audiod: Move get_play_time_slot_num() to audiod.c.
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file audiod.c The paraslash's audio daemon. */
8
9 #include <netinet/in.h>
10 #include <sys/socket.h>
11 #include <regex.h>
12 #include <sys/types.h>
13 #include <arpa/inet.h>
14 #include <sys/un.h>
15 #include <netdb.h>
16 #include <signal.h>
17
18 #include "para.h"
19 #include "error.h"
20 #include "crypt.h"
21 #include "audiod.cmdline.h"
22 #include "list.h"
23 #include "sched.h"
24 #include "ggo.h"
25 #include "buffer_tree.h"
26 #include "recv.h"
27 #include "filter.h"
28 #include "grab_client.h"
29 #include "client.cmdline.h"
30 #include "client.h"
31 #include "audiod.h"
32 #include "net.h"
33 #include "daemon.h"
34 #include "string.h"
35 #include "fd.h"
36 #include "write.h"
37 #include "write_common.h"
38 #include "signal.h"
39 #include "version.h"
40
41 __printf_2_3 void (*para_log)(int, const char*, ...) = daemon_log;
42 /** define the array of error lists needed by para_audiod */
43 INIT_AUDIOD_ERRLISTS;
44 /** define the array containing all supported audio formats */
45 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
46
47 DEFINE_RECEIVER_ARRAY;
48
49 /** Defines how audiod handles one supported audio format. */
50 struct audio_format_info {
51 /** pointer to the receiver for this audio format */
52 struct receiver *receiver;
53 /** the receiver configuration */
54 void *receiver_conf;
55 /** the number of filters that should be activated for this audio format */
56 unsigned int num_filters;
57 /** Array of filter numbers to be activated. */
58 unsigned *filter_nums;
59 /** Pointer to the array of filter configurations. */
60 void **filter_conf;
61 /** the number of filters that should be activated for this audio format */
62 unsigned int num_writers;
63 /** Array of writer numbers to be activated. */
64 int *writer_nums;
65 /** pointer to the array of writer configurations */
66 void **writer_conf;
67 /** do not start receiver/filters/writer before this time */
68 struct timeval restart_barrier;
69 };
70
71 /**
72 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
73 * be associated with a receiver/filter/writer triple. This array holds all
74 * information on the status of these slots.
75 *
76 * \sa struct slot_info
77 * */
78 struct slot_info slot[MAX_STREAM_SLOTS];
79
80 /** The vss status flags audiod is interested in. */
81 enum vss_status_flags {
82 /** Whether the 'N' flag is set. */
83 VSS_STATUS_FLAG_NEXT = 1,
84 /** The 'P' flag is set. */
85 VSS_STATUS_FLAG_PLAYING = 2,
86 };
87
88 /**
89 * The scheduler instance of para_audiod.
90 *
91 * This is needed also in audiod_command.c (for the tasks command), so it can
92 * not be made static.
93 */
94 struct sched sched = {.max_fileno = 0};
95
96 /* The task for obtaining para_server's status (para_client stat). */
97 struct status_task {
98 /** The associated task structure of audiod. */
99 struct task *task;
100 /** Client data associated with the stat task. */
101 struct client_task *ct;
102 /** Do not restart client command until this time. */
103 struct timeval restart_barrier;
104 /** Last time we received status data from para_server. */
105 struct timeval last_status_read;
106 size_t min_iqs;
107 /** The offset value announced by para_server. */
108 int offset_seconds;
109 /** The length of the current audio file as announced by para_server. */
110 int length_seconds;
111 /** The start of the current stream from the view of para_server. */
112 struct timeval server_stream_start;
113 /** The average time deviation between para_server and para_audiod. */
114 struct timeval sa_time_diff;
115 /** Whether client time is ahead of server time. */
116 int sa_time_diff_sign;
117 /** The 'P' and the 'N' flags as announced by para_server. */
118 enum vss_status_flags vss_status;
119 /** Number of times the clock difference is to be checked. */
120 unsigned clock_diff_count;
121 /** When to start the next check for clock difference. */
122 struct timeval clock_diff_barrier;
123 /** Number of the audio format as announced by para_server. */
124 int current_audio_format_num;
125 /* The status task btrn is the child of the client task. */
126 struct btr_node *btrn;
127 };
128
129 /** The array of status items sent by para_server. */
130 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
131
132 /**
133 * the current mode of operation of which can be changed by the on/off/cycle
134 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
135 */
136 int audiod_status = AUDIOD_ON;
137
138 /**
139 * the gengetopt args_info struct that holds information on all command line
140 * arguments
141 */
142 struct audiod_args_info conf;
143
144 static char *socket_name;
145 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
146
147 static struct signal_task *signal_task;
148
149 static struct status_task status_task_struct;
150
151 /**
152 * the task that calls the status command of para_server
153 *
154 * \sa struct status_task
155 */
156 static struct status_task *stat_task = &status_task_struct;
157
158 /*
159 * The task for handling audiod commands.
160 *
161 * We need two listening sockets for backward compability: on Linux systems
162 * fd[0] is an abstract socket (more precisely, a socket bound to an address in
163 * the abstract namespace), and fd[1] is the usual pathname socket. On other
164 * systems, fd[0] is negative, and only the pathname socket is used.
165 *
166 * For 0.5.x we accept connections on both sockets to make sure that old
167 * para_audioc versions can still connect. New versions use only the abstract
168 * socket. Hence after v0.6.0 we can go back to a single socket, either an
169 * abstract one (Linux) or a pathname socket (all other systems).
170 */
171 struct command_task {
172 /** The local listening sockets. */
173 int fd[2];
174 /** the associated task structure */
175 struct task *task;
176 };
177
178 /** iterate over all supported audio formats */
179 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
180
181 /**
182 * Get the audio format number.
