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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "MediaStreamTrackAudioSourceNode.h"
#include "mozilla/dom/MediaStreamTrackAudioSourceNodeBinding.h"
#include "AudioNodeEngine.h"
#include "AudioNodeExternalInputTrack.h"
#include "AudioStreamTrack.h"
#include "mozilla/dom/Document.h"
#include "nsContentUtils.h"
#include "nsIScriptError.h"
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(MediaStreamTrackAudioSourceNode)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(MediaStreamTrackAudioSourceNode)
tmp->Destroy();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mInputTrack)
NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_PTR
NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(AudioNode)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(
MediaStreamTrackAudioSourceNode, AudioNode)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mInputTrack)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaStreamTrackAudioSourceNode)
NS_INTERFACE_MAP_END_INHERITING(AudioNode)
NS_IMPL_ADDREF_INHERITED(MediaStreamTrackAudioSourceNode, AudioNode)
NS_IMPL_RELEASE_INHERITED(MediaStreamTrackAudioSourceNode, AudioNode)
MediaStreamTrackAudioSourceNode::MediaStreamTrackAudioSourceNode(
AudioContext* aContext)
: AudioNode(aContext, 2, ChannelCountMode::Max,
ChannelInterpretation::Speakers),
mTrackListener(this) {}
/* static */ already_AddRefed<MediaStreamTrackAudioSourceNode>
MediaStreamTrackAudioSourceNode::Create(
AudioContext& aAudioContext,
const MediaStreamTrackAudioSourceOptions& 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?");
if (!aOptions.mMediaStreamTrack->Ended() &&
aAudioContext.Graph() != aOptions.mMediaStreamTrack->Graph()) {
nsCOMPtr<nsPIDOMWindowInner> pWindow = aAudioContext.GetParentObject();
Document* document = pWindow ? pWindow->GetExtantDoc() : nullptr;
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, "Web Audio"_ns,
document, nsContentUtils::eDOM_PROPERTIES,
"MediaStreamAudioSourceNodeDifferentRate");
// This is not a spec-required exception, just a limitation of our
// implementation.
aRv.ThrowNotSupportedError(
"Connecting AudioNodes from AudioContexts with different sample-rate "
"is currently not supported.");
return nullptr;
}
RefPtr<MediaStreamTrackAudioSourceNode> node =
new MediaStreamTrackAudioSourceNode(&aAudioContext);
node->Init(aOptions.mMediaStreamTrack, aRv);
if (aRv.Failed()) {
return nullptr;
}
return node.forget();
}
void MediaStreamTrackAudioSourceNode::Init(MediaStreamTrack* aMediaStreamTrack,
ErrorResult& aRv) {
MOZ_ASSERT(aMediaStreamTrack);
if (!aMediaStreamTrack->AsAudioStreamTrack()) {
aRv.ThrowInvalidStateError("\"mediaStreamTrack\" must be an audio track");
return;
}
if (aMediaStreamTrack->Ended()) {
// The track is ended and will never produce any data. Pretend like this is
// fine.
return;
}
MarkActive();
MediaTrackGraph* graph = Context()->Graph();
AudioNodeEngine* engine = new MediaStreamTrackAudioSourceNodeEngine(this);
mTrack = AudioNodeExternalInputTrack::Create(graph, engine);
MOZ_ASSERT(mTrack);
mInputTrack = aMediaStreamTrack;
ProcessedMediaTrack* outputTrack =
static_cast<ProcessedMediaTrack*>(mTrack.get());
mInputPort = mInputTrack->ForwardTrackContentsTo(outputTrack);
PrincipalChanged(mInputTrack); // trigger enabling/disabling of the connector
mInputTrack->AddPrincipalChangeObserver(this);
mInputTrack->AddConsumer(&mTrackListener);
}
void MediaStreamTrackAudioSourceNode::Destroy() {
if (mInputTrack) {
mTrackListener.NotifyEnded(mInputTrack);
mInputTrack->RemovePrincipalChangeObserver(this);
mInputTrack->RemoveConsumer(&mTrackListener);
mInputTrack = nullptr;
}
if (mInputPort) {
mInputPort->Destroy();
mInputPort = nullptr;
}
}
MediaStreamTrackAudioSourceNode::~MediaStreamTrackAudioSourceNode() {
Destroy();
}
/**
* Changes the principal. Note that this will be called on the main thread, but
* changes will be enacted on the MediaTrackGraph thread. If the principal
* change results in the document principal losing access to the track, then
* there needs to be other measures in place to ensure that any media that is
* governed by the new track principal is not available to the MediaTrackGraph
* before this change completes. Otherwise, a site could get access to
* media that they are not authorized to receive.
*
* One solution is to block the altered content, call this method, then dispatch
* another change request to the MediaTrackGraph thread that allows the content
* under the new principal to flow. This might be unnecessary if the principal
* change is changing to be the document principal.
*/
void MediaStreamTrackAudioSourceNode::PrincipalChanged(
MediaStreamTrack* aMediaStreamTrack) {
MOZ_ASSERT(aMediaStreamTrack == mInputTrack);
bool subsumes = false;
Document* doc = nullptr;
if (nsPIDOMWindowInner* parent = Context()->GetParentObject()) {
doc = parent->GetExtantDoc();
if (doc) {
nsIPrincipal* docPrincipal = doc->NodePrincipal();
nsIPrincipal* trackPrincipal = aMediaStreamTrack->GetPrincipal();
if (!trackPrincipal ||
NS_FAILED(docPrincipal->Subsumes(trackPrincipal, &subsumes))) {
subsumes = false;
}
}
}
auto track = static_cast<AudioNodeExternalInputTrack*>(mTrack.get());
bool enabled = subsumes;
track->SetInt32Parameter(MediaStreamTrackAudioSourceNodeEngine::ENABLE,
enabled);
fprintf(stderr, "NOW: %s", enabled ? "enabled" : "disabled");
if (!enabled && doc) {
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, "Web Audio"_ns,
doc, nsContentUtils::eDOM_PROPERTIES,
CrossOriginErrorString());
}
}
size_t MediaStreamTrackAudioSourceNode::SizeOfExcludingThis(
MallocSizeOf aMallocSizeOf) const {
size_t amount = AudioNode::SizeOfExcludingThis(aMallocSizeOf);
if (mInputPort) {
amount += mInputPort->SizeOfIncludingThis(aMallocSizeOf);
}
return amount;
}
size_t MediaStreamTrackAudioSourceNode::SizeOfIncludingThis(
MallocSizeOf aMallocSizeOf) const {
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
void MediaStreamTrackAudioSourceNode::DestroyMediaTrack() {
if (mInputPort) {
mInputPort->Destroy();
mInputPort = nullptr;
}
AudioNode::DestroyMediaTrack();
}
JSObject* MediaStreamTrackAudioSourceNode::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return MediaStreamTrackAudioSourceNode_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace mozilla::dom
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