filter/audiod: Be nice to filters without close method.
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file audiod.c the paraslash's audio daemon */
8 #include <regex.h>
9 #include <sys/types.h>
10 #include <dirent.h>
11 #include <signal.h>
12 #include <openssl/rc4.h>
13 #include <stdbool.h>
14
15 #include "para.h"
16 #include "error.h"
17 #include "crypt.h"
18 #include "audiod.cmdline.h"
19 #include "list.h"
20 #include "sched.h"
21 #include "ggo.h"
22 #include "recv.h"
23 #include "buffer_tree.h"
24 #include "filter.h"
25 #include "grab_client.h"
26 #include "client.cmdline.h"
27 #include "client.h"
28 #include "audiod.h"
29 #include "net.h"
30 #include "daemon.h"
31 #include "string.h"
32 #include "fd.h"
33 #include "write.h"
34 #include "write_common.h"
35 #include "signal.h"
36
37 /** define the array of error lists needed by para_audiod */
38 INIT_AUDIOD_ERRLISTS;
39 /** define the array containing all supported audio formats */
40 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
41
42 /** Defines how audiod handles one supported audio format. */
43 struct audio_format_info {
44 /** pointer to the receiver for this audio format */
45 struct receiver *receiver;
46 /** the receiver configuration */
47 void *receiver_conf;
48 /** the number of filters that should be activated for this audio format */
49 unsigned int num_filters;
50 /** Array of filter numbers to be activated. */
51 unsigned *filter_nums;
52 /** Pointer to the array of filter configurations. */
53 void **filter_conf;
54 /** the number of filters that should be activated for this audio format */
55 unsigned int num_writers;
56 /** Array of writer numbers to be activated. */
57 int *writer_nums;
58 /** pointer to the array of writer configurations */
59 void **writer_conf;
60 /** do not start receiver/filters/writer before this time */
61 struct timeval restart_barrier;
62 };
63
64 /**
65 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
66 * be associated with a receiver/filter/writer triple. This array holds all
67 * information on the status of these slots.
68 *
69 * \sa struct slot_info
70 * */
71 struct slot_info slot[MAX_STREAM_SLOTS];
72
73 /** The vss status flags audiod is interested in. */
74 enum vss_status_flags {
75 /** Whether the 'N' flag is set. */
76 VSS_STATUS_FLAG_NEXT = 1,
77 /** The 'P' flag is set. */
78 VSS_STATUS_FLAG_PLAYING = 2,
79 };
80
81 /**
82 * The task for obtaining para_server's status (para_client stat).
83 *
84 * \sa struct task, struct sched.
85 */
86 struct status_task {
87 /** The associated task structure of audiod. */
88 struct task task;
89 /** Client data associated with the stat task. */
90 struct client_task *ct;
91 /** Do not restart client command until this time. */
92 struct timeval restart_barrier;
93 /** Last time we received status data from para_server. */
94 struct timeval last_status_read;
95 /** The offset value announced by para_server. */
96 int offset_seconds;
97 /** The length of the current audio file as announced by para_server. */
98 int length_seconds;
99 /** The start of the current stream from the view of para_server. */
100 struct timeval server_stream_start;
101 /** The average time deviation between para_server and para_audiod. */
102 struct timeval sa_time_diff;
103 /** Whether client time is ahead of server time. */
104 int sa_time_diff_sign;
105 /** The 'P' and the 'N' flags as announced by para_server. */
106 enum vss_status_flags vss_status;
107 /** Number of times the clock difference is to be checked. */
108 unsigned clock_diff_count;
109 /** When to start the next check for clock difference. */
110 struct timeval clock_diff_barrier;
111 /** Number of the audio format as announced by para_server. */
112 int current_audio_format_num;
113 };
114
115 /** The array of status items sent by para_server. */
116 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
117
118 /**
119 * the current mode of operation of which can be changed by the on/off/cycle
120 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
121 */
122 int audiod_status = AUDIOD_ON;
123
124 /**
125 * the gengetopt args_info struct that holds information on all command line
126 * arguments
127 */
128 struct audiod_args_info conf;
129
130 static char *socket_name;
131 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
132
133 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
134
135 static struct status_task status_task_struct;
136
137 /**
138 * the task that calls the status command of para_server
139 *
140 * \sa struct status_task
141 */
142 static struct status_task *stat_task = &status_task_struct;
143 static struct timeval initial_delay_barrier;
144
145 /**
146 * the task for handling audiod commands
147 *
148 * \sa struct task, struct sched
149 */
150 struct command_task {
151 /** the local listening socket */
152 int fd;
153 /** the associated task structure */
154 struct task task;
155 };
156
157 /** iterate over all supported audio formats */
158 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
159
160 /**
161 * get the audio format number
162 * \param name the name of the audio format
163 *
164 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
165 * \a name is not a supported audio format.
