remove processReplacing
[software/lv2-mdametapiano.git] / src / mdaPiano.cpp
1 /* ==================================================
2 * LV2 port of the famous mda Piano VSTi
3 * ==================================================
4 *
5 * Port
6 * Author: Ricardo Wurmus (rekado)
7 * Based on: mda-vst-src-2010-02-14.zip
8 *
9 * mda Piano v1.0
10 * Copyright(c)1999-2000 Paul Kellett (maxim digital audio)
11 * Based on VST2 SDK (c)1996-1999 Steinberg Soft und Hardware GmbH, All Rights Reserved
12 *
13 * ==================================================
14 */
15
16 #include "mdaPianoCommon.h"
17 #include "mdaPiano.h"
18
19 #include <stdio.h>
20 #include <math.h>
21
22 #define STRING_BUF 2048
23 static const char* sample_file = "samples.raw";
24
25
26 mdaPiano::mdaPiano(double rate)
27 : LV2::Synth<mdaPianoVoice, mdaPiano>(p_n_ports, p_midi) {
28
29 cmax = 0x7F; //just in case...
30
31 load_samples(&waves);
32 load_kgrp(kgrp);
33
34 for(uint32_t i=0; i<NVOICES; ++i) {
35 voices[i] = new mdaPianoVoice(rate, waves, kgrp);
36 add_voices(voices[i]);
37 }
38
39 notes[0] = EVENTS_DONE;
40 cpos = sustain = activevoices = 0;
41 comb = new float[256];
42
43 update();
44 suspend();
45 }
46
47
48 void mdaPiano::update() //parameter change
49 {
50 float * param = programs[curProgram].param;
51 size = (uint32_t)(12.0f * param[2] - 6.0f);
52 sizevel = 0.12f * param[3];
53 muffvel = param[5] * param[5] * 5.0f;
54
55 velsens = 1.0f + param[6] + param[6];
56 if(param[6] < 0.25f) velsens -= 0.75f - 3.0f * param[6];
57
58 fine = param[9] - 0.5f;
59 random = 0.077f * param[10] * param[10];
60 stretch = 0.000434f * (param[11] - 0.5f);
61
62 cdep = param[7] * param[7];
63 trim = 1.50f - 0.79f * cdep;
64 width = 0.04f * param[7]; if(width > 0.03f) width = 0.03f;
65
66 poly = 8 + (uint32_t)(24.9f * param[8]);
67 }
68
69
70 void mdaPiano::resume()
71 {
72 Fs = getSampleRate();
73 iFs = 1.0f / Fs;
74 if(Fs > 64000.0f) cmax = 0xFF; else cmax = 0x7F;
75 memset(comb, 0, sizeof(float) * 256);
76 }
77
78
79 void mdaPiano::setParameter(uint32_t index, float value)
80 {
81 programs[curProgram].param[index] = value;
82 update();
83 }
84
85
86 void mdaPiano::process(float **inputs, float **outputs, uint32_t sampleFrames)
87 {
88 float* out0 = outputs[0];
89 float* out1 = outputs[1];
90 uint32_t event=0, frame=0, frames, v;
91 float x, l, r;
92 uint32_t i;
93
94 while(frame<sampleFrames)
95 {
96 frames = notes[event++];
97 if(frames>sampleFrames) frames = sampleFrames;
98 frames -= frame;
99 frame += frames;
100
101 while(--frames>=0)
102 {
103 VOICE *V = voice;
104 l = r = 0.0f;
105
106 for(v=0; v<activevoices; v++)
107 {
108 V->frac += V->delta; //integer-based linear interpolation
109 V->pos += V->frac >> 16;
110 V->frac &= 0xFFFF;
111 if(V->pos > V->end) V->pos -= V->loop;
112
113 i = waves[V->pos];
114 i = (i << 7) + (V->frac >> 9) * (waves[V->pos + 1] - i) + 0x40400000;
115 x = V->env * (*(float *)&i - 3.0f); //fast int->float
116
117 /////////////////////
118 //TODO: This was used in processReplacing instead of the above
119 /*
120 //i = (i << 7) + (V->frac >> 9) * (waves[V->pos + 1] - i) + 0x40400000; //not working on intel mac !?!
