audiod: Kill another unused variable
[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 "recv.h"
28 #include "filter.h"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
31 #include "ringbuffer.h"
32
33 #include "error.h"
34 #include "audiod.h"
35 #include "net.h"
36 #include "daemon.h"
37 #include "string.h"
38
39 /** define the array of error lists needed by para_audiod */
40 INIT_AUDIOD_ERRLISTS;
41 /** define the array containing all supported audio formats */
42 DEFINE_AUDIO_FORMAT_ARRAY;
43
44 /**
45 * the possible modes of operation
46 *
47 * - off: disconnect from para_server
48 * - on: receive status information from para_server and play the audio stream
49 * - sb: only receive status information but not the audio stream
50 */
51 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
52
53 /** defines how to handle one supported audio format */
54 struct audio_format_info {
55 /** pointer to the receiver for this audio format */
56 struct receiver *receiver;
57 /** the receiver configuration */
58 void *receiver_conf;
59 /** the number of filters that should be activated for this audio format */
60 unsigned int num_filters;
61 /** pointer to the array of filters to be activated */
62 struct filter **filters;
63 /** pointer to the array of filter configurations */
64 void **filter_conf;
65 /** output of the last filter is written to stdin of this command */
66 char *write_cmd;
67 /** do not start receiver/filters/writer before this time */
68 struct timeval restart_barrier;
69 };
70
71 /**
72 * describes one instance of a receiver-filter-writer chain
73 *
74 * \sa receier_node, receiver, filter, filter_node, filter_chain_info
75 */
76 struct slot_info {
77 /** number of the audio format in this slot */
78 int format;
79 /** the file descriptor of the writer */
80 int write_fd;
81 /** the process id of the writer */
82 pid_t wpid;
83 /** time of the last successful read from the receiver */
84 struct timeval rtime;
85 /** time the last write to the write fd happend */
86 struct timeval wtime;
87 /** writer start time */
88 struct timeval wstime;
89 /** did we include \a write_fd in the fdset */
90 int wcheck;
91 /** set to one if we have sent the TERM signal to \a wpid */
92 int wkilled;
93 /** the receiver info associated with this slot */
94 struct receiver_node *receiver_node;
95 /** the active filter chain */
96 struct filter_chain_info *fci;
97 };
98
99 static struct slot_info slot[MAX_STREAM_SLOTS];
100
101 /** defines one command of para_audiod */
102 struct audiod_command {
103 /** the name of the command */
104 const char *name;
105 /** pointer to the function that handles the command */
106 int (*handler)(int, int, char**);
107 /** one-line description of the command */
108 const char *description;
109 /** summary of the command line options */
110 const char *synopsis;
111 /** the long help text */
112 const char *help;
113 };
114
115 extern const char *status_item_list[NUM_STAT_ITEMS];
116
117 static int com_grab(int, int, char **);
118 static int com_cycle(int, int, char **);
119 static int com_help(int, int, char **);
120 static int com_off(int, int, char **);
121 static int com_on(int, int, char **);
122 static int com_sb(int, int, char **);
123 static int com_stat(int, int, char **);
124 static int com_term(int, int, char **);
125 static int stat_pipe = -1, signal_pipe;
126
127 static struct gengetopt_args_info conf;
128 static struct timeval server_stream_start, sa_time_diff;
129 static int playing, current_decoder = -1,
130 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
131 sa_time_diff_sign = 1, audiod_socket = -1;
132 static char *af_status, /* the audio format announced in server status */
133 *socket_name, *hostname;
134 /** how many status items to remember */
135 #define RINGBUFFER_SIZE 32
136 static void *stat_item_ringbuf;
137 static FILE *logfile;
138 static const struct timeval restart_delay = {0, 300 * 1000};
139
140 static struct audio_format_info afi[] = {
141
142 [AUDIO_FORMAT_MP3] =
143 {
144 .write_cmd = "para_play",
145 },
146 [AUDIO_FORMAT_OGG] =
147 {
148 .write_cmd = "para_play",
149 },
150 };
151
152 static struct audiod_command cmds[] = {
153 {
154 .name = "cycle",
155 .handler = com_cycle,
156 .description = "switch to next mode",
157 .synopsis = "cycle",
158 .help =
159
160 "on -> standby -> off -> on\n"
161
162 },
163 {
164 .name = "grab",
165 .handler = com_grab,
166 .description = "grab the audio stream",
167 .synopsis = "-- grab [grab_options]",
168 .help =
169 "grab ('splice') the audio stream at any position in the filter \n"
170 "chain and send that data back to the client. \n"
171 "Available options:\n\n"
172 GRAB_HELP_TXT
173 },
174 {
175 .name = "help",
176 .handler = com_help,
177 .description = "display command list or help for given command",
178 .synopsis = "help [command]",
179 .help =
180
181 "When I was younger, so much younger than today, I never needed\n"
182 "anybody's help in any way. But now these days are gone, I'm not so\n"
183 "self assured. Now I find I've changed my mind and opened up the doors.\n"
184 "\n"
185 " -- Beatles: Help\n"
186
187 },
188 {
189 .name = "off",
190 .handler = com_off,
191 .description = "deactivate para_audiod",
192 .synopsis = "off",
193 .help =
194
195 "Close connection to para_server and stop all decoders.\n"
196
197 },
198 {
199 .name = "on",
200 .handler = com_on,
201 .description = "activate para_audiod",
202 .synopsis = "on",
203 .help =
204
205 "Establish connection to para_server, retrieve para_server's current\n"
206 "status. If playing, start corresponding decoder. Otherwise stop\n"
207 "all decoders.\n"
208
209 },
210 {
211 .name = "sb",
212 .handler = com_sb,
213 .description = "enter standby mode",
214 .synopsis = "sb",
215 .help =
216
217 "Stop all decoders but leave connection to para_server open.\n"
218
219 },
220 {
221 .name = "stat",
222 .handler = com_stat,
223 .description = "print status information",
224 .synopsis = "stat",
225 .help =
226
227 "Add para_audiod status information to para_server's status information\n"
228 "and dump everything to stdout.\n"
229
230 },
231 {
232 .name = "term",
233 .handler = com_term,
234 .description = "terminate audiod",
235 .synopsis = "term",
236 .help =
237
238 "Stop all decoders, shut down connection to para_server and exit.\n"
239
240 },
241 {
242 .name = NULL,
243 }
244 };
245
246 /** iterate over all slots */
247 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
248 /** iterate over all supported audio formats */
249 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
250 /** iterate over the array of all audiod commands */
251 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
252
253 /**
254 * get the audio format number
255 * \param name the name of the audio format
256 *
257 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
258 * \a name is not a supported audio format.