183 *
184 * \param name The name of the audio format.
185 *
186 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
187 * \a name is not a supported audio format.
188 */
189 static int get_audio_format_num(const char *name)
190 {
191 int i;
192
193 while (para_isspace(*name))
194 name++;
195 FOR_EACH_AUDIO_FORMAT(i)
196 if (!strcmp(name, audio_formats[i]))
197 return i;
198 return -E_UNSUPPORTED_AUDIO_FORMAT;
199 }
200
201 static int get_matching_audio_format_nums(const char *re)
202 {
203 int i, ret;
204 regex_t preg;
205
206 ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
207 if (ret < 0)
208 return ret;
209 ret = 0;
210 FOR_EACH_AUDIO_FORMAT(i)
211 if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
212 ret |= (1 << i);
213 regfree(&preg);
214 return ret;
215 }
216
217 static int get_play_time_slot_num(void)
218 {
219 int i, oldest_slot = -1;
220 struct timeval oldest_wstime = {0, 0};
221
222 FOR_EACH_SLOT(i) {
223 struct slot_info *s = &slot[i];
224 struct timeval wstime;
225 if (!s->wns || !s->wns[0].btrn)
226 continue;
227 btr_get_node_start(s->wns[0].btrn, &wstime);
228 if (oldest_slot >= 0 && tv_diff(&wstime, &oldest_wstime, NULL) > 0)
229 continue;
230 oldest_wstime = wstime;
231 oldest_slot = i;
232 }
233 return oldest_slot;
234 }
235
236 /**
237 * Compute the play time based on information of the current slot.
238 *
239 * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
240 * from the status items received from para_server and the start time of the
241 * (first) writer of the current slot.
242 *
243 * It has to take into account that the stream was probably not started at
244 * the beginning of the file, that the clock between the server and the client
245 * host may differ and that playback of the stream was delayed, e.g. because
246 * the prebuffer filter is used in the filter configuration.
247 *
248 * If no writer is active, for example because para_audiod runs in standby
249 * mode, an approximation based only on the status items is computed and the
250 * returned string is prefixed with "~".
251 *
252 * \return A string that must be freed by the caller.
253 */
254 char *get_time_string(void)
255 {
256 int ret, seconds = 0, length;
257 struct timeval *tmp, sum, sss, /* server stream start */
258 rstime, /* receiver start time */
259 wstime, /* writer start time */
260 wtime, /* now - writer start */
261 rskip; /* receiver start - sss */
262 int slot_num = get_play_time_slot_num();
263 struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
264 char *msg;
265
266 if (audiod_status == AUDIOD_OFF)
267 goto empty;
268 if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
269 if (stat_task->length_seconds) /* paused */
270 return NULL;
271 goto empty; /* stopped */
272 }
273 if (audiod_status == AUDIOD_ON && !s)
274 goto empty;
275 /*
276 * Valid status items and playing, set length and tmp to the stream
277 * start. We use the slot info and fall back to the info from current
278 * status items if no slot info is available.
279 */
280 length = stat_task->length_seconds;
281 tmp = &stat_task->server_stream_start;
282 if (s && s->wns && s->wns[0].btrn) { /* writer active in this slot */
283 btr_get_node_start(s->wns[0].btrn, &wstime);
284 if (wstime.tv_sec != 0) { /* writer wrote something */
285 if (s->server_stream_start.tv_sec == 0) {
286 /* copy status info to slot */
287 s->server_stream_start = stat_task->server_stream_start;
288 s->offset_seconds = stat_task->offset_seconds;
289 s->seconds_total = stat_task->length_seconds;
290 }
291 length = s->seconds_total;
292 tmp = &s->server_stream_start;
293 }
294 }
295 if (stat_task->sa_time_diff_sign > 0)
296 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
297 else
298 tv_add(tmp, &stat_task->sa_time_diff, &sss);
299 if (!s || !s->wns || !s->wns[0].btrn) {
300 struct timeval diff;
301 tv_diff(now, &sss, &diff);
302 seconds = diff.tv_sec + stat_task->offset_seconds;
303 goto out;
304 }
305 tv_diff(now, &wstime, &wtime);
306 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
307 seconds = s->offset_seconds;
308 if (s->receiver_node->btrn) {
309 btr_get_node_start(s->receiver_node->btrn, &rstime);
310 ret = tv_diff(&rstime, &sss, &rskip);
311 if (ret > 0) { /* audiod was started in the middle of the stream */
312 tv_add(&wtime, &rskip, &sum);
313 seconds += sum.tv_sec;
314 } else
315 seconds += wtime.tv_sec;
316 } else
317 seconds += wtime.tv_sec;
318 out:
319 seconds = PARA_MIN(seconds, length);
320 seconds = PARA_MAX(seconds, 0);
321 msg = make_message(
322 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
323 s? "" : "~",
324 seconds / 60,
325 seconds % 60,
326 (length - seconds) / 60,
327 (length - seconds) % 60,
328 length? (seconds * 100 + length / 2) / length : 0,
329 length / 60,
330 length % 60
331 );
332 //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
333 return msg;
334 empty:
335 return para_strdup(NULL);
336 }
337
338 static void parse_config_or_die(void)
339 {
340 int ret;
341 char *config_file;
342 struct audiod_cmdline_parser_params params = {
343 .override = 0,
344 .initialize = 0,
