Don't exit if there are no more empty slots
[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 "sched.h"
26 #include "recv.h"
27 #include "filter.h"
28 #include "grab_client.cmdline.h"
29 #include "grab_client.h"
30 #include "client.cmdline.h"
31 #include "client.h"
32 #include "audiod.h"
33 #include "net.h"
34 #include "daemon.h"
35 #include "string.h"
36 #include "fd.h"
37 #include "write.h"
38 #include "write_common.h"
39 #include "error.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 audiod_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 static struct timeval initial_delay_barrier;
83
84 /**
85 * the task for handling audiod commands
86 *
87 * \sa struct task, struct sched
88 */
89 struct command_task {
90 /** the local listening socket */
91 int fd;
92 /** the associated task structure */
93 struct task task;
94 };
95
96 /**
97 * task for signal handling
98 */
99 struct signal_task {
100 /** the signal pipe */
101 int fd;
102 /** the number of the most recent signal */
103 int signum;
104 /** the associated task structure */
105 struct task task;
106 };
107
108 /** iterate over all supported audio formats */
109 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
110
111 /**
112 * get the audio format number
113 * \param name the name of the audio format
114 *
115 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
116 * \a name is not a supported audio format.
117 */
118 int get_audio_format_num(char *name)
119 {
120 int i;
121 FOR_EACH_AUDIO_FORMAT(i)
122 if (!strcmp(name, audio_formats[i]))
123 return i;
124 return -E_UNSUPPORTED_AUDIO_FORMAT;
125 }
126
127 /*
128 * log function. first argument is loglevel.
129 */
130 void para_log(int ll, const char* fmt,...)
131 {
132 va_list argp;
133 FILE *outfd;
134 struct tm *tm;
135 time_t t1;
136 char str[MAXLINE] = "";
137 static char *hostname;
138
139 if (ll < conf.loglevel_arg)
140 return;
141 if (!hostname)
142 hostname = para_hostname();
143 outfd = logfile? logfile : stderr;
144 time(&t1);
145 tm = localtime(&t1);
146 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
147 fprintf(outfd, "%s %s ", str, hostname);
148 if (conf.loglevel_arg <= INFO)
149 fprintf(outfd, "%i ", ll);
150 va_start(argp, fmt);
151 vfprintf(outfd, fmt, argp);
152 va_end(argp);
153 }
154
155 static char *configfile_exists(void)
156 {
157 static char *config_file;
158
159 if (!config_file) {
160 char *home = para_homedir();
161 config_file = make_message("%s/.paraslash/audiod.conf", home);
162 free(home);
163 }
164 return file_exists(config_file)? config_file : NULL;
165 }
166
167 static void setup_signal_handling(void)
168 {
169 sig_task->fd = para_signal_init();
170 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
171 para_install_sighandler(SIGINT);
172 para_install_sighandler(SIGTERM);
173 para_install_sighandler(SIGHUP);
174 signal(SIGPIPE, SIG_IGN);
175 }
176
177 static void clear_slot(int slot_num)
178 {
179 struct slot_info *s = &slot[slot_num];
180
181 PARA_INFO_LOG("clearing slot %d\n", slot_num);
182 memset(s, 0, sizeof(struct slot_info));
183 s->format = -1;
184 }
185
186 static void close_receiver(int slot_num)
187 {
188 struct slot_info *s = &slot[slot_num];
189 struct audio_format_info *a;
190
191 if (s->format < 0 || !s->receiver_node)
192 return;
193 a = &afi[s->format];
194 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
195 audio_formats[s->format] , slot_num, s->receiver_node->eof);
196 a->receiver->close(s->receiver_node);
197 free(s->receiver_node);
198 s->receiver_node = NULL;
