audiod: avoid another gettimeofday() call
[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 <sys/time.h> /* gettimeofday */
22 #include "para.h"
23
24 #include "audiod.cmdline.h"
25 #include "list.h"
26 #include "close_on_fork.h"
27 #include "sched.h"
28 #include "recv.h"
29 #include "filter.h"
30 #include "grab_client.cmdline.h"
31 #include "grab_client.h"
32
33 #include "error.h"
34 #include "audiod.h"
35 #include "net.h"
36 #include "daemon.h"
37 #include "string.h"
38 #include "fd.h"
39 #include "write.h"
40 #include "write_common.h"
41
42 /** define the array of error lists needed by para_audiod */
43 INIT_AUDIOD_ERRLISTS;
44 /** define the array containing all supported audio formats */
45 DEFINE_AUDIO_FORMAT_ARRAY;
46
47 /**
48 * the possible modes of operation
49 *
50 * - off: disconnect from para_server
51 * - on: receive status information from para_server and play the audio stream
52 * - sb: only receive status information but not the audio stream
53 */
54 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
55
56 /** defines how to handle one supported audio format */
57 struct audio_format_info {
58 /** pointer to the receiver for this audio format */
59 struct receiver *receiver;
60 /** the receiver configuration */
61 void *receiver_conf;
62 /** the number of filters that should be activated for this audio format */
63 unsigned int num_filters;
64 /** pointer to the array of filters to be activated */
65 struct filter **filters;
66 /** pointer to the array of filter configurations */
67 void **filter_conf;
68 /** the number of filters that should be activated for this audio format */
69 unsigned int num_writers;
70 /** pointer to the array of writers to be activated */
71 struct writer **writers;
72 /** pointer to the array of writer configurations */
73 void **writer_conf;
74 /** do not start receiver/filters/writer before this time */
75 struct timeval restart_barrier;
76 };
77
78 /**
79 * describes one instance of a receiver-filter-writer chain
80 *
81 * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
82 * writer_node, writer_node_group.
83 */
84 struct slot_info {
85 /** number of the audio format in this slot */
86 int format;
87 /** time of the last successful read from the receiver */
88 struct timeval rtime;
89 /** time the last write to the write fd happend */
90 struct timeval wtime;
91 /** writer start time */
92 struct timeval wstime;
93 /** the receiver info associated with this slot */
94 struct receiver_node *receiver_node;
95 /** the active filter chain */
96 struct filter_chain *fc;
97 /** the active writer node group */
98 struct writer_node_group *wng;
99 };
100 static struct slot_info slot[MAX_STREAM_SLOTS];
101
102 extern const char *status_item_list[NUM_STAT_ITEMS];
103
104 static struct gengetopt_args_info conf;
105 static struct timeval server_stream_start, sa_time_diff;
106 static int playing, current_decoder = -1,
107 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
108 sa_time_diff_sign = 1;
109 static char *af_status, /* the audio format announced in server status */
110 *socket_name, *hostname;
111 static char *stat_item_values[NUM_STAT_ITEMS];
112 static FILE *logfile;
113 static const struct timeval restart_delay = {0, 300 * 1000};
114
115 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
116
117 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
118
119 struct command_task {
120 int fd;
121 struct task task;
122 };
123 static struct command_task command_task_struct, *cmd_task = &command_task_struct;
124
125 struct status_task {
126 int fd;
127 struct task task;
128 char buf[STRINGSIZE];
129 unsigned loaded;
130 };
131 static struct status_task status_task_struct, *stat_task = &status_task_struct;
132
133 struct audiod_task {
134 struct task task;
135 };
136 static struct audiod_task audiod_task_struct, *at = &audiod_task_struct;
137
138 struct signal_task {
139 int fd;
140 int signum;
141 struct task task;
142 };
143
144
145 /** defines one command of para_audiod */
146 struct audiod_command {
147 /** the name of the command */
148 const char *name;
149 /** pointer to the function that handles the command */
150 int (*handler)(int, int, char**);
151 int (*line_handler)(int, char*);
152 /** one-line description of the command */
153 const char *description;
154 /** summary of the command line options */
155 const char *synopsis;
156 /** the long help text */
157 const char *help;
158 };
159 static int com_grab(int, char *);
160 static int com_cycle(int, int, char **);
161 static int com_help(int, int, char **);
162 static int com_off(int, int, char **);
163 static int com_on(int, int, char **);
164 static int com_sb(int, int, char **);
165 static int com_stat(int, int, char **);
166 static int com_term(int, int, char **);
167 static struct audiod_command cmds[] = {
168 {
169 .name = "cycle",
170 .handler = com_cycle,
171 .description = "switch to next mode",
172 .synopsis = "cycle",
173 .help =
174
175 "on -> standby -> off -> on\n"
176
177 },
178 {
179 .name = "grab",
180 .line_handler = com_grab,
181 .description = "grab the audio stream",
182 .synopsis = "-- grab [grab_options]",
183 .help =
184
185 "grab ('splice') the audio stream at any position in the filter \n"
186 "chain and send that data back to the client. Try\n"
187 "\t para_audioc -- grab -h\n"
188 "for the list of available options.\n"
189 },
190
191 {
192 .name = "help",
193 .handler = com_help,
194 .description = "display command list or help for given command",
195 .synopsis = "help [command]",
196 .help =
197
198 "When I was younger, so much younger than today, I never needed\n"
199 "anybody's help in any way. But now these days are gone, I'm not so\n"
200 "self assured. Now I find I've changed my mind and opened up the doors.\n"
201 "\n"
202 " -- Beatles: Help\n"
203
204 },
205 {
206 .name = "off",
207 .handler = com_off,
208 .description = "deactivate para_audiod",
209 .synopsis = "off",
210 .help =
211
212 "Close connection to para_server and stop all decoders.\n"
213
214 },
215 {
216 .name = "on",
217 .handler = com_on,
218 .description = "activate para_audiod",
219 .synopsis = "on",
220 .help =
221
222 "Establish connection to para_server, retrieve para_server's current\n"
223 "status. If playing, start corresponding decoder. Otherwise stop\n"
224 "all decoders.\n"
225
226 },
227 {
228 .name = "sb",
229 .handler = com_sb,
230 .description = "enter standby mode",
231 .synopsis = "sb",
232 .help =
233
234 "Stop all decoders but leave connection to para_server open.\n"
235
236 },
237 {
238 .name = "stat",
239 .handler = com_stat,
240 .description = "print status information",
241 .synopsis = "stat [item1 ...]",
242 .help =
243
244 "Dump given status items (all if none given) to stdout.\n"
245
246 },
247 {
248 .name = "term",
249 .handler = com_term,
250 .description = "terminate audiod",
251 .synopsis = "term",
252 .help =
253
254 "Stop all decoders, shut down connection to para_server and exit.\n"
255
256 },
257 {
258 .name = NULL,
259 }
260 };
261
262 /** iterate over all slots */
263 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
264 /** iterate over all supported audio formats */
265 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
266 /** iterate over the array of all audiod commands */
267 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
268
269 /**
270 * get the audio format number
271 * \param name the name of the audio format
272 *
273 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
274 * \a name is not a supported audio format.
275 */
276 int get_audio_format_num(char *name)
277 {
278 int i;
279 FOR_EACH_AUDIO_FORMAT(i)
280 if (!strcmp(name, audio_formats[i]))
281 return i;
282 return -E_UNSUPPORTED_AUDIO_FORMAT;
283 }
284
285 /*
286 * log function. first argument is loglevel.
287 */
288 void para_log(int ll, const char* fmt,...)
289 {
290 va_list argp;
291 FILE *outfd;
292 struct tm *tm;
293 time_t t1;
294 char str[MAXLINE] = "";
295
296 if (ll < conf.loglevel_arg)
297 return;
298 outfd = logfile? logfile : stderr;
299 time(&t1);
300 tm = localtime(&t1);
301 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
302 fprintf(outfd, "%s %s ", str, hostname);
303 if (conf.loglevel_arg <= INFO)
304 fprintf(outfd, "%i ", ll);
305 va_start(argp, fmt);
306 vfprintf(outfd, fmt, argp);
307 va_end(argp);
308 }
309
310 static int client_write(int fd, const char *buf)
311 {
312 size_t len = strlen(buf);
313 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
314 }
315
316 static char *get_time_string(struct timeval *newest_stime)
317 {
318 struct timeval now, diff, adj_stream_start, tmp;
319 int total = 0, use_server_time = 1;
320
321 if (!playing) {
322 if (length_seconds)
323 return NULL;
324 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
325 }
326 if (audiod_status == AUDIOD_OFF)
327 goto out;
328 if (sa_time_diff_sign > 0)
329 tv_diff(&server_stream_start, &sa_time_diff,
330 &adj_stream_start);
331 else
332 tv_add(&server_stream_start, &sa_time_diff,
333 &adj_stream_start);
334 tmp = adj_stream_start;
335 if (newest_stime && audiod_status == AUDIOD_ON) {
336 tv_diff(newest_stime, &adj_stream_start, &diff);
337 if (tv2ms(&diff) < 5000) {
338 tmp = *newest_stime;
339 use_server_time = 0;
340 }
341 }
342 gettimeofday(&now, NULL);
343 tv_diff(&now, &tmp, &diff);
344 total = diff.tv_sec + offset_seconds;
345 if (total > length_seconds)
346 total = length_seconds;
347 if (total < 0)
348 total = 0;
349 out:
350 return make_message(
351 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
352 status_item_list[SI_PLAY_TIME],
353 use_server_time? "~" : "",
354 total / 60,
355 total % 60,
356 (length_seconds - total) / 60,
357 (length_seconds - total) % 60,
358 length_seconds? (total * 100 + length_seconds / 2) /
359 length_seconds : 0,
360 length_seconds / 60,
361 length_seconds % 60
362 );
363 }
364
365 __malloc static char *audiod_status_string(void)
366 {
367 const char *status = (audiod_status == AUDIOD_ON)?
368 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
369 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
370 }
371
372 static struct timeval *wstime(void)
373 {
374 int i;
375 struct timeval *max = NULL;
376 FOR_EACH_SLOT(i) {
377 struct slot_info *s = &slot[i];
378 if (!s->wng)
379 continue;
380 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
381 continue;
382 max = &s->wstime;
383 }
384 return max;
385 }
386 __malloc static char *decoder_flags(void)
387 {
388 int i;
389 char decoder_flags[MAX_STREAM_SLOTS + 1];
390
391 FOR_EACH_SLOT(i) {
392 struct slot_info *s = &slot[i];
393 char flag = '0';
394 if (s->receiver_node)
395 flag += 1;
396 if (s->wng)
397 flag += 2;
398 decoder_flags[i] = flag;
399 }
400 decoder_flags[MAX_STREAM_SLOTS] = '\0';
401 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
402 decoder_flags);
403 }
404
405 static char *configfile_exists(void)
406 {
407 static char *config_file;
408
409 if (!config_file) {
410 char *home = para_homedir();
411 config_file = make_message("%s/.paraslash/audiod.conf", home);
412 free(home);
413 }
414 return file_exists(config_file)? config_file : NULL;
415 }
416
417 static void setup_signal_handling(void)
418 {
419 sig_task->fd = para_signal_init();
420 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
421 para_install_sighandler(SIGINT);
422 para_install_sighandler(SIGTERM);
423 para_install_sighandler(SIGCHLD);
424 para_install_sighandler(SIGHUP);
425 signal(SIGPIPE, SIG_IGN);
426 }
427
428 static void audiod_status_dump(void)
429 {
430 static char *p_ts, *p_us, *p_as, *p_df;
431 struct timeval *t = wstime();
432 char *us, *tmp = get_time_string(t);
433
434 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
435 stat_client_write(tmp, SI_PLAY_TIME);
436 free(p_ts);
437 p_ts = tmp;
438
439 us = uptime_str();
440 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
441 free(us);
442 if (!p_us || strcmp(p_us, tmp))
443 stat_client_write(tmp, SI_AUDIOD_UPTIME);
444 free(p_us);
445 p_us = tmp;
446
447 tmp = audiod_status_string();
448 if (!p_as || strcmp(p_as, tmp))
449 stat_client_write(tmp, SI_AUDIOD_STATUS);
450 free(p_as);
451 p_as = tmp;
452
453 tmp = decoder_flags();
454 if (!p_df || strcmp(p_df, tmp))
455 stat_client_write(tmp, SI_DECODER_FLAGS);
456 free(p_df);
457 p_df = tmp;
458 }
459
460 static void clear_slot(int slot_num)
461 {
462 struct slot_info *s = &slot[slot_num];
463
464 PARA_INFO_LOG("clearing slot %d\n", slot_num);
465 memset(s, 0, sizeof(struct slot_info));
466 s->format = -1;
467 }
468
469 static void set_restart_barrier(int format, struct timeval *now)
470 {
471 struct timeval tmp;
472
473 if (now)
474 tmp = *now;
475 else
476 gettimeofday(&tmp, NULL);
