Bento4 MP4 SDK: Ap4SyntheticSampleTable.h Source File

Bento4 MP4 SDK

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Ap4SyntheticSampleTable.h

00001 /*****************************************************************
00002 |
00003 |    AP4 - Synthetic Sample Table
00004 |
00005 |    Copyright 2002-2008 Axiomatic Systems, LLC
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_SYNTHETIC_SAMPLE_TABLE_H_
00030 #define _AP4_SYNTHETIC_SAMPLE_TABLE_H_
00031 
00032 /*----------------------------------------------------------------------
00033 |   includes
00034 +---------------------------------------------------------------------*/
00035 #include "Ap4Array.h"
00036 #include "Ap4List.h"
00037 #include "Ap4Sample.h"
00038 #include "Ap4SampleTable.h"
00039 #include "Ap4SampleDescription.h"
00040 
00041 /*----------------------------------------------------------------------
00042 |   forward declarations
00043 +---------------------------------------------------------------------*/
00044 class AP4_ByteStream;
00045 
00046 /*----------------------------------------------------------------------
00047 |   constants
00048 +---------------------------------------------------------------------*/
00049 const AP4_Cardinal AP4_SYNTHETIC_SAMPLE_TABLE_DEFAULT_CHUNK_SIZE = 10;
00050 
00051 /*----------------------------------------------------------------------
00052 |   AP4_SyntheticSampleTable
00053 +---------------------------------------------------------------------*/
00054 class AP4_SyntheticSampleTable : public AP4_SampleTable
00055 {
00056  public:
00057     // methods
00058              AP4_SyntheticSampleTable(AP4_Cardinal chunk_size 
00059                                       = AP4_SYNTHETIC_SAMPLE_TABLE_DEFAULT_CHUNK_SIZE);
00060     virtual ~AP4_SyntheticSampleTable();
00061 
00062     // AP4_SampleTable methods
00063     virtual AP4_Result GetSample(AP4_Ordinal index, AP4_Sample& sample);
00064     virtual AP4_Cardinal GetSampleCount();
00065     virtual AP4_Result   GetSampleChunkPosition(AP4_Ordinal  sample_index, 
00066                                                 AP4_Ordinal& chunk_index,
00067                                                 AP4_Ordinal& position_in_chunk);
00068     virtual AP4_Cardinal GetSampleDescriptionCount();
00069     virtual AP4_SampleDescription* GetSampleDescription(AP4_Ordinal index);
00070     virtual AP4_Result GetSampleIndexForTimeStamp(AP4_UI64 ts, AP4_Ordinal& index);
00071     virtual AP4_Ordinal  GetNearestSyncSampleIndex(AP4_Ordinal index, bool before);
00072 
00073     // methods
00086     virtual AP4_Result AddSampleDescription(AP4_SampleDescription* description,
00087                                             bool                   transfer_ownership=true);
00088 
00113     virtual AP4_Result AddSample(AP4_ByteStream& data_stream,
00114                                  AP4_Position    offset,
00115                                  AP4_Size        size,
00116                                  AP4_UI32        duration,
00117                                  AP4_Ordinal     description_index,
00118                                  AP4_UI64        dts,
00119                                  AP4_UI32        cts_delta,
00120                                  bool            sync);
00121 
00122 private:
00123     // classes
00124     class SampleDescriptionHolder {
00125     public:
00126         SampleDescriptionHolder(AP4_SampleDescription* description, bool is_owned) :
00127             m_SampleDescription(description), m_IsOwned(is_owned) {}
00128         ~SampleDescriptionHolder() { if (m_IsOwned) delete m_SampleDescription; }
00129         AP4_SampleDescription* m_SampleDescription;
00130         bool                   m_IsOwned;
00131     };
00132         
00133     // members
00134     AP4_Array<AP4_Sample>             m_Samples;
00135     AP4_List<SampleDescriptionHolder> m_SampleDescriptions;
00136     AP4_Cardinal                      m_ChunkSize;
00137     AP4_Array<AP4_UI32>               m_SamplesInChunk;
00138     struct {
00139         AP4_Ordinal m_Sample;
00140         AP4_Ordinal m_Chunk;
00141     } m_LookupCache;
00142 };
00143 
00144 #endif // _AP4_SYNTHETIC_SAMPLE_TABLE_H_
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