Merge commit 'meins/master'
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005-2008 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 FILE *logfile;
87 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
88
89 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
90
91 static struct status_task status_task_struct;
92
93 /**
94 * the task that calls the status command of para_server
95 *
96 * \sa struct status_task
97 */
98 static struct status_task *stat_task = &status_task_struct;
99 static struct timeval initial_delay_barrier;
100
101 /**
102 * the task for handling audiod commands
103 *
104 * \sa struct task, struct sched
105 */
106 struct command_task {
107 /** the local listening socket */
108 int fd;
109 /** the associated task structure */
110 struct task task;
111 };
112
113 /** iterate over all supported audio formats */
114 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
115
116 /**
117 * get the audio format number
118 * \param name the name of the audio format
119 *
120 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
121 * \a name is not a supported audio format.
122 */
123 int get_audio_format_num(char *name)
124 {
125 int i;
126
127 while (para_isspace(*name))
128 name++;
129 FOR_EACH_AUDIO_FORMAT(i)
130 if (!strcmp(name, audio_formats[i]))
131 return i;
132 return -E_UNSUPPORTED_AUDIO_FORMAT;
133 }
134
135 char *get_time_string(struct timeval *newest_stime)
136 {
137 struct timeval diff, adj_stream_start, tmp;
138 int total = 0, use_server_time = 1,
139 length_seconds = stat_task->length_seconds;
140
141 if (!stat_task->playing) {
142 if (length_seconds)
143 return NULL;
144 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
145 }
146 if (audiod_status == AUDIOD_OFF)
147 goto out;
148 if (stat_task->sa_time_diff_sign > 0)
149 tv_diff(&stat_task->server_stream_start, &stat_task->sa_time_diff,
150 &adj_stream_start);
151 else
152 tv_add(&stat_task->server_stream_start, &stat_task->sa_time_diff,
153 &adj_stream_start);
154 tmp = adj_stream_start;
155 if (newest_stime && audiod_status == AUDIOD_ON) {
156 tv_diff(newest_stime, &adj_stream_start, &diff);
157 if (tv2ms(&diff) < 5000) {
158 tmp = *newest_stime;
159 use_server_time = 0;
160 }
161 }
162 tv_diff(now, &tmp, &diff);
163 total = diff.tv_sec + stat_task->offset_seconds;
164 if (total > length_seconds)
165 total = length_seconds;
166 if (total < 0)
167 total = 0;
168 out:
169 return make_message(
170 "%s: %s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
171 status_item_list[SI_PLAY_TIME],
172 use_server_time? "~" : "",
173 total / 60,
174 total % 60,
175 (length_seconds - total) / 60,
176 (length_seconds - total) % 60,
177 length_seconds? (total * 100 + length_seconds / 2) /
178 length_seconds : 0,
179 length_seconds / 60,
180 length_seconds % 60
181 );
182 }
183
184 /**
185 * the log function of para_audiod
186 *
187 * \param ll loglevel
188 * \param fmt the format string
189 */
190 __printf_2_3 void para_log(int ll, const char* fmt,...)
