00001 /***************************************************************** 00002 | 00003 | AP4 - Descriptors 00004 | 00005 | Copyright 2002-2006 Gilles Boccon-Gibod & Julien Boeuf 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 00038 /*---------------------------------------------------------------------- 00039 | class references 00040 +---------------------------------------------------------------------*/ 00041 class AP4_ByteStream; 00042 class AP4_AtomInspector; 00043 00044 /*---------------------------------------------------------------------- 00045 | AP4_Descriptor 00046 +---------------------------------------------------------------------*/ 00047 class AP4_Descriptor : public AP4_Expandable 00048 { 00049 public: 00050 // constructor 00051 AP4_Descriptor(AP4_UI08 tag, AP4_Size header_size, AP4_Size payload_size) : 00052 AP4_Expandable(tag, CLASS_ID_SIZE_08, header_size, payload_size) {} 00053 00054 // AP4_Exandable methods 00055 virtual AP4_Result Inspect(AP4_AtomInspector& inspector); 00056 00057 // methods 00058 AP4_UI08 GetTag() { return (AP4_UI08)m_ClassId; } 00059 }; 00060 00061 /*---------------------------------------------------------------------- 00062 | AP4_UnknownDescriptor 00063 +---------------------------------------------------------------------*/ 00064 class AP4_UnknownDescriptor : public AP4_Descriptor 00065 { 00066 public: 00067 // contrusctor 00068 AP4_UnknownDescriptor(AP4_ByteStream& stream, 00069 AP4_UI08 tag, 00070 AP4_Size header_size, 00071 AP4_Size payload_size); 00072 00073 // AP4_Expandable methods 00074 virtual AP4_Result WriteFields(AP4_ByteStream& stream); 00075 00076 private: 00077 // members 00078 AP4_DataBuffer m_Data; 00079 }; 00080 00081 /*---------------------------------------------------------------------- 00082 | AP4_DescriptorFinder 00083 +---------------------------------------------------------------------*/ 00084 class AP4_DescriptorFinder : public AP4_List<AP4_Descriptor>::Item::Finder 00085 { 00086 public: 00087 AP4_DescriptorFinder(AP4_UI08 tag) : m_Tag(tag) {} 00088 AP4_Result Test(AP4_Descriptor* descriptor) const { 00089 return descriptor->GetTag() == m_Tag ? AP4_SUCCESS : AP4_FAILURE; 00090 } 00091 private: 00092 AP4_UI08 m_Tag; 00093 }; 00094 00095 /*---------------------------------------------------------------------- 00096 | AP4_DescriptorListWriter 00097 +---------------------------------------------------------------------*/ 00098 class AP4_DescriptorListWriter : public AP4_List<AP4_Descriptor>::Item::Operator 00099 { 00100 public: 00101 AP4_DescriptorListWriter(AP4_ByteStream& stream) : 00102 m_Stream(stream) {} 00103 AP4_Result Action(AP4_Descriptor* descriptor) const { 00104 return descriptor->Write(m_Stream); 00105 } 00106 00107 private: 00108 AP4_ByteStream& m_Stream; 00109 }; 00110 00111 /*---------------------------------------------------------------------- 00112 | AP4_DescriptorListInspector 00113 +---------------------------------------------------------------------*/ 00114 class AP4_DescriptorListInspector : public AP4_List<AP4_Descriptor>::Item::Operator 00115 { 00116 public: 00117 AP4_DescriptorListInspector(AP4_AtomInspector& inspector) : 00118 m_Inspector(inspector) {} 00119 AP4_Result Action(AP4_Descriptor* descriptor) const { 00120 descriptor->Inspect(m_Inspector); 00121 return AP4_SUCCESS; 00122 } 00123 00124 private: 00125 AP4_AtomInspector& m_Inspector; 00126 }; 00127 00128 #endif // _AP4_DESCRIPTOR_H_