SoftGate

3 files changed, 356 insertions, 0 deletions

diff --git a/plugins/LinuxVST/src/SoftGate/SoftGate.cpp b/plugins/LinuxVST/src/SoftGate/SoftGate.cpp
new file mode 100755
index 0000000..aae0129
--- /dev/null
+++ b/plugins/LinuxVST/src/SoftGate/SoftGate.cpp
@@ -0,0 +1,139 @@
+/* ========================================
+ *  SoftGate - SoftGate.h
+ *  Copyright (c) 2016 airwindows, All rights reserved
+ * ======================================== */
+
+#ifndef __SoftGate_H
+#include "SoftGate.h"
+#endif
+
+AudioEffect* createEffectInstance(audioMasterCallback audioMaster) {return new SoftGate(audioMaster);}
+
+SoftGate::SoftGate(audioMasterCallback audioMaster) :
+    AudioEffectX(audioMaster, kNumPrograms, kNumParameters)
+{
+	A = 0.5;
+	B = 0.5;
+	C = 0.0;
+	storedL[0] = storedL[1] = 0.0;
+	diffL = 0.0;
+	storedR[0] = storedR[1] = 0.0;
+	diffR = 0.0;
+	gate = 1.1;
+	fpd = 17;
+	//this is reset: values being initialized only once. Startup values, whatever they are.
+	
+    _canDo.insert("plugAsChannelInsert"); // plug-in can be used as a channel insert effect.
+    _canDo.insert("plugAsSend"); // plug-in can be used as a send effect.
+    _canDo.insert("x2in2out"); 
+    setNumInputs(kNumInputs);
+    setNumOutputs(kNumOutputs);
+    setUniqueID(kUniqueId);
+    canProcessReplacing();     // supports output replacing
+    canDoubleReplacing();      // supports double precision processing
+	programsAreChunks(true);
+    vst_strncpy (_programName, "Default", kVstMaxProgNameLen); // default program name
+}
+
+SoftGate::~SoftGate() {}
+VstInt32 SoftGate::getVendorVersion () {return 1000;}
+void SoftGate::setProgramName(char *name) {vst_strncpy (_programName, name, kVstMaxProgNameLen);}
+void SoftGate::getProgramName(char *name) {vst_strncpy (name, _programName, kVstMaxProgNameLen);}
+//airwindows likes to ignore this stuff. Make your own programs, and make a different plugin rather than
+//trying to do versioning and preventing people from using older versions. Maybe they like the old one!
+
+static float pinParameter(float data)
+{
+	if (data < 0.0f) return 0.0f;
+	if (data > 1.0f) return 1.0f;
+	return data;
+}
+
+VstInt32 SoftGate::getChunk (void** data, bool isPreset)
+{
+	float *chunkData = (float *)calloc(kNumParameters, sizeof(float));
+	chunkData[0] = A;
+	chunkData[1] = B;
+	chunkData[2] = C;
+	/* Note: The way this is set up, it will break if you manage to save settings on an Intel
+	 machine and load them on a PPC Mac. However, it's fine if you stick to the machine you 
+	 started with. */
+	
+	*data = chunkData;
+	return kNumParameters * sizeof(float);
+}
+
+VstInt32 SoftGate::setChunk (void* data, VstInt32 byteSize, bool isPreset)
+{	
+	float *chunkData = (float *)data;
+	A = pinParameter(chunkData[0]);
+	B = pinParameter(chunkData[1]);
+	C = pinParameter(chunkData[2]);
+	/* We're ignoring byteSize as we found it to be a filthy liar */
+	
+	/* calculate any other fields you need here - you could copy in 
+	 code from setParameter() here. */
+	return 0;
+}
+
+void SoftGate::setParameter(VstInt32 index, float value) {
+    switch (index) {
+        case kParamA: A = value; break;
+        case kParamB: B = value; break;
+        case kParamC: C = value; break;
+        default: throw; // unknown parameter, shouldn't happen!
+    }
+}
+
+float SoftGate::getParameter(VstInt32 index) {
+    switch (index) {
+        case kParamA: return A; break;
+        case kParamB: return B; break;
+        case kParamC: return C; break;
+        default: break; // unknown parameter, shouldn't happen!
+    } return 0.0; //we only need to update the relevant name, this is simple to manage
+}
+
+void SoftGate::getParameterName(VstInt32 index, char *text) {
+    switch (index) {
+        case kParamA: vst_strncpy (text, "Thresh", kVstMaxParamStrLen); break;
+		case kParamB: vst_strncpy (text, "Darken", kVstMaxParamStrLen); break;
+		case kParamC: vst_strncpy (text, "Silence", kVstMaxParamStrLen); break;
+        default: break; // unknown parameter, shouldn't happen!
+    } //this is our labels for displaying in the VST host
+}
+
+void SoftGate::getParameterDisplay(VstInt32 index, char *text) {
+    switch (index) {
+        case kParamA: float2string (A, text, kVstMaxParamStrLen); break;
+        case kParamB: float2string (B, text, kVstMaxParamStrLen); break;
+        case kParamC: float2string (C, text, kVstMaxParamStrLen); break;
+        default: break; // unknown parameter, shouldn't happen!