191 {
192 va_list argp;
193 FILE *outfd;
194 struct tm *tm;
195 time_t t1;
196 char str[MAXLINE] = "";
197 static char *hostname;
198
199 if (ll < conf.loglevel_arg)
200 return;
201 if (!logfile && conf.daemon_given)
202 return;
203 if (!hostname)
204 hostname = para_hostname();
205 outfd = logfile? logfile : stderr;
206 time(&t1);
207 tm = localtime(&t1);
208 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
209 fprintf(outfd, "%s %s ", str, hostname);
210 if (conf.loglevel_arg <= INFO)
211 fprintf(outfd, "%i ", ll);
212 va_start(argp, fmt);
213 vfprintf(outfd, fmt, argp);
214 va_end(argp);
215 }
216
217 static void parse_config_or_die(void)
218 {
219 char *config_file;
220
221 if (conf.config_file_given)
222 config_file = para_strdup(conf.config_file_arg);
223 else {
224 char *home = para_homedir();
225 config_file = make_message("%s/.paraslash/audiod.conf", home);
226 free(home);
227 }
228 if (conf.config_file_given && !file_exists(config_file)) {
229 PARA_EMERG_LOG("can not read config file %s\n", config_file);
230 goto err;
231 }
232 if (config_file) {
233 struct audiod_cmdline_parser_params params = {
234 .override = 0,
235 .initialize = 0,
236 .check_required = 1,
237 .check_ambiguity = 0,
238 .print_errors = 1
239 };
240 if (audiod_cmdline_parser_config_file(config_file, &conf, &params)) {
241 PARA_EMERG_LOG("parse error in config file\n");
242 goto err;
243 }
244 }
245 free(config_file);
246 return;
247 err:
248 free(config_file);
249 exit(EXIT_FAILURE);
250 }
251
252 static void setup_signal_handling(void)
253 {
254 sig_task->fd = para_signal_init();
255 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
256 para_install_sighandler(SIGINT);
257 para_install_sighandler(SIGTERM);
258 para_install_sighandler(SIGHUP);
259 signal(SIGPIPE, SIG_IGN);
260 }
261
262 static void clear_slot(int slot_num)
263 {
264 struct slot_info *s = &slot[slot_num];
265
266 PARA_INFO_LOG("clearing slot %d\n", slot_num);
267 memset(s, 0, sizeof(struct slot_info));
268 s->format = -1;
269 }
270
271 static void close_receiver(int slot_num)
272 {
273 struct slot_info *s = &slot[slot_num];
274 struct audio_format_info *a;
275
276 if (s->format < 0 || !s->receiver_node)
277 return;
278 a = &afi[s->format];
279 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
280 audio_formats[s->format], slot_num);
281 a->receiver->close(s->receiver_node);
282 free(s->receiver_node);
283 s->receiver_node = NULL;
284 }
285
286 static void kill_all_decoders(int error)
287 {
288 int i;
289
290 FOR_EACH_SLOT(i) {
291 struct slot_info *s = &slot[i];
292 if (s->wng && s->wng->task.error >= 0) {
293 PARA_INFO_LOG("deactivating wng in slot %d\n",
294 i);
295 s->wng->task.error = error;
296 }
297 if (s->fc && s->fc->task.error >= 0) {
298 PARA_INFO_LOG("deactivatimg filter chain in slot %d\n", i);
299 s->fc->task.error = error;
300 }
301 if (s->receiver_node && s->receiver_node->task.error >= 0) {
302 PARA_INFO_LOG("deactivating receiver_node in slot %d\n", i);
303 s->receiver_node->task.error = error;
304 }
305 }
306 }
307
308 static int get_empty_slot(void)
309 {
310 int i;
311 struct slot_info *s;
312
313 FOR_EACH_SLOT(i) {
314 s = &slot[i];
315 if (s->format < 0) {
316 clear_slot(i);
317 return i;
318 }
319 if (s->wng || s->receiver_node || s->fc)
320 continue;
321 clear_slot(i);
322 return i;
323 }
324 return -E_NO_MORE_SLOTS;
325 }
326
327 /**
328 * get the number of filters
329 *
330 * \param audio_format_num the number identifying the audio format
331 *
332 * \return the number of filters for the given audio format
333 *
334 * \sa struct filter;
335 */
336 int num_filters(int audio_format_num)
337 {
338 return afi[audio_format_num].num_filters;
339 }
340
341 static void open_filters(int slot_num)
342 {
343 struct slot_info *s = &slot[slot_num];
344 struct audio_format_info *a = &afi[s->format];
345 struct filter_node *fn;
346 int nf = a->num_filters;
347 int i;
348
