simplify open_audiod_pipe(), remove a trailing newline which caused
[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 close_receiver(int slot_num)
452 {
453 struct slot_info *s = &slot[slot_num];
454 struct audio_format_info *a;
455 struct timeval now;
456
457 if (s->format < 0 || !s->receiver_node)
458 return;
459 a = &afi[s->format];
460 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
461 audio_formats[s->format] , slot_num);
462 a->receiver->close(s->receiver_node);
463 free(s->receiver_node);
464 s->receiver_node = NULL;
465 gettimeofday(&now, NULL);
466 tv_add(&now, &restart_delay, &a->restart_barrier); /* FIXME: Use set_restart_barrier() */
467 }
468
469 static void kill_all_decoders(void)
470 {
471 int i;
472
473 FOR_EACH_SLOT(i)
474 if (slot[i].format >= 0) {
475 PARA_INFO_LOG("stopping decoder in slot %d\n", i);
476 kill_stream_writer(i);
477 }
478 }
479
480 static void set_restart_barrier(int format, struct timeval *now)
481 {
482 struct timeval tmp;
483
484 if (now)
485 tmp = *now;
486 else
487 gettimeofday(&tmp, NULL);
488 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
489 }
490
491 static void check_sigchld(void)
492 {
493 pid_t pid;
494 int i;
495 struct timeval now;
496 gettimeofday(&now, NULL);
497
498 reap_next_child:
499 pid = para_reap_child();
500 if (pid <= 0)
501 return;
502 FOR_EACH_SLOT(i) {
503 struct slot_info *s = &slot[i];
504 long lifetime;
505 if (s->format < 0)
506 continue;
507 if (pid == s->wpid) {
508 s->wpid = -1;
509 lifetime = now.tv_sec - s->wstime.tv_sec;
510 PARA_INFO_LOG("%s stream writer in slot %d died "
511 "after %li secs\n",
512 audio_formats[s->format], i, lifetime);
513 set_restart_barrier(s->format, &now);
514 goto reap_next_child;
515 }
516 }
517 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
518 goto reap_next_child;
519 }
520
521 static int get_empty_slot(void)
522 {
523 int i;
524 struct slot_info *s;
525
526 FOR_EACH_SLOT(i) {
527 s = &slot[i];
528 if (s->format < 0) {
529 clear_slot(i);
530 return i;
531 }
532 if (s->write_fd > 0 || s->wpid > 0)
533 continue;
534 if (s->receiver_node)
535 continue;
536 if (s->fci)
537 continue;
538 clear_slot(i);
539 return i;
540 }
541 return -E_NO_MORE_SLOTS;
542 }
543
544 static int decoder_running(int format)
545 {
546 int i, ret = 0;
547 struct slot_info *s;
548
549 FOR_EACH_SLOT(i) {
550 s = &slot[i];
551 if (s->format == format && s->receiver_node)
552 ret |= 1;
553 if (s->format == format && s->wpid > 0)
554 ret |= 2;
555 }
556 return ret;
557 }
558
559 static void close_stat_pipe(void)
560 {
561 char *msg;
562 int i;
563
564 if (stat_pipe < 0)
565 return;
566 PARA_NOTICE_LOG("%s", "closing status pipe\n");
567 close(stat_pipe);
568 del_close_on_fork_list(stat_pipe);
569 stat_pipe = -1;
570 kill_all_decoders();
571 for (i = 0; i < RINGBUFFER_SIZE; i++)
572 ringbuffer_add(stat_item_ringbuf, para_strdup(NULL));
573 dump_empty_status();
574 length_seconds = 0;
575 offset_seconds = 0;
576 audiod_status_dump();
577 playing = 0;
578 msg = make_message("%s:no connection to para_server\n",
579 status_item_list[SI_STATUS_BAR]);
580 ringbuffer_add(stat_item_ringbuf, msg);
581 stat_client_write(msg);
582 free(msg);
583 }
584
585 static void __noreturn clean_exit(int status, const char *msg)
586 {
587 PARA_EMERG_LOG("%s\n", msg);
588 kill_all_decoders();
589 if (socket_name)
590 unlink(socket_name);
591 if (stat_pipe >= 0)
592 close_stat_pipe();
593 exit(status);
594 }
595
596 static char *glob_cmd(char *cmd)
597 {
598 char *ret, *replacement;
599 struct timeval tmp, delay, rss; /* real stream start */
600
601 delay.tv_sec = conf.stream_delay_arg / 1000;
602 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
603 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
604 if (sa_time_diff_sign < 0)
605 tv_add(&server_stream_start, &sa_time_diff, &rss);
606 else
607 tv_diff(&server_stream_start, &sa_time_diff, &rss);
