2 * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file audiod.c the paraslash's audio daemon */
13 #include "audiod.cmdline.h"
18 #include "grab_client.cmdline.h"
19 #include "grab_client.h"
20 #include "client.cmdline.h"
28 #include "write_common.h"
31 /** define the array of error lists needed by para_audiod */
33 /** define the array containing all supported audio formats */
34 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
36 /** Defines how audiod handles one supported audio format. */
37 struct audio_format_info {
38 /** pointer to the receiver for this audio format */
39 struct receiver *receiver;
40 /** the receiver configuration */
42 /** the number of filters that should be activated for this audio format */
43 unsigned int num_filters;
44 /** pointer to the array of filters to be activated */
45 struct filter **filters;
46 /** pointer to the array of filter configurations */
48 /** the number of filters that should be activated for this audio format */
49 unsigned int num_writers;
50 /** pointer to the array of writers to be activated */
51 struct writer **writers;
52 /** pointer to the array of writer configurations */
54 /** do not start receiver/filters/writer before this time */
55 struct timeval restart_barrier;
59 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
60 * be associated with a receiver/filter/writer triple. This array holds all
61 * information on the status of these slots.
63 * \sa struct slot_info
65 struct slot_info slot[MAX_STREAM_SLOTS];
69 * the current mode of operation of which can be changed by the on/off/cycle
70 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
72 int audiod_status = AUDIOD_ON;
75 * the gengetopt args_info struct that holds information on all command line
78 struct audiod_args_info conf;
80 static char *socket_name;
82 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
84 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
86 static struct status_task status_task_struct;
89 * the task that calls the status command of para_server
91 * \sa struct status_task
93 struct status_task *stat_task = &status_task_struct;
94 static struct timeval initial_delay_barrier;
97 * the task for handling audiod commands
99 * \sa struct task, struct sched
101 struct command_task {
102 /** the local listening socket */
104 /** the associated task structure */
108 /** iterate over all supported audio formats */
109 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
112 * get the audio format number
113 * \param name the name of the audio format
115 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
116 * \a name is not a supported audio format.
118 int get_audio_format_num(char *name)
122 while (para_isspace(*name))
124 FOR_EACH_AUDIO_FORMAT(i)
125 if (!strcmp(name, audio_formats[i]))
127 return -E_UNSUPPORTED_AUDIO_FORMAT;
131 * the log function of para_audiod
134 * \param fmt the format string
136 void para_log(int ll, const char* fmt,...)
142 char str[MAXLINE] = "";
143 static char *hostname;
145 if (ll < conf.loglevel_arg)
148 hostname = para_hostname();
149 outfd = logfile? logfile : stderr;
152 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
153 fprintf(outfd, "%s %s ", str, hostname);
154 if (conf.loglevel_arg <= INFO)
155 fprintf(outfd, "%i ", ll);
157 vfprintf(outfd, fmt, argp);
161 static char *configfile_exists(void)
163 char *home = para_homedir();
164 char *config_file = make_message("%s/.paraslash/audiod.conf",
167 if (file_exists(config_file))
173 static void setup_signal_handling(void)
175 sig_task->fd = para_signal_init();
176 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
177 para_install_sighandler(SIGINT);
178 para_install_sighandler(SIGTERM);
179 para_install_sighandler(SIGHUP);
180 signal(SIGPIPE, SIG_IGN);
183 static void clear_slot(int slot_num)
185 struct slot_info *s = &slot[slot_num];
187 PARA_INFO_LOG("clearing slot %d\n", slot_num);
188 memset(s, 0, sizeof(struct slot_info));
192 static void close_receiver(int slot_num)
194 struct slot_info *s = &slot[slot_num];
195 struct audio_format_info *a;
197 if (s->format < 0 || !s->receiver_node)
200 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
201 audio_formats[s->format], slot_num);
202 a->receiver->close(s->receiver_node);
203 free(s->receiver_node);
204 s->receiver_node = NULL;
207 static void kill_all_decoders(int error)
