зеркало из https://github.com/mozilla/gecko-dev.git
115 строки
3.9 KiB
C++
115 строки
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DecodedStream_h_
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#define DecodedStream_h_
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#include "nsRefPtr.h"
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#include "nsTArray.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/gfx/Point.h"
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namespace mozilla {
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class MediaInputPort;
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class SourceMediaStream;
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class ProcessedMediaStream;
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class DecodedStream;
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class DecodedStreamGraphListener;
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class OutputStreamListener;
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class ReentrantMonitor;
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class MediaStreamGraph;
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namespace layers {
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class Image;
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}
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/*
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* All MediaStream-related data is protected by the decoder's monitor.
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* We have at most one DecodedStreamDaata per MediaDecoder. Its stream
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* is used as the input for each ProcessedMediaStream created by calls to
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* captureStream(UntilEnded). Seeking creates a new source stream, as does
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* replaying after the input as ended. In the latter case, the new source is
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* not connected to streams created by captureStreamUntilEnded.
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*/
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class DecodedStreamData {
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public:
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DecodedStreamData(int64_t aInitialTime, SourceMediaStream* aStream);
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~DecodedStreamData();
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bool IsFinished() const;
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int64_t GetClock() const;
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/* The following group of fields are protected by the decoder's monitor
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* and can be read or written on any thread.
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*/
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// Count of audio frames written to the stream
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int64_t mAudioFramesWritten;
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// Saved value of aInitialTime. Timestamp of the first audio and/or
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// video packet written.
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const int64_t mInitialTime; // microseconds
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// mNextVideoTime is the end timestamp for the last packet sent to the stream.
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// Therefore video packets starting at or after this time need to be copied
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// to the output stream.
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int64_t mNextVideoTime; // microseconds
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int64_t mNextAudioTime; // microseconds
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// The last video image sent to the stream. Useful if we need to replicate
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// the image.
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nsRefPtr<layers::Image> mLastVideoImage;
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gfx::IntSize mLastVideoImageDisplaySize;
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// This is set to true when the stream is initialized (audio and
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// video tracks added).
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bool mStreamInitialized;
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bool mHaveSentFinish;
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bool mHaveSentFinishAudio;
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bool mHaveSentFinishVideo;
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// The decoder is responsible for calling Destroy() on this stream.
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const nsRefPtr<SourceMediaStream> mStream;
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nsRefPtr<DecodedStreamGraphListener> mListener;
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// True when we've explicitly blocked this stream because we're
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// not in PLAY_STATE_PLAYING. Used on the main thread only.
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bool mHaveBlockedForPlayState;
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// We also have an explicit blocker on the stream when
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// mDecoderStateMachine is non-null and MediaDecoderStateMachine is false.
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bool mHaveBlockedForStateMachineNotPlaying;
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// True if we need to send a compensation video frame to ensure the
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// StreamTime going forward.
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bool mEOSVideoCompensation;
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};
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class OutputStreamData {
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public:
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~OutputStreamData();
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void Init(DecodedStream* aDecodedStream, ProcessedMediaStream* aStream);
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nsRefPtr<ProcessedMediaStream> mStream;
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// mPort connects DecodedStreamData::mStream to our mStream.
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nsRefPtr<MediaInputPort> mPort;
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nsRefPtr<OutputStreamListener> mListener;
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};
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class DecodedStream {
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public:
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explicit DecodedStream(ReentrantMonitor& aMonitor);
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DecodedStreamData* GetData() const;
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void DestroyData();
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void RecreateData(int64_t aInitialTime, MediaStreamGraph* aGraph);
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nsTArray<OutputStreamData>& OutputStreams();
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ReentrantMonitor& GetReentrantMonitor() const;
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void Connect(ProcessedMediaStream* aStream, bool aFinishWhenEnded);
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private:
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void Connect(OutputStreamData* aStream);
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UniquePtr<DecodedStreamData> mData;
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// Data about MediaStreams that are being fed by the decoder.
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nsTArray<OutputStreamData> mOutputStreams;
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ReentrantMonitor& mMonitor;
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};
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} // namespace mozilla
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#endif // DecodedStream_h_
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