aachuffman.c 文件参考

#include "aaccoder.h"

宏定义
#define	APPLY_SIGN(v, s)   {(v) ^= ((signed int)(s) >> 31); (v) -= ((signed int)(s) >> 31);}
#define	GET_QUAD_SIGNBITS(v)   (((unsigned int)(v) << 17) >> 29) /* bits 14-12, unsigned */
#define	GET_QUAD_W(v)   (((signed int)(v) << 20) >> 29) /* bits 11-9, sign-extend */
#define	GET_QUAD_X(v)   (((signed int)(v) << 23) >> 29) /* bits 8-6, sign-extend */
#define	GET_QUAD_Y(v)   (((signed int)(v) << 26) >> 29) /* bits 5-3, sign-extend */
#define	GET_QUAD_Z(v)   (((signed int)(v) << 29) >> 29) /* bits 2-0, sign-extend */
#define	GET_PAIR_SIGNBITS(v)   (((unsigned int)(v) << 20) >> 30) /* bits 11-10, unsigned */
#define	GET_PAIR_Y(v)   (((signed int)(v) << 22) >> 27) /* bits 9-5, sign-extend */
#define	GET_PAIR_Z(v)   (((signed int)(v) << 27) >> 27) /* bits 4-0, sign-extend */
#define	GET_ESC_SIGNBITS(v)   (((unsigned int)(v) << 18) >> 30) /* bits 13-12, unsigned */
#define	GET_ESC_Y(v)   (((signed int)(v) << 20) >> 26) /* bits 11-6, sign-extend */
#define	GET_ESC_Z(v)   (((signed int)(v) << 26) >> 26) /* bits 5-0, sign-extend */

函数
int STATNAME()	DecodeHuffmanScalar (const signed short *huffTab, const HuffInfo *huffTabInfo, unsigned int bitBuf, signed int *val)
static void	UnpackZeros (int nVals, int *coef)
static void	UnpackQuads (BitStreamInfo *bsi, int cb, int nVals, int *coef)
static void	UnpackPairsNoEsc (BitStreamInfo *bsi, int cb, int nVals, int *coef)
static void	UnpackPairsEsc (BitStreamInfo *bsi, int cb, int nVals, int *coef)
void STATNAME()	DecodeSpectrumLong (PSInfoBase *psi, BitStreamInfo *bsi, int ch)
void STATNAME()	DecodeSpectrumShort (PSInfoBase *psi, BitStreamInfo *bsi, int ch)

宏定义说明

APPLY_SIGN

#define APPLY_SIGN	(		v,
			s
	)		{(v) ^= ((signed int)(s) >> 31); (v) -= ((signed int)(s) >> 31);}

GET_ESC_SIGNBITS

#define GET_ESC_SIGNBITS

(

v

)

(((unsigned int)(v) << 18) >> 30) /* bits 13-12, unsigned */

GET_ESC_Y

#define GET_ESC_Y

(

v

)

(((signed int)(v) << 20) >> 26) /* bits 11-6, sign-extend */

GET_ESC_Z

#define GET_ESC_Z

(

v

)

(((signed int)(v) << 26) >> 26) /* bits 5-0, sign-extend */

GET_PAIR_SIGNBITS

#define GET_PAIR_SIGNBITS

(

v

)

(((unsigned int)(v) << 20) >> 30) /* bits 11-10, unsigned */

GET_PAIR_Y

#define GET_PAIR_Y

(

v

)

(((signed int)(v) << 22) >> 27) /* bits 9-5, sign-extend */

GET_PAIR_Z

#define GET_PAIR_Z

(

v

)

(((signed int)(v) << 27) >> 27) /* bits 4-0, sign-extend */

GET_QUAD_SIGNBITS

#define GET_QUAD_SIGNBITS

(

v

)

(((unsigned int)(v) << 17) >> 29) /* bits 14-12, unsigned */

GET_QUAD_W

#define GET_QUAD_W

(

v

)

(((signed int)(v) << 20) >> 29) /* bits 11-9, sign-extend */

GET_QUAD_X

#define GET_QUAD_X

(

v

)

(((signed int)(v) << 23) >> 29) /* bits 8-6, sign-extend */

GET_QUAD_Y

#define GET_QUAD_Y

(

v

)

(((signed int)(v) << 26) >> 29) /* bits 5-3, sign-extend */

GET_QUAD_Z

#define GET_QUAD_Z

(

v

)

(((signed int)(v) << 29) >> 29) /* bits 2-0, sign-extend */

函数说明

DecodeHuffmanScalar()

int STATNAME() DecodeHuffmanScalar	(	const signed short *	huffTab,
		const HuffInfo *	huffTabInfo,
		unsigned int	bitBuf,
		signed int *	val
	)

DecodeSpectrumLong()

void STATNAME() DecodeSpectrumLong	(	PSInfoBase *	psi,
		BitStreamInfo *	bsi,
		int	ch
	)

DecodeSpectrumShort()

void STATNAME() DecodeSpectrumShort	(	PSInfoBase *	psi,
		BitStreamInfo *	bsi,
		int	ch
	)

UnpackPairsEsc()

static void UnpackPairsEsc ( BitStreamInfo *  bsi, int  cb, int  nVals, int *  coef  )

static

UnpackPairsNoEsc()

static void UnpackPairsNoEsc ( BitStreamInfo *  bsi, int  cb, int  nVals, int *  coef  )

static

UnpackQuads()

static void UnpackQuads ( BitStreamInfo *  bsi, int  cb, int  nVals, int *  coef  )

static

UnpackZeros()

static void UnpackZeros ( int  nVals, int *  coef  )

static