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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// Intel License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000, Intel Corporation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of Intel Corporation may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#ifndef _BITSTRM_H_
#define _BITSTRM_H_
#include <stdio.h>
#include <setjmp.h>
#if _MSC_VER >= 1200
#pragma warning( disable: 4711 4324 )
#endif
#define RBS_THROW_EOS -123 /* <end of stream> exception code */
#define RBS_THROW_FORB -124 /* <forrbidden huffman code> exception code */
#define RBS_HUFF_FORB 2047 /* forrbidden huffman code "value" */
typedef unsigned char uchar;
typedef unsigned long ulong;
// class RBaseStream - base class for other reading streams.
class RBaseStream
{
public:
//methods
RBaseStream();
virtual ~RBaseStream();
virtual bool Open( const char* filename );
virtual void Close();
void SetBlockSize( int block_size, int unGetsize = 4 );
bool IsOpened();
void SetPos( int pos );
int GetPos();
void Skip( int bytes );
jmp_buf& JmpBuf();
protected:
jmp_buf m_jmp_buf;
uchar* m_start;
uchar* m_end;
uchar* m_current;
FILE* m_file;
int m_unGetsize;
int m_block_size;
int m_block_pos;
bool m_jmp_set;
bool m_is_opened;
virtual void ReadBlock();
virtual void Release();
virtual void Allocate();
};
// class RLByteStream - uchar-oriented stream.
// l in prefix means that the least significant uchar of a multi-uchar value goes first
class RLByteStream : public RBaseStream
{
public:
virtual ~RLByteStream();
int GetByte();
void GetBytes( void* buffer, int count, int* readed = 0 );
int GetWord();
int GetDWord();
};
// class RMBitStream - uchar-oriented stream.
// m in prefix means that the most significant uchar of a multi-uchar value go first
class RMByteStream : public RLByteStream
{
public:
virtual ~RMByteStream();
int GetWord();
int GetDWord();
};
// class RLBitStream - bit-oriented stream.
// l in prefix means that the least significant bit of a multi-bit value goes first
class RLBitStream : public RBaseStream
{
public:
virtual ~RLBitStream();
void SetPos( int pos );
int GetPos();
int Get( int bits );
int Show( int bits );
int GetHuff( const short* table );
void Move( int shift );
void Skip( int bytes );
protected:
int m_bit_idx;
virtual void ReadBlock();
};
// class RMBitStream - bit-oriented stream.
// m in prefix means that the most significant bit of a multi-bit value goes first
class RMBitStream : public RLBitStream
{
public:
virtual ~RMBitStream();
void SetPos( int pos );
int GetPos();
int Get( int bits );
int Show( int bits );
int GetHuff( const short* table );
void Move( int shift );
void Skip( int bytes );
protected:
virtual void ReadBlock();
};
// WBaseStream - base class for output streams
class WBaseStream
{
public:
//methods
WBaseStream();
virtual ~WBaseStream();
virtual bool Open( const char* filename );
virtual void Close();
void SetBlockSize( int block_size );
bool IsOpened();
int GetPos();
protected:
uchar* m_start;
uchar* m_end;
uchar* m_current;
int m_block_size;
int m_block_pos;
FILE* m_file;
bool m_is_opened;
virtual void WriteBlock();
virtual void Release();
virtual void Allocate();
};
// class WLByteStream - uchar-oriented stream.
// l in prefix means that the least significant uchar of a multi-byte value goes first
class WLByteStream : public WBaseStream
{
public:
virtual ~WLByteStream();
void PutByte( int val );
void PutBytes( const void* buffer, int count );
void PutWord( int val );
void PutDWord( int val );
};
// class WLByteStream - uchar-oriented stream.
// m in prefix means that the least significant uchar of a multi-byte value goes last
class WMByteStream : public WLByteStream
{
public:
virtual ~WMByteStream();
void PutWord( int val );
void PutDWord( int val );
};
// class WLBitStream - bit-oriented stream.
// l in prefix means that the least significant bit of a multi-bit value goes first
class WLBitStream : public WBaseStream
{
public:
virtual ~WLBitStream();
int GetPos();
void Put( int val, int bits );
void PutHuff( int val, const int* table );
protected:
int m_bit_idx;
int m_val;
virtual void WriteBlock();
};
// class WMBitStream - bit-oriented stream.
// l in prefix means that the least significant bit of a multi-bit value goes first
class WMBitStream : public WBaseStream
{
public:
WMBitStream();
virtual ~WMBitStream();
bool Open( const char* filename );
void Close();
virtual void Flush();
int GetPos();
void Put( int val, int bits );
void PutHuff( int val, const ulong* table );
protected:
int m_bit_idx;
ulong m_pad_val;
ulong m_val;
virtual void WriteBlock();
void ResetBuffer();
};
#define BSWAP(v) (((v)<<24)|(((v)&0xff00)<<8)| \
(((v)>>8)&0xff00)|((unsigned)(v)>>24))
int* bsCreateSourceHuffmanTable( const uchar* src, int* dst,
int max_bits, int first_bits );
bool bsCreateDecodeHuffmanTable( const int* src, short* dst, int max_size );
bool bsCreateEncodeHuffmanTable( const int* src, ulong* dst, int max_size );
void bsBSwapBlock( uchar *start, uchar *end );
bool bsIsBigEndian( void );
extern const ulong bs_bit_mask[];
#endif/*_BITSTRM_H_*/
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