/* Copyright 2008-2011 David Robillard 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 . */ #include "mdaDelay.h" #include #include AudioEffect *createEffectInstance(audioMasterCallback audioMaster) { return new mdaDelay(audioMaster); } mdaDelay::mdaDelay(audioMasterCallback audioMaster) : AudioEffectX(audioMaster, 1, 6) // programs, parameters { //inits here! fParam0 = 0.50f; //left delay fParam1 = 0.27f; //right ratio fParam2 = 0.70f; //feedback fParam3 = 0.50f; //tone fParam4 = 0.33f; //wet mix fParam5 = 0.50f; //output size = 32766; //set max delay time at max sample rate buffer = new float[size + 2]; //spare just in case! ipos = 0; fil0 = 0.0f; setNumInputs(2); setNumOutputs(2); setUniqueID("mdaDelay"); //identify here DECLARE_LVZ_DEPRECATED(canMono) (); canProcessReplacing(); strcpy(programName, "Delay"); suspend(); //flush buffer setParameter(0, 0.5); } bool mdaDelay::getProductString(char* text) { strcpy(text, "MDA Delay"); return true; } bool mdaDelay::getVendorString(char* text) { strcpy(text, "mda"); return true; } bool mdaDelay::getEffectName(char* name) { strcpy(name, "Delay"); return true; } void mdaDelay::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; case 4: fParam4 = value; break; case 5: fParam5 = value; break; } //calcs here ldel = (int32_t)(size * fParam0 * fParam0); if(ldel<4) ldel=4; switch(int(fParam1 * 17.9f)) //fixed left/right ratios { case 17: tmp = 0.5000f; break; case 16: tmp = 0.6667f; break; case 15: tmp = 0.7500f; break; case 14: tmp = 0.8333f; break; case 13: tmp = 1.0000f; break; case 12: tmp = 1.2000f; break; case 11: tmp = 1.3333f; break; case 10: tmp = 1.5000f; break; case 9: tmp = 2.0000f; break; default: tmp = 4.0f * fParam1; break; //variable ratio } rdel = (int32_t)(size * fParam0 * fParam0 * tmp); if(rdel>size) rdel=size; if(rdel<4) rdel=4; fil = fParam3; if(fParam3>0.5f) //simultaneously change crossover frequency & high/low mix { fil = 0.5f * fil - 0.25f; lmix = -2.0f * fil; hmix = 1.0f; } else { hmix = 2.0f * fil; lmix = 1.0f - hmix; } fil = (float)exp(-6.2831853f * pow(10.0f, 2.2f + 4.5f * fil) / getSampleRate()); fbk = 0.495f * fParam2; wet = 1.0f - fParam4; wet = fParam5 * (1.0f - wet * wet); //-3dB at 50% mix dry = fParam5 * 2.0f * (1.0f - fParam4 * fParam4); //if(fParam2>0.99) { fbk=0.5f; wet=0.0f; } //freeze } mdaDelay::~mdaDelay() { if(buffer) delete [] buffer; } void mdaDelay::suspend() { memset(buffer, 0, size * sizeof(float)); } void mdaDelay::setProgramName(char *name) { strcpy(programName, name); } void mdaDelay::getProgramName(char *name) { strcpy(name, programName); } bool mdaDelay::getProgramNameIndexed (int32_t category, int32_t index, char* name) { if (index == 0) { strcpy(name, programName); return true; } return false; } float mdaDelay::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; case 4: v = fParam4; break; case 5: v = fParam5; break; } return v; } void mdaDelay::getParameterName(int32_t index, char *label) { switch(index) { case 0: strcpy(label, "L Delay"); break; case 1: strcpy(label, "R Delay"); break; case 2: strcpy(label, "Feedback"); break; case 3: strcpy(label, "Fb Tone"); break; case 4: strcpy(label, "FX Mix"); break; case 5: strcpy(label, "Output"); break; } } #include static void int2strng(int32_t value, char *string) { sprintf(string, "%d", value); } void mdaDelay::getParameterDisplay(int32_t index, char *text) { switch(index) { case 0: int2strng((int32_t)(ldel * 1000.0f / getSampleRate()), text); break; case 1: int2strng((int32_t)(100 * rdel / ldel), text); break; case 2: int2strng((int32_t)(99 * fParam2), text); break; case 3: int2strng((int32_t)(200 * fParam3 - 100), text); break; case 4: int2strng((int32_t)(100 * fParam4), text); break; case 5: int2strng((int32_t)(20 * log10(2.0 * fParam5)), text); break; } } void mdaDelay::getParameterLabel(int32_t index, char *label) { switch(index) { case 0: strcpy(label, "ms"); break; case 3: strcpy(label, "Lo <> Hi"); break; case 5: strcpy(label, "dB"); break; default: strcpy(label, "%"); break; } } //-------------------------------------------------------------------------------- // process void mdaDelay::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, ol, or_, w=wet, y=dry, fb=fbk; float lx=lmix, hx=hmix, f=fil, f0=fil0, tmp; int32_t i=ipos, l, r, s=size; l = (i + ldel) % (s + 1); r = (i + rdel) % (s + 1); --in1; --in2; --out1; --out2; while(--sampleFrames >= 0) { a = *++in1; b = *++in2; c = out1[1]; d = out2[1]; ol = *(buffer + l); or_ = *(buffer + r); tmp = w * (a + b) + fb * (ol + or_); f0 = f * (f0 - tmp) + tmp; *(buffer + i) = lx * f0 + hx * tmp; i--; if(i<0) i=s; l--; if(l<0) l=s; r--; if(r<0) r=s; *++out1 = c + y * a + ol; *++out2 = d + y * b + or_; } ipos = i; if(fabs(f0)<1.0e-10) fil0=0.0f; else fil0=f0; } void mdaDelay::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, ol, or_, w=wet, y=dry, fb=fbk; float lx=lmix, hx=hmix, f=fil, f0=fil0, tmp; int32_t i=ipos, l, r, s=size; l = (i + ldel) % (s + 1); r = (i + rdel) % (s + 1); --in1; --in2; --out1; --out2; while(--sampleFrames >= 0) { a = *++in1; b = *++in2; ol = *(buffer + l); //delay outputs or_ = *(buffer + r); tmp = w * (a + b) + fb * (ol + or_); //mix input & feedback f0 = f * (f0 - tmp) + tmp; //low-pass filter *(buffer + i) = lx * f0 + hx * tmp; //delay input i--; if(i<0) i=s; l--; if(l<0) l=s; r--; if(r<0) r=s; *++out1 = y * a + ol; //mix wet & dry *++out2 = y * b + or_; } ipos = i; if(fabs(f0)<1.0e-10) fil0=0.0f; else fil0=f0; //trap denormals }