2 * Copyright (C) 2005-2009 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 */
12 #include <openssl/rc4.h>
17 #include "audiod.cmdline.h"
23 #include "grab_client.h"
24 #include "client.cmdline.h"
32 #include "write_common.h"
35 /** define the array of error lists needed by para_audiod */
37 /** define the array containing all supported audio formats */
38 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
40 /** Defines how audiod handles one supported audio format. */
41 struct audio_format_info {
42 /** pointer to the receiver for this audio format */
43 struct receiver *receiver;
44 /** the receiver configuration */
46 /** the number of filters that should be activated for this audio format */
47 unsigned int num_filters;
48 /** Array of filter numbers to be activated. */
49 unsigned *filter_nums;
50 /** Pointer to the array of filter configurations. */
52 /** the number of filters that should be activated for this audio format */
53 unsigned int num_writers;
54 /** Array of writer numbers to be activated. */
56 /** pointer to the array of writer configurations */
58 /** do not start receiver/filters/writer before this time */
59 struct timeval restart_barrier;
63 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
64 * be associated with a receiver/filter/writer triple. This array holds all
65 * information on the status of these slots.
67 * \sa struct slot_info
69 struct slot_info slot[MAX_STREAM_SLOTS];
71 /** The vss status flags audiod is interested in. */
72 enum vss_status_flags {
73 /** Whether the 'N' flag is set. */
74 VSS_STATUS_FLAG_NEXT = 1,
75 /** The 'P' flag is set. */
76 VSS_STATUS_FLAG_PLAYING = 2,
80 * The task for obtaining para_server's status (para_client stat).
82 * \sa struct task, struct sched.
85 /** The associated task structure of audiod. */
87 /** Client data associated with the stat task. */
88 struct client_task *ct;
89 /** Do not restart client command until this time. */
90 struct timeval restart_barrier;
91 /** Last time we received status data from para_server. */
92 struct timeval last_status_read;
93 /** The offset value announced by para_server. */
95 /** The length of the current audio file as announced by para_server. */
97 /** The start of the current stream from the view of para_server. */
98 struct timeval server_stream_start;
99 /** The average time deviation between para_server and para_audiod. */
100 struct timeval sa_time_diff;
101 /** Whether client time is ahead of server time. */
102 int sa_time_diff_sign;
103 /** The 'P' and the 'N' flags as announced by para_server. */
104 enum vss_status_flags vss_status;
105 /** Number of times the clock difference is to be checked. */
106 unsigned clock_diff_count;
107 /** When to start the next check for clock difference. */
108 struct timeval clock_diff_barrier;
109 /** Number of the audio format as announced by para_server. */
110 int current_audio_format_num;
113 /** The array of status items sent by para_server. */
114 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
117 * the current mode of operation of which can be changed by the on/off/cycle
118 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
120 int audiod_status = AUDIOD_ON;
123 * the gengetopt args_info struct that holds information on all command line
126 struct audiod_args_info conf;
128 static char *socket_name;
129 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
131 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
133 static struct status_task status_task_struct;
136 * the task that calls the status command of para_server
138 * \sa struct status_task
140 static struct status_task *stat_task = &status_task_struct;
141 static struct timeval initial_delay_barrier;
144 * the task for handling audiod commands
146 * \sa struct task, struct sched
148 struct command_task {
149 /** the local listening socket */
151 /** the associated task structure */
155 /** iterate over all supported audio formats */
156 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
159 * get the audio format number
160 * \param name the name of the audio format
162 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
163 * \a name is not a supported audio format.
