2011-11-22 21:28:15 +00:00
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/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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2011-12-06 16:14:59 +00:00
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This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
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2011-11-22 21:28:15 +00:00
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Doom 3 Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#ifndef __COMPRESSOR_H__
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#define __COMPRESSOR_H__
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/*
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===============================================================================
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idCompressor is a layer ontop of idFile which provides lossless data
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compression. The compressor can be used as a regular file and multiple
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compressors can be stacked ontop of each other.
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===============================================================================
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*/
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class idCompressor : public idFile {
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public:
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// compressor allocation
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static idCompressor * AllocNoCompression( void );
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static idCompressor * AllocBitStream( void );
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static idCompressor * AllocRunLength( void );
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static idCompressor * AllocRunLength_ZeroBased( void );
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static idCompressor * AllocHuffman( void );
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static idCompressor * AllocArithmetic( void );
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static idCompressor * AllocLZSS( void );
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static idCompressor * AllocLZSS_WordAligned( void );
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static idCompressor * AllocLZW( void );
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// initialization
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virtual void Init( idFile *f, bool compress, int wordLength ) = 0;
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virtual void FinishCompress( void ) = 0;
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virtual float GetCompressionRatio( void ) const = 0;
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// common idFile interface
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virtual const char * GetName( void ) = 0;
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virtual const char * GetFullPath( void ) = 0;
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virtual int Read( void *outData, int outLength ) = 0;
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virtual int Write( const void *inData, int inLength ) = 0;
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virtual int Length( void ) = 0;
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virtual ID_TIME_T Timestamp( void ) = 0;
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virtual int Tell( void ) = 0;
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virtual void ForceFlush( void ) = 0;
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virtual void Flush( void ) = 0;
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virtual int Seek( long offset, fsOrigin_t origin ) = 0;
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};
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#endif /* !__COMPRESSOR_H__ */
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