audiod: Fix time string.
[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 = writers + wn->writer_num;
344
345 w->close(wn);
346 btr_free_node(wn->btrn);
347 }
348
349 static void close_writers(struct slot_info *s)
350 {
351 struct audio_format_info *a;
352 int i;
353
354 if (s->format < 0)
355 return;
356 a = afi + s->format;
357 if (a->num_writers == 0)
358 writer_cleanup(s->wns);
359 else {
360 for (i = 0; i < a->num_writers; i++)
361 writer_cleanup(s->wns + i);
362 }
363 free(s->wns);
364 s->wns = NULL;
365 }
366
367 static void _close_filters(struct slot_info *s)
368 {
369 int i;
370 struct audio_format_info *a = afi + s->format;
371 if (a->num_filters == 0)
372 return;
373 for (i = 0; i < a->num_filters; i++) {
374 struct filter_node *fn = s->fns + i;
375 struct filter *f = filters + fn->filter_num;
376
377 f->close(fn);
378 btr_free_node(fn->btrn);
379 }
380 free(s->fns);
381 s->fns = NULL;
382 }
383
384 static void kill_all_decoders(int error)
385 {
386 int i, j;
387
388 FOR_EACH_SLOT(i) {
389 struct slot_info *s = &slot[i];
390 struct audio_format_info *a;
391 if (s->format < 0)
392 continue;
393 a = afi + s->format;
394 if (s->wns)
395 for (j = 0; j < a->num_writers; j++)
396 s->wns[j].task.error = error;
397 if (s->fns)
398 for (j = 0; j < a->num_writers; j++)
399 s->fns[j].task.error = error;
400 if (s->receiver_node)
401 s->receiver_node->task.error = error;
402 }
403 }
404
405 static int get_empty_slot(void)
406 {
407 int i;
408 struct slot_info *s;
409
410 FOR_EACH_SLOT(i) {
411 s = &slot[i];
412 if (s->format < 0) {
413 clear_slot(i);
414 return i;
415 }
416 if (s->wns || s->receiver_node || s->fns)
417 continue;
418 clear_slot(i);
419 return i;
420 }
421 return -E_NO_MORE_SLOTS;
422 }
423
424 /**
425 * get the number of filters
426 *
427 * \param audio_format_num the number identifying the audio format
428 *
429 * \return the number of filters for the given audio format
430 *
431 * \sa struct filter;
432 */
433 int num_filters(int audio_format_num)
434 {
435 return afi[audio_format_num].num_filters;
436 }
437
438 static void open_filters(struct slot_info *s)
439 {
440 struct audio_format_info *a = afi + s->format;
441 struct filter_node *fn;
442 int nf = a->num_filters;
443 struct btr_node *parent;
444 int i;
445
446 if (nf == 0)
447 return;
448 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
449 assert(s->fns == NULL);
450 s->fns = para_calloc(nf * sizeof(struct filter_node));
451 parent = s->receiver_node->btrn;
452 for (i = 0; i < nf; i++) {
453 struct filter *f = filters + a->filter_nums[i];
454 fn = s->fns + i;
455 fn->filter_num = a->filter_nums[i];
456 fn->conf = a->filter_conf[i];
457 fn->task.pre_select = f->pre_select;
458 fn->task.post_select = f->post_select;
459 fn->btrn = btr_new_node(f->name, parent, f->execute, fn);
460 f->open(fn);
461 register_task(&fn->task);
462 parent = fn->btrn;
463 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
464 audio_formats[s->format], i, nf, f->name, s - slot);
465 sprintf(fn->task.status, "%s (slot %d)", f->name, s - slot);
466 }
467 }
468
469 static void open_writers(struct slot_info *s)
470 {
471 int i;
472 struct audio_format_info *a = afi + s->format;
473 struct writer_node *wn;
474 struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
475
476 assert(s->wns == NULL);
477 s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