608 tv_add(&rss, &delay, &tmp);
609 replacement = make_message("%lu:%lu", tmp.tv_sec, tmp.tv_usec);
610 ret = s_a_r(cmd, "STREAM_START", replacement);
611 free(replacement);
612 if (!ret)
613 goto out;
614 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
615 {
616 struct timeval now;
617 gettimeofday(&now, NULL);
618 PARA_INFO_LOG("now: %lu:%lu\n", now.tv_sec, now.tv_usec);
619 }
620 out:
621 return ret;
622 }
623
624 /** get the number of filters for the given audio format */
625 int num_filters(int audio_format_num)
626 {
627 return afi[audio_format_num].num_filters;
628 }
629
630 static void open_filters(int slot_num)
631 {
632 struct slot_info *s = &slot[slot_num];
633 struct audio_format_info *a = &afi[s->format];
634 int nf = a->num_filters;
635 int i;
636
637 s->fci = para_calloc(sizeof(struct filter_chain_info));
638 INIT_LIST_HEAD(&s->fci->filters);
639 if (!nf)
640 return;
641 s->fci->inbuf = s->receiver_node->buf;
642 s->fci->in_loaded = &s->receiver_node->loaded;
643 s->fci->outbuf = s->receiver_node->buf;
644 s->fci->out_loaded = &s->receiver_node->loaded;
645 s->fci->eof = &s->receiver_node->eof;
646 for (i = 0; i < nf; i++) {
647 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
648 fn->conf = a->filter_conf[i];
649 fn->fci = s->fci;
650 fn->filter = a->filters[i];
651 INIT_LIST_HEAD(&fn->callbacks);
652 list_add_tail(&fn->node, &s->fci->filters);
653 fn->filter->open(fn);
654 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
655 audio_formats[s->format], i + 1, nf,
656 fn->filter->name, slot_num);
657 s->fci->outbuf = fn->buf;
658 s->fci->out_loaded = &fn->loaded;
659 }
660 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s->fci,
661 s->fci->outbuf);
662 }
663
664 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
665 {
666 struct filter_node *fn;
667 int i, j;
668
669 FOR_EACH_SLOT(i) {
670 struct slot_info *s = &slot[i];
671 if (s->format < 0 || !s->fci)
672 continue;
673 if (slot_num >= 0 && slot_num != i)
674 continue;
675 if (format >= 0 && s->format != format)
676 continue;
677 if (num_filters(i) < filternum)
678 continue;
679 /* success */
680 j = 1;
681 list_for_each_entry(fn, &s->fci->filters, node)
682 if (filternum <= 0 || j++ == filternum)
683 break;
684 return fn;
685 }
686 return NULL;
687 }
688
689 static void start_stream_writer(int slot_num)
690 {
691 int ret, fds[3] = {1, -1, -1};
692 struct slot_info *s = &slot[slot_num];
693 struct audio_format_info *a = &afi[s->format];
694 char *glob = glob_cmd(a->write_cmd);
695
696 PARA_INFO_LOG("starting stream writer: %s\n", glob? glob : a->write_cmd);
697 open_filters(slot_num);
698
699 ret = para_exec_cmdline_pid(&s->wpid, glob? glob : a->write_cmd, fds);
700 free(glob);
701 if (ret < 0) {
702 PARA_ERROR_LOG("exec failed (%d)\n", ret);
703 return;
704 }
705 s->write_fd = fds[0];
706 add_close_on_fork_list(s->write_fd);
707 /* we write to this fd in do_select, so we need non-blocking */
708 fcntl(s->write_fd, F_SETFL, O_NONBLOCK);
709 gettimeofday(&s->wstime, NULL);
710 current_decoder = slot_num;
711 activate_inactive_grab_clients(slot_num, s->format, &s->fci->filters);
712 }
713
714 static void open_receiver(int format)
715 {
716 struct audio_format_info *a = &afi[format];
717 struct slot_info *s;
718 int ret, slot_num;
719
720 slot_num = get_empty_slot();
721 if (slot_num < 0)
722 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
723 s = &slot[slot_num];
724 s->format = format;
725 gettimeofday(&s->rtime, NULL);
726 s->wtime = s->rtime;
727 s->receiver_node = para_calloc(sizeof(struct receiver_node));
728 s->receiver_node->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 }
740
741 static int is_frozen(int format)
742 {
743 struct timeval now;
744 struct audio_format_info *a = &afi[format];
745
746 gettimeofday(&now, NULL);
747 return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
748 }
749
750 static void start_current_receiver(void)
