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 */
11 #include "audiod.cmdline.h"
16 #include "grab_client.cmdline.h"
17 #include "grab_client.h"
18 #include "client.cmdline.h"
26 #include "write_common.h"
30 /** define the array of error lists needed by para_audiod */
32 /** define the array containing all supported audio formats */
33 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
35 /** defines how to handle one supported audio format */
36 struct audio_format_info {
37 /** pointer to the receiver for this audio format */
38 struct receiver *receiver;
39 /** the receiver configuration */
41 /** the number of filters that should be activated for this audio format */
42 unsigned int num_filters;
43 /** pointer to the array of filters to be activated */
44 struct filter **filters;
45 /** pointer to the array of filter configurations */
47 /** the number of filters that should be activated for this audio format */
48 unsigned int num_writers;
49 /** pointer to the array of writers to be activated */
50 struct writer **writers;
51 /** pointer to the array of writer configurations */
53 /** do not start receiver/filters/writer before this time */
54 struct timeval restart_barrier;
58 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
59 * be associated with a receiver/filter/writer triple. This array holds all
60 * information on the status of these slots.
62 * \sa struct slot_info
64 struct slot_info slot[MAX_STREAM_SLOTS];
68 * the current mode of operation of which can be changed by the on/off/cycle
69 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
71 int audiod_status = AUDIOD_ON;
74 * the gengetopt args_info struct that holds information on all command line
77 struct audiod_args_info conf;
79 static char *socket_name;
81 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
83 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
85 static struct status_task status_task_struct;
88 * the task that calls the status command of para_server
90 * \sa struct status_task
92 struct status_task *stat_task = &status_task_struct;
93 static struct timeval initial_delay_barrier;
96 * the task for handling audiod commands
98 * \sa struct task, struct sched
100 struct command_task {
101 /** the local listening socket */
103 /** the associated task structure */
108 * task for signal handling
111 /** the signal pipe */
113 /** the number of the most recent signal */
115 /** the associated task structure */
119 /** iterate over all supported audio formats */
120 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
123 * get the audio format number
124 * \param name the name of the audio format
126 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
127 * \a name is not a supported audio format.
129 int get_audio_format_num(char *name)
132 FOR_EACH_AUDIO_FORMAT(i)
133 if (!strcmp(name, audio_formats[i]))
135 return -E_UNSUPPORTED_AUDIO_FORMAT;
139 * the log function of para_audiod
142 * \param fmt the format string
144 void para_log(int ll, const char* fmt,...)
150 char str[MAXLINE] = "";
151 static char *hostname;
153 if (ll < conf.loglevel_arg)
156 hostname = para_hostname();
157 outfd = logfile? logfile : stderr;
160 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
161 fprintf(outfd, "%s %s ", str, hostname);
162 if (conf.loglevel_arg <= INFO)
163 fprintf(outfd, "%i ", ll);
165 vfprintf(outfd, fmt, argp);
169 static char *configfile_exists(void)
171 static char *config_file;
174 char *home = para_homedir();
175 config_file = make_message("%s/.paraslash/audiod.conf", home);
178 return file_exists(config_file)? config_file : NULL;
181 static void setup_signal_handling(void)
183 sig_task->fd = para_signal_init();
184 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
185 para_install_sighandler(SIGINT);
186 para_install_sighandler(SIGTERM);
187 para_install_sighandler(SIGHUP);
188 signal(SIGPIPE, SIG_IGN);
191 static void clear_slot(int slot_num)
193 struct slot_info *s = &slot[slot_num];
195 PARA_INFO_LOG("clearing slot %d\n", slot_num);
196 memset(s, 0, sizeof(struct slot_info));
200 static void close_receiver(int slot_num)
202 struct slot_info *s = &slot[slot_num];
203 struct audio_format_info *a;
205 if (s->format < 0 || !s->receiver_node)
208 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
