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Bug 836076 - Part 4: Move AudioEventTimeline::Event outside of AudioEventTimeline to be able to specialize its template members; r=roc
This commit is contained in:
Ehsan Akhgari
parent
e750316a3c
commit
b790243c8c
@ -18,6 +18,58 @@ namespace mozilla {
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namespace dom {
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// This is an internal helper class and should not be used outside of this header.
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struct AudioTimelineEvent {
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enum Type MOZ_ENUM_TYPE(uint32_t) {
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SetValue,
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LinearRamp,
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ExponentialRamp,
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SetTarget,
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SetValueCurve
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};
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AudioTimelineEvent(Type aType, double aTime, float aValue, double aTimeConstant = 0.0,
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float aDuration = 0.0, float* aCurve = nullptr, uint32_t aCurveLength = 0)
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: mType(aType)
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, mTimeConstant(aTimeConstant)
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, mDuration(aDuration)
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{
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if (aType == AudioTimelineEvent::SetValueCurve) {
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mCurve = aCurve;
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mCurveLength = aCurveLength;
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} else {
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mValue = aValue;
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mTime = aTime;
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}
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}
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bool IsValid() const
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{
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return IsValid(mTime) &&
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IsValid(mValue) &&
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IsValid(mTimeConstant) &&
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IsValid(mDuration);
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}
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Type mType;
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union {
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float mValue;
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uint32_t mCurveLength;
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};
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union {
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double mTime;
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float* mCurve;
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};
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double mTimeConstant;
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double mDuration;
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private:
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static bool IsValid(double value)
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{
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return MOZ_DOUBLE_IS_FINITE(value);
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}
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};
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/**
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* This class will be instantiated with different template arguments for testing and
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* production code.
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@ -28,58 +80,6 @@ namespace dom {
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template <class ErrorResult>
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class AudioEventTimeline
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{
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private:
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struct Event {
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enum Type MOZ_ENUM_TYPE(uint32_t) {
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SetValue,
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LinearRamp,
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ExponentialRamp,
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SetTarget,
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SetValueCurve
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};
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Event(Type aType, double aTime, float aValue, double aTimeConstant = 0.0,
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float aDuration = 0.0, float* aCurve = nullptr, uint32_t aCurveLength = 0)
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: mType(aType)
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, mTimeConstant(aTimeConstant)
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, mDuration(aDuration)
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{
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if (aType == Event::SetValueCurve) {
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mCurve = aCurve;
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mCurveLength = aCurveLength;
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} else {
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mValue = aValue;
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mTime = aTime;
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}
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}
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bool IsValid() const
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{
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return IsValid(mTime) &&
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IsValid(mValue) &&
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IsValid(mTimeConstant) &&
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IsValid(mDuration);
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}
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Type mType;
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union {
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float mValue;
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uint32_t mCurveLength;
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};
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union {
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double mTime;
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float* mCurve;
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};
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double mTimeConstant;
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double mDuration;
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private:
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static bool IsValid(double value)
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{
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return MOZ_DOUBLE_IS_FINITE(value);
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}
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};
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public:
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explicit AudioEventTimeline(float aDefaultValue)
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: mValue(aDefaultValue)
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@ -108,29 +108,29 @@ public:
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void SetValueAtTime(float aValue, double aStartTime, ErrorResult& aRv)
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{
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InsertEvent(Event(Event::SetValue, aStartTime, aValue), aRv);
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InsertEvent(AudioTimelineEvent(AudioTimelineEvent::SetValue, aStartTime, aValue), aRv);
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}
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void LinearRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
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{
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InsertEvent(Event(Event::LinearRamp, aEndTime, aValue), aRv);
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InsertEvent(AudioTimelineEvent(AudioTimelineEvent::LinearRamp, aEndTime, aValue), aRv);
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}
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void ExponentialRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
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{
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InsertEvent(Event(Event::ExponentialRamp, aEndTime, aValue), aRv);
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InsertEvent(AudioTimelineEvent(AudioTimelineEvent::ExponentialRamp, aEndTime, aValue), aRv);
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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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InsertEvent(Event(Event::SetTarget, aStartTime, aTarget, aTimeConstant), aRv);
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InsertEvent(AudioTimelineEvent(AudioTimelineEvent::SetTarget, aStartTime, aTarget, aTimeConstant), aRv);
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}
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void SetValueCurveAtTime(const float* aValues, uint32_t aValuesLength, double aStartTime, double aDuration, ErrorResult& aRv)
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{
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// TODO: implement
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// Note that we will need to copy the buffer here.
