audiod clean_exit(): Only check status fd once
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file audiod.c the paraslash's audio daemon */
20
21 #include "para.h"
22
23 #include "audiod.cmdline.h"
24 #include "list.h"
25 #include "close_on_fork.h"
26 #include "sched.h"
27 #include "recv.h"
28 #include "filter.h"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
31
32 #include "error.h"
33 #include "audiod.h"
34 #include "net.h"
35 #include "daemon.h"
36 #include "string.h"
37 #include "fd.h"
38 #include "write.h"
39 #include "write_common.h"
40
41 /** define the array of error lists needed by para_audiod */
42 INIT_AUDIOD_ERRLISTS;
43 /** define the array containing all supported audio formats */
44 DEFINE_AUDIO_FORMAT_ARRAY;
45
46 /** defines how to handle one supported audio format */
47 struct audio_format_info {
48 /** pointer to the receiver for this audio format */
49 struct receiver *receiver;
50 /** the receiver configuration */
51 void *receiver_conf;
52 /** the number of filters that should be activated for this audio format */
53 unsigned int num_filters;
54 /** pointer to the array of filters to be activated */
55 struct filter **filters;
56 /** pointer to the array of filter configurations */
57 void **filter_conf;
58 /** the number of filters that should be activated for this audio format */
59 unsigned int num_writers;
60 /** pointer to the array of writers to be activated */
61 struct writer **writers;
62 /** pointer to the array of writer configurations */
63 void **writer_conf;
64 /** do not start receiver/filters/writer before this time */
65 struct timeval restart_barrier;
66 };
67
68 struct slot_info slot[MAX_STREAM_SLOTS];
69
70
71 int audiod_status = AUDIOD_ON;
72
73 struct gengetopt_args_info conf;
74 static char *socket_name;
75 static FILE *logfile;
76 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
77
78 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
79
80 static struct status_task status_task_struct;
81 struct status_task *stat_task = &status_task_struct;
82
83 /**
84 * the task for handling audiod commands
85 *
86 * \sa struct task, struct sched
87 */
88 struct command_task {
89 /** the local listening socket */
90 int fd;
91 /** the associated task structure */
92 struct task task;
93 };
94
95 struct signal_task {
96 int fd;
97 int signum;
98 struct task task;
99 };
100
101 /** iterate over all supported audio formats */
102 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
103
104 /**
105 * get the audio format number
106 * \param name the name of the audio format
107 *
108 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
109 * \a name is not a supported audio format.
110 */
111 int get_audio_format_num(char *name)
112 {
113 int i;
114 FOR_EACH_AUDIO_FORMAT(i)
115 if (!strcmp(name, audio_formats[i]))
116 return i;
117 return -E_UNSUPPORTED_AUDIO_FORMAT;
118 }
119
120 /*
121 * log function. first argument is loglevel.
122 */
123 void para_log(int ll, const char* fmt,...)