259 */
260 int get_audio_format_num(char *name)
261 {
262 int i;
263 FOR_EACH_AUDIO_FORMAT(i)
264 if (!strcmp(name, audio_formats[i]))
265 return i;
266 return -E_UNSUPPORTED_AUDIO_FORMAT;
267 }
268
269 /*
270 * log function. first argument is loglevel.
271 */
272 void para_log(int ll, char* fmt,...)
273 {
274 va_list argp;
275 FILE *outfd;
276 struct tm *tm;
277 time_t t1;
278 char str[MAXLINE] = "";
279
280 if (ll < conf.loglevel_arg)
281 return;
282 if (!logfile && conf.logfile_given)
283 logfile = open_log(conf.logfile_arg);
284 if (!logfile && conf.daemon_given)
285 return;
286 if (!logfile) {
287 if (ll < WARNING)
288 outfd = stdout;
289 else
290 outfd = stderr;
291 } else
292 outfd = logfile;
293 time(&t1);
294 tm = localtime(&t1);
295 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
296 fprintf(outfd, "%s %s ", str, hostname);
297 if (conf.loglevel_arg <= INFO)
298 fprintf(outfd, "%i ", ll);
299 va_start(argp, fmt);
300 vfprintf(outfd, fmt, argp);
301 va_end(argp);
302 }
303
304 static int client_write(int fd, const char *buf)
305 {
306 size_t len = strlen(buf);
307 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
308 }
309
310 static char *get_time_string(struct timeval *newest_stime)
311 {
312 struct timeval now, diff, adj_stream_start, tmp;
313 int total = 0, use_server_time = 1;
314
315 if (!playing)
316 return make_message("%s:", length_seconds?
317 "" : status_item_list[SI_PLAY_TIME]);
318 if (audiod_status == AUDIOD_OFF)
319 goto out;
320 if (sa_time_diff_sign > 0)
321 tv_diff(&server_stream_start, &sa_time_diff,
322 &adj_stream_start);
323 else
324 tv_add(&server_stream_start, &sa_time_diff,
325 &adj_stream_start);
326 tmp = adj_stream_start;
327 if (newest_stime && audiod_status == AUDIOD_ON) {
328 tv_diff(newest_stime, &adj_stream_start, &diff);
329 if (tv2ms(&diff) < 5000) {
330 tmp = *newest_stime;
331 use_server_time = 0;
332 }
333 }
334 gettimeofday(&now, NULL);
335 tv_diff(&now, &tmp, &diff);
336 total = diff.tv_sec + offset_seconds;
337 if (total > length_seconds)
338 total = length_seconds;
339 if (total < 0)
340 total = 0;
341 out:
342 return make_message(
343 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
344 status_item_list[SI_PLAY_TIME],
345 use_server_time? "~" : "",
346 total / 60,
347 total % 60,
348 (length_seconds - total) / 60,
349 (length_seconds - total) % 60,
350 length_seconds? (total * 100 + length_seconds / 2) /
351 length_seconds : 0,
352 length_seconds / 60,
353 length_seconds % 60
354 );
355 }
356
357 static char *audiod_status_string(void)
358 {
359 int i;
360 struct timeval *newest_stime = NULL;
361 char *ret, *time_string, *uptime_string, *decoder_flags =
362 para_malloc((MAX_STREAM_SLOTS + 1) * sizeof(char));
363
364 FOR_EACH_SLOT(i) {
365 struct slot_info *s = &slot[i];
366 char flag = '0';
367 if (s->receiver_node)
368 flag += 1;
369 if (s->wpid > 0)
370 flag += 2;
371 if (flag != '0')
372 flag += s->format * 4;
373 decoder_flags[i] = flag;
374 if (s->wpid <= 0)
375 continue;
376 if (newest_stime && tv_diff(&s->wstime, newest_stime, NULL) <= 0)
377 continue;
378 newest_stime = &s->wstime;
379 }
380 decoder_flags[MAX_STREAM_SLOTS] = '\0';
381 time_string = get_time_string(newest_stime);
382 uptime_string = uptime_str();
383 ret = make_message("%s:%s\n%s:%s\n%s:%s\n%s",
384 status_item_list[SI_AUDIOD_UPTIME], uptime_string,
385 status_item_list[SI_DECODER_FLAGS], decoder_flags,
386 status_item_list[SI_AUDIOD_STATUS], audiod_status == AUDIOD_ON?