166 */
167 int get_audio_format_num(const char *name)
168 {
169 int i;
170
171 while (para_isspace(*name))
172 name++;
173 FOR_EACH_AUDIO_FORMAT(i)
174 if (!strcmp(name, audio_formats[i]))
175 return i;
176 return -E_UNSUPPORTED_AUDIO_FORMAT;
177 }
178
179 char *get_time_string(int slot_num)
180 {
181 int ret, seconds = 0, length;
182 struct timeval *tmp, sum, sss, /* server stream start */
183 rstime, /* receiver start time */
184 wstime, /* writer start time */
185 wtime, /* now - writer start */
186 rskip; /* receiver start - sss */
187 struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
188 char *msg;
189
190 if (audiod_status == AUDIOD_OFF)
191 goto empty;
192 if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
193 if (stat_task->length_seconds) /* paused */
194 return NULL;
195 goto empty; /* stopped */
196 }
197 if (audiod_status == AUDIOD_ON && !s)
198 goto empty;
199 /*
200 * Valid status items and playing, set length and tmp to the stream
201 * start. We use the slot info and fall back to the info from current
202 * status items if no slot info is available.
203 */
204 length = stat_task->length_seconds;
205 tmp = &stat_task->server_stream_start;
206 if (s && s->wns) { /* writer active in this slot */
207 btr_get_node_start(s->wns[0].btrn, &wstime);
208 if (wstime.tv_sec != 0) { /* writer wrote something */
209 if (s->server_stream_start.tv_sec == 0) {
210 /* copy status info to slot */
211 s->server_stream_start = stat_task->server_stream_start;
212 s->offset_seconds = stat_task->offset_seconds;
213 s->seconds_total = stat_task->length_seconds;
214 }
215 length = s->seconds_total;
216 tmp = &s->server_stream_start;
217 }
218 }
219 if (stat_task->sa_time_diff_sign > 0)
220 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
221 else
222 tv_add(tmp, &stat_task->sa_time_diff, &sss);
223 if (!s || !s->wns) {
224 struct timeval diff;
225 tv_diff(now, &sss, &diff);
226 seconds = diff.tv_sec + stat_task->offset_seconds;
227 goto out;
228 }
229 tv_diff(now, &wstime, &wtime);
230 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
231 seconds = s->offset_seconds;
232 btr_get_node_start(s->receiver_node->btrn, &rstime);
233 ret = tv_diff(&rstime, &sss, &rskip);
234 if (ret > 0) { /* audiod was started in the middle of the stream */
235 tv_add(&wtime, &rskip, &sum);
236 seconds += sum.tv_sec;
237 } else
238 seconds += wtime.tv_sec;
239 out:
240 seconds = PARA_MIN(seconds, length);
241 seconds = PARA_MAX(seconds, 0);
242 msg = make_message(
243 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
244 s? "" : "~",
245 seconds / 60,
246 seconds % 60,
247 (length - seconds) / 60,
248 (length - seconds) % 60,
249 length? (seconds * 100 + length / 2) / length : 0,
250 length / 60,
251 length % 60
252 );
253 PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
254 return msg;
255 empty:
256 return para_strdup(NULL);
257 }
258
259 static int want_colors(void)
260 {
261 if (conf.color_arg == color_arg_no)
262 return 0;
263 if (conf.color_arg == color_arg_yes)
264 return 1;
265 if (conf.logfile_given)
266 return 0;
267 return isatty(STDERR_FILENO);
268 }
269
270 static void parse_config_or_die(void)
271 {
272 int ret;
273 char *config_file;
274 struct audiod_cmdline_parser_params params = {
275 .override = 0,
276 .initialize = 0,
277 .check_required = 1,
278 .check_ambiguity = 0,
279 .print_errors = 1
280 };
281
282 if (conf.config_file_given)
283 config_file = para_strdup(conf.config_file_arg);
284 else {
285 char *home = para_homedir();
286 config_file = make_message("%s/.paraslash/audiod.conf", home);
287 free(home);
288 }
289 ret = file_exists(config_file);
290 if (conf.config_file_given && !ret) {
291 PARA_EMERG_LOG("can not read config file %s\n", config_file);
292 goto err;
293 }
294 if (ret)
295 audiod_cmdline_parser_config_file(config_file, &conf, &params);
296 free(config_file);
297 daemon_set_loglevel(conf.loglevel_arg);
298 return;
299 err:
300 free(config_file);
301 exit(EXIT_FAILURE);
302 }
303
304 static void setup_signal_handling(void)
305 {
306 sig_task->fd = para_signal_init();
307 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
308 para_install_sighandler(SIGINT);
309 para_install_sighandler(SIGTERM);
310 para_install_sighandler(SIGHUP);
311 para_sigaction(SIGPIPE, SIG_IGN);
312 }
313
314 static void clear_slot(int slot_num)
315 {
316 struct slot_info *s = &slot[slot_num];
317
318 PARA_INFO_LOG("clearing slot %d\n", slot_num);
319 memset(s, 0, sizeof(struct slot_info));
320 s->format = -1;
321 }
322
323 static void close_receiver(int slot_num)
324 {
325 struct slot_info *s = &slot[slot_num];
326 struct audio_format_info *a;
327 struct timeval restart_delay = {0, 200 * 1000};
328
329 if (s->format < 0 || !s->receiver_node)
