Interstage

4 files changed, 362 insertions, 0 deletions

diff --git a/plugins/LinuxVST/CMakeLists.txt b/plugins/LinuxVST/CMakeLists.txt
index 476a386..9ca381a 100755
--- a/plugins/LinuxVST/CMakeLists.txt
+++ b/plugins/LinuxVST/CMakeLists.txt
@@ -95,6 +95,7 @@ add_airwindows_plugin(Highpass)
 add_airwindows_plugin(Highpass2)
 add_airwindows_plugin(Holt)
 add_airwindows_plugin(Hombre)
+add_airwindows_plugin(Interstage)
 add_airwindows_plugin(IronOxide5)
 add_airwindows_plugin(IronOxideClassic)
 add_airwindows_plugin(Logical4)
diff --git a/plugins/LinuxVST/src/Interstage/Interstage.cpp b/plugins/LinuxVST/src/Interstage/Interstage.cpp
new file mode 100755
index 0000000..9c8acdd
--- /dev/null
+++ b/plugins/LinuxVST/src/Interstage/Interstage.cpp
@@ -0,0 +1,107 @@
+/* ========================================
+ *  Interstage - Interstage.h
+ *  Copyright (c) 2016 airwindows, All rights reserved
+ * ======================================== */
+
+#ifndef __Interstage_H
+#include "Interstage.h"
+#endif
+
+AudioEffect* createEffectInstance(audioMasterCallback audioMaster) {return new Interstage(audioMaster);}
+
+Interstage::Interstage(audioMasterCallback audioMaster) :
+    AudioEffectX(audioMaster, kNumPrograms, kNumParameters)
+{
+	iirSampleAL = 0.0;
+	iirSampleBL = 0.0;
+	iirSampleCL = 0.0;
+	iirSampleDL = 0.0;
+	iirSampleEL = 0.0;
+	iirSampleFL = 0.0;
+	lastSampleL = 0.0;
+	iirSampleAR = 0.0;
+	iirSampleBR = 0.0;
+	iirSampleCR = 0.0;
+	iirSampleDR = 0.0;
+	iirSampleER = 0.0;
+	iirSampleFR = 0.0;
+	lastSampleR = 0.0;
+	fpd = 17;
+	flip = true;
+	//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
+}
+
+Interstage::~Interstage() {}
+VstInt32 Interstage::getVendorVersion () {return 1000;}
+void Interstage::setProgramName(char *name) {vst_strncpy (_programName, name, kVstMaxProgNameLen);}
+void Interstage::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!
+
+VstInt32 Interstage::getChunk (void** data, bool isPreset)
+{
+	return 0;
+}
+
+VstInt32 Interstage::setChunk (void* data, VstInt32 byteSize, bool isPreset)
+{	
+	return 0;
+}
+
+void Interstage::setParameter(VstInt32 index, float value) {
+    switch (index) {
+        default: throw; // unknown parameter, shouldn't happen!
+    }
+}
+
+float Interstage::getParameter(VstInt32 index) {
+    switch (index) {
+        default: break; // unknown parameter, shouldn't happen!
+    } return 0.0; //we only need to update the relevant name, this is simple to manage
+}
+
+void Interstage::getParameterName(VstInt32 index, char *text) {
+    switch (index) {
+        default: break; // unknown parameter, shouldn't happen!
+    } //this is our labels for displaying in the VST host
+}
+
+void Interstage::getParameterDisplay(VstInt32 index, char *text) {
+    switch (index) {
+        default: break; // unknown parameter, shouldn't happen!
+	} //this displays the values and handles 'popups' where it's discrete choices
+}
+
+void Interstage::getParameterLabel(VstInt32 index, char *text) {
+    switch (index) {
+		default: break; // unknown parameter, shouldn't happen!
