PurestAir

3 files changed, 448 insertions, 0 deletions

diff --git a/plugins/LinuxVST/src/PurestAir/PurestAir.cpp b/plugins/LinuxVST/src/PurestAir/PurestAir.cpp
new file mode 100755
index 0000000..3314d21
--- /dev/null
+++ b/plugins/LinuxVST/src/PurestAir/PurestAir.cpp
@@ -0,0 +1,144 @@
+/* ========================================
+ *  PurestAir - PurestAir.h
+ *  Copyright (c) 2016 airwindows, All rights reserved
+ * ======================================== */
+
+#ifndef __PurestAir_H
+#include "PurestAir.h"
+#endif
+
+AudioEffect* createEffectInstance(audioMasterCallback audioMaster) {return new PurestAir(audioMaster);}
+
+PurestAir::PurestAir(audioMasterCallback audioMaster) :
+    AudioEffectX(audioMaster, kNumPrograms, kNumParameters)
+{
+	A = 0.5;
+	B = 0.0;
+	C = 1.0;
+	last1SampleL = 0.0;
+	halfwaySampleL = halfDrySampleL = halfDiffSampleL = diffSampleL = 0.0;
+	lastSampleL = 0.0;
+	s1L = s2L = s3L = 0.0;
+	applyL = 0.0;
+	last1SampleR = 0.0;
+	halfwaySampleR = halfDrySampleR = halfDiffSampleR = diffSampleR = 0.0;
+	lastSampleR = 0.0;
+	s1R = s2R = s3R = 0.0;
+	applyR = 0.0;
+	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
+}
+
+PurestAir::~PurestAir() {}
+VstInt32 PurestAir::getVendorVersion () {return 1000;}
+void PurestAir::setProgramName(char *name) {vst_strncpy (_programName, name, kVstMaxProgNameLen);}
+void PurestAir::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 PurestAir::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 PurestAir::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 PurestAir::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 PurestAir::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 PurestAir::getParameterName(VstInt32 index, char *text) {
+    switch (index) {
+        case kParamA: vst_strncpy (text, "Boost", kVstMaxParamStrLen); break;
+		case kParamB: vst_strncpy (text, "Limit", kVstMaxParamStrLen); break;
+		case kParamC: vst_strncpy (text, "Dry/Wet", kVstMaxParamStrLen); break;
+        default: break; // unknown parameter, shouldn't happen!
+    } //this is our labels for displaying in the VST host
+}
+
+void PurestAir::getParameterDisplay(VstInt32 index, char *text) {
+    switch (index) {
+        case kParamA: float2string ((A*2.0)-1.0, 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 PurestAir::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 PurestAir::canDo(char *text) 
+{ return (_canDo.find(text) == _canDo.end()) ? -1: 1; } // 1 = yes, -1 = no, 0 = don't know
+
+bool PurestAir::getEffectName(char* name) {
+    vst_strncpy(name, "PurestAir", kVstMaxProductStrLen); return true;
+}
+
+VstPlugCategory PurestAir::getPlugCategory() {return kPlugCategEffect;}
+
+bool PurestAir::getProductString(char* text) {
+  	vst_strncpy (text, "airwindows PurestAir", kVstMaxProductStrLen); return true;
+}
+
+bool PurestAir::getVendorString(char* text) {
+  	vst_strncpy (text, "airwindows", kVstMaxVendorStrLen); return true;
+}
diff --git a/plugins/LinuxVST/src/PurestAir/PurestAir.h b/plugins/LinuxVST/src/PurestAir/PurestAir.h
new file mode 100755
index 0000000..5b592c3
--- /dev/null
+++ b/plugins/LinuxVST/src/PurestAir/PurestAir.h
@@ -0,0 +1,86 @@
+/* ========================================
+ *  PurestAir - PurestAir.h
+ *  Created 8/12/11 by SPIAdmin 
+ *  Copyright (c) 2011 __MyCompanyName__, All rights reserved
+ * ======================================== */
+
+#ifndef __PurestAir_H
+#define __PurestAir_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 = 'pair';    //Change this to what the AU identity is!