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 void close_stat_pipe(void)
246 {
247 int i;
248
249 if (!stat_task->pcd)
250 return;
251 client_close(stat_task->pcd);
252 stat_task->pcd = NULL;
253 for (i = 0; i < NUM_STAT_ITEMS; i++) {
254 free(stat_task->stat_item_values[i]);
255 stat_task->stat_item_values[i] = NULL;
256 }
257 dump_empty_status();
258 stat_task->length_seconds = 0;
259 stat_task->offset_seconds = 0;
260 audiod_status_dump();
261 stat_task->playing = 0;
262 stat_task->stat_item_values[SI_STATUS_BAR] = make_message(
263 "%s:no connection to para_server\n",
264 status_item_list[SI_STATUS_BAR]);
265 stat_client_write(stat_task->stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
266 }
267
268 void __noreturn clean_exit(int status, const char *msg)
269 {
270 PARA_EMERG_LOG("%s\n", msg);
271 if (socket_name)
272 unlink(socket_name);
273 close_stat_pipe();
274 exit(status);
275 }
276
277 /**
278 * get the number of filters
279 *
280 * \param audio_format_num the number identifying the audio format
281 *
282 * \return the number of filters for the given audio format
283 *
284 * \sa struct filter;
285 */
286 int num_filters(int audio_format_num)
287 {
288 return afi[audio_format_num].num_filters;
289 }
290
291 static void filter_event_handler(struct task *t)
292 {
293 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
294 struct filter_chain *fc = t->private_data;
295 fc->eof = 1;
296 unregister_task(t);
297 }
298
299 static void open_filters(int slot_num)
300 {
301 struct slot_info *s = &slot[slot_num];
302 struct audio_format_info *a = &afi[s->format];
303 int nf = a->num_filters;
304 int i;
305
306 s->fc = NULL;
307 if (!nf)
308 return;
309 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
310 s->fc = para_calloc(sizeof(struct filter_chain));
311 INIT_LIST_HEAD(&s->fc->filters);
312 s->fc->inbuf = s->receiver_node->buf;
313 s->fc->in_loaded = &s->receiver_node->loaded;
314 s->fc->input_eof = &s->receiver_node->eof;
315 s->fc->task.pre_select = filter_pre_select;
316 s->fc->task.event_handler = filter_event_handler;
317 s->fc->task.private_data = s->fc;
318 s->fc->eof = 0;
319
320 s->receiver_node->output_eof = &s->fc->eof;
321 sprintf(s->fc->task.status, "filter chain");
322 for (i = 0; i < nf; i++) {
323 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
324 fn->conf = a->filter_conf[i];
325 fn->fc = s->fc;
326 fn->filter = a->filters[i];
327 INIT_LIST_HEAD(&fn->callbacks);
328 list_add_tail(&fn->node, &s->fc->filters);
329 fn->filter->open(fn);
330 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
331 audio_formats[s->format], i + 1, nf,
332 fn->filter->name, slot_num);
333 s->fc->outbuf = fn->buf;
334 s->fc->out_loaded = &fn->loaded;
335 }
336 register_task(&s->fc->task);
337 }
338
339 static void wng_event_handler(struct task *t)
340 {
341 struct writer_node_group *wng = t->private_data;
342
343 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
344 wng->eof = 1;
345 wng_unregister(wng);
346 }
347
348 static void open_writers(int slot_num)
349 {
350 int ret, i;
351 struct slot_info *s = &slot[slot_num];
352 struct audio_format_info *a = &afi[s->format];
353
354 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
355 if (!a->num_writers)
356 s->wng = setup_default_wng();
357 else
358 s->wng = wng_new(a->num_writers);
359 if (s->fc) {
360 s->wng->buf = s->fc->outbuf;
361 s->wng->loaded = s->fc->out_loaded;
362 s->wng->input_eof = &s->fc->eof;
363 s->wng->channels = &s->fc->channels;
364 s->wng->samplerate = &s->fc->samplerate;
