зеркало из https://github.com/mozilla/gecko-dev.git
398 строки
11 KiB
C++
398 строки
11 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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#include "DOMMediaStream.h"
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#include "nsContentUtils.h"
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#include "mozilla/dom/MediaStreamBinding.h"
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#include "mozilla/dom/LocalMediaStreamBinding.h"
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#include "mozilla/dom/AudioNode.h"
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#include "MediaStreamGraph.h"
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#include "AudioStreamTrack.h"
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#include "VideoStreamTrack.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMMediaStream)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_ENTRY(nsIDOMMediaStream)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMMediaStream)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMMediaStream)
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NS_IMPL_CYCLE_COLLECTION_CLASS(DOMMediaStream)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMMediaStream)
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tmp->Destroy();
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindow)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mTracks)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mConsumersToKeepAlive)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMMediaStream)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindow)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTracks)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mConsumersToKeepAlive)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(DOMMediaStream)
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NS_IMPL_ISUPPORTS_INHERITED1(DOMLocalMediaStream, DOMMediaStream,
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nsIDOMLocalMediaStream)
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NS_IMPL_CYCLE_COLLECTION_INHERITED_1(DOMAudioNodeMediaStream, DOMMediaStream,
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mStreamNode)
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NS_IMPL_ADDREF_INHERITED(DOMAudioNodeMediaStream, DOMMediaStream)
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NS_IMPL_RELEASE_INHERITED(DOMAudioNodeMediaStream, DOMMediaStream)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(DOMAudioNodeMediaStream)
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NS_INTERFACE_MAP_END_INHERITING(DOMMediaStream)
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class DOMMediaStream::StreamListener : public MediaStreamListener {
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public:
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StreamListener(DOMMediaStream* aStream)
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: mStream(aStream)
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{}
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// Main thread only
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void Forget() { mStream = nullptr; }
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DOMMediaStream* GetStream() { return mStream; }
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class TrackChange : public nsRunnable {
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public:
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TrackChange(StreamListener* aListener,
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TrackID aID, TrackTicks aTrackOffset,
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uint32_t aEvents, MediaSegment::Type aType)
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: mListener(aListener), mID(aID), mEvents(aEvents), mType(aType)
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{
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}
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NS_IMETHOD Run()
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{
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NS_ASSERTION(NS_IsMainThread(), "main thread only");
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DOMMediaStream* stream = mListener->GetStream();
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if (!stream) {
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return NS_OK;
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}
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nsRefPtr<MediaStreamTrack> track;
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if (mEvents & MediaStreamListener::TRACK_EVENT_CREATED) {
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track = stream->CreateDOMTrack(mID, mType);
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} else {
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track = stream->GetDOMTrackFor(mID);
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}
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if (mEvents & MediaStreamListener::TRACK_EVENT_ENDED) {
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track->NotifyEnded();
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}
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return NS_OK;
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}
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StreamTime mEndTime;
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nsRefPtr<StreamListener> mListener;
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TrackID mID;
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uint32_t mEvents;
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MediaSegment::Type mType;
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};
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/**
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* Notify that changes to one of the stream tracks have been queued.
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* aTrackEvents can be any combination of TRACK_EVENT_CREATED and
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* TRACK_EVENT_ENDED. aQueuedMedia is the data being added to the track
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* at aTrackOffset (relative to the start of the stream).
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* aQueuedMedia can be null if there is no output.
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*/
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virtual void NotifyQueuedTrackChanges(MediaStreamGraph* aGraph, TrackID aID,
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TrackRate aTrackRate,
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TrackTicks aTrackOffset,
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uint32_t aTrackEvents,
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const MediaSegment& aQueuedMedia) MOZ_OVERRIDE
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{
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if (aTrackEvents & (TRACK_EVENT_CREATED | TRACK_EVENT_ENDED)) {
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nsRefPtr<TrackChange> runnable =
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new TrackChange(this, aID, aTrackOffset, aTrackEvents,
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aQueuedMedia.GetType());
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NS_DispatchToMainThread(runnable);
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}
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}
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private:
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// These fields may only be accessed on the main thread
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DOMMediaStream* mStream;
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};
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DOMMediaStream::DOMMediaStream()
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: mLogicalStreamStartTime(0),
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mStream(nullptr), mHintContents(0), mTrackTypesAvailable(0),
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mNotifiedOfMediaStreamGraphShutdown(false)
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{
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SetIsDOMBinding();
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}
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DOMMediaStream::~DOMMediaStream()
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{
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Destroy();
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}
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void
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DOMMediaStream::Destroy()
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{
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if (mListener) {
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mListener->Forget();
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mListener = nullptr;
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}
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if (mStream) {
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mStream->Destroy();
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mStream = nullptr;
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}
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}
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JSObject*
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DOMMediaStream::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope)
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{
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return dom::MediaStreamBinding::Wrap(aCx, aScope, this);
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}
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double
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DOMMediaStream::CurrentTime()
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{
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if (!mStream) {
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return 0.0;
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}
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return MediaTimeToSeconds(mStream->GetCurrentTime() - mLogicalStreamStartTime);
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}
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void
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DOMMediaStream::GetAudioTracks(nsTArray<nsRefPtr<AudioStreamTrack> >& aTracks)
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{
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for (uint32_t i = 0; i < mTracks.Length(); ++i) {
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AudioStreamTrack* t = mTracks[i]->AsAudioStreamTrack();
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if (t) {
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aTracks.AppendElement(t);
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}
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}
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}
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void
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DOMMediaStream::GetVideoTracks(nsTArray<nsRefPtr<VideoStreamTrack> >& aTracks)
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{
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for (uint32_t i = 0; i < mTracks.Length(); ++i) {
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VideoStreamTrack* t = mTracks[i]->AsVideoStreamTrack();
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if (t) {
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aTracks.AppendElement(t);
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}
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}
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}
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bool
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DOMMediaStream::IsFinished()
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{
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return !mStream || mStream->IsFinished();
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}
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void
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DOMMediaStream::InitSourceStream(nsIDOMWindow* aWindow, TrackTypeHints aHintContents)
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{
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mWindow = aWindow;
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SetHintContents(aHintContents);
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MediaStreamGraph* gm = MediaStreamGraph::GetInstance();
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InitStreamCommon(gm->CreateSourceStream(this));
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}
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void
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DOMMediaStream::InitTrackUnionStream(nsIDOMWindow* aWindow, TrackTypeHints aHintContents)
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{
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mWindow = aWindow;
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SetHintContents(aHintContents);
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MediaStreamGraph* gm = MediaStreamGraph::GetInstance();
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InitStreamCommon(gm->CreateTrackUnionStream(this));
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}
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void
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DOMMediaStream::InitStreamCommon(MediaStream* aStream)
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{
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mStream = aStream;
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// Setup track listener
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mListener = new StreamListener(this);
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aStream->AddListener(mListener);
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}
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already_AddRefed<DOMMediaStream>
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DOMMediaStream::CreateSourceStream(nsIDOMWindow* aWindow, TrackTypeHints aHintContents)
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{
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nsRefPtr<DOMMediaStream> stream = new DOMMediaStream();
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stream->InitSourceStream(aWindow, aHintContents);
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return stream.forget();
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}
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already_AddRefed<DOMMediaStream>
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DOMMediaStream::CreateTrackUnionStream(nsIDOMWindow* aWindow, TrackTypeHints aHintContents)
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{
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nsRefPtr<DOMMediaStream> stream = new DOMMediaStream();
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stream->InitTrackUnionStream(aWindow, aHintContents);
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return stream.forget();
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}
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void
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DOMMediaStream::SetTrackEnabled(TrackID aTrackID, bool aEnabled)
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{
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if (mStream) {
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mStream->SetTrackEnabled(aTrackID, aEnabled);
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}
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}
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bool
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DOMMediaStream::CombineWithPrincipal(nsIPrincipal* aPrincipal)
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{
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return nsContentUtils::CombineResourcePrincipals(&mPrincipal, aPrincipal);
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}
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MediaStreamTrack*
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DOMMediaStream::CreateDOMTrack(TrackID aTrackID, MediaSegment::Type aType)
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{
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MediaStreamTrack* track;
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switch (aType) {
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case MediaSegment::AUDIO:
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track = new AudioStreamTrack(this, aTrackID);
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mTrackTypesAvailable |= HINT_CONTENTS_AUDIO;
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break;
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case MediaSegment::VIDEO:
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track = new VideoStreamTrack(this, aTrackID);
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mTrackTypesAvailable |= HINT_CONTENTS_VIDEO;
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break;
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default:
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MOZ_CRASH("Unhandled track type");
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}
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mTracks.AppendElement(track);
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CheckTracksAvailable();
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return track;
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}
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MediaStreamTrack*
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DOMMediaStream::GetDOMTrackFor(TrackID aTrackID)
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{
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for (uint32_t i = 0; i < mTracks.Length(); ++i) {
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MediaStreamTrack* t = mTracks[i];
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// We may add streams to our track list that are actually owned by
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// a different DOMMediaStream. Ignore those.
