# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

# dirac_cppparser.h

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    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.
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