gecko/content/media/webaudio/OscillatorNode.h
Ralph Giles fc6c1b487b Bug 865253 - Part 4: Stop OscillatorNodes on context shutdown. r=ehsan
Like AudioBufferSourceNode and ScriptProcessorNode, OscillatorNode
holds a self-reference in mPlaying. Keep track of all osc nodes
in the AudioContext and explicitly stop them to make sure this
reference is dropped.
2013-08-19 11:57:00 -07:00

139 lines
3.5 KiB
C++

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