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comparison: content/media/webaudio/OscillatorNode.h
content/media/webaudio/OscillatorNode.h
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| 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 OscillatorNode_h_ | |
| 8 #define OscillatorNode_h_ | |
| 9 | |
| 10 #include "AudioNode.h" | |
| 11 #include "AudioParam.h" | |
| 12 #include "PeriodicWave.h" | |
| 13 #include "mozilla/dom/OscillatorNodeBinding.h" | |
| 14 #include "mozilla/Preferences.h" | |
| 15 | |
| 16 namespace mozilla { | |
| 17 namespace dom { | |
| 18 | |
| 19 class AudioContext; | |
| 20 | |
| 21 class OscillatorNode : public AudioNode, | |
| 22 public MainThreadMediaStreamListener | |
| 23 { | |
| 24 public: | |
| 25 explicit OscillatorNode(AudioContext* aContext); | |
| 26 virtual ~OscillatorNode(); | |
| 27 | |
| 28 NS_DECL_ISUPPORTS_INHERITED | |
| 29 NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(OscillatorNode, AudioNode) | |
| 30 | |
| 31 virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE; | |
| 32 | |
| 33 virtual void DestroyMediaStream() MOZ_OVERRIDE | |
| 34 { | |
| 35 if (mStream) { | |
| 36 mStream->RemoveMainThreadListener(this); | |
| 37 } | |
| 38 AudioNode::DestroyMediaStream(); | |
| 39 } | |
| 40 virtual uint16_t NumberOfInputs() const MOZ_FINAL MOZ_OVERRIDE | |
| 41 { | |
| 42 return 0; | |
| 43 } | |
| 44 | |
| 45 OscillatorType Type() const | |
| 46 { | |
| 47 return mType; | |
| 48 } | |
| 49 void SetType(OscillatorType aType, ErrorResult& aRv) | |
| 50 { | |
| 51 if (!Preferences::GetBool("media.webaudio.legacy.OscillatorNode")) { | |
| 52 // Do not accept the alternate enum values unless the legacy pref | |
| 53 // has been turned on. | |
| 54 switch (aType) { | |
| 55 case OscillatorType::_0: | |
| 56 case OscillatorType::_1: | |
| 57 case OscillatorType::_2: | |
| 58 case OscillatorType::_3: | |
| 59 case OscillatorType::_4: | |
| 60 // Do nothing in order to emulate setting an invalid enum value. | |
| 61 return; | |
| 62 default: | |
| 63 // Shut up the compiler warning | |
| 64 break; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 // Handle the alternate enum values | |
| 69 switch (aType) { | |
| 70 case OscillatorType::_0: aType = OscillatorType::Sine; break; | |
| 71 case OscillatorType::_1: aType = OscillatorType::Square; break; | |
| 72 case OscillatorType::_2: aType = OscillatorType::Sawtooth; break; | |
| 73 case OscillatorType::_3: aType = OscillatorType::Triangle; break; | |
| 74 case OscillatorType::_4: aType = OscillatorType::Custom; break; | |
| 75 default: | |
| 76 // Shut up the compiler warning | |
| 77 break; | |
| 78 } | |
| 79 if (aType == OscillatorType::Custom) { | |
| 80 // ::Custom can only be set by setPeriodicWave(). | |
| 81 // https://github.com/WebAudio/web-audio-api/issues/105 for exception. | |
| 82 aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); | |
| 83 return; | |
| 84 } | |
| 85 mType = aType; | |
| 86 SendTypeToStream(); | |
| 87 } | |
| 88 | |
| 89 AudioParam* Frequency() const | |
| 90 { | |
| 91 return mFrequency; | |
| 92 } | |
| 93 AudioParam* Detune() const | |
| 94 { | |
| 95 return mDetune; | |
| 96 } | |
| 97 | |
| 98 void Start(double aWhen, ErrorResult& aRv); | |
| 99 void NoteOn(double aWhen, ErrorResult& aRv) | |
| 100 { | |
| 101 Start(aWhen, aRv); | |
| 102 } | |
| 103 void Stop(double aWhen, ErrorResult& aRv); | |
| 104 void NoteOff(double aWhen, ErrorResult& aRv) | |
| 105 { | |
| 106 Stop(aWhen, aRv); | |
| 107 } | |
| 108 void SetPeriodicWave(PeriodicWave& aPeriodicWave) | |
| 109 { | |
| 110 mPeriodicWave = &aPeriodicWave; | |
| 111 // SendTypeToStream will call SendPeriodicWaveToStream for us. | |
| 112 mType = OscillatorType::Custom; | |
| 113 SendTypeToStream(); | |
| 114 } | |
| 115 | |
| 116 IMPL_EVENT_HANDLER(ended) | |
| 117 | |
| 118 virtual void NotifyMainThreadStateChanged() MOZ_OVERRIDE; | |
| 119 | |
| 120 virtual const char* NodeType() const | |
| 121 { | |
| 122 return "OscillatorNode"; | |
| 123 } | |
| 124 | |
| 125 virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE; | |
| 126 virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE; | |
| 127 | |
| 128 private: | |
| 129 static void SendFrequencyToStream(AudioNode* aNode); | |
| 130 static void SendDetuneToStream(AudioNode* aNode); | |
| 131 void SendTypeToStream(); | |
| 132 void SendPeriodicWaveToStream(); | |
| 133 | |
| 134 private: | |
| 135 OscillatorType mType; | |
| 136 nsRefPtr<PeriodicWave> mPeriodicWave; | |
| 137 nsRefPtr<AudioParam> mFrequency; | |
| 138 nsRefPtr<AudioParam> mDetune; | |
| 139 bool mStartCalled; | |
| 140 bool mStopped; | |
| 141 }; | |
| 142 | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 #endif | |
| 147 |