345 .check_required = 1,
346 .check_ambiguity = 0,
347 .print_errors = 1
348 };
349
350 if (conf.config_file_given)
351 config_file = para_strdup(conf.config_file_arg);
352 else {
353 char *home = para_homedir();
354 config_file = make_message("%s/.paraslash/audiod.conf", home);
355 free(home);
356 }
357 ret = file_exists(config_file);
358 if (conf.config_file_given && !ret) {
359 PARA_EMERG_LOG("can not read config file %s\n", config_file);
360 goto err;
361 }
362 if (ret) {
363 audiod_cmdline_parser_config_file(config_file, &conf, &params);
364 daemon_set_loglevel(conf.loglevel_arg);
365 }
366 free(config_file);
367 return;
368 err:
369 free(config_file);
370 exit(EXIT_FAILURE);
371 }
372
373 static void setup_signal_handling(void)
374 {
375 signal_task = signal_init_or_die();
376 para_install_sighandler(SIGINT);
377 para_install_sighandler(SIGTERM);
378 para_install_sighandler(SIGHUP);
379 para_sigaction(SIGPIPE, SIG_IGN);
380 }
381
382 static void clear_slot(int slot_num)
383 {
384 struct slot_info *s = &slot[slot_num];
385
386 PARA_INFO_LOG("clearing slot %d\n", slot_num);
387 memset(s, 0, sizeof(struct slot_info));
388 s->format = -1;
389 }
390
391 static void close_receiver(int slot_num)
392 {
393 struct slot_info *s = &slot[slot_num];
394 struct audio_format_info *a;
395
396 if (s->format < 0 || !s->receiver_node)
397 return;
398 a = &afi[s->format];
399 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
400 audio_formats[s->format], slot_num);
401 a->receiver->close(s->receiver_node);
402 btr_remove_node(&s->receiver_node->btrn);
403 task_reap(&s->receiver_node->task);
404 free(s->receiver_node);
405 s->receiver_node = NULL;
406 stat_task->current_audio_format_num = -1;
407 tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
408 &a->restart_barrier);
409 }
410
411 static void writer_cleanup(struct writer_node *wn)
412 {
413 struct writer *w;
414
415 if (!wn)
416 return;
417 w = writers + wn->writer_num;
418 PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
419 w->close(wn);
420 btr_remove_node(&wn->btrn);
421 task_reap(&wn->task);
422 }
423
424 static void close_writers(struct slot_info *s)
425 {
426 struct audio_format_info *a;
427 int i;
428
429 if (s->format < 0)
430 return;
431 assert(s->wns);
432 a = afi + s->format;
433 if (a->num_writers == 0)
434 writer_cleanup(s->wns);
435 else {
436 for (i = 0; i < a->num_writers; i++)
437 writer_cleanup(s->wns + i);
438 }
439 free(s->wns);
440 s->wns = NULL;
441 }
442
443 static void close_filters(struct slot_info *s)
444 {
445 int i;
446 struct audio_format_info *a = afi + s->format;
447 if (a->num_filters == 0)
448 return;
449 for (i = a->num_filters - 1; i >= 0; i--) {
450 struct filter_node *fn = s->fns + i;
451 struct filter *f;
452
453 if (!fn)
454 continue;
455 f = filters + fn->filter_num;
456 if (f->close)
457 f->close(fn);
458 btr_remove_node(&fn->btrn);
459 task_reap(&fn->task);
460 }
461 free(s->fns);
462 s->fns = NULL;
463 }
464
465 static void notify_receivers(int error)
466 {
467 int i;
468
469 FOR_EACH_SLOT(i) {
470 struct slot_info *s = slot + i;
471 if (s->format < 0)
472 continue;
473 if (!s->receiver_node)
474 continue;
475 task_notify(s->receiver_node->task, error);
476 }
477 }
478
479 static int get_empty_slot(void)
480 {
481 int i;
482 struct slot_info *s;
483
484 FOR_EACH_SLOT(i) {
485 s = &slot[i];
486 if (s->format < 0) {
487 clear_slot(i);
488 return i;
489 }
490 if (s->wns || s->receiver_node || s->fns)
491 continue;
492 clear_slot(i);
493 return i;
494 }
495 return -E_NO_MORE_SLOTS;
496 }
497
498 static void open_filters(struct slot_info *s)
499 {
500 struct audio_format_info *a = afi + s->format;
501 struct filter_node *fn;
502 int nf = a->num_filters;
503 struct btr_node *parent;
504 int i;
505
506 if (nf == 0)
507 return;
508 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
509 assert(s->fns == NULL);
510 s->fns = para_calloc(nf * sizeof(struct filter_node));
511 parent = s->receiver_node->btrn;
512 for (i = 0; i < nf; i++) {
513 char buf[20];
514 struct filter *f = filters + a->filter_nums[i];
515 fn = s->fns + i;
516 fn->filter_num = a->filter_nums[i];
517 fn->conf = a->filter_conf[i];
518 fn->btrn = btr_new_node(&(struct btr_node_description)
519 EMBRACE(.name = f->name, .parent = parent,
520 .handler = f->execute, .context = fn));
521
522 f->open(fn);
523 sprintf(buf, "%s (slot %d)", f->name, (int)(s - slot));
524 fn->task = task_register(&(struct task_info) {
525 .name = buf,
526 .pre_select = f->pre_select,
527 .post_select = f->post_select,
528 .context = fn,
529 }, &sched);
530 parent = fn->btrn;
531 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
532 audio_formats[s->format], i, nf, f->name, (int)(s - slot));
533 }
534 }
535
536 static void open_writers(struct slot_info *s)
537 {
538 int i;
539 struct audio_format_info *a = afi + s->format;
540 struct writer_node *wn;
541 struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
542
543 assert(s->wns == NULL);
544 s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
545 * sizeof(struct writer_node));
