Dirac - A Video Codec

Created by the British Broadcasting Corporation.


dirac_cppparser.h

Go to the documentation of this file.
00001 /* ***** BEGIN LICENSE BLOCK *****
00002 *
00003 * $Id: dirac_cppparser.h,v 1.8 2008/05/02 06:05:04 asuraparaju Exp $ $Name: Dirac_1_0_2 $
00004 *
00005 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00006 *
00007 * The contents of this file are subject to the Mozilla Public License
00008 * Version 1.1 (the "License"); you may not use this file except in compliance
00009 * with the License. You may obtain a copy of the License at
00010 * http://www.mozilla.org/MPL/
00011 *
00012 * Software distributed under the License is distributed on an "AS IS" basis,
00013 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
00014 * the specific language governing rights and limitations under the License.
00015 *
00016 * The Original Code is BBC Research and Development code.
00017 *
00018 * The Initial Developer of the Original Code is the British Broadcasting
00019 * Corporation.
00020 * Portions created by the Initial Developer are Copyright (C) 2004.
00021 * All Rights Reserved.
00022 *
00023 * Contributor(s): Anuradha Suraparaju (Original Author)
00024 *                 Andrew Kennedy
00025 *
00026 * Alternatively, the contents of this file may be used under the terms of
00027 * the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser
00028 * Public License Version 2.1 (the "LGPL"), in which case the provisions of
00029 * the GPL or the LGPL are applicable instead of those above. If you wish to
00030 * allow use of your version of this file only under the terms of the either
00031 * the GPL or LGPL and not to allow others to use your version of this file
00032 * under the MPL, indicate your decision by deleting the provisions above
00033 * and replace them with the notice and other provisions required by the GPL
00034 * or LGPL. If you do not delete the provisions above, a recipient may use
00035 * your version of this file under the terms of any one of the MPL, the GPL
00036 * or the LGPL.
00037 * ***** END LICENSE BLOCK ***** */
00038 
00039 
00040 
00041 #ifndef DIRAC_CPPPARSER_H
00042 #define DIRAC_CPPPARSER_H
00043 
00044 #include <istream>
00045 #include <streambuf>
00046 #include <libdirac_decoder/decoder_types.h> //for DecoderState
00047 #include <libdirac_common/common.h>
00048 #include <libdirac_byteio/dirac_byte_stream.h>
00049 
00050 namespace dirac
00051 {
00052     class SequenceDecompressor;
00053     class Picture;
00054 
00056     class InputStreamBuffer : public std::streambuf
00057     {
00058     public:
00060         InputStreamBuffer ();
00061 
00063         ~InputStreamBuffer();
00064 
00066         std::ios::pos_type Rewind();
00067 
00069 
00074         std::ios::pos_type Seek(std::ios::pos_type bytes,
00075                                 std::ios::seekdir pos = std::ios::cur);
00076 
00078         std::ios::pos_type Tell();
00079 
00081 
00086         void Copy(char *start, int bytes);
00087 
00089         void PurgeProcessedData();
00090 
00091     private:
00092 
00094         InputStreamBuffer (const InputStreamBuffer& inbuf);
00095 
00097         InputStreamBuffer& operator = (const InputStreamBuffer& inbuf);
00098 
00100         static const int m_buffer_size = 1232896;
00101 
00103         char *m_chunk_buffer;
00104     };
00105 
00107 
00119     class DiracParser
00120     {
00121     public:
00123 
00127         DiracParser(bool verbose = false );
00128 
00130         ~DiracParser();
00131 
00133 
00137         void SetBuffer (char *start, char *end);
00138 
00140 
00149         DecoderState Parse();
00150 
00152         const ParseParams& GetParseParams() const;
00153 
00155         const SourceParams& GetSourceParams() const;
00156 
00158         const PictureParams* GetNextPictureParams() const;
00159 
00161         const Picture* GetNextPicture() const;
00162 
00164         const DecoderParams& GetDecoderParams() const;
00165 
00166     private:
00167 
00168     private:
00169 
00171         DiracParser (const DiracParser &dp);
00173         DiracParser& operator = (const DiracParser &dp);
00175         DecoderState m_state;
00177         DecoderState m_next_state;
00179         int m_show_pnum;
00181         SequenceDecompressor *m_decomp;
00183         bool m_verbose;
00185         DiracByteStream m_dirac_byte_stream;
00186     };
00187 
00188 } // namespace dirac
00189 
00190 #endif

© 2004 British Broadcasting Corporation. Dirac code licensed under the Mozilla Public License (MPL) Version 1.1.
HTML documentation generated by Dimitri van Heesch's excellent Doxygen tool.