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/mdaBeatBox.cpp | 465 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 465 insertions(+)
 create mode 100644 src/mdaBeatBox.cpp

(limited to 'src/mdaBeatBox.cpp')

diff --git a/src/mdaBeatBox.cpp b/src/mdaBeatBox.cpp
new file mode 100644
index 0000000..7fb9737
--- /dev/null
+++ b/src/mdaBeatBox.cpp
@@ -0,0 +1,465 @@
+#include "mdaBeatBox.h"
+
+#include <math.h>
+#include <stdlib.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+  return new mdaBeatBox(audioMaster);
+}
+
+mdaBeatBox::mdaBeatBox(audioMasterCallback audioMaster)	: AudioEffectX(audioMaster, 1, 12)	// programs, parameters
+{
+  fParam1 = 0.30f; //hat thresh
+  fParam2 = 0.45f; //hat rate
+  fParam3 = 0.50f; //hat mix
+   fParam4 = 0.46f; //kick thresh 	
+   fParam5 = 0.15f; //kick key
+   fParam6 = 0.50f; //kick mix
+  fParam7 = 0.50f; //snare thresh
+  fParam8 = 0.70f; //snare key
+  fParam9 = 0.50f; //snare mix
+   fParam10 = 0.00f; //dynamics
+   fParam11 = 0.00f; //record 
+   fParam12 = 0.00f; //thru mix
+
+  hbuflen = 20000;
+  kbuflen = 20000;
+  sbuflen = 60000;
+  if(getSampleRate()>49000) { hbuflen*=2; kbuflen*=2; sbuflen*=2; }
+
+  hbuf = new float[hbuflen];
+	sbuf = new float[sbuflen]; sbuf2 = new float[sbuflen];
+	kbuf = new float[kbuflen];
+
+  setNumInputs(2);		    // stereo in
+	setNumOutputs(2);		    // stereo out
+	setUniqueID("mdaG");    // identify
+	DECLARE_LVZ_DEPRECATED(canMono) ();				      
+	canProcessReplacing();	// supports both accumulating and replacing output
+	strcpy(programName, "BeatBox - Drum Replacer");	// default program name
+  synth();
+
+  //calcs here
+  hthr = (float)pow(10.f, 2.f * fParam1 - 2.f);
+  hdel = (long)((0.04 + 0.20 * fParam2) * getSampleRate());
+  sthr = (float)(40.0 * pow(10.f, 2.f * fParam7 - 2.f));
+  sdel = (long)(0.12 * getSampleRate());
+  kthr = (float)(220.0 * pow(10.f, 2.f * fParam4 - 2.f));
+  kdel = (long)(0.10 * getSampleRate());
+
+  hlev = (float)(0.0001f + fParam3 * fParam3 * 4.f);
+  klev = (float)(0.0001f + fParam6 * fParam6 * 4.f);
+  slev = (float)(0.0001f + fParam9 * fParam9 * 4.f);
+ 
+  kww = (float)pow(10.0,-3.0 + 2.2 * fParam5);
+  ksf1 = (float)cos(3.1415927 * kww);     //p
+  ksf2 = (float)sin(3.1415927 * kww);     //q
+
+  ww = (float)pow(10.0,-3.0 + 2.2 * fParam8);
+  sf1 = (float)cos(3.1415927 * ww);     //p
+  sf2 = (float)sin(3.1415927 * ww);     //q
+  sf3 = 0.991f; //r
+  sfx = 0; ksfx = 0;
+  rec=0; recx=0; recpos=0;
+
+  mix = fParam12;
+  dyna = (float)pow(10.0,-1000.0/getSampleRate());
+  dynr = (float)pow(10.0,-6.0/getSampleRate());
+  dyne = 0.f; dynm = fParam10;
+}
+
+bool  mdaBeatBox::getProductString(char* text) { strcpy(text, "mda BeatBox"); return true; }
+bool  mdaBeatBox::getVendorString(char* text)  { strcpy(text, "mda"); return true; }
+bool  mdaBeatBox::getEffectName(char* name)    { strcpy(name, "BeatBox"); return true; }