330 return;
331 a = &afi[s->format];
332 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
333 audio_formats[s->format], slot_num);
334 a->receiver->close(s->receiver_node);
335 btr_free_node(s->receiver_node->btrn);
336 free(s->receiver_node);
337 s->receiver_node = NULL;
338 tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
339 }
340
341 static void writer_cleanup(struct writer_node *wn)
342 {
343 struct writer *w;
344
345 if (!wn)
346 return;
347 w = writers + wn->writer_num;
348 PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
349 w->close(wn);
350 btr_free_node(wn->btrn);
351 }
352
353 static void close_writers(struct slot_info *s)
354 {
355 struct audio_format_info *a;
356 int i;
357
358 if (s->format < 0)
359 return;
360 a = afi + s->format;
361 if (a->num_writers == 0)
362 writer_cleanup(s->wns);
363 else {
364 for (i = 0; i < a->num_writers; i++)
365 writer_cleanup(s->wns + i);
366 }
367 free(s->wns);
368 s->wns = NULL;
369 }
370
371 static void close_filters(struct slot_info *s)
372 {
373 int i;
374 struct audio_format_info *a = afi + s->format;
375 if (a->num_filters == 0)
376 return;
377 for (i = 0; i < a->num_filters; i++) {
378 struct filter_node *fn = s->fns + i;
379 struct filter *f;
380
381 if (!fn)
382 continue;
383 f = filters + fn->filter_num;
384 if (f->close)
385 f->close(fn);
386 btr_free_node(fn->btrn);
387 }
388 free(s->fns);
389 s->fns = NULL;
390 }
391
392 static void kill_all_decoders(int error)
393 {
394 int i, j;
395
396 FOR_EACH_SLOT(i) {
397 struct slot_info *s = &slot[i];
398 struct audio_format_info *a;
399 if (s->format < 0)
400 continue;
401 a = afi + s->format;
402 if (s->wns)
403 for (j = 0; j < a->num_writers; j++)
404 s->wns[j].task.error = error;
405 if (s->fns)
406 for (j = 0; j < a->num_writers; j++)
407 s->fns[j].task.error = error;
408 if (s->receiver_node)
409 s->receiver_node->task.error = error;
410 }
411 }
412
413 static int get_empty_slot(void)
414 {
415 int i;
416 struct slot_info *s;
417
418 FOR_EACH_SLOT(i) {
419 s = &slot[i];
420 if (s->format < 0) {
421 clear_slot(i);
422 return i;
423 }
424 if (s->wns || s->receiver_node || s->fns)
425 continue;
426 clear_slot(i);
427 return i;
428 }
429 return -E_NO_MORE_SLOTS;
430 }
431
432 /**
433 * get the number of filters
434 *
435 * \param audio_format_num the number identifying the audio format
436 *
437 * \return the number of filters for the given audio format
438 *
439 * \sa struct filter;
440 */
441 int num_filters(int audio_format_num)
442 {
443 return afi[audio_format_num].num_filters;
444 }
445
446 static void open_filters(struct slot_info *s)
447 {
448 struct audio_format_info *a = afi + s->format;
449 struct filter_node *fn;
450 int nf = a->num_filters;
451 struct btr_node *parent;
452 int i;
453
454 if (nf == 0)
455 return;
456 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
457 assert(s->fns == NULL);
458 s->fns = para_calloc(nf * sizeof(struct filter_node));
459 parent = s->receiver_node->btrn;
460 for (i = 0; i < nf; i++) {
461 struct filter *f = filters + a->filter_nums[i];
462 fn = s->fns + i;
463 fn->filter_num = a->filter_nums[i];
464 fn->conf = a->filter_conf[i];
465 fn->task.pre_select = f->pre_select;
466 fn->task.post_select = f->post_select;
467 fn->btrn = btr_new_node(f->name, parent, f->execute, fn);
468 f->open(fn);
469 register_task(&fn->task);
470 parent = fn->btrn;
471 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
472 audio_formats[s->format], i, nf, f->name, s - slot);
473 sprintf(fn->task.status, "%s (slot %d)", f->name, s - slot);
474 }
475 }
476
477 static void open_writers(struct slot_info *s)
478 {
479 int i;
480 struct audio_format_info *a = afi + s->format;
481 struct writer_node *wn;
482 struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
483
484 assert(s->wns == NULL);
485 s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
486 * sizeof(struct writer_node));
487 if (a->num_writers == 0)
488 setup_writer_node(NULL, parent, s->wns);
489 else {
490 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
491 for (i = 0; i < a->num_writers; i++) {
492 wn = s->wns + i;
493 wn->conf = a->writer_conf[i];
494 wn->writer_num = a->writer_nums[i];
495 register_writer_node(wn, parent);
496 }
497 }
498 }
499
500 /* returns slot num on success */
501 static int open_receiver(int format)
502 {
503 struct audio_format_info *a = &afi[format];
504 struct slot_info *s;
505 int ret, slot_num;
506 struct receiver *r = a->receiver;
507 struct receiver_node *rn;
508 const struct timeval restart_delay = {2, 0};
509
510 ret = get_empty_slot();
511 if (ret < 0)
512 goto err;
513 slot_num = ret;
514 s = &slot[slot_num];
515 s->format = format;
