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1/*
2 * libzvbi -- Closed Caption decoder
3 *
4 * Copyright (C) 2000, 2001, 2002 Michael H. Schimek
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301 USA.
20 */
21
22/* $Id: caption.c,v 1.28 2008/02/24 14:18:03 mschimek Exp $ */
23
24#ifdef HAVE_CONFIG_H
25# include "config.h"
26#endif
27
28#include <unistd.h>
29
30#include "misc.h"
31#include "trigger.h"
32#include "format.h"
33#include "lang.h"
34#include "hamm.h"
35#include "tables.h"
36#include "vbi.h"
37#include <android/log.h>
38#include "am_debug.h"
39
40#define elements(array) (sizeof(array) / sizeof(array[0]))
41
42#define LOG_TAG "ZVBI"
43#define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)
44#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
45
46
47#define ITV_DEBUG(x) /* x */
48#define XDS_SEP_DEBUG /* x */ printf
49#define XDS_SEP_DUMP(x) /* x */
50#define CC_DUMP(x) /* x */
51#define CC_TEXT_DUMP(x) /* x */
52
53static inline void
54caption_send_event(vbi_decoder *vbi, vbi_event *ev)
55{
56 /* Permits calling vbi_fetch_cc_page from handler */
57 pthread_mutex_unlock(&vbi->cc.mutex);
58
59 vbi_send_event(vbi, ev);
60
61 pthread_mutex_lock(&vbi->cc.mutex);
62}
63
64/*
65 * XDS (Extended Data Service) decoder
66 */
67
68#define XDS_CURRENT 0
69#define XDS_FUTURE 1
70#define XDS_CHANNEL 2
71#define XDS_MISC 3
72#define XDS_PUBLIC_SERVICE 4
73#define XDS_RESERVED 5
74#define XDS_UNDEFINED 6 /* proprietary format */
75
76#define XDS_END 15
77
78/* vbi_classify_page, program_info language */
79static const char *
80language[8] = {
81 "Unknown",
82 "English",
83 "Español",
84 "Français",
85 "Deutsch",
86 "Italiano",
87 "Other",
88 "None"
89};
90
91static uint32_t hcrc[128];
92
93static void init_hcrc(void) __attribute__ ((constructor));
94
95
96/*
97http://www.fcc.gov/cgb/statid.html
98 *
99 * XDS has no unique station id as EBU (or is the call sign?)
100 * so we create a checksum over the station name.
101 */
102static void
103init_hcrc(void)
104{
105 unsigned int sum;
106 int i, j;
107
108 for (i = 0; i < 128; i++) {
109 sum = 0;
110 for (j = 7 - 1; j >= 0; j--)
111 if (i & (1 << j))
112 sum ^= 0x48000000L >> j;
113 hcrc[i] = sum;
114 }
115}
116
117static int
118xds_strfu(signed char *d, const uint8_t *s, int len)
119{
120 int c, neq = 0;
121
122 for (; len > 0 && *s <= 0x20; s++, len--);
123
124 for (; len > 0; s++, len--) {
125 c = MAX((uint8_t) 0x20, *s);
126 neq |= *d ^ c;
127 *d++ = c;
128 }
129
130 neq |= *d;
131 *d = 0;
132
133 return neq;
134}
135
136#define xds_intfu(d, val) (neq |= d ^ (val), d = (val))
137
138static void
139flush_prog_info(vbi_decoder *vbi, vbi_program_info *pi, vbi_event *e)
140{
141 e->ev.aspect = pi->aspect;
142
143 vbi_reset_prog_info(pi);
144
145 if (memcmp(&e->ev.aspect, &pi->aspect, sizeof(pi->aspect)) != 0) {
146 e->type = VBI_EVENT_ASPECT;
147 caption_send_event(vbi, e);
148 }
149
150 vbi->cc.info_cycle[pi->future] = 0;
151}
152
153static inline void
154xds_decoder(vbi_decoder *vbi, int _class, int type,
155 uint8_t *buffer, int length)
156{
157 XDS_SEP_DEBUG("xds_decoder _class = %d,type = %d, buffer[0]=%02x, buffer[1]=%02x length = %d,\n",_class ,type,buffer[0], buffer[1],length);
158 vbi_network *n = &vbi->network.ev.network;
159 vbi_program_info *pi;
160 int neq, i;
161 vbi_event e;
162
163 if ((length <= 0) || (length > 32))
164 return;
165 //assert(length > 0 && length <= 32);
166
167// XXX we have no indication how long the program info applies.
168// It will be canceled on channel switch, but who knows
169// what the station transmits when the next program starts.
170// (Nothing, possibly.) A timeout seems necessary.
171
172 switch (_class) {
173 case XDS_CURRENT: /* 0 */
174 case XDS_FUTURE: /* 1 */
175 if (!(vbi->event_mask & (VBI_EVENT_ASPECT | VBI_EVENT_PROG_INFO | VBI_EVENT_RATING))){
176 XDS_SEP_DEBUG("vbi->event_mask & VBI_EVENT_ASPECT | VBI_EVENT_PROG_INFO");
177 return;
178 }
179 pi = &vbi->prog_info[_class];
180 neq = 0;
181
182 switch (type) {
183 case 1: /* program identification number */
184 {
185 int month, day, hour, min;
186
187 if (length != 4)
188 return;
189
190 month = buffer[3] & 15;
191 day = buffer[2] & 31;
192 hour = buffer[1] & 31;
193 min = buffer[0] & 63;
194
195 if (month == 0 || month > 12
196 || day == 0 || day > 31
197 || hour > 23 || min > 59)
198 return;
199
200 month--;
201 day--;
202
203 neq = (pi->month ^ month) | (pi->day ^ day)
204 | (pi->hour ^ hour) | (pi->min ^ min);
205
206 pi->tape_delayed = !!(buffer[3] & 0x10);
207
208 if (neq) {
209 flush_prog_info(vbi, pi, &e);
210
211 pi->month = month;
212 pi->day = day;
213 pi->hour = hour;
214 pi->min = min;
215
216 pi->tape_delayed = !!(buffer[3] & 0x10);
217 }
218
219 break;
220 }
221
222 case 2: /* program length */
223 {
224 int lhour, lmin, ehour = -1, emin = -1, esec = 0;
225
226 if (length < 2 || length > 6)
227 return;
228
229 lhour = buffer[1] & 63;
230 lmin = buffer[0] & 63;
231
232 if (length >= 3) {
233 ehour = buffer[3] & 63;
234 emin = buffer[2] & 63;
235
236 if (length >= 5)
237 esec = buffer[4] & 63;
238 }
239
240 if (lmin > 59 || emin > 59 || esec > 59)
241 return;
242
243 xds_intfu(pi->length_hour, lhour);
244 xds_intfu(pi->length_min, lmin);
245 xds_intfu(pi->elapsed_hour, ehour);
246 xds_intfu(pi->elapsed_min, emin);
247 xds_intfu(pi->elapsed_sec, esec);
248
249 break;
250 }
251
252 case 3: /* program name */
253 if (length < 2)
254 return;
255
256 neq = xds_strfu(pi->title, buffer, length);
257
258 if (!neq) { /* no title change */
259 if (!(vbi->cc.info_cycle[_class] & (1 << 3)))
