1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/AudioParam.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,193 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef AudioParam_h_
1.11 +#define AudioParam_h_
1.12 +
1.13 +#include "AudioParamTimeline.h"
1.14 +#include "nsWrapperCache.h"
1.15 +#include "nsCycleCollectionParticipant.h"
1.16 +#include "nsAutoPtr.h"
1.17 +#include "AudioNode.h"
1.18 +#include "mozilla/dom/TypedArray.h"
1.19 +#include "WebAudioUtils.h"
1.20 +#include "js/TypeDecls.h"
1.21 +
1.22 +namespace mozilla {
1.23 +
1.24 +namespace dom {
1.25 +
1.26 +class AudioParam MOZ_FINAL : public nsWrapperCache,
1.27 + public AudioParamTimeline
1.28 +{
1.29 +public:
1.30 + typedef void (*CallbackType)(AudioNode*);
1.31 +
1.32 + AudioParam(AudioNode* aNode,
1.33 + CallbackType aCallback,
1.34 + float aDefaultValue);
1.35 + virtual ~AudioParam();
1.36 +
1.37 + NS_IMETHOD_(MozExternalRefCountType) AddRef(void);
1.38 + NS_IMETHOD_(MozExternalRefCountType) Release(void);
1.39 + NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(AudioParam)
1.40 +
1.41 + AudioContext* GetParentObject() const
1.42 + {
1.43 + return mNode->Context();
1.44 + }
1.45 +
1.46 + double DOMTimeToStreamTime(double aTime) const
1.47 + {
1.48 + return mNode->Context()->DOMTimeToStreamTime(aTime);
1.49 + }
1.50 +
1.51 + virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
1.52 +
1.53 + // We override SetValueCurveAtTime to convert the Float32Array to the wrapper
1.54 + // object.
1.55 + void SetValueCurveAtTime(const Float32Array& aValues, double aStartTime, double aDuration, ErrorResult& aRv)
1.56 + {
1.57 + if (!WebAudioUtils::IsTimeValid(aStartTime)) {
1.58 + aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
1.59 + return;
1.60 + }
1.61 + aValues.ComputeLengthAndData();
1.62 + AudioParamTimeline::SetValueCurveAtTime(aValues.Data(), aValues.Length(),
1.63 + DOMTimeToStreamTime(aStartTime), aDuration, aRv);
1.64 + mCallback(mNode);
1.65 + }
1.66 +
1.67 + // We override the rest of the mutating AudioParamTimeline methods in order to make
1.68 + // sure that the callback is called every time that this object gets mutated.
1.69 + void SetValue(float aValue)
1.70 + {
1.71 + // Optimize away setting the same value on an AudioParam
1.72 + if (HasSimpleValue() &&
1.73 + WebAudioUtils::FuzzyEqual(GetValue(), aValue)) {
1.74 + return;
1.75 + }
1.76 + AudioParamTimeline::SetValue(aValue);
1.77 + mCallback(mNode);
1.78 + }
1.79 + void SetValueAtTime(float aValue, double aStartTime, ErrorResult& aRv)
1.80 + {
1.81 + if (!WebAudioUtils::IsTimeValid(aStartTime)) {
1.82 + aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
1.83 + return;
1.84 + }
1.85 + AudioParamTimeline::SetValueAtTime(aValue, DOMTimeToStreamTime(aStartTime), aRv);
1.86 + mCallback(mNode);
1.87 + }
1.88 + void LinearRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
1.89 + {
1.90 + if (!WebAudioUtils::IsTimeValid(aEndTime)) {
1.91 + aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
1.92 + return;
1.93 + }
1.94 + AudioParamTimeline::LinearRampToValueAtTime(aValue, DOMTimeToStreamTime(aEndTime), aRv);
1.95 + mCallback(mNode);
1.96 + }
1.97 + void ExponentialRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
1.98 + {
1.99 + if (!WebAudioUtils::IsTimeValid(aEndTime)) {
1.100 + aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
1.101 + return;
1.102 + }
1.103 + AudioParamTimeline::ExponentialRampToValueAtTime(aValue, DOMTimeToStreamTime(aEndTime), aRv);
1.104 + mCallback(mNode);
1.105 + }
1.106 + void SetTargetAtTime(float aTarget, double aStartTime, double aTimeConstant, ErrorResult& aRv)
1.107 + {
1.108 + if (!WebAudioUtils::IsTimeValid(aStartTime) ||
1.109 + !WebAudioUtils::IsTimeValid(aTimeConstant)) {
1.110 + aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
1.111 + return;
1.112 + }
1.113 + AudioParamTimeline::SetTargetAtTime(aTarget, DOMTimeToStreamTime(aStartTime), aTimeConstant, aRv);
1.114 + mCallback(mNode);
1.115 + }
1.116 + void CancelScheduledValues(double aStartTime, ErrorResult& aRv)
1.117 + {
1.118 + if (!WebAudioUtils::IsTimeValid(aStartTime)) {
1.119 + aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
1.120 + return;
1.121 + }
1.122 + AudioParamTimeline::CancelScheduledValues(DOMTimeToStreamTime(aStartTime));
1.123 + mCallback(mNode);
1.124 + }
1.125 +
1.126 + float DefaultValue() const
1.127 + {
1.128 + return mDefaultValue;
1.129 + }
1.130 +
1.131 + AudioNode* Node() const
1.132 + {
1.133 + return mNode;
1.134 + }
1.135 +
1.136 + const nsTArray<AudioNode::InputNode>& InputNodes() const
1.137 + {
1.138 + return mInputNodes;
1.139 + }
1.140 +
1.141 + void RemoveInputNode(uint32_t aIndex)
1.142 + {
1.143 + mInputNodes.RemoveElementAt(aIndex);
1.144 + }
1.145 +
1.146 + AudioNode::InputNode* AppendInputNode()
1.147 + {
1.148 + return mInputNodes.AppendElement();
1.149 + }
1.150 +
1.151 + void DisconnectFromGraphAndDestroyStream();
1.152 +
1.153 + // May create the stream if it doesn't exist
1.154 + MediaStream* Stream();
1.155 +
1.156 + virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE
1.157 + {
1.158 + size_t amount = AudioParamTimeline::SizeOfExcludingThis(aMallocSizeOf);
1.159 + // Not owned:
1.160 + // - mNode
1.161 +
1.162 + // Just count the array, actual nodes are counted in mNode.
1.163 + amount += mInputNodes.SizeOfExcludingThis(aMallocSizeOf);
1.164 +
1.165 + if (mNodeStreamPort) {
1.166 + amount += mNodeStreamPort->SizeOfIncludingThis(aMallocSizeOf);
1.167 + }
1.168 +
1.169 + return amount;
1.170 + }
1.171 +
1.172 + virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE
1.173 + {
1.174 + return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
1.175 + }
1.176 +
1.177 +protected:
1.178 + nsCycleCollectingAutoRefCnt mRefCnt;
1.179 + NS_DECL_OWNINGTHREAD
1.180 +
1.181 +private:
1.182 + nsRefPtr<AudioNode> mNode;
1.183 + // For every InputNode, there is a corresponding entry in mOutputParams of the
1.184 + // InputNode's mInputNode.
1.185 + nsTArray<AudioNode::InputNode> mInputNodes;
1.186 + CallbackType mCallback;
1.187 + const float mDefaultValue;
1.188 + // The input port used to connect the AudioParam's stream to its node's stream
1.189 + nsRefPtr<MediaInputPort> mNodeStreamPort;
1.190 +};
1.191 +
1.192 +}
1.193 +}
1.194 +
1.195 +#endif
1.196 +