478 * sizeof(struct writer_node));
479 if (a->num_writers == 0)
480 setup_writer_node(NULL, parent, s->wns);
481 else {
482 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
483 for (i = 0; i < a->num_writers; i++) {
484 wn = s->wns + i;
485 wn->conf = a->writer_conf[i];
486 wn->writer_num = a->writer_nums[i];
487 register_writer_node(wn, parent);
488 }
489 }
490 }
491
492 /* returns slot num on success */
493 static int open_receiver(int format)
494 {
495 struct audio_format_info *a = &afi[format];
496 struct slot_info *s;
497 int ret, slot_num;
498 struct receiver *r = a->receiver;
499 struct receiver_node *rn;
500 const struct timeval restart_delay = {2, 0};
501
502 ret = get_empty_slot();
503 if (ret < 0)
504 goto err;
505 slot_num = ret;
506 s = &slot[slot_num];
507 s->format = format;
508 s->receiver_node = para_calloc(sizeof(struct receiver_node));
509 rn = s->receiver_node;
510 rn->receiver = r;
511 rn->conf = a->receiver_conf;
512 rn->btrn = btr_new_node(r->name, NULL, NULL, rn);
513 ret = r->open(rn);
514 if (ret < 0) {
515 btr_free_node(rn->btrn);
516 free(rn);
517 s->receiver_node = NULL;
518 goto err;
519 }
520 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
521 audio_formats[s->format], r->name, slot_num);
522 rn->task.pre_select = r->pre_select;
523 rn->task.post_select = r->post_select;
524 sprintf(rn->task.status, "%s receiver node", r->name);
525 register_task(&rn->task);
526 ret = slot_num;
527 err:
528 if (ret < 0)
529 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
530 tv_add(now, &restart_delay, &afi[format].restart_barrier);
531 return ret;
532 }
533
534 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
535 static int receiver_running(int format)
536 {
537 int i, ret = 0;
538
539 FOR_EACH_SLOT(i) {
540 struct slot_info *s = &slot[i];
541 if (s->format != format)
542 continue;
543 if (!s->receiver_node)
544 continue;
545 if (s->receiver_node->task.error >= 0)
546 return 1;
547 ret = -1;
548 }
549 return ret;
550 }
551
552 struct btr_node *audiod_get_btr_root(void)
553 {
554 int i, newest_slot = -1;
555 struct timeval newest_rstime = {0, 0};
556
557 FOR_EACH_SLOT(i) {
558 struct slot_info *s = &slot[i];
559 struct timeval rstime;
560 if (!s->receiver_node)
561 continue;
562 if (s->receiver_node->task.error < 0)
563 continue;
564 btr_get_node_start(s->receiver_node->btrn, &rstime);
565 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
566 continue;
567 newest_rstime = rstime;
568 newest_slot = i;
569 }
570 if (newest_slot == -1)
571 return NULL;
572 return slot[newest_slot].receiver_node->btrn;
573 }
574
575 /* returns slot num on success. */
576 static int open_current_receiver(struct sched *s)
577 {
578 struct timeval diff;
579 int ret, cafn = stat_task->current_audio_format_num;
580
581 if (cafn < 0 || !stat_task->ct)
582 return -1;
583 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
584 if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
585 return -1;
586 ret = receiver_running(cafn);
587 if (ret > 0) /* already running and not eof */
588 return -1;
589 if (ret < 0) { /* eof */
590 /*
591 * para_server uses a zero start time during the announcement
592 * period, i.e. before it sends the first chunk. Wait until
593 * this period begins to avoid restarting the receiver that
594 * belongs to the file just completed.
