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namespace LinuxSampler { |
namespace LinuxSampler { |
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template<typename T> |
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class FixedArray { |
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public: |
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FixedArray(int capacity) { |
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iSize = 0; |
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iCapacity = capacity; |
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pData = new T[iCapacity]; |
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} |
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~FixedArray() { |
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delete pData; |
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pData = NULL; |
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} |
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inline int size() const { return iSize; } |
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inline int capacity() { return iCapacity; } |
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void add(T element) { |
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if (iSize >= iCapacity) throw Exception("Array out of bounds"); |
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pData[iSize++] = element; |
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} |
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T increment() { |
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if (iSize >= iCapacity) throw Exception("Array out of bounds"); |
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return pData[iSize++]; |
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} |
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void clear() { iSize = 0; } |
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void copy(const FixedArray<T>& array) { |
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if(array.size() >= capacity()) throw Exception("Not enough space to copy array"); |
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for (int i = 0; i < array.size(); i++) pData[i] = array[i]; |
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iSize = array.size(); |
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} |
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inline T& operator[](int idx) const { |
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return pData[idx]; |
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} |
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private: |
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T* pData; |
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int iSize; |
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int iCapacity; |
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}; |
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class SignalUnitRack; |
class SignalUnitRack; |
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/** |
/** |
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}; |
}; |
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/** |
/** |
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* Used to smooth out the parameter changes. |
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*/ |
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class Smoother { |
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protected: |
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uint timeSteps; // The number of time steps to reach the goal |
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uint currentTimeStep; |
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uint8_t goal; // 0 - 127 |
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uint8_t prev; // 0 - 127 |
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public: |
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/** |
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* |
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* @param time The time (in seconds) to reach the goal |
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* @param sampleRate |
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* @param val The initial value |
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*/ |
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void trigger(float time, float sampleRate, uint8_t val = 0) { |
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currentTimeStep = timeSteps = time * sampleRate; |
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prev = goal = val; |
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} |
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/** |
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* Set the current value, which the smoother will not smooth out. |
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* If you want the value to be smoothen out, use update() instead. |
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*/ |
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void setValue( uint8_t val) { |
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currentTimeStep = timeSteps; |
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prev = goal = val; |
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} |
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/** |
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* Sets a new value. The render function will return |
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* values gradually approaching this value. |
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*/ |
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void update(uint8_t val) { |
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if (val == goal) return; |
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prev = prev + (goal - prev) * (currentTimeStep / (float)timeSteps); |
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goal = val; |
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currentTimeStep = 0; |
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} |
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uint8_t render() { |
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if (currentTimeStep >= timeSteps) return goal; |
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return prev + (goal - prev) * (currentTimeStep++ / (float)timeSteps); |
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} |
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bool isSmoothingOut() { return currentTimeStep < timeSteps; } |
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}; |
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/** |
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* Continuous controller signal unit. |
* Continuous controller signal unit. |
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* The level of this unit corresponds to the controller changes |
* The level of this unit corresponds to the controllers changes |
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* and is normalized to be in the range from -1 to +1. |
* and their influences. |
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*/ |
*/ |
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class CCSignalUnit: public SignalUnit { |
class CCSignalUnit: public SignalUnit { |
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private: |
public: |
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uint8_t Ctrl; // The number of the MIDI controller which modulates this signal unit. |
/** Listener which will be notified when the level of the unit is changed. */ |
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class Listener { |
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public: |
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virtual void ValueChanged(CCSignalUnit* pUnit) = 0; |
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}; |
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protected: |
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class CC { |
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public: |