260 break; /* already reported */
261
262 if (!(vbi->cc.info_cycle[_class] & (1 << 1))) {
263 /* Second occurence without PIN */
264
265 flush_prog_info(vbi, pi, &e);
266
267 xds_strfu(pi->title, buffer, length);
268 vbi->cc.info_cycle[_class] |= 1 << 3;
269 }
270 }
271
272 break;
273
274 case 4: /* program type */
275 {
276 int neq;
277
278 neq = (pi->type_classf != VBI_PROG_CLASSF_EIA_608);
279 pi->type_classf = VBI_PROG_CLASSF_EIA_608;
280
281 for (i = 0; i < length; i++) {
282 neq |= pi->type_id[i] ^ buffer[i];
283 pi->type_id[i] = buffer[i];
284 }
285
286 neq |= pi->type_id[i];
287 pi->type_id[i] = 0;
288
289 break;
290 }
291
292 case 5: /* program rating */
293 {
294 vbi_rating_auth auth;
295 int r, g, dlsv = 0;
296
297 if (length != 2)
298 return;
299
300 r = buffer[0] & 7;
301 g = buffer[1] & 7;
302 XDS_SEP_DEBUG("r = %d,g = %d\n",r,g);
303 if (buffer[0] & 0x20)
304 dlsv |= VBI_RATING_D;
305 if (buffer[1] & 0x08)
306 dlsv |= VBI_RATING_L;
307 if (buffer[1] & 0x10)
308 dlsv |= VBI_RATING_S;
309 if (buffer[1] & 0x20)
310 dlsv |= VBI_RATING_V;
311
312 if ((buffer[0] & 0x08) == 0) {
313 //if (r == 0) return;
314 auth = VBI_RATING_AUTH_MPAA;
315 pi->rating.dlsv = dlsv = 0;
316 } else if ((buffer[0] & 0x10) == 0) {
317 auth = VBI_RATING_AUTH_TV_US;
318 r = g;
319 } else if ((buffer[1] & 0x08) == 0) {
320 if ((buffer[0] & 0x20) == 0) {
321 if ((r = g) > 6) return;
322 auth = VBI_RATING_AUTH_TV_CA_EN;
323 } else {
324 if ((r = g) > 5) return;
325 auth = VBI_RATING_AUTH_TV_CA_FR;
326 }
327 pi->rating.dlsv = dlsv = 0;
328 } else
329 return;
330
331 if ((neq = (pi->rating.auth != auth
332 || pi->rating.id != r
333 || pi->rating.dlsv != dlsv))) {
334 pi->rating.auth = auth;
335 pi->rating.id = r;
336 pi->rating.dlsv = dlsv;
337 }
338 if (vbi->event_mask & VBI_EVENT_RATING){
339 e.type = VBI_EVENT_RATING;
340 e.ev.prog_info = pi;
341 caption_send_event(vbi, &e);
342 }
343
344 break;
345 }
346
347 case 6: /* program audio services */
348 {
349 static const vbi_audio_mode mode[2][8] = {
350 {
351 VBI_AUDIO_MODE_UNKNOWN,
352 VBI_AUDIO_MODE_MONO,
353 VBI_AUDIO_MODE_SIMULATED_STEREO,
354 VBI_AUDIO_MODE_STEREO,
355 VBI_AUDIO_MODE_STEREO_SURROUND,
356 VBI_AUDIO_MODE_DATA_SERVICE,
357 VBI_AUDIO_MODE_UNKNOWN, /* "other" */
358 VBI_AUDIO_MODE_NONE
359 }, {
360 VBI_AUDIO_MODE_UNKNOWN,
361 VBI_AUDIO_MODE_MONO,
362 VBI_AUDIO_MODE_VIDEO_DESCRIPTIONS,
363 VBI_AUDIO_MODE_NON_PROGRAM_AUDIO,
364 VBI_AUDIO_MODE_SPECIAL_EFFECTS,
365 VBI_AUDIO_MODE_DATA_SERVICE,
366 VBI_AUDIO_MODE_UNKNOWN, /* "other" */
367 VBI_AUDIO_MODE_NONE
368 }
369 };
370
371 if (length != 2)
372 return;
373
374 for (i = 0; i < 2; i++) {
375 int l = (buffer[i] >> 3) & 7;
376 vbi_audio_mode m = mode[i][buffer[i] & 7];
377 /* should be const char *, but I got that
378 wrong and cannot change the public
379 pi->audio[].language type now. */
380 unsigned char *s = ((1 << l) & 0xC1) ? NULL :
381 (unsigned char *) language[l];
382
383 if (pi->audio[i].mode != m) {
384 neq = 1; pi->audio[i].mode = m;
385 }
386 if (pi->audio[i].language != s) {
387 neq = 1; pi->audio[i].language = s;
388 }
389 }
390
391 break;
392 }
393
394 case 7: /* program caption services */
395 {
396 int services = 0;
397
398 if (length > 8)
399 return;
400
401 for (i = 0; i < 8; i++)
402 pi->caption_language[i] = NULL;
403
404 for (i = 0; i < length; i++) {
405 int ch = buffer[i] & 7;
406 int l = (buffer[i] >> 3) & 7;
407 /* should be const char *, but I got that
408 wrong and cannot change the public
409 pi->audio[].language type now. */
410 unsigned char *s;
411
412 ch = (ch & 1) * 4 + (ch >> 1);
413
414 services |= 1 << ch;
415 s = ((1 << l) & 0xC1) ? NULL :
416 (unsigned char *) language[l];
417
418 if (pi->caption_language[ch] != (unsigned char *) s) {
419 neq = 1; pi->caption_language[ch] = (unsigned char *) s;
420 }
421
422 if (_class == XDS_CURRENT)
423 vbi->cc.channel[ch].language =
424 pi->caption_language[ch];
425 }
426
427 xds_intfu(pi->caption_services, services);
428
429 break;
430 }
431
432 case 8: /* copy generation management system */
433 if (length != 1)
434 return;
435
436 xds_intfu(pi->cgms_a, buffer[0] & 63);
437
438 break;
439
440 case 9: /* program aspect ratio */
441 {
442 vbi_aspect_ratio *r = &e.ev.aspect;
443
444 if (length > 3)
445 return;
446
447 memset(&e, 0, sizeof(e));
448
449 r->first_line = (buffer[0] & 63) + 22;
450 r->last_line = 262 - (buffer[1] & 63);
451 r->film_mode = 0;
452 r->open_subtitles = VBI_SUBT_UNKNOWN;
453
454 if (length >= 3 && (buffer[2] & 1))
455 r->ratio = 16.0 / 9.0;
456 else
457 r->ratio = 1.0;
458
459 if (memcmp(r, &vbi->prog_info[0].aspect, sizeof(*r)) != 0) {
460 vbi->prog_info[0].aspect = *r;
461 vbi->aspect_source = 3;
462
463 e.type = VBI_EVENT_ASPECT;
464 caption_send_event(vbi, &e);
465
466 neq = 1;
467 }
468
469 break;
470 }
471
472 case 0x10 ... 0x17: /* program description */
473 {
474 int line = type & 7;
475
476 neq = xds_strfu(pi->description[line], buffer, length);
477
478 break;
479 }
480
481 default:
482 return; /* no event */
483 }
484
485 if (0)
486 printf("[type %d cycle %08x class %d neq %d]\n",
487 type, vbi->cc.info_cycle[_class], _class, neq);
488
489 if (neq){ /* first occurence of this type with this data */
490 vbi->cc.info_cycle[_class] |= 1 << type;
491 }
492 else if (vbi->cc.info_cycle[_class] & (1 << type)) {
493 /* Second occurance of this type with same data */
494
495 e.type = VBI_EVENT_PROG_INFO;
496 e.ev.prog_info = pi;
497
498 caption_send_event(vbi, &e);
499 XDS_SEP_DEBUG("caption_send_event VBI_EVENT_PROG_INFO\n");