546 for (i = 0; i < a->num_writers; i++) {
547 wn = s->wns + i;
548 wn->conf = a->writer_conf[i];
549 wn->writer_num = a->writer_nums[i];
550 register_writer_node(wn, parent, &sched);
551 PARA_NOTICE_LOG("%s writer started in slot %d\n",
552 writer_names[a->writer_nums[i]], (int)(s - slot));
553 }
554 }
555
556 /* returns slot num on success */
557 static int open_receiver(int format)
558 {
559 struct audio_format_info *a = &afi[format];
560 struct slot_info *s;
561 int ret, slot_num;
562 struct receiver *r = a->receiver;
563 struct receiver_node *rn;
564
565 tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
566 ret = get_empty_slot();
567 if (ret < 0)
568 return ret;
569 slot_num = ret;
570 rn = para_calloc(sizeof(*rn));
571 rn->receiver = r;
572 rn->conf = a->receiver_conf;
573 rn->btrn = btr_new_node(&(struct btr_node_description)
574 EMBRACE(.name = r->name, .context = rn));
575 ret = r->open(rn);
576 if (ret < 0) {
577 btr_remove_node(&rn->btrn);
578 free(rn);
579 return ret;
580 }
581 s = &slot[slot_num];
582 s->format = format;
583 s->receiver_node = rn;
584 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
585 audio_formats[format], r->name, slot_num);
586 rn->task = task_register(&(struct task_info) {
587 .name = r->name,
588 .pre_select = r->pre_select,
589 .post_select = r->post_select,
590 .context = rn,
591 }, &sched);
592 return slot_num;
593 }
594
595 static bool receiver_running(void)
596 {
597 int i;
598 long unsigned ss1 = stat_task->server_stream_start.tv_sec;
599
600 FOR_EACH_SLOT(i) {
601 struct slot_info *s = &slot[i];
602 long unsigned ss2 = s->server_stream_start.tv_sec;
603
604 if (!s->receiver_node)
605 continue;
606 if (task_status(s->receiver_node->task) >= 0)
607 return true;
608 if (ss1 == ss2)
609 return true;
610 }
611 return false;
612 }
613
614 /**
615 * Return the root node of the current buffer tree.
616 *
617 * This is only used for stream grabbing.
618 *
619 * \return \p NULL if no slot is currently active. If more than one buffer tree
620 * exists, the node corresponding to the most recently started receiver is
621 * returned.
622 */
623 struct btr_node *audiod_get_btr_root(void)
624 {
625 int i, newest_slot = -1;
626 struct timeval newest_rstime = {0, 0};
627
628 FOR_EACH_SLOT(i) {
629 struct slot_info *s = &slot[i];
630 struct timeval rstime;
631 if (!s->receiver_node)
632 continue;
633 if (task_status(s->receiver_node->task) < 0)
634 continue;
635 btr_get_node_start(s->receiver_node->btrn, &rstime);
636 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
637 continue;
638 newest_rstime = rstime;
639 newest_slot = i;
640 }
641 if (newest_slot == -1)
642 return NULL;
643 return slot[newest_slot].receiver_node->btrn;
644 }
645
646 /* whether a new instance of a decoder should be started. */
647 static bool must_start_decoder(void)
648 {
649 int cafn = stat_task->current_audio_format_num;
650 unsigned vs = stat_task->vss_status;
651
652 if (audiod_status != AUDIOD_ON)
653 return false;
654 if (cafn < 0)
655 return false;
656 if (!stat_task->ct)
657 return false;
658 if (vs & VSS_STATUS_FLAG_NEXT)
659 return false;
660 if (!(vs & VSS_STATUS_FLAG_PLAYING))
661 return false;
662 if (receiver_running())
663 return false;
664 if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
665 return false;
666 return true;
667 }
668
669 static void compute_time_diff(const struct timeval *status_time)
670 {
671 struct timeval tmp, diff;
672 static unsigned count;
673 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
674 const struct timeval max_deviation = {0, 500 * 1000};
675 const int time_smooth = 5;
676
677 sign = tv_diff(status_time, now, &diff);
678 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
679 // sign, sa_time_diff_sign);
680 if (!count) {
681 sa_time_diff_sign = sign;
682 stat_task->sa_time_diff = diff;
683 count++;
684 goto out;
685 }
686 if (count > 5) {
687 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
688 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
689 PARA_WARNING_LOG("time diff jump: %lims\n",
690 s * tv2ms(&tmp));
691 }
692 count++;
693 sa_time_diff_sign = tv_convex_combination(
694 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
695 count > 10? sign : sign * time_smooth, &diff,
696 &tmp);
697 stat_task->sa_time_diff = tmp;
698 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
699 sign < 0? "-" : "+",
700 tv2ms(&diff),
701 sa_time_diff_sign < 0? "-" : "+",
702 tv2ms(&stat_task->sa_time_diff)
703 );
704 out:
705 stat_task->sa_time_diff_sign = sa_time_diff_sign;
706 }
707
708 static int update_item(int itemnum, char *buf)
709 {
710 long unsigned sec, usec;
711
712 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
713 return 1;
714 free(stat_item_values[itemnum]);
715 stat_item_values[itemnum] = para_strdup(buf);
716 stat_client_write_item(itemnum);
717 switch (itemnum) {
718 case SI_STATUS_FLAGS:
719 stat_task->vss_status = 0;
720 if (strchr(buf, 'N'))
721 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
722 if (strchr(buf, 'P'))
723 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
724 break;