387 "on" : (audiod_status == AUDIOD_OFF? "off": "sb"),
388 time_string);
389 free(uptime_string);
390 free(decoder_flags);
391 free(time_string);
392 return ret;
393 }
394
395 static char *configfile_exists(void)
396 {
397 static char *config_file;
398
399 if (!config_file) {
400 char *home = para_homedir();
401 config_file = make_message("%s/.paraslash/audiod.conf", home);
402 free(home);
403 }
404 return file_exists(config_file)? config_file : NULL;
405 }
406
407 static void setup_signal_handling(void)
408 {
409 signal_pipe = para_signal_init();
410 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe);
411 para_install_sighandler(SIGINT);
412 para_install_sighandler(SIGTERM);
413 para_install_sighandler(SIGCHLD);
414 para_install_sighandler(SIGHUP);
415 signal(SIGPIPE, SIG_IGN);
416 }
417
418 static void audiod_status_dump(void)
419 {
420 static char *prev_status;
421 char *tmp = audiod_status_string();
422
423 if (!prev_status || strcmp(tmp, prev_status))
424 stat_client_write(tmp);
425 free(prev_status);
426 prev_status = tmp;
427 }
428
429 static void clear_slot(int slot_num)
430 {
431 struct slot_info *s = &slot[slot_num];
432
433 PARA_INFO_LOG("clearing slot %d\n", slot_num);
434 memset(s, 0, sizeof(struct slot_info));
435 s->format = -1;
436 }
437
438 static void kill_stream_writer(int slot_num)
439 {
440 struct slot_info *s = &slot[slot_num];
441
442 if (s->format < 0 || s->wkilled || s->wpid <= 0)
443 return;
444 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
445 s->wpid, audio_formats[s->format], slot_num);
446 kill(s->wpid, SIGTERM);
447 s->wkilled = 1;
448 s->fci->error = 1;
449 }
450
451 static void set_restart_barrier(int format, struct timeval *now)
452 {
453 struct timeval tmp;
454
455 if (now)
456 tmp = *now;
457 else
458 gettimeofday(&tmp, NULL);
459 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
460 }
461
462 static void close_receiver(int slot_num)
463 {
464 struct slot_info *s = &slot[slot_num];
465 struct audio_format_info *a;
466
467 if (s->format < 0 || !s->receiver_node)
468 return;
469 a = &afi[s->format];
470 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
471 audio_formats[s->format] , slot_num);
472 a->receiver->close(s->receiver_node);
473 free(s->receiver_node);
474 s->receiver_node = NULL;
475 set_restart_barrier(s->format, NULL);
476 }
477
478 static void kill_all_decoders(void)
479 {
480 int i;
481
482 FOR_EACH_SLOT(i)
483 if (slot[i].format >= 0) {
484 PARA_INFO_LOG("stopping decoder in slot %d\n", i);
485 kill_stream_writer(i);
486 }
487 }
488
489 static void check_sigchld(void)
490 {
491 pid_t pid;
492 int i;
493 struct timeval now;
494 gettimeofday(&now, NULL);
495
496 reap_next_child:
497 pid = para_reap_child();
498 if (pid <= 0)
499 return;
500 FOR_EACH_SLOT(i) {
501 struct slot_info *s = &slot[i];
502 long lifetime;
503 if (s->format < 0)
504 continue;
505 if (pid == s->wpid) {
506 s->wpid = -1;
507 lifetime = now.tv_sec - s->wstime.tv_sec;
508 PARA_INFO_LOG("%s stream writer in slot %d died "
509 "after %li secs\n",
510 audio_formats[s->format], i, lifetime);
511 set_restart_barrier(s->format, &now);
512 goto reap_next_child;
513 }
514 }
515 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
516 goto reap_next_child;
517 }
518
519 static int get_empty_slot(void)
520 {
521 int i;
522 struct slot_info *s;
523
524 FOR_EACH_SLOT(i) {
525 s = &slot[i];
526 if (s->format < 0) {
527 clear_slot(i);
528 return i;
529 }
530 if (s->write_fd > 0 || s->wpid > 0)
531 continue;
532 if (s->receiver_node)
533 continue;
534 if (s->fci)
535 continue;
536 clear_slot(i);
537 return i;
538 }
539 return -E_NO_MORE_SLOTS;
540 }
541
542 static int decoder_running(int format)
543 {
544 int i, ret = 0;
545 struct slot_info *s;
546
547 FOR_EACH_SLOT(i) {
548 s = &slot[i];
549 if (s->format == format && s->receiver_node)
550 ret |= 1;
551 if (s->format == format && s->wpid > 0)
552 ret |= 2;
553 }
554 return ret;
555 }
556
557 static void close_stat_pipe(void)
558 {
559 char *msg;
560 int i;
561
562 if (stat_pipe < 0)
563 return;
564 PARA_NOTICE_LOG("%s", "closing status pipe\n");
565 close(stat_pipe);
566 del_close_on_fork_list(stat_pipe);
567 stat_pipe = -1;
568 kill_all_decoders();
569 for (i = 0; i < RINGBUFFER_SIZE; i++)
570 free(ringbuffer_add(stat_item_ringbuf, para_strdup(NULL)));
571 dump_empty_status();
572 length_seconds = 0;
573 offset_seconds = 0;
574 audiod_status_dump();
575 playing = 0;
576 msg = make_message("%s:no connection to para_server\n",
577 status_item_list[SI_STATUS_BAR]);
578 free(ringbuffer_add(stat_item_ringbuf, msg));
579 stat_client_write(msg);
580 }
581
582 static void __noreturn clean_exit(int status, const char *msg)
583 {
584 PARA_EMERG_LOG("%s\n", msg);
585 kill_all_decoders();
586 if (socket_name)
587 unlink(socket_name);
588 if (stat_pipe >= 0)
589 close_stat_pipe();
590 exit(status);
591 }
592
593 static char *glob_cmd(char *cmd)
594 {
595 char *ret, *replacement;
596 struct timeval tmp, delay, rss; /* real stream start */
597
598 delay.tv_sec = conf.stream_delay_arg / 1000;
599 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
600 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
601 if (sa_time_diff_sign < 0)
602 tv_add(&server_stream_start, &sa_time_diff, &rss);
603 else
604 tv_diff(&server_stream_start, &sa_time_diff, &rss);