+    }
+}
+
+VstInt32 Interstage::canDo(char *text) 
+{ return (_canDo.find(text) == _canDo.end()) ? -1: 1; } // 1 = yes, -1 = no, 0 = don't know
+
+bool Interstage::getEffectName(char* name) {
+    vst_strncpy(name, "Interstage", kVstMaxProductStrLen); return true;
+}
+
+VstPlugCategory Interstage::getPlugCategory() {return kPlugCategEffect;}
+
+bool Interstage::getProductString(char* text) {
+  	vst_strncpy (text, "airwindows Interstage", kVstMaxProductStrLen); return true;
+}
+
+bool Interstage::getVendorString(char* text) {
+  	vst_strncpy (text, "airwindows", kVstMaxVendorStrLen); return true;
+}
diff --git a/plugins/LinuxVST/src/Interstage/Interstage.h b/plugins/LinuxVST/src/Interstage/Interstage.h
new file mode 100755
index 0000000..146b84c
--- /dev/null
+++ b/plugins/LinuxVST/src/Interstage/Interstage.h
@@ -0,0 +1,72 @@
+/* ========================================
+ *  Interstage - Interstage.h
+ *  Created 8/12/11 by SPIAdmin 
+ *  Copyright (c) 2011 __MyCompanyName__, All rights reserved
+ * ======================================== */
+
+#ifndef __Interstage_H
+#define __Interstage_H
+
+#ifndef __audioeffect__
+#include "audioeffectx.h"
+#endif
+
+#include <set>
+#include <string>
+#include <math.h>
+
+enum {
+  kNumParameters = 0
+}; //
+
+const int kNumPrograms = 0;
+const int kNumInputs = 2;
+const int kNumOutputs = 2;
+const unsigned long kUniqueId = 'inte';    //Change this to what the AU identity is!
+
+class Interstage : 
+    public AudioEffectX 
+{
+public:
+    Interstage(audioMasterCallback audioMaster);
+    ~Interstage();
+    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;
+    
+	double iirSampleAL;
+	double iirSampleBL;
+	double iirSampleCL;
+	double iirSampleDL;
+	double iirSampleEL;
+	double iirSampleFL;
+	long double lastSampleL;
+	double iirSampleAR;
+	double iirSampleBR;
+	double iirSampleCR;
+	double iirSampleDR;
+	double iirSampleER;
+	double iirSampleFR;
+	long double lastSampleR;
+	uint32_t fpd;
+	bool flip;
+};
+
+#endif
diff --git a/plugins/LinuxVST/src/Interstage/InterstageProc.cpp b/plugins/LinuxVST/src/Interstage/InterstageProc.cpp
new file mode 100755
index 0000000..16f3ba1
--- /dev/null
+++ b/plugins/LinuxVST/src/Interstage/InterstageProc.cpp
@@ -0,0 +1,182 @@
+/* ========================================
+ *  Interstage - Interstage.h
+ *  Copyright (c) 2016 airwindows, All rights reserved
+ * ======================================== */
+
+#ifndef __Interstage_H
+#include "Interstage.h"
+#endif
+
+void Interstage::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 firstStage = 0.381966011250105 / overallscale;
+	double iirAmount = 0.00295 / overallscale;
+	double threshold = 0.381966011250105 / overallscale;
+    
+    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;
+		long double drySampleL = inputSampleL;
+		long double drySampleR = inputSampleR;
+		
+		inputSampleL = (inputSampleL+lastSampleL)*0.5;
+		inputSampleR = (inputSampleR+lastSampleR)*0.5; //start the lowpassing with an average
+		
+		if (flip) {
+			iirSampleAL = (iirSampleAL * (1 - firstStage)) + (inputSampleL * firstStage); inputSampleL = iirSampleAL;
+			iirSampleCL = (iirSampleCL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleCL;
+			iirSampleEL = (iirSampleEL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleEL;
+			inputSampleL = drySampleL - inputSampleL;
+			//make highpass
+			if (inputSampleL - iirSampleAL > threshold) inputSampleL = iirSampleAL + threshold;
+			if (inputSampleL - iirSampleAL < -threshold) inputSampleL = iirSampleAL - threshold;
+			//slew limit against lowpassed reference point
+			
+			iirSampleAR = (iirSampleAR * (1 - firstStage)) + (inputSampleR * firstStage); inputSampleR = iirSampleAR;
+			iirSampleCR = (iirSampleCR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleCR;
+			iirSampleER = (iirSampleER * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleER;
+			inputSampleR = drySampleR - inputSampleR;
+			//make highpass
+			if (inputSampleR - iirSampleAR > threshold) inputSampleR = iirSampleAR + threshold;
+			if (inputSampleR - iirSampleAR < -threshold) inputSampleR = iirSampleAR - threshold;
+			//slew limit against lowpassed reference point
+		} else {
+			iirSampleBL = (iirSampleBL * (1 - firstStage)) + (inputSampleL * firstStage); inputSampleL = iirSampleBL;