212 struct slot_info *s = &slot[i];
213 if (s->wng && !s->wng->error) {
214 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
216 wng_unregister(s->wng);
217 s->wng->error = error;
219 if (s->fc && !s->fc->error) {
220 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
221 unregister_task(&s->fc->task);
222 s->fc->error = error;
224 if (s->receiver_node && !s->receiver_node->error) {
225 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
226 unregister_task(&s->receiver_node->task);
227 s->receiver_node->error = error;
232 static int get_empty_slot(void)
243 if (s->wng || s->receiver_node || s->fc)
248 return -E_NO_MORE_SLOTS;
252 * get the number of filters
254 * \param audio_format_num the number identifying the audio format
256 * \return the number of filters for the given audio format
260 int num_filters(int audio_format_num)
262 return afi[audio_format_num].num_filters;
265 static void filter_event_handler(struct task *t)
267 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
268 struct filter_chain *fc = t->private_data;
273 static void open_filters(int slot_num)
275 struct slot_info *s = &slot[slot_num];
276 struct audio_format_info *a = &afi[s->format];
277 int nf = a->num_filters;
283 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
284 s->fc = para_calloc(sizeof(struct filter_chain));
285 INIT_LIST_HEAD(&s->fc->filters);
286 s->fc->inbuf = s->receiver_node->buf;
287 s->fc->in_loaded = &s->receiver_node->loaded;
288 s->fc->input_error = &s->receiver_node->error;
289 s->fc->task.pre_select = filter_pre_select;
290 s->fc->task.event_handler = filter_event_handler;
291 s->fc->task.private_data = s->fc;
294 s->receiver_node->output_error = &s->fc->error;
295 sprintf(s->fc->task.status, "filter chain");
296 for (i = 0; i < nf; i++) {
297 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
298 fn->conf = a->filter_conf[i];
300 fn->filter = a->filters[i];
301 INIT_LIST_HEAD(&fn->callbacks);
302 list_add_tail(&fn->node, &s->fc->filters);
303 fn->filter->open(fn);
304 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
305 audio_formats[s->format], i + 1, nf,
306 fn->filter->name, slot_num);
307 s->fc->outbuf = fn->buf;
308 s->fc->out_loaded = &fn->loaded;
310 register_task(&s->fc->task);
313 static void wng_event_handler(struct task *t)
315 struct writer_node_group *wng = t->private_data;
317 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
322 static void open_writers(int slot_num)
325 struct slot_info *s = &slot[slot_num];
326 struct audio_format_info *a = &afi[s->format];
328 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
330 s->wng = setup_default_wng();
332 s->wng = wng_new(a->num_writers);
334 s->wng->buf = s->fc->outbuf;
335 s->wng->loaded = s->fc->out_loaded;
336 s->wng->input_error = &s->fc->error;
337 s->wng->channels = &s->fc->channels;
338 s->wng->samplerate = &s->fc->samplerate;
339 s->fc->output_error = &s->wng->error;
340 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
342 s->wng->buf = s->receiver_node->buf;
343 s->wng->loaded = &s->receiver_node->loaded;
344 s->wng->input_error = &s->receiver_node->error;
346 s->wng->task.event_handler = wng_event_handler;
347 for (i = 0; i < a->num_writers; i++) {
348 s->wng->writer_nodes[i].conf = a->writer_conf[i];
349 s->wng->writer_nodes[i].writer = a->writers[i];
351 ret = wng_open(s->wng);
353 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
357 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
360 static void rn_event_handler(struct task *t)
362 struct receiver_node *rn = t->private_data;
365 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
368 /* set restart barrier */
370 struct timeval restart_delay = {0, 10 * 1000};
371 if (slot[i].receiver_node != rn)
373 if (rn->error != -E_RECV_EOF)
374 /* don't reconnect immediately on errors */
375 restart_delay.tv_sec = 5;
376 tv_add(now, &restart_delay, &afi[slot[i].format].restart_barrier);
380 static int open_receiver(int format)
382 struct audio_format_info *a = &afi[format];
385 struct receiver_node *rn;
386 const struct timeval restart_delay = {1, 0};
388 ret = get_empty_slot();
394 s->receiver_node = para_calloc(sizeof(struct receiver_node));
395 rn = s->receiver_node;
396 rn->receiver = a->receiver;
397 rn->conf = a->receiver_conf;
398 ret = a->receiver->open(s->receiver_node);
