Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 278 insertions, 0 deletions

diff --git a/dom/media/webaudio/MediaStreamAudioSourceNode.cpp b/dom/media/webaudio/MediaStreamAudioSourceNode.cpp
new file mode 100644
index 0000000000..a915e78859
--- /dev/null
+++ b/dom/media/webaudio/MediaStreamAudioSourceNode.cpp
@@ -0,0 +1,278 @@
+/* -*- 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 "MediaStreamAudioSourceNode.h"
+#include "mozilla/dom/MediaStreamAudioSourceNodeBinding.h"
+#include "AudioNodeEngine.h"
+#include "AudioNodeExternalInputTrack.h"
+#include "AudioStreamTrack.h"
+#include "mozilla/dom/Document.h"
+#include "nsContentUtils.h"
+#include "nsIScriptError.h"
+#include "nsID.h"
+#include "Tracing.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(MediaStreamAudioSourceNode)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(MediaStreamAudioSourceNode)
+  tmp->Destroy();
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mInputStream)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mInputTrack)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(AudioNode)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MediaStreamAudioSourceNode,
+                                                  AudioNode)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mInputStream)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mInputTrack)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaStreamAudioSourceNode)
+NS_INTERFACE_MAP_END_INHERITING(AudioNode)
+
+NS_IMPL_ADDREF_INHERITED(MediaStreamAudioSourceNode, AudioNode)
+NS_IMPL_RELEASE_INHERITED(MediaStreamAudioSourceNode, AudioNode)
+
+MediaStreamAudioSourceNode::MediaStreamAudioSourceNode(
+    AudioContext* aContext, TrackChangeBehavior aBehavior)
+    : AudioNode(aContext, 2, ChannelCountMode::Max,
+                ChannelInterpretation::Speakers),
+      mBehavior(aBehavior) {}
+
+/* static */
+already_AddRefed<MediaStreamAudioSourceNode> MediaStreamAudioSourceNode::Create(
+    AudioContext& aAudioContext, const MediaStreamAudioSourceOptions& 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<MediaStreamAudioSourceNode> node =
+      new MediaStreamAudioSourceNode(&aAudioContext, LockOnTrackPicked);
+
+  // aOptions.mMediaStream is not nullable.
+  node->Init(*aOptions.mMediaStream, aRv);
+  if (aRv.Failed()) {
+    return nullptr;
+  }
+
+  return node.forget();
+}
+
+void MediaStreamAudioSourceNode::Init(DOMMediaStream& aMediaStream,
+                                      ErrorResult& aRv) {
+  mInputStream = &aMediaStream;
+  AudioNodeEngine* engine = new MediaStreamAudioSourceNodeEngine(this);
+  mTrack = AudioNodeExternalInputTrack::Create(Context()->Graph(), engine);
+  mInputStream->AddConsumerToKeepAlive(ToSupports(this));
+
+  mInputStream->RegisterTrackListener(this);
+  if (mInputStream->Audible()) {
+    NotifyAudible();
+  }
+  AttachToRightTrack(mInputStream, aRv);
+}
+
+void MediaStreamAudioSourceNode::Destroy() {
+  if (mInputStream) {
+    mInputStream->UnregisterTrackListener(this);
+    mInputStream = nullptr;
+  }
+  DetachFromTrack();
+}
+
+MediaStreamAudioSourceNode::~MediaStreamAudioSourceNode() { Destroy(); }
+
+void MediaStreamAudioSourceNode::AttachToTrack(
+    const RefPtr<MediaStreamTrack>& aTrack, ErrorResult& aRv) {
+  MOZ_ASSERT(!mInputTrack);
+  MOZ_ASSERT(aTrack->AsAudioStreamTrack());
+  MOZ_DIAGNOSTIC_ASSERT(!aTrack->Ended());
+
+  if (!mTrack) {
+    return;
+  }
+
+  if (NS_WARN_IF(Context()->Graph() != aTrack->Graph())) {
+    nsCOMPtr<nsPIDOMWindowInner> pWindow = Context()->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;
+  }
+
+  mInputTrack = aTrack;
+  ProcessedMediaTrack* outputTrack =
+      static_cast<ProcessedMediaTrack*>(mTrack.get());
+  mInputPort = mInputTrack->ForwardTrackContentsTo(outputTrack);
