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# Ap4TkhdAtom.h

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    00001 /*****************************************************************
    00002 |
    00003 |    AP4 - tkhd 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_TKHD_ATOM_H_
    00030 #define _AP4_TKHD_ATOM_H_
    00031
    00032 /*----------------------------------------------------------------------
    00033 |   includes
    00034 +---------------------------------------------------------------------*/
    00035 #include "Ap4Atom.h"
    00036
    00037 /*----------------------------------------------------------------------
    00038 |   constants
    00039 +---------------------------------------------------------------------*/
    00040 const int AP4_TKHD_FLAG_TRACK_ENABLED    = 1;
    00041 const int AP4_TKHD_FLAG_TRACK_IN_MOVIE   = 2;
    00042 const int AP4_TKHD_FLAG_TRACK_IN_PREVIEW = 4;
    00043
    00044 const int AP4_TKHD_FLAG_DEFAULTS         = 7;
    00045
    00046 /*----------------------------------------------------------------------
    00047 |   AP4_TkhdAtom
    00048 +---------------------------------------------------------------------*/
    00049 class AP4_TkhdAtom : public AP4_Atom
    00050 {
    00051 public:
    00052     // class methods
    00053     static AP4_TkhdAtom* Create(AP4_Size size, AP4_ByteStream& stream);
    00054
    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     virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
    00064     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
    00065
    00066     AP4_UI32   GetDuration() { return m_Duration; }
    00067     AP4_Result SetDuration(AP4_UI32 duration) {
    00068         m_Duration = duration;
    00069         return AP4_SUCCESS;
    00070     }
    00071     AP4_UI32   GetTrackId()  { return m_TrackId;  }
    00072     AP4_Result SetTrackId(AP4_UI32 track_id)  {
    00073         m_TrackId = track_id;
    00074         return AP4_SUCCESS;
    00075     }
    00076
    00077     void GetTranslation(float& x, float& y) {
    00078         x = (float)(*(int*)&m_Matrix[6]) / 65536;
    00079         y = (float)(*(int*)&m_Matrix[7]) / 65536;
    00080     }
    00081
    00082     AP4_UI32 GetWidth()  { return m_Width; }
    00083     AP4_UI32 GetHeight() { return m_Height;}
    00084
    00085  private:
    00086     // methods
    00087     AP4_TkhdAtom(AP4_UI32        size,
    00088                  AP4_UI32        version,
    00089                  AP4_UI32        flags,
    00090                  AP4_ByteStream& stream);
    00091
    00092     // members
    00093     AP4_UI32 m_CreationTimeH;
    00094     AP4_UI32 m_CreationTime;
    00095     AP4_UI32 m_ModificationTimeH;
    00096     AP4_UI32 m_ModificationTime;
    00097     AP4_UI32 m_TrackId;
    00098     AP4_UI32 m_Reserved1;
    00099     AP4_UI32 m_DurationH;
    00100     AP4_UI32 m_Duration;
    00101     AP4_UI32 m_Reserved2[2];
    00102     AP4_UI16 m_Layer;
    00103     AP4_UI16 m_AlternateGroup;
    00104     AP4_UI16 m_Volume;
    00105     AP4_UI16 m_Reserved3;
    00106     AP4_UI32 m_Matrix[9];
    00107     AP4_UI32 m_Width;
    00108     AP4_UI32 m_Height;
    00109 };
    00110
    00111 #endif // _AP4_TKHD_ATOM_H_