124 {
125 va_list argp;
126 FILE *outfd;
127 struct tm *tm;
128 time_t t1;
129 char str[MAXLINE] = "";
130 static char *hostname;
131
132 if (ll < conf.loglevel_arg)
133 return;
134 if (!hostname)
135 hostname = para_hostname();
136 outfd = logfile? logfile : stderr;
137 time(&t1);
138 tm = localtime(&t1);
139 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
140 fprintf(outfd, "%s %s ", str, hostname);
141 if (conf.loglevel_arg <= INFO)
142 fprintf(outfd, "%i ", ll);
143 va_start(argp, fmt);
144 vfprintf(outfd, fmt, argp);
145 va_end(argp);
146 }
147
148 static char *configfile_exists(void)
149 {
150 static char *config_file;
151
152 if (!config_file) {
153 char *home = para_homedir();
154 config_file = make_message("%s/.paraslash/audiod.conf", home);
155 free(home);
156 }
157 return file_exists(config_file)? config_file : NULL;
158 }
159
160 static void setup_signal_handling(void)
161 {
162 sig_task->fd = para_signal_init();
163 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
164 para_install_sighandler(SIGINT);
165 para_install_sighandler(SIGTERM);
166 para_install_sighandler(SIGCHLD);
167 para_install_sighandler(SIGHUP);
168 para_install_sighandler(SIGPIPE);
169 // signal(SIGPIPE, SIG_IGN);
170 }
171
172 static void clear_slot(int slot_num)
173 {
174 struct slot_info *s = &slot[slot_num];
175
176 PARA_INFO_LOG("clearing slot %d\n", slot_num);
177 memset(s, 0, sizeof(struct slot_info));
178 s->format = -1;
179 }
180
181 static void close_receiver(int slot_num)
182 {
183 struct slot_info *s = &slot[slot_num];
184 struct audio_format_info *a;
185 const struct timeval restart_delay = {0, 200 * 1000};
186
187 if (s->format < 0 || !s->receiver_node)
188 return;
189 a = &afi[s->format];
190 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
191 audio_formats[s->format] , slot_num, s->receiver_node->eof);
192 // if (!s->receiver_node->eof)
193 // unregister_task(&s->receiver_node->task);
194 a->receiver->close(s->receiver_node);
195 free(s->receiver_node);
196 s->receiver_node = NULL;
197 /* set restart barrier */
198 tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
199 }
200
201 static void kill_all_decoders(void)
202 {
203 int i;
204
205 FOR_EACH_SLOT(i) {
206 struct slot_info *s = &slot[i];
207 if (s->wng && !s->wng->eof) {
208 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
209 i);
210 wng_unregister(s->wng);
211 s->wng->eof = 1;
212 }
213 if (s->fc && !s->fc->eof) {
214 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
215 unregister_task(&s->fc->task);
216 s->fc->eof = 1;
217 }
218 if (s->receiver_node && !s->receiver_node->eof) {
219 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
220 unregister_task(&s->receiver_node->task);
221 s->receiver_node->eof = 1;
222 }
223 }
224 }
225
226 static int get_empty_slot(void)
227 {
228 int i;
229 struct slot_info *s;
230
231 FOR_EACH_SLOT(i) {
232 s = &slot[i];
233 if (s->format < 0) {
234 clear_slot(i);
235 return i;
236 }
237 if (s->wng || s->receiver_node || s->fc)
238 continue;
239 clear_slot(i);
240 return i;
241 }
242 return -E_NO_MORE_SLOTS;
243 }
244
245 static int decoder_running(int format)
246 {
247 int i, ret = 0;
248 struct slot_info *s;
249
250 FOR_EACH_SLOT(i) {
251 s = &slot[i];
252 if (s->format == format && s->receiver_node)
253 ret |= 1;
254 if (s->format == format && s->wng)
255 ret |= 2;
256 }
257 return ret;
258 }
259
260 static void close_stat_pipe(void)
261 {
262 int i;
263
264 if (stat_task->fd < 0)
265 return;
266 PARA_NOTICE_LOG("%s", "closing status pipe\n");
267 close(stat_task->fd);
268 del_close_on_fork_list(stat_task->fd);
269 stat_task->fd = -1;
270 // kill_all_decoders();
271 for (i = 0; i < NUM_STAT_ITEMS; i++) {
272 free(stat_task->stat_item_values[i]);
273 stat_task->stat_item_values[i] = NULL;
274 }
275 dump_empty_status();
276 stat_task->length_seconds = 0;
277 stat_task->offset_seconds = 0;
278 audiod_status_dump();
279 stat_task->playing = 0;
280 stat_task->stat_item_values[SI_STATUS_BAR] = make_message(
281 "%s:no connection to para_server\n",
282 status_item_list[SI_STATUS_BAR]);
283 stat_client_write(stat_task->stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
284 }
285
286 void __noreturn clean_exit(int status, const char *msg)
287 {
288 PARA_EMERG_LOG("%s\n", msg);
