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-rw-r--r--src/mdaVocInput.cpp350
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diff --git a/src/mdaVocInput.cpp b/src/mdaVocInput.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 "mdaVocInput.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <float.h>
+#include <math.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+ return new mdaVocInput(audioMaster);
+}
+
+mdaVocInputProgram::mdaVocInputProgram() ///default program settings
+{
+ param[0] = 0.0f; //Tracking Off / On / Quant
+ param[1] = 0.50f; //Pitch
+ param[2] = 0.20f; //Breath Noise
+ param[3] = 0.50f; //Voiced/Unvoiced Thresh
+ param[4] = 0.35f; //Max Freq
+ strcpy(name, "Vocoder Carrier Signal");
+}
+
+
+mdaVocInput::mdaVocInput(audioMasterCallback audioMaster): AudioEffectX(audioMaster, NPROGS, NPARAMS)
+{
+ setNumInputs(2);
+ setNumOutputs(2);
+ setUniqueID("mdaVocInput"); ///identify plug-in here
+ DECLARE_LVZ_DEPRECATED(canMono) ();
+ canProcessReplacing();
+
+ track = 0;
+ pstep = pmult = sawbuf = noise = lenv = henv = 0.0f;
+ lbuf0 = lbuf1 = lbuf2 = lbuf3 = lfreq = vuv = maxp = minp = 0.0f;
+ root = 0.0;
+
+ programs = new mdaVocInputProgram[numPrograms];
+ setProgram(0);
+
+ suspend();
+}
+
+bool mdaVocInput::getProductString(char* text) { strcpy(text, "MDA VocInput"); return true; }
+bool mdaVocInput::getVendorString(char* text) { strcpy(text, "mda"); return true; }
+bool mdaVocInput::getEffectName(char* name) { strcpy(name, "VocInput"); return true; }
+
+void mdaVocInput::resume() ///update internal parameters...
+{
+ float fs, ifs;
+ float * param = programs[curProgram].param;
+ fs = getSampleRate();
+ ifs = 1.0f / fs;
+
+ track = (int32_t)(2.99f * param[0]);
+ pmult = (float)pow(1.0594631f, floor(48.0f * param[1] - 24.0f));
+ if(track==0) pstep = 110.0f * pmult * ifs;
+
+ noise = 6.0f * param[2];
+ lfreq = 660.0f * ifs;
+ minp = (float)pow(16.0f, 0.5f - param[4]) * fs / 440.0f;
+ maxp = 0.03f * fs;
+ root = log10(8.1757989f * ifs);
+ vuv = param[3] * param[3];
+}
+
+
+void mdaVocInput::suspend() ///clear any buffers...
+{
+ lbuf0 = lbuf1 = lbuf2 = lbuf3 = 0.0f;
+ pstep = sawbuf = lenv = 0.0f;
+}
+
+
+mdaVocInput::~mdaVocInput() ///destroy any buffers...
+{
+ if(programs) delete [] programs;
+}
+
+
+void mdaVocInput::setProgram(int32_t program)
+{
+ curProgram = program;
+ resume();
+}
+
+
+void mdaVocInput::setParameter(int32_t index, float value)
+{
+ programs[curProgram].param[index] = value;
+ resume();
+}
+float mdaVocInput::getParameter(int32_t index) { return programs[curProgram].param[index]; }
+void mdaVocInput::setProgramName(char *name) { strcpy(programs[curProgram].name, name); }
+void mdaVocInput::getProgramName(char *name) { strcpy(name, programs[curProgram].name); }
+bool mdaVocInput::getProgramNameIndexed (int32_t category, int32_t index, char* name)
+{
+ if ((unsigned int)index < NPROGS)
+ {
+ strcpy(name, programs[index].name);
+ return true;
+ }
+ return false;
+}
+
+void mdaVocInput::getParameterName(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "Tracking"); break;
+ case 1: strcpy(label, "Pitch"); break;
+ case 2: strcpy(label, "Breath"); break;
+ case 3: strcpy(label, "S Thresh"); break;
+ default: strcpy(label, "Max Freq");
+ }
+}
+
+
+void mdaVocInput::getParameterDisplay(int32_t index, char *text)
+{
+ char string[16];
+ float * param = programs[curProgram].param;
+
+ switch(index)
+ {
+ case 0: switch(track) { case 0: strcpy(string, "OFF"); break;
+ case 1: strcpy(string, "FREE"); break;
+ case 2: strcpy(string, "QUANT"); } break;
+
+ case 1: if(track) sprintf(string, "%d", (int32_t)(48.0f * param[1] - 24.0f));
+ else midi2string((int32_t)(48.0f * param[1] + 21.0f), string);
+ break;
+
+ case 4: midi2string((int32_t)(48.0f * param[4] + 45.0f), string); break;
+
+ default: sprintf(string, "%.0f", 100.0f * param[index]);
+ }
+ string[8] = 0;
+ strcpy(text, (char *)string);
+}
+
+
+void mdaVocInput::getParameterLabel(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, ""); break;
+ case 1: strcpy(label, ""); break;
+ case 4: strcpy(label, "Hz"); break;
+ default: strcpy(label, "%");
