fix more struct timeval related warnings
[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
32 #include "error.h"
33 #include "audiod.h"
34 #include "net.h"
35 #include "daemon.h"
36 #include "string.h"
37 #include "fd.h"
38
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 static char *stat_item_values[NUM_STAT_ITEMS];
135 static FILE *logfile;
136 static const struct timeval restart_delay = {0, 300 * 1000};
137
138 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
139
140 static struct audiod_command cmds[] = {
141 {
142 .name = "cycle",
143 .handler = com_cycle,
144 .description = "switch to next mode",
145 .synopsis = "cycle",
146 .help =
147
148 "on -> standby -> off -> on\n"
149
150 },
151 {
152 .name = "grab",
153 .handler = com_grab,
154 .description = "grab the audio stream",
155 .synopsis = "-- grab [grab_options]",
156 .help =
157
158 "grab ('splice') the audio stream at any position in the filter \n"
159 "chain and send that data back to the client. Try\n"
160 "\t para_audioc -- grab -h\n"
161 "for the list of available options.\n"
162 },
163
164 {
165 .name = "help",
166 .handler = com_help,
167 .description = "display command list or help for given command",
168 .synopsis = "help [command]",
169 .help =
170
171 "When I was younger, so much younger than today, I never needed\n"
172 "anybody's help in any way. But now these days are gone, I'm not so\n"
173 "self assured. Now I find I've changed my mind and opened up the doors.\n"
174 "\n"
175 " -- Beatles: Help\n"
176
177 },
178 {
179 .name = "off",
180 .handler = com_off,
181 .description = "deactivate para_audiod",
182 .synopsis = "off",
183 .help =
184
185 "Close connection to para_server and stop all decoders.\n"
186
187 },
188 {
189 .name = "on",
190 .handler = com_on,
191 .description = "activate para_audiod",
192 .synopsis = "on",
193 .help =
194
195 "Establish connection to para_server, retrieve para_server's current\n"
196 "status. If playing, start corresponding decoder. Otherwise stop\n"
197 "all decoders.\n"
198
199 },
200 {
201 .name = "sb",
202 .handler = com_sb,
203 .description = "enter standby mode",
204 .synopsis = "sb",
205 .help =
206
207 "Stop all decoders but leave connection to para_server open.\n"
208
209 },
210 {
211 .name = "stat",
212 .handler = com_stat,
213 .description = "print status information",
214 .synopsis = "stat [item1 ...]",
215 .help =
216
217 "Dump given status items (all if none given) to stdout.\n"
218
219 },
220 {
221 .name = "term",
222 .handler = com_term,
223 .description = "terminate audiod",
224 .synopsis = "term",
225 .help =
226
227 "Stop all decoders, shut down connection to para_server and exit.\n"
228
229 },
230 {
231 .name = NULL,
232 }
233 };
234
235 /** iterate over all slots */
236 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
237 /** iterate over all supported audio formats */
238 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
239 /** iterate over the array of all audiod commands */
240 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
241
242 /**
243 * get the audio format number
244 * \param name the name of the audio format
245 *
246 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
247 * \a name is not a supported audio format.
248 */
249 int get_audio_format_num(char *name)
250 {
251 int i;
252 FOR_EACH_AUDIO_FORMAT(i)
253 if (!strcmp(name, audio_formats[i]))
254 return i;
255 return -E_UNSUPPORTED_AUDIO_FORMAT;
256 }
257
258 /*
259 * log function. first argument is loglevel.
260 */
261 void para_log(int ll, const char* fmt,...)
262 {
263 va_list argp;
264 FILE *outfd;
265 struct tm *tm;
266 time_t t1;
267 char str[MAXLINE] = "";
268
269 if (ll < conf.loglevel_arg)
270 return;
271 outfd = logfile? logfile : stderr;
272 time(&t1);
273 tm = localtime(&t1);
274 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
275 fprintf(outfd, "%s %s ", str, hostname);
276 if (conf.loglevel_arg <= INFO)
277 fprintf(outfd, "%i ", ll);
278 va_start(argp, fmt);
279 vfprintf(outfd, fmt, argp);
280 va_end(argp);
281 }
282
283 static int client_write(int fd, const char *buf)
284 {
285 size_t len = strlen(buf);
286 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
287 }
288
289 static char *get_time_string(struct timeval *newest_stime)
290 {
291 struct timeval now, diff, adj_stream_start, tmp;
292 int total = 0, use_server_time = 1;
293
294 if (!playing) {
295 if (length_seconds)
296 return NULL;
297 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
298 }
299 if (audiod_status == AUDIOD_OFF)
300 goto out;
301 if (sa_time_diff_sign > 0)
302 tv_diff(&server_stream_start, &sa_time_diff,
303 &adj_stream_start);
304 else
305 tv_add(&server_stream_start, &sa_time_diff,
306 &adj_stream_start);
307 tmp = adj_stream_start;
308 if (newest_stime && audiod_status == AUDIOD_ON) {
309 tv_diff(newest_stime, &adj_stream_start, &diff);
310 if (tv2ms(&diff) < 5000) {
311 tmp = *newest_stime;
312 use_server_time = 0;
313 }
314 }
315 gettimeofday(&now, NULL);
316 tv_diff(&now, &tmp, &diff);
317 total = diff.tv_sec + offset_seconds;
318 if (total > length_seconds)
319 total = length_seconds;
320 if (total < 0)
321 total = 0;
322 out:
323 return make_message(
324 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
325 status_item_list[SI_PLAY_TIME],
326 use_server_time? "~" : "",
327 total / 60,
328 total % 60,
329 (length_seconds - total) / 60,
330 (length_seconds - total) % 60,
331 length_seconds? (total * 100 + length_seconds / 2) /
332 length_seconds : 0,
333 length_seconds / 60,
334 length_seconds % 60
335 );
336 }
337
338 __malloc static char *audiod_status_string(void)
339 {
340 const char *status = (audiod_status == AUDIOD_ON)?
