audiod: Change return value of open_current_receiver() to void.
[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 task for obtaining para_server's status (para_client stat).
71 *
72 * \sa struct task, struct sched.
73 */
74 struct status_task {
75 /** The associated task structure of audiod. */
76 struct task task;
77 /** Client data associated with the stat task. */
78 struct client_task *ct;
79 /** Do not restart client command until this time. */
80 struct timeval restart_barrier;
81 /** Last time we received status data from para_server. */
82 struct timeval last_status_read;
83 /** The offset value announced by para_server. */
84 int offset_seconds;
85 /** The length of the current audio file as announced by para_server. */
86 int length_seconds;
87 /** The start of the current stream from the view of para_server. */
88 struct timeval server_stream_start;
89 /** The average time deviation between para_server and para_audiod. */
90 struct timeval sa_time_diff;
91 /** Whether client time is ahead of server time. */
92 int sa_time_diff_sign;
93 /** Non-zero if para_server's status is "playing". */
94 int playing;
95 /** Number of times the clock difference is to be checked. */
96 unsigned clock_diff_count;
97 /** When to start the next check for clock difference. */
98 struct timeval clock_diff_barrier;
99 /** Number of the audio format as announced by para_server. */
100 int current_audio_format_num;
101 };
102
103 /** The array of status items sent by para_server. */
104 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
105
106 /**
107 * the current mode of operation of which can be changed by the on/off/cycle
108 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
109 */
110 int audiod_status = AUDIOD_ON;
111
112 /**
113 * the gengetopt args_info struct that holds information on all command line
114 * arguments
115 */
116 struct audiod_args_info conf;
117
118 static char *socket_name;
119 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
120
121 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
122
123 static struct status_task status_task_struct;
124
125 /**
126 * the task that calls the status command of para_server
127 *
128 * \sa struct status_task
129 */
130 static struct status_task *stat_task = &status_task_struct;
131 static struct timeval initial_delay_barrier;
132
133 /**
134 * the task for handling audiod commands
135 *
136 * \sa struct task, struct sched
137 */
138 struct command_task {
139 /** the local listening socket */
140 int fd;
141 /** the associated task structure */
142 struct task task;
143 };
144
145 /** iterate over all supported audio formats */
146 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
147
148 /**
149 * get the audio format number
150 * \param name the name of the audio format
151 *
152 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
153 * \a name is not a supported audio format.
154 */
155 int get_audio_format_num(char *name)
156 {
157 int i;
158
159 while (para_isspace(*name))
160 name++;
161 FOR_EACH_AUDIO_FORMAT(i)
162 if (!strcmp(name, audio_formats[i]))
163 return i;
164 return -E_UNSUPPORTED_AUDIO_FORMAT;
165 }
166
167 char *get_time_string(struct timeval *newest_stime)
168 {
169 struct timeval diff, adj_stream_start, tmp;
170 int total = 0, use_server_time = 1,
171 length_seconds = stat_task->length_seconds;
172
173 if (!stat_task->playing) {
174 if (length_seconds)
175 return NULL;
176 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
177 }
178 if (audiod_status == AUDIOD_OFF)
179 goto out;
180 if (stat_task->sa_time_diff_sign > 0)
181 tv_diff(&stat_task->server_stream_start, &stat_task->sa_time_diff,
182 &adj_stream_start);
183 else
184 tv_add(&stat_task->server_stream_start, &stat_task->sa_time_diff,
185 &adj_stream_start);
186 tmp = adj_stream_start;
187 if (newest_stime && audiod_status == AUDIOD_ON) {
188 tv_diff(newest_stime, &adj_stream_start, &diff);
189 if (tv2ms(&diff) < 5000) {
190 tmp = *newest_stime;
191 use_server_time = 0;
192 }
193 }
194 tv_diff(now, &tmp, &diff);
195 total = diff.tv_sec + stat_task->offset_seconds;
196 if (total > length_seconds)
