michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef AudioParam_h_
michael@0: #define AudioParam_h_
michael@0: 
michael@0: #include "AudioParamTimeline.h"
michael@0: #include "nsWrapperCache.h"
michael@0: #include "nsCycleCollectionParticipant.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "AudioNode.h"
michael@0: #include "mozilla/dom/TypedArray.h"
michael@0: #include "WebAudioUtils.h"
michael@0: #include "js/TypeDecls.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: namespace dom {
michael@0: 
michael@0: class AudioParam MOZ_FINAL : public nsWrapperCache,
michael@0:                              public AudioParamTimeline
michael@0: {
michael@0: public:
michael@0:   typedef void (*CallbackType)(AudioNode*);
michael@0: 
michael@0:   AudioParam(AudioNode* aNode,
michael@0:              CallbackType aCallback,
michael@0:              float aDefaultValue);
michael@0:   virtual ~AudioParam();
michael@0: 
michael@0:   NS_IMETHOD_(MozExternalRefCountType) AddRef(void);
michael@0:   NS_IMETHOD_(MozExternalRefCountType) Release(void);
michael@0:   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(AudioParam)
michael@0: 
michael@0:   AudioContext* GetParentObject() const
michael@0:   {
michael@0:     return mNode->Context();
michael@0:   }
michael@0: 
michael@0:   double DOMTimeToStreamTime(double aTime) const
michael@0:   {
michael@0:     return mNode->Context()->DOMTimeToStreamTime(aTime);
michael@0:   }
michael@0: 
michael@0:   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
michael@0: 
michael@0:   // We override SetValueCurveAtTime to convert the Float32Array to the wrapper
michael@0:   // object.
michael@0:   void SetValueCurveAtTime(const Float32Array& aValues, double aStartTime, double aDuration, ErrorResult& aRv)
michael@0:   {
michael@0:     if (!WebAudioUtils::IsTimeValid(aStartTime)) {
michael@0:       aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
michael@0:       return;
michael@0:     }
michael@0:     aValues.ComputeLengthAndData();
michael@0:     AudioParamTimeline::SetValueCurveAtTime(aValues.Data(), aValues.Length(),
michael@0:                                             DOMTimeToStreamTime(aStartTime), aDuration, aRv);
michael@0:     mCallback(mNode);
michael@0:   }
michael@0: 
michael@0:   // We override the rest of the mutating AudioParamTimeline methods in order to make
michael@0:   // sure that the callback is called every time that this object gets mutated.
michael@0:   void SetValue(float aValue)
michael@0:   {
michael@0:     // Optimize away setting the same value on an AudioParam
michael@0:     if (HasSimpleValue() &&
michael@0:         WebAudioUtils::FuzzyEqual(GetValue(), aValue)) {
michael@0:       return;
michael@0:     }
michael@0:     AudioParamTimeline::SetValue(aValue);
michael@0:     mCallback(mNode);
michael@0:   }
michael@0:   void SetValueAtTime(float aValue, double aStartTime, ErrorResult& aRv)
michael@0:   {
michael@0:     if (!WebAudioUtils::IsTimeValid(aStartTime)) {
michael@0:       aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
michael@0:       return;
michael@0:     }
michael@0:     AudioParamTimeline::SetValueAtTime(aValue, DOMTimeToStreamTime(aStartTime), aRv);
michael@0:     mCallback(mNode);
michael@0:   }
michael@0:   void LinearRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
michael@0:   {
michael@0:     if (!WebAudioUtils::IsTimeValid(aEndTime)) {
michael@0:       aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
michael@0:       return;
michael@0:     }
michael@0:     AudioParamTimeline::LinearRampToValueAtTime(aValue, DOMTimeToStreamTime(aEndTime), aRv);
michael@0:     mCallback(mNode);
michael@0:   }
