audiod: Make writer_cleanup() accept NULL pointer argument.
[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 = filters + fn->filter_num;
380
381 f->close(fn);
382 btr_free_node(fn->btrn);
383 }
384 free(s->fns);
385 s->fns = NULL;
386 }
387
388 static void kill_all_decoders(int error)
389 {
390 int i, j;
391
392 FOR_EACH_SLOT(i) {
393 struct slot_info *s = &slot[i];
394 struct audio_format_info *a;
395 if (s->format < 0)
396 continue;
397 a = afi + s->format;
398 if (s->wns)
399 for (j = 0; j < a->num_writers; j++)
400 s->wns[j].task.error = error;
401 if (s->fns)
402 for (j = 0; j < a->num_writers; j++)
403 s->fns[j].task.error = error;
404 if (s->receiver_node)
405 s->receiver_node->task.error = error;
406 }
407 }
408
409 static int get_empty_slot(void)
410 {
411 int i;
412 struct slot_info *s;
413
414 FOR_EACH_SLOT(i) {
415 s = &slot[i];
416 if (s->format < 0) {
417 clear_slot(i);
418 return i;
419 }
420 if (s->wns || s->receiver_node || s->fns)
421 continue;
422 clear_slot(i);
423 return i;
424 }
425 return -E_NO_MORE_SLOTS;
426 }
427
428 /**
429 * get the number of filters
430 *
431 * \param audio_format_num the number identifying the audio format
432 *
433 * \return the number of filters for the given audio format
434 *
435 * \sa struct filter;
436 */
437 int num_filters(int audio_format_num)
438 {
439 return afi[audio_format_num].num_filters;
440 }
441
442 static void open_filters(struct slot_info *s)
443 {
444 struct audio_format_info *a = afi + s->format;
445 struct filter_node *fn;
446 int nf = a->num_filters;
447 struct btr_node *parent;
448 int i;
449
450 if (nf == 0)
451 return;
452 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
453 assert(s->fns == NULL);
454 s->fns = para_calloc(nf * sizeof(struct filter_node));
455 parent = s->receiver_node->btrn;
456 for (i = 0; i < nf; i++) {
457 struct filter *f = filters + a->filter_nums[i];
458 fn = s->fns + i;
459 fn->filter_num = a->filter_nums[i];
460 fn->conf = a->filter_conf[i];
461 fn->task.pre_select = f->pre_select;
462 fn->task.post_select = f->post_select;
463 fn->btrn = btr_new_node(f->name, parent, f->execute, fn);
464 f->open(fn);
465 register_task(&fn->task);
466 parent = fn->btrn;
467 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
468 audio_formats[s->format], i, nf, f->name, s - slot);
469 sprintf(fn->task.status, "%s (slot %d)", f->name, s - slot);
470 }
471 }
472
473 static void open_writers(struct slot_info *s)
474 {
475 int i;
476 struct audio_format_info *a = afi + s->format;
477 struct writer_node *wn;
478 struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
479
480 assert(s->wns == NULL);
481 s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
482 * sizeof(struct writer_node));
483 if (a->num_writers == 0)
484 setup_writer_node(NULL, parent, s->wns);
485 else {
486 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
487 for (i = 0; i < a->num_writers; i++) {
488 wn = s->wns + i;
489 wn->conf = a->writer_conf[i];
490 wn->writer_num = a->writer_nums[i];
491 register_writer_node(wn, parent);
492 }
493 }
494 }
495
496 /* returns slot num on success */
497 static int open_receiver(int format)
498 {
499 struct audio_format_info *a = &afi[format];
500 struct slot_info *s;
501 int ret, slot_num;
502 struct receiver *r = a->receiver;
503 struct receiver_node *rn;
504 const struct timeval restart_delay = {2, 0};
505
506 ret = get_empty_slot();
507 if (ret < 0)
508 goto err;
509 slot_num = ret;
510 s = &slot[slot_num];
511 s->format = format;
512 s->receiver_node = para_calloc(sizeof(struct receiver_node));
513 rn = s->receiver_node;
514 rn->receiver = r;
515 rn->conf = a->receiver_conf;
516 rn->btrn = btr_new_node(r->name, NULL, NULL, rn);
517 ret = r->open(rn);
518 if (ret < 0) {
519 btr_free_node(rn->btrn);
520 free(rn);