121 i = waves[V->pos] + ((V->frac * (waves[V->pos + 1] - waves[V->pos])) >> 16);
122 x = V->env * (float)i / 32768.0f;
123 //x = V->env * (*(float *)&i - 3.0f); //fast int->float
124 */
125 /////////////////////
126
127 V->env = V->env * V->dec; //envelope
128 V->f0 += V->ff * (x + V->f1 - V->f0); //muffle filter
129 V->f1 = x;
130
131 l += V->outl * V->f0;
132 r += V->outr * V->f0;
133
134 //TODO: this was used in processReplacing
135 /////////////////////
136 /*
137 if(!(l > -2.0f) || !(l < 2.0f))
138 {
139 printf("what is this shit? %d, %f, %f\n", i, x, V->f0);
140 l = 0.0f;
141 }
142 if(!(r > -2.0f) || !(r < 2.0f))
143 {
144 r = 0.0f;
145 }
146 */
147 /////////////////////
148
149 V++;
150 }
151 comb[cpos] = l + r;
152 ++cpos &= cmax;
153 x = cdep * comb[cpos]; //stereo simulator
154
155 // TODO: processReplacing simply assigned instead of adding
156 *out0++ += l + x;
157 *out1++ += r - x;
158 }
159
160 if(frame<sampleFrames)
161 {
162 uint32_t note = notes[event++];
163 uint32_t vel = notes[event++];
164 noteOn(note, vel);
165 }
166 }
167 for(v=0; v<activevoices; v++) if(voice[v].env < SILENCE) voice[v] = voice[--activevoices];
168 notes[0] = EVENTS_DONE; //mark events buffer as done
169 }
170
171
172 uint32_t mdaPiano::processEvents(VstEvents* ev)
173 {
174 uint32_t npos=0;
175
176 for (uint32_t i=0; i<ev->numEvents; i++)
177 {
178 if((ev->events[i])->type != kVstMidiType) continue;
179 VstMidiEvent* event = (VstMidiEvent*)ev->events[i];
180 char* midiData = event->midiData;
181
182 switch(midiData[0] & 0xf0) //status byte (all channels)
183 {
184 case 0x80: //note off
185 notes[npos++] = event->deltaFrames; //delta
186 notes[npos++] = midiData[1] & 0x7F; //note
187 notes[npos++] = 0; //vel
188 break;
189
190 case 0x90: //note on
191 notes[npos++] = event->deltaFrames; //delta
192 notes[npos++] = midiData[1] & 0x7F; //note
193 notes[npos++] = midiData[2] & 0x7F; //vel
194 break;
195
196 case 0xB0: //controller
197 switch(midiData[1])
198 {
199 case 0x01: //mod wheel
200 case 0x43: //soft pedal
201 muff = 0.01f * (float)((127 - midiData[2]) * (127 - midiData[2]));
202 break;
203
204 case 0x07: //volume
205 volume = 0.00002f * (float)(midiData[2] * midiData[2]);
206 break;
207
208 case 0x40: //sustain pedal
209 case 0x42: //sustenuto pedal
210 sustain = midiData[2] & 0x40;
211 if(sustain==0)
212 {
213 notes[npos++] = event->deltaFrames;
214 notes[npos++] = SUSTAIN; //end all sustained notes
215 notes[npos++] = 0;
216 }
217 break;
218
219 //all sound off
220 case 0x78:
221 //all notes off
222 case 0x7b:
223 default:
224 for(short v=0; v<NVOICES; v++) {
225 voices[v]->reset();
226 }
227 break;
228 }
229 break;
230
231 default: break;
232 }
233
234 if(npos>EVENTBUFFER) npos -= 3; //discard events if buffer full!!
235 event++; //?
