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 */
107 /** iterate over all supported audio formats */
108 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
111 * get the audio format number
112 * \param name the name of the audio format
114 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
115 * \a name is not a supported audio format.
117 int get_audio_format_num(char *name)
120 FOR_EACH_AUDIO_FORMAT(i)
121 if (!strcmp(name, audio_formats[i]))
123 return -E_UNSUPPORTED_AUDIO_FORMAT;
127 * the log function of para_audiod
130 * \param fmt the format string
132 void para_log(int ll, const char* fmt,...)
138 char str[MAXLINE] = "";
139 static char *hostname;
141 if (ll < conf.loglevel_arg)
144 hostname = para_hostname();
145 outfd = logfile? logfile : stderr;
148 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
149 fprintf(outfd, "%s %s ", str, hostname);
150 if (conf.loglevel_arg <= INFO)
151 fprintf(outfd, "%i ", ll);
153 vfprintf(outfd, fmt, argp);
157 static char *configfile_exists(void)
159 char *home = para_homedir();
160 char *config_file = make_message("%s/.paraslash/audiod.conf",
163 if (file_exists(config_file))
169 static void setup_signal_handling(void)
171 sig_task->fd = para_signal_init();
172 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
173 para_install_sighandler(SIGINT);
174 para_install_sighandler(SIGTERM);
175 para_install_sighandler(SIGHUP);
176 signal(SIGPIPE, SIG_IGN);
179 static void clear_slot(int slot_num)
181 struct slot_info *s = &slot[slot_num];
183 PARA_INFO_LOG("clearing slot %d\n", slot_num);
184 memset(s, 0, sizeof(struct slot_info));
188 static void close_receiver(int slot_num)
190 struct slot_info *s = &slot[slot_num];
191 struct audio_format_info *a;
193 if (s->format < 0 || !s->receiver_node)
196 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
197 audio_formats[s->format] , slot_num, s->receiver_node->eof);
198 a->receiver->close(s->receiver_node);
199 free(s->receiver_node);
200 s->receiver_node = NULL;
203 static void kill_all_decoders(void)
208 struct slot_info *s = &slot[i];
209 if (s->wng && !s->wng->eof) {
210 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
212 wng_unregister(s->wng);
215 if (s->fc && !s->fc->eof) {
216 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
217 unregister_task(&s->fc->task);
220 if (s->receiver_node && !s->receiver_node->eof) {
221 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
222 unregister_task(&s->receiver_node->task);
223 s->receiver_node->eof = 1;
228 static int get_empty_slot(void)
239 if (s->wng || s->receiver_node || s->fc)
244 return -E_NO_MORE_SLOTS;
248 * get the number of filters
250 * \param audio_format_num the number identifying the audio format
252 * \return the number of filters for the given audio format
256 int num_filters(int audio_format_num)
258 return afi[audio_format_num].num_filters;
261 static void filter_event_handler(struct task *t)
263 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
264 struct filter_chain *fc = t->private_data;
269 static void open_filters(int slot_num)
271 struct slot_info *s = &slot[slot_num];
272 struct audio_format_info *a = &afi[s->format];
273 int nf = a->num_filters;
279 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
280 s->fc = para_calloc(sizeof(struct filter_chain));
281 INIT_LIST_HEAD(&s->fc->filters);
282 s->fc->inbuf = s->receiver_node->buf;
283 s->fc->in_loaded = &s->receiver_node->loaded;
284 s->fc->input_eof = &s->receiver_node->eof;
285 s->fc->task.pre_select = filter_pre_select;
286 s->fc->task.event_handler = filter_event_handler;
287 s->fc->task.private_data = s->fc;
290 s->receiver_node->output_eof = &s->fc->eof;
291 sprintf(s->fc->task.status, "filter chain");
292 for (i = 0; i < nf; i++) {
293 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
