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74 lines
2.9 KiB
C++
74 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_TRACKUNIONSTREAM_H_
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#define MOZILLA_TRACKUNIONSTREAM_H_
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#include "MediaStreamGraph.h"
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#include <algorithm>
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namespace mozilla {
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/**
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* See MediaStreamGraph::CreateTrackUnionStream.
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*/
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class TrackUnionStream : public ProcessedMediaStream {
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public:
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explicit TrackUnionStream(DOMMediaStream* aWrapper);
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virtual void RemoveInput(MediaInputPort* aPort) MOZ_OVERRIDE;
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virtual void ProcessInput(GraphTime aFrom, GraphTime aTo, uint32_t aFlags) MOZ_OVERRIDE;
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// Consumers may specify a filtering callback to apply to every input track.
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// Returns true to allow the track to act as an input; false to reject it entirely.
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typedef bool (*TrackIDFilterCallback)(StreamBuffer::Track*);
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void SetTrackIDFilter(TrackIDFilterCallback aCallback);
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// Forward SetTrackEnabled(output_track_id, enabled) to the Source MediaStream,
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// translating the output track ID into the correct ID in the source.
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virtual void ForwardTrackEnabled(TrackID aOutputID, bool aEnabled) MOZ_OVERRIDE;
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protected:
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TrackIDFilterCallback mFilterCallback;
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// Only non-ended tracks are allowed to persist in this map.
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struct TrackMapEntry {
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// mEndOfConsumedInputTicks is the end of the input ticks that we've consumed.
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// 0 if we haven't consumed any yet.
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TrackTicks mEndOfConsumedInputTicks;
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// mEndOfLastInputIntervalInInputStream is the timestamp for the end of the
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// previous interval which was unblocked for both the input and output
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// stream, in the input stream's timeline, or -1 if there wasn't one.
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StreamTime mEndOfLastInputIntervalInInputStream;
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// mEndOfLastInputIntervalInOutputStream is the timestamp for the end of the
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// previous interval which was unblocked for both the input and output
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// stream, in the output stream's timeline, or -1 if there wasn't one.
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StreamTime mEndOfLastInputIntervalInOutputStream;
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MediaInputPort* mInputPort;
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// We keep track IDs instead of track pointers because
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// tracks can be removed without us being notified (e.g.
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// when a finished track is forgotten.) When we need a Track*,
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// we call StreamBuffer::FindTrack, which will return null if
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// the track has been deleted.
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TrackID mInputTrackID;
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TrackID mOutputTrackID;
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nsAutoPtr<MediaSegment> mSegment;
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};
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uint32_t AddTrack(MediaInputPort* aPort, StreamBuffer::Track* aTrack,
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GraphTime aFrom);
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void EndTrack(uint32_t aIndex);
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void CopyTrackData(StreamBuffer::Track* aInputTrack,
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uint32_t aMapIndex, GraphTime aFrom, GraphTime aTo,
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bool* aOutputTrackFinished);
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nsTArray<TrackMapEntry> mTrackMap;
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};
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}
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#endif /* MOZILLA_MEDIASTREAMGRAPH_H_ */
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