Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim:set ts=2 sw=2 sts=2 et cindent: */
       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 MediaStreamAudioSourceNode_h_
       8             : #define MediaStreamAudioSourceNode_h_
       9             : 
      10             : #include "AudioNode.h"
      11             : #include "DOMMediaStream.h"
      12             : #include "AudioNodeEngine.h"
      13             : 
      14             : namespace mozilla {
      15             : 
      16             : namespace dom {
      17             : 
      18             : class AudioContext;
      19             : struct MediaStreamAudioSourceOptions;
      20             : 
      21           0 : class MediaStreamAudioSourceNodeEngine final : public AudioNodeEngine
      22             : {
      23             : public:
      24           0 :   explicit MediaStreamAudioSourceNodeEngine(AudioNode* aNode)
      25           0 :     : AudioNodeEngine(aNode), mEnabled(false) {}
      26             : 
      27           0 :   bool IsEnabled() const { return mEnabled; }
      28             :   enum Parameters {
      29             :     ENABLE
      30             :   };
      31           0 :   void SetInt32Parameter(uint32_t aIndex, int32_t aValue) override
      32             :   {
      33           0 :     switch (aIndex) {
      34             :     case ENABLE:
      35           0 :       mEnabled = !!aValue;
      36           0 :       break;
      37             :     default:
      38           0 :       NS_ERROR("MediaStreamAudioSourceNodeEngine bad parameter index");
      39             :     }
      40           0 :   }
      41             : 
      42             : private:
      43             :   bool mEnabled;
      44             : };
      45             : 
      46             : class MediaStreamAudioSourceNode : public AudioNode,
      47             :                                    public DOMMediaStream::TrackListener,
      48             :                                    public PrincipalChangeObserver<MediaStreamTrack>
      49             : {
      50             : public:
      51             :   static already_AddRefed<MediaStreamAudioSourceNode>
      52             :   Create(AudioContext& aContext, const MediaStreamAudioSourceOptions& aOptions,
      53             :          ErrorResult& aRv);
      54             : 
      55             :   NS_DECL_ISUPPORTS_INHERITED
      56           0 :   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MediaStreamAudioSourceNode, AudioNode)
      57             : 
      58             :   static already_AddRefed<MediaStreamAudioSourceNode>
      59           0 :   Constructor(const GlobalObject& aGlobal, AudioContext& aAudioContext,
      60             :               const MediaStreamAudioSourceOptions& aOptions, ErrorResult& aRv)
      61             :   {
      62           0 :     return Create(aAudioContext, aOptions, aRv);
      63             :   }
      64             : 
      65             :   JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
      66             : 
      67             :   void DestroyMediaStream() override;
      68             : 
      69           0 :   uint16_t NumberOfInputs() const override { return 0; }
      70             : 
      71           0 :   const char* NodeType() const override
      72             :   {
      73           0 :     return "MediaStreamAudioSourceNode";
      74             :   }
      75             : 
      76           0 :   virtual const char* CrossOriginErrorString() const
      77             :   {
      78           0 :     return "MediaStreamAudioSourceNodeCrossOrigin";
      79             :   }
      80             : 
      81             :   size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
      82             :   size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
      83             : 
      84             :   // Attaches to aTrack so that its audio content will be used as input.
      85             :   void AttachToTrack(const RefPtr<MediaStreamTrack>& aTrack);
      86             : 
      87             :   // Detaches from the currently attached track if there is one.
      88             :   void DetachFromTrack();
      89             : 
      90             :   // Attaches to the first available audio track in aMediaStream.
      91             :   void AttachToFirstTrack(const RefPtr<DOMMediaStream>& aMediaStream);
      92             : 
      93             :   // From DOMMediaStream::TrackListener.
      94             :   void NotifyTrackAdded(const RefPtr<MediaStreamTrack>& aTrack) override;
      95             :   void NotifyTrackRemoved(const RefPtr<MediaStreamTrack>& aTrack) override;
      96             : 
      97             :   // From PrincipalChangeObserver<MediaStreamTrack>.
      98             :   void PrincipalChanged(MediaStreamTrack* aMediaStreamTrack) override;
      99             : 
     100             : protected:
     101             :   explicit MediaStreamAudioSourceNode(AudioContext* aContext);
     102             :   void Init(DOMMediaStream* aMediaStream, ErrorResult& aRv);
     103             :   void Destroy();
     104             :   virtual ~MediaStreamAudioSourceNode();
     105             : 
     106             : private:
     107             :   RefPtr<MediaInputPort> mInputPort;
     108             :   RefPtr<DOMMediaStream> mInputStream;
     109             : 
     110             :   // On construction we set this to the first audio track of mInputStream.
     111             :   RefPtr<MediaStreamTrack> mInputTrack;
     112             : };
     113             : 
     114             : } // namespace dom
     115             : } // namespace mozilla
     116             : 
     117             : #endif