6477c5474b60d83d557bce7239a5ac31451491de
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file audiod.c the paraslash's audio daemon */
8 #include <sys/types.h>
9 #include <dirent.h>
10 #include <signal.h>
11
12 #include "para.h"
13 #include "error.h"
14 #include "audiod.cmdline.h"
15 #include "list.h"
16 #include "sched.h"
17 #include "ggo.h"
18 #include "recv.h"
19 #include "filter.h"
20 #include "grab_client.cmdline.h"
21 #include "grab_client.h"
22 #include "client.cmdline.h"
23 #include "client.h"
24 #include "audiod.h"
25 #include "net.h"
26 #include "daemon.h"
27 #include "string.h"
28 #include "fd.h"
29 #include "write.h"
30 #include "write_common.h"
31 #include "signal.h"
32
33 /** define the array of error lists needed by para_audiod */
34 INIT_AUDIOD_ERRLISTS;
35 /** define the array containing all supported audio formats */
36 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
37
38 /** Defines how audiod handles one supported audio format. */
39 struct audio_format_info {
40 /** pointer to the receiver for this audio format */
41 struct receiver *receiver;
42 /** the receiver configuration */
43 void *receiver_conf;
44 /** the number of filters that should be activated for this audio format */
45 unsigned int num_filters;
46 /** Array of filter numbers to be activated. */
47 unsigned *filter_nums;
48 /** Pointer to the array of filter configurations. */
49 void **filter_conf;
50 /** the number of filters that should be activated for this audio format */
51 unsigned int num_writers;
52 /** pointer to the array of writers to be activated */
53 struct writer **writers;
54 /** pointer to the array of writer configurations */
55 void **writer_conf;
56 /** do not start receiver/filters/writer before this time */
57 struct timeval restart_barrier;
58 };
59
60 /**
61 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
62 * be associated with a receiver/filter/writer triple. This array holds all
63 * information on the status of these slots.
64 *
65 * \sa struct slot_info
66 * */
67 struct slot_info slot[MAX_STREAM_SLOTS];
68
69
70 /** The array of status items sent by para_server. */
71 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
72
73 /**
74 * the current mode of operation of which can be changed by the on/off/cycle
75 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
76 */
77 int audiod_status = AUDIOD_ON;
78
79 /**
80 * the gengetopt args_info struct that holds information on all command line
81 * arguments
82 */
83 struct audiod_args_info conf;
84
85 static char *socket_name;
86 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
87
88 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
89
90 static struct status_task status_task_struct;
91
92 /**
93 * the task that calls the status command of para_server
94 *
95 * \sa struct status_task
96 */
97 static struct status_task *stat_task = &status_task_struct;
98 static struct timeval initial_delay_barrier;
99
100 /**
101 * the task for handling audiod commands
102 *
103 * \sa struct task, struct sched
104 */
105 struct command_task {
106 /** the local listening socket */
107 int fd;
108 /** the associated task structure */
109 struct task task;
110 };
111
112 /** iterate over all supported audio formats */
113 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
114
115 /**
116 * get the audio format number
117 * \param name the name of the audio format
118 *
119 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
120 * \a name is not a supported audio format.
121 */
122 int get_audio_format_num(char *name)
123 {
124 int i;
125
126 while (para_isspace(*name))
127 name++;
128 FOR_EACH_AUDIO_FORMAT(i)
129 if (!strcmp(name, audio_formats[i]))
130 return i;
131 return -E_UNSUPPORTED_AUDIO_FORMAT;
132 }
133
134 char *get_time_string(struct timeval *newest_stime)
135 {
136 struct timeval diff, adj_stream_start, tmp;
137 int total = 0, use_server_time = 1,
138 length_seconds = stat_task->length_seconds;
139
140 if (!stat_task->playing) {
141 if (length_seconds)
142 return NULL;
143 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
