Bento4 MP4 SDK: Ap4SttsAtom.h Source File

Bento4 MP4 SDK

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Ap4SttsAtom.h

00001 /*****************************************************************
00002 |
00003 |    AP4 - stts 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_STTS_ATOM_H_
00030 #define _AP4_STTS_ATOM_H_
00031 
00032 /*----------------------------------------------------------------------
00033 |   includes
00034 +---------------------------------------------------------------------*/
00035 #include "Ap4Array.h"
00036 #include "Ap4Atom.h"
00037 
00038 /*----------------------------------------------------------------------
00039 |   AP4_SttsTableEntry
00040 +---------------------------------------------------------------------*/
00041 class AP4_SttsTableEntry {
00042  public:
00043     AP4_SttsTableEntry() : 
00044         m_SampleCount(0), 
00045         m_SampleDuration(0) {}
00046     AP4_SttsTableEntry(AP4_UI32 sample_count,
00047                        AP4_UI32 sample_duration) :
00048         m_SampleCount(sample_count),
00049         m_SampleDuration(sample_duration) {}
00050 
00051     AP4_UI32 m_SampleCount;
00052     AP4_UI32 m_SampleDuration;
00053 };
00054 
00055 /*----------------------------------------------------------------------
00056 |   AP4_SttsAtom
00057 +---------------------------------------------------------------------*/
00058 class AP4_SttsAtom : public AP4_Atom
00059 {
00060 public:
00061     AP4_IMPLEMENT_DYNAMIC_CAST_D(AP4_SttsAtom, AP4_Atom)
00062 
00063     // class methods
00064     static AP4_SttsAtom* Create(AP4_Size size, AP4_ByteStream& stream);
00065 
00066     // methods
00067     AP4_SttsAtom();
00068     virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
00069     virtual AP4_Result GetDts(AP4_Ordinal sample, AP4_UI64& dts, AP4_UI32* duration = NULL);
00070     virtual AP4_Result AddEntry(AP4_UI32 sample_count, AP4_UI32 sample_duration);
00071     virtual AP4_Result GetSampleIndexForTimeStamp(AP4_UI64      ts, 
00072                                                   AP4_Ordinal&  sample_index);
00073     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
00074 
00075 private:
00076     // methods
00077     AP4_SttsAtom(AP4_UI32        size, 
00078                  AP4_UI32        version,
00079                  AP4_UI32        flags,
00080                  AP4_ByteStream& stream);
00081 
00082     // members
00083     AP4_Array<AP4_SttsTableEntry> m_Entries;
00084     struct {
00085         AP4_Ordinal entry_index;
00086         AP4_Ordinal sample;
00087         AP4_UI64    dts;
00088     } m_LookupCache;
00089 };
00090 
00091 #endif // _AP4_STTS_ATOM_H_
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