rle_decoder.hpp

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00001 /*
00002   CLAW - a C++ Library Absolutely Wonderful
00003 
00004   CLAW is a free library without any particular aim but being useful to 
00005   anyone.
00006 
00007   Copyright (C) 2005-2008 Julien Jorge
00008 
00009   This library is free software; you can redistribute it and/or
00010   modify it under the terms of the GNU Lesser General Public
00011   License as published by the Free Software Foundation; either
00012   version 2.1 of the License, or (at your option) any later version.
00013 
00014   This library is distributed in the hope that it will be useful,
00015   but WITHOUT ANY WARRANTY; without even the implied warranty of
00016   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017   Lesser General Public License for more details.
00018 
00019   You should have received a copy of the GNU Lesser General Public
00020   License along with this library; if not, write to the Free Software
00021   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00022 
00023   contact: julien_jorge@yahoo.fr
00024 */
00030 #ifndef __CLAW_RLE_DECODER_HPP__
00031 #define __CLAW_RLE_DECODER_HPP__
00032 
00033 namespace claw
00034 {
00053   template< typename Pattern, typename InputBuffer, typename OutputBuffer >
00054   class rle_decoder
00055   {
00056   public:
00058     typedef Pattern pattern_type;
00059 
00061     typedef InputBuffer input_buffer_type;
00062 
00064     typedef OutputBuffer output_buffer_type;
00065 
00066   protected:
00070     enum mode
00071       {
00073         stop,
00074 
00076         raw,
00077 
00079         compressed
00080       }; // enum mode
00081 
00082   public:
00083     rle_decoder();
00084     virtual ~rle_decoder();
00085 
00086     void decode( input_buffer_type& input, output_buffer_type& output );
00087   
00088   protected:
00089     virtual void read_mode( input_buffer_type& input,
00090                             output_buffer_type& output ) = 0;
00091 
00092   protected:
00094     mode m_mode;
00095 
00101     unsigned int m_count;
00102 
00104     pattern_type m_pattern;
00105   }; // class rle_decoder
00106 } // namespace claw
00107 
00108 #include <claw/impl/rle_decoder.tpp>
00109 
00110 #endif // __CLAW_RLE_DECODER_HPP__

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