h264bsd_cavlc.c File Reference

#include "h264bsd_cavlc.h"
#include "h264bsd_util.h"

Include dependency graph for h264bsd_cavlc.c:

Macros
#define	LENGTH_TC(vlc)   ((vlc) & 0x1F)
#define	LENGTH(vlc)   ((vlc) & 0xF)
#define	INFO(vlc)   (((vlc) >> 4) & 0xF) /* 4 MSB bits contain information */
#define	TRAILING_ONES(coeffToken)   ((coeffToken>>5) & 0x3F)
#define	TOTAL_COEFF(coeffToken)   (((coeffToken) >> 11) & 0x1F)
#define	VLC_NOT_FOUND   0xFFFFFFFEU
#define	BUFFER_INIT(value, bits)
#define	BUFFER_SHOW(value, bits, outVal, numBits)
#define	BUFFER_FLUSH(value, bits, numBits)
#define	BUFFER_GET(value, bits, outVal, numBits)

Functions
u32	h264bsdDecodeResidualBlockCavlc (strmData_t *pStrmData, i32 *coeffLevel, i32 nc, u32 maxNumCoeff)

Macro Definition Documentation

BUFFER_FLUSH

#define BUFFER_FLUSH	(		value,
			bits,
			numBits
	)

Value:

{ \
    value <<= (numBits); \
    bits -= (numBits); \
}

BUFFER_GET

#define BUFFER_GET	(		value,
			bits,
			outVal,
			numBits
	)

Value:

{ \
    if (bits < (numBits)) \
    { \
        if(h264bsdFlushBits(pStrmData,32-bits) == END_OF_STREAM) \
            return(HANTRO_NOK); \
        value = h264bsdShowBits32(pStrmData); \
        bits = 32; \
    } \
    (outVal) = value >> (32 - (numBits)); \
    value <<= (numBits); \
    bits -= (numBits); \
}

BUFFER_INIT

#define BUFFER_INIT	(		value,
			bits
	)

Value:

{ \
    bits = 32; \
    value = h264bsdShowBits32(pStrmData); \
}

BUFFER_SHOW

#define BUFFER_SHOW	(		value,
			bits,
			outVal,
			numBits
	)

Value:

{ \
    if (bits < (numBits)) \
    { \
        if(h264bsdFlushBits(pStrmData,32-bits) == END_OF_STREAM) \
            return(HANTRO_NOK); \
        value = h264bsdShowBits32(pStrmData); \
        bits = 32; \
    } \
    (outVal) = value >> (32 - (numBits)); \
}

INFO

#define INFO

(

vlc

)

(((vlc) >> 4) & 0xF) /* 4 MSB bits contain information */

LENGTH

#define LENGTH

(

vlc

)

((vlc) & 0xF)

LENGTH_TC

#define LENGTH_TC

(

vlc

)

((vlc) & 0x1F)

TOTAL_COEFF

#define TOTAL_COEFF

(

coeffToken

)

(((coeffToken) >> 11) & 0x1F)

TRAILING_ONES

#define TRAILING_ONES

(

coeffToken

)

((coeffToken>>5) & 0x3F)

VLC_NOT_FOUND

#define VLC_NOT_FOUND   0xFFFFFFFEU

Function Documentation

h264bsdDecodeResidualBlockCavlc()

u32 h264bsdDecodeResidualBlockCavlc	(	strmData_t *	pStrmData,
		i32 *	coeffLevel,
		i32	nc,
		u32	maxNumCoeff
	)