725 case SI_OFFSET:
726 stat_task->offset_seconds = atoi(buf);
727 break;
728 case SI_SECONDS_TOTAL:
729 stat_task->length_seconds = atoi(buf);
730 break;
731 case SI_STREAM_START:
732 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
733 stat_task->server_stream_start.tv_sec = sec;
734 stat_task->server_stream_start.tv_usec = usec;
735 }
736 break;
737 case SI_CURRENT_TIME:
738 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
739 struct timeval tv = {sec, usec};
740 compute_time_diff(&tv);
741 }
742 break;
743 case SI_FORMAT:
744 stat_task->current_audio_format_num
745 = get_audio_format_num(buf);
746 }
747 return 1;
748 }
749
750 static int parse_stream_command(const char *txt, char **cmd)
751 {
752 int ret, len;
753 char *re, *p = strchr(txt, ':');
754
755 if (!p)
756 return -E_MISSING_COLON;
757 *cmd = p + 1;
758 len = p - txt;
759 re = malloc(len + 1);
760 strncpy(re, txt, len);
761 re[len] = '\0';
762 ret = get_matching_audio_format_nums(re);
763 free(re);
764 return ret;
765 }
766
767 static int add_filter(int format, char *cmdline)
768 {
769 struct audio_format_info *a = &afi[format];
770 int filter_num, nf = a->num_filters;
771 void *cfg;
772
773 filter_num = check_filter_arg(cmdline, &cfg);
774 if (filter_num < 0)
775 return filter_num;
776 a->filter_conf = para_realloc(a->filter_conf,
777 (nf + 1) * sizeof(void *));
778 a->filter_nums = para_realloc(a->filter_nums,
779 (nf + 1) * sizeof(unsigned));
780 a->filter_nums[nf] = filter_num;
781 a->filter_conf[nf] = cfg;
782 a->num_filters++;
783 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
784 filters[filter_num].name);
785 return filter_num;
786 }
787
788 static int parse_writer_args(void)
789 {
790 int i, ret;
791 char *cmd;
792 struct audio_format_info *a;
793
794 for (i = 0; i < conf.writer_given; i++) {
795 void *wconf;
796 int j, nw, writer_num, af_mask;
797
798 ret = parse_stream_command(conf.writer_arg[i], &cmd);
799 if (ret < 0)
800 return ret;
801 af_mask = ret;
802 FOR_EACH_AUDIO_FORMAT(j) {
803 a = afi + j;
804 if ((af_mask & (1 << j)) == 0) /* no match */
805 continue;
806 wconf = check_writer_arg_or_die(cmd, &writer_num);
807 nw = a->num_writers;
808 a->writer_nums = para_realloc(a->writer_nums, (nw + 1) * sizeof(int));
809 a->writer_conf = para_realloc(a->writer_conf, (nw + 1) * sizeof(void *));
810 a->writer_nums[nw] = writer_num;
811 a->writer_conf[nw] = wconf;
812 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[j],
813 nw, writer_names[writer_num]);
814 a->num_writers++;
815 }
816 }
817 /* Use default writer for audio formats which are not yet set up. */
818 FOR_EACH_AUDIO_FORMAT(i) {
819 void *writer_conf;
820 int writer_num;
821 a = afi + i;
822 if (a->num_writers > 0)
823 continue; /* already set up */
824 writer_conf = check_writer_arg_or_die(NULL, &writer_num);
825 a->writer_nums = para_malloc(sizeof(int));
826 a->writer_nums[0] = writer_num;
827 a->writer_conf = para_malloc(sizeof(void *));
828 a->writer_conf[0] = writer_conf;
829 a->num_writers = 1;
830 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats[i],
831 writer_names[writer_num]);
832 }
833 return 1;
834 }
835
836 static int parse_receiver_args(void)
837 {
838 int i, ret, receiver_num;
839 char *cmd = NULL;
840 struct audio_format_info *a;
841
842 for (i = conf.receiver_given - 1; i >= 0; i--) {
843 char *arg;
844 int j, af_mask;
845
846 ret = parse_stream_command(conf.receiver_arg[i], &arg);
847 if (ret < 0)
848 goto out;
849 af_mask = ret;
850 FOR_EACH_AUDIO_FORMAT(j) {
851 a = afi + j;
852 if ((af_mask & (1 << j)) == 0) /* no match */
853 continue;
854 /*
855 * If multiple receivers are given for this audio format, the
856 * last one wins and we have to free the previous receiver
857 * config here. Since we are iterating backwards, the winning
858 * receiver arg is in fact the first one given.
859 */
860 if (a->receiver_conf)
861 a->receiver->free_config(a->receiver_conf);
862 a->receiver_conf = check_receiver_arg(arg, &receiver_num);
863 ret = -E_RECV_SYNTAX;
864 if (!a->receiver_conf)
865 goto out;
866 a->receiver = receivers + receiver_num;
867 }
868 }
869 /*
870 * Use the first available receiver with no arguments for those audio
871 * formats for which no receiver was specified.
872 */
873 cmd = para_strdup(receivers[0].name);
874 FOR_EACH_AUDIO_FORMAT(i) {
875 a = &afi[i];
876 if (a->receiver_conf)
877 continue;
878 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
879 if (!a->receiver_conf)
880 return -E_RECV_SYNTAX;
881 a->receiver = &receivers[receiver_num];
882 }
883 FOR_EACH_AUDIO_FORMAT(i) {
884 a = afi + i;
885 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
886 audio_formats[i], a->receiver->name);
887 }
888 ret = 1;
889 out:
890 free(cmd);
891 return ret;
892 }
893
894 static int init_default_filters(void)
895 {
896 int i, ret = 1;
897
898 FOR_EACH_AUDIO_FORMAT(i) {
899 struct audio_format_info *a = &afi[i];
900 char *tmp;
901 int j;
902
903 if (a->num_filters)
904 continue; /* no default -- nothing to to */
905 /*
906 * udp and dccp streams are fec-encoded, so add fecdec as the
907 * first filter.
