ref: 62c41d613aff0c79243c7aa8ce9236884ef443ab
dir: /bitstream.h/
/*
* Function prototypes for bitstream writing
*
* Copyright (c) 1999 M. Bakker
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/**************************************************************************
Version Control Information Method: CVS
Identifiers:
$Revision: 1.3 $
$Date: 2000/10/05 08:39:02 $ (check in)
$Author: menno $
*************************************************************************/
#ifndef _bitstream_h_
#define _bitstream_h_
#ifndef min
#define min(a,b) ( (a) < (b) ? (a) : (b) )
#endif
#ifndef max
#define max(a,b) ( (a) > (b) ? (a) : (b) )
#endif
#define BYTE_NUMBIT 8 /* bits in byte (char) */
#define LONG_NUMBIT 32 /* bits in unsigned long */
#define bit2byte(a) (((a)+BYTE_NUMBIT-1)/BYTE_NUMBIT)
#define byte2bit(a) ((a)*BYTE_NUMBIT)
typedef struct _bitstream
{
unsigned char *data; /* data bits */
long numBit; /* number of bits in buffer */
long size; /* buffer size in bits */
long currentBit; /* current bit position in bit stream */
long numByte; /* number of bytes read/written (only file) */
} BsBitStream;
BsBitStream *BsOpenWrite(int size);
void BsClose(BsBitStream *bs);
long BsBufferNumBit (BsBitStream *bs);
int BsWriteByte (BsBitStream *stream,
unsigned long data,
int numBit);
int BsPutBit (BsBitStream *stream,
unsigned long data,
int numBit);
/* ByteAlign(...), used to byte align bitstream */
int ByteAlign(BsBitStream* ptrBs, int writeFlag);
#endif