289 if (socket_name)
290 unlink(socket_name);
291 close_stat_pipe();
292 exit(status);
293 }
294
295 /**
296 * get the number of filters
297 *
298 * \param audio_format_num the number identifying the audio format
299 *
300 * \return the number of filters for the given audio format
301 *
302 * \sa struct filter;
303 */
304 int num_filters(int audio_format_num)
305 {
306 return afi[audio_format_num].num_filters;
307 }
308
309 static void filter_event_handler(struct task *t)
310 {
311 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
312 struct filter_chain *fc = t->private_data;
313 fc->eof = 1;
314 unregister_task(t);
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 int nf = a->num_filters;
322 int i;
323
324 s->fc = NULL;
325 if (!nf)
326 return;
327 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
328 s->fc = para_calloc(sizeof(struct filter_chain));
329 INIT_LIST_HEAD(&s->fc->filters);
330 s->fc->inbuf = s->receiver_node->buf;
331 s->fc->in_loaded = &s->receiver_node->loaded;
332 s->fc->input_eof = &s->receiver_node->eof;
333 s->fc->task.pre_select = filter_pre_select;
334 s->fc->task.event_handler = filter_event_handler;
335 s->fc->task.private_data = s->fc;
336 s->fc->eof = 0;
337
338 s->receiver_node->output_eof = &s->fc->eof;
339 sprintf(s->fc->task.status, "filter chain");
340 for (i = 0; i < nf; i++) {
341 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
342 fn->conf = a->filter_conf[i];
343 fn->fc = s->fc;
344 fn->filter = a->filters[i];
345 INIT_LIST_HEAD(&fn->callbacks);
346 list_add_tail(&fn->node, &s->fc->filters);
347 fn->filter->open(fn);
348 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
349 audio_formats[s->format], i + 1, nf,
350 fn->filter->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 wng_event_handler(struct task *t)
358 {
359 struct writer_node_group *wng = t->private_data;
360
361 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
362 wng->eof = 1;
363 wng_unregister(wng);
364 }
365
366 static void open_writers(int slot_num)
367 {
368 int ret, i;
369 struct slot_info *s = &slot[slot_num];
370 struct audio_format_info *a = &afi[s->format];
371
372 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
373 if (!a->num_writers)
374 s->wng = setup_default_wng();
375 else
376 s->wng = wng_new(a->num_writers);
377 if (s->fc) {
378 s->wng->buf = s->fc->outbuf;
379 s->wng->loaded = s->fc->out_loaded;
380 s->wng->input_eof = &s->fc->eof;
381 s->wng->channels = &s->fc->channels;
382 s->wng->samplerate = &s->fc->samplerate;
383 s->fc->output_eof = &s->wng->eof;
384 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
385 } else {
386 s->wng->buf = s->receiver_node->buf;
387 s->wng->loaded = &s->receiver_node->loaded;
388 s->wng->input_eof = &s->receiver_node->eof;
389 }
390 s->wng->task.event_handler = wng_event_handler;
391 for (i = 0; i < a->num_writers; i++) {
392 s->wng->writer_nodes[i].conf = a->writer_conf[i];
393 s->wng->writer_nodes[i].writer = a->writers[i];
394 }
395 ret = wng_open(s->wng);
396 if (ret < 0) {
397 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
398 return;
399 }
400 s->wstime = *now;
401 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
402 }
403
404 static void rn_event_handler(struct task *t)
405 {
406 struct receiver_node *rn = t->private_data;
407
408 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
409 unregister_task(t);
410 rn->eof = 1;
411 }
412
413 static void open_receiver(int format)
414 {
415 struct audio_format_info *a = &afi[format];
416 struct slot_info *s;
417 int ret, slot_num;
418 struct receiver_node *rn;
419
420 slot_num = get_empty_slot();
421 if (slot_num < 0)
422 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
423 s = &slot[slot_num];
424 s->format = format;
425 s->receiver_node = para_calloc(sizeof(struct receiver_node));
426 rn = s->receiver_node;
427 rn->receiver = a->receiver;
428 rn->conf = a->receiver_conf;
429 ret = a->receiver->open(s->receiver_node);
430 if (ret < 0) {
431 PARA_ERROR_LOG("failed to open receiver (%s)\n",
432 PARA_STRERROR(-ret));
433 free(s->receiver_node);
434 s->receiver_node = NULL;
435 return;
436 }
437 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
438 audio_formats[s->format], a->receiver->name, slot_num);
439 rn->task.private_data = s->receiver_node;