349 s->fc = NULL;
350 if (!nf)
351 return;
352 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
353 s->fc = para_calloc(sizeof(struct filter_chain));
354 s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_node));
355 s->fc->inbuf = s->receiver_node->buf;
356 s->fc->in_loaded = &s->receiver_node->loaded;
357 s->fc->input_error = &s->receiver_node->task.error;
358 s->fc->task.pre_select = filter_pre_select;
359 s->fc->task.post_select = NULL;
360 s->fc->task.error = 0;
361 s->fc->num_filters = nf;
362
363 s->receiver_node->output_error = &s->fc->task.error;
364 sprintf(s->fc->task.status, "filter chain");
365 FOR_EACH_FILTER_NODE(fn, s->fc, i) {
366 struct filter *f = filters + a->filter_nums[i];
367 fn->filter_num = a->filter_nums[i];
368 fn->conf = a->filter_conf[i];
369 fn->fc = s->fc;
370 fn->loaded = 0;
371 INIT_LIST_HEAD(&fn->callbacks);
372 f->open(fn);
373 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
374 audio_formats[s->format], i, nf, f->name, slot_num);
375 s->fc->outbuf = fn->buf;
376 s->fc->out_loaded = &fn->loaded;
377 }
378 register_task(&s->fc->task);
379 }
380
381 static void open_writers(int slot_num)
382 {
383 int ret, i;
384 struct slot_info *s = &slot[slot_num];
385 struct audio_format_info *a = &afi[s->format];
386
387 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
388 if (!a->num_writers)
389 s->wng = setup_default_wng();
390 else
391 s->wng = wng_new(a->num_writers);
392 if (s->fc) {
393 s->wng->buf = s->fc->outbuf;
394 s->wng->loaded = s->fc->out_loaded;
395 s->wng->input_error = &s->fc->task.error;
396 s->wng->channels = &s->fc->channels;
397 s->wng->samplerate = &s->fc->samplerate;
398 s->fc->output_error = &s->wng->task.error;
399 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
400 } else {
401 s->wng->buf = s->receiver_node->buf;
402 s->wng->loaded = &s->receiver_node->loaded;
403 s->wng->input_error = &s->receiver_node->task.error;
404 }
405 for (i = 0; i < a->num_writers; i++) {
406 s->wng->writer_nodes[i].conf = a->writer_conf[i];
407 s->wng->writer_nodes[i].writer = a->writers[i];
408 }
409 ret = wng_open(s->wng);
410 if (ret < 0) {
411 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
412 return;
413 }
414 s->wstime = *now;
415 activate_inactive_grab_clients(slot_num, s->format, s->fc);
416 }
417
418 static int open_receiver(int format)
419 {
420 struct audio_format_info *a = &afi[format];
421 struct slot_info *s;
422 int ret, slot_num;
423 struct receiver_node *rn;
424 const struct timeval restart_delay = {2, 0};
425
426 ret = get_empty_slot();
427 if (ret < 0)
428 goto err;
429 slot_num = ret;
430 s = &slot[slot_num];
431 s->format = format;
432 s->receiver_node = para_calloc(sizeof(struct receiver_node));
433 rn = s->receiver_node;
434 rn->receiver = a->receiver;
435 rn->conf = a->receiver_conf;
436 ret = a->receiver->open(s->receiver_node);
437 if (ret < 0) {
438 free(s->receiver_node);
439 s->receiver_node = NULL;
440 goto err;
441 }
442 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
443 audio_formats[s->format], a->receiver->name, slot_num);
444 rn->task.pre_select = a->receiver->pre_select;
445 rn->task.post_select = a->receiver->post_select;
446 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
447 register_task(&rn->task);
448 ret = 1;
449 err:
450 if (ret < 0)
451 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
452 tv_add(now, &restart_delay, &afi[format].restart_barrier);
453 return ret;
454 }
455
456 static int receiver_running(int format)
457 {
458 int i;
459
460 FOR_EACH_SLOT(i) {
461 struct slot_info *s = &slot[i];
462 if (s->format == format && s->receiver_node)
463 return 1;
464 }
465 return 0;
466 }
467
468 static int open_current_receiver(struct sched *s)
469 {
470 struct timeval diff;
471 int cafn = stat_task->current_audio_format_num;
472
473 if (cafn < 0 || !stat_task->ct)
474 return 0;
475 if (receiver_running(cafn))
476 return 0;
477 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
478 s->timeout = diff;
479 return 0;
480 }
481 return open_receiver(cafn) < 0? 0 : 1;
482 }
483
484 static unsigned compute_time_diff(const struct timeval *status_time)
485 {
486 struct timeval tmp, diff;
487 static unsigned count;
488 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
489 const struct timeval max_deviation = {0, 500 * 1000};
490 const int time_smooth = 5;
491
492 if (!status_time)
493 return count;
494 sign = tv_diff(status_time, now, &diff);
495 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
496 // sign, sa_time_diff_sign);
497 if (!count) {
498 sa_time_diff_sign = sign;
499 stat_task->sa_time_diff = diff;
500 count++;
501 goto out;
502 }
503 if (count > 5) {
504 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
505 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
506 PARA_WARNING_LOG("time diff jump: %lims\n",
507 s * tv2ms(&tmp));
508 }
509 count++;
510 sa_time_diff_sign = tv_convex_combination(
511 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
512 count > 10? sign : sign * time_smooth, &diff,
513 &tmp);
514 stat_task->sa_time_diff = tmp;
515 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
516 sign > 0? "+" : "-",
517 tv2ms(&diff),
518 sa_time_diff_sign ? "+" : "-",
519 tv2ms(&stat_task->sa_time_diff)
520 );
521 out:
522 stat_task->sa_time_diff_sign = sa_time_diff_sign;
523 return count;
524 }
525
526 static int check_stat_line(char *line, __a_unused void *data)
527 {
528 int itemnum;
529 size_t ilen = 0;
530 long unsigned sec, usec;
531 char *tmp;
532
533 //PARA_INFO_LOG("line: %s\n", line);
534 if (!line)
535 return 1;
536 itemnum = stat_line_valid(line);
537 if (itemnum < 0) {
538 PARA_WARNING_LOG("invalid status line: %s\n", line);
539 return 1;
540 }
541 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
542 return 1;
543 tmp = make_message("%s\n", line);
544 stat_client_write(tmp, itemnum);
545 free(tmp);
546 free(stat_item_values[itemnum]);
547 stat_item_values[itemnum] = para_strdup(line);
548 ilen = strlen(status_item_list[itemnum]);
549 switch (itemnum) {
550 case SI_STATUS:
551 stat_task->playing = strstr(line, "playing")? 1 : 0;
552 PARA_INFO_LOG("stat task playing: %d\n", stat_task->playing);
553 break;
554 case SI_OFFSET:
555 stat_task->offset_seconds = atoi(line + ilen + 1);
556 break;
557 case SI_SECONDS_TOTAL:
558 stat_task->length_seconds = atoi(line + ilen + 1);
559 break;
560 case SI_STREAM_START:
561 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
562 struct timeval a_start, delay;
563 delay.tv_sec = conf.stream_delay_arg / 1000;
564 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
565 stat_task->server_stream_start.tv_sec = sec;
566 stat_task->server_stream_start.tv_usec = usec;
567 if (compute_time_diff(NULL) > 2) {
568 if (stat_task->sa_time_diff_sign < 0)
569 tv_add(&stat_task->server_stream_start,
570 &stat_task->sa_time_diff, &a_start);
571 else
572 tv_diff(&stat_task->server_stream_start,
573 &stat_task->sa_time_diff, &a_start);
574 tv_add(&a_start, &delay, &initial_delay_barrier);
575 }
576 }
577 break;
578 case SI_CURRENT_TIME:
579 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
580 struct timeval tv = {sec, usec};
581 compute_time_diff(&tv);
582 }
583 break;
584 case SI_FORMAT:
585 stat_task->current_audio_format_num = get_audio_format_num(
586 line + ilen + 1);
587 }
588 return 1;
589 }
590
591 static int parse_stream_command(const char *txt, char **cmd)
592 {
593 char *p = strchr(txt, ':');
594 int i;
595
596 if (!p)
597 return -E_MISSING_COLON;
598 p++;
599 FOR_EACH_AUDIO_FORMAT(i) {
600 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
601 continue;
602 *cmd = p;
603 return i;
604 }
605 return -E_UNSUPPORTED_AUDIO_FORMAT;
606 }
607
608 static int add_filter(int format, char *cmdline)
609 {
610 struct audio_format_info *a = &afi[format];
611 int filter_num, nf = a->num_filters;
612