341 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
342 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
343 }
344
345 static struct timeval *wstime(void)
346 {
347 int i;
348 struct timeval *max = NULL;
349 FOR_EACH_SLOT(i) {
350 struct slot_info *s = &slot[i];
351 if (s->wpid <= 0)
352 continue;
353 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
354 continue;
355 max = &s->wstime;
356 }
357 return max;
358 }
359 __malloc static char *decoder_flags(void)
360 {
361 int i;
362 char decoder_flags[MAX_STREAM_SLOTS + 1];
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 }
375 decoder_flags[MAX_STREAM_SLOTS] = '\0';
376 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
377 decoder_flags);
378 }
379
380 static char *configfile_exists(void)
381 {
382 static char *config_file;
383
384 if (!config_file) {
385 char *home = para_homedir();
386 config_file = make_message("%s/.paraslash/audiod.conf", home);
387 free(home);
388 }
389 return file_exists(config_file)? config_file : NULL;
390 }
391
392 static void setup_signal_handling(void)
393 {
394 signal_pipe = para_signal_init();
395 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe);
396 para_install_sighandler(SIGINT);
397 para_install_sighandler(SIGTERM);
398 para_install_sighandler(SIGCHLD);
399 para_install_sighandler(SIGHUP);
400 signal(SIGPIPE, SIG_IGN);
401 }
402
403 static void audiod_status_dump(void)
404 {
405 static char *p_ts, *p_us, *p_as, *p_df;
406 struct timeval *t = wstime();
407 char *us, *tmp = get_time_string(t);
408
409 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
410 stat_client_write(tmp, SI_PLAY_TIME);
411 free(p_ts);
412 p_ts = tmp;
413
414 us = uptime_str();
415 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
416 free(us);
417 if (!p_us || strcmp(p_us, tmp))
418 stat_client_write(tmp, SI_AUDIOD_UPTIME);
419 free(p_us);
420 p_us = tmp;
421
422 tmp = audiod_status_string();
423 if (!p_as || strcmp(p_as, tmp))
424 stat_client_write(tmp, SI_AUDIOD_STATUS);
425 free(p_as);
426 p_as = tmp;
427
428 tmp = decoder_flags();
429 if (!p_df || strcmp(p_df, tmp))
430 stat_client_write(tmp, SI_DECODER_FLAGS);
431 free(p_df);
432 p_df = tmp;
433 }
434
435 static void clear_slot(int slot_num)
436 {
437 struct slot_info *s = &slot[slot_num];
438
439 PARA_INFO_LOG("clearing slot %d\n", slot_num);
440 memset(s, 0, sizeof(struct slot_info));
441 s->format = -1;
442 }
443
444 static void kill_stream_writer(int slot_num)
445 {
446 struct slot_info *s = &slot[slot_num];
447
448 if (s->format < 0 || s->wkilled || s->wpid <= 0)
449 return;
450 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
451 s->wpid, audio_formats[s->format], slot_num);
452 kill(s->wpid, SIGTERM);
453 s->wkilled = 1;
454 s->fci->error = 1;
455 }
456
457 static void set_restart_barrier(int format, struct timeval *now)
458 {
459 struct timeval tmp;
460
461 if (now)
462 tmp = *now;
463 else
464 gettimeofday(&tmp, NULL);
465 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
466 }
467
468 static void close_receiver(int slot_num)
469 {
470 struct slot_info *s = &slot[slot_num];
471 struct audio_format_info *a;
472
473 if (s->format < 0 || !s->receiver_node)
474 return;
475 a = &afi[s->format];
476 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
477 audio_formats[s->format] , slot_num);
478 a->receiver->close(s->receiver_node);
479 free(s->receiver_node);
480 s->receiver_node = NULL;
481 set_restart_barrier(s->format, NULL);
482 }
483
484 static void kill_all_decoders(void)
485 {
486 int i;
487
488 FOR_EACH_SLOT(i)
489 if (slot[i].format >= 0) {
490 PARA_INFO_LOG("stopping decoder in slot %d\n", i);
491 kill_stream_writer(i);
492 }
493 }
494
495 static void check_sigchld(void)
496 {
497 pid_t pid;
498 int i;
499 struct timeval now;
500 gettimeofday(&now, NULL);
501
502 reap_next_child:
503 pid = para_reap_child();
504 if (pid <= 0)
505 return;
506 FOR_EACH_SLOT(i) {
507 struct slot_info *s = &slot[i];
508 long lifetime;
509 if (s->format < 0)
510 continue;
511 if (pid == s->wpid) {
512 s->wpid = -1;
513 lifetime = now.tv_sec - s->wstime.tv_sec;
514 PARA_INFO_LOG("%s stream writer in slot %d died "
515 "after %li secs\n",
516 audio_formats[s->format], i, lifetime);
517 set_restart_barrier(s->format, &now);
518 goto reap_next_child;
519 }
520 }
521 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
522 goto reap_next_child;
523 }
524
525 static int get_empty_slot(void)
526 {
527 int i;
528 struct slot_info *s;
529
530 FOR_EACH_SLOT(i) {
531 s = &slot[i];
532 if (s->format < 0) {
533 clear_slot(i);
534 return i;
535 }
536 if (s->write_fd > 0 || s->wpid > 0)
537 continue;
538 if (s->receiver_node)
539 continue;
540 if (s->fci)
541 continue;