+  PrincipalChanged(mInputTrack);  // trigger enabling/disabling of the connector
+  mInputTrack->AddPrincipalChangeObserver(this);
+  MarkActive();
+}
+
+void MediaStreamAudioSourceNode::DetachFromTrack() {
+  if (mInputTrack) {
+    mInputTrack->RemovePrincipalChangeObserver(this);
+    mInputTrack = nullptr;
+  }
+  if (mInputPort) {
+    mInputPort->Destroy();
+    mInputPort = nullptr;
+  }
+}
+
+static int AudioTrackCompare(const RefPtr<AudioStreamTrack>& aLhs,
+                             const RefPtr<AudioStreamTrack>& aRhs) {
+  nsAutoStringN<NSID_LENGTH> IDLhs;
+  nsAutoStringN<NSID_LENGTH> IDRhs;
+  aLhs->GetId(IDLhs);
+  aRhs->GetId(IDRhs);
+  return Compare(NS_ConvertUTF16toUTF8(IDLhs), NS_ConvertUTF16toUTF8(IDRhs));
+}
+
+void MediaStreamAudioSourceNode::AttachToRightTrack(
+    const RefPtr<DOMMediaStream>& aMediaStream, ErrorResult& aRv) {
+  nsTArray<RefPtr<AudioStreamTrack>> tracks;
+  aMediaStream->GetAudioTracks(tracks);
+
+  if (tracks.IsEmpty() && mBehavior == LockOnTrackPicked) {
+    aRv.ThrowInvalidStateError("No audio tracks in MediaStream");
+    return;
+  }
+
+  // Sort the track to have a stable order, on their ID by lexicographic
+  // ordering on sequences of code unit values.
+  tracks.Sort(AudioTrackCompare);
+
+  for (const RefPtr<AudioStreamTrack>& track : tracks) {
+    if (mBehavior == FollowChanges) {
+      if (track->Ended()) {
+        continue;
+      }
+    }
+
+    if (!track->Ended()) {
+      AttachToTrack(track, aRv);
+    }
+    return;
+  }
+
+  // There was no track available. We'll allow the node to be garbage collected.
+  MarkInactive();
+}
+
+void MediaStreamAudioSourceNode::NotifyTrackAdded(
+    const RefPtr<MediaStreamTrack>& aTrack) {
+  if (mBehavior != FollowChanges) {
+    return;
+  }
+  if (mInputTrack) {
+    return;
+  }
+
+  if (!aTrack->AsAudioStreamTrack()) {
+    return;
+  }
+
+  AttachToTrack(aTrack, IgnoreErrors());
+}
+
+void MediaStreamAudioSourceNode::NotifyTrackRemoved(
+    const RefPtr<MediaStreamTrack>& aTrack) {
+  if (mBehavior == FollowChanges) {
+    if (aTrack != mInputTrack) {
+      return;
+    }
+
+    DetachFromTrack();
+    AttachToRightTrack(mInputStream, IgnoreErrors());
+  }
+}
+
+void MediaStreamAudioSourceNode::NotifyAudible() {
+  MOZ_ASSERT(mInputStream);
+  Context()->StartBlockedAudioContextIfAllowed();
+}
+
+/**
+ * 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 stream, then
+ * there needs to be other measures in place to ensure that any media that is
+ * governed by the new stream 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 MediaStreamAudioSourceNode::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(MediaStreamAudioSourceNodeEngine::ENABLE, enabled);
+
+  if (!enabled && doc) {
+    nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, "Web Audio"_ns,
+                                    doc, nsContentUtils::eDOM_PROPERTIES,
+                                    CrossOriginErrorString());
+  }
+}
+
+size_t MediaStreamAudioSourceNode::SizeOfExcludingThis(
+    MallocSizeOf aMallocSizeOf) const {
+  // Future:
+  // - mInputStream
+  size_t amount = AudioNode::SizeOfExcludingThis(aMallocSizeOf);
+  if (mInputPort) {
+    amount += mInputPort->SizeOfIncludingThis(aMallocSizeOf);
+  }
+  return amount;
+}
+
+size_t MediaStreamAudioSourceNode::SizeOfIncludingThis(
+    MallocSizeOf aMallocSizeOf) const {
+  return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}
+
+void MediaStreamAudioSourceNode::DestroyMediaTrack() {
+  if (mInputPort) {
+    mInputPort->Destroy();
+    mInputPort = nullptr;
+  }
+  AudioNode::DestroyMediaTrack();
+}
+
+JSObject* MediaStreamAudioSourceNode::WrapObject(
+    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
+  return MediaStreamAudioSourceNode_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+}  // namespace mozilla::dom