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content/media/webaudio/OscillatorNode.h@6474c204b198 (annotated)

content/media/webaudio/OscillatorNode.h

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0	3	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	5	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	#ifndef OscillatorNode_h_
michael@0	8	#define OscillatorNode_h_
michael@0	9
michael@0	10	#include "AudioNode.h"
michael@0	11	#include "AudioParam.h"
michael@0	12	#include "PeriodicWave.h"
michael@0	13	#include "mozilla/dom/OscillatorNodeBinding.h"
michael@0	14	#include "mozilla/Preferences.h"
michael@0	15
michael@0	16	namespace mozilla {
michael@0	17	namespace dom {
michael@0	18
michael@0	19	class AudioContext;
michael@0	20
michael@0	21	class OscillatorNode : public AudioNode,
michael@0	22	public MainThreadMediaStreamListener
michael@0	23	{
michael@0	24	public:
michael@0	25	explicit OscillatorNode(AudioContext* aContext);
michael@0	26	virtual ~OscillatorNode();
michael@0	27
michael@0	28	NS_DECL_ISUPPORTS_INHERITED
michael@0	29	NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(OscillatorNode, AudioNode)
michael@0	30
michael@0	31	virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
michael@0	32
michael@0	33	virtual void DestroyMediaStream() MOZ_OVERRIDE
michael@0	34	{
michael@0	35	if (mStream) {
michael@0	36	mStream->RemoveMainThreadListener(this);
michael@0	37	}
michael@0	38	AudioNode::DestroyMediaStream();
michael@0	39	}
michael@0	40	virtual uint16_t NumberOfInputs() const MOZ_FINAL MOZ_OVERRIDE
michael@0	41	{
michael@0	42	return 0;
michael@0	43	}
michael@0	44
michael@0	45	OscillatorType Type() const
michael@0	46	{
michael@0	47	return mType;
michael@0	48	}
michael@0	49	void SetType(OscillatorType aType, ErrorResult& aRv)
michael@0	50	{
michael@0	51	if (!Preferences::GetBool("media.webaudio.legacy.OscillatorNode")) {
michael@0	52	// Do not accept the alternate enum values unless the legacy pref
michael@0	53	// has been turned on.
michael@0	54	switch (aType) {
michael@0	55	case OscillatorType::_0:
michael@0	56	case OscillatorType::_1:
michael@0	57	case OscillatorType::_2:
michael@0	58	case OscillatorType::_3:
michael@0	59	case OscillatorType::_4:
michael@0	60	// Do nothing in order to emulate setting an invalid enum value.
michael@0	61	return;
michael@0	62	default:
michael@0	63	// Shut up the compiler warning
michael@0	64	break;
michael@0	65	}
michael@0	66	}
michael@0	67
michael@0	68	// Handle the alternate enum values
michael@0	69	switch (aType) {
michael@0	70	case OscillatorType::_0: aType = OscillatorType::Sine; break;
michael@0	71	case OscillatorType::_1: aType = OscillatorType::Square; break;
michael@0	72	case OscillatorType::_2: aType = OscillatorType::Sawtooth; break;
michael@0	73	case OscillatorType::_3: aType = OscillatorType::Triangle; break;
michael@0	74	case OscillatorType::_4: aType = OscillatorType::Custom; break;
michael@0	75	default:
michael@0	76	// Shut up the compiler warning
michael@0	77	break;
michael@0	78	}
michael@0	79	if (aType == OscillatorType::Custom) {
michael@0	80	// ::Custom can only be set by setPeriodicWave().
michael@0	81	// https://github.com/WebAudio/web-audio-api/issues/105 for exception.
michael@0	82	aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
michael@0	83	return;
michael@0	84	}
michael@0	85	mType = aType;
michael@0	86	SendTypeToStream();
michael@0	87	}
michael@0	88
michael@0	89	AudioParam* Frequency() const
michael@0	90	{
michael@0	91	return mFrequency;
michael@0	92	}
michael@0	93	AudioParam* Detune() const
michael@0	94	{
michael@0	95	return mDetune;
michael@0	96	}
michael@0	97
michael@0	98	void Start(double aWhen, ErrorResult& aRv);
michael@0	99	void NoteOn(double aWhen, ErrorResult& aRv)
michael@0	100	{
michael@0	101	Start(aWhen, aRv);
michael@0	102	}
michael@0	103	void Stop(double aWhen, ErrorResult& aRv);
michael@0	104	void NoteOff(double aWhen, ErrorResult& aRv)
michael@0	105	{
michael@0	106	Stop(aWhen, aRv);
michael@0	107	}
michael@0	108	void SetPeriodicWave(PeriodicWave& aPeriodicWave)
michael@0	109	{
michael@0	110	mPeriodicWave = &aPeriodicWave;
michael@0	111	// SendTypeToStream will call SendPeriodicWaveToStream for us.
michael@0	112	mType = OscillatorType::Custom;
michael@0	113	SendTypeToStream();
michael@0	114	}
michael@0	115
michael@0	116	IMPL_EVENT_HANDLER(ended)
michael@0	117
michael@0	118	virtual void NotifyMainThreadStateChanged() MOZ_OVERRIDE;
michael@0	119
michael@0	120	virtual const char* NodeType() const
michael@0	121	{
michael@0	122	return "OscillatorNode";
michael@0	123	}
michael@0	124
michael@0	125	virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
michael@0	126	virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
michael@0	127
michael@0	128	private:
michael@0	129	static void SendFrequencyToStream(AudioNode* aNode);
michael@0	130	static void SendDetuneToStream(AudioNode* aNode);
michael@0	131	void SendTypeToStream();
michael@0	132	void SendPeriodicWaveToStream();
michael@0	133
michael@0	134	private:
michael@0	135	OscillatorType mType;
michael@0	136	nsRefPtr<PeriodicWave> mPeriodicWave;
michael@0	137	nsRefPtr<AudioParam> mFrequency;
michael@0	138	nsRefPtr<AudioParam> mDetune;
michael@0	139	bool mStartCalled;
michael@0	140	bool mStopped;
michael@0	141	};
michael@0	142
michael@0	143	}
michael@0	144	}
michael@0	145
michael@0	146	#endif
michael@0	147