+	} //this displays the values and handles 'popups' where it's discrete choices
+}
+
+void SoftGate::getParameterLabel(VstInt32 index, char *text) {
+    switch (index) {
+        case kParamA: vst_strncpy (text, "", kVstMaxParamStrLen); break;
+        case kParamB: vst_strncpy (text, "", kVstMaxParamStrLen); break;
+        case kParamC: vst_strncpy (text, "", kVstMaxParamStrLen); break;
+		default: break; // unknown parameter, shouldn't happen!
+    }
+}
+
+VstInt32 SoftGate::canDo(char *text) 
+{ return (_canDo.find(text) == _canDo.end()) ? -1: 1; } // 1 = yes, -1 = no, 0 = don't know
+
+bool SoftGate::getEffectName(char* name) {
+    vst_strncpy(name, "SoftGate", kVstMaxProductStrLen); return true;
+}
+
+VstPlugCategory SoftGate::getPlugCategory() {return kPlugCategEffect;}
+
+bool SoftGate::getProductString(char* text) {
+  	vst_strncpy (text, "airwindows SoftGate", kVstMaxProductStrLen); return true;
+}
+
+bool SoftGate::getVendorString(char* text) {
+  	vst_strncpy (text, "airwindows", kVstMaxVendorStrLen); return true;
+}
diff --git a/plugins/LinuxVST/src/SoftGate/SoftGate.h b/plugins/LinuxVST/src/SoftGate/SoftGate.h
new file mode 100755
index 0000000..51daf48
--- /dev/null
+++ b/plugins/LinuxVST/src/SoftGate/SoftGate.h
@@ -0,0 +1,71 @@
+/* ========================================
+ *  SoftGate - SoftGate.h
+ *  Created 8/12/11 by SPIAdmin 
+ *  Copyright (c) 2011 __MyCompanyName__, All rights reserved
+ * ======================================== */
+
+#ifndef __SoftGate_H
+#define __SoftGate_H
+
+#ifndef __audioeffect__
+#include "audioeffectx.h"
+#endif
+
+#include <set>
+#include <string>
+#include <math.h>
+
+enum {
+	kParamA = 0,
+	kParamB = 1,
+	kParamC = 2,
+  kNumParameters = 3
+}; //
+
+const int kNumPrograms = 0;
+const int kNumInputs = 2;
+const int kNumOutputs = 2;
+const unsigned long kUniqueId = 'lisg';    //Change this to what the AU identity is!
+
+class SoftGate : 
+    public AudioEffectX 
+{
+public:
+    SoftGate(audioMasterCallback audioMaster);
+    ~SoftGate();
+    virtual bool getEffectName(char* name);                       // The plug-in name
+    virtual VstPlugCategory getPlugCategory();                    // The general category for the plug-in
+    virtual bool getProductString(char* text);                    // This is a unique plug-in string provided by Steinberg
+    virtual bool getVendorString(char* text);                     // Vendor info
+    virtual VstInt32 getVendorVersion();                          // Version number
+    virtual void processReplacing (float** inputs, float** outputs, VstInt32 sampleFrames);
+    virtual void processDoubleReplacing (double** inputs, double** outputs, VstInt32 sampleFrames);
+    virtual void getProgramName(char *name);                      // read the name from the host
+    virtual void setProgramName(char *name);                      // changes the name of the preset displayed in the host
+	virtual VstInt32 getChunk (void** data, bool isPreset);
+	virtual VstInt32 setChunk (void* data, VstInt32 byteSize, bool isPreset);
+    virtual float getParameter(VstInt32 index);                   // get the parameter value at the specified index
+    virtual void setParameter(VstInt32 index, float value);       // set the parameter at index to value
+    virtual void getParameterLabel(VstInt32 index, char *text);  // label for the parameter (eg dB)
+    virtual void getParameterName(VstInt32 index, char *text);    // name of the parameter
+    virtual void getParameterDisplay(VstInt32 index, char *text); // text description of the current value    
+    virtual VstInt32 canDo(char *text);
+private:
+    char _programName[kVstMaxProgNameLen + 1];
+    std::set< std::string > _canDo;
+    
+	uint32_t fpd;
+	//default stuff
+	double storedL[2];
+	double diffL;
+	double storedR[2];
+	double diffR;
+	double gate;
+
+    float A;
+    float B;
+    float C;
+
+};
+
+#endif
diff --git a/plugins/LinuxVST/src/SoftGate/SoftGateProc.cpp b/plugins/LinuxVST/src/SoftGate/SoftGateProc.cpp
new file mode 100755
index 0000000..a09429b
--- /dev/null
+++ b/plugins/LinuxVST/src/SoftGate/SoftGateProc.cpp
@@ -0,0 +1,146 @@
+/* ========================================
+ *  SoftGate - SoftGate.h
+ *  Copyright (c) 2016 airwindows, All rights reserved
