1 files changed, 56 insertions, 0 deletions
diff --git a/dom/media/AudioStreamTrack.h b/dom/media/AudioStreamTrack.h
new file mode 100644
index 0000000000..2bd8b18108
--- /dev/null
+++ b/dom/media/AudioStreamTrack.h
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
+/* 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/. */
+
+#ifndef AUDIOSTREAMTRACK_H_
+#define AUDIOSTREAMTRACK_H_
+
+#include "MediaStreamTrack.h"
+#include "DOMMediaStream.h"
+#include "CrossGraphPort.h"
+#include "nsClassHashtable.h"
+
+namespace mozilla::dom {
+
+class AudioStreamTrack : public MediaStreamTrack {
+ public:
+  AudioStreamTrack(
+      nsPIDOMWindowInner* aWindow, mozilla::MediaTrack* aInputTrack,
+      MediaStreamTrackSource* aSource,
+      MediaStreamTrackState aReadyState = MediaStreamTrackState::Live,
+      bool aMuted = false,
+      const MediaTrackConstraints& aConstraints = MediaTrackConstraints())
+      : MediaStreamTrack(aWindow, aInputTrack, aSource, aReadyState, aMuted,
+                         aConstraints) {}
+
+  AudioStreamTrack* AsAudioStreamTrack() override { return this; }
+  const AudioStreamTrack* AsAudioStreamTrack() const override { return this; }
+
+  // Direct output to aSink, or the default output device if aSink is null.
+  // No more than one output may exist for a single aKey at any one time.
+  // Returns a promise that resolves immediately for the default device or
+  // when a non-default device is processing audio.
+  RefPtr<GenericPromise> AddAudioOutput(void* aKey, AudioDeviceInfo* aSink);
+  void RemoveAudioOutput(void* aKey);
+  void SetAudioOutputVolume(void* aKey, float aVolume);
+
+  // WebIDL
+  void GetKind(nsAString& aKind) override { aKind.AssignLiteral("audio"); }
+
+  void GetLabel(nsAString& aLabel, CallerType aCallerType) override;
+
+ protected:
+  already_AddRefed<MediaStreamTrack> CloneInternal() override;
+  void SetReadyState(MediaStreamTrackState aState) override;
+
+ private:
+  // Track CrossGraphPort per AudioOutput key. This is required in order to
+  // redirect all AudioOutput requests (add, remove, set volume) to the
+  // receiver track, which belongs to the remote graph. MainThread only.
+  nsClassHashtable<nsPtrHashKey<void>, CrossGraphPort> mCrossGraphs;
+};
+
+}  // namespace mozilla::dom
+
+#endif /* AUDIOSTREAMTRACK_H_ */