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-rw-r--r--src/mdaAmbience.cpp305
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diff --git a/src/mdaAmbience.cpp b/src/mdaAmbience.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 "mdaAmbience.h"
+
+#include <stdio.h>
+#include <float.h>
+#include <math.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+ return new mdaAmbience(audioMaster);
+}
+
+mdaAmbience::mdaAmbience(audioMasterCallback audioMaster) : AudioEffectX(audioMaster, 1, 4) // programs, parameters
+{
+ //inits here!
+ fParam0 = 0.7f; //size
+ fParam1 = 0.7f; //hf
+ fParam2 = 0.9f; //mix
+ fParam3 = 0.5f; //output
+
+ size = 0;
+
+ buf1 = new float[1024];
+ buf2 = new float[1024];
+ buf3 = new float[1024];
+ buf4 = new float[1024];
+
+ fil = 0.0f;
+ den = pos=0;
+
+ setNumInputs(2);
+ setNumOutputs(2);
+ setUniqueID("mdaAmb"); // identify here
+ DECLARE_LVZ_DEPRECATED(canMono) ();
+ canProcessReplacing();
+ strcpy(programName, "Small Space Ambience");
+
+ suspend(); // flush buffer
+ setParameter(0, 0.7f); //go and set initial values!
+}
+
+void mdaAmbience::setParameter(int32_t index, float value)
+{
+ float tmp;
+
+ switch(index)
+ {
+ case 0: fParam0 = value; break;
+ case 1: fParam1 = value; break;
+ case 2: fParam2 = value; break;
+ case 3: fParam3 = value; break;
+ }
+ //calcs here
+ fbak = 0.8f;
+ damp = 0.05f + 0.9f * fParam1;
+ tmp = (float)pow(10.0f, 2.0f * fParam3 - 1.0f);
+ dry = tmp - fParam2 * fParam2 * tmp;
+ wet = (0.4f + 0.4f) * fParam2 * tmp;
+
+ tmp = 0.025f + 2.665f * fParam0;
+ if(size!=tmp) rdy=0; //need to flush buffer
+ size = tmp;
+}
+
+mdaAmbience::~mdaAmbience()
+{
+ if(buf1) delete [] buf1;
+ if(buf2) delete [] buf2;
+ if(buf3) delete [] buf3;
+ if(buf4) delete [] buf4;
+}
+
+bool mdaAmbience::getProductString(char* text) { strcpy(text, "MDA Ambience"); return true; }
+bool mdaAmbience::getVendorString(char* text) { strcpy(text, "mda"); return true; }
+bool mdaAmbience::getEffectName(char* name) { strcpy(name, "Ambience"); return true; }
+
+void mdaAmbience::suspend()
+{
+ memset(buf1, 0, 1024 * sizeof(float));
+ memset(buf2, 0, 1024 * sizeof(float));
+ memset(buf3, 0, 1024 * sizeof(float));
+ memset(buf4, 0, 1024 * sizeof(float));
+ rdy = 1;
+}
+
+void mdaAmbience::setProgramName(char *name)
+{
+ strcpy(programName, name);
+}
+
+void mdaAmbience::getProgramName(char *name)
+{
+ strcpy(name, programName);
+}
+
+bool mdaAmbience::getProgramNameIndexed (int32_t category, int32_t index, char* name)
+{
+ if (index == 0)
+ {
+ strcpy(name, programName);
+ return true;
+ }
+ return false;
+}
+
+float mdaAmbience::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;
+ }
+ return v;
+}
+
+void mdaAmbience::getParameterName(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "Size"); break;
+ case 1: strcpy(label, "HF Damp"); break;
+ case 2: strcpy(label, "Mix"); break;
+ case 3: strcpy(label, "Output"); break;
+ }
+}
+
+void mdaAmbience::getParameterDisplay(int32_t index, char *text)
+{
+ switch(index)
+ {
+ case 0: sprintf(text, "%.0f", 10.0f * fParam0); break;
+ case 1: sprintf(text, "%.0f", 100.0f * fParam1); break;
+ case 2: sprintf(text, "%.0f", 100.0f * fParam2); break;
+ case 3: sprintf(text, "%.0f", 40.0f * fParam3 - 20.0f); break;
+ }
+}
+
+void mdaAmbience::getParameterLabel(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "m"); break;
+ case 1: strcpy(label, "%"); break;
+ case 2: strcpy(label, "%"); break;
+ case 3: strcpy(label, "dB"); break;
+ }
+}
+
+//--------------------------------------------------------------------------------
+// process
+
+void mdaAmbience::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, r;
+ float t, f=fil, fb=fbak, dmp=damp, y=dry, w=wet;
+ int32_t p=pos, d1, d2, d3, d4;
+
+ if(rdy==0) suspend();
+
+ d1 = (p + (int32_t)(107 * size)) & 1023;
+ d2 = (p + (int32_t)(142 * size)) & 1023;
+ d3 = (p + (int32_t)(277 * size)) & 1023;
+ d4 = (p + (int32_t)(379 * size)) & 1023;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ b = *++in2;
+ c = out1[1];
+ d = out2[1]; //process from here...