908 */
909 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
910 strcmp(afi[i].receiver->name, "dccp") == 0) {
911 tmp = para_strdup("fecdec");
912 add_filter(i, tmp);
913 free(tmp);
914 if (ret < 0)
915 goto out;
916 }
917 /* add "dec" to audio format name */
918 tmp = make_message("%sdec", audio_formats[i]);
919 for (j = 0; filters[j].name; j++)
920 if (!strcmp(tmp, filters[j].name))
921 break;
922 free(tmp);
923 ret = -E_UNSUPPORTED_FILTER;
924 if (!filters[j].name)
925 goto out;
926 tmp = para_strdup(filters[j].name);
927 ret = add_filter(i, tmp);
928 free(tmp);
929 if (ret < 0)
930 goto out;
931 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
932 filters[j].name);
933 }
934 out:
935 return ret;
936 }
937
938 static int parse_filter_args(void)
939 {
940 int i, j, ret, af_mask, num_matches;
941
942 for (i = 0; i < conf.filter_given; i++) {
943 char *arg;
944 ret = parse_stream_command(conf.filter_arg[i], &arg);
945 if (ret < 0)
946 goto out;
947 af_mask = ret;
948 num_matches = 0;
949 FOR_EACH_AUDIO_FORMAT(j) {
950 if ((af_mask & (1 << j)) == 0) /* no match */
951 continue;
952 ret = add_filter(j, arg);
953 if (ret < 0)
954 goto out;
955 num_matches++;
956 }
957 if (num_matches == 0)
958 PARA_WARNING_LOG("ignoring filter spec: %s\n",
959 conf.filter_arg[i]);
960 }
961 ret = init_default_filters(); /* use default values for the rest */
962 out:
963 return ret;
964 }
965
966 static int parse_stream_args(void)
967 {
968 int ret;
969
970 ret = parse_receiver_args();
971 if (ret < 0)
972 return ret;
973 ret = parse_filter_args();
974 if (ret < 0)
975 return ret;
976 ret = parse_writer_args();
977 if (ret < 0)
978 return ret;
979 return 1;
980 }
981
982 /* does not unlink socket on errors */
983 static void init_local_sockets(struct command_task *ct)
984 {
985 if (conf.socket_given)
986 socket_name = para_strdup(conf.socket_arg);
987 else {
988 char *hn = para_hostname();
989 socket_name = make_message("/var/paraslash/audiod_socket.%s",
990 hn);
991 free(hn);
992 }
993 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
994 if (conf.force_given)
995 unlink(socket_name);
996 ct->fd[0] = create_local_socket(socket_name, 0);
997 ct->fd[1] = create_local_socket(socket_name,
998 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
999 if (ct->fd[0] >= 0 || ct->fd[1] >= 0)
1000 return;
1001 PARA_EMERG_LOG("%s\n", para_strerror(-ct->fd[1]));
1002 exit(EXIT_FAILURE);
1003 }
1004
1005 static int signal_post_select(struct sched *s, void *context)
1006 {
1007 struct signal_task *st = context;
1008 int ret, signum;
1009
1010 ret = task_get_notification(st->task);
1011 if (ret < 0)
1012 return ret;
1013 signum = para_next_signal(&s->rfds);
1014 switch (signum) {
1015 case SIGINT:
1016 case SIGTERM:
1017 case SIGHUP:
1018 PARA_NOTICE_LOG("received signal %d\n", signum);
1019 task_notify_all(s, E_AUDIOD_SIGNAL);
1020 return -E_AUDIOD_SIGNAL;
1021 }
1022 return 0;
1023 }
1024
1025 static void command_pre_select(struct sched *s, void *context)
1026 {
1027 struct command_task *ct = context;
1028 int i;
1029
1030 for (i = 0; i < 2; i++)
1031 if (ct->fd[i] >= 0)
1032 para_fd_set(ct->fd[i], &s->rfds, &s->max_fileno);
1033 }
1034
1035 static int command_post_select(struct sched *s, void *context)
1036 {
1037 int ret, i;
1038 struct command_task *ct = context;
1039 static struct timeval last_status_dump;
1040 struct timeval tmp, delay;
1041 bool force = false;
1042
1043 ret = task_get_notification(ct->task);
1044 if (ret < 0)
1045 return ret;
1046 for (i = 0; i < 2; i++) {
1047 if (ct->fd[i] < 0)
1048 continue;
1049 ret = handle_connect(ct->fd[i], &s->rfds);
1050 if (ret < 0) {
1051 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1052 if (ret == -E_AUDIOD_TERM) {
1053 task_notify_all(s, -ret);
1054 return ret;
1055 }
1056 } else if (ret > 0)
1057 force = true;
1058 }
1059 if (force == true)
1060 goto dump;
1061
1062 /* if last status dump was less than 500ms ago, do nothing */
1063 delay.tv_sec = 0;
1064 delay.tv_usec = 500 * 1000;
1065 tv_add(&last_status_dump, &delay, &tmp);
1066 if (tv_diff(now, &tmp, NULL) < 0)
1067 return 0;
1068
1069 /*
1070 * If last status dump was more than 5s ago, force update. Otherwise,
1071 * update only those items that have changed.