365 s->fc->output_eof = &s->wng->eof;
366 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
367 } else {
368 s->wng->buf = s->receiver_node->buf;
369 s->wng->loaded = &s->receiver_node->loaded;
370 s->wng->input_eof = &s->receiver_node->eof;
371 }
372 s->wng->task.event_handler = wng_event_handler;
373 for (i = 0; i < a->num_writers; i++) {
374 s->wng->writer_nodes[i].conf = a->writer_conf[i];
375 s->wng->writer_nodes[i].writer = a->writers[i];
376 }
377 ret = wng_open(s->wng);
378 if (ret < 0) {
379 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
380 return;
381 }
382 s->wstime = *now;
383 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
384 }
385
386 static void rn_event_handler(struct task *t)
387 {
388 struct receiver_node *rn = t->private_data;
389 const struct timeval restart_delay = {0, 10 * 1000};
390 int i;
391
392 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
393 unregister_task(t);
394 rn->eof = 1;
395 /* set restart barrier */
396 FOR_EACH_SLOT(i) {
397 if (slot[i].receiver_node != rn)
398 continue;
399 tv_add(now, &restart_delay, &afi[slot[i].format].restart_barrier);
400 }
401 }
402
403 static int open_receiver(int format)
404 {
405 struct audio_format_info *a = &afi[format];
406 struct slot_info *s;
407 int ret, slot_num;
408 struct receiver_node *rn;
409 const struct timeval restart_delay = {1, 0};
410
411 ret = get_empty_slot();
412 if (ret < 0)
413 goto err;
414 slot_num = ret;
415 s = &slot[slot_num];
416 s->format = format;
417 s->receiver_node = para_calloc(sizeof(struct receiver_node));
418 rn = s->receiver_node;
419 rn->receiver = a->receiver;
420 rn->conf = a->receiver_conf;
421 ret = a->receiver->open(s->receiver_node);
422 if (ret < 0) {
423 free(s->receiver_node);
424 s->receiver_node = NULL;
425 goto err;
426 }
427 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
428 audio_formats[s->format], a->receiver->name, slot_num);
429 rn->task.private_data = s->receiver_node;
430 rn->task.pre_select = a->receiver->pre_select;
431 rn->task.post_select = a->receiver->post_select;
432 rn->task.event_handler = rn_event_handler;
433 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
434 register_task(&rn->task);
435 return 1;
436 err:
437 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
438 tv_add(now, &restart_delay, &afi[format].restart_barrier);
439 return ret;
440 }
441
442 static int receiver_running(int format)
443 {
444 int i;
445
446 FOR_EACH_SLOT(i) {
447 struct slot_info *s = &slot[i];
448 if (s->format == format && s->receiver_node
449 && !s->receiver_node->eof)
450 return 1;
451 }
452 return 0;
453 }
454
455 static int open_current_receiver(struct sched *s)
456 {
457 int i;
458 struct timeval diff;
459
460 if (!stat_task->af_status || !stat_task->pcd)
461 return 0;
462 i = get_audio_format_num(stat_task->af_status);
463 if (i < 0)
464 return 0;
465 if (receiver_running(i))
466 return 0;
467 if (tv_diff(now, &afi[i].restart_barrier, &diff) < 0) {
468 s->timeout = diff;
469 return 0;
470 }
471 return open_receiver(i) < 0? 0 : 1;
472 }
473
474 static void compute_time_diff(const struct timeval *status_time)
475 {
476 struct timeval tmp, diff;
477 static int count;
478 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
479 const struct timeval max_deviation = {0, 500 * 1000};
480 const int time_smooth = 5;
481
482 sign = tv_diff(status_time, now, &diff);
483 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
484 // sign, sa_time_diff_sign);
485 if (!count) {
486 sa_time_diff_sign = sign;
487 stat_task->sa_time_diff = diff;
488 count++;
489 return;
490 }
491 if (count > 5) {
492 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
493 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
494 PARA_WARNING_LOG("time diff jump: %lims\n",
495 s * tv2ms(&tmp));
496 }
497 count++;
498 sa_time_diff_sign = tv_convex_combination(
499 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
500 count > 10? sign : sign * time_smooth, &diff,
501 &tmp);
502 stat_task->sa_time_diff = tmp;
503 PARA_DEBUG_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
504 sign > 0? "+" : "-",
505 tv2ms(&diff),
506 sa_time_diff_sign ? "+" : "-",
507 tv2ms(&stat_task->sa_time_diff)
508 );
509 }
510
511 static void check_stat_line(char *line)
512 {
513 int itemnum;
514 size_t ilen = 0;
515 long unsigned sec, usec;
516 char *tmp;
517
518 // PARA_INFO_LOG("line: %s\n", line);
519 if (!line)
520 return;
521 itemnum = stat_line_valid(line);
522 if (itemnum < 0) {
523 PARA_WARNING_LOG("invalid status line: %s\n", line);
524 return;
525 }
526 tmp = make_message("%s\n", line);
527 stat_client_write(tmp, itemnum);
528 free(tmp);
529 free(stat_task->stat_item_values[itemnum]);
530 stat_task->stat_item_values[itemnum] = para_strdup(line);
531 ilen = strlen(status_item_list[itemnum]);
532 switch (itemnum) {
533 case SI_STATUS:
534 stat_task->playing = strstr(line, "playing")? 1 : 0;
535 break;
536 case SI_FORMAT:
537 free(stat_task->af_status);
538 stat_task->af_status = para_strdup(line + ilen + 1);
539 break;
540 case SI_OFFSET:
541 stat_task->offset_seconds = atoi(line + ilen + 1);
542 break;
543 case SI_LENGTH:
544 stat_task->length_seconds = atoi(line + ilen + 1);
545 break;
546 case SI_STREAM_START:
547 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
548 struct timeval a_start, delay;
549 delay.tv_sec = conf.stream_delay_arg / 1000;
550 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
551 stat_task->server_stream_start.tv_sec = sec;
552 stat_task->server_stream_start.tv_usec = usec;
553 if (stat_task->sa_time_diff_sign < 0)
554 tv_add(&stat_task->server_stream_start,
555 &stat_task->sa_time_diff, &a_start);
556 else
557 tv_diff(&stat_task->server_stream_start,
558 &stat_task->sa_time_diff, &a_start);
559 tv_add(&a_start, &delay, &initial_delay_barrier);
560 }
561 break;
562 case SI_CURRENT_TIME:
563 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
564 struct timeval tv = {sec, usec};
565 compute_time_diff(&tv);
566 }
567 break;
568 }
569 }
570
571 static void handle_signal(int sig)
572 {
573 switch (sig) {
574 case SIGINT:
575 case SIGTERM:
576 case SIGHUP:
577 PARA_EMERG_LOG("terminating on signal %d\n", sig);
578 clean_exit(EXIT_FAILURE, "caught deadly signal");
579 return;
580 }
581 }
582
583 static void try_to_close_slot(int slot_num)
584 {
585 struct slot_info *s = &slot[slot_num];
586
587 if (s->format < 0)
588 return;
589 if (s->receiver_node && !s->receiver_node->eof)
590 return;
591 if (s->fc && !s->fc->eof)
592 return;
593 if (s->wng && !s->wng->eof)
594 return;
595 PARA_INFO_LOG("closing slot %d \n", slot_num);
596 wng_close(s->wng);
597 close_filters(s->fc);
598 free(s->fc);
599 close_receiver(slot_num);
600 clear_slot(slot_num);
601 }
602
603 /*
604 * Check if any receivers/filters/writers need to be started and do so if
605 * neccessary. Since the pre_select function didn't have a chance yet to put
606 * file descriptors into the fd sets given by s, make the upcoming select()
607 * return immediately to avoid a long timeout in case we started something.
608 */
609 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
610 {
611 int i;
612 struct timeval min_delay = {0, 1};
613
614 t->ret = 1;
615 if (audiod_status != AUDIOD_ON || !stat_task->playing)
616 return kill_all_decoders();
617 if (open_current_receiver(s))
618 s->timeout = min_delay;
619 FOR_EACH_SLOT(i) {
620 struct slot_info *sl = &slot[i];
621 struct audio_format_info *a;
622 struct timeval diff;
623
624 if (sl->format < 0)
625 continue;
626 a = &afi[sl->format];
627 if (!sl->receiver_node)
628 continue;
629 if (!a->num_filters) {
630 if (sl->receiver_node->loaded && !sl->wng) {
631 open_writers(i);
632 s->timeout = min_delay;
633 }
634 continue;
635 }
636 if (sl->receiver_node->loaded && !sl->fc) {
637 open_filters(i);
638 s->timeout = min_delay;
639 continue;
640 }
641 if (!sl->fc || !*sl->fc->out_loaded || sl->wng)
642 continue;
643 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
644 PARA_INFO_LOG("barrier: %lu:%lu, now: %lu, %lu\n",
645 initial_delay_barrier.tv_sec,
646 initial_delay_barrier.tv_usec,
647 now->tv_sec, now->tv_usec);
648 open_writers(i);
649 s->timeout = min_delay;
650 continue;
651 }
652 PARA_INFO_LOG("inital delay: %lu ms left\n", tv2ms(&diff));
653 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
654 s->timeout = diff;
655 }
656 }
657 }
658
659 static void audiod_post_select(__a_unused struct sched *s,
660 __a_unused struct task *t)
661 {
662 int i;
663
664 /* save away the current time for other users */
665 t->ret = 1;
666 FOR_EACH_SLOT(i)
667 try_to_close_slot(i);
668 }
669
670 static void init_audiod_task(struct task *t)
671 {
672 t->pre_select = audiod_pre_select;
673 t->post_select = audiod_post_select;
674 t->event_handler = NULL;
675 t->private_data = t;
676 sprintf(t->status, "audiod task");
677 }
678
679 static int parse_stream_command(const char *txt, char **cmd)
680 {
681 char *p = strchr(txt, ':');
682 int i;
683
684 if (!p)
685 return -E_MISSING_COLON;
686 p++;
687 FOR_EACH_AUDIO_FORMAT(i) {
688 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
689 continue;
690 *cmd = p;
691 return i;
692 }
693 return -E_UNSUPPORTED_AUDIO_FORMAT;
694 }
695
696 static int add_filter(int format, char *cmdline)
697 {
698 struct audio_format_info *a = &afi[format];
699 int filter_num, nf = a->num_filters;
700
701 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
702 if (filter_num < 0)
703 return filter_num;
704 a->filters[nf] = &filters[filter_num];
705 a->num_filters++;
706 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
707 a->filters[nf]->name);
708 return filter_num;
709 }
710
711 static int init_writers(void)
712 {
713 int i, ret, nw;
714 char *cmd;
715 struct audio_format_info *a;
716
717 init_supported_writers();
718 nw = PARA_MAX(1, conf.writer_given);
719 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
720 FOR_EACH_AUDIO_FORMAT(i) {
721 a = &afi[i];
722 a->writer_conf = para_malloc(nw * sizeof(void *));
723 a->writers = para_malloc(nw * sizeof(struct writer *));
724 a->num_writers = 0;
725 }
726 for (i = 0; i < conf.writer_given; i++) {
727 void *wconf;
728 int writer_num;
729 ret = parse_stream_command(conf.writer_arg[i], &cmd);
730 if (ret < 0)
731 goto out;
732 a = &afi[ret];
733 nw = a->num_writers;
734 wconf = check_writer_arg(cmd, &writer_num);
735 if (!wconf) {
736 ret = writer_num;
737 goto out;
738 }
739 a->writers[nw] = &writers[writer_num];
740 a->writer_conf[nw] = wconf;
