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-rw-r--r--src/mdaDetune.cpp359
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diff --git a/src/mdaDetune.cpp b/src/mdaDetune.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 "mdaDetune.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <float.h>
+#include <math.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+ return new mdaDetune(audioMaster);
+}
+
+bool mdaDetune::getProductString(char* text) { strcpy(text, "mda Detune"); return true; }
+bool mdaDetune::getVendorString(char* text) { strcpy(text, "mda"); return true; }
+bool mdaDetune::getEffectName(char* name) { strcpy(name, "Detune"); return true; }
+
+mdaDetune::mdaDetune(audioMasterCallback audioMaster): AudioEffectX(audioMaster, NPROGS, NPARAMS)
+{
+ setNumInputs(2);
+ setNumOutputs(2);
+ setUniqueID("mdaDetune"); ///identify mdaDetune-in here
+ DECLARE_LVZ_DEPRECATED(canMono) ();
+ canProcessReplacing();
+
+ programs[0].param[0] = 0.20f; //fine
+ programs[0].param[1] = 0.90f; //mix
+ programs[0].param[2] = 0.50f; //output
+ programs[0].param[3] = 0.50f; //chunksize
+ strcpy(programs[0].name, "Stereo Detune");
+ programs[1].param[0] = 0.20f;
+ programs[1].param[1] = 0.90f;
+ programs[1].param[2] = 0.50f;
+ programs[1].param[3] = 0.50f;
+ strcpy(programs[1].name,"Symphonic");
+ programs[2].param[0] = 0.8f;
+ programs[2].param[1] = 0.7f;
+ programs[2].param[2] = 0.50f;
+ programs[2].param[3] = 0.50f;
+ strcpy(programs[2].name,"Out Of Tune");
+
+ ///initialise...
+ curProgram=0;
+ suspend();
+
+ semi = 3.0f * 0.20f * 0.20f * 0.20f;
+ dpos2 = (float)pow(1.0594631f, semi);
+ dpos1 = 1.0f / dpos2;
+ wet = 1.0f;
+ dry = wet - wet * 0.90f * 0.90f;
+ wet = (wet + wet - wet * 0.90f) * 0.90f;
+}
+
+void mdaDetune::suspend() ///clear any buffers...
+{
+ memset(buf, 0, sizeof (buf));
+ memset(win, 0, sizeof (win));
+ pos0 = 0; pos1 = pos2 = 0.0f;
+
+ //recalculate crossfade window
+ buflen = 1 << (8 + (int32_t)(4.9f * programs[curProgram].param[3]));
+ if (buflen > BUFMAX) buflen = BUFMAX;
+ bufres = 1000.0f * (float)buflen / getSampleRate();
+
+ int32_t i; //hanning half-overlap-and-add
+ double p=0.0, dp=6.28318530718/buflen;
+ for(i=0;i<buflen;i++) { win[i] = (float)(0.5 - 0.5 * cos(p)); p+=dp; }
+}
+
+
+void mdaDetune::setProgram(int32_t program)
+{
+ if ((unsigned int)program < NPROGS)
+ {
+ curProgram = program;
+
+ // update
+ float * param = programs[curProgram].param;
+ semi = 3.0f * param[0] * param[0] * param[0];
+ dpos2 = (float)pow(1.0594631f, semi);
+ dpos1 = 1.0f / dpos2;
+
+ wet = (float)pow(10.0f, 2.0f * param[2] - 1.0f);
+ dry = wet - wet * param[1] * param[1];
+ wet = (wet + wet - wet * param[1]) * param[1];
+
+ int32_t tmp = 1 << (8 + (int32_t)(4.9f * param[3]));
+
+ if(tmp!=buflen) //recalculate crossfade window
+ {
+ buflen = tmp;
+ if (buflen > BUFMAX) buflen = BUFMAX;
+ bufres = 1000.0f * (float)buflen / getSampleRate();
+
+ int32_t i; //hanning half-overlap-and-add
+ double p=0.0, dp=6.28318530718/buflen;
+ for(i=0;i<buflen;i++) { win[i] = (float)(0.5 - 0.5 * cos(p)); p+=dp; }
+ }
+ }
+}
+
+
+void mdaDetune::setParameter(int32_t which, float value)
+{
+ float * param = programs[curProgram].param;
