Add btr support to the oggdec filter.
[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 <regex.h>
9 #include <sys/types.h>
10 #include <dirent.h>
11 #include <signal.h>
12 #include <openssl/rc4.h>
13 #include <stdbool.h>
14
15 #include "para.h"
16 #include "error.h"
17 #include "crypt.h"
18 #include "audiod.cmdline.h"
19 #include "list.h"
20 #include "sched.h"
21 #include "ggo.h"
22 #include "recv.h"
23 #include "buffer_tree.h"
24 #include "filter.h"
25 #include "grab_client.h"
26 #include "client.cmdline.h"
27 #include "client.h"
28 #include "audiod.h"
29 #include "net.h"
30 #include "daemon.h"
31 #include "string.h"
32 #include "fd.h"
33 #include "write.h"
34 #include "write_common.h"
35 #include "signal.h"
36
37 /** define the array of error lists needed by para_audiod */
38 INIT_AUDIOD_ERRLISTS;
39 /** define the array containing all supported audio formats */
40 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
41
42 /** Defines how audiod handles one supported audio format. */
43 struct audio_format_info {
44 /** pointer to the receiver for this audio format */
45 struct receiver *receiver;
46 /** the receiver configuration */
47 void *receiver_conf;
48 /** the number of filters that should be activated for this audio format */
49 unsigned int num_filters;
50 /** Array of filter numbers to be activated. */
51 unsigned *filter_nums;
52 /** Pointer to the array of filter configurations. */
53 void **filter_conf;
54 /** the number of filters that should be activated for this audio format */
55 unsigned int num_writers;
56 /** Array of writer numbers to be activated. */
57 int *writer_nums;
58 /** pointer to the array of writer configurations */
59 void **writer_conf;
60 /** do not start receiver/filters/writer before this time */
61 struct timeval restart_barrier;
62 };
63
64 /**
65 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
66 * be associated with a receiver/filter/writer triple. This array holds all
67 * information on the status of these slots.
68 *
69 * \sa struct slot_info
70 * */
71 struct slot_info slot[MAX_STREAM_SLOTS];
72
73 /** The vss status flags audiod is interested in. */
74 enum vss_status_flags {
75 /** Whether the 'N' flag is set. */
76 VSS_STATUS_FLAG_NEXT = 1,
77 /** The 'P' flag is set. */
78 VSS_STATUS_FLAG_PLAYING = 2,
79 };
80
81 /**
82 * The task for obtaining para_server's status (para_client stat).
83 *
84 * \sa struct task, struct sched.
85 */
86 struct status_task {
87 /** The associated task structure of audiod. */
88 struct task task;
89 /** Client data associated with the stat task. */
90 struct client_task *ct;
91 /** Do not restart client command until this time. */
92 struct timeval restart_barrier;
93 /** Last time we received status data from para_server. */
94 struct timeval last_status_read;
95 /** The offset value announced by para_server. */
96 int offset_seconds;
97 /** The length of the current audio file as announced by para_server. */
98 int length_seconds;
99 /** The start of the current stream from the view of para_server. */
100 struct timeval server_stream_start;
101 /** The average time deviation between para_server and para_audiod. */
102 struct timeval sa_time_diff;
103 /** Whether client time is ahead of server time. */
104 int sa_time_diff_sign;
105 /** The 'P' and the 'N' flags as announced by para_server. */
106 enum vss_status_flags vss_status;
107 /** Number of times the clock difference is to be checked. */
108 unsigned clock_diff_count;
109 /** When to start the next check for clock difference. */
110 struct timeval clock_diff_barrier;
111 /** Number of the audio format as announced by para_server. */
112 int current_audio_format_num;
113 };
114
115 /** The array of status items sent by para_server. */
116 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
117
118 /**
119 * the current mode of operation of which can be changed by the on/off/cycle
120 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
121 */
122 int audiod_status = AUDIOD_ON;
123
124 /**
125 * the gengetopt args_info struct that holds information on all command line
126 * arguments
127 */
128 struct audiod_args_info conf;
129
130 static char *socket_name;
131 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
132
133 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
134
135 static struct status_task status_task_struct;
136
137 /**
138 * the task that calls the status command of para_server
139 *
140 * \sa struct status_task
141 */
142 static struct status_task *stat_task = &status_task_struct;
143 static struct timeval initial_delay_barrier;
144
145 /**
146 * the task for handling audiod commands
147 *
148 * \sa struct task, struct sched
149 */
150 struct command_task {
151 /** the local listening socket */
152 int fd;
153 /** the associated task structure */
154 struct task task;
155 };
156
157 /** iterate over all supported audio formats */
158 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
159
160 /**
161 * get the audio format number
162 * \param name the name of the audio format
163 *
164 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
165 * \a name is not a supported audio format.