400 free(s->receiver_node);
401 s->receiver_node = NULL;
404 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
405 audio_formats[s->format], a->receiver->name, slot_num);
406 rn->task.private_data = s->receiver_node;
407 rn->task.pre_select = a->receiver->pre_select;
408 rn->task.post_select = a->receiver->post_select;
409 rn->task.event_handler = rn_event_handler;
410 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
411 register_task(&rn->task);
414 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
415 tv_add(now, &restart_delay, &afi[format].restart_barrier);
419 static int receiver_running(int format)
424 struct slot_info *s = &slot[i];
425 if (s->format == format && s->receiver_node
426 && !s->receiver_node->error)
432 static int open_current_receiver(struct sched *s)
436 char *audio_format = stat_task->stat_item_values[SI_FORMAT];
438 if (!audio_format || !stat_task->pcd)
440 i = get_audio_format_num(audio_format + strlen(
441 status_item_list[SI_FORMAT]) + 1);
444 if (receiver_running(i))
446 if (tv_diff(now, &afi[i].restart_barrier, &diff) < 0) {
450 return open_receiver(i) < 0? 0 : 1;
453 static unsigned compute_time_diff(const struct timeval *status_time)
455 struct timeval tmp, diff;
456 static unsigned count;
457 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
458 const struct timeval max_deviation = {0, 500 * 1000};
459 const int time_smooth = 5;
463 sign = tv_diff(status_time, now, &diff);
464 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
465 // sign, sa_time_diff_sign);
467 sa_time_diff_sign = sign;
468 stat_task->sa_time_diff = diff;
473 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
474 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
475 PARA_WARNING_LOG("time diff jump: %lims\n",
479 sa_time_diff_sign = tv_convex_combination(
480 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
481 count > 10? sign : sign * time_smooth, &diff,
483 stat_task->sa_time_diff = tmp;
484 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
487 sa_time_diff_sign ? "+" : "-",
488 tv2ms(&stat_task->sa_time_diff)
491 stat_task->sa_time_diff_sign = sa_time_diff_sign;
495 static int check_stat_line(char *line, __a_unused void *data)
499 long unsigned sec, usec;
502 // PARA_INFO_LOG("line: %s\n", line);
505 itemnum = stat_line_valid(line);
507 PARA_WARNING_LOG("invalid status line: %s\n", line);
510 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
512 tmp = make_message("%s\n", line);
513 stat_client_write(tmp, itemnum);
515 free(stat_task->stat_item_values[itemnum]);
516 stat_task->stat_item_values[itemnum] = para_strdup(line);
517 ilen = strlen(status_item_list[itemnum]);
520 stat_task->playing = strstr(line, "playing")? 1 : 0;
523 stat_task->offset_seconds = atoi(line + ilen + 1);
525 case SI_SECONDS_TOTAL:
526 stat_task->length_seconds = atoi(line + ilen + 1);
528 case SI_STREAM_START:
529 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
530 struct timeval a_start, delay;
531 delay.tv_sec = conf.stream_delay_arg / 1000;
532 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
533 stat_task->server_stream_start.tv_sec = sec;
534 stat_task->server_stream_start.tv_usec = usec;
535 if (compute_time_diff(NULL) > 2) {
536 if (stat_task->sa_time_diff_sign < 0)
537 tv_add(&stat_task->server_stream_start,
538 &stat_task->sa_time_diff, &a_start);
540 tv_diff(&stat_task->server_stream_start,
541 &stat_task->sa_time_diff, &a_start);
542 tv_add(&a_start, &delay, &initial_delay_barrier);
546 case SI_CURRENT_TIME:
547 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
548 struct timeval tv = {sec, usec};
549 compute_time_diff(&tv);
551 if (stat_task->clock_diff_count)
552 stat_task->clock_diff_count--;
558 static void try_to_close_slot(int slot_num)
560 struct slot_info *s = &slot[slot_num];
564 if (s->receiver_node && !s->receiver_node->error)
566 if (s->fc && !s->fc->error)
568 if (s->wng && !s->wng->error)
570 PARA_INFO_LOG("closing slot %d\n", slot_num);
572 close_filters(s->fc);
574 close_receiver(slot_num);
575 clear_slot(slot_num);
579 * Check if any receivers/filters/writers need to be started and do so if
580 * necessary. Since the pre_select function didn't have a chance yet to put
581 * file descriptors into the fd sets given by s, make the upcoming select()
582 * return immediately to avoid a long timeout in case we started something.