477 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
478 }
479
480 static void close_receiver(int slot_num)
481 {
482 struct slot_info *s = &slot[slot_num];
483 struct audio_format_info *a;
484
485 if (s->format < 0 || !s->receiver_node)
486 return;
487 a = &afi[s->format];
488 PARA_NOTICE_LOG("closing %s recevier in slot %d (eof = %d)\n",
489 audio_formats[s->format] , slot_num, s->receiver_node->eof);
490 if (!s->receiver_node->eof)
491 unregister_task(&s->receiver_node->task);
492 a->receiver->close(s->receiver_node);
493 free(s->receiver_node);
494 s->receiver_node = NULL;
495 set_restart_barrier(s->format, NULL);
496 }
497
498 static void kill_all_decoders(void)
499 {
500 int i;
501
502 FOR_EACH_SLOT(i) {
503 struct slot_info *s = &slot[i];
504 if (s->receiver_node)
505 s->receiver_node->eof = 1;
506 }
507 }
508
509 static void check_sigchld(void)
510 {
511 pid_t pid;
512 struct timeval now;
513 gettimeofday(&now, NULL);
514
515 reap_next_child:
516 pid = para_reap_child();
517 if (pid <= 0)
518 return;
519 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
520 goto reap_next_child;
521 }
522
523 static int get_empty_slot(void)
524 {
525 int i;
526 struct slot_info *s;
527
528 FOR_EACH_SLOT(i) {
529 s = &slot[i];
530 if (s->format < 0) {
531 clear_slot(i);
532 return i;
533 }
534 if (s->wng)
535 continue;
536 if (s->receiver_node)
537 continue;
538 if (s->fc)
539 continue;
540 clear_slot(i);
541 return i;
542 }
543 return -E_NO_MORE_SLOTS;
544 }
545
546 static int decoder_running(int format)
547 {
548 int i, ret = 0;
549 struct slot_info *s;
550
551 FOR_EACH_SLOT(i) {
552 s = &slot[i];
553 if (s->format == format && s->receiver_node)
554 ret |= 1;
555 if (s->format == format && s->wng)
556 ret |= 2;
557 }
558 return ret;
559 }
560
561 static void close_stat_pipe(void)
562 {
563 int i;
564
565 if (stat_task->fd < 0)
566 return;
567 PARA_NOTICE_LOG("%s", "closing status pipe\n");
568 close(stat_task->fd);
569 del_close_on_fork_list(stat_task->fd);
570 stat_task->fd = -1;
571 kill_all_decoders();
572 for (i = 0; i < NUM_STAT_ITEMS; i++) {
573 free(stat_item_values[i]);
574 stat_item_values[i] = NULL;
575 }
576 dump_empty_status();
577 length_seconds = 0;
578 offset_seconds = 0;
579 audiod_status_dump();
580 playing = 0;
581 stat_item_values[SI_STATUS_BAR] = make_message("%s:no connection to para_server\n",
582 status_item_list[SI_STATUS_BAR]);
583 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
584 }
585
586 static void __noreturn clean_exit(int status, const char *msg)
587 {
588 PARA_EMERG_LOG("%s\n", msg);
589 kill_all_decoders();
590 if (socket_name)
591 unlink(socket_name);
592 if (stat_task->fd >= 0)
593 close_stat_pipe();
594 exit(status);
595 }
596
597 /** get the number of filters for the given audio format */
598 int num_filters(int audio_format_num)
599 {
600 return afi[audio_format_num].num_filters;
601 }
602
603 void filter_event_handler(struct task *t)
604 {
605 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
606 unregister_task(t);
607 }
608
609 static void open_filters(int slot_num)
610 {
611 struct slot_info *s = &slot[slot_num];
612 struct audio_format_info *a = &afi[s->format];
613 int nf = a->num_filters;
614 int i;
615
616 s->fc = NULL;
617 if (!nf)
618 return;
619 s->fc = para_calloc(sizeof(struct filter_chain));
620 INIT_LIST_HEAD(&s->fc->filters);
621 s->fc->inbuf = s->receiver_node->buf;
622 s->fc->in_loaded = &s->receiver_node->loaded;
623 s->fc->input_eof = &s->receiver_node->eof;
624
625 s->fc->task.pre_select = filter_pre_select;
626 s->fc->task.event_handler = filter_event_handler;
627 s->fc->task.private_data = s->fc;
628 s->fc->task.flags = 0;
629 s->fc->eof = 0;
630 sprintf(s->fc->task.status, "filter chain");
631 for (i = 0; i < nf; i++) {
632 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
633 fn->conf = a->filter_conf[i];
634 fn->fc = s->fc;
635 fn->filter = a->filters[i];
636 INIT_LIST_HEAD(&fn->callbacks);
637 list_add_tail(&fn->node, &s->fc->filters);
638 fn->filter->open(fn);
639 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
640 audio_formats[s->format], i + 1, nf,
641 fn->filter->name, slot_num);
642 s->fc->outbuf = fn->buf;
643 s->fc->out_loaded = &fn->loaded;
644 }
645 register_task(&s->fc->task);
646 // PARA_DEBUG_LOG("output loaded for filter chain %p: %p\n", s->fc,
647 // s->fc->out_loaded);
648 }
649
650 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
651 {
652 struct filter_node *fn;
653 int i, j;
654
655 FOR_EACH_SLOT(i) {
656 struct slot_info *s = &slot[i];
657 if (s->format < 0 || !s->fc)
658 continue;
659 if (slot_num >= 0 && slot_num != i)
660 continue;
661 if (format >= 0 && s->format != format)
662 continue;
663 if (num_filters(i) < filternum)
664 continue;
665 /* success */
666 j = 1;
667 list_for_each_entry(fn, &s->fc->filters, node)
668 if (filternum <= 0 || j++ == filternum)
669 break;
670 return fn;
671 }
672 return NULL;
673 }
674
675 static void wng_event_handler(struct task *t)
676 {
677 struct writer_node_group *g = t->private_data;
678 int i;
679
680 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