751 {
752 int i;
753
754 if (!af_status)
755 return;
756 i = get_audio_format_num(af_status);
757 if (i < 0)
758 return;
759 if ((decoder_running(i) & 1) || is_frozen(i))
760 return;
761 open_receiver(i);
762 }
763
764 static void compute_time_diff(const struct timeval *status_time)
765 {
766 struct timeval now, tmp, diff;
767 static int count;
768 int sign;
769 const struct timeval max_deviation = {0, 500 * 1000};
770 const int time_smooth = 5;
771
772 gettimeofday(&now, NULL);
773 sign = tv_diff(status_time, &now, &diff);
774 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
775 // sign, sa_time_diff_sign);
776 if (!count) {
777 sa_time_diff_sign = sign;
778 sa_time_diff = diff;
779 count++;
780 return;
781 }
782 if (count > 5) {
783 int s = tv_diff(&diff, &sa_time_diff, &tmp);
784 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
785 PARA_WARNING_LOG("time diff jump: %lims\n",
786 s * tv2ms(&tmp));
787 }
788 count++;
789 sa_time_diff_sign = tv_convex_combination(
790 sa_time_diff_sign * time_smooth, &sa_time_diff,
791 count > 10? sign : sign * time_smooth, &diff,
792 &tmp);
793 sa_time_diff = tmp;
794 PARA_INFO_LOG("time diff (cur/avg): "
795 "%li:%lu/%li:%lu\n",
796 sign * diff.tv_sec, (diff.tv_usec + 500) / 1000,
797 sa_time_diff_sign * sa_time_diff.tv_sec,
798 (sa_time_diff.tv_usec + 500)/ 1000);
799 }
800
801 static void check_stat_line(char *line)
802 {
803 int itemnum;
804 size_t ilen = 0;
805 struct timeval tv;
806
807 if (!line)
808 return;
809 ringbuffer_add(stat_item_ringbuf, line);
810 stat_client_write(line);
811 itemnum = stat_line_valid(line);
812 if (itemnum < 0)
813 return;
814 ilen = strlen(status_item_list[itemnum]);
815 switch (itemnum) {
816 case SI_STATUS:
817 playing = strstr(line, "playing")? 1 : 0;
818 break;
819 case SI_FORMAT:
820 free(af_status);
821 af_status = para_strdup(line + ilen + 1);
822 break;
823 case SI_OFFSET:
824 offset_seconds = atoi(line + ilen + 1);
825 break;
826 case SI_LENGTH:
827 length_seconds = atoi(line + ilen + 1);
828 break;
829 case SI_STREAM_START:
830 if (sscanf(line + ilen + 1, "%lu.%lu",
831 &tv.tv_sec, &tv.tv_usec) == 2)
832 server_stream_start = tv;
833 break;
834 case SI_CURRENT_TIME:
835 if (sscanf(line + ilen + 1, "%lu.%lu", &tv.tv_sec,
836 &tv.tv_usec) == 2)
837 compute_time_diff(&tv);
838 break;
839 }
840 }
841
842 static void handle_signal(int sig)
843 {
844 switch (sig) {
845 case SIGCHLD:
846 return check_sigchld();
847 case SIGINT:
848 case SIGTERM:
849 case SIGHUP:
850 PARA_EMERG_LOG("terminating on signal %d\n", sig);
851 clean_exit(EXIT_FAILURE, "caught deadly signal");
852 return;
853 }
854 }
855
856 static void check_timeouts(void)
857 {
858 struct timeval now;
859 int slot_num, timeout = conf.stream_timeout_arg;
860
861 gettimeofday(&now, NULL);
862 FOR_EACH_SLOT(slot_num) {
863 struct slot_info *s = &slot[slot_num];
864 if (s->format < 0)
865 continue;
866 /* check read time */
867 if (s->receiver_node &&
868 now.tv_sec > s->rtime.tv_sec + timeout) {
869 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
870 audio_formats[s->format], slot_num);
871 if (s->fci)
872 s->fci->error = 42;
873 else
874 close_receiver(slot_num);
875 }
876 /* check write time */
877 if (s->wpid > 0 && !s->wkilled &&
878 now.tv_sec > s->wtime.tv_sec + timeout) {
879 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
880 audio_formats[s->format], slot_num);
881 if (s->fci)
882 s->fci->error = 42;
883 }
884 }
885 }
886
887 static size_t get_loaded_bytes(int slot_num)
888 {
889 size_t loaded = 0;
890 struct slot_info *s = &slot[slot_num];
891 struct receiver_node *rn = s->receiver_node;
892
893 if (s->format < 0)
894 goto out;
895
896 if (afi[s->format].num_filters) {
897 if (s->fci)
898 loaded = *s->fci->out_loaded;
899 } else {
900 if (rn)
901 loaded = rn->loaded;
902 }
903 out:
904 return loaded;
905 }
906
907
908 static void close_decoder_if_idle(int slot_num)
909 {