542 clear_slot(i);
543 return i;
544 }
545 return -E_NO_MORE_SLOTS;
546 }
547
548 static int decoder_running(int format)
549 {
550 int i, ret = 0;
551 struct slot_info *s;
552
553 FOR_EACH_SLOT(i) {
554 s = &slot[i];
555 if (s->format == format && s->receiver_node)
556 ret |= 1;
557 if (s->format == format && s->wpid > 0)
558 ret |= 2;
559 }
560 return ret;
561 }
562
563 static void close_stat_pipe(void)
564 {
565 int i;
566
567 if (stat_pipe < 0)
568 return;
569 PARA_NOTICE_LOG("%s", "closing status pipe\n");
570 close(stat_pipe);
571 del_close_on_fork_list(stat_pipe);
572 stat_pipe = -1;
573 kill_all_decoders();
574 for (i = 0; i < NUM_STAT_ITEMS; i++) {
575 free(stat_item_values[i]);
576 stat_item_values[i] = NULL;
577 }
578 dump_empty_status();
579 length_seconds = 0;
580 offset_seconds = 0;
581 audiod_status_dump();
582 playing = 0;
583 stat_item_values[SI_STATUS_BAR] = make_message("%s:no connection to para_server\n",
584 status_item_list[SI_STATUS_BAR]);
585 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
586 }
587
588 static void __noreturn clean_exit(int status, const char *msg)
589 {
590 PARA_EMERG_LOG("%s\n", msg);
591 kill_all_decoders();
592 if (socket_name)
593 unlink(socket_name);
594 if (stat_pipe >= 0)
595 close_stat_pipe();
596 exit(status);
597 }
598
599 __malloc static char *glob_cmd(char *cmd)
600 {
601 char *ret, *replacement;
602 struct timeval tmp, delay, rss; /* real stream start */
603
604 delay.tv_sec = conf.stream_delay_arg / 1000;
605 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
606 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
607 if (sa_time_diff_sign < 0)
608 tv_add(&server_stream_start, &sa_time_diff, &rss);
609 else
610 tv_diff(&server_stream_start, &sa_time_diff, &rss);
611 tv_add(&rss, &delay, &tmp);
612 replacement = make_message("%lu:%lu",
613 (long unsigned)tmp.tv_sec,
614 (long unsigned)tmp.tv_usec);
615 ret = s_a_r(cmd, "STREAM_START", replacement);
616 free(replacement);
617 if (!ret)
618 goto out;
619 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
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 = NULL;
695
696 if (a->write_cmd)
697 glob = glob_cmd(a->write_cmd);
698 if (!glob)
699 glob = para_strdup("para_play");
700 PARA_INFO_LOG("starting stream writer: %s\n", glob);
701 open_filters(slot_num);
702 ret = para_exec_cmdline_pid(&s->wpid, glob, fds);
703 free(glob);
704 if (ret < 0) {
705 PARA_ERROR_LOG("exec failed (%d)\n", ret);
706 return;
707 }
708 s->write_fd = fds[0];
709 add_close_on_fork_list(s->write_fd);
710 /* we write to this fd in do_select, so we need non-blocking */
711 mark_fd_nonblock(s->write_fd);
712 gettimeofday(&s->wstime, NULL);
713 current_decoder = slot_num;
714 activate_inactive_grab_clients(slot_num, s->format, &s->fci->filters);
715 }
716
717 static void open_receiver(int format)
718 {
719 struct audio_format_info *a = &afi[format];
720 struct slot_info *s;
721 int ret, slot_num;
722
723 slot_num = get_empty_slot();
724 if (slot_num < 0)
725 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
726 s = &slot[slot_num];
727 s->format = format;
728 gettimeofday(&s->rtime, NULL);
729 s->wtime = s->rtime;
730 s->receiver_node = para_calloc(sizeof(struct receiver_node));
731 s->receiver_node->conf = a->receiver_conf;
732 ret = a->receiver->open(s->receiver_node);
733 if (ret < 0) {
734 PARA_ERROR_LOG("failed to open receiver (%s)\n",
735 PARA_STRERROR(-ret));
736 free(s->receiver_node);
737 s->receiver_node = NULL;
738 return;
739 }
740 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
741 audio_formats[s->format], a->receiver->name, slot_num);
742 }
743
744 static int is_frozen(int format)
745 {
746 struct timeval now;
747 struct audio_format_info *a = &afi[format];
748
749 gettimeofday(&now, NULL);
750 return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
751 }
752
753 static void start_current_receiver(void)
754 {
755 int i;
756
757 if (!af_status)
758 return;
759 i = get_audio_format_num(af_status);
760 if (i < 0)
761 return;
762 if ((decoder_running(i) & 1) || is_frozen(i))
763 return;
764 open_receiver(i);
765 }
766
767 static void compute_time_diff(const struct timeval *status_time)
768 {
769 struct timeval now, tmp, diff;
770 static int count;
771 int sign;
772 const struct timeval max_deviation = {0, 500 * 1000};
773 const int time_smooth = 5;
774
775 gettimeofday(&now, NULL);
776 sign = tv_diff(status_time, &now, &diff);
777 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
778 // sign, sa_time_diff_sign);
779 if (!count) {
780 sa_time_diff_sign = sign;
781 sa_time_diff = diff;
782 count++;
783 return;
784 }
785 if (count > 5) {
786 int s = tv_diff(&diff, &sa_time_diff, &tmp);