209 audio_formats[s->format] , slot_num, s->receiver_node->eof);
210 a->receiver->close(s->receiver_node);
211 free(s->receiver_node);
212 s->receiver_node = NULL;
215 static void kill_all_decoders(void)
220 struct slot_info *s = &slot[i];
221 if (s->wng && !s->wng->eof) {
222 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
224 wng_unregister(s->wng);
227 if (s->fc && !s->fc->eof) {
228 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
229 unregister_task(&s->fc->task);
232 if (s->receiver_node && !s->receiver_node->eof) {
233 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
234 unregister_task(&s->receiver_node->task);
235 s->receiver_node->eof = 1;
240 static int get_empty_slot(void)
251 if (s->wng || s->receiver_node || s->fc)
256 return -E_NO_MORE_SLOTS;
260 * get the number of filters
262 * \param audio_format_num the number identifying the audio format
264 * \return the number of filters for the given audio format
268 int num_filters(int audio_format_num)
270 return afi[audio_format_num].num_filters;
273 static void filter_event_handler(struct task *t)
275 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
276 struct filter_chain *fc = t->private_data;
281 static void open_filters(int slot_num)
283 struct slot_info *s = &slot[slot_num];
284 struct audio_format_info *a = &afi[s->format];
285 int nf = a->num_filters;
291 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
292 s->fc = para_calloc(sizeof(struct filter_chain));
293 INIT_LIST_HEAD(&s->fc->filters);
294 s->fc->inbuf = s->receiver_node->buf;
295 s->fc->in_loaded = &s->receiver_node->loaded;
296 s->fc->input_eof = &s->receiver_node->eof;
297 s->fc->task.pre_select = filter_pre_select;
298 s->fc->task.event_handler = filter_event_handler;
299 s->fc->task.private_data = s->fc;
302 s->receiver_node->output_eof = &s->fc->eof;
303 sprintf(s->fc->task.status, "filter chain");
304 for (i = 0; i < nf; i++) {
305 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
306 fn->conf = a->filter_conf[i];
308 fn->filter = a->filters[i];
309 INIT_LIST_HEAD(&fn->callbacks);
310 list_add_tail(&fn->node, &s->fc->filters);
311 fn->filter->open(fn);
312 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
313 audio_formats[s->format], i + 1, nf,
314 fn->filter->name, slot_num);
315 s->fc->outbuf = fn->buf;
316 s->fc->out_loaded = &fn->loaded;
318 register_task(&s->fc->task);
321 static void wng_event_handler(struct task *t)
323 struct writer_node_group *wng = t->private_data;
325 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
330 static void open_writers(int slot_num)
333 struct slot_info *s = &slot[slot_num];
334 struct audio_format_info *a = &afi[s->format];
336 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
338 s->wng = setup_default_wng();
340 s->wng = wng_new(a->num_writers);
342 s->wng->buf = s->fc->outbuf;
343 s->wng->loaded = s->fc->out_loaded;
344 s->wng->input_eof = &s->fc->eof;
345 s->wng->channels = &s->fc->channels;
346 s->wng->samplerate = &s->fc->samplerate;
347 s->fc->output_eof = &s->wng->eof;
348 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
350 s->wng->buf = s->receiver_node->buf;
351 s->wng->loaded = &s->receiver_node->loaded;
352 s->wng->input_eof = &s->receiver_node->eof;
354 s->wng->task.event_handler = wng_event_handler;
355 for (i = 0; i < a->num_writers; i++) {
356 s->wng->writer_nodes[i].conf = a->writer_conf[i];
357 s->wng->writer_nodes[i].writer = a->writers[i];
359 ret = wng_open(s->wng);
361 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
365 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
368 static void rn_event_handler(struct task *t)
370 struct receiver_node *rn = t->private_data;
371 const struct timeval restart_delay = {0, 10 * 1000};
374 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
377 /* set restart barrier */
379 if (slot[i].receiver_node != rn)
381 tv_add(now, &restart_delay, &afi[slot[i].format].restart_barrier);
385 static int open_receiver(int format)
387 struct audio_format_info *a = &afi[format];
390 struct receiver_node *rn;
391 const struct timeval restart_delay = {1, 0};
393 ret = get_empty_slot();
399 s->receiver_node = para_calloc(sizeof(struct receiver_node));
400 rn = s->receiver_node;
401 rn->receiver = a->receiver;
402 rn->conf = a->receiver_conf;
403 ret = a->receiver->open(s->receiver_node);
