source: buchla-68k/ram/initi.c@ a3eb131

Last change on this file since a3eb131 was fa50076, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Fixed initi.c.
  • Property mode set to 100644
File size: 11.9 KB
Line 
1/*
2 =============================================================================
3 initi.c -- MIDAS-VII - instrument editor support functions
4 Version 2 -- 1989-12-19 -- D.N. Lynx Crowe
5 =============================================================================
6*/
7
8#define DEBUGPS 0 /* define non-zero to debug pntsel() */
9
10#include "ram.h"
11
12#include "dfltins.h" /* short dfltins[]; default instrument */
13#include "ptoftab.h" /* int16_t ptoftab[]; pitch to frequency table */
14
15int16_t finival[NFINST] = { /* initial function values */
16
17 FPUVAL(500), /* 0: Freq 1 */
18 FPUVAL(500), /* 1: Freq 2 */
19 FPUVAL(500), /* 2: Freq 3 */
20 FPUVAL(500), /* 3: Freq 4 */
21 FPUVAL(500), /* 4: Filter / Resonance */
22 FPUVAL(500), /* 5: Location */
23
24 FPUVAL(0), /* 6: Index 1 */
25 FPUVAL(0), /* 7: Index 2 */
26 FPUVAL(0), /* 8: Index 3 */
27 FPUVAL(0), /* 9: Index 4 */
28 FPUVAL(0), /* 10: Index 5 */
29 FPUVAL(0), /* 11: Index 6 */
30
31 FPUVAL(0) /* 12: Level */
32};
33
34uint16_t expbit[16] = { /* FPU time exponent bit expansion table */
35
36 0x0001, /* 0 */
37 0x0002, /* 1 */
38 0x0004, /* 2 */
39 0x0008, /* 3 */
40 0x0010, /* 4 */
41 0x0020, /* 5 */
42 0x0040, /* 6 */
43 0x0080, /* 7 */
44 0x0100, /* 8 */
45 0x0200, /* 9 */
46 0x0400, /* 10 */
47 0x0800, /* 11 */
48 0x1000, /* 12 */
49 0x2000, /* 13 */
50 0x4000, /* 14 */
51 0x8000 /* 15 */
52};
53
54/*
55 =============================================================================
56 segtime() -- determine time to a point using a new segment time
57 =============================================================================
58*/
59
60uint16_t segtime(int16_t pn, uint16_t ptime)
61{
62 register struct instpnt *pp;
63 register int16_t i;
64 register uint16_t tacc;
65
66 pp = &vbufs[curvce].idhpnt[vbufs[curvce].idhfnc[curfunc].idfpt1];
67 tacc = 0;
68
69 for (i = 0; i < pn; i++)
70 tacc += fromfpu(pp++->iptim);
71
72 tacc += fromfpu(ptime);
73
74 return(tacc);
75}
76
77/*
78 =============================================================================
79 setseg() -- set the time to a segment
80 =============================================================================
81*/
82
83void setseg(int16_t pn, uint16_t ptime)
84{
85 register int16_t i;
86 register uint16_t tacc;
87 register struct instpnt *pp;
88
89 pp = &vbufs[curvce].idhpnt[vbufs[curvce].idhfnc[curfunc].idfpt1];
90 tacc = 0;
91
92 for (i = 0; i < pn; i++)
93 tacc += fromfpu(pp++->iptim);
94
95 pp->iptim = tofpu(ptime - tacc);
96}
97
98/*
99 =============================================================================
100 timeto() -- find the time at a point in a function
101 =============================================================================
102*/
103
104uint16_t timeto(int16_t fn, int16_t pj)
105{
106 register struct instdef *ip;
107 register struct instpnt *pt;
108 register int16_t pm, pn;
109 uint16_t tf;
110
111 ip = &vbufs[curvce];
112 pn = ip->idhfnc[fn].idfpt1;
113 pt = &ip->idhpnt[pn];
114 pm = pn + pj;
115 tf = 0;
116
117 while (pn LE pm) {
118
119 tf += fromfpu(pt->iptim);
120 ++pt;
121 ++pn;
122 }
123
124 return(tf);
125}
126
127/*