681 unregister_task(t);
682 FOR_EACH_SLOT(i) {
683 if (slot[i].wng != g)
684 continue;
685 wng_close(g);
686 wng_destroy(g);
687 slot[i].wng = NULL;
688 }
689 }
690
691 static void start_stream_writer(int slot_num, struct timeval *now)
692 {
693 int ret, i;
694 struct slot_info *s = &slot[slot_num];
695 struct audio_format_info *a = &afi[s->format];
696
697 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
698 open_filters(slot_num);
699 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
700 if (!a->num_writers)
701 s->wng = setup_default_wng();
702 else
703 s->wng = wng_new(a->num_writers);
704 if (s->fc) {
705 s->wng->buf = s->fc->outbuf;
706 s->wng->loaded = s->fc->out_loaded;
707 s->wng->input_eof = &s->fc->eof;
708 s->fc->output_eof = &s->wng->eof;
709 } else {
710 s->wng->buf = s->receiver_node->buf;
711 s->wng->loaded = &s->receiver_node->loaded;
712 s->wng->input_eof = &s->receiver_node->eof;
713 }
714 s->wng->task.event_handler = wng_event_handler;
715 for (i = 0; i < a->num_writers; i++) {
716 s->wng->writer_nodes[i].conf = a->writer_conf[i];
717 s->wng->writer_nodes[i].writer = a->writers[i];
718 sprintf(s->wng->writer_nodes[i].task.status, "writer_ node");
719 }
720 ret = wng_open(s->wng);
721 s->wstime = *now;
722 current_decoder = slot_num;
723 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
724 }
725
726 void rn_event_handler(struct task *t)
727 {
728 // struct receiver_node *rn = t->private_data;
729 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
730 unregister_task(t);
731 }
732 static void open_receiver(int format)
733 {
734 struct audio_format_info *a = &afi[format];
735 struct slot_info *s;
736 int ret, slot_num;
737 struct receiver_node *rn;
738
739 slot_num = get_empty_slot();
740 if (slot_num < 0)
741 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
742 s = &slot[slot_num];
743 s->format = format;
744 gettimeofday(&s->rtime, NULL);
745 s->wtime = s->rtime;
746 s->receiver_node = para_calloc(sizeof(struct receiver_node));
747 rn = s->receiver_node;
748 rn->receiver = a->receiver;
749 rn->conf = a->receiver_conf;
750 ret = a->receiver->open(s->receiver_node);
751 if (ret < 0) {
752 PARA_ERROR_LOG("failed to open receiver (%s)\n",
753 PARA_STRERROR(-ret));
754 free(s->receiver_node);
755 s->receiver_node = NULL;
756 return;
757 }
758 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
759 audio_formats[s->format], a->receiver->name, slot_num);
760 rn->task.private_data = s->receiver_node;
761 PARA_NOTICE_LOG("rn = %p\n", rn->task.private_data);
762 rn->task.pre_select = a->receiver->pre_select;
763 rn->task.post_select = a->receiver->post_select;
764 rn->task.event_handler = rn_event_handler;
765 rn->task.flags = 0;
766 sprintf(rn->task.status, "receiver node");
767 register_task(&rn->task);
768 }
769
770 static int is_frozen(int format, struct timeval *now)
771 {
772 struct audio_format_info *a = &afi[format];
773
774 return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
775 }
776
777 static void start_current_receiver(struct timeval *now)
778 {
779 int i;
780
781 if (!af_status)
782 return;
783 i = get_audio_format_num(af_status);
784 if (i < 0)
785 return;
786 if ((decoder_running(i) & 1) || is_frozen(i, now))
787 return;
788 open_receiver(i);
789 }
790
791 static void compute_time_diff(const struct timeval *status_time)
792 {
793 struct timeval now, tmp, diff;
794 static int count;
795 int sign;
796 const struct timeval max_deviation = {0, 500 * 1000};
797 const int time_smooth = 5;
798
799 gettimeofday(&now, NULL);
800 sign = tv_diff(status_time, &now, &diff);
801 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
802 // sign, sa_time_diff_sign);
803 if (!count) {
804 sa_time_diff_sign = sign;
805 sa_time_diff = diff;
806 count++;
807 return;
808 }
809 if (count > 5) {
810 int s = tv_diff(&diff, &sa_time_diff, &tmp);
811 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
812 PARA_WARNING_LOG("time diff jump: %lims\n",
813 s * tv2ms(&tmp));
814 }
815 count++;
816 sa_time_diff_sign = tv_convex_combination(
817 sa_time_diff_sign * time_smooth, &sa_time_diff,
818 count > 10? sign : sign * time_smooth, &diff,
819 &tmp);
820 sa_time_diff = tmp;
821 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
822 sign > 0? "+" : "-",
823 tv2ms(&diff),
824 sa_time_diff_sign ? "+" : "-",
825 tv2ms(&sa_time_diff)
826 );
827 }
828
829 static void check_stat_line(char *line)
830 {
831 int itemnum;
832 size_t ilen = 0;
833 long unsigned sec, usec;
834 char *tmp;
835
836 // PARA_INFO_LOG("line: %s\n", line);
837 if (!line)
838 return;
839 itemnum = stat_line_valid(line);
840 if (itemnum < 0) {
841 PARA_WARNING_LOG("invalid status line: %s\n", line);
842 return;
843 }
844 tmp = make_message("%s\n", line);
845 stat_client_write(tmp, itemnum);
846 free(tmp);
847 free(stat_item_values[itemnum]);
848 stat_item_values[itemnum] = para_strdup(line);
849 ilen = strlen(status_item_list[itemnum]);
850 switch (itemnum) {
851 case SI_STATUS:
852 playing = strstr(line, "playing")? 1 : 0;
853 break;
854 case SI_FORMAT:
855 free(af_status);
856 af_status = para_strdup(line + ilen + 1);