584 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
587 struct timeval min_delay = {0, 1};
590 if (audiod_status != AUDIOD_ON || !stat_task->playing)
591 return kill_all_decoders(-E_NOT_PLAYING);
592 if (open_current_receiver(s))
593 s->timeout = min_delay;
595 struct slot_info *sl = &slot[i];
596 struct audio_format_info *a;
601 a = &afi[sl->format];
602 if (!sl->receiver_node)
604 if (!a->num_filters) {
605 if (sl->receiver_node->loaded && !sl->wng) {
607 s->timeout = min_delay;
611 if (sl->receiver_node->loaded && !sl->fc) {
613 s->timeout = min_delay;
616 if (!sl->fc || !*sl->fc->out_loaded || sl->wng)
618 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
620 s->timeout = min_delay;
623 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
624 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
630 static void audiod_post_select(__a_unused struct sched *s,
631 __a_unused struct task *t)
637 try_to_close_slot(i);
640 static void init_audiod_task(struct task *t)
642 t->pre_select = audiod_pre_select;
643 t->post_select = audiod_post_select;
644 t->event_handler = NULL;
646 sprintf(t->status, "audiod task");
649 static int parse_stream_command(const char *txt, char **cmd)
651 char *p = strchr(txt, ':');
655 return -E_MISSING_COLON;
657 FOR_EACH_AUDIO_FORMAT(i) {
658 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
663 return -E_UNSUPPORTED_AUDIO_FORMAT;
666 static int add_filter(int format, char *cmdline)
668 struct audio_format_info *a = &afi[format];
669 int filter_num, nf = a->num_filters;
671 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
674 a->filters[nf] = &filters[filter_num];
676 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
677 a->filters[nf]->name);
681 static int init_writers(void)
685 struct audio_format_info *a;
687 init_supported_writers();
688 nw = PARA_MAX(1, conf.writer_given);
689 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
690 FOR_EACH_AUDIO_FORMAT(i) {
692 a->writer_conf = para_malloc(nw * sizeof(void *));
693 a->writers = para_malloc(nw * sizeof(struct writer *));
696 for (i = 0; i < conf.writer_given; i++) {
699 ret = parse_stream_command(conf.writer_arg[i], &cmd);
704 wconf = check_writer_arg(cmd, &writer_num);
709 a->writers[nw] = &writers[writer_num];
710 a->writer_conf[nw] = wconf;
711 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
712 nw, writer_names[writer_num]);
720 static int init_receivers(void)
722 int i, ret, receiver_num;
724 struct audio_format_info *a;
726 for (i = 0; receivers[i].name; i++) {
727 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
728 receivers[i].init(&receivers[i]);
730 for (i = conf.receiver_given - 1; i >= 0; i--) {
731 char *arg = conf.receiver_arg[i];
732 char *recv_arg = strchr(arg, ':');
733 ret = -E_MISSING_COLON;
738 ret = get_audio_format_num(arg);
741 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
742 if (!afi[ret].receiver_conf) {
743 ret = -E_RECV_SYNTAX;
746 afi[ret].receiver = &receivers[receiver_num];
748 /* use the first available receiver with no arguments
749 * for those audio formats for which no receiver
752 cmd = para_strdup(receivers[0].name);
753 FOR_EACH_AUDIO_FORMAT(i) {
755 if (a->receiver_conf)
757 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
758 if (!a->receiver_conf)
759 return -E_RECV_SYNTAX;
760 a->receiver = &receivers[receiver_num];
768 static int init_default_filters(void)
772 FOR_EACH_AUDIO_FORMAT(i) {
773 struct audio_format_info *a = &afi[i];
778 continue; /* no default -- nothing to to */
779 /* add "dec" to audio format name */
780 tmp = make_message("%sdec", audio_formats[i]);
781 for (j = 0; filters[j].name; j++)
782 if (!strcmp(tmp, filters[j].name))
785 ret = -E_UNSUPPORTED_FILTER;
786 if (!filters[j].name)
788 tmp = para_strdup(filters[j].name);
789 ret = add_filter(i, tmp);
793 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
800 static int init_filters(void)
804 filter_init(filters);
805 nf = PARA_MAX(1, conf.filter_given);
806 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
807 FOR_EACH_AUDIO_FORMAT(i) {
808 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