128 =============================================================================
129 pntsel() -- setup editing limits for subj in the current function
130 =============================================================================
131*/
132
133void pntsel(void)
134{
135 register struct idfnhdr *fp;
136
137 fp = &vbufs[curvce].idhfnc[curfunc];
138
139 curpnt = fp->idfpt1 + subj;
140 pntptr = &vbufs[curvce].idhpnt[curpnt];
141
142 npts = fp->idfpif;
143
144 if (npts EQ 1) { /* detemine editing case */
145
146 pecase = 0; /* single point */
147 temin = 1;
148 temax = 32767;
149
150 } else if (subj EQ (npts - 1)) {
151
152 pecase = 1; /* last point */
153 temin = timeto(curfunc, subj - 1);
154 temax = 32767;
155
156 } else {
157
158 pecase = 2; /* interior point */
159 temin = timeto(curfunc, subj - 1);
160 temax = timeto(curfunc, subj + 1);
161 }
162
163#if DEBUGPS
164 printf("pntsel(): curpnt=%d, subj=%d, fp=0x%08lx, pntptr=0x%08lx\r\n",
165 curpnt, subj, fp, pntptr);
166 printf("pntsel(): npts=%d, pecase=%d, temin=%d, temax=%d\r\n",
167 npts, pecase, temin, temax);
168#endif
169}
170
171/*
172 =============================================================================
173 vtoy() -- convert a value to a y coordinate for display
174 =============================================================================
175*/
176
177int16_t vtoy(int16_t val, int16_t window)
178{
179 register int16_t yval;
180
181 if (val GT 1000)
182 val = 1000;
183
184 yval = 56 + (((1000 - val) * 14) / 100);
185
186 if (window < 12)
187 return((int16_t)(idbox[window][1] + (((yval - 56) * 100L) / 540L)));
188 else
189 return(yval);
190}
191
192/*
193 =============================================================================
194 ttox() -- convert a time to an x coordinate for display
195 =============================================================================
196*/
197
198int16_t ttox(uint16_t time, int16_t window)
199{
200 register int16_t xval;
201
202 if (time < 128) /* 0..127 */
203 xval = 8 + (int16_t)(((time * 1000L) / 2309L));
204 else if (time < 256) /* 128..255 */
205 xval = 64 + (int16_t)((((time - 128) * 1000L) / 2309L));
206 else if (time < 512) /* 256..511 */
207 xval = 120 + (int16_t)((((time - 256) * 1000L) / 4636L));
208 else if (time < 1024) /* 512..1023 */
209 xval = 176 + (int16_t)((((time - 512) * 1000L) / 9290L));
210 else if (time < 2048) /* 1024..2047 */
211 xval = 232 + (int16_t)((((time - 1024) * 1000L) / 18600L));
212 else if (time < 4096) /* 2048..4095 */
213 xval = 288 + (int16_t)((((time - 2048) * 1000L) / 37218L));
214 else if (time < 8192) /* 4096..8191 */
215 xval = 344 + (int16_t)((((time - 4096) * 1000L)/ 74454L));
216 else if (time < 16384) /* 8192..16383 */
217 xval = 400 + (int16_t)((((time - 8192) * 1000L) / 148927L));
218 else if (time < (uint16_t)32768) /* 16384..32767 */
219 xval = 456 + (int16_t)((((time - 16384) * 1000L) / 309113L));
220 else
221 xval = 509;
222
223 if (xval > 509)
224 xval = 509;
225
226 if (window < 12)
227 return((int16_t)(idbox[window][0] + (((xval - 8) * 100L) / 599L)));
228 else
229 return(xval);
230}
231
232/*
233 =============================================================================
234 selpnt() -- select a point for editing
235 =============================================================================
236*/
237
238int16_t selpnt(void)
239{