166 */
167 int get_audio_format_num(const char *name)
168 {
169 int i;
170
171 while (para_isspace(*name))
172 name++;
173 FOR_EACH_AUDIO_FORMAT(i)
174 if (!strcmp(name, audio_formats[i]))
175 return i;
176 return -E_UNSUPPORTED_AUDIO_FORMAT;
177 }
178
179 char *get_time_string(int slot_num)
180 {
181 int ret, seconds = 0, length;
182 struct timeval *tmp, sum, sss, /* server stream start */
183 wtime, /* now - writer start */
184 rskip; /* receiver start - sss */
185 struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
186
187 if (audiod_status == AUDIOD_OFF)
188 goto empty;
189 if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
190 if (stat_task->length_seconds) /* paused */
191 return NULL;
192 goto empty; /* stopped */
193 }
194 if (audiod_status == AUDIOD_ON && !s)
195 goto empty;
196 /* valid status items and playing */
197 if (s) { /* writer active in this slot */
198 length = s->seconds_total;
199 tmp = &s->server_stream_start;
200 } else { /* standby mode, rely on status items */
201 length = stat_task->length_seconds;
202 tmp = &stat_task->server_stream_start;
203 }
204 if (stat_task->sa_time_diff_sign > 0)
205 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
206 else
207 tv_add(tmp, &stat_task->sa_time_diff, &sss);
208 if (!s) {
209 struct timeval diff;
210 tv_diff(now, &sss, &diff);
211 seconds = diff.tv_sec + stat_task->offset_seconds;
212 goto out;
213 }
214 tv_diff(now, &s->wstime, &wtime);
215 seconds = s->offset_seconds;
216 ret = tv_diff(&s->rstime, &sss, &rskip);
217 if (ret > 0) { /* audiod was started in the middle of the stream */
218 tv_add(&wtime, &rskip, &sum);
219 seconds += sum.tv_sec;
220 } else
221 seconds += wtime.tv_sec;
222 out:
223 seconds = PARA_MIN(seconds, length);
224 seconds = PARA_MAX(seconds, 0);
225 return make_message(
226 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
227 s? "" : "~",
228 seconds / 60,
229 seconds % 60,
230 (length - seconds) / 60,
231 (length - seconds) % 60,
232 length? (seconds * 100 + length / 2) / length : 0,
233 length / 60,
234 length % 60
235 );
236 empty:
237 return para_strdup(NULL);
238 }
239
240 static int want_colors(void)
241 {
242 if (conf.color_arg == color_arg_no)
243 return 0;
244 if (conf.color_arg == color_arg_yes)
245 return 1;
246 if (conf.logfile_given)
247 return 0;
248 return isatty(STDERR_FILENO);
249 }
250
251 static void parse_config_or_die(void)
252 {
253 int ret;
254 char *config_file;
255 struct audiod_cmdline_parser_params params = {
256 .override = 0,
257 .initialize = 0,
258 .check_required = 1,
259 .check_ambiguity = 0,
260 .print_errors = 1
261 };
262
263 if (conf.config_file_given)
264 config_file = para_strdup(conf.config_file_arg);
265 else {
266 char *home = para_homedir();
267 config_file = make_message("%s/.paraslash/audiod.conf", home);
268 free(home);
269 }
270 ret = file_exists(config_file);
271 if (conf.config_file_given && !ret) {
272 PARA_EMERG_LOG("can not read config file %s\n", config_file);
273 goto err;
274 }
275 if (ret)
276 audiod_cmdline_parser_config_file(config_file, &conf, &params);
277 free(config_file);
278 daemon_set_loglevel(conf.loglevel_arg);
279 return;
280 err:
281 free(config_file);
282 exit(EXIT_FAILURE);
283 }
284
285 static void setup_signal_handling(void)
286 {
287 sig_task->fd = para_signal_init();
288 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
289 para_install_sighandler(SIGINT);
290 para_install_sighandler(SIGTERM);
291 para_install_sighandler(SIGHUP);
292 para_sigaction(SIGPIPE, SIG_IGN);
293 }
294
295 static void clear_slot(int slot_num)
296 {
297 struct slot_info *s = &slot[slot_num];
298
299 PARA_INFO_LOG("clearing slot %d\n", slot_num);
300 memset(s, 0, sizeof(struct slot_info));
301 s->format = -1;
302 }
303
304 static void close_receiver(int slot_num)
305 {
306 struct slot_info *s = &slot[slot_num];
307 struct audio_format_info *a;
308
309 if (s->format < 0 || !s->receiver_node)
310 return;
311 a = &afi[s->format];
312 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
313 audio_formats[s->format], slot_num);
314 a->receiver->close(s->receiver_node);
315 free(s->receiver_node);
316 s->receiver_node = NULL;
317 stat_task->current_audio_format_num = -1;
318 }
319
320 static void kill_all_decoders(int error)
321 {
322 int i;
323
324 FOR_EACH_SLOT(i) {
325 struct slot_info *s = &slot[i];
326 if (s->wng && s->wng->task.error >= 0) {
327 PARA_INFO_LOG("deactivating wng in slot %d\n",
328 i);
329 s->wng->task.error = error;
330 }
331 if (s->fc && s->fc->task.error >= 0) {
332 PARA_INFO_LOG("deactivatimg filter chain in slot %d\n", i);
333 s->fc->task.error = error;
334 }
335 if (s->receiver_node && s->receiver_node->task.error >= 0) {
336 PARA_INFO_LOG("deactivating receiver_node in slot %d\n", i);
337 s->receiver_node->task.error = error;
338 }
339 }
340 }
341
342 static int get_empty_slot(void)
343 {
344 int i;
345 struct slot_info *s;
346
347 FOR_EACH_SLOT(i) {
348 s = &slot[i];
349 if (s->format < 0) {
350 clear_slot(i);
351 return i;
352 }
353 if (s->wng || s->receiver_node || s->fc)
354 continue;
355 clear_slot(i);
356 return i;
357 }
358 return -E_NO_MORE_SLOTS;
359 }
360
361 /**
362 * get the number of filters
363 *
364 * \param audio_format_num the number identifying the audio format
365 *
366 * \return the number of filters for the given audio format
367 *
368 * \sa struct filter;
369 */
370 int num_filters(int audio_format_num)
371 {
372 return afi[audio_format_num].num_filters;
373 }
374
375 static void open_filters(int slot_num)
376 {
377 struct slot_info *s = &slot[slot_num];
378 struct audio_format_info *a = &afi[s->format];
379 struct filter_node *fn;
380 int nf = a->num_filters;
381 int i;
382
383 s->fc = NULL;
384 if (!nf)
385 return;
386 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
387 s->fc = para_calloc(sizeof(struct filter_chain));
388 s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_node));
389 s->fc->inbufp = &s->receiver_node->buf;
390 s->fc->in_loaded = &s->receiver_node->loaded;
391 s->fc->input_error = &s->receiver_node->task.error;
392 s->fc->task.pre_select = NULL;
393 s->fc->task.post_select = filter_post_select;
394 s->fc->task.error = 0;
395 s->fc->num_filters = nf;
396
397 s->receiver_node->output_error = &s->fc->task.error;
398 sprintf(s->fc->task.status, "filter chain");
399 FOR_EACH_FILTER_NODE(fn, s->fc, i) {
400 struct filter *f = filters + a->filter_nums[i];
401 fn->filter_num = a->filter_nums[i];
402 fn->conf = a->filter_conf[i];
403 fn->fc = s->fc;
404 fn->loaded = 0;
405 INIT_LIST_HEAD(&fn->callbacks);
406 f->open(fn);
407 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
408 audio_formats[s->format], i, nf, f->name, slot_num);
409 s->fc->outbufp = &fn->buf;
410 s->fc->out_loaded = &fn->loaded;
411 }
412 register_task(&s->fc->task);
413 }
414
415 static void open_writers(int slot_num)
416 {
417 int ret, i;
418 struct slot_info *s = &slot[slot_num];
419 struct audio_format_info *a = &afi[s->format];
420
421 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
422 if (!a->num_writers)
423 s->wng = setup_default_wng();
424 else
425 s->wng = wng_new(a->num_writers);
426 if (s->fc) {
427 s->wng->bufp = s->fc->outbufp;
428 s->wng->loaded = s->fc->out_loaded;
429 s->wng->input_error = &s->fc->task.error;
430 s->wng->channels = &s->fc->channels;
431 s->wng->samplerate = &s->fc->samplerate;
432 s->fc->output_error = &s->wng->task.error;
433 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
434 } else {
435 s->wng->bufp = &s->receiver_node->buf;
436 s->wng->loaded = &s->receiver_node->loaded;
437 s->wng->input_error = &s->receiver_node->task.error;
438 }
439 for (i = 0; i < a->num_writers; i++) {
440 s->wng->writer_nodes[i].conf = a->writer_conf[i];
441 s->wng->writer_nodes[i].writer_num = a->writer_nums[i];
442 }
443 ret = wng_open(s->wng);
444 if (ret < 0)
445 return;
446 s->wstime = *now;
447 s->server_stream_start = stat_task->server_stream_start.tv_sec?