144 }
145 if (audiod_status == AUDIOD_OFF)
146 goto out;
147 if (stat_task->sa_time_diff_sign > 0)
148 tv_diff(&stat_task->server_stream_start, &stat_task->sa_time_diff,
149 &adj_stream_start);
150 else
151 tv_add(&stat_task->server_stream_start, &stat_task->sa_time_diff,
152 &adj_stream_start);
153 tmp = adj_stream_start;
154 if (newest_stime && audiod_status == AUDIOD_ON) {
155 tv_diff(newest_stime, &adj_stream_start, &diff);
156 if (tv2ms(&diff) < 5000) {
157 tmp = *newest_stime;
158 use_server_time = 0;
159 }
160 }
161 tv_diff(now, &tmp, &diff);
162 total = diff.tv_sec + stat_task->offset_seconds;
163 if (total > length_seconds)
164 total = length_seconds;
165 if (total < 0)
166 total = 0;
167 out:
168 return make_message(
169 "%s: %s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
170 status_item_list[SI_PLAY_TIME],
171 use_server_time? "~" : "",
172 total / 60,
173 total % 60,
174 (length_seconds - total) / 60,
175 (length_seconds - total) % 60,
176 length_seconds? (total * 100 + length_seconds / 2) /
177 length_seconds : 0,
178 length_seconds / 60,
179 length_seconds % 60
180 );
181 }
182
183 static int want_colors(void)
184 {
185 if (conf.color_arg == color_arg_no)
186 return 0;
187 if (conf.color_arg == color_arg_yes)
188 return 1;
189 if (conf.logfile_given)
190 return 0;
191 return isatty(STDERR_FILENO);
192 }
193
194 static void parse_config_or_die(void)
195 {
196 char *config_file;
197 struct audiod_cmdline_parser_params params = {
198 .override = 0,
199 .initialize = 0,
200 .check_required = 1,
201 .check_ambiguity = 0,
202 .print_errors = 1
203 };
204
205 if (conf.config_file_given)
206 config_file = para_strdup(conf.config_file_arg);
207 else {
208 char *home = para_homedir();
209 config_file = make_message("%s/.paraslash/audiod.conf", home);
210 free(home);
211 }
212 if (conf.config_file_given && !file_exists(config_file)) {
213 PARA_EMERG_LOG("can not read config file %s\n", config_file);
214 goto err;
215 }
216 if (audiod_cmdline_parser_config_file(config_file, &conf, &params)) {
217 PARA_EMERG_LOG("parse error in config file\n");
218 goto err;
219 }
220 free(config_file);
221 daemon_set_loglevel(conf.loglevel_arg);
222 return;
223 err:
224 free(config_file);
225 exit(EXIT_FAILURE);
226 }
227
228 static void setup_signal_handling(void)
229 {
230 sig_task->fd = para_signal_init();
231 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
232 para_install_sighandler(SIGINT);
233 para_install_sighandler(SIGTERM);
234 para_install_sighandler(SIGHUP);
235 signal(SIGPIPE, SIG_IGN);
236 }
237
238 static void clear_slot(int slot_num)
239 {
240 struct slot_info *s = &slot[slot_num];
241
242 PARA_INFO_LOG("clearing slot %d\n", slot_num);
243 memset(s, 0, sizeof(struct slot_info));
244 s->format = -1;
245 }
246
247 static void close_receiver(int slot_num)
248 {
249 struct slot_info *s = &slot[slot_num];
250 struct audio_format_info *a;
251
252 if (s->format < 0 || !s->receiver_node)
253 return;
254 a = &afi[s->format];
255 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
256 audio_formats[s->format], slot_num);
257 a->receiver->close(s->receiver_node);
258 free(s->receiver_node);
259 s->receiver_node = NULL;
260 }
261
262 static void kill_all_decoders(int error)
263 {
264 int i;
265
266 FOR_EACH_SLOT(i) {
267 struct slot_info *s = &slot[i];
268 if (s->wng && s->wng->task.error >= 0) {
269 PARA_INFO_LOG("deactivating wng in slot %d\n",
270 i);
271 s->wng->task.error = error;
272 }
273 if (s->fc && s->fc->task.error >= 0) {
274 PARA_INFO_LOG("deactivatimg filter chain in slot %d\n", i);
275 s->fc->task.error = error;
276 }
277 if (s->receiver_node && s->receiver_node->task.error >= 0) {
278 PARA_INFO_LOG("deactivating receiver_node in slot %d\n", i);
279 s->receiver_node->task.error = error;
280 }
281 }
282 }
283
284 static int get_empty_slot(void)
285 {
286 int i;
287 struct slot_info *s;
288
289 FOR_EACH_SLOT(i) {
290 s = &slot[i];
291 if (s->format < 0) {
292 clear_slot(i);
293 return i;
294 }
295 if (s->wng || s->receiver_node || s->fc)
296 continue;
