more small audiod cleanups.
[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 /**
47 * the possible modes of operation
48 *
49 * - off: disconnect from para_server
50 * - on: receive status information from para_server and play the audio stream
51 * - sb: only receive status information but not the audio stream
52 */
53 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
54
55 /** defines how to handle one supported audio format */
56 struct audio_format_info {
57 /** pointer to the receiver for this audio format */
58 struct receiver *receiver;
59 /** the receiver configuration */
60 void *receiver_conf;
61 /** the number of filters that should be activated for this audio format */
62 unsigned int num_filters;
63 /** pointer to the array of filters to be activated */
64 struct filter **filters;
65 /** pointer to the array of filter configurations */
66 void **filter_conf;
67 /** the number of filters that should be activated for this audio format */
68 unsigned int num_writers;
69 /** pointer to the array of writers to be activated */
70 struct writer **writers;
71 /** pointer to the array of writer configurations */
72 void **writer_conf;
73 /** do not start receiver/filters/writer before this time */
74 struct timeval restart_barrier;
75 };
76
77 /**
78 * describes one instance of a receiver-filter-writer chain
79 *
80 * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
81 * writer_node, writer_node_group.
82 */
83 struct slot_info {
84 /** number of the audio format in this slot */
85 int format;
86 /** time of the last successful read from the receiver */
87 struct timeval rtime;
88 /** time the last write to the write fd happend */
89 struct timeval wtime;
90 /** writer start time */
91 struct timeval wstime;
92 /** the receiver info associated with this slot */
93 struct receiver_node *receiver_node;
94 /** the active filter chain */
95 struct filter_chain *fc;
96 /** the active writer node group */
97 struct writer_node_group *wng;
98 };
99 static struct slot_info slot[MAX_STREAM_SLOTS];
100
101 extern const char *status_item_list[NUM_STAT_ITEMS];
102
103 static struct gengetopt_args_info conf;
104 static struct timeval server_stream_start, sa_time_diff;
105 static int playing, current_decoder = -1,
106 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
107 sa_time_diff_sign = 1;
108 static char *af_status, /* the audio format announced in server status */
109 *socket_name, *hostname;
110 static char *stat_item_values[NUM_STAT_ITEMS];
111 static FILE *logfile;
112 static const struct timeval restart_delay = {0, 300 * 1000};
113 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
114 static struct timeval *now;
115
116 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
117
118 struct command_task {
119 int fd;
120 struct task task;
121 };
122 static struct command_task command_task_struct, *cmd_task = &command_task_struct;
123
124 struct status_task {
125 int fd;
126 struct task task;
127 char buf[STRINGSIZE];
128 unsigned loaded;
129 };
130 static struct status_task status_task_struct, *stat_task = &status_task_struct;
131
132 struct audiod_task {
133 struct task task;
134 };
135 static struct audiod_task audiod_task_struct, *at = &audiod_task_struct;
136
137 struct signal_task {
138 int fd;
139 int signum;
140 struct task task;
141 };
142
143
144 /** defines one command of para_audiod */
145 struct audiod_command {
146 /** the name of the command */
147 const char *name;
148 /** pointer to the function that handles the command */
149 int (*handler)(int, int, char**);
150 int (*line_handler)(int, char*);
151 /** one-line description of the command */
152 const char *description;
153 /** summary of the command line options */
154 const char *synopsis;
155 /** the long help text */
156 const char *help;
157 };
158 static int com_grab(int, char *);
159 static int com_cycle(int, int, char **);
160 static int com_help(int, int, char **);
161 static int com_off(int, int, char **);
162 static int com_on(int, int, char **);
163 static int com_sb(int, int, char **);
164 static int com_stat(int, int, char **);
165 static int com_term(int, int, char **);
166 static struct audiod_command cmds[] = {
167 {
168 .name = "cycle",
169 .handler = com_cycle,
170 .description = "switch to next mode",
171 .synopsis = "cycle",
172 .help =
173
174 "on -> standby -> off -> on\n"
175
176 },
177 {
178 .name = "grab",
179 .line_handler = com_grab,
180 .description = "grab the audio stream",
181 .synopsis = "-- grab [grab_options]",
182 .help =
183
184 "grab ('splice') the audio stream at any position in the filter \n"
185 "chain and send that data back to the client. Try\n"
186 "\t para_audioc -- grab -h\n"
187 "for the list of available options.\n"
188 },
189
190 {
191 .name = "help",
192 .handler = com_help,
193 .description = "display command list or help for given command",
194 .synopsis = "help [command]",
195 .help =
196
197 "When I was younger, so much younger than today, I never needed\n"
198 "anybody's help in any way. But now these days are gone, I'm not so\n"
199 "self assured. Now I find I've changed my mind and opened up the doors.\n"
200 "\n"
201 " -- Beatles: Help\n"
202
203 },
204 {
205 .name = "off",
206 .handler = com_off,
207 .description = "deactivate para_audiod",
208 .synopsis = "off",
209 .help =
210
211 "Close connection to para_server and stop all decoders.\n"
212
213 },
214 {
215 .name = "on",
216 .handler = com_on,
217 .description = "activate para_audiod",
218 .synopsis = "on",
219 .help =
220
221 "Establish connection to para_server, retrieve para_server's current\n"
222 "status. If playing, start corresponding decoder. Otherwise stop\n"
223 "all decoders.\n"
224
225 },
226 {
227 .name = "sb",
228 .handler = com_sb,
229 .description = "enter standby mode",
230 .synopsis = "sb",
231 .help =
232
233 "Stop all decoders but leave connection to para_server open.\n"
234
235 },
236 {
237 .name = "stat",
238 .handler = com_stat,
239 .description = "print status information",
240 .synopsis = "stat [item1 ...]",
241 .help =
242
243 "Dump given status items (all if none given) to stdout.\n"
244
245 },
246 {
247 .name = "term",
248 .handler = com_term,
249 .description = "terminate audiod",
250 .synopsis = "term",
251 .help =
252
253 "Stop all decoders, shut down connection to para_server and exit.\n"
254
255 },
256 {
257 .name = NULL,
258 }
259 };
260
261 /** iterate over all slots */
262 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
263 /** iterate over all supported audio formats */
264 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
265 /** iterate over the array of all audiod commands */
266 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
267
268 /**
269 * get the audio format number
270 * \param name the name of the audio format
271 *
272 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
273 * \a name is not a supported audio format.
274 */
275 int get_audio_format_num(char *name)
276 {
277 int i;
278 FOR_EACH_AUDIO_FORMAT(i)
279 if (!strcmp(name, audio_formats[i]))
280 return i;
281 return -E_UNSUPPORTED_AUDIO_FORMAT;
282 }
283
284 /*
285 * log function. first argument is loglevel.
286 */
287 void para_log(int ll, const char* fmt,...)
288 {
289 va_list argp;
290 FILE *outfd;
291 struct tm *tm;
292 time_t t1;
293 char str[MAXLINE] = "";
294
295 if (ll < conf.loglevel_arg)
296 return;
297 outfd = logfile? logfile : stderr;
298 time(&t1);
299 tm = localtime(&t1);
300 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
301 fprintf(outfd, "%s %s ", str, hostname);
302 if (conf.loglevel_arg <= INFO)
303 fprintf(outfd, "%i ", ll);
304 va_start(argp, fmt);
305 vfprintf(outfd, fmt, argp);
306 va_end(argp);
307 }
308
309 static int client_write(int fd, const char *buf)
310 {
311 size_t len = strlen(buf);
312 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
313 }
314
315 static char *get_time_string(struct timeval *newest_stime)
316 {
317 struct timeval diff, adj_stream_start, tmp;
318 int total = 0, use_server_time = 1;
319
320 if (!playing) {
321 if (length_seconds)
322 return NULL;
323 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
324 }
325 if (audiod_status == AUDIOD_OFF)
326 goto out;
327 if (sa_time_diff_sign > 0)
328 tv_diff(&server_stream_start, &sa_time_diff,
329 &adj_stream_start);
330 else
331 tv_add(&server_stream_start, &sa_time_diff,
332 &adj_stream_start);
333 tmp = adj_stream_start;
334 if (newest_stime && audiod_status == AUDIOD_ON) {
335 tv_diff(newest_stime, &adj_stream_start, &diff);
336 if (tv2ms(&diff) < 5000) {
337 tmp = *newest_stime;
338 use_server_time = 0;
339 }
340 }
341 tv_diff(now, &tmp, &diff);
342 total = diff.tv_sec + offset_seconds;
343 if (total > length_seconds)
344 total = length_seconds;
345 if (total < 0)
346 total = 0;
347 out:
348 return make_message(
349 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
350 status_item_list[SI_PLAY_TIME],
351 use_server_time? "~" : "",
352 total / 60,
353 total % 60,
354 (length_seconds - total) / 60,
355 (length_seconds - total) % 60,
356 length_seconds? (total * 100 + length_seconds / 2) /
357 length_seconds : 0,
358 length_seconds / 60,
359 length_seconds % 60
360 );
361 }
362
363 __malloc static char *audiod_status_string(void)
364 {
365 const char *status = (audiod_status == AUDIOD_ON)?
366 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
367 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
368 }
369
370 static struct timeval *wstime(void)
371 {
372 int i;
373 struct timeval *max = NULL;
374 FOR_EACH_SLOT(i) {
375 struct slot_info *s = &slot[i];
376 if (!s->wng)
377 continue;
378 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
379 continue;
380 max = &s->wstime;
381 }
382 return max;
383 }
384 __malloc static char *decoder_flags(void)
385 {
386 int i;
387 char decoder_flags[MAX_STREAM_SLOTS + 1];
388
389 FOR_EACH_SLOT(i) {
390 struct slot_info *s = &slot[i];
391 char flag = '0';
392 if (s->receiver_node)
393 flag += 1;
394 if (s->wng)
395 flag += 2;
396 decoder_flags[i] = flag;
397 }
398 decoder_flags[MAX_STREAM_SLOTS] = '\0';
399 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
400 decoder_flags);
401 }
402
403 static char *configfile_exists(void)
404 {
405 static char *config_file;
406
407 if (!config_file) {
408 char *home = para_homedir();
409 config_file = make_message("%s/.paraslash/audiod.conf", home);
410 free(home);
411 }
412 return file_exists(config_file)? config_file : NULL;
413 }
414
415 static void setup_signal_handling(void)
416 {
417 sig_task->fd = para_signal_init();
418 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
419 para_install_sighandler(SIGINT);
420 para_install_sighandler(SIGTERM);
421 para_install_sighandler(SIGCHLD);
422 para_install_sighandler(SIGHUP);
423 signal(SIGPIPE, SIG_IGN);
424 }
425
426 static void audiod_status_dump(void)
427 {
428 static char *p_ts, *p_us, *p_as, *p_df;
429 struct timeval *t = wstime();
430 char *us, *tmp = get_time_string(t);
431
432 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
433 stat_client_write(tmp, SI_PLAY_TIME);
434 free(p_ts);
435 p_ts = tmp;
436
437 us = uptime_str();
438 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
439 free(us);
440 if (!p_us || strcmp(p_us, tmp))
441 stat_client_write(tmp, SI_AUDIOD_UPTIME);
442 free(p_us);
443 p_us = tmp;
444
445 tmp = audiod_status_string();
446 if (!p_as || strcmp(p_as, tmp))
447 stat_client_write(tmp, SI_AUDIOD_STATUS);
448 free(p_as);
449 p_as = tmp;
450
451 tmp = decoder_flags();
452 if (!p_df || strcmp(p_df, tmp))
453 stat_client_write(tmp, SI_DECODER_FLAGS);
454 free(p_df);
455 p_df = tmp;
456 }
457
458 static void clear_slot(int slot_num)
459 {
460 struct slot_info *s = &slot[slot_num];
461
462 PARA_INFO_LOG("clearing slot %d\n", slot_num);
463 memset(s, 0, sizeof(struct slot_info));
464 s->format = -1;
465 }
466
467 static void close_receiver(int slot_num)
468 {
469 struct slot_info *s = &slot[slot_num];
470 struct audio_format_info *a;
471
472 if (s->format < 0 || !s->receiver_node)
473 return;
474 a = &afi[s->format];
475 PARA_NOTICE_LOG("closing %s recevier in slot %d (eof = %d)\n",
476 audio_formats[s->format] , slot_num, s->receiver_node->eof);
477 if (!s->receiver_node->eof)
478 unregister_task(&s->receiver_node->task);
479 a->receiver->close(s->receiver_node);
480 free(s->receiver_node);
481 s->receiver_node = NULL;
482 /* set restart barrier */
483 tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
484 }
485
486 static void kill_all_decoders(void)
487 {
488 int i;
489
490 FOR_EACH_SLOT(i) {
491 struct slot_info *s = &slot[i];
492 if (s->receiver_node)
493 s->receiver_node->eof = 1;
494 }
495 }
496
497 static int get_empty_slot(void)
498 {
499 int i;
500 struct slot_info *s;
501
502 FOR_EACH_SLOT(i) {
503 s = &slot[i];
504 if (s->format < 0) {
505 clear_slot(i);
506 return i;
507 }
508 if (s->wng || s->receiver_node || s->fc)
509 continue;
510 clear_slot(i);
511 return i;
512 }
513 return -E_NO_MORE_SLOTS;
514 }
515
516 static int decoder_running(int format)
517 {
518 int i, ret = 0;
519 struct slot_info *s;
520
521 FOR_EACH_SLOT(i) {
522 s = &slot[i];
523 if (s->format == format && s->receiver_node)
524 ret |= 1;
525 if (s->format == format && s->wng)
526 ret |= 2;
527 }
528 return ret;
529 }
530
531 static void close_stat_pipe(void)
532 {
533 int i;
534
535 if (stat_task->fd < 0)
536 return;
537 PARA_NOTICE_LOG("%s", "closing status pipe\n");
538 close(stat_task->fd);
539 del_close_on_fork_list(stat_task->fd);
540 stat_task->fd = -1;
541 kill_all_decoders();
542 for (i = 0; i < NUM_STAT_ITEMS; i++) {
543 free(stat_item_values[i]);
544 stat_item_values[i] = NULL;
545 }
546 dump_empty_status();
547 length_seconds = 0;
548 offset_seconds = 0;
549 audiod_status_dump();
550 playing = 0;
551 stat_item_values[SI_STATUS_BAR] = make_message(
552 "%s:no connection to para_server\n",
553 status_item_list[SI_STATUS_BAR]);
554 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
555 }
556
557 static void __noreturn clean_exit(int status, const char *msg)
558 {
559 PARA_EMERG_LOG("%s\n", msg);
560 kill_all_decoders();
561 if (socket_name)
562 unlink(socket_name);
563 if (stat_task->fd >= 0)
564 close_stat_pipe();
565 exit(status);
566 }
567
568 /**
569 * get the number of filters
570 *
571 * \param audio_format_num the number identifying the audio format
572 *
573 * \return the number of filters for the given audio format
574 *
575 * \sa struct filter;
576 */
577 int num_filters(int audio_format_num)
578 {
579 return afi[audio_format_num].num_filters;
580 }
581
582 static void filter_event_handler(struct task *t)
583 {
584 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
585 unregister_task(t);
586 }
587
588 static void open_filters(int slot_num)
589 {
590 struct slot_info *s = &slot[slot_num];
591 struct audio_format_info *a = &afi[s->format];
592 int nf = a->num_filters;
593 int i;
594
595 s->fc = NULL;
596 if (!nf)
597 return;
598 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
599 s->fc = para_calloc(sizeof(struct filter_chain));
600 INIT_LIST_HEAD(&s->fc->filters);
601 s->fc->inbuf = s->receiver_node->buf;
602 s->fc->in_loaded = &s->receiver_node->loaded;
603 s->fc->input_eof = &s->receiver_node->eof;
604
605 s->fc->task.pre_select = filter_pre_select;
606 s->fc->task.event_handler = filter_event_handler;
607 s->fc->task.private_data = s->fc;
608 s->fc->task.flags = 0;
609 s->fc->eof = 0;
610 sprintf(s->fc->task.status, "filter chain");
611 for (i = 0; i < nf; i++) {
612 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
613 fn->conf = a->filter_conf[i];
614 fn->fc = s->fc;
615 fn->filter = a->filters[i];
616 INIT_LIST_HEAD(&fn->callbacks);
617 list_add_tail(&fn->node, &s->fc->filters);
618 fn->filter->open(fn);
619 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
620 audio_formats[s->format], i + 1, nf,
621 fn->filter->name, slot_num);
622 s->fc->outbuf = fn->buf;
623 s->fc->out_loaded = &fn->loaded;
624 }
625 register_task(&s->fc->task);
626 // PARA_DEBUG_LOG("output loaded for filter chain %p: %p\n", s->fc,
627 // s->fc->out_loaded);
628 }
629
630 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
631 {
632 struct filter_node *fn;
633 int i, j;
634
635 FOR_EACH_SLOT(i) {
636 struct slot_info *s = &slot[i];
637 if (s->format < 0 || !s->fc)
638 continue;
639 if (slot_num >= 0 && slot_num != i)
640 continue;
641 if (format >= 0 && s->format != format)
642 continue;
643 if (num_filters(i) < filternum)
644 continue;
645 /* success */
646 j = 1;
647 list_for_each_entry(fn, &s->fc->filters, node)
648 if (filternum <= 0 || j++ == filternum)
649 break;
650 return fn;
651 }
652 return NULL;
653 }
654
655 static void wng_event_handler(struct task *t)
656 {
657 struct writer_node_group *g = t->private_data;
658 int i;
659
660 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
661 unregister_task(t);
662 FOR_EACH_SLOT(i) {
663 if (slot[i].wng != g)
664 continue;
665 wng_close(g);
666 wng_destroy(g);
667 slot[i].wng = NULL;
668 }
669 }
670
671 static void open_writer(int slot_num)
672 {
673 int ret, i;
674 struct slot_info *s = &slot[slot_num];
675 struct audio_format_info *a = &afi[s->format];
676
677 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
678 if (!a->num_writers)
679 s->wng = setup_default_wng();
680 else
681 s->wng = wng_new(a->num_writers);
682 if (s->fc) {
683 s->wng->buf = s->fc->outbuf;
684 s->wng->loaded = s->fc->out_loaded;
685 s->wng->input_eof = &s->fc->eof;
686 s->fc->output_eof = &s->wng->eof;
687 } else {
688 s->wng->buf = s->receiver_node->buf;
689 s->wng->loaded = &s->receiver_node->loaded;
690 s->wng->input_eof = &s->receiver_node->eof;
691 }
692 s->wng->task.event_handler = wng_event_handler;
693 for (i = 0; i < a->num_writers; i++) {
694 s->wng->writer_nodes[i].conf = a->writer_conf[i];
695 s->wng->writer_nodes[i].writer = a->writers[i];
696 sprintf(s->wng->writer_nodes[i].task.status, "writer_ node");
697 }
698 ret = wng_open(s->wng);
699 s->wstime = *now;
700 current_decoder = slot_num;
701 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
702 }
703
704 static void rn_event_handler(struct task *t)
705 {
706 // struct receiver_node *rn = t->private_data;
707 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
708 unregister_task(t);
709 }
710
711 static void open_receiver(int format)
712 {
713 struct audio_format_info *a = &afi[format];
714 struct slot_info *s;
715 int ret, slot_num;
716 struct receiver_node *rn;
717
718 slot_num = get_empty_slot();
719 if (slot_num < 0)
720 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
721 s = &slot[slot_num];
722 s->format = format;
723 s->rtime = *now;
724 s->wtime = s->rtime;
725 s->receiver_node = para_calloc(sizeof(struct receiver_node));
726 rn = s->receiver_node;
727 rn->receiver = a->receiver;
728 rn->conf = a->receiver_conf;
729 ret = a->receiver->open(s->receiver_node);
730 if (ret < 0) {
731 PARA_ERROR_LOG("failed to open receiver (%s)\n",
732 PARA_STRERROR(-ret));
733 free(s->receiver_node);
734 s->receiver_node = NULL;
735 return;
736 }
737 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
738 audio_formats[s->format], a->receiver->name, slot_num);
739 rn->task.private_data = s->receiver_node;
740 PARA_NOTICE_LOG("rn = %p\n", rn->task.private_data);
741 rn->task.pre_select = a->receiver->pre_select;
742 rn->task.post_select = a->receiver->post_select;
743 rn->task.event_handler = rn_event_handler;
744 rn->task.flags = 0;
745 sprintf(rn->task.status, "receiver node");
746 register_task(&rn->task);
747 }
748
749 static int is_frozen(int format)
750 {
751 struct audio_format_info *a = &afi[format];
752
753 return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
754 }
755
756 static void open_current_receiver(void)
757 {
758 int i;
759
760 if (!af_status)
761 return;
762 i = get_audio_format_num(af_status);
763 if (i < 0)
764 return;
765 if (decoder_running(i) || is_frozen(i))
766 return;
767 open_receiver(i);
768 }
769
770 static void compute_time_diff(const struct timeval *status_time)
771 {
772 struct timeval tmp, diff;
773 static int count;
774 int sign;
775 const struct timeval max_deviation = {0, 500 * 1000};
776 const int time_smooth = 5;
777
778 sign = tv_diff(status_time, now, &diff);
779 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
780 // sign, sa_time_diff_sign);
781 if (!count) {
782 sa_time_diff_sign = sign;
783 sa_time_diff = diff;
784 count++;
785 return;
786 }
787 if (count > 5) {
788 int s = tv_diff(&diff, &sa_time_diff, &tmp);
789 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
790 PARA_WARNING_LOG("time diff jump: %lims\n",
791 s * tv2ms(&tmp));
792 }
793 count++;
794 sa_time_diff_sign = tv_convex_combination(
795 sa_time_diff_sign * time_smooth, &sa_time_diff,
796 count > 10? sign : sign * time_smooth, &diff,
797 &tmp);
798 sa_time_diff = tmp;
799 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
800 sign > 0? "+" : "-",
801 tv2ms(&diff),
802 sa_time_diff_sign ? "+" : "-",
803 tv2ms(&sa_time_diff)
804 );
805 }
806
807 static void check_stat_line(char *line)
808 {
809 int itemnum;
810 size_t ilen = 0;
811 long unsigned sec, usec;
812 char *tmp;
813
814 // PARA_INFO_LOG("line: %s\n", line);
815 if (!line)
816 return;
817 itemnum = stat_line_valid(line);
818 if (itemnum < 0) {
819 PARA_WARNING_LOG("invalid status line: %s\n", line);
820 return;
821 }
822 tmp = make_message("%s\n", line);
823 stat_client_write(tmp, itemnum);
824 free(tmp);
825 free(stat_item_values[itemnum]);
826 stat_item_values[itemnum] = para_strdup(line);
827 ilen = strlen(status_item_list[itemnum]);
828 switch (itemnum) {
829 case SI_STATUS:
830 playing = strstr(line, "playing")? 1 : 0;
831 break;
832 case SI_FORMAT:
833 free(af_status);
834 af_status = para_strdup(line + ilen + 1);
835 break;
836 case SI_OFFSET:
837 offset_seconds = atoi(line + ilen + 1);
838 break;
839 case SI_LENGTH:
840 length_seconds = atoi(line + ilen + 1);
841 break;
842 case SI_STREAM_START:
843 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
844 server_stream_start.tv_sec = sec;
845 server_stream_start.tv_usec = usec;
846 }
847 break;
848 case SI_CURRENT_TIME:
849 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
850 struct timeval tv = {sec, usec};
851 compute_time_diff(&tv);
852 }
853 break;
854 }
855 }
856
857 static void handle_signal(int sig)