521 s->receiver_node = NULL;
522 goto err;
523 }
524 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
525 audio_formats[s->format], r->name, slot_num);
526 rn->task.pre_select = r->pre_select;
527 rn->task.post_select = r->post_select;
528 sprintf(rn->task.status, "%s receiver node", r->name);
529 register_task(&rn->task);
530 ret = slot_num;
531 err:
532 if (ret < 0)
533 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
534 tv_add(now, &restart_delay, &afi[format].restart_barrier);
535 return ret;
536 }
537
538 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
539 static int receiver_running(int format)
540 {
541 int i, ret = 0;
542
543 FOR_EACH_SLOT(i) {
544 struct slot_info *s = &slot[i];
545 if (s->format != format)
546 continue;
547 if (!s->receiver_node)
548 continue;
549 if (s->receiver_node->task.error >= 0)
550 return 1;
551 ret = -1;
552 }
553 return ret;
554 }
555
556 struct btr_node *audiod_get_btr_root(void)
557 {
558 int i, newest_slot = -1;
559 struct timeval newest_rstime = {0, 0};
560
561 FOR_EACH_SLOT(i) {
562 struct slot_info *s = &slot[i];
563 struct timeval rstime;
564 if (!s->receiver_node)
565 continue;
566 if (s->receiver_node->task.error < 0)
567 continue;
568 btr_get_node_start(s->receiver_node->btrn, &rstime);
569 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
570 continue;
571 newest_rstime = rstime;
572 newest_slot = i;
573 }
574 if (newest_slot == -1)
575 return NULL;
576 return slot[newest_slot].receiver_node->btrn;
577 }
578
579 /* returns slot num on success. */
580 static int open_current_receiver(struct sched *s)
581 {
582 struct timeval diff;
583 int ret, cafn = stat_task->current_audio_format_num;
584
585 if (cafn < 0 || !stat_task->ct)
586 return -1;
587 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
588 if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
589 return -1;
590 ret = receiver_running(cafn);
591 if (ret > 0) /* already running and not eof */
592 return -1;
593 if (ret < 0) { /* eof */
594 /*
595 * para_server uses a zero start time during the announcement
596 * period, i.e. before it sends the first chunk. Wait until
597 * this period begins to avoid restarting the receiver that
598 * belongs to the file just completed.
599 */
600 if (stat_task->server_stream_start.tv_sec != 0)
601 sched_request_timeout_ms(100, s);
602 }
603 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
604 if (tv_diff(&s->timeout, &diff, NULL) > 0)
605 s->timeout = diff;
606 else
607 sched_min_delay(s);
608 return -1;
609 }
610 /* start a new receiver */
611 return open_receiver(cafn);
612 }
613
614 static unsigned compute_time_diff(const struct timeval *status_time)
615 {
616 struct timeval tmp, diff;
617 static unsigned count;
618 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
619 const struct timeval max_deviation = {0, 500 * 1000};
620 const int time_smooth = 5;
621
622 if (!status_time)
623 return count;
624 sign = tv_diff(status_time, now, &diff);
625 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
626 // sign, sa_time_diff_sign);
627 if (!count) {
628 sa_time_diff_sign = sign;
629 stat_task->sa_time_diff = diff;
630 count++;
631 goto out;
632 }
633 if (count > 5) {
634 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
635 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
636 PARA_WARNING_LOG("time diff jump: %lims\n",
637 s * tv2ms(&tmp));
638 }
639 count++;
640 sa_time_diff_sign = tv_convex_combination(
641 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
642 count > 10? sign : sign * time_smooth, &diff,
643 &tmp);
644 stat_task->sa_time_diff = tmp;
645 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
646 sign > 0? "+" : "-",
647 tv2ms(&diff),
648 sa_time_diff_sign ? "+" : "-",
649 tv2ms(&stat_task->sa_time_diff)
650 );
651 out:
652 stat_task->sa_time_diff_sign = sa_time_diff_sign;
653 return count;
654 }
655
656 static int update_item(int itemnum, char *buf)
657 {
658 long unsigned sec, usec;
659
660 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
661 return 1;
662 free(stat_item_values[itemnum]);
663 stat_item_values[itemnum] = para_strdup(buf);
664 stat_client_write_item(itemnum);
665 switch (itemnum) {
666 case SI_STATUS_FLAGS:
667 stat_task->vss_status = 0;
668 if (strchr(buf, 'N'))
669 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
670 if (strchr(buf, 'P'))
671 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
672 break;
673 case SI_OFFSET:
674 stat_task->offset_seconds = atoi(buf);
675 break;
676 case SI_SECONDS_TOTAL:
677 stat_task->length_seconds = atoi(buf);
678 break;
679 case SI_STREAM_START:
680 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
681 struct timeval a_start, delay;
682 delay.tv_sec = conf.stream_delay_arg / 1000;
683 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
684 stat_task->server_stream_start.tv_sec = sec;
685 stat_task->server_stream_start.tv_usec = usec;
686 if (compute_time_diff(NULL) > 2) {
687 if (stat_task->sa_time_diff_sign < 0)
688 tv_add(&stat_task->server_stream_start,
689 &stat_task->sa_time_diff, &a_start);
690 else
691 tv_diff(&stat_task->server_stream_start,
692 &stat_task->sa_time_diff, &a_start);
693 tv_add(&a_start, &delay, &initial_delay_barrier);
694 }
695 }
696 break;
697 case SI_CURRENT_TIME:
698 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
699 struct timeval tv = {sec, usec};
700 compute_time_diff(&tv);
701 }
702 break;
703 case SI_FORMAT:
704 stat_task->current_audio_format_num
705 = get_audio_format_num(buf);
706 }
707 return 1;
708 }
709
710 static int parse_stream_command(const char *txt, char **cmd)
711 {
712 char *p = strchr(txt, ':');
713 int i;
714
715 if (!p)
716 return -E_MISSING_COLON;
717 p++;
718 FOR_EACH_AUDIO_FORMAT(i) {
719 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
720 continue;
721 *cmd = p;
722 return i;
723 }
724 return -E_UNSUPPORTED_AUDIO_FORMAT;
725 }
726
727 static int add_filter(int format, char *cmdline)
728 {
729 struct audio_format_info *a = &afi[format];
730 int filter_num, nf = a->num_filters;
731
732 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
733 if (filter_num < 0)
734 return filter_num;
735 a->filter_nums[nf] = filter_num;
736 a->num_filters++;
737 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
738 filters[filter_num].name);
739 return filter_num;
740 }
741
742 static int parse_writer_args(void)
743 {
744 int i, ret, nw;
745 char *cmd;
746 struct audio_format_info *a;
747
748 nw = PARA_MAX(1U, conf.writer_given);
749 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
750 FOR_EACH_AUDIO_FORMAT(i) {
751 a = &afi[i];
752 a->writer_conf = para_malloc(nw * sizeof(void *));
753 a->writer_nums = para_malloc(nw * sizeof(int));
754 a->num_writers = 0;
755 }
756 for (i = 0; i < conf.writer_given; i++) {
757 void *wconf;
758 int writer_num;
759 ret = parse_stream_command(conf.writer_arg[i], &cmd);
760 if (ret < 0)
761 goto out;
762 a = &afi[ret];
763 nw = a->num_writers;
764 wconf = check_writer_arg(cmd, &writer_num);
765 if (!wconf) {
766 ret = writer_num;
767 goto out;
768 }
769 a->writer_nums[nw] = writer_num;
770 a->writer_conf[nw] = wconf;
771 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
772 nw, writer_names[writer_num]);
773 a->num_writers++;
774 }
775 ret = 1;
776 out:
777 return ret;
778 }
779
780 static int parse_receiver_args(void)
781 {
782 int i, ret, receiver_num;
783 char *cmd = NULL;
784 struct audio_format_info *a;
785
786 for (i = conf.receiver_given - 1; i >= 0; i--) {
787 char *arg = conf.receiver_arg[i];
788 char *recv_arg = strchr(arg, ':');
789 ret = -E_MISSING_COLON;
790 if (!recv_arg)
791 goto out;
792 *recv_arg = '\0';
793 recv_arg++;
794 ret = get_audio_format_num(arg);
795 if (ret < 0)
796 goto out;
797 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
798 if (!afi[ret].receiver_conf) {
799 ret = -E_RECV_SYNTAX;
800 goto out;
801 }
802 afi[ret].receiver = &receivers[receiver_num];
803 }
804 /* use the first available receiver with no arguments
805 * for those audio formats for which no receiver
806 * was specified
807 */
808 cmd = para_strdup(receivers[0].name);
809 FOR_EACH_AUDIO_FORMAT(i) {
810 a = &afi[i];
811 if (a->receiver_conf)
812 continue;
813 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
814 if (!a->receiver_conf)
815 return -E_RECV_SYNTAX;
816 a->receiver = &receivers[receiver_num];
817 }
818 ret = 1;
819 out:
820 free(cmd);
821 return ret;
822 }
823
824 static int init_default_filters(void)
825 {
826 int i, ret = 1;
827
828 FOR_EACH_AUDIO_FORMAT(i) {
829 struct audio_format_info *a = &afi[i];
830 char *tmp;
831 int j;
832
833 if (a->num_filters)
834 continue; /* no default -- nothing to to */
835 /* add "dec" to audio format name */
836 tmp = make_message("%sdec", audio_formats[i]);
837 for (j = 0; filters[j].name; j++)
838 if (!strcmp(tmp, filters[j].name))
839 break;
840 free(tmp);
841 ret = -E_UNSUPPORTED_FILTER;
842 if (!filters[j].name)
843 goto out;
844 tmp = para_strdup(filters[j].name);
845 ret = add_filter(i, tmp);
846 free(tmp);
847 if (ret < 0)
848 goto out;
849 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
850 filters[j].name);
851 }
852 out:
853 return ret;
854 }
855
856 static int parse_filter_args(void)
857 {
858 int i, ret, nf;
859
860 nf = PARA_MAX(1U, conf.filter_given);
861 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
862 FOR_EACH_AUDIO_FORMAT(i) {
863 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
864 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
865 }
866 if (!conf.no_default_filters_given)
867 return init_default_filters();
868 for (i = 0; i < conf.filter_given; i++) {
869 char *arg = conf.filter_arg[i];
870 char *filter_name = strchr(arg, ':');
871 ret = -E_MISSING_COLON;
872 if (!filter_name)
873 goto out;
874 *filter_name = '\0';
875 filter_name++;
876 ret = get_audio_format_num(arg);
877 if (ret < 0)
878 goto out;
879 ret = add_filter(ret, filter_name);
880 if (ret < 0)
881 goto out;
882 }
883 ret = init_default_filters(); /* use default values for the rest */
884 out:
885 return ret;
886 }
887
888 static int parse_stream_args(void)
889 {
890 int ret;
891
892 ret = parse_receiver_args();
893 if (ret < 0)
894 return ret;
895 ret = parse_filter_args();
896 if (ret < 0)
897 return ret;
898 ret = parse_writer_args();
899 if (ret < 0)
900 return ret;
901 return 1;
902 }
903
904 /* does not unlink socket on errors */
905 static int audiod_get_socket(void)
906 {
907 struct sockaddr_un unix_addr;
908 int ret, fd;
909
910 if (conf.socket_given)
911 socket_name = para_strdup(conf.socket_arg);
912 else {
913 char *hn = para_hostname();
914 socket_name = make_message("/var/paraslash/audiod_socket.%s",
915 hn);
916 free(hn);
917 }
918 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
919 if (conf.force_given)
920 unlink(socket_name);
921 ret = create_local_socket(socket_name, &unix_addr,
922 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
923 if (ret < 0)
924 goto err;
925 fd = ret;
926 if (listen(fd , 5) < 0) {
927 ret = -ERRNO_TO_PARA_ERROR(errno);
928 goto err;
929 }
930 ret = mark_fd_nonblocking(fd);
931 if (ret < 0)
932 goto err;
933 return fd;
934 err:
935 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
936 exit(EXIT_FAILURE);
937 }
938
939 static void signal_pre_select(struct sched *s, struct task *t)
940 {
941 struct signal_task *st = container_of(t, struct signal_task, task);
942 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
943 }
944
945 static void signal_post_select(struct sched *s, struct task *t)
946 {
947 struct signal_task *st = container_of(t, struct signal_task, task);
948
949 if (!FD_ISSET(st->fd, &s->rfds))
950 return;
951
952 st->signum = para_next_signal();
953 switch (st->signum) {
954 case SIGINT:
955 case SIGTERM:
956 case SIGHUP:
957 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
958 clean_exit(EXIT_FAILURE, "caught deadly signal");
959 }
960 }
961
962 static void signal_setup_default(struct signal_task *st)
963 {
964 st->task.pre_select = signal_pre_select;
965 st->task.post_select = signal_post_select;
966 sprintf(st->task.status, "signal task");
967 }
968
969 static void command_pre_select(struct sched *s, struct task *t)
970 {
971 struct command_task *ct = container_of(t, struct command_task, task);
972 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
973 }
974
975 static void command_post_select(struct sched *s, struct task *t)
976 {
977 int ret;
978 struct command_task *ct = container_of(t, struct command_task, task);
979 static struct timeval last_status_dump;
980 struct timeval tmp, delay = {0, 500 * 1000};
981
982 tv_add(&last_status_dump, &delay, &tmp);
983 if (tv_diff(&tmp, now, NULL) < 0) {
984 audiod_status_dump();
985 last_status_dump = *now;
986 }
987
988 if (!FD_ISSET(ct->fd, &s->rfds))
989 return;
990 ret = handle_connect(ct->fd);
991 if (ret < 0)
992 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
993 }
994
995 static void init_command_task(struct command_task *ct)
996 {
997 ct->task.pre_select = command_pre_select;
998 ct->task.post_select = command_post_select;
999 ct->task.error = 0;
1000 ct->fd = audiod_get_socket(); /* doesn't return on errors */
1001 sprintf(ct->task.status, "command task");
1002 }
1003
1004 static void close_stat_pipe(void)
1005 {
1006 if (!stat_task->ct)
1007 return;
1008 client_close(stat_task->ct);
1009 stat_task->ct = NULL;
1010 clear_and_dump_items();
1011 stat_task->length_seconds = 0;
1012 stat_task->offset_seconds = 0;
1013 stat_task->vss_status = 0;
1014 stat_task->current_audio_format_num = -1;
1015 audiod_status_dump();
1016 }
1017
1018 /**
1019 * close the connection to para_server and exit
1020 *
1021 * \param status the exit status which is passed to exit(3)
1022 * \param msg the log message
1023 *
1024 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1025 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1026 * EXIT_FAILURE.
1027 *
1028 * \sa exit(3)
1029 */
1030 void __noreturn clean_exit(int status, const char *msg)
1031 {
1032 PARA_EMERG_LOG("%s\n", msg);
1033 if (socket_name)
1034 unlink(socket_name);
1035 close_stat_pipe();
1036 exit(status);
1037 }
1038
1039 /* avoid busy loop if server is down */
1040 static void set_stat_task_restart_barrier(unsigned seconds)
1041 {
1042 struct timeval delay = {seconds, 0};
1043 tv_add(now, &delay, &stat_task->restart_barrier);
1044 }
1045
1046 static bool try_to_close_slot(int slot_num)
1047 {
1048 struct slot_info *s = &slot[slot_num];
1049 struct audio_format_info *a = afi + s->format;
1050 int i;
1051
1052 if (s->format < 0)
1053 return false;
1054 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
1055 return false;
1056 for (i = 0; i < a->num_filters; i++)
1057 if (s->fns && s->fns[i].task.error != -E_TASK_UNREGISTERED)
1058 return false;
1059 for (i = 0; i < a->num_writers; i++)
1060 if (s->wns && s->wns[i].task.error != -E_TASK_UNREGISTERED)
1061 return false;
1062 PARA_INFO_LOG("closing slot %d\n", slot_num);
1063 close_writers(s);
1064 _close_filters(s);
1065 close_receiver(slot_num);
1066 clear_slot(slot_num);
1067 return true;
1068 }
1069
1070 /*
1071 * Check if any receivers/filters/writers need to be started and do so if
1072 * necessary.