516 s->receiver_node = para_calloc(sizeof(struct receiver_node));
517 rn = s->receiver_node;
518 rn->receiver = r;
519 rn->conf = a->receiver_conf;
520 rn->btrn = btr_new_node(r->name, NULL, NULL, rn);
521 ret = r->open(rn);
522 if (ret < 0) {
523 btr_free_node(rn->btrn);
524 free(rn);
525 s->receiver_node = NULL;
526 goto err;
527 }
528 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
529 audio_formats[s->format], r->name, slot_num);
530 rn->task.pre_select = r->pre_select;
531 rn->task.post_select = r->post_select;
532 sprintf(rn->task.status, "%s receiver node", r->name);
533 register_task(&rn->task);
534 ret = slot_num;
535 err:
536 if (ret < 0)
537 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
538 tv_add(now, &restart_delay, &afi[format].restart_barrier);
539 return ret;
540 }
541
542 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
543 static int receiver_running(int format)
544 {
545 int i, ret = 0;
546
547 FOR_EACH_SLOT(i) {
548 struct slot_info *s = &slot[i];
549 if (s->format != format)
550 continue;
551 if (!s->receiver_node)
552 continue;
553 if (s->receiver_node->task.error >= 0)
554 return 1;
555 ret = -1;
556 }
557 return ret;
558 }
559
560 struct btr_node *audiod_get_btr_root(void)
561 {
562 int i, newest_slot = -1;
563 struct timeval newest_rstime = {0, 0};
564
565 FOR_EACH_SLOT(i) {
566 struct slot_info *s = &slot[i];
567 struct timeval rstime;
568 if (!s->receiver_node)
569 continue;
570 if (s->receiver_node->task.error < 0)
571 continue;
572 btr_get_node_start(s->receiver_node->btrn, &rstime);
573 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
574 continue;
575 newest_rstime = rstime;
576 newest_slot = i;
577 }
578 if (newest_slot == -1)
579 return NULL;
580 return slot[newest_slot].receiver_node->btrn;
581 }
582
583 /* returns slot num on success. */
584 static int open_current_receiver(struct sched *s)
585 {
586 struct timeval diff;
587 int ret, cafn = stat_task->current_audio_format_num;
588
589 if (cafn < 0 || !stat_task->ct)
590 return -1;
591 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
592 if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
593 return -1;
594 ret = receiver_running(cafn);
595 if (ret > 0) /* already running and not eof */
596 return -1;
597 if (ret < 0) { /* eof */
598 /*
599 * para_server uses a zero start time during the announcement
600 * period, i.e. before it sends the first chunk. Wait until
601 * this period begins to avoid restarting the receiver that
602 * belongs to the file just completed.
603 */
604 if (stat_task->server_stream_start.tv_sec != 0) {
605 sched_request_timeout_ms(100, s);
606 return -1;
607 }
608 }
609 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
610 if (tv_diff(&s->timeout, &diff, NULL) > 0)
611 sched_request_timeout(&diff, s);
612 else
613 sched_min_delay(s);
614 return -1;
615 }
616 /* start a new receiver */
617 return open_receiver(cafn);
618 }
619
620 static unsigned compute_time_diff(const struct timeval *status_time)
621 {
622 struct timeval tmp, diff;
623 static unsigned count;
624 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
625 const struct timeval max_deviation = {0, 500 * 1000};
626 const int time_smooth = 5;
627
628 if (!status_time)
629 return count;
630 sign = tv_diff(status_time, now, &diff);
631 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
632 // sign, sa_time_diff_sign);
633 if (!count) {
634 sa_time_diff_sign = sign;
635 stat_task->sa_time_diff = diff;
636 count++;
637 goto out;
638 }
639 if (count > 5) {
640 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
641 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
642 PARA_WARNING_LOG("time diff jump: %lims\n",
643 s * tv2ms(&tmp));
644 }
645 count++;
646 sa_time_diff_sign = tv_convex_combination(
647 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
648 count > 10? sign : sign * time_smooth, &diff,
649 &tmp);
650 stat_task->sa_time_diff = tmp;
651 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
652 sign > 0? "+" : "-",
653 tv2ms(&diff),
654 sa_time_diff_sign ? "+" : "-",
655 tv2ms(&stat_task->sa_time_diff)
656 );
657 out:
658 stat_task->sa_time_diff_sign = sa_time_diff_sign;
659 return count;
660 }
661
662 static int update_item(int itemnum, char *buf)
663 {
664 long unsigned sec, usec;
665
666 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
667 return 1;
668 free(stat_item_values[itemnum]);
669 stat_item_values[itemnum] = para_strdup(buf);
670 stat_client_write_item(itemnum);
671 switch (itemnum) {
672 case SI_STATUS_FLAGS:
673 stat_task->vss_status = 0;
674 if (strchr(buf, 'N'))
675 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
676 if (strchr(buf, 'P'))
677 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
678 break;
