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7fc0ce825d
This prevents HTMLMediaElements from being prematurely cycle-collected, and also makes things a bit safer. Differential Revision: https://phabricator.services.mozilla.com/D205734
81 lines
2.5 KiB
C++
81 lines
2.5 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 "MediaStreamWindowCapturer.h"
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#include "AudioStreamTrack.h"
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#include "DOMMediaStream.h"
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#include "MediaTrackGraph.h"
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namespace mozilla {
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using dom::AudioStreamTrack;
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using dom::MediaStreamTrack;
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NS_IMPL_CYCLE_COLLECTION_INHERITED(MediaStreamWindowCapturer,
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DOMMediaStream::TrackListener)
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NS_IMPL_ADDREF_INHERITED(MediaStreamWindowCapturer,
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DOMMediaStream::TrackListener)
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NS_IMPL_RELEASE_INHERITED(MediaStreamWindowCapturer,
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DOMMediaStream::TrackListener)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaStreamWindowCapturer)
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NS_INTERFACE_MAP_END_INHERITING(DOMMediaStream::TrackListener)
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MediaStreamWindowCapturer::CapturedTrack::CapturedTrack(
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MediaStreamTrack* aTrack, uint64_t aWindowID)
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: mTrack(aTrack),
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mPort(aTrack->Graph()->ConnectToCaptureTrack(aWindowID,
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aTrack->GetTrack())) {}
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MediaStreamWindowCapturer::CapturedTrack::~CapturedTrack() {
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if (mPort) {
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mPort->Destroy();
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}
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}
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MediaStreamWindowCapturer::MediaStreamWindowCapturer(DOMMediaStream* aStream,
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uint64_t aWindowId)
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: mStream(aStream), mWindowId(aWindowId) {
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nsTArray<RefPtr<AudioStreamTrack>> tracks;
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mStream->GetAudioTracks(tracks);
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for (const auto& t : tracks) {
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if (t->Ended()) {
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continue;
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}
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AddTrack(t);
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}
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}
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MediaStreamWindowCapturer::~MediaStreamWindowCapturer() = default;
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void MediaStreamWindowCapturer::NotifyTrackAdded(
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const RefPtr<MediaStreamTrack>& aTrack) {
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if (AudioStreamTrack* at = aTrack->AsAudioStreamTrack()) {
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AddTrack(at);
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}
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}
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void MediaStreamWindowCapturer::NotifyTrackRemoved(
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const RefPtr<MediaStreamTrack>& aTrack) {
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if (AudioStreamTrack* at = aTrack->AsAudioStreamTrack()) {
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RemoveTrack(at);
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}
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}
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void MediaStreamWindowCapturer::AddTrack(AudioStreamTrack* aTrack) {
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if (aTrack->Ended()) {
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return;
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}
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mTracks.AppendElement(MakeUnique<CapturedTrack>(aTrack, mWindowId));
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}
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void MediaStreamWindowCapturer::RemoveTrack(AudioStreamTrack* aTrack) {
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for (size_t i = mTracks.Length(); i > 0; --i) {
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if (mTracks[i - 1]->mTrack == aTrack) {
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mTracks.RemoveElementAt(i - 1);
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break;
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}
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}
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}
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} // namespace mozilla
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