440 rn->task.pre_select = a->receiver->pre_select;
441 rn->task.post_select = a->receiver->post_select;
442 rn->task.event_handler = rn_event_handler;
443 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
444 register_task(&rn->task);
445 }
446
447 static int open_current_receiver(struct sched *s)
448 {
449 int i;
450 struct timeval diff;
451
452 if (!stat_task->af_status)
453 return 0;
454 i = get_audio_format_num(stat_task->af_status);
455 if (i < 0)
456 return 0;
457 if (decoder_running(i))
458 return 0;
459 if (tv_diff(now, &afi[i].restart_barrier, &diff) < 0) {
460 s->timeout = diff;
461 return 0;
462 }
463 open_receiver(i);
464 return 1;
465 }
466
467 static void compute_time_diff(const struct timeval *status_time)
468 {
469 struct timeval tmp, diff;
470 static int count;
471 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
472 const struct timeval max_deviation = {0, 500 * 1000};
473 const int time_smooth = 5;
474
475 sign = tv_diff(status_time, now, &diff);
476 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
477 // sign, sa_time_diff_sign);
478 if (!count) {
479 sa_time_diff_sign = sign;
480 stat_task->sa_time_diff = diff;
481 count++;
482 return;
483 }
484 if (count > 5) {
485 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
486 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
487 PARA_WARNING_LOG("time diff jump: %lims\n",
488 s * tv2ms(&tmp));
489 }
490 count++;
491 sa_time_diff_sign = tv_convex_combination(
492 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
493 count > 10? sign : sign * time_smooth, &diff,
494 &tmp);
495 stat_task->sa_time_diff = tmp;
496 PARA_DEBUG_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
497 sign > 0? "+" : "-",
498 tv2ms(&diff),
499 sa_time_diff_sign ? "+" : "-",
500 tv2ms(&stat_task->sa_time_diff)
501 );
502 }
503
504 static void check_stat_line(char *line)
505 {
506 int itemnum;
507 size_t ilen = 0;
508 long unsigned sec, usec;
509 char *tmp;
510
511 // PARA_INFO_LOG("line: %s\n", line);
512 if (!line)
513 return;
514 itemnum = stat_line_valid(line);
515 if (itemnum < 0) {
516 PARA_WARNING_LOG("invalid status line: %s\n", line);
517 return;
518 }
519 tmp = make_message("%s\n", line);
520 stat_client_write(tmp, itemnum);
521 free(tmp);
522 free(stat_task->stat_item_values[itemnum]);
523 stat_task->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 break;
529 case SI_FORMAT:
530 free(stat_task->af_status);
531 stat_task->af_status = para_strdup(line + ilen + 1);
532 break;
533 case SI_OFFSET:
534 stat_task->offset_seconds = atoi(line + ilen + 1);
535 break;
536 case SI_LENGTH:
537 stat_task->length_seconds = atoi(line + ilen + 1);
538 break;
539 case SI_STREAM_START:
540 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
541 stat_task->server_stream_start.tv_sec = sec;
542 stat_task->server_stream_start.tv_usec = usec;
543 }
544 break;
545 case SI_CURRENT_TIME:
546 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
547 struct timeval tv = {sec, usec};
548 compute_time_diff(&tv);
549 }
550 break;
551 }
552 }
553
554 static void handle_signal(int sig)
555 {
556 switch (sig) {
557 case SIGCHLD:
558 for (;;) {
559 pid_t pid = para_reap_child();
560 if (pid <= 0)
561 return;
562 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
563 }
564 case SIGINT:
565 case SIGTERM:
566 case SIGHUP:
567 PARA_EMERG_LOG("terminating on signal %d\n", sig);
568 clean_exit(EXIT_FAILURE, "caught deadly signal");
569 return;
570 }
571 }
572
573 static void try_to_close_slot(int slot_num)
574 {
575 struct slot_info *s = &slot[slot_num];
576
577 if (s->format < 0)
578 return;
579 if (s->receiver_node && !s->receiver_node->eof)
580 return;
581 if (s->fc && !s->fc->eof)
582 return;
583 if (s->wng && !s->wng->eof)
584 return;
585 PARA_INFO_LOG("closing slot %d \n", slot_num);
586 wng_close(s->wng);
587 close_filters(s->fc);
588 free(s->fc);
589 close_receiver(slot_num);
590 clear_slot(slot_num);
591 }
592
593 /*
594 * Check if any receivers/filters/writers need to be started and do so if
595 * neccessary. Since the pre_select function didn't have a chance yet to put
596 * file descriptors into the fd sets given by s, make the upcoming select()
597 * return immediately to avoid a long timeout in case we started something.