297 clear_slot(i);
298 return i;
299 }
300 return -E_NO_MORE_SLOTS;
301 }
302
303 /**
304 * get the number of filters
305 *
306 * \param audio_format_num the number identifying the audio format
307 *
308 * \return the number of filters for the given audio format
309 *
310 * \sa struct filter;
311 */
312 int num_filters(int audio_format_num)
313 {
314 return afi[audio_format_num].num_filters;
315 }
316
317 static void open_filters(int slot_num)
318 {
319 struct slot_info *s = &slot[slot_num];
320 struct audio_format_info *a = &afi[s->format];
321 struct filter_node *fn;
322 int nf = a->num_filters;
323 int i;
324
325 s->fc = NULL;
326 if (!nf)
327 return;
328 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
329 s->fc = para_calloc(sizeof(struct filter_chain));
330 s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_node));
331 s->fc->inbuf = s->receiver_node->buf;
332 s->fc->in_loaded = &s->receiver_node->loaded;
333 s->fc->input_error = &s->receiver_node->task.error;
334 s->fc->task.pre_select = filter_pre_select;
335 s->fc->task.post_select = NULL;
336 s->fc->task.error = 0;
337 s->fc->num_filters = nf;
338
339 s->receiver_node->output_error = &s->fc->task.error;
340 sprintf(s->fc->task.status, "filter chain");
341 FOR_EACH_FILTER_NODE(fn, s->fc, i) {
342 struct filter *f = filters + a->filter_nums[i];
343 fn->filter_num = a->filter_nums[i];
344 fn->conf = a->filter_conf[i];
345 fn->fc = s->fc;
346 fn->loaded = 0;
347 INIT_LIST_HEAD(&fn->callbacks);
348 f->open(fn);
349 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
350 audio_formats[s->format], i, nf, f->name, slot_num);
351 s->fc->outbuf = fn->buf;
352 s->fc->out_loaded = &fn->loaded;
353 }
354 register_task(&s->fc->task);
355 }
356
357 static void open_writers(int slot_num)
358 {
359 int ret, i;
360 struct slot_info *s = &slot[slot_num];
361 struct audio_format_info *a = &afi[s->format];
362
363 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
364 if (!a->num_writers)
365 s->wng = setup_default_wng();
366 else
367 s->wng = wng_new(a->num_writers);
368 if (s->fc) {
369 s->wng->buf = s->fc->outbuf;
370 s->wng->loaded = s->fc->out_loaded;
371 s->wng->input_error = &s->fc->task.error;
372 s->wng->channels = &s->fc->channels;
373 s->wng->samplerate = &s->fc->samplerate;
374 s->fc->output_error = &s->wng->task.error;
375 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
376 } else {
377 s->wng->buf = s->receiver_node->buf;
378 s->wng->loaded = &s->receiver_node->loaded;
379 s->wng->input_error = &s->receiver_node->task.error;
380 }
381 for (i = 0; i < a->num_writers; i++) {
382 s->wng->writer_nodes[i].conf = a->writer_conf[i];
383 s->wng->writer_nodes[i].writer = a->writers[i];
384 }
385 ret = wng_open(s->wng);
386 if (ret < 0) {
387 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
388 return;
389 }
390 s->wstime = *now;
391 activate_inactive_grab_clients(slot_num, s->format, s->fc);
392 }
393
394 static int open_receiver(int format)
395 {
396 struct audio_format_info *a = &afi[format];
397 struct slot_info *s;
398 int ret, slot_num;
399 struct receiver_node *rn;
400 const struct timeval restart_delay = {2, 0};
401
402 ret = get_empty_slot();
403 if (ret < 0)
404 goto err;
405 slot_num = ret;
406 s = &slot[slot_num];
407 s->format = format;
408 s->receiver_node = para_calloc(sizeof(struct receiver_node));
409 rn = s->receiver_node;
410 rn->receiver = a->receiver;
411 rn->conf = a->receiver_conf;
412 ret = a->receiver->open(s->receiver_node);
413 if (ret < 0) {
414 free(s->receiver_node);
415 s->receiver_node = NULL;
416 goto err;
417 }
418 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
419 audio_formats[s->format], a->receiver->name, slot_num);
420 rn->task.pre_select = a->receiver->pre_select;
421 rn->task.post_select = a->receiver->post_select;
422 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
423 register_task(&rn->task);
424 ret = 1;
425 err:
426 if (ret < 0)
427 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
428 tv_add(now, &restart_delay, &afi[format].restart_barrier);
429 return ret;
430 }