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// InsertEvent(Event(Event::SetValueCurve, aStartTime, 0.0f, 0.0f, aDuration, aValues, aValuesLength), aRv);
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// InsertEvent(AudioTimelineEvent(AudioTimelineEvent::SetValueCurve, aStartTime, 0.0f, 0.0f, aDuration, aValues, aValuesLength), aRv);
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}
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void CancelScheduledValues(double aStartTime)
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@ -153,16 +153,16 @@ public:
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// This method computes the AudioParam value at a given time based on the event timeline
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float GetValueAtTime(double aTime) const
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{
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const Event* previous = nullptr;
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const Event* next = nullptr;
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const AudioTimelineEvent* previous = nullptr;
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const AudioTimelineEvent* next = nullptr;
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bool bailOut = false;
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for (unsigned i = 0; !bailOut && i < mEvents.Length(); ++i) {
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switch (mEvents[i].mType) {
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case Event::SetValue:
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case Event::SetTarget:
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case Event::LinearRamp:
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case Event::ExponentialRamp:
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case AudioTimelineEvent::SetValue:
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case AudioTimelineEvent::SetTarget:
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case AudioTimelineEvent::LinearRamp:
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case AudioTimelineEvent::ExponentialRamp:
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if (aTime == mEvents[i].mTime) {
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// Find the last event with the same time
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do {
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@ -177,7 +177,7 @@ public:
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bailOut = true;
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}
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break;
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case Event::SetValueCurve:
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case AudioTimelineEvent::SetValueCurve:
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// TODO: implement
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break;
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default:
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@ -198,17 +198,17 @@ public:
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// If the requested time is before all of the existing events
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if (!previous) {
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switch (next->mType) {
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case Event::SetValue:
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case Event::SetTarget:
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case AudioTimelineEvent::SetValue:
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case AudioTimelineEvent::SetTarget:
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// The requested time is before the first event
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return mValue;
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case Event::LinearRamp:
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case AudioTimelineEvent::LinearRamp:
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// Use t=0 as T0 and v=defaultValue as V0
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return LinearInterpolate(0.0, mValue, next->mTime, next->mValue, aTime);
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case Event::ExponentialRamp:
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case AudioTimelineEvent::ExponentialRamp:
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// Use t=0 as T0 and v=defaultValue as V0
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return ExponentialInterpolate(0.0, mValue, next->mTime, next->mValue, aTime);
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case Event::SetValueCurve:
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case AudioTimelineEvent::SetValueCurve:
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// TODO: implement
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return 0.0f;
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}
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@ -216,7 +216,7 @@ public:
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}
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// SetTarget nodes can be handled no matter what their next node is (if they have one)
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if (previous->mType == Event::SetTarget) {
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if (previous->mType == AudioTimelineEvent::SetTarget) {
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// Follow the curve, without regard to the next node
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return ExponentialApproach(previous->mTime, mValue, previous->mValue,
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previous->mTimeConstant, aTime);
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@ -225,15 +225,15 @@ public:
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// If the requested time is after all of the existing events
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if (!next) {
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switch (previous->mType) {
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case Event::SetValue:
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case Event::LinearRamp:
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case Event::ExponentialRamp:
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case AudioTimelineEvent::SetValue:
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case AudioTimelineEvent::LinearRamp:
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case AudioTimelineEvent::ExponentialRamp:
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// The value will be constant after the last event
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return previous->mValue;
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case Event::SetValueCurve:
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case AudioTimelineEvent::SetValueCurve:
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// TODO: implement
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return 0.0f;
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case Event::SetTarget:
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case AudioTimelineEvent::SetTarget:
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MOZ_ASSERT(false, "unreached");
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}
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MOZ_ASSERT(false, "unreached");
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@ -243,28 +243,28 @@ public:
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// First, handle the case where our range ends up in a ramp event
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switch (next->mType) {
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case Event::LinearRamp:
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case AudioTimelineEvent::LinearRamp:
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return LinearInterpolate(previous->mTime, previous->mValue, next->mTime, next->mValue, aTime);
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case Event::ExponentialRamp:
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case AudioTimelineEvent::ExponentialRamp:
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return ExponentialInterpolate(previous->mTime, previous->mValue, next->mTime, next->mValue, aTime);
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case Event::SetValue:
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case Event::SetTarget:
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case Event::SetValueCurve:
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case AudioTimelineEvent::SetValue:
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case AudioTimelineEvent::SetTarget:
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case AudioTimelineEvent::SetValueCurve:
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break;
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}
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// Now handle all other cases
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switch (previous->mType) {
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case Event::SetValue:
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case Event::LinearRamp:
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case Event::ExponentialRamp:
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case AudioTimelineEvent::SetValue:
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case AudioTimelineEvent::LinearRamp:
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case AudioTimelineEvent::ExponentialRamp:
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// If the next event type is neither linear or exponential ramp, the
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// value is constant.
