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MediaStreamTrackAudioSourceNode.h (3474B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef MediaStreamTrackAudioSourceNode_h_
      8 #define MediaStreamTrackAudioSourceNode_h_
      9 
     10 #include "AudioNode.h"
     11 #include "AudioNodeEngine.h"
     12 #include "PrincipalChangeObserver.h"
     13 #include "mozilla/WeakPtr.h"
     14 #include "mozilla/dom/MediaStreamTrack.h"
     15 
     16 namespace mozilla::dom {
     17 
     18 class AudioContext;
     19 struct MediaStreamTrackAudioSourceOptions;
     20 
     21 class MediaStreamTrackAudioSourceNodeEngine final : public AudioNodeEngine {
     22 public:
     23  explicit MediaStreamTrackAudioSourceNodeEngine(AudioNode* aNode)
     24      : AudioNodeEngine(aNode), mEnabled(false) {}
     25 
     26  bool IsEnabled() const { return mEnabled; }
     27  enum Parameters { ENABLE };
     28  void SetInt32Parameter(uint32_t aIndex, int32_t aValue) override {
     29    switch (aIndex) {
     30      case ENABLE:
     31        mEnabled = !!aValue;
     32        break;
     33      default:
     34        NS_ERROR("MediaStreamTrackAudioSourceNodeEngine bad parameter index");
     35    }
     36  }
     37 
     38 private:
     39  bool mEnabled;
     40 };
     41 
     42 class MediaStreamTrackAudioSourceNode
     43    : public AudioNode,
     44      public PrincipalChangeObserver<MediaStreamTrack>,
     45      public SupportsWeakPtr {
     46 public:
     47  static already_AddRefed<MediaStreamTrackAudioSourceNode> Create(
     48      AudioContext& aContext,
     49      const MediaStreamTrackAudioSourceOptions& aOptions, ErrorResult& aRv);
     50 
     51  NS_DECL_ISUPPORTS_INHERITED
     52  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MediaStreamTrackAudioSourceNode,
     53                                           AudioNode)
     54 
     55  static already_AddRefed<MediaStreamTrackAudioSourceNode> Constructor(
     56      const GlobalObject& aGlobal, AudioContext& aAudioContext,
     57      const MediaStreamTrackAudioSourceOptions& aOptions, ErrorResult& aRv) {
     58    return Create(aAudioContext, aOptions, aRv);
     59  }
     60 
     61  JSObject* WrapObject(JSContext* aCx,
     62                       JS::Handle<JSObject*> aGivenProto) override;
     63 
     64  void DestroyMediaTrack() override;
     65 
     66  uint16_t NumberOfInputs() const override { return 0; }
     67 
     68  const char* NodeType() const override {
     69    return "MediaStreamTrackAudioSourceNode";
     70  }
     71 
     72  virtual const char* CrossOriginErrorString() const {
     73    return "MediaStreamTrackAudioSourceNodeCrossOrigin";
     74  }
     75 
     76  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
     77  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
     78 
     79  // From PrincipalChangeObserver<MediaStreamTrack>.
     80  void PrincipalChanged(MediaStreamTrack* aMediaStreamTrack) override;
     81 
     82 protected:
     83  explicit MediaStreamTrackAudioSourceNode(AudioContext* aContext);
     84  void Init(MediaStreamTrack* aMediaStreamTrack, ErrorResult& aRv);
     85  void Destroy();
     86  virtual ~MediaStreamTrackAudioSourceNode();
     87 
     88  class TrackListener : public MediaStreamTrackConsumer {
     89   public:
     90    explicit TrackListener(MediaStreamTrackAudioSourceNode* aNode)
     91        : mNode(aNode) {}
     92 
     93    void NotifyEnded(MediaStreamTrack* aTrack) override {
     94      if (mNode) {
     95        mNode->MarkInactive();
     96        mNode->DestroyMediaTrack();
     97        mNode = nullptr;
     98      }
     99    }
    100 
    101   private:
    102    WeakPtr<MediaStreamTrackAudioSourceNode> mNode;
    103  };
    104 
    105 private:
    106  RefPtr<MediaInputPort> mInputPort;
    107  RefPtr<MediaStreamTrack> mInputTrack;
    108  TrackListener mTrackListener;
    109 };
    110 
    111 }  // namespace mozilla::dom
    112 
    113 #endif