165 int get_audio_format_num(const char *name)
169 while (para_isspace(*name))
171 FOR_EACH_AUDIO_FORMAT(i)
172 if (!strcmp(name, audio_formats[i]))
174 return -E_UNSUPPORTED_AUDIO_FORMAT;
177 char *get_time_string(int slot_num)
179 int ret, seconds = 0, length;
180 struct timeval *tmp, sum, sss, /* server stream start */
181 wtime, /* now - writer start */
182 rskip; /* receiver start - sss */
183 struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
185 if (audiod_status == AUDIOD_OFF)
187 if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
188 if (stat_task->length_seconds) /* paused */
190 goto empty; /* stopped */
192 if (audiod_status == AUDIOD_ON && !s)
194 /* valid status items and playing */
195 if (s) { /* writer active in this slot */
196 length = s->seconds_total;
197 tmp = &s->server_stream_start;
198 } else { /* standby mode, rely on status items */
199 length = stat_task->length_seconds;
200 tmp = &stat_task->server_stream_start;
202 if (stat_task->sa_time_diff_sign > 0)
203 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
205 tv_add(tmp, &stat_task->sa_time_diff, &sss);
208 tv_diff(now, &sss, &diff);
209 seconds = diff.tv_sec + stat_task->offset_seconds;
212 tv_diff(now, &s->wstime, &wtime);
213 seconds = s->offset_seconds;
214 ret = tv_diff(&s->rstime, &sss, &rskip);
215 if (ret > 0) { /* audiod was started in the middle of the stream */
216 tv_add(&wtime, &rskip, &sum);
217 seconds += sum.tv_sec;
219 seconds += wtime.tv_sec;
221 seconds = PARA_MIN(seconds, length);
222 seconds = PARA_MAX(seconds, 0);
224 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
228 (length - seconds) / 60,
229 (length - seconds) % 60,
230 length? (seconds * 100 + length / 2) / length : 0,
235 return para_strdup(NULL);
238 static int want_colors(void)
240 if (conf.color_arg == color_arg_no)
242 if (conf.color_arg == color_arg_yes)
244 if (conf.logfile_given)
246 return isatty(STDERR_FILENO);
249 static void parse_config_or_die(void)
253 struct audiod_cmdline_parser_params params = {
257 .check_ambiguity = 0,
261 if (conf.config_file_given)
262 config_file = para_strdup(conf.config_file_arg);
264 char *home = para_homedir();
265 config_file = make_message("%s/.paraslash/audiod.conf", home);
268 ret = file_exists(config_file);
269 if (conf.config_file_given && !ret) {
270 PARA_EMERG_LOG("can not read config file %s\n", config_file);
274 audiod_cmdline_parser_config_file(config_file, &conf, ¶ms);
276 daemon_set_loglevel(conf.loglevel_arg);
283 static void setup_signal_handling(void)
285 sig_task->fd = para_signal_init();
286 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
287 para_install_sighandler(SIGINT);
288 para_install_sighandler(SIGTERM);
289 para_install_sighandler(SIGHUP);
290 para_sigaction(SIGPIPE, SIG_IGN);
293 static void clear_slot(int slot_num)
295 struct slot_info *s = &slot[slot_num];
297 PARA_INFO_LOG("clearing slot %d\n", slot_num);
298 memset(s, 0, sizeof(struct slot_info));
302 static void close_receiver(int slot_num)
304 struct slot_info *s = &slot[slot_num];
305 struct audio_format_info *a;
307 if (s->format < 0 || !s->receiver_node)
310 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
311 audio_formats[s->format], slot_num);
312 a->receiver->close(s->receiver_node);
313 free(s->receiver_node);
314 s->receiver_node = NULL;
315 stat_task->current_audio_format_num = -1;
318 static void kill_all_decoders(int error)
323 struct slot_info *s = &slot[i];
324 if (s->wng && s->wng->task.error >= 0) {
325 PARA_INFO_LOG("deactivating wng in slot %d\n",
327 s->wng->task.error = error;
329 if (s->fc && s->fc->task.error >= 0) {
330 PARA_INFO_LOG("deactivatimg filter chain in slot %d\n", i);
331 s->fc->task.error = error;
333 if (s->receiver_node && s->receiver_node->task.error >= 0) {
334 PARA_INFO_LOG("deactivating receiver_node in slot %d\n", i);
335 s->receiver_node->task.error = error;
340 static int get_empty_slot(void)
351 if (s->wng || s->receiver_node || s->fc)
356 return -E_NO_MORE_SLOTS;
360 * get the number of filters
362 * \param audio_format_num the number identifying the audio format
364 * \return the number of filters for the given audio format