405 free(s->receiver_node);
406 s->receiver_node = NULL;
409 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
410 audio_formats[s->format], a->receiver->name, slot_num);
411 rn->task.private_data = s->receiver_node;
412 rn->task.pre_select = a->receiver->pre_select;
413 rn->task.post_select = a->receiver->post_select;
414 rn->task.event_handler = rn_event_handler;
415 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
416 register_task(&rn->task);
419 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
420 tv_add(now, &restart_delay, &afi[format].restart_barrier);
424 static int receiver_running(int format)
429 struct slot_info *s = &slot[i];
430 if (s->format == format && s->receiver_node
431 && !s->receiver_node->eof)
437 static int open_current_receiver(struct sched *s)
441 char *audio_format = stat_task->stat_item_values[SI_FORMAT];
443 if (!audio_format || !stat_task->pcd)
445 i = get_audio_format_num(audio_format + strlen(
446 status_item_list[SI_FORMAT]) + 1);
449 if (receiver_running(i))
451 if (tv_diff(now, &afi[i].restart_barrier, &diff) < 0) {
455 return open_receiver(i) < 0? 0 : 1;
458 static unsigned compute_time_diff(const struct timeval *status_time)
460 struct timeval tmp, diff;
461 static unsigned count;
462 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
463 const struct timeval max_deviation = {0, 500 * 1000};
464 const int time_smooth = 5;
468 sign = tv_diff(status_time, now, &diff);
469 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
470 // sign, sa_time_diff_sign);
472 sa_time_diff_sign = sign;
473 stat_task->sa_time_diff = diff;
478 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
479 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
480 PARA_WARNING_LOG("time diff jump: %lims\n",
484 sa_time_diff_sign = tv_convex_combination(
485 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
486 count > 10? sign : sign * time_smooth, &diff,
488 stat_task->sa_time_diff = tmp;
489 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
492 sa_time_diff_sign ? "+" : "-",
493 tv2ms(&stat_task->sa_time_diff)
496 stat_task->sa_time_diff_sign = sa_time_diff_sign;
500 static void check_stat_line(char *line)
504 long unsigned sec, usec;
507 // PARA_INFO_LOG("line: %s\n", line);
510 itemnum = stat_line_valid(line);
512 PARA_WARNING_LOG("invalid status line: %s\n", line);
515 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
517 tmp = make_message("%s\n", line);
518 stat_client_write(tmp, itemnum);
520 free(stat_task->stat_item_values[itemnum]);
521 stat_task->stat_item_values[itemnum] = para_strdup(line);
522 ilen = strlen(status_item_list[itemnum]);
525 stat_task->playing = strstr(line, "playing")? 1 : 0;
528 stat_task->offset_seconds = atoi(line + ilen + 1);
531 stat_task->length_seconds = atoi(line + ilen + 1);
533 case SI_STREAM_START:
534 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
535 struct timeval a_start, delay;
536 delay.tv_sec = conf.stream_delay_arg / 1000;
537 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
538 stat_task->server_stream_start.tv_sec = sec;
539 stat_task->server_stream_start.tv_usec = usec;
540 if (compute_time_diff(NULL) > 2) {
541 if (stat_task->sa_time_diff_sign < 0)
542 tv_add(&stat_task->server_stream_start,
543 &stat_task->sa_time_diff, &a_start);
545 tv_diff(&stat_task->server_stream_start,
546 &stat_task->sa_time_diff, &a_start);
547 tv_add(&a_start, &delay, &initial_delay_barrier);
551 case SI_CURRENT_TIME:
552 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
553 struct timeval tv = {sec, usec};
554 compute_time_diff(&tv);
556 if (stat_task->clock_diff_count)
557 stat_task->clock_diff_count--;
562 static void try_to_close_slot(int slot_num)
564 struct slot_info *s = &slot[slot_num];
568 if (s->receiver_node && !s->receiver_node->eof)
570 if (s->fc && !s->fc->eof)
572 if (s->wng && !s->wng->eof)
574 PARA_INFO_LOG("closing slot %d \n", slot_num);
576 close_filters(s->fc);
578 close_receiver(slot_num);
579 clear_slot(slot_num);
583 * Check if any receivers/filters/writers need to be started and do so if
584 * neccessary. Since the pre_select function didn't have a chance yet to put
585 * file descriptors into the fd sets given by s, make the upcoming select()
586 * return immediately to avoid a long timeout in case we started something.