240 register struct idfnhdr *fp;
241
242 register int16_t i, xv, np;
243
244 int16_t lo_x, lo_x_pt, hi_x, hi_x_pt;
245
246 fp = &vbufs[curvce].idhfnc[curfunc];
247 np = fp->idfpif;
248 lo_x_pt = 0;
249 lo_x = ttox(timeto(curfunc, lo_x_pt), 12);
250 hi_x_pt = np - 1;
251 hi_x = ttox(timeto(curfunc, hi_x_pt), 12);
252
253 for (i = 0; i < np; i++) {
254
255 xv = ttox(timeto(curfunc, i), 12);
256
257 if (xv LE cxval) /* largest x LE cxval */
258 if (xv GE lo_x) {
259
260 lo_x = xv;
261 lo_x_pt = i;
262 }
263
264 if (xv GE cxval) /* smallest x GE cxval*/
265 if (xv LT hi_x) {
266
267 hi_x = xv;
268 hi_x_pt = i;
269 }
270 }
271
272 if (lo_x EQ hi_x)
273 return(lo_x_pt);
274
275 if ((cxval - lo_x) LT (hi_x - cxval))
276 return(lo_x_pt);
277 else
278 return(hi_x_pt);
279}
280
281/*
282 =============================================================================
283 setinst() -- setup for editing a new instrument
284 =============================================================================
285*/
286
287void setinst(void)
288{
289 register struct instdef *ip;
290 register struct idfnhdr *fp;
291
292 curfunc = 12; /* current function = 12 = level */
293 subj = 0; /* current edited point = 0 (first point) */
294 pntsv = 0; /* point selection state = unselected */
295 pecase = 0; /* point selection case = 0 (first point) */
296
297 ip = &vbufs[curvce]; /* instrument definition pointer */
298 fp = &ip->idhfnc[curfunc]; /* function pointer */
299
300 curpnt = subj + fp->idfpt1; /* current point in function */
301 pntptr = &ip->idhpnt[curpnt]; /* current point pointer */
302
303 newws(); /* setup waveshape variables */
304}
305
306/*
307 =============================================================================
308 newinst() -- select a new instrument
309 =============================================================================
310*/
311
312void newinst(int16_t inst)
313{
314 curinst = inst;
315 s_inst[curvce] = inst;
316 setinst();
317}
318
319/*
320 =============================================================================
321 newvce() -- select a new voice
322 =============================================================================
323*/
324
325void newvce(int16_t voice)
326{
327 curvce = voice;
328 curinst = s_inst[curvce];
329 setinst();
330}
331
332/*
333 =============================================================================
334 setivce() -- set instrument definition for a voice
335 =============================================================================
336*/
337
338void setivce(int16_t voice)
339{
340 register int16_t j, k, oldi;
341 register struct instdef *ip;
342
343 ip = &vbufs[voice];
344
345 oldi = setipl(FPU_DI); /* disable FPU interrupts */
346
347/* +++++++++++++++++++++++ FPU interrupts disabled ++++++++++++++++++++++++++ */
348
349 for (j = 0; j < NFINST; j++) { /* set funcndx[] entries */
350
351 k = (voice << 4) + fnoff[j];
352 funcndx[k][0] = &ip->idhfnc[j];
353 funcndx[k][1] = ip->idhpnt;
354 }
355
356 /* set waveshapes */
357
358 memcpyw((io_fpu + FPU_OWST + (voice << 9) + 0x0100 + 1),
359 ip->idhwvaf, NUMWPNT);
360
361 memcpyw((io_fpu + FPU_OWST + (voice << 9) + 1),
362 ip->idhwvbf, NUMWPNT);
363
364 setipl(oldi); /* restore interrupts */
365
366/* ++++++++++++++++++++++++++ Interrupts restored +++++++++++++++++++++++++++ */
367
368 instmod[voice] = FALSE; /* instrument matches library */