500 vbi->cc.info_cycle[_class] = 0; /* all changes reported */
501 }
502
503 break;
504
505 case XDS_CHANNEL:
506 n->ts_id = -1;
507
508 switch (type) {
509 case 1: /* network name */
510 if (xds_strfu(n->name, buffer, length)) {
511 n->cycle = 1;
512 } else if (n->cycle == 1) {
513 signed char *s = n->name;
514 uint32_t sum;
515
516 if (n->call[0])
517 s = n->call;
518
519 for (sum = 0; *s; s++)
520 sum = (sum >> 7) ^ hcrc[(sum ^ *s) & 0x7F];
521
522 sum &= ((1UL << 31) - 1);
523 sum |= 1UL << 30;
524
525 if (n->nuid != 0)
526 vbi_chsw_reset(vbi, sum);
527
528 n->nuid = sum;
529
530 vbi->network.type = VBI_EVENT_NETWORK;
531 caption_send_event(vbi, &vbi->network);
532
533 vbi->network.type = VBI_EVENT_NETWORK_ID;
534 caption_send_event(vbi, &vbi->network);
535
536 n->cycle = 3;
537 }
538
539 break;
540
541 case 2: /* network call letters */
542 if (xds_strfu(n->call, buffer, length)) {
543 if (n->cycle != 1) {
544 n->name[0] = 0;
545 n->cycle = 0;
546 }
547 }
548
549 break;
550
551 case 3: /* channel tape delay */
552 if (length != 2)
553 return;
554
555 n->tape_delay =
556 (buffer[1] & 31) * 60 + (buffer[0] & 63);
557
558 break;
559
560 case 4: /* Transmission Signal ID */
561 if (length < 4)
562 return;
563
564 n->ts_id =
565 ((buffer[3] & 15) << 0)
566 |((buffer[2] & 15) << 4)
567 |((buffer[1] & 15) << 8)
568 |((buffer[0] & 15) << 12);
569
570 vbi->network.type = VBI_EVENT_NETWORK;
571 caption_send_event(vbi, &vbi->network);
572 break;
573
574 default:
575 break;
576 }
577
578 break;
579
580 case XDS_MISC:
581 switch (type) {
582 case 1: /* time of day */
583 if (length != 6)
584 return;
585 break;
586
587 case 2: /* impulse capture id */
588 if (length != 6)
589 return;
590 break;
591
592 case 3: /* supplemental data location */
593 break;
594
595 case 4: /* local time zone */
596 if (length != 1)
597 return;
598 break;
599
600 case 0x40: /* out-of-band channel number */
601 if (length != 2)
602 return;
603 break;
604
605 default:
606 break;
607 }
608
609 break;
610
611 default:
612 break;
613 }
614}
615
616static void
617xds_separator(vbi_decoder *vbi, uint8_t *buf)
618{
619 struct caption *cc = &vbi->cc;
620 xds_sub_packet *sp = cc->curr_sp;
621 int c1 = vbi_unpar8 (buf[0]);
622 int c2 = vbi_unpar8 (buf[1]);
623 unsigned int class, type;
624
625 XDS_SEP_DEBUG("XDS %02x %02x\n", buf[0], buf[1]);
626
627 if ((c1 | c2) < 0) {
628 XDS_SEP_DEBUG("XDS tx error, discard current packet\n");
629
630 if (sp) {
631 sp->count = 0;
632 sp->chksum = 0;
633 sp = NULL;
634 }
635
636 return;
637 }
638
639 switch (c1) {
640 case 1 ... 14:
641 class = (c1 - 1) >> 1;
642
643 if (class > elements(cc->sub_packet)
644 || c2 > (int) elements(cc->sub_packet[0])) {
645 XDS_SEP_DEBUG("XDS ignore packet %d/0x%02x\n", class, c2);
646 cc->curr_sp = NULL;
647 return;
648 }
649
650 cc->curr_sp = sp = &cc->sub_packet[class][c2];
651
652 if (c1 & 1) { /* start */
653 sp->chksum = c1 + c2;
654 sp->count = 2;
655 } else if (!sp->count) {
656 XDS_SEP_DEBUG("XDS can't continue %d/0x%02x\n", class, c2);
657 cc->curr_sp = NULL;
658 }
659
660 return;
661
662 case 15:
663 if (!sp)
664 return;
665
666 sp->chksum += c1 + c2;
667
668 class = (sp - cc->sub_packet[0]) / elements(cc->sub_packet[0]);
669 type = (sp - cc->sub_packet[0]) % elements(cc->sub_packet[0]);
670
671 if (sp->chksum & 0x7F) {
672 XDS_SEP_DEBUG("XDS ignore packet %d/0x%02x, "
673 "checksum error\n", class, type);
674 } else if (sp->count <= 2) {
675 XDS_SEP_DEBUG("XDS ignore empty packet "
676 "%d/0x%02x\n", class, type);
677 } else {
678 xds_decoder(vbi, class, type, sp->buffer, sp->count - 2);
679
680 XDS_SEP_DUMP(
681 for (i = 0; i < sp->count - 2; i++)
682 printf("%c", (sp->buffer[i])); //printf("%c", _vbi_to_ascii (sp->buffer[i]));
683 printf(" %d/0x%02x\n", class, type);
684 )
685 }
686
687 sp->count = 0;
688 sp->chksum = 0;
689 cc->curr_sp = NULL;
690
691 return;
692
693 case 0x20 ... 0x7F:
694 if (!sp)
695 return;
696
697 if (sp->count >= 32 + 2) {
698 XDS_SEP_DEBUG("XDS packet length overflow, discard %d/0x%02x\n",
699 (sp - cc->sub_packet[0]) / elements(cc->sub_packet[0]),
700 (sp - cc->sub_packet[0]) % elements(cc->sub_packet[0]));
701
702 sp->count = 0;
703 sp->chksum = 0;
704 cc->curr_sp = NULL;
705 return;
706 }
707
708 sp->buffer[sp->count - 2] = c1;
709 sp->buffer[sp->count - 1] = c2;
710 sp->chksum += c1 + c2;
711 sp->count += 1 + !!c2;
712
713 return;
714
715 default:
716 assert(!"reached");
717 }
718}
719
720static void
721itv_separator(vbi_decoder *vbi, struct caption *cc, char c)
722{
723 if (ITV_DEBUG(0 &&) !(vbi->event_mask & VBI_EVENT_TRIGGER))
724 return;
725
726 if (c >= 0x20) {
727 if (c == '<') // s4-nbc omitted CR
728 itv_separator(vbi, cc, 0);
729 else if (cc->itv_count > (int) sizeof(cc->itv_buf) - 2)
730 cc->itv_count = 0;
731
732 cc->itv_buf[cc->itv_count++] = c;
733
734 return;
735 }
736
737 cc->itv_buf[cc->itv_count] = 0;
738 cc->itv_count = 0;
739
740 ITV_DEBUG(printf("ITV: <%s>\n", cc->itv_buf));
741
742 vbi_atvef_trigger(vbi, cc->itv_buf);
743}
744
745/*
746 * Closed Caption decoder
747 */
748
749#define ROWS 15
750#define COLUMNS 34
751
752static void
753render(cc_channel *ch)
754{
755 vbi_event event;
756
757 ch->pg[2] = ch->pg[ch->hidden ^ 1];
758
759 event.type = VBI_EVENT_CAPTION;
760 event.ev.caption.pgno = ch->pg[0].pgno;
761
762 caption_send_event(ch->pg[0].vbi, &event);
763}
764
765static inline void
766update(cc_channel *ch)
767{
768 ch->update_flag = 1;
769}
770
771static void
772word_break(struct caption *cc, cc_channel *ch, int upd)
773{
774 cc = cc;
775
776 /*
777 * Add a leading and trailing space.