858 {
859 switch (sig) {
860 case SIGCHLD:
861 for (;;) {
862 pid_t pid = para_reap_child();
863 if (pid <= 0)
864 return;
865 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
866 }
867 case SIGINT:
868 case SIGTERM:
869 case SIGHUP:
870 PARA_EMERG_LOG("terminating on signal %d\n", sig);
871 clean_exit(EXIT_FAILURE, "caught deadly signal");
872 return;
873 }
874 }
875
876 static void check_timeouts(void)
877 {
878
879 int slot_num, timeout = conf.stream_timeout_arg;
880
881 FOR_EACH_SLOT(slot_num) {
882 struct slot_info *s = &slot[slot_num];
883 if (s->format < 0)
884 continue;
885 /* check read time */
886 if (s->receiver_node &&
887 now->tv_sec > s->rtime.tv_sec + timeout) {
888 PARA_INFO_LOG("%s stream (slot %d) not ready\n",
889 audio_formats[s->format], slot_num);
890 s->receiver_node->eof = 1;
891 }
892 }
893 }
894
895 static void close_decoder_if_idle(int slot_num)
896 {
897 struct slot_info *s = &slot[slot_num];
898
899 if (s->format < 0)
900 return;
901 if (!s->fc)
902 return;
903 if (s->wng)
904 return;
905 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
906 slot_num, s->fc);
907 close_filters(s->fc);
908 free(s->fc);
909 close_receiver(slot_num);
910 clear_slot(slot_num);
911 }
912
913 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
914 {
915 int i;
916
917 now = &s->now;
918 if (audiod_status != AUDIOD_ON)
919 kill_all_decoders();
920 else if (playing)
921 open_current_receiver();
922 check_timeouts();
923 FOR_EACH_SLOT(i) {
924 struct receiver_node *rn;
925
926 close_decoder_if_idle(i);
927 if (slot[i].format < 0)
928 continue;
929 rn = slot[i].receiver_node;
930 if (rn && rn->loaded && !slot[i].wng) {
931 open_filters(i);
932 open_writer(i);
933 }
934 }
935 }
936
937 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
938 {
939 int i;
940
941 now = &s->now;
942 FOR_EACH_SLOT(i) {
943 struct receiver_node *rn = slot[i].receiver_node;
944
945 if (rn && rn->loaded)
946 slot[i].rtime = *now;
947 }
948 }
949
950 static void init_audiod_task(struct audiod_task *at)
951 {
952 at->task.pre_select = audiod_pre_select;
953 at->task.post_select = audiod_post_select;
954 at->task.private_data = at;
955 at->task.flags = 0;
956 sprintf(at->task.status, "audiod task");
957 }
958
959 static int parse_stream_command(const char *txt, char **cmd)
960 {
961 char *p = strchr(txt, ':');
962 int i;
963
964 if (!p)
965 return -E_MISSING_COLON;
966 p++;
967 FOR_EACH_AUDIO_FORMAT(i) {
968 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
969 continue;
970 *cmd = p;
971 return i;
972 }
973 return -E_UNSUPPORTED_AUDIO_FORMAT;
974 }
975
976 static int add_filter(int format, char *cmdline)
977 {
978 struct audio_format_info *a = &afi[format];
979 int filter_num, nf = a->num_filters;
980
981 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
982 if (filter_num < 0)
983 return filter_num;
984 a->filters[nf] = &filters[filter_num];
985 a->num_filters++;
986 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
987 a->filters[nf]->name);
988 return filter_num;
989 }
990
991 static int setup_default_filters(void)
992 {
993 int i, ret = 1;
994
995 FOR_EACH_AUDIO_FORMAT(i) {
996 struct audio_format_info *a = &afi[i];
997 char *tmp;
998 int j;
999 if (a->num_filters)
1000 continue;
1001 /* add "dec" to audio format name */
1002 tmp = make_message("%sdec", audio_formats[i]);
1003 for (j = 0; filters[j].name; j++)
1004 if (!strcmp(tmp, filters[j].name))
1005 break;
1006 free(tmp);
1007 ret = -E_UNSUPPORTED_FILTER;
1008 if (!filters[j].name)
1009 goto out;
1010 tmp = para_strdup(filters[j].name);
1011 ret = add_filter(i, tmp);
1012 free(tmp);
1013 if (ret < 0)
1014 goto out;
1015 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1016 filters[j].name);
1017 ret = add_filter(i, "wav");
1018 if (ret < 0)
1019 goto out;
1020 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1021 }
1022 out:
1023 return ret;
1024 }
1025
1026 static int init_writers(void)
1027 {
1028 int i, ret, nw;
1029 char *cmd;
1030 struct audio_format_info *a;
1031
1032 init_supported_writers();
1033 nw = PARA_MAX(1, conf.writer_given);
1034 PARA_INFO_LOG("allocating space for %d writers\n", nw);
1035 FOR_EACH_AUDIO_FORMAT(i) {
1036 a = &afi[i];
1037 a->writer_conf = para_malloc(nw * sizeof(void *));
1038 a->writers = para_malloc(nw * sizeof(struct writer *));
1039 a->num_writers = 0;
1040 }
1041 for (i = 0; i < conf.writer_given; i++) {
1042 void *wconf;
1043 int writer_num;
1044 ret = parse_stream_command(conf.writer_arg[i], &cmd);
1045 if (ret < 0)
1046 goto out;
1047 a = &afi[ret];
1048 nw = a->num_writers;
1049 wconf = check_writer_arg(cmd, &writer_num);
1050 if (!wconf) {
1051 ret = writer_num;
1052 goto out;
1053 }
1054 a->writers[nw] = &writers[ret];
1055 a->writer_conf[nw] = wconf;
1056 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
1057 nw, writer_names[writer_num]);
1058 a->num_writers++;
1059 }
1060 ret = 1;
1061 out:
1062 return ret;
1063 }
1064
1065 static int init_receivers(void)
1066 {
1067 int i, ret, receiver_num;
1068 char *cmd = NULL;
1069 struct audio_format_info *a;
1070
1071 for (i = 0; receivers[i].name; i++) {
