michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef OscillatorNode_h_
michael@0: #define OscillatorNode_h_
michael@0: 
michael@0: #include "AudioNode.h"
michael@0: #include "AudioParam.h"
michael@0: #include "PeriodicWave.h"
michael@0: #include "mozilla/dom/OscillatorNodeBinding.h"
michael@0: #include "mozilla/Preferences.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: class AudioContext;
michael@0: 
michael@0: class OscillatorNode : public AudioNode,
michael@0:                        public MainThreadMediaStreamListener
michael@0: {
michael@0: public:
michael@0:   explicit OscillatorNode(AudioContext* aContext);
michael@0:   virtual ~OscillatorNode();
michael@0: 
michael@0:   NS_DECL_ISUPPORTS_INHERITED
michael@0:   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(OscillatorNode, AudioNode)
michael@0: 
michael@0:   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual void DestroyMediaStream() MOZ_OVERRIDE
michael@0:   {
michael@0:     if (mStream) {
michael@0:       mStream->RemoveMainThreadListener(this);
michael@0:     }
michael@0:     AudioNode::DestroyMediaStream();
michael@0:   }
michael@0:   virtual uint16_t NumberOfInputs() const MOZ_FINAL MOZ_OVERRIDE
michael@0:   {
michael@0:     return 0;
michael@0:   }
michael@0: 
michael@0:   OscillatorType Type() const
michael@0:   {
michael@0:     return mType;
michael@0:   }
michael@0:   void SetType(OscillatorType aType, ErrorResult& aRv)
michael@0:   {
michael@0:     if (!Preferences::GetBool("media.webaudio.legacy.OscillatorNode")) {
michael@0:       // Do not accept the alternate enum values unless the legacy pref
michael@0:       // has been turned on.
michael@0:       switch (aType) {
michael@0:       case OscillatorType::_0:
michael@0:       case OscillatorType::_1:
michael@0:       case OscillatorType::_2:
michael@0:       case OscillatorType::_3:
michael@0:       case OscillatorType::_4:
michael@0:         // Do nothing in order to emulate setting an invalid enum value.
michael@0:         return;
michael@0:       default:
michael@0:         // Shut up the compiler warning
michael@0:         break;
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     // Handle the alternate enum values
michael@0:     switch (aType) {
michael@0:     case OscillatorType::_0: aType = OscillatorType::Sine; break;
michael@0:     case OscillatorType::_1: aType = OscillatorType::Square; break;
michael@0:     case OscillatorType::_2: aType = OscillatorType::Sawtooth; break;
michael@0:     case OscillatorType::_3: aType = OscillatorType::Triangle; break;
michael@0:     case OscillatorType::_4: aType = OscillatorType::Custom; break;
michael@0:     default:
michael@0:       // Shut up the compiler warning
michael@0:       break;
michael@0:     }
michael@0:     if (aType == OscillatorType::Custom) {
michael@0:       // ::Custom can only be set by setPeriodicWave().
michael@0:       // https://github.com/WebAudio/web-audio-api/issues/105 for exception.
michael@0:       aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
michael@0:       return;
michael@0:     }
michael@0:     mType = aType;
michael@0:     SendTypeToStream();
michael@0:   }
michael@0: 
michael@0:   AudioParam* Frequency() const
michael@0:   {
michael@0:     return mFrequency;
michael@0:   }
michael@0:   AudioParam* Detune() const
michael@0:   {
michael@0:     return mDetune;
michael@0:   }
michael@0: 
michael@0:   void Start(double aWhen, ErrorResult& aRv);
michael@0:   void NoteOn(double aWhen, ErrorResult& aRv)
michael@0:   {
michael@0:     Start(aWhen, aRv);
michael@0:   }
michael@0:   void Stop(double aWhen, ErrorResult& aRv);
michael@0:   void NoteOff(double aWhen, ErrorResult& aRv)
michael@0:   {
michael@0:     Stop(aWhen, aRv);
michael@0:   }
michael@0:   void SetPeriodicWave(PeriodicWave& aPeriodicWave)
michael@0:   {
michael@0:     mPeriodicWave = &aPeriodicWave;
michael@0:     // SendTypeToStream will call SendPeriodicWaveToStream for us.
michael@0:     mType = OscillatorType::Custom;
michael@0:     SendTypeToStream();
michael@0:   }
michael@0: 
michael@0:   IMPL_EVENT_HANDLER(ended)
michael@0: 
michael@0:   virtual void NotifyMainThreadStateChanged() MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual const char* NodeType() const
michael@0:   {
michael@0:     return "OscillatorNode";
michael@0:   }
michael@0: 
michael@0:   virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
michael@0:   virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:   static void SendFrequencyToStream(AudioNode* aNode);
michael@0:   static void SendDetuneToStream(AudioNode* aNode);
michael@0:   void SendTypeToStream();
michael@0:   void SendPeriodicWaveToStream();
michael@0: 
michael@0: private:
michael@0:   OscillatorType mType;
michael@0:   nsRefPtr<PeriodicWave> mPeriodicWave;
michael@0:   nsRefPtr<AudioParam> mFrequency;
michael@0:   nsRefPtr<AudioParam> mDetune;
michael@0:   bool mStartCalled;
michael@0:   bool mStopped;
michael@0: };
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif
michael@0: