bcead91ff11ab61582f8fd1b98197cc96433d608
[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 *af_status, /* the audio format announced in server status */
75 *socket_name;
76 static FILE *logfile;
77 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
78
79 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
80
81 static struct status_task status_task_struct;
82 struct status_task *stat_task = &status_task_struct;
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 struct signal_task {
97 int fd;
98 int signum;
99 struct task task;
100 };
101
102 /** iterate over all supported audio formats */
103 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
104
105 /**
106 * get the audio format number
107 * \param name the name of the audio format
108 *
109 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
110 * \a name is not a supported audio format.
111 */
112 int get_audio_format_num(char *name)
113 {
114 int i;
115 FOR_EACH_AUDIO_FORMAT(i)
116 if (!strcmp(name, audio_formats[i]))
117 return i;
118 return -E_UNSUPPORTED_AUDIO_FORMAT;
119 }
120
121 /*
122 * log function. first argument is loglevel.
123 */
124 void para_log(int ll, const char* fmt,...)
125 {
126 va_list argp;
127 FILE *outfd;
128 struct tm *tm;
129 time_t t1;
130 char str[MAXLINE] = "";
131 static char *hostname;
132
133 if (ll < conf.loglevel_arg)
134 return;
135 if (!hostname)
136 hostname = para_hostname();
137 outfd = logfile? logfile : stderr;
138 time(&t1);
139 tm = localtime(&t1);
140 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
141 fprintf(outfd, "%s %s ", str, hostname);
142 if (conf.loglevel_arg <= INFO)
143 fprintf(outfd, "%i ", ll);
144 va_start(argp, fmt);
145 vfprintf(outfd, fmt, argp);
146 va_end(argp);
147 }
148
149 static char *configfile_exists(void)
150 {
151 static char *config_file;
152
153 if (!config_file) {
154 char *home = para_homedir();
155 config_file = make_message("%s/.paraslash/audiod.conf", home);
156 free(home);
157 }
158 return file_exists(config_file)? config_file : NULL;
159 }
160
161 static void setup_signal_handling(void)
162 {
163 sig_task->fd = para_signal_init();
164 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
165 para_install_sighandler(SIGINT);
166 para_install_sighandler(SIGTERM);
167 para_install_sighandler(SIGCHLD);
168 para_install_sighandler(SIGHUP);
169 para_install_sighandler(SIGPIPE);
170 // signal(SIGPIPE, SIG_IGN);
171 }
172
173 static void clear_slot(int slot_num)
174 {
175 struct slot_info *s = &slot[slot_num];
176
177 PARA_INFO_LOG("clearing slot %d\n", slot_num);
178 memset(s, 0, sizeof(struct slot_info));
179 s->format = -1;
180 }
181
182 static void close_receiver(int slot_num)
183 {
184 struct slot_info *s = &slot[slot_num];
185 struct audio_format_info *a;
186 const struct timeval restart_delay = {0, 200 * 1000};
187
188 if (s->format < 0 || !s->receiver_node)
189 return;
190 a = &afi[s->format];
191 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
192 audio_formats[s->format] , slot_num, s->receiver_node->eof);
193 // if (!s->receiver_node->eof)
194 // unregister_task(&s->receiver_node->task);
195 a->receiver->close(s->receiver_node);
196 free(s->receiver_node);
197 s->receiver_node = NULL;
198 /* set restart barrier */
199 tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
200 }
201
202 static void kill_all_decoders(void)
203 {
204 int i;
205
206 FOR_EACH_SLOT(i) {
207 struct slot_info *s = &slot[i];
208 if (s->wng && !s->wng->eof) {
209 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
210 i);
211 wng_unregister(s->wng);
212 s->wng->eof = 1;
213 }
214 if (s->fc && !s->fc->eof) {
215 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
216 unregister_task(&s->fc->task);
217 s->fc->eof = 1;
218 }
219 if (s->receiver_node && !s->receiver_node->eof) {
220 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
