Ap4Expandable.h
Go to the documentation of this file.00001 /***************************************************************** 00002 | 00003 | AP4 - Expandable base class 00004 | 00005 | Copyright 2002-2008 Axiomatic Systems, LLC 00006 | 00007 | 00008 | This file is part of Bento4/AP4 (MP4 Atom Processing Library). 00009 | 00010 | Unless you have obtained Bento4 under a difference license, 00011 | this version of Bento4 is Bento4|GPL. 00012 | Bento4|GPL is free software; you can redistribute it and/or modify 00013 | it under the terms of the GNU General Public License as published by 00014 | the Free Software Foundation; either version 2, or (at your option) 00015 | any later version. 00016 | 00017 | Bento4|GPL is distributed in the hope that it will be useful, 00018 | but WITHOUT ANY WARRANTY; without even the implied warranty of 00019 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00020 | GNU General Public License for more details. 00021 | 00022 | You should have received a copy of the GNU General Public License 00023 | along with Bento4|GPL; see the file COPYING. If not, write to the 00024 | Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 00025 | 02111-1307, USA. 00026 | 00027 ****************************************************************/ 00028 00029 #ifndef _AP4_EXPANDABLE_H_ 00030 #define _AP4_EXPANDABLE_H_ 00031 00032 /*---------------------------------------------------------------------- 00033 | includes 00034 +---------------------------------------------------------------------*/ 00035 #include "Ap4Types.h" 00036 #include "Ap4DataBuffer.h" 00037 00038 /*---------------------------------------------------------------------- 00039 | class references 00040 +---------------------------------------------------------------------*/ 00041 class AP4_ByteStream; 00042 class AP4_AtomInspector; 00043 00044 /*---------------------------------------------------------------------- 00045 | AP4_Expandable 00046 +---------------------------------------------------------------------*/ 00047 class AP4_Expandable 00048 { 00049 public: 00050 // types 00051 enum ClassIdSize { 00052 CLASS_ID_SIZE_08 00053 }; 00054 00055 // class methods 00056 static AP4_Size MinHeaderSize(AP4_Size payload_size); 00057 00058 // methods 00059 AP4_Expandable(AP4_UI32 class_id, 00060 ClassIdSize class_id_size, 00061 AP4_Size header_size, 00062 AP4_Size payload_size); 00063 virtual ~AP4_Expandable() {} 00064 AP4_UI32 GetClassId() { return m_ClassId; } 00065 AP4_Size GetSize() { return m_PayloadSize+m_HeaderSize; } 00066 AP4_Size GetHeaderSize() { return m_HeaderSize; } 00067 virtual AP4_Result Write(AP4_ByteStream& stream); 00068 virtual AP4_Result WriteFields(AP4_ByteStream& stream) = 0; 00069 virtual AP4_Result Inspect(AP4_AtomInspector& inspector); 00070 00071 protected: 00072 // members 00073 AP4_UI32 m_ClassId; 00074 ClassIdSize m_ClassIdSize; 00075 AP4_Size m_HeaderSize; 00076 AP4_Size m_PayloadSize; 00077 }; 00078 00079 /*---------------------------------------------------------------------- 00080 | AP4_UnknownExpandable 00081 +---------------------------------------------------------------------*/ 00082 class AP4_UnknownExpandable : public AP4_Expandable 00083 { 00084 public: 00085 // methods 00086 AP4_UnknownExpandable(AP4_ByteStream& stream, 00087 AP4_UI32 class_id, 00088 ClassIdSize class_id_size, 00089 AP4_Size header_size, 00090 AP4_Size payload_size); 00091 virtual AP4_Result WriteFields(AP4_ByteStream& stream); 00092 00093 private: 00094 // members 00095 AP4_DataBuffer m_Data; 00096 }; 00097 00098 #endif // _AP4_EXPANDABLE_H_
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