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f39e83f1de
We need this in order to update the MediaStreamGraph thread when an AudioParam changes. This enables each AudioParam to be registered with a callback from its owner node, so that the owner node can have custom processing code for each AudioParam's mutation.
125 lines
3.4 KiB
C++
125 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef AudioParam_h_
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#define AudioParam_h_
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#include "AudioEventTimeline.h"
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#include "nsWrapperCache.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsCOMPtr.h"
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#include "EnableWebAudioCheck.h"
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#include "nsAutoPtr.h"
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#include "AudioNode.h"
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#include "mozilla/dom/TypedArray.h"
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#include "mozilla/Util.h"
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#include "mozilla/ErrorResult.h"
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struct JSContext;
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class nsIDOMWindow;
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namespace mozilla {
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namespace dom {
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typedef AudioEventTimeline<ErrorResult> AudioParamTimeline;
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class AudioParam MOZ_FINAL : public nsWrapperCache,
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public EnableWebAudioCheck,
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public AudioParamTimeline
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{
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public:
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typedef void (*CallbackType)(AudioNode*);
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AudioParam(AudioNode* aNode,
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CallbackType aCallback,
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float aDefaultValue,
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float aMinValue,
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float aMaxValue);
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virtual ~AudioParam();
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NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(AudioParam)
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(AudioParam)
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AudioContext* GetParentObject() const
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{
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return mNode->Context();
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}
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virtual JSObject* WrapObject(JSContext* aCx, JSObject* aScope,
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bool* aTriedToWrap);
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// We override SetValueCurveAtTime to convert the Float32Array to the wrapper
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// object.
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void SetValueCurveAtTime(JSContext* cx, const Float32Array& aValues, double aStartTime, double aDuration, ErrorResult& aRv)
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{
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AudioParamTimeline::SetValueCurveAtTime(aValues.Data(), aValues.Length(),
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aStartTime, aDuration, aRv);
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mCallback(mNode);
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}
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// We override the rest of the mutating AudioParamTimeline methods in order to make
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// sure that the callback is called every time that this object gets mutated.
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void SetValue(float aValue)
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{
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AudioParamTimeline::SetValue(aValue);
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mCallback(mNode);
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}
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void SetValueAtTime(float aValue, double aStartTime, ErrorResult& aRv)
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{
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AudioParamTimeline::SetValueAtTime(aValue, aStartTime, aRv);
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mCallback(mNode);
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}
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void LinearRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
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{
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AudioParamTimeline::LinearRampToValueAtTime(aValue, aEndTime, aRv);
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mCallback(mNode);
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}
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void ExponentialRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
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{
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AudioParamTimeline::ExponentialRampToValueAtTime(aValue, aEndTime, aRv);
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mCallback(mNode);
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}
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void SetTargetAtTime(float aTarget, double aStartTime, double aTimeConstant, ErrorResult& aRv)
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{
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AudioParamTimeline::SetTargetAtTime(aTarget, aStartTime, aTimeConstant, aRv);
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mCallback(mNode);
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}
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void CancelScheduledValues(double aStartTime)
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{
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AudioParamTimeline::CancelScheduledValues(aStartTime);
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mCallback(mNode);
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}
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float MinValue() const
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{
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return mMinValue;
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}
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float MaxValue() const
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{
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return mMaxValue;
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}
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float DefaultValue() const
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{
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return mDefaultValue;
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}
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private:
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nsRefPtr<AudioNode> mNode;
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CallbackType mCallback;
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const float mDefaultValue;
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const float mMinValue;
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const float mMaxValue;
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};
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}
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}
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#endif
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