613 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
614 if (filter_num < 0)
615 return filter_num;
616 a->filter_nums[nf] = filter_num;
617 a->num_filters++;
618 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
619 filters[filter_num].name);
620 return filter_num;
621 }
622
623 static int init_writers(void)
624 {
625 int i, ret, nw;
626 char *cmd;
627 struct audio_format_info *a;
628
629 init_supported_writers();
630 nw = PARA_MAX(1U, conf.writer_given);
631 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
632 FOR_EACH_AUDIO_FORMAT(i) {
633 a = &afi[i];
634 a->writer_conf = para_malloc(nw * sizeof(void *));
635 a->writers = para_malloc(nw * sizeof(struct writer *));
636 a->num_writers = 0;
637 }
638 for (i = 0; i < conf.writer_given; i++) {
639 void *wconf;
640 int writer_num;
641 ret = parse_stream_command(conf.writer_arg[i], &cmd);
642 if (ret < 0)
643 goto out;
644 a = &afi[ret];
645 nw = a->num_writers;
646 wconf = check_writer_arg(cmd, &writer_num);
647 if (!wconf) {
648 ret = writer_num;
649 goto out;
650 }
651 a->writers[nw] = &writers[writer_num];
652 a->writer_conf[nw] = wconf;
653 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
654 nw, writer_names[writer_num]);
655 a->num_writers++;
656 }
657 ret = 1;
658 out:
659 return ret;
660 }
661
662 static int init_receivers(void)
663 {
664 int i, ret, receiver_num;
665 char *cmd = NULL;
666 struct audio_format_info *a;
667
668 for (i = 0; receivers[i].name; i++) {
669 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
670 receivers[i].init(&receivers[i]);
671 }
672 for (i = conf.receiver_given - 1; i >= 0; i--) {
673 char *arg = conf.receiver_arg[i];
674 char *recv_arg = strchr(arg, ':');
675 ret = -E_MISSING_COLON;
676 if (!recv_arg)
677 goto out;
678 *recv_arg = '\0';
679 recv_arg++;
680 ret = get_audio_format_num(arg);
681 if (ret < 0)
682 goto out;
683 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
684 if (!afi[ret].receiver_conf) {
685 ret = -E_RECV_SYNTAX;
686 goto out;
687 }
688 afi[ret].receiver = &receivers[receiver_num];
689 }
690 /* use the first available receiver with no arguments
691 * for those audio formats for which no receiver
692 * was specified
693 */
694 cmd = para_strdup(receivers[0].name);
695 FOR_EACH_AUDIO_FORMAT(i) {
696 a = &afi[i];
697 if (a->receiver_conf)
698 continue;
699 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
700 if (!a->receiver_conf)
701 return -E_RECV_SYNTAX;
702 a->receiver = &receivers[receiver_num];
703 }
704 ret = 1;
705 out:
706 free(cmd);
707 return ret;
708 }
709
710 static int init_default_filters(void)
711 {
712 int i, ret = 1;
713
714 FOR_EACH_AUDIO_FORMAT(i) {
715 struct audio_format_info *a = &afi[i];
716 char *tmp;
717 int j;
718
719 if (a->num_filters)
720 continue; /* no default -- nothing to to */
721 /* add "dec" to audio format name */
722 tmp = make_message("%sdec", audio_formats[i]);
723 for (j = 0; filters[j].name; j++)
724 if (!strcmp(tmp, filters[j].name))
725 break;
726 free(tmp);
727 ret = -E_UNSUPPORTED_FILTER;
728 if (!filters[j].name)
729 goto out;
730 tmp = para_strdup(filters[j].name);
731 ret = add_filter(i, tmp);
732 free(tmp);
733 if (ret < 0)
734 goto out;
735 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
736 filters[j].name);
737 }
738 out:
739 return ret;
740 }
741
742 static int init_filters(void)
743 {
744 int i, ret, nf;
745
746 filter_init(filters);
747 nf = PARA_MAX(1U, conf.filter_given);
748 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
749 FOR_EACH_AUDIO_FORMAT(i) {
750 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
751 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
752 }
753 if (!conf.no_default_filters_given)
754 return init_default_filters();
755 for (i = 0; i < conf.filter_given; i++) {
756 char *arg = conf.filter_arg[i];
757 char *filter_name = strchr(arg, ':');
758 ret = -E_MISSING_COLON;
759 if (!filter_name)
760 goto out;