598 */
599 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
600 {
601 int i;
602 struct timeval min_delay = {0, 1};
603
604 t->ret = 1;
605 if (audiod_status != AUDIOD_ON || !stat_task->playing)
606 return kill_all_decoders();
607 if (open_current_receiver(s))
608 s->timeout = min_delay;
609 FOR_EACH_SLOT(i) {
610 struct slot_info *sl = &slot[i];
611 struct audio_format_info *a;
612
613 if (sl->format < 0)
614 continue;
615 a = &afi[sl->format];
616 if (!sl->receiver_node)
617 continue;
618 if (!a->num_filters) {
619 if (sl->receiver_node->loaded && !sl->wng) {
620 open_writers(i);
621 s->timeout = min_delay;
622 }
623 continue;
624 }
625 if (sl->receiver_node->loaded && !sl->fc) {
626 open_filters(i);
627 s->timeout = min_delay;
628 continue;
629 }
630 if (sl->fc && *sl->fc->out_loaded && !sl->wng) {
631 open_writers(i);
632 s->timeout = min_delay;
633 }
634 }
635 }
636
637 static void audiod_post_select(__a_unused struct sched *s,
638 __a_unused struct task *t)
639 {
640 int i;
641
642 /* save away the current time for other users */
643 t->ret = 1;
644 FOR_EACH_SLOT(i)
645 try_to_close_slot(i);
646 }
647
648 static void init_audiod_task(struct task *t)
649 {
650 t->pre_select = audiod_pre_select;
651 t->post_select = audiod_post_select;
652 t->event_handler = NULL;
653 t->private_data = t;
654 sprintf(t->status, "audiod task");
655 }
656
657 static int parse_stream_command(const char *txt, char **cmd)
658 {
659 char *p = strchr(txt, ':');
660 int i;
661
662 if (!p)
663 return -E_MISSING_COLON;
664 p++;
665 FOR_EACH_AUDIO_FORMAT(i) {
666 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
667 continue;
668 *cmd = p;
669 return i;
670 }
671 return -E_UNSUPPORTED_AUDIO_FORMAT;
672 }
673
674 static int add_filter(int format, char *cmdline)
675 {
676 struct audio_format_info *a = &afi[format];
677 int filter_num, nf = a->num_filters;
678
679 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
680 if (filter_num < 0)
681 return filter_num;
682 a->filters[nf] = &filters[filter_num];
683 a->num_filters++;
684 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
685 a->filters[nf]->name);
686 return filter_num;
687 }
688
689 static int init_writers(void)
690 {
691 int i, ret, nw;
692 char *cmd;
693 struct audio_format_info *a;
694
695 init_supported_writers();
696 nw = PARA_MAX(1, conf.writer_given);
697 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
698 FOR_EACH_AUDIO_FORMAT(i) {
699 a = &afi[i];
700 a->writer_conf = para_malloc(nw * sizeof(void *));
701 a->writers = para_malloc(nw * sizeof(struct writer *));
702 a->num_writers = 0;
703 }
704 for (i = 0; i < conf.writer_given; i++) {
705 void *wconf;
706 int writer_num;
707 ret = parse_stream_command(conf.writer_arg[i], &cmd);
708 if (ret < 0)
709 goto out;
710 a = &afi[ret];
711 nw = a->num_writers;
712 wconf = check_writer_arg(cmd, &writer_num);
713 if (!wconf) {
714 ret = writer_num;
715 goto out;
716 }
717 a->writers[nw] = &writers[writer_num];
718 a->writer_conf[nw] = wconf;
719 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
720 nw, writer_names[writer_num]);
721 a->num_writers++;
722 }
723 ret = 1;
724 out:
725 return ret;
726 }
727
728 static int init_receivers(void)
729 {
730 int i, ret, receiver_num;
731 char *cmd = NULL;
732 struct audio_format_info *a;
733
734 for (i = 0; receivers[i].name; i++) {