595 */
596 if (stat_task->server_stream_start.tv_sec != 0)
597 sched_request_timeout_ms(100, s);
598 }
599 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
600 if (tv_diff(&s->timeout, &diff, NULL) > 0)
601 s->timeout = diff;
602 else
603 sched_min_delay(s);
604 return -1;
605 }
606 /* start a new receiver */
607 return open_receiver(cafn);
608 }
609
610 static unsigned compute_time_diff(const struct timeval *status_time)
611 {
612 struct timeval tmp, diff;
613 static unsigned count;
614 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
615 const struct timeval max_deviation = {0, 500 * 1000};
616 const int time_smooth = 5;
617
618 if (!status_time)
619 return count;
620 sign = tv_diff(status_time, now, &diff);
621 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
622 // sign, sa_time_diff_sign);
623 if (!count) {
624 sa_time_diff_sign = sign;
625 stat_task->sa_time_diff = diff;
626 count++;
627 goto out;
628 }
629 if (count > 5) {
630 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
631 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
632 PARA_WARNING_LOG("time diff jump: %lims\n",
633 s * tv2ms(&tmp));
634 }
635 count++;
636 sa_time_diff_sign = tv_convex_combination(
637 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
638 count > 10? sign : sign * time_smooth, &diff,
639 &tmp);
640 stat_task->sa_time_diff = tmp;
641 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
642 sign > 0? "+" : "-",
643 tv2ms(&diff),
644 sa_time_diff_sign ? "+" : "-",
645 tv2ms(&stat_task->sa_time_diff)
646 );
647 out:
648 stat_task->sa_time_diff_sign = sa_time_diff_sign;
649 return count;
650 }
651
652 static int update_item(int itemnum, char *buf)
653 {
654 long unsigned sec, usec;
655
656 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
657 return 1;
658 free(stat_item_values[itemnum]);
659 stat_item_values[itemnum] = para_strdup(buf);
660 stat_client_write_item(itemnum);
661 switch (itemnum) {
662 case SI_STATUS_FLAGS:
663 stat_task->vss_status = 0;
664 if (strchr(buf, 'N'))
665 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
666 if (strchr(buf, 'P'))
667 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
668 break;
669 case SI_OFFSET:
670 stat_task->offset_seconds = atoi(buf);
671 break;
672 case SI_SECONDS_TOTAL:
673 stat_task->length_seconds = atoi(buf);
674 break;
675 case SI_STREAM_START:
676 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
677 struct timeval a_start, delay;
678 delay.tv_sec = conf.stream_delay_arg / 1000;
679 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
680 stat_task->server_stream_start.tv_sec = sec;
681 stat_task->server_stream_start.tv_usec = usec;
682 if (compute_time_diff(NULL) > 2) {
683 if (stat_task->sa_time_diff_sign < 0)
684 tv_add(&stat_task->server_stream_start,
685 &stat_task->sa_time_diff, &a_start);
686 else
687 tv_diff(&stat_task->server_stream_start,
688 &stat_task->sa_time_diff, &a_start);
689 tv_add(&a_start, &delay, &initial_delay_barrier);
690 }
691 }
692 break;
693 case SI_CURRENT_TIME:
694 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
695 struct timeval tv = {sec, usec};
696 compute_time_diff(&tv);
697 }
698 break;
699 case SI_FORMAT:
700 stat_task->current_audio_format_num
701 = get_audio_format_num(buf);
702 }
703 return 1;
704 }
705
706 static int parse_stream_command(const char *txt, char **cmd)
707 {
708 char *p = strchr(txt, ':');
709 int i;
710
711 if (!p)
712 return -E_MISSING_COLON;
713 p++;
714 FOR_EACH_AUDIO_FORMAT(i) {
715 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
716 continue;
717 *cmd = p;
718 return i;
719 }
720 return -E_UNSUPPORTED_AUDIO_FORMAT;
721 }
722
723 static int add_filter(int format, char *cmdline)
724 {
725 struct audio_format_info *a = &afi[format];
726 int filter_num, nf = a->num_filters;
727
728 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
729 if (filter_num < 0)
730 return filter_num;
731 a->filter_nums[nf] = filter_num;
732 a->num_filters++;
733 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
734 filters[filter_num].name);
735 return filter_num;
736 }
737
738 static int parse_writer_args(void)
739 {
740 int i, ret, nw;
741 char *cmd;
742 struct audio_format_info *a;
743
744 nw = PARA_MAX(1U, conf.writer_given);
745 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