448 stat_task->server_stream_start : *now;
449 s->offset_seconds = stat_task->offset_seconds;
450 s->seconds_total = stat_task->length_seconds;
451 activate_inactive_grab_clients(s->format, s->fc);
452 }
453
454 static int open_receiver(int format)
455 {
456 struct audio_format_info *a = &afi[format];
457 struct slot_info *s;
458 int ret, slot_num;
459 struct receiver_node *rn;
460 const struct timeval restart_delay = {2, 0};
461
462 ret = get_empty_slot();
463 if (ret < 0)
464 goto err;
465 slot_num = ret;
466 s = &slot[slot_num];
467 s->format = format;
468 s->receiver_node = para_calloc(sizeof(struct receiver_node));
469 rn = s->receiver_node;
470 rn->receiver = a->receiver;
471 rn->conf = a->receiver_conf;
472 ret = a->receiver->open(s->receiver_node);
473 if (ret < 0) {
474 free(s->receiver_node);
475 s->receiver_node = NULL;
476 goto err;
477 }
478 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
479 audio_formats[s->format], a->receiver->name, slot_num);
480 rn->task.pre_select = a->receiver->pre_select;
481 rn->task.post_select = a->receiver->post_select;
482 s->rstime = *now;
483 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
484 register_task(&rn->task);
485 ret = 1;
486 err:
487 if (ret < 0)
488 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
489 tv_add(now, &restart_delay, &afi[format].restart_barrier);
490 return ret;
491 }
492
493 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
494 static int receiver_running(int format)
495 {
496 int i, ret = 0;
497
498 FOR_EACH_SLOT(i) {
499 struct slot_info *s = &slot[i];
500 if (s->format != format)
501 continue;
502 if (!s->receiver_node)
503 continue;
504 if (s->receiver_node->task.error >= 0)
505 return 1;
506 ret = -1;
507 }
508 return ret;
509 }
510
511 static void open_current_receiver(struct sched *s)
512 {
513 struct timeval diff;
514 int ret, cafn = stat_task->current_audio_format_num;
515
516 if (cafn < 0 || !stat_task->ct)
517 return;
518 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
519 if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
520 return;
521 ret = receiver_running(cafn);
522 if (ret > 0) /* already running and not eof */
523 return;
524 if (ret < 0) { /* eof */
525 /*
526 * para_server uses a zero start time during the announcement
527 * period, i.e. before it sends the first chunk. Wait until
528 * this period begins to avoid restarting the receiver that
529 * belongs to the file just completed.
530 */
531 if (stat_task->server_stream_start.tv_sec)
532 return;
533 }
534 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
535 /* avoid busy loop */
536 s->timeout = diff;
537 return;
538 }
539 /* start a new receiver */
540 open_receiver(cafn);
541 }
542
543 static unsigned compute_time_diff(const struct timeval *status_time)
544 {
545 struct timeval tmp, diff;
546 static unsigned count;
547 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
548 const struct timeval max_deviation = {0, 500 * 1000};
549 const int time_smooth = 5;
550
551 if (!status_time)
552 return count;
553 sign = tv_diff(status_time, now, &diff);
554 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
555 // sign, sa_time_diff_sign);
556 if (!count) {
557 sa_time_diff_sign = sign;
558 stat_task->sa_time_diff = diff;
559 count++;
560 goto out;
561 }
562 if (count > 5) {
563 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
564 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
565 PARA_WARNING_LOG("time diff jump: %lims\n",
566 s * tv2ms(&tmp));
567 }
568 count++;
569 sa_time_diff_sign = tv_convex_combination(
570 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
571 count > 10? sign : sign * time_smooth, &diff,
572 &tmp);
573 stat_task->sa_time_diff = tmp;
574 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
575 sign > 0? "+" : "-",
576 tv2ms(&diff),
577 sa_time_diff_sign ? "+" : "-",
578 tv2ms(&stat_task->sa_time_diff)
579 );
580 out:
581 stat_task->sa_time_diff_sign = sa_time_diff_sign;
582 return count;
583 }
584
585 static int update_item(int itemnum, char *buf)
586 {
587 long unsigned sec, usec;
588
589 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
590 return 1;
591 free(stat_item_values[itemnum]);
592 stat_item_values[itemnum] = para_strdup(buf);
593 stat_client_write_item(itemnum);
594 switch (itemnum) {
595 case SI_STATUS_FLAGS:
596 stat_task->vss_status = 0;
597 if (strchr(buf, 'N'))
598 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
599 if (strchr(buf, 'P'))
600 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
601 break;
602 case SI_OFFSET:
603 stat_task->offset_seconds = atoi(buf);
604 break;
605 case SI_SECONDS_TOTAL:
606 stat_task->length_seconds = atoi(buf);
607 break;
608 case SI_STREAM_START:
609 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
610 struct timeval a_start, delay;
611 delay.tv_sec = conf.stream_delay_arg / 1000;
612 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
613 stat_task->server_stream_start.tv_sec = sec;
614 stat_task->server_stream_start.tv_usec = usec;
615 if (compute_time_diff(NULL) > 2) {
616 if (stat_task->sa_time_diff_sign < 0)
617 tv_add(&stat_task->server_stream_start,
618 &stat_task->sa_time_diff, &a_start);
619 else
620 tv_diff(&stat_task->server_stream_start,
621 &stat_task->sa_time_diff, &a_start);
622 tv_add(&a_start, &delay, &initial_delay_barrier);
623 }
624 }
625 break;
626 case SI_CURRENT_TIME:
627 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
628 struct timeval tv = {sec, usec};
629 compute_time_diff(&tv);
630 }
631 break;
632 case SI_FORMAT:
633 stat_task->current_audio_format_num
634 = get_audio_format_num(buf);
635 }
636 return 1;
637 }
638
639 static int parse_stream_command(const char *txt, char **cmd)
640 {
641 char *p = strchr(txt, ':');
642 int i;
643
644 if (!p)
645 return -E_MISSING_COLON;
646 p++;
647 FOR_EACH_AUDIO_FORMAT(i) {
648 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
649 continue;
650 *cmd = p;
651 return i;
652 }
653 return -E_UNSUPPORTED_AUDIO_FORMAT;
654 }
655
656 static int add_filter(int format, char *cmdline)
657 {
658 struct audio_format_info *a = &afi[format];
659 int filter_num, nf = a->num_filters;
660
661 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
662 if (filter_num < 0)
663 return filter_num;
664 a->filter_nums[nf] = filter_num;
665 a->num_filters++;
666 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
667 filters[filter_num].name);
668 return filter_num;
669 }
670
671 static int parse_writer_args(void)
672 {
673 int i, ret, nw;
674 char *cmd;
675 struct audio_format_info *a;
676
677 nw = PARA_MAX(1U, conf.writer_given);
678 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
679 FOR_EACH_AUDIO_FORMAT(i) {
680 a = &afi[i];
681 a->writer_conf = para_malloc(nw * sizeof(void *));
682 a->writer_nums = para_malloc(nw * sizeof(int));
683 a->num_writers = 0;
684 }
685 for (i = 0; i < conf.writer_given; i++) {
686 void *wconf;
687 int writer_num;
688 ret = parse_stream_command(conf.writer_arg[i], &cmd);
689 if (ret < 0)
690 goto out;
691 a = &afi[ret];
692 nw = a->num_writers;
693 wconf = check_writer_arg(cmd, &writer_num);
694 if (!wconf) {
695 ret = writer_num;
696 goto out;
697 }
698 a->writer_nums[nw] = writer_num;
699 a->writer_conf[nw] = wconf;
700 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
701 nw, writer_names[writer_num]);
702 a->num_writers++;
703 }
704 ret = 1;
705 out:
706 return ret;
707 }
708
709 static int parse_receiver_args(void)
710 {
711 int i, ret, receiver_num;
712 char *cmd = NULL;
713 struct audio_format_info *a;
714
715 for (i = conf.receiver_given - 1; i >= 0; i--) {
716 char *arg = conf.receiver_arg[i];
717 char *recv_arg = strchr(arg, ':');
718 ret = -E_MISSING_COLON;
719 if (!recv_arg)
720 goto out;
721 *recv_arg = '\0';
722 recv_arg++;
723 ret = get_audio_format_num(arg);
724 if (ret < 0)
725 goto out;
726 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
727 if (!afi[ret].receiver_conf) {
728 ret = -E_RECV_SYNTAX;
729 goto out;
730 }
731 afi[ret].receiver = &receivers[receiver_num];
732 }
733 /* use the first available receiver with no arguments
734 * for those audio formats for which no receiver
735 * was specified
736 */
737 cmd = para_strdup(receivers[0].name);
738 FOR_EACH_AUDIO_FORMAT(i) {
739 a = &afi[i];
740 if (a->receiver_conf)
741 continue;
742 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
743 if (!a->receiver_conf)
744 return -E_RECV_SYNTAX;
745 a->receiver = &receivers[receiver_num];
746 }
747 ret = 1;
748 out:
749 free(cmd);
750 return ret;
751 }
752
753 static int init_default_filters(void)
754 {
755 int i, ret = 1;
756
757 FOR_EACH_AUDIO_FORMAT(i) {
758 struct audio_format_info *a = &afi[i];
759 char *tmp;
760 int j;
761
762 if (a->num_filters)
763 continue; /* no default -- nothing to to */
764 /* add "dec" to audio format name */
765 tmp = make_message("%sdec", audio_formats[i]);
766 for (j = 0; filters[j].name; j++)
767 if (!strcmp(tmp, filters[j].name))
768 break;
769 free(tmp);
770 ret = -E_UNSUPPORTED_FILTER;
771 if (!filters[j].name)
772 goto out;
773 tmp = para_strdup(filters[j].name);
774 ret = add_filter(i, tmp);
775 free(tmp);
776 if (ret < 0)
777 goto out;
778 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
779 filters[j].name);
780 }
781 out:
782 return ret;
783 }
784
785 static int parse_filter_args(void)