431
432 static int receiver_running(int format)
433 {
434 int i;
435
436 FOR_EACH_SLOT(i) {
437 struct slot_info *s = &slot[i];
438 if (s->format == format && s->receiver_node)
439 return 1;
440 }
441 return 0;
442 }
443
444 static int open_current_receiver(struct sched *s)
445 {
446 struct timeval diff;
447 int cafn = stat_task->current_audio_format_num;
448
449 if (cafn < 0 || !stat_task->ct)
450 return 0;
451 if (receiver_running(cafn))
452 return 0;
453 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
454 s->timeout = diff;
455 return 0;
456 }
457 return open_receiver(cafn) < 0? 0 : 1;
458 }
459
460 static unsigned compute_time_diff(const struct timeval *status_time)
461 {
462 struct timeval tmp, diff;
463 static unsigned count;
464 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
465 const struct timeval max_deviation = {0, 500 * 1000};
466 const int time_smooth = 5;
467
468 if (!status_time)
469 return count;
470 sign = tv_diff(status_time, now, &diff);
471 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
472 // sign, sa_time_diff_sign);
473 if (!count) {
474 sa_time_diff_sign = sign;
475 stat_task->sa_time_diff = diff;
476 count++;
477 goto out;
478 }
479 if (count > 5) {
480 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
481 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
482 PARA_WARNING_LOG("time diff jump: %lims\n",
483 s * tv2ms(&tmp));
484 }
485 count++;
486 sa_time_diff_sign = tv_convex_combination(
487 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
488 count > 10? sign : sign * time_smooth, &diff,
489 &tmp);
490 stat_task->sa_time_diff = tmp;
491 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
492 sign > 0? "+" : "-",
493 tv2ms(&diff),
494 sa_time_diff_sign ? "+" : "-",
495 tv2ms(&stat_task->sa_time_diff)
496 );
497 out:
498 stat_task->sa_time_diff_sign = sa_time_diff_sign;
499 return count;
500 }
501
502 static int check_stat_line(char *line, __a_unused void *data)
503 {
504 int itemnum;
505 size_t ilen = 0;
506 long unsigned sec, usec;
507 char *tmp;
508
509 //PARA_INFO_LOG("line: %s\n", line);
510 if (!line)
511 return 1;
512 itemnum = stat_line_valid(line);
513 if (itemnum < 0) {
514 PARA_WARNING_LOG("invalid status line: %s\n", line);
515 return 1;
516 }
517 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
518 return 1;
519 tmp = make_message("%s\n", line);
520 stat_client_write(tmp, itemnum);
521 free(tmp);
522 free(stat_item_values[itemnum]);
523 stat_item_values[itemnum] = para_strdup(line);
524 ilen = strlen(status_item_list[itemnum]);
525 switch (itemnum) {
526 case SI_STATUS:
527 stat_task->playing = strstr(line, "playing")? 1 : 0;
528 PARA_INFO_LOG("stat task playing: %d\n", stat_task->playing);
529 break;
530 case SI_OFFSET:
531 stat_task->offset_seconds = atoi(line + ilen + 1);
532 break;
533 case SI_SECONDS_TOTAL:
534 stat_task->length_seconds = atoi(line + ilen + 1);
535 break;
536 case SI_STREAM_START:
537 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
538 struct timeval a_start, delay;
539 delay.tv_sec = conf.stream_delay_arg / 1000;
540 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
541 stat_task->server_stream_start.tv_sec = sec;
542 stat_task->server_stream_start.tv_usec = usec;
543 if (compute_time_diff(NULL) > 2) {
544 if (stat_task->sa_time_diff_sign < 0)
545 tv_add(&stat_task->server_stream_start,
546 &stat_task->sa_time_diff, &a_start);
547 else
548 tv_diff(&stat_task->server_stream_start,
549 &stat_task->sa_time_diff, &a_start);
550 tv_add(&a_start, &delay, &initial_delay_barrier);
551 }
552 }
553 break;
554 case SI_CURRENT_TIME:
555 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
556 struct timeval tv = {sec, usec};
557 compute_time_diff(&tv);
558 }
559 break;
560 case SI_FORMAT:
561 stat_task->current_audio_format_num = get_audio_format_num(
562 line + ilen + 1);
563 }
564 return 1;
565 }
566
567 static int parse_stream_command(const char *txt, char **cmd)
568 {
569 char *p = strchr(txt, ':');
570 int i;
571
572 if (!p)
573 return -E_MISSING_COLON;
574 p++;
575 FOR_EACH_AUDIO_FORMAT(i) {
