зеркало из https://github.com/mozilla/gecko-dev.git
108 строки
3.6 KiB
C++
108 строки
3.6 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 sts=2 et cindent: */
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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 "MediaElementAudioSourceNode.h"
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#include "mozilla/dom/MediaElementAudioSourceNodeBinding.h"
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#include "AudioDestinationNode.h"
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#include "AudioNodeTrack.h"
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#include "MediaStreamTrack.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_CLASS(MediaElementAudioSourceNode)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(MediaElementAudioSourceNode)
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tmp->Destroy();
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mElement)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(AudioNode)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MediaElementAudioSourceNode,
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MediaStreamAudioSourceNode)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaElementAudioSourceNode)
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NS_INTERFACE_MAP_END_INHERITING(MediaStreamAudioSourceNode)
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NS_IMPL_ADDREF_INHERITED(MediaElementAudioSourceNode,
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MediaStreamAudioSourceNode)
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NS_IMPL_RELEASE_INHERITED(MediaElementAudioSourceNode,
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MediaStreamAudioSourceNode)
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MediaElementAudioSourceNode::MediaElementAudioSourceNode(
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AudioContext* aContext, HTMLMediaElement* aElement)
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: MediaStreamAudioSourceNode(aContext, TrackChangeBehavior::FollowChanges),
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mElement(aElement) {
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MOZ_ASSERT(aElement);
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}
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/* static */
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already_AddRefed<MediaElementAudioSourceNode>
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MediaElementAudioSourceNode::Create(
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AudioContext& aAudioContext, const MediaElementAudioSourceOptions& aOptions,
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ErrorResult& aRv) {
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if (aAudioContext.IsOffline()) {
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aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
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return nullptr;
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}
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RefPtr<MediaElementAudioSourceNode> node =
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new MediaElementAudioSourceNode(&aAudioContext, aOptions.mMediaElement);
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RefPtr<DOMMediaStream> stream = aOptions.mMediaElement->CaptureAudio(
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aRv, aAudioContext.Destination()->Track()->Graph());
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if (aRv.Failed()) {
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return nullptr;
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}
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node->Init(stream, aRv);
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if (aRv.Failed()) {
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return nullptr;
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}
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node->ListenForAllowedToPlay(aOptions);
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return node.forget();
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}
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JSObject* MediaElementAudioSourceNode::WrapObject(
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JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
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return MediaElementAudioSourceNode_Binding::Wrap(aCx, this, aGivenProto);
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}
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void MediaElementAudioSourceNode::ListenForAllowedToPlay(
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const MediaElementAudioSourceOptions& aOptions) {
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if (!GetAbstractMainThread()) {
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// The AudioContext must have been closed. It won't be able to start anyway.
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return;
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}
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aOptions.mMediaElement->GetAllowedToPlayPromise()
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->Then(
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GetAbstractMainThread(), __func__,
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// Capture by reference to bypass the mozilla-refcounted-inside-lambda
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// static analysis. We capture a non-owning reference so as to allow
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// cycle collection of the node. The reference is cleared via
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// DisconnectIfExists() from Destroy() when the node is collected.
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[& self = *this]() {
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self.Context()->StartBlockedAudioContextIfAllowed();
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self.mAllowedToPlayRequest.Complete();
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})
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->Track(mAllowedToPlayRequest);
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}
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void MediaElementAudioSourceNode::Destroy() {
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mAllowedToPlayRequest.DisconnectIfExists();
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MediaStreamAudioSourceNode::Destroy();
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}
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HTMLMediaElement* MediaElementAudioSourceNode::MediaElement() {
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return mElement;
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}
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} // namespace dom
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} // namespace mozilla
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