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100 lines
3.3 KiB
C++
100 lines
3.3 KiB
C++
/*****************************************************************
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| AP4 - Sample Source Interface
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| Copyright 2002-2009 Axiomatic Systems, LLC
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| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
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| Unless you have obtained Bento4 under a difference license,
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| this version of Bento4 is Bento4|GPL.
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| Bento4|GPL is free software; you can redistribute it and/or modify
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| it under the terms of the GNU General Public License as published by
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| the Free Software Foundation; either version 2, or (at your option)
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| any later version.
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| Bento4|GPL is distributed in the hope that it will be useful,
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| but WITHOUT ANY WARRANTY; without even the implied warranty of
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| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| GNU General Public License for more details.
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| You should have received a copy of the GNU General Public License
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| along with Bento4|GPL; see the file COPYING. If not, write to the
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| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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| 02111-1307, USA.
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****************************************************************/
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#ifndef _AP4_SAMPLE_SOURCE_H_
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#define _AP4_SAMPLE_SOURCE_H_
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/*----------------------------------------------------------------------
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| includes
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+---------------------------------------------------------------------*/
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#include "Ap4Types.h"
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/*----------------------------------------------------------------------
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| class references
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+---------------------------------------------------------------------*/
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class AP4_Sample;
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class AP4_SampleDescription;
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class AP4_Track;
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class AP4_DataBuffer;
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/*----------------------------------------------------------------------
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| AP4_SampleSource
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+---------------------------------------------------------------------*/
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class AP4_SampleSource
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{
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public:
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virtual ~AP4_SampleSource() {}
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/**
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* Return the timscale of the sample's media
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*/
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virtual AP4_UI32 GetTimeScale() = 0;
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/**
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* Return the duration in milliseconds
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*/
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virtual AP4_UI32 GetDurationMs() = 0;
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/**
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* Read the next sample from the source
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*/
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virtual AP4_Result ReadNextSample(AP4_Sample& sample, AP4_DataBuffer& buffer, AP4_UI32& track_id) = 0;
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/**
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* Seek to the sample closest to a specific timestamp in milliseconds
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*/
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virtual AP4_Result SeekToTime(AP4_UI32 time_ms, bool before=true) = 0;
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/**
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* Return a sample description by index.
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* Returns NULL if there is no sample description with the requested index.
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*/
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virtual AP4_SampleDescription* GetSampleDescription(AP4_Ordinal indx) = 0;
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};
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/*----------------------------------------------------------------------
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| AP4_TrackSampleSource
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+---------------------------------------------------------------------*/
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class AP4_TrackSampleSource : public AP4_SampleSource
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{
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public:
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AP4_TrackSampleSource(AP4_Track* track);
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virtual AP4_UI32 GetTimeScale();
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virtual AP4_UI32 GetDurationMs();
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virtual AP4_Result ReadNextSample(AP4_Sample& sample, AP4_DataBuffer& buffer, AP4_UI32& track_id);
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virtual AP4_Result SeekToTime(AP4_UI32 time_ms, bool before=true) = 0;
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virtual AP4_SampleDescription* GetSampleDescription(AP4_Ordinal indx);
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private:
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AP4_Track* m_Track;
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AP4_Ordinal m_SampleIndex;
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};
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#endif // _AP4_SAMPLE_SOURCE_H_
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