dom/media/ForwardedInputTrack.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   4  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef MOZILLA_FORWARDEDINPUTTRACK_H_
   7 #define MOZILLA_FORWARDEDINPUTTRACK_H_
   8
   9 #include "MediaTrackGraph.h"
  10 #include "MediaTrackListener.h"
  11 #include <algorithm>
  12
  13 namespace mozilla {
  14
  15 /**
  16  * See MediaTrackGraph::CreateForwardedInputTrack.
  17  */
  18 class ForwardedInputTrack : public ProcessedMediaTrack {
  19  public:
  20   ForwardedInputTrack(TrackRate aSampleRate, MediaSegment::Type aType);
  21
  22   virtual ForwardedInputTrack* AsForwardedInputTrack() override { return this; }
  23   friend class DOMMediaStream;
  24
  25   void AddInput(MediaInputPort* aPort) override;
  26   void RemoveInput(MediaInputPort* aPort) override;
  27   void ProcessInput(GraphTime aFrom, GraphTime aTo, uint32_t aFlags) override;
  28
  29   DisabledTrackMode CombinedDisabledMode() const override;
  30   void SetDisabledTrackModeImpl(DisabledTrackMode aMode) override;
  31   void OnInputDisabledModeChanged(DisabledTrackMode aInputMode) override;
  32
  33   uint32_t NumberOfChannels() const override;
  34
  35   friend class MediaTrackGraphImpl;
  36
  37  protected:
  38   // Set up this track from a specific input.
  39   void SetInput(MediaInputPort* aPort);
  40
  41   // MediaSegment-agnostic ProcessInput.
  42   void ProcessInputImpl(MediaTrack* aSource, MediaSegment* aSegment,
  43                         GraphTime aFrom, GraphTime aTo, uint32_t aFlags);
  44
  45   void AddDirectListenerImpl(
  46       already_AddRefed<DirectMediaTrackListener> aListener) override;
  47   void RemoveDirectListenerImpl(DirectMediaTrackListener* aListener) override;
  48   void RemoveAllDirectListenersImpl() override;
  49
  50   // These are direct track listeners that have been added to this
  51   // ForwardedInputTrack-track. While an input is set, these are forwarded to
  52   // the input track. We will update these when this track's disabled status
  53   // changes.
  54   nsTArray<RefPtr<DirectMediaTrackListener>> mOwnedDirectListeners;
  55
  56   // Set if an input has been added, nullptr otherwise. Adding more than one
  57   // input is an error.
  58   MediaInputPort* mInputPort = nullptr;
  59
  60   // This track's input's associated disabled mode. ENABLED if there is no
  61   // input. This is used with MediaTrackListener::NotifyEnabledStateChanged(),
  62   // which affects only video tracks. This is set only on ForwardedInputTracks.
  63   DisabledTrackMode mInputDisabledMode = DisabledTrackMode::ENABLED;
  64 };
  65
  66 }  // namespace mozilla
  67
  68 #endif /* MOZILLA_FORWARDEDINPUTTRACK_H_ */