778 */
779#if 0
780 if (ch->col > ch->col1) {
781 vbi_char c = ch->line[ch->col1];
782
783 if ((c.unicode & 0x7F) != 0x20
784 && ch->line[ch->col1 - 1].opacity == VBI_TRANSPARENT_SPACE) {
785 c.unicode = 0x20;
786 ch->line[ch->col1 - 1] = c;
787 }
788
789 c = ch->line[ch->col - 1];
790
791 if ((c.unicode & 0x7F) != 0x20
792 && ch->line[ch->col].opacity == VBI_TRANSPARENT_SPACE) {
793 c.unicode = 0x20;
794 ch->line[ch->col] = c;
795 }
796 }
797#endif
798 if (!upd || ch->mode == MODE_POP_ON)
799 return;
800
801 /*
802 * NB we render only at spaces (end of word) and
803 * before cursor motions and mode switching, to keep the
804 * drawing efforts (scaling etc) at a minimum. update()
805 * for double buffering at word granularity.
806 *
807 * XXX should not render if space follows space,
808 * but force in long words.
809 */
810 update(ch);
811}
812
813static void
814clear_roll(cc_channel *ch)
815{
816 int i;
817
818 for (i = 0; i < ROWS; i ++) {
819 if ((i >= ch->row1) && (i < ch->row1 + ch->roll))
820 continue;
821
822 memset(ch->pg[ch->hidden ^ 1].text + i * COLUMNS, 0, sizeof(vbi_char) * COLUMNS);
823 }
824}
825
826static void
827roll_up (cc_channel *ch, int roll)
828{
829 vbi_char *acp = ch->pg[ch->hidden ^ 1].text;
830
831 memmove(acp, acp + roll * COLUMNS, (ROWS - roll) * COLUMNS * sizeof(vbi_char));
832 memset(acp + (ROWS - roll) * COLUMNS, 0, roll * COLUMNS * sizeof(vbi_char));
833
834 ch->row1 -= roll;
835 ch->row -= roll;
836
837 if (ch->row1 < 0)
838 ch->row1 = 0;
839 if (ch->row < 0)
840 ch->row = 0;
841 clear_roll(ch);
842}
843
844static inline void
845set_cursor(cc_channel *ch, int col, int row)
846{
847 int p;
848 if (row < ch->row1) {
849 ch->row1 = row;
850 if (ch->mode == MODE_ROLL_UP) {
851 clear_roll(ch);
852 update(ch);
853 }
854 } else if (row >= ch->row1 + ch->roll) {
855 ch->row1 = row - ch->roll + 1;
856 if (ch->mode == MODE_ROLL_UP) {
857 clear_roll(ch);
858 update(ch);
859 }
860 }
861
862 ch->col = ch->col1 = col;
863 ch->row = row;
864
865 p = (ch->mode == MODE_POP_ON) ? ch->hidden : (ch->hidden ^ 1);
866 ch->line = ch->pg[p].text + row * COLUMNS;
867}
868
869static void
870set_char(cc_channel *ch, int col, vbi_char c)
871{
872 if (!ch->pos_flag)
873 return;
874
875 ch->line[col] = c;
876}
877
878static void
879put_char(struct caption *cc, cc_channel *ch, vbi_char c)
880{
881 /* c.foreground = rand() & 7; */
882 /* c.background = rand() & 7; */
883
884 if (ch->col < COLUMNS - 1) {
885 set_char(ch, ch->col, c);
886 ch->col ++;
887 } else {
888 /* line break here? */
889 set_char(ch, COLUMNS - 2, c);
890 }
891
892 if (ch->mode == MODE_POP_ON)
893 return;
894
895 update(ch);
896}
897
898static inline cc_channel *
899switch_channel(struct caption *cc, int new_chan)
900{
901 switch (new_chan) {
902 case 0:
903 case 4:
904 cc->curr_chan_f1_d1 = new_chan;
905 break;
906 case 1:
907 case 5:
908 cc->curr_chan_f1_d2 = new_chan;
909 break;
910 case 2:
911 case 6:
912 cc->curr_chan_f2_d1 = new_chan;
913 break;
914 case 3:
915 case 7:
916 cc->curr_chan_f2_d2 = new_chan;
917 break;
918 }
919
920 switch (new_chan) {
921 case 0:
922 case 1:
923 case 4:
924 case 5:
925 cc->curr_chan_f1 = new_chan;
926 break;
927 case 2:
928 case 3:
929 case 6:
930 case 7:
931 cc->curr_chan_f2 = new_chan;
932 break;
933 }
934
935 return &cc->channel[cc->curr_chan = new_chan];
936}
937
938static void
939erase_memory(struct caption *cc, cc_channel *ch, int page)
940{
941 vbi_page *pg = ch->pg + page;
942
943 memset(pg->text, 0, ROWS * COLUMNS * sizeof(vbi_char));
944}
945
946static const vbi_color
947palette_mapping[8] = {
948 VBI_WHITE, VBI_GREEN, VBI_BLUE, VBI_CYAN,
949 VBI_RED, VBI_YELLOW, VBI_MAGENTA, VBI_BLACK
950};
951
952static int
953row_mapping[] = {
954 10, -1, 0, 1, 2, 3, 11, 12, 13, 14, 4, 5, 6, 7, 8, 9
955};
956
957// not verified means I didn't encounter the code in a
958// sample stream yet
959
960_vbi_inline void
961caption_command(vbi_decoder *vbi, struct caption *cc,
962 unsigned char c1, unsigned char c2, vbi_bool field2)
963{
964 XDS_SEP_DEBUG("caption_command\n");
965 cc_channel *ch;
966 vbi_char *c;
967 int chan, col, i;
968 int last_row;
969 //chan = (cc->curr_chan & 4) + field2 * 2 + ((c1 >> 3) & 1);
970
971 if (field2) {
972 chan = (c1 & 8) ? cc->curr_chan_f2_d2 : cc->curr_chan_f2_d1;
973 } else {
974 chan = (c1 & 8) ? cc->curr_chan_f1_d2 : cc->curr_chan_f1_d1;
975 }
976
977 switch_channel(cc, chan);
978
979 ch = &cc->channel[chan];
980
981 c1 &= 7;
982
983 if (c2 >= 0x40) { /* Preamble Address Codes 001 crrr 1ri xxxu */
984 int row = row_mapping[(c1 << 1) + ((c2 >> 5) & 1)];
985 int old_row = ch->row;
986
987 if (row < 0 || !ch->mode)
988 return;
989
990 ch->pos_flag = 1;
991
992 ch->attr.underline = c2 & 1;
993 ch->attr.background = VBI_BLACK;
994 ch->attr.opacity = VBI_OPAQUE;
