Ap4TrunAtom.h
Go to the documentation of this file.00001 /***************************************************************** 00002 | 00003 | AP4 - trun Atoms 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_TRUN_ATOM_H_ 00030 #define _AP4_TRUN_ATOM_H_ 00031 00032 /*---------------------------------------------------------------------- 00033 | includes 00034 +---------------------------------------------------------------------*/ 00035 #include "Ap4Atom.h" 00036 #include "Ap4Array.h" 00037 00038 /*---------------------------------------------------------------------- 00039 | constants 00040 +---------------------------------------------------------------------*/ 00041 const AP4_UI32 AP4_TRUN_FLAG_DATA_OFFSET_PRESENT = 0x0001; 00042 const AP4_UI32 AP4_TRUN_FLAG_FIRST_SAMPLE_FLAGS_PRESENT = 0x0004; 00043 const AP4_UI32 AP4_TRUN_FLAG_SAMPLE_DURATION_PRESENT = 0x0100; 00044 const AP4_UI32 AP4_TRUN_FLAG_SAMPLE_SIZE_PRESENT = 0x0200; 00045 const AP4_UI32 AP4_TRUN_FLAG_SAMPLE_FLAGS_PRESENT = 0x0400; 00046 const AP4_UI32 AP4_TRUN_FLAG_SAMPLE_COMPOSITION_TIME_OFFSET_PRESENT = 0x0800; 00047 00048 /*---------------------------------------------------------------------- 00049 | AP4_TrunAtom 00050 +---------------------------------------------------------------------*/ 00051 class AP4_TrunAtom : public AP4_Atom 00052 { 00053 public: 00054 AP4_IMPLEMENT_DYNAMIC_CAST(AP4_TrunAtom) 00055 00056 // types 00057 struct Entry { 00058 Entry() : sample_duration(0), sample_size(0), sample_flags(0), sample_composition_time_offset(0) {} 00059 AP4_UI32 sample_duration; 00060 AP4_UI32 sample_size; 00061 AP4_UI32 sample_flags; 00062 AP4_UI32 sample_composition_time_offset; 00063 }; 00064 00065 // class methods 00066 static AP4_TrunAtom* Create(AP4_Size size, AP4_ByteStream& stream); 00067 static unsigned int ComputeOptionalFieldsCount(AP4_UI32 flags); 00068 static unsigned int ComputeRecordFieldsCount(AP4_UI32 flags); 00069 00070 // methods 00071 AP4_TrunAtom(AP4_UI32 flags, 00072 AP4_SI32 data_offset, 00073 AP4_UI32 first_sample_flags); 00074 virtual AP4_Result InspectFields(AP4_AtomInspector& inspector); 00075 virtual AP4_Result WriteFields(AP4_ByteStream& stream); 00076 00077 // accessors 00078 AP4_SI32 GetDataOffset() { return m_DataOffset; } 00079 AP4_UI32 GetFirstSampleFlags() { return m_FirstSampleFlags; } 00080 const AP4_Array<Entry>& GetEntries() { return m_Entries; } 00081 00082 private: 00083 // methods 00084 AP4_TrunAtom(AP4_UI32 size, 00085 AP4_UI32 version, 00086 AP4_UI32 flags, 00087 AP4_ByteStream& stream); 00088 00089 // members 00090 AP4_SI32 m_DataOffset; 00091 AP4_UI32 m_FirstSampleFlags; 00092 AP4_Array<Entry> m_Entries; 00093 }; 00094 00095 #endif // _AP4_TRUN_ATOM_H_
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