857 break;
858 case SI_OFFSET:
859 offset_seconds = atoi(line + ilen + 1);
860 break;
861 case SI_LENGTH:
862 length_seconds = atoi(line + ilen + 1);
863 break;
864 case SI_STREAM_START:
865 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
866 server_stream_start.tv_sec = sec;
867 server_stream_start.tv_usec = usec;
868 }
869 break;
870 case SI_CURRENT_TIME:
871 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
872 struct timeval tv = {sec, usec};
873 compute_time_diff(&tv);
874 }
875 break;
876 }
877 }
878
879 static void handle_signal(int sig)
880 {
881 switch (sig) {
882 case SIGCHLD:
883 return check_sigchld();
884 case SIGINT:
885 case SIGTERM:
886 case SIGHUP:
887 PARA_EMERG_LOG("terminating on signal %d\n", sig);
888 clean_exit(EXIT_FAILURE, "caught deadly signal");
889 return;
890 }
891 }
892
893 static void check_timeouts(void)
894 {
895 struct timeval now;
896 int slot_num, timeout = conf.stream_timeout_arg;
897
898 gettimeofday(&now, NULL);
899 FOR_EACH_SLOT(slot_num) {
900 struct slot_info *s = &slot[slot_num];
901 if (s->format < 0)
902 continue;
903 /* check read time */
904 if (s->receiver_node &&
905 now.tv_sec > s->rtime.tv_sec + timeout) {
906 PARA_INFO_LOG("%s stream (slot %d) not ready\n",
907 audio_formats[s->format], slot_num);
908 s->receiver_node->eof = 1;
909 }
910 }
911 }
912
913 static void close_decoder_if_idle(int slot_num)
914 {
915 struct slot_info *s = &slot[slot_num];
916
917 if (s->format < 0)
918 return;
919 if (!s->fc)
920 return;
921 if (s->wng)
922 return;
923 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
924 slot_num, s->fc);
925 close_filters(s->fc);
926 free(s->fc);
927 close_receiver(slot_num);
928 clear_slot(slot_num);
929 }
930
931 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
932 {
933 int i;
934
935 if (audiod_status != AUDIOD_ON)
936 kill_all_decoders();
937 else if (playing)
938 start_current_receiver(&s->now);
939 check_timeouts();
940 FOR_EACH_SLOT(i) {
941 struct receiver_node *rn;
942
943 close_decoder_if_idle(i);
944 if (slot[i].format < 0)
945 continue;
946 rn = slot[i].receiver_node;
947 if (rn && rn->loaded && !slot[i].wng) {
948 PARA_INFO_LOG("no writer in slot %d\n", i);
949 start_stream_writer(i, &s->now);
950 }
951 }
952 }
953
954 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
955 {
956 int i;
957
958 FOR_EACH_SLOT(i) {
959 struct receiver_node *rn = slot[i].receiver_node;
960
961 if (rn && rn->loaded)
962 slot[i].rtime = s->now;
963 }
964 }
965
966 static void init_audiod_task(struct audiod_task *at)
967 {
968 at->task.pre_select = audiod_pre_select;
969 at->task.post_select = audiod_post_select;
970 at->task.private_data = at;
971 at->task.flags = 0;
972 sprintf(at->task.status, "audiod task");
973 }
974
975 static int parse_stream_command(const char *txt, char **cmd)
976 {
977 char *p = strchr(txt, ':');
978 int i;
979
980 if (!p)
981 return -E_MISSING_COLON;
982 p++;
983 FOR_EACH_AUDIO_FORMAT(i) {
984 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
985 continue;
986 *cmd = p;
987 return i;
988 }
989 return -E_UNSUPPORTED_AUDIO_FORMAT;
990 }
991
992 static int add_filter(int format, char *cmdline)
993 {
994 struct audio_format_info *a = &afi[format];
995 int filter_num, nf = a->num_filters;
996
997 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
998 if (filter_num < 0)
999 return filter_num;
1000 a->filters[nf] = &filters[filter_num];
1001 a->num_filters++;
1002 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1003 a->filters[nf]->name);
1004 return filter_num;
1005 }
1006
1007 static int setup_default_filters(void)
1008 {
1009 int i, ret = 1;
1010
1011 FOR_EACH_AUDIO_FORMAT(i) {
1012 struct audio_format_info *a = &afi[i];
1013 char *tmp;
1014 int j;
1015 if (a->num_filters)
1016 continue;
1017 /* add "dec" to audio format name */
1018 tmp = make_message("%sdec", audio_formats[i]);
1019 for (j = 0; filters[j].name; j++)
1020 if (!strcmp(tmp, filters[j].name))
1021 break;
1022 free(tmp);
1023 ret = -E_UNSUPPORTED_FILTER;
1024 if (!filters[j].name)
1025 goto out;
1026 tmp = para_strdup(filters[j].name);
1027 ret = add_filter(i, tmp);
1028 free(tmp);
1029 if (ret < 0)
1030 goto out;
1031 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1032 filters[j].name);
1033 ret = add_filter(i, "wav");
1034 if (ret < 0)
1035 goto out;
1036 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1037 }
1038 out:
1039 return ret;
1040 }
1041
1042 static int init_stream_io(void)
1043 {
1044 int i, ret, receiver_num, nf, nw;
1045 char *cmd;
1046 struct audio_format_info *a;
1047
1048 init_supported_writers();
1049 nw = PARA_MAX(1, conf.writer_given);
1050 PARA_INFO_LOG("allocating space for %d writers\n", nw);
1051 FOR_EACH_AUDIO_FORMAT(i) {
1052 a = &afi[i];
1053 a->writer_conf = para_malloc(nw * sizeof(void *));
1054 a->writers = para_malloc(nw * sizeof(struct writer *));
1055 a->num_writers = 0;
1056 }
1057 for (i = 0; i < conf.writer_given; i++) {
1058 void *wconf;
1059 int writer_num;
1060 ret = parse_stream_command(conf.writer_arg[i], &cmd);
1061 if (ret < 0)
1062 goto out;
1063 a = &afi[ret];
1064 nw = a->num_writers;