+
+ f += dmp * (w * (a + b) - f); //HF damping
+ r = f;
+
+ t = *(buf1 + p);
+ r -= fb * t;
+ *(buf1 + d1) = r; //allpass
+ r += t;
+
+ t = *(buf2 + p);
+ r -= fb * t;
+ *(buf2 + d2) = r; //allpass
+ r += t;
+
+ t = *(buf3 + p);
+ r -= fb * t;
+ *(buf3 + d3) = r; //allpass
+ r += t;
+ c += y * a + r - f; //left output
+
+ t = *(buf4 + p);
+ r -= fb * t;
+ *(buf4 + d4) = r; //allpass
+ r += t;
+ d += y * b + r - f; //right output
+
+ ++p &= 1023;
+ ++d1 &= 1023;
+ ++d2 &= 1023;
+ ++d3 &= 1023;
+ ++d4 &= 1023;
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+ pos=p;
+ if(fabs(f)>1.0e-10) { fil=f; den=0; } //catch denormals
+ else { fil=0.0f; if(den==0) { den=1; suspend(); } }
+}
+
+void mdaAmbience::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, r;
+ float t, f=fil, fb=fbak, dmp=damp, y=dry, w=wet;
+ int32_t p=pos, d1, d2, d3, d4;
+
+ if(rdy==0) suspend();
+
+ d1 = (p + (int32_t)(107 * size)) & 1023;
+ d2 = (p + (int32_t)(142 * size)) & 1023;
+ d3 = (p + (int32_t)(277 * size)) & 1023;
+ d4 = (p + (int32_t)(379 * size)) & 1023;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ b = *++in2;
+
+ f += dmp * (w * (a + b) - f); //HF damping
+ r = f;
+
+ t = *(buf1 + p);
+ r -= fb * t;
+ *(buf1 + d1) = r; //allpass
+ r += t;
+
+ t = *(buf2 + p);
+ r -= fb * t;
+ *(buf2 + d2) = r; //allpass
+ r += t;
+
+ t = *(buf3 + p);
+ r -= fb * t;
+ *(buf3 + d3) = r; //allpass
+ r += t;
+ a = y * a + r - f; //left output
+
+ t = *(buf4 + p);
+ r -= fb * t;
+ *(buf4 + d4) = r; //allpass
+ r += t;
+ b = y * b + r - f; //right output
+
+ ++p &= 1023;
+ ++d1 &= 1023;
+ ++d2 &= 1023;
+ ++d3 &= 1023;
+ ++d4 &= 1023;
+
+ *++out1 = a;
+ *++out2 = b;
+ }
+ pos=p;
+ if(fabs(f)>1.0e-10) { fil=f; den=0; } //catch denormals
+ else { fil=0.0f; if(den==0) { den=1; suspend(); } }
+}
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