995 ch->attr.flash = FALSE;
996
997 word_break(cc, ch, 1);
998
999 if (ch->mode == MODE_ROLL_UP) {
1000 int row1 = row - ch->roll + 1;
1001 int roll;
1002
1003 if (row1 < 0)
1004 row1 = 0;
1005
1006 roll = ch->row1 - row1;
1007 if (roll > 0) {
1008 roll_up(ch, ch->row1 - row1);
1009 update(ch);
1010 }
1011 }
1012
1013 set_cursor(ch, 1, row);
1014
1015 if (c2 & 0x10) {
1016 /*
1017 col = ch->col;
1018
1019 for (i = (c2 & 14) * 2; i > 0 && col < COLUMNS - 1; i--)
1020 ch->line[col++] = cc->transp_space[chan >> 2];
1021
1022 if (col > ch->col)
1023 ch->col = ch->col1 = col;
1024 */
1025
1026 ch->col = (c2 & 14) * 2 + 1;
1027
1028 if (old_row != ch->row) {
1029 ch->attr.italic = FALSE;
1030 ch->attr.foreground = VBI_WHITE;
1031 }
1032 } else {
1033// not verified
1034 c2 = (c2 >> 1) & 7;
1035
1036 if (c2 < 7) {
1037 ch->attr.italic = FALSE;
1038 ch->attr.foreground = palette_mapping[c2];
1039 } else {
1040 ch->attr.italic = TRUE;
1041 ch->attr.foreground = VBI_WHITE;
1042 }
1043 }
1044
1045 return;
1046 }
1047
1048 switch (c1) {
1049 case 0:
1050 /* Optional Attributes 001 c000 010 xxxt */
1051 ch->attr.opacity = (c2 & 1) ? VBI_SEMI_TRANSPARENT : VBI_OPAQUE;
1052 ch->attr.background = palette_mapping[(c2 >> 1) & 7];
1053
1054 for (i = 0; i < 2; i ++) {
1055 int col = ch->col - i;
1056
1057 if ((col > 0) && (col < COLUMNS - 1)) {
1058 vbi_char c = ch->line[col];
1059
1060 if (c.unicode == 0x20) {
1061 c.background = ch->attr.background;
1062 c.opacity = ch->attr.opacity;
1063 set_char(ch, col, c);
1064 }
1065 }
1066 }
1067 return;
1068
1069 case 1:
1070 if (c2 & 0x10) { /* Special Characters 001 c001 011 xxxx */
1071// not verified
1072 c2 &= 15;
1073
1074 if (c2 == 9) { // "transparent space"
1075 if (ch->col < COLUMNS - 1) {
1076 set_char(ch, ch->col++, cc->transp_space[chan >> 2]);
1077 ch->col1 = ch->col;
1078 } else {
1079 set_char(ch, COLUMNS - 2, cc->transp_space[chan >> 2]);
1080 }
1081
1082 } else {
1083 vbi_char c = ch->attr;
1084
1085 c.unicode = vbi_caption_unicode (0x1130 | (c2 & 15),
1086 /* to_upper */ FALSE);
1087 XDS_SEP_DEBUG("vbi_caption_unicode %c\n",c.unicode);
1088 put_char(cc, ch, c);
1089 }
1090 } else { /* Midrow Codes 001 c001 010 xxxu */
1091// not verified
1092 vbi_char c = ch->attr;
1093
1094 c.flash = FALSE;
1095 c.underline = FALSE;
1096 c.unicode = ' ';
1097
1098 put_char(cc, ch, c);
1099
1100 ch->attr.flash = FALSE;
1101 ch->attr.underline = c2 & 1;
1102
1103 c2 = (c2 >> 1) & 7;
1104
1105 if (c2 < 7) {
1106 ch->attr.italic = FALSE;
1107 ch->attr.foreground = palette_mapping[c2];
1108 } else {
1109 ch->attr.italic = TRUE;
1110 }
1111 }
1112
1113 return;
1114
1115 case 2: /* Optional Extended Characters 001 c01f 01x xxxx */
1116 case 3:
1117 /* Send specs to the maintainer of this code */
1118 {
1119 vbi_char c;
1120
1121 c = ch->attr;
1122 c.unicode = vbi_caption_unicode((c1 << 8) | c2 | 0x1000, 0);
1123
1124 if (c.unicode) {
1125 if (ch->col > 1)
1126 ch->col --;
1127
1128 put_char(cc, ch, c);
1129 }
1130 }
1131 return;
1132
1133 case 4: /* Misc Control Codes 001 c10f 010 xxxx */
1134 case 5: /* Misc Control Codes 001 c10f 010 xxxx */
1135 /* f ("field"): purpose? */
1136
1137 switch (c2 & 15) {
1138 case 0: /* Resume Caption Loading 001 c10f 010 0000 */
1139 ch = switch_channel(cc, chan & 3);
1140
1141 ch->mode = MODE_POP_ON;
1142 return;
1143
1144 /* case 4: reserved */
1145
1146 case 5: /* Roll-Up Captions 001 c10f 010 0xxx */
1147 case 6:
1148 case 7:
1149 {
1150 int roll = (c2 & 7) - 3;
1151
1152 ch = switch_channel(cc, chan & 3);
1153
1154 if (ch->mode == MODE_ROLL_UP && ch->roll == roll)
1155 return;
1156
1157 ch->mode = MODE_ROLL_UP;
1158 ch->roll = roll;
1159
1160 ch->row1 = ch->row - roll + 1;
1161 if (ch->row1 < 0)
1162 ch->row1 = 0;
1163 return;
1164 }
1165
1166 case 9: /* Resume Direct Captioning 001 c10f 010 1001 */
1167// not verified
1168 ch = switch_channel(cc, chan & 3);
1169 ch->mode = MODE_PAINT_ON;
1170 return;
1171
1172 case 10: /* Text Restart 001 c10f 010 1010 */
1173// not verified
1174 erase_memory(cc, ch, ch->hidden);
1175 erase_memory(cc, ch, ch->hidden ^ 1);
1176 ch = switch_channel(cc, chan | 4);
1177 set_cursor(ch, 1, 0);
1178 erase_memory(cc, ch, ch->hidden);
1179 erase_memory(cc, ch, ch->hidden ^ 1);
1180 return;
1181
1182 case 11: /* Resume Text Display 001 c10f 010 1011 */
1183 ch = switch_channel(cc, chan | 4);
1184 return;
1185
1186 case 15: /* End Of Caption 001 c10f 010 1111 */
1187 ch = switch_channel(cc, chan & 3);
1188 ch->mode = MODE_POP_ON;
1189
1190 word_break(cc, ch, 1);
1191
1192 ch->hidden ^= 1;
1193
1194 //erase_memory(cc, ch, ch->hidden); // yes?
1195 update(ch);
1196
1197 /*
1198 * A Preamble Address Code should follow,
1199 * reset to a known state to be safe.
1200 * Reset ch->line for new ch->hidden.
1201 * XXX row 0?
