Ap4Descriptor.h
Go to the documentation of this file.00001 /***************************************************************** 00002 | 00003 | AP4 - Descriptors 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_DESCRIPTOR_H_ 00030 #define _AP4_DESCRIPTOR_H_ 00031 00032 /*---------------------------------------------------------------------- 00033 | includes 00034 +---------------------------------------------------------------------*/ 00035 #include "Ap4Expandable.h" 00036 #include "Ap4List.h" 00037 #include "Ap4DynamicCast.h" 00038 00039 /*---------------------------------------------------------------------- 00040 | class references 00041 +---------------------------------------------------------------------*/ 00042 class AP4_ByteStream; 00043 class AP4_AtomInspector; 00044 00045 /*---------------------------------------------------------------------- 00046 | AP4_Descriptor 00047 +---------------------------------------------------------------------*/ 00048 class AP4_Descriptor : public AP4_Expandable 00049 { 00050 public: 00051 AP4_IMPLEMENT_DYNAMIC_CAST(AP4_Descriptor) 00052 00053 // constructor 00054 AP4_Descriptor(AP4_UI08 tag, AP4_Size header_size, AP4_Size payload_size) : 00055 AP4_Expandable(tag, CLASS_ID_SIZE_08, header_size, payload_size) {} 00056 00057 // AP4_Exandable methods 00058 virtual AP4_Result Inspect(AP4_AtomInspector& inspector); 00059 00060 // methods 00061 AP4_UI08 GetTag() { return (AP4_UI08)m_ClassId; } 00062 }; 00063 00064 /*---------------------------------------------------------------------- 00065 | AP4_UnknownDescriptor 00066 +---------------------------------------------------------------------*/ 00067 class AP4_UnknownDescriptor : public AP4_Descriptor 00068 { 00069 public: 00070 // contrusctor 00071 AP4_UnknownDescriptor(AP4_ByteStream& stream, 00072 AP4_UI08 tag, 00073 AP4_Size header_size, 00074 AP4_Size payload_size); 00075 00076 // AP4_Expandable methods 00077 virtual AP4_Result WriteFields(AP4_ByteStream& stream); 00078 00079 private: 00080 // members 00081 AP4_DataBuffer m_Data; 00082 }; 00083 00084 /*---------------------------------------------------------------------- 00085 | AP4_DescriptorFinder 00086 +---------------------------------------------------------------------*/ 00087 class AP4_DescriptorFinder : public AP4_List<AP4_Descriptor>::Item::Finder 00088 { 00089 public: 00090 AP4_DescriptorFinder(AP4_UI08 tag) : m_Tag(tag) {} 00091 AP4_Result Test(AP4_Descriptor* descriptor) const { 00092 return descriptor->GetTag() == m_Tag ? AP4_SUCCESS : AP4_FAILURE; 00093 } 00094 00095 private: 00096 AP4_UI08 m_Tag; 00097 }; 00098 00099 /*---------------------------------------------------------------------- 00100 | AP4_DescriptorListWriter 00101 +---------------------------------------------------------------------*/ 00102 class AP4_DescriptorListWriter : public AP4_List<AP4_Descriptor>::Item::Operator 00103 { 00104 public: 00105 AP4_DescriptorListWriter(AP4_ByteStream& stream) : 00106 m_Stream(stream) {} 00107 AP4_Result Action(AP4_Descriptor* descriptor) const { 00108 return descriptor->Write(m_Stream); 00109 } 00110 00111 private: 00112 AP4_ByteStream& m_Stream; 00113 }; 00114 00115 /*---------------------------------------------------------------------- 00116 | AP4_DescriptorListInspector 00117 +---------------------------------------------------------------------*/ 00118 class AP4_DescriptorListInspector : public AP4_List<AP4_Descriptor>::Item::Operator 00119 { 00120 public: 00121 AP4_DescriptorListInspector(AP4_AtomInspector& inspector) : 00122 m_Inspector(inspector) {} 00123 AP4_Result Action(AP4_Descriptor* descriptor) const { 00124 descriptor->Inspect(m_Inspector); 00125 return AP4_SUCCESS; 00126 } 00127 00128 private: 00129 AP4_AtomInspector& m_Inspector; 00130 }; 00131 00132 #endif // _AP4_DESCRIPTOR_H_
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