761 *filter_name = '\0';
762 filter_name++;
763 ret = get_audio_format_num(arg);
764 if (ret < 0)
765 goto out;
766 ret = add_filter(ret, filter_name);
767 if (ret < 0)
768 goto out;
769 }
770 ret = init_default_filters(); /* use default values for the rest */
771 out:
772 return ret;
773 }
774
775 static int init_stream_io(void)
776 {
777 int ret;
778
779 ret = init_writers();
780 if (ret < 0)
781 return ret;
782 ret = init_receivers();
783 if (ret < 0)
784 return ret;
785 ret = init_filters();
786 if (ret < 0)
787 return ret;
788 return 1;
789 }
790
791 /* does not unlink socket on errors */
792 static int audiod_get_socket(void)
793 {
794 struct sockaddr_un unix_addr;
795 int ret, fd;
796
797 if (conf.socket_given)
798 socket_name = para_strdup(conf.socket_arg);
799 else {
800 char *hn = para_hostname();
801 socket_name = make_message("/var/paraslash/audiod_socket.%s",
802 hn);
803 free(hn);
804 }
805 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
806 if (conf.force_given)
807 unlink(socket_name);
808 ret = create_local_socket(socket_name, &unix_addr,
809 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
810 if (ret < 0)
811 goto err;
812 fd = ret;
813 if (listen(fd , 5) < 0) {
814 ret = -ERRNO_TO_PARA_ERROR(errno);
815 goto err;
816 }
817 ret = mark_fd_nonblocking(fd);
818 if (ret < 0)
819 goto err;
820 return fd;
821 err:
822 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
823 exit(EXIT_FAILURE);
824 }
825
826 static void signal_pre_select(struct sched *s, struct task *t)
827 {
828 struct signal_task *st = container_of(t, struct signal_task, task);
829 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
830 }
831
832 static void signal_post_select(struct sched *s, struct task *t)
833 {
834 struct signal_task *st = container_of(t, struct signal_task, task);
835
836 if (!FD_ISSET(st->fd, &s->rfds))
837 return;
838
839 st->signum = para_next_signal();
840 switch (st->signum) {
841 case SIGINT:
842 case SIGTERM:
843 case SIGHUP:
844 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
845 clean_exit(EXIT_FAILURE, "caught deadly signal");
846 }
847 }
848
849 static void signal_setup_default(struct signal_task *st)
850 {
851 st->task.pre_select = signal_pre_select;
852 st->task.post_select = signal_post_select;
853 sprintf(st->task.status, "signal task");
854 }
855
856 static void command_pre_select(struct sched *s, struct task *t)
857 {
858 struct command_task *ct = container_of(t, struct command_task, task);
859 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
860 }
861
862 static void command_post_select(struct sched *s, struct task *t)
863 {
864 int ret;
865 struct command_task *ct = container_of(t, struct command_task, task);
866
867 audiod_status_dump();
868 if (!FD_ISSET(ct->fd, &s->rfds))
869 return;
870 ret = handle_connect(ct->fd);
871 if (ret < 0)
872 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
873 }
874
875 static void init_command_task(struct command_task *ct)
876 {
877 ct->task.pre_select = command_pre_select;
878 ct->task.post_select = command_post_select;
879 ct->task.error = 0;
880 ct->fd = audiod_get_socket(); /* doesn't return on errors */
881 sprintf(ct->task.status, "command task");
882 }
883
884 static void close_stat_pipe(void)
885 {
886 int i;
887
888 if (!stat_task->ct)
889 return;
890 client_close(stat_task->ct);
891 stat_task->ct = NULL;
892 FOR_EACH_STATUS_ITEM(i) {
893 free(stat_item_values[i]);
894 stat_item_values[i] = NULL;
895 }
896 dump_empty_status();
897 stat_task->length_seconds = 0;
898 stat_task->offset_seconds = 0;
899 audiod_status_dump();
900 stat_task->playing = 0;
901 }
902
903 /**
904 * close the connection to para_server and exit
905 *
906 * \param status the exit status which is passed to exit(3)
907 * \param msg the log message
908 *
909 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
910 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
911 * EXIT_FAILURE.