787 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
788 PARA_WARNING_LOG("time diff jump: %lims\n",
789 s * tv2ms(&tmp));
790 }
791 count++;
792 sa_time_diff_sign = tv_convex_combination(
793 sa_time_diff_sign * time_smooth, &sa_time_diff,
794 count > 10? sign : sign * time_smooth, &diff,
795 &tmp);
796 sa_time_diff = tmp;
797 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
798 sign > 0? "+" : "-",
799 tv2ms(&diff),
800 sa_time_diff_sign ? "+" : "-",
801 tv2ms(&sa_time_diff)
802 );
803 }
804
805 static void check_stat_line(char *line)
806 {
807 int itemnum;
808 size_t ilen = 0;
809 struct timeval tv;
810 char *tmp;
811
812 PARA_INFO_LOG("line: %s\n", line);
813 if (!line)
814 return;
815 itemnum = stat_line_valid(line);
816 if (itemnum < 0) {
817 PARA_WARNING_LOG("invalid status line: %s\n", line);
818 return;
819 }
820 tmp = make_message("%s\n", line);
821 stat_client_write(tmp, itemnum);
822 free(tmp);
823 free(stat_item_values[itemnum]);
824 stat_item_values[itemnum] = para_strdup(line);
825 ilen = strlen(status_item_list[itemnum]);
826 switch (itemnum) {
827 case SI_STATUS:
828 playing = strstr(line, "playing")? 1 : 0;
829 break;
830 case SI_FORMAT:
831 free(af_status);
832 af_status = para_strdup(line + ilen + 1);
833 break;
834 case SI_OFFSET:
835 offset_seconds = atoi(line + ilen + 1);
836 break;
837 case SI_LENGTH:
838 length_seconds = atoi(line + ilen + 1);
839 break;
840 case SI_STREAM_START:
841 if (sscanf(line + ilen + 1, "%lu.%lu",
842 &tv.tv_sec, &tv.tv_usec) == 2)
843 server_stream_start = tv;
844 break;
845 case SI_CURRENT_TIME:
846 if (sscanf(line + ilen + 1, "%lu.%lu", &tv.tv_sec,
847 &tv.tv_usec) == 2)
848 compute_time_diff(&tv);
849 break;
850 }
851 }
852
853 static void handle_signal(int sig)
854 {
855 switch (sig) {
856 case SIGCHLD:
857 return check_sigchld();
858 case SIGINT:
859 case SIGTERM:
860 case SIGHUP:
861 PARA_EMERG_LOG("terminating on signal %d\n", sig);
862 clean_exit(EXIT_FAILURE, "caught deadly signal");
863 return;
864 }
865 }
866
867 static void check_timeouts(void)
868 {
869 struct timeval now;
870 int slot_num, timeout = conf.stream_timeout_arg;
871
872 gettimeofday(&now, NULL);
873 FOR_EACH_SLOT(slot_num) {
874 struct slot_info *s = &slot[slot_num];
875 if (s->format < 0)
876 continue;
877 /* check read time */
878 if (s->receiver_node &&
879 now.tv_sec > s->rtime.tv_sec + timeout) {
880 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
881 audio_formats[s->format], slot_num);
882 if (s->fci)
883 s->fci->error = 42;
884 else
885 close_receiver(slot_num);
886 }
887 /* check write time */
888 if (s->wpid > 0 && !s->wkilled &&
889 now.tv_sec > s->wtime.tv_sec + timeout) {
890 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
891 audio_formats[s->format], slot_num);
892 if (s->fci)
893 s->fci->error = 42;
894 }
895 }
896 }
897
898 static size_t get_loaded_bytes(int slot_num)
899 {
900 size_t loaded = 0;
901 struct slot_info *s = &slot[slot_num];
902 struct receiver_node *rn = s->receiver_node;
903
904 if (s->format < 0)
905 goto out;
906
907 if (afi[s->format].num_filters) {
908 if (s->fci)
909 loaded = *s->fci->out_loaded;
910 } else {
911 if (rn)
912 loaded = rn->loaded;
913 }
914 out:
915 return loaded;
916 }
917
918
919 static void close_decoder_if_idle(int slot_num)
920 {
921 struct slot_info *s = &slot[slot_num];
922 struct receiver_node *rn = s->receiver_node;
923
924 if (s->format < 0)
925 return;
926 if (!s->fci)
927 return;
928 if (!rn->eof && !s->fci->error && s->wpid > 0)
929 return;
930 if (!s->fci->error && s->wpid > 0) { /* eof */
931 if (filter_io(s->fci) > 0)
932 return;
933 if (get_loaded_bytes(slot_num))
934 return;
935 }
936 if (s->write_fd > 0) {
937 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num,
938 s->write_fd);
939 close(s->write_fd);
940 del_close_on_fork_list(s->write_fd);
941 s->write_fd = -1;
942 }
943 if (s->wpid > 0)
944 return; /* wait until writer dies before closing filters */
945 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
946 slot_num, s->fci);
947 close_filters(s->fci);
948 free(s->fci);
949 close_receiver(slot_num);
950 clear_slot(slot_num);
951 }
952
953 static void set_stream_fds(fd_set *wfds, int *max_fileno)
954 {
955 int i;
956
957 check_timeouts();
958 FOR_EACH_SLOT(i) {
959 struct slot_info *s = &slot[i];
960 struct audio_format_info *a;
961 struct receiver_node *rn;
962
963 close_decoder_if_idle(i);
964 s->wcheck = 0;
965 if (s->format < 0)
966 continue;
967 a = &afi[s->format];
968 rn = s->receiver_node;
969 if (rn && rn->loaded && !s->wpid) {
970 PARA_INFO_LOG("no writer in slot %d\n", i);
971 start_stream_writer(i);
972 }
973 if (s->write_fd <= 0)
974 continue;
975 if (!get_loaded_bytes(i))
976 continue;