197 total = length_seconds;
198 if (total < 0)
199 total = 0;
200 out:
201 return make_message(
202 "%s: %s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
203 status_item_list[SI_PLAY_TIME],
204 use_server_time? "~" : "",
205 total / 60,
206 total % 60,
207 (length_seconds - total) / 60,
208 (length_seconds - total) % 60,
209 length_seconds? (total * 100 + length_seconds / 2) /
210 length_seconds : 0,
211 length_seconds / 60,
212 length_seconds % 60
213 );
214 }
215
216 static int want_colors(void)
217 {
218 if (conf.color_arg == color_arg_no)
219 return 0;
220 if (conf.color_arg == color_arg_yes)
221 return 1;
222 if (conf.logfile_given)
223 return 0;
224 return isatty(STDERR_FILENO);
225 }
226
227 static void parse_config_or_die(void)
228 {
229 int ret;
230 char *config_file;
231 struct audiod_cmdline_parser_params params = {
232 .override = 0,
233 .initialize = 0,
234 .check_required = 1,
235 .check_ambiguity = 0,
236 .print_errors = 1
237 };
238
239 if (conf.config_file_given)
240 config_file = para_strdup(conf.config_file_arg);
241 else {
242 char *home = para_homedir();
243 config_file = make_message("%s/.paraslash/audiod.conf", home);
244 free(home);
245 }
246 ret = file_exists(config_file);
247 if (conf.config_file_given && !ret) {
248 PARA_EMERG_LOG("can not read config file %s\n", config_file);
249 goto err;
250 }
251 if (ret)
252 audiod_cmdline_parser_config_file(config_file, &conf, &params);
253 free(config_file);
254 daemon_set_loglevel(conf.loglevel_arg);
255 return;
256 err:
257 free(config_file);
258 exit(EXIT_FAILURE);
259 }
260
261 static void setup_signal_handling(void)
262 {
263 sig_task->fd = para_signal_init();
264 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
265 para_install_sighandler(SIGINT);
266 para_install_sighandler(SIGTERM);
267 para_install_sighandler(SIGHUP);
268 signal(SIGPIPE, SIG_IGN);
269 }
270
271 static void clear_slot(int slot_num)
272 {
273 struct slot_info *s = &slot[slot_num];
274
275 PARA_INFO_LOG("clearing slot %d\n", slot_num);
276 memset(s, 0, sizeof(struct slot_info));
277 s->format = -1;
278 }
279
280 static void close_receiver(int slot_num)
281 {
282 struct slot_info *s = &slot[slot_num];
283 struct audio_format_info *a;
284
285 if (s->format < 0 || !s->receiver_node)
286 return;
287 a = &afi[s->format];
288 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
289 audio_formats[s->format], slot_num);
290 a->receiver->close(s->receiver_node);
291 free(s->receiver_node);
292 s->receiver_node = NULL;
293 }
294
295 static void kill_all_decoders(int error)
296 {
297 int i;
298
299 FOR_EACH_SLOT(i) {
300 struct slot_info *s = &slot[i];
301 if (s->wng && s->wng->task.error >= 0) {
302 PARA_INFO_LOG("deactivating wng in slot %d\n",
303 i);
304 s->wng->task.error = error;
305 }
306 if (s->fc && s->fc->task.error >= 0) {
307 PARA_INFO_LOG("deactivatimg filter chain in slot %d\n", i);
308 s->fc->task.error = error;
309 }
310 if (s->receiver_node && s->receiver_node->task.error >= 0) {
311 PARA_INFO_LOG("deactivating receiver_node in slot %d\n", i);
312 s->receiver_node->task.error = error;
313 }
314 }
315 }
316
317 static int get_empty_slot(void)
318 {
319 int i;
320 struct slot_info *s;
321
322 FOR_EACH_SLOT(i) {
323 s = &slot[i];
324 if (s->format < 0) {
325 clear_slot(i);
326 return i;
327 }
328 if (s->wng || s->receiver_node || s->fc)
329 continue;
330 clear_slot(i);
331 return i;
332 }
333 return -E_NO_MORE_SLOTS;
334 }
335
336 /**
337 * get the number of filters
338 *
339 * \param audio_format_num the number identifying the audio format
340 *
341 * \return the number of filters for the given audio format
342 *
343 * \sa struct filter;
344 */
345 int num_filters(int audio_format_num)
346 {
347 return afi[audio_format_num].num_filters;
348 }
349
350 static void open_filters(int slot_num)
351 {
352 struct slot_info *s = &slot[slot_num];
353 struct audio_format_info *a = &afi[s->format];
354 struct filter_node *fn;
355 int nf = a->num_filters;
356 int i;
357
358 s->fc = NULL;
359 if (!nf)
360 return;
361 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