588 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
591 struct timeval min_delay = {0, 1};
594 if (audiod_status != AUDIOD_ON || !stat_task->playing)
595 return kill_all_decoders();
596 if (open_current_receiver(s))
597 s->timeout = min_delay;
599 struct slot_info *sl = &slot[i];
600 struct audio_format_info *a;
605 a = &afi[sl->format];
606 if (!sl->receiver_node)
608 if (!a->num_filters) {
609 if (sl->receiver_node->loaded && !sl->wng) {
611 s->timeout = min_delay;
615 if (sl->receiver_node->loaded && !sl->fc) {
617 s->timeout = min_delay;
620 if (!sl->fc || !*sl->fc->out_loaded || sl->wng)
622 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
624 s->timeout = min_delay;
627 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
628 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
634 static void audiod_post_select(__a_unused struct sched *s,
635 __a_unused struct task *t)
641 try_to_close_slot(i);
644 static void init_audiod_task(struct task *t)
646 t->pre_select = audiod_pre_select;
647 t->post_select = audiod_post_select;
648 t->event_handler = NULL;
650 sprintf(t->status, "audiod task");
653 static int parse_stream_command(const char *txt, char **cmd)
655 char *p = strchr(txt, ':');
659 return -E_MISSING_COLON;
661 FOR_EACH_AUDIO_FORMAT(i) {
662 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
667 return -E_UNSUPPORTED_AUDIO_FORMAT;
670 static int add_filter(int format, char *cmdline)
672 struct audio_format_info *a = &afi[format];
673 int filter_num, nf = a->num_filters;
675 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
678 a->filters[nf] = &filters[filter_num];
680 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
681 a->filters[nf]->name);
685 static int init_writers(void)
689 struct audio_format_info *a;
691 init_supported_writers();
692 nw = PARA_MAX(1, conf.writer_given);
693 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
694 FOR_EACH_AUDIO_FORMAT(i) {
696 a->writer_conf = para_malloc(nw * sizeof(void *));
697 a->writers = para_malloc(nw * sizeof(struct writer *));
700 for (i = 0; i < conf.writer_given; i++) {
703 ret = parse_stream_command(conf.writer_arg[i], &cmd);
708 wconf = check_writer_arg(cmd, &writer_num);
713 a->writers[nw] = &writers[writer_num];
714 a->writer_conf[nw] = wconf;
715 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
716 nw, writer_names[writer_num]);
724 static int init_receivers(void)
726 int i, ret, receiver_num;
728 struct audio_format_info *a;
730 for (i = 0; receivers[i].name; i++) {
731 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
732 receivers[i].init(&receivers[i]);
734 for (i = conf.receiver_given - 1; i >= 0; i--) {
735 char *arg = conf.receiver_arg[i];
736 char *recv_arg = strchr(arg, ':');
737 ret = -E_MISSING_COLON;
742 ret = get_audio_format_num(arg);
745 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
746 if (!afi[ret].receiver_conf) {
747 ret = -E_RECV_SYNTAX;
750 afi[ret].receiver = &receivers[receiver_num];
752 /* use the first available receiver with no arguments
753 * for those audio formats for which no receiver
756 cmd = para_strdup(receivers[0].name);
757 FOR_EACH_AUDIO_FORMAT(i) {
759 if (a->receiver_conf)
761 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
762 if (!a->receiver_conf)
763 return -E_RECV_SYNTAX;
764 a->receiver = &receivers[receiver_num];
772 static int init_default_filters(void)
776 FOR_EACH_AUDIO_FORMAT(i) {
777 struct audio_format_info *a = &afi[i];
782 continue; /* no default -- nothing to to */
783 /* add "dec" to audio format name */
784 tmp = make_message("%sdec", audio_formats[i]);
785 for (j = 0; filters[j].name; j++)
786 if (!strcmp(tmp, filters[j].name))
789 ret = -E_UNSUPPORTED_FILTER;
790 if (!filters[j].name)
792 tmp = para_strdup(filters[j].name);
793 ret = add_filter(i, tmp);
797 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
804 static int init_filters(void)
808 filter_init(filters);
809 nf = PARA_MAX(1, conf.filter_given);
810 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
811 FOR_EACH_AUDIO_FORMAT(i) {
812 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
