vlc.h

包含了从MPEG4的视频解码到H.264的视频编码部分的源代码

/*
***********************************************************************
* COPYRIGHT AND WARRANTY INFORMATION
*
* Copyright 2001, International Telecommunications Union, Geneva
*
* DISCLAIMER OF WARRANTY
*
* These software programs are available to the user without any
* license fee or royalty on an "as is" basis. The ITU disclaims
* any and all warranties, whether express, implied, or
* statutory, including any implied warranties of merchantability
* or of fitness for a particular purpose.  In no event shall the
* contributor or the ITU be liable for any incidental, punitive, or
* consequential damages of any kind whatsoever arising from the
* use of these programs.
*
* This disclaimer of warranty extends to the user of these programs
* and user's customers, employees, agents, transferees, successors,
* and assigns.
*
* The ITU does not represent or warrant that the programs furnished
* hereunder are free of infringement of any third-party patents.
* Commercial implementations of ITU-T Recommendations, including
* shareware, may be subject to royalty fees to patent holders.
* Information regarding the ITU-T patent policy is available from
* the ITU Web site at http://www.itu.int.
*
* THIS IS NOT A GRANT OF PATENT RIGHTS - SEE THE ITU-T PATENT POLICY.
************************************************************************
*/

/*!
 ************************************************************************
 * \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);
int 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);
void linfo_levrun_inter(int len,int info,int *level,int *irun);
void linfo_levrun_c2x2(int len,int info,int *level,int *irun);

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


#endif