Ap4SampleSource.h
Go to the documentation of this file.00001 /***************************************************************** 00002 | 00003 | AP4 - Sample Source Interface 00004 | 00005 | Copyright 2002-2009 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_SAMPLE_SOURCE_H_ 00030 #define _AP4_SAMPLE_SOURCE_H_ 00031 00032 /*---------------------------------------------------------------------- 00033 | includes 00034 +---------------------------------------------------------------------*/ 00035 #include "Ap4Types.h" 00036 00037 /*---------------------------------------------------------------------- 00038 | class references 00039 +---------------------------------------------------------------------*/ 00040 class AP4_Sample; 00041 class AP4_SampleDescription; 00042 class AP4_Track; 00043 class AP4_DataBuffer; 00044 00045 /*---------------------------------------------------------------------- 00046 | AP4_SampleSource 00047 +---------------------------------------------------------------------*/ 00048 class AP4_SampleSource 00049 { 00050 public: 00051 virtual ~AP4_SampleSource() {} 00052 00056 virtual AP4_UI32 GetTimeScale() = 0; 00057 00061 virtual AP4_UI32 GetDurationMs() = 0; 00062 00067 virtual AP4_UI32 GetTrackId() = 0; 00068 00072 virtual AP4_Result ReadNextSample(AP4_Sample& sample, AP4_DataBuffer& buffer) = 0; 00073 00077 virtual AP4_Ordinal GetNearestSyncSampleIndex(AP4_Ordinal indx, bool before=true) = 0; 00078 00082 virtual AP4_Result GetSampleIndexForTimeStampMs(AP4_UI32 timestamp, AP4_Ordinal& indx) = 0; 00083 00087 virtual AP4_Result SetSampleIndex(AP4_Ordinal indx) = 0; 00088 00093 virtual AP4_SampleDescription* GetSampleDescription(AP4_Ordinal indx) = 0; 00094 }; 00095 00096 /*---------------------------------------------------------------------- 00097 | AP4_TrackSampleSource 00098 +---------------------------------------------------------------------*/ 00099 class AP4_TrackSampleSource : public AP4_SampleSource 00100 { 00101 public: 00102 AP4_TrackSampleSource(AP4_Track* track); 00103 00104 virtual AP4_UI32 GetTimeScale(); 00105 virtual AP4_UI32 GetDurationMs(); 00106 virtual AP4_UI32 GetTrackId(); 00107 virtual AP4_Result ReadNextSample(AP4_Sample& sample, AP4_DataBuffer& buffer); 00108 virtual AP4_Ordinal GetNearestSyncSampleIndex(AP4_Ordinal indx, bool before=true); 00109 virtual AP4_Result GetSampleIndexForTimeStampMs(AP4_UI32 timestamp, AP4_Ordinal& indx); 00110 virtual AP4_Result SetSampleIndex(AP4_Ordinal indx); 00111 virtual AP4_SampleDescription* GetSampleDescription(AP4_Ordinal indx); 00112 00113 private: 00114 AP4_Track* m_Track; 00115 AP4_Ordinal m_SampleIndex; 00116 }; 00117 00118 #endif // _AP4_SAMPLE_SOURCE_H_
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