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return previous->mValue;
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case Event::SetValueCurve:
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case AudioTimelineEvent::SetValueCurve:
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// TODO: implement
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return 0.0f;
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case Event::SetTarget:
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case AudioTimelineEvent::SetTarget:
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MOZ_ASSERT(false, "unreached");
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}
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@ -294,18 +294,18 @@ public:
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}
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private:
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const Event* GetPreviousEvent(double aTime) const
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const AudioTimelineEvent* GetPreviousEvent(double aTime) const
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{
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const Event* previous = nullptr;
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const Event* next = nullptr;
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const AudioTimelineEvent* previous = nullptr;
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const AudioTimelineEvent* next = nullptr;
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bool bailOut = false;
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for (unsigned i = 0; !bailOut && i < mEvents.Length(); ++i) {
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switch (mEvents[i].mType) {
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case Event::SetValue:
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case Event::SetTarget:
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case Event::LinearRamp:
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case Event::ExponentialRamp:
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case AudioTimelineEvent::SetValue:
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case AudioTimelineEvent::SetTarget:
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case AudioTimelineEvent::LinearRamp:
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case AudioTimelineEvent::ExponentialRamp:
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if (aTime == mEvents[i].mTime) {
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// Find the last event with the same time
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do {
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@ -320,7 +320,7 @@ private:
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bailOut = true;
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}
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break;
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case Event::SetValueCurve:
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case AudioTimelineEvent::SetValueCurve:
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// TODO: implement
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break;
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default:
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@ -335,7 +335,7 @@ private:
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return previous;
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}
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void InsertEvent(const Event& aEvent, ErrorResult& aRv)
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void InsertEvent(const AudioTimelineEvent& aEvent, ErrorResult& aRv)
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{
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if (!aEvent.IsValid()) {
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aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
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@ -345,7 +345,7 @@ private:
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// Make sure that non-curve events don't fall within the duration of a
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// curve event.
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for (unsigned i = 0; i < mEvents.Length(); ++i) {
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if (mEvents[i].mType == Event::SetValueCurve &&
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if (mEvents[i].mType == AudioTimelineEvent::SetValueCurve &&
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mEvents[i].mTime <= aEvent.mTime &&
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(mEvents[i].mTime + mEvents[i].mDuration) >= aEvent.mTime) {
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aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
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@ -355,7 +355,7 @@ private:
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// Make sure that curve events don't fall in a range which includes other
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// events.
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if (aEvent.mType == Event::SetValueCurve) {
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if (aEvent.mType == AudioTimelineEvent::SetValueCurve) {
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for (unsigned i = 0; i < mEvents.Length(); ++i) {
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if (mEvents[i].mTime >= aEvent.mTime &&
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mEvents[i].mTime <= (aEvent.mTime + aEvent.mDuration)) {
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@ -366,12 +366,12 @@ private:
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}
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// Make sure that invalid values are not used for exponential curves
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if (aEvent.mType == Event::ExponentialRamp) {
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if (aEvent.mType == AudioTimelineEvent::ExponentialRamp) {
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if (aEvent.mValue <= 0.f) {
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aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
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return;
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}
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const Event* previousEvent = GetPreviousEvent(aEvent.mTime);
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const AudioTimelineEvent* previousEvent = GetPreviousEvent(aEvent.mTime);
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if (previousEvent) {
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if (previousEvent->mValue <= 0.f) {
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aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
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@ -418,7 +418,7 @@ private:
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// and that is the reason why we're using a simple array as the data structure.
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// We can optimize this in the future if the performance of the array ends up
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// being a bottleneck.
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nsTArray<Event> mEvents;
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nsTArray<AudioTimelineEvent> mEvents;
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float mValue;
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};
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