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"
29 /** define the array of error lists needed by para_audiod */
31 /** define the array containing all supported audio formats */
32 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
34 /** defines how to handle one supported audio format */
35 struct audio_format_info {
36 /** pointer to the receiver for this audio format */
37 struct receiver *receiver;
38 /** the receiver configuration */
40 /** the number of filters that should be activated for this audio format */
41 unsigned int num_filters;
42 /** pointer to the array of filters to be activated */
43 struct filter **filters;
44 /** pointer to the array of filter configurations */
46 /** the number of filters that should be activated for this audio format */
47 unsigned int num_writers;
48 /** pointer to the array of writers to be activated */
49 struct writer **writers;
50 /** pointer to the array of writer configurations */
52 /** do not start receiver/filters/writer before this time */
53 struct timeval restart_barrier;
57 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
58 * be associated with a receiver/filter/writer triple. This array holds all
59 * information on the status of these slots.
61 * \sa struct slot_info
63 struct slot_info slot[MAX_STREAM_SLOTS];
67 * the current mode of operation of which can be changed by the on/off/cycle
68 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
70 int audiod_status = AUDIOD_ON;
73 * the gengetopt args_info struct that holds information on all command line
76 struct audiod_args_info conf;
78 static char *socket_name;
80 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
82 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
84 static struct status_task status_task_struct;
87 * the task that calls the status command of para_server
89 * \sa struct status_task
91 struct status_task *stat_task = &status_task_struct;
92 static struct timeval initial_delay_barrier;
95 * the task for handling audiod commands
97 * \sa struct task, struct sched
100 /** the local listening socket */
102 /** the associated task structure */
106 /** iterate over all supported audio formats */
107 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
110 * get the audio format number
111 * \param name the name of the audio format
113 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
114 * \a name is not a supported audio format.
116 int get_audio_format_num(char *name)
119 FOR_EACH_AUDIO_FORMAT(i)
120 if (!strcmp(name, audio_formats[i]))
122 return -E_UNSUPPORTED_AUDIO_FORMAT;
126 * the log function of para_audiod
129 * \param fmt the format string
131 void para_log(int ll, const char* fmt,...)
137 char str[MAXLINE] = "";
138 static char *hostname;
140 if (ll < conf.loglevel_arg)
143 hostname = para_hostname();
144 outfd = logfile? logfile : stderr;
147 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
148 fprintf(outfd, "%s %s ", str, hostname);
149 if (conf.loglevel_arg <= INFO)
150 fprintf(outfd, "%i ", ll);
152 vfprintf(outfd, fmt, argp);
156 static char *configfile_exists(void)
158 char *home = para_homedir();
159 char *config_file = make_message("%s/.paraslash/audiod.conf",
162 if (file_exists(config_file))
168 static void setup_signal_handling(void)
170 sig_task->fd = para_signal_init();
171 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
172 para_install_sighandler(SIGINT);
173 para_install_sighandler(SIGTERM);
174 para_install_sighandler(SIGHUP);
175 signal(SIGPIPE, SIG_IGN);
178 static void clear_slot(int slot_num)
180 struct slot_info *s = &slot[slot_num];
182 PARA_INFO_LOG("clearing slot %d\n", slot_num);
183 memset(s, 0, sizeof(struct slot_info));
187 static void close_receiver(int slot_num)
189 struct slot_info *s = &slot[slot_num];
190 struct audio_format_info *a;
192 if (s->format < 0 || !s->receiver_node)
195 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
196 audio_formats[s->format] , slot_num, s->receiver_node->eof);
197 a->receiver->close(s->receiver_node);
198 free(s->receiver_node);
199 s->receiver_node = NULL;
202 static void kill_all_decoders(void)
207 struct slot_info *s = &slot[i];
208 if (s->wng && !s->wng->eof) {