+
+void mdaBeatBox::setProgramName(char *name)
+{
+	strcpy(programName, name);
+}
+
+void mdaBeatBox::getProgramName(char *name)
+{
+	strcpy(name, programName);
+}
+
+void mdaBeatBox::setParameter(LvzInt32 index, float value)
+{
+	switch(index)
+  {
+    case 0: fParam1 = value; break;
+    case 1: fParam2 = value; break;
+    case 2: fParam3 = value; break;
+    case 3: fParam4 = value; break;
+    case 4: fParam5 = value; break;
+    case 5: fParam6 = value; break;
+    case 6: fParam7 = value; break;
+    case 7: fParam8 = value; break;
+    case 8: fParam9 = value; break;
+    case 9: fParam10= value; break;
+    case 10:fParam11= value; break;
+    case 11:fParam12= value; break;
+  }
+  //calcs here
+  hthr = (float)pow(10.f, 2.f * fParam1 - 2.f);
+  hdel = (long)((0.04 + 0.20 * fParam2) * getSampleRate());
+  sthr = (float)(40.0 * pow(10.f, 2.f * fParam7 - 2.f));
+  kthr = (float)(220.0 * pow(10.f, 2.f * fParam4 - 2.f));
+
+  hlev = (float)(0.0001f + fParam3 * fParam3 * 4.f);
+  klev = (float)(0.0001f + fParam6 * fParam6 * 4.f);
+  slev = (float)(0.0001f + fParam9 * fParam9 * 4.f);
+ 
+  wwx=ww;
+  ww = (float)pow(10.0,-3.0 + 2.2 * fParam8);
+  sf1 = (float)cos(3.1415927 * ww);     //p
+  sf2 = (float)sin(3.1415927 * ww);     //q
+  //sfx = 0; ksfx = 0;
+
+  kwwx=kww;
+  kww = (float)pow(10.0,-3.0 + 2.2 * fParam5);
+  ksf1 = (float)cos(3.1415927 * kww);     //p
+  ksf2 = (float)sin(3.1415927 * kww);     //q
+
+  if(wwx != ww) sfx = (long)(2 * getSampleRate()); 
+  if(kwwx != kww) ksfx = (long)(2 * getSampleRate());
+  
+  rec = (long)(4.9 * fParam11); 
+  if ((rec!=recx) && (recpos>0)) //finish sample
+  {
+    switch(rec)
+    {
+       case 2: while(recpos<hbuflen) *(hbuf + recpos++) = 0.f; break;
+       case 3: while(recpos<kbuflen) *(kbuf + recpos++) = 0.f; break;
+       case 4: while(recpos<sbuflen) { *(sbuf  + recpos) = 0.f; 
+                           *(sbuf2 + recpos) = 0.f; recpos++; } break;
+    }
+  }
+  recpos=0; recx=rec;
+  mix = fParam12;
+  dynm = fParam10;
+}
+
+mdaBeatBox::~mdaBeatBox()
+{
+  if(hbuf) delete [] hbuf;
+  if(kbuf) delete [] kbuf;
+  if(sbuf) delete [] sbuf;
+  if(sbuf2) delete [] sbuf2;
+}
+
+void mdaBeatBox::suspend()
+{
+}
+
+void mdaBeatBox::synth()
+{
+	long t; 
+  float e=0.00012f, de, o, o1=0.f, o2=0.f, p=0.2f, dp; 
+
+  memset(hbuf, 0, hbuflen * sizeof(float)); //generate hi-hat
+  de = (float)pow(10.0,-36.0/getSampleRate());
+  for(t=0;t<5000;t++) 
+  { 
+    o = (float)((rand() % 2000) - 1000); 
+    *(hbuf + t) =  e * ( 2.f * o1 - o2 - o); 
+    e *= de; o2=o1; o1=o;
+  }
+
+  memset(kbuf, 0, kbuflen * sizeof(float)); //generate kick
+  de = (float)pow(10.0,-3.8/getSampleRate());
+  e=0.5f; dp = 1588.f / getSampleRate();
+  for(t=0;t<14000;t++) 
+  { 
+    *(kbuf + t) =  e * (float)sin(p); 
+    e *= de; p = (float)fmod(p + dp * e ,6.2831853f);
+  }
+
+  memset(sbuf, 0, sbuflen * sizeof(float)); //generate snare