368 int num_filters(int audio_format_num)
370 return afi[audio_format_num].num_filters;
373 static void open_filters(int slot_num)
375 struct slot_info *s = &slot[slot_num];
376 struct audio_format_info *a = &afi[s->format];
377 struct filter_node *fn;
378 int nf = a->num_filters;
384 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
385 s->fc = para_calloc(sizeof(struct filter_chain));
386 s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_node));
387 s->fc->inbufp = &s->receiver_node->buf;
388 s->fc->in_loaded = &s->receiver_node->loaded;
389 s->fc->input_error = &s->receiver_node->task.error;
390 s->fc->task.pre_select = NULL;
391 s->fc->task.post_select = filter_post_select;
392 s->fc->task.error = 0;
393 s->fc->num_filters = nf;
395 s->receiver_node->output_error = &s->fc->task.error;
396 sprintf(s->fc->task.status, "filter chain");
397 FOR_EACH_FILTER_NODE(fn, s->fc, i) {
398 struct filter *f = filters + a->filter_nums[i];
399 fn->filter_num = a->filter_nums[i];
400 fn->conf = a->filter_conf[i];
403 INIT_LIST_HEAD(&fn->callbacks);
405 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
406 audio_formats[s->format], i, nf, f->name, slot_num);
407 s->fc->outbufp = &fn->buf;
408 s->fc->out_loaded = &fn->loaded;
410 register_task(&s->fc->task);
413 static void open_writers(int slot_num)
416 struct slot_info *s = &slot[slot_num];
417 struct audio_format_info *a = &afi[s->format];
419 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
421 s->wng = setup_default_wng();
423 s->wng = wng_new(a->num_writers);
425 s->wng->bufp = s->fc->outbufp;
426 s->wng->loaded = s->fc->out_loaded;
427 s->wng->input_error = &s->fc->task.error;
428 s->wng->channels = &s->fc->channels;
429 s->wng->samplerate = &s->fc->samplerate;
430 s->fc->output_error = &s->wng->task.error;
431 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
433 s->wng->bufp = &s->receiver_node->buf;
434 s->wng->loaded = &s->receiver_node->loaded;
435 s->wng->input_error = &s->receiver_node->task.error;
437 for (i = 0; i < a->num_writers; i++) {
438 s->wng->writer_nodes[i].conf = a->writer_conf[i];
439 s->wng->writer_nodes[i].writer_num = a->writer_nums[i];
441 ret = wng_open(s->wng);
445 s->server_stream_start = stat_task->server_stream_start.tv_sec?
446 stat_task->server_stream_start : *now;
447 s->offset_seconds = stat_task->offset_seconds;
448 s->seconds_total = stat_task->length_seconds;
449 activate_inactive_grab_clients(s->format, s->fc);
452 static int open_receiver(int format)
454 struct audio_format_info *a = &afi[format];
457 struct receiver_node *rn;
458 const struct timeval restart_delay = {2, 0};
460 ret = get_empty_slot();
466 s->receiver_node = para_calloc(sizeof(struct receiver_node));
467 rn = s->receiver_node;
468 rn->receiver = a->receiver;
469 rn->conf = a->receiver_conf;
470 ret = a->receiver->open(s->receiver_node);
472 free(s->receiver_node);
473 s->receiver_node = NULL;
476 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
477 audio_formats[s->format], a->receiver->name, slot_num);
478 rn->task.pre_select = a->receiver->pre_select;
479 rn->task.post_select = a->receiver->post_select;
481 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
482 register_task(&rn->task);
486 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
487 tv_add(now, &restart_delay, &afi[format].restart_barrier);
491 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
492 static int receiver_running(int format)
497 struct slot_info *s = &slot[i];
498 if (s->format != format)
500 if (!s->receiver_node)
502 if (s->receiver_node->task.error >= 0)
509 static void open_current_receiver(struct sched *s)
512 int ret, cafn = stat_task->current_audio_format_num;
514 if (cafn < 0 || !stat_task->ct)
516 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
517 if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
519 ret = receiver_running(cafn);
520 if (ret > 0) /* already running and not eof */
522 if (ret < 0) { /* eof */
524 * para_server uses a zero start time during the announcement
525 * period, i.e. before it sends the first chunk. Wait until
526 * this period begins to avoid restarting the receiver that
527 * belongs to the file just completed.
529 if (stat_task->server_stream_start.tv_sec)
532 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
533 /* avoid busy loop */
537 /* start a new receiver */
541 static unsigned compute_time_diff(const struct timeval *status_time)
543 struct timeval tmp, diff;
544 static unsigned count;
545 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
546 const struct timeval max_deviation = {0, 500 * 1000};
547 const int time_smooth = 5;
551 sign = tv_diff(status_time, now, &diff);
552 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
553 // sign, sa_time_diff_sign);
555 sa_time_diff_sign = sign;
556 stat_task->sa_time_diff = diff;
561 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
562 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
563 PARA_WARNING_LOG("time diff jump: %lims\n",
567 sa_time_diff_sign = tv_convex_combination(
568 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
569 count > 10? sign : sign * time_smooth, &diff,
571 stat_task->sa_time_diff = tmp;
572 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
575 sa_time_diff_sign ? "+" : "-",
576 tv2ms(&stat_task->sa_time_diff)
579 stat_task->sa_time_diff_sign = sa_time_diff_sign;
583 static int update_item(int itemnum, char *buf)
585 long unsigned sec, usec;
587 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
589 free(stat_item_values[itemnum]);
590 stat_item_values[itemnum] = para_strdup(buf);
591 stat_client_write_item(itemnum);
593 case SI_STATUS_FLAGS:
594 stat_task->vss_status = 0;
595 if (strchr(buf, 'N'))
596 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
597 if (strchr(buf, 'P'))
598 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
601 stat_task->offset_seconds = atoi(buf);
603 case SI_SECONDS_TOTAL:
604 stat_task->length_seconds = atoi(buf);
606 case SI_STREAM_START:
607 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
608 struct timeval a_start, delay;
609 delay.tv_sec = conf.stream_delay_arg / 1000;
610 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
611 stat_task->server_stream_start.tv_sec = sec;
612 stat_task->server_stream_start.tv_usec = usec;
613 if (compute_time_diff(NULL) > 2) {
614 if (stat_task->sa_time_diff_sign < 0)
615 tv_add(&stat_task->server_stream_start,
616 &stat_task->sa_time_diff, &a_start);
618 tv_diff(&stat_task->server_stream_start,
619 &stat_task->sa_time_diff, &a_start);
620 tv_add(&a_start, &delay, &initial_delay_barrier);
624 case SI_CURRENT_TIME:
625 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
626 struct timeval tv = {sec, usec};
627 compute_time_diff(&tv);
631 stat_task->current_audio_format_num
632 = get_audio_format_num(buf);
637 static int parse_stream_command(const char *txt, char **cmd)
639 char *p = strchr(txt, ':');
643 return -E_MISSING_COLON;
645 FOR_EACH_AUDIO_FORMAT(i) {
646 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
651 return -E_UNSUPPORTED_AUDIO_FORMAT;
654 static int add_filter(int format, char *cmdline)
656 struct audio_format_info *a = &afi[format];
657 int filter_num, nf = a->num_filters;
659 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
662 a->filter_nums[nf] = filter_num;
664 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
665 filters[filter_num].name);
669 static int parse_writer_args(void)
673 struct audio_format_info *a;
675 nw = PARA_MAX(1U, conf.writer_given);
676 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
677 FOR_EACH_AUDIO_FORMAT(i) {
679 a->writer_conf = para_malloc(nw * sizeof(void *));
680 a->writer_nums = para_malloc(nw * sizeof(int));
683 for (i = 0; i < conf.writer_given; i++) {
686 ret = parse_stream_command(conf.writer_arg[i], &cmd);
691 wconf = check_writer_arg(cmd, &writer_num);
696 a->writer_nums[nw] = writer_num;
697 a->writer_conf[nw] = wconf;
698 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
