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# Ap4TkhdAtom.h

    00001 /*****************************************************************
    00002 |
    00003 |    AP4 - tkhd Atoms
    00004 |
    00005 |    Copyright 2002 Gilles Boccon-Gibod
    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_TKHD_ATOM_H_
    00030 #define _AP4_TKHD_ATOM_H_
    00031
    00032 /*----------------------------------------------------------------------
    00033 |       includes
    00034 +---------------------------------------------------------------------*/
    00035 #include "Ap4.h"
    00036 #include "Ap4ByteStream.h"
    00037 #include "Ap4List.h"
    00038 #include "Ap4Atom.h"
    00039
    00040 /*----------------------------------------------------------------------
    00041 |       constants
    00042 +---------------------------------------------------------------------*/
    00043 const int AP4_TKHD_FLAG_TRACK_ENABLED    = 1;
    00044 const int AP4_TKHD_FLAG_TRACK_IN_MOVIE   = 2;
    00045 const int AP4_TKHD_FLAG_TRACK_IN_PREVIEW = 4;
    00046
    00047 const int AP4_TKHD_FLAG_DEFAULTS         = 7;
    00048
    00049 /*----------------------------------------------------------------------
    00050 |       AP4_TkhdAtom
    00051 +---------------------------------------------------------------------*/
    00052 class AP4_TkhdAtom : public AP4_Atom
    00053 {
    00054 public:
    00055     // methods
    00056     AP4_TkhdAtom(AP4_UI32 creation_time,
    00057                  AP4_UI32 modification_time,
    00058                  AP4_UI32 track_id,
    00059                  AP4_UI32 duration,
    00060                  AP4_UI16 volume,
    00061                  AP4_UI32 width,
    00062                  AP4_UI32 height);
    00063     AP4_TkhdAtom(AP4_Size size, AP4_ByteStream& stream);
    00064     virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
    00065     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
    00066
    00067     AP4_UI32   GetDuration() { return m_Duration; }
    00068     AP4_Result SetDuration(AP4_UI32 duration) {
    00069         m_Duration = duration;
    00070         return AP4_SUCCESS;
    00071     }
    00072     AP4_UI32   GetTrackId()  { return m_TrackId;  }
    00073     AP4_Result SetTrackId(AP4_UI32 track_id)  {
    00074         m_TrackId = track_id;
    00075         return AP4_SUCCESS;
    00076     }
    00077
    00078         void GetTranslation(AP4_Float& x, AP4_Float& y)
    00079         {
    00080                 x = (AP4_Float)(*(int*)&m_Matrix[6]) / 65536;
    00081                 y = (AP4_Float)(*(int*)&m_Matrix[7]) / 65536;
    00082         }
    00083
    00084  private:
    00085     // members
    00086     AP4_UI32 m_CreationTime;
    00087     AP4_UI32 m_ModificationTime;
    00088     AP4_UI32 m_TrackId;
    00089     AP4_UI32 m_Reserved1;
    00090     AP4_UI32 m_Duration;
    00091     AP4_UI08 m_DataVersion1[32];
    00092     AP4_UI32 m_Reserved2[2];
    00093     AP4_UI16 m_Layer;
    00094     AP4_UI16 m_AlternateGroup;
    00095     AP4_UI16 m_Volume;
    00096     AP4_UI16 m_Reserved3;
    00097     AP4_UI32 m_Matrix[9];
    00098     AP4_UI32 m_Width;
    00099     AP4_UI32 m_Height;
    00100 };
    00101
    00102 #endif // _AP4_TKHD_ATOM_H_