786 {
787 int i, ret, nf;
788
789 nf = PARA_MAX(1U, conf.filter_given);
790 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
791 FOR_EACH_AUDIO_FORMAT(i) {
792 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
793 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
794 }
795 if (!conf.no_default_filters_given)
796 return init_default_filters();
797 for (i = 0; i < conf.filter_given; i++) {
798 char *arg = conf.filter_arg[i];
799 char *filter_name = strchr(arg, ':');
800 ret = -E_MISSING_COLON;
801 if (!filter_name)
802 goto out;
803 *filter_name = '\0';
804 filter_name++;
805 ret = get_audio_format_num(arg);
806 if (ret < 0)
807 goto out;
808 ret = add_filter(ret, filter_name);
809 if (ret < 0)
810 goto out;
811 }
812 ret = init_default_filters(); /* use default values for the rest */
813 out:
814 return ret;
815 }
816
817 static int parse_stream_args(void)
818 {
819 int ret;
820
821 ret = parse_receiver_args();
822 if (ret < 0)
823 return ret;
824 ret = parse_filter_args();
825 if (ret < 0)
826 return ret;
827 ret = parse_writer_args();
828 if (ret < 0)
829 return ret;
830 return 1;
831 }
832
833 /* does not unlink socket on errors */
834 static int audiod_get_socket(void)
835 {
836 struct sockaddr_un unix_addr;
837 int ret, fd;
838
839 if (conf.socket_given)
840 socket_name = para_strdup(conf.socket_arg);
841 else {
842 char *hn = para_hostname();
843 socket_name = make_message("/var/paraslash/audiod_socket.%s",
844 hn);
845 free(hn);
846 }
847 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
848 if (conf.force_given)
849 unlink(socket_name);
850 ret = create_local_socket(socket_name, &unix_addr,
851 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
852 if (ret < 0)
853 goto err;
854 fd = ret;
855 if (listen(fd , 5) < 0) {
856 ret = -ERRNO_TO_PARA_ERROR(errno);
857 goto err;
858 }
859 ret = mark_fd_nonblocking(fd);
860 if (ret < 0)
861 goto err;
862 return fd;
863 err:
864 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
865 exit(EXIT_FAILURE);
866 }
867
868 static void signal_pre_select(struct sched *s, struct task *t)
869 {
870 struct signal_task *st = container_of(t, struct signal_task, task);
871 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
872 }
873
874 static void signal_post_select(struct sched *s, struct task *t)
875 {
876 struct signal_task *st = container_of(t, struct signal_task, task);
877
878 if (!FD_ISSET(st->fd, &s->rfds))
879 return;
880
881 st->signum = para_next_signal();
882 switch (st->signum) {
883 case SIGINT:
884 case SIGTERM:
885 case SIGHUP:
886 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
887 clean_exit(EXIT_FAILURE, "caught deadly signal");
888 }
889 }
890
891 static void signal_setup_default(struct signal_task *st)
892 {
893 st->task.pre_select = signal_pre_select;
894 st->task.post_select = signal_post_select;
895 sprintf(st->task.status, "signal task");
896 }
897
898 static void command_pre_select(struct sched *s, struct task *t)
899 {
900 struct command_task *ct = container_of(t, struct command_task, task);
901 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
902 }
903
904 static void command_post_select(struct sched *s, struct task *t)
905 {
906 int ret;
907 struct command_task *ct = container_of(t, struct command_task, task);
908 static struct timeval last_status_dump;
909 struct timeval tmp;
910
911 tv_add(&last_status_dump, &(struct timeval){0, 500 * 1000}, &tmp);
912 if (tv_diff(&tmp, now, NULL) < 0) {
913 audiod_status_dump();
914 last_status_dump = *now;
915 }
916
917 if (!FD_ISSET(ct->fd, &s->rfds))
918 return;
919 ret = handle_connect(ct->fd);
920 if (ret < 0)
921 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
922 }
923
924 static void init_command_task(struct command_task *ct)
925 {
926 ct->task.pre_select = command_pre_select;
927 ct->task.post_select = command_post_select;
928 ct->task.error = 0;
929 ct->fd = audiod_get_socket(); /* doesn't return on errors */
930 sprintf(ct->task.status, "command task");
931 }
932
933 static void close_stat_pipe(void)
934 {
935 if (!stat_task->ct)
936 return;
937 client_close(stat_task->ct);
938 stat_task->ct = NULL;
939 clear_and_dump_items();
940 stat_task->length_seconds = 0;
941 stat_task->offset_seconds = 0;
942 stat_task->vss_status = 0;
943 stat_task->current_audio_format_num = -1;
944 audiod_status_dump();
945 }
946
947 /**
948 * close the connection to para_server and exit
949 *
950 * \param status the exit status which is passed to exit(3)
951 * \param msg the log message
952 *
953 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
954 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
955 * EXIT_FAILURE.
