Ap4AtomFactory.h
Go to the documentation of this file.00001 /***************************************************************** 00002 | 00003 | AP4 - Atom Factory 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_ATOM_FACTORY_H_ 00030 #define _AP4_ATOM_FACTORY_H_ 00031 00032 /*---------------------------------------------------------------------- 00033 | includes 00034 +---------------------------------------------------------------------*/ 00035 #include "Ap4Types.h" 00036 #include "Ap4Atom.h" 00037 #include "Ap4Array.h" 00038 00039 /*---------------------------------------------------------------------- 00040 | class references 00041 +---------------------------------------------------------------------*/ 00042 class AP4_ByteStream; 00043 00044 /*---------------------------------------------------------------------- 00045 | AP4_AtomFactory 00046 +---------------------------------------------------------------------*/ 00047 class AP4_AtomFactory { 00048 public: 00049 // types 00050 class TypeHandler { 00051 public: 00052 virtual ~TypeHandler() {}; 00053 virtual AP4_Result CreateAtom(AP4_Atom::Type type, 00054 AP4_UI32 size, 00055 AP4_ByteStream& stream, 00056 AP4_Atom::Type context, 00057 AP4_Atom*& atom) = 0; 00058 }; 00059 00060 // constructor 00061 AP4_AtomFactory() {} 00062 00063 // destructor 00064 virtual ~AP4_AtomFactory(); 00065 00066 // methods 00067 AP4_Result AddTypeHandler(TypeHandler* handler); 00068 AP4_Result RemoveTypeHandler(TypeHandler* handler); 00069 AP4_Result CreateAtomFromStream(AP4_ByteStream& stream, 00070 AP4_LargeSize& bytes_available, 00071 AP4_Atom*& atom); 00072 virtual AP4_Result CreateAtomFromStream(AP4_ByteStream& stream, 00073 AP4_UI32 type, 00074 AP4_UI32 size_32, 00075 AP4_UI64 size_64, 00076 AP4_Atom*& atom); 00077 AP4_Result CreateAtomFromStream(AP4_ByteStream& stream, 00078 AP4_Atom*& atom); 00079 AP4_Result CreateAtomsFromStream(AP4_ByteStream& stream, 00080 AP4_AtomParent& atoms); 00081 AP4_Result CreateAtomsFromStream(AP4_ByteStream& stream, 00082 AP4_LargeSize bytes_available, 00083 AP4_AtomParent& atoms); 00084 00085 // context 00086 void PushContext(AP4_Atom::Type context); 00087 void PopContext(); 00088 AP4_Atom::Type GetContext(AP4_Ordinal depth=0); 00089 00090 private: 00091 // members 00092 AP4_Array<AP4_Atom::Type> m_ContextStack; 00093 AP4_List<TypeHandler> m_TypeHandlers; 00094 }; 00095 00096 /*---------------------------------------------------------------------- 00097 | AP4_DefaultAtomFactory 00098 +---------------------------------------------------------------------*/ 00099 class AP4_DefaultAtomFactory : public AP4_AtomFactory { 00100 public: 00101 // class members 00102 static AP4_DefaultAtomFactory Instance; 00103 00104 // constructor 00105 AP4_DefaultAtomFactory(); 00106 }; 00107 00108 #endif // _AP4_ATOM_FACTORY_H_
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