1 files changed, 68 insertions, 0 deletions
diff --git a/dom/media/ForwardedInputTrack.h b/dom/media/ForwardedInputTrack.h
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+++ b/dom/media/ForwardedInputTrack.h
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+/* -*- 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 MOZILLA_FORWARDEDINPUTTRACK_H_
+#define MOZILLA_FORWARDEDINPUTTRACK_H_
+
+#include "MediaTrackGraph.h"
+#include "MediaTrackListener.h"
+#include <algorithm>
+
+namespace mozilla {
+
+/**
+ * See MediaTrackGraph::CreateForwardedInputTrack.
+ */
+class ForwardedInputTrack : public ProcessedMediaTrack {
+ public:
+  ForwardedInputTrack(TrackRate aSampleRate, MediaSegment::Type aType);
+
+  virtual ForwardedInputTrack* AsForwardedInputTrack() override { return this; }
+  friend class DOMMediaStream;
+
+  void AddInput(MediaInputPort* aPort) override;
+  void RemoveInput(MediaInputPort* aPort) override;
+  void ProcessInput(GraphTime aFrom, GraphTime aTo, uint32_t aFlags) override;
+
+  DisabledTrackMode CombinedDisabledMode() const override;
+  void SetDisabledTrackModeImpl(DisabledTrackMode aMode) override;
+  void OnInputDisabledModeChanged(DisabledTrackMode aInputMode) override;
+
+  uint32_t NumberOfChannels() const override;
+
+  friend class MediaTrackGraphImpl;
+
+ protected:
+  // Set up this track from a specific input.
+  void SetInput(MediaInputPort* aPort);
+
+  // MediaSegment-agnostic ProcessInput.
+  void ProcessInputImpl(MediaTrack* aSource, MediaSegment* aSegment,
+                        GraphTime aFrom, GraphTime aTo, uint32_t aFlags);
+
+  void AddDirectListenerImpl(
+      already_AddRefed<DirectMediaTrackListener> aListener) override;
+  void RemoveDirectListenerImpl(DirectMediaTrackListener* aListener) override;
+  void RemoveAllDirectListenersImpl() override;
+
+  // These are direct track listeners that have been added to this
+  // ForwardedInputTrack-track. While an input is set, these are forwarded to
+  // the input track. We will update these when this track's disabled status
+  // changes.
+  nsTArray<RefPtr<DirectMediaTrackListener>> mOwnedDirectListeners;
+
+  // Set if an input has been added, nullptr otherwise. Adding more than one
+  // input is an error.
+  MediaInputPort* mInputPort = nullptr;
+
+  // This track's input's associated disabled mode. ENABLED if there is no
+  // input. This is used with MediaTrackListener::NotifyEnabledStateChanged(),
+  // which affects only video tracks. This is set only on ForwardedInputTracks.
+  DisabledTrackMode mInputDisabledMode = DisabledTrackMode::ENABLED;
+};
+
+}  // namespace mozilla
+
+#endif /* MOZILLA_FORWARDEDINPUTTRACK_H_ */