1202 */
1203 set_cursor(ch, 1, ROWS - 1);
1204
1205 return;
1206
1207 case 8: /* Flash On 001 c10f 010 1000 */
1208// not verified
1209 ch->attr.flash = TRUE;
1210 return;
1211
1212 case 1: /* Backspace 001 c10f 010 0001 */
1213// not verified
1214 if (ch->mode) {
1215 if (ch->col > 1) {
1216 if (ch->line[ch->col - 1].unicode == 0)
1217 break;
1218 ch->col --;
1219 } else if (ch->row > 0) {
1220 vbi_char *acp;
1221 int p = (ch->mode == MODE_POP_ON) ? ch->hidden : (ch->hidden ^ 1);
1222
1223 ch->row --;
1224 ch->line = ch->pg[p].text + ch->row * COLUMNS;
1225 ch->col1 = 1;
1226 ch->col = COLUMNS - 1;
1227 acp = ch->line + COLUMNS - 1;
1228
1229 while (ch->col > 1) {
1230 if (acp->unicode != 0)
1231 break;
1232
1233 acp --;
1234 ch->col --;
1235 }
1236 } else {
1237 break;
1238 }
1239
1240
1241 memset(&ch->line[ch->col], 0, sizeof(vbi_char));
1242 if (ch->col < ch->col1)
1243 ch->col1 = ch->col;
1244
1245 update(ch);
1246 }
1247
1248 return;
1249
1250 case 13: /* Carriage Return 001 c10f 010 1101 */
1251 if (ch == cc->channel + 5)
1252 itv_separator(vbi, cc, 0);
1253
1254 if ((ch->row >= ROWS - 1) && (ch->mode == MODE_ROLL_UP)) {
1255 roll_up(ch, 1);
1256 set_cursor(ch, 1, ROWS - 1);
1257 update(ch);
1258 } else if (ch->row >= ROWS - 1) {
1259 set_cursor(ch, 1, ROWS - 1);
1260 if (ch->mode != MODE_POP_ON)
1261 update(ch);
1262 } else {
1263 set_cursor(ch, 1, ch->row + 1);
1264 if (ch->mode != MODE_POP_ON)
1265 update(ch);
1266 }
1267
1268 ch->attr.underline = FALSE;
1269 ch->attr.background = VBI_BLACK;
1270 ch->attr.opacity = VBI_OPAQUE;
1271 ch->attr.flash = FALSE;
1272 ch->attr.italic = FALSE;
1273 ch->attr.foreground = VBI_WHITE;
1274
1275 return;
1276
1277 case 4: /* Delete To End Of Row 001 c10f 010 0100 */
1278// not verified
1279 if (!ch->mode)
1280 return;
1281
1282 for (i = ch->col; i <= COLUMNS - 1; i++) {
1283 memset(&ch->line[i], 0, sizeof(vbi_char));
1284 }
1285
1286 word_break(cc, ch, 0);
1287
1288 if (ch->mode != MODE_POP_ON) {
1289 update(ch);
1290 }
1291
1292 return;
1293
1294 case 12: /* Erase Displayed Memory 001 c10f 010 1100 */
1295 if (chan < 4) {
1296 erase_memory(cc, ch, ch->hidden ^ 1);
1297 update(ch);
1298 }
1299 return;
1300 case 14: /* Erase Non-Displayed Memory 001 c10f 010 1110 */
1301 erase_memory(cc, ch, ch->hidden);
1302 return;
1303 }
1304
1305 return;
1306
1307 /* case 6: reserved */
1308
1309 case 7:
1310 if (!ch->mode)
1311 return;
1312
1313 switch (c2) {
1314 case 0x21 ... 0x23: /* Misc Control Codes, Tabs 001 c111 010 00xx */
1315// not verified
1316 /*
1317 col = ch->col;
1318
1319 for (i = c2 & 3; i > 0 && col < COLUMNS - 1; i--)
1320 ch->line[col++] = cc->transp_space[chan >> 2];
1321
1322 if (col > ch->col)
1323 ch->col = ch->col1 = col;*/
1324
1325 ch->col += (c2 & 3);
1326 if (ch->col >= COLUMNS)
1327 ch->col = COLUMNS - 1;
1328
1329 return;
1330
1331 case 0x2D: /* Optional Attributes 001 c111 010 11xx */
1332// not verified
1333 ch->attr.opacity = VBI_TRANSPARENT_FULL;
1334 break;
1335
1336 case 0x2E: /* Optional Attributes 001 c111 010 11xx */
1337 case 0x2F:
1338// not verified
1339 ch->attr.foreground = VBI_BLACK;
1340 ch->attr.underline = c2 & 1;
1341 break;
1342
1343 default:
1344 return;
1345 }
1346
1347 /* Optional Attributes, backspace magic */
1348
1349 if (ch->col > 1 && (ch->line[ch->col - 1].unicode & 0x7F) == 0x20) {
1350 vbi_char c = ch->attr;
1351
1352 c.unicode = 0x0020;
1353 ch->line[ch->col - 1] = c;
1354 }
1355 }
1356}
1357
1358static void
1359update_display (vbi_decoder *vbi)
1360{
1361 struct caption *cc = &vbi->cc;
1362 int i;
1363
1364 for (i=0; i<8; i++)
1365 {
1366 cc_channel *ch = &cc->channel[i];
1367
1368 if (ch->update_flag == 1) {
1369 render(ch);
1370 ch->update_flag = 0;
1371 }
1372 }
1373}
1374
1375/**
1376 * @internal
1377 * @param vbi Initialized vbi decoding context.
1378 * @param line ITU-R line number this data originated from.
1379 * @param buf Two bytes.
1380 *
1381 * Decode two bytes of Closed Caption data (Caption, XDS, ITV),
1382 * updating the decoder state accordingly. May send events.
