source: buchla-68k/orig/RAM/SCTRAK.C@ 6099cac

Last change on this file since 6099cac was 3ae31e9, checked in by Thomas Lopatic <thomas@…>, 8 years ago

Imported original source code.
  • Property mode set to 100755
File size: 9.7 KB
Line 
1/*
2 =============================================================================
3 sctrak.c -- advance the score to a given frame
4 Version 28 -- 1988-09-23 -- D.N. Lynx Crowe
5 =============================================================================
6*/
7
8#undef DEBUGGER /* define to enable debug trace */
9
10#undef DEBUG_TR /* define for sc_trak() debug */
11
12#undef CHECKPTR /* define to check pointers */
13
14#include "debug.h"
15
16#include "hwdefs.h"
17#include "stddefs.h"
18#include "score.h"
19#include "scfns.h"
20#include "memory.h"
21#include "slice.h"
22
23#ifdef DEBUG_TR
24extern short debugsw;
25#endif
26
27extern short ancmsw;
28extern short dubsw;
29extern short ndisp;
30extern short recsw;
31extern short sbase;
32extern short sd;
33extern short se;
34extern short soffset;
35
36extern short grpmode[];
37extern short grpstat[];
38
39extern short varmode[][16];
40
41extern struct gdsel *gdfsep;
42
43extern struct gdsel *gdstbc[];
44extern struct gdsel *gdstbn[];
45extern struct gdsel *gdstbp[];
46
47/*
48
49*/
50
51/*
52 =============================================================================
53 sc_trak(tval) -- position score display such that t_ctr EQ 'tval'
54 Assumes that the pointers are correct.
55 =============================================================================
56*/
57
58int
59sc_trak(tval)
60register long tval;
61{
62 register struct s_entry *rpb, *rpc, *rpf;
63 register long rtb, rtc, rtf;
64 register short mod48 = 48;
65 struct gdsel *gdsp;
66
67 DB_ENTR("sc_trak");
68
69 if (ndisp NE 2) {
70
71 DB_EXIT("sc_trak - ndisp NE 2");
72 return(FAILURE);
73 }
74
75#ifdef CHECKPTR
76 Pcheck(p_fwd, "p_fwd - sc_trak - entry");
77 Pcheck(p_ctr, "p_ctr - sc_trak - entry");
78 Pcheck(p_bak, "p_bak - sc_trak - entry");
79#endif
80
81 if ((p_fwd EQ E_NULL) OR (p_ctr EQ E_NULL) OR (p_bak EQ E_NULL)) {
82
83 DB_EXIT("sc_trak - NULL ptr");
84 return(FAILURE);
85 }
86/*
87
88*/
89 if (v_regs[5] & 0x0180) /* setup for VSDD bank 0 */
90 vbank(0);
91
92 rpf = p_fwd; /* forward event pointer */
93 rtf = t_fwd; /* forward event time */
94
95 rpc = p_ctr; /* current event pointer */
96 rtc = t_ctr; /* current event time */
97
98 rpb = p_bak; /* backward event pointer */
99 rtb = t_bak; /* backward event time */
100
101#ifdef DEBUG_TR
102 if (debugsw) {
103
104 printf("\n## sc_trak(%10ld) ENTRY - fc_val=%10ld sd = %s sbase=%d soffset=%d\n",
105 tval, fc_val, sd ? "BAK" : "FWD", sbase, soffset);
106
107 printf(" p_bak: %08lX p_ctr: %08lX p_fwd: %08lX\n",
108 p_bak, p_ctr, p_fwd);
109
110 printf(" t_bak: %10ld t_ctr: %10ld t_fwd: %10ld\n",
111 t_bak, t_ctr, t_fwd);
112
113 printf(" T.bak: %10ld T.ctr: %10ld T.fwd: %10ld\n",
114 p_bak->e_time, p_ctr->e_time, p_fwd->e_time);
115 }
116#endif
117
118/*
119
120*/
121 DB_CMNT("sc_trak - update loop");
122
123 if (sd EQ D_FWD) { /* scroll forward */
124
125 DB_CMNT("sc_trak - forward");
126
127 while (rtc++ LT tval) { /* advance to tval */
128
129 sreset(); /* reset highlighting */
130
131 ++rtb; /* update target time at p_bak */
132 ++rtf; /* update target time at p_fwd */
133
134 if (rpb->e_type NE EV_FINI) { /* up to end of score */
135
136 while (rpb->e_time EQ rtb) { /* check event time */
