vlc.h

264的播放器

/*!
 ************************************************************************
 * \file vlc.h
 *
 * \brief
 *    header for (CA)VLC coding functions
 *
 * \author
 *    Karsten Suehring
 *
 ************************************************************************
 */

#ifndef _VLC_H_
#define _VLC_H_

int se_v (char *tracestring, Bitstream *bitstream);
int ue_v (char *tracestring, Bitstream *bitstream);
Boolean u_1 (char *tracestring, Bitstream *bitstream);
int u_v (int LenInBits, char *tracestring, Bitstream *bitstream);

// UVLC mapping
void linfo_ue(int len, int info, int *value1, int *dummy);
void linfo_se(int len, int info, int *value1, int *dummy);

void linfo_cbp_intra(int len,int info,int *cbp, int *dummy);
void linfo_cbp_inter(int len,int info,int *cbp, int *dummy);

int  readSyntaxElement_VLC (SyntaxElement *sym, Bitstream *currStream);
int  readSyntaxElement_UVLC(SyntaxElement *sym, struct datapartition *dp);
int  readSyntaxElement_Intra4x4PredictionMode(SyntaxElement *sym, struct datapartition *dp);

int  GetVLCSymbol (byte buffer[],int totbitoffset,int *info, int bytecount);
int  GetVLCSymbol_IntraMode (byte buffer[],int totbitoffset,int *info, int bytecount);

int readSyntaxElement_FLC(SyntaxElement *sym, Bitstream *currStream);
int readSyntaxElement_NumCoeffTrailingOnes(SyntaxElement *sym,  DataPartition *dP,
                                           char *type);
int readSyntaxElement_NumCoeffTrailingOnesChromaDC(SyntaxElement *sym,  DataPartition *dP);
int readSyntaxElement_Level_VLC0(SyntaxElement *sym, struct datapartition *dP);
int readSyntaxElement_Level_VLCN(SyntaxElement *sym, int vlc, struct datapartition *dP);
int readSyntaxElement_TotalZeros(SyntaxElement *sym,  DataPartition *dP);
int readSyntaxElement_TotalZerosChromaDC(SyntaxElement *sym,  DataPartition *dP);
int readSyntaxElement_Run(SyntaxElement *sym,  DataPartition *dP);
int GetBits (byte buffer[],int totbitoffset,int *info, int bytecount, 
             int numbits);
int ShowBits (byte buffer[],int totbitoffset,int bytecount, int numbits);


static unsigned int msk[33] =
{
  0x00000000,0x00000001,0x00000003,0x00000007,
  0x0000000f,0x0000001f,0x0000003f,0x0000007f,
  0x000000ff,0x000001ff,0x000003ff,0x000007ff,
  0x00000fff,0x00001fff,0x00003fff,0x00007fff,
  0x0000ffff,0x0001ffff,0x0003ffff,0x0007ffff,
  0x000fffff,0x001fffff,0x003fffff,0x007fffff,
  0x00ffffff,0x01ffffff,0x03ffffff,0x07ffffff,
  0x0fffffff,0x1fffffff,0x3fffffff,0x7fffffff,
  0xffffffff
};

#endif