mp3common.h 文件参考

#include "mp3dec.h"
#include "mp3statname.h"
#include "sdk_default_config.h"

浏览源代码.

结构体
struct	_MP3DecInfo
struct	_SFBandTable

宏定义
#define	MAX_SCFBD   4 /* max scalefactor bands per channel */
#define	NGRANS_MPEG1   2
#define	NGRANS_MPEG2   1
#define	SYNCWORDH   0xff
#define	SYNCWORDL   0xe0

类型定义
typedef struct _MP3DecInfo	MP3DecInfo
typedef struct _SFBandTable	SFBandTable

函数
MP3DecInfo *	xmp3_AllocateBuffers (void)
void	xmp3_FreeBuffers (MP3DecInfo *mp3DecInfo)
void	xmp3_ClearBuffers (MP3DecInfo *mp3DecInfo)
int	xmp3_CheckPadBit (MP3DecInfo *mp3DecInfo)
int	xmp3_UnpackFrameHeader (MP3DecInfo *mp3DecInfo, unsigned char *buf)
int	xmp3_UnpackSideInfo (MP3DecInfo *mp3DecInfo, unsigned char *buf)
int	xmp3_DecodeHuffman (MP3DecInfo *mp3DecInfo, unsigned char *buf, int *bitOffset, int huffBlockBits, int gr, int ch)
int	xmp3_Dequantize (MP3DecInfo *mp3DecInfo, int gr)
int	xmp3_IMDCT (MP3DecInfo *mp3DecInfo, int gr, int ch)
int	xmp3_UnpackScaleFactors (MP3DecInfo *mp3DecInfo, unsigned char *buf, int *bitOffset, int bitsAvail, int gr, int ch)
int	xmp3_Subband (MP3DecInfo *mp3DecInfo, short *pcmBuf)

变量
const int	xmp3_samplerateTab [3][3]
const short	xmp3_bitrateTab [3][3][15]
const short	xmp3_samplesPerFrameTab [3][3]
const short	xmp3_bitsPerSlotTab [3]
const short	xmp3_sideBytesTab [3][2]
const short	xmp3_slotTab [3][3][15]
const SFBandTable	xmp3_sfBandTable [3][3]

---

结构体说明

_MP3DecInfo

struct _MP3DecInfo

成员变量
int	bitrate
void *	DequantInfoPS
void *	FrameHeaderPS
int	freeBitrateFlag
int	freeBitrateSlots
void *	HuffmanInfoPS
void *	IMDCTInfoPS
int	layer
unsigned char	mainBuf[MAINBUF_SIZE]
int	mainDataBegin
int	mainDataBytes
int	nChans
int	nGrans
int	nGranSamps
int	nSlots
int	part23Length[MAX_NGRAN][MAX_NCHAN]
int	samprate
void *	ScaleFactorInfoPS
void *	SideInfoPS
void *	SubbandInfoPS
MPEGVersion	version

_SFBandTable

struct _SFBandTable

成员变量
short	l[23]
short	s[14]

宏定义说明

MAX_SCFBD

#define MAX_SCFBD   4 /* max scalefactor bands per channel */

NGRANS_MPEG1

#define NGRANS_MPEG1   2

NGRANS_MPEG2

#define NGRANS_MPEG2   1

SYNCWORDH

#define SYNCWORDH   0xff

SYNCWORDL

#define SYNCWORDL   0xe0

类型定义说明

MP3DecInfo

typedef struct _MP3DecInfo MP3DecInfo

SFBandTable

typedef struct _SFBandTable SFBandTable

函数说明

xmp3_AllocateBuffers()

MP3DecInfo* xmp3_AllocateBuffers

(

void

)

xmp3_CheckPadBit()

int xmp3_CheckPadBit

(

MP3DecInfo *

mp3DecInfo

)

xmp3_ClearBuffers()

void xmp3_ClearBuffers

(

MP3DecInfo *

mp3DecInfo

)

xmp3_DecodeHuffman()

int xmp3_DecodeHuffman	(	MP3DecInfo *	mp3DecInfo,
		unsigned char *	buf,
		int *	bitOffset,
		int	huffBlockBits,
		int	gr,
		int	ch
	)

xmp3_Dequantize()

int xmp3_Dequantize	(	MP3DecInfo *	mp3DecInfo,
		int	gr
	)

xmp3_FreeBuffers()

void xmp3_FreeBuffers

(

MP3DecInfo *

mp3DecInfo

)

xmp3_IMDCT()

int xmp3_IMDCT	(	MP3DecInfo *	mp3DecInfo,
		int	gr,
		int	ch
	)

xmp3_Subband()

int xmp3_Subband	(	MP3DecInfo *	mp3DecInfo,
		short *	pcmBuf
	)

xmp3_UnpackFrameHeader()

int xmp3_UnpackFrameHeader	(	MP3DecInfo *	mp3DecInfo,
		unsigned char *	buf
	)

xmp3_UnpackScaleFactors()

int xmp3_UnpackScaleFactors	(	MP3DecInfo *	mp3DecInfo,
		unsigned char *	buf,
		int *	bitOffset,
		int	bitsAvail,
		int	gr,
		int	ch
	)

xmp3_UnpackSideInfo()

int xmp3_UnpackSideInfo	(	MP3DecInfo *	mp3DecInfo,
		unsigned char *	buf
	)

变量说明

xmp3_bitrateTab

const short xmp3_bitrateTab[3][3][15]

xmp3_bitsPerSlotTab

const short xmp3_bitsPerSlotTab[3]

xmp3_samplerateTab

const int xmp3_samplerateTab[3][3]

xmp3_samplesPerFrameTab

const short xmp3_samplesPerFrameTab[3][3]

xmp3_sfBandTable

const SFBandTable xmp3_sfBandTable[3][3]

xmp3_sideBytesTab

const short xmp3_sideBytesTab[3][2]

xmp3_slotTab

const short xmp3_slotTab[3][3][15]