910 struct slot_info *s = &slot[slot_num];
911 struct receiver_node *rn = s->receiver_node;
912
913 if (s->format < 0)
914 return;
915 if (!s->fci)
916 return;
917 if (!rn->eof && !s->fci->error && s->wpid > 0)
918 return;
919 if (!s->fci->error && s->wpid > 0) { /* eof */
920 if (filter_io(s->fci) > 0)
921 return;
922 if (get_loaded_bytes(slot_num))
923 return;
924 }
925 if (s->write_fd > 0) {
926 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num,
927 s->write_fd);
928 close(s->write_fd);
929 del_close_on_fork_list(s->write_fd);
930 s->write_fd = -1;
931 }
932 if (s->wpid > 0)
933 return; /* wait until writer dies before closing filters */
934 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
935 slot_num, s->fci);
936 close_filters(s->fci);
937 free(s->fci);
938 close_receiver(slot_num);
939 clear_slot(slot_num);
940 }
941
942 static int set_stream_fds(fd_set *wfds)
943 {
944 int i, max_fileno = -1;
945
946 check_timeouts();
947 FOR_EACH_SLOT(i) {
948 struct slot_info *s = &slot[i];
949 struct audio_format_info *a;
950 struct receiver_node *rn;
951
952 close_decoder_if_idle(i);
953 s->wcheck = 0;
954 if (s->format < 0)
955 continue;
956 a = &afi[s->format];
957 rn = s->receiver_node;
958 if (rn && rn->loaded && !s->wpid) {
959 PARA_INFO_LOG("no writer in slot %d\n", i);
960 start_stream_writer(i);
961 }
962 if (s->write_fd <= 0)
963 continue;
964 if (!get_loaded_bytes(i))
965 continue;
966 FD_SET(s->write_fd, wfds);
967 s->wcheck = 1;
968 max_fileno = MAX(s->write_fd, max_fileno);
969 }
970 // PARA_INFO_LOG("return %d\n", max_fileno);
971 return max_fileno;
972 }
973
974 static int write_audio_data(int slot_num)
975 {
976 struct slot_info *s = &slot[slot_num];
977 struct audio_format_info *a = &afi[s->format];
978 struct receiver_node *rn = s->receiver_node;
979 int rv;
980 char **buf;
981 size_t *len;
982
983 if (a->num_filters) {
984 buf = &s->fci->outbuf;
985 len = s->fci->out_loaded;
986 } else {
987 buf = &rn->buf;
988 len = &rn->loaded;
989 }
990 PARA_DEBUG_LOG("writing %p (%d bytes)\n", *buf, *len);
991 rv = write(s->write_fd, *buf, *len);
992 PARA_DEBUG_LOG("wrote %d/%d\n", rv, *len);
993 if (rv < 0) {
994 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
995 slot_num, s->write_fd, strerror(errno));
996 *len = 0;
997 s->fci->error = E_WRITE_AUDIO_DATA;
998 } else if (rv != *len) {
999 PARA_DEBUG_LOG("partial %s write (%i/%i) for slot %d\n",
1000 audio_formats[s->format], rv, *len, slot_num);
1001 *len -= rv;
1002 memmove(*buf, *buf + rv, *len);
1003 } else
1004 *len = 0;
1005 if (rv > 0)
1006 gettimeofday(&s->wtime, NULL);
1007 return rv;
1008 }
1009
1010 static void slot_io(fd_set *wfds)
1011 {
1012 int ret, i;
1013
1014 FOR_EACH_SLOT(i) {
1015 struct slot_info *s = &slot[i];
1016 struct receiver_node *rn = s->receiver_node;
1017
1018 if (rn && rn->loaded)
1019 gettimeofday(&s->rtime, NULL);
1020 if (s->format >= 0 && s->write_fd > 0 && s->fci) {
1021 ret = filter_io(s->fci);
1022 if (ret < 0)
1023 s->fci->error = -ret;
1024 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1025 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1026 }
1027 if (s->write_fd <= 0 || !s->wcheck || !FD_ISSET(s->write_fd, wfds))
1028 continue;
1029 write_audio_data(i);
1030 }
1031 }
1032
1033 static int parse_stream_command(const char *txt, char **cmd)
1034 {
1035 char *p = strchr(txt, ':');
1036 int i;
1037
1038 if (!p)
1039 return -E_MISSING_COLON;
1040 p++;
1041 FOR_EACH_AUDIO_FORMAT(i) {
1042 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1043 continue;
1044 *cmd = p;
1045 return i;
1046 }
1047 return -E_UNSUPPORTED_AUDIO_FORMAT;
1048 }
1049
1050 static int add_filter(int format, char *cmdline)
1051 {
1052 struct audio_format_info *a = &afi[format];
1053 int filter_num, nf = a->num_filters;
1054
1055 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1056 if (filter_num < 0)
1057 return filter_num;
