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# Ap4StscAtom.h

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    00001 /*****************************************************************
    00002 |
    00003 |    AP4 - stsc 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_STSC_ATOM_H_
    00030 #define _AP4_STSC_ATOM_H_
    00031
    00032 /*----------------------------------------------------------------------
    00033 |   includes
    00034 +---------------------------------------------------------------------*/
    00035 #include "Ap4Types.h"
    00036 #include "Ap4Atom.h"
    00037 #include "Ap4Array.h"
    00038
    00039 /*----------------------------------------------------------------------
    00040 |   AP4_StscTableEntry
    00041 +---------------------------------------------------------------------*/
    00042 class AP4_StscTableEntry {
    00043  public:
    00044     AP4_StscTableEntry() :
    00045         m_FirstChunk(0),
    00046         m_FirstSample(0),
    00047         m_ChunkCount(0),
    00048         m_SamplesPerChunk(0),
    00049         m_SampleDescriptionIndex(0) {}
    00050     AP4_StscTableEntry(AP4_Ordinal  first_chunk,
    00051                        AP4_Ordinal  first_sample,
    00052                        AP4_Cardinal samples_per_chunk,
    00053                        AP4_Ordinal  sample_description_index) :
    00054         m_FirstChunk(first_chunk),
    00055         m_FirstSample(first_sample),
    00056         m_ChunkCount(0),
    00057         m_SamplesPerChunk(samples_per_chunk),
    00058         m_SampleDescriptionIndex(sample_description_index) {}
    00059     AP4_StscTableEntry(AP4_Ordinal  first_chunk,
    00060                        AP4_Ordinal  first_sample,
    00061                        AP4_Cardinal chunk_count,
    00062                        AP4_Cardinal samples_per_chunk,
    00063                        AP4_Ordinal  sample_description_index) :
    00064         m_FirstChunk(first_chunk),
    00065         m_FirstSample(first_sample),
    00066         m_ChunkCount(chunk_count),
    00067         m_SamplesPerChunk(samples_per_chunk),
    00068         m_SampleDescriptionIndex(sample_description_index) {}
    00069     AP4_Ordinal  m_FirstChunk;
    00070     AP4_Ordinal  m_FirstSample;  // computed (not in file)
    00071     AP4_Cardinal m_ChunkCount;   // computed (not in file)
    00072     AP4_Cardinal m_SamplesPerChunk;
    00073     AP4_Ordinal  m_SampleDescriptionIndex;
    00074 };
    00075
    00076 /*----------------------------------------------------------------------
    00077 |   AP4_StscAtom
    00078 +---------------------------------------------------------------------*/
    00079 class AP4_StscAtom : public AP4_Atom
    00080 {
    00081 public:
    00082     // class methods
    00083     static AP4_StscAtom* Create(AP4_Size size, AP4_ByteStream& stream);
    00084
    00085     // methods
    00086     AP4_StscAtom();
    00087     virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
    00088     virtual AP4_Result GetChunkForSample(AP4_Ordinal   sample,
    00089                                          AP4_Ordinal&  chunk,
    00090                                          AP4_Ordinal&  skip,
    00091                                          AP4_Ordinal&  sample_description_index);
    00092     virtual AP4_Result AddEntry(AP4_Cardinal chunk_count,
    00093                                 AP4_Cardinal samples_per_chunk,
    00094                                 AP4_Ordinal  sample_description_index);
    00095     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
    00096
    00097 private:
    00098     // methods
    00099     AP4_StscAtom(AP4_UI32        size,
    00100                  AP4_UI32        version,
    00101                  AP4_UI32        flags,
    00102                  AP4_ByteStream& stream);
    00103
    00104     // members
    00105     AP4_Array<AP4_StscTableEntry> m_Entries;
    00106     AP4_Ordinal                   m_CachedChunkGroup;
    00107 };
    00108
    00109 #endif // _AP4_STSC_ATOM_H_