912 *
913 * \sa exit(3)
914 */
915 void __noreturn clean_exit(int status, const char *msg)
916 {
917 PARA_EMERG_LOG("%s\n", msg);
918 if (socket_name)
919 unlink(socket_name);
920 close_stat_pipe();
921 exit(status);
922 }
923
924 /* avoid busy loop if server is down */
925 static void set_stat_task_restart_barrier(unsigned seconds)
926 {
927 struct timeval delay = {seconds, 0};
928 tv_add(now, &delay, &stat_task->restart_barrier);
929 }
930
931 static void try_to_close_slot(int slot_num)
932 {
933 struct slot_info *s = &slot[slot_num];
934
935 if (s->format < 0)
936 return;
937 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
938 return;
939 if (s->fc && s->fc->task.error != -E_TASK_UNREGISTERED)
940 return;
941 if (s->wng && s->wng->task.error != -E_TASK_UNREGISTERED)
942 return;
943 PARA_INFO_LOG("closing slot %d\n", slot_num);
944 wng_close(s->wng);
945 close_filters(s->fc);
946 free(s->fc);
947 close_receiver(slot_num);
948 clear_slot(slot_num);
949 }
950
951 /*
952 * Check if any receivers/filters/writers need to be started and do so if
953 * necessary.
954 */
955 static void start_stop_decoders(struct sched *s)
956 {
957 int i;
958
959 FOR_EACH_SLOT(i)
960 try_to_close_slot(i);
961 if (audiod_status != AUDIOD_ON || !stat_task->playing)
962 return kill_all_decoders(-E_NOT_PLAYING);
963 open_current_receiver(s);
964 FOR_EACH_SLOT(i) {
965 struct slot_info *sl = &slot[i];
966 struct audio_format_info *a;
967 struct timeval diff;
968
969 if (sl->format < 0)
970 continue;
971 a = &afi[sl->format];
972 if (!sl->receiver_node)
973 continue;
974 if ((!a->num_filters || sl->fc) && sl->wng)
975 continue; /* everything already started */
976 if (!a->num_filters) {
977 if (sl->receiver_node->loaded && !sl->wng) {
978 open_writers(i);
979 }
980 continue;
981 }
982 if (sl->receiver_node->loaded && !sl->fc) {
983 open_filters(i);
984 continue;
985 }
986 if (sl->wng || !sl->fc || !*sl->fc->out_loaded)
987 continue;
988 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
989 open_writers(i);
990 continue;
991 }
992 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
993 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
994 s->timeout = diff;
995 }
996 }
997 }
998
999
1000 /* restart the client task if necessary */
1001 static void status_pre_select(struct sched *s, struct task *t)
1002 {
1003 struct status_task *st = container_of(t, struct status_task, task);
1004
1005 if (audiod_status == AUDIOD_OFF) {
1006 if (!st->ct)
1007 goto out;
1008 if (st->ct->task.error >= 0) {
1009 st->ct->task.error = -E_AUDIOD_OFF;
1010 goto out;
1011 }
1012 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1013 goto out;
1014 close_stat_pipe();
1015 st->clock_diff_count = conf.clock_diff_count_arg;
1016 goto out;
1017 }
1018 if (st->ct) {
1019 unsigned bytes_left;
1020 if (st->ct->task.error < 0) {
1021 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1022 goto out;
1023 close_stat_pipe();
1024 goto out;
1025 }
1026 if (st->ct->status != CL_RECEIVING)
1027 goto out;
1028 bytes_left = for_each_line(st->ct->buf, st->ct->loaded,
1029 &check_stat_line, NULL);
1030 if (st->ct->loaded != bytes_left) {
1031 st->last_status_read = *now;
1032 st->ct->loaded = bytes_left;
1033 } else {
1034 struct timeval diff;
1035 tv_diff(now, &st->last_status_read, &diff);
1036 if (diff.tv_sec > 61)
1037 st->ct->task.error = -E_STATUS_TIMEOUT;
1038 }
1039 goto out;
1040 }
1041 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1042 goto out;
1043 if (st->clock_diff_count) { /* get status only one time */
1044 char *argv[] = {"audiod", "stat", "1", NULL};
1045 int argc = 3;