1073 */
1074 static void start_stop_decoders(struct sched *s)
1075 {
1076 int i, ret;
1077 struct slot_info *sl;
1078 struct audio_format_info *a;
1079
1080 FOR_EACH_SLOT(i)
1081 if (try_to_close_slot(i))
1082 sched_min_delay(s);
1083 // if (audiod_status != AUDIOD_ON ||
1084 // !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1085 // return kill_all_decoders(-E_NOT_PLAYING);
1086 ret = open_current_receiver(s);
1087 if (ret < 0)
1088 return;
1089 sl = slot + ret;
1090 a = afi + sl->format;
1091 if (a->num_filters)
1092 open_filters(sl);
1093 open_writers(sl);
1094 activate_grab_clients();
1095 btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1096 sched_min_delay(s);
1097 }
1098
1099 /* restart the client task if necessary */
1100 static void status_pre_select(struct sched *s, struct task *t)
1101 {
1102 struct status_task *st = container_of(t, struct status_task, task);
1103
1104 if (audiod_status == AUDIOD_OFF) {
1105 if (!st->ct)
1106 goto out;
1107 if (st->ct->task.error >= 0) {
1108 st->ct->task.error = -E_AUDIOD_OFF;
1109 goto out;
1110 }
1111 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1112 goto out;
1113 close_stat_pipe();
1114 st->clock_diff_count = conf.clock_diff_count_arg;
1115 goto out;
1116 }
1117 if (st->ct) {
1118 int ret;
1119 if (st->ct->task.error < 0) {
1120 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1121 goto out;
1122 close_stat_pipe();
1123 goto out;
1124 }
1125 if (st->ct->status != CL_RECEIVING)
1126 goto out;
1127 ret = for_each_stat_item(st->ct->buf, st->ct->loaded,
1128 update_item);
1129 if (ret < 0) {
1130 st->ct->task.error = ret;
1131 goto out;
1132 }
1133 if (st->ct->loaded != ret) {
1134 st->last_status_read = *now;
1135 st->ct->loaded = ret;
1136 } else {
1137 struct timeval diff;
1138 tv_diff(now, &st->last_status_read, &diff);
1139 if (diff.tv_sec > 61)
1140 st->ct->task.error = -E_STATUS_TIMEOUT;
1141 }
1142 goto out;
1143 }
1144 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1145 goto out;
1146 if (st->clock_diff_count) { /* get status only one time */
1147 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1148 int argc = 5;
1149 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1150 st->clock_diff_count--;
1151 client_open(argc, argv, &st->ct, NULL);
1152 set_stat_task_restart_barrier(2);
1153 sched_min_delay(s);
1154
1155 } else {
1156 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1157 int argc = 4;
1158 client_open(argc, argv, &st->ct, NULL);
1159 set_stat_task_restart_barrier(5);
1160 sched_min_delay(s);
1161 }
1162 free(stat_item_values[SI_BASENAME]);
1163 stat_item_values[SI_BASENAME] = para_strdup(
1164 "no connection to para_server");
1165 stat_client_write_item(SI_BASENAME);
1166 st->last_status_read = *now;
1167 out:
1168 start_stop_decoders(s);
1169 }
1170
1171 static void init_status_task(struct status_task *st)
1172 {
1173 memset(st, 0, sizeof(struct status_task));
1174 st->task.pre_select = status_pre_select;
1175 st->sa_time_diff_sign = 1;
1176 st->clock_diff_count = conf.clock_diff_count_arg;
1177 st->current_audio_format_num = -1;
1178 sprintf(st->task.status, "status task");
1179 }
1180
1181 static void set_initial_status(void)
1182 {
1183 audiod_status = AUDIOD_ON;
1184 if (!conf.mode_given)
1185 return;