369}
370
371/*
372 =============================================================================
373 modinst() -- handle instrument modifications
374 =============================================================================
375*/
376
377void modinst(void)
378{
379 int16_t f, i, grp, oldi;
380
381 if (NOT instmod[curvce]) {
382
383 instmod[curvce] = TRUE;
384 dswin(19);
385 }
386
387 if (NOT editsw) {
388
389 if ((grp = vce2grp[curvce]) > 0) {
390
391 oldi = setipl(FPU_DI); /* +++++ disable FPU interrupts */
392
393 for (i = 0; i < 12; i++) {
394
395 if (vce2grp[i] EQ grp) {
396
397 memcpyw(&vbufs[i], &vbufs[curvce],
398 sizeof (struct instdef) / 2);
399
400 for (f = 0; f < 12; f++)
401 vbufs[i].idhfnc[f].idftmd
402 &= ~I_ACTIVE;
403
404 s_inst[i] = curinst;
405 clrvce(i);
406 setivce(i);
407 dosync(i);
408 execkey(0, 0, i, 1);
409 vce2trg[i] = -1;
410 }
411 }
412
413 setipl(oldi); /* +++++ enable FPU interrupts */
414 }
415 }
416}
417
418/*
419 =============================================================================
420 initi() -- initialize an instrument definition
421 =============================================================================
422*/
423
424void initi(struct instdef *ip)
425{
426 int16_t i, rb;
427 uint16_t mintfpu;
428
429 memsetw(ip, 0, sizeof (struct instdef) / 2);
430
431 memcpy(ip->idhname, " ", MAXIDLN+1);
432 memcpy(ip->idhcom1, " ", MAXIDLN+1);
433 memcpy(ip->idhcom2, " ", MAXIDLN+1);
434 memcpy(ip->idhcom3, " ", MAXIDLN+1);
435
436 ip->idhplft = NIPNTS - NFINST;
437 ip->idhcfg = (int8_t)((initcfg >> 8) & 0x00FF);
438 mintfpu = tofpu(1);
439
440 for (i = 0; i < NFINST; i++) { /* for each function ... */
441
442 /* initialize the function header */
443
444 rb = ((i < 4) AND (i NE 0)) ? 0 : I_NRATIO;
445 ip->idhfnc[i].idfpif = 1;
446 ip->idhfnc[i].idfpt1 = (int8_t)i;
447 ip->idhfnc[i].idftmd = (int8_t)((I_TM_KEY | 0x0010) | rb);
448
449 /* initialize the first point in the function */
450
451 ip->idhpnt[i].iptim = mintfpu;
452 ip->idhpnt[i].ipval = finival[i];
453 }
454
455 for (i = 0; i < NUMWPNT; i++) {
456
457 ip->idhwvaf[i] = (ip->idhwvao[i] = (int16_t)0x8000 ^ ((i + 1) << 8));
458 ip->idhwvbf[i] = (ip->idhwvbo[i] = (int16_t)0x8000 ^ ((i + 1) << 8));
459 }
460}
461
462/*
463 =============================================================================
464 initil() -- initialize instrument library
465 =============================================================================
466*/
467
468void initil(void)
469{
470 register int16_t i;
471
472 setipl(FPU_DI); /* disable FPU interrupts */
473
474/* +++++++++++++++++++++++ FPU interrupts disabled ++++++++++++++++++++++++++ */
475
476 fpuclr(); /* clear the FPU */
477
478 memcpyw(&idefs[0], dfltins, sizeof (struct instdef) / 2);
479
480 for (i = 1; i < NINST; i++) /* initialize each instrument */
481 initi(&idefs[i]);
482
483 memset(funcndx, 0, sizeof funcndx);
484
485 for (i = 0; i < 12; i++) { /* initialize voices */
486
487 memcpyw(&vbufs[i], &idefs[0], sizeof (struct instdef) / 2);
488 setivce(i);
489 }
490
491 setipl(FPU_EI); /* enable FPU interrupts */
492
493/* ++++++++++++++++++++++++++ Interrupts enabled ++++++++++++++++++++++++++++ */
494
495 newvce(0); /* setup editing for instrument 0, voice 0 */
496 newinst(0);
497}
498
499
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