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 ConstantSourceNode_h_
8 #define ConstantSourceNode_h_
9 
10 #include "AudioScheduledSourceNode.h"
11 #include "AudioParam.h"
12 #include "mozilla/dom/ConstantSourceNodeBinding.h"
13 
14 namespace mozilla {
15 namespace dom {
16 
17 class AudioContext;
18 
19 class ConstantSourceNode final : public AudioScheduledSourceNode,
20                                  public MainThreadMediaTrackListener {
21  public:
22   explicit ConstantSourceNode(AudioContext* aContext);
23 
24   NS_DECL_ISUPPORTS_INHERITED
25   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ConstantSourceNode,
26                                            AudioScheduledSourceNode)
27 
28   JSObject* WrapObject(JSContext* aCx,
29                        JS::Handle<JSObject*> aGivenProto) override;
30 
31   static already_AddRefed<ConstantSourceNode> Constructor(
32       const GlobalObject& aGlobal, AudioContext& aContext,
33       const ConstantSourceOptions& aOptions);
34 
35   void DestroyMediaTrack() override;
36 
NumberOfInputs()37   uint16_t NumberOfInputs() const final { return 0; }
38 
Offset()39   AudioParam* Offset() const { return mOffset; }
40 
41   void Start(double aWhen, ErrorResult& rv) override;
42   void Stop(double aWhen, ErrorResult& rv) override;
43 
44   void NotifyMainThreadTrackEnded() override;
45 
NodeType()46   const char* NodeType() const override { return "ConstantSourceNode"; }
47 
48   size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
49   size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
50 
51  protected:
52   virtual ~ConstantSourceNode();
53 
54  private:
55   RefPtr<AudioParam> mOffset;
56   bool mStartCalled;
57 };
58 
59 }  // namespace dom
60 }  // namespace mozilla
61 
62 #endif
63