gecko-dev/content/media/webaudio/AudioParam.h

178 lines
5.0 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 AudioParam_h_
#define AudioParam_h_
#include "AudioParamTimeline.h"
#include "nsWrapperCache.h"
#include "nsCycleCollectionParticipant.h"
#include "nsCOMPtr.h"
#include "EnableWebAudioCheck.h"
#include "nsAutoPtr.h"
#include "AudioNode.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/Util.h"
#include "WebAudioUtils.h"
struct JSContext;
class nsIDOMWindow;
namespace mozilla {
namespace dom {
class AudioParam MOZ_FINAL : public nsWrapperCache,
public EnableWebAudioCheck,
public AudioParamTimeline
{
public:
typedef void (*CallbackType)(AudioNode*);
AudioParam(AudioNode* aNode,
CallbackType aCallback,
float aDefaultValue);
virtual ~AudioParam();
NS_IMETHOD_(nsrefcnt) AddRef(void);
NS_IMETHOD_(nsrefcnt) Release(void);
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(AudioParam)
AudioContext* GetParentObject() const
{
return mNode->Context();
}
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aScope) MOZ_OVERRIDE;
// We override SetValueCurveAtTime to convert the Float32Array to the wrapper
// object.
void SetValueCurveAtTime(const Float32Array& aValues, double aStartTime, double aDuration, ErrorResult& aRv)
{
if (!WebAudioUtils::IsTimeValid(aStartTime)) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
AudioParamTimeline::SetValueCurveAtTime(aValues.Data(), aValues.Length(),
aStartTime, aDuration, aRv);
mCallback(mNode);
}
// We override the rest of the mutating AudioParamTimeline methods in order to make
// sure that the callback is called every time that this object gets mutated.
void SetValue(float aValue)
{
// Optimize away setting the same value on an AudioParam
if (HasSimpleValue() &&
WebAudioUtils::FuzzyEqual(GetValue(), aValue)) {
return;
}
AudioParamTimeline::SetValue(aValue);
mCallback(mNode);
}
void SetValueAtTime(float aValue, double aStartTime, ErrorResult& aRv)
{
if (!WebAudioUtils::IsTimeValid(aStartTime)) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
AudioParamTimeline::SetValueAtTime(aValue, aStartTime, aRv);
mCallback(mNode);
}
void LinearRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
{
if (!WebAudioUtils::IsTimeValid(aEndTime)) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
AudioParamTimeline::LinearRampToValueAtTime(aValue, aEndTime, aRv);
mCallback(mNode);
}
void ExponentialRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
{
if (!WebAudioUtils::IsTimeValid(aEndTime)) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
AudioParamTimeline::ExponentialRampToValueAtTime(aValue, aEndTime, aRv);
mCallback(mNode);
}
void SetTargetAtTime(float aTarget, double aStartTime, double aTimeConstant, ErrorResult& aRv)
{
if (!WebAudioUtils::IsTimeValid(aStartTime) ||
!WebAudioUtils::IsTimeValid(aTimeConstant)) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
AudioParamTimeline::SetTargetAtTime(aTarget, aStartTime, aTimeConstant, aRv);
mCallback(mNode);
}
void SetTargetValueAtTime(float aTarget, double aStartTime, double aTimeConstant, ErrorResult& aRv)
{
SetTargetAtTime(aTarget, aStartTime, aTimeConstant, aRv);
}
void CancelScheduledValues(double aStartTime, ErrorResult& aRv)
{
if (!WebAudioUtils::IsTimeValid(aStartTime)) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
AudioParamTimeline::CancelScheduledValues(aStartTime);
mCallback(mNode);
}
float DefaultValue() const
{
return mDefaultValue;
}
AudioNode* Node() const
{
return mNode;
}
const nsTArray<AudioNode::InputNode>& InputNodes() const
{
return mInputNodes;
}
void RemoveInputNode(uint32_t aIndex)
{
mInputNodes.RemoveElementAt(aIndex);
}
AudioNode::InputNode* AppendInputNode()
{
return mInputNodes.AppendElement();
}
void DisconnectFromGraphAndDestroyStream();
// May create the stream if it doesn't exist
MediaStream* Stream();
protected:
nsCycleCollectingAutoRefCnt mRefCnt;
NS_DECL_OWNINGTHREAD
private:
nsRefPtr<AudioNode> mNode;
// For every InputNode, there is a corresponding entry in mOutputParams of the
// InputNode's mInputNode.
nsTArray<AudioNode::InputNode> mInputNodes;
CallbackType mCallback;
const float mDefaultValue;
// The input port used to connect the AudioParam's stream to its node's stream
nsRefPtr<MediaInputPort> mNodeStreamPort;
};
}
}
#endif