1186 if (!strcmp(conf.mode_arg, "sb")) {
1187 audiod_status = AUDIOD_STANDBY;
1188 return;
1189 }
1190 if (!strcmp(conf.mode_arg, "off")) {
1191 audiod_status = AUDIOD_OFF;
1192 return;
1193 }
1194 if (strcmp(conf.mode_arg, "on"))
1195 PARA_WARNING_LOG("invalid mode\n");
1196 }
1197
1198 __noreturn static void print_help_and_die(void)
1199 {
1200 int d = conf.detailed_help_given;
1201 const char **p = d? audiod_args_info_detailed_help
1202 : audiod_args_info_help;
1203
1204 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1205 AUDIOD_CMDLINE_PARSER_VERSION);
1206 printf_or_die("%s\n\n", audiod_args_info_usage);
1207 for (; *p; p++)
1208 printf_or_die("%s\n", *p);
1209 print_receiver_helps(d);
1210 print_filter_helps(d);
1211 print_writer_helps(d);
1212 exit(0);
1213 }
1214
1215 static void init_colors_or_die(void)
1216 {
1217 int ret, i;
1218
1219 if (!want_colors())
1220 return;
1221 daemon_set_default_log_colors();
1222 daemon_set_flag(DF_COLOR_LOG);
1223 for (i = 0; i < conf.log_color_given; i++) {
1224 ret = daemon_set_log_color(conf.log_color_arg[i]);
1225 if (ret < 0)
1226 exit(EXIT_FAILURE);
1227 }
1228 }
1229
1230 /**
1231 * the main function of para_audiod
1232 *
1233 * \param argc usual argument count
1234 * \param argv usual argument vector
1235 *
1236 * \return EXIT_SUCCESS or EXIT_FAILURE
1237 *
1238 * \sa para_audiod(1)
1239 * */
1240 int main(int argc, char *argv[])
1241 {
1242 int ret, i;
1243 static struct sched s;
1244 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1245 struct audiod_cmdline_parser_params params = {
1246 .override = 0,
1247 .initialize = 1,
1248 .check_required = 0,
1249 .check_ambiguity = 0,
1250 .print_errors = 1
1251 };
1252
1253 valid_fd_012();
1254 if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1255 exit(EXIT_FAILURE);
1256 HANDLE_VERSION_FLAG("audiod", conf);
1257 /* init receivers/filters/writers early to make help work */
1258 recv_init();
1259 filter_init();
1260 writer_init();
1261 if (conf.help_given || conf.detailed_help_given)
1262 print_help_and_die();
1263 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1264 parse_config_or_die();
1265 init_colors_or_die();
1266 init_random_seed_or_die();
1267 daemon_set_flag(DF_LOG_TIME);
1268 daemon_set_flag(DF_LOG_HOSTNAME);
1269 daemon_set_flag(DF_LOG_LL);
1270 if (conf.log_timing_given)
1271 daemon_set_flag(DF_LOG_TIMING);
1272 if (conf.logfile_given) {
1273 daemon_set_logfile(conf.logfile_arg);
1274 daemon_open_log_or_die();
1275 }
1276 ret = parse_stream_args();
1277 if (ret < 0) {
1278 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1279 exit(EXIT_FAILURE);
1280 }
1281 log_welcome("para_audiod");
1282 server_uptime(UPTIME_SET);
1283 set_initial_status();
1284 FOR_EACH_SLOT(i)
1285 clear_slot(i);
1286 setup_signal_handling();
1287 signal_setup_default(sig_task);
1288
1289 init_status_task(stat_task);
1290 init_command_task(cmd_task);
1291
1292 if (conf.daemon_given)
1293 daemonize();
1294
1295 register_task(&sig_task->task);
1296 register_task(&cmd_task->task);
1297 register_task(&stat_task->task);
1298 s.default_timeout.tv_sec = 2;
1299 s.default_timeout.tv_usec = 999 * 1000;
1300 ret = schedule(&s);
1301
1302 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1303 return EXIT_FAILURE;
1304 }