[JayDelay]

- added param scaler
2025-11-12 22:45:13 +01:00
parent 389f2c0556
commit 47e459809e
3 changed files with 252 additions and 63 deletions
@@ -0,0 +1,205 @@
+#include <sys/types.h>
+#include <string>
+#include <cmath>
+
+class Param
+{
+	std::string m_name;
+	std::string m_unit;
+	typedef struct _sparam_info_t
+	{
+		double pmin, pmax, pvalue, pinterval, pcenter, scenter, base, kexp;
+
+	} param_info_t;
+	
+	param_info_t m_param_info;
+
+	public:
+
+
+	Param(
+		std::string name,
+		std::string unit,
+		double pmin,
+		double pmax,
+		double pvalue,
+		double pinterval=1.0,
+		double pcenter=-1.0,
+		double scenter=0.0,
+		double base=1.0,
+		double kexp=1.0
+	)
+	: m_name(name)
+	, m_param_info({pmin, pmax, pvalue, pinterval, pcenter, scenter, base, kexp})
+	{
+
+	}
+
+	std::string name()
+	{
+		return m_name;
+	}
+
+	std::string unit()
+	{
+		return m_unit;
+	}
+
+	double getParameter()
+	{
+		return m_param_info.pvalue;
+	}
+
+	void setParameter(double p)
+	{
+		m_param_info.pvalue = p;
+	}
+
+	double getSlider()
+	{
+		return toSlider();
+	}
+	
+	// --------------------------------------------------------------
+	// Exported functions
+	// --------------------------------------------------------------
+	double quantizeParam(double p)
+	{
+		double k, pq;
+		if (m_param_info.pinterval == 0)
+		{
+			return p;
+		}
+
+		k = (double)1/(m_param_info.pinterval - 0);
+
+		if (p < 0)
+		{
+			pq = ((int)(p*k - 0.5))*m_param_info.pinterval;
+		}
+		else
+		{
+			pq = ((int)(p*k + 0.5))*m_param_info.pinterval;
+		}
+
+		return pq;
+	}
+
+	double clampParam(double p)
+	{
+		return (double)std::min(m_param_info.pmax, std::max(m_param_info.pmin, quantizeParam(p)));
+	}
+
+	double fromSlider(double s)
+	{
+		double p, pcenter;
+		double pmax, pmin, base, kexp, scenter;
+
+		pmax = m_param_info.pmax;
+		pmin = m_param_info.pmin;
+		if (pmin == pmax)
+		{
+			pmax += 1E-9;
+		}
+		base = m_param_info.base;
+		kexp = m_param_info.kexp;
+		if (kexp == 0)
+		{
+			kexp = 1E-9;
+		}
+		scenter = m_param_info.scenter;
+		pcenter = m_param_info.pcenter;
+
+		if ((pcenter < pmin) || (pcenter > pmax))
+			pcenter = pmax*scenter + pmin*(1-scenter);
+
+		s = (double)std::min(1.0, std::max(0.0, s));
+		if (s < scenter)
+		{
+			if (base == 1)
+			{
+				// pcenter-(pcenter-pmin)*(scenter-s)/scenter;
+				p = pcenter-(pcenter-pmin)*(scenter-s)/scenter;
+			}
+			else
+			{
+				// pcenter-(pcenter-pmin)*(B^(k*(scenter-s)/scenter)-1)/(B^k-1);
+				p = pcenter-(pcenter-pmin)*(pow(base,kexp*(scenter-s)/scenter)-1)/(pow(base,kexp)-1);
+			}
+		}
+		else
+		{
+			if (base == 1)
+			{
+				// pcenter+(pmax-pcenter)*(-scenter+s)/(1-scenter);
+				p = pcenter+(pmax-pcenter)*(-scenter+s)/(1-scenter);
+			}
+			else
+			{
+				// pcenter+(pmax-pcenter)*(B^(k*(-scenter+s)/(1-scenter))-1)/(B^k-1);
+				p = pcenter+(pmax-pcenter)*(pow(base,kexp*(-scenter+s)/(1-scenter))-1)/(pow(base,kexp)-1);
+			}
+		}
+
+		m_param_info.pvalue = p;
+		return quantizeParam(p);
+	}
+
+	double toSlider()
+	{
+		double p = m_param_info.pvalue;
+
+		double s, pcenter;
+		double pmax, pmin, base, kexp, scenter;
+
+		pmax = m_param_info.pmax;
+		pmin = m_param_info.pmin;
+		if (pmin == pmax)
+		{
+			pmax += 1E-9;
+		}
+		base = m_param_info.base;
+		kexp = m_param_info.kexp;
+		if (kexp == 0)
+		{
+			kexp = 1E-9;
+		}
+		scenter = m_param_info.scenter;
+		pcenter = m_param_info.pcenter;
+
+		if ((pcenter < pmin) || (pcenter > pmax))
+		{
+			pcenter = pmax*scenter + pmin*(1-scenter);
+		}
+
+		p = clampParam(p);
+		if (p < pcenter)
+		{
+			if (base == 1)
+			{
+				// (-pmin+p)*scenter/(pcenter-pmin);
+				s = (-pmin+p)*scenter/(pcenter-pmin);
+			}
+			else
+			{
+				// scenter*(log(B)*k-log(-(-pcenter*B^k+pmin+p*B^k-p)/(pcenter-pmin)))/log(B)/k;
+				s = scenter*(log(base)*kexp-log(-(-pcenter*pow(base,kexp)+pmin+p*pow(base,kexp)-p)/(pcenter-pmin)))/log(base)/kexp;
+			}
+		}
+		else
+		{
+			if (base == 1)
+			{
+				// (pcenter-scenter*pmax-p+scenter*p)/(-pmax+pcenter);
+				s = (pcenter-scenter*pmax-p+scenter*p)/(-pmax+pcenter);
+			}
+			else
+			{
+				// (k*log(B)*scenter+log(-(-pcenter*B^k+pmax+p*B^k-p)/(-pmax+pcenter))-log(-(-pcenter*B^k+pmax+p*B^k-p)/(-pmax+pcenter))*scenter)/log(B)/k;
+				s = (kexp*log(base)*scenter+log(-(-pcenter*pow(base,kexp)+pmax+p*pow(base,kexp)-p)/(-pmax+pcenter))-log(-(-pcenter*pow(base,kexp)+pmax+p*pow(base,kexp)-p)/(-pmax+pcenter))*scenter)/log(base)/kexp;
+			}
+		}
+
+		return s;
+	}
+};