+
+class PurestAir : 
+    public AudioEffectX 
+{
+public:
+    PurestAir(audioMasterCallback audioMaster);
+    ~PurestAir();
+    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
+	long double last1SampleL;
+	long double halfwaySampleL;
+	long double halfDrySampleL;
+	long double halfDiffSampleL;
+	long double diffSampleL;
+	long double lastSampleL;
+	double s1L;
+	double s2L;
+	double s3L;
+	double applyL;
+
+	long double last1SampleR;
+	long double halfwaySampleR;
+	long double halfDrySampleR;
+	long double halfDiffSampleR;
+	long double diffSampleR;
+	long double lastSampleR;
+	double s1R;
+	double s2R;
+	double s3R;
+	double applyR;
+	
+    float A;
+    float B;
+    float C;
+};
+
+#endif
diff --git a/plugins/LinuxVST/src/PurestAir/PurestAirProc.cpp b/plugins/LinuxVST/src/PurestAir/PurestAirProc.cpp
new file mode 100755
index 0000000..73939a7
--- /dev/null
+++ b/plugins/LinuxVST/src/PurestAir/PurestAirProc.cpp
@@ -0,0 +1,218 @@
+/* ========================================
+ *  PurestAir - PurestAir.h
+ *  Copyright (c) 2016 airwindows, All rights reserved
+ * ======================================== */
+
+#ifndef __PurestAir_H
+#include "PurestAir.h"
+#endif
+
+void PurestAir::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) 
+{
+    float* in1  =  inputs[0];
+    float* in2  =  inputs[1];
+    float* out1 = outputs[0];
+    float* out2 = outputs[1];
+
+	double applyTarget = (A*2.0)-1.0;
+	double threshold = pow((1-fabs(applyTarget)),3);
+	if (applyTarget > 0) applyTarget *= 3;
+	
+	double intensity = pow(B,2)*5.0;
+	double wet = C;
+    
+    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;
+
+		halfDrySampleL = halfwaySampleL = (inputSampleL + last1SampleL) / 2.0;
+		last1SampleL = inputSampleL;
+		s3L = s2L;
+		s2L = s1L;
+		s1L = inputSampleL;
+		double m1 = (s1L-s2L)*((s1L-s2L)/1.3);
+		double m2 = (s2L-s3L)*((s1L-s2L)/1.3);
+		double sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
+		//this will be 0 for smooth, high for SSS
+		applyL += applyTarget - sense;
+		applyL *= 0.5;
+		if (applyL < -1.0) applyL = -1.0;
+		
+		double clamp = halfwaySampleL - halfDrySampleL;
+		if (clamp > threshold) halfwaySampleL = lastSampleL + threshold;
+		if (-clamp > threshold) halfwaySampleL = lastSampleL - threshold;
+		lastSampleL = halfwaySampleL;
+		
+		clamp = inputSampleL - lastSampleL;
+		if (clamp > threshold) inputSampleL = lastSampleL + threshold;
+		if (-clamp > threshold) inputSampleL = lastSampleL - threshold;
+		lastSampleL = inputSampleL;
+		
+		diffSampleL = *in1 - inputSampleL;
+		halfDiffSampleL = halfDrySampleL - halfwaySampleL;
+		
+		inputSampleL = *in1 + ((diffSampleL + halfDiffSampleL)*applyL);
+		//done with left channel
+		
+		halfDrySampleR = halfwaySampleR = (inputSampleR + last1SampleR) / 2.0;
+		last1SampleR = inputSampleR;
+		s3R = s2R;
+		s2R = s1R;
+		s1R = inputSampleR;
+		m1 = (s1R-s2R)*((s1R-s2R)/1.3);
+		m2 = (s2R-s3R)*((s1R-s2R)/1.3);
+		sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
+		//this will be 0 for smooth, high for SSS
+		applyR += applyTarget - sense;
+		applyR *= 0.5;
+		if (applyR < -1.0) applyR = -1.0;
+		
+		clamp = halfwaySampleR - halfDrySampleR;
+		if (clamp > threshold) halfwaySampleR = lastSampleR + threshold;
+		if (-clamp > threshold) halfwaySampleR = lastSampleR - threshold;
+		lastSampleR = halfwaySampleR;
+		
+		clamp = inputSampleR - lastSampleR;
