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-rw-r--r--src/mdaTransient.cpp271
1 files changed, 271 insertions, 0 deletions
diff --git a/src/mdaTransient.cpp b/src/mdaTransient.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 "mdaTransient.h"
+
+#include <math.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+ return new mdaTransient(audioMaster);
+}
+
+mdaTransient::mdaTransient(audioMasterCallback audioMaster) : AudioEffectX(audioMaster, 1, 6)
+{
+ fParam1 = (float)0.50; //attack
+ fParam2 = (float)0.50; //release
+ fParam3 = (float)0.50; //output
+ fParam4 = (float)0.49; //filter
+ fParam5 = (float)0.35; //att-rel
+ fParam6 = (float)0.35; //rel-att
+
+ setNumInputs(2); // stereo in
+ setNumOutputs(2); // stereo out
+ setUniqueID("mdaTransient"); // identify
+ DECLARE_LVZ_DEPRECATED(canMono) ();
+ canProcessReplacing(); // supports both accumulating and replacing output
+ strcpy(programName, "Transient Processor"); // default program name
+
+ dry = att1 = att2 = rel12 = att34 = rel3 = rel4 = 0.0f;
+ env1 = env2 = env3 = env4 = fili = filo = filx = fbuf1 = fbuf2 = 0.0f;
+ setParameter(0, 0.5f);
+}
+
+mdaTransient::~mdaTransient()
+{
+ // nothing to do here
+}
+
+bool mdaTransient::getProductString(char* text) { strcpy(text, "MDA Transient"); return true; }
+bool mdaTransient::getVendorString(char* text) { strcpy(text, "mda"); return true; }
+bool mdaTransient::getEffectName(char* name) { strcpy(name, "Transient"); return true; }
+
+void mdaTransient::setProgramName(char *name)
+{
+ strcpy(programName, name);
+}
+
+void mdaTransient::getProgramName(char *name)
+{
+ strcpy(name, programName);
+}
+
+bool mdaTransient::getProgramNameIndexed (int32_t category, int32_t index, char* name)
+{
+ if (index == 0)
+ {
+ strcpy(name, programName);
+ return true;
+ }
+ return false;
+}
+
+void mdaTransient::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;
+ case 5: fParam6 = value; break;
+ }
+ //calcs here
+ dry = (float)(pow(10.0, (2.0 * fParam3) - 1.0));
+ if(fParam4>0.50)
+ {
+ fili = 0.8f - 1.6f*fParam4;
+ filo = 1.f + fili;
+ filx = 1.f;
+ }
+ else
+ {
+ fili = 0.1f + 1.8f*fParam4;
+ filo = 1.f - fili;
+ filx = 0.f;
+ }
+
+ if(fParam1>0.5)
+ {
+ att1 = (float)pow(10.0, -1.5);
+ att2 = (float)pow(10.0, 1.0 - 5.0 * fParam1);
+ }
+ else
+ {
+ att1 = (float)pow(10.0, -4.0 + 5.0 * fParam1);
+ att2 = (float)pow(10.0, -1.5);
+ }
+ rel12 = 1.f - (float)pow(10.0, -2.0 - 4.0 * fParam5);
+
+ if(fParam2>0.5)
+ {
+ rel3 = 1.f - (float)pow(10.0, -4.5);
+ rel4 = 1.f - (float)pow(10.0, -5.85 + 2.7 * fParam2);
+ }
+ else
+ {
+ rel3 = 1.f - (float)pow(10.0, -3.15 - 2.7 * fParam2);
+ rel4 = 1.f - (float)pow(10.0, -4.5);
+ }
+ att34 = (float)pow(10.0, - 4.0 * fParam6);
+}
+
+float mdaTransient::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 mdaTransient::getParameterName(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "Attack"); break;
+ case 1: strcpy(label, "Release"); break;
+ case 2: strcpy(label, "Output"); break;
