Created by the British Broadcasting Corporation.
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.
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