+  de = (float)pow(10.0,-15.0/getSampleRate());
+  e=0.38f; dp = 1103.f / getSampleRate();
+  for(t=0;t<7000;t++) 
+  { 
+    o = (0.3f * o) + (float)((rand() % 2000) - 1000); 
+    *(sbuf + t) =  (float)(e * (sin(p) + 0.0004 * o)); 
+    *(sbuf2 + t) = *(sbuf + t);
+    e *= de; p = (float)fmod(p + 0.025,6.2831853);
+  }
+}
+
+float mdaBeatBox::getParameter(LvzInt32 index)
+{
+	float v=0;
+
+  switch(index)
+  {
+    case 0: v = fParam1; break;
+    case 1: v = fParam2; break;
+    case 2: v = fParam3; break;
+    case 3: v = fParam4; break;
+    case 4: v = fParam5; break;
+    case 5: v = fParam6; break;
+    case 6: v = fParam7; break;
+    case 7: v = fParam8; break;
+    case 8: v = fParam9; break;
+    case 9: v =fParam10; break;
+    case 10:v =fParam11; break;
+    case 11:v =fParam12; break;
+  }
+  return v;
+}
+
+void mdaBeatBox::getParameterName(LvzInt32 index, char *label)
+{
+	switch(index)
+  {
+    case 0:  strcpy(label, "Hat Thr"); break;
+    case 1:  strcpy(label, "Hat Rate"); break;
+    case 2:  strcpy(label, "Hat Mix"); break;
+    case 3:  strcpy(label, "Kik Thr"); break;
+    case 4:  strcpy(label, "Kik Trig"); break;
+    case 5:  strcpy(label, "Kik Mix"); break;
+    case 6:  strcpy(label, "Snr Thr"); break;
+    case 7:  strcpy(label, "Snr Trig"); break;
+    case 8:  strcpy(label, "Snr Mix"); break;
+    case 9:  strcpy(label, "Dynamics"); break;
+    case 10: strcpy(label, "Record:"); break;
+    case 11: strcpy(label, "Thru Mix"); break;
+  }
+}
+
+#include <stdio.h>
+void long2string(long value, char *string) { sprintf(string, "%ld", value); }
+void float2strng(float value, char *string) { sprintf(string, "%.2f", value); }
+
+void mdaBeatBox::getParameterDisplay(LvzInt32 index, char *text)
+{
+	switch(index)
+  {
+    case 0: float2strng((float)(40.0*fParam1 - 40.0),text); break;
+    case 1: long2string((long)(1000.f * hdel / getSampleRate()),text); break;
+    case 2: long2string((long)(20.f * log10(hlev)),text); break;
+    case 3: float2strng((float)(40.0*fParam4 - 40.0),text); break;
+    case 4: long2string((long)(0.5 * kww * getSampleRate()), text); break;
+    case 5: long2string((long)(20.f * log10(klev)),text); break;
+    case 6: float2strng((float)(40.0*fParam7 - 40.0),text); break;
+    case 7: long2string((long)(0.5 * ww * getSampleRate()), text); break;
+    case 8: long2string((long)(20.f * log10(slev)),text); break;
+    case 9: long2string((long)(100.f * fParam10),text); break; 
+    case 11: long2string((long)(20.f * log10(fParam12)),text); break;
+
+    case 10: switch(rec) 
+            { case 0: strcpy(text, "-"); break;
+              case 1: strcpy(text, "MONITOR"); break;
+              case 2: strcpy(text, "-> HAT"); break;
+              case 3: strcpy(text, "-> KIK"); break;
+              case 4: strcpy(text, "-> SNR"); break; } break;
+  }
+}
+