1072 */
1073 delay.tv_sec = 5;
1074 delay.tv_usec = 0;
1075 tv_add(&last_status_dump, &delay, &tmp);
1076 if (tv_diff(now, &tmp, NULL) > 0)
1077 force = true;
1078 dump:
1079 audiod_status_dump(force);
1080 last_status_dump = *now;
1081 return 1;
1082 }
1083
1084 static void init_command_task(struct command_task *ct)
1085 {
1086 init_local_sockets(ct); /* doesn't return on errors */
1087
1088 ct->task = task_register(&(struct task_info) {
1089 .name = "command",
1090 .pre_select = command_pre_select,
1091 .post_select = command_post_select,
1092 .context = ct,
1093 }, &sched);
1094 }
1095
1096 static void close_stat_pipe(void)
1097 {
1098 if (!stat_task->ct)
1099 return;
1100 task_reap(&stat_task->ct->task);
1101 client_close(stat_task->ct);
1102 stat_task->ct = NULL;
1103 clear_and_dump_items();
1104 stat_task->length_seconds = 0;
1105 stat_task->offset_seconds = 0;
1106 stat_task->vss_status = 0;
1107 stat_task->current_audio_format_num = -1;
1108 audiod_status_dump(true);
1109 }
1110
1111 /* avoid busy loop if server is down */
1112 static void set_stat_task_restart_barrier(unsigned seconds)
1113 {
1114 struct timeval delay = {seconds, 0};
1115 tv_add(now, &delay, &stat_task->restart_barrier);
1116 }
1117
1118 static bool must_close_slot(int slot_num)
1119 {
1120 struct slot_info *s = &slot[slot_num];
1121 struct audio_format_info *a = afi + s->format;
1122 int i;
1123
1124 if (s->format < 0)
1125 return false;
1126 if (s->receiver_node && task_status(s->receiver_node->task) >= 0)
1127 return false;
1128 for (i = 0; i < a->num_filters; i++)
1129 if (s->fns && task_status(s->fns[i].task) >= 0)
1130 return false;
1131 if (a->num_writers > 0) {
1132 for (i = 0; i < a->num_writers; i++)
1133 if (s->wns && task_status(s->wns[i].task) >= 0)
1134 return false;
1135 } else {
1136 if (s->wns && task_status(s->wns[0].task) >= 0)
1137 return false;
1138 }
1139 return true;
1140 }
1141
1142 static void close_slot(int slot_num)
1143 {
1144 struct slot_info *s = slot + slot_num;
1145
1146 PARA_INFO_LOG("closing slot %d\n", slot_num);
1147 close_writers(s);
1148 close_filters(s);
1149 close_receiver(slot_num);
1150 clear_slot(slot_num);
1151 }
1152
1153 static void close_unused_slots(void)
1154 {
1155 int i;
1156
1157 FOR_EACH_SLOT(i)
1158 if (must_close_slot(i))
1159 close_slot(i);
1160 }
1161
1162 /*
1163 * Cleanup all resources.
1164 *
1165 * This performs various cleanups, removes the audiod socket and closes the
1166 * connection to para_server.
1167 */
1168 static void audiod_cleanup(void)
1169 {
1170 if (socket_name)
1171 unlink(socket_name);
1172 close_stat_pipe();
1173 close_unused_slots();
1174 audiod_cmdline_parser_free(&conf);
1175 close_stat_clients();
1176 }
1177
1178 /*
1179 * Check if any receivers/filters/writers need to be started and do so if
1180 * necessary.
1181 */
1182 static void start_stop_decoders(void)
1183 {
1184 int ret;
1185 struct slot_info *sl;
1186
1187 close_unused_slots();
1188 if (audiod_status != AUDIOD_ON ||
1189 !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1190 return notify_receivers(E_NOT_PLAYING);
1191 if (!must_start_decoder())
1192 return;
1193 ret = open_receiver(stat_task->current_audio_format_num);
1194 if (ret < 0) {
1195 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1196 return;
1197 }
1198 sl = slot + ret;
1199 open_filters(sl);
1200 open_writers(sl);
1201 activate_grab_clients(&sched);
1202 btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1203 }
1204
1205 static void status_pre_select(struct sched *s, void *context)
1206 {
1207 struct status_task *st = context;
1208 int i, ret, cafn = stat_task->current_audio_format_num;
1209
1210 if (must_start_decoder())
1211 goto min_delay;
1212 FOR_EACH_SLOT(i)
1213 if (must_close_slot(i))
1214 goto min_delay;
1215 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1216 if (ret > 0)
1217 goto min_delay;
1218 if (st->ct && audiod_status == AUDIOD_OFF)
1219 goto min_delay;
1220 if (!st->ct && audiod_status != AUDIOD_OFF)
1221 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1222 if (cafn >= 0)
1223 sched_request_barrier(&afi[cafn].restart_barrier, s);
1224 /*
1225 * If para_server is playing we'd like to have a smooth time display
1226 * even if we are running in standby mode. So we request a timeout that
1227 * expires at the next full second.
1228 */
1229 if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1230 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1231 return;
1232 min_delay:
1233 sched_min_delay(s);
1234 }
1235
1236 /* restart the client task if necessary */
1237 static int status_post_select(struct sched *s, void *context)
1238 {
1239 struct status_task *st = context;
1240 int ret;
1241
1242 ret = task_get_notification(st->task);
1243 if (ret < 0)
1244 return ret;
1245 if (audiod_status == AUDIOD_OFF) {
1246 if (!st->ct)
1247 goto out;
1248 if (task_status(st->ct->task) >= 0) {
1249 task_notify(st->ct->task, E_AUDIOD_OFF);
1250 goto out;
1251 }
1252 close_stat_pipe();
1253 st->clock_diff_count = conf.clock_diff_count_arg;
1254 goto out;
1255 }
1256 if (st->ct) {
1257 char *buf;
1258 size_t sz;
1259
1260 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1261 if (ret < 0) {
1262 close_stat_pipe();
1263 goto out;
1264 }
1265 if (st->ct->status != CL_EXECUTING)
1266 goto out;
1267 if (ret == 0) {
1268 struct timeval diff;
1269 tv_diff(now, &st->last_status_read, &diff);