1383 */
1384void
1385vbi_decode_caption(vbi_decoder *vbi, int line, uint8_t *buf)
1386{
1387 XDS_SEP_DEBUG("vbi_decode_caption\n");
1388 struct caption *cc = &vbi->cc;
1389 char c1 = buf[0] & 0x7F;
1390 int field2 = 1, i;
1391
1392 pthread_mutex_lock(&cc->mutex);
1393 //AM_DEBUG(1, "vbi_data: line: %d %x %x", line, buf[0], buf[1]);
1394
1395 if (line == 21) {
1396 cc->curr_chan = cc->curr_chan_f1;
1397 memcpy(cc->last, cc->last_f1, sizeof(cc->last));
1398 } else {
1399 cc->curr_chan = cc->curr_chan_f2;
1400 memcpy(cc->last, cc->last_f2, sizeof(cc->last));
1401 }
1402
1403 switch (line) {
1404 case 21: /* NTSC */
1405 case 22: /* PAL */
1406 field2 = 0;
1407 break;
1408
1409 case 335: /* PAL, hardly XDS */
1410 break;
1411
1412 case 284: /* NTSC */
1413 CC_DUMP(
1414 putchar(_vbi_to_ascii (buf[0]));
1415 putchar(_vbi_to_ascii (buf[1]));
1416 fflush(stdout);
1417 )
1418
1419 if (vbi_unpar8 (buf[0]) >= 0) { //vbi_unpar8 (buf[0]) >= 0
1420 if (c1 == 0) {
1421 goto finish;
1422 } else if (c1 <= 0x0F) {
1423 xds_separator(vbi, buf);
1424 cc->xds = (c1 != XDS_END);
1425 goto finish;
1426 } else if (c1 <= 0x1F) {
1427 xds_sub_packet *sp = cc->curr_sp;
1428 unsigned int class, type;
1429 if (sp) {
1430 class = (sp - cc->sub_packet[0]) / elements(cc->sub_packet[0]);
1431 type = (sp - cc->sub_packet[0]) % elements(cc->sub_packet[0]);
1432 xds_decoder(vbi, class, type, sp->buffer, sp->count - 2);
1433 }
1434 cc->xds = FALSE;
1435 } else if (cc->xds) {
1436 xds_separator(vbi, buf);
1437 goto finish;
1438 }
1439 } else if (cc->xds) {
1440 xds_separator(vbi, buf);
1441 goto finish;
1442 }
1443
1444 break;
1445
1446 default:
1447 goto finish;
1448 }
1449
1450 //if ( (buf[0]) < 0) { //vbi_unpar8 (buf[0]) < 0
1451 if ( vbi_unpar8 (buf[0]) < 0) { //
1452#if 0
1453 c1 = 127;
1454 buf[0] = c1; /* traditional 'bad' glyph, ccfont has */
1455 buf[1] = c1; /* room, design a special glyph? */
1456#else
1457 goto finish;
1458#endif
1459 }
1460
1461 CC_DUMP(
1462 putchar(_vbi_to_ascii (buf[0]));
1463 putchar(_vbi_to_ascii (buf[1]));
1464 fflush(stdout);
1465 )
1466
1467 switch (c1) {
1468 cc_channel *ch;
1469 vbi_char c;
1470
1471 case 0x01 ... 0x0F:
1472 /*if (!field2)*/
1473 cc->last[0] = 0;
1474 break; /* XDS field 1?? */
1475
1476 case 0x10 ... 0x1F:
1477 //if ( (buf[1]) >= 0) { // vbi_unpar8 (buf[1])
1478 if ( vbi_unpar8 (buf[1]) >= 0) {
1479 if (/*!field2
1480 &&*/ buf[0] == cc->last[0]
1481 && buf[1] == cc->last[1]) {
1482 /* cmd repetition F1: already executed */
1483 cc->last[0] = 0; /* one rep */
1484 break;
1485 }
1486
1487 caption_command(vbi, cc, c1, buf[1] & 0x7F, field2);
1488
1489 /*if (!field2)*/ {
1490 cc->last[0] = buf[0];
1491 cc->last[1] = buf[1];
1492 }
1493 } else /*if (!field2)*/
1494 cc->last[0] = 0;
1495
1496 break;
1497
1498 default:
1499 CC_TEXT_DUMP(
1500 putchar(_vbi_to_ascii (buf[0]));
1501 putchar(_vbi_to_ascii (buf[1]));
1502 fflush(stdout);
1503 )
1504#if 0
1505 AM_DEBUG(1, "text value: %c %c %x %x", _vbi_to_ascii(buf[0]),
1506 _vbi_to_ascii(buf[1]), buf[0], buf[1]);
1507#endif
1508
1509 ch = &cc->channel[(cc->curr_chan & 5) + field2 * 2];
1510
1511 if (buf[0] == 0x80 && buf[1] == 0x80) {
1512 if (ch->mode) {
1513 if (ch->nul_ct == 2)
1514 word_break(cc, ch, 1);
1515 ch->nul_ct += 2;
1516 }
1517
1518 break;
1519 }
1520
1521 /*if (!field2)*/
1522 cc->last[0] = 0;
1523
1524 ch->nul_ct = 0;
1525
1526 if (!ch->mode)
1527 break;
1528
1529 ch->time = vbi->time; /* activity measure */
1530
1531 c = ch->attr;
1532
1533 for (i = 0; i < 2; i++) {
1534 //char ci = (buf[i]) & 0x7F; /* 127 if bad */ //vbi_unpar8 (buf[i])
1535 char ci = vbi_unpar8 (buf[i]) & 0x7F; /* 127 if bad */
1536 if (ci <= 0x1F) /* 0x00 no char, 0x01 ... 0x1F invalid */
1537 continue;
1538
1539 if (ch == cc->channel + 5) // 'T2'
1540 itv_separator(vbi, cc, ci);
1541
1542 c.unicode = vbi_caption_unicode(ci, /* to_upper */ FALSE);
1543
1544 put_char(cc, ch, c);
1545 }
1546 }
1547
1548 update_display(vbi);
1549
1550 if (line == 21) {
1551 //cc->curr_chan_f1 = cc->curr_chan;
1552 memcpy(cc->last_f1, cc->last, sizeof(cc->last));
1553 } else {
1554 //cc->curr_chan_f2 = cc->curr_chan;
1555 memcpy(cc->last_f2, cc->last, sizeof(cc->last));
1556 }
1557
1558 finish:
1559 pthread_mutex_unlock(&cc->mutex);
1560}
1561
1562/**
1563 * @internal
1564 * @param vbi Initialized vbi decoding context.
1565 *
1566 * This function must be called after desynchronisation
1567 * has been detected (i. e. vbi data has been lost)
1568 * to reset the Closed Caption decoder.
1569 */
1570void
1571vbi_caption_desync(vbi_decoder *vbi)
1572{
1573 struct caption *cc = &vbi->cc;
1574
1575 /* cc->curr_chan = 8; *//* garbage */
1576
1577 /* cc->xds = FALSE; */
1578
1579 if (cc->curr_sp) {
1580 memset(cc->curr_sp, 0, sizeof(*(cc->curr_sp)));
1581 cc->curr_sp = NULL;
1582 }
1583
1584 cc->itv_count = 0;
1585}
1586
1587/**
1588 * @internal
1589 * @param vbi Initialized vbi decoding context.
1590 *
1591 * This function must be called after a channel switch,
1592 * to reset the Closed Caption decoder.
1593 */
1594void
1595vbi_caption_channel_switched(vbi_decoder *vbi)
1596{
1597 struct caption *cc = &vbi->cc;
1598 cc_channel *ch;
1599 int i;
1600
1601 for (i = 0; i < 9; i++) {
1602 ch = &cc->channel[i];
1603
1604 if (i < 4) {
1605 ch->mode = MODE_NONE; // MODE_ROLL_UP;
1606 ch->row = ROWS - 1;
1607 ch->row1 = ROWS - 4;
1608 ch->roll = 4;
1609 } else {
1610 ch->mode = MODE_TEXT;
1611 ch->row1 = ch->row = 0;
1612 ch->roll = ROWS;
1613 }
1614
1615 ch->attr.opacity = VBI_OPAQUE;
1616 ch->attr.foreground = VBI_WHITE;
1617 ch->attr.background = VBI_BLACK;
1618
1619 set_cursor(ch, 1, ch->row);
1620
1621 ch->time = 0.0;
1622
1623 ch->hidden = 0;
1624
1625 ch->pg[0].dirty.y0 = 0;
1626 ch->pg[0].dirty.y1 = ROWS - 1;
1627 ch->pg[0].dirty.roll = 0;
1628
1629 erase_memory(cc, ch, 0);
1630
1631 memcpy(&ch->pg[1], &ch->pg[0], sizeof(ch->pg[1]));
1632 }
1633
1634 cc->xds = FALSE;
1635
1636 memset(&cc->sub_packet, 0, sizeof(cc->sub_packet));
1637
1638 cc->info_cycle[0] = 0;
1639 cc->info_cycle[1] = 0;
1640
1641 vbi_caption_desync(vbi);
1642}
1643
1644static vbi_rgba
1645default_color_map[8] = {
1646 VBI_RGBA(0x00, 0x00, 0x00), VBI_RGBA(0xFF, 0x00, 0x00),
1647 VBI_RGBA(0x00, 0xFF, 0x00), VBI_RGBA(0xFF, 0xFF, 0x00),
1648 VBI_RGBA(0x00, 0x00, 0xFF), VBI_RGBA(0xFF, 0x00, 0xFF),
1649 VBI_RGBA(0x00, 0xFF, 0xFF), VBI_RGBA(0xFF, 0xFF, 0xFF)
1650};
1651
1652/**
1653 * @internal
1654 * @param vbi Initialized vbi decoding context.