+void mdaBeatBox::getParameterLabel(LvzInt32 index, char *label)
+{
+	switch(index)
+  {
+    case 0: strcpy(label, "dB"); break;
+    case 1: strcpy(label, "ms"); break;
+    case 2: strcpy(label, "dB"); break; 
+    case 3: strcpy(label, "dB"); break; 
+    case 4: strcpy(label, "Hz"); break; 
+    case 5: strcpy(label, "dB"); break; 
+    case 6: strcpy(label, "dB"); break; 
+    case 7: strcpy(label, "Hz"); break;
+    case 8: strcpy(label, "dB"); break;
+    case 9: strcpy(label, "%"); break; 
+    case 10:strcpy(label, ""); break; 
+    case 11:strcpy(label, "dB"); break; 
+  }
+}
+
+//--------------------------------------------------------------------------------
+// process
+
+void mdaBeatBox::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, b, c, d, e, o, hf=hfil, ht=hthr, mx3=0.f, mx1=mix;
+  long hp=hbufpos, hl=hbuflen-2, hd=hdel;
+  float kt=kthr;
+  long kp=kbufpos, kl=kbuflen-2, kd=kdel;  
+  float st=sthr, s, f1=sb1, f2=sb2, b1=sf1, b2=sf2, b3=sf3;
+  float k, kf1=ksb1, kf2=ksb2, kb1=ksf1, kb2=ksf2;
+  float hlv=hlev, klv=klev, slv=slev; 
+  long sp=sbufpos, sl=sbuflen-2, sd=sdel;  
+  float ya=dyna, yr=dynr, ye=dyne, ym=dynm, mx4;
+    
+  if(sfx>0) { mx3=0.08f; slv=0.f; klv=0.f; hlv=0.f; mx1=0.f; sfx-=sampleFrames;} //key listen (snare)
+  if(ksfx>0) { mx3=0.03f; slv=0.f; klv=0.f; hlv=0.f; mx1=0.f; ksfx-=sampleFrames;
+               b1=ksf1; b2=ksf2; } //key listen (kick)
+
+  --in1;	
+	--in2;	
+	--out1;
+	--out2;
+
+  if(rec==0)
+  {
+	  while(--sampleFrames >= 0)
+	  {
+      a = *++in1; //input
+      b = *++in2;
+      e = a + b;
+    
+      ye = (e<ye)? ye * yr : e - ya * (e - ye); //dynamics envelope
+
+      hf = e - hf; //high
+      if((hp>hd) && (hf>ht)) hp=0; else { hp++; if(hp>hl)hp=hl; }
+      o = hlv * *(hbuf + hp);
+
+      k = e + (kf1 * kb1) - (kf2 * kb2);
+      kf2 = b3 * ((kf1 * kb2) + (kf2 * kb1)); 
+      kf1 = b3 * k;
+      if((kp>kd) && (k>kt)) kp=0; else { kp++; if(kp>kl)kp=kl; }
+      o += klv * *(kbuf + kp);
+    
+      s = hf + (0.3f * e) + (f1 * b1) - (f2 * b2);
+      f2 = b3 * ((f1 * b2) + (f2 * b1)); 
+      f1 = b3 * s;
+
+      if((sp>sd) && (s>st)) sp=0; else { sp++; if(sp>sl)sp=sl; }
+
+      mx4 = 1.f + ym * (ye + ye - 1.f); //dynamics
+
+      c = out1[1] + mx1*a + mx3*s + mx4*(o + slv * *(sbuf  + sp));
+		  d = out2[1] + mx1*b + mx3*s + mx4*(o + slv * *(sbuf2 + sp));
+      *++out1 = c;	
+		  *++out2 = d;	
+
+      hf=e;
+    }
+  }
+  else //record
+  {
+    while(--sampleFrames >= 0)
+	  {
+      
+      a = *++in1;
+      b = *++in2;
+      e = 0.5f * (a + b);
+
+      if((recpos==0) && (fabs(e) < 0.004)) e=0.f;
+      else 
+      { 
+       	switch(rec)
+        {
+           case 1: break; //echo
+           case 2: if(recpos<hl) *(hbuf + recpos++) = e; else e=0.f; break;
+           case 3: if(recpos<kl) *(kbuf + recpos++) = e; else e=0.f; break;
+           case 4: if(recpos<sl) 
