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-rw-r--r--src/mdaStereo.cpp362
1 files changed, 362 insertions, 0 deletions
diff --git a/src/mdaStereo.cpp b/src/mdaStereo.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 "mdaStereo.h"
+
+#include <math.h>
+#include <float.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+ return new mdaStereo(audioMaster);
+}
+
+mdaStereo::mdaStereo(audioMasterCallback audioMaster) : AudioEffectX(audioMaster, 1, 5) // programs, parameters
+ , fParam6(0.0f)
+{
+ //inits here!
+ fParam1 = (float)0.78; //Haas/Comb width
+ fParam2 = (float)0.43; //delay
+ fParam3 = (float)0.50; //balance
+ fParam4 = (float)0.00; //mod
+ fParam5 = (float)0.50; //rate
+
+ size = 4800;
+ bufpos = 0;
+ buffer = new float[size];
+
+ setNumInputs(2);
+ setNumOutputs(2);
+ setUniqueID("mdaStereo"); // identify here
+ DECLARE_LVZ_DEPRECATED(canMono) ();
+ canProcessReplacing();
+ strcpy(programName, "Stereo Simulator");
+ suspend(); // flush buffer
+
+ //calcs here!
+ phi=0;
+ dphi=(float)(3.141 * pow(10.0,-2.0 + 3.0 * fParam5) / getSampleRate());
+ mod=(float)(2100.0 * pow(fParam4, 2));
+
+ if(fParam1<0.5)
+ {
+ fli = (float)(0.25 + (1.5 * fParam1));
+ fld = 0.0;
+ fri = (float)(2.0 * fParam1);
+ frd = (float)(1.0 - fri);
+ }
+ else
+ {
+ fli = (float)(1.5 - fParam1);
+ fld = (float)(fParam1 - 0.5);
+ fri = fli;
+ frd = -fld;
+ }
+ fdel = (float)(20.0 + 2080.0 * pow(fParam2, 2));
+ if(fParam3>0.5)
+ {
+ fli *= (float)((1.0 - fParam3) * 2.0);
+ fld *= (float)((1.0 - fParam3) * 2.0);
+ }
+ else
+ {
+ fri *= (2 * fParam3);
+ frd *= (2 * fParam3);
+ }
+ fri *= (float)(0.5 + fabs(fParam1 - 0.5));
+ frd *= (float)(0.5 + fabs(fParam1 - 0.5));
+ fli *= (float)(0.5 + fabs(fParam1 - 0.5));
+ fld *= (float)(0.5 + fabs(fParam1 - 0.5));
+}
+
+//still do something sensible with stereo inputs? Haas?
+
+bool mdaStereo::getProductString(char* text) { strcpy(text, "MDA Stereo"); return true; }
+bool mdaStereo::getVendorString(char* text) { strcpy(text, "mda"); return true; }
+bool mdaStereo::getEffectName(char* name) { strcpy(name, "Stereo"); return true; }
+
+void mdaStereo::setParameter(int32_t 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;
+ }
+ //calcs here
+ dphi=(float)(3.141 * pow(10.0,-2.0 + 3.0 * fParam5) / getSampleRate());
+ mod=(float)(2100.0 * pow(fParam4, 2));
+
+ if(fParam1<0.5)
+ {
+ fli = (float)(0.25 + (1.5 * fParam1));
+ fld = 0.0;
+ fri = (float)(2.0 * fParam1);
+ frd = (float)(1.0 - fri);
+ }
+ else
+ {
+ fli = (float)(1.5 - fParam1);
+ fld = (float)(fParam1 - 0.5);
+ fri = fli;
+ frd = -fld;
+ }
+ fdel = (float)(20.0 + 2080.0 * pow(fParam2, 2));
+ if(fParam3>0.5)
+ {
+ fli *= (float)((1.0 - fParam3) * 2.0);
+ fld *= (float)((1.0 - fParam3) * 2.0);
+ }
+ else
+ {
+ fri *= (2 * fParam3);
+ frd *= (2 * fParam3);
+ }
+ fri *= (float)(0.5 + fabs(fParam1 - 0.5));
+ frd *= (float)(0.5 + fabs(fParam1 - 0.5));
+ fli *= (float)(0.5 + fabs(fParam1 - 0.5));
+ fld *= (float)(0.5 + fabs(fParam1 - 0.5));
+}
+
+mdaStereo::~mdaStereo()
+{
+ if(buffer) delete [] buffer;
+}
+
+void mdaStereo::suspend()
+{
+ memset(buffer, 0, size * sizeof(float));
+}
+
+void mdaStereo::setProgramName(char *name)
+{
+ strcpy(programName, name);
+}
+
+void mdaStereo::getProgramName(char *name)
+{
+ strcpy(name, programName);
+}
+
+bool mdaStereo::getProgramNameIndexed (int32_t category, int32_t index, char* name)
+{
+ if (index == 0)
+ {
+ strcpy(name, programName);
+ return true;
+ }
+ return false;
+}
+
+float mdaStereo::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;
+ }
+ return v;
+}
+
