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