221 unregister_task(&s->receiver_node->task);
222 s->receiver_node->eof = 1;
223 }
224 }
225 }
226
227 static int get_empty_slot(void)
228 {
229 int i;
230 struct slot_info *s;
231
232 FOR_EACH_SLOT(i) {
233 s = &slot[i];
234 if (s->format < 0) {
235 clear_slot(i);
236 return i;
237 }
238 if (s->wng || s->receiver_node || s->fc)
239 continue;
240 clear_slot(i);
241 return i;
242 }
243 return -E_NO_MORE_SLOTS;
244 }
245
246 static int decoder_running(int format)
247 {
248 int i, ret = 0;
249 struct slot_info *s;
250
251 FOR_EACH_SLOT(i) {
252 s = &slot[i];
253 if (s->format == format && s->receiver_node)
254 ret |= 1;
255 if (s->format == format && s->wng)
256 ret |= 2;
257 }
258 return ret;
259 }
260
261 static void close_stat_pipe(void)
262 {
263 int i;
264
265 if (stat_task->fd < 0)
266 return;
267 PARA_NOTICE_LOG("%s", "closing status pipe\n");
268 close(stat_task->fd);
269 del_close_on_fork_list(stat_task->fd);
270 stat_task->fd = -1;
271 // kill_all_decoders();
272 for (i = 0; i < NUM_STAT_ITEMS; i++) {
273 free(stat_task->stat_item_values[i]);
274 stat_task->stat_item_values[i] = NULL;
275 }
276 dump_empty_status();
277 stat_task->length_seconds = 0;
278 stat_task->offset_seconds = 0;
279 audiod_status_dump();
280 stat_task->playing = 0;
281 stat_task->stat_item_values[SI_STATUS_BAR] = make_message(
282 "%s:no connection to para_server\n",
283 status_item_list[SI_STATUS_BAR]);
284 stat_client_write(stat_task->stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
285 }
286
287 void __noreturn clean_exit(int status, const char *msg)
288 {
289 PARA_EMERG_LOG("%s\n", msg);
290 if (socket_name)
291 unlink(socket_name);
292 if (stat_task->fd >= 0)
293 close_stat_pipe();
294 exit(status);
295 }
296
297 /**
298 * get the number of filters
299 *
300 * \param audio_format_num the number identifying the audio format
301 *
302 * \return the number of filters for the given audio format
303 *
304 * \sa struct filter;
305 */
306 int num_filters(int audio_format_num)
307 {
308 return afi[audio_format_num].num_filters;
309 }
310
311 static void filter_event_handler(struct task *t)
312 {
313 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
314 struct filter_chain *fc = t->private_data;
315 fc->eof = 1;
316 unregister_task(t);
317 }
318
319 static void open_filters(int slot_num)
320 {
321 struct slot_info *s = &slot[slot_num];
322 struct audio_format_info *a = &afi[s->format];
323 int nf = a->num_filters;
324 int i;
325
326 s->fc = NULL;
327 if (!nf)
328 return;
329 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
330 s->fc = para_calloc(sizeof(struct filter_chain));
331 INIT_LIST_HEAD(&s->fc->filters);
332 s->fc->inbuf = s->receiver_node->buf;
333 s->fc->in_loaded = &s->receiver_node->loaded;
334 s->fc->input_eof = &s->receiver_node->eof;
335 s->fc->task.pre_select = filter_pre_select;
336 s->fc->task.event_handler = filter_event_handler;
337 s->fc->task.private_data = s->fc;
338 s->fc->eof = 0;
339
340 s->receiver_node->output_eof = &s->fc->eof;
341 sprintf(s->fc->task.status, "filter chain");
342 for (i = 0; i < nf; i++) {
343 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
344 fn->conf = a->filter_conf[i];
345 fn->fc = s->fc;
346 fn->filter = a->filters[i];
347 INIT_LIST_HEAD(&fn->callbacks);
348 list_add_tail(&fn->node, &s->fc->filters);
349 fn->filter->open(fn);
350 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
351 audio_formats[s->format], i + 1, nf,
352 fn->filter->name, slot_num);
353 s->fc->outbuf = fn->buf;
354 s->fc->out_loaded = &fn->loaded;
355 }
356 register_task(&s->fc->task);
357 }
358
359 static void wng_event_handler(struct task *t)
360 {
361 struct writer_node_group *wng = t->private_data;
362
363 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
364 wng->eof = 1;
365 wng_unregister(wng);
366 }
367
368 static void open_writers(int slot_num)
369 {
370 int ret, i;
