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4b3fa9c67e
This is inherently large, because modifying these bits of DOMMediaStream and MediaStreamTrack affects all consumers and producers of all DOMMediaStreams and MediaStreamTracks. Things are generally much simpler now. Producers of tracks now create a MediaStream in the graph, add it to a MediaStreamTrackSource subclass that takes ownership of it, and add the source to a MediaStreamTrack. Should the producer need a DOMMediaStream it is now much simpler to create as the only thing needed is the current window. The stream is a rather simple wrapper around an array of MediaStreamTracks. HTMLMediaElement is still not as straight forward as other consumers since it consumes the DOMMediaStream directly, as opposed to a set of tracks. The new MediaStreamRenderer helper class helps bridge the gap between this fact and the new track-based MediaStreamGraph interface, as it needs to juggle registering multiple audio tracks for audio output. This hooks into existing HTMLMediaElement logic and brings a welcome simplification to all the glue previously needed there. Differential Revision: https://phabricator.services.mozilla.com/D37934 --HG-- extra : moz-landing-system : lando
95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 et tw=78: */
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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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#include "mozilla/dom/HTMLMediaElement.h"
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#include "mozilla/dom/VideoStreamTrack.h"
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#include "mozilla/dom/VideoTrack.h"
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#include "mozilla/dom/VideoTrackBinding.h"
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#include "mozilla/dom/VideoTrackList.h"
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namespace mozilla {
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namespace dom {
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VideoTrack::VideoTrack(nsIGlobalObject* aOwnerGlobal, const nsAString& aId,
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const nsAString& aKind, const nsAString& aLabel,
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const nsAString& aLanguage,
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VideoStreamTrack* aStreamTrack)
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: MediaTrack(aOwnerGlobal, aId, aKind, aLabel, aLanguage),
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mSelected(false),
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mVideoStreamTrack(aStreamTrack) {}
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VideoTrack::~VideoTrack() = default;
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NS_IMPL_CYCLE_COLLECTION_INHERITED(VideoTrack, MediaTrack, mVideoStreamTrack)
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NS_IMPL_ADDREF_INHERITED(VideoTrack, MediaTrack)
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NS_IMPL_RELEASE_INHERITED(VideoTrack, MediaTrack)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(VideoTrack)
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NS_INTERFACE_MAP_END_INHERITING(MediaTrack)
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JSObject* VideoTrack::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return VideoTrack_Binding::Wrap(aCx, this, aGivenProto);
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}
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void VideoTrack::SetSelected(bool aSelected) {
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SetEnabledInternal(aSelected, MediaTrack::DEFAULT);
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}
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void VideoTrack::SetEnabledInternal(bool aEnabled, int aFlags) {
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if (aEnabled == mSelected) {
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return;
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}
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mSelected = aEnabled;
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// If this VideoTrack is no longer in its original VideoTrackList, then
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// whether it is selected or not has no effect on its original list.
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if (!mList) {
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return;
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}
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VideoTrackList& list = static_cast<VideoTrackList&>(*mList);
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if (mSelected) {
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uint32_t curIndex = 0;
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// Unselect all video tracks except the current one.
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for (uint32_t i = 0; i < list.Length(); ++i) {
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if (list[i] == this) {
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curIndex = i;
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continue;
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}
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VideoTrack* track = list[i];
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track->SetSelected(false);
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}
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// Set the index of selected video track to the current's index.
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list.mSelectedIndex = curIndex;
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HTMLMediaElement* element = mList->GetMediaElement();
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if (element) {
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element->NotifyMediaTrackEnabled(this);
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}
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} else {
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list.mSelectedIndex = -1;
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HTMLMediaElement* element = mList->GetMediaElement();
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if (element) {
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element->NotifyMediaTrackDisabled(this);
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}
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}
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// Fire the change event at selection changes on this video track, shall
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// propose a spec change later.
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if (!(aFlags & MediaTrack::FIRE_NO_EVENTS)) {
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list.CreateAndDispatchChangeEvent();
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}
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}
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} // namespace dom
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} // namespace mozilla
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