209 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
211 wng_unregister(s->wng);
214 if (s->fc && !s->fc->eof) {
215 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
216 unregister_task(&s->fc->task);
219 if (s->receiver_node && !s->receiver_node->eof) {
220 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
221 unregister_task(&s->receiver_node->task);
222 s->receiver_node->eof = 1;
227 static int get_empty_slot(void)
238 if (s->wng || s->receiver_node || s->fc)
243 return -E_NO_MORE_SLOTS;
247 * get the number of filters
249 * \param audio_format_num the number identifying the audio format
251 * \return the number of filters for the given audio format
255 int num_filters(int audio_format_num)
257 return afi[audio_format_num].num_filters;
260 static void filter_event_handler(struct task *t)
262 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
263 struct filter_chain *fc = t->private_data;
268 static void open_filters(int slot_num)
270 struct slot_info *s = &slot[slot_num];
271 struct audio_format_info *a = &afi[s->format];
272 int nf = a->num_filters;
278 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
279 s->fc = para_calloc(sizeof(struct filter_chain));
280 INIT_LIST_HEAD(&s->fc->filters);
281 s->fc->inbuf = s->receiver_node->buf;
282 s->fc->in_loaded = &s->receiver_node->loaded;
283 s->fc->input_eof = &s->receiver_node->eof;
284 s->fc->task.pre_select = filter_pre_select;
285 s->fc->task.event_handler = filter_event_handler;
286 s->fc->task.private_data = s->fc;
289 s->receiver_node->output_eof = &s->fc->eof;
290 sprintf(s->fc->task.status, "filter chain");
291 for (i = 0; i < nf; i++) {
292 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
293 fn->conf = a->filter_conf[i];
295 fn->filter = a->filters[i];
296 INIT_LIST_HEAD(&fn->callbacks);
297 list_add_tail(&fn->node, &s->fc->filters);
298 fn->filter->open(fn);
299 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
300 audio_formats[s->format], i + 1, nf,
301 fn->filter->name, slot_num);
302 s->fc->outbuf = fn->buf;
303 s->fc->out_loaded = &fn->loaded;
305 register_task(&s->fc->task);
308 static void wng_event_handler(struct task *t)
310 struct writer_node_group *wng = t->private_data;
312 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
317 static void open_writers(int slot_num)
320 struct slot_info *s = &slot[slot_num];
321 struct audio_format_info *a = &afi[s->format];
323 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
325 s->wng = setup_default_wng();
327 s->wng = wng_new(a->num_writers);
329 s->wng->buf = s->fc->outbuf;
330 s->wng->loaded = s->fc->out_loaded;
331 s->wng->input_eof = &s->fc->eof;
332 s->wng->channels = &s->fc->channels;
333 s->wng->samplerate = &s->fc->samplerate;
334 s->fc->output_eof = &s->wng->eof;
335 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
337 s->wng->buf = s->receiver_node->buf;
338 s->wng->loaded = &s->receiver_node->loaded;
339 s->wng->input_eof = &s->receiver_node->eof;
341 s->wng->task.event_handler = wng_event_handler;
342 for (i = 0; i < a->num_writers; i++) {
343 s->wng->writer_nodes[i].conf = a->writer_conf[i];
344 s->wng->writer_nodes[i].writer = a->writers[i];
346 ret = wng_open(s->wng);
348 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
352 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
355 static void rn_event_handler(struct task *t)
357 struct receiver_node *rn = t->private_data;
358 const struct timeval restart_delay = {0, 10 * 1000};
361 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
364 /* set restart barrier */
366 if (slot[i].receiver_node != rn)
368 tv_add(now, &restart_delay, &afi[slot[i].format].restart_barrier);
372 static int open_receiver(int format)
374 struct audio_format_info *a = &afi[format];
377 struct receiver_node *rn;
378 const struct timeval restart_delay = {1, 0};
380 ret = get_empty_slot();
386 s->receiver_node = para_calloc(sizeof(struct receiver_node));
387 rn = s->receiver_node;
388 rn->receiver = a->receiver;
389 rn->conf = a->receiver_conf;
390 ret = a->receiver->open(s->receiver_node);
392 free(s->receiver_node);
393 s->receiver_node = NULL;
396 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