746 FOR_EACH_AUDIO_FORMAT(i) {
747 a = &afi[i];
748 a->writer_conf = para_malloc(nw * sizeof(void *));
749 a->writer_nums = para_malloc(nw * sizeof(int));
750 a->num_writers = 0;
751 }
752 for (i = 0; i < conf.writer_given; i++) {
753 void *wconf;
754 int writer_num;
755 ret = parse_stream_command(conf.writer_arg[i], &cmd);
756 if (ret < 0)
757 goto out;
758 a = &afi[ret];
759 nw = a->num_writers;
760 wconf = check_writer_arg(cmd, &writer_num);
761 if (!wconf) {
762 ret = writer_num;
763 goto out;
764 }
765 a->writer_nums[nw] = writer_num;
766 a->writer_conf[nw] = wconf;
767 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
768 nw, writer_names[writer_num]);
769 a->num_writers++;
770 }
771 ret = 1;
772 out:
773 return ret;
774 }
775
776 static int parse_receiver_args(void)
777 {
778 int i, ret, receiver_num;
779 char *cmd = NULL;
780 struct audio_format_info *a;
781
782 for (i = conf.receiver_given - 1; i >= 0; i--) {
783 char *arg = conf.receiver_arg[i];
784 char *recv_arg = strchr(arg, ':');
785 ret = -E_MISSING_COLON;
786 if (!recv_arg)
787 goto out;
788 *recv_arg = '\0';
789 recv_arg++;
790 ret = get_audio_format_num(arg);
791 if (ret < 0)
792 goto out;
793 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
794 if (!afi[ret].receiver_conf) {
795 ret = -E_RECV_SYNTAX;
796 goto out;
797 }
798 afi[ret].receiver = &receivers[receiver_num];
799 }
800 /* use the first available receiver with no arguments
801 * for those audio formats for which no receiver
802 * was specified
803 */
804 cmd = para_strdup(receivers[0].name);
805 FOR_EACH_AUDIO_FORMAT(i) {
806 a = &afi[i];
807 if (a->receiver_conf)
808 continue;
809 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
810 if (!a->receiver_conf)
811 return -E_RECV_SYNTAX;
812 a->receiver = &receivers[receiver_num];
813 }
814 ret = 1;
815 out:
816 free(cmd);
817 return ret;
818 }
819
820 static int init_default_filters(void)
821 {
822 int i, ret = 1;
823
824 FOR_EACH_AUDIO_FORMAT(i) {
825 struct audio_format_info *a = &afi[i];
826 char *tmp;
827 int j;
828
829 if (a->num_filters)
830 continue; /* no default -- nothing to to */
831 /* add "dec" to audio format name */
832 tmp = make_message("%sdec", audio_formats[i]);
833 for (j = 0; filters[j].name; j++)
834 if (!strcmp(tmp, filters[j].name))
835 break;
836 free(tmp);
837 ret = -E_UNSUPPORTED_FILTER;
838 if (!filters[j].name)
839 goto out;
840 tmp = para_strdup(filters[j].name);
841 ret = add_filter(i, tmp);
842 free(tmp);
843 if (ret < 0)
844 goto out;
845 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
846 filters[j].name);
847 }
848 out:
849 return ret;
850 }
851
852 static int parse_filter_args(void)
853 {
854 int i, ret, nf;
855
856 nf = PARA_MAX(1U, conf.filter_given);
857 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
858 FOR_EACH_AUDIO_FORMAT(i) {
859 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
860 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
861 }
862 if (!conf.no_default_filters_given)
863 return init_default_filters();
864 for (i = 0; i < conf.filter_given; i++) {
865 char *arg = conf.filter_arg[i];
866 char *filter_name = strchr(arg, ':');
867 ret = -E_MISSING_COLON;
868 if (!filter_name)
869 goto out;
870 *filter_name = '\0';
871 filter_name++;
872 ret = get_audio_format_num(arg);
873 if (ret < 0)
874 goto out;
875 ret = add_filter(ret, filter_name);
876 if (ret < 0)
877 goto out;
878 }
879 ret = init_default_filters(); /* use default values for the rest */
880 out:
881 return ret;
882 }
883
884 static int parse_stream_args(void)
885 {
886 int ret;
887
888 ret = parse_receiver_args();
889 if (ret < 0)
890 return ret;
891 ret = parse_filter_args();
892 if (ret < 0)
893 return ret;
894 ret = parse_writer_args();
895 if (ret < 0)
896 return ret;
897 return 1;
898 }
899
900 /* does not unlink socket on errors */
901 static int audiod_get_socket(void)
902 {
903 struct sockaddr_un unix_addr;
904 int ret, fd;
905
906 if (conf.socket_given)
907 socket_name = para_strdup(conf.socket_arg);
908 else {
909 char *hn = para_hostname();
910 socket_name = make_message("/var/paraslash/audiod_socket.%s",
911 hn);
912 free(hn);
913 }
914 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
915 if (conf.force_given)
916 unlink(socket_name);
917 ret = create_local_socket(socket_name, &unix_addr,