699 nw, writer_names[writer_num]);
707 static int parse_receiver_args(void)
709 int i, ret, receiver_num;
711 struct audio_format_info *a;
713 for (i = conf.receiver_given - 1; i >= 0; i--) {
714 char *arg = conf.receiver_arg[i];
715 char *recv_arg = strchr(arg, ':');
716 ret = -E_MISSING_COLON;
721 ret = get_audio_format_num(arg);
724 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
725 if (!afi[ret].receiver_conf) {
726 ret = -E_RECV_SYNTAX;
729 afi[ret].receiver = &receivers[receiver_num];
731 /* use the first available receiver with no arguments
732 * for those audio formats for which no receiver
735 cmd = para_strdup(receivers[0].name);
736 FOR_EACH_AUDIO_FORMAT(i) {
738 if (a->receiver_conf)
740 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
741 if (!a->receiver_conf)
742 return -E_RECV_SYNTAX;
743 a->receiver = &receivers[receiver_num];
751 static int init_default_filters(void)
755 FOR_EACH_AUDIO_FORMAT(i) {
756 struct audio_format_info *a = &afi[i];
761 continue; /* no default -- nothing to to */
762 /* add "dec" to audio format name */
763 tmp = make_message("%sdec", audio_formats[i]);
764 for (j = 0; filters[j].name; j++)
765 if (!strcmp(tmp, filters[j].name))
768 ret = -E_UNSUPPORTED_FILTER;
769 if (!filters[j].name)
771 tmp = para_strdup(filters[j].name);
772 ret = add_filter(i, tmp);
776 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
783 static int parse_filter_args(void)
787 nf = PARA_MAX(1U, conf.filter_given);
788 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
789 FOR_EACH_AUDIO_FORMAT(i) {
790 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
791 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
793 if (!conf.no_default_filters_given)
794 return init_default_filters();
795 for (i = 0; i < conf.filter_given; i++) {
796 char *arg = conf.filter_arg[i];
797 char *filter_name = strchr(arg, ':');
798 ret = -E_MISSING_COLON;
803 ret = get_audio_format_num(arg);
806 ret = add_filter(ret, filter_name);
810 ret = init_default_filters(); /* use default values for the rest */
815 static int parse_stream_args(void)
819 ret = parse_receiver_args();
822 ret = parse_filter_args();
825 ret = parse_writer_args();
831 /* does not unlink socket on errors */
832 static int audiod_get_socket(void)
834 struct sockaddr_un unix_addr;
837 if (conf.socket_given)
838 socket_name = para_strdup(conf.socket_arg);
840 char *hn = para_hostname();
841 socket_name = make_message("/var/paraslash/audiod_socket.%s",
845 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
846 if (conf.force_given)
848 ret = create_local_socket(socket_name, &unix_addr,
849 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
853 if (listen(fd , 5) < 0) {
854 ret = -ERRNO_TO_PARA_ERROR(errno);
857 ret = mark_fd_nonblocking(fd);
862 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
866 static void signal_pre_select(struct sched *s, struct task *t)
868 struct signal_task *st = container_of(t, struct signal_task, task);
869 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
872 static void signal_post_select(struct sched *s, struct task *t)
874 struct signal_task *st = container_of(t, struct signal_task, task);
876 if (!FD_ISSET(st->fd, &s->rfds))
879 st->signum = para_next_signal();
880 switch (st->signum) {
884 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
885 clean_exit(EXIT_FAILURE, "caught deadly signal");
889 static void signal_setup_default(struct signal_task *st)
891 st->task.pre_select = signal_pre_select;
892 st->task.post_select = signal_post_select;
893 sprintf(st->task.status, "signal task");
896 static void command_pre_select(struct sched *s, struct task *t)
898 struct command_task *ct = container_of(t, struct command_task, task);
899 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