741 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
742 nw, writer_names[writer_num]);
743 a->num_writers++;
744 }
745 ret = 1;
746 out:
747 return ret;
748 }
749
750 static int init_receivers(void)
751 {
752 int i, ret, receiver_num;
753 char *cmd = NULL;
754 struct audio_format_info *a;
755
756 for (i = 0; receivers[i].name; i++) {
757 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
758 receivers[i].init(&receivers[i]);
759 }
760 for (i = conf.receiver_given - 1; i >= 0; i--) {
761 char *arg = conf.receiver_arg[i];
762 char *recv_arg = strchr(arg, ':');
763 PARA_INFO_LOG("arg: %s\n", arg);
764 ret = -E_MISSING_COLON;
765 if (!recv_arg)
766 goto out;
767 *recv_arg = '\0';
768 recv_arg++;
769 ret = get_audio_format_num(arg);
770 if (ret < 0)
771 goto out;
772 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
773 if (!afi[ret].receiver_conf) {
774 ret = -E_RECV_SYNTAX;
775 goto out;
776 }
777 afi[ret].receiver = &receivers[receiver_num];
778 }
779 /* use the first available receiver with no arguments
780 * for those audio formats for which no receiver
781 * was specified
782 */
783 cmd = para_strdup(receivers[0].name);
784 FOR_EACH_AUDIO_FORMAT(i) {
785 a = &afi[i];
786 if (a->receiver_conf)
787 continue;
788 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
789 if (!a->receiver_conf)
790 return -E_RECV_SYNTAX;
791 a->receiver = &receivers[receiver_num];
792 }
793 ret = 1;
794 out:
795 free(cmd);
796 return ret;
797 }
798
799 static int init_default_filters(void)
800 {
801 int i, ret = 1;
802
803 FOR_EACH_AUDIO_FORMAT(i) {
804 struct audio_format_info *a = &afi[i];
805 char *tmp;
806 int j;
807
808 if (a->num_filters)
809 continue; /* no default -- nothing to to */
810 /* add "dec" to audio format name */
811 tmp = make_message("%sdec", audio_formats[i]);
812 for (j = 0; filters[j].name; j++)
813 if (!strcmp(tmp, filters[j].name))
814 break;
815 free(tmp);
816 ret = -E_UNSUPPORTED_FILTER;
817 if (!filters[j].name)
818 goto out;
819 tmp = para_strdup(filters[j].name);
820 ret = add_filter(i, tmp);
821 free(tmp);
822 if (ret < 0)
823 goto out;
824 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
825 filters[j].name);
826 }
827 out:
828 return ret;
829 }
830
831 static int init_filters(void)
832 {
833 int i, ret, nf;
834
835 filter_init(filters);
836 nf = PARA_MAX(1, conf.filter_given);
837 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
838 FOR_EACH_AUDIO_FORMAT(i) {
839 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
840 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
841 }
842 if (!conf.no_default_filters_given)
843 return init_default_filters();
844 for (i = 0; i < conf.filter_given; i++) {
845 char *arg = conf.filter_arg[i];
846 char *filter_name = strchr(arg, ':');
847 ret = -E_MISSING_COLON;
848 if (!filter_name)
849 goto out;
850 *filter_name = '\0';
851 filter_name++;
852 ret = get_audio_format_num(arg);
853 if (ret < 0)
854 goto out;
855 ret = add_filter(ret, filter_name);
856 if (ret < 0)
857 goto out;
858 }
859 ret = init_default_filters(); /* use default values for the rest */
860 out:
861 return ret;
862 }
863
864 static int init_stream_io(void)
865 {
866 int ret;
867
868 ret = init_writers();
869 if (ret < 0)
870 return ret;
871 ret = init_receivers();
872 if (ret < 0)
873 return ret;
874 ret = init_filters();
875 if (ret < 0)
876 return ret;
877 return 1;
878 }
879
880 static int audiod_get_socket(void)