1065 wconf = check_writer_arg(cmd, &writer_num);
1066 if (!wconf) {
1067 ret = writer_num;
1068 goto out;
1069 }
1070 a->writers[nw] = &writers[ret];
1071 a->writer_conf[nw] = wconf;
1072 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
1073 nw, writer_names[writer_num]);
1074 a->num_writers++;
1075 }
1076 for (i = 0; receivers[i].name; i++) {
1077 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1078 receivers[i].init(&receivers[i]);
1079 }
1080 for (i = 0; i < conf.receiver_given; i++) {
1081 char *arg = conf.receiver_arg[i];
1082 char *recv = strchr(arg, ':');
1083 ret = -E_MISSING_COLON;
1084 if (!recv)
1085 goto out;
1086 *recv = '\0';
1087 recv++;
1088 ret = get_audio_format_num(arg);
1089 if (ret < 0)
1090 goto out;
1091 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1092 if (!afi[ret].receiver_conf) {
1093 ret = -E_RECV_SYNTAX;
1094 goto out;
1095 }
1096 afi[ret].receiver = &receivers[receiver_num];
1097 }
1098 /* use the first available receiver with no arguments
1099 * for those audio formats for which no receiver
1100 * was specified
1101 */
1102 cmd = para_strdup(receivers[0].name);
1103 FOR_EACH_AUDIO_FORMAT(i) {
1104 a = &afi[i];
1105 if (a->receiver_conf)
1106 continue;
1107 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1108 if (!a->receiver_conf)
1109 return -E_RECV_SYNTAX;
1110 a->receiver = &receivers[receiver_num];
1111 }
1112 free(cmd);
1113 /* filters */
1114 filter_init(filters);
1115 nf = PARA_MAX(2, conf.filter_given) + 1;
1116 PARA_INFO_LOG("allocating space for %d filters\n", nf);
1117 FOR_EACH_AUDIO_FORMAT(i) {
1118 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1119 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1120 }
1121 if (!conf.no_default_filters_given)
1122 return setup_default_filters();
1123 for (i = 0; i < conf.filter_given; i++) {
1124 char *arg = conf.filter_arg[i];
1125 char *filter_name = strchr(arg, ':');
1126 ret = -E_MISSING_COLON;
1127 if (!filter_name)
1128 goto out;
1129 *filter_name = '\0';
1130 filter_name++;
1131 ret = get_audio_format_num(arg);
1132 if (ret < 0)
1133 goto out;
1134 ret = add_filter(ret, filter_name);
1135 if (ret < 0)
1136 goto out;
1137 }
1138 ret = 1;
1139 out:
1140 return ret;
1141 }
1142
1143 static int dump_commands(int fd)
1144 {
1145 char *buf = para_strdup(""), *tmp = NULL;
1146 int i;
1147 ssize_t ret;
1148
1149 FOR_EACH_COMMAND(i) {
1150 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1151 cmds[i].description);
1152 free(buf);
1153 buf = tmp;
1154 }
1155 ret = client_write(fd, buf);
1156 free(buf);
1157 return ret;
1158 }
1159
1160 /*
1161 * command handlers don't close their fd on errors (ret < 0) so that
1162 * its caller can send an error message. Otherwise (ret >= 0) it's up
1163 * to each individual command to close the fd if necessary.
1164 */
1165
1166 static int com_help(int fd, int argc, char **argv)
1167 {
1168 int i, ret;
1169 char *buf;
1170 const char *dflt = "No such command. Available commands:\n";
1171
1172 if (argc < 2) {
1173 ret = dump_commands(fd);
1174 goto out;
1175 }
1176 FOR_EACH_COMMAND(i) {
1177 if (strcmp(cmds[i].name, argv[1]))
1178 continue;
1179 buf = make_message(
1180 "NAME\n\t%s -- %s\n"
1181 "SYNOPSIS\n\tpara_audioc %s\n"
1182 "DESCRIPTION\n%s\n",
1183 argv[1],
1184 cmds[i].description,
1185 cmds[i].synopsis,
1186 cmds[i].help
1187 );
1188 ret = client_write(fd, buf);
1189 free(buf);
1190 goto out;
1191 }
1192 ret = client_write(fd, dflt);
1193 if (ret > 0)
1194 ret = dump_commands(fd);
1195 out:
1196 if (ret >= 0)
1197 close(fd);
1198 return ret;
1199 }
1200
1201 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1202 {
1203 int i, ret;
1204 char *buf = NULL;
1205 long unsigned mask = ~0LU;
1206
1207 if (argc > 1) {
1208 mask = 0;
1209 for (i = 1; i < argc; i++) {
1210 ret = stat_item_valid(argv[i]);
1211 if (ret < 0)
1212 return ret;
1213 mask |= (1 << ret);
1214 }
1215 }
1216 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1217 if (mask & (1 << SI_PLAY_TIME)) {
1218 struct timeval *t = wstime();
1219 char *ts = get_time_string(t);
1220 if (ts) {
1221 ret = client_write(fd, ts);
1222 if (ret < 0)
1223 goto out;
1224 free(ts);
1225 }
1226 }
1227 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1228 char *tmp, *us = uptime_str();
1229 tmp = make_message("%s:%s\n",
1230 status_item_list[SI_AUDIOD_UPTIME], us);
1231 free(us);
1232 ret = client_write(fd, tmp);
1233 if (ret < 0)
1234 goto out;
1235 free(tmp);
1236 }
1237 if (mask & (1 << SI_AUDIOD_STATUS)) {
1238 char *s = audiod_status_string();
1239 ret = client_write(fd, s);
1240 if (ret < 0)
1241 goto out;
1242 free(s);
1243 }
1244 if (mask & (1 << SI_DECODER_FLAGS)) {
1245 char *df =decoder_flags();
1246 ret = client_write(fd, df);
1247 if (ret < 0)
1248 goto out;
1249 free(df);
1250 }
1251
1252 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1253 char *tmp, *v;
1254 if (!((1 << i) & mask))
1255 continue;
1256 v = stat_item_values[i];
1257 tmp = make_message("%s%s%s", buf? buf: "",
1258 v? v : "", v? "\n" : "");
1259 free(buf);
1260 buf = tmp;
1261 }
1262 ret = client_write(fd, buf);
1263 out:
1264 if (ret > 0)