397 audio_formats[s->format], a->receiver->name, slot_num);
398 rn->task.private_data = s->receiver_node;
399 rn->task.pre_select = a->receiver->pre_select;
400 rn->task.post_select = a->receiver->post_select;
401 rn->task.event_handler = rn_event_handler;
402 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
403 register_task(&rn->task);
406 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
407 tv_add(now, &restart_delay, &afi[format].restart_barrier);
411 static int receiver_running(int format)
416 struct slot_info *s = &slot[i];
417 if (s->format == format && s->receiver_node
418 && !s->receiver_node->eof)
424 static int open_current_receiver(struct sched *s)
428 char *audio_format = stat_task->stat_item_values[SI_FORMAT];
430 if (!audio_format || !stat_task->pcd)
432 i = get_audio_format_num(audio_format + strlen(
433 status_item_list[SI_FORMAT]) + 1);
436 if (receiver_running(i))
438 if (tv_diff(now, &afi[i].restart_barrier, &diff) < 0) {
442 return open_receiver(i) < 0? 0 : 1;
445 static unsigned compute_time_diff(const struct timeval *status_time)
447 struct timeval tmp, diff;
448 static unsigned count;
449 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
450 const struct timeval max_deviation = {0, 500 * 1000};
451 const int time_smooth = 5;
455 sign = tv_diff(status_time, now, &diff);
456 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
457 // sign, sa_time_diff_sign);
459 sa_time_diff_sign = sign;
460 stat_task->sa_time_diff = diff;
465 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
466 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
467 PARA_WARNING_LOG("time diff jump: %lims\n",
471 sa_time_diff_sign = tv_convex_combination(
472 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
473 count > 10? sign : sign * time_smooth, &diff,
475 stat_task->sa_time_diff = tmp;
476 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
479 sa_time_diff_sign ? "+" : "-",
480 tv2ms(&stat_task->sa_time_diff)
483 stat_task->sa_time_diff_sign = sa_time_diff_sign;
487 static int check_stat_line(char *line, __a_unused void *data)
491 long unsigned sec, usec;
494 // PARA_INFO_LOG("line: %s\n", line);
497 itemnum = stat_line_valid(line);
499 PARA_WARNING_LOG("invalid status line: %s\n", line);
502 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
504 tmp = make_message("%s\n", line);
505 stat_client_write(tmp, itemnum);
507 free(stat_task->stat_item_values[itemnum]);
508 stat_task->stat_item_values[itemnum] = para_strdup(line);
509 ilen = strlen(status_item_list[itemnum]);
512 stat_task->playing = strstr(line, "playing")? 1 : 0;
515 stat_task->offset_seconds = atoi(line + ilen + 1);
518 stat_task->length_seconds = atoi(line + ilen + 1);
520 case SI_STREAM_START:
521 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
522 struct timeval a_start, delay;
523 delay.tv_sec = conf.stream_delay_arg / 1000;
524 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
525 stat_task->server_stream_start.tv_sec = sec;
526 stat_task->server_stream_start.tv_usec = usec;
527 if (compute_time_diff(NULL) > 2) {
528 if (stat_task->sa_time_diff_sign < 0)
529 tv_add(&stat_task->server_stream_start,
530 &stat_task->sa_time_diff, &a_start);
532 tv_diff(&stat_task->server_stream_start,
533 &stat_task->sa_time_diff, &a_start);
534 tv_add(&a_start, &delay, &initial_delay_barrier);
538 case SI_CURRENT_TIME:
539 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
540 struct timeval tv = {sec, usec};
541 compute_time_diff(&tv);
543 if (stat_task->clock_diff_count)
544 stat_task->clock_diff_count--;
550 static void try_to_close_slot(int slot_num)
552 struct slot_info *s = &slot[slot_num];
556 if (s->receiver_node && !s->receiver_node->eof)
558 if (s->fc && !s->fc->eof)
560 if (s->wng && !s->wng->eof)
562 PARA_INFO_LOG("closing slot %d \n", slot_num);
564 close_filters(s->fc);
566 close_receiver(slot_num);
567 clear_slot(slot_num);
571 * Check if any receivers/filters/writers need to be started and do so if
572 * neccessary. Since the pre_select function didn't have a chance yet to put
573 * file descriptors into the fd sets given by s, make the upcoming select()
574 * return immediately to avoid a long timeout in case we started something.