+                   { *(sbuf+recpos)=a; *(sbuf2+recpos)=b; recpos++; }
+                   else e=0.f; break;
+        }
+      }
+      c = out1[1] + e;
+      d = out2[1] + e;
+      *++out1 = c;	
+	    *++out2 = d;	
+    }
+  }
+  hfil=hf; hbufpos=hp;
+  sbufpos=sp; sb1 = f1; sb2 = f2;
+  kbufpos=kp; ksb1 = f1; ksb2 = f2;
+  dyne=ye;
+}
+
+void mdaBeatBox::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, b, e, o, hf=hfil, ht=hthr, mx3=0.f, mx1=mix;
+  long hp=hbufpos, hl=hbuflen-2, hd=hdel;
+  float kt=kthr;
+  long kp=kbufpos, kl=kbuflen-2, kd=kdel;  
+  float st=sthr, s, f1=sb1, f2=sb2, b1=sf1, b2=sf2, b3=sf3;
+  float k, kf1=ksb1, kf2=ksb2, kb1=ksf1, kb2=ksf2;
+  float hlv=hlev, klv=klev, slv=slev; 
+  long sp=sbufpos, sl=sbuflen-2, sd=sdel;  
+  float ya=dyna, yr=dynr, ye=dyne, ym=dynm, mx4;
+
+  if(sfx>0) { mx3=0.08f; slv=0.f; klv=0.f; hlv=0.f; mx1=0.f; sfx-=sampleFrames;} //key listen (snare)
+  if(ksfx>0) { mx3=0.03f; slv=0.f; klv=0.f; hlv=0.f; mx1=0.f; ksfx-=sampleFrames;
+               b1=ksf1; b2=ksf2; } //key listen (kick)
+
+  --in1;	
+	--in2;	
+	--out1;
+	--out2;
+
+  if(rec==0)
+  {
+    while(--sampleFrames >= 0)
+	  {
+      a = *++in1;
+      b = *++in2;
+      e = a + b;
+    
+      ye = (e<ye)? ye * yr : e - ya * (e - ye); //dynamics envelope
+
+      hf = e - hf; //high filter
+      if((hp>hd) && (hf>ht)) hp=0; else { hp++; if(hp>hl)hp=hl; }
+      o = hlv * *(hbuf + hp); //hat
+  
+      k = e + (kf1 * kb1) - (kf2 * kb2); //low filter
+      kf2 = b3 * ((kf1 * kb2) + (kf2 * kb1)); 
+      kf1 = b3 * k;
+      if((kp>kd) && (k>kt)) kp=0; else { kp++; if(kp>kl)kp=kl; }
+      o += klv * *(kbuf + kp); //kick
+  
+      s = hf + (0.3f * e) + (f1 * b1) - (f2 * b2); //mid filter
+      f2 = b3 * ((f1 * b2) + (f2 * b1)); 
+      f1 = b3 * s;
+
+      if((sp>sd) && (s>st)) sp=0; else { sp++; if(sp>sl)sp=sl; }
+      
+      mx4 = 1.f + ym * (ye + ye - 1.f); //dynamics
+
+      *++out1 = mx1*a + mx3*s + mx4*(o + slv * *(sbuf  + sp));	
+		  *++out2 = mx1*a + mx3*s + mx4*(o + slv * *(sbuf2 + sp));	
+
+      hf=e;
+    }
+  }
+  else //record
+  {
+    while(--sampleFrames >= 0)
+	  {
+      a = *++in1;
+      b = *++in2;
+      e = 0.5f * (a + b);
+
+      if((recpos==0) && (fabs(e) < 0.004)) e=0.f;
+      else 
+      { 
+       	switch(rec)
+        {
+           case 1: break; //echo
+           case 2: if(recpos<hl) *(hbuf + recpos++) = e; else e=0.f; break;
+           case 3: if(recpos<kl) *(kbuf + recpos++) = e; else e=0.f; break;
+           case 4: if(recpos<sl) 
+                   { *(sbuf+recpos)=a; *(sbuf2+recpos)=b; recpos++; }
+                   else e=0.f; break;
+        }
+      }
+      *++out1 = e;	
+  	  *++out2 = e;	
+    }
+  }
+  hfil=hf; hbufpos=hp; 
+  sbufpos=sp; sb1 = f1; sb2 = f2;
+  kbufpos=kp; ksb1 = kf1; ksb2 = kf2;
+  dyne=ye;
+}
-- 
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