679 case SI_OFFSET:
680 stat_task->offset_seconds = atoi(buf);
681 break;
682 case SI_SECONDS_TOTAL:
683 stat_task->length_seconds = atoi(buf);
684 break;
685 case SI_STREAM_START:
686 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
687 struct timeval a_start, delay;
688 delay.tv_sec = conf.stream_delay_arg / 1000;
689 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
690 stat_task->server_stream_start.tv_sec = sec;
691 stat_task->server_stream_start.tv_usec = usec;
692 if (compute_time_diff(NULL) > 2) {
693 if (stat_task->sa_time_diff_sign < 0)
694 tv_add(&stat_task->server_stream_start,
695 &stat_task->sa_time_diff, &a_start);
696 else
697 tv_diff(&stat_task->server_stream_start,
698 &stat_task->sa_time_diff, &a_start);
699 tv_add(&a_start, &delay, &initial_delay_barrier);
700 }
701 }
702 break;
703 case SI_CURRENT_TIME:
704 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
705 struct timeval tv = {sec, usec};
706 compute_time_diff(&tv);
707 }
708 break;
709 case SI_FORMAT:
710 stat_task->current_audio_format_num
711 = get_audio_format_num(buf);
712 }
713 return 1;
714 }
715
716 static int parse_stream_command(const char *txt, char **cmd)
717 {
718 char *p = strchr(txt, ':');
719 int i;
720
721 if (!p)
722 return -E_MISSING_COLON;
723 p++;
724 FOR_EACH_AUDIO_FORMAT(i) {
725 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
726 continue;
727 *cmd = p;
728 return i;
729 }
730 return -E_UNSUPPORTED_AUDIO_FORMAT;
731 }
732
733 static int add_filter(int format, char *cmdline)
734 {
735 struct audio_format_info *a = &afi[format];
736 int filter_num, nf = a->num_filters;
737
738 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
739 if (filter_num < 0)
740 return filter_num;
741 a->filter_nums[nf] = filter_num;
742 a->num_filters++;
743 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
744 filters[filter_num].name);
745 return filter_num;
746 }
747
748 static int parse_writer_args(void)
749 {
750 int i, ret, nw;
751 char *cmd;
752 struct audio_format_info *a;
753
754 nw = PARA_MAX(1U, conf.writer_given);
755 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
756 FOR_EACH_AUDIO_FORMAT(i) {
757 a = &afi[i];
758 a->writer_conf = para_malloc(nw * sizeof(void *));
759 a->writer_nums = para_malloc(nw * sizeof(int));
760 a->num_writers = 0;
761 }
762 for (i = 0; i < conf.writer_given; i++) {
763 void *wconf;
764 int writer_num;
765 ret = parse_stream_command(conf.writer_arg[i], &cmd);
766 if (ret < 0)
767 goto out;
768 a = &afi[ret];
769 nw = a->num_writers;
770 wconf = check_writer_arg(cmd, &writer_num);
771 if (!wconf) {
772 ret = writer_num;
773 goto out;
774 }
775 a->writer_nums[nw] = writer_num;
776 a->writer_conf[nw] = wconf;
777 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
778 nw, writer_names[writer_num]);
779 a->num_writers++;
780 }
781 ret = 1;
782 out:
783 return ret;
784 }
785
786 static int parse_receiver_args(void)
787 {
788 int i, ret, receiver_num;
789 char *cmd = NULL;
790 struct audio_format_info *a;
791
792 for (i = conf.receiver_given - 1; i >= 0; i--) {
793 char *arg = conf.receiver_arg[i];
794 char *recv_arg = strchr(arg, ':');
795 ret = -E_MISSING_COLON;
796 if (!recv_arg)
797 goto out;
798 *recv_arg = '\0';
799 recv_arg++;
800 ret = get_audio_format_num(arg);
801 if (ret < 0)
802 goto out;
803 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
804 if (!afi[ret].receiver_conf) {
805 ret = -E_RECV_SYNTAX;
806 goto out;
807 }
808 afi[ret].receiver = &receivers[receiver_num];
809 }
810 /* use the first available receiver with no arguments
811 * for those audio formats for which no receiver
812 * was specified
813 */
814 cmd = para_strdup(receivers[0].name);
815 FOR_EACH_AUDIO_FORMAT(i) {
816 a = &afi[i];
817 if (a->receiver_conf)
818 continue;
819 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
820 if (!a->receiver_conf)
821 return -E_RECV_SYNTAX;
822 a->receiver = &receivers[receiver_num];
823 }
824 ret = 1;
825 out:
826 free(cmd);
827 return ret;
828 }
829
830 static int init_default_filters(void)
831 {
832 int i, ret = 1;
833
834 FOR_EACH_AUDIO_FORMAT(i) {
835 struct audio_format_info *a = &afi[i];
836 char *tmp;
837 int j;
838
839 if (a->num_filters)
840 continue; /* no default -- nothing to to */
841 /* add "dec" to audio format name */
842 tmp = make_message("%sdec", audio_formats[i]);
843 for (j = 0; filters[j].name; j++)
844 if (!strcmp(tmp, filters[j].name))
845 break;
846 free(tmp);
847 ret = -E_UNSUPPORTED_FILTER;
848 if (!filters[j].name)
849 goto out;
850 tmp = para_strdup(filters[j].name);
851 ret = add_filter(i, tmp);
852 free(tmp);
853 if (ret < 0)
854 goto out;
855 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
856 filters[j].name);
857 }
858 out:
859 return ret;
