1 /* 2 * mdaLeslieProcessor.cpp 3 * mda-vst3 4 * 5 * Created by Arne Scheffler on 6/14/08. 6 * 7 * mda VST Plug-ins 8 * 9 * Copyright (c) 2008 Paul Kellett 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: 12 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 14 * 15 */ 16 17 #include "mdaLeslieProcessor.h" 18 #include "mdaLeslieController.h" 19 20 #include <math.h> 21 22 namespace Steinberg { 23 namespace Vst { 24 namespace mda { 25 26 //----------------------------------------------------------------------------- 27 FUID LeslieProcessor::uid (0xFBD3AD80, 0x9E2847E0, 0xB87CDEC3, 0x5C0469B1); 28 29 //----------------------------------------------------------------------------- 30 LeslieProcessor::LeslieProcessor () 31 { 32 setControllerClass (LeslieController::uid); 33 allocParameters (9); 34 } 35 36 //----------------------------------------------------------------------------- 37 LeslieProcessor::~LeslieProcessor () 38 { 39 } 40 41 //----------------------------------------------------------------------------- 42 tresult PLUGIN_API LeslieProcessor::initialize (FUnknown* context) 43 { 44 tresult res = BaseProcessor::initialize (context); 45 if (res == kResultTrue) 46 { 47 addAudioInput (USTRING("Stereo In"), SpeakerArr::kStereo); 48 addAudioOutput (USTRING("Stereo Out"), SpeakerArr::kStereo); 49 50 params[LeslieController::kParam0] = 0.66f; 51 params[LeslieController::kParam7] = 0.50f; 52 params[LeslieController::kParam6] = 0.48f; 53 params[LeslieController::kParam3] = 0.70f; 54 params[LeslieController::kParam4] = 0.60f; 55 params[LeslieController::kParam5] = 0.70f; 56 params[LeslieController::kParam2] = 0.50f; 57 params[LeslieController::kParam1] = 0.50f; 58 params[LeslieController::kParam8] = 0.60f; 59 60 size = 256; hpos = 0; 61 hbuf = new float[size]; 62 fbuf1 = fbuf2 = 0.0f; 63 twopi = 6.2831853f; 64 chp = dchp = clp = dclp = shp = dshp = slp = dslp = 0.0f; 65 66 lspd = 0.0f; hspd = 0.0f; 67 lphi = 0.0f; hphi = 1.6f; 68 69 recalculate (); 70 } 71 return res; 72 } 73 74 //----------------------------------------------------------------------------- 75 tresult PLUGIN_API LeslieProcessor::terminate () 76 { 77 if (hbuf) delete [] hbuf; 78 hbuf = 0; 79 return BaseProcessor::terminate (); 80 } 81 82 //----------------------------------------------------------------------------- 83 tresult PLUGIN_API LeslieProcessor::setActive (TBool state) 84 { 85 if (state) 86 memset (hbuf, 0, size * sizeof (float)); 87 return BaseProcessor::setActive (state); 88 } 89 90 //----------------------------------------------------------------------------- 91 void LeslieProcessor::doProcessing (ProcessData& data) 92 { 93 int32 sampleFrames = data.numSamples; 94 95 float* in1 = data.inputs[0].channelBuffers32[0]; 96 float* in2 = data.inputs[0].channelBuffers32[1]; 97 float* out1 = data.outputs[0].channelBuffers32[0]; 98 float* out2 = data.outputs[0].channelBuffers32[1]; 99 100 float a, c, d, g=gain, h, l; 101 float fo=filo, fb1=fbuf1, fb2=fbuf2; 102 float hl=hlev, hs=hspd, ht, hm=hmom, hp=hphi, hw=hwid, hd=hdep; 103 float ll=llev, ls=lspd, lt, lm=lmom, lp=lphi, lw=lwid; 104 float hint, k0=0.03125f, k1=32.f; //k0 = 1/k1 105 int32 hdd, hdd2, k=0, hps=hpos; 106 107 ht=hset*(1.f-hm); //target speeds 108 lt=lset*(1.f-lm); 109 