1265 ret = stat_client_add(fd, mask);
1266 free(buf);
1267 return ret;
1268 }
1269
1270 static int com_grab(int fd, char *cmdline)
1271 {
1272 struct grab_client *gc;
1273 struct filter_node *fn;
1274 int i, err;
1275 char *msg;
1276
1277 gc = grab_client_new(fd, cmdline, &err);
1278 if (!gc)
1279 goto err_out;
1280 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1281 if (fn)
1282 activate_grab_client(gc, fn);
1283 return 1;
1284 err_out:
1285 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1286 return err;
1287 if (err == -E_GC_HELP_GIVEN) {
1288 msg = make_message("%s\n\n", grab_client_args_info_usage);
1289 for (i = 0; grab_client_args_info_help[i]; i++) {
1290 char *tmp = make_message("%s%s\n", msg,
1291 grab_client_args_info_help[i]);
1292 free(msg);
1293 msg = tmp;
1294 }
1295 } else
1296 msg = make_message("%s %s\n",
1297 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1298 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1299 err = client_write(fd, msg);
1300 free(msg);
1301 if (err < 0)
1302 return err;
1303 close(fd);
1304 return 1;
1305 }
1306
1307 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1308 {
1309 close(fd);
1310 clean_exit(EXIT_SUCCESS, "terminating on user request");
1311 }
1312
1313 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1314 {
1315 audiod_status = AUDIOD_ON;
1316 close(fd);
1317 return 1;
1318 }
1319
1320 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1321 {
1322 audiod_status = AUDIOD_OFF;
1323 close(fd);
1324 return 1;
1325 }
1326
1327 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1328 {
1329 audiod_status = AUDIOD_STANDBY;
1330 close(fd);
1331 return 1;
1332 }
1333
1334 static int com_cycle(int fd, int argc, char **argv)
1335 {
1336 switch (audiod_status) {
1337 case AUDIOD_ON:
1338 return com_sb(fd, argc, argv);
1339 break;
1340 case AUDIOD_OFF:
1341 return com_on(fd, argc, argv);
1342 break;
1343 case AUDIOD_STANDBY:
1344 return com_off(fd, argc, argv);
1345 break;
1346 }
1347 close(fd);
1348 return 1;
1349 }
1350
1351 static int check_perms(uid_t uid)
1352 {
1353 int i;
1354
1355 if (!conf.user_allow_given)
1356 return 1;
1357 for (i = 0; i < conf.user_allow_given; i++)
1358 if (uid == conf.user_allow_arg[i])
1359 return 1;
1360 return -E_UCRED_PERM;
1361 }
1362
1363 static int handle_connect(void)
1364 {
1365 int i, argc, ret, clifd = -1;
1366 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1367 struct sockaddr_un unix_addr;
1368
1369 ret = para_accept(cmd_task->fd, &unix_addr, sizeof(struct sockaddr_un));
1370 if (ret < 0)
1371 goto out;
1372 clifd = ret;
1373 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1374 if (ret < 0)
1375 goto out;
1376 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1377 ret = check_perms(ret);
1378 if (ret < 0)
1379 goto out;
1380 ret = -E_INVALID_AUDIOD_CMD;
1381 cmd = para_strdup(buf);
1382 p = strchr(cmd, '\n');
1383 if (!p)
1384 p = "";
1385 else {
1386 *p = '\0';
1387 p++;
1388 }
1389 for (i = 0; cmds[i].name; i++) {
1390 int j;
1391 if (strcmp(cmds[i].name, cmd))
1392 continue;
1393 if (cmds[i].handler) {
1394 argc = split_args(buf, &argv, "\n");
1395 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1396 ret = cmds[i].handler(clifd, argc, argv);
1397 goto out;
1398 }
1399 for (j = 0; p[j]; j++)
1400 if (p[j] == '\n')
1401 p[j] = ' ';
1402 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1403 ret = cmds[i].line_handler(clifd, p);
1404 goto out;
1405 }
1406 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1407 out:
1408 free(cmd);
1409 free(buf);
1410 free(argv);
1411 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1412 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1413 client_write(clifd, tmp);
1414 free(tmp);
1415 close(clifd);
1416 }
1417 return ret;
1418 }
1419
1420 static void audiod_get_socket(void)
1421 {
1422 struct sockaddr_un unix_addr;
1423
1424 if (conf.socket_given)
1425 socket_name = para_strdup(conf.socket_arg);
1426 else {
1427 char *hn = para_hostname();
1428 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1429 hn);
1430 free(hn);
1431 }
1432 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1433 if (conf.force_given)
1434 unlink(socket_name);
1435 cmd_task->fd = create_pf_socket(socket_name, &unix_addr,
1436 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1437 if (cmd_task->fd < 0) {
1438 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1439 exit(EXIT_FAILURE); /* do not unlink socket */
1440 }
1441 if (listen(cmd_task->fd , 5) < 0) {
1442 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1443 exit(EXIT_FAILURE); /* do not unlink socket */
1444 }
1445 add_close_on_fork_list(cmd_task->fd);
1446 }
1447
1448 static int open_stat_pipe(void)
1449 {
1450 int ret, fd[3] = {-1, 1, 0};
1451 pid_t pid;
1452 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1453 if (ret >= 0) {
1454 ret = fd[1];
1455 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1456 add_close_on_fork_list(ret);
1457 } else
1458 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1459 return ret;
1460 }
1461
1462 void signal_event_handler(struct task *t)
1463 {
