95 lines
3.9 KiB
C++
95 lines
3.9 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 "nsAutoPtr.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();
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virtual TrackUnionStream* AsTrackUnionStream() override { return this; }
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friend class DOMMediaStream;
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void RemoveInput(MediaInputPort* aPort) override;
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void ProcessInput(GraphTime aFrom, GraphTime aTo, uint32_t aFlags) override;
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void SetTrackEnabledImpl(TrackID aTrackID, DisabledTrackMode aMode) override;
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MediaStream* GetInputStreamFor(TrackID aTrackID) override;
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TrackID GetInputTrackIDFor(TrackID aTrackID) override;
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friend class MediaStreamGraphImpl;
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protected:
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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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StreamTime 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 StreamTracks::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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// These are direct track listeners that have been added to this
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// TrackUnionStream-track and forwarded to the input track. We will update
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// these when this track's disabled status changes.
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nsTArray<RefPtr<DirectMediaStreamTrackListener>> mOwnedDirectListeners;
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};
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// Add the track to this stream, retaining its TrackID if it has never
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// been previously used in this stream, allocating a new TrackID otherwise.
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uint32_t AddTrack(MediaInputPort* aPort, StreamTracks::Track* aTrack,
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GraphTime aFrom);
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void EndTrack(uint32_t aIndex);
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void CopyTrackData(StreamTracks::Track* aInputTrack,
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uint32_t aMapIndex, GraphTime aFrom, GraphTime aTo,
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bool* aOutputTrackFinished);
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void AddDirectTrackListenerImpl(already_AddRefed<DirectMediaStreamTrackListener> aListener,
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TrackID aTrackID) override;
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void RemoveDirectTrackListenerImpl(DirectMediaStreamTrackListener* aListener,
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TrackID aTrackID) override;
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nsTArray<TrackMapEntry> mTrackMap;
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// The next available TrackID, starting at 1 and progressing upwards.
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// All TrackIDs in [1, mNextAvailableTrackID) have implicitly been used.
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TrackID mNextAvailableTrackID;
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// Sorted array of used TrackIDs that require manual tracking.
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nsTArray<TrackID> mUsedTracks;
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// Direct track listeners that have not been forwarded to their input stream
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// yet. We'll forward these as their inputs become available.
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nsTArray<TrackBound<DirectMediaStreamTrackListener>> mPendingDirectTrackListeners;
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};
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} // namespace mozilla
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#endif /* MOZILLA_MEDIASTREAMGRAPH_H_ */
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