956 *
957 * \sa exit(3)
958 */
959 void __noreturn clean_exit(int status, const char *msg)
960 {
961 PARA_EMERG_LOG("%s\n", msg);
962 if (socket_name)
963 unlink(socket_name);
964 close_stat_pipe();
965 exit(status);
966 }
967
968 /* avoid busy loop if server is down */
969 static void set_stat_task_restart_barrier(unsigned seconds)
970 {
971 struct timeval delay = {seconds, 0};
972 tv_add(now, &delay, &stat_task->restart_barrier);
973 }
974
975 static void try_to_close_slot(int slot_num)
976 {
977 struct slot_info *s = &slot[slot_num];
978
979 if (s->format < 0)
980 return;
981 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
982 return;
983 if (s->fc && s->fc->task.error != -E_TASK_UNREGISTERED)
984 return;
985 if (s->wng && s->wng->task.error != -E_TASK_UNREGISTERED)
986 return;
987 PARA_INFO_LOG("closing slot %d\n", slot_num);
988 wng_close(s->wng);
989 close_filters(s->fc);
990 free(s->fc);
991 close_receiver(slot_num);
992 clear_slot(slot_num);
993 }
994
995 /*
996 * Check if any receivers/filters/writers need to be started and do so if
997 * necessary.
998 */
999 static void start_stop_decoders(struct sched *s)
1000 {
1001 int i;
1002
1003 FOR_EACH_SLOT(i)
1004 try_to_close_slot(i);
1005 if (audiod_status != AUDIOD_ON ||
1006 !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1007 return kill_all_decoders(-E_NOT_PLAYING);
1008 open_current_receiver(s);
1009 FOR_EACH_SLOT(i) {
1010 struct slot_info *sl = &slot[i];
1011 struct audio_format_info *a;
1012 struct timeval diff;
1013
1014 if (sl->format < 0)
1015 continue;
1016 a = &afi[sl->format];
1017 if (!sl->receiver_node)
1018 continue;
1019 if ((!a->num_filters || sl->fc) && sl->wng)
1020 continue; /* everything already started */
1021 if (!a->num_filters) {
1022 if (sl->receiver_node->loaded && !sl->wng) {
1023 open_writers(i);
1024 }
1025 continue;
1026 }
1027 if (sl->receiver_node->loaded && !sl->fc) {
1028 open_filters(i);
1029 continue;
1030 }
1031 if (sl->wng || !sl->fc || !*sl->fc->out_loaded)
1032 continue;
1033 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
1034 open_writers(i);
1035 continue;
1036 }
1037 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
1038 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
1039 s->timeout = diff;
1040 }
1041 }
1042 }
1043
1044
1045 /* restart the client task if necessary */
1046 static void status_pre_select(struct sched *s, struct task *t)
1047 {
1048 struct status_task *st = container_of(t, struct status_task, task);
1049
1050 if (audiod_status == AUDIOD_OFF) {
1051 if (!st->ct)
1052 goto out;
1053 if (st->ct->task.error >= 0) {
1054 st->ct->task.error = -E_AUDIOD_OFF;
1055 goto out;
1056 }
1057 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1058 goto out;
1059 close_stat_pipe();
1060 st->clock_diff_count = conf.clock_diff_count_arg;
1061 goto out;
1062 }
1063 if (st->ct) {
1064 int ret;
1065 if (st->ct->task.error < 0) {
1066 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1067 goto out;
1068 close_stat_pipe();
1069 goto out;
1070 }
1071 if (st->ct->status != CL_RECEIVING)
1072 goto out;
1073 ret = for_each_stat_item(st->ct->buf, st->ct->loaded,
1074 update_item);
1075 if (ret < 0) {
1076 st->ct->task.error = ret;
1077 goto out;
1078 }
1079 if (st->ct->loaded != ret) {
1080 st->last_status_read = *now;
1081 st->ct->loaded = ret;
1082 } else {
1083 struct timeval diff;
1084 tv_diff(now, &st->last_status_read, &diff);
1085 if (diff.tv_sec > 61)
1086 st->ct->task.error = -E_STATUS_TIMEOUT;
1087 }
1088 goto out;
1089 }
1090 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1091 goto out;
1092 if (st->clock_diff_count) { /* get status only one time */
1093 char *argv[] = {"audiod", "--", "stat", "-p", "1", NULL};
1094 int argc = 5;
1095 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1096 st->clock_diff_count--;
1097 client_open(argc, argv, &st->ct, NULL);
1098 set_stat_task_restart_barrier(2);
1099
1100 } else {
1101 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1102 int argc = 4;
1103 client_open(argc, argv, &st->ct, NULL);
