Created by the British Broadcasting Corporation.
00001 /* ***** BEGIN LICENSE BLOCK ***** 00002 * 00003 * $Id: parseunit_byteio.h,v 1.5 2007/09/28 15:46:08 asuraparaju Exp $ $Name: Dirac_0_8_0 $ 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): Andrew Kennedy (Original Author) 00024 * 00025 * Alternatively, the contents of this file may be used under the terms of 00026 * the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser 00027 * Public License Version 2.1 (the "LGPL"), in which case the provisions of 00028 * the GPL or the LGPL are applicable instead of those above. If you wish to 00029 * allow use of your version of this file only under the terms of the either 00030 * the GPL or LGPL and not to allow others to use your version of this file 00031 * under the MPL, indicate your decision by deleting the provisions above 00032 * and replace them with the notice and other provisions required by the GPL 00033 * or LGPL. If you do not delete the provisions above, a recipient may use 00034 * your version of this file under the terms of any one of the MPL, the GPL 00035 * or the LGPL. 00036 * ***** END LICENSE BLOCK ***** */ 00037 00041 #ifndef parseunit_byteio_h 00042 #define parseunit_byteio_h 00043 00044 //SYSTEM INLUDES 00045 #include <map> // Byte-map 00046 #include <string> // stores values 00047 00048 //LOCAL INCLUDES 00049 #include "byteio.h" // Parent class 00050 00051 00052 namespace dirac 00053 { 00054 00055 /* Types of parse-unit */ 00056 typedef enum { 00057 PU_ACCESS_UNIT=0, 00058 PU_FRAME, 00059 PU_END_OF_SEQUENCE, 00060 PU_AUXILIARY_DATA, 00061 PU_PADDING_DATA, 00062 PU_LOW_DELAY_FRAME, 00063 PU_UNDEFINED 00064 } ParseUnitType; 00065 00070 class ParseUnitByteIO : public ByteIO 00071 { 00072 public: 00073 00077 ParseUnitByteIO(); 00078 00083 ParseUnitByteIO(const ByteIO& byte_io); 00084 00089 ParseUnitByteIO(const ParseUnitByteIO& parseunit_byteio); 00090 00094 ~ParseUnitByteIO(); 00095 00100 virtual void CollateByteStats(DiracByteStats& dirac_byte_stats); 00101 00106 bool Input(); // decoding 00107 00112 bool IsValid(const ParseUnitByteIO& next_unit); 00113 00118 bool Skip(); 00119 00123 virtual const std::string GetBytes(); // encoding 00124 00129 void SetAdjacentParseUnits(ParseUnitByteIO *p_prev_parseunit); // encoding 00130 00131 /* 00132 * Gets number of bytes input/output within unit 00133 */ 00134 virtual int GetSize() const; 00135 00139 int GetNextParseOffset() const; 00140 00144 int GetPreviousParseOffset() const; 00145 00149 virtual ParseUnitType GetType() const; 00150 00151 protected: 00152 00157 virtual int CalcNextUnitOffset(); 00158 00163 virtual unsigned char CalcParseCode() const { return 0;} // encoding 00164 00169 bool SyncToUnitStart(); // decoding 00170 00174 unsigned char GetParseCode() const { return m_parse_code;} 00175 00179 bool IsAU() const 00180 { return m_parse_code==0x00; } 00181 00185 bool IsEndOfSequence() const 00186 { return m_parse_code==0x10; } 00187 00191 bool IsAuxiliaryData() const 00192 { return m_parse_code==0x20; } 00193 00197 bool IsPaddingData() const 00198 { return m_parse_code==0x30; } 00199 00203 bool IsPicture() const 00204 { return ((m_parse_code&0x08)==0x08); } 00205 00209 bool IsLowDelay() const 00210 { return ((m_parse_code&0x80)==0x80); } 00211 00215 bool IsCoreSyntax() const 00216 { return ((m_parse_code&0xB8)==0x08); } 00217 00221 bool IsUsingAC() const 00222 { return ((m_parse_code&0x40)==0x40); } 00223 00224 private: 00225 00229 int m_previous_parse_offset; 00230 00234 int m_next_parse_offset; 00235 00239 unsigned char m_parse_code; 00240 00241 }; 00242 00243 00244 } // namespace dirac 00245 00246 #endif
© 2004 British Broadcasting Corporation.
Dirac code licensed under the Mozilla Public License (MPL) Version 1.1.
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