currWinSwitch
int	gbIn
int	gbOut
int	nBlocksLong
int	nBlocksPrev
int	nBlocksTotal
int	prevType
int	prevWinSwitch

_ScaleFactorInfoSub

struct _ScaleFactorInfoSub

成员变量
char	l[23]
char	s[13][3]

_ScaleFactorJS

struct _ScaleFactorJS

成员变量
int	intensityScale
int	nr[4]
int	slen[4]

_ScaleFactorInfo

struct _ScaleFactorInfo

成员变量
ScaleFactorInfoSub	sfis[MAX_NGRAN][MAX_NCHAN]
ScaleFactorJS	sfjs

_SubbandInfo

struct _SubbandInfo

成员变量
int	vbuf[MAX_NCHAN *(17 *2 *32)]
int	vindex

宏定义说明

ASSERT

#define ASSERT

(

x

)

/* do nothing */

BLOCK_SIZE

#define BLOCK_SIZE   18

CalcBitsUsed

#define CalcBitsUsed   STATNAME(CalcBitsUsed)

CLIP_2N

#define CLIP_2N	(		y,
			n
	)

值:

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

coef32

#define coef32   STATNAME(coef32)

csa

#define csa   STATNAME(csa)

DequantChannel

#define DequantChannel   STATNAME(DequantChannel)

DQ_FRACBITS_OUT

#define DQ_FRACBITS_OUT   25 /* number of fraction bits in output of dequant */

FDCT32

#define FDCT32   STATNAME(FDCT32)

GetBits

#define GetBits   STATNAME(GetBits)

HUFF_PAIRTABS

#define HUFF_PAIRTABS   32

huffTable_0

#define huffTable_0   STATNAME(huffTable_0)

huffTable_1

#define huffTable_1   STATNAME(huffTable_1)

huffTable_2

#define huffTable_2   STATNAME(huffTable_2)

huffTabLookup

#define huffTabLookup   STATNAME(huffTabLookup)

huffTabOffset

#define huffTabOffset   STATNAME(huffTabOffset)

IMDCT_SCALE

#define IMDCT_SCALE   2 /* additional scaling (by sqrt(2)) for fast IMDCT36 */

imdctWin

#define imdctWin   STATNAME(imdctWin)

IntensityProcMPEG1

#define IntensityProcMPEG1   STATNAME(IntensityProcMPEG1)

IntensityProcMPEG2

#define IntensityProcMPEG2   STATNAME(IntensityProcMPEG2)

ISFIIP

#define ISFIIP   STATNAME(ISFIIP)

ISFMpeg1

#define ISFMpeg1   STATNAME(ISFMpeg1)

ISFMpeg2

#define ISFMpeg2   STATNAME(ISFMpeg2)

MAX

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

MAX_REORDER_SAMPS

#define MAX_REORDER_SAMPS   ((192-126)*3) /* largest critical band for short blocks (see sfBandTable) */

MidSideProc

#define MidSideProc   STATNAME(MidSideProc)

MIN

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

NBANDS

#define NBANDS   32

polyCoef

#define polyCoef   STATNAME(polyCoef)

POW43_FRACBITS_HIGH

#define POW43_FRACBITS_HIGH   12

POW43_FRACBITS_LOW

#define POW43_FRACBITS_LOW   22

quadTable

#define quadTable   STATNAME(quadTable)

quadTabMaxBits

#define quadTabMaxBits   STATNAME(quadTabMaxBits)

quadTabOffset

#define quadTabOffset   STATNAME(quadTabOffset)

SetBitstreamPointer

#define SetBitstreamPointer   STATNAME(SetBitstreamPointer)

SIBYTES_MPEG1_MONO

#define SIBYTES_MPEG1_MONO   17

SIBYTES_MPEG1_STEREO

#define SIBYTES_MPEG1_STEREO   32

SIBYTES_MPEG2_MONO

#define SIBYTES_MPEG2_MONO   9

SIBYTES_MPEG2_STEREO

#define SIBYTES_MPEG2_STEREO   17

uniqueIDTab

#define uniqueIDTab   STATNAME(uniqueIDTab)

