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#define __LS_SIGNALUNIT_H__ |
#define __LS_SIGNALUNIT_H__ |
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#include "../../common/ArrayList.h" |
#include "../../common/ArrayList.h" |
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#include "../../common/Pool.h" |
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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; |
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/** |
/** |
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* A signal unit consist of internal signal generator (like envelope generator, |
* A signal unit consist of internal signal generator (like envelope generator, |
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* low frequency oscillator, etc) with a number of generator parameters which |
* low frequency oscillator, etc) with a number of generator parameters which |
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Parameter(const Parameter& Prm) { Copy(Prm); } |
Parameter(const Parameter& Prm) { Copy(Prm); } |
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void operator=(const Parameter& Prm) { Copy(Prm); } |
void operator=(const Parameter& Prm) { Copy(Prm); } |
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virtual void Copy(const Parameter& Prm) { |
void Copy(const Parameter& Prm) { |
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if (this == &Prm) return; |
if (this == &Prm) return; |
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pUnit = Prm.pUnit; |
pUnit = Prm.pUnit; |
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public: |
public: |
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ArrayList<SignalUnit::Parameter> Params; // The list of parameters which are modulating the signal unit |
ArrayList<SignalUnit::Parameter> Params; // The list of parameters which are modulating the signal unit |
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SignalUnit() : bActive(false), Level(0.0f), bCalculating(false), uiDelayTrigger(0) { } |
SignalUnit(SignalUnitRack* rack): pRack(rack), bActive(false), Level(0.0f), bCalculating(false), uiDelayTrigger(0) { } |
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SignalUnit(const SignalUnit& Unit) { Copy(Unit); } |
SignalUnit(const SignalUnit& Unit): pRack(Unit.pRack) { Copy(Unit); } |
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void operator=(const SignalUnit& Unit) { Copy(Unit); } |
void operator=(const SignalUnit& Unit) { Copy(Unit); } |
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virtual ~SignalUnit() { } |
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virtual void Copy(const SignalUnit& Unit) { |
void Copy(const SignalUnit& Unit) { |
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if (this == &Unit) return; |
if (this == &Unit) return; |
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bActive = Unit.bActive; |
bActive = Unit.bActive; |
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*/ |
*/ |
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virtual uint DelayTrigger() { return uiDelayTrigger; } |
virtual uint DelayTrigger() { return uiDelayTrigger; } |
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/** |
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* A helper method which checks whether the delay |
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* stage is finished. |
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*/ |
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bool DelayStage(); |
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protected: |
protected: |
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SignalUnitRack* const pRack; |
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bool bActive; /* Don't use it to check the active state of the unit!!! |
bool bActive; /* Don't use it to check the active state of the unit!!! |
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* Use Active() instead! */ |
* Use Active() instead! */ |
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float Level; |
float Level; |
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}; |
}; |
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class EndpointSignalUnit: virtual public SignalUnit { |
class EndpointSignalUnit: public SignalUnit { |
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public: |
public: |
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EndpointSignalUnit(SignalUnitRack* rack): SignalUnit(rack) { } |
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/** |
/** |
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* Gets the volume modulation value |
* Gets the volume modulation value |
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* for the current time step (sample point). |
* for the current time step (sample point). |
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*/ |
*/ |
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virtual float GetResonance() = 0; |
virtual float GetResonance() = 0; |
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virtual float CalculateFilterCutoff(float cutoff) = 0; |
/** Should return value in the range [-100, 100] (L <-> R) */ |
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virtual float GetPan() = 0; |
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virtual float CalculatePitch(float pitch) = 0; |
virtual float CalculateFilterCutoff(float cutoff) { |
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cutoff *= GetFilterCutoff(); |
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return cutoff > 13500 ? 13500 : cutoff; |
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} |
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virtual float CalculateResonance(float res) = 0; |
virtual float CalculatePitch(float pitch) { |
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}; |
return GetPitch() * pitch; |
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} |
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class SignalUnitRack; |
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template <class O /* The signal unit's owner */> |
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class SignalUnitBase: virtual public SignalUnit { |
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public: |
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SignalUnitBase() : pOwner(NULL) { } |
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SignalUnitBase(const SignalUnitBase& Unit) { Copy(Unit); } |
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void operator=(const SignalUnitBase& Unit) { Copy(Unit); } |
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virtual void Copy(const SignalUnitBase& Unit) { |
virtual float CalculateResonance(float res) { |
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if (this == &Unit) return; |
return GetResonance() * res; |
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pOwner = Unit.pOwner; |
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SignalUnit::Copy(Unit); |
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} |
} |
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/** Should return value in the range [0, 127] (L <-> R) */ |
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virtual uint8_t CaluclatePan(uint8_t pan) { |
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int p = pan + GetPan() * 0.63; |
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if (p < 0) return 0; |
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if (p > 127) return 127; |
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return p; |
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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: |
protected: |
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O* pOwner; // The owner to which this rack belongs. |
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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SignalUnitRack* GetSignalUnitRack() { return pOwner->GetSignalUnitRack(); } |
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public: |
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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* The owner of the unit is set by the rack |
* Set the current value, which the smoother will not smooth out. |