918 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
919 if (ret < 0)
920 goto err;
921 fd = ret;
922 if (listen(fd , 5) < 0) {
923 ret = -ERRNO_TO_PARA_ERROR(errno);
924 goto err;
925 }
926 ret = mark_fd_nonblocking(fd);
927 if (ret < 0)
928 goto err;
929 return fd;
930 err:
931 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
932 exit(EXIT_FAILURE);
933 }
934
935 static void signal_pre_select(struct sched *s, struct task *t)
936 {
937 struct signal_task *st = container_of(t, struct signal_task, task);
938 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
939 }
940
941 static void signal_post_select(struct sched *s, struct task *t)
942 {
943 struct signal_task *st = container_of(t, struct signal_task, task);
944
945 if (!FD_ISSET(st->fd, &s->rfds))
946 return;
947
948 st->signum = para_next_signal();
949 switch (st->signum) {
950 case SIGINT:
951 case SIGTERM:
952 case SIGHUP:
953 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
954 clean_exit(EXIT_FAILURE, "caught deadly signal");
955 }
956 }
957
958 static void signal_setup_default(struct signal_task *st)
959 {
960 st->task.pre_select = signal_pre_select;
961 st->task.post_select = signal_post_select;
962 sprintf(st->task.status, "signal task");
963 }
964
965 static void command_pre_select(struct sched *s, struct task *t)
966 {
967 struct command_task *ct = container_of(t, struct command_task, task);
968 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
969 }
970
971 static void command_post_select(struct sched *s, struct task *t)
972 {
973 int ret;
974 struct command_task *ct = container_of(t, struct command_task, task);
975 static struct timeval last_status_dump;
976 struct timeval tmp, delay = {0, 500 * 1000};
977
978 tv_add(&last_status_dump, &delay, &tmp);
979 if (tv_diff(&tmp, now, NULL) < 0) {
980 audiod_status_dump();
981 last_status_dump = *now;
982 }
983
984 if (!FD_ISSET(ct->fd, &s->rfds))
985 return;
986 ret = handle_connect(ct->fd);
987 if (ret < 0)
988 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
989 }
990
991 static void init_command_task(struct command_task *ct)
992 {
993 ct->task.pre_select = command_pre_select;
994 ct->task.post_select = command_post_select;
995 ct->task.error = 0;
996 ct->fd = audiod_get_socket(); /* doesn't return on errors */
997 sprintf(ct->task.status, "command task");
998 }
999
1000 static void close_stat_pipe(void)
1001 {
1002 if (!stat_task->ct)
1003 return;
1004 client_close(stat_task->ct);
1005 stat_task->ct = NULL;
1006 clear_and_dump_items();
1007 stat_task->length_seconds = 0;
1008 stat_task->offset_seconds = 0;
1009 stat_task->vss_status = 0;
1010 stat_task->current_audio_format_num = -1;
1011 audiod_status_dump();
1012 }
1013
1014 /**
1015 * close the connection to para_server and exit
1016 *
1017 * \param status the exit status which is passed to exit(3)
1018 * \param msg the log message
1019 *
1020 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1021 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1022 * EXIT_FAILURE.
1023 *
1024 * \sa exit(3)
1025 */
1026 void __noreturn clean_exit(int status, const char *msg)
1027 {
1028 PARA_EMERG_LOG("%s\n", msg);
1029 if (socket_name)
1030 unlink(socket_name);
1031 close_stat_pipe();
1032 exit(status);
1033 }
1034
1035 /* avoid busy loop if server is down */
1036 static void set_stat_task_restart_barrier(unsigned seconds)
1037 {
1038 struct timeval delay = {seconds, 0};
1039 tv_add(now, &delay, &stat_task->restart_barrier);
1040 }
1041
1042 static bool try_to_close_slot(int slot_num)
1043 {
1044 struct slot_info *s = &slot[slot_num];
1045 struct audio_format_info *a = afi + s->format;
1046 int i;
1047
1048 if (s->format < 0)
1049 return false;
1050 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
1051 return false;
1052 for (i = 0; i < a->num_filters; i++)
1053 if (s->fns && s->fns[i].task.error != -E_TASK_UNREGISTERED)
1054 return false;
1055 for (i = 0; i < a->num_writers; i++)
1056 if (s->wns && s->wns[i].task.error != -E_TASK_UNREGISTERED)
1057 return false;
1058 PARA_INFO_LOG("closing slot %d\n", slot_num);
1059 close_writers(s);
1060 _close_filters(s);
1061 close_receiver(slot_num);
1062 clear_slot(slot_num);
1063 return true;
1064 }
1065
1066 /*
1067 * Check if any receivers/filters/writers need to be started and do so if
1068 * necessary.