362 s->fc = para_calloc(sizeof(struct filter_chain));
363 s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_node));
364 s->fc->inbuf = s->receiver_node->buf;
365 s->fc->in_loaded = &s->receiver_node->loaded;
366 s->fc->input_error = &s->receiver_node->task.error;
367 s->fc->task.pre_select = filter_pre_select;
368 s->fc->task.post_select = NULL;
369 s->fc->task.error = 0;
370 s->fc->num_filters = nf;
371
372 s->receiver_node->output_error = &s->fc->task.error;
373 sprintf(s->fc->task.status, "filter chain");
374 FOR_EACH_FILTER_NODE(fn, s->fc, i) {
375 struct filter *f = filters + a->filter_nums[i];
376 fn->filter_num = a->filter_nums[i];
377 fn->conf = a->filter_conf[i];
378 fn->fc = s->fc;
379 fn->loaded = 0;
380 INIT_LIST_HEAD(&fn->callbacks);
381 f->open(fn);
382 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
383 audio_formats[s->format], i, nf, f->name, slot_num);
384 s->fc->outbuf = fn->buf;
385 s->fc->out_loaded = &fn->loaded;
386 }
387 register_task(&s->fc->task);
388 }
389
390 static void open_writers(int slot_num)
391 {
392 int ret, i;
393 struct slot_info *s = &slot[slot_num];
394 struct audio_format_info *a = &afi[s->format];
395
396 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
397 if (!a->num_writers)
398 s->wng = setup_default_wng();
399 else
400 s->wng = wng_new(a->num_writers);
401 if (s->fc) {
402 s->wng->buf = s->fc->outbuf;
403 s->wng->loaded = s->fc->out_loaded;
404 s->wng->input_error = &s->fc->task.error;
405 s->wng->channels = &s->fc->channels;
406 s->wng->samplerate = &s->fc->samplerate;
407 s->fc->output_error = &s->wng->task.error;
408 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
409 } else {
410 s->wng->buf = s->receiver_node->buf;
411 s->wng->loaded = &s->receiver_node->loaded;
412 s->wng->input_error = &s->receiver_node->task.error;
413 }
414 for (i = 0; i < a->num_writers; i++) {
415 s->wng->writer_nodes[i].conf = a->writer_conf[i];
416 s->wng->writer_nodes[i].writer = a->writers[i];
417 }
418 ret = wng_open(s->wng);
419 if (ret < 0) {
420 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
421 return;
422 }
423 s->wstime = *now;
424 activate_inactive_grab_clients(slot_num, s->format, s->fc);
425 }
426
427 static int open_receiver(int format)
428 {
429 struct audio_format_info *a = &afi[format];
430 struct slot_info *s;
431 int ret, slot_num;
432 struct receiver_node *rn;
433 const struct timeval restart_delay = {2, 0};
434
435 ret = get_empty_slot();
436 if (ret < 0)
437 goto err;
438 slot_num = ret;
439 s = &slot[slot_num];
440 s->format = format;
441 s->receiver_node = para_calloc(sizeof(struct receiver_node));
442 rn = s->receiver_node;
443 rn->receiver = a->receiver;
444 rn->conf = a->receiver_conf;
445 ret = a->receiver->open(s->receiver_node);
446 if (ret < 0) {
447 free(s->receiver_node);
448 s->receiver_node = NULL;
449 goto err;
450 }
451 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
452 audio_formats[s->format], a->receiver->name, slot_num);
453 rn->task.pre_select = a->receiver->pre_select;
454 rn->task.post_select = a->receiver->post_select;
455 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
456 register_task(&rn->task);
457 ret = 1;
458 err:
459 if (ret < 0)
460 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
461 tv_add(now, &restart_delay, &afi[format].restart_barrier);
462 return ret;
463 }
464
465 static int receiver_running(int format)
466 {
467 int i;
468
469 FOR_EACH_SLOT(i) {
470 struct slot_info *s = &slot[i];
471 if (s->format == format && s->receiver_node)
472 return 1;
473 }
474 return 0;
475 }
476
477 static void open_current_receiver(struct sched *s)
478 {
479 struct timeval diff;
480 int cafn = stat_task->current_audio_format_num;
481
482 if (cafn < 0 || !stat_task->ct)
483 return;
484 if (receiver_running(cafn))
485 return;
486 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
487 s->timeout = diff;
488 return;
489 }
490 open_receiver(cafn);
491 }
492
493 static unsigned compute_time_diff(const struct timeval *status_time)
494 {
495 struct timeval tmp, diff;
496 static unsigned count;
497 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