977 para_fd_set(s->write_fd, wfds, max_fileno);
978 s->wcheck = 1;
979 }
980 }
981
982 static int write_audio_data(int slot_num)
983 {
984 struct slot_info *s = &slot[slot_num];
985 struct audio_format_info *a = &afi[s->format];
986 struct receiver_node *rn = s->receiver_node;
987 int rv;
988 char **buf;
989 size_t *len;
990
991 if (a->num_filters) {
992 buf = &s->fci->outbuf;
993 len = s->fci->out_loaded;
994 } else {
995 buf = &rn->buf;
996 len = &rn->loaded;
997 }
998 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
999 rv = write(s->write_fd, *buf, *len);
1000 PARA_DEBUG_LOG("wrote %d/%zd\n", rv, *len);
1001 if (rv < 0) {
1002 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
1003 slot_num, s->write_fd, strerror(errno));
1004 *len = 0;
1005 s->fci->error = E_WRITE_AUDIO_DATA;
1006 } else if (rv != *len) {
1007 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
1008 audio_formats[s->format], rv, *len, slot_num);
1009 *len -= rv;
1010 memmove(*buf, *buf + rv, *len);
1011 } else
1012 *len = 0;
1013 if (rv > 0)
1014 gettimeofday(&s->wtime, NULL);
1015 return rv;
1016 }
1017
1018 static void slot_io(fd_set *wfds)
1019 {
1020 int ret, i;
1021
1022 FOR_EACH_SLOT(i) {
1023 struct slot_info *s = &slot[i];
1024 struct receiver_node *rn = s->receiver_node;
1025
1026 if (rn && rn->loaded)
1027 gettimeofday(&s->rtime, NULL);
1028 if (s->format >= 0 && s->write_fd > 0 && s->fci) {
1029 ret = filter_io(s->fci);
1030 if (ret < 0)
1031 s->fci->error = -ret;
1032 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1033 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1034 }
1035 if (s->write_fd <= 0 || !s->wcheck || !FD_ISSET(s->write_fd, wfds))
1036 continue;
1037 write_audio_data(i);
1038 }
1039 }
1040
1041 static int parse_stream_command(const char *txt, char **cmd)
1042 {
1043 char *p = strchr(txt, ':');
1044 int i;
1045
1046 if (!p)
1047 return -E_MISSING_COLON;
1048 p++;
1049 FOR_EACH_AUDIO_FORMAT(i) {
1050 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1051 continue;
1052 *cmd = p;
1053 return i;
1054 }
1055 return -E_UNSUPPORTED_AUDIO_FORMAT;
1056 }
1057
1058 static int add_filter(int format, char *cmdline)
1059 {
1060 struct audio_format_info *a = &afi[format];
1061 int filter_num, nf = a->num_filters;
1062
1063 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1064 if (filter_num < 0)
1065 return filter_num;
1066 a->filters[nf] = &filters[filter_num];
1067 a->num_filters++;
1068 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1069 a->filters[nf]->name);
1070 return filter_num;
1071 }
1072
1073 static int setup_default_filters(void)
1074 {
1075 int i, ret = 1;
1076
1077 FOR_EACH_AUDIO_FORMAT(i) {
1078 struct audio_format_info *a = &afi[i];
1079 char *tmp;
1080 int j;
1081 if (a->num_filters)
1082 continue;
1083 /* add "dec" to audio format name */
1084 tmp = make_message("%sdec", audio_formats[i]);
1085 for (j = 0; filters[j].name; j++)
1086 if (!strcmp(tmp, filters[j].name))
1087 break;
1088 free(tmp);
1089 ret = -E_UNSUPPORTED_FILTER;
1090 if (!filters[j].name)
1091 goto out;
1092 tmp = para_strdup(filters[j].name);
1093 ret = add_filter(i, tmp);
1094 free(tmp);
1095 if (ret < 0)
1096 goto out;
1097 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i], filters[j].name);
1098 ret = add_filter(i, para_strdup("wav"));
1099 if (ret < 0)
1100 goto out;
1101 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1102 }
1103 out:
1104 return ret;
1105 }
1106
1107 static int init_stream_io(void)
1108 {
1109 int i, ret, receiver_num, nf;
1110 char *cmd;
1111
1112 for (i = 0; i < conf.stream_write_cmd_given; i++) {
1113 ret = parse_stream_command(conf.stream_write_cmd_arg[i], &cmd);
1114 if (ret < 0)
1115 goto out;
1116 afi[ret].write_cmd = para_strdup(cmd);
1117 PARA_INFO_LOG("%s write command: %s\n", audio_formats[ret], afi[ret].write_cmd);
1118 }
1119 for (i = 0; receivers[i].name; i++) {
1120 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1121 receivers[i].init(&receivers[i]);
1122 }
1123 for (i = 0; i < conf.receiver_given; i++) {
1124 char *arg = conf.receiver_arg[i];
1125 char *recv = strchr(arg, ':');
1126 ret = -E_MISSING_COLON;
1127 if (!recv)
1128 goto out;
1129 *recv = '\0';
1130 recv++;
1131 ret = get_audio_format_num(arg);
1132 if (ret < 0)
1133 goto out;
1134 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1135 if (!afi[ret].receiver_conf) {
1136 ret = -E_RECV_SYNTAX;
1137 goto out;
1138 }
1139 afi[ret].receiver = &receivers[receiver_num];
1140 }
1141 /* use the first available receiver with no arguments
1142 * for those audio formats for which no receiver
1143 * was specified
1144 */
1145 cmd = para_strdup(receivers[0].name);
1146 FOR_EACH_AUDIO_FORMAT(i) {