1069 */
1070 static void start_stop_decoders(struct sched *s)
1071 {
1072 int i, ret;
1073 struct slot_info *sl;
1074 struct audio_format_info *a;
1075
1076 FOR_EACH_SLOT(i)
1077 if (try_to_close_slot(i))
1078 sched_min_delay(s);
1079 // if (audiod_status != AUDIOD_ON ||
1080 // !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1081 // return kill_all_decoders(-E_NOT_PLAYING);
1082 ret = open_current_receiver(s);
1083 if (ret < 0)
1084 return;
1085 sl = slot + ret;
1086 a = afi + sl->format;
1087 if (a->num_filters)
1088 open_filters(sl);
1089 open_writers(sl);
1090 activate_grab_clients();
1091 btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1092 sched_min_delay(s);
1093 }
1094
1095 /* restart the client task if necessary */
1096 static void status_pre_select(struct sched *s, struct task *t)
1097 {
1098 struct status_task *st = container_of(t, struct status_task, task);
1099
1100 if (audiod_status == AUDIOD_OFF) {
1101 if (!st->ct)
1102 goto out;
1103 if (st->ct->task.error >= 0) {
1104 st->ct->task.error = -E_AUDIOD_OFF;
1105 goto out;
1106 }
1107 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1108 goto out;
1109 close_stat_pipe();
1110 st->clock_diff_count = conf.clock_diff_count_arg;
1111 goto out;
1112 }
1113 if (st->ct) {
1114 int ret;
1115 if (st->ct->task.error < 0) {
1116 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1117 goto out;
1118 close_stat_pipe();
1119 goto out;
1120 }
1121 if (st->ct->status != CL_RECEIVING)
1122 goto out;
1123 ret = for_each_stat_item(st->ct->buf, st->ct->loaded,
1124 update_item);
1125 if (ret < 0) {
1126 st->ct->task.error = ret;
1127 goto out;
1128 }
1129 if (st->ct->loaded != ret) {
1130 st->last_status_read = *now;
1131 st->ct->loaded = ret;
1132 } else {
1133 struct timeval diff;
1134 tv_diff(now, &st->last_status_read, &diff);
1135 if (diff.tv_sec > 61)
1136 st->ct->task.error = -E_STATUS_TIMEOUT;
1137 }
1138 goto out;
1139 }
1140 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1141 goto out;
1142 if (st->clock_diff_count) { /* get status only one time */
1143 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1144 int argc = 5;
1145 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1146 st->clock_diff_count--;
1147 client_open(argc, argv, &st->ct, NULL);
1148 set_stat_task_restart_barrier(2);
1149 sched_min_delay(s);
1150
1151 } else {
1152 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1153 int argc = 4;
1154 client_open(argc, argv, &st->ct, NULL);
1155 set_stat_task_restart_barrier(5);
1156 sched_min_delay(s);
1157 }
1158 free(stat_item_values[SI_BASENAME]);
1159 stat_item_values[SI_BASENAME] = para_strdup(
1160 "no connection to para_server");
1161 stat_client_write_item(SI_BASENAME);
1162 st->last_status_read = *now;
1163 out:
1164 start_stop_decoders(s);
1165 }
1166
1167 static void init_status_task(struct status_task *st)
1168 {
1169 memset(st, 0, sizeof(struct status_task));
1170 st->task.pre_select = status_pre_select;
1171 st->sa_time_diff_sign = 1;
1172 st->clock_diff_count = conf.clock_diff_count_arg;
1173 st->current_audio_format_num = -1;
1174 sprintf(st->task.status, "status task");
1175 }
1176
1177 static void set_initial_status(void)
1178 {
1179 audiod_status = AUDIOD_ON;
1180 if (!conf.mode_given)
1181 return;