+ }
+}
+
+
+void mdaVocInput::midi2string(int32_t n, char *text) //show name of MIDI note number (60=C3)
+{
+ char t[8];
+ int32_t o, s, p=0;
+
+ t[p++] = ' ';
+ t[p++] = ' ';
+ t[p++] = ' ';
+
+ o = int(n/12.f); s = n-(12*o); o -= 2;
+
+ switch(s)
+ {
+ case 0: t[p++]='C'; break;
+ case 1: t[p++]='C'; t[p++]='#'; break;
+ case 2: t[p++]='D'; break;
+ case 3: t[p++]='D'; t[p++]='#'; break;
+ case 4: t[p++]='E'; break;
+ case 5: t[p++]='F'; break;
+ case 6: t[p++]='F'; t[p++]='#'; break;
+ case 7: t[p++]='G'; break;
+ case 8: t[p++]='G'; t[p++]='#'; break;
+ case 9: t[p++]='A'; break;
+ case 10: t[p++]='A'; t[p++]='#'; break;
+ default: t[p++]='B';
+ }
+ t[p++] = ' ';
+
+ if(o < 0) { t[p++] = '-'; o = -o; }
+ t[p++] = (char)(48 + (o % 10));
+
+ t[p] = 0;
+ strcpy(text, t);
+}
+
+
+void mdaVocInput::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;
+ float ds=pstep, s=sawbuf, n=noise;
+ float l0=lbuf0, l1=lbuf1, l2=lbuf2, l3=lbuf3;
+ float le=lenv, he=henv, et=lfreq*0.1f, lf=lfreq, v=vuv, mn=minp, mx=maxp;
+ float rootm=39.863137f;
+ int32_t tr=track;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ //b = *++in2;
+ c = out1[1];
+ d = out2[1];
+
+ l0 -= lf * (l1 + a); //fundamental filter (peaking 2nd-order 100Hz lpf)
+ l1 -= lf * (l1 - l0);
+
+ b = l0; if(b<0.0f) b = -b;
+ le -= et * (le - b); //fundamental level
+
+ b = (a + 0.03f) * v;
+ if(b<0.0f) b = -b;
+ he -= et * (he - b); //overall level (+ constant so >f0 when quiet)
+
+ l3 += 1.0f;
+ if(tr>0) //pitch tracking
+ {
+ if(l1>0.0f && l2<=0.0f) //found +ve zero crossing
+ {
+ if(l3>mn && l3<mx) //...in allowed range
+ {
+ mn = 0.6f * l3; //new max pitch to discourage octave jumps!
+ l2 = l1 / (l1 - l2); //fractional period...
+ ds = pmult / (l3 - l2); //new period
+
+ if(tr==2) //quantize pitch
+ {
+ ds = rootm * (float)(log10(ds) - root);
+ ds = (float)pow(1.0594631, floor(ds + 0.5) + rootm * root);
+ }
+ }
+ l3 = l2; //restart period measurement
+ }
+ l2=l1; //remember previous sample
+ }
+
+ b = 0.00001f * (float)((rand() & 32767) - 16384); //sibilance
+ if(le>he) b *= s * n; //...or modulated breath noise
+ b += s; s += ds; if(s>0.5f) s-=1.0f; //badly aliased sawtooth!
+
+ c += a;
+ d += b;
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+ sawbuf=s;
+
+ if(fabs(he)>1.0e-10) henv = he; else henv=0.0f; //catch denormals
+ if(fabs(l1)>1.0e-10) { lbuf0=l0; lbuf1=l1; lenv=le; } else { lbuf0 = lbuf1= lenv = 0.0f; }
+ lbuf2=l2, lbuf3=l3;
+ if(tr) pstep=ds;
+}
+
+
+void mdaVocInput::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;
+ float ds=pstep, s=sawbuf, n=noise;
+ float l0=lbuf0, l1=lbuf1, l2=lbuf2, l3=lbuf3;
+ float le=lenv, he=henv, et=lfreq*0.1f, lf=lfreq, v=vuv, mn=minp, mx=maxp;
+ float rootm=39.863137f;
+ int32_t tr=track;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ //b = *++in2;
+
+ l0 -= lf * (l1 + a); //fundamental filter (peaking 2nd-order 100Hz lpf)
+ l1 -= lf * (l1 - l0);
+
+ b = l0; if(b<0.0f) b = -b;
+ le -= et * (le - b); //fundamental level
+
+ b = (a + 0.03f) * v;
+ if(b<0.0f) b = -b;
+ he -= et * (he - b); //overall level (+ constant so >f0 when quiet)
+
+ l3 += 1.0f;
+ if(tr>0) //pitch tracking
+ {
+ if(l1>0.0f && l2<=0.0f) //found +ve zero crossing
+ {
+ if(l3>mn && l3<mx) //...in allowed range
+ {
+ mn = 0.6f * l3; //new max pitch to discourage octave jumps!
+ l2 = l1 / (l1 - l2); //fractional period...
+ ds = pmult / (l3 - l2); //new period
+
+ if(tr==2) //quantize pitch
+ {
+ ds = rootm * (float)(log10(ds) - root);
+ ds = (float)pow(1.0594631, floor(ds + 0.5) + rootm * root);
+ }
+ }
+ l3 = l2; //restart period measurement
+ }
+ l2=l1; //remember previous sample
+ }
+
+ b = 0.00001f * (float)((rand() & 32767) - 16384); //sibilance
+ if(le>he) b *= s * n; //...or modulated breath noise
+ b += s; s += ds; if(s>0.5f) s-=1.0f; //badly aliased sawtooth!
+
+ *++out1 = a;
+ *++out2 = b;
+ }
+ sawbuf=s;
+
+ if(fabs(he)>1.0e-10) henv = he; else henv=0.0f; //catch denormals
+ if(fabs(l1)>1.0e-10) { lbuf0=l0; lbuf1=l1; lenv=le; } else { lbuf0 = lbuf1= lenv = 0.0f; }
+ lbuf2=l2, lbuf3=l3;
+ if(tr) pstep=ds;
+}
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