860 }
861
862 static int parse_filter_args(void)
863 {
864 int i, ret, nf;
865
866 nf = PARA_MAX(1U, conf.filter_given);
867 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
868 FOR_EACH_AUDIO_FORMAT(i) {
869 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
870 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
871 }
872 if (!conf.no_default_filters_given)
873 return init_default_filters();
874 for (i = 0; i < conf.filter_given; i++) {
875 char *arg = conf.filter_arg[i];
876 char *filter_name = strchr(arg, ':');
877 ret = -E_MISSING_COLON;
878 if (!filter_name)
879 goto out;
880 *filter_name = '\0';
881 filter_name++;
882 ret = get_audio_format_num(arg);
883 if (ret < 0)
884 goto out;
885 ret = add_filter(ret, filter_name);
886 if (ret < 0)
887 goto out;
888 }
889 ret = init_default_filters(); /* use default values for the rest */
890 out:
891 return ret;
892 }
893
894 static int parse_stream_args(void)
895 {
896 int ret;
897
898 ret = parse_receiver_args();
899 if (ret < 0)
900 return ret;
901 ret = parse_filter_args();
902 if (ret < 0)
903 return ret;
904 ret = parse_writer_args();
905 if (ret < 0)
906 return ret;
907 return 1;
908 }
909
910 /* does not unlink socket on errors */
911 static int audiod_get_socket(void)
912 {
913 struct sockaddr_un unix_addr;
914 int ret, fd;
915
916 if (conf.socket_given)
917 socket_name = para_strdup(conf.socket_arg);
918 else {
919 char *hn = para_hostname();
920 socket_name = make_message("/var/paraslash/audiod_socket.%s",
921 hn);
922 free(hn);
923 }
924 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
925 if (conf.force_given)
926 unlink(socket_name);
927 ret = create_local_socket(socket_name, &unix_addr,
928 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
929 if (ret < 0)
930 goto err;
931 fd = ret;
932 if (listen(fd , 5) < 0) {
933 ret = -ERRNO_TO_PARA_ERROR(errno);
934 goto err;
935 }
936 ret = mark_fd_nonblocking(fd);
937 if (ret < 0)
938 goto err;
939 return fd;
940 err:
941 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
942 exit(EXIT_FAILURE);
943 }
944
945 static void signal_pre_select(struct sched *s, struct task *t)
946 {
947 struct signal_task *st = container_of(t, struct signal_task, task);
948 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
949 }
950
951 static void signal_post_select(struct sched *s, struct task *t)
952 {
953 struct signal_task *st = container_of(t, struct signal_task, task);
954
955 if (!FD_ISSET(st->fd, &s->rfds))
956 return;
957
958 st->signum = para_next_signal();
959 switch (st->signum) {
960 case SIGINT:
961 case SIGTERM:
962 case SIGHUP:
963 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
964 clean_exit(EXIT_FAILURE, "caught deadly signal");
965 }
966 }
967
968 static void signal_setup_default(struct signal_task *st)
969 {
970 st->task.pre_select = signal_pre_select;
971 st->task.post_select = signal_post_select;
972 sprintf(st->task.status, "signal task");
973 }
974
975 static void command_pre_select(struct sched *s, struct task *t)
976 {
977 struct command_task *ct = container_of(t, struct command_task, task);
978 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
979 }
980
981 static void command_post_select(struct sched *s, struct task *t)
982 {
983 int ret;
984 struct command_task *ct = container_of(t, struct command_task, task);
985 static struct timeval last_status_dump;
986 struct timeval tmp, delay = {0, 500 * 1000};
987
988 tv_add(&last_status_dump, &delay, &tmp);
989 if (tv_diff(&tmp, now, NULL) < 0) {
990 audiod_status_dump();
991 last_status_dump = *now;
992 }
993
994 if (!FD_ISSET(ct->fd, &s->rfds))
995 return;
996 ret = handle_connect(ct->fd);
997 if (ret < 0)
998 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
999 }
1000
1001 static void init_command_task(struct command_task *ct)
1002 {
1003 ct->task.pre_select = command_pre_select;
1004 ct->task.post_select = command_post_select;
1005 ct->task.error = 0;
1006 ct->fd = audiod_get_socket(); /* doesn't return on errors */
1007 sprintf(ct->task.status, "command task");
1008 }
1009
1010 static void close_stat_pipe(void)
1011 {
1012 if (!stat_task->ct)
1013 return;
1014 client_close(stat_task->ct);
1015 stat_task->ct = NULL;
1016 clear_and_dump_items();
1017 stat_task->length_seconds = 0;
1018 stat_task->offset_seconds = 0;
1019 stat_task->vss_status = 0;
1020 stat_task->current_audio_format_num = -1;
1021 audiod_status_dump();
1022 }
1023
1024 /**
1025 * close the connection to para_server and exit
1026 *
1027 * \param status the exit status which is passed to exit(3)
1028 * \param msg the log message
1029 *
1030 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1031 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1032 * EXIT_FAILURE.