236 }
237 notes[npos] = EVENTS_DONE;
238 return 1;
239 }
240
241
242 // TODO: load this from a file
243 void mdaPiano::load_kgrp(KGRP *kgrp)
244 {
245 //Waveform data and keymapping is hard-wired in *this* version
246 kgrp[ 0].root = 36; kgrp[ 0].high = 37; kgrp[ 0].pos = 0; kgrp[ 0].end = 36275; kgrp[ 0].loop = 14774;
247 kgrp[ 1].root = 40; kgrp[ 1].high = 41; kgrp[ 1].pos = 36278; kgrp[ 1].end = 83135; kgrp[ 1].loop = 16268;
248 kgrp[ 2].root = 43; kgrp[ 2].high = 45; kgrp[ 2].pos = 83137; kgrp[ 2].end = 146756; kgrp[ 2].loop = 33541;
249 kgrp[ 3].root = 48; kgrp[ 3].high = 49; kgrp[ 3].pos = 146758; kgrp[ 3].end = 204997; kgrp[ 3].loop = 21156;
250 kgrp[ 4].root = 52; kgrp[ 4].high = 53; kgrp[ 4].pos = 204999; kgrp[ 4].end = 244908; kgrp[ 4].loop = 17191;
251 kgrp[ 5].root = 55; kgrp[ 5].high = 57; kgrp[ 5].pos = 244910; kgrp[ 5].end = 290978; kgrp[ 5].loop = 23286;
252 kgrp[ 6].root = 60; kgrp[ 6].high = 61; kgrp[ 6].pos = 290980; kgrp[ 6].end = 342948; kgrp[ 6].loop = 18002;
253 kgrp[ 7].root = 64; kgrp[ 7].high = 65; kgrp[ 7].pos = 342950; kgrp[ 7].end = 391750; kgrp[ 7].loop = 19746;
254 kgrp[ 8].root = 67; kgrp[ 8].high = 69; kgrp[ 8].pos = 391752; kgrp[ 8].end = 436915; kgrp[ 8].loop = 22253;
255 kgrp[ 9].root = 72; kgrp[ 9].high = 73; kgrp[ 9].pos = 436917; kgrp[ 9].end = 468807; kgrp[ 9].loop = 8852;
256 kgrp[10].root = 76; kgrp[10].high = 77; kgrp[10].pos = 468809; kgrp[10].end = 492772; kgrp[10].loop = 9693;
257 kgrp[11].root = 79; kgrp[11].high = 81; kgrp[11].pos = 492774; kgrp[11].end = 532293; kgrp[11].loop = 10596;
258 kgrp[12].root = 84; kgrp[12].high = 85; kgrp[12].pos = 532295; kgrp[12].end = 560192; kgrp[12].loop = 6011;
259 kgrp[13].root = 88; kgrp[13].high = 89; kgrp[13].pos = 560194; kgrp[13].end = 574121; kgrp[13].loop = 3414;
260 kgrp[14].root = 93; kgrp[14].high = 999; kgrp[14].pos = 574123; kgrp[14].end = 586343; kgrp[14].loop = 2399;
261 }
262
263
264 void mdaPiano::load_samples(short **buffer)
265 {
266 FILE *f;
267 long num, size;
268 char filepath[STRING_BUF];
269
270 strncpy(filepath, bundle_path(), STRING_BUF);
271 strncat(filepath,
272 sample_file,
273 STRING_BUF - strlen(filepath));
274 f = fopen(filepath, "rb");
275 if (f == NULL) {
276 fputs("File error", stderr);
277 exit(1);
278 }
279
280 // obtain file size
281 fseek(f, 0, SEEK_END);
282 size = ftell(f);
283 rewind(f);
284
285 // allocate memory to contain the whole file
286 *buffer = (short*) malloc (sizeof(short)*size);
287 if (*buffer == NULL) {
288 fputs("Memory error", stderr);
289 exit(2);
290 }
291
292 // copy the file into the buffer
293 num = fread(*buffer, 1, size, f);
294 if (num != size) {
295 fputs ("Reading error", stderr);
296 exit (3);
297 }
298 fclose (f);
299 return;
300 }