294 fn->conf = a->filter_conf[i];
296 fn->filter = a->filters[i];
297 INIT_LIST_HEAD(&fn->callbacks);
298 list_add_tail(&fn->node, &s->fc->filters);
299 fn->filter->open(fn);
300 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
301 audio_formats[s->format], i + 1, nf,
302 fn->filter->name, slot_num);
303 s->fc->outbuf = fn->buf;
304 s->fc->out_loaded = &fn->loaded;
306 register_task(&s->fc->task);
309 static void wng_event_handler(struct task *t)
311 struct writer_node_group *wng = t->private_data;
313 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
318 static void open_writers(int slot_num)
321 struct slot_info *s = &slot[slot_num];
322 struct audio_format_info *a = &afi[s->format];
324 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
326 s->wng = setup_default_wng();
328 s->wng = wng_new(a->num_writers);
330 s->wng->buf = s->fc->outbuf;
331 s->wng->loaded = s->fc->out_loaded;
332 s->wng->input_eof = &s->fc->eof;
333 s->wng->channels = &s->fc->channels;
334 s->wng->samplerate = &s->fc->samplerate;
335 s->fc->output_eof = &s->wng->eof;
336 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
338 s->wng->buf = s->receiver_node->buf;
339 s->wng->loaded = &s->receiver_node->loaded;
340 s->wng->input_eof = &s->receiver_node->eof;
342 s->wng->task.event_handler = wng_event_handler;
343 for (i = 0; i < a->num_writers; i++) {
344 s->wng->writer_nodes[i].conf = a->writer_conf[i];
345 s->wng->writer_nodes[i].writer = a->writers[i];
347 ret = wng_open(s->wng);
349 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
353 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
356 static void rn_event_handler(struct task *t)
358 struct receiver_node *rn = t->private_data;
359 const struct timeval restart_delay = {0, 10 * 1000};
362 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
365 /* set restart barrier */
367 if (slot[i].receiver_node != rn)
369 tv_add(now, &restart_delay, &afi[slot[i].format].restart_barrier);
373 static int open_receiver(int format)
375 struct audio_format_info *a = &afi[format];
378 struct receiver_node *rn;
379 const struct timeval restart_delay = {1, 0};
381 ret = get_empty_slot();
387 s->receiver_node = para_calloc(sizeof(struct receiver_node));
388 rn = s->receiver_node;
389 rn->receiver = a->receiver;
390 rn->conf = a->receiver_conf;
391 ret = a->receiver->open(s->receiver_node);
393 free(s->receiver_node);
394 s->receiver_node = NULL;
397 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
398 audio_formats[s->format], a->receiver->name, slot_num);
399 rn->task.private_data = s->receiver_node;
400 rn->task.pre_select = a->receiver->pre_select;
401 rn->task.post_select = a->receiver->post_select;
402 rn->task.event_handler = rn_event_handler;
403 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
404 register_task(&rn->task);
407 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
408 tv_add(now, &restart_delay, &afi[format].restart_barrier);
412 static int receiver_running(int format)
417 struct slot_info *s = &slot[i];
418 if (s->format == format && s->receiver_node
419 && !s->receiver_node->eof)
425 static int open_current_receiver(struct sched *s)
429 char *audio_format = stat_task->stat_item_values[SI_FORMAT];
431 if (!audio_format || !stat_task->pcd)
433 i = get_audio_format_num(audio_format + strlen(
434 status_item_list[SI_FORMAT]) + 1);
437 if (receiver_running(i))
439 if (tv_diff(now, &afi[i].restart_barrier, &diff) < 0) {
443 return open_receiver(i) < 0? 0 : 1;
446 static unsigned compute_time_diff(const struct timeval *status_time)
448 struct timeval tmp, diff;
449 static unsigned count;
450 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
451 const struct timeval max_deviation = {0, 500 * 1000};
452 const int time_smooth = 5;
456 sign = tv_diff(status_time, now, &diff);
457 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
458 // sign, sa_time_diff_sign);
460 sa_time_diff_sign = sign;
461 stat_task->sa_time_diff = diff;
466 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
467 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
468 PARA_WARNING_LOG("time diff jump: %lims\n",
472 sa_time_diff_sign = tv_convex_combination(
473 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
474 count > 10? sign : sign * time_smooth, &diff,
476 stat_task->sa_time_diff = tmp;
477 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
480 sa_time_diff_sign ? "+" : "-",
481 tv2ms(&stat_task->sa_time_diff)
484 stat_task->sa_time_diff_sign = sa_time_diff_sign;
488 static int check_stat_line(char *line, __a_unused void *data)
492 long unsigned sec, usec;
495 // PARA_INFO_LOG("line: %s\n", line);
498 itemnum = stat_line_valid(line);
500 PARA_WARNING_LOG("invalid status line: %s\n", line);
503 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
505 tmp = make_message("%s\n", line);
506 stat_client_write(tmp, itemnum);
508 free(stat_task->stat_item_values[itemnum]);
509 stat_task->stat_item_values[itemnum] = para_strdup(line);
510 ilen = strlen(status_item_list[itemnum]);
513 stat_task->playing = strstr(line, "playing")? 1 : 0;
516 stat_task->offset_seconds = atoi(line + ilen + 1);
519 stat_task->length_seconds = atoi(line + ilen + 1);
521 case SI_STREAM_START:
522 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
523 struct timeval a_start, delay;
524 delay.tv_sec = conf.stream_delay_arg / 1000;
525 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
526 stat_task->server_stream_start.tv_sec = sec;
527 stat_task->server_stream_start.tv_usec = usec;
528 if (compute_time_diff(NULL) > 2) {
529 if (stat_task->sa_time_diff_sign < 0)
530 tv_add(&stat_task->server_stream_start,
531 &stat_task->sa_time_diff, &a_start);
533 tv_diff(&stat_task->server_stream_start,
534 &stat_task->sa_time_diff, &a_start);
535 tv_add(&a_start, &delay, &initial_delay_barrier);
539 case SI_CURRENT_TIME:
540 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
541 struct timeval tv = {sec, usec};
542 compute_time_diff(&tv);
544 if (stat_task->clock_diff_count)
545 stat_task->clock_diff_count--;
551 static void try_to_close_slot(int slot_num)
553 struct slot_info *s = &slot[slot_num];
557 if (s->receiver_node && !s->receiver_node->eof)
559 if (s->fc && !s->fc->eof)
561 if (s->wng && !s->wng->eof)
563 PARA_INFO_LOG("closing slot %d \n", slot_num);
565 close_filters(s->fc);
567 close_receiver(slot_num);
568 clear_slot(slot_num);
572 * Check if any receivers/filters/writers need to be started and do so if
573 * neccessary. Since the pre_select function didn't have a chance yet to put
574 * file descriptors into the fd sets given by s, make the upcoming select()
575 * return immediately to avoid a long timeout in case we started something.
577 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
580 struct timeval min_delay = {0, 1};
583 if (audiod_status != AUDIOD_ON || !stat_task->playing)
584 return kill_all_decoders();
585 if (open_current_receiver(s))
586 s->timeout = min_delay;
588 struct slot_info *sl = &slot[i];
589 struct audio_format_info *a;
594 a = &afi[sl->format];
595 if (!sl->receiver_node)
597 if (!a->num_filters) {
598 if (sl->receiver_node->loaded && !sl->wng) {
600 s->timeout = min_delay;
604 if (sl->receiver_node->loaded && !sl->fc) {
606 s->timeout = min_delay;
609 if (!sl->fc || !*sl->fc->out_loaded || sl->wng)
611 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
613 s->timeout = min_delay;
616 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
617 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
623 static void audiod_post_select(__a_unused struct sched *s,
624 __a_unused struct task *t)
630 try_to_close_slot(i);