498 const struct timeval max_deviation = {0, 500 * 1000};
499 const int time_smooth = 5;
500
501 if (!status_time)
502 return count;
503 sign = tv_diff(status_time, now, &diff);
504 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
505 // sign, sa_time_diff_sign);
506 if (!count) {
507 sa_time_diff_sign = sign;
508 stat_task->sa_time_diff = diff;
509 count++;
510 goto out;
511 }
512 if (count > 5) {
513 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
514 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
515 PARA_WARNING_LOG("time diff jump: %lims\n",
516 s * tv2ms(&tmp));
517 }
518 count++;
519 sa_time_diff_sign = tv_convex_combination(
520 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
521 count > 10? sign : sign * time_smooth, &diff,
522 &tmp);
523 stat_task->sa_time_diff = tmp;
524 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
525 sign > 0? "+" : "-",
526 tv2ms(&diff),
527 sa_time_diff_sign ? "+" : "-",
528 tv2ms(&stat_task->sa_time_diff)
529 );
530 out:
531 stat_task->sa_time_diff_sign = sa_time_diff_sign;
532 return count;
533 }
534
535 static int check_stat_line(char *line, __a_unused void *data)
536 {
537 int itemnum;
538 size_t ilen = 0;
539 long unsigned sec, usec;
540 char *tmp;
541
542 //PARA_INFO_LOG("line: %s\n", line);
543 if (!line)
544 return 1;
545 itemnum = stat_line_valid(line);
546 if (itemnum < 0) {
547 PARA_WARNING_LOG("invalid status line: %s\n", line);
548 return 1;
549 }
550 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
551 return 1;
552 tmp = make_message("%s\n", line);
553 stat_client_write(tmp, itemnum);
554 free(tmp);
555 free(stat_item_values[itemnum]);
556 stat_item_values[itemnum] = para_strdup(line);
557 ilen = strlen(status_item_list[itemnum]);
558 switch (itemnum) {
559 case SI_STATUS:
560 stat_task->playing = strstr(line, "playing")? 1 : 0;
561 PARA_INFO_LOG("stat task playing: %d\n", stat_task->playing);
562 break;
563 case SI_OFFSET:
564 stat_task->offset_seconds = atoi(line + ilen + 1);
565 break;
566 case SI_SECONDS_TOTAL:
567 stat_task->length_seconds = atoi(line + ilen + 1);
568 break;
569 case SI_STREAM_START:
570 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
571 struct timeval a_start, delay;
572 delay.tv_sec = conf.stream_delay_arg / 1000;
573 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
574 stat_task->server_stream_start.tv_sec = sec;
575 stat_task->server_stream_start.tv_usec = usec;
576 if (compute_time_diff(NULL) > 2) {
577 if (stat_task->sa_time_diff_sign < 0)
578 tv_add(&stat_task->server_stream_start,
579 &stat_task->sa_time_diff, &a_start);
580 else
581 tv_diff(&stat_task->server_stream_start,
582 &stat_task->sa_time_diff, &a_start);
583 tv_add(&a_start, &delay, &initial_delay_barrier);
584 }
585 }
586 break;
587 case SI_CURRENT_TIME:
588 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
589 struct timeval tv = {sec, usec};
590 compute_time_diff(&tv);
591 }
592 break;
593 case SI_FORMAT:
594 stat_task->current_audio_format_num = get_audio_format_num(
595 line + ilen + 1);
596 }
597 return 1;
598 }
599
600 static int parse_stream_command(const char *txt, char **cmd)
601 {
602 char *p = strchr(txt, ':');
603 int i;
604
605 if (!p)
606 return -E_MISSING_COLON;
607 p++;
608 FOR_EACH_AUDIO_FORMAT(i) {
609 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
610 continue;
611 *cmd = p;
612 return i;
613 }
614 return -E_UNSUPPORTED_AUDIO_FORMAT;
615 }
616
617 static int add_filter(int format, char *cmdline)
618 {
619 struct audio_format_info *a = &afi[format];
620 int filter_num, nf = a->num_filters;
621
622 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
623 if (filter_num < 0)
624 return filter_num;
625 a->filter_nums[nf] = filter_num;
626 a->num_filters++;
627 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
628 filters[filter_num].name);
629 return filter_num;
630 }
631
632 static int parse_writer_args(void)
633 {
634 int i, ret, nw;
635 char *cmd;
636 struct audio_format_info *a;
637
638 nw = PARA_MAX(1U, conf.writer_given);
639 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
640 FOR_EACH_AUDIO_FORMAT(i) {