1147 struct audio_format_info *a = &afi[i];
1148 if (a->receiver_conf)
1149 continue;
1150 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1151 if (!a->receiver_conf)
1152 return -E_RECV_SYNTAX;
1153 a->receiver = &receivers[receiver_num];
1154 }
1155 free(cmd);
1156 /* filters */
1157 filter_init(filters);
1158 nf = PARA_MAX(2, conf.filter_given) + 1;
1159 PARA_INFO_LOG("allocating space for %d filters\n", nf);
1160 FOR_EACH_AUDIO_FORMAT(i) {
1161 afi[i].filter_conf = para_malloc(nf * sizeof(char *));
1162 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1163 }
1164 if (!conf.no_default_filters_given)
1165 return setup_default_filters();
1166 for (i = 0; i < conf.filter_given; i++) {
1167 char *arg = conf.filter_arg[i];
1168 char *filter_name = strchr(arg, ':');
1169 ret = -E_MISSING_COLON;
1170 if (!filter_name)
1171 goto out;
1172 *filter_name = '\0';
1173 filter_name++;
1174 ret = get_audio_format_num(arg);
1175 if (ret < 0)
1176 goto out;
1177 ret = add_filter(ret, filter_name);
1178 if (ret < 0)
1179 goto out;
1180 }
1181 ret = 1;
1182 out:
1183 return ret;
1184 }
1185
1186 static int dump_commands(int fd)
1187 {
1188 char *buf = para_strdup(""), *tmp = NULL;
1189 int i;
1190 ssize_t ret;
1191
1192 FOR_EACH_COMMAND(i) {
1193 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1194 cmds[i].description);
1195 free(buf);
1196 buf = tmp;
1197 }
1198 ret = client_write(fd, buf);
1199 free(buf);
1200 return ret;
1201 }
1202
1203 /*
1204 * command handlers don't close their fd on errors (ret < 0) so that
1205 * its caller can send an error message. Otherwise (ret >= 0) it's up
1206 * to each individual command to close the fd if necessary.
1207 */
1208
1209 static int com_help(int fd, int argc, char **argv)
1210 {
1211 int i, ret;
1212 char *buf;
1213 const char *dflt = "No such command. Available commands:\n";
1214
1215 if (argc < 2) {
1216 ret = dump_commands(fd);
1217 goto out;
1218 }
1219 FOR_EACH_COMMAND(i) {
1220 if (strcmp(cmds[i].name, argv[1]))
1221 continue;
1222 buf = make_message(
1223 "NAME\n\t%s -- %s\n"
1224 "SYNOPSIS\n\tpara_audioc %s\n"
1225 "DESCRIPTION\n%s\n",
1226 argv[1],
1227 cmds[i].description,
1228 cmds[i].synopsis,
1229 cmds[i].help
1230 );
1231 ret = client_write(fd, buf);
1232 free(buf);
1233 goto out;
1234 }
1235 ret = client_write(fd, dflt);
1236 if (ret > 0)
1237 ret = dump_commands(fd);
1238 out:
1239 if (ret >= 0)
1240 close(fd);
1241 return ret;
1242 }
1243
1244 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1245 {
1246 int i, ret;
1247 char *buf = NULL;
1248 long unsigned mask = ~0LU;
1249
1250 if (argc > 1) {
1251 mask = 0;
1252 for (i = 1; i < argc; i++) {
1253 ret = stat_item_valid(argv[i]);
1254 if (ret < 0)
1255 return ret;
1256 mask |= (1 << ret);
1257 }
1258 }
1259 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1260 if (mask & (1 << SI_PLAY_TIME)) {
1261 struct timeval *t = wstime();
1262 char *ts = get_time_string(t);
1263 if (ts) {
1264 ret = client_write(fd, ts);
1265 if (ret < 0)
1266 goto out;
1267 free(ts);
1268 }
1269 }
1270 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1271 char *tmp, *us = uptime_str();
1272 tmp = make_message("%s:%s\n",
1273 status_item_list[SI_AUDIOD_UPTIME], us);
1274 free(us);
1275 ret = client_write(fd, tmp);
1276 if (ret < 0)
1277 goto out;
1278 free(tmp);
1279 }
1280 if (mask & (1 << SI_AUDIOD_STATUS)) {
1281 char *s = audiod_status_string();
1282 ret = client_write(fd, s);
1283 if (ret < 0)
1284 goto out;
1285 free(s);
1286 }
1287 if (mask & (1 << SI_DECODER_FLAGS)) {
1288 char *df =decoder_flags();
1289 ret = client_write(fd, df);
1290 if (ret < 0)
1291 goto out;
1292 free(df);
1293 }
1294
1295 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1296 char *tmp, *v;
1297 if (!((1 << i) & mask))
1298 continue;
1299 v = stat_item_values[i];
1300 tmp = make_message("%s%s%s", buf? buf: "",
1301 v? v : "", v? "\n" : "");
1302 free(buf);
1303 buf = tmp;
1304 }
1305 ret = client_write(fd, buf);
1306 out:
1307 if (ret > 0)
1308 ret = stat_client_add(fd, mask);
1309 free(buf);
1310 return ret;
1311 }
1312
1313 #if 0
1314 static char *list_filters(void)
1315 {
1316 int i, j;
1317 char *tmp, *msg = make_message("format\tnum\tcmd\n");
1318
1319 FOR_EACH_AUDIO_FORMAT(i) {
1320 for (j = 0; j < afi[i].num_filters; j++) {
1321 tmp = make_message("%s\t%i\t%s\n",
1322 afi[i].name, j, afi[i].filter_cmds[j]);
1323 msg = para_strcat(msg, tmp);
1324 free(tmp);
1325 }
1326 tmp = make_message("%s\t%i\t%s\n", afi[i].name,
1327 j, afi[i].write_cmd);
1328 msg = para_strcat(msg, tmp);
1329 free(tmp);
1330 }
1331 return msg;
1332 }
1333 #endif
1334
1335 static int com_grab(int fd, int argc, char **argv)
1336 {
1337 struct grab_client *gc;