576 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
577 continue;
578 *cmd = p;
579 return i;
580 }
581 return -E_UNSUPPORTED_AUDIO_FORMAT;
582 }
583
584 static int add_filter(int format, char *cmdline)
585 {
586 struct audio_format_info *a = &afi[format];
587 int filter_num, nf = a->num_filters;
588
589 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
590 if (filter_num < 0)
591 return filter_num;
592 a->filter_nums[nf] = filter_num;
593 a->num_filters++;
594 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
595 filters[filter_num].name);
596 return filter_num;
597 }
598
599 static int init_writers(void)
600 {
601 int i, ret, nw;
602 char *cmd;
603 struct audio_format_info *a;
604
605 init_supported_writers();
606 nw = PARA_MAX(1U, conf.writer_given);
607 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
608 FOR_EACH_AUDIO_FORMAT(i) {
609 a = &afi[i];
610 a->writer_conf = para_malloc(nw * sizeof(void *));
611 a->writers = para_malloc(nw * sizeof(struct writer *));
612 a->num_writers = 0;
613 }
614 for (i = 0; i < conf.writer_given; i++) {
615 void *wconf;
616 int writer_num;
617 ret = parse_stream_command(conf.writer_arg[i], &cmd);
618 if (ret < 0)
619 goto out;
620 a = &afi[ret];
621 nw = a->num_writers;
622 wconf = check_writer_arg(cmd, &writer_num);
623 if (!wconf) {
624 ret = writer_num;
625 goto out;
626 }
627 a->writers[nw] = &writers[writer_num];
628 a->writer_conf[nw] = wconf;
629 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
630 nw, writer_names[writer_num]);
631 a->num_writers++;
632 }
633 ret = 1;
634 out:
635 return ret;
636 }
637
638 static int init_receivers(void)
639 {
640 int i, ret, receiver_num;
641 char *cmd = NULL;
642 struct audio_format_info *a;
643
644 for (i = 0; receivers[i].name; i++) {
645 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
646 receivers[i].init(&receivers[i]);
647 }
648 for (i = conf.receiver_given - 1; i >= 0; i--) {
649 char *arg = conf.receiver_arg[i];
650 char *recv_arg = strchr(arg, ':');
651 ret = -E_MISSING_COLON;
652 if (!recv_arg)
653 goto out;
654 *recv_arg = '\0';
655 recv_arg++;
656 ret = get_audio_format_num(arg);
657 if (ret < 0)
658 goto out;
659 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
660 if (!afi[ret].receiver_conf) {
661 ret = -E_RECV_SYNTAX;
662 goto out;
663 }
664 afi[ret].receiver = &receivers[receiver_num];
665 }
666 /* use the first available receiver with no arguments
667 * for those audio formats for which no receiver
668 * was specified
669 */
670 cmd = para_strdup(receivers[0].name);
671 FOR_EACH_AUDIO_FORMAT(i) {
672 a = &afi[i];
673 if (a->receiver_conf)
674 continue;
675 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
676 if (!a->receiver_conf)
677 return -E_RECV_SYNTAX;
678 a->receiver = &receivers[receiver_num];
679 }
680 ret = 1;
681 out:
682 free(cmd);
683 return ret;
684 }
685
686 static int init_default_filters(void)
687 {
688 int i, ret = 1;
689
690 FOR_EACH_AUDIO_FORMAT(i) {
691 struct audio_format_info *a = &afi[i];
692 char *tmp;
693 int j;
694
695 if (a->num_filters)
696 continue; /* no default -- nothing to to */
697 /* add "dec" to audio format name */
698 tmp = make_message("%sdec", audio_formats[i]);
699 for (j = 0; filters[j].name; j++)
700 if (!strcmp(tmp, filters[j].name))
701 break;
702 free(tmp);
703 ret = -E_UNSUPPORTED_FILTER;
704 if (!filters[j].name)
705 goto out;
706 tmp = para_strdup(filters[j].name);
707 ret = add_filter(i, tmp);
708 free(tmp);
709 if (ret < 0)
710 goto out;
711 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
712 filters[j].name);
713 }
714 out:
715 return ret;
716 }
717
718 static int init_filters(void)
719 {
720 int i, ret, nf;
721
722 filter_init(filters);
723 nf = PARA_MAX(1U, conf.filter_given);
724 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
725 FOR_EACH_AUDIO_FORMAT(i) {
726 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
727 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
728 }
729 if (!conf.no_default_filters_given)
730 return init_default_filters();
731 for (i = 0; i < conf.filter_given; i++) {