902 static void command_post_select(struct sched *s, struct task *t)
905 struct command_task *ct = container_of(t, struct command_task, task);
906 static struct timeval last_status_dump;
909 tv_add(&last_status_dump, &(struct timeval){0, 500 * 1000}, &tmp);
910 if (tv_diff(&tmp, now, NULL) < 0) {
911 audiod_status_dump();
912 last_status_dump = *now;
915 if (!FD_ISSET(ct->fd, &s->rfds))
917 ret = handle_connect(ct->fd);
919 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
922 static void init_command_task(struct command_task *ct)
924 ct->task.pre_select = command_pre_select;
925 ct->task.post_select = command_post_select;
927 ct->fd = audiod_get_socket(); /* doesn't return on errors */
928 sprintf(ct->task.status, "command task");
931 static void close_stat_pipe(void)
935 client_close(stat_task->ct);
936 stat_task->ct = NULL;
937 clear_and_dump_items();
938 stat_task->length_seconds = 0;
939 stat_task->offset_seconds = 0;
940 stat_task->vss_status = 0;
941 stat_task->current_audio_format_num = -1;
942 audiod_status_dump();
946 * close the connection to para_server and exit
948 * \param status the exit status which is passed to exit(3)
949 * \param msg the log message
951 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
952 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
957 void __noreturn clean_exit(int status, const char *msg)
959 PARA_EMERG_LOG("%s\n", msg);
966 /* avoid busy loop if server is down */
967 static void set_stat_task_restart_barrier(unsigned seconds)
969 struct timeval delay = {seconds, 0};
970 tv_add(now, &delay, &stat_task->restart_barrier);
973 static void try_to_close_slot(int slot_num)
975 struct slot_info *s = &slot[slot_num];
979 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
981 if (s->fc && s->fc->task.error != -E_TASK_UNREGISTERED)
983 if (s->wng && s->wng->task.error != -E_TASK_UNREGISTERED)
985 PARA_INFO_LOG("closing slot %d\n", slot_num);
987 close_filters(s->fc);
989 close_receiver(slot_num);
990 clear_slot(slot_num);
994 * Check if any receivers/filters/writers need to be started and do so if
997 static void start_stop_decoders(struct sched *s)
1002 try_to_close_slot(i);
1003 if (audiod_status != AUDIOD_ON ||
1004 !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1005 return kill_all_decoders(-E_NOT_PLAYING);
1006 open_current_receiver(s);
1008 struct slot_info *sl = &slot[i];
1009 struct audio_format_info *a;
1010 struct timeval diff;
1014 a = &afi[sl->format];
1015 if (!sl->receiver_node)
1017 if ((!a->num_filters || sl->fc) && sl->wng)
1018 continue; /* everything already started */
1019 if (!a->num_filters) {
1020 if (sl->receiver_node->loaded && !sl->wng) {
1025 if (sl->receiver_node->loaded && !sl->fc) {
1029 if (sl->wng || !sl->fc || !*sl->fc->out_loaded)
1031 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
1035 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
1036 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
1043 /* restart the client task if necessary */
1044 static void status_pre_select(struct sched *s, struct task *t)
1046 struct status_task *st = container_of(t, struct status_task, task);
1048 if (audiod_status == AUDIOD_OFF) {
1051 if (st->ct->task.error >= 0) {
1052 st->ct->task.error = -E_AUDIOD_OFF;
1055 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1058 st->clock_diff_count = conf.clock_diff_count_arg;
1063 if (st->ct->task.error < 0) {
1064 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1069 if (st->ct->status != CL_RECEIVING)
1071 ret = for_each_stat_item(st->ct->buf, st->ct->loaded,
1074 st->ct->task.error = ret;
1077 if (st->ct->loaded != ret) {
1078 st->last_status_read = *now;
1079 st->ct->loaded = ret;
1081 struct timeval diff;
1082 tv_diff(now, &st->last_status_read, &diff);
1083 if (diff.tv_sec > 61)
