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# Ap4MdhdAtom.h

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    00001 /*****************************************************************
    00002 |
    00003 |    AP4 - mdhd Atoms
    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_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     // class methods
    00051     static AP4_MdhdAtom* Create(AP4_Size size, AP4_ByteStream& stream);
    00052
    00053     // methods
    00054     AP4_MdhdAtom(AP4_UI32    creation_time,
    00055                  AP4_UI32    modification_time,
    00056                  AP4_UI32    time_scale,
    00057                  AP4_UI32    duration,
    00058                  const char* language);
    00059     virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
    00060     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
    00061
    00062     AP4_UI32   GetDurationMs();
    00063     AP4_UI32   GetDuration()  { return m_Duration;  }
    00064     AP4_UI32   GetTimeScale() { return m_TimeScale; }
    00065     AP4_String GetLanguage()  { return AP4_String(m_Language, 3); }
    00066
    00067 private:
    00068     // methods
    00069     AP4_MdhdAtom(AP4_UI32        size,
    00070                  AP4_UI32        version,
    00071                  AP4_UI32        flags,
    00072                  AP4_ByteStream& stream);
    00073
    00074     // members
    00075     AP4_UI32 m_CreationTimeH;
    00076     AP4_UI32 m_CreationTime;
    00077     AP4_UI32 m_ModificationTimeH;
    00078     AP4_UI32 m_ModificationTime;
    00079     AP4_UI32 m_TimeScale;
    00080     AP4_UI32 m_DurationH;
    00081     AP4_UI32 m_Duration;
    00082     char     m_Language[3];
    00083 };
    00084
    00085 #endif // _AP4_MDHD_ATOM_H_