Bento4 MP4 SDK: Ap4EsDescriptor.h Source File

Bento4 MP4 SDK

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Ap4EsDescriptor.h

00001 /*****************************************************************
00002 |
00003 |    AP4 - ES Descriptor 
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_ES_DESCRIPTOR_H_
00030 #define _AP4_ES_DESCRIPTOR_H_
00031 
00032 /*----------------------------------------------------------------------
00033 |   includes
00034 +---------------------------------------------------------------------*/
00035 #include "Ap4List.h"
00036 #include "Ap4String.h"
00037 #include "Ap4Descriptor.h"
00038 #include "Ap4DecoderConfigDescriptor.h"
00039 
00040 /*----------------------------------------------------------------------
00041 |   class references
00042 +---------------------------------------------------------------------*/
00043 class AP4_ByteStream;
00044 
00045 /*----------------------------------------------------------------------
00046 |   constants
00047 +---------------------------------------------------------------------*/
00048 const AP4_UI08 AP4_DESCRIPTOR_TAG_ES        = 0x03;
00049 const AP4_UI08 AP4_DESCRIPTOR_TAG_ES_ID_INC = 0x0E;
00050 const AP4_UI08 AP4_DESCRIPTOR_TAG_ES_ID_REF = 0x0F;
00051 
00052 const int AP4_ES_DESCRIPTOR_FLAG_STREAM_DEPENDENCY = 1;
00053 const int AP4_ES_DESCRIPTOR_FLAG_URL               = 2;
00054 const int AP4_ES_DESCRIPTOR_FLAG_OCR_STREAM        = 4;
00055 
00056 /*----------------------------------------------------------------------
00057 |   AP4_EsDescriptor
00058 +---------------------------------------------------------------------*/
00059 class AP4_EsDescriptor : public AP4_Descriptor
00060 {
00061  public:
00062     AP4_IMPLEMENT_DYNAMIC_CAST_D(AP4_EsDescriptor, AP4_Descriptor)
00063 
00064     // methods
00065     AP4_EsDescriptor(AP4_UI16 es_id);
00066     AP4_EsDescriptor(AP4_ByteStream& stream, 
00067                      AP4_Size        header_size, 
00068                      AP4_Size        payload_size);
00069     ~AP4_EsDescriptor();
00070     virtual AP4_Result AddSubDescriptor(AP4_Descriptor* descriptor);
00071     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
00072     virtual AP4_Result Inspect(AP4_AtomInspector& inspector);
00073     virtual const AP4_DecoderConfigDescriptor* GetDecoderConfigDescriptor() const;    
00074 
00075  private:
00076     // members
00077     unsigned short                   m_EsId;
00078     unsigned short                   m_OcrEsId;
00079     AP4_Flags                        m_Flags;
00080     unsigned char                    m_StreamPriority;
00081     unsigned short                   m_DependsOn;
00082     AP4_String                       m_Url;
00083     mutable AP4_List<AP4_Descriptor> m_SubDescriptors;
00084 };
00085 
00086 /*----------------------------------------------------------------------
00087 |   AP4_EsIdIncDescriptor
00088 +---------------------------------------------------------------------*/
00089 class AP4_EsIdIncDescriptor : public AP4_Descriptor
00090 {
00091  public:
00092     AP4_IMPLEMENT_DYNAMIC_CAST_D(AP4_EsIdIncDescriptor, AP4_Descriptor)
00093 
00094     // methods
00095     AP4_EsIdIncDescriptor(AP4_UI32 track_id);
00096     AP4_EsIdIncDescriptor(AP4_ByteStream& stream, 
00097                           AP4_Size        header_size, 
00098                           AP4_Size        payload_size);
00099     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
00100     virtual AP4_Result Inspect(AP4_AtomInspector& inspector);
00101 
00102     // accessors
00103     AP4_UI32 GetTrackId() const { return m_TrackId; }
00104     
00105  private:
00106     // members
00107     AP4_UI32 m_TrackId;
00108 };
00109 
00110 /*----------------------------------------------------------------------
00111 |   AP4_EsIdRefDescriptor
00112 +---------------------------------------------------------------------*/
00113 class AP4_EsIdRefDescriptor : public AP4_Descriptor
00114 {
00115  public:
00116     AP4_IMPLEMENT_DYNAMIC_CAST_D(AP4_EsIdRefDescriptor, AP4_Descriptor)
00117 
00118     // methods
00119     AP4_EsIdRefDescriptor(AP4_UI16 ref_index);
00120     AP4_EsIdRefDescriptor(AP4_ByteStream& stream, 
00121                           AP4_Size        header_size, 
00122                           AP4_Size        payload_size);
00123     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
00124     virtual AP4_Result Inspect(AP4_AtomInspector& inspector);
00125 
00126     // accessors
00127     AP4_UI16 GetRefIndex() const { return m_RefIndex; }
00128     
00129  private:
00130     // members
00131     AP4_UI16 m_RefIndex;
00132 };
00133 
00134 #endif // _AP4_ES_DESCRIPTOR_H_
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