Bento4 MP4 SDK: Ap4MdhdAtom.h Source File

Bento4 MP4 SDK

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Ap4MdhdAtom.h

00001 /*****************************************************************
00002 |
00003 |    AP4 - mdhd 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_MDHD_ATOM_H_
00030 #define _AP4_MDHD_ATOM_H_
00031 
00032 /*----------------------------------------------------------------------
00033 |   includes
00034 +---------------------------------------------------------------------*/
00035 #include "Ap4Atom.h"
00036 #include "Ap4String.h"
00037 
00038 /*----------------------------------------------------------------------
00039 |   constants
00040 +---------------------------------------------------------------------*/
00041 const AP4_UI32 AP4_MDHD_DEFAULT_GENERIC_TIMESCALE = 1000;
00042 const AP4_UI32 AP4_MDHD_DEFAULT_VIDEO_TIMESCALE   = 90000;
00043 
00044 /*----------------------------------------------------------------------
00045 |   AP4_MdhdAtom
00046 +---------------------------------------------------------------------*/
00047 class AP4_MdhdAtom : public AP4_Atom
00048 {
00049 public:
00050     AP4_IMPLEMENT_DYNAMIC_CAST_D(AP4_MdhdAtom, AP4_Atom)
00051 
00052     // class methods
00053     static AP4_MdhdAtom* Create(AP4_Size size, AP4_ByteStream& stream);
00054 
00055     // methods
00056     AP4_MdhdAtom(AP4_UI32    creation_time,
00057                  AP4_UI32    modification_time,
00058                  AP4_UI32    time_scale,
00059                  AP4_UI64    duration,
00060                  const char* language);
00061     virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
00062     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
00063 
00064     AP4_UI32          GetDurationMs();
00065     AP4_UI64          GetDuration()  { return m_Duration;  }
00066     void              SetDuration(AP4_UI64 duration) { m_Duration = duration; }
00067     AP4_UI32          GetTimeScale() { return m_TimeScale; }
00068     void              SetTimeScale(AP4_UI32 timescale) { m_TimeScale = timescale; }
00069     const AP4_String& GetLanguage()  { return m_Language;  }
00070 
00071 private:
00072     // methods
00073     AP4_MdhdAtom(AP4_UI32        size, 
00074                  AP4_UI32        version,
00075                  AP4_UI32        flags,
00076                  AP4_ByteStream& stream);
00077 
00078     // members
00079     AP4_UI64   m_CreationTime;
00080     AP4_UI64   m_ModificationTime;
00081     AP4_UI32   m_TimeScale;
00082     AP4_UI64   m_Duration;
00083     AP4_String m_Language;
00084 };
00085 
00086 #endif // _AP4_MDHD_ATOM_H_
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