371 struct slot_info *s = &slot[slot_num];
372 struct audio_format_info *a = &afi[s->format];
373
374 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
375 if (!a->num_writers)
376 s->wng = setup_default_wng();
377 else
378 s->wng = wng_new(a->num_writers);
379 if (s->fc) {
380 s->wng->buf = s->fc->outbuf;
381 s->wng->loaded = s->fc->out_loaded;
382 s->wng->input_eof = &s->fc->eof;
383 s->wng->channels = &s->fc->channels;
384 s->wng->samplerate = &s->fc->samplerate;
385 s->fc->output_eof = &s->wng->eof;
386 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
387 } else {
388 s->wng->buf = s->receiver_node->buf;
389 s->wng->loaded = &s->receiver_node->loaded;
390 s->wng->input_eof = &s->receiver_node->eof;
391 }
392 s->wng->task.event_handler = wng_event_handler;
393 for (i = 0; i < a->num_writers; i++) {
394 s->wng->writer_nodes[i].conf = a->writer_conf[i];
395 s->wng->writer_nodes[i].writer = a->writers[i];
396 }
397 ret = wng_open(s->wng);
398 if (ret < 0) {
399 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
400 return;
401 }
402 s->wstime = *now;
403 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
404 }
405
406 static void rn_event_handler(struct task *t)
407 {
408 struct receiver_node *rn = t->private_data;
409
410 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
411 unregister_task(t);
412 rn->eof = 1;
413 }
414
415 static void open_receiver(int format)
416 {
417 struct audio_format_info *a = &afi[format];
418 struct slot_info *s;
419 int ret, slot_num;
420 struct receiver_node *rn;
421
422 slot_num = get_empty_slot();
423 if (slot_num < 0)
424 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
425 s = &slot[slot_num];
426 s->format = format;
427 s->receiver_node = para_calloc(sizeof(struct receiver_node));
428 rn = s->receiver_node;
429 rn->receiver = a->receiver;
430 rn->conf = a->receiver_conf;
431 ret = a->receiver->open(s->receiver_node);
432 if (ret < 0) {
433 PARA_ERROR_LOG("failed to open receiver (%s)\n",
434 PARA_STRERROR(-ret));
435 free(s->receiver_node);
436 s->receiver_node = NULL;
437 return;
438 }
439 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
440 audio_formats[s->format], a->receiver->name, slot_num);
441 rn->task.private_data = s->receiver_node;
442 rn->task.pre_select = a->receiver->pre_select;
443 rn->task.post_select = a->receiver->post_select;
444 rn->task.event_handler = rn_event_handler;
445 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
446 register_task(&rn->task);
447 }
448
449 static int open_current_receiver(struct sched *s)
450 {
451 int i;
452 struct timeval diff;
453
454 if (!af_status)
455 return 0;
456 i = get_audio_format_num(af_status);
457 if (i < 0)
458 return 0;
459 if (decoder_running(i))
460 return 0;
461 if (tv_diff(now, &afi[i].restart_barrier, &diff) < 0) {
462 s->timeout = diff;
463 return 0;
464 }
465 open_receiver(i);
466 return 1;
467 }
468
469 static void compute_time_diff(const struct timeval *status_time)
470 {
471 struct timeval tmp, diff;
472 static int count;
473 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
474 const struct timeval max_deviation = {0, 500 * 1000};
475 const int time_smooth = 5;
476
477 sign = tv_diff(status_time, now, &diff);
478 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
479 // sign, sa_time_diff_sign);
480 if (!count) {
481 sa_time_diff_sign = sign;
482 stat_task->sa_time_diff = diff;
483 count++;
484 return;
485 }
486 if (count > 5) {
487 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
488 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
489 PARA_WARNING_LOG("time diff jump: %lims\n",
490 s * tv2ms(&tmp));
491 }
492 count++;
493 sa_time_diff_sign = tv_convex_combination(
494 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
495 count > 10? sign : sign * time_smooth, &diff,
496 &tmp);
497 stat_task->sa_time_diff = tmp;