605 tv_add(&rss, &delay, &tmp);
606 replacement = make_message("%lu:%lu", tmp.tv_sec, tmp.tv_usec);
607 ret = s_a_r(cmd, "STREAM_START", replacement);
608 free(replacement);
609 if (!ret)
610 goto out;
611 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
612 {
613 struct timeval now;
614 gettimeofday(&now, NULL);
615 PARA_INFO_LOG("now: %lu:%lu\n", now.tv_sec, now.tv_usec);
616 }
617 out:
618 return ret;
619 }
620
621 /** get the number of filters for the given audio format */
622 int num_filters(int audio_format_num)
623 {
624 return afi[audio_format_num].num_filters;
625 }
626
627 static void open_filters(int slot_num)
628 {
629 struct slot_info *s = &slot[slot_num];
630 struct audio_format_info *a = &afi[s->format];
631 int nf = a->num_filters;
632 int i;
633
634 s->fci = para_calloc(sizeof(struct filter_chain_info));
635 INIT_LIST_HEAD(&s->fci->filters);
636 if (!nf)
637 return;
638 s->fci->inbuf = s->receiver_node->buf;
639 s->fci->in_loaded = &s->receiver_node->loaded;
640 s->fci->outbuf = s->receiver_node->buf;
641 s->fci->out_loaded = &s->receiver_node->loaded;
642 s->fci->eof = &s->receiver_node->eof;
643 for (i = 0; i < nf; i++) {
644 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
645 fn->conf = a->filter_conf[i];
646 fn->fci = s->fci;
647 fn->filter = a->filters[i];
648 INIT_LIST_HEAD(&fn->callbacks);
649 list_add_tail(&fn->node, &s->fci->filters);
650 fn->filter->open(fn);
651 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
652 audio_formats[s->format], i + 1, nf,
653 fn->filter->name, slot_num);
654 s->fci->outbuf = fn->buf;
655 s->fci->out_loaded = &fn->loaded;
656 }
657 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s->fci,
658 s->fci->outbuf);
659 }
660
661 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
662 {
663 struct filter_node *fn;
664 int i, j;
665
666 FOR_EACH_SLOT(i) {
667 struct slot_info *s = &slot[i];
668 if (s->format < 0 || !s->fci)
669 continue;
670 if (slot_num >= 0 && slot_num != i)
671 continue;
672 if (format >= 0 && s->format != format)
673 continue;
674 if (num_filters(i) < filternum)
675 continue;
676 /* success */
677 j = 1;
678 list_for_each_entry(fn, &s->fci->filters, node)
679 if (filternum <= 0 || j++ == filternum)
680 break;
681 return fn;
682 }
683 return NULL;
684 }
685
686 static void start_stream_writer(int slot_num)
687 {
688 int ret, fds[3] = {1, -1, -1};
689 struct slot_info *s = &slot[slot_num];
690 struct audio_format_info *a = &afi[s->format];
691 char *glob = glob_cmd(a->write_cmd);
692
693 PARA_INFO_LOG("starting stream writer: %s\n", glob? glob : a->write_cmd);
694 open_filters(slot_num);
695
696 ret = para_exec_cmdline_pid(&s->wpid, glob? glob : a->write_cmd, fds);
697 free(glob);
698 if (ret < 0) {
699 PARA_ERROR_LOG("exec failed (%d)\n", ret);
700 return;
701 }
702 s->write_fd = fds[0];
703 add_close_on_fork_list(s->write_fd);
704 /* we write to this fd in do_select, so we need non-blocking */
705 fcntl(s->write_fd, F_SETFL, O_NONBLOCK);
706 gettimeofday(&s->wstime, NULL);
707 current_decoder = slot_num;
708 activate_inactive_grab_clients(slot_num, s->format, &s->fci->filters);
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
717 slot_num = get_empty_slot();
718 if (slot_num < 0)
719 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
720 s = &slot[slot_num];
721 s->format = format;
722 gettimeofday(&s->rtime, NULL);
723 s->wtime = s->rtime;
724 s->receiver_node = para_calloc(sizeof(struct receiver_node));
725 s->receiver_node->conf = a->receiver_conf;
726 ret = a->receiver->open(s->receiver_node);
727 if (ret < 0) {
728 PARA_ERROR_LOG("failed to open receiver (%s)\n",
729 PARA_STRERROR(-ret));
730 free(s->receiver_node);
731 s->receiver_node = NULL;
732 return;
733 }
734 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
735 audio_formats[s->format], a->receiver->name, slot_num);
736 }
737
738 static int is_frozen(int format)
739 {
740 struct timeval now;
741 struct audio_format_info *a = &afi[format];
742
743 gettimeofday(&now, NULL);
744 return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
745 }
746
747 static void start_current_receiver(void)
748 {
749 int i;
750
751 if (!af_status)
752 return;
753 i = get_audio_format_num(af_status);
754 if (i < 0)
755 return;
756 if ((decoder_running(i) & 1) || is_frozen(i))
757 return;
758 open_receiver(i);
759 }
760
761 static void compute_time_diff(const struct timeval *status_time)
762 {
763 struct timeval now, tmp, diff;
764 static int count;
765 int sign;
766 const struct timeval max_deviation = {0, 500 * 1000};
767 const int time_smooth = 5;
768
769 gettimeofday(&now, NULL);
770 sign = tv_diff(status_time, &now, &diff);
771 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
772 // sign, sa_time_diff_sign);
773 if (!count) {
774 sa_time_diff_sign = sign;
775 sa_time_diff = diff;
776 count++;
777 return;
778 }
779 if (count > 5) {
780 int s = tv_diff(&diff, &sa_time_diff, &tmp);
781 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
782 PARA_WARNING_LOG("time diff jump: %lims\n",
783 s * tv2ms(&tmp));
784 }
785 count++;
786 sa_time_diff_sign = tv_convex_combination(
787 sa_time_diff_sign * time_smooth, &sa_time_diff,
788 count > 10? sign : sign * time_smooth, &diff,
789 &tmp);
790 sa_time_diff = tmp;