michael@0:   void ExponentialRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
michael@0:   {
michael@0:     if (!WebAudioUtils::IsTimeValid(aEndTime)) {
michael@0:       aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
michael@0:       return;
michael@0:     }
michael@0:     AudioParamTimeline::ExponentialRampToValueAtTime(aValue, DOMTimeToStreamTime(aEndTime), aRv);
michael@0:     mCallback(mNode);
michael@0:   }
michael@0:   void SetTargetAtTime(float aTarget, double aStartTime, double aTimeConstant, ErrorResult& aRv)
michael@0:   {
michael@0:     if (!WebAudioUtils::IsTimeValid(aStartTime) ||
michael@0:         !WebAudioUtils::IsTimeValid(aTimeConstant)) {
michael@0:       aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
michael@0:       return;
michael@0:     }
michael@0:     AudioParamTimeline::SetTargetAtTime(aTarget, DOMTimeToStreamTime(aStartTime), aTimeConstant, aRv);
michael@0:     mCallback(mNode);
michael@0:   }
michael@0:   void CancelScheduledValues(double aStartTime, ErrorResult& aRv)
michael@0:   {
michael@0:     if (!WebAudioUtils::IsTimeValid(aStartTime)) {
michael@0:       aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
michael@0:       return;
michael@0:     }
michael@0:     AudioParamTimeline::CancelScheduledValues(DOMTimeToStreamTime(aStartTime));
michael@0:     mCallback(mNode);
michael@0:   }
michael@0: 
michael@0:   float DefaultValue() const
michael@0:   {
michael@0:     return mDefaultValue;
michael@0:   }
michael@0: 
michael@0:   AudioNode* Node() const
michael@0:   {
michael@0:     return mNode;
michael@0:   }
michael@0: 
michael@0:   const nsTArray<AudioNode::InputNode>& InputNodes() const
michael@0:   {
michael@0:     return mInputNodes;
michael@0:   }
michael@0: 
michael@0:   void RemoveInputNode(uint32_t aIndex)
michael@0:   {
michael@0:     mInputNodes.RemoveElementAt(aIndex);
michael@0:   }
michael@0: 
michael@0:   AudioNode::InputNode* AppendInputNode()
michael@0:   {
michael@0:     return mInputNodes.AppendElement();
michael@0:   }
michael@0: 
michael@0:   void DisconnectFromGraphAndDestroyStream();
michael@0: 
michael@0:   // May create the stream if it doesn't exist
michael@0:   MediaStream* Stream();
michael@0: 
michael@0:   virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE
michael@0:   {
michael@0:     size_t amount = AudioParamTimeline::SizeOfExcludingThis(aMallocSizeOf);
michael@0:     // Not owned:
michael@0:     // - mNode
michael@0: 
michael@0:     // Just count the array, actual nodes are counted in mNode.
michael@0:     amount += mInputNodes.SizeOfExcludingThis(aMallocSizeOf);
michael@0: 
michael@0:     if (mNodeStreamPort) {
michael@0:       amount += mNodeStreamPort->SizeOfIncludingThis(aMallocSizeOf);
michael@0:     }
michael@0: 
michael@0:     return amount;
michael@0:   }
michael@0: 
michael@0:   virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE
michael@0:   {
michael@0:     return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
michael@0:   }
michael@0: 
michael@0: protected:
michael@0:   nsCycleCollectingAutoRefCnt mRefCnt;
michael@0:   NS_DECL_OWNINGTHREAD
michael@0: 
michael@0: private:
michael@0:   nsRefPtr<AudioNode> mNode;
michael@0:   // For every InputNode, there is a corresponding entry in mOutputParams of the
michael@0:   // InputNode's mInputNode.
michael@0:   nsTArray<AudioNode::InputNode> mInputNodes;
michael@0:   CallbackType mCallback;
michael@0:   const float mDefaultValue;
michael@0:   // The input port used to connect the AudioParam's stream to its node's stream
michael@0:   nsRefPtr<MediaInputPort> mNodeStreamPort;
michael@0: };
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif
michael@0: