Fix config file handling for audiod and clean up init functions.
[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 <sys/types.h>
9 #include <dirent.h>
10 #include <signal.h>
11
12 #include "para.h"
13 #include "error.h"
14 #include "audiod.cmdline.h"
15 #include "list.h"
16 #include "sched.h"
17 #include "ggo.h"
18 #include "recv.h"
19 #include "filter.h"
20 #include "grab_client.cmdline.h"
21 #include "grab_client.h"
22 #include "client.cmdline.h"
23 #include "client.h"
24 #include "audiod.h"
25 #include "net.h"
26 #include "daemon.h"
27 #include "string.h"
28 #include "fd.h"
29 #include "write.h"
30 #include "write_common.h"
31 #include "signal.h"
32
33 /** define the array of error lists needed by para_audiod */
34 INIT_AUDIOD_ERRLISTS;
35 /** define the array containing all supported audio formats */
36 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
37
38 /** Defines how audiod handles one supported audio format. */
39 struct audio_format_info {
40 /** pointer to the receiver for this audio format */
41 struct receiver *receiver;
42 /** the receiver configuration */
43 void *receiver_conf;
44 /** the number of filters that should be activated for this audio format */
45 unsigned int num_filters;
46 /** Array of filter numbers to be activated. */
47 unsigned *filter_nums;
48 /** Pointer to the array of filter configurations. */
49 void **filter_conf;
50 /** the number of filters that should be activated for this audio format */
51 unsigned int num_writers;
52 /** pointer to the array of writers to be activated */
53 struct writer **writers;
54 /** pointer to the array of writer configurations */
55 void **writer_conf;
56 /** do not start receiver/filters/writer before this time */
57 struct timeval restart_barrier;
58 };
59
60 /**
61 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
62 * be associated with a receiver/filter/writer triple. This array holds all
63 * information on the status of these slots.
64 *
65 * \sa struct slot_info
66 * */
67 struct slot_info slot[MAX_STREAM_SLOTS];
68
69
70 /** The array of status items sent by para_server. */
71 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
72
73 /**
74 * the current mode of operation of which can be changed by the on/off/cycle
75 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
76 */
77 int audiod_status = AUDIOD_ON;
78
79 /**
80 * the gengetopt args_info struct that holds information on all command line
81 * arguments
82 */
83 struct audiod_args_info conf;
84
85 static char *socket_name;
86 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
87
88 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
89
90 static struct status_task status_task_struct;
91
92 /**
93 * the task that calls the status command of para_server
94 *
95 * \sa struct status_task
96 */
97 static struct status_task *stat_task = &status_task_struct;
98 static struct timeval initial_delay_barrier;
99
100 /**
101 * the task for handling audiod commands
102 *
103 * \sa struct task, struct sched
104 */
105 struct command_task {
106 /** the local listening socket */
107 int fd;
108 /** the associated task structure */
109 struct task task;
110 };
111
112 /** iterate over all supported audio formats */
113 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
114
115 /**
116 * get the audio format number
117 * \param name the name of the audio format
118 *
119 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
120 * \a name is not a supported audio format.
121 */
122 int get_audio_format_num(char *name)
123 {
124 int i;
125
126 while (para_isspace(*name))
127 name++;
128 FOR_EACH_AUDIO_FORMAT(i)
129 if (!strcmp(name, audio_formats[i]))
130 return i;
131 return -E_UNSUPPORTED_AUDIO_FORMAT;
132 }
133
134 char *get_time_string(struct timeval *newest_stime)
135 {
136 struct timeval diff, adj_stream_start, tmp;
137 int total = 0, use_server_time = 1,
138 length_seconds = stat_task->length_seconds;
139
140 if (!stat_task->playing) {
141 if (length_seconds)
142 return NULL;
143 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
144 }
145 if (audiod_status == AUDIOD_OFF)
146 goto out;
147 if (stat_task->sa_time_diff_sign > 0)
148 tv_diff(&stat_task->server_stream_start, &stat_task->sa_time_diff,
149 &adj_stream_start);
150 else
151 tv_add(&stat_task->server_stream_start, &stat_task->sa_time_diff,
152 &adj_stream_start);
153 tmp = adj_stream_start;
154 if (newest_stime && audiod_status == AUDIOD_ON) {
155 tv_diff(newest_stime, &adj_stream_start, &diff);
156 if (tv2ms(&diff) < 5000) {
157 tmp = *newest_stime;
158 use_server_time = 0;
159 }
160 }
161 tv_diff(now, &tmp, &diff);
162 total = diff.tv_sec + stat_task->offset_seconds;
163 if (total > length_seconds)
164 total = length_seconds;
165 if (total < 0)
166 total = 0;
167 out:
168 return make_message(
169 "%s: %s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
170 status_item_list[SI_PLAY_TIME],
171 use_server_time? "~" : "",
172 total / 60,
173 total % 60,
174 (length_seconds - total) / 60,
175 (length_seconds - total) % 60,
176 length_seconds? (total * 100 + length_seconds / 2) /
177 length_seconds : 0,
178 length_seconds / 60,
179 length_seconds % 60
180 );
181 }
182
183 static int want_colors(void)
184 {
185 if (conf.color_arg == color_arg_no)
186 return 0;
187 if (conf.color_arg == color_arg_yes)
188 return 1;
189 if (conf.logfile_given)
190 return 0;
191 return isatty(STDERR_FILENO);
192 }
193
194 static void parse_config_or_die(void)
195 {
196 int ret;
197 char *config_file;
198 struct audiod_cmdline_parser_params params = {
199 .override = 0,
200 .initialize = 0,
201 .check_required = 1,
202 .check_ambiguity = 0,
203 .print_errors = 1
204 };
205
206 if (conf.config_file_given)
207 config_file = para_strdup(conf.config_file_arg);
208 else {
209 char *home = para_homedir();
210 config_file = make_message("%s/.paraslash/audiod.conf", home);
211 free(home);
212 }
213 ret = file_exists(config_file);
214 if (conf.config_file_given && !ret) {
215 PARA_EMERG_LOG("can not read config file %s\n", config_file);
216 goto err;
217 }
218 if (ret)
219 audiod_cmdline_parser_config_file(config_file, &conf, &params);
220 free(config_file);
221 daemon_set_loglevel(conf.loglevel_arg);
222 return;
223 err:
224 free(config_file);
225 exit(EXIT_FAILURE);
226 }
227
228 static void setup_signal_handling(void)
229 {
230 sig_task->fd = para_signal_init();
231 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
232 para_install_sighandler(SIGINT);
233 para_install_sighandler(SIGTERM);
234 para_install_sighandler(SIGHUP);
235 signal(SIGPIPE, SIG_IGN);
236 }
237
238 static void clear_slot(int slot_num)
239 {
240 struct slot_info *s = &slot[slot_num];
241
242 PARA_INFO_LOG("clearing slot %d\n", slot_num);
243 memset(s, 0, sizeof(struct slot_info));
244 s->format = -1;
245 }
246
247 static void close_receiver(int slot_num)
248 {
249 struct slot_info *s = &slot[slot_num];
250 struct audio_format_info *a;
251
252 if (s->format < 0 || !s->receiver_node)
253 return;
254 a = &afi[s->format];
255 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
256 audio_formats[s->format], slot_num);
257 a->receiver->close(s->receiver_node);
258 free(s->receiver_node);
259 s->receiver_node = NULL;
260 }
261
262 static void kill_all_decoders(int error)
263 {
264 int i;
265
266 FOR_EACH_SLOT(i) {
267 struct slot_info *s = &slot[i];
268 if (s->wng && s->wng->task.error >= 0) {
269 PARA_INFO_LOG("deactivating wng in slot %d\n",
270 i);
271 s->wng->task.error = error;
272 }
273 if (s->fc && s->fc->task.error >= 0) {
274 PARA_INFO_LOG("deactivatimg filter chain in slot %d\n", i);
275 s->fc->task.error = error;
276 }
277 if (s->receiver_node && s->receiver_node->task.error >= 0) {
278 PARA_INFO_LOG("deactivating receiver_node in slot %d\n", i);
279 s->receiver_node->task.error = error;
280 }
281 }
282 }
283
284 static int get_empty_slot(void)
285 {
286 int i;
287 struct slot_info *s;
288
289 FOR_EACH_SLOT(i) {
290 s = &slot[i];
291 if (s->format < 0) {
292 clear_slot(i);
293 return i;
294 }
295 if (s->wng || s->receiver_node || s->fc)
296 continue;
297 clear_slot(i);
298 return i;
299 }
300 return -E_NO_MORE_SLOTS;
301 }
302
303 /**
304 * get the number of filters
305 *
306 * \param audio_format_num the number identifying the audio format
307 *
308 * \return the number of filters for the given audio format
309 *
310 * \sa struct filter;
311 */
312 int num_filters(int audio_format_num)
313 {
314 return afi[audio_format_num].num_filters;
315 }
316
317 static void open_filters(int slot_num)
318 {
319 struct slot_info *s = &slot[slot_num];
320 struct audio_format_info *a = &afi[s->format];
321 struct filter_node *fn;
322 int nf = a->num_filters;
323 int i;
324
325 s->fc = NULL;
326 if (!nf)
327 return;
328 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
329 s->fc = para_calloc(sizeof(struct filter_chain));
330 s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_node));
331 s->fc->inbuf = s->receiver_node->buf;
332 s->fc->in_loaded = &s->receiver_node->loaded;
333 s->fc->input_error = &s->receiver_node->task.error;
334 s->fc->task.pre_select = filter_pre_select;
335 s->fc->task.post_select = NULL;
336 s->fc->task.error = 0;
337 s->fc->num_filters = nf;
338
339 s->receiver_node->output_error = &s->fc->task.error;
340 sprintf(s->fc->task.status, "filter chain");
341 FOR_EACH_FILTER_NODE(fn, s->fc, i) {
342 struct filter *f = filters + a->filter_nums[i];
343 fn->filter_num = a->filter_nums[i];
344 fn->conf = a->filter_conf[i];
345 fn->fc = s->fc;
346 fn->loaded = 0;
347 INIT_LIST_HEAD(&fn->callbacks);
348 f->open(fn);
349 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
350 audio_formats[s->format], i, nf, f->name, slot_num);
351 s->fc->outbuf = fn->buf;
352 s->fc->out_loaded = &fn->loaded;
353 }
354 register_task(&s->fc->task);
355 }
356
357 static void open_writers(int slot_num)
358 {
359 int ret, i;
360 struct slot_info *s = &slot[slot_num];
361 struct audio_format_info *a = &afi[s->format];
362
363 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
364 if (!a->num_writers)
365 s->wng = setup_default_wng();
366 else
367 s->wng = wng_new(a->num_writers);
368 if (s->fc) {
369 s->wng->buf = s->fc->outbuf;
370 s->wng->loaded = s->fc->out_loaded;
371 s->wng->input_error = &s->fc->task.error;
372 s->wng->channels = &s->fc->channels;
373 s->wng->samplerate = &s->fc->samplerate;
374 s->fc->output_error = &s->wng->task.error;
375 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
376 } else {
377 s->wng->buf = s->receiver_node->buf;
378 s->wng->loaded = &s->receiver_node->loaded;
379 s->wng->input_error = &s->receiver_node->task.error;
380 }
381 for (i = 0; i < a->num_writers; i++) {
382 s->wng->writer_nodes[i].conf = a->writer_conf[i];
383 s->wng->writer_nodes[i].writer = a->writers[i];
384 }
385 ret = wng_open(s->wng);
386 if (ret < 0) {
387 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
388 return;
389 }
390 s->wstime = *now;
391 activate_inactive_grab_clients(slot_num, s->format, s->fc);
392 }
393
394 static int open_receiver(int format)
395 {
396 struct audio_format_info *a = &afi[format];
397 struct slot_info *s;
398 int ret, slot_num;
399 struct receiver_node *rn;
400 const struct timeval restart_delay = {2, 0};
401
402 ret = get_empty_slot();
403 if (ret < 0)
404 goto err;
405 slot_num = ret;
406 s = &slot[slot_num];
407 s->format = format;
408 s->receiver_node = para_calloc(sizeof(struct receiver_node));
409 rn = s->receiver_node;
410 rn->receiver = a->receiver;
411 rn->conf = a->receiver_conf;
412 ret = a->receiver->open(s->receiver_node);
413 if (ret < 0) {
414 free(s->receiver_node);
415 s->receiver_node = NULL;
416 goto err;
417 }
418 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
419 audio_formats[s->format], a->receiver->name, slot_num);
420 rn->task.pre_select = a->receiver->pre_select;
421 rn->task.post_select = a->receiver->post_select;
422 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
423 register_task(&rn->task);
424 ret = 1;
425 err:
426 if (ret < 0)
427 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
428 tv_add(now, &restart_delay, &afi[format].restart_barrier);
429 return ret;
430 }
431
432 static int receiver_running(int format)
433 {
434 int i;
435
436 FOR_EACH_SLOT(i) {
437 struct slot_info *s = &slot[i];
438 if (s->format == format && s->receiver_node)
439 return 1;
440 }
441 return 0;
442 }
443
444 static int open_current_receiver(struct sched *s)
445 {
446 struct timeval diff;
447 int cafn = stat_task->current_audio_format_num;
448
449 if (cafn < 0 || !stat_task->ct)
450 return 0;
451 if (receiver_running(cafn))
452 return 0;
453 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
454 s->timeout = diff;
455 return 0;
456 }
457 return open_receiver(cafn) < 0? 0 : 1;
458 }
459
460 static unsigned compute_time_diff(const struct timeval *status_time)
461 {
462 struct timeval tmp, diff;
463 static unsigned count;
464 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
465 const struct timeval max_deviation = {0, 500 * 1000};
466 const int time_smooth = 5;
467
468 if (!status_time)
469 return count;
470 sign = tv_diff(status_time, now, &diff);
471 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
472 // sign, sa_time_diff_sign);
473 if (!count) {
474 sa_time_diff_sign = sign;
475 stat_task->sa_time_diff = diff;
476 count++;
477 goto out;
478 }
479 if (count > 5) {
480 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
481 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
482 PARA_WARNING_LOG("time diff jump: %lims\n",
483 s * tv2ms(&tmp));
484 }
485 count++;
486 sa_time_diff_sign = tv_convex_combination(
487 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
488 count > 10? sign : sign * time_smooth, &diff,
489 &tmp);
490 stat_task->sa_time_diff = tmp;
491 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
492 sign > 0? "+" : "-",
493 tv2ms(&diff),
494 sa_time_diff_sign ? "+" : "-",
495 tv2ms(&stat_task->sa_time_diff)
496 );
497 out:
498 stat_task->sa_time_diff_sign = sa_time_diff_sign;
499 return count;
500 }
501
502 static int check_stat_line(char *line, __a_unused void *data)
503 {
504 int itemnum;
505 size_t ilen = 0;
506 long unsigned sec, usec;
507 char *tmp;
508
509 //PARA_INFO_LOG("line: %s\n", line);
510 if (!line)
511 return 1;
512 itemnum = stat_line_valid(line);
513 if (itemnum < 0) {
514 PARA_WARNING_LOG("invalid status line: %s\n", line);
515 return 1;
516 }
517 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
518 return 1;
519 tmp = make_message("%s\n", line);
520 stat_client_write(tmp, itemnum);
521 free(tmp);
522 free(stat_item_values[itemnum]);
523 stat_item_values[itemnum] = para_strdup(line);
524 ilen = strlen(status_item_list[itemnum]);
525 switch (itemnum) {
526 case SI_STATUS:
527 stat_task->playing = strstr(line, "playing")? 1 : 0;
528 PARA_INFO_LOG("stat task playing: %d\n", stat_task->playing);
529 break;
530 case SI_OFFSET:
531 stat_task->offset_seconds = atoi(line + ilen + 1);
532 break;
533 case SI_SECONDS_TOTAL:
534 stat_task->length_seconds = atoi(line + ilen + 1);
535 break;
536 case SI_STREAM_START:
537 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
538 struct timeval a_start, delay;
539 delay.tv_sec = conf.stream_delay_arg / 1000;
540 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
541 stat_task->server_stream_start.tv_sec = sec;
542 stat_task->server_stream_start.tv_usec = usec;
543 if (compute_time_diff(NULL) > 2) {
544 if (stat_task->sa_time_diff_sign < 0)
545 tv_add(&stat_task->server_stream_start,
546 &stat_task->sa_time_diff, &a_start);
547 else
548 tv_diff(&stat_task->server_stream_start,
549 &stat_task->sa_time_diff, &a_start);
550 tv_add(&a_start, &delay, &initial_delay_barrier);
551 }
552 }
553 break;
554 case SI_CURRENT_TIME:
555 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
556 struct timeval tv = {sec, usec};
557 compute_time_diff(&tv);
558 }
559 break;
560 case SI_FORMAT:
561 stat_task->current_audio_format_num = get_audio_format_num(
562 line + ilen + 1);
563 }
564 return 1;
565 }
566
567 static int parse_stream_command(const char *txt, char **cmd)
568 {
569 char *p = strchr(txt, ':');
570 int i;
571
572 if (!p)
573 return -E_MISSING_COLON;
574 p++;
575 FOR_EACH_AUDIO_FORMAT(i) {
576 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
577 continue;
578 *cmd = p;
579 return i;
580 }
581 return -E_UNSUPPORTED_AUDIO_FORMAT;
582 }
583
584 static int add_filter(int format, char *cmdline)
585 {
586 struct audio_format_info *a = &afi[format];
587 int filter_num, nf = a->num_filters;
588
589 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
590 if (filter_num < 0)
591 return filter_num;
592 a->filter_nums[nf] = filter_num;
593 a->num_filters++;
594 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
595 filters[filter_num].name);
596 return filter_num;
597 }
598
599 static int parse_writer_args(void)
600 {
601 int i, ret, nw;
602 char *cmd;
603 struct audio_format_info *a;
604
605 nw = PARA_MAX(1U, conf.writer_given);
606 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
607 FOR_EACH_AUDIO_FORMAT(i) {
608 a = &afi[i];
609 a->writer_conf = para_malloc(nw * sizeof(void *));
610 a->writers = para_malloc(nw * sizeof(struct writer *));
611 a->num_writers = 0;
612 }
613 for (i = 0; i < conf.writer_given; i++) {
614 void *wconf;
615 int writer_num;
616 ret = parse_stream_command(conf.writer_arg[i], &cmd);
617 if (ret < 0)
618 goto out;
619 a = &afi[ret];
620 nw = a->num_writers;
621 wconf = check_writer_arg(cmd, &writer_num);
622 if (!wconf) {
623 ret = writer_num;
624 goto out;
625 }
626 a->writers[nw] = &writers[writer_num];
627 a->writer_conf[nw] = wconf;
628 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
629 nw, writer_names[writer_num]);
630 a->num_writers++;
631 }
632 ret = 1;
633 out:
634 return ret;
635 }
636
637 static int parse_receiver_args(void)
638 {
639 int i, ret, receiver_num;
640 char *cmd = NULL;
641 struct audio_format_info *a;
642
643 for (i = conf.receiver_given - 1; i >= 0; i--) {
644 char *arg = conf.receiver_arg[i];
645 char *recv_arg = strchr(arg, ':');
646 ret = -E_MISSING_COLON;
647 if (!recv_arg)
648 goto out;
649 *recv_arg = '\0';
650 recv_arg++;
651 ret = get_audio_format_num(arg);
652 if (ret < 0)
653 goto out;
654 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
655 if (!afi[ret].receiver_conf) {
656 ret = -E_RECV_SYNTAX;
657 goto out;
658 }
659 afi[ret].receiver = &receivers[receiver_num];
660 }
661 /* use the first available receiver with no arguments
662 * for those audio formats for which no receiver
663 * was specified
664 */
665 cmd = para_strdup(receivers[0].name);
666 FOR_EACH_AUDIO_FORMAT(i) {
667 a = &afi[i];
668 if (a->receiver_conf)
669 continue;
670 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
671 if (!a->receiver_conf)
672 return -E_RECV_SYNTAX;
673 a->receiver = &receivers[receiver_num];
674 }
675 ret = 1;
676 out:
677 free(cmd);
678 return ret;
679 }
680
681 static int init_default_filters(void)
682 {
683 int i, ret = 1;
684
685 FOR_EACH_AUDIO_FORMAT(i) {
686 struct audio_format_info *a = &afi[i];
687 char *tmp;
688 int j;
689
690 if (a->num_filters)
691 continue; /* no default -- nothing to to */
692 /* add "dec" to audio format name */
693 tmp = make_message("%sdec", audio_formats[i]);
694 for (j = 0; filters[j].name; j++)
695 if (!strcmp(tmp, filters[j].name))
696 break;
697 free(tmp);
698 ret = -E_UNSUPPORTED_FILTER;
699 if (!filters[j].name)
700 goto out;
701 tmp = para_strdup(filters[j].name);
702 ret = add_filter(i, tmp);
703 free(tmp);
704 if (ret < 0)
705 goto out;
706 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
707 filters[j].name);
708 }
709 out:
710 return ret;
711 }
712
713 static int parse_filter_args(void)
714 {
715 int i, ret, nf;
716
717 nf = PARA_MAX(1U, conf.filter_given);
718 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
719 FOR_EACH_AUDIO_FORMAT(i) {
720 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
721 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
722 }
723 if (!conf.no_default_filters_given)
724 return init_default_filters();
725 for (i = 0; i < conf.filter_given; i++) {
726 char *arg = conf.filter_arg[i];
727 char *filter_name = strchr(arg, ':');
728 ret = -E_MISSING_COLON;
729 if (!filter_name)
730 goto out;
731 *filter_name = '\0';
732 filter_name++;
733 ret = get_audio_format_num(arg);
734 if (ret < 0)
735 goto out;
736 ret = add_filter(ret, filter_name);
737 if (ret < 0)
738 goto out;
739 }
740 ret = init_default_filters(); /* use default values for the rest */
741 out:
742 return ret;
743 }
744
745 static int parse_stream_args(void)
746 {
747 int ret;
748
749 ret = parse_receiver_args();
750 if (ret < 0)
751 return ret;
752 ret = parse_filter_args();
753 if (ret < 0)
754 return ret;
755 ret = parse_writer_args();
756 if (ret < 0)
757 return ret;
758 return 1;
759 }
760
761 /* does not unlink socket on errors */
762 static int audiod_get_socket(void)
763 {
764 struct sockaddr_un unix_addr;
765 int ret, fd;
766
767 if (conf.socket_given)
768 socket_name = para_strdup(conf.socket_arg);
769 else {
770 char *hn = para_hostname();
771 socket_name = make_message("/var/paraslash/audiod_socket.%s",
772 hn);
773 free(hn);
774 }
775 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
776 if (conf.force_given)
777 unlink(socket_name);
778 ret = create_local_socket(socket_name, &unix_addr,
779 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
780 if (ret < 0)
781 goto err;
782 fd = ret;
783 if (listen(fd , 5) < 0) {
784 ret = -ERRNO_TO_PARA_ERROR(errno);
785 goto err;
786 }
787 ret = mark_fd_nonblocking(fd);
788 if (ret < 0)
789 goto err;
790 return fd;
791 err:
792 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
793 exit(EXIT_FAILURE);
794 }
795
796 static void signal_pre_select(struct sched *s, struct task *t)
797 {
798 struct signal_task *st = container_of(t, struct signal_task, task);
799 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
800 }
801
802 static void signal_post_select(struct sched *s, struct task *t)
803 {
804 struct signal_task *st = container_of(t, struct signal_task, task);
805
806 if (!FD_ISSET(st->fd, &s->rfds))
807 return;
808
809 st->signum = para_next_signal();
810 switch (st->signum) {
811 case SIGINT:
812 case SIGTERM:
813 case SIGHUP:
814 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
815 clean_exit(EXIT_FAILURE, "caught deadly signal");
816 }
817 }
818
819 static void signal_setup_default(struct signal_task *st)
820 {
821 st->task.pre_select = signal_pre_select;
822 st->task.post_select = signal_post_select;
823 sprintf(st->task.status, "signal task");
824 }
825
826 static void command_pre_select(struct sched *s, struct task *t)
827 {
828 struct command_task *ct = container_of(t, struct command_task, task);
829 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
830 }
831
832 static void command_post_select(struct sched *s, struct task *t)
833 {
834 int ret;
835 struct command_task *ct = container_of(t, struct command_task, task);
836
837 audiod_status_dump();
838 if (!FD_ISSET(ct->fd, &s->rfds))
839 return;
840 ret = handle_connect(ct->fd);
841 if (ret < 0)
842 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
843 }
844
845 static void init_command_task(struct command_task *ct)
846 {
847 ct->task.pre_select = command_pre_select;
848 ct->task.post_select = command_post_select;
849 ct->task.error = 0;
850 ct->fd = audiod_get_socket(); /* doesn't return on errors */
851 sprintf(ct->task.status, "command task");
852 }
853
854 static void close_stat_pipe(void)
855 {
856 int i;
857
858 if (!stat_task->ct)
859 return;
860 client_close(stat_task->ct);
861 stat_task->ct = NULL;
862 FOR_EACH_STATUS_ITEM(i) {
863 free(stat_item_values[i]);
864 stat_item_values[i] = NULL;
865 }
866 dump_empty_status();
867 stat_task->length_seconds = 0;
868 stat_task->offset_seconds = 0;
869 audiod_status_dump();
870 stat_task->playing = 0;
871 }
872
873 /**
874 * close the connection to para_server and exit
875 *
876 * \param status the exit status which is passed to exit(3)
877 * \param msg the log message
878 *
879 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
880 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
881 * EXIT_FAILURE.
882 *
883 * \sa exit(3)
884 */
885 void __noreturn clean_exit(int status, const char *msg)
886 {
887 PARA_EMERG_LOG("%s\n", msg);
888 if (socket_name)
889 unlink(socket_name);
890 close_stat_pipe();
891 exit(status);
892 }
893
894 /* avoid busy loop if server is down */
895 static void set_stat_task_restart_barrier(unsigned seconds)
896 {
897 struct timeval delay = {seconds, 0};
898 tv_add(now, &delay, &stat_task->restart_barrier);
899 }
900
901 static void try_to_close_slot(int slot_num)
902 {
903 struct slot_info *s = &slot[slot_num];
904
905 if (s->format < 0)
906 return;
907 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
908 return;
909 if (s->fc && s->fc->task.error != -E_TASK_UNREGISTERED)
910 return;
911 if (s->wng && s->wng->task.error != -E_TASK_UNREGISTERED)
912 return;
913 PARA_INFO_LOG("closing slot %d\n", slot_num);
914 wng_close(s->wng);
915 close_filters(s->fc);
916 free(s->fc);
917 close_receiver(slot_num);
918 clear_slot(slot_num);
919 }
920
921 /*
922 * Check if any receivers/filters/writers need to be started and do so if
923 * necessary.
924 */
925 static void start_stop_decoders(struct sched *s)
926 {
927 int i;
928
929 FOR_EACH_SLOT(i)
930 try_to_close_slot(i);
931 if (audiod_status != AUDIOD_ON || !stat_task->playing)
932 return kill_all_decoders(-E_NOT_PLAYING);
933 open_current_receiver(s);
934 FOR_EACH_SLOT(i) {
935 struct slot_info *sl = &slot[i];
936 struct audio_format_info *a;
937 struct timeval diff;
938
939 if (sl->format < 0)
940 continue;
941 a = &afi[sl->format];
942 if (!sl->receiver_node)
943 continue;
944 if ((!a->num_filters || sl->fc) && sl->wng)
945 continue; /* everything already started */
946 if (!a->num_filters) {
947 if (sl->receiver_node->loaded && !sl->wng) {
948 open_writers(i);
949 }
950 continue;
951 }
952 if (sl->receiver_node->loaded && !sl->fc) {
953 open_filters(i);
954 continue;
955 }
956 if (sl->wng || !sl->fc || !*sl->fc->out_loaded)
957 continue;
958 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
959 open_writers(i);
960 continue;
961 }
962 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
963 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
964 s->timeout = diff;
965 }
966 }
967 }
968
969
970 /* restart the client task if necessary */
971 static void status_pre_select(struct sched *s, struct task *t)
972 {
973 struct status_task *st = container_of(t, struct status_task, task);
974
975 if (audiod_status == AUDIOD_OFF) {
976 if (!st->ct)
977 goto out;
978 if (st->ct->task.error >= 0) {
979 st->ct->task.error = -E_AUDIOD_OFF;
980 goto out;
981 }
982 if (st->ct->task.error != -E_TASK_UNREGISTERED)
983 goto out;
984 close_stat_pipe();
985 st->clock_diff_count = conf.clock_diff_count_arg;
986 goto out;
987 }
988 if (st->ct) {
989 unsigned bytes_left;
990 if (st->ct->task.error < 0) {
991 if (st->ct->task.error != -E_TASK_UNREGISTERED)
992 goto out;
993 close_stat_pipe();
994 goto out;
995 }
996 if (st->ct->status != CL_RECEIVING)
997 goto out;
998 bytes_left = for_each_line(st->ct->buf, st->ct->loaded,
999 &check_stat_line, NULL);
1000 if (st->ct->loaded != bytes_left) {
1001 st->last_status_read = *now;
1002 st->ct->loaded = bytes_left;
1003 } else {
1004 struct timeval diff;
1005 tv_diff(now, &st->last_status_read, &diff);
1006 if (diff.tv_sec > 61)
1007 st->ct->task.error = -E_STATUS_TIMEOUT;
1008 }
1009 goto out;
1010 }
1011 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1012 goto out;
1013 if (st->clock_diff_count) { /* get status only one time */
1014 char *argv[] = {"audiod", "stat", "1", NULL};
1015 int argc = 3;
1016 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1017 st->clock_diff_count--;
1018 client_open(argc, argv, &st->ct, NULL);
1019 set_stat_task_restart_barrier(2);
1020
1021 } else {
1022 char *argv[] = {"audiod", "stat", NULL};
1023 int argc = 2;
1024 client_open(argc, argv, &st->ct, NULL);
1025 set_stat_task_restart_barrier(5);
1026 }
1027 free(stat_item_values[SI_BASENAME]);
1028 stat_item_values[SI_BASENAME] = make_message(
1029 "%s: no connection to para_server\n",
1030 status_item_list[SI_BASENAME]);
1031 stat_client_write(stat_item_values[SI_BASENAME],
1032 SI_BASENAME);
1033 st->last_status_read = *now;
1034 out:
1035 start_stop_decoders(s);
1036 }
1037
1038 static void init_status_task(struct status_task *st)
1039 {
1040 memset(st, 0, sizeof(struct status_task));
1041 st->task.pre_select = status_pre_select;
1042 st->sa_time_diff_sign = 1;
1043 st->clock_diff_count = conf.clock_diff_count_arg;
1044 st->current_audio_format_num = -1;
1045 sprintf(st->task.status, "status task");
1046 }
1047
1048 static void set_initial_status(void)
1049 {
1050 audiod_status = AUDIOD_ON;
1051 if (!conf.mode_given)
1052 return;
1053 if (!strcmp(conf.mode_arg, "sb")) {
1054 audiod_status = AUDIOD_STANDBY;
1055 return;
1056 }
1057 if (!strcmp(conf.mode_arg, "off")) {
1058 audiod_status = AUDIOD_OFF;
1059 return;
1060 }
1061 if (strcmp(conf.mode_arg, "on"))
1062 PARA_WARNING_LOG("invalid mode\n");
1063 }
1064
1065 __noreturn static void print_help_and_die(void)
1066 {
1067 int d = conf.detailed_help_given;
1068 const char **p = d? audiod_args_info_detailed_help
1069 : audiod_args_info_help;
1070
1071 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1072 AUDIOD_CMDLINE_PARSER_VERSION);
1073 printf_or_die("%s\n\n", audiod_args_info_usage);
1074 for (; *p; p++)
1075 printf_or_die("%s\n", *p);
1076 print_receiver_helps(d);
1077 print_filter_helps(d);
1078 print_writer_helps(d);
1079 exit(0);
1080 }
1081
1082 static void init_colors_or_die(void)
1083 {
1084 int ret, i;
1085
1086 if (!want_colors())
1087 return;
1088 daemon_set_default_log_colors();
1089 daemon_set_flag(DF_COLOR_LOG);
1090 for (i = 0; i < conf.log_color_given; i++) {
1091 ret = daemon_set_log_color(conf.log_color_arg[i]);
1092 if (ret < 0)
1093 exit(EXIT_FAILURE);
1094 }
1095 }
1096
1097 /**
1098 * the main function of para_audiod
1099 *
1100 * \param argc usual argument count
1101 * \param argv usual argument vector
1102 *
1103 * \return EXIT_SUCCESS or EXIT_FAILURE
1104 *
1105 * \sa para_audiod(1)
1106 * */
1107 int main(int argc, char *argv[])
1108 {
1109 int ret, i;
1110 static struct sched s;
1111 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1112 struct audiod_cmdline_parser_params params = {
1113 .override = 0,
1114 .initialize = 1,
1115 .check_required = 0,
1116 .check_ambiguity = 0,
1117 .print_errors = 1
1118 };
1119
1120 valid_fd_012();
1121 if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1122 exit(EXIT_FAILURE);
1123 HANDLE_VERSION_FLAG("audiod", conf);
1124 /* init receivers/filters/writers early to make help work */
1125 recv_init();
1126 filter_init();
1127 writer_init();
1128 if (conf.help_given || conf.detailed_help_given)
1129 print_help_and_die();
1130 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1131 parse_config_or_die();
1132 init_colors_or_die();
1133 daemon_set_flag(DF_LOG_TIME);
1134 daemon_set_flag(DF_LOG_HOSTNAME);
1135 daemon_set_flag(DF_LOG_LL);
1136 if (conf.logfile_given) {
1137 daemon_set_logfile(conf.logfile_arg);
1138 daemon_open_log_or_die();
1139 }
1140 ret = parse_stream_args();
1141 if (ret < 0) {
1142 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1143 exit(EXIT_FAILURE);
1144 }
1145 log_welcome("para_audiod");
1146 server_uptime(UPTIME_SET);
1147 set_initial_status();
1148 FOR_EACH_SLOT(i)
1149 clear_slot(i);
1150 init_grabbing();
1151 setup_signal_handling();
1152 signal_setup_default(sig_task);
1153
1154 init_status_task(stat_task);
1155 init_command_task(cmd_task);
1156
1157 if (conf.daemon_given)
1158 daemonize();
1159
1160 register_task(&sig_task->task);
1161 register_task(&cmd_task->task);
1162 register_task(&stat_task->task);
1163 s.default_timeout.tv_sec = 0;
1164 s.default_timeout.tv_usec = 99 * 1000;
1165 ret = schedule(&s);
1166
1167 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1168 return EXIT_FAILURE;
1169 }