1182 if (!strcmp(conf.mode_arg, "sb")) {
1183 audiod_status = AUDIOD_STANDBY;
1184 return;
1185 }
1186 if (!strcmp(conf.mode_arg, "off")) {
1187 audiod_status = AUDIOD_OFF;
1188 return;
1189 }
1190 if (strcmp(conf.mode_arg, "on"))
1191 PARA_WARNING_LOG("invalid mode\n");
1192 }
1193
1194 __noreturn static void print_help_and_die(void)
1195 {
1196 int d = conf.detailed_help_given;
1197 const char **p = d? audiod_args_info_detailed_help
1198 : audiod_args_info_help;
1199
1200 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1201 AUDIOD_CMDLINE_PARSER_VERSION);
1202 printf_or_die("%s\n\n", audiod_args_info_usage);
1203 for (; *p; p++)
1204 printf_or_die("%s\n", *p);
1205 print_receiver_helps(d);
1206 print_filter_helps(d);
1207 print_writer_helps(d);
1208 exit(0);
1209 }
1210
1211 static void init_colors_or_die(void)
1212 {
1213 int ret, i;
1214
1215 if (!want_colors())
1216 return;
1217 daemon_set_default_log_colors();
1218 daemon_set_flag(DF_COLOR_LOG);
1219 for (i = 0; i < conf.log_color_given; i++) {
1220 ret = daemon_set_log_color(conf.log_color_arg[i]);
1221 if (ret < 0)
1222 exit(EXIT_FAILURE);
1223 }
1224 }
1225
1226 /**
1227 * the main function of para_audiod
1228 *
1229 * \param argc usual argument count
1230 * \param argv usual argument vector
1231 *
1232 * \return EXIT_SUCCESS or EXIT_FAILURE
1233 *
1234 * \sa para_audiod(1)
1235 * */
1236 int main(int argc, char *argv[])
1237 {
1238 int ret, i;
1239 static struct sched s;
1240 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1241 struct audiod_cmdline_parser_params params = {
1242 .override = 0,
1243 .initialize = 1,
1244 .check_required = 0,
1245 .check_ambiguity = 0,
1246 .print_errors = 1
1247 };
1248
1249 valid_fd_012();
1250 if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1251 exit(EXIT_FAILURE);
1252 HANDLE_VERSION_FLAG("audiod", conf);
1253 /* init receivers/filters/writers early to make help work */
1254 recv_init();
1255 filter_init();
1256 writer_init();
1257 if (conf.help_given || conf.detailed_help_given)
1258 print_help_and_die();
1259 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1260 parse_config_or_die();
1261 init_colors_or_die();
1262 init_random_seed_or_die();
1263 daemon_set_flag(DF_LOG_TIME);
1264 daemon_set_flag(DF_LOG_HOSTNAME);
1265 daemon_set_flag(DF_LOG_LL);
1266 if (conf.log_timing_given)
1267 daemon_set_flag(DF_LOG_TIMING);
1268 if (conf.logfile_given) {
1269 daemon_set_logfile(conf.logfile_arg);
1270 daemon_open_log_or_die();
1271 }
1272 ret = parse_stream_args();
1273 if (ret < 0) {
1274 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1275 exit(EXIT_FAILURE);
1276 }
1277 log_welcome("para_audiod");
1278 server_uptime(UPTIME_SET);
1279 set_initial_status();
1280 FOR_EACH_SLOT(i)
1281 clear_slot(i);
1282 setup_signal_handling();
1283 signal_setup_default(sig_task);
1284
1285 init_status_task(stat_task);
1286 init_command_task(cmd_task);
1287
1288 if (conf.daemon_given)
1289 daemonize();
1290
1291 register_task(&sig_task->task);
1292 register_task(&cmd_task->task);
1293 register_task(&stat_task->task);
1294 s.default_timeout.tv_sec = 2;
1295 s.default_timeout.tv_usec = 999 * 1000;
1296 ret = schedule(&s);
1297
1298 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1299 return EXIT_FAILURE;
1300 }