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-rw-r--r--src/mdaDubDelay.cpp329
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diff --git a/src/mdaDubDelay.cpp b/src/mdaDubDelay.cpp
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+/*
+ Copyright 2008-2011 David Robillard <http://drobilla.net>
+ Copyright 1999-2000 Paul Kellett (Maxim Digital Audio)
+
+ This is free software: you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ This software is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this software. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "mdaDubDelay.h"
+
+#include <math.h>
+#include <float.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+ return new mdaDubDelay(audioMaster);
+}
+
+mdaDubDelay::mdaDubDelay(audioMasterCallback audioMaster) : AudioEffectX(audioMaster, 1, 7) // programs, parameters
+{
+ //inits here!
+ fParam0 = 0.30f; //delay
+ fParam1 = 0.70f; //feedback
+ fParam2 = 0.40f; //tone
+ fParam3 = 0.00f; //lfo depth
+ fParam4 = 0.50f; //lfo speed
+ fParam5 = 0.33f; //wet mix
+ fParam6 = 0.50f; //output
+ ///CHANGED///too long?
+ size = 323766; //705600; //95998; //32766; //set max delay time at max sample rate
+ buffer = new float[size + 2]; //spare just in case!
+ ipos = 0;
+ fil0 = 0.0f;
+ env = 0.0f;
+ phi = 0.0f;
+ dlbuf= 0.0f;
+
+ setNumInputs(2);
+ setNumOutputs(2);
+ setUniqueID("mdaDubDelay"); //identify here
+ DECLARE_LVZ_DEPRECATED(canMono) ();
+ canProcessReplacing();
+ strcpy(programName, "Dub Feedback Delay");
+
+ suspend(); //flush buffer
+ setParameter(0, 0.5);
+}
+
+bool mdaDubDelay::getProductString(char* text) { strcpy(text, "MDA DubDelay"); return true; }
+bool mdaDubDelay::getVendorString(char* text) { strcpy(text, "mda"); return true; }
+bool mdaDubDelay::getEffectName(char* name) { strcpy(name, "DubDelay"); return true; }
+
+void mdaDubDelay::setParameter(int32_t index, float value)
+{
+ float fs=getSampleRate();
+ if(fs < 8000.0f) fs = 44100.0f; //??? bug somewhere!
+
+ switch(index)
+ {
+ case 0: fParam0 = value; break;
+ case 1: fParam1 = value; break;
+ case 2: fParam2 = value; break;
+ case 3: fParam3 = value; break;
+ case 4: fParam4 = value; break;
+ case 5: fParam5 = value; break;
+ case 6: fParam6 = value; break;
+ }
+ //calcs here
+ ///CHANGED///del = fParam0 * fParam0 * fParam0 * (float)size;
+ del = fParam0 * fParam0 * (float)size;
+ mod = 0.049f * fParam3 * del;
+
+ fil = fParam2;
+ if(fParam2>0.5f) //simultaneously change crossover frequency & high/low mix
+ {
+ fil = 0.5f * fil - 0.25f;
+ lmix = -2.0f * fil;
+ hmix = 1.0f;
+ }
+ else
+ {
+ hmix = 2.0f * fil;
+ lmix = 1.0f - hmix;
+ }
+ fil = (float)exp(-6.2831853f * pow(10.0f, 2.2f + 4.5f * fil) / fs);
+
+ fbk = (float)fabs(2.2f * fParam1 - 1.1f);
+ if(fParam1>0.5f) rel=0.9997f; else rel=0.8f; //limit or clip
+
+ wet = 1.0f - fParam5;
+ wet = fParam6 * (1.0f - wet * wet); //-3dB at 50% mix
+ dry = fParam6 * 2.0f * (1.0f - fParam5 * fParam5);
+
+ dphi = 628.31853f * (float)pow(10.0f, 3.0f * fParam4 - 2.0f) / fs; //100-sample steps
+}
+
+mdaDubDelay::~mdaDubDelay()
+{
+ if(buffer) delete [] buffer;
+}
+
+void mdaDubDelay::suspend()
+{
+ memset(buffer, 0, size * sizeof(float));
+}
+
+void mdaDubDelay::setProgramName(char *name)
+{
+ strcpy(programName, name);
+}
+
+void mdaDubDelay::getProgramName(char *name)
+{
+ strcpy(name, programName);
+}
+
+bool mdaDubDelay::getProgramNameIndexed (int32_t category, int32_t index, char* name)
+{
+ if (index == 0)
+ {
+ strcpy(name, programName);
+ return true;
+ }
+ return false;
+}
+
+float mdaDubDelay::getParameter(int32_t index)
+{
+ float v=0;
+
+ switch(index)
+ {
+ case 0: v = fParam0; break;
+ case 1: v = fParam1; break;
+ case 2: v = fParam2; break;
+ case 3: v = fParam3; break;
+ case 4: v = fParam4; break;
+ case 5: v = fParam5; break;
+ case 6: v = fParam6; break;
+ }
+ return v;
+}
+
+void mdaDubDelay::getParameterName(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "Delay"); break;
+ case 1: strcpy(label, "Feedback"); break;
+ case 2: strcpy(label, "Fb Tone"); break;
+ case 3: strcpy(label, "LFO Depth"); break;
+ case 4: strcpy(label, "LFO Rate"); break;
+ case 5: strcpy(label, "FX Mix"); break;
+ case 6: strcpy(label, "Output"); break;
+ }
+}
+
+#include <stdio.h>
