зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
2.4 KiB
C++
105 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef OscillatorNode_h_
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#define OscillatorNode_h_
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#include "AudioNode.h"
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#include "AudioParam.h"
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#include "PeriodicWave.h"
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#include "mozilla/dom/OscillatorNodeBinding.h"
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namespace mozilla {
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namespace dom {
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class AudioContext;
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class OscillatorNode final : public AudioNode,
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public MainThreadMediaStreamListener
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{
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public:
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explicit OscillatorNode(AudioContext* aContext);
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(OscillatorNode, AudioNode)
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JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
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void DestroyMediaStream() override;
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uint16_t NumberOfInputs() const final override
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{
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return 0;
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}
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OscillatorType Type() const
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{
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return mType;
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}
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void SetType(OscillatorType aType, ErrorResult& aRv)
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{
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if (aType == OscillatorType::Custom) {
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// ::Custom can only be set by setPeriodicWave().
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// https://github.com/WebAudio/web-audio-api/issues/105 for exception.
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aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
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return;
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}
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mType = aType;
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SendTypeToStream();
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}
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AudioParam* Frequency() const
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{
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return mFrequency;
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}
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AudioParam* Detune() const
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{
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return mDetune;
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}
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void Start(double aWhen, ErrorResult& aRv);
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void Stop(double aWhen, ErrorResult& aRv);
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void SetPeriodicWave(PeriodicWave& aPeriodicWave)
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{
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mPeriodicWave = &aPeriodicWave;
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// SendTypeToStream will call SendPeriodicWaveToStream for us.
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mType = OscillatorType::Custom;
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SendTypeToStream();
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}
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IMPL_EVENT_HANDLER(ended)
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void NotifyMainThreadStreamFinished() override;
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const char* NodeType() const override
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{
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return "OscillatorNode";
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}
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size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
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size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
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protected:
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virtual ~OscillatorNode();
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private:
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void SendTypeToStream();
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void SendPeriodicWaveToStream();
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private:
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OscillatorType mType;
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RefPtr<PeriodicWave> mPeriodicWave;
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RefPtr<AudioParam> mFrequency;
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RefPtr<AudioParam> mDetune;
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bool mStartCalled;
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};
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} // namespace dom
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} // namespace mozilla
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#endif
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