641 a = &afi[i];
642 a->writer_conf = para_malloc(nw * sizeof(void *));
643 a->writers = para_malloc(nw * sizeof(struct writer *));
644 a->num_writers = 0;
645 }
646 for (i = 0; i < conf.writer_given; i++) {
647 void *wconf;
648 int writer_num;
649 ret = parse_stream_command(conf.writer_arg[i], &cmd);
650 if (ret < 0)
651 goto out;
652 a = &afi[ret];
653 nw = a->num_writers;
654 wconf = check_writer_arg(cmd, &writer_num);
655 if (!wconf) {
656 ret = writer_num;
657 goto out;
658 }
659 a->writers[nw] = &writers[writer_num];
660 a->writer_conf[nw] = wconf;
661 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
662 nw, writer_names[writer_num]);
663 a->num_writers++;
664 }
665 ret = 1;
666 out:
667 return ret;
668 }
669
670 static int parse_receiver_args(void)
671 {
672 int i, ret, receiver_num;
673 char *cmd = NULL;
674 struct audio_format_info *a;
675
676 for (i = conf.receiver_given - 1; i >= 0; i--) {
677 char *arg = conf.receiver_arg[i];
678 char *recv_arg = strchr(arg, ':');
679 ret = -E_MISSING_COLON;
680 if (!recv_arg)
681 goto out;
682 *recv_arg = '\0';
683 recv_arg++;
684 ret = get_audio_format_num(arg);
685 if (ret < 0)
686 goto out;
687 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
688 if (!afi[ret].receiver_conf) {
689 ret = -E_RECV_SYNTAX;
690 goto out;
691 }
692 afi[ret].receiver = &receivers[receiver_num];
693 }
694 /* use the first available receiver with no arguments
695 * for those audio formats for which no receiver
696 * was specified
697 */
698 cmd = para_strdup(receivers[0].name);
699 FOR_EACH_AUDIO_FORMAT(i) {
700 a = &afi[i];
701 if (a->receiver_conf)
702 continue;
703 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
704 if (!a->receiver_conf)
705 return -E_RECV_SYNTAX;
706 a->receiver = &receivers[receiver_num];
707 }
708 ret = 1;
709 out:
710 free(cmd);
711 return ret;
712 }
713
714 static int init_default_filters(void)
715 {
716 int i, ret = 1;
717
718 FOR_EACH_AUDIO_FORMAT(i) {
719 struct audio_format_info *a = &afi[i];
720 char *tmp;
721 int j;
722
723 if (a->num_filters)
724 continue; /* no default -- nothing to to */
725 /* add "dec" to audio format name */
726 tmp = make_message("%sdec", audio_formats[i]);
727 for (j = 0; filters[j].name; j++)
728 if (!strcmp(tmp, filters[j].name))
729 break;
730 free(tmp);
731 ret = -E_UNSUPPORTED_FILTER;
732 if (!filters[j].name)
733 goto out;
734 tmp = para_strdup(filters[j].name);
735 ret = add_filter(i, tmp);
736 free(tmp);
737 if (ret < 0)
738 goto out;
739 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
740 filters[j].name);
741 }
742 out:
743 return ret;
744 }
745
746 static int parse_filter_args(void)
747 {
748 int i, ret, nf;
749
750 nf = PARA_MAX(1U, conf.filter_given);
751 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
752 FOR_EACH_AUDIO_FORMAT(i) {
753 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
754 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
755 }
756 if (!conf.no_default_filters_given)
757 return init_default_filters();
758 for (i = 0; i < conf.filter_given; i++) {
759 char *arg = conf.filter_arg[i];
760 char *filter_name = strchr(arg, ':');
761 ret = -E_MISSING_COLON;
762 if (!filter_name)
763 goto out;
764 *filter_name = '\0';
765 filter_name++;
766 ret = get_audio_format_num(arg);
767 if (ret < 0)
768 goto out;
769 ret = add_filter(ret, filter_name);
770 if (ret < 0)
771 goto out;
772 }
773 ret = init_default_filters(); /* use default values for the rest */
774 out:
775 return ret;
776 }
777
778 static int parse_stream_args(void)
779 {
780 int ret;
781
782 ret = parse_receiver_args();
783 if (ret < 0)
784 return ret;
785 ret = parse_filter_args();
786 if (ret < 0)
787 return ret;
788 ret = parse_writer_args();
789 if (ret < 0)
790 return ret;
791 return 1;
792 }
793
794 /* does not unlink socket on errors */
795 static int audiod_get_socket(void)
796 {
797 struct sockaddr_un unix_addr;
798 int ret, fd;
799
800 if (conf.socket_given)
801 socket_name = para_strdup(conf.socket_arg);
802 else {
803 char *hn = para_hostname();
804 socket_name = make_message("/var/paraslash/audiod_socket.%s",
805 hn);
