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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MediaElementAudioSourceNode.h"
#include "mozilla/dom/MediaElementAudioSourceNodeBinding.h"
#include "AudioDestinationNode.h"
#include "AudioNodeTrack.h"
#include "MediaStreamTrack.h"
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(MediaElementAudioSourceNode)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(MediaElementAudioSourceNode)
tmp->Destroy();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mElement)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(AudioNode)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MediaElementAudioSourceNode,
MediaStreamAudioSourceNode)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaElementAudioSourceNode)
NS_INTERFACE_MAP_END_INHERITING(MediaStreamAudioSourceNode)
NS_IMPL_ADDREF_INHERITED(MediaElementAudioSourceNode,
MediaStreamAudioSourceNode)
NS_IMPL_RELEASE_INHERITED(MediaElementAudioSourceNode,
MediaStreamAudioSourceNode)
MediaElementAudioSourceNode::MediaElementAudioSourceNode(
AudioContext* aContext, HTMLMediaElement* aElement)
: MediaStreamAudioSourceNode(aContext, TrackChangeBehavior::FollowChanges),
mElement(aElement) {
MOZ_ASSERT(aElement);
}
/* static */
already_AddRefed<MediaElementAudioSourceNode>
MediaElementAudioSourceNode::Create(
AudioContext& aAudioContext, const MediaElementAudioSourceOptions& aOptions,
ErrorResult& aRv) {
// The spec has a pointless check here. See
// https://github.com/WebAudio/web-audio-api/issues/2149
MOZ_RELEASE_ASSERT(!aAudioContext.IsOffline(), "Bindings messed up?");
RefPtr<MediaElementAudioSourceNode> node =
new MediaElementAudioSourceNode(&aAudioContext, aOptions.mMediaElement);
RefPtr<DOMMediaStream> stream = aOptions.mMediaElement->CaptureAudio(
aRv, aAudioContext.Destination()->Track()->Graph());
if (aRv.Failed()) {
return nullptr;
}
MOZ_ASSERT(stream, "CaptureAudio should report failure via aRv!");
node->Init(*stream, aRv);
if (aRv.Failed()) {
return nullptr;
}
node->ListenForAllowedToPlay(aOptions);
return node.forget();
}
JSObject* MediaElementAudioSourceNode::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return MediaElementAudioSourceNode_Binding::Wrap(aCx, this, aGivenProto);
}
void MediaElementAudioSourceNode::ListenForAllowedToPlay(
const MediaElementAudioSourceOptions& aOptions) {
if (!GetAbstractMainThread()) {
// The AudioContext must have been closed. It won't be able to start anyway.
return;
}
aOptions.mMediaElement->GetAllowedToPlayPromise()
->Then(
GetAbstractMainThread(), __func__,
// Capture by reference to bypass the mozilla-refcounted-inside-lambda
// static analysis. We capture a non-owning reference so as to allow
// cycle collection of the node. The reference is cleared via
// DisconnectIfExists() from Destroy() when the node is collected.
[&self = *this]() {
self.Context()->StartBlockedAudioContextIfAllowed();
self.mAllowedToPlayRequest.Complete();
})
->Track(mAllowedToPlayRequest);
}
void MediaElementAudioSourceNode::Destroy() {
mAllowedToPlayRequest.DisconnectIfExists();
MediaStreamAudioSourceNode::Destroy();
}
HTMLMediaElement* MediaElementAudioSourceNode::MediaElement() {
return mElement;
}
} // namespace mozilla::dom
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