1270 if (diff.tv_sec > 61)
1271 task_notify(st->ct->task, E_STATUS_TIMEOUT);
1272 goto out;
1273 }
1274 btr_merge(st->btrn, st->min_iqs);
1275 sz = btr_next_buffer(st->btrn, &buf);
1276 ret = for_each_stat_item(buf, sz, update_item);
1277 if (ret < 0) {
1278 task_notify(st->ct->task, -ret);
1279 goto out;
1280 }
1281 if (sz != ret) {
1282 btr_consume(st->btrn, sz - ret);
1283 st->last_status_read = *now;
1284 st->min_iqs = 0;
1285 } else /* current status item crosses buffers */
1286 st->min_iqs = sz + 1;
1287 goto out;
1288 }
1289 btr_drain(st->btrn);
1290 st->current_audio_format_num = -1;
1291 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1292 goto out;
1293 if (st->clock_diff_count) { /* get status only one time */
1294 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1295 int argc = 5;
1296 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1297 st->clock_diff_count--;
1298 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1299 set_stat_task_restart_barrier(2);
1300
1301 } else {
1302 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1303 int argc = 4;
1304 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1305 set_stat_task_restart_barrier(5);
1306 }
1307 free(stat_item_values[SI_BASENAME]);
1308 stat_item_values[SI_BASENAME] = para_strdup(
1309 "no connection to para_server");
1310 stat_client_write_item(SI_BASENAME);
1311 st->last_status_read = *now;
1312 out:
1313 start_stop_decoders();
1314 return 0;
1315 }
1316
1317 static void init_status_task(struct status_task *st)
1318 {
1319 memset(st, 0, sizeof(struct status_task));
1320 st->sa_time_diff_sign = 1;
1321 st->clock_diff_count = conf.clock_diff_count_arg;
1322 st->current_audio_format_num = -1;
1323 st->btrn = btr_new_node(&(struct btr_node_description)
1324 EMBRACE(.name = "stat"));
1325
1326 stat_task->task = task_register(&(struct task_info) {
1327 .name = "stat",
1328 .pre_select = status_pre_select,
1329 .post_select = status_post_select,
1330 .context = stat_task,
1331 }, &sched);
1332 }
1333
1334 static void set_initial_status(void)
1335 {
1336 audiod_status = AUDIOD_ON;
1337 if (!conf.mode_given)
1338 return;
1339 if (!strcmp(conf.mode_arg, "sb")) {
1340 audiod_status = AUDIOD_STANDBY;
1341 return;
1342 }
1343 if (!strcmp(conf.mode_arg, "off")) {
1344 audiod_status = AUDIOD_OFF;
1345 return;
1346 }
1347 if (strcmp(conf.mode_arg, "on"))
1348 PARA_WARNING_LOG("invalid mode\n");
1349 }
1350
1351 __noreturn static void print_help_and_die(void)
1352 {
1353 struct ggo_help h = DEFINE_GGO_HELP(audiod);
1354 bool d = conf.detailed_help_given;
1355 unsigned flags;
1356
1357 flags = d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS;
1358 ggo_print_help(&h, flags);
1359
1360 flags = d? GPH_MODULE_FLAGS_DETAILED : GPH_MODULE_FLAGS;
1361 print_receiver_helps(flags);
1362 print_filter_helps(flags);
1363 print_writer_helps(flags);
1364 exit(0);
1365 }
1366
1367 /**
1368 * the main function of para_audiod
1369 *
1370 * \param argc usual argument count
1371 * \param argv usual argument vector
1372 *
1373 * \return EXIT_SUCCESS or EXIT_FAILURE
1374 *
1375 * \sa para_audiod(1)
1376 * */
1377 int main(int argc, char *argv[])
1378 {
1379 int ret, i;
1380 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1381 struct audiod_cmdline_parser_params params = {
1382 .override = 0,
1383 .initialize = 1,
1384 .check_required = 0,
1385 .check_ambiguity = 0,
1386 .print_errors = 1
1387 };
1388
1389 valid_fd_012();
1390 audiod_cmdline_parser_ext(argc, argv, &conf, &params);
1391 daemon_set_loglevel(conf.loglevel_arg);
1392 version_handle_flag("audiod", conf.version_given);
1393 /* init receivers/filters/writers early to make help work */
1394 recv_init();
1395 filter_init();
1396 writer_init();
1397 if (conf.help_given || conf.detailed_help_given)
1398 print_help_and_die();
1399 daemon_drop_privileges_or_die(conf.user_arg, conf.group_arg);
1400 parse_config_or_die();
1401 daemon_init_colors_or_die(conf.color_arg, color_arg_auto, color_arg_no,
1402 conf.logfile_given, conf.log_color_arg, conf.log_color_given);
1403 init_random_seed_or_die();
1404 daemon_set_flag(DF_LOG_TIME);
1405 daemon_set_flag(DF_LOG_HOSTNAME);
1406 daemon_set_flag(DF_LOG_LL);
1407 if (conf.log_timing_given)
1408 daemon_set_flag(DF_LOG_TIMING);
1409 if (conf.logfile_given) {
1410 daemon_set_logfile(conf.logfile_arg);
1411 daemon_open_log_or_die();
1412 }
1413 ret = parse_stream_args();
1414 if (ret < 0) {
1415 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1416 exit(EXIT_FAILURE);
1417 }
1418 daemon_log_welcome("para_audiod");
1419 daemon_set_start_time();
1420 set_initial_status();
1421 FOR_EACH_SLOT(i)
1422 clear_slot(i);
1423 setup_signal_handling();
1424
1425 init_status_task(stat_task);
1426 init_command_task(cmd_task);
1427
1428 if (conf.daemon_given)
1429 daemonize(false /* parent exits immediately */);
1430
1431 signal_task->task = task_register(&(struct task_info) {
1432 .name = "signal",
1433 .pre_select = signal_pre_select,
1434 .post_select = signal_post_select,
1435 .context = signal_task,
1436 }, &sched);
1437
1438 sched.default_timeout.tv_sec = 2;
1439 sched.default_timeout.tv_usec = 999 * 1000;
1440 ret = schedule(&sched);
1441 audiod_cleanup();
1442 sched_shutdown(&sched);
1443 signal_shutdown(signal_task);
1444
1445 if (ret < 0)
1446 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1447 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1448 }