+			iirSampleDL = (iirSampleDL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleDL;
+			iirSampleFL = (iirSampleFL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleFL;
+			inputSampleL = drySampleL - inputSampleL;
+			//make highpass
+			if (inputSampleL - iirSampleBL > threshold) inputSampleL = iirSampleBL + threshold;
+			if (inputSampleL - iirSampleBL < -threshold) inputSampleL = iirSampleBL - threshold;
+			//slew limit against lowpassed reference point
+			
+			iirSampleBR = (iirSampleBR * (1 - firstStage)) + (inputSampleR * firstStage); inputSampleR = iirSampleBR;
+			iirSampleDR = (iirSampleDR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleDR;
+			iirSampleFR = (iirSampleFR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleFR;
+			inputSampleR = drySampleR - inputSampleR;
+			//make highpass
+			if (inputSampleR - iirSampleBR > threshold) inputSampleR = iirSampleBR + threshold;
+			if (inputSampleR - iirSampleBR < -threshold) inputSampleR = iirSampleBR - threshold;
+			//slew limit against lowpassed reference point
+		}
+		flip = !flip;
+		lastSampleL = inputSampleL;
+		lastSampleR = inputSampleR;
+		
+		//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 Interstage::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 firstStage = 0.381966011250105 / overallscale;
+	double iirAmount = 0.00295 / overallscale;
+	double threshold = 0.381966011250105 / overallscale;
+	
+    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;
+		long double drySampleL = inputSampleL;
+		long double drySampleR = inputSampleR;
+
+		inputSampleL = (inputSampleL+lastSampleL)*0.5;
+		inputSampleR = (inputSampleR+lastSampleR)*0.5; //start the lowpassing with an average
+		
+		if (flip) {
+			iirSampleAL = (iirSampleAL * (1 - firstStage)) + (inputSampleL * firstStage); inputSampleL = iirSampleAL;
+			iirSampleCL = (iirSampleCL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleCL;
+			iirSampleEL = (iirSampleEL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleEL;
+			inputSampleL = drySampleL - inputSampleL;
+			//make highpass
+			if (inputSampleL - iirSampleAL > threshold) inputSampleL = iirSampleAL + threshold;
+			if (inputSampleL - iirSampleAL < -threshold) inputSampleL = iirSampleAL - threshold;
+			//slew limit against lowpassed reference point
+			
+			iirSampleAR = (iirSampleAR * (1 - firstStage)) + (inputSampleR * firstStage); inputSampleR = iirSampleAR;
+			iirSampleCR = (iirSampleCR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleCR;
+			iirSampleER = (iirSampleER * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleER;
+			inputSampleR = drySampleR - inputSampleR;
+			//make highpass
+			if (inputSampleR - iirSampleAR > threshold) inputSampleR = iirSampleAR + threshold;
+			if (inputSampleR - iirSampleAR < -threshold) inputSampleR = iirSampleAR - threshold;
+			//slew limit against lowpassed reference point
+		} else {
+			iirSampleBL = (iirSampleBL * (1 - firstStage)) + (inputSampleL * firstStage); inputSampleL = iirSampleBL;
+			iirSampleDL = (iirSampleDL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleDL;
+			iirSampleFL = (iirSampleFL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleFL;
+			inputSampleL = drySampleL - inputSampleL;
+			//make highpass
+			if (inputSampleL - iirSampleBL > threshold) inputSampleL = iirSampleBL + threshold;
+			if (inputSampleL - iirSampleBL < -threshold) inputSampleL = iirSampleBL - threshold;
+			//slew limit against lowpassed reference point
+			
+			iirSampleBR = (iirSampleBR * (1 - firstStage)) + (inputSampleR * firstStage); inputSampleR = iirSampleBR;
+			iirSampleDR = (iirSampleDR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleDR;
+			iirSampleFR = (iirSampleFR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleFR;
+			inputSampleR = drySampleR - inputSampleR;
+			//make highpass
+			if (inputSampleR - iirSampleBR > threshold) inputSampleR = iirSampleBR + threshold;
+			if (inputSampleR - iirSampleBR < -threshold) inputSampleR = iirSampleBR - threshold;
+			//slew limit against lowpassed reference point
+		}
+		flip = !flip;
+		lastSampleL = inputSampleL;
+		lastSampleR = inputSampleR;
+		
+		//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++;
+    }
+}