+ case 3: strcpy(label, "Filter"); break;
+ case 4: strcpy(label, "Att Hold"); break;
+ case 5: strcpy(label, "Rel Hold"); break;
+ }
+}
+
+#include <stdio.h>
+static void int2strng(int32_t value, char *string) { sprintf(string, "%d", value); }
+
+void mdaTransient::getParameterDisplay(int32_t index, char *text)
+{
+ switch(index)
+ {
+ case 0: int2strng((int32_t)(200*fParam1 - 100),text); break;
+ case 1: int2strng((int32_t)(200*fParam2 - 100),text); break;
+ case 2: int2strng((int32_t)(40.0*fParam3 - 20.0),text); break;
+ case 3: int2strng((int32_t)(20*fParam4 - 10),text); break;
+ case 4: int2strng((int32_t)(100*fParam5),text); break;
+ case 5: int2strng((int32_t)(100*fParam6),text); break;
+ }
+
+}
+
+void mdaTransient::getParameterLabel(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "%"); break;
+ case 1: strcpy(label, "%"); break;
+ case 2: strcpy(label, "dB"); break;
+ case 3: strcpy(label, "Lo <> Hi"); break;
+ case 4: strcpy(label, "%"); break;
+ case 5: strcpy(label, "%"); break;
+ }
+}
+
+//--------------------------------------------------------------------------------
+// process
+
+void mdaTransient::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, e, f, g, i;
+ float e1=env1, e2=env2, e3=env3, e4=env4, y=dry;
+ float a1=att1, a2=att2, r12=rel12, a34=att34, r3=rel3, r4=rel4;
+ float fi=fili, fo=filo, fx=filx, fb1=fbuf1, fb2=fbuf2;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ b = *++in2;
+ c = out1[1];
+ d = out1[2];
+
+ fb1 = fo*fb1 + fi*a;
+ fb2 = fo*fb2 + fi*b;
+ e = fb1 + fx*a;
+ f = fb2 + fx*b;
+
+ i = a + b; i = (i>0)? i : -i;
+ e1 = (i>e1)? e1 + a1 * (i-e1) : e1 * r12;
+ e2 = (i>e2)? e2 + a2 * (i-e2) : e2 * r12;
+ e3 = (i>e3)? e3 + a34 * (i-e3) : e3 * r3;
+ e4 = (i>e4)? e4 + a34 * (i-e4) : e4 * r4;
+ g = (e1 - e2 + e3 - e4);
+
+ *++out1 = c + y * (a + e * g);
+ *++out2 = d + y * (b + f * g);
+ }
+ if(e1<1.0e-10) { env1=0.f; env2=0.f; env3=0.f; env4=0.f; fbuf1=0.f; fbuf2=0.f; }
+ else { env1=e1; env2=e2; env3=e3; env4=e4; fbuf1=fb1; fbuf2=fb2; }
+}
+
+void mdaTransient::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, e, f, g, i;
+ float e1=env1, e2=env2, e3=env3, e4=env4, y=dry;
+ float a1=att1, a2=att2, r12=rel12, a34=att34, r3=rel3, r4=rel4;
+ float fi=fili, fo=filo, fx=filx, fb1=fbuf1, fb2=fbuf2;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ b = *++in2;
+
+ fb1 = fo*fb1 + fi*a;
+ fb2 = fo*fb2 + fi*b;
+ e = fb1 + fx*a;
+ f = fb2 + fx*b;
+
+ i = a + b; i = (i>0)? i : -i;
+ e1 = (i>e1)? e1 + a1 * (i-e1) : e1 * r12;
+ e2 = (i>e2)? e2 + a2 * (i-e2) : e2 * r12;
+ e3 = (i>e3)? e3 + a34 * (i-e3) : e3 * r3;
+ e4 = (i>e4)? e4 + a34 * (i-e4) : e4 * r4;
+ g = (e1 - e2 + e3 - e4);
+
+ *++out1 = y * (a + e * g);
+ *++out2 = y * (b + f * g);
+ }
+ if(e1<1.0e-10) { env1=0.f; env2=0.f; env3=0.f; env4=0.f; fbuf1=0.f; fbuf2=0.f; }
+ else { env1=e1; env2=e2; env3=e3; env4=e4; fbuf1=fb1; fbuf2=fb2; }
+}
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