+void mdaStereo::getParameterName(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "Width"); break;
+ case 1: strcpy(label, "Delay"); break;
+ case 2: strcpy(label, "Balance"); break;
+ case 3: strcpy(label, "Mod"); break;
+ case 4: strcpy(label, "Rate"); 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 mdaStereo::getParameterDisplay(int32_t index, char *text)
+{
+ switch(index)
+ {
+ case 0: int2strng((int32_t)(200.0 * fabs(fParam1 - 0.5)), text);break;
+ case 1: float2strng((float)(1000.0 * fdel / getSampleRate()), text); break;
+ case 2: int2strng((int32_t)(200.0 * (fParam3 - 0.5)), text); break;
+ case 3: if(mod>0.f) float2strng((float)(1000.0 * mod / getSampleRate()), text);
+ else strcpy(text, "OFF");
+ break;
+ case 4: float2strng((float)pow(10.0,2.0 - 3.0 * fParam5), text); break;
+ }
+}
+
+void mdaStereo::getParameterLabel(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: if(fParam1<0.5) { strcpy(label, "Haas"); }
+ else { strcpy(label, "Comb"); } break;
+ case 1: strcpy(label, "ms"); break;
+ case 2: strcpy(label, ""); break;
+ case 3: strcpy(label, "ms"); break;
+ case 4: strcpy(label, "sec"); break;
+ }
+}
+
+//--------------------------------------------------------------------------------
+// process
+
+void mdaStereo::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 li, ld, ri, rd, del, ph=phi, dph=dphi, mo=mod;
+ int32_t tmp, bp = bufpos;
+
+ li = fli;
+ ld = fld;
+ ri = fri;
+ rd = frd;
+ del = fdel;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+
+ if(mo>0.f) //modulated delay
+ {
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1 + *++in2; //sum to mono
+
+ c = out1[1];
+ d = out2[1]; //process from here...
+
+ *(buffer + bp) = a; //write
+
+ tmp = (bp + (int)(del + fabs(mo * sin(ph)) ) ) % 4410;
+ b = *(buffer + tmp);
+ c += (a * li) - (b * ld); // output
+ d += (a * ri) - (b * rd);
+
+ bp = (bp - 1); if(bp < 0) bp = 4410; //buffer position
+
+ ph = ph + dph;
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+ }
+ else
+ {
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1 + *++in2; //sum to mono
+
+ c = out1[1];
+ d = out2[1]; //process from here...
+
+ *(buffer + bp) = a; //write
+
+ tmp = (bp + (int)(del) ) % 4410;
+ b = *(buffer + tmp);
+ c += (a * li) - (b * ld); // output
+ d += (a * ri) - (b * rd);
+
+ bp = (bp - 1); if(bp < 0) bp = 4410; //buffer position
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+ }
+ bufpos = bp;
+ phi = (float)fmod(ph,6.2831853f);
+}
+
+void mdaStereo::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 li, ld, ri, rd, del, ph=phi, dph=dphi, mo=mod;
+ int32_t tmp, bp = bufpos;
+
+ li = fli;
+ ld = fld;
+ ri = fri;
+ rd = frd;
+ del = fdel;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ if(mo>0.f) //modulated delay
+ {
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1 + *++in2; //sum to mono
+
+ *(buffer + bp) = a; //write
+ tmp = (bp + (int)(del + fabs(mo * sin(ph)) ) ) % 4410;
+ b = *(buffer + tmp);
+
+ c = (a * li) - (b * ld); // output
+ d = (a * ri) - (b * rd);
+
+ bp = (bp - 1); if(bp < 0) bp = 4410; //buffer position
+
+ ph = ph + dph;
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+ }
+ else
+ {
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1 + *++in2; //sum to mono
+
+ *(buffer + bp) = a; //write
+ tmp = (bp + (int)(del) ) % 4410;
+ b = *(buffer + tmp);
+
+ c = (a * li) - (b * ld); // output
+ d = (a * ri) - (b * rd);
+
+ bp = (bp - 1); if(bp < 0) bp = 4410; //buffer position
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+ }
+ bufpos = bp;
+ phi = (float)fmod(ph,6.2831853f);
+}
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