1104 set_stat_task_restart_barrier(5);
1105 }
1106 free(stat_item_values[SI_BASENAME]);
1107 stat_item_values[SI_BASENAME] = para_strdup(
1108 "no connection to para_server");
1109 stat_client_write_item(SI_BASENAME);
1110 st->last_status_read = *now;
1111 out:
1112 start_stop_decoders(s);
1113 }
1114
1115 static void init_status_task(struct status_task *st)
1116 {
1117 memset(st, 0, sizeof(struct status_task));
1118 st->task.pre_select = status_pre_select;
1119 st->sa_time_diff_sign = 1;
1120 st->clock_diff_count = conf.clock_diff_count_arg;
1121 st->current_audio_format_num = -1;
1122 sprintf(st->task.status, "status task");
1123 }
1124
1125 static void set_initial_status(void)
1126 {
1127 audiod_status = AUDIOD_ON;
1128 if (!conf.mode_given)
1129 return;
1130 if (!strcmp(conf.mode_arg, "sb")) {
1131 audiod_status = AUDIOD_STANDBY;
1132 return;
1133 }
1134 if (!strcmp(conf.mode_arg, "off")) {
1135 audiod_status = AUDIOD_OFF;
1136 return;
1137 }
1138 if (strcmp(conf.mode_arg, "on"))
1139 PARA_WARNING_LOG("invalid mode\n");
1140 }
1141
1142 __noreturn static void print_help_and_die(void)
1143 {
1144 int d = conf.detailed_help_given;
1145 const char **p = d? audiod_args_info_detailed_help
1146 : audiod_args_info_help;
1147
1148 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1149 AUDIOD_CMDLINE_PARSER_VERSION);
1150 printf_or_die("%s\n\n", audiod_args_info_usage);
1151 for (; *p; p++)
1152 printf_or_die("%s\n", *p);
1153 print_receiver_helps(d);
1154 print_filter_helps(d);
1155 print_writer_helps(d);
1156 exit(0);
1157 }
1158
1159 static void init_colors_or_die(void)
1160 {
1161 int ret, i;
1162
1163 if (!want_colors())
1164 return;
1165 daemon_set_default_log_colors();
1166 daemon_set_flag(DF_COLOR_LOG);
1167 for (i = 0; i < conf.log_color_given; i++) {
1168 ret = daemon_set_log_color(conf.log_color_arg[i]);
1169 if (ret < 0)
1170 exit(EXIT_FAILURE);
1171 }
1172 }
1173
1174 /**
1175 * the main function of para_audiod
1176 *
1177 * \param argc usual argument count
1178 * \param argv usual argument vector
1179 *
1180 * \return EXIT_SUCCESS or EXIT_FAILURE
1181 *
1182 * \sa para_audiod(1)
1183 * */
1184 int main(int argc, char *argv[])
1185 {
1186 int ret, i;
1187 static struct sched s;
1188 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1189 struct audiod_cmdline_parser_params params = {
1190 .override = 0,
1191 .initialize = 1,
1192 .check_required = 0,
1193 .check_ambiguity = 0,
1194 .print_errors = 1
1195 };
1196
1197 valid_fd_012();
1198 if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1199 exit(EXIT_FAILURE);
1200 HANDLE_VERSION_FLAG("audiod", conf);
1201 /* init receivers/filters/writers early to make help work */
1202 recv_init();
1203 filter_init();
1204 writer_init();
1205 if (conf.help_given || conf.detailed_help_given)
1206 print_help_and_die();
1207 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1208 parse_config_or_die();
1209 init_colors_or_die();
1210 init_random_seed_or_die();
1211 daemon_set_flag(DF_LOG_TIME);
1212 daemon_set_flag(DF_LOG_HOSTNAME);
1213 daemon_set_flag(DF_LOG_LL);
1214 if (conf.log_timing_given)
1215 daemon_set_flag(DF_LOG_TIMING);
1216 if (conf.logfile_given) {
1217 daemon_set_logfile(conf.logfile_arg);
1218 daemon_open_log_or_die();
1219 }
1220 ret = parse_stream_args();
1221 if (ret < 0) {
1222 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1223 exit(EXIT_FAILURE);
1224 }
1225 log_welcome("para_audiod");
1226 server_uptime(UPTIME_SET);
1227 set_initial_status();
1228 FOR_EACH_SLOT(i)
1229 clear_slot(i);
1230 init_grabbing();
1231 setup_signal_handling();
1232 signal_setup_default(sig_task);
1233
1234 init_status_task(stat_task);
1235 init_command_task(cmd_task);
1236
1237 if (conf.daemon_given)
1238 daemonize();
1239
1240 register_task(&sig_task->task);
1241 register_task(&cmd_task->task);
1242 register_task(&stat_task->task);
1243 s.default_timeout.tv_sec = 0;
1244 s.default_timeout.tv_usec = 999 * 1000;
1245 ret = schedule(&s);
1246
1247 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1248 return EXIT_FAILURE;
1249 }