+		if (clamp > threshold) inputSampleR = lastSampleR + threshold;
+		if (-clamp > threshold) inputSampleR = lastSampleR - threshold;
+		lastSampleR = inputSampleR;
+		
+		diffSampleR = *in2 - inputSampleR;
+		halfDiffSampleR = halfDrySampleR - halfwaySampleR;
+		
+		inputSampleR = *in2 + ((diffSampleR + halfDiffSampleR)*applyR);
+		//done with right channel
+		
+		if (wet !=1.0) {
+			inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
+			inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
+		}
+		
+		//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 PurestAir::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) 
+{
+    double* in1  =  inputs[0];
+    double* in2  =  inputs[1];
+    double* out1 = outputs[0];
+    double* out2 = outputs[1];
+	
+	double applyTarget = (A*2.0)-1.0;
+	double threshold = pow((1-fabs(applyTarget)),3);
+	if (applyTarget > 0) applyTarget *= 3;
+	
+	double intensity = pow(B,2)*5.0;
+	double wet = C;
+    
+    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;
+		
+		halfDrySampleL = halfwaySampleL = (inputSampleL + last1SampleL) / 2.0;
+		last1SampleL = inputSampleL;
+		s3L = s2L;
+		s2L = s1L;
+		s1L = inputSampleL;
+		double m1 = (s1L-s2L)*((s1L-s2L)/1.3);
+		double m2 = (s2L-s3L)*((s1L-s2L)/1.3);
+		double sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
+		//this will be 0 for smooth, high for SSS
+		applyL += applyTarget - sense;
+		applyL *= 0.5;
+		if (applyL < -1.0) applyL = -1.0;
+		
+		double clamp = halfwaySampleL - halfDrySampleL;
+		if (clamp > threshold) halfwaySampleL = lastSampleL + threshold;
+		if (-clamp > threshold) halfwaySampleL = lastSampleL - threshold;
+		lastSampleL = halfwaySampleL;
+		
+		clamp = inputSampleL - lastSampleL;
+		if (clamp > threshold) inputSampleL = lastSampleL + threshold;
+		if (-clamp > threshold) inputSampleL = lastSampleL - threshold;
+		lastSampleL = inputSampleL;
+		
+		diffSampleL = *in1 - inputSampleL;
+		halfDiffSampleL = halfDrySampleL - halfwaySampleL;
+		
+		inputSampleL = *in1 + ((diffSampleL + halfDiffSampleL)*applyL);
+		//done with left channel
+		
+		halfDrySampleR = halfwaySampleR = (inputSampleR + last1SampleR) / 2.0;
+		last1SampleR = inputSampleR;
+		s3R = s2R;
+		s2R = s1R;
+		s1R = inputSampleR;
+		m1 = (s1R-s2R)*((s1R-s2R)/1.3);
+		m2 = (s2R-s3R)*((s1R-s2R)/1.3);
+		sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
+		//this will be 0 for smooth, high for SSS
+		applyR += applyTarget - sense;
+		applyR *= 0.5;
+		if (applyR < -1.0) applyR = -1.0;
+		
+		clamp = halfwaySampleR - halfDrySampleR;
+		if (clamp > threshold) halfwaySampleR = lastSampleR + threshold;
+		if (-clamp > threshold) halfwaySampleR = lastSampleR - threshold;
+		lastSampleR = halfwaySampleR;
+		
+		clamp = inputSampleR - lastSampleR;
+		if (clamp > threshold) inputSampleR = lastSampleR + threshold;
+		if (-clamp > threshold) inputSampleR = lastSampleR - threshold;
+		lastSampleR = inputSampleR;
+		
+		diffSampleR = *in2 - inputSampleR;
+		halfDiffSampleR = halfDrySampleR - halfwaySampleR;
+		
+		inputSampleR = *in2 + ((diffSampleR + halfDiffSampleR)*applyR);
+		//done with right channel
+		
+		if (wet !=1.0) {
+			inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
+			inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
+		}
+		
+		//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++;
+    }
+}