1084 st->ct->task.error = -E_STATUS_TIMEOUT;
1088 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1090 if (st->clock_diff_count) { /* get status only one time */
1091 char *argv[] = {"audiod", "--", "stat", "-p", "1", NULL};
1093 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1094 st->clock_diff_count--;
1095 client_open(argc, argv, &st->ct, NULL);
1096 set_stat_task_restart_barrier(2);
1099 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1101 client_open(argc, argv, &st->ct, NULL);
1102 set_stat_task_restart_barrier(5);
1104 free(stat_item_values[SI_BASENAME]);
1105 stat_item_values[SI_BASENAME] = para_strdup(
1106 "no connection to para_server");
1107 stat_client_write_item(SI_BASENAME);
1108 st->last_status_read = *now;
1110 start_stop_decoders(s);
1113 static void init_status_task(struct status_task *st)
1115 memset(st, 0, sizeof(struct status_task));
1116 st->task.pre_select = status_pre_select;
1117 st->sa_time_diff_sign = 1;
1118 st->clock_diff_count = conf.clock_diff_count_arg;
1119 st->current_audio_format_num = -1;
1120 sprintf(st->task.status, "status task");
1123 static void set_initial_status(void)
1125 audiod_status = AUDIOD_ON;
1126 if (!conf.mode_given)
1128 if (!strcmp(conf.mode_arg, "sb")) {
1129 audiod_status = AUDIOD_STANDBY;
1132 if (!strcmp(conf.mode_arg, "off")) {
1133 audiod_status = AUDIOD_OFF;
1136 if (strcmp(conf.mode_arg, "on"))
1137 PARA_WARNING_LOG("invalid mode\n");
1140 __noreturn static void print_help_and_die(void)
1142 int d = conf.detailed_help_given;
1143 const char **p = d? audiod_args_info_detailed_help
1144 : audiod_args_info_help;
1146 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1147 AUDIOD_CMDLINE_PARSER_VERSION);
1148 printf_or_die("%s\n\n", audiod_args_info_usage);
1150 printf_or_die("%s\n", *p);
1151 print_receiver_helps(d);
1152 print_filter_helps(d);
1153 print_writer_helps(d);
1157 static void init_colors_or_die(void)
1163 daemon_set_default_log_colors();
1164 daemon_set_flag(DF_COLOR_LOG);
1165 for (i = 0; i < conf.log_color_given; i++) {
1166 ret = daemon_set_log_color(conf.log_color_arg[i]);
1173 * the main function of para_audiod
1175 * \param argc usual argument count
1176 * \param argv usual argument vector
1178 * \return EXIT_SUCCESS or EXIT_FAILURE
1180 * \sa para_audiod(1)
1182 int main(int argc, char *argv[])
1185 static struct sched s;
1186 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1187 struct audiod_cmdline_parser_params params = {
1190 .check_required = 0,
1191 .check_ambiguity = 0,
1196 if (audiod_cmdline_parser_ext(argc, argv, &conf, ¶ms))
1198 HANDLE_VERSION_FLAG("audiod", conf);
1199 /* init receivers/filters/writers early to make help work */
1203 if (conf.help_given || conf.detailed_help_given)
1204 print_help_and_die();
1205 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1206 parse_config_or_die();
1207 init_colors_or_die();
1208 init_random_seed_or_die();
1209 daemon_set_flag(DF_LOG_TIME);
1210 daemon_set_flag(DF_LOG_HOSTNAME);
1211 daemon_set_flag(DF_LOG_LL);
1212 if (conf.log_timing_given)
1213 daemon_set_flag(DF_LOG_TIMING);
1214 if (conf.logfile_given) {
1215 daemon_set_logfile(conf.logfile_arg);
1216 daemon_open_log_or_die();
1218 ret = parse_stream_args();
1220 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1223 log_welcome("para_audiod");
1224 server_uptime(UPTIME_SET);
1225 set_initial_status();
1229 setup_signal_handling();
1230 signal_setup_default(sig_task);
1232 init_status_task(stat_task);
1233 init_command_task(cmd_task);
1235 if (conf.daemon_given)
1238 register_task(&sig_task->task);
1239 register_task(&cmd_task->task);
1240 register_task(&stat_task->task);
1241 s.default_timeout.tv_sec = 0;
1242 s.default_timeout.tv_usec = 999 * 1000;
1245 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1246 return EXIT_FAILURE;