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uint8_t Controller; ///< MIDI controller number. |
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uint8_t Value; ///< Controller Value. |
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short int Curve; ///< specifies the curve type |
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float Influence; |
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Smoother* pSmoother; |
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CC(uint8_t Controller = 0, float Influence = 0.0f, short int Curve = -1, Smoother* pSmoother = NULL) { |
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this->Controller = Controller; |
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this->Value = 0; |
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this->Curve = Curve; |
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this->Influence = Influence; |
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this->pSmoother = pSmoother; |
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} |
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CC(const CC& cc) { Copy(cc); } |
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void operator=(const CC& cc) { Copy(cc); } |
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void Copy(const CC& cc) { |
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Controller = cc.Controller; |
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Value = cc.Value; |
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Influence = cc.Influence; |
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Curve = cc.Curve; |
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pSmoother = cc.pSmoother; |
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} |
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}; |
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FixedArray<CC> Ctrls; // The MIDI controllers which modulates this signal unit. |
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Listener* pListener; |
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bool hasSmoothCtrls; // determines whether there are smooth controllers (used for optimization) |
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bool isSmoothingOut; // determines whether there is a CC which is in process of smoothing out (used for optimization) |
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public: |
public: |
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CCSignalUnit(SignalUnitRack* rack, uint8_t Controller): SignalUnit(rack) { |
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Ctrl = Controller; |
CCSignalUnit(SignalUnitRack* rack, Listener* l = NULL): SignalUnit(rack), Ctrls(128) { |
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pListener = l; |
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hasSmoothCtrls = isSmoothingOut = false; |
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} |
} |
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CCSignalUnit(const CCSignalUnit& Unit): SignalUnit(Unit.pRack) { Copy(Unit); } |
CCSignalUnit(const CCSignalUnit& Unit): SignalUnit(Unit.pRack), Ctrls(128) { Copy(Unit); } |
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void operator=(const CCSignalUnit& Unit) { Copy(Unit); } |
void operator=(const CCSignalUnit& Unit) { Copy(Unit); } |
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void Copy(const CCSignalUnit& Unit) { |
void Copy(const CCSignalUnit& Unit) { |
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Ctrl = Unit.Ctrl; |
Ctrls.copy(Unit.Ctrls); |
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pListener = Unit.pListener; |
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hasSmoothCtrls = Unit.hasSmoothCtrls; |
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isSmoothingOut = Unit.isSmoothingOut; |
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SignalUnit::Copy(Unit); |
SignalUnit::Copy(Unit); |
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} |
} |
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virtual void Increment() { } |
void AddCC(uint8_t Controller, float Influence, short int Curve = -1, Smoother* pSmoother = NULL) { |
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Ctrls.add(CC(Controller, Influence, Curve, pSmoother)); |
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if (pSmoother != NULL) hasSmoothCtrls = true; |
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} |
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void RemoveAllCCs() { |
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Ctrls.clear(); |
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} |
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virtual void Increment() { |
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if (hasSmoothCtrls && isSmoothingOut) Calculate(); |
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} |
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virtual void Trigger() { |
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Calculate(); |
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bActive = Level != 0; |
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} |
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virtual void ProcessCCEvent(uint8_t Controller, uint8_t Value) { |
virtual void ProcessCCEvent(uint8_t Controller, uint8_t Value) { |
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if (Controller != Ctrl) return; |
bool recalculate = false; |
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// Normalize the value so it belongs to the interval [-1, +1] |
for (int i = 0; i < Ctrls.size(); i++) { |
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Level = 2 * Value; |
if (Controller != Ctrls[i].Controller) continue; |
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Level = Level/127.0f - 1.0f; |
if (Ctrls[i].Value == Value) continue; |
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Ctrls[i].Value = Value; |
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if (Ctrls[i].pSmoother != NULL) Ctrls[i].pSmoother->update(Value); |
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if (!bActive) bActive = true; |
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recalculate = true; |
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} |
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if (!bActive) bActive = true; |
if (!(hasSmoothCtrls && isSmoothingOut) && recalculate) Calculate(); |
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} |
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virtual void Calculate() { |
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float l = 0; |
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isSmoothingOut = false; |
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for (int i = 0; i < Ctrls.size(); i++) { |
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if (Ctrls[i].pSmoother == NULL) { |
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l += Normalize(Ctrls[i].Value, Ctrls[i].Curve) * Ctrls[i].Influence; |
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} else { |
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if (Ctrls[i].pSmoother->isSmoothingOut()) isSmoothingOut = true; |
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l += Normalize(Ctrls[i].pSmoother->render(), Ctrls[i].Curve) * Ctrls[i].Influence; |
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} |
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} |
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if (Level != l) { |
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Level = l; |
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if (pListener != NULL) pListener->ValueChanged(this); |
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} |
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} |
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virtual float Normalize(uint8_t val, short int curve = -1) { |
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return val / 127.0f; |
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} |
} |
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}; |
}; |
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