1464 struct signal_task *st = t->private_data;
1465 handle_signal(st->signum);
1466 }
1467
1468 void signal_pre_select(struct sched *s, struct task *t)
1469 {
1470 struct signal_task *st = t->private_data;
1471 t->ret = 1;
1472 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1473 }
1474
1475 void signal_post_select(struct sched *s, struct task *t)
1476 {
1477 struct signal_task *st = t->private_data;
1478 t->ret = 1;
1479 if (!FD_ISSET(st->fd, &s->rfds))
1480 return;
1481 t->ret = -E_SIGNAL_CAUGHT;
1482 st->signum = para_next_signal();
1483 }
1484
1485 void signal_setup_default(struct signal_task *st)
1486 {
1487 st->task.pre_select = signal_pre_select;
1488 st->task.post_select = signal_post_select;
1489 st->task.private_data = st;
1490 st->task.flags = 0;
1491 sprintf(st->task.status, "signal task");
1492 }
1493
1494 static void command_pre_select(struct sched *s, struct task *t)
1495 {
1496 struct command_task *ct = t->private_data;
1497 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1498
1499 }
1500
1501 static void command_post_select(struct sched *s, struct task *t)
1502 {
1503 int ret;
1504 struct command_task *ct = t->private_data;
1505
1506 if (audiod_status != AUDIOD_OFF)
1507 audiod_status_dump();
1508 t->ret = 1; /* always successful */
1509 if (!FD_ISSET(ct->fd, &s->rfds))
1510 return;
1511 ret = handle_connect();
1512 if (ret < 0)
1513 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1514 }
1515
1516 void init_command_task(struct command_task *ct)
1517 {
1518 ct->task.pre_select = command_pre_select;
1519 ct->task.post_select = command_post_select;
1520 ct->task.private_data = ct;
1521 ct->task.flags = 0;
1522 sprintf(ct->task.status, "command task");
1523 }
1524
1525 static void status_pre_select(struct sched *s, struct task *t)
1526 {
1527 struct status_task *st = t->private_data;
1528 t->ret = 1;
1529 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1530 close_stat_pipe();
1531 if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
1532 st->fd = open_stat_pipe();
1533 st->loaded = 0;
1534 st->buf[0] = '\0';
1535 }
1536 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1537 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1538 }
1539
1540 static void status_post_select(struct sched *s, struct task *t)
1541 {
1542 struct status_task *st = t->private_data;
1543 int ret;
1544
1545 t->ret = 1;
1546 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1547 return;
1548 ret = read(st->fd, st->buf + st->loaded,
1549 STRINGSIZE - 1 - st->loaded);
1550 if (ret <= 0) {
1551 close_stat_pipe();
1552 /* avoid busy loop if server is down */
1553 while (sleep(1) > 0)
1554 ; /* try again*/
1555 } else {
1556 st->buf[ret + st->loaded] = '\0';
1557 st->loaded = for_each_line(st->buf, ret + st->loaded,
1558 &check_stat_line);
1559 }
1560 }
1561
1562 static void init_status_task(struct status_task *st)
1563 {
1564 st->task.pre_select = status_pre_select;
1565 st->task.post_select = status_post_select;
1566 st->task.private_data = st;
1567 st->task.flags = 0;
1568 st->loaded = 0;
1569 st->fd = -1;
1570 st->buf[0] = '\0';
1571 sprintf(st->task.status, "status task");
1572 }
1573
1574 static void set_initial_status(void)
1575 {
1576 audiod_status = AUDIOD_ON;
1577 if (!conf.mode_given)
1578 return;
1579 if (!strcmp(conf.mode_arg, "sb")) {
1580 audiod_status = AUDIOD_STANDBY;
1581 return;
1582 }
1583 if (!strcmp(conf.mode_arg, "off")) {
1584 audiod_status = AUDIOD_OFF;
1585 return;
1586 }
1587 if (strcmp(conf.mode_arg, "on"))
1588 PARA_WARNING_LOG("%s", "invalid mode\n");
1589 }
1590
1591 int main(int argc, char *argv[])
1592 {
1593 char *cf;
1594 int ret, i;
1595 struct sched s;
1596
1597 init_sched();
1598
1599 valid_fd_012();
1600 hostname = para_hostname();
1601 cmdline_parser(argc, argv, &conf);
1602 para_drop_privileges(conf.user_arg, conf.group_arg);
1603 cf = configfile_exists();
1604 if (cf) {
1605 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1606 PARA_EMERG_LOG("%s", "parse error in config file\n");
1607 exit(EXIT_FAILURE);
1608 }
1609 }
1610 if (conf.logfile_given)
1611 logfile = open_log(conf.logfile_arg);
1612 log_welcome("para_audiod", conf.loglevel_arg);
1613 i = init_stream_io();
1614 if (i < 0) {
1615 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1616 exit(EXIT_FAILURE);
1617 }
1618 server_uptime(UPTIME_SET);
1619 set_initial_status();
1620 FOR_EACH_SLOT(i)
1621 clear_slot(i);
1622 init_grabbing();
1623 setup_signal_handling();
1624 if (conf.daemon_given)
1625 daemon_init();
1626 audiod_get_socket(); /* doesn't return on errors */
1627
1628 signal_setup_default(sig_task);
1629 sig_task->task.event_handler = signal_event_handler;
1630
1631 init_status_task(stat_task);
1632 init_command_task(cmd_task);
1633 init_audiod_task(at);
1634
1635 register_task(&sig_task->task);
1636 register_task(&cmd_task->task);
1637 register_task(&stat_task->task);
1638 register_task(&at->task);
1639 s.default_timeout.tv_sec = 0;
1640 s.default_timeout.tv_usec = 99 * 1000;
1641 ret = sched(&s);
1642
1643 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1644 return EXIT_FAILURE;
1645 }