576 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
579 struct timeval min_delay = {0, 1};
582 if (audiod_status != AUDIOD_ON || !stat_task->playing)
583 return kill_all_decoders();
584 if (open_current_receiver(s))
585 s->timeout = min_delay;
587 struct slot_info *sl = &slot[i];
588 struct audio_format_info *a;
593 a = &afi[sl->format];
594 if (!sl->receiver_node)
596 if (!a->num_filters) {
597 if (sl->receiver_node->loaded && !sl->wng) {
599 s->timeout = min_delay;
603 if (sl->receiver_node->loaded && !sl->fc) {
605 s->timeout = min_delay;
608 if (!sl->fc || !*sl->fc->out_loaded || sl->wng)
610 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
612 s->timeout = min_delay;
615 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
616 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
622 static void audiod_post_select(__a_unused struct sched *s,
623 __a_unused struct task *t)
629 try_to_close_slot(i);
632 static void init_audiod_task(struct task *t)
634 t->pre_select = audiod_pre_select;
635 t->post_select = audiod_post_select;
636 t->event_handler = NULL;
638 sprintf(t->status, "audiod task");
641 static int parse_stream_command(const char *txt, char **cmd)
643 char *p = strchr(txt, ':');
647 return -E_MISSING_COLON;
649 FOR_EACH_AUDIO_FORMAT(i) {
650 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
655 return -E_UNSUPPORTED_AUDIO_FORMAT;
658 static int add_filter(int format, char *cmdline)
660 struct audio_format_info *a = &afi[format];
661 int filter_num, nf = a->num_filters;
663 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
666 a->filters[nf] = &filters[filter_num];
668 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
669 a->filters[nf]->name);
673 static int init_writers(void)
677 struct audio_format_info *a;
679 init_supported_writers();
680 nw = PARA_MAX(1, conf.writer_given);
681 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
682 FOR_EACH_AUDIO_FORMAT(i) {
684 a->writer_conf = para_malloc(nw * sizeof(void *));
685 a->writers = para_malloc(nw * sizeof(struct writer *));
688 for (i = 0; i < conf.writer_given; i++) {
691 ret = parse_stream_command(conf.writer_arg[i], &cmd);
696 wconf = check_writer_arg(cmd, &writer_num);
701 a->writers[nw] = &writers[writer_num];
702 a->writer_conf[nw] = wconf;
703 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
704 nw, writer_names[writer_num]);
712 static int init_receivers(void)
714 int i, ret, receiver_num;
716 struct audio_format_info *a;
718 for (i = 0; receivers[i].name; i++) {
719 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
720 receivers[i].init(&receivers[i]);
722 for (i = conf.receiver_given - 1; i >= 0; i--) {
723 char *arg = conf.receiver_arg[i];
724 char *recv_arg = strchr(arg, ':');
725 ret = -E_MISSING_COLON;
730 ret = get_audio_format_num(arg);
733 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
734 if (!afi[ret].receiver_conf) {
735 ret = -E_RECV_SYNTAX;
738 afi[ret].receiver = &receivers[receiver_num];
740 /* use the first available receiver with no arguments
741 * for those audio formats for which no receiver
744 cmd = para_strdup(receivers[0].name);
745 FOR_EACH_AUDIO_FORMAT(i) {
747 if (a->receiver_conf)
749 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
750 if (!a->receiver_conf)
751 return -E_RECV_SYNTAX;
752 a->receiver = &receivers[receiver_num];
760 static int init_default_filters(void)
764 FOR_EACH_AUDIO_FORMAT(i) {
765 struct audio_format_info *a = &afi[i];
770 continue; /* no default -- nothing to to */
771 /* add "dec" to audio format name */
772 tmp = make_message("%sdec", audio_formats[i]);
773 for (j = 0; filters[j].name; j++)
774 if (!strcmp(tmp, filters[j].name))
777 ret = -E_UNSUPPORTED_FILTER;
778 if (!filters[j].name)
780 tmp = para_strdup(filters[j].name);
781 ret = add_filter(i, tmp);
785 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
792 static int init_filters(void)
796 filter_init(filters);
797 nf = PARA_MAX(1, conf.filter_given);
798 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
799 FOR_EACH_AUDIO_FORMAT(i) {
800 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