137
138 se_disp(rpb, D_FWD, gdstbp, 0); /* display event */
139 rpb = rpb->e_fwd; /* point at next event */
140
141 if (rpb->e_type EQ EV_FINI) /* stop at end of score */
142 break;
143 }
144 }
145
146 if (0 EQ (rtb % mod48)) { /* handle beat markers */
147
148 if ((struct gdsel *)NULL NE (gdsp = gdfsep)) {
149
150 gdfsep = gdsp->next;
151
152 gdsp->next = gdstbp[12];
153 gdsp->note = 0x1111;
154 gdsp->code = 1;
155
156 gdstbp[12] = gdsp;
157 }
158 }
159/*
160
161*/
162 if (rpc->e_type NE EV_FINI) { /* up to end of score */
163
164 while (rpc->e_time EQ rtc) { /* check event time */
165
166 se_disp(rpc, D_FWD, gdstbc, 1); /* display event */
167 rpc = rpc->e_fwd; /* point at next event */
168
169 if (rpc->e_type EQ EV_FINI) /* stop at end of score */
170 break;
171 }
172 }
173
174 if (rpf->e_type NE EV_FINI) { /* up to end of score */
175
176 while (rpf->e_time EQ rtf) { /* check event time */
177
178 se_disp(rpf, D_FWD, gdstbn, 0); /* display event */
179 rpf = rpf->e_fwd; /* next event pointer */
180
181 if (rpf->e_type EQ EV_FINI) /* stop at end of score */
182 break;
183 }
184 }
185
186 if (0 EQ (rtf % mod48)) { /* handle beat markers */
187
188 if ((struct gdsel *)NULL NE (gdsp = gdfsep)) {
189
190 gdfsep = gdsp->next;
191
192 gdsp->next = gdstbn[12];
193 gdsp->note = 0x1111;
194 gdsp->code = 1;
195
196 gdstbn[12] = gdsp;
197 }
198 }
199
200 sc_adv(); /* scroll the display */
201 }
202
203/*
204
205*/
206 } else { /* scroll backward */
207
208 DB_CMNT("sc_trak - backward");
209
210 while (rtc-- GT tval) { /* advance to tval */
211
212 sreset(); /* reset highlighting */
213
214 --rtb; /* update target time at p_bak */
215 --rtf; /* update target time at p_fwd */
216
217 if (rpb->e_type NE EV_SCORE) { /* up to start of score */
218
219 while (rpb->e_time EQ rtb) { /* check event time */
220
221 se_disp(rpb, D_BAK, gdstbp, 0);
222 rpb = rpb->e_bak; /* point at next event */
223
224 if (rpb->e_type EQ EV_SCORE) /* stop at end of score */
225 break;
226 }
227 }
228
229 if (0 EQ (rtb % mod48)) { /* handle beat markers */
230
231 if ((struct gdsel *)NULL NE (gdsp = gdfsep)) {
232
233 gdfsep = gdsp->next;
234
235 gdsp->next = gdstbp[12];
236 gdsp->note = 0x1111;
237 gdsp->code = 1;
238
239 gdstbp[12] = gdsp;
240 }
241 }
242/*
243
244*/
245 if (rpc->e_type NE EV_SCORE) { /* up to start of score */
246
247 while (rpc->e_time EQ rtc) { /* check event time */
248
249 se_disp(rpc, D_BAK, gdstbc, 1); /* display event */
250 rpc = rpc->e_bak; /* point at next event */
251
252 if (rpc->e_type EQ EV_SCORE) /* stop at end of score */
253 break;
254 }
255 }
256
257 if (rpf->e_type NE EV_SCORE) { /* up to end of score */
258
259 while (rpf->e_time EQ rtf) { /* check event time */
260
261 se_disp(rpf, D_BAK, gdstbn, 0); /* display event */
262 rpf = rpf->e_bak; /* next event pointer */
263
264 if (rpf->e_type EQ EV_SCORE) /* stop at end of score */
265 break;
266 }
267 }
268
269 if (0 EQ (rtf % mod48)) { /* handle beat markers */
270
271 if ((struct gdsel *)NULL NE (gdsp = gdfsep)) {
272
273 gdfsep = gdsp->next;
274
275 gdsp->next = gdstbn[12];
276 gdsp->note = 0x1111;
277 gdsp->code = 1;
278
279 gdstbn[12] = gdsp;
280 }
281 }
282
283 sc_adv(); /* scroll the display */
284 }
285 }
286/*
287
288*/
289 p_fwd = rpf; /* update p_fwd */
290 t_fwd = tval + TO_FWD; /* update t_fwd */
291
292 p_ctr = rpc; /* update p_ctr */
293 t_ctr = tval; /* update t_ctr */
294
295 p_bak = rpb; /* update p_bak */