+ param[which] = value;
+
+ switch(which)
+ {
+ case 0:
+ semi = 3.0f * param[0] * param[0] * param[0];
+ dpos2 = (float)pow(1.0594631f, semi);
+ dpos1 = 1.0f / dpos2;
+ break;
+ case 1:
+ case 2:
+ wet = (float)pow(10.0f, 2.0f * param[2] - 1.0f);
+ dry = wet - wet * param[1] * param[1];
+ wet = (wet + wet - wet * param[1]) * param[1];
+ break;
+ case 3:
+ {
+ int32_t tmp = 1 << (8 + (int32_t)(4.9f * param[3]));
+
+ if(tmp!=buflen) //recalculate crossfade window
+ {
+ buflen = tmp;
+ if (buflen > BUFMAX) buflen = BUFMAX;
+ bufres = 1000.0f * (float)buflen / getSampleRate();
+
+ int32_t i; //hanning half-overlap-and-add
+ double p=0.0, dp=6.28318530718/buflen;
+ for(i=0;i<buflen;i++) { win[i] = (float)(0.5 - 0.5 * cos(p)); p+=dp; }
+ }
+ break;
+ }
+ default:
+ break;
+ }
+}
+
+
+float mdaDetune::getParameter(int32_t which) { return programs[curProgram].param[which]; }
+void mdaDetune::setProgramName(char *name) { strcpy(programs[curProgram].name, name); }
+void mdaDetune::getProgramName(char *name) { strcpy(name, programs[curProgram].name); }
+bool mdaDetune::getProgramNameIndexed (int32_t category, int32_t which, char* name)
+{
+ if ((unsigned int)which < NPROGS)
+ {
+ strcpy(name, programs[which].name);
+ return true;
+ }
+ return false;
+}
+
+
+void mdaDetune::getParameterName(int32_t which, char *label)
+{
+ switch(which)
+ {
+ case 0: strcpy(label, "Detune"); break;
+ case 1: strcpy(label, "Mix"); break;
+ case 2: strcpy(label, "Output"); break;
+ default: strcpy(label, "Latency");
+ }
+}
+
+
+void mdaDetune::getParameterDisplay(int32_t which, char *text)
+{
+ char string[16];
+
+ switch(which)
+ {
+ case 1: sprintf(string, "%.0f", 99.0f * programs[curProgram].param[which]); break;
+ case 2: sprintf(string, "%.1f", 40.0f * programs[curProgram].param[which] - 20.0f); break;
+ case 3: sprintf(string, "%.1f", bufres); break;
+ default: sprintf(string, "%.1f", 100.0f * semi);
+ }
+ string[8] = 0;
+ strcpy(text, (char *)string);
+}
+
+
+void mdaDetune::getParameterLabel(int32_t which, char *label)
+{
+ switch(which)
+ {
+ case 0: strcpy(label, "cents"); break;
+ case 1: strcpy(label, "%"); break;
+ case 2: strcpy(label, "dB"); break;
+ default: strcpy(label, "ms");
+ }
+}
+
+
+void mdaDetune::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 x, w=wet, y=dry, p1=pos1, p1f, d1=dpos1;
+ float p2=pos2, d2=dpos2;
+ int32_t p0=pos0, p1i, p2i;
+ int32_t l=buflen-1, lh=buflen>>1;
+ float lf = (float)buflen;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ b = *++in2;
+ c = out1[1];
+ d = out2[1];
+
+ c += y * a;
+ d += y * b;
+
+ --p0 &= l;
+ *(buf + p0) = w * (a + b); //input
+
+ p1 -= d1;
+ if(p1<0.0f) p1 += lf; //output
+ p1i = (int32_t)p1;
+ p1f = p1 - (float)p1i;
+ a = *(buf + p1i);
+ ++p1i &= l;
+ a += p1f * (*(buf + p1i) - a); //linear interpolation
+
+ p2i = (p1i + lh) & l; //180-degree ouptut
+ b = *(buf + p2i);
+ ++p2i &= l;
+ b += p1f * (*(buf + p2i) - b); //linear interpolation
+
+ p2i = (p1i - p0) & l; //crossfade window
+ x = *(win + p2i);
+ //++p2i &= l;
+ //x += p1f * (*(win + p2i) - x); //linear interpolation (doesn't do much)
+ c += b + x * (a - b);
+
+ p2 -= d2; //repeat for downwards shift - can't see a more efficient way?