633 static void init_audiod_task(struct task *t)
635 t->pre_select = audiod_pre_select;
636 t->post_select = audiod_post_select;
637 t->event_handler = NULL;
639 sprintf(t->status, "audiod task");
642 static int parse_stream_command(const char *txt, char **cmd)
644 char *p = strchr(txt, ':');
648 return -E_MISSING_COLON;
650 FOR_EACH_AUDIO_FORMAT(i) {
651 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
656 return -E_UNSUPPORTED_AUDIO_FORMAT;
659 static int add_filter(int format, char *cmdline)
661 struct audio_format_info *a = &afi[format];
662 int filter_num, nf = a->num_filters;
664 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
667 a->filters[nf] = &filters[filter_num];
669 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
670 a->filters[nf]->name);
674 static int init_writers(void)
678 struct audio_format_info *a;
680 init_supported_writers();
681 nw = PARA_MAX(1, conf.writer_given);
682 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
683 FOR_EACH_AUDIO_FORMAT(i) {
685 a->writer_conf = para_malloc(nw * sizeof(void *));
686 a->writers = para_malloc(nw * sizeof(struct writer *));
689 for (i = 0; i < conf.writer_given; i++) {
692 ret = parse_stream_command(conf.writer_arg[i], &cmd);
697 wconf = check_writer_arg(cmd, &writer_num);
702 a->writers[nw] = &writers[writer_num];
703 a->writer_conf[nw] = wconf;
704 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
705 nw, writer_names[writer_num]);
713 static int init_receivers(void)
715 int i, ret, receiver_num;
717 struct audio_format_info *a;
719 for (i = 0; receivers[i].name; i++) {
720 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
721 receivers[i].init(&receivers[i]);
723 for (i = conf.receiver_given - 1; i >= 0; i--) {
724 char *arg = conf.receiver_arg[i];
725 char *recv_arg = strchr(arg, ':');
726 ret = -E_MISSING_COLON;
731 ret = get_audio_format_num(arg);
734 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
735 if (!afi[ret].receiver_conf) {
736 ret = -E_RECV_SYNTAX;
739 afi[ret].receiver = &receivers[receiver_num];
741 /* use the first available receiver with no arguments
742 * for those audio formats for which no receiver
745 cmd = para_strdup(receivers[0].name);
746 FOR_EACH_AUDIO_FORMAT(i) {
748 if (a->receiver_conf)
750 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
751 if (!a->receiver_conf)
752 return -E_RECV_SYNTAX;
753 a->receiver = &receivers[receiver_num];
761 static int init_default_filters(void)
765 FOR_EACH_AUDIO_FORMAT(i) {
766 struct audio_format_info *a = &afi[i];
771 continue; /* no default -- nothing to to */
772 /* add "dec" to audio format name */
773 tmp = make_message("%sdec", audio_formats[i]);
774 for (j = 0; filters[j].name; j++)
775 if (!strcmp(tmp, filters[j].name))
778 ret = -E_UNSUPPORTED_FILTER;
779 if (!filters[j].name)
781 tmp = para_strdup(filters[j].name);
782 ret = add_filter(i, tmp);
786 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
793 static int init_filters(void)
797 filter_init(filters);
798 nf = PARA_MAX(1, conf.filter_given);
799 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
800 FOR_EACH_AUDIO_FORMAT(i) {
801 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
802 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
804 if (!conf.no_default_filters_given)
805 return init_default_filters();
806 for (i = 0; i < conf.filter_given; i++) {
807 char *arg = conf.filter_arg[i];
808 char *filter_name = strchr(arg, ':');
809 ret = -E_MISSING_COLON;
814 ret = get_audio_format_num(arg);
817 ret = add_filter(ret, filter_name);
821 ret = init_default_filters(); /* use default values for the rest */
826 static int init_stream_io(void)
830 ret = init_writers();
833 ret = init_receivers();
836 ret = init_filters();
842 static int audiod_get_socket(void)
844 struct sockaddr_un unix_addr;
