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/***************************************************************************
softtakeover.h - description
--------------
begin : Thu Mar 17 2011
copyright : (C) 2011 by Sean M. Pappalardo
email : spappalardo@mixxx.org
***************************************************************************/
#ifndef SOFTTAKEOVER_H
#define SOFTTAKEOVER_H
#include <QHash>
class ControlObject;
// 3/128 units away from the current is enough to catch fast non-sequential moves
// but not cause an audibly noticeable jump.
class SoftTakeover {
public:
static const double kDefaultTakeoverThreshold;
SoftTakeover();
bool ignore(ControlObject* control, double newParameter);
void ignoreNext();
void setThreshold(double threshold);
struct TestAccess;
private:
// If a new value is received within this amount of time, jump to it
// regardless. This allows quickly whipping controls to work while retaining
// the benefits of soft-takeover for slower movements. Setting this too
// high will defeat the purpose of soft-takeover.
static const qint64 SUBSEQUENT_VALUE_OVERRIDE_TIME_MILLIS = 50;
qint64 m_time;
double m_prevParameter;
double m_dThreshold;
};
struct SoftTakeover::TestAccess {
static qint64 getTimeThreshold() {
return SUBSEQUENT_VALUE_OVERRIDE_TIME_MILLIS;
}
};
class SoftTakeoverCtrl {
public:
SoftTakeoverCtrl();
~SoftTakeoverCtrl();
// Enable soft-takeover for the given Control.
// This does nothing on a control that already has soft-takeover enabled.
void enable(ControlObject* control);
// Disable soft-takeover for the given Control
void disable(ControlObject* control);
// Check to see if the new value for the Control should be ignored
bool ignore(ControlObject* control, double newMidiParameter);
private:
QHash<ControlObject*, SoftTakeover*> m_softTakeoverHash;
};
#endif
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