1058 a->filters[nf] = &filters[filter_num];
1059 a->num_filters++;
1060 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1061 a->filters[nf]->name);
1062 return filter_num;
1063 }
1064
1065 static int setup_default_filters(void)
1066 {
1067 int i, ret = 1;
1068
1069 FOR_EACH_AUDIO_FORMAT(i) {
1070 struct audio_format_info *a = &afi[i];
1071 char *tmp;
1072 int j;
1073 if (a->num_filters)
1074 continue;
1075 /* add "dec" to audio format name */
1076 tmp = make_message("%sdec", audio_formats[i]);
1077 for (j = 0; filters[j].name; j++)
1078 if (!strcmp(tmp, filters[j].name))
1079 break;
1080 free(tmp);
1081 ret = -E_UNSUPPORTED_FILTER;
1082 if (!filters[j].name)
1083 goto out;
1084 tmp = para_strdup(filters[j].name);
1085 ret = add_filter(i, tmp);
1086 free(tmp);
1087 if (ret < 0)
1088 goto out;
1089 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i], filters[j].name);
1090 ret = add_filter(i, "wav");
1091 if (ret < 0)
1092 goto out;
1093 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1094 }
1095 out:
1096 return ret;
1097 }
1098
1099 static int init_stream_io(void)
1100 {
1101 int i, ret, receiver_num;
1102 char *cmd;
1103
1104 for (i = 0; i < conf.stream_write_cmd_given; i++) {
1105 ret = parse_stream_command(conf.stream_write_cmd_arg[i], &cmd);
1106 if (ret < 0)
1107 goto out;
1108 afi[ret].write_cmd = para_strdup(cmd);
1109 PARA_INFO_LOG("%s write command: %s\n", audio_formats[ret], afi[ret].write_cmd);
1110 }
1111 for (i = 0; receivers[i].name; i++) {
1112 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1113 receivers[i].init(&receivers[i]);
1114 }
1115 for (i = 0; i < conf.receiver_given; i++) {
1116 char *arg = conf.receiver_arg[i];
1117 char *recv = strchr(arg, ':');
1118 ret = -E_MISSING_COLON;
1119 if (!recv)
1120 goto out;
1121 *recv = '\0';
1122 recv++;
1123 ret = get_audio_format_num(arg);
1124 if (ret < 0)
1125 goto out;
1126 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1127 if (!afi[ret].receiver_conf) {
1128 ret = -E_RECV_SYNTAX;
1129 goto out;
1130 }
1131 afi[ret].receiver = &receivers[receiver_num];
1132 }
1133 /* use the first available receiver with no arguments
1134 * for those audio formats for which no receiver
1135 * was specified
1136 */
1137 cmd = para_strdup(receivers[0].name);
1138 FOR_EACH_AUDIO_FORMAT(i) {
1139 struct audio_format_info *a = &afi[i];
1140 if (a->receiver_conf)
1141 continue;
1142 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1143 if (!a->receiver_conf)
1144 return -E_RECV_SYNTAX;
1145 a->receiver = &receivers[receiver_num];
1146 }
1147 free(cmd);
1148 /* filters */
1149 filter_init(filters);
1150 FOR_EACH_AUDIO_FORMAT(i) {
1151 afi[i].filter_conf = para_malloc((conf.filter_given + 1) * sizeof(char *));
1152 afi[i].filters = para_malloc((conf.filter_given + 1) * sizeof(struct filter *));
1153 }
1154 if (!conf.no_default_filters_given)
1155 return setup_default_filters();
1156 for (i = 0; i < conf.filter_given; i++) {
1157 char *arg = conf.filter_arg[i];
1158 char *filter_name = strchr(arg, ':');
1159 ret = -E_MISSING_COLON;
1160 if (!filter_name)
1161 goto out;
1162 *filter_name = '\0';
1163 filter_name++;
1164 ret = get_audio_format_num(arg);
1165 if (ret < 0)
1166 goto out;
1167 ret = add_filter(ret, filter_name);
1168 if (ret < 0)
1169 goto out;
1170 }
1171 ret = 1;
1172 out:
1173 return ret;
1174 }
1175
1176 static int dump_commands(int fd)
1177 {
1178 char *buf = para_strdup(""), *tmp = NULL;
1179 int i;
1180 ssize_t ret;
1181
1182 FOR_EACH_COMMAND(i) {
1183 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1184 cmds[i].description);
1185 free(buf);
1186 buf = tmp;
1187 }
1188 ret = client_write(fd, buf);
1189 free(buf);
1190 return ret;
1191 }
1192
1193 /*
1194 * command handlers don't close their fd on errors (ret < 0) so that
1195 * its caller can send an error message. Otherwise (ret >= 0) it's up
1196 * to each individual command to close the fd if necessary.