732 char *arg = conf.filter_arg[i];
733 char *filter_name = strchr(arg, ':');
734 ret = -E_MISSING_COLON;
735 if (!filter_name)
736 goto out;
737 *filter_name = '\0';
738 filter_name++;
739 ret = get_audio_format_num(arg);
740 if (ret < 0)
741 goto out;
742 ret = add_filter(ret, filter_name);
743 if (ret < 0)
744 goto out;
745 }
746 ret = init_default_filters(); /* use default values for the rest */
747 out:
748 return ret;
749 }
750
751 static int init_stream_io(void)
752 {
753 int ret;
754
755 ret = init_writers();
756 if (ret < 0)
757 return ret;
758 ret = init_receivers();
759 if (ret < 0)
760 return ret;
761 ret = init_filters();
762 if (ret < 0)
763 return ret;
764 return 1;
765 }
766
767 /* does not unlink socket on errors */
768 static int audiod_get_socket(void)
769 {
770 struct sockaddr_un unix_addr;
771 int ret, fd;
772
773 if (conf.socket_given)
774 socket_name = para_strdup(conf.socket_arg);
775 else {
776 char *hn = para_hostname();
777 socket_name = make_message("/var/paraslash/audiod_socket.%s",
778 hn);
779 free(hn);
780 }
781 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
782 if (conf.force_given)
783 unlink(socket_name);
784 ret = create_local_socket(socket_name, &unix_addr,
785 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
786 if (ret < 0)
787 goto err;
788 fd = ret;
789 if (listen(fd , 5) < 0) {
790 ret = -ERRNO_TO_PARA_ERROR(errno);
791 goto err;
792 }
793 ret = mark_fd_nonblocking(fd);
794 if (ret < 0)
795 goto err;
796 return fd;
797 err:
798 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
799 exit(EXIT_FAILURE);
800 }
801
802 static void signal_pre_select(struct sched *s, struct task *t)
803 {
804 struct signal_task *st = container_of(t, struct signal_task, task);
805 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
806 }
807
808 static void signal_post_select(struct sched *s, struct task *t)
809 {
810 struct signal_task *st = container_of(t, struct signal_task, task);
811
812 if (!FD_ISSET(st->fd, &s->rfds))
813 return;
814
815 st->signum = para_next_signal();
816 switch (st->signum) {
817 case SIGINT:
818 case SIGTERM:
819 case SIGHUP:
820 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
821 clean_exit(EXIT_FAILURE, "caught deadly signal");
822 }
823 }
824
825 static void signal_setup_default(struct signal_task *st)
826 {
827 st->task.pre_select = signal_pre_select;
828 st->task.post_select = signal_post_select;
829 sprintf(st->task.status, "signal task");
830 }
831
832 static void command_pre_select(struct sched *s, struct task *t)
833 {
834 struct command_task *ct = container_of(t, struct command_task, task);
835 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
836 }
837
838 static void command_post_select(struct sched *s, struct task *t)
839 {
840 int ret;
841 struct command_task *ct = container_of(t, struct command_task, task);
842
843 audiod_status_dump();
844 if (!FD_ISSET(ct->fd, &s->rfds))
845 return;
846 ret = handle_connect(ct->fd);
847 if (ret < 0)
848 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
849 }
850
851 static void init_command_task(struct command_task *ct)
852 {
853 ct->task.pre_select = command_pre_select;
854 ct->task.post_select = command_post_select;
855 ct->task.error = 0;
856 ct->fd = audiod_get_socket(); /* doesn't return on errors */
857 sprintf(ct->task.status, "command task");
858 }
859
860 static void close_stat_pipe(void)
861 {
862 int i;
863
864 if (!stat_task->ct)
865 return;
866 client_close(stat_task->ct);
867 stat_task->ct = NULL;
868 FOR_EACH_STATUS_ITEM(i) {
869 free(stat_item_values[i]);
870 stat_item_values[i] = NULL;
871 }
872 dump_empty_status();
873 stat_task->length_seconds = 0;
874 stat_task->offset_seconds = 0;
875 audiod_status_dump();
876 stat_task->playing = 0;
877 }
878
879 /**
880 * close the connection to para_server and exit
881 *
882 * \param status the exit status which is passed to exit(3)
883 * \param msg the log message
884 *
885 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
886 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
887 * EXIT_FAILURE.
