From e360047054117d63fb579ec9231e9dc77c99f12a Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Fri, 8 Aug 2008 22:45:58 +0000
Subject: Add preliminary (library side only) LV2 port of MDA (open-sourced VST
 plugins).

git-svn-id: http://svn.drobilla.net/lad/mda-lv2@1321 a436a847-0d15-0410-975c-d299462d15a1
---
 src/mdaRoundPan.cpp | 196 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 196 insertions(+)
 create mode 100644 src/mdaRoundPan.cpp

(limited to 'src/mdaRoundPan.cpp')

diff --git a/src/mdaRoundPan.cpp b/src/mdaRoundPan.cpp
new file mode 100644
index 0000000..b99f68c
--- /dev/null
+++ b/src/mdaRoundPan.cpp
@@ -0,0 +1,196 @@
+#include "mdaRoundPan.h"
+
+#include <math.h>
+#include <float.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+  return new mdaRoundPan(audioMaster);
+}
+
+mdaRoundPan::mdaRoundPan(audioMasterCallback audioMaster)	: AudioEffectX(audioMaster, 1, 2)	// programs, parameters
+{
+  //inits here!
+  fParam1 = (float)0.5; //pan
+  fParam2 = (float)0.8; //auto
+  
+  //size = 1500;
+  //bufpos = 0;
+	//buffer = new float[size];
+  //buffer2 = new float[size];
+
+  setNumInputs(2);		  
+	setNumOutputs(2);		  
+	setUniqueID("mdaP");    // identify here
+	DECLARE_LVZ_DEPRECATED(canMono) ();				      
+	canProcessReplacing();	
+	strcpy(programName, "Round Panner");
+	suspend();		// flush buffer
+
+  //calcs here!
+  phi = 0.0;
+  dphi = (float)(5.0 / getSampleRate());
+}
+
+bool  mdaRoundPan::getProductString(char* text) { strcpy(text, "mda RoundPan"); return true; }
+bool  mdaRoundPan::getVendorString(char* text)  { strcpy(text, "mda"); return true; }
+bool  mdaRoundPan::getEffectName(char* name)    { strcpy(name, "RoundPan"); return true; }
+
+void mdaRoundPan::setParameter(LvzInt32 index, float value)
+{
+	switch(index)
+  {
+    case 0: fParam1 = value; phi = (float)(6.2831853 * (fParam1 - 0.5)); break;
+    case 1: fParam2 = value; break;
+  }
+  //calcs here
+  if (fParam2>0.55)
+  {
+    dphi = (float)(20.0 * (fParam2 - 0.55) / getSampleRate());
+  }
+  else
+  {
+    if (fParam2<0.45)
+    {
+      dphi = (float)(-20.0 * (0.45 - fParam2) / getSampleRate());
+    }
+    else
+    {
+      dphi = 0.0;
+    }
+  }
+}
+
+mdaRoundPan::~mdaRoundPan()
+{
+	//if(buffer) delete buffer;
+  //if(buffer2) delete buffer2;
+}
+
+void mdaRoundPan::suspend()
+{
+	//memset(buffer, 0, size * sizeof(float));
+	//memset(buffer2, 0, size * sizeof(float));
+}
+
+void mdaRoundPan::setProgramName(char *name)
+{
+	strcpy(programName, name);
+}
+
+void mdaRoundPan::getProgramName(char *name)
+{
+	strcpy(name, programName);
+}
+
+float mdaRoundPan::getParameter(LvzInt32 index)
+{
+	float v=0;
+
+  switch(index)
+  {
+    case 0: v = fParam1; break;
+    case 1: v = fParam2; break;
+  }
+  return v;
+}
+
+void mdaRoundPan::getParameterName(LvzInt32 index, char *label)
+{
+	switch(index)
+  {
+    case 0: strcpy(label, "Pan"); break;
+    case 1: strcpy(label, "Auto"); break;
+  }
+}
+
+#include <stdio.h>
+void long2string(long value, char *string) { sprintf(string, "%ld", value); }
+
+void mdaRoundPan::getParameterDisplay(LvzInt32 index, char *text)
+{
+	switch(index)
+  {
+    case 0: long2string((long)(360.0 * (fParam1 - 0.5)), text); break;
+    case 1: long2string((long)(57.296 * dphi * getSampleRate()), text); break;
+  }
+}
+
+void mdaRoundPan::getParameterLabel(LvzInt32 index, char *label)
+{
+	switch(index)
+  {
+    case 0: strcpy(label, "deg"); break;
+    case 1: strcpy(label, "deg/sec"); break;
+  }
+}
+
+//--------------------------------------------------------------------------------
+// process
+
+void mdaRoundPan::process(float **inputs, float **outputs, LvzInt32 sampleFrames)
+{
+	float *in1 = inputs[0];
+	float *in2 = inputs[1];
+	float *out1 = outputs[0];
+	float *out2 = outputs[1];
+	float a, c, d, x=0.5, y=(float)0.7854;	
+  float ph, dph, fourpi=(float)12.566371;
+  
+  ph = phi;
+  dph = dphi;
+
+  --in1;	
+	--in2;	
+	--out1;
+	--out2;
+	while(--sampleFrames >= 0)
+	{
+		a = x * (*++in1 + *++in2);
+		
+    c = out1[1];
+		d = out2[1]; //process from here...
+          
+    c += (float)(a * -sin((x * ph) - y)); // output
+		d += (float)(a * sin((x * ph) + y));
+
+    ph = ph + dph;
+
+    *++out1 = c;	
+		*++out2 = d;
+	}
+  if(ph<0.0) ph = ph + fourpi; else if(ph>fourpi) ph = ph - fourpi;
+  phi = ph;
+}
+
+void mdaRoundPan::processReplacing(float **inputs, float **outputs, LvzInt32 sampleFrames)
+{
+	float *in1 = inputs[0];
+	float *in2 = inputs[1];
+	float *out1 = outputs[0];
+	float *out2 = outputs[1];
+	float a, c, d, x=0.5, y=(float)0.7854;	
+  float ph, dph, fourpi=(float)12.566371;
+  
+  ph = phi;
+  dph = dphi;
+  
+	--in1;	
+	--in2;	
+	--out1;
+	--out2;
+	while(--sampleFrames >= 0)
+	{
+		a = x * (*++in1 + *++in2); //process from here...
+		    
+		c = (float)(a * -sin((x * ph) - y)); // output
+		d = (float)(a * sin((x * ph) + y));
+		    
+    ph = ph + dph;
+
+    *++out1 = c;
+		*++out2 = d;
+	}
+  if(ph<0.0) ph = ph + fourpi; else if(ph>fourpi) ph = ph - fourpi;
+  phi = ph;
+}
-- 
cgit v1.2.1