1033 *
1034 * \sa exit(3)
1035 */
1036 void __noreturn clean_exit(int status, const char *msg)
1037 {
1038 PARA_EMERG_LOG("%s\n", msg);
1039 if (socket_name)
1040 unlink(socket_name);
1041 close_stat_pipe();
1042 exit(status);
1043 }
1044
1045 /* avoid busy loop if server is down */
1046 static void set_stat_task_restart_barrier(unsigned seconds)
1047 {
1048 struct timeval delay = {seconds, 0};
1049 tv_add(now, &delay, &stat_task->restart_barrier);
1050 }
1051
1052 static bool try_to_close_slot(int slot_num)
1053 {
1054 struct slot_info *s = &slot[slot_num];
1055 struct audio_format_info *a = afi + s->format;
1056 int i;
1057
1058 if (s->format < 0)
1059 return false;
1060 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
1061 return false;
1062 for (i = 0; i < a->num_filters; i++)
1063 if (s->fns && s->fns[i].task.error != -E_TASK_UNREGISTERED)
1064 return false;
1065 if (a->num_writers > 0) {
1066 for (i = 0; i < a->num_writers; i++)
1067 if (s->wns && s->wns[i].task.error != -E_TASK_UNREGISTERED)
1068 return false;
1069 } else {
1070 if (s->wns && s->wns[0].task.error != -E_TASK_UNREGISTERED)
1071 return false;
1072 }
1073 PARA_INFO_LOG("closing slot %d\n", slot_num);
1074 close_writers(s);
1075 close_filters(s);
1076 close_receiver(slot_num);
1077 clear_slot(slot_num);
1078 return true;
1079 }
1080
1081 /*
1082 * Check if any receivers/filters/writers need to be started and do so if
1083 * necessary.
1084 */
1085 static void start_stop_decoders(struct sched *s)
1086 {
1087 int i, ret;
1088 struct slot_info *sl;
1089 struct audio_format_info *a;
1090
1091 FOR_EACH_SLOT(i)
1092 if (try_to_close_slot(i))
1093 sched_min_delay(s);
1094 // if (audiod_status != AUDIOD_ON ||
1095 // !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1096 // return kill_all_decoders(-E_NOT_PLAYING);
1097 ret = open_current_receiver(s);
1098 if (ret < 0)
1099 return;
1100 sl = slot + ret;
1101 a = afi + sl->format;
1102 if (a->num_filters)
1103 open_filters(sl);
1104 open_writers(sl);
1105 activate_grab_clients();
1106 btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1107 sched_min_delay(s);
1108 }
1109
1110 /* restart the client task if necessary */
1111 static void status_pre_select(struct sched *s, struct task *t)
1112 {
1113 struct status_task *st = container_of(t, struct status_task, task);
1114
1115 if (audiod_status == AUDIOD_OFF) {
1116 if (!st->ct)
1117 goto out;
1118 if (st->ct->task.error >= 0) {
1119 st->ct->task.error = -E_AUDIOD_OFF;
1120 goto out;
1121 }
1122 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1123 goto out;
1124 close_stat_pipe();
1125 st->clock_diff_count = conf.clock_diff_count_arg;
1126 goto out;
1127 }
1128 if (st->ct) {
1129 int ret;
1130 if (st->ct->task.error < 0) {
1131 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1132 goto out;
1133 close_stat_pipe();
1134 goto out;
1135 }
1136 if (st->ct->status != CL_RECEIVING)
1137 goto out;
1138 ret = for_each_stat_item(st->ct->buf, st->ct->loaded,
1139 update_item);
1140 if (ret < 0) {
1141 st->ct->task.error = ret;
1142 goto out;
1143 }
1144 if (st->ct->loaded != ret) {
1145 st->last_status_read = *now;
1146 st->ct->loaded = ret;
1147 } else {
1148 struct timeval diff;
1149 tv_diff(now, &st->last_status_read, &diff);
1150 if (diff.tv_sec > 61)
1151 st->ct->task.error = -E_STATUS_TIMEOUT;
1152 }
1153 goto out;
1154 }
1155 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1156 goto out;
1157 if (st->clock_diff_count) { /* get status only one time */
1158 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1159 int argc = 5;
1160 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1161 st->clock_diff_count--;
1162 client_open(argc, argv, &st->ct, NULL);
1163 set_stat_task_restart_barrier(2);
1164 sched_min_delay(s);
1165
1166 } else {
1167 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1168 int argc = 4;
1169 client_open(argc, argv, &st->ct, NULL);
1170 set_stat_task_restart_barrier(5);
1171 sched_min_delay(s);
1172 }