801 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
803 if (!conf.no_default_filters_given)
804 return init_default_filters();
805 for (i = 0; i < conf.filter_given; i++) {
806 char *arg = conf.filter_arg[i];
807 char *filter_name = strchr(arg, ':');
808 ret = -E_MISSING_COLON;
813 ret = get_audio_format_num(arg);
816 ret = add_filter(ret, filter_name);
820 ret = init_default_filters(); /* use default values for the rest */
825 static int init_stream_io(void)
829 ret = init_writers();
832 ret = init_receivers();
835 ret = init_filters();
841 static int audiod_get_socket(void)
843 struct sockaddr_un unix_addr;
846 if (conf.socket_given)
847 socket_name = para_strdup(conf.socket_arg);
849 char *hn = para_hostname();
850 socket_name = make_message("/var/paraslash/audiod_socket.%s",
854 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
855 if (conf.force_given)
857 fd = create_local_socket(socket_name, &unix_addr,
858 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
860 PARA_EMERG_LOG("can not connect to socket\n");
861 exit(EXIT_FAILURE); /* do not unlink socket */
863 if (listen(fd , 5) < 0) {
864 PARA_EMERG_LOG("can not listen on socket\n");
865 exit(EXIT_FAILURE); /* do not unlink socket */
867 mark_fd_nonblock(fd);
871 static void signal_event_handler(struct task *t)
873 struct signal_task *st = t->private_data;
875 switch (st->signum) {
879 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
880 clean_exit(EXIT_FAILURE, "caught deadly signal");
884 static void signal_pre_select(struct sched *s, struct task *t)
886 struct signal_task *st = t->private_data;
888 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
891 static void signal_post_select(struct sched *s, struct task *t)
893 struct signal_task *st = t->private_data;
895 if (!FD_ISSET(st->fd, &s->rfds))
897 t->ret = -E_SIGNAL_CAUGHT;
898 st->signum = para_next_signal();
901 static void signal_setup_default(struct signal_task *st)
903 st->task.pre_select = signal_pre_select;
904 st->task.post_select = signal_post_select;
905 st->task.private_data = st;
906 sprintf(st->task.status, "signal task");
909 static void command_pre_select(struct sched *s, struct task *t)
911 struct command_task *ct = t->private_data;
913 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
917 static void command_post_select(struct sched *s, struct task *t)
920 struct command_task *ct = t->private_data;
922 t->ret = 1; /* always successful */
923 audiod_status_dump();
924 if (!FD_ISSET(ct->fd, &s->rfds))
926 ret = handle_connect(ct->fd);
928 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
931 static void init_command_task(struct command_task *ct)
933 ct->task.pre_select = command_pre_select;
934 ct->task.post_select = command_post_select;
935 ct->task.event_handler = NULL;
936 ct->task.private_data = ct;
937 ct->fd = audiod_get_socket(); /* doesn't return on errors */
938 sprintf(ct->task.status, "command task");
941 static void close_stat_pipe(void)
947 client_close(stat_task->pcd);
948 stat_task->pcd = NULL;
949 for (i = 0; i < NUM_STAT_ITEMS; i++) {
950 free(stat_task->stat_item_values[i]);
951 stat_task->stat_item_values[i] = NULL;
954 stat_task->length_seconds = 0;
955 stat_task->offset_seconds = 0;
956 audiod_status_dump();
957 stat_task->playing = 0;
958 stat_task->stat_item_values[SI_STATUS_BAR] = make_message(
959 "%s:no connection to para_server\n",
960 status_item_list[SI_STATUS_BAR]);
961 stat_client_write(stat_task->stat_item_values[SI_STATUS_BAR],
963 if (stat_task->clock_diff_count) {
964 stat_task->clock_diff_barrier.tv_sec = now->tv_sec + 1;
965 stat_task->clock_diff_barrier.tv_usec = now->tv_usec;
970 * close the connection to para_server and exit
972 * \param status the exit status which is passed to exit(3)
973 * \param msg the log message
975 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
976 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
981 void __noreturn clean_exit(int status, const char *msg)
983 PARA_EMERG_LOG("%s\n", msg);
990 /* avoid busy loop if server is down */
991 static void set_stat_task_restart_barrier(void)
993 struct timeval delay = {5, 0};