1197 */
1198
1199 static int com_help(int fd, int argc, char **argv)
1200 {
1201 int i, ret;
1202 char *buf;
1203 const char *dflt = "No such command. Available commands:\n";
1204
1205 if (argc < 2) {
1206 ret = dump_commands(fd);
1207 goto out;
1208 }
1209 FOR_EACH_COMMAND(i) {
1210 if (strcmp(cmds[i].name, argv[1]))
1211 continue;
1212 buf = make_message(
1213 "NAME\n\t%s -- %s\n"
1214 "SYNOPSIS\n\tpara_audioc %s\n"
1215 "DESCRIPTION\n%s\n",
1216 argv[1],
1217 cmds[i].description,
1218 cmds[i].synopsis,
1219 cmds[i].help
1220 );
1221 ret = client_write(fd, buf);
1222 free(buf);
1223 goto out;
1224 }
1225 ret = client_write(fd, dflt);
1226 if (ret > 0)
1227 ret = dump_commands(fd);
1228 out:
1229 if (ret >= 0)
1230 close(fd);
1231 return ret;
1232 }
1233
1234 static int com_stat(int fd, __unused int argc, __unused char **argv)
1235 {
1236 int i, ret;
1237 char *buf = audiod_status_string();
1238
1239 buf = para_strcat(buf, "\n");
1240 for (i = RINGBUFFER_SIZE - 1; i >= 0; i--) {
1241 char *tmp, *line = ringbuffer_get(stat_item_ringbuf, i);
1242 if (!line)
1243 continue;
1244 tmp = make_message("%s\n", line);
1245 buf = para_strcat(buf, tmp);
1246 free(tmp);
1247 }
1248 ret = client_write(fd, buf);
1249 if (ret > 0)
1250 ret = stat_client_add(fd);
1251 free(buf);
1252 return ret;
1253 }
1254
1255 #if 0
1256 static char *list_filters(void)
1257 {
1258 int i, j;
1259 char *tmp, *msg = make_message("format\tnum\tcmd\n");
1260
1261 FOR_EACH_AUDIO_FORMAT(i) {
1262 for (j = 0; j < afi[i].num_filters; j++) {
1263 tmp = make_message("%s\t%i\t%s\n",
1264 afi[i].name, j, afi[i].filter_cmds[j]);
1265 msg = para_strcat(msg, tmp);
1266 free(tmp);
1267 }
1268 tmp = make_message("%s\t%i\t%s\n", afi[i].name,
1269 j, afi[i].write_cmd);
1270 msg = para_strcat(msg, tmp);
1271 free(tmp);
1272 }
1273 return msg;
1274 }
1275 #endif
1276
1277 static int com_grab(int fd, int argc, char **argv)
1278 {
1279 struct grab_client *gc;
1280 struct filter_node *fn;
1281 int err;
1282
1283 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1284 gc = grab_client_new(fd, argc, argv, &err);
1285 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1286 if (!gc)
1287 goto err_out;
1288 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1289 if (fn)
1290 activate_grab_client(gc, fn);
1291 return 1;
1292 err_out:
1293 if (err != -E_GC_HELP_GIVEN)
1294 return err;
1295 err = client_write(fd, "Usage: para_audioc [audioc_options] -- "
1296 "grab [grab_options]\nAvailable options:\n");
1297 if (err < 0)
1298 return err;
1299 err = client_write(fd, GRAB_HELP_TXT);
1300 if (err < 0)
1301 return err;
1302 close(fd);
1303 return 1;
1304 }
1305
1306 static int __noreturn com_term(int fd, __unused int argc, __unused char **argv)
1307 {
1308 close(fd);
1309 clean_exit(EXIT_SUCCESS, "terminating on user request");
1310 }
1311
1312 static int com_on(int fd, __unused int argc, __unused char **argv)
1313 {
1314 audiod_status = AUDIOD_ON;
1315 close(fd);
1316 return 1;
1317 }
1318
1319 static int com_off(int fd, __unused int argc, __unused char **argv)
1320 {
1321 audiod_status = AUDIOD_OFF;
1322 close(fd);
1323 return 1;
1324 }
1325
1326 static int com_sb(int fd, __unused int argc, __unused char **argv)
1327 {
1328 audiod_status = AUDIOD_STANDBY;
1329 close(fd);
1330 return 1;
1331 }
1332
1333 static int com_cycle(int fd, int argc, char **argv)
1334 {
1335 switch (audiod_status) {
1336 case AUDIOD_ON:
1337 return com_sb(fd, argc, argv);
1338 break;
1339 case AUDIOD_OFF:
1340 return com_on(fd, argc, argv);
1341 break;
1342 case AUDIOD_STANDBY:
1343 return com_off(fd, argc, argv);
1344 break;
1345 }
1346 close(fd);
1347 return 1;
1348 }
1349
1350 static int check_perms(struct ucred *c)
1351 {
1352 int i;
1353
1354 if (!conf.user_allow_given)
1355 return 1;