809 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
811 if (!conf.no_default_filters_given)
812 return init_default_filters();
813 for (i = 0; i < conf.filter_given; i++) {
814 char *arg = conf.filter_arg[i];
815 char *filter_name = strchr(arg, ':');
816 ret = -E_MISSING_COLON;
821 ret = get_audio_format_num(arg);
824 ret = add_filter(ret, filter_name);
828 ret = init_default_filters(); /* use default values for the rest */
833 static int init_stream_io(void)
837 ret = init_writers();
840 ret = init_receivers();
843 ret = init_filters();
849 static int audiod_get_socket(void)
851 struct sockaddr_un unix_addr;
854 if (conf.socket_given)
855 socket_name = para_strdup(conf.socket_arg);
857 char *hn = para_hostname();
858 socket_name = make_message("/var/paraslash/audiod_socket.%s",
862 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
863 if (conf.force_given)
865 fd = create_local_socket(socket_name, &unix_addr,
866 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
868 PARA_EMERG_LOG("can not connect to socket\n");
869 exit(EXIT_FAILURE); /* do not unlink socket */
871 if (listen(fd , 5) < 0) {
872 PARA_EMERG_LOG("can not listen on socket\n");
873 exit(EXIT_FAILURE); /* do not unlink socket */
875 mark_fd_nonblocking(fd);
879 static void signal_event_handler(struct task *t)
881 struct signal_task *st = t->private_data;
883 switch (st->signum) {
887 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
888 clean_exit(EXIT_FAILURE, "caught deadly signal");
892 static void signal_pre_select(struct sched *s, struct task *t)
894 struct signal_task *st = t->private_data;
896 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
899 static void signal_post_select(struct sched *s, struct task *t)
901 struct signal_task *st = t->private_data;
903 if (!FD_ISSET(st->fd, &s->rfds))
905 t->ret = -E_SIGNAL_CAUGHT;
906 st->signum = para_next_signal();
909 static void signal_setup_default(struct signal_task *st)
911 st->task.pre_select = signal_pre_select;
912 st->task.post_select = signal_post_select;
913 st->task.private_data = st;
914 sprintf(st->task.status, "signal task");
917 static void command_pre_select(struct sched *s, struct task *t)
919 struct command_task *ct = t->private_data;
921 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
925 static void command_post_select(struct sched *s, struct task *t)
928 struct command_task *ct = t->private_data;
930 t->ret = 1; /* always successful */
931 audiod_status_dump();
932 if (!FD_ISSET(ct->fd, &s->rfds))
934 ret = handle_connect(ct->fd);
936 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
939 static void init_command_task(struct command_task *ct)
941 ct->task.pre_select = command_pre_select;
942 ct->task.post_select = command_post_select;
943 ct->task.event_handler = NULL;
944 ct->task.private_data = ct;
945 ct->fd = audiod_get_socket(); /* doesn't return on errors */
946 sprintf(ct->task.status, "command task");
949 static void close_stat_pipe(void)
955 client_close(stat_task->pcd);
956 stat_task->pcd = NULL;
957 FOR_EACH_STATUS_ITEM(i) {
958 free(stat_task->stat_item_values[i]);
959 stat_task->stat_item_values[i] = NULL;
962 stat_task->length_seconds = 0;
963 stat_task->offset_seconds = 0;
964 audiod_status_dump();
965 stat_task->playing = 0;
966 stat_task->stat_item_values[SI_BASENAME] = make_message(
967 "%s: no connection to para_server\n",
968 status_item_list[SI_BASENAME]);
969 stat_client_write(stat_task->stat_item_values[SI_BASENAME],
971 if (stat_task->clock_diff_count) {
972 stat_task->clock_diff_barrier.tv_sec = now->tv_sec + 1;
973 stat_task->clock_diff_barrier.tv_usec = now->tv_usec;
978 * close the connection to para_server and exit
980 * \param status the exit status which is passed to exit(3)
981 * \param msg the log message
983 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
984 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
989 void __noreturn clean_exit(int status, const char *msg)
991 PARA_EMERG_LOG("%s\n", msg);
998 /* avoid busy loop if server is down */
999 static void set_stat_task_restart_barrier(void)
1001 struct timeval delay = {5, 0};