813 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
815 if (!conf.no_default_filters_given)
816 return init_default_filters();
817 for (i = 0; i < conf.filter_given; i++) {
818 char *arg = conf.filter_arg[i];
819 char *filter_name = strchr(arg, ':');
820 ret = -E_MISSING_COLON;
825 ret = get_audio_format_num(arg);
828 ret = add_filter(ret, filter_name);
832 ret = init_default_filters(); /* use default values for the rest */
837 static int init_stream_io(void)
841 ret = init_writers();
844 ret = init_receivers();
847 ret = init_filters();
853 static int audiod_get_socket(void)
855 struct sockaddr_un unix_addr;
858 if (conf.socket_given)
859 socket_name = para_strdup(conf.socket_arg);
861 char *hn = para_hostname();
862 socket_name = make_message("/var/paraslash/audiod_socket.%s",
866 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
867 if (conf.force_given)
869 fd = create_local_socket(socket_name, &unix_addr,
870 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
872 PARA_EMERG_LOG("%s", "can not connect to socket\n");
873 exit(EXIT_FAILURE); /* do not unlink socket */
875 if (listen(fd , 5) < 0) {
876 PARA_EMERG_LOG("%s", "can not listen on socket\n");
877 exit(EXIT_FAILURE); /* do not unlink socket */
879 mark_fd_nonblock(fd);
883 static void signal_event_handler(struct task *t)
885 struct signal_task *st = t->private_data;
887 switch (st->signum) {
891 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
892 clean_exit(EXIT_FAILURE, "caught deadly signal");
896 static void signal_pre_select(struct sched *s, struct task *t)
898 struct signal_task *st = t->private_data;
900 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
903 static void signal_post_select(struct sched *s, struct task *t)
905 struct signal_task *st = t->private_data;
907 if (!FD_ISSET(st->fd, &s->rfds))
909 t->ret = -E_SIGNAL_CAUGHT;
910 st->signum = para_next_signal();
913 static void signal_setup_default(struct signal_task *st)
915 st->task.pre_select = signal_pre_select;
916 st->task.post_select = signal_post_select;
917 st->task.private_data = st;
918 sprintf(st->task.status, "signal task");
921 static void command_pre_select(struct sched *s, struct task *t)
923 struct command_task *ct = t->private_data;
925 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
929 static void command_post_select(struct sched *s, struct task *t)
932 struct command_task *ct = t->private_data;
934 t->ret = 1; /* always successful */
935 audiod_status_dump();
936 if (!FD_ISSET(ct->fd, &s->rfds))
938 ret = handle_connect(ct->fd);
940 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
943 static void init_command_task(struct command_task *ct)
945 ct->task.pre_select = command_pre_select;
946 ct->task.post_select = command_post_select;
947 ct->task.event_handler = NULL;
948 ct->task.private_data = ct;
949 ct->fd = audiod_get_socket(); /* doesn't return on errors */
950 sprintf(ct->task.status, "command task");
953 static void close_stat_pipe(void)
959 client_close(stat_task->pcd);
960 stat_task->pcd = NULL;
961 for (i = 0; i < NUM_STAT_ITEMS; i++) {
962 free(stat_task->stat_item_values[i]);
963 stat_task->stat_item_values[i] = NULL;
966 stat_task->length_seconds = 0;
967 stat_task->offset_seconds = 0;
968 audiod_status_dump();
969 stat_task->playing = 0;
970 stat_task->stat_item_values[SI_STATUS_BAR] = make_message(
971 "%s:no connection to para_server\n",
972 status_item_list[SI_STATUS_BAR]);
973 stat_client_write(stat_task->stat_item_values[SI_STATUS_BAR],
975 if (stat_task->clock_diff_count) {
976 stat_task->clock_diff_barrier.tv_sec = now->tv_sec + 1;
977 stat_task->clock_diff_barrier.tv_usec = now->tv_usec;
982 * close the connection to para_server and exit
984 * \param status the exit status which is passed to exit(3)
985 * \param msg the log message
987 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
988 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
993 void __noreturn clean_exit(int status, const char *msg)
995 PARA_EMERG_LOG("%s\n", msg);
1002 /* avoid busy loop if server is down */
1003 static void set_stat_task_restart_barrier(void)