847 if (conf.socket_given)
848 socket_name = para_strdup(conf.socket_arg);
850 char *hn = para_hostname();
851 socket_name = make_message("/var/paraslash/audiod_socket.%s",
855 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
856 if (conf.force_given)
858 fd = create_local_socket(socket_name, &unix_addr,
859 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
861 PARA_EMERG_LOG("can not connect to socket\n");
862 exit(EXIT_FAILURE); /* do not unlink socket */
864 if (listen(fd , 5) < 0) {
865 PARA_EMERG_LOG("can not listen on socket\n");
866 exit(EXIT_FAILURE); /* do not unlink socket */
868 mark_fd_nonblock(fd);
872 static void signal_event_handler(struct task *t)
874 struct signal_task *st = t->private_data;
876 switch (st->signum) {
880 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
881 clean_exit(EXIT_FAILURE, "caught deadly signal");
885 static void signal_pre_select(struct sched *s, struct task *t)
887 struct signal_task *st = t->private_data;
889 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
892 static void signal_post_select(struct sched *s, struct task *t)
894 struct signal_task *st = t->private_data;
896 if (!FD_ISSET(st->fd, &s->rfds))
898 t->ret = -E_SIGNAL_CAUGHT;
899 st->signum = para_next_signal();
902 static void signal_setup_default(struct signal_task *st)
904 st->task.pre_select = signal_pre_select;
905 st->task.post_select = signal_post_select;
906 st->task.private_data = st;
907 sprintf(st->task.status, "signal task");
910 static void command_pre_select(struct sched *s, struct task *t)
912 struct command_task *ct = t->private_data;
914 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
918 static void command_post_select(struct sched *s, struct task *t)
921 struct command_task *ct = t->private_data;
923 t->ret = 1; /* always successful */
924 audiod_status_dump();
925 if (!FD_ISSET(ct->fd, &s->rfds))
927 ret = handle_connect(ct->fd);
929 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
932 static void init_command_task(struct command_task *ct)
934 ct->task.pre_select = command_pre_select;
935 ct->task.post_select = command_post_select;
936 ct->task.event_handler = NULL;
937 ct->task.private_data = ct;
938 ct->fd = audiod_get_socket(); /* doesn't return on errors */
939 sprintf(ct->task.status, "command task");
942 static void close_stat_pipe(void)
948 client_close(stat_task->pcd);
949 stat_task->pcd = NULL;
950 for (i = 0; i < NUM_STAT_ITEMS; i++) {
951 free(stat_task->stat_item_values[i]);
952 stat_task->stat_item_values[i] = NULL;
955 stat_task->length_seconds = 0;
956 stat_task->offset_seconds = 0;
957 audiod_status_dump();
958 stat_task->playing = 0;
959 stat_task->stat_item_values[SI_STATUS_BAR] = make_message(
960 "%s:no connection to para_server\n",
961 status_item_list[SI_STATUS_BAR]);
962 stat_client_write(stat_task->stat_item_values[SI_STATUS_BAR],
964 if (stat_task->clock_diff_count) {
965 stat_task->clock_diff_barrier.tv_sec = now->tv_sec + 1;
966 stat_task->clock_diff_barrier.tv_usec = now->tv_usec;
971 * close the connection to para_server and exit
973 * \param status the exit status which is passed to exit(3)
974 * \param msg the log message
976 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
977 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
982 void __noreturn clean_exit(int status, const char *msg)
984 PARA_EMERG_LOG("%s\n", msg);
991 /* avoid busy loop if server is down */
992 static void set_stat_task_restart_barrier(void)
994 struct timeval delay = {5, 0};
995 tv_add(now, &delay, &stat_task->restart_barrier);
998 static void client_task_event_handler(__a_unused struct task *t)
1002 if (t->ret == -E_HANDSHAKE_COMPLETE)
1006 if (t->ret != -E_SERVER_EOF)
1007 stat_task->clock_diff_count = conf.clock_diff_count_arg;
1008 set_stat_task_restart_barrier();