498 PARA_DEBUG_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
499 sign > 0? "+" : "-",
500 tv2ms(&diff),
501 sa_time_diff_sign ? "+" : "-",
502 tv2ms(&stat_task->sa_time_diff)
503 );
504 }
505
506 static void check_stat_line(char *line)
507 {
508 int itemnum;
509 size_t ilen = 0;
510 long unsigned sec, usec;
511 char *tmp;
512
513 // PARA_INFO_LOG("line: %s\n", line);
514 if (!line)
515 return;
516 itemnum = stat_line_valid(line);
517 if (itemnum < 0) {
518 PARA_WARNING_LOG("invalid status line: %s\n", line);
519 return;
520 }
521 tmp = make_message("%s\n", line);
522 stat_client_write(tmp, itemnum);
523 free(tmp);
524 free(stat_task->stat_item_values[itemnum]);
525 stat_task->stat_item_values[itemnum] = para_strdup(line);
526 ilen = strlen(status_item_list[itemnum]);
527 switch (itemnum) {
528 case SI_STATUS:
529 stat_task->playing = strstr(line, "playing")? 1 : 0;
530 break;
531 case SI_FORMAT:
532 free(af_status);
533 af_status = para_strdup(line + ilen + 1);
534 break;
535 case SI_OFFSET:
536 stat_task->offset_seconds = atoi(line + ilen + 1);
537 break;
538 case SI_LENGTH:
539 stat_task->length_seconds = atoi(line + ilen + 1);
540 break;
541 case SI_STREAM_START:
542 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
543 stat_task->server_stream_start.tv_sec = sec;
544 stat_task->server_stream_start.tv_usec = usec;
545 }
546 break;
547 case SI_CURRENT_TIME:
548 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
549 struct timeval tv = {sec, usec};
550 compute_time_diff(&tv);
551 }
552 break;
553 }
554 }
555
556 static void handle_signal(int sig)
557 {
558 switch (sig) {
559 case SIGCHLD:
560 for (;;) {
561 pid_t pid = para_reap_child();
562 if (pid <= 0)
563 return;
564 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
565 }
566 case SIGINT:
567 case SIGTERM:
568 case SIGHUP:
569 PARA_EMERG_LOG("terminating on signal %d\n", sig);
570 clean_exit(EXIT_FAILURE, "caught deadly signal");
571 return;
572 }
573 }
574
575 static void try_to_close_slot(int slot_num)
576 {
577 struct slot_info *s = &slot[slot_num];
578
579 if (s->format < 0)
580 return;
581 if (s->receiver_node && !s->receiver_node->eof)
582 return;
583 if (s->fc && !s->fc->eof)
584 return;
585 if (s->wng && !s->wng->eof)
586 return;
587 PARA_INFO_LOG("closing slot %d \n", slot_num);
588 wng_close(s->wng);
589 close_filters(s->fc);
590 free(s->fc);
591 close_receiver(slot_num);
592 clear_slot(slot_num);
593 }
594
595 /*
596 * Check if any receivers/filters/writers need to be started and do so if
597 * neccessary. Since the pre_select function didn't have a chance yet to put
598 * file descriptors into the fd sets given by s, make the upcoming select()
599 * return immediately to avoid a long timeout in case we started something.
600 */
601 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
602 {
603 int i;
604 struct timeval min_delay = {0, 1};
605
606 t->ret = 1;
607 if (audiod_status != AUDIOD_ON || !stat_task->playing)
608 return kill_all_decoders();
609 if (open_current_receiver(s))
610 s->timeout = min_delay;
611 FOR_EACH_SLOT(i) {
612 struct slot_info *sl = &slot[i];
613 struct audio_format_info *a;
614
615 if (sl->format < 0)
616 continue;
617 a = &afi[sl->format];
618 if (!sl->receiver_node)
619 continue;
620 if (!a->num_filters) {
621 if (sl->receiver_node->loaded && !sl->wng) {
622 open_writers(i);
623 s->timeout = min_delay;
624 }
625 continue;
626 }
627 if (sl->receiver_node->loaded && !sl->fc) {
628 open_filters(i);
629 s->timeout = min_delay;
630 continue;
631 }
632 if (sl->fc && *sl->fc->out_loaded && !sl->wng) {
633 open_writers(i);
634 s->timeout = min_delay;
635 }
636 }
637 }
638
639 static void audiod_post_select(__a_unused struct sched *s,
640 __a_unused struct task *t)
641 {
642 int i;
643
644 /* save away the current time for other users */
645 t->ret = 1;
646 FOR_EACH_SLOT(i)
647 try_to_close_slot(i);
648 }
649
