Bento4 MP4 SDK: Ap4CttsAtom.h Source File

Bento4 MP4 SDK

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Ap4CttsAtom.h

00001 /*****************************************************************
00002 |
00003 |    AP4 - ctts 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_CTTS_ATOM_H_
00030 #define _AP4_CTTS_ATOM_H_
00031 
00032 /*----------------------------------------------------------------------
00033 |   includes
00034 +---------------------------------------------------------------------*/
00035 #include "Ap4Atom.h"
00036 #include "Ap4Types.h"
00037 #include "Ap4Array.h"
00038 
00039 /*----------------------------------------------------------------------
00040 |   class references
00041 +---------------------------------------------------------------------*/
00042 class AP4_ByteStream;
00043 
00044 /*----------------------------------------------------------------------
00045 |   AP4_CttsTableEntry
00046 +---------------------------------------------------------------------*/
00047 class AP4_CttsTableEntry {
00048  public:
00049     AP4_CttsTableEntry() : 
00050         m_SampleCount(0), 
00051         m_SampleOffset(0) {}
00052     AP4_CttsTableEntry(AP4_UI32 sample_count,
00053                        AP4_UI32 sample_offset) :
00054         m_SampleCount(sample_count),
00055         m_SampleOffset(sample_offset) {}
00056 
00057     AP4_UI32 m_SampleCount;
00058     AP4_UI32 m_SampleOffset;
00059 };
00060 
00061 /*----------------------------------------------------------------------
00062 |   AP4_CttsAtom
00063 +---------------------------------------------------------------------*/
00064 class AP4_CttsAtom : public AP4_Atom
00065 {
00066 public:
00067     AP4_IMPLEMENT_DYNAMIC_CAST_D(AP4_CttsAtom, AP4_Atom)
00068 
00069     // class methods
00070     static AP4_CttsAtom* Create(AP4_UI32 size, AP4_ByteStream& stream);
00071 
00072     // constructor
00073     AP4_CttsAtom();
00074     
00075     // methods
00076     virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
00077     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
00078     AP4_Result AddEntry(AP4_UI32 count, AP4_UI32 cts_offset);
00079     AP4_Result GetCtsOffset(AP4_Ordinal sample, AP4_UI32& cts_offset);
00080 
00081 private:
00082     // methods
00083     AP4_CttsAtom(AP4_UI32        size, 
00084                  AP4_UI32        version,
00085                  AP4_UI32        flags,
00086                  AP4_ByteStream& stream);
00087 
00088     // members
00089     AP4_Array<AP4_CttsTableEntry> m_Entries;
00090     struct {
00091         AP4_Ordinal sample;
00092         AP4_Ordinal entry_index;
00093     } m_LookupCache;
00094 };
00095 
00096 #endif // _AP4_CTTS_ATOM_H_
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