791 PARA_INFO_LOG("time diff (cur/avg): "
792 "%li:%lu/%li:%lu\n",
793 sign * diff.tv_sec, (diff.tv_usec + 500) / 1000,
794 sa_time_diff_sign * sa_time_diff.tv_sec,
795 (sa_time_diff.tv_usec + 500)/ 1000);
796 }
797
798 static void check_stat_line(char *line)
799 {
800 int itemnum;
801 size_t ilen = 0;
802 struct timeval tv;
803
804 if (!line)
805 return;
806 free(ringbuffer_add(stat_item_ringbuf, para_strdup(line)));
807 stat_client_write(line);
808 itemnum = stat_line_valid(line);
809 if (itemnum < 0)
810 return;
811 ilen = strlen(status_item_list[itemnum]);
812 switch (itemnum) {
813 case SI_STATUS:
814 playing = strstr(line, "playing")? 1 : 0;
815 break;
816 case SI_FORMAT:
817 free(af_status);
818 af_status = para_strdup(line + ilen + 1);
819 break;
820 case SI_OFFSET:
821 offset_seconds = atoi(line + ilen + 1);
822 break;
823 case SI_LENGTH:
824 length_seconds = atoi(line + ilen + 1);
825 break;
826 case SI_STREAM_START:
827 if (sscanf(line + ilen + 1, "%lu.%lu",
828 &tv.tv_sec, &tv.tv_usec) == 2)
829 server_stream_start = tv;
830 break;
831 case SI_CURRENT_TIME:
832 if (sscanf(line + ilen + 1, "%lu.%lu", &tv.tv_sec,
833 &tv.tv_usec) == 2)
834 compute_time_diff(&tv);
835 break;
836 }
837 }
838
839 static void handle_signal(int sig)
840 {
841 switch (sig) {
842 case SIGCHLD:
843 return check_sigchld();
844 case SIGINT:
845 case SIGTERM:
846 case SIGHUP:
847 PARA_EMERG_LOG("terminating on signal %d\n", sig);
848 clean_exit(EXIT_FAILURE, "caught deadly signal");
849 return;
850 }
851 }
852
853 static void check_timeouts(void)
854 {
855 struct timeval now;
856 int slot_num, timeout = conf.stream_timeout_arg;
857
858 gettimeofday(&now, NULL);
859 FOR_EACH_SLOT(slot_num) {
860 struct slot_info *s = &slot[slot_num];
861 if (s->format < 0)
862 continue;
863 /* check read time */
864 if (s->receiver_node &&
865 now.tv_sec > s->rtime.tv_sec + timeout) {
866 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
867 audio_formats[s->format], slot_num);
868 if (s->fci)
869 s->fci->error = 42;
870 else
871 close_receiver(slot_num);
872 }
873 /* check write time */
874 if (s->wpid > 0 && !s->wkilled &&
875 now.tv_sec > s->wtime.tv_sec + timeout) {
876 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
877 audio_formats[s->format], slot_num);
878 if (s->fci)
879 s->fci->error = 42;
880 }
881 }
882 }
883
884 static size_t get_loaded_bytes(int slot_num)
885 {
886 size_t loaded = 0;
887 struct slot_info *s = &slot[slot_num];
888 struct receiver_node *rn = s->receiver_node;
889
890 if (s->format < 0)
891 goto out;
892
893 if (afi[s->format].num_filters) {
894 if (s->fci)
895 loaded = *s->fci->out_loaded;
896 } else {
897 if (rn)
898 loaded = rn->loaded;
899 }
900 out:
901 return loaded;
902 }
903
904
905 static void close_decoder_if_idle(int slot_num)
906 {
907 struct slot_info *s = &slot[slot_num];
908 struct receiver_node *rn = s->receiver_node;
909
910 if (s->format < 0)
911 return;
912 if (!s->fci)
913 return;
914 if (!rn->eof && !s->fci->error && s->wpid > 0)
915 return;
916 if (!s->fci->error && s->wpid > 0) { /* eof */
917 if (filter_io(s->fci) > 0)
918 return;
919 if (get_loaded_bytes(slot_num))
920 return;
921 }
922 if (s->write_fd > 0) {
923 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num,
924 s->write_fd);
925 close(s->write_fd);
926 del_close_on_fork_list(s->write_fd);
927 s->write_fd = -1;
928 }
929 if (s->wpid > 0)
930 return; /* wait until writer dies before closing filters */
931 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
932 slot_num, s->fci);
933 close_filters(s->fci);
934 free(s->fci);
935 close_receiver(slot_num);
936 clear_slot(slot_num);
937 }
938
939 static int set_stream_fds(fd_set *wfds)
940 {
941 int i, max_fileno = -1;
942
943 check_timeouts();
944 FOR_EACH_SLOT(i) {
945 struct slot_info *s = &slot[i];
946 struct audio_format_info *a;
947 struct receiver_node *rn;
948
949 close_decoder_if_idle(i);
950 s->wcheck = 0;
951 if (s->format < 0)
952 continue;
953 a = &afi[s->format];
954 rn = s->receiver_node;
955 if (rn && rn->loaded && !s->wpid) {
956 PARA_INFO_LOG("no writer in slot %d\n", i);
957 start_stream_writer(i);
958 }
959 if (s->write_fd <= 0)
960 continue;
961 if (!get_loaded_bytes(i))
962 continue;
963 FD_SET(s->write_fd, wfds);
964 s->wcheck = 1;
965 max_fileno = MAX(s->write_fd, max_fileno);
966 }
967 // PARA_INFO_LOG("return %d\n", max_fileno);
968 return max_fileno;
969 }
970
971 static int write_audio_data(int slot_num)
972 {
973 struct slot_info *s = &slot[slot_num];
974 struct audio_format_info *a = &afi[s->format];
975 struct receiver_node *rn = s->receiver_node;
976 int rv;
977 char **buf;
978 size_t *len;
979
980 if (a->num_filters) {
981 buf = &s->fci->outbuf;
982 len = s->fci->out_loaded;
983 } else {
984 buf = &rn->buf;
985 len = &rn->loaded;
986 }
987 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
988 rv = write(s->write_fd, *buf, *len);
989 PARA_DEBUG_LOG("wrote %d/%zd\n", rv, *len);
990 if (rv < 0) {
991 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
992 slot_num, s->write_fd, strerror(errno));
993 *len = 0;
994 s->fci->error = E_WRITE_AUDIO_DATA;
995 } else if (rv != *len) {
996 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
997 audio_formats[s->format], rv, *len, slot_num);
998 *len -= rv;
999 memmove(*buf, *buf + rv, *len);