650 static void init_audiod_task(struct task *t)
651 {
652 t->pre_select = audiod_pre_select;
653 t->post_select = audiod_post_select;
654 t->event_handler = NULL;
655 t->private_data = t;
656 sprintf(t->status, "audiod task");
657 }
658
659 static int parse_stream_command(const char *txt, char **cmd)
660 {
661 char *p = strchr(txt, ':');
662 int i;
663
664 if (!p)
665 return -E_MISSING_COLON;
666 p++;
667 FOR_EACH_AUDIO_FORMAT(i) {
668 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
669 continue;
670 *cmd = p;
671 return i;
672 }
673 return -E_UNSUPPORTED_AUDIO_FORMAT;
674 }
675
676 static int add_filter(int format, char *cmdline)
677 {
678 struct audio_format_info *a = &afi[format];
679 int filter_num, nf = a->num_filters;
680
681 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
682 if (filter_num < 0)
683 return filter_num;
684 a->filters[nf] = &filters[filter_num];
685 a->num_filters++;
686 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
687 a->filters[nf]->name);
688 return filter_num;
689 }
690
691 static int init_writers(void)
692 {
693 int i, ret, nw;
694 char *cmd;
695 struct audio_format_info *a;
696
697 init_supported_writers();
698 nw = PARA_MAX(1, conf.writer_given);
699 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
700 FOR_EACH_AUDIO_FORMAT(i) {
701 a = &afi[i];
702 a->writer_conf = para_malloc(nw * sizeof(void *));
703 a->writers = para_malloc(nw * sizeof(struct writer *));
704 a->num_writers = 0;
705 }
706 for (i = 0; i < conf.writer_given; i++) {
707 void *wconf;
708 int writer_num;
709 ret = parse_stream_command(conf.writer_arg[i], &cmd);
710 if (ret < 0)
711 goto out;
712 a = &afi[ret];
713 nw = a->num_writers;
714 wconf = check_writer_arg(cmd, &writer_num);
715 if (!wconf) {
716 ret = writer_num;
717 goto out;
718 }
719 a->writers[nw] = &writers[writer_num];
720 a->writer_conf[nw] = wconf;
721 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
722 nw, writer_names[writer_num]);
723 a->num_writers++;
724 }
725 ret = 1;
726 out:
727 return ret;
728 }
729
730 static int init_receivers(void)
731 {
732 int i, ret, receiver_num;
733 char *cmd = NULL;
734 struct audio_format_info *a;
735
736 for (i = 0; receivers[i].name; i++) {
737 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
738 receivers[i].init(&receivers[i]);
739 }
740 for (i = 0; i < conf.receiver_given; i++) {
741 char *arg = conf.receiver_arg[i];
742 char *recv = strchr(arg, ':');
743 ret = -E_MISSING_COLON;
744 if (!recv)
745 goto out;
746 *recv = '\0';
747 recv++;
748 ret = get_audio_format_num(arg);
749 if (ret < 0)
750 goto out;
751 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
752 if (!afi[ret].receiver_conf) {
753 ret = -E_RECV_SYNTAX;
754 goto out;
755 }
756 afi[ret].receiver = &receivers[receiver_num];
757 }
758 /* use the first available receiver with no arguments
759 * for those audio formats for which no receiver
760 * was specified
761 */
762 cmd = para_strdup(receivers[0].name);
763 FOR_EACH_AUDIO_FORMAT(i) {
764 a = &afi[i];
765 if (a->receiver_conf)
766 continue;
767 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
768 if (!a->receiver_conf)
769 return -E_RECV_SYNTAX;
770 a->receiver = &receivers[receiver_num];
771 }
772 ret = 1;
773 out:
774 free(cmd);
775 return ret;
776 }
777
778 static int init_default_filters(void)
779 {
780 int i, ret = 1;
781
782 FOR_EACH_AUDIO_FORMAT(i) {
783 struct audio_format_info *a = &afi[i];
784 char *tmp;
785 int j;
786
787 if (a->num_filters)
788 continue; /* no default -- nothing to to */
789 /* add "dec" to audio format name */
790 tmp = make_message("%sdec", audio_formats[i]);
791 for (j = 0; filters[j].name; j++)
792 if (!strcmp(tmp, filters[j].name))
793 break;
794 free(tmp);
795 ret = -E_UNSUPPORTED_FILTER;
796 if (!filters[j].name)
797 goto out;
798 tmp = para_strdup(filters[j].name);
799 ret = add_filter(i, tmp);
