mp3huffman.c 文件参考

#include "mp3coder.h"

宏定义
#define	GetMaxbits(x)   ((int)( (((unsigned short)(x)) >> 0) & 0x000f))
#define	GetHLen(x)   ((int)( (((unsigned short)(x)) >> 12) & 0x000f))
#define	GetCWY(x)   ((int)( (((unsigned short)(x)) >> 8) & 0x000f))
#define	GetCWX(x)   ((int)( (((unsigned short)(x)) >> 4) & 0x000f))
#define	GetSignBits(x)   ((int)( (((unsigned short)(x)) >> 0) & 0x000f))
#define	GetHLenQ(x)   ((int)( (((unsigned char)(x)) >> 4) & 0x0f))
#define	GetCWVQ(x)   ((int)( (((unsigned char)(x)) >> 3) & 0x01))
#define	GetCWWQ(x)   ((int)( (((unsigned char)(x)) >> 2) & 0x01))
#define	GetCWXQ(x)   ((int)( (((unsigned char)(x)) >> 1) & 0x01))
#define	GetCWYQ(x)   ((int)( (((unsigned char)(x)) >> 0) & 0x01))
#define	ApplySign(x, s)   { (x) |= ((s) & 0x80000000); }

函数
static _XIF_ int	DecodeHuffmanPairs (int *xy, int nVals, int tabIdx, int bitsLeft, unsigned char *buf, int bitOffset)
static _XIF_ int	DecodeHuffmanQuads (int *vwxy, int nVals, int tabIdx, int bitsLeft, unsigned char *buf, int bitOffset)
_XIF_ int	DecodeHuffman (MP3DecInfo *mp3DecInfo, unsigned char *buf, int *bitOffset, int huffBlockBits, int gr, int ch)

宏定义说明

ApplySign

#define ApplySign	(		x,
			s
	)		{ (x) |= ((s) & 0x80000000); }

GetCWVQ

#define GetCWVQ

(

x

)

((int)( (((unsigned char)(x)) >> 3) & 0x01))

GetCWWQ

#define GetCWWQ

(

x

)

((int)( (((unsigned char)(x)) >> 2) & 0x01))

GetCWX

#define GetCWX

(

x

)

((int)( (((unsigned short)(x)) >> 4) & 0x000f))

GetCWXQ

#define GetCWXQ

(

x

)

((int)( (((unsigned char)(x)) >> 1) & 0x01))

GetCWY

#define GetCWY

(

x

)

((int)( (((unsigned short)(x)) >> 8) & 0x000f))

GetCWYQ

#define GetCWYQ

(

x

)

((int)( (((unsigned char)(x)) >> 0) & 0x01))

GetHLen

#define GetHLen

(

x

)

((int)( (((unsigned short)(x)) >> 12) & 0x000f))

GetHLenQ

#define GetHLenQ

(

x

)

((int)( (((unsigned char)(x)) >> 4) & 0x0f))

GetMaxbits

#define GetMaxbits

(

x

)

((int)( (((unsigned short)(x)) >> 0) & 0x000f))

GetSignBits

#define GetSignBits

(

x

)

((int)( (((unsigned short)(x)) >> 0) & 0x000f))

函数说明

DecodeHuffman()

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

DecodeHuffmanPairs()

static _XIF_ int DecodeHuffmanPairs ( int *  xy, int  nVals, int  tabIdx, int  bitsLeft, unsigned char *  buf, int  bitOffset  )

static

DecodeHuffmanQuads()

static _XIF_ int DecodeHuffmanQuads ( int *  vwxy, int  nVals, int  tabIdx, int  bitsLeft, unsigned char *  buf, int  bitOffset  )

static