1072 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1073 receivers[i].init(&receivers[i]);
1074 }
1075 for (i = 0; i < conf.receiver_given; i++) {
1076 char *arg = conf.receiver_arg[i];
1077 char *recv = strchr(arg, ':');
1078 ret = -E_MISSING_COLON;
1079 if (!recv)
1080 goto out;
1081 *recv = '\0';
1082 recv++;
1083 ret = get_audio_format_num(arg);
1084 if (ret < 0)
1085 goto out;
1086 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1087 if (!afi[ret].receiver_conf) {
1088 ret = -E_RECV_SYNTAX;
1089 goto out;
1090 }
1091 afi[ret].receiver = &receivers[receiver_num];
1092 }
1093 /* use the first available receiver with no arguments
1094 * for those audio formats for which no receiver
1095 * was specified
1096 */
1097 cmd = para_strdup(receivers[0].name);
1098 FOR_EACH_AUDIO_FORMAT(i) {
1099 a = &afi[i];
1100 if (a->receiver_conf)
1101 continue;
1102 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1103 if (!a->receiver_conf)
1104 return -E_RECV_SYNTAX;
1105 a->receiver = &receivers[receiver_num];
1106 }
1107 ret = 1;
1108 out:
1109 free(cmd);
1110 return ret;
1111 }
1112
1113 static int init_filters(void)
1114 {
1115 int i, ret, nf;
1116
1117 filter_init(filters);
1118 nf = PARA_MAX(2, conf.filter_given) + 1;
1119 PARA_INFO_LOG("allocating space for %d filters\n", nf);
1120 FOR_EACH_AUDIO_FORMAT(i) {
1121 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1122 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1123 }
1124 if (!conf.no_default_filters_given)
1125 return setup_default_filters();
1126 for (i = 0; i < conf.filter_given; i++) {
1127 char *arg = conf.filter_arg[i];
1128 char *filter_name = strchr(arg, ':');
1129 ret = -E_MISSING_COLON;
1130 if (!filter_name)
1131 goto out;
1132 *filter_name = '\0';
1133 filter_name++;
1134 ret = get_audio_format_num(arg);
1135 if (ret < 0)
1136 goto out;
1137 ret = add_filter(ret, filter_name);
1138 if (ret < 0)
1139 goto out;
1140 }
1141 ret = 1;
1142 out:
1143 return ret;
1144 }
1145
1146 static int init_stream_io(void)
1147 {
1148 int ret;
1149
1150 ret = init_writers();
1151 if (ret < 0)
1152 return ret;
1153 ret = init_receivers();
1154 if (ret < 0)
1155 return ret;
1156 ret = init_filters();
1157 if (ret < 0)
1158 return ret;
1159 return 1;
1160 }
1161
1162 static int dump_commands(int fd)
1163 {
1164 char *buf = para_strdup(""), *tmp = NULL;
1165 int i;
1166 ssize_t ret;
1167
1168 FOR_EACH_COMMAND(i) {
1169 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1170 cmds[i].description);
1171 free(buf);
1172 buf = tmp;
1173 }
1174 ret = client_write(fd, buf);
1175 free(buf);
1176 return ret;
1177 }
1178
1179 /*
1180 * command handlers don't close their fd on errors (ret < 0) so that
1181 * its caller can send an error message. Otherwise (ret >= 0) it's up
1182 * to each individual command to close the fd if necessary.
1183 */
1184
1185 static int com_help(int fd, int argc, char **argv)
1186 {
1187 int i, ret;
1188 char *buf;
1189 const char *dflt = "No such command. Available commands:\n";
1190
1191 if (argc < 2) {
1192 ret = dump_commands(fd);
1193 goto out;
1194 }
1195 FOR_EACH_COMMAND(i) {
1196 if (strcmp(cmds[i].name, argv[1]))
1197 continue;
1198 buf = make_message(
1199 "NAME\n\t%s -- %s\n"
1200 "SYNOPSIS\n\tpara_audioc %s\n"
1201 "DESCRIPTION\n%s\n",
1202 argv[1],
1203 cmds[i].description,
1204 cmds[i].synopsis,
1205 cmds[i].help
1206 );
1207 ret = client_write(fd, buf);
1208 free(buf);
1209 goto out;
1210 }
1211 ret = client_write(fd, dflt);
1212 if (ret > 0)
1213 ret = dump_commands(fd);
1214 out:
1215 if (ret >= 0)
1216 close(fd);
1217 return ret;
1218 }
1219
1220 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1221 {
1222 int i, ret;
1223 char *buf = NULL;
1224 long unsigned mask = ~0LU;
1225
1226 if (argc > 1) {
1227 mask = 0;
1228 for (i = 1; i < argc; i++) {
1229 ret = stat_item_valid(argv[i]);
1230 if (ret < 0)
1231 return ret;
1232 mask |= (1 << ret);
1233 }
1234 }
1235 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1236 if (mask & (1 << SI_PLAY_TIME)) {
1237 struct timeval *t = wstime();
1238 char *ts = get_time_string(t);
1239 if (ts) {
1240 ret = client_write(fd, ts);
1241 if (ret < 0)
1242 goto out;
1243 free(ts);
1244 }
1245 }
1246 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1247 char *tmp, *us = uptime_str();
1248 tmp = make_message("%s:%s\n",
1249 status_item_list[SI_AUDIOD_UPTIME], us);
1250 free(us);
1251 ret = client_write(fd, tmp);
1252 if (ret < 0)
1253 goto out;
1254 free(tmp);
1255 }
1256 if (mask & (1 << SI_AUDIOD_STATUS)) {
1257 char *s = audiod_status_string();
1258 ret = client_write(fd, s);
1259 if (ret < 0)
1260 goto out;
1261 free(s);
1262 }
1263 if (mask & (1 << SI_DECODER_FLAGS)) {
1264 char *df =decoder_flags();
1265 ret = client_write(fd, df);
1266 if (ret < 0)
1267 goto out;
1268 free(df);
1269 }
1270
1271 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1272 char *tmp, *v;
1273 if (!((1 << i) & mask))
1274 continue;
1275 v = stat_item_values[i];
1276 tmp = make_message("%s%s%s", buf? buf: "",
1277 v? v : "", v? "\n" : "");
1278 free(buf);
1279 buf = tmp;
1280 }
1281 ret = client_write(fd, buf);
1282 out:
1283 if (ret > 0)
1284 ret = stat_client_add(fd, mask);
1285 free(buf);
1286 return ret;
1287 }
1288
1289 static int com_grab(int fd, char *cmdline)
1290 {
1291 struct grab_client *gc;
1292 struct filter_node *fn;
1293 int i, err;
1294 char *msg;
1295
1296 gc = grab_client_new(fd, cmdline, &err);
1297 if (!gc)
1298 goto err_out;
1299 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1300 if (fn)
1301 activate_grab_client(gc, fn);
1302 return 1;
1303 err_out:
1304 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1305 return err;
1306 if (err == -E_GC_HELP_GIVEN) {
1307 msg = make_message("%s\n\n", grab_client_args_info_usage);
1308 for (i = 0; grab_client_args_info_help[i]; i++) {
1309 char *tmp = make_message("%s%s\n", msg,
1310 grab_client_args_info_help[i]);
1311 free(msg);
1312 msg = tmp;
1313 }
1314 } else
1315 msg = make_message("%s %s\n",
1316 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1317 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1318 err = client_write(fd, msg);
1319 free(msg);
1320 if (err < 0)
1321 return err;
1322 close(fd);
1323 return 1;
1324 }
1325
1326 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1327 {
1328 close(fd);
1329 clean_exit(EXIT_SUCCESS, "terminating on user request");
1330 }
1331
1332 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1333 {
1334 audiod_status = AUDIOD_ON;
1335 close(fd);
1336 return 1;
1337 }
1338
1339 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1340 {
1341 audiod_status = AUDIOD_OFF;
1342 close(fd);
1343 return 1;
1344 }
1345
1346 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1347 {
1348 audiod_status = AUDIOD_STANDBY;
1349 close(fd);
1350 return 1;
1351 }
1352
1353 static int com_cycle(int fd, int argc, char **argv)
1354 {
1355 switch (audiod_status) {
1356 case AUDIOD_ON:
1357 return com_sb(fd, argc, argv);
1358 break;
1359 case AUDIOD_OFF:
1360 return com_on(fd, argc, argv);
1361 break;
1362 case AUDIOD_STANDBY:
1363 return com_off(fd, argc, argv);
1364 break;
1365 }
1366 close(fd);
1367 return 1;
1368 }
1369
1370 static int check_perms(uid_t uid)
1371 {
1372 int i;
1373
1374 if (!conf.user_allow_given)
1375 return 1;
1376 for (i = 0; i < conf.user_allow_given; i++)
1377 if (uid == conf.user_allow_arg[i])
1378 return 1;
1379 return -E_UCRED_PERM;
1380 }
1381
1382 static int handle_connect(void)
1383 {
1384 int i, argc, ret, clifd = -1;
1385 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1386 struct sockaddr_un unix_addr;
1387
1388 ret = para_accept(cmd_task->fd, &unix_addr, sizeof(struct sockaddr_un));
1389 if (ret < 0)
1390 goto out;
1391 clifd = ret;
1392 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1393 if (ret < 0)
1394 goto out;
1395 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1396 ret = check_perms(ret);
1397 if (ret < 0)
1398 goto out;
1399 ret = -E_INVALID_AUDIOD_CMD;
1400 cmd = para_strdup(buf);
1401 p = strchr(cmd, '\n');
1402 if (!p)
1403 p = "";
1404 else {
1405 *p = '\0';
1406 p++;
1407 }
1408 for (i = 0; cmds[i].name; i++) {
1409 int j;
1410 if (strcmp(cmds[i].name, cmd))
1411 continue;
1412 if (cmds[i].handler) {
1413 argc = split_args(buf, &argv, "\n");
1414 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1415 ret = cmds[i].handler(clifd, argc, argv);
1416 goto out;
1417 }
1418 for (j = 0; p[j]; j++)
1419 if (p[j] == '\n')
1420 p[j] = ' ';
1421 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1422 ret = cmds[i].line_handler(clifd, p);
1423 goto out;
1424 }
1425 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1426 out:
1427 free(cmd);
1428 free(buf);
1429 free(argv);
1430 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1431 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1432 client_write(clifd, tmp);
1433 free(tmp);
1434 close(clifd);
1435 }
1436 return ret;
1437 }
1438
1439 static void audiod_get_socket(void)
1440 {
1441 struct sockaddr_un unix_addr;
1442
1443 if (conf.socket_given)
1444 socket_name = para_strdup(conf.socket_arg);
1445 else {
1446 char *hn = para_hostname();
1447 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1448 hn);
1449 free(hn);
1450 }
1451 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1452 if (conf.force_given)
1453 unlink(socket_name);
1454 cmd_task->fd = create_pf_socket(socket_name, &unix_addr,
1455 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1456 if (cmd_task->fd < 0) {
1457 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1458 exit(EXIT_FAILURE); /* do not unlink socket */
1459 }
1460 if (listen(cmd_task->fd , 5) < 0) {
1461 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1462 exit(EXIT_FAILURE); /* do not unlink socket */
1463 }
1464 add_close_on_fork_list(cmd_task->fd);
1465 }
1466
1467 static int open_stat_pipe(void)
1468 {
1469 int ret, fd[3] = {-1, 1, 0};
1470 pid_t pid;
1471 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1472 if (ret >= 0) {
1473 ret = fd[1];
1474 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1475 add_close_on_fork_list(ret);
1476 } else
1477 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1478 return ret;
1479 }
1480
1481 void signal_event_handler(struct task *t)
