# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

dirac_cppparser.h
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1 /* ***** BEGIN LICENSE BLOCK *****
2 *
3 * $Id: dirac_cppparser.h,v 1.8 2008/05/02 06:05:04 asuraparaju Exp $ $Name: Dirac_1_0_2 $
4 *
5 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6 *
7 * The contents of this file are subject to the Mozilla Public License
8 * Version 1.1 (the "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 * http://www.mozilla.org/MPL/
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12 * Software distributed under the License is distributed on an "AS IS" basis,
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15 *
16 * The Original Code is BBC Research and Development code.
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18 * The Initial Developer of the Original Code is the British Broadcasting
19 * Corporation.
20 * Portions created by the Initial Developer are Copyright (C) 2004.
21 * All Rights Reserved.
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23 * Contributor(s): Anuradha Suraparaju (Original Author)
24 * Andrew Kennedy
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38
39
40
41 #ifndef DIRAC_CPPPARSER_H
42 #define DIRAC_CPPPARSER_H
43
44 #include <istream>
45 #include <streambuf>
46 #include <libdirac_decoder/decoder_types.h> //for DecoderState
47 #include <libdirac_common/common.h>
48 #include <libdirac_byteio/dirac_byte_stream.h>
49
50 namespace dirac
51 {
52 class SequenceDecompressor;
53 class Picture;
54
56 class InputStreamBuffer : public std::streambuf
57 {
58 public:
60 InputStreamBuffer ();
61
63 ~InputStreamBuffer();
64
66 std::ios::pos_type Rewind();
67
69
74 std::ios::pos_type Seek(std::ios::pos_type bytes,
75 std::ios::seekdir pos = std::ios::cur);
76
78 std::ios::pos_type Tell();
79
81
86 void Copy(char *start, int bytes);
87
89 void PurgeProcessedData();
90
91 private:
92
94 InputStreamBuffer (const InputStreamBuffer& inbuf);
95
97 InputStreamBuffer& operator = (const InputStreamBuffer& inbuf);
98
100 static const int m_buffer_size = 1232896;
101
103 char *m_chunk_buffer;
104 };
105
107
119 class DiracParser
120 {
121 public:
123
127 DiracParser(bool verbose = false );
128
130 ~DiracParser();
131
133
137 void SetBuffer (char *start, char *end);
138
140
149 DecoderState Parse();
150
152 const ParseParams& GetParseParams() const;
153
155 const SourceParams& GetSourceParams() const;
156
158 const PictureParams* GetNextPictureParams() const;
159
161 const Picture* GetNextPicture() const;
162
164 const DecoderParams& GetDecoderParams() const;
165
166 private:
167
168 private:
169
171 DiracParser (const DiracParser &dp);
173 DiracParser& operator = (const DiracParser &dp);
175 DecoderState m_state;
177 DecoderState m_next_state;
179 int m_show_pnum;
181 SequenceDecompressor *m_decomp;
183 bool m_verbose;
185 DiracByteStream m_dirac_byte_stream;
186 };
187
188 } // namespace dirac
189
190 #endif

© 2004 British Broadcasting Corporation. Dirac code licensed under the Mozilla Public License (MPL) Version 1.1.
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