735 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
736 receivers[i].init(&receivers[i]);
737 }
738 for (i = 0; i < conf.receiver_given; i++) {
739 char *arg = conf.receiver_arg[i];
740 char *recv = strchr(arg, ':');
741 ret = -E_MISSING_COLON;
742 if (!recv)
743 goto out;
744 *recv = '\0';
745 recv++;
746 ret = get_audio_format_num(arg);
747 if (ret < 0)
748 goto out;
749 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
750 if (!afi[ret].receiver_conf) {
751 ret = -E_RECV_SYNTAX;
752 goto out;
753 }
754 afi[ret].receiver = &receivers[receiver_num];
755 }
756 /* use the first available receiver with no arguments
757 * for those audio formats for which no receiver
758 * was specified
759 */
760 cmd = para_strdup(receivers[0].name);
761 FOR_EACH_AUDIO_FORMAT(i) {
762 a = &afi[i];
763 if (a->receiver_conf)
764 continue;
765 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
766 if (!a->receiver_conf)
767 return -E_RECV_SYNTAX;
768 a->receiver = &receivers[receiver_num];
769 }
770 ret = 1;
771 out:
772 free(cmd);
773 return ret;
774 }
775
776 static int init_default_filters(void)
777 {
778 int i, ret = 1;
779
780 FOR_EACH_AUDIO_FORMAT(i) {
781 struct audio_format_info *a = &afi[i];
782 char *tmp;
783 int j;
784
785 if (a->num_filters)
786 continue; /* no default -- nothing to to */
787 /* add "dec" to audio format name */
788 tmp = make_message("%sdec", audio_formats[i]);
789 for (j = 0; filters[j].name; j++)
790 if (!strcmp(tmp, filters[j].name))
791 break;
792 free(tmp);
793 ret = -E_UNSUPPORTED_FILTER;
794 if (!filters[j].name)
795 goto out;
796 tmp = para_strdup(filters[j].name);
797 ret = add_filter(i, tmp);
798 free(tmp);
799 if (ret < 0)
800 goto out;
801 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
802 filters[j].name);
803 }
804 out:
805 return ret;
806 }
807
808 static int init_filters(void)
809 {
810 int i, ret, nf;
811
812 filter_init(filters);
813 nf = PARA_MAX(1, conf.filter_given);
814 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
815 FOR_EACH_AUDIO_FORMAT(i) {
816 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
817 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
818 }
819 if (!conf.no_default_filters_given)
820 return init_default_filters();
821 for (i = 0; i < conf.filter_given; i++) {
822 char *arg = conf.filter_arg[i];
823 char *filter_name = strchr(arg, ':');
824 ret = -E_MISSING_COLON;
825 if (!filter_name)
826 goto out;
827 *filter_name = '\0';
828 filter_name++;
829 ret = get_audio_format_num(arg);
830 if (ret < 0)
831 goto out;
832 ret = add_filter(ret, filter_name);
833 if (ret < 0)
834 goto out;
835 }
836 ret = init_default_filters(); /* use default values for the rest */
837 out:
838 return ret;
839 }
840
841 static int init_stream_io(void)
842 {
843 int ret;
844
845 ret = init_writers();
846 if (ret < 0)
847 return ret;
848 ret = init_receivers();
849 if (ret < 0)
850 return ret;
851 ret = init_filters();
852 if (ret < 0)
853 return ret;
854 return 1;
855 }
856
857 static int audiod_get_socket(void)
858 {
859 struct sockaddr_un unix_addr;
860 int fd;
861
862 if (conf.socket_given)
863 socket_name = para_strdup(conf.socket_arg);
864 else {
865 char *hn = para_hostname();
866 socket_name = make_message("/var/paraslash/audiod_socket.%s",
867 hn);
868 free(hn);
869 }
870 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