1356 for (i = 0; i < conf.user_allow_given; i++)
1357 if (c->uid == conf.user_allow_arg[i])
1358 return 1;
1359 return -E_UCRED_PERM;
1360 }
1361
1362 static int handle_connect(void)
1363 {
1364 int i, argc, ret, clifd = -1;
1365 struct ucred c;
1366 char *buf = para_malloc(MAXLINE), **argv = NULL;
1367 struct sockaddr_un unix_addr;
1368
1369 ret = para_accept(audiod_socket, &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, &c);
1374 if (ret < 0)
1375 goto out;
1376 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c.pid, c.uid, c.gid, ret, buf);
1377 buf[ret] = '\0';
1378 ret = check_perms(&c);
1379 if (ret < 0)
1380 goto out;
1381 argc = split_args(buf, &argv, '\n');
1382 PARA_INFO_LOG("argv[0]: %s\n", argv[0]);
1383 for (i = 0; cmds[i].name; i++) {
1384 if (strcmp(cmds[i].name, argv[0]))
1385 continue;
1386 ret = cmds[i].handler(clifd, argc + 1, argv);
1387 goto out;
1388 }
1389 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1390 out:
1391 free(buf);
1392 free(argv);
1393 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1394 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1395 client_write(clifd, tmp);
1396 free(tmp);
1397 close(clifd);
1398 }
1399 return ret;
1400 }
1401
1402 static void audiod_get_socket(void)
1403 {
1404 struct sockaddr_un unix_addr;
1405
1406 if (conf.socket_given)
1407 socket_name = para_strdup(conf.socket_arg);
1408 else {
1409 char *hn = para_hostname();
1410 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1411 hn);
1412 free(hn);
1413 }
1414 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1415 if (conf.force_given)
1416 unlink(socket_name);
1417 audiod_socket = create_pf_socket(socket_name, &unix_addr,
1418 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1419 if (audiod_socket < 0) {
1420 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1421 exit(EXIT_FAILURE); /* do not unlink socket */
1422 }
1423 if (listen(audiod_socket, 5) < 0) {
1424 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1425 exit(EXIT_FAILURE); /* do not unlink socket */
1426 }
1427 add_close_on_fork_list(audiod_socket);
1428 }
1429
1430 static int open_stat_pipe(void)
1431 {
1432 int ret, fd[3] = {-1, 1, 0};
1433 char *argv[] = {BINDIR "/para_client", "stat", NULL};
1434 pid_t pid;
1435 ret = para_exec(&pid, BINDIR "/para_client", argv, fd);
1436 if (ret >= 0) {
1437 ret = fd[1];
1438 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1439 add_close_on_fork_list(ret);
1440 } else
1441 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1442 return ret;
1443 }
1444
1445 static int pre_select(fd_set *rfds, fd_set *wfds, struct timeval *tv)
1446 {
1447 int i, ret, max = -1;
1448
1449 FOR_EACH_SLOT(i) {
1450 struct slot_info *s = &slot[i];
1451 struct audio_format_info *a;
1452 struct receiver_node *rn = s->receiver_node;
1453 if (s->format < 0 || !rn)
1454 continue;
1455 a = &afi[s->format];
1456 ret = a->receiver->pre_select(rn, rfds, wfds, tv);
1457 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1458 max = MAX(max, ret);
1459 }
1460 return max;
1461
1462 }
1463 static void audiod_post_select(int select_ret, fd_set *rfds, fd_set *wfds)
1464 {
1465 int i, ret;
1466
1467 FOR_EACH_SLOT(i) {
1468 struct slot_info *s = &slot[i];
1469 struct audio_format_info *a;
1470 struct receiver_node *rn = s->receiver_node;
1471 if (s->format < 0 || !rn || rn->eof)
1472 continue;
1473 a = &afi[s->format];
1474 ret = a->receiver->post_select(rn, select_ret, rfds, wfds);
1475 if (ret <= 0) {
1476 if (ret)
1477 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1478 a->receiver->name, PARA_STRERROR(-ret), i);
1479 else
1480 PARA_INFO_LOG("eof in slot %d\n", i);
1481 rn->eof = 1;
1482 }
1483 if (ret < 0 && s->fci)
1484 s->fci->error = ret;
1485 }
1486 }
1487