110 chp = (float)cos(hp); chp *= chp * chp; //set LFO values 111 clp = (float)cos(lp); 112 shp = (float)sin(hp); 113 slp = (float)sin(lp); 114 115 --in1; 116 --in2; 117 --out1; 118 --out2; 119 while (--sampleFrames >= 0) 120 { 121 a = *++in1 + *++in2; //mono input 122 123 if (k) k--; else //linear piecewise approx to LFO waveforms 124 { 125 ls = (lm * ls) + lt; //tend to required speed 126 hs = (hm * hs) + ht; 127 lp += k1 * ls; 128 hp += k1 * hs; 129 130 dchp = (float)cos(hp + k1*hs); 131 dchp = k0 * (dchp * dchp * dchp - chp); //sin^3 level mod 132 dclp = k0 * ((float)cos(lp + k1*ls) - clp); 133 dshp = k0 * ((float)sin(hp + k1*hs) - shp); 134 dslp = k0 * ((float)sin(lp + k1*ls) - slp); 135 136 k= (int32)k1; 137 } 138 139 fb1 = fo * (fb1 - a) + a; //crossover 140 fb2 = fo * (fb2 - fb1) + fb1; 141 h = (g - hl * chp) * (a - fb2); //volume 142 l = (g - ll * clp) * fb2; 143 144 if (hps>0) hps--; else hps=200; //delay input pos 145 hint = hps + hd * (1.0f + chp); //delay output pos 146 hdd = (int)hint; 147 hint = hint - hdd; //linear intrpolation 148 hdd2 = hdd + 1; 149 if (hdd>199) { if (hdd>200) hdd -= 201; hdd2 -= 201; } 150 151 *(hbuf + hps) = h; //delay input 152 a = *(hbuf + hdd); 153 h += a + hint * ( *(hbuf + hdd2) - a); //delay output 154 155 c = l + h; 156 d = l + h; 157 h *= hw * shp; 158 l *= lw * slp; 159 d += l - h; 160 c += h - l; 161 162 *++out1 = c; //output 163 *++out2 = d; 164 165 chp += dchp; 166 clp += dclp; 167 shp += dshp; 168 slp += dslp; 169 } 170 lspd = ls; 171 hspd = hs; 172 hpos = hps; 173 lphi = (float)fmod(lp+(k1 -k)*ls,twopi); 174 hphi = (float)fmod(hp+(k1 -k)*hs,twopi); 175 if (fabs (fb1)>1.0e-10) fbuf1=fb1; else fbuf1=0.0f; //catch denormals 176 if (fabs (fb2)>1.0e-10) fbuf2=fb2; else fbuf2=0.0f; 177 } 178 179 //----------------------------------------------------------------------------- 180 void LeslieProcessor::recalculate () 181 { 182 float ifs = 1.0f / (float)getSampleRate (); 183 float spd = twopi * ifs * 2.0f * params[LeslieController::kParam8]; 184 185 filo = 1.f - (float)pow (10.0f, (float)(params[LeslieController::kParam6] * (2.27f - 0.54f * params[LeslieController::kParam6]) - 1.92f)); 186 187 switch ((int)(params[LeslieController::kParam0]*2.)) 188 { 189 case 0: 190 { 191 lset = 0.00f; hset = 0.00f; 192 lmom = 0.12f; hmom = 0.10f; 193 break; 194 } 195 case 1: 196 { 197 lset = 0.49f; hset = 0.66f; 198 lmom = 0.27f; hmom = 0.18f; 199 break; 200 } 201 case 2: 202 { 203 lset = 5.31f; hset = 6.40f; 204 lmom = 0.14f; hmom = 0.09f; 205 break; 206 } 207 } 208 209 hmom = (float)pow (10.0f, -ifs / hmom); 210 lmom = (float)pow (10.0f, -ifs / lmom); 211 hset *= spd; 212 lset *= spd; 213 214 gain = 0.4f * (float)pow (10.0f, (float)(2.0f * params[LeslieController::kParam7] - 1.0f)); 215 lwid = params[LeslieController::kParam1] * params[LeslieController::kParam1]; 216 llev = gain * 0.9f * params[LeslieController::kParam2] * params[LeslieController::kParam2]; 217 hwid = params[LeslieController::kParam3] * params[LeslieController::kParam3]; 218 hdep = params[LeslieController::kParam4] * params[LeslieController::kParam4] * getSampleRate () / 760.0f; 219 hlev = gain * 0.9f * params[LeslieController::kParam5] * params[LeslieController::kParam5]; 220 } 221 222 }}} // namespaces 223 224