806 free(hn);
807 }
808 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
809 if (conf.force_given)
810 unlink(socket_name);
811 ret = create_local_socket(socket_name, &unix_addr,
812 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
813 if (ret < 0)
814 goto err;
815 fd = ret;
816 if (listen(fd , 5) < 0) {
817 ret = -ERRNO_TO_PARA_ERROR(errno);
818 goto err;
819 }
820 ret = mark_fd_nonblocking(fd);
821 if (ret < 0)
822 goto err;
823 return fd;
824 err:
825 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
826 exit(EXIT_FAILURE);
827 }
828
829 static void signal_pre_select(struct sched *s, struct task *t)
830 {
831 struct signal_task *st = container_of(t, struct signal_task, task);
832 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
833 }
834
835 static void signal_post_select(struct sched *s, struct task *t)
836 {
837 struct signal_task *st = container_of(t, struct signal_task, task);
838
839 if (!FD_ISSET(st->fd, &s->rfds))
840 return;
841
842 st->signum = para_next_signal();
843 switch (st->signum) {
844 case SIGINT:
845 case SIGTERM:
846 case SIGHUP:
847 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
848 clean_exit(EXIT_FAILURE, "caught deadly signal");
849 }
850 }
851
852 static void signal_setup_default(struct signal_task *st)
853 {
854 st->task.pre_select = signal_pre_select;
855 st->task.post_select = signal_post_select;
856 sprintf(st->task.status, "signal task");
857 }
858
859 static void command_pre_select(struct sched *s, struct task *t)
860 {
861 struct command_task *ct = container_of(t, struct command_task, task);
862 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
863 }
864
865 static void command_post_select(struct sched *s, struct task *t)
866 {
867 int ret;
868 struct command_task *ct = container_of(t, struct command_task, task);
869
870 audiod_status_dump();
871 if (!FD_ISSET(ct->fd, &s->rfds))
872 return;
873 ret = handle_connect(ct->fd);
874 if (ret < 0)
875 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
876 }
877
878 static void init_command_task(struct command_task *ct)
879 {
880 ct->task.pre_select = command_pre_select;
881 ct->task.post_select = command_post_select;
882 ct->task.error = 0;
883 ct->fd = audiod_get_socket(); /* doesn't return on errors */
884 sprintf(ct->task.status, "command task");
885 }
886
887 static void close_stat_pipe(void)
888 {
889 int i;
890
891 if (!stat_task->ct)
892 return;
893 client_close(stat_task->ct);
894 stat_task->ct = NULL;
895 FOR_EACH_STATUS_ITEM(i) {
896 free(stat_item_values[i]);
897 stat_item_values[i] = NULL;
898 }
899 dump_empty_status();
900 stat_task->length_seconds = 0;
901 stat_task->offset_seconds = 0;
902 audiod_status_dump();
903 stat_task->playing = 0;
904 }
905
906 /**
907 * close the connection to para_server and exit
908 *
909 * \param status the exit status which is passed to exit(3)
910 * \param msg the log message
911 *
912 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
913 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
914 * EXIT_FAILURE.
915 *
916 * \sa exit(3)
917 */
918 void __noreturn clean_exit(int status, const char *msg)
919 {
920 PARA_EMERG_LOG("%s\n", msg);
921 if (socket_name)
922 unlink(socket_name);
923 close_stat_pipe();
924 exit(status);
925 }
926
927 /* avoid busy loop if server is down */
928 static void set_stat_task_restart_barrier(unsigned seconds)
929 {
930 struct timeval delay = {seconds, 0};
931 tv_add(now, &delay, &stat_task->restart_barrier);
932 }
933
934 static void try_to_close_slot(int slot_num)
935 {
936 struct slot_info *s = &slot[slot_num];
937
938 if (s->format < 0)
939 return;
940 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
941 return;
942 if (s->fc && s->fc->task.error != -E_TASK_UNREGISTERED)
943 return;
944 if (s->wng && s->wng->task.error != -E_TASK_UNREGISTERED)
945 return;
946 PARA_INFO_LOG("closing slot %d\n", slot_num);
947 wng_close(s->wng);
948 close_filters(s->fc);
949 free(s->fc);
950 close_receiver(slot_num);
951 clear_slot(slot_num);
952 }
953
954 /*
955 * Check if any receivers/filters/writers need to be started and do so if
956 * necessary.
