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# Ap4Expandable.h

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    00001 /*****************************************************************
    00002 |
    00003 |    AP4 - Expandable base class
    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_EXPANDABLE_H_
    00030 #define _AP4_EXPANDABLE_H_
    00031
    00032 /*----------------------------------------------------------------------
    00033 |   includes
    00034 +---------------------------------------------------------------------*/
    00035 #include "Ap4Types.h"
    00036 #include "Ap4DataBuffer.h"
    00037
    00038 /*----------------------------------------------------------------------
    00039 |   class references
    00040 +---------------------------------------------------------------------*/
    00041 class AP4_ByteStream;
    00042 class AP4_AtomInspector;
    00043
    00044 /*----------------------------------------------------------------------
    00045 |   AP4_Expandable
    00046 +---------------------------------------------------------------------*/
    00047 class AP4_Expandable
    00048 {
    00049  public:
    00050     // types
    00051     enum ClassIdSize {
    00052         CLASS_ID_SIZE_08,
    00053         CLASS_ID_SIZE_16
    00054     };
    00055
    00056     // class methods
    00057     static AP4_Size MinHeaderSize(AP4_Size payload_size);
    00058
    00059     // methods
    00060     AP4_Expandable(AP4_UI32    class_id,
    00061                    ClassIdSize class_id_size,
    00062                    AP4_Size    header_size,
    00063                    AP4_Size    payload_size);
    00064     virtual ~AP4_Expandable() {}
    00065     AP4_UI32           GetClassId()    { return m_ClassId;                  }
    00066     AP4_Size           GetSize()       { return m_PayloadSize+m_HeaderSize; }
    00067     AP4_Size           GetHeaderSize() { return m_HeaderSize;               }
    00068     virtual AP4_Result Write(AP4_ByteStream& stream);
    00069     virtual AP4_Result WriteFields(AP4_ByteStream& stream) = 0;
    00070     virtual AP4_Result Inspect(AP4_AtomInspector& inspector);
    00071
    00072  protected:
    00073     // members
    00074     AP4_UI32    m_ClassId;
    00075     ClassIdSize m_ClassIdSize;
    00076     AP4_Size    m_HeaderSize;
    00077     AP4_Size    m_PayloadSize;
    00078 };
    00079
    00080 /*----------------------------------------------------------------------
    00081 |   AP4_UnknownExpandable
    00082 +---------------------------------------------------------------------*/
    00083 class AP4_UnknownExpandable : public AP4_Expandable
    00084 {
    00085 public:
    00086     // methods
    00087     AP4_UnknownExpandable(AP4_ByteStream& stream,
    00088                           AP4_UI32        class_id,
    00089                           ClassIdSize     class_id_size,
    00090                           AP4_Size        header_size,
    00091                           AP4_Size        payload_size);
    00092     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
    00093
    00094 private:
    00095     // members
    00096     AP4_DataBuffer m_Data;
    00097 };
    00098
    00099 #endif // _AP4_EXPANDABLE_H_