+ if(p2<0.0f) p2 += lf; //output
+ p1i = (int32_t)p2;
+ p1f = p2 - (float)p1i;
+ a = *(buf + p1i);
+ ++p1i &= l;
+ a += p1f * (*(buf + p1i) - a); //linear interpolation
+
+ p2i = (p1i + lh) & l; //180-degree ouptut
+ b = *(buf + p2i);
+ ++p2i &= l;
+ b += p1f * (*(buf + p2i) - b); //linear interpolation
+
+ p2i = (p1i - p0) & l; //crossfade window
+ x = *(win + p2i);
+ //++p2i &= l;
+ //x += p1f * (*(win + p2i) - x); //linear interpolation (doesn't do much)
+ d += b + x * (a - b);
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+ pos0=p0; pos1=p1; pos2=p2;
+}
+
+
+void mdaDetune::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, c, d;
+ float x, w=wet, y=dry, p1=pos1, p1f, d1=dpos1;
+ float p2=pos2, d2=dpos2;
+ int32_t p0=pos0, p1i, p2i;
+ int32_t l=buflen-1, lh=buflen>>1;
+ float lf = (float)buflen;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0) //had to disable optimization /Og in MSVC++5!
+ {
+ a = *++in1;
+ b = *++in2;
+
+ c = y * a;
+ d = y * b;
+
+ --p0 &= l;
+ *(buf + p0) = w * (a + b); //input
+
+ p1 -= d1;
+ if(p1<0.0f) p1 += lf; //output
+ p1i = (int32_t)p1;
+ p1f = p1 - (float)p1i;
+ a = *(buf + p1i);
+ ++p1i &= l;
+ a += p1f * (*(buf + p1i) - a); //linear interpolation
+
+ p2i = (p1i + lh) & l; //180-degree ouptut
+ b = *(buf + p2i);
+ ++p2i &= l;
+ b += p1f * (*(buf + p2i) - b); //linear interpolation
+
+ p2i = (p1i - p0) & l; //crossfade
+ x = *(win + p2i);
+ //++p2i &= l;
+ //x += p1f * (*(win + p2i) - x); //linear interpolation (doesn't do much)
+ c += b + x * (a - b);
+
+ p2 -= d2; //repeat for downwards shift - can't see a more efficient way?
+ if(p2<0.0f) p2 += lf; //output
+ p1i = (int32_t)p2;
+ p1f = p2 - (float)p1i;
+ a = *(buf + p1i);
+ ++p1i &= l;
+ a += p1f * (*(buf + p1i) - a); //linear interpolation
+
+ p2i = (p1i + lh) & l; //180-degree ouptut
+ b = *(buf + p2i);
+ ++p2i &= l;
+ b += p1f * (*(buf + p2i) - b); //linear interpolation
+
+ p2i = (p1i - p0) & l; //crossfade
+ x = *(win + p2i);
+ //++p2i &= l;
+ //x += p1f * (*(win + p2i) - x); //linear interpolation (doesn't do much)
+ d += b + x * (a - b);
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+ pos0=p0; pos1=p1; pos2=p2;
+}
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