994 tv_add(now, &delay, &stat_task->restart_barrier);
997 static void client_task_event_handler(__a_unused struct task *t)
1001 if (t->ret == -E_HANDSHAKE_COMPLETE)
1005 if (t->ret != -E_SERVER_EOF)
1006 stat_task->clock_diff_count = conf.clock_diff_count_arg;
1007 set_stat_task_restart_barrier();
1008 FOR_EACH_AUDIO_FORMAT(i)
1009 afi[i].restart_barrier = stat_task->restart_barrier;
1012 static void status_pre_select(struct sched *s, struct task *t)
1014 struct status_task *st = t->private_data;
1017 t->ret = 1; /* always successful */
1018 if (st->pcd || audiod_status == AUDIOD_OFF)
1020 if (!st->clock_diff_count && tv_diff(now, &st->restart_barrier, NULL)
1023 if (st->clock_diff_count) {
1024 char *argv[] = {"audiod", "stat", "1", NULL};
1026 if (tv_diff(now, &st->clock_diff_barrier, NULL) < 0)
1028 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1029 ret = client_open(argc, argv, &st->pcd);
1032 char *argv[] = {"audiod", "stat", NULL};
1034 ret = client_open(argc, argv, &st->pcd);
1036 set_stat_task_restart_barrier();
1039 st->pcd->task.event_handler = client_task_event_handler;
1040 s->timeout.tv_sec = 0;
1041 s->timeout.tv_usec = 1;
1044 static void status_post_select(__a_unused struct sched *s, struct task *t)
1046 struct status_task *st = t->private_data;
1047 unsigned bytes_left;
1050 if (!st->pcd || st->pcd->status != CL_RECEIVING)
1052 if (st->pcd && audiod_status == AUDIOD_OFF) {
1053 unregister_task(&st->pcd->task);
1055 st->clock_diff_count = conf.clock_diff_count_arg;
1058 bytes_left = for_each_line(st->pcd->buf, st->pcd->loaded,
1059 &check_stat_line, NULL);
1060 if (st->pcd->loaded != bytes_left) {
1061 st->last_status_read = *now;
1062 st->pcd->loaded = bytes_left;
1064 struct timeval diff;
1065 tv_diff(now, &st->last_status_read, &diff);
1066 if (diff.tv_sec > 61)
1071 static void init_status_task(struct status_task *st)
1073 memset(st, 0, sizeof(struct status_task));
1074 st->task.pre_select = status_pre_select;
1075 st->task.post_select = status_post_select;
1076 st->task.private_data = st;
1077 st->sa_time_diff_sign = 1;
1078 st->clock_diff_count = conf.clock_diff_count_arg;
1079 sprintf(st->task.status, "status task");
1082 static void set_initial_status(void)
1084 audiod_status = AUDIOD_ON;
1085 if (!conf.mode_given)
1087 if (!strcmp(conf.mode_arg, "sb")) {
1088 audiod_status = AUDIOD_STANDBY;
1091 if (!strcmp(conf.mode_arg, "off")) {
1092 audiod_status = AUDIOD_OFF;
1095 if (strcmp(conf.mode_arg, "on"))
1096 PARA_WARNING_LOG("%s", "invalid mode\n");
1100 * the main function of para_audiod
1102 * \param argc usual argument count
1103 * \param argv usual argument vector
1105 * \return EXIT_SUCCESS or EXIT_FAILURE
1107 * \sa para_audiod(1)
1109 int main(int argc, char *argv[])
1114 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1115 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1118 audiod_cmdline_parser(argc, argv, &conf);
1119 HANDLE_VERSION_FLAG("audiod", conf);
1120 para_drop_privileges(conf.user_arg, conf.group_arg);
1121 config_file = configfile_exists();
1123 struct audiod_cmdline_parser_params params = {
1126 .check_required = 0,
1127 .check_ambiguity = 0
1130 if (audiod_cmdline_parser_config_file(config_file, &conf, ¶ms)) {
1131 PARA_EMERG_LOG("%s", "parse error in config file\n");
1136 if (conf.logfile_given)
1137 logfile = open_log(conf.logfile_arg);
1138 log_welcome("para_audiod", conf.loglevel_arg);
1139 i = init_stream_io();
1141 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1144 server_uptime(UPTIME_SET);
1145 set_initial_status();
1149 setup_signal_handling();
1150 signal_setup_default(sig_task);
1151 sig_task->task.event_handler = signal_event_handler;
1153 init_status_task(stat_task);
1154 init_command_task(cmd_task);
1155 init_audiod_task(audiod_task);
1157 if (conf.daemon_given)
1160 register_task(&sig_task->task);
1161 register_task(&cmd_task->task);
1162 register_task(&stat_task->task);
1163 register_task(audiod_task);
1164 s.default_timeout.tv_sec = 0;
1165 s.default_timeout.tv_usec = 99 * 1000;
1168 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1169 return EXIT_FAILURE;