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* just before the call to the unit's trigger method. |
* If you want the value to be smoothen out, use update() instead. |
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*/ |
*/ |
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void SetOwner(O* Owner) { pOwner = Owner; } |
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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* A helper method which checks whether the delay |
* Sets a new value. The render function will return |
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* stage is finished. |
* values gradually approaching this value. |
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*/ |
*/ |
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bool DelayStage() { |
void update(uint8_t val) { |
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return (DelayTrigger() >= GetSignalUnitRack()->GetCurrentStep()); |
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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template<class O> |
class CCSignalUnit: public SignalUnit { |
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class CCSignalUnit: public SignalUnitBase<O> { |
public: |
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private: |
/** Listener which will be notified when the level of the unit is changed. */ |
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uint8_t Ctrl; // The number of the MIDI controller which modulates this signal unit. |
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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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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protected: |
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RTList<CC>* pCtrls; // 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: |
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CCSignalUnit(uint8_t Controller) { |
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Ctrl = Controller; |
CCSignalUnit(SignalUnitRack* rack, Listener* l = NULL): SignalUnit(rack), pCtrls(NULL) { |
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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) { Copy(Unit); } |
CCSignalUnit(const CCSignalUnit& Unit): SignalUnit(Unit.pRack), pCtrls(NULL) { Copy(Unit); } |
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void operator=(const CCSignalUnit& Unit) { Copy(Unit); } |
void operator=(const CCSignalUnit& Unit) { Copy(Unit); } |
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virtual void Copy(const CCSignalUnit& Unit) { |
virtual ~CCSignalUnit() { |
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SignalUnitBase<O>::Copy(Unit); |
if (pCtrls != NULL) delete pCtrls; |
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Ctrl = Unit.Ctrl; |
} |
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void Copy(const CCSignalUnit& Unit) { |
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if (pCtrls != NULL) delete pCtrls; |
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pCtrls = new RTList<CC>(*(Unit.pCtrls)); |
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if (pCtrls->poolIsEmpty() && pCtrls->count() < Unit.pCtrls->count()) { |
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std::cerr << "Maximum number of CC reached!" << std::endl; |
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} |
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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); |
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} |
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virtual void InitCCList(Pool<CC>* pCCPool, Pool<Smoother>* pSmootherPool) { |
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if (pCtrls != NULL) delete pCtrls; |
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pCtrls = new RTList<CC>(pCCPool); |
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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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if(pCtrls->poolIsEmpty()) { |
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std::cerr << "Maximum number of CC reached!" << std::endl; |
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return; |
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} |
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*(pCtrls->allocAppend()) = CC(Controller, Influence, Curve, pSmoother); |
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if (pSmoother != NULL) hasSmoothCtrls = true; |
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} |
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virtual void RemoveAllCCs() { pCtrls->clear(); } |
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int GetCCCount() { return pCtrls->count(); } |
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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] |
RTList<CC>::Iterator ctrl = pCtrls->first(); |
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SignalUnitBase<O>::Level = 2 * Value; |
RTList<CC>::Iterator end = pCtrls->end(); |
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SignalUnitBase<O>::Level = SignalUnitBase<O>::Level/127.0f - 1.0f; |
for(; ctrl != end; ++ctrl) { |
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if (Controller != (*ctrl).Controller) continue; |
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if ((*ctrl).Value == Value) continue; |
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(*ctrl).Value = Value; |
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if ((*ctrl).pSmoother != NULL) (*ctrl).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 (!SignalUnitBase<O>::bActive) SignalUnitBase<O>::bActive = true; |
if (!(hasSmoothCtrls && isSmoothingOut) && recalculate) Calculate(); |
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} |
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}; |
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/** |
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* Endpoint signal unit. |
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*/ |
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template<class O> |
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class EndpointSignalUnitBase : public SignalUnitBase<O>, public EndpointSignalUnit { |
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public: |
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virtual float CalculateFilterCutoff(float cutoff) { |
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cutoff *= GetFilterCutoff(); |
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return cutoff > 13500 ? 13500 : cutoff; |
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} |
} |
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virtual float CalculatePitch(float pitch) { |
virtual void Calculate() { |
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return GetPitch() * pitch; |
float l = 0; |
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isSmoothingOut = false; |
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RTList<CC>::Iterator ctrl = pCtrls->first(); |
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RTList<CC>::Iterator end = pCtrls->end(); |
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for(; ctrl != end; ++ctrl) { |
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if ((*ctrl).pSmoother == NULL) { |
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l += Normalize((*ctrl).Value, (*ctrl).Curve) * (*ctrl).Influence; |
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} else { |
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if ((*ctrl).pSmoother->isSmoothingOut()) isSmoothingOut = true; |
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l += Normalize((*ctrl).pSmoother->render(), (*ctrl).Curve) * (*ctrl).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 CalculateResonance(float res) { |
virtual float Normalize(uint8_t val, short int curve = -1) { |
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return GetResonance() * res; |
return val / 127.0f; |
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} |
} |
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}; |
}; |
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