871 if (conf.force_given)
872 unlink(socket_name);
873 fd = create_pf_socket(socket_name, &unix_addr,
874 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
875 if (fd < 0) {
876 PARA_EMERG_LOG("%s", "can not connect to socket\n");
877 exit(EXIT_FAILURE); /* do not unlink socket */
878 }
879 if (listen(fd , 5) < 0) {
880 PARA_EMERG_LOG("%s", "can not listen on socket\n");
881 exit(EXIT_FAILURE); /* do not unlink socket */
882 }
883 add_close_on_fork_list(fd);
884 mark_fd_nonblock(fd);
885 return fd;
886 }
887
888 static int open_stat_pipe(void)
889 {
890 int ret, fd[3] = {-1, 1, 0};
891 pid_t pid;
892 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
893 if (ret >= 0) {
894 ret = fd[1];
895 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
896 add_close_on_fork_list(ret);
897 mark_fd_nonblock(ret);
898 } else
899 clean_exit(EXIT_FAILURE, "failed to open status pipe");
900 return ret;
901 }
902
903 void signal_event_handler(struct task *t)
904 {
905 struct signal_task *st = t->private_data;
906
907 if (t->ret != -E_SIGNAL_CAUGHT)
908 PARA_ERROR_LOG("%s (ignored)\n", PARA_STRERROR(-t->ret));
909 else
910 handle_signal(st->signum);
911 }
912
913 void signal_pre_select(struct sched *s, struct task *t)
914 {
915 struct signal_task *st = t->private_data;
916 t->ret = 1;
917 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
918 }
919
920 void signal_post_select(struct sched *s, struct task *t)
921 {
922 struct signal_task *st = t->private_data;
923 t->ret = 1;
924 if (!FD_ISSET(st->fd, &s->rfds))
925 return;
926 t->ret = -E_SIGNAL_CAUGHT;
927 st->signum = para_next_signal();
928 }
929
930 void signal_setup_default(struct signal_task *st)
931 {
932 st->task.pre_select = signal_pre_select;
933 st->task.post_select = signal_post_select;
934 st->task.private_data = st;
935 sprintf(st->task.status, "signal task");
936 }
937
938 static void command_pre_select(struct sched *s, struct task *t)
939 {
940 struct command_task *ct = t->private_data;
941 t->ret = 1;
942 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
943
944 }
945
946 static void command_post_select(struct sched *s, struct task *t)
947 {
948 int ret;
949 struct command_task *ct = t->private_data;
950
951 t->ret = 1; /* always successful */
952 if (audiod_status != AUDIOD_OFF)
953 audiod_status_dump();
954 if (!FD_ISSET(ct->fd, &s->rfds))
955 return;
956 ret = handle_connect(ct->fd);
957 if (ret < 0)
958 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
959 }
960
961 static void init_command_task(struct command_task *ct)
962 {
963 ct->task.pre_select = command_pre_select;
964 ct->task.post_select = command_post_select;
965 ct->task.event_handler = NULL;
966 ct->task.private_data = ct;
967 ct->fd = audiod_get_socket(); /* doesn't return on errors */
968 sprintf(ct->task.status, "command task");
969 }
970
971 static void status_event_handler(__a_unused struct task *t)
972 {
973 struct timeval delay = {1, 0};
974 int i;
975 struct status_task *st = t->private_data;
976
977 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-t->ret));
978 close_stat_pipe();
979 /* avoid busy loop if server is down */
980 tv_add(now, &delay, &st->restart_barrier);
981 FOR_EACH_AUDIO_FORMAT(i)
982 afi[i].restart_barrier = st->restart_barrier;
983 }
984
985 static void status_pre_select(struct sched *s, struct task *t)
986 {
