Introduced logarithmic knob setting in DGL, added ZamEQ2

Signed-off-by: Damien Zammit <damien@zamaudio.com>

1 files changed, 148 insertions, 0 deletions

diff --git a/plugins/ZamEQ2/ZamEQ2Plugin.hpp b/plugins/ZamEQ2/ZamEQ2Plugin.hpp
new file mode 100644
index 0000000..4493121
--- /dev/null
+++ b/plugins/ZamEQ2/ZamEQ2Plugin.hpp
@@ -0,0 +1,148 @@
+/*
+ * ZamEQ2 2 band parametric equaliser 
+ * Copyright (C) 2014  Damien Zammit <damien@zamaudio.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * For a full copy of the GNU General Public License see the doc/GPL.txt file.
+ */
+
+#ifndef ZAMCOMPPLUGIN_HPP_INCLUDED
+#define ZAMCOMPPLUGIN_HPP_INCLUDED
+
+#include "DistrhoPlugin.hpp"
+
+START_NAMESPACE_DISTRHO
+
+// -----------------------------------------------------------------------
+
+class ZamEQ2Plugin : public Plugin
+{
+public:
+    enum Parameters
+    {
+        paramGain1 = 0,
+        paramQ1,
+        paramFreq1,
+        paramGain2,
+        paramQ2,
+        paramFreq2,
+        paramGainL,
+        paramFreqL,
+        paramGainH,
+        paramFreqH,
+        paramMaster,
+        paramTogglePeaks,
+        paramCount
+    };
+
+    ZamEQ2Plugin();
+    ~ZamEQ2Plugin() override;
+
+protected:
+    // -------------------------------------------------------------------
+    // Information
+
+    const char* d_getLabel() const noexcept override
+    {
+        return "ZamEQ2";
+    }
+
+    const char* d_getMaker() const noexcept override
+    {
+        return "Damien Zammit";
+    }
+
+    const char* d_getLicense() const noexcept override
+    {
+        return "GPL v2+";
+    }
+
+    uint32_t d_getVersion() const noexcept override
+    {
+        return 0x1000;
+    }
+
+    long d_getUniqueId() const noexcept override
+    {
+        return d_cconst('Z', 'E', 'Q', '2');
+    }
+
+    // -------------------------------------------------------------------
+    // Init
+
+    void d_initParameter(uint32_t index, Parameter& parameter) ;
+    void d_initProgramName(uint32_t index, d_string& programName) ;
+
+    // -------------------------------------------------------------------
+    // Internal data
+
+    float d_getParameterValue(uint32_t index) const override;
+    void  d_setParameterValue(uint32_t index, float value) override;
+    void  d_setProgram(uint32_t index) ;
+
+    // -------------------------------------------------------------------
+    // Process
+
+	static inline double
+	sanitize_denormal(double v) {
+	        if(!std::isnormal(v))
+	                return 0.f;
+	        return v;
+	}
+
+	static inline double
+	from_dB(double gdb) {
+	        return (exp(gdb/20.f*log(10.f)));
+	}
+
+	static inline double
+	to_dB(double g) {
+	        return (20.f*log10(g));
+	}
+
+	static inline int
+	sign(double x) {
+        	return (x >= 0.f ? 1 : -1);
+	}
+
+    void d_activate() override;
+    void d_deactivate() override;
+    void d_run(float** inputs, float** outputs, uint32_t frames) override;
+
+    void peq(double G0, double G, double GB, double w0, double Dw, 
+		double *a0, double *a1, double *a2, 
+		double *b0, double *b1, double *b2, double *gn);
+    void lowshelfeq(double G0, double G, double GB, 
+    		double w0, double Dw, double q, double B[], double A[]);
+    void highshelfeq(double G0, double G, double GB, 
+    		double w0, double Dw, double q, double B[], double A[]);
+    // -------------------------------------------------------------------
+
+private:
+    float gain1,q1,freq1,gain2,q2,freq2,gainl,freql,gainh,freqh,master,togglepeaks; //parameters
+        double x1,x2,y1,y2;
+        double x1a,x2a,y1a,y2a;
+        double zln1,zln2,zld1,zld2;
+        double zhn1,zhn2,zhd1,zhd2;
+        double a0x,a1x,a2x,b0x,b1x,b2x,gainx;
+        double a0y,a1y,a2y,b0y,b1y,b2y,gainy;
+        double Bl[3];
+        double Al[3];
+        double Bh[3];
+        double Ah[3];
+};
+
+// -----------------------------------------------------------------------
+
+END_NAMESPACE_DISTRHO
+
+#endif  // ZAMCOMP_HPP_INCLUDED