VBUF_LENGTH

#define VBUF_LENGTH   (17 * 2 * NBANDS) /* for double-sized vbuf FIFO */

类型定义说明

BitStreamInfo

typedef struct _BitStreamInfo BitStreamInfo

BlockCount

typedef struct _BlockCount BlockCount

DequantInfo

typedef struct _DequantInfo DequantInfo

FrameHeader

typedef struct _FrameHeader FrameHeader

HuffmanInfo

typedef struct _HuffmanInfo HuffmanInfo

HuffTabLookup

typedef struct _HuffTabLookup HuffTabLookup

HuffTabType

typedef enum _HuffTabType HuffTabType

IMDCTInfo

typedef struct _IMDCTInfo IMDCTInfo

ScaleFactorInfo

typedef struct _ScaleFactorInfo ScaleFactorInfo

ScaleFactorInfoSub

typedef struct _ScaleFactorInfoSub ScaleFactorInfoSub

ScaleFactorJS

typedef struct _ScaleFactorJS ScaleFactorJS

SideInfo

typedef struct _SideInfo SideInfo

SideInfoSub

typedef struct _SideInfoSub SideInfoSub

SubbandInfo

typedef struct _SubbandInfo SubbandInfo

枚举类型说明

_HuffTabType

enum _HuffTabType

枚举值
noBits
oneShot
loopNoLinbits
loopLinbits
quadA
quadB
invalidTab

StereoMode

enum StereoMode

枚举值
Stereo
Joint
Dual
Mono

函数说明

CalcBitsUsed()

int STATNAME() CalcBitsUsed	(	BitStreamInfo *	bsi,
		unsigned char *	startBuf,
		int	startOffset
	)

DequantChannel()

int STATNAME() DequantChannel	(	int *	sampleBuf,
		int *	workBuf,
		int *	nonZeroBound,
		FrameHeader *	fh,
		SideInfoSub *	sis,
		ScaleFactorInfoSub *	sfis,
		CriticalBandInfo *	cbi
	)

FDCT32()

void STATNAME() FDCT32	(	int *	x,
		int *	d,
		int	offset,
		int	oddBlock,
		int	gb
	)

GetBits()

unsigned int STATNAME() GetBits	(	BitStreamInfo *	bsi,
		int	nBits
	)

IntensityProcMPEG1()

void STATNAME() IntensityProcMPEG1	(	int	x[MAX_NCHAN][MAX_NSAMP],
		int	nSamps,
		FrameHeader *	fh,
		ScaleFactorInfoSub *	sfis,
		CriticalBandInfo *	cbi,
		int	midSideFlag,
		int	mixFlag,
		int	mOut[2]
	)

IntensityProcMPEG2()

void STATNAME() IntensityProcMPEG2	(	int	x[MAX_NCHAN][MAX_NSAMP],
		int	nSamps,
		FrameHeader *	fh,
		ScaleFactorInfoSub *	sfis,
		CriticalBandInfo *	cbi,
		ScaleFactorJS *	sfjs,
		int	midSideFlag,
		int	mixFlag,
		int	mOut[2]
	)

MidSideProc()

void STATNAME() MidSideProc	(	int	x[MAX_NCHAN][MAX_NSAMP],
		int	nSamps,
		int	mOut[2]
	)

PolyphaseMono()

void PolyphaseMono	(	short *	pcm,
		int *	vbuf,
		const int *	coefBase
	)

PolyphaseStereo()

void PolyphaseStereo	(	short *	pcm,
		int *	vbuf,
		const int *	coefBase
	)

SetBitstreamPointer()

void STATNAME() SetBitstreamPointer	(	BitStreamInfo *	bsi,
		int	nBytes,
		unsigned char *	buf
	)

STATNAME() [1/15]

const HuffTabLookup STATNAME

(

huffTabLookup

)

STATNAME() [2/15]

const int STATNAME

(

huffTabOffset

)

STATNAME() [3/15]

const unsigned short STATNAME

(

huffTable_0

)

STATNAME() [4/15]

const unsigned short STATNAME

(

huffTable_1

)

STATNAME() [5/15]

const unsigned short STATNAME

(

huffTable_2

)

STATNAME() [6/15]

const unsigned char STATNAME

(

quadTable

)

STATNAME() [7/15]

const int STATNAME

(

quadTabOffset

)

STATNAME() [8/15]

const int STATNAME

(

quadTabMaxBits

)

STATNAME() [9/15]

const int STATNAME

(

imdctWin

)

STATNAME() [10/15]

const int STATNAME

(

ISFMpeg1

)

STATNAME() [11/15]

const int STATNAME

(

ISFMpeg2

)

STATNAME() [12/15]

const int STATNAME

(

ISFIIP

)

STATNAME() [13/15]

const int STATNAME

(

csa

)

STATNAME() [14/15]

const int STATNAME

(

coef32

)

STATNAME() [15/15]

const int STATNAME

(

polyCoef

)