1000 } else
1001 *len = 0;
1002 if (rv > 0)
1003 gettimeofday(&s->wtime, NULL);
1004 return rv;
1005 }
1006
1007 static void slot_io(fd_set *wfds)
1008 {
1009 int ret, i;
1010
1011 FOR_EACH_SLOT(i) {
1012 struct slot_info *s = &slot[i];
1013 struct receiver_node *rn = s->receiver_node;
1014
1015 if (rn && rn->loaded)
1016 gettimeofday(&s->rtime, NULL);
1017 if (s->format >= 0 && s->write_fd > 0 && s->fci) {
1018 ret = filter_io(s->fci);
1019 if (ret < 0)
1020 s->fci->error = -ret;
1021 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1022 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1023 }
1024 if (s->write_fd <= 0 || !s->wcheck || !FD_ISSET(s->write_fd, wfds))
1025 continue;
1026 write_audio_data(i);
1027 }
1028 }
1029
1030 static int parse_stream_command(const char *txt, char **cmd)
1031 {
1032 char *p = strchr(txt, ':');
1033 int i;
1034
1035 if (!p)
1036 return -E_MISSING_COLON;
1037 p++;
1038 FOR_EACH_AUDIO_FORMAT(i) {
1039 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1040 continue;
1041 *cmd = p;
1042 return i;
1043 }
1044 return -E_UNSUPPORTED_AUDIO_FORMAT;
1045 }
1046
1047 static int add_filter(int format, char *cmdline)
1048 {
1049 struct audio_format_info *a = &afi[format];
1050 int filter_num, nf = a->num_filters;
1051
1052 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1053 if (filter_num < 0)
1054 return filter_num;
1055 a->filters[nf] = &filters[filter_num];
1056 a->num_filters++;
1057 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1058 a->filters[nf]->name);
1059 return filter_num;
1060 }
1061
1062 static int setup_default_filters(void)
1063 {
1064 int i, ret = 1;
1065
1066 FOR_EACH_AUDIO_FORMAT(i) {
1067 struct audio_format_info *a = &afi[i];
1068 char *tmp;
1069 int j;
1070 if (a->num_filters)
1071 continue;
1072 /* add "dec" to audio format name */
1073 tmp = make_message("%sdec", audio_formats[i]);
1074 for (j = 0; filters[j].name; j++)
1075 if (!strcmp(tmp, filters[j].name))
1076 break;
1077 free(tmp);
1078 ret = -E_UNSUPPORTED_FILTER;
1079 if (!filters[j].name)
1080 goto out;
1081 tmp = para_strdup(filters[j].name);
1082 ret = add_filter(i, tmp);
1083 free(tmp);
1084 if (ret < 0)
1085 goto out;
1086 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i], filters[j].name);
1087 ret = add_filter(i, "wav");
1088 if (ret < 0)
1089 goto out;
1090 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1091 }
1092 out:
1093 return ret;
1094 }
1095
1096 static int init_stream_io(void)
1097 {
1098 int i, ret, receiver_num;
1099 char *cmd;
1100
1101 for (i = 0; i < conf.stream_write_cmd_given; i++) {
1102 ret = parse_stream_command(conf.stream_write_cmd_arg[i], &cmd);
1103 if (ret < 0)
1104 goto out;
1105 afi[ret].write_cmd = para_strdup(cmd);
1106 PARA_INFO_LOG("%s write command: %s\n", audio_formats[ret], afi[ret].write_cmd);
1107 }
1108 for (i = 0; receivers[i].name; i++) {
1109 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1110 receivers[i].init(&receivers[i]);
1111 }
1112 for (i = 0; i < conf.receiver_given; i++) {
1113 char *arg = conf.receiver_arg[i];
1114 char *recv = strchr(arg, ':');
1115 ret = -E_MISSING_COLON;
1116 if (!recv)
1117 goto out;
1118 *recv = '\0';
1119 recv++;
1120 ret = get_audio_format_num(arg);
1121 if (ret < 0)
1122 goto out;
1123 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1124 if (!afi[ret].receiver_conf) {
1125 ret = -E_RECV_SYNTAX;
1126 goto out;
1127 }
1128 afi[ret].receiver = &receivers[receiver_num];
1129 }
1130 /* use the first available receiver with no arguments
1131 * for those audio formats for which no receiver
1132 * was specified
1133 */
1134 cmd = para_strdup(receivers[0].name);
1135 FOR_EACH_AUDIO_FORMAT(i) {
1136 struct audio_format_info *a = &afi[i];
1137 if (a->receiver_conf)
1138 continue;
1139 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1140 if (!a->receiver_conf)
1141 return -E_RECV_SYNTAX;
1142 a->receiver = &receivers[receiver_num];
1143 }
1144 free(cmd);
1145 /* filters */
1146 filter_init(filters);
1147 FOR_EACH_AUDIO_FORMAT(i) {
1148 afi[i].filter_conf = para_malloc((conf.filter_given + 1) * sizeof(char *));
1149 afi[i].filters = para_malloc((conf.filter_given + 1) * sizeof(struct filter *));
1150 }
1151 if (!conf.no_default_filters_given)
1152 return setup_default_filters();
1153 for (i = 0; i < conf.filter_given; i++) {
1154 char *arg = conf.filter_arg[i];
1155 char *filter_name = strchr(arg, ':');
1156 ret = -E_MISSING_COLON;
1157 if (!filter_name)
1158 goto out;
1159 *filter_name = '\0';
1160 filter_name++;
1161 ret = get_audio_format_num(arg);
1162 if (ret < 0)
1163 goto out;
1164 ret = add_filter(ret, filter_name);
1165 if (ret < 0)
1166 goto out;
1167 }
1168 ret = 1;
1169 out:
1170 return ret;
1171 }
1172
1173 static int dump_commands(int fd)
1174 {
1175 char *buf = para_strdup(""), *tmp = NULL;
1176 int i;
1177 ssize_t ret;
1178
1179 FOR_EACH_COMMAND(i) {
1180 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1181 cmds[i].description);
1182 free(buf);
1183 buf = tmp;
1184 }
1185 ret = client_write(fd, buf);
1186 free(buf);
1187 return ret;
1188 }
1189
1190 /*
1191 * command handlers don't close their fd on errors (ret < 0) so that
1192 * its caller can send an error message. Otherwise (ret >= 0) it's up
1193 * to each individual command to close the fd if necessary.