+ * ======================================== */
+
+#ifndef __SoftGate_H
+#include "SoftGate.h"
+#endif
+
+void SoftGate::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) 
+{
+    float* in1  =  inputs[0];
+    float* in2  =  inputs[1];
+    float* out1 = outputs[0];
+    float* out2 = outputs[1];
+
+	double overallscale = 1.0;
+	overallscale /= 44100.0;
+	overallscale *= getSampleRate();
+	
+	double threshold = pow(A,6);
+	double recovery = pow((B*0.5),6);
+	recovery /= overallscale;
+	double baseline = pow(C,6);
+	double invrec = 1.0 - recovery;
+    
+    while (--sampleFrames >= 0)
+    {
+		long double inputSampleL = *in1;
+		long double inputSampleR = *in2;
+		if (fabs(inputSampleL)<1.18e-37) inputSampleL = fpd * 1.18e-37;
+		if (fabs(inputSampleR)<1.18e-37) inputSampleR = fpd * 1.18e-37;
+
+		storedL[1] = storedL[0];
+		storedL[0] = inputSampleL;
+		diffL = storedL[0] - storedL[1];
+		
+		storedR[1] = storedR[0];
+		storedR[0] = inputSampleR;
+		diffR = storedR[0] - storedR[1];
+		
+		if (gate > 0) {gate = ((gate-baseline) * invrec) + baseline;}
+		
+		if ((fabs(diffR) > threshold) || (fabs(diffL) > threshold)) {gate = 1.1;}
+		else {gate = (gate * invrec); if (threshold > 0) {gate += ((fabs(inputSampleL)/threshold) * recovery);gate += ((fabs(inputSampleR)/threshold) * recovery);}}
+		
+		if (gate < 0) gate = 0;
+		
+		if (gate < 1.0)
+		{
+			storedL[0] = storedL[1] + (diffL * gate);		
+			storedR[0] = storedR[1] + (diffR * gate);
+		}
+		
+		if (gate < 1) {
+			inputSampleL = (inputSampleL * gate) + (storedL[0] * (1.0-gate));
+			inputSampleR = (inputSampleR * gate) + (storedR[0] * (1.0-gate));
+		}
+				
+		//begin 32 bit stereo floating point dither
+		int expon; frexpf((float)inputSampleL, &expon);
+		fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
+		inputSampleL += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
+		frexpf((float)inputSampleR, &expon);
+		fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
+		inputSampleR += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
+		//end 32 bit stereo floating point dither
+		
+		*out1 = inputSampleL;
+		*out2 = inputSampleR;
+
+		*in1++;
+		*in2++;
+		*out1++;
+		*out2++;
+    }
+}
+
+void SoftGate::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) 
+{
+    double* in1  =  inputs[0];
+    double* in2  =  inputs[1];
+    double* out1 = outputs[0];
+    double* out2 = outputs[1];
+
+	double overallscale = 1.0;
+	overallscale /= 44100.0;
+	overallscale *= getSampleRate();
+	
+	double threshold = pow(A,6);
+	double recovery = pow((B*0.5),6);
+	recovery /= overallscale;
+	double baseline = pow(C,6);
+	double invrec = 1.0 - recovery;
+	
+    while (--sampleFrames >= 0)
+    {
+		long double inputSampleL = *in1;
+		long double inputSampleR = *in2;
+		if (fabs(inputSampleL)<1.18e-43) inputSampleL = fpd * 1.18e-43;
+		if (fabs(inputSampleR)<1.18e-43) inputSampleR = fpd * 1.18e-43;
+
+		storedL[1] = storedL[0];
+		storedL[0] = inputSampleL;
+		diffL = storedL[0] - storedL[1];
+		
+		storedR[1] = storedR[0];
+		storedR[0] = inputSampleR;
+		diffR = storedR[0] - storedR[1];
+		
+		if (gate > 0) {gate = ((gate-baseline) * invrec) + baseline;}
+		
+		if ((fabs(diffR) > threshold) || (fabs(diffL) > threshold)) {gate = 1.1;}
+		else {gate = (gate * invrec); if (threshold > 0) {gate += ((fabs(inputSampleL)/threshold) * recovery);gate += ((fabs(inputSampleR)/threshold) * recovery);}}
+		
+		if (gate < 0) gate = 0;
+		
+		if (gate < 1.0)
+		{
+			storedL[0] = storedL[1] + (diffL * gate);		
+			storedR[0] = storedR[1] + (diffR * gate);
+		}
+		
+		if (gate < 1) {
+			inputSampleL = (inputSampleL * gate) + (storedL[0] * (1.0-gate));
+			inputSampleR = (inputSampleR * gate) + (storedR[0] * (1.0-gate));
+		}
+				
+		//begin 64 bit stereo floating point dither
+		int expon; frexp((double)inputSampleL, &expon);
+		fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
+		inputSampleL += ((double(fpd)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
+		frexp((double)inputSampleR, &expon);
+		fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
+		inputSampleR += ((double(fpd)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
+		//end 64 bit stereo floating point dither
+		
+		*out1 = inputSampleL;
+		*out2 = inputSampleR;
+
+		*in1++;
+		*in2++;
+		*out1++;
+		*out2++;
+    }
+}