957 */
958 static void start_stop_decoders(struct sched *s)
959 {
960 int i;
961
962 FOR_EACH_SLOT(i)
963 try_to_close_slot(i);
964 if (audiod_status != AUDIOD_ON || !stat_task->playing)
965 return kill_all_decoders(-E_NOT_PLAYING);
966 open_current_receiver(s);
967 FOR_EACH_SLOT(i) {
968 struct slot_info *sl = &slot[i];
969 struct audio_format_info *a;
970 struct timeval diff;
971
972 if (sl->format < 0)
973 continue;
974 a = &afi[sl->format];
975 if (!sl->receiver_node)
976 continue;
977 if ((!a->num_filters || sl->fc) && sl->wng)
978 continue; /* everything already started */
979 if (!a->num_filters) {
980 if (sl->receiver_node->loaded && !sl->wng) {
981 open_writers(i);
982 }
983 continue;
984 }
985 if (sl->receiver_node->loaded && !sl->fc) {
986 open_filters(i);
987 continue;
988 }
989 if (sl->wng || !sl->fc || !*sl->fc->out_loaded)
990 continue;
991 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
992 open_writers(i);
993 continue;
994 }
995 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
996 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
997 s->timeout = diff;
998 }
999 }
1000 }
1001
1002
1003 /* restart the client task if necessary */
1004 static void status_pre_select(struct sched *s, struct task *t)
1005 {
1006 struct status_task *st = container_of(t, struct status_task, task);
1007
1008 if (audiod_status == AUDIOD_OFF) {
1009 if (!st->ct)
1010 goto out;
1011 if (st->ct->task.error >= 0) {
1012 st->ct->task.error = -E_AUDIOD_OFF;
1013 goto out;
1014 }
1015 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1016 goto out;
1017 close_stat_pipe();
1018 st->clock_diff_count = conf.clock_diff_count_arg;
1019 goto out;
1020 }
1021 if (st->ct) {
1022 unsigned bytes_left;
1023 if (st->ct->task.error < 0) {
1024 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1025 goto out;
1026 close_stat_pipe();
1027 goto out;
1028 }
1029 if (st->ct->status != CL_RECEIVING)
1030 goto out;
1031 bytes_left = for_each_line(st->ct->buf, st->ct->loaded,
1032 &check_stat_line, NULL);
1033 if (st->ct->loaded != bytes_left) {
1034 st->last_status_read = *now;
1035 st->ct->loaded = bytes_left;
1036 } else {
1037 struct timeval diff;
1038 tv_diff(now, &st->last_status_read, &diff);
1039 if (diff.tv_sec > 61)
1040 st->ct->task.error = -E_STATUS_TIMEOUT;
1041 }
1042 goto out;
1043 }
1044 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1045 goto out;
1046 if (st->clock_diff_count) { /* get status only one time */
1047 char *argv[] = {"audiod", "stat", "1", NULL};
1048 int argc = 3;
1049 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1050 st->clock_diff_count--;
1051 client_open(argc, argv, &st->ct, NULL);
1052 set_stat_task_restart_barrier(2);
1053
1054 } else {
1055 char *argv[] = {"audiod", "stat", NULL};
1056 int argc = 2;
1057 client_open(argc, argv, &st->ct, NULL);
1058 set_stat_task_restart_barrier(5);
1059 }
1060 free(stat_item_values[SI_BASENAME]);
1061 stat_item_values[SI_BASENAME] = make_message(
1062 "%s: no connection to para_server\n",
1063 status_item_list[SI_BASENAME]);
1064 stat_client_write(stat_item_values[SI_BASENAME],
1065 SI_BASENAME);
1066 st->last_status_read = *now;
1067 out:
1068 start_stop_decoders(s);
1069 }
1070
1071 static void init_status_task(struct status_task *st)
1072 {
1073 memset(st, 0, sizeof(struct status_task));
1074 st->task.pre_select = status_pre_select;
1075 st->sa_time_diff_sign = 1;
1076 st->clock_diff_count = conf.clock_diff_count_arg;
