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-rw-r--r--src/mdaDegrade.cpp295
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diff --git a/src/mdaDegrade.cpp b/src/mdaDegrade.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 "mdaDegrade.h"
+
+#include <math.h>
+#include <float.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+ return new mdaDegrade(audioMaster);
+}
+
+mdaDegrade::mdaDegrade(audioMasterCallback audioMaster) : AudioEffectX(audioMaster, 1, 6) // programs, parameters
+{
+ //inits here!
+ fParam1 = (float)0.8; //clip
+ fParam2 = (float)0.50; //bits
+ fParam3 = (float)0.65; //rate
+ fParam4 = (float)0.9; //postfilt
+ fParam5 = (float)0.58; //non-lin
+ fParam6 = (float)0.5; //level
+
+ setNumInputs(2);
+ setNumOutputs(2);
+ setUniqueID("mdaDegrade"); // identify here
+ DECLARE_LVZ_DEPRECATED(canMono) ();
+ canProcessReplacing();
+ strcpy(programName, "Degrade");
+
+ buf0 = buf1 = buf2 = buf3 = buf4 = buf5 = buf6 = buf7 = buf8 = buf9 = 0.0f;
+
+ setParameter(5, 0.5f);
+}
+
+bool mdaDegrade::getProductString(char* text) { strcpy(text, "MDA Degrade"); return true; }
+bool mdaDegrade::getVendorString(char* text) { strcpy(text, "mda"); return true; }
+bool mdaDegrade::getEffectName(char* name) { strcpy(name, "Degrade"); return true; }
+
+void mdaDegrade::setParameter(int32_t index, float value)
+{
+ float f;
+
+ 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;
+ }
+ //calcs here
+ if(fParam3>0.5) { f = fParam3 - 0.5f; mode = 1.0f; }
+ else { f = 0.5f - fParam3; mode = 0.0f; }
+
+ tn = (int)exp(18.0f * f);
+
+ //tn = (int)(18.0 * fParam3 - 8.0); mode=1.f; }
+ // else { tn = (int)(10.0 - 18.0 * fParam3); mode=0.f; }
+ tcount = 1;
+ clp = (float)(pow(10.0,(-1.5 + 1.5 * fParam1)) );
+ fo2 = filterFreq((float)pow(10.0f, 2.30104f + 2.f*fParam4));
+ fi2 = (1.f-fo2); fi2=fi2*fi2; fi2=fi2*fi2;
+ float _g1 = (float)(pow(2.0,2.0 + int(fParam2*12.0)));
+ g2 = (float)(1.0/(2.0 * _g1));
+ if(fParam3>0.5) g1 = -_g1/(float)tn; else g1= -_g1;
+ g3 = (float)(pow(10.0,2.0*fParam6 - 1.0));
+ if(fParam5>0.5) { lin = (float)(pow(10.0,0.3 * (0.5 - fParam5))); lin2=lin; }
+ else { lin = (float)pow(10.0,0.3 * (fParam5 - 0.5)); lin2=1.0; }
+}
+
+mdaDegrade::~mdaDegrade()
+{
+}
+
+void mdaDegrade::suspend()
+{
+}
+
+float mdaDegrade::filterFreq(float hz)
+{
+ float j, k, r=0.999f;
+
+ j = r * r - 1;
+ k = (float)(2.f - 2.f * r * r * cos(0.647f * hz / getSampleRate() ));
+ return (float)((sqrt(k*k - 4.f*j*j) - k) / (2.f*j));
+}
+
+void mdaDegrade::setProgramName(char *name)
+{
+ strcpy(programName, name);
+}
+
+void mdaDegrade::getProgramName(char *name)
+{
+ strcpy(name, programName);
+}
+
+bool mdaDegrade::getProgramNameIndexed (int32_t category, int32_t index, char* name)
+{
+ if (index == 0)
+ {
+ strcpy(name, programName);
+ return true;
+ }
+ return false;
+}
+
+float mdaDegrade::getParameter(int32_t 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;
+ }
+ return v;
+}
+
+void mdaDegrade::getParameterName(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "Headroom"); break;
+ case 1: strcpy(label, "Quant"); break;
+ case 2: strcpy(label, "Rate"); break;
+ case 3: strcpy(label, "PostFilt"); break;
+ case 4: strcpy(label, "Non-Lin"); break;
+ case 5: strcpy(label, "Output"); break;
+ }