1173 free(stat_item_values[SI_BASENAME]);
1174 stat_item_values[SI_BASENAME] = para_strdup(
1175 "no connection to para_server");
1176 stat_client_write_item(SI_BASENAME);
1177 st->last_status_read = *now;
1178 out:
1179 start_stop_decoders(s);
1180 }
1181
1182 static void init_status_task(struct status_task *st)
1183 {
1184 memset(st, 0, sizeof(struct status_task));
1185 st->task.pre_select = status_pre_select;
1186 st->sa_time_diff_sign = 1;
1187 st->clock_diff_count = conf.clock_diff_count_arg;
1188 st->current_audio_format_num = -1;
1189 sprintf(st->task.status, "status task");
1190 }
1191
1192 static void set_initial_status(void)
1193 {
1194 audiod_status = AUDIOD_ON;
1195 if (!conf.mode_given)
1196 return;
1197 if (!strcmp(conf.mode_arg, "sb")) {
1198 audiod_status = AUDIOD_STANDBY;
1199 return;
1200 }
1201 if (!strcmp(conf.mode_arg, "off")) {
1202 audiod_status = AUDIOD_OFF;
1203 return;
1204 }
1205 if (strcmp(conf.mode_arg, "on"))
1206 PARA_WARNING_LOG("invalid mode\n");
1207 }
1208
1209 __noreturn static void print_help_and_die(void)
1210 {
1211 int d = conf.detailed_help_given;
1212 const char **p = d? audiod_args_info_detailed_help
1213 : audiod_args_info_help;
1214
1215 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1216 AUDIOD_CMDLINE_PARSER_VERSION);
1217 printf_or_die("%s\n\n", audiod_args_info_usage);
1218 for (; *p; p++)
1219 printf_or_die("%s\n", *p);
1220 print_receiver_helps(d);
1221 print_filter_helps(d);
1222 print_writer_helps(d);
1223 exit(0);
1224 }
1225
1226 static void init_colors_or_die(void)
1227 {
1228 int ret, i;
1229
1230 if (!want_colors())
1231 return;
1232 daemon_set_default_log_colors();
1233 daemon_set_flag(DF_COLOR_LOG);
1234 for (i = 0; i < conf.log_color_given; i++) {
1235 ret = daemon_set_log_color(conf.log_color_arg[i]);
1236 if (ret < 0)
1237 exit(EXIT_FAILURE);
1238 }
1239 }
1240
1241 /**
1242 * the main function of para_audiod
1243 *
1244 * \param argc usual argument count
1245 * \param argv usual argument vector
1246 *
1247 * \return EXIT_SUCCESS or EXIT_FAILURE
1248 *
1249 * \sa para_audiod(1)
1250 * */
1251 int main(int argc, char *argv[])
1252 {
1253 int ret, i;
1254 static struct sched s;
1255 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1256 struct audiod_cmdline_parser_params params = {
1257 .override = 0,
1258 .initialize = 1,
1259 .check_required = 0,
1260 .check_ambiguity = 0,
1261 .print_errors = 1
1262 };
1263
1264 valid_fd_012();
1265 if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1266 exit(EXIT_FAILURE);
1267 HANDLE_VERSION_FLAG("audiod", conf);
1268 /* init receivers/filters/writers early to make help work */
1269 recv_init();
1270 filter_init();
1271 writer_init();
1272 if (conf.help_given || conf.detailed_help_given)
1273 print_help_and_die();
1274 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1275 parse_config_or_die();
1276 init_colors_or_die();
1277 init_random_seed_or_die();
1278 daemon_set_flag(DF_LOG_TIME);
1279 daemon_set_flag(DF_LOG_HOSTNAME);
1280 daemon_set_flag(DF_LOG_LL);
1281 if (conf.log_timing_given)
1282 daemon_set_flag(DF_LOG_TIMING);
1283 if (conf.logfile_given) {
1284 daemon_set_logfile(conf.logfile_arg);
1285 daemon_open_log_or_die();
1286 }
1287 ret = parse_stream_args();
1288 if (ret < 0) {
1289 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1290 exit(EXIT_FAILURE);
1291 }
1292 log_welcome("para_audiod");
1293 server_uptime(UPTIME_SET);
1294 set_initial_status();
1295 FOR_EACH_SLOT(i)
1296 clear_slot(i);
1297 setup_signal_handling();
1298 signal_setup_default(sig_task);
1299
1300 init_status_task(stat_task);
1301 init_command_task(cmd_task);
1302
1303 if (conf.daemon_given)
1304 daemonize();
1305
1306 register_task(&sig_task->task);
1307 register_task(&cmd_task->task);
1308 register_task(&stat_task->task);
1309 s.default_timeout.tv_sec = 2;
1310 s.default_timeout.tv_usec = 999 * 1000;
1311 ret = schedule(&s);
1312
1313 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1314 return EXIT_FAILURE;
1315 }