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if (t->GetTrackID() == aTrackID && t->GetStream() == this) {
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return t;
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}
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}
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return nullptr;
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}
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void
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DOMMediaStream::NotifyMediaStreamGraphShutdown()
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{
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// No more tracks will ever be added, so just clear these callbacks now
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// to prevent leaks.
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mNotifiedOfMediaStreamGraphShutdown = true;
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mRunOnTracksAvailable.Clear();
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mConsumersToKeepAlive.Clear();
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}
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void
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DOMMediaStream::NotifyStreamStateChanged()
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{
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if (IsFinished()) {
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mConsumersToKeepAlive.Clear();
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}
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}
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void
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DOMMediaStream::OnTracksAvailable(OnTracksAvailableCallback* aRunnable)
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{
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if (mNotifiedOfMediaStreamGraphShutdown) {
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// No more tracks will ever be added, so just delete the callback now.
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delete aRunnable;
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return;
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}
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mRunOnTracksAvailable.AppendElement(aRunnable);
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CheckTracksAvailable();
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}
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void
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DOMMediaStream::CheckTracksAvailable()
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{
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if (mTrackTypesAvailable == 0) {
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return;
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}
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nsTArray<nsAutoPtr<OnTracksAvailableCallback> > callbacks;
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callbacks.SwapElements(mRunOnTracksAvailable);
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for (uint32_t i = 0; i < callbacks.Length(); ++i) {
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OnTracksAvailableCallback* cb = callbacks[i];
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if (~mTrackTypesAvailable & cb->GetExpectedTracks()) {
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// Some expected tracks not available yet. Try this callback again later.
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*mRunOnTracksAvailable.AppendElement() = callbacks[i].forget();
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continue;
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}
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cb->NotifyTracksAvailable(this);
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}
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}
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DOMLocalMediaStream::~DOMLocalMediaStream()
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{
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if (mStream) {
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// Make sure Listeners of this stream know it's going away
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Stop();
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}
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}
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JSObject*
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DOMLocalMediaStream::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope)
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{
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return dom::LocalMediaStreamBinding::Wrap(aCx, aScope, this);
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}
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void
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DOMLocalMediaStream::Stop()
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{
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if (mStream && mStream->AsSourceStream()) {
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mStream->AsSourceStream()->EndAllTrackAndFinish();
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}
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}
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already_AddRefed<DOMLocalMediaStream>
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DOMLocalMediaStream::CreateSourceStream(nsIDOMWindow* aWindow,
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TrackTypeHints aHintContents)
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{
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nsRefPtr<DOMLocalMediaStream> stream = new DOMLocalMediaStream();
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stream->InitSourceStream(aWindow, aHintContents);
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return stream.forget();
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}
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already_AddRefed<DOMLocalMediaStream>
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DOMLocalMediaStream::CreateTrackUnionStream(nsIDOMWindow* aWindow,
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TrackTypeHints aHintContents)
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{
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nsRefPtr<DOMLocalMediaStream> stream = new DOMLocalMediaStream();
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stream->InitTrackUnionStream(aWindow, aHintContents);
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return stream.forget();
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}
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DOMAudioNodeMediaStream::DOMAudioNodeMediaStream(AudioNode* aNode)
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: mStreamNode(aNode)
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{
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}
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already_AddRefed<DOMAudioNodeMediaStream>
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DOMAudioNodeMediaStream::CreateTrackUnionStream(nsIDOMWindow* aWindow,
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AudioNode* aNode,
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TrackTypeHints aHintContents)
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{
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nsRefPtr<DOMAudioNodeMediaStream> stream = new DOMAudioNodeMediaStream(aNode);
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stream->InitTrackUnionStream(aWindow, aHintContents);
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return stream.forget();
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}
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