+}
+
+#include <stdio.h>
+static void int2strng(int32_t value, char *string) { sprintf(string, "%d", value); }
+
+void mdaDegrade::getParameterDisplay(int32_t index, char *text)
+{
+ switch(index)
+ {
+ case 0: int2strng((int32_t)(-30.0 * (1.0 - fParam1)), text); break;
+ case 1: int2strng((int32_t)(4.0 + 12.0 * fParam2), text); break;
+ case 2: int2strng((int32_t)(getSampleRate()/tn), text); break;
+ case 3: int2strng((int32_t)pow(10.0f, 2.30104f + 2.f*fParam4), text); break;
+ case 4: int2strng((int32_t)(200.0 * fabs(fParam5 - 0.5)), text); break;
+ case 5: int2strng((int32_t)(40.0 * fParam6 - 20.0), text); break;
+ }
+}
+
+void mdaDegrade::getParameterLabel(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "dB"); break;
+ case 1: strcpy(label, "bits"); break;
+ case 2: strcpy(label, "S<>S&&H"); break;
+ case 3: strcpy(label, "Hz"); break;
+ case 4: strcpy(label, "Odd<>Eve"); break;
+ }
+}
+
+//--------------------------------------------------------------------------------
+// process
+
+void mdaDegrade::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 b0=buf0, c, d, l=lin, l2=lin2;
+ float cl=clp, i2=fi2, o2=fo2;
+ float b1=buf1, b2=buf2, b3=buf3, b4=buf4, b5=buf5;
+ float b6=buf6, b7=buf7, b8=buf8, b9=buf9;
+ float gi=g1, go=g2, ga=g3, m=mode;
+ int n=tn, t=tcount;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0)
+ {
+ c = out1[1];
+ d = out2[1]; //process from here...
+
+ b0 = (*++in1 + *++in2) + m * b0;
+
+ if(t==n)
+ {
+ t=0;
+ b5 = (float)(go * int(b0 * gi));
+ if(b5>0)
+ { b5=(float)pow(b5,l2); if(b5>cl) b5=cl;}
+ else
+ { b5=-(float)pow(-b5,l); if(b5<-cl) b5=-cl; }
+ b0=0;
+ }
+ t=t+1;
+
+ b1 = i2 * (b5 * ga) + o2 * b1;
+ b2 = b1 + o2 * b2;
+ b3 = b2 + o2 * b3;
+ b4 = b3 + o2 * b4;
+ b6 = i2 * b4 + o2 * b6;
+ b7 = b6 + o2 * b7;
+ b8 = b7 + o2 * b8;
+ b9 = b8 + o2 * b9;
+
+ c += b9; // output
+ d += b9;
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+ if(fabs(b1)<1.0e-10)
+ { buf1=0.f; buf2=0.f; buf3=0.f; buf4=0.f; buf6=0.f; buf7=0.f;
+ buf8=0.f; buf9=0.f; buf0=0.f; buf5=0.f; }
+ else
+ { buf1=b1; buf2=b2; buf3=b3; buf4=b4; buf6=b6; buf7=b7;
+ buf8=b8, buf9=b9; buf0=b0; buf5=b5; tcount=t; }
+}
+
+void mdaDegrade::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 b0=buf0, l=lin, l2=lin2;
+ float cl=clp, i2=fi2, o2=fo2;
+ float b1=buf1, b2=buf2, b3=buf3, b4=buf4, b5=buf5;
+ float b6=buf6, b7=buf7, b8=buf8, b9=buf9;
+ float gi=g1, go=g2, ga=g3, m=mode;
+ int n=tn, t=tcount;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0)
+ {
+ b0 = (*++in1 + *++in2) + m * b0;
+
+ if(t==n)
+ {
+ t=0;
+ b5 = (float)(go * int(b0 * gi));
+ if(b5>0)
+ { b5=(float)pow(b5,l2); if(b5>cl) b5=cl;}
+ else
+ { b5=-(float)pow(-b5,l); if(b5<-cl) b5=-cl; }
+ b0=0;
+ }
+ t=t+1;
+
+ b1 = i2 * (b5 * ga) + o2 * b1;
+ b2 = b1 + o2 * b2;
+ b3 = b2 + o2 * b3;
+ b4 = b3 + o2 * b4;
+ b6 = i2 * b4 + o2 * b6;
+ b7 = b6 + o2 * b7;
+ b8 = b7 + o2 * b8;
+ b9 = b8 + o2 * b9;
+
+ *++out1 = b9;
+ *++out2 = b9;
+ }
+ if(fabs(b1)<1.0e-10)
+ { buf1=0.f; buf2=0.f; buf3=0.f; buf4=0.f; buf6=0.f; buf7=0.f;
+ buf8=0.f; buf9=0.f; buf0=0.f; buf5=0.f; }
+ else
+ { buf1=b1; buf2=b2; buf3=b3; buf4=b4; buf6=b6; buf7=b7;
+ buf8=b8, buf9=b9; buf0=b0; buf5=b5; tcount=t; }
+}
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