881 {
882 struct sockaddr_un unix_addr;
883 int fd;
884
885 if (conf.socket_given)
886 socket_name = para_strdup(conf.socket_arg);
887 else {
888 char *hn = para_hostname();
889 socket_name = make_message("/var/paraslash/audiod_socket.%s",
890 hn);
891 free(hn);
892 }
893 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
894 if (conf.force_given)
895 unlink(socket_name);
896 fd = create_pf_socket(socket_name, &unix_addr,
897 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
898 if (fd < 0) {
899 PARA_EMERG_LOG("%s", "can not connect to socket\n");
900 exit(EXIT_FAILURE); /* do not unlink socket */
901 }
902 if (listen(fd , 5) < 0) {
903 PARA_EMERG_LOG("%s", "can not listen on socket\n");
904 exit(EXIT_FAILURE); /* do not unlink socket */
905 }
906 mark_fd_nonblock(fd);
907 return fd;
908 }
909
910 static void signal_event_handler(struct task *t)
911 {
912 struct signal_task *st = t->private_data;
913
914 if (t->ret != -E_SIGNAL_CAUGHT)
915 PARA_ERROR_LOG("%s (ignored)\n", PARA_STRERROR(-t->ret));
916 else
917 handle_signal(st->signum);
918 }
919
920 static void signal_pre_select(struct sched *s, struct task *t)
921 {
922 struct signal_task *st = t->private_data;
923 t->ret = 1;
924 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
925 }
926
927 static void signal_post_select(struct sched *s, struct task *t)
928 {
929 struct signal_task *st = t->private_data;
930 t->ret = 1;
931 if (!FD_ISSET(st->fd, &s->rfds))
932 return;
933 t->ret = -E_SIGNAL_CAUGHT;
934 st->signum = para_next_signal();
935 }
936
937 static void signal_setup_default(struct signal_task *st)
938 {
939 st->task.pre_select = signal_pre_select;
940 st->task.post_select = signal_post_select;
941 st->task.private_data = st;
942 sprintf(st->task.status, "signal task");
943 }
944
945 static void command_pre_select(struct sched *s, struct task *t)
946 {
947 struct command_task *ct = t->private_data;
948 t->ret = 1;
949 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
950
951 }
952
953 static void command_post_select(struct sched *s, struct task *t)
954 {
955 int ret;
956 struct command_task *ct = t->private_data;
957
958 t->ret = 1; /* always successful */
959 if (audiod_status != AUDIOD_OFF)
960 audiod_status_dump();
961 if (!FD_ISSET(ct->fd, &s->rfds))
962 return;
963 ret = handle_connect(ct->fd);
964 if (ret < 0)
965 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
966 }
967
968 static void init_command_task(struct command_task *ct)
969 {
970 ct->task.pre_select = command_pre_select;
971 ct->task.post_select = command_post_select;
972 ct->task.event_handler = NULL;
973 ct->task.private_data = ct;
974 ct->fd = audiod_get_socket(); /* doesn't return on errors */
975 sprintf(ct->task.status, "command task");
976 }
977
978 static void client_task_event_handler(__a_unused struct task *t)
979 {
980 struct private_client_data *pcd = t->private_data;
981 if (t->ret == -E_HANDSHAKE_COMPLETE)
982 return;
983 unregister_task(t);
984 pcd->eof = 1;
985 }
986
987 static void status_event_handler(__a_unused struct task *t)
988 {
989 struct timeval delay = {1, 0};
990 int i;
991 struct status_task *st = t->private_data;
992
993 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-t->ret));
994 close_stat_pipe();
995 /* avoid busy loop if server is down */
996 tv_add(now, &delay, &st->restart_barrier);
997 FOR_EACH_AUDIO_FORMAT(i)
998 afi[i].restart_barrier = st->restart_barrier;
999 }
1000