1046 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1047 st->clock_diff_count--;
1048 client_open(argc, argv, &st->ct);
1049 set_stat_task_restart_barrier(2);
1050
1051 } else {
1052 char *argv[] = {"audiod", "stat", NULL};
1053 int argc = 2;
1054 client_open(argc, argv, &st->ct);
1055 set_stat_task_restart_barrier(5);
1056 }
1057 free(stat_item_values[SI_BASENAME]);
1058 stat_item_values[SI_BASENAME] = make_message(
1059 "%s: no connection to para_server\n",
1060 status_item_list[SI_BASENAME]);
1061 stat_client_write(stat_item_values[SI_BASENAME],
1062 SI_BASENAME);
1063 st->last_status_read = *now;
1064 out:
1065 start_stop_decoders(s);
1066 }
1067
1068 static void init_status_task(struct status_task *st)
1069 {
1070 memset(st, 0, sizeof(struct status_task));
1071 st->task.pre_select = status_pre_select;
1072 st->sa_time_diff_sign = 1;
1073 st->clock_diff_count = conf.clock_diff_count_arg;
1074 st->current_audio_format_num = -1;
1075 sprintf(st->task.status, "status task");
1076 }
1077
1078 static void set_initial_status(void)
1079 {
1080 audiod_status = AUDIOD_ON;
1081 if (!conf.mode_given)
1082 return;
1083 if (!strcmp(conf.mode_arg, "sb")) {
1084 audiod_status = AUDIOD_STANDBY;
1085 return;
1086 }
1087 if (!strcmp(conf.mode_arg, "off")) {
1088 audiod_status = AUDIOD_OFF;
1089 return;
1090 }
1091 if (strcmp(conf.mode_arg, "on"))
1092 PARA_WARNING_LOG("invalid mode\n");
1093 }
1094
1095 __noreturn static void print_help_and_die(void)
1096 {
1097 int d = conf.detailed_help_given;
1098 const char **p = d? audiod_args_info_detailed_help
1099 : audiod_args_info_help;
1100
1101 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1102 AUDIOD_CMDLINE_PARSER_VERSION);
1103 printf_or_die("%s\n\n", audiod_args_info_usage);
1104 for (; *p; p++)
1105 printf_or_die("%s\n", *p);
1106 print_receiver_helps(d);
1107 print_filter_helps(d);
1108 print_writer_helps(d);
1109 exit(0);
1110 }
1111
1112
1113 /**
1114 * the main function of para_audiod
1115 *
1116 * \param argc usual argument count
1117 * \param argv usual argument vector
1118 *
1119 * \return EXIT_SUCCESS or EXIT_FAILURE
1120 *
1121 * \sa para_audiod(1)
1122 * */
1123 int main(int argc, char *argv[])
1124 {
1125 int ret, i;
1126 static struct sched s;
1127 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1128 struct audiod_cmdline_parser_params params = {
1129 .override = 0,
1130 .initialize = 1,
1131 .check_required = 0,
1132 .check_ambiguity = 0,
1133 .print_errors = 1
1134 };
1135
1136 valid_fd_012();
1137 audiod_cmdline_parser_ext(argc, argv, &conf, &params);
1138 HANDLE_VERSION_FLAG("audiod", conf);
1139 para_drop_privileges(conf.user_arg, conf.group_arg);
1140 parse_config_or_die();
1141 if (conf.logfile_given)
1142 logfile = open_log(conf.logfile_arg);
1143 i = init_stream_io();
1144 if (conf.help_given || conf.detailed_help_given)
1145 print_help_and_die();
1146 if (i < 0) {
1147 PARA_EMERG_LOG("init stream io error: %s\n", para_strerror(-i));
1148 exit(EXIT_FAILURE);
1149 }
1150 log_welcome("para_audiod", conf.loglevel_arg);
1151 server_uptime(UPTIME_SET);
1152 set_initial_status();
1153 FOR_EACH_SLOT(i)
1154 clear_slot(i);
1155 init_grabbing();
1156 setup_signal_handling();
1157 signal_setup_default(sig_task);
1158
1159 init_status_task(stat_task);
1160 init_command_task(cmd_task);
1161
1162 if (conf.daemon_given)
1163 daemon_init();
1164
1165 register_task(&sig_task->task);
1166 register_task(&cmd_task->task);
1167 register_task(&stat_task->task);
1168 s.default_timeout.tv_sec = 0;
1169 s.default_timeout.tv_usec = 99 * 1000;
1170 ret = schedule(&s);
1171
1172 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1173 return EXIT_FAILURE;
1174 }