+static void int2strng(int32_t value, char *string) { sprintf(string, "%d", value); }
+static void float2strng(float value, char *string) { sprintf(string, "%.2f", value); }
+
+void mdaDubDelay::getParameterDisplay(int32_t index, char *text)
+{
+ switch(index)
+ {
+ case 0: int2strng((int32_t)(del * 1000.0f / getSampleRate()), text); break;
+ case 1: int2strng((int32_t)(220 * fParam1 - 110), text); break;
+ case 2: int2strng((int32_t)(200 * fParam2 - 100), text); break;
+ case 3: int2strng((int32_t)(100 * fParam3), text); break;
+ case 4: float2strng((float)pow(10.0f, 2.0f - 3.0f * fParam4), text); break;
+ case 5: int2strng((int32_t)(100 * fParam5), text); break;
+ case 6: int2strng((int32_t)(20 * log10(2.0 * fParam6)), text); break;
+ }
+}
+
+void mdaDubDelay::getParameterLabel(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "ms"); break;
+ case 1: strcpy(label, "Sat<>Lim"); break;
+ case 2: strcpy(label, "Lo <> Hi"); break;
+ case 4: strcpy(label, "sec."); break;
+ case 6: strcpy(label, "dB"); break;
+ default: strcpy(label, "%"); break;
+ }
+}
+
+//--------------------------------------------------------------------------------
+// process
+
+void mdaDubDelay::process(float **inputs, float **outputs, int32_t sampleFrames)
+{
+ float *in1 = inputs[0];
+ float *in2 = inputs[1];
+ float *out1 = outputs[0];
+ float *out2 = outputs[1];
+ float a, b, c, d, ol, w=wet, y=dry, fb=fbk, dl=dlbuf, db=dlbuf, ddl=0.0f;
+ float lx=lmix, hx=hmix, f=fil, f0=fil0, tmp;
+ float e=env, g, r=rel; //limiter envelope, gain, release
+ float twopi=6.2831853f;
+ int32_t i=ipos, l, s=size, k=0;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ b = *++in2;
+ c = out1[1];
+ d = out2[1];
+
+ if(k==0) //update delay length at slower rate (could be improved!)
+ {
+ db += 0.01f * (del - db - mod - mod * (float)sin(phi)); //smoothed delay+lfo
+ ddl = 0.01f * (db - dl); //linear step
+ phi+=dphi; if(phi>twopi) phi-=twopi;
+ k=100;
+ }
+ k--;
+ dl += ddl; //lin interp between points
+
+ i--; if(i<0) i=s; //delay positions
+
+ l = (int32_t)dl;
+ tmp = dl - (float)l; //remainder
+ l += i; if(l>s) l-=(s+1);
+
+ ol = *(buffer + l); //delay output
+
+ l++; if(l>s) l=0;
+ ol += tmp * (*(buffer + l) - ol); //lin interp
+
+ tmp = a + fb * ol; //mix input (left only!) & feedback
+
+ f0 = f * (f0 - tmp) + tmp; //low-pass filter
+ tmp = lx * f0 + hx * tmp;
+
+ g =(tmp<0.0f)? -tmp : tmp; //simple limiter
+ e *= r; if(g>e) e = g;
+ if(e>1.0f) tmp /= e;
+
+ *(buffer + i) = tmp; //delay input
+
+ ol *= w; //wet
+
+ *++out1 = c + y * a + ol; //dry
+ *++out2 = d + y * b + ol;
+ }
+ ipos = i;
+ dlbuf=dl;
+ if(fabs(f0)<1.0e-10) { fil0=0.0f; env=0.0f; } else { fil0=f0; env=e; } //trap denormals
+}
+
+void mdaDubDelay::processReplacing(float **inputs, float **outputs, int32_t sampleFrames)
+{
+ float *in1 = inputs[0];
+ float *in2 = inputs[1];
+ float *out1 = outputs[0];
+ float *out2 = outputs[1];
+ float a, b, ol, w=wet, y=dry, fb=fbk, dl=dlbuf, db=dlbuf, ddl=0.0f;
+ float lx=lmix, hx=hmix, f=fil, f0=fil0, tmp;
+ float e=env, g, r=rel; //limiter envelope, gain, release
+ float twopi=6.2831853f;
+ int32_t i=ipos, l, s=size, k=0;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ b = *++in2;
+
+ if(k==0) //update delay length at slower rate (could be improved!)
+ {
+ db += 0.01f * (del - db - mod - mod * (float)sin(phi)); //smoothed delay+lfo
+ ddl = 0.01f * (db - dl); //linear step
+ phi+=dphi; if(phi>twopi) phi-=twopi;
+ k=100;
+ }
+ k--;
+ dl += ddl; //lin interp between points
+
+ i--; if(i<0) i=s; //delay positions
+
+ l = (int32_t)dl;
+ tmp = dl - (float)l; //remainder
+ l += i; if(l>s) l-=(s+1);
+
+ ol = *(buffer + l); //delay output
+
+ l++; if(l>s) l=0;
+ ol += tmp * (*(buffer + l) - ol); //lin interp
+
+ tmp = a + fb * ol; //mix input (left only!) & feedback
+
+ f0 = f * (f0 - tmp) + tmp; //low-pass filter
+ tmp = lx * f0 + hx * tmp;
+
+ g =(tmp<0.0f)? -tmp : tmp; //simple limiter
+ e *= r; if(g>e) e = g;
+ if(e>1.0f) tmp /= e;
+
+ *(buffer + i) = tmp; //delay input
+
+ ol *= w; //wet
+
+ *++out1 = y * a + ol; //dry
+ *++out2 = y * b + ol;
+ }
+ ipos = i;
+ dlbuf=dl;
+ if(fabs(f0)<1.0e-10) { fil0=0.0f; env=0.0f; } else { fil0=f0; env=e; } //trap denormals
+}
+
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