888 *
889 * \sa exit(3)
890 */
891 void __noreturn clean_exit(int status, const char *msg)
892 {
893 PARA_EMERG_LOG("%s\n", msg);
894 if (socket_name)
895 unlink(socket_name);
896 close_stat_pipe();
897 exit(status);
898 }
899
900 /* avoid busy loop if server is down */
901 static void set_stat_task_restart_barrier(unsigned seconds)
902 {
903 struct timeval delay = {seconds, 0};
904 tv_add(now, &delay, &stat_task->restart_barrier);
905 }
906
907 static void try_to_close_slot(int slot_num)
908 {
909 struct slot_info *s = &slot[slot_num];
910
911 if (s->format < 0)
912 return;
913 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
914 return;
915 if (s->fc && s->fc->task.error != -E_TASK_UNREGISTERED)
916 return;
917 if (s->wng && s->wng->task.error != -E_TASK_UNREGISTERED)
918 return;
919 PARA_INFO_LOG("closing slot %d\n", slot_num);
920 wng_close(s->wng);
921 close_filters(s->fc);
922 free(s->fc);
923 close_receiver(slot_num);
924 clear_slot(slot_num);
925 }
926
927 /*
928 * Check if any receivers/filters/writers need to be started and do so if
929 * necessary.
930 */
931 static void start_stop_decoders(struct sched *s)
932 {
933 int i;
934
935 FOR_EACH_SLOT(i)
936 try_to_close_slot(i);
937 if (audiod_status != AUDIOD_ON || !stat_task->playing)
938 return kill_all_decoders(-E_NOT_PLAYING);
939 open_current_receiver(s);
940 FOR_EACH_SLOT(i) {
941 struct slot_info *sl = &slot[i];
942 struct audio_format_info *a;
943 struct timeval diff;
944
945 if (sl->format < 0)
946 continue;
947 a = &afi[sl->format];
948 if (!sl->receiver_node)
949 continue;
950 if ((!a->num_filters || sl->fc) && sl->wng)
951 continue; /* everything already started */
952 if (!a->num_filters) {
953 if (sl->receiver_node->loaded && !sl->wng) {
954 open_writers(i);
955 }
956 continue;
957 }
958 if (sl->receiver_node->loaded && !sl->fc) {
959 open_filters(i);
960 continue;
961 }
962 if (sl->wng || !sl->fc || !*sl->fc->out_loaded)
963 continue;
964 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
965 open_writers(i);
966 continue;
967 }
968 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
969 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
970 s->timeout = diff;
971 }
972 }
973 }
974
975
976 /* restart the client task if necessary */
977 static void status_pre_select(struct sched *s, struct task *t)
978 {
979 struct status_task *st = container_of(t, struct status_task, task);
980
981 if (audiod_status == AUDIOD_OFF) {
982 if (!st->ct)
983 goto out;
984 if (st->ct->task.error >= 0) {
985 st->ct->task.error = -E_AUDIOD_OFF;
986 goto out;
987 }
988 if (st->ct->task.error != -E_TASK_UNREGISTERED)
989 goto out;
990 close_stat_pipe();
991 st->clock_diff_count = conf.clock_diff_count_arg;
992 goto out;
993 }
994 if (st->ct) {
995 unsigned bytes_left;
996 if (st->ct->task.error < 0) {
997 if (st->ct->task.error != -E_TASK_UNREGISTERED)
998 goto out;
999 close_stat_pipe();
1000 goto out;
1001 }
1002 if (st->ct->status != CL_RECEIVING)
1003 goto out;
1004 bytes_left = for_each_line(st->ct->buf, st->ct->loaded,
1005 &check_stat_line, NULL);
1006 if (st->ct->loaded != bytes_left) {
1007 st->last_status_read = *now;
1008 st->ct->loaded = bytes_left;
1009 } else {
1010 struct timeval diff;
1011 tv_diff(now, &st->last_status_read, &diff);
1012 if (diff.tv_sec > 61)
1013 st->ct->task.error = -E_STATUS_TIMEOUT;
1014 }
1015 goto out;
1016 }
1017 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1018 goto out;
1019 if (st->clock_diff_count) { /* get status only one time */
1020 char *argv[] = {"audiod", "stat", "1", NULL};
1021 int argc = 3;
1022 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1023 st->clock_diff_count--;
1024 client_open(argc, argv, &st->ct, NULL);
1025 set_stat_task_restart_barrier(2);
1026
1027 } else {
1028 char *argv[] = {"audiod", "stat", NULL};
1029 int argc = 2;
1030 client_open(argc, argv, &st->ct, NULL);