1194 */
1195
1196 static int com_help(int fd, int argc, char **argv)
1197 {
1198 int i, ret;
1199 char *buf;
1200 const char *dflt = "No such command. Available commands:\n";
1201
1202 if (argc < 2) {
1203 ret = dump_commands(fd);
1204 goto out;
1205 }
1206 FOR_EACH_COMMAND(i) {
1207 if (strcmp(cmds[i].name, argv[1]))
1208 continue;
1209 buf = make_message(
1210 "NAME\n\t%s -- %s\n"
1211 "SYNOPSIS\n\tpara_audioc %s\n"
1212 "DESCRIPTION\n%s\n",
1213 argv[1],
1214 cmds[i].description,
1215 cmds[i].synopsis,
1216 cmds[i].help
1217 );
1218 ret = client_write(fd, buf);
1219 free(buf);
1220 goto out;
1221 }
1222 ret = client_write(fd, dflt);
1223 if (ret > 0)
1224 ret = dump_commands(fd);
1225 out:
1226 if (ret >= 0)
1227 close(fd);
1228 return ret;
1229 }
1230
1231 static int com_stat(int fd, __unused int argc, __unused char **argv)
1232 {
1233 int i, ret;
1234 char *buf = audiod_status_string();
1235
1236 buf = para_strcat(buf, "\n");
1237 for (i = RINGBUFFER_SIZE - 1; i >= 0; i--) {
1238 char *tmp, *line = ringbuffer_get(stat_item_ringbuf, i);
1239 if (!line)
1240 continue;
1241 tmp = make_message("%s\n", line);
1242 buf = para_strcat(buf, tmp);
1243 free(tmp);
1244 }
1245 ret = client_write(fd, buf);
1246 if (ret > 0)
1247 ret = stat_client_add(fd);
1248 free(buf);
1249 return ret;
1250 }
1251
1252 #if 0
1253 static char *list_filters(void)
1254 {
1255 int i, j;
1256 char *tmp, *msg = make_message("format\tnum\tcmd\n");
1257
1258 FOR_EACH_AUDIO_FORMAT(i) {
1259 for (j = 0; j < afi[i].num_filters; j++) {
1260 tmp = make_message("%s\t%i\t%s\n",
1261 afi[i].name, j, afi[i].filter_cmds[j]);
1262 msg = para_strcat(msg, tmp);
1263 free(tmp);
1264 }
1265 tmp = make_message("%s\t%i\t%s\n", afi[i].name,
1266 j, afi[i].write_cmd);
1267 msg = para_strcat(msg, tmp);
1268 free(tmp);
1269 }
1270 return msg;
1271 }
1272 #endif
1273
1274 static int com_grab(int fd, int argc, char **argv)
1275 {
1276 struct grab_client *gc;
1277 struct filter_node *fn;
1278 int err;
1279
1280 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1281 gc = grab_client_new(fd, argc, argv, &err);
1282 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1283 if (!gc)
1284 goto err_out;
1285 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1286 if (fn)
1287 activate_grab_client(gc, fn);
1288 return 1;
1289 err_out:
1290 if (err != -E_GC_HELP_GIVEN)
1291 return err;
1292 err = client_write(fd, "Usage: para_audioc [audioc_options] -- "
1293 "grab [grab_options]\nAvailable options:\n");
1294 if (err < 0)
1295 return err;
1296 err = client_write(fd, GRAB_HELP_TXT);
1297 if (err < 0)
1298 return err;
1299 close(fd);
1300 return 1;
1301 }
1302
1303 static int __noreturn com_term(int fd, __unused int argc, __unused char **argv)
1304 {
1305 close(fd);
1306 clean_exit(EXIT_SUCCESS, "terminating on user request");
1307 }
1308
1309 static int com_on(int fd, __unused int argc, __unused char **argv)
1310 {
1311 audiod_status = AUDIOD_ON;
1312 close(fd);
1313 return 1;
1314 }
1315
1316 static int com_off(int fd, __unused int argc, __unused char **argv)
1317 {
1318 audiod_status = AUDIOD_OFF;
1319 close(fd);
1320 return 1;
1321 }
1322
1323 static int com_sb(int fd, __unused int argc, __unused char **argv)
1324 {
1325 audiod_status = AUDIOD_STANDBY;
1326 close(fd);
1327 return 1;
1328 }
1329
1330 static int com_cycle(int fd, int argc, char **argv)
1331 {
1332 switch (audiod_status) {
1333 case AUDIOD_ON:
1334 return com_sb(fd, argc, argv);
1335 break;
1336 case AUDIOD_OFF:
1337 return com_on(fd, argc, argv);
1338 break;
1339 case AUDIOD_STANDBY:
1340 return com_off(fd, argc, argv);
1341 break;
1342 }
1343 close(fd);
1344 return 1;
1345 }
1346
1347 static int check_perms(struct ucred *c)
1348 {
1349 int i;
1350
1351 if (!conf.user_allow_given)
1352 return 1;
1353 for (i = 0; i < conf.user_allow_given; i++)
1354 if (c->uid == conf.user_allow_arg[i])
1355 return 1;
1356 return -E_UCRED_PERM;
1357 }
1358
1359 static int handle_connect(void)
1360 {
1361 int i, argc, ret, clifd = -1;
1362 struct ucred c;
1363 char *buf = para_malloc(MAXLINE), **argv = NULL;
1364 struct sockaddr_un unix_addr;
1365
1366 ret = para_accept(audiod_socket, &unix_addr, sizeof(struct sockaddr_un));
1367 if (ret < 0)
1368 goto out;
1369 clifd = ret;
1370 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1, &c);
1371 if (ret < 0)
1372 goto out;
1373 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c.pid, c.uid, c.gid, ret, buf);
1374 buf[ret] = '\0';
1375 ret = check_perms(&c);
1376 if (ret < 0)
1377 goto out;
1378 argc = split_args(buf, &argv, '\n');
1379 PARA_INFO_LOG("argv[0]: %s\n", argv[0]);
1380 for (i = 0; cmds[i].name; i++) {
1381 if (strcmp(cmds[i].name, argv[0]))
1382 continue;
1383 ret = cmds[i].handler(clifd, argc + 1, argv);
1384 goto out;
1385 }
1386 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1387 out:
1388 free(buf);
1389 free(argv);
1390 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1391 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1392 client_write(clifd, tmp);
1393 free(tmp);
1394 close(clifd);
1395 }
1396 return ret;
1397 }
1398
1399 static void audiod_get_socket(void)
1400 {
1401 struct sockaddr_un unix_addr;
1402
1403 if (conf.socket_given)
1404 socket_name = para_strdup(conf.socket_arg);
1405 else {
1406 char *hn = para_hostname();
1407 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1408 hn);
1409 free(hn);
1410 }
1411 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1412 if (conf.force_given)
1413 unlink(socket_name);
1414 audiod_socket = create_pf_socket(socket_name, &unix_addr,
1415 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1416 if (audiod_socket < 0) {