1077 st->current_audio_format_num = -1;
1078 sprintf(st->task.status, "status task");
1079 }
1080
1081 static void set_initial_status(void)
1082 {
1083 audiod_status = AUDIOD_ON;
1084 if (!conf.mode_given)
1085 return;
1086 if (!strcmp(conf.mode_arg, "sb")) {
1087 audiod_status = AUDIOD_STANDBY;
1088 return;
1089 }
1090 if (!strcmp(conf.mode_arg, "off")) {
1091 audiod_status = AUDIOD_OFF;
1092 return;
1093 }
1094 if (strcmp(conf.mode_arg, "on"))
1095 PARA_WARNING_LOG("invalid mode\n");
1096 }
1097
1098 __noreturn static void print_help_and_die(void)
1099 {
1100 int d = conf.detailed_help_given;
1101 const char **p = d? audiod_args_info_detailed_help
1102 : audiod_args_info_help;
1103
1104 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1105 AUDIOD_CMDLINE_PARSER_VERSION);
1106 printf_or_die("%s\n\n", audiod_args_info_usage);
1107 for (; *p; p++)
1108 printf_or_die("%s\n", *p);
1109 print_receiver_helps(d);
1110 print_filter_helps(d);
1111 print_writer_helps(d);
1112 exit(0);
1113 }
1114
1115 static void init_colors_or_die(void)
1116 {
1117 int ret, i;
1118
1119 if (!want_colors())
1120 return;
1121 daemon_set_default_log_colors();
1122 daemon_set_flag(DF_COLOR_LOG);
1123 for (i = 0; i < conf.log_color_given; i++) {
1124 ret = daemon_set_log_color(conf.log_color_arg[i]);
1125 if (ret < 0)
1126 exit(EXIT_FAILURE);
1127 }
1128 }
1129
1130 /**
1131 * the main function of para_audiod
1132 *
1133 * \param argc usual argument count
1134 * \param argv usual argument vector
1135 *
1136 * \return EXIT_SUCCESS or EXIT_FAILURE
1137 *
1138 * \sa para_audiod(1)
1139 * */
1140 int main(int argc, char *argv[])
1141 {
1142 int ret, i;
1143 static struct sched s;
1144 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1145 struct audiod_cmdline_parser_params params = {
1146 .override = 0,
1147 .initialize = 1,
1148 .check_required = 0,
1149 .check_ambiguity = 0,
1150 .print_errors = 1
1151 };
1152
1153 valid_fd_012();
1154 if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1155 exit(EXIT_FAILURE);
1156 HANDLE_VERSION_FLAG("audiod", conf);
1157 /* init receivers/filters/writers early to make help work */
1158 recv_init();
1159 filter_init();
1160 writer_init();
1161 if (conf.help_given || conf.detailed_help_given)
1162 print_help_and_die();
1163 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1164 parse_config_or_die();
1165 init_colors_or_die();
1166 daemon_set_flag(DF_LOG_TIME);
1167 daemon_set_flag(DF_LOG_HOSTNAME);
1168 daemon_set_flag(DF_LOG_LL);
1169 if (conf.logfile_given) {
1170 daemon_set_logfile(conf.logfile_arg);
1171 daemon_open_log_or_die();
1172 }
1173 ret = parse_stream_args();
1174 if (ret < 0) {
1175 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1176 exit(EXIT_FAILURE);
1177 }
1178 log_welcome("para_audiod");
1179 server_uptime(UPTIME_SET);
1180 set_initial_status();
1181 FOR_EACH_SLOT(i)
1182 clear_slot(i);
1183 init_grabbing();
1184 setup_signal_handling();
1185 signal_setup_default(sig_task);
1186
1187 init_status_task(stat_task);
1188 init_command_task(cmd_task);
1189
1190 if (conf.daemon_given)
1191 daemonize();
1192
1193 register_task(&sig_task->task);
1194 register_task(&cmd_task->task);
1195 register_task(&stat_task->task);
1196 s.default_timeout.tv_sec = 0;
1197 s.default_timeout.tv_usec = 99 * 1000;
1198 ret = schedule(&s);
1199
1200 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1201 return EXIT_FAILURE;
1202 }