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106 lines
3.8 KiB
C++
106 lines
3.8 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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/*----------------------------------------------------------------------
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| includes
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+---------------------------------------------------------------------*/
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#include "Ap4SampleSource.h"
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#include "Ap4Track.h"
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#include "Ap4SampleDescription.h"
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#include "Ap4DataBuffer.h"
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/*----------------------------------------------------------------------
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| AP4_TrackSampleSource
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+---------------------------------------------------------------------*/
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AP4_TrackSampleSource::AP4_TrackSampleSource(AP4_Track* track) :
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m_Track(track),
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m_SampleIndex(0)
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{
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}
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/*----------------------------------------------------------------------
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| AP4_TrackSampleSource
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+---------------------------------------------------------------------*/
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AP4_UI32
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AP4_TrackSampleSource::GetTimeScale()
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{
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return m_Track->GetMediaTimeScale();
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}
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/*----------------------------------------------------------------------
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| AP4_TrackSampleSource::GetDurationMs
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+---------------------------------------------------------------------*/
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AP4_UI32
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AP4_TrackSampleSource::GetDurationMs()
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{
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return m_Track->GetDurationMs();
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}
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/*----------------------------------------------------------------------
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| AP4_TrackSampleSource::ReadNextSample
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_TrackSampleSource::ReadNextSample(AP4_Sample& sample, AP4_DataBuffer& buffer, AP4_UI32& track_id)
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{
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AP4_Result result = m_Track->ReadSample(m_SampleIndex, sample, buffer);
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if (AP4_SUCCEEDED(result)) {
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++m_SampleIndex;
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track_id = m_Track->GetId();
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} else {
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track_id = 0;
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}
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return result;
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}
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/*----------------------------------------------------------------------
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| AP4_TrackSampleSource::SeekToTime
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_TrackSampleSource::SeekToTime(AP4_UI32 time_ms, bool before)
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{
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AP4_Ordinal sample_index = 0;
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AP4_Result result = m_Track->GetSampleIndexForTimeStampMs(time_ms, sample_index);
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if (AP4_FAILED(result)) return result;
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if (sample_index >= m_Track->GetSampleCount()) return AP4_ERROR_OUT_OF_RANGE;
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sample_index = m_Track->GetNearestSyncSampleIndex(sample_index, before);
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if (sample_index >= m_Track->GetSampleCount()) return AP4_ERROR_OUT_OF_RANGE;
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m_SampleIndex = sample_index;
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_TrackSampleSource::GetSampleDescription
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+---------------------------------------------------------------------*/
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AP4_SampleDescription*
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AP4_TrackSampleSource::GetSampleDescription(AP4_Ordinal indx)
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{
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return m_Track->GetSampleDescription(indx);
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}
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