1002 tv_add(now, &delay, &stat_task->restart_barrier);
1005 static void client_task_event_handler(__a_unused struct task *t)
1009 if (t->ret == -E_HANDSHAKE_COMPLETE)
1013 if (t->ret != -E_SERVER_EOF)
1014 stat_task->clock_diff_count = conf.clock_diff_count_arg;
1015 set_stat_task_restart_barrier();
1016 FOR_EACH_AUDIO_FORMAT(i)
1017 afi[i].restart_barrier = stat_task->restart_barrier;
1020 static void status_pre_select(struct sched *s, struct task *t)
1022 struct status_task *st = t->private_data;
1025 t->ret = 1; /* always successful */
1026 if (st->pcd || audiod_status == AUDIOD_OFF)
1028 if (!st->clock_diff_count && tv_diff(now, &st->restart_barrier, NULL)
1031 if (st->clock_diff_count) {
1032 char *argv[] = {"audiod", "stat", "1", NULL};
1034 if (tv_diff(now, &st->clock_diff_barrier, NULL) < 0)
1036 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1037 ret = client_open(argc, argv, &st->pcd);
1040 char *argv[] = {"audiod", "stat", NULL};
1042 ret = client_open(argc, argv, &st->pcd);
1044 set_stat_task_restart_barrier();
1047 st->pcd->task.event_handler = client_task_event_handler;
1048 s->timeout.tv_sec = 0;
1049 s->timeout.tv_usec = 1;
1052 static void status_post_select(__a_unused struct sched *s, struct task *t)
1054 struct status_task *st = t->private_data;
1055 unsigned bytes_left;
1058 if (!st->pcd || st->pcd->status != CL_RECEIVING)
1060 if (st->pcd && audiod_status == AUDIOD_OFF) {
1061 unregister_task(&st->pcd->task);
1063 st->clock_diff_count = conf.clock_diff_count_arg;
1066 bytes_left = for_each_line(st->pcd->buf, st->pcd->loaded,
1067 &check_stat_line, NULL);
1068 if (st->pcd->loaded != bytes_left) {
1069 st->last_status_read = *now;
1070 st->pcd->loaded = bytes_left;
1072 struct timeval diff;
1073 tv_diff(now, &st->last_status_read, &diff);
1074 if (diff.tv_sec > 61)
1079 static void init_status_task(struct status_task *st)
1081 memset(st, 0, sizeof(struct status_task));
1082 st->task.pre_select = status_pre_select;
1083 st->task.post_select = status_post_select;
1084 st->task.private_data = st;
1085 st->sa_time_diff_sign = 1;
1086 st->clock_diff_count = conf.clock_diff_count_arg;
1087 sprintf(st->task.status, "status task");
1090 static void set_initial_status(void)
1092 audiod_status = AUDIOD_ON;
1093 if (!conf.mode_given)
1095 if (!strcmp(conf.mode_arg, "sb")) {
1096 audiod_status = AUDIOD_STANDBY;
1099 if (!strcmp(conf.mode_arg, "off")) {
1100 audiod_status = AUDIOD_OFF;
1103 if (strcmp(conf.mode_arg, "on"))
1104 PARA_WARNING_LOG("%s", "invalid mode\n");
1108 * the main function of para_audiod
1110 * \param argc usual argument count
1111 * \param argv usual argument vector
1113 * \return EXIT_SUCCESS or EXIT_FAILURE
1115 * \sa para_audiod(1)
1117 int main(int argc, char *argv[])
1122 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1123 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1126 audiod_cmdline_parser(argc, argv, &conf);
1127 HANDLE_VERSION_FLAG("audiod", conf);
1128 para_drop_privileges(conf.user_arg, conf.group_arg);
1129 config_file = configfile_exists();
1131 struct audiod_cmdline_parser_params params = {
1134 .check_required = 0,
1135 .check_ambiguity = 0
1138 if (audiod_cmdline_parser_config_file(config_file, &conf, ¶ms)) {
1139 PARA_EMERG_LOG("%s", "parse error in config file\n");
1144 if (conf.logfile_given)
1145 logfile = open_log(conf.logfile_arg);
1146 log_welcome("para_audiod", conf.loglevel_arg);
1147 i = init_stream_io();
1149 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1152 server_uptime(UPTIME_SET);
1153 set_initial_status();
1157 setup_signal_handling();
1158 signal_setup_default(sig_task);
1159 sig_task->task.event_handler = signal_event_handler;
1161 init_status_task(stat_task);
1162 init_command_task(cmd_task);
1163 init_audiod_task(audiod_task);
1165 if (conf.daemon_given)
1168 register_task(&sig_task->task);
1169 register_task(&cmd_task->task);
1170 register_task(&stat_task->task);
1171 register_task(audiod_task);
1172 s.default_timeout.tv_sec = 0;
1173 s.default_timeout.tv_usec = 99 * 1000;
1176 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1177 return EXIT_FAILURE;