1488 /* TODO: move everything before the select call to pre_select() */
1489 static void __noreturn audiod_mainloop(void)
1490 {
1491 fd_set rfds, wfds;
1492 int ret, max_fileno, sbo = 0;
1493 char status_buf[STRINGSIZE] = "";
1494 struct timeval tv;
1495 repeat:
1496 FD_ZERO(&rfds);
1497 FD_ZERO(&wfds);
1498 max_fileno = 0;
1499 if (audiod_status != AUDIOD_ON)
1500 kill_all_decoders();
1501 else if (playing)
1502 start_current_receiver();
1503 max_fileno = set_stream_fds(&wfds);
1504 /* stat pipe (read) */
1505 if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
1506 close_stat_pipe();
1507 if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
1508 stat_pipe = open_stat_pipe();
1509 sbo = 0;
1510 status_buf[0] = '\0';
1511 }
1512 if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF) {
1513 FD_SET(stat_pipe, &rfds);
1514 max_fileno = MAX(max_fileno, stat_pipe);
1515 }
1516 /* always check signal pipe */
1517 FD_SET(signal_pipe, &rfds);
1518 max_fileno = MAX(max_fileno, signal_pipe);
1519 /* local socket */
1520 if (audiod_socket < 0)
1521 audiod_get_socket(); /* doesn't return on errors */
1522 FD_SET(audiod_socket, &rfds);
1523 max_fileno = MAX(max_fileno, audiod_socket);
1524 tv.tv_sec = 0;
1525 tv.tv_usec = 200 * 1000;
1526 ret = pre_select(&rfds, &wfds, &tv);
1527 max_fileno = MAX(max_fileno, ret);
1528 ret = select(max_fileno + 1, &rfds, &wfds, NULL, &tv);
1529 if (ret < 0 && errno != EINTR)
1530 PARA_ERROR_LOG("select returned %d (%s)\n", ret,
1531 strerror(errno));
1532 if (audiod_status != AUDIOD_OFF)
1533 audiod_status_dump();
1534 if (ret < 0)
1535 goto repeat;
1536 audiod_post_select(ret, &rfds, &wfds);
1537 /* read status pipe */
1538 if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
1539 ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
1540 if (ret <= 0) {
1541 close_stat_pipe();
1542 /* avoid busy loop if server is down */
1543 while (sleep(1) > 0)
1544 ; /* try again*/
1545 } else {
1546 status_buf[ret + sbo] = '\0';
1547 sbo = for_each_line(status_buf, ret + sbo,
1548 &check_stat_line, 0);
1549 }
1550 }
1551 slot_io(&wfds);
1552 if (FD_ISSET(audiod_socket, &rfds)) {
1553 ret = handle_connect();
1554 if (ret < 0) {
1555 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1556 }
1557 }
1558 /* signals */
1559 if (FD_ISSET(signal_pipe, &rfds)) {
1560 int sig_nr = para_next_signal();
1561 if (sig_nr > 0)
1562 handle_signal(sig_nr);
1563 }
1564 goto repeat;
1565 }
1566
1567 static void set_initial_status(void)
1568 {
1569 audiod_status = AUDIOD_ON;
1570 if (!conf.mode_given)
1571 return;
1572 if (!strcmp(conf.mode_arg, "sb")) {
1573 audiod_status = AUDIOD_STANDBY;
1574 return;
1575 }
1576 if (!strcmp(conf.mode_arg, "off")) {
1577 audiod_status = AUDIOD_OFF;
1578 return;
1579 }
1580 if (strcmp(conf.mode_arg, "on"))
1581 PARA_WARNING_LOG("%s", "invalid mode\n");
1582 }
1583
1584 int __noreturn main(int argc, char *argv[])
1585 {
1586 char *cf;
1587 int i;
1588
1589 valid_fd_012();
1590 hostname = para_hostname();
1591 cmdline_parser(argc, argv, &conf);
1592 para_drop_privileges(conf.user_arg);
1593 cf = configfile_exists();
1594 if (cf) {
1595 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1596 fprintf(stderr, "parse error in config file\n");
1597 exit(EXIT_FAILURE);
1598 }
1599 }
1600 log_welcome("para_audiod", conf.loglevel_arg);
1601 i = init_stream_io();
1602 if (i < 0) {
1603 fprintf(stderr, "init stream io error: %s\n",
1604 PARA_STRERROR(-i));
1605 exit(EXIT_FAILURE);
1606 }
1607 server_uptime(UPTIME_SET);
1608 set_initial_status();
1609 FOR_EACH_SLOT(i)
1610 clear_slot(i);
1611 stat_item_ringbuf = ringbuffer_new(RINGBUFFER_SIZE);
1612 init_grabbing();
1613 setup_signal_handling();
1614 if (conf.daemon_given)
1615 daemon_init();
1616 audiod_mainloop();
1617 }