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comparison: content/media/webaudio/AudioBufferSourceNode.h
content/media/webaudio/AudioBufferSourceNode.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 AudioBufferSourceNode_h_ | |
| 8 #define AudioBufferSourceNode_h_ | |
| 9 | |
| 10 #include "AudioNode.h" | |
| 11 #include "AudioBuffer.h" | |
| 12 | |
| 13 namespace mozilla { | |
| 14 namespace dom { | |
| 15 | |
| 16 class AudioParam; | |
| 17 | |
| 18 class AudioBufferSourceNode : public AudioNode, | |
| 19 public MainThreadMediaStreamListener | |
| 20 { | |
| 21 public: | |
| 22 explicit AudioBufferSourceNode(AudioContext* aContext); | |
| 23 virtual ~AudioBufferSourceNode(); | |
| 24 | |
| 25 virtual void DestroyMediaStream() MOZ_OVERRIDE | |
| 26 { | |
| 27 if (mStream) { | |
| 28 mStream->RemoveMainThreadListener(this); | |
| 29 } | |
| 30 AudioNode::DestroyMediaStream(); | |
| 31 } | |
| 32 virtual uint16_t NumberOfInputs() const MOZ_FINAL MOZ_OVERRIDE | |
| 33 { | |
| 34 return 0; | |
| 35 } | |
| 36 virtual AudioBufferSourceNode* AsAudioBufferSourceNode() MOZ_OVERRIDE | |
| 37 { | |
| 38 return this; | |
| 39 } | |
| 40 NS_DECL_ISUPPORTS_INHERITED | |
| 41 NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioBufferSourceNode, AudioNode) | |
| 42 | |
| 43 virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE; | |
| 44 | |
| 45 void Start(double aWhen, double aOffset, | |
| 46 const Optional<double>& aDuration, ErrorResult& aRv); | |
| 47 void Stop(double aWhen, ErrorResult& aRv); | |
| 48 | |
| 49 AudioBuffer* GetBuffer(JSContext* aCx) const | |
| 50 { | |
| 51 return mBuffer; | |
| 52 } | |
| 53 void SetBuffer(JSContext* aCx, AudioBuffer* aBuffer) | |
| 54 { | |
| 55 mBuffer = aBuffer; | |
| 56 SendBufferParameterToStream(aCx); | |
| 57 SendLoopParametersToStream(); | |
| 58 } | |
| 59 AudioParam* PlaybackRate() const | |
| 60 { | |
| 61 return mPlaybackRate; | |
| 62 } | |
| 63 bool Loop() const | |
| 64 { | |
| 65 return mLoop; | |
| 66 } | |
| 67 void SetLoop(bool aLoop) | |
| 68 { | |
| 69 mLoop = aLoop; | |
| 70 SendLoopParametersToStream(); | |
| 71 } | |
| 72 double LoopStart() const | |
| 73 { | |
| 74 return mLoopStart; | |
| 75 } | |
| 76 void SetLoopStart(double aStart) | |
| 77 { | |
| 78 mLoopStart = aStart; | |
| 79 SendLoopParametersToStream(); | |
| 80 } | |
| 81 double LoopEnd() const | |
| 82 { | |
| 83 return mLoopEnd; | |
| 84 } | |
| 85 void SetLoopEnd(double aEnd) | |
| 86 { | |
| 87 mLoopEnd = aEnd; | |
| 88 SendLoopParametersToStream(); | |
| 89 } | |
| 90 void SendDopplerShiftToStream(double aDopplerShift); | |
| 91 | |
| 92 IMPL_EVENT_HANDLER(ended) | |
| 93 | |
| 94 virtual void NotifyMainThreadStateChanged() MOZ_OVERRIDE; | |
| 95 | |
| 96 virtual const char* NodeType() const | |
| 97 { | |
| 98 return "AudioBufferSourceNode"; | |
| 99 } | |
| 100 | |
| 101 virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE; | |
| 102 virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE; | |
| 103 | |
| 104 private: | |
| 105 friend class AudioBufferSourceNodeEngine; | |
| 106 // START is sent during Start(). | |
| 107 // STOP is sent during Stop(). | |
| 108 // BUFFERSTART and BUFFEREND are sent when SetBuffer() and Start() have | |
| 109 // been called (along with sending the buffer). | |
| 110 enum EngineParameters { | |
| 111 SAMPLE_RATE, | |
| 112 START, | |
| 113 STOP, | |
| 114 // BUFFERSTART is the "offset" passed to start(), multiplied by | |
| 115 // buffer.sampleRate. | |
| 116 BUFFERSTART, | |
| 117 // BUFFEREND is the sum of "offset" and "duration" passed to start(), | |
| 118 // multiplied by buffer.sampleRate, or the size of the buffer, if smaller. | |
| 119 BUFFEREND, | |
| 120 LOOP, | |
| 121 LOOPSTART, | |
| 122 LOOPEND, | |
| 123 PLAYBACKRATE, | |
| 124 DOPPLERSHIFT | |
| 125 }; | |
| 126 | |
| 127 void SendLoopParametersToStream(); | |
| 128 void SendBufferParameterToStream(JSContext* aCx); | |
| 129 void SendOffsetAndDurationParametersToStream(AudioNodeStream* aStream); | |
| 130 static void SendPlaybackRateToStream(AudioNode* aNode); | |
| 131 | |
| 132 private: | |
| 133 double mLoopStart; | |
| 134 double mLoopEnd; | |
| 135 double mOffset; | |
| 136 double mDuration; | |
| 137 nsRefPtr<AudioBuffer> mBuffer; | |
| 138 nsRefPtr<AudioParam> mPlaybackRate; | |
| 139 bool mLoop; | |
| 140 bool mStartCalled; | |
| 141 bool mStopped; | |
| 142 }; | |
| 143 | |
| 144 } | |
| 145 } | |
| 146 | |
| 147 #endif | |
| 148 |