1031 set_stat_task_restart_barrier(5);
1032 }
1033 free(stat_item_values[SI_BASENAME]);
1034 stat_item_values[SI_BASENAME] = make_message(
1035 "%s: no connection to para_server\n",
1036 status_item_list[SI_BASENAME]);
1037 stat_client_write(stat_item_values[SI_BASENAME],
1038 SI_BASENAME);
1039 st->last_status_read = *now;
1040 out:
1041 start_stop_decoders(s);
1042 }
1043
1044 static void init_status_task(struct status_task *st)
1045 {
1046 memset(st, 0, sizeof(struct status_task));
1047 st->task.pre_select = status_pre_select;
1048 st->sa_time_diff_sign = 1;
1049 st->clock_diff_count = conf.clock_diff_count_arg;
1050 st->current_audio_format_num = -1;
1051 sprintf(st->task.status, "status task");
1052 }
1053
1054 static void set_initial_status(void)
1055 {
1056 audiod_status = AUDIOD_ON;
1057 if (!conf.mode_given)
1058 return;
1059 if (!strcmp(conf.mode_arg, "sb")) {
1060 audiod_status = AUDIOD_STANDBY;
1061 return;
1062 }
1063 if (!strcmp(conf.mode_arg, "off")) {
1064 audiod_status = AUDIOD_OFF;
1065 return;
1066 }
1067 if (strcmp(conf.mode_arg, "on"))
1068 PARA_WARNING_LOG("invalid mode\n");
1069 }
1070
1071 __noreturn static void print_help_and_die(void)
1072 {
1073 int d = conf.detailed_help_given;
1074 const char **p = d? audiod_args_info_detailed_help
1075 : audiod_args_info_help;
1076
1077 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1078 AUDIOD_CMDLINE_PARSER_VERSION);
1079 printf_or_die("%s\n\n", audiod_args_info_usage);
1080 for (; *p; p++)
1081 printf_or_die("%s\n", *p);
1082 print_receiver_helps(d);
1083 print_filter_helps(d);
1084 print_writer_helps(d);
1085 exit(0);
1086 }
1087
1088 static void init_colors_or_die(void)
1089 {
1090 int ret, i;
1091
1092 if (!want_colors())
1093 return;
1094 daemon_set_default_log_colors();
1095 daemon_set_flag(DF_COLOR_LOG);
1096 for (i = 0; i < conf.log_color_given; i++) {
1097 ret = daemon_set_log_color(conf.log_color_arg[i]);
1098 if (ret < 0)
1099 exit(EXIT_FAILURE);
1100 }
1101 }
1102
1103 /**
1104 * the main function of para_audiod
1105 *
1106 * \param argc usual argument count
1107 * \param argv usual argument vector
1108 *
1109 * \return EXIT_SUCCESS or EXIT_FAILURE
1110 *
1111 * \sa para_audiod(1)
1112 * */
1113 int main(int argc, char *argv[])
1114 {
1115 int ret, i;
1116 static struct sched s;
1117 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1118 struct audiod_cmdline_parser_params params = {
1119 .override = 0,
1120 .initialize = 1,
1121 .check_required = 0,
1122 .check_ambiguity = 0,
1123 .print_errors = 1
1124 };
1125
1126 valid_fd_012();
1127 audiod_cmdline_parser_ext(argc, argv, &conf, &params);
1128 HANDLE_VERSION_FLAG("audiod", conf);
1129 if (conf.help_given || conf.detailed_help_given)
1130 print_help_and_die();
1131 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1132 parse_config_or_die();
1133 daemon_set_flag(DF_LOG_TIME);
1134 daemon_set_flag(DF_LOG_HOSTNAME);
1135 daemon_set_flag(DF_LOG_LL);
1136 if (conf.logfile_given) {
1137 daemon_set_logfile(conf.logfile_arg);
1138 daemon_open_log_or_die();
1139 }
1140 init_colors_or_die();
1141 i = init_stream_io();
1142 if (i < 0) {
1143 PARA_EMERG_LOG("init stream io error: %s\n", para_strerror(-i));
1144 exit(EXIT_FAILURE);
1145 }
1146 log_welcome("para_audiod");
1147 server_uptime(UPTIME_SET);
1148 set_initial_status();
1149 FOR_EACH_SLOT(i)
1150 clear_slot(i);
1151 init_grabbing();
1152 setup_signal_handling();
1153 signal_setup_default(sig_task);
1154
1155 init_status_task(stat_task);
1156 init_command_task(cmd_task);
1157
1158 if (conf.daemon_given)
1159 daemonize();
1160
1161 register_task(&sig_task->task);
1162 register_task(&cmd_task->task);
1163 register_task(&stat_task->task);
1164 s.default_timeout.tv_sec = 0;
1165 s.default_timeout.tv_usec = 99 * 1000;
1166 ret = schedule(&s);
1167
1168 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1169 return EXIT_FAILURE;
1170 }