1482 {
1483 struct signal_task *st = t->private_data;
1484 handle_signal(st->signum);
1485 }
1486
1487 void signal_pre_select(struct sched *s, struct task *t)
1488 {
1489 struct signal_task *st = t->private_data;
1490 t->ret = 1;
1491 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1492 }
1493
1494 void signal_post_select(struct sched *s, struct task *t)
1495 {
1496 struct signal_task *st = t->private_data;
1497 t->ret = 1;
1498 if (!FD_ISSET(st->fd, &s->rfds))
1499 return;
1500 t->ret = -E_SIGNAL_CAUGHT;
1501 st->signum = para_next_signal();
1502 }
1503
1504 void signal_setup_default(struct signal_task *st)
1505 {
1506 st->task.pre_select = signal_pre_select;
1507 st->task.post_select = signal_post_select;
1508 st->task.private_data = st;
1509 st->task.flags = 0;
1510 sprintf(st->task.status, "signal task");
1511 }
1512
1513 static void command_pre_select(struct sched *s, struct task *t)
1514 {
1515 struct command_task *ct = t->private_data;
1516 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1517
1518 }
1519
1520 static void command_post_select(struct sched *s, struct task *t)
1521 {
1522 int ret;
1523 struct command_task *ct = t->private_data;
1524
1525 if (audiod_status != AUDIOD_OFF)
1526 audiod_status_dump();
1527 t->ret = 1; /* always successful */
1528 if (!FD_ISSET(ct->fd, &s->rfds))
1529 return;
1530 ret = handle_connect();
1531 if (ret < 0)
1532 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1533 }
1534
1535 static void init_command_task(struct command_task *ct)
1536 {
1537 ct->task.pre_select = command_pre_select;
1538 ct->task.post_select = command_post_select;
1539 ct->task.private_data = ct;
1540 ct->task.flags = 0;
1541 sprintf(ct->task.status, "command task");
1542 }
1543
1544 static void status_pre_select(struct sched *s, struct task *t)
1545 {
1546 struct status_task *st = t->private_data;
1547 t->ret = 1;
1548 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1549 close_stat_pipe();
1550 if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
1551 st->fd = open_stat_pipe();
1552 st->loaded = 0;
1553 st->buf[0] = '\0';
1554 }
1555 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1556 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1557 }
1558
1559 static void status_post_select(struct sched *s, struct task *t)
1560 {
1561 struct status_task *st = t->private_data;
1562 int ret;
1563
1564 t->ret = 1;
1565 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1566 return;
1567 ret = read(st->fd, st->buf + st->loaded,
1568 STRINGSIZE - 1 - st->loaded);
1569 if (ret <= 0) {
1570 close_stat_pipe();
1571 /* avoid busy loop if server is down */
1572 while (sleep(1) > 0)
1573 ; /* try again*/
1574 } else {
1575 st->buf[ret + st->loaded] = '\0';
1576 st->loaded = for_each_line(st->buf, ret + st->loaded,
1577 &check_stat_line);
1578 }
1579 }
1580
1581 static void init_status_task(struct status_task *st)
1582 {
1583 st->task.pre_select = status_pre_select;
1584 st->task.post_select = status_post_select;
1585 st->task.private_data = st;
1586 st->task.flags = 0;
1587 st->loaded = 0;
1588 st->fd = -1;
1589 st->buf[0] = '\0';
1590 sprintf(st->task.status, "status task");
1591 }
1592
1593 static void set_initial_status(void)
1594 {
1595 audiod_status = AUDIOD_ON;
1596 if (!conf.mode_given)
1597 return;
1598 if (!strcmp(conf.mode_arg, "sb")) {
1599 audiod_status = AUDIOD_STANDBY;
1600 return;
1601 }
1602 if (!strcmp(conf.mode_arg, "off")) {
1603 audiod_status = AUDIOD_OFF;
1604 return;
1605 }
1606 if (strcmp(conf.mode_arg, "on"))
1607 PARA_WARNING_LOG("%s", "invalid mode\n");
1608 }
1609
1610 int main(int argc, char *argv[])
1611 {
1612 char *cf;
1613 int ret, i;
1614 struct sched s;
1615
1616 init_sched();
1617
1618 valid_fd_012();
1619 hostname = para_hostname();
1620 cmdline_parser(argc, argv, &conf);
1621 para_drop_privileges(conf.user_arg, conf.group_arg);
1622 cf = configfile_exists();
1623 if (cf) {
1624 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1625 PARA_EMERG_LOG("%s", "parse error in config file\n");
1626 exit(EXIT_FAILURE);
1627 }
1628 }
1629 if (conf.logfile_given)
1630 logfile = open_log(conf.logfile_arg);
1631 log_welcome("para_audiod", conf.loglevel_arg);
1632 i = init_stream_io();
1633 if (i < 0) {
1634 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1635 exit(EXIT_FAILURE);
1636 }
1637 server_uptime(UPTIME_SET);
1638 set_initial_status();
1639 FOR_EACH_SLOT(i)
1640 clear_slot(i);
1641 init_grabbing();
1642 setup_signal_handling();
1643 if (conf.daemon_given)
1644 daemon_init();
1645 audiod_get_socket(); /* doesn't return on errors */
1646
1647 signal_setup_default(sig_task);
1648 sig_task->task.event_handler = signal_event_handler;
1649
1650 init_status_task(stat_task);
1651 init_command_task(cmd_task);
1652 init_audiod_task(at);
1653
1654 register_task(&sig_task->task);
1655 register_task(&cmd_task->task);
1656 register_task(&stat_task->task);
1657 register_task(&at->task);
1658 s.default_timeout.tv_sec = 0;
1659 s.default_timeout.tv_usec = 99 * 1000;
1660 ret = sched(&s);
1661
1662 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1663 return EXIT_FAILURE;
1664 }