296 t_bak = tval - TO_BAK; /* update t_bak */
297
298 DB_CMNT("sc_trak - dslocn");
299 dslocn(); /* display current location */
300
301#ifdef DEBUG_TR
302 if (debugsw) {
303
304 printf("\n## sc_trak(%10ld) EXIT - fc_val=%10ld sbase=%d soffset=%d\n",
305 tval, fc_val, sbase, soffset);
306
307 printf(" p_bak: %08lX, p_ctr: %08lX, p_fwd: %08lX\n",
308 p_bak, p_ctr, p_fwd);
309
310 printf(" t_bak: %10ld, t_ctr: %10ld, t_fwd: %10ld\n",
311 t_bak, t_ctr, t_fwd);
312
313 printf(" T.bak: %10ld T.ctr: %10ld T.fwd: %10ld\n",
314 p_bak->e_time, p_ctr->e_time, p_fwd->e_time);
315 }
316#endif
317
318 DB_EXIT("sc_trak");
319 return(SUCCESS);
320}
321
322/*
323
324*/
325
326/*
327 =============================================================================
328 sc_trek(tval) -- follow score chain such that t_cur EQ 'tval'
329 =============================================================================
330*/
331
332int
333sc_trek(tval)
334register long tval;
335{
336 register struct s_entry *rp, *ep;
337 register long tc, rt;
338 register short et, grp;
339
340 DB_ENTR("sc_trek");
341
342#ifdef CHECKPTR
343 Pcheck(p_cur, "p_cur - sc_trek - entry");
344#endif
345
346 if (p_cur EQ E_NULL) {
347
348 DB_EXIT("sc_trek - NULL ptr");
349 return(FAILURE);
350 }
351
352 rp = p_cur; /* current event pointer */
353 rt = t_cur; /* current event time */
354
355 DB_CMNT("sc_trek - chasing p_cur");
356
357#ifdef DEBUGGER
358 if (se EQ D_FWD)
359 DB_CMNT("sc_trek - forward");
360 else
361 DB_CMNT("sc_trek - backward");
362#endif
363
364/*
365
366*/
367 while (rt NE tval) { /* track tval */
368
369 if (se EQ D_FWD)
370 ++rt;
371 else
372 --rt;
373
374 if (rp->e_type NE EV_FINI) {
375
376 while (rp->e_time EQ rt) { /* process events a rt */
377
378 /* "erase head" logic */
379
380 if (recsw AND (se EQ D_FWD)) {
381
382 et = 0x007F & rp->e_type;
383
384 if ((NOT dubsw) AND
385 ((et EQ EV_NBEG) OR (et EQ EV_NEND))) {
386
387 grp = rp->e_data2;
388
389 if (grpstat[grp] AND (2 EQ grpmode[grp])) {
390
391 DB_CMNT("sc_trek - erasing note");
392
393 /* erasing a note */
394
395 ep = rp->e_fwd;
396
397 if (rp EQ p_bak)
398 p_bak = ep;
399
400 if (rp EQ p_cur)
401 p_cur = ep;
402
403 if (rp EQ p_ctr)
404 p_ctr = ep;
405
406 if (rp EQ p_fwd)
407 p_fwd = ep;
408
409 e_del(e_rmv(rp));
410 rp = ep;
411 goto nextev;
412 }
413/*
414
415*/
416 } else if (et EQ EV_ANVL) {
417
418 grp = 0x000F & rp->e_data1;
419
420 if (grpstat[grp] AND (2 EQ (ancmsw ?
421 varmode[0x000F & (rp->e_data1 >> 4)][grp] :
422 grpmode[grp]))) {
423
424 DB_CMNT("sc_trek - erasing var");
425
426 /* erasing an analog variable */
427
428 ep = rp->e_fwd;
429
430 if (rp EQ p_bak)
431 p_bak = ep;
432
433 if (rp EQ p_cur)
434 p_cur = ep;
435
436 if (rp EQ p_ctr)
437 p_ctr = ep;
438
439 if (rp EQ p_fwd)
440 p_fwd = ep;
441
442 e_del(e_rmv(rp));
443 rp = ep;
444 goto nextev;
445 }
446 }
447 }
448
449 if (rp->e_time EQ rt) { /* check event time */
450
451 se_exec(rp, se); /* execute event */
452
453 if (se EQ D_FWD)
454 rp = rp->e_fwd; /* point at next event */
455 else
456 rp = rp->e_bak; /* point at next event */
457 }
458
459nextev:
460 if (((se EQ D_FWD) AND (rp->e_type EQ EV_FINI)) OR
461 ((se EQ D_BAK) AND (rp->e_type EQ EV_SCORE)))
462 break;
463 }
464 }
465 }
466/*
467
468*/
469 p_cur = rp; /* update p_cur */
470 t_cur = tval; /* update t_cur */
471
472 DB_EXIT("sc_trek");
473 return(SUCCESS);
474}
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