1338 struct filter_node *fn;
1339 int i, err;
1340 char *msg;
1341
1342 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1343 gc = grab_client_new(fd, argc, argv, &err);
1344 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1345 if (!gc)
1346 goto err_out;
1347 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1348 if (fn)
1349 activate_grab_client(gc, fn);
1350 return 1;
1351 err_out:
1352 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1353 return err;
1354 if (err == -E_GC_HELP_GIVEN) {
1355 msg = make_message("%s\n\n", grab_client_args_info_usage);
1356 for (i = 0; grab_client_args_info_help[i]; i++) {
1357 char *tmp = make_message("%s%s\n", msg,
1358 grab_client_args_info_help[i]);
1359 free(msg);
1360 msg = tmp;
1361 }
1362 } else
1363 msg = make_message("%s %s\n",
1364 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1365 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1366 err = client_write(fd, msg);
1367 free(msg);
1368 if (err < 0)
1369 return err;
1370 close(fd);
1371 return 1;
1372 }
1373
1374 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1375 {
1376 close(fd);
1377 clean_exit(EXIT_SUCCESS, "terminating on user request");
1378 }
1379
1380 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1381 {
1382 audiod_status = AUDIOD_ON;
1383 close(fd);
1384 return 1;
1385 }
1386
1387 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1388 {
1389 audiod_status = AUDIOD_OFF;
1390 close(fd);
1391 return 1;
1392 }
1393
1394 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1395 {
1396 audiod_status = AUDIOD_STANDBY;
1397 close(fd);
1398 return 1;
1399 }
1400
1401 static int com_cycle(int fd, int argc, char **argv)
1402 {
1403 switch (audiod_status) {
1404 case AUDIOD_ON:
1405 return com_sb(fd, argc, argv);
1406 break;
1407 case AUDIOD_OFF:
1408 return com_on(fd, argc, argv);
1409 break;
1410 case AUDIOD_STANDBY:
1411 return com_off(fd, argc, argv);
1412 break;
1413 }
1414 close(fd);
1415 return 1;
1416 }
1417
1418 static int check_perms(uid_t uid)
1419 {
1420 int i;
1421
1422 if (!conf.user_allow_given)
1423 return 1;
1424 for (i = 0; i < conf.user_allow_given; i++)
1425 if (uid == conf.user_allow_arg[i])
1426 return 1;
1427 return -E_UCRED_PERM;
1428 }
1429
1430 static int handle_connect(void)
1431 {
1432 int i, argc, ret, clifd = -1;
1433 char *buf = para_malloc(MAXLINE), **argv = NULL;
1434 struct sockaddr_un unix_addr;
1435
1436 ret = para_accept(audiod_socket, &unix_addr, sizeof(struct sockaddr_un));
1437 if (ret < 0)
1438 goto out;
1439 clifd = ret;
1440 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1441 if (ret < 0)
1442 goto out;
1443 PARA_INFO_LOG("connection from user %i\n", ret);
1444 ret = check_perms(ret);
1445 if (ret < 0)
1446 goto out;
1447 argc = split_args(buf, &argv, "\n");
1448 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1449 for (i = 0; cmds[i].name; i++) {
1450 if (strcmp(cmds[i].name, argv[0]))
1451 continue;
1452 ret = cmds[i].handler(clifd, argc, argv);
1453 goto out;
1454 }
1455 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1456 out:
1457 free(buf);
1458 free(argv);
1459 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1460 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1461 client_write(clifd, tmp);
1462 free(tmp);
1463 close(clifd);
1464 }
1465 return ret;
1466 }
1467
1468 static void audiod_get_socket(void)
1469 {
1470 struct sockaddr_un unix_addr;
1471
1472 if (conf.socket_given)
1473 socket_name = para_strdup(conf.socket_arg);
1474 else {
1475 char *hn = para_hostname();
1476 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1477 hn);
1478 free(hn);
1479 }
1480 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1481 if (conf.force_given)
1482 unlink(socket_name);
1483 audiod_socket = create_pf_socket(socket_name, &unix_addr,
1484 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1485 if (audiod_socket < 0) {
1486 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1487 exit(EXIT_FAILURE); /* do not unlink socket */
1488 }
1489 if (listen(audiod_socket, 5) < 0) {
1490 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1491 exit(EXIT_FAILURE); /* do not unlink socket */
1492 }
1493 add_close_on_fork_list(audiod_socket);
1494 }
1495
1496 static int open_stat_pipe(void)
1497 {
1498 int ret, fd[3] = {-1, 1, 0};
1499 pid_t pid;
1500 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1501 if (ret >= 0) {
1502 ret = fd[1];
1503 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1504 add_close_on_fork_list(ret);
1505 } else
1506 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1507 return ret;
1508 }
1509
1510 static void audiod_pre_select(fd_set *rfds, fd_set *wfds, struct timeval *tv,
1511 int *max_fileno)