1417 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1418 exit(EXIT_FAILURE); /* do not unlink socket */
1419 }
1420 if (listen(audiod_socket, 5) < 0) {
1421 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1422 exit(EXIT_FAILURE); /* do not unlink socket */
1423 }
1424 add_close_on_fork_list(audiod_socket);
1425 }
1426
1427 static int open_stat_pipe(void)
1428 {
1429 int ret, fd[3] = {-1, 1, 0};
1430 char *argv[] = {BINDIR "/para_client", "stat", NULL};
1431 pid_t pid;
1432 ret = para_exec(&pid, BINDIR "/para_client", argv, fd);
1433 if (ret >= 0) {
1434 ret = fd[1];
1435 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1436 add_close_on_fork_list(ret);
1437 } else
1438 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1439 return ret;
1440 }
1441
1442 static int pre_select(fd_set *rfds, fd_set *wfds, struct timeval *tv)
1443 {
1444 int i, ret, max = -1;
1445
1446 FOR_EACH_SLOT(i) {
1447 struct slot_info *s = &slot[i];
1448 struct audio_format_info *a;
1449 struct receiver_node *rn = s->receiver_node;
1450 if (s->format < 0 || !rn)
1451 continue;
1452 a = &afi[s->format];
1453 ret = a->receiver->pre_select(rn, rfds, wfds, tv);
1454 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1455 max = MAX(max, ret);
1456 }
1457 return max;
1458
1459 }
1460 static void audiod_post_select(int select_ret, fd_set *rfds, fd_set *wfds)
1461 {
1462 int i, ret;
1463
1464 FOR_EACH_SLOT(i) {
1465 struct slot_info *s = &slot[i];
1466 struct audio_format_info *a;
1467 struct receiver_node *rn = s->receiver_node;
1468 if (s->format < 0 || !rn || rn->eof)
1469 continue;
1470 a = &afi[s->format];
1471 ret = a->receiver->post_select(rn, select_ret, rfds, wfds);
1472 if (ret <= 0) {
1473 if (ret)
1474 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1475 a->receiver->name, PARA_STRERROR(-ret), i);
1476 else
1477 PARA_INFO_LOG("eof in slot %d\n", i);
1478 rn->eof = 1;
1479 }
1480 if (ret < 0 && s->fci)
1481 s->fci->error = ret;
1482 }
1483 }
1484
1485 /* TODO: move everything before the select call to pre_select() */
1486 static void __noreturn audiod_mainloop(void)
1487 {
1488 fd_set rfds, wfds;
1489 int ret, max_fileno, sbo = 0;
1490 char status_buf[STRINGSIZE] = "";
1491 struct timeval tv;
1492 repeat:
1493 FD_ZERO(&rfds);
1494 FD_ZERO(&wfds);
1495 max_fileno = 0;
1496 if (audiod_status != AUDIOD_ON)
1497 kill_all_decoders();
1498 else if (playing)
1499 start_current_receiver();
1500 max_fileno = set_stream_fds(&wfds);
1501 /* stat pipe (read) */
1502 if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
1503 close_stat_pipe();
1504 if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
1505 stat_pipe = open_stat_pipe();
1506 sbo = 0;
1507 status_buf[0] = '\0';
1508 }
1509 if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF) {
1510 FD_SET(stat_pipe, &rfds);
1511 max_fileno = MAX(max_fileno, stat_pipe);
1512 }
1513 /* always check signal pipe */
1514 FD_SET(signal_pipe, &rfds);
1515 max_fileno = MAX(max_fileno, signal_pipe);
1516 /* local socket */
1517 if (audiod_socket < 0)
1518 audiod_get_socket(); /* doesn't return on errors */
1519 FD_SET(audiod_socket, &rfds);
1520 max_fileno = MAX(max_fileno, audiod_socket);
1521 tv.tv_sec = 0;
1522 tv.tv_usec = 200 * 1000;
1523 ret = pre_select(&rfds, &wfds, &tv);
1524 max_fileno = MAX(max_fileno, ret);
1525 ret = select(max_fileno + 1, &rfds, &wfds, NULL, &tv);
1526 if (ret < 0 && errno != EINTR)
1527 PARA_ERROR_LOG("select returned %d (%s)\n", ret,
1528 strerror(errno));
1529 if (audiod_status != AUDIOD_OFF)
1530 audiod_status_dump();
1531 if (ret < 0)
1532 goto repeat;
1533 audiod_post_select(ret, &rfds, &wfds);
1534 /* read status pipe */
1535 if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
1536 ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
1537 if (ret <= 0) {
1538 close_stat_pipe();
1539 /* avoid busy loop if server is down */
1540 while (sleep(1) > 0)
1541 ; /* try again*/
1542 } else {
1543 status_buf[ret + sbo] = '\0';
1544 sbo = for_each_line(status_buf, ret + sbo,
1545 &check_stat_line);
1546 }
1547 }
1548 slot_io(&wfds);
1549 if (FD_ISSET(audiod_socket, &rfds)) {
1550 ret = handle_connect();
1551 if (ret < 0) {
1552 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1553 }
1554 }
1555 /* signals */
1556 if (FD_ISSET(signal_pipe, &rfds)) {
1557 int sig_nr = para_next_signal();
1558 if (sig_nr > 0)
1559 handle_signal(sig_nr);
1560 }
1561 goto repeat;
1562 }
1563
1564 static void set_initial_status(void)
1565 {
1566 audiod_status = AUDIOD_ON;
1567 if (!conf.mode_given)
1568 return;
1569 if (!strcmp(conf.mode_arg, "sb")) {
1570 audiod_status = AUDIOD_STANDBY;
1571 return;
1572 }
1573 if (!strcmp(conf.mode_arg, "off")) {
1574 audiod_status = AUDIOD_OFF;
1575 return;
1576 }
1577 if (strcmp(conf.mode_arg, "on"))
1578 PARA_WARNING_LOG("%s", "invalid mode\n");
1579 }
1580
1581 int __noreturn main(int argc, char *argv[])
1582 {
1583 char *cf;
1584 int i;
1585
1586 valid_fd_012();
1587 hostname = para_hostname();
1588 cmdline_parser(argc, argv, &conf);
1589 para_drop_privileges(conf.user_arg);
1590 cf = configfile_exists();
1591 if (cf) {
1592 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1593 fprintf(stderr, "parse error in config file\n");
1594 exit(EXIT_FAILURE);
1595 }
1596 }
1597 log_welcome("para_audiod", conf.loglevel_arg);
1598 i = init_stream_io();
1599 if (i < 0) {
1600 fprintf(stderr, "init stream io error: %s\n",
1601 PARA_STRERROR(-i));
1602 exit(EXIT_FAILURE);
1603 }
1604 server_uptime(UPTIME_SET);
1605 set_initial_status();
1606 FOR_EACH_SLOT(i)
1607 clear_slot(i);
1608 stat_item_ringbuf = ringbuffer_new(RINGBUFFER_SIZE);
1609 init_grabbing();
1610 setup_signal_handling();
1611 if (conf.daemon_given)
1612 daemon_init();
1613 audiod_mainloop();
1614 }