1655 *
1656 * After the client changed text brightness and saturation
1657 * this function adjusts the Closed Caption color palette.
1658 */
1659void
1660vbi_caption_color_level(vbi_decoder *vbi)
1661{
1662 int i;
1663
1664 vbi_transp_colormap(vbi, vbi->cc.channel[0].pg[0].color_map,
1665 default_color_map, 8);
1666
1667 for (i = 1; i < 16; i++)
1668 memcpy(vbi->cc.channel[i >> 1].pg[i & 1].color_map,
1669 vbi->cc.channel[0].pg[0].color_map,
1670 sizeof(default_color_map));
1671}
1672
1673/**
1674 * @internal
1675 * @param vbi VBI decoding context.
1676 *
1677 * This function is called during @a vbi destruction
1678 * to destroy Closed Caption subset of @a vbi.
1679 */
1680void
1681vbi_caption_destroy(vbi_decoder *vbi)
1682{
1683 pthread_mutex_destroy(&vbi->cc.mutex);
1684}
1685
1686/**
1687 * @internal
1688 * @param vbi VBI decoding context.
1689 *
1690 * This function is called during @a vbi initialization
1691 * to initialize the Closed Caption subset of @a vbi.
1692 */
1693void
1694vbi_caption_init(vbi_decoder *vbi)
1695{
1696 struct caption *cc = &vbi->cc;
1697 cc_channel *ch;
1698 int i;
1699
1700 memset(cc, 0, sizeof(struct caption));
1701
1702 cc->curr_chan_f1 = 0;
1703 cc->curr_chan_f2 = 2;
1704 cc->curr_chan_f1_d1 = 0;
1705 cc->curr_chan_f1_d2 = 1;
1706 cc->curr_chan_f2_d1 = 2;
1707 cc->curr_chan_f2_d2 = 3;
1708
1709 pthread_mutex_init(&cc->mutex, NULL);
1710
1711 for (i = 0; i < 9; i++) {
1712 ch = &cc->channel[i];
1713
1714 ch->pg[0].vbi = vbi;
1715
1716 ch->pg[0].pgno = i + 1;
1717 ch->pg[0].subno = 0;
1718
1719 ch->pg[0].rows = ROWS;
1720 ch->pg[0].columns = COLUMNS;
1721
1722 ch->pg[0].screen_color = 0;
1723 ch->pg[0].screen_opacity = (i < 4) ? VBI_TRANSPARENT_SPACE : VBI_OPAQUE;
1724
1725 ch->pg[0].font[0] = vbi_font_descriptors; /* English */
1726 ch->pg[0].font[1] = vbi_font_descriptors;
1727
1728 memcpy(&ch->pg[1], &ch->pg[0], sizeof(ch->pg[1]));
1729 memcpy(&ch->pg[2], &ch->pg[0], sizeof(ch->pg[2]));
1730
1731 if (i >= 4)
1732 ch->pos_flag = 1;
1733 }
1734
1735 for (i = 0; i < 2; i++) {
1736 cc->transp_space[i].foreground = VBI_WHITE;
1737 cc->transp_space[i].background = VBI_BLACK;
1738 cc->transp_space[i].unicode = 0x0020;
1739 }
1740
1741 cc->transp_space[0].opacity = VBI_TRANSPARENT_SPACE;
1742 cc->transp_space[1].opacity = VBI_OPAQUE;
1743
1744 vbi_caption_channel_switched(vbi);
1745
1746 vbi_caption_color_level(vbi);
1747}
1748
1749/**
1750 * @param vbi Initialized vbi decoding context.
1751 * @param pg Place to store the formatted page.
1752 * @param pgno Page number 1 ... 8 of the page to fetch, see vbi_pgno.
1753 * @param reset @c TRUE resets the vbi_page dirty fields in cache after
1754 * fetching. Pass @c FALSE only if you plan to call this function again
1755 * to update other displays.
1756 *
1757 * Fetches a Closed Caption page designated by @a pgno from the cache,
1758 * formats and stores it in @a pg. CC pages are transmitted basically in
1759 * two modes: at once and character by character ("roll-up" mode).
1760 * Either way you get a snapshot of the page as it should appear on
1761 * screen at present. With vbi_event_handler_add() you can request a
1762 * @c VBI_EVENT_CAPTION event to be notified about pending changes
1763 * (in case of "roll-up" mode that is with each new word received)
1764 * and the vbi_page->dirty fields will mark the lines actually in
1765 * need of updates, to speed up rendering.
1766 *
1767 * Although safe to do, this function is not supposed to be
1768 * called from an event handler, since rendering may block decoding
1769 * for extended periods of time.
1770 *
1771 * @return
1772 * @c FALSE if some error occured.
1773 */
1774vbi_bool
1775vbi_fetch_cc_page(vbi_decoder *vbi, vbi_page *pg, vbi_pgno pgno, vbi_bool reset)
1776{
1777 cc_channel *ch = vbi->cc.channel + ((pgno - 1) & 7);
1778 vbi_page *spg;
1779
1780 reset = reset;
1781
1782 if (pgno < 1 || pgno > 8)
1783 return FALSE;
1784
1785 pthread_mutex_lock(&vbi->cc.mutex);
1786
1787 spg = ch->pg + 2;
1788
1789 memcpy(pg, spg, sizeof(*pg)); /* shortcut? */
1790
1791 spg->dirty.y0 = ROWS;
1792 spg->dirty.y1 = -1;
1793 spg->dirty.roll = 0;
1794
1795 pthread_mutex_unlock(&vbi->cc.mutex);
1796
1797 return 1;
1798}
1799
1800void vbi_refresh_cc(vbi_decoder *vbi)
1801{
1802 cc_channel *ch;
1803 vbi_page *spg;
1804 int i, j;
1805 vbi_event event;
1806 struct timespec now;
1807 int flash;
1808
1809 clock_gettime(CLOCK_REALTIME, &now);
1810
1811 flash = (now.tv_nsec / 250000000) & 1;
1812
1813 pthread_mutex_lock(&vbi->cc.mutex);
1814
1815 if (flash != vbi->cc.flash_state) {
1816 vbi->cc.flash_state = flash;
1817
1818 for (i = 0; i < 8; i++)
1819 {
1820 ch = &vbi->cc.channel[i];
1821 spg = ch->pg + 2;
1822 for (j = 0; j < ROWS * COLUMNS; j++)
1823 {
1824 if (spg->text[j].flash)
1825 {
1826 update(ch);
1827 break;
1828 }
1829 }
1830 }
1831
1832 update_display(vbi);
1833 }
1834
1835 pthread_mutex_unlock(&vbi->cc.mutex);
1836}
1837
1838/*
1839Local variables:
1840c-set-style: K&R
1841c-basic-offset: 8
1842End:
1843*/
1844
generated by cgit at 2024-05-17 18:36:11 (GMT)