1512 {
1513 int i, ret;
1514
1515 FOR_EACH_SLOT(i) {
1516 struct slot_info *s = &slot[i];
1517 struct audio_format_info *a;
1518 struct receiver_node *rn = s->receiver_node;
1519 if (s->format < 0 || !rn)
1520 continue;
1521 a = &afi[s->format];
1522 ret = a->receiver->pre_select(rn, rfds, wfds, tv);
1523 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1524 *max_fileno = PARA_MAX(*max_fileno, ret);
1525 }
1526 }
1527 static void audiod_post_select(int select_ret, fd_set *rfds, fd_set *wfds)
1528 {
1529 int i, ret;
1530
1531 FOR_EACH_SLOT(i) {
1532 struct slot_info *s = &slot[i];
1533 struct audio_format_info *a;
1534 struct receiver_node *rn = s->receiver_node;
1535 if (s->format < 0 || !rn || rn->eof)
1536 continue;
1537 a = &afi[s->format];
1538 ret = a->receiver->post_select(rn, select_ret, rfds, wfds);
1539 if (ret <= 0) {
1540 if (ret)
1541 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1542 a->receiver->name, PARA_STRERROR(-ret), i);
1543 else
1544 PARA_INFO_LOG("eof in slot %d\n", i);
1545 rn->eof = 1;
1546 }
1547 if (ret < 0 && s->fci)
1548 s->fci->error = ret;
1549 }
1550 }
1551
1552 /* TODO: move everything before the select call to pre_select() */
1553 static void __noreturn audiod_mainloop(void)
1554 {
1555 fd_set rfds, wfds;
1556 int ret, max_fileno, sbo = 0;
1557 char status_buf[STRINGSIZE] = "";
1558 struct timeval tv;
1559 repeat:
1560 FD_ZERO(&wfds);
1561 FD_ZERO(&rfds);
1562 /* always check signal pipe and the local socket */
1563 FD_SET(signal_pipe, &rfds);
1564 max_fileno = signal_pipe;
1565 para_fd_set(audiod_socket, &rfds, &max_fileno);
1566
1567 if (audiod_status != AUDIOD_ON)
1568 kill_all_decoders();
1569 else if (playing)
1570 start_current_receiver();
1571
1572 set_stream_fds(&wfds, &max_fileno);
1573 /* status pipe */
1574 if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
1575 close_stat_pipe();
1576 if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
1577 stat_pipe = open_stat_pipe();
1578 sbo = 0;
1579 status_buf[0] = '\0';
1580 }
1581 if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF)
1582 para_fd_set(stat_pipe, &rfds, &max_fileno);
1583 /* local socket */
1584 tv.tv_sec = 0;
1585 tv.tv_usec = 200 * 1000;
1586 audiod_pre_select(&rfds, &wfds, &tv, &max_fileno);
1587 ret = para_select(max_fileno + 1, &rfds, &wfds, &tv);
1588 if (ret < 0)
1589 goto repeat;
1590 if (audiod_status != AUDIOD_OFF)
1591 audiod_status_dump();
1592 audiod_post_select(ret, &rfds, &wfds);
1593 /* read status pipe */
1594 if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
1595 ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
1596 if (ret <= 0) {
1597 close_stat_pipe();
1598 /* avoid busy loop if server is down */
1599 while (sleep(1) > 0)
1600 ; /* try again*/
1601 } else {
1602 status_buf[ret + sbo] = '\0';
1603 sbo = for_each_line(status_buf, ret + sbo,
1604 &check_stat_line);
1605 }
1606 }
1607 slot_io(&wfds);
1608 if (FD_ISSET(audiod_socket, &rfds)) {
1609 ret = handle_connect();
1610 if (ret < 0) {
1611 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1612 }
1613 }
1614 /* signals */
1615 if (FD_ISSET(signal_pipe, &rfds)) {
1616 int sig_nr = para_next_signal();
1617 if (sig_nr > 0)
1618 handle_signal(sig_nr);
1619 }
1620 goto repeat;
1621 }
1622
1623 static void set_initial_status(void)
1624 {
1625 audiod_status = AUDIOD_ON;
1626 if (!conf.mode_given)
1627 return;
1628 if (!strcmp(conf.mode_arg, "sb")) {
1629 audiod_status = AUDIOD_STANDBY;
1630 return;
1631 }
1632 if (!strcmp(conf.mode_arg, "off")) {
1633 audiod_status = AUDIOD_OFF;
1634 return;
1635 }
1636 if (strcmp(conf.mode_arg, "on"))
1637 PARA_WARNING_LOG("%s", "invalid mode\n");
1638 }
1639
1640 int __noreturn main(int argc, char *argv[])
1641 {
1642 char *cf;
1643 int i;
1644
1645 fprintf(stderr, "argc: %d\n", argc);
1646 valid_fd_012();
1647 hostname = para_hostname();
1648 cmdline_parser(argc, argv, &conf);
1649 para_drop_privileges(conf.user_arg, conf.group_arg);
1650 cf = configfile_exists();
1651 if (cf) {
1652 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1653 PARA_EMERG_LOG("%s", "parse error in config file\n");
1654 exit(EXIT_FAILURE);
1655 }
1656 }
1657 if (conf.logfile_given)
1658 logfile = open_log(conf.logfile_arg);
1659 log_welcome("para_audiod", conf.loglevel_arg);
1660 i = init_stream_io();
1661 if (i < 0) {
1662 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1663 exit(EXIT_FAILURE);
1664 }
1665 server_uptime(UPTIME_SET);
1666 set_initial_status();
1667 FOR_EACH_SLOT(i)
1668 clear_slot(i);
1669 init_grabbing();
1670 setup_signal_handling();
1671 if (conf.daemon_given)
1672 daemon_init();
1673 audiod_get_socket(); /* doesn't return on errors */
1674 audiod_mainloop();
1675 }