1009 FOR_EACH_AUDIO_FORMAT(i)
1010 afi[i].restart_barrier = stat_task->restart_barrier;
1013 static void status_pre_select(struct sched *s, struct task *t)
1015 struct status_task *st = t->private_data;
1018 t->ret = 1; /* always successful */
1019 if (st->pcd || audiod_status == AUDIOD_OFF)
1021 if (!st->clock_diff_count && tv_diff(now, &st->restart_barrier, NULL)
1024 if (st->clock_diff_count) {
1025 char *argv[] = {"audiod", "stat", "1", NULL};
1027 if (tv_diff(now, &st->clock_diff_barrier, NULL) < 0)
1029 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1030 ret = client_open(argc, argv, &st->pcd);
1033 char *argv[] = {"audiod", "stat", NULL};
1035 ret = client_open(argc, argv, &st->pcd);
1037 set_stat_task_restart_barrier();
1040 st->pcd->task.event_handler = client_task_event_handler;
1041 s->timeout.tv_sec = 0;
1042 s->timeout.tv_usec = 1;
1045 static void status_post_select(__a_unused struct sched *s, struct task *t)
1047 struct status_task *st = t->private_data;
1048 unsigned bytes_left;
1051 if (!st->pcd || st->pcd->status != CL_RECEIVING)
1053 if (st->pcd && audiod_status == AUDIOD_OFF) {
1054 unregister_task(&st->pcd->task);
1056 st->clock_diff_count = conf.clock_diff_count_arg;
1059 bytes_left = for_each_line(st->pcd->buf, st->pcd->loaded,
1060 &check_stat_line, NULL);
1061 if (st->pcd->loaded != bytes_left) {
1062 st->last_status_read = *now;
1063 st->pcd->loaded = bytes_left;
1065 struct timeval diff;
1066 tv_diff(now, &st->last_status_read, &diff);
1067 if (diff.tv_sec > 61)
1072 static void init_status_task(struct status_task *st)
1074 memset(st, 0, sizeof(struct status_task));
1075 st->task.pre_select = status_pre_select;
1076 st->task.post_select = status_post_select;
1077 st->task.private_data = st;
1078 st->sa_time_diff_sign = 1;
1079 st->clock_diff_count = conf.clock_diff_count_arg;
1080 sprintf(st->task.status, "status task");
1083 static void set_initial_status(void)
1085 audiod_status = AUDIOD_ON;
1086 if (!conf.mode_given)
1088 if (!strcmp(conf.mode_arg, "sb")) {
1089 audiod_status = AUDIOD_STANDBY;
1092 if (!strcmp(conf.mode_arg, "off")) {
1093 audiod_status = AUDIOD_OFF;
1096 if (strcmp(conf.mode_arg, "on"))
1097 PARA_WARNING_LOG("%s", "invalid mode\n");
1101 * the main function of para_audiod
1103 * \param argc usual argument count
1104 * \param argv usual argument vector
1106 * \return EXIT_SUCCESS or EXIT_FAILURE
1108 * \sa para_audiod(1)
1110 int main(int argc, char *argv[])
1115 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1116 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1119 audiod_cmdline_parser(argc, argv, &conf);
1120 HANDLE_VERSION_FLAG("audiod", conf);
1121 para_drop_privileges(conf.user_arg, conf.group_arg);
1122 config_file = configfile_exists();
1124 struct audiod_cmdline_parser_params params = {
1127 .check_required = 0,
1128 .check_ambiguity = 0
1131 if (audiod_cmdline_parser_config_file(config_file, &conf, ¶ms)) {
1132 PARA_EMERG_LOG("%s", "parse error in config file\n");
1137 if (conf.logfile_given)
1138 logfile = open_log(conf.logfile_arg);
1139 log_welcome("para_audiod", conf.loglevel_arg);
1140 i = init_stream_io();
1142 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1145 server_uptime(UPTIME_SET);
1146 set_initial_status();
1150 setup_signal_handling();
1151 signal_setup_default(sig_task);
1152 sig_task->task.event_handler = signal_event_handler;
1154 init_status_task(stat_task);
1155 init_command_task(cmd_task);
1156 init_audiod_task(audiod_task);
1158 if (conf.daemon_given)
1161 register_task(&sig_task->task);
1162 register_task(&cmd_task->task);
1163 register_task(&stat_task->task);
1164 register_task(audiod_task);
1165 s.default_timeout.tv_sec = 0;
1166 s.default_timeout.tv_usec = 99 * 1000;
1169 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1170 return EXIT_FAILURE;