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120 lines
2.8 KiB
C++
120 lines
2.8 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 "AudioContext.h"
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#include "mozilla/dom/TypedArray.h"
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#include "mozilla/Util.h"
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struct JSContext;
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class nsIDOMWindow;
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namespace mozilla {
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class ErrorResult;
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namespace dom {
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namespace detail {
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// This class wraps a JS typed array so that AudioEventTimeline does not need
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// to know about JSObjects directly.
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class FloatArrayWrapper
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{
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public:
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FloatArrayWrapper() // creates an uninitialized object
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{
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}
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FloatArrayWrapper(const Float32Array& array)
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{
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mArray.construct(array);
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}
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FloatArrayWrapper(const FloatArrayWrapper& rhs)
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{
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MOZ_ASSERT(!rhs.mArray.empty());
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mArray.construct(rhs.mArray.ref());
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}
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FloatArrayWrapper& operator=(const FloatArrayWrapper& rhs)
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{
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MOZ_ASSERT(!rhs.mArray.empty());
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mArray.destroyIfConstructed();
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mArray.construct(rhs.mArray.ref());
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return *this;
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}
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// Expose the API used by AudioEventTimeline
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float* Data() const
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{
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MOZ_ASSERT(inited());
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return mArray.ref().Data();
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}
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uint32_t Length() const
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{
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MOZ_ASSERT(inited());
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return mArray.ref().Length();
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}
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bool inited() const
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{
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return !mArray.empty();
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}
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private:
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Maybe<Float32Array> mArray;
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};
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}
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typedef AudioEventTimeline<detail::FloatArrayWrapper, 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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AudioParam(AudioContext* aContext,
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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 mContext;
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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(detail::FloatArrayWrapper(aValues),
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aStartTime, aDuration, aRv);
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}
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private:
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nsRefPtr<AudioContext> mContext;
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};
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}
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}
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#endif
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