987 struct status_task *st = t->private_data;
988 t->ret = 1;
989 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
990 close_stat_pipe();
991 if (st->fd < 0 && audiod_status != AUDIOD_OFF
992 && tv_diff(now, &st->restart_barrier, NULL) > 0) {
993 st->fd = open_stat_pipe();
994 st->loaded = 0;
995 st->buf[0] = '\0';
996 }
997 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
998 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
999 }
1000
1001 static void status_post_select(struct sched *s, struct task *t)
1002 {
1003 struct status_task *st = t->private_data;
1004
1005 t->ret = 1;
1006 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1007 return;
1008 t->ret = read(st->fd, st->buf + st->loaded, STRINGSIZE - 1 - st->loaded);
1009 if (t->ret <= 0) {
1010 if (!t->ret)
1011 t->ret = -E_STATUS_EOF;
1012 return;
1013 }
1014 st->buf[t->ret + st->loaded] = '\0';
1015 st->loaded = for_each_line(st->buf, t->ret + st->loaded,
1016 &check_stat_line);
1017 }
1018
1019 static void init_status_task(struct status_task *st)
1020 {
1021 memset(st, 0, sizeof(struct status_task));
1022 st->task.pre_select = status_pre_select;
1023 st->task.post_select = status_post_select;
1024 st->task.event_handler = status_event_handler;
1025 st->task.private_data = st;
1026 st->fd = -1;
1027 st->sa_time_diff_sign = 1;
1028 sprintf(st->task.status, "status task");
1029 }
1030
1031 static void set_initial_status(void)
1032 {
1033 audiod_status = AUDIOD_ON;
1034 if (!conf.mode_given)
1035 return;
1036 if (!strcmp(conf.mode_arg, "sb")) {
1037 audiod_status = AUDIOD_STANDBY;
1038 return;
1039 }
1040 if (!strcmp(conf.mode_arg, "off")) {
1041 audiod_status = AUDIOD_OFF;
1042 return;
1043 }
1044 if (strcmp(conf.mode_arg, "on"))
1045 PARA_WARNING_LOG("%s", "invalid mode\n");
1046 }
1047
1048 int main(int argc, char *argv[])
1049 {
1050 char *cf;
1051 int ret, i;
1052 struct sched s;
1053 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1054 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1055
1056 valid_fd_012();
1057 cmdline_parser(argc, argv, &conf);
1058 para_drop_privileges(conf.user_arg, conf.group_arg);
1059 cf = configfile_exists();
1060 if (cf) {
1061 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1062 PARA_EMERG_LOG("%s", "parse error in config file\n");
1063 exit(EXIT_FAILURE);
1064 }
1065 }
1066 if (conf.logfile_given)
1067 logfile = open_log(conf.logfile_arg);
1068 log_welcome("para_audiod", conf.loglevel_arg);
1069 i = init_stream_io();
1070 if (i < 0) {
1071 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1072 exit(EXIT_FAILURE);
1073 }
1074 server_uptime(UPTIME_SET);
1075 set_initial_status();
1076 FOR_EACH_SLOT(i)
1077 clear_slot(i);
1078 init_grabbing();
1079 setup_signal_handling();
1080 signal_setup_default(sig_task);
1081 sig_task->task.event_handler = signal_event_handler;
1082
1083 init_status_task(stat_task);
1084 init_command_task(cmd_task);
1085 init_audiod_task(audiod_task);
1086
1087 if (conf.daemon_given)
1088 daemon_init();
1089
1090 register_task(&sig_task->task);
1091 register_task(&cmd_task->task);
1092 register_task(&stat_task->task);
1093 register_task(audiod_task);
1094 s.default_timeout.tv_sec = 3;
1095 s.default_timeout.tv_usec = 99 * 1000;
1096 ret = sched(&s);
1097
1098 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1099 return EXIT_FAILURE;
1100 }