1005 struct timeval delay = {5, 0};
1006 tv_add(now, &delay, &stat_task->restart_barrier);
1009 static void client_task_event_handler(__a_unused struct task *t)
1013 if (t->ret == -E_HANDSHAKE_COMPLETE)
1017 if (t->ret != -E_SERVER_EOF)
1018 stat_task->clock_diff_count = conf.clock_diff_count_arg;
1019 set_stat_task_restart_barrier();
1020 FOR_EACH_AUDIO_FORMAT(i)
1021 afi[i].restart_barrier = stat_task->restart_barrier;
1024 static void status_pre_select(struct sched *s, struct task *t)
1026 struct status_task *st = t->private_data;
1029 t->ret = 1; /* always successful */
1030 if (st->pcd || audiod_status == AUDIOD_OFF)
1032 if (!st->clock_diff_count && tv_diff(now, &st->restart_barrier, NULL)
1035 if (st->clock_diff_count) {
1036 char *argv[] = {"audiod", "stat", "1", NULL};
1038 if (tv_diff(now, &st->clock_diff_barrier, NULL) < 0)
1040 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1041 ret = client_open(argc, argv, &st->pcd);
1044 char *argv[] = {"audiod", "stat", NULL};
1046 ret = client_open(argc, argv, &st->pcd);
1048 set_stat_task_restart_barrier();
1051 st->pcd->task.event_handler = client_task_event_handler;
1052 s->timeout.tv_sec = 0;
1053 s->timeout.tv_usec = 1;
1056 static void status_post_select(__a_unused struct sched *s, struct task *t)
1058 struct status_task *st = t->private_data;
1059 unsigned bytes_left;
1062 if (!st->pcd || st->pcd->status != CL_RECEIVING)
1064 if (st->pcd && audiod_status == AUDIOD_OFF) {
1065 unregister_task(&st->pcd->task);
1067 st->clock_diff_count = conf.clock_diff_count_arg;
1070 bytes_left = for_each_line(st->pcd->buf, st->pcd->loaded,
1072 if (st->pcd->loaded != bytes_left) {
1073 st->last_status_read = *now;
1074 st->pcd->loaded = bytes_left;
1076 struct timeval diff;
1077 tv_diff(now, &st->last_status_read, &diff);
1078 if (diff.tv_sec > 61)
1083 static void init_status_task(struct status_task *st)
1085 memset(st, 0, sizeof(struct status_task));
1086 st->task.pre_select = status_pre_select;
1087 st->task.post_select = status_post_select;
1088 st->task.private_data = st;
1089 st->sa_time_diff_sign = 1;
1090 st->clock_diff_count = conf.clock_diff_count_arg;
1091 sprintf(st->task.status, "status task");
1094 static void set_initial_status(void)
1096 audiod_status = AUDIOD_ON;
1097 if (!conf.mode_given)
1099 if (!strcmp(conf.mode_arg, "sb")) {
1100 audiod_status = AUDIOD_STANDBY;
1103 if (!strcmp(conf.mode_arg, "off")) {
1104 audiod_status = AUDIOD_OFF;
1107 if (strcmp(conf.mode_arg, "on"))
1108 PARA_WARNING_LOG("%s", "invalid mode\n");
1112 * the main function of para_audiod
1114 * \param argc usual argument count
1115 * \param argv usual argument vector
1117 * \return EXIT_SUCCESS or EXIT_FAILURE
1119 * \sa para_audiod(1)
1121 int main(int argc, char *argv[])
1126 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1127 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1130 audiod_cmdline_parser(argc, argv, &conf);
1131 HANDLE_VERSION_FLAG("audiod", conf);
1132 para_drop_privileges(conf.user_arg, conf.group_arg);
1133 cf = configfile_exists();
1135 struct audiod_cmdline_parser_params params = {
1138 .check_required = 0,
1139 .check_ambiguity = 0
1142 if (audiod_cmdline_parser_config_file(cf, &conf, ¶ms)) {
1143 PARA_EMERG_LOG("%s", "parse error in config file\n");
1147 if (conf.logfile_given)
1148 logfile = open_log(conf.logfile_arg);
1149 log_welcome("para_audiod", conf.loglevel_arg);
1150 i = init_stream_io();
1152 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1155 server_uptime(UPTIME_SET);
1156 set_initial_status();
1160 setup_signal_handling();
1161 signal_setup_default(sig_task);
1162 sig_task->task.event_handler = signal_event_handler;
1164 init_status_task(stat_task);
1165 init_command_task(cmd_task);
1166 init_audiod_task(audiod_task);
1168 if (conf.daemon_given)
1171 register_task(&sig_task->task);
1172 register_task(&cmd_task->task);
1173 register_task(&stat_task->task);
1174 register_task(audiod_task);
1175 s.default_timeout.tv_sec = 0;
1176 s.default_timeout.tv_usec = 99 * 1000;
1179 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1180 return EXIT_FAILURE;