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 */
11 #include <openssl/rc4.h>
16 #include "audiod.cmdline.h"
22 #include "grab_client.h"
23 #include "client.cmdline.h"
31 #include "write_common.h"
34 /** define the array of error lists needed by para_audiod */
36 /** define the array containing all supported audio formats */
37 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
39 /** Defines how audiod handles one supported audio format. */
40 struct audio_format_info {
41 /** pointer to the receiver for this audio format */
42 struct receiver *receiver;
43 /** the receiver configuration */
45 /** the number of filters that should be activated for this audio format */
46 unsigned int num_filters;
47 /** Array of filter numbers to be activated. */
48 unsigned *filter_nums;
49 /** Pointer to the array of filter configurations. */
51 /** the number of filters that should be activated for this audio format */
52 unsigned int num_writers;
53 /** Array of writer numbers to be activated. */
55 /** pointer to the array of writer configurations */
57 /** do not start receiver/filters/writer before this time */
58 struct timeval restart_barrier;
62 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
63 * be associated with a receiver/filter/writer triple. This array holds all
64 * information on the status of these slots.
66 * \sa struct slot_info
68 struct slot_info slot[MAX_STREAM_SLOTS];
70 /** The vss status flags audiod is interested in. */
71 enum vss_status_flags {
72 /** Whether the 'N' flag is set. */
73 VSS_STATUS_FLAG_NEXT = 1,
74 /** The 'P' flag is set. */
75 VSS_STATUS_FLAG_PLAYING = 2,
79 * The task for obtaining para_server's status (para_client stat).
81 * \sa struct task, struct sched.
84 /** The associated task structure of audiod. */
86 /** Client data associated with the stat task. */
87 struct client_task *ct;
88 /** Do not restart client command until this time. */