800 free(tmp);
801 if (ret < 0)
802 goto out;
803 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
804 filters[j].name);
805 }
806 out:
807 return ret;
808 }
809
810 static int init_filters(void)
811 {
812 int i, ret, nf;
813
814 filter_init(filters);
815 nf = PARA_MAX(1, conf.filter_given);
816 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
817 FOR_EACH_AUDIO_FORMAT(i) {
818 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
819 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
820 }
821 if (!conf.no_default_filters_given)
822 return init_default_filters();
823 for (i = 0; i < conf.filter_given; i++) {
824 char *arg = conf.filter_arg[i];
825 char *filter_name = strchr(arg, ':');
826 ret = -E_MISSING_COLON;
827 if (!filter_name)
828 goto out;
829 *filter_name = '\0';
830 filter_name++;
831 ret = get_audio_format_num(arg);
832 if (ret < 0)
833 goto out;
834 ret = add_filter(ret, filter_name);
835 if (ret < 0)
836 goto out;
837 }
838 ret = init_default_filters(); /* use default values for the rest */
839 out:
840 return ret;
841 }
842
843 static int init_stream_io(void)
844 {
845 int ret;
846
847 ret = init_writers();
848 if (ret < 0)
849 return ret;
850 ret = init_receivers();
851 if (ret < 0)
852 return ret;
853 ret = init_filters();
854 if (ret < 0)
855 return ret;
856 return 1;
857 }
858
859 static int audiod_get_socket(void)
860 {
861 struct sockaddr_un unix_addr;
862 int fd;
863
864 if (conf.socket_given)
865 socket_name = para_strdup(conf.socket_arg);
866 else {
867 char *hn = para_hostname();
868 socket_name = make_message("/var/paraslash/audiod_socket.%s",
869 hn);
870 free(hn);
871 }
872 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
873 if (conf.force_given)
874 unlink(socket_name);
875 fd = create_pf_socket(socket_name, &unix_addr,
876 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
877 if (fd < 0) {
878 PARA_EMERG_LOG("%s", "can not connect to socket\n");
879 exit(EXIT_FAILURE); /* do not unlink socket */
880 }
881 if (listen(fd , 5) < 0) {
882 PARA_EMERG_LOG("%s", "can not listen on socket\n");
883 exit(EXIT_FAILURE); /* do not unlink socket */
884 }
885 add_close_on_fork_list(fd);
886 return fd;
887 }
888
889 static int open_stat_pipe(void)
890 {
891 int ret, fd[3] = {-1, 1, 0};
892 pid_t pid;
893 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
894 if (ret >= 0) {
895 ret = fd[1];
896 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
897 add_close_on_fork_list(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 init_sched();
1057
1058 valid_fd_012();
1059 cmdline_parser(argc, argv, &conf);
1060 para_drop_privileges(conf.user_arg, conf.group_arg);
1061 cf = configfile_exists();
1062 if (cf) {
1063 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1064 PARA_EMERG_LOG("%s", "parse error in config file\n");
1065 exit(EXIT_FAILURE);
1066 }
1067 }
1068 if (conf.logfile_given)
1069 logfile = open_log(conf.logfile_arg);
1070 log_welcome("para_audiod", conf.loglevel_arg);
1071 i = init_stream_io();
1072 if (i < 0) {
1073 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1074 exit(EXIT_FAILURE);
1075 }
1076 server_uptime(UPTIME_SET);
1077 set_initial_status();
1078 FOR_EACH_SLOT(i)
1079 clear_slot(i);
1080 init_grabbing();
1081 setup_signal_handling();
1082 signal_setup_default(sig_task);
1083 sig_task->task.event_handler = signal_event_handler;
1084
1085 init_status_task(stat_task);
1086 init_command_task(cmd_task);
1087 init_audiod_task(audiod_task);
1088
1089 if (conf.daemon_given)
1090 daemon_init();
1091
1092 register_task(&sig_task->task);
1093 register_task(&cmd_task->task);
1094 register_task(&stat_task->task);
1095 register_task(audiod_task);
1096 s.default_timeout.tv_sec = 3;
1097 s.default_timeout.tv_usec = 99 * 1000;
1098 ret = sched(&s);
1099
1100 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1101 return EXIT_FAILURE;
1102 }