1001 static void status_pre_select(struct sched *s, struct task *t)
1002 {
1003 struct status_task *st = t->private_data;
1004 int argc = 2;
1005 char *argv[] = {"audiod", "stat", NULL};
1006 t->ret = 1;
1007 if (st->pcd && (audiod_status == AUDIOD_OFF || st->pcd->eof))
1008 close_stat_pipe();
1009 if (!st->pcd && audiod_status != AUDIOD_OFF
1010 && tv_diff(now, &st->restart_barrier, NULL) > 0) {
1011 t->ret = client_parse_config(argc, argv, &st->pcd);
1012 if (t->ret < 0)
1013 return;
1014 t->ret = client_open(st->pcd);
1015 if (t->ret < 0)
1016 return;
1017 st->pcd->task.event_handler = client_task_event_handler;
1018 s->timeout.tv_sec = 0;
1019 s->timeout.tv_usec = 1;
1020 }
1021 }
1022
1023 static void status_post_select(__a_unused struct sched *s, struct task *t)
1024 {
1025 struct status_task *st = t->private_data;
1026
1027 t->ret = 1;
1028 if (!st->pcd || !st->pcd->loaded
1029 || st->pcd->status != CL_RECEIVING)
1030 return;
1031 st->pcd->loaded = for_each_line(st->pcd->buf, st->pcd->loaded,
1032 &check_stat_line);
1033 }
1034
1035 static void init_status_task(struct status_task *st)
1036 {
1037 memset(st, 0, sizeof(struct status_task));
1038 st->task.pre_select = status_pre_select;
1039 st->task.post_select = status_post_select;
1040 st->task.event_handler = status_event_handler;
1041 st->task.private_data = st;
1042 st->sa_time_diff_sign = 1;
1043 sprintf(st->task.status, "status task");
1044 }
1045
1046 static void set_initial_status(void)
1047 {
1048 audiod_status = AUDIOD_ON;
1049 if (!conf.mode_given)
1050 return;
1051 if (!strcmp(conf.mode_arg, "sb")) {
1052 audiod_status = AUDIOD_STANDBY;
1053 return;
1054 }
1055 if (!strcmp(conf.mode_arg, "off")) {
1056 audiod_status = AUDIOD_OFF;
1057 return;
1058 }
1059 if (strcmp(conf.mode_arg, "on"))
1060 PARA_WARNING_LOG("%s", "invalid mode\n");
1061 }
1062
1063 int main(int argc, char *argv[])
1064 {
1065 char *cf;
1066 int ret, i;
1067 struct sched s;
1068 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1069 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1070
1071 valid_fd_012();
1072 audiod_cmdline_parser(argc, argv, &conf);
1073 para_drop_privileges(conf.user_arg, conf.group_arg);
1074 cf = configfile_exists();
1075 if (cf) {
1076 if (audiod_cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1077 PARA_EMERG_LOG("%s", "parse error in config file\n");
1078 exit(EXIT_FAILURE);
1079 }
1080 }
1081 if (conf.logfile_given)
1082 logfile = open_log(conf.logfile_arg);
1083 log_welcome("para_audiod", conf.loglevel_arg);
1084 i = init_stream_io();
1085 if (i < 0) {
1086 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1087 exit(EXIT_FAILURE);
1088 }
1089 server_uptime(UPTIME_SET);
1090 set_initial_status();
1091 FOR_EACH_SLOT(i)
1092 clear_slot(i);
1093 init_grabbing();
1094 setup_signal_handling();
1095 signal_setup_default(sig_task);
1096 sig_task->task.event_handler = signal_event_handler;
1097
1098 init_status_task(stat_task);
1099 init_command_task(cmd_task);
1100 init_audiod_task(audiod_task);
1101
1102 if (conf.daemon_given)
1103 daemon_init();
1104
1105 register_task(&sig_task->task);
1106 register_task(&cmd_task->task);
1107 register_task(&stat_task->task);
1108 register_task(audiod_task);
1109 s.default_timeout.tv_sec = 0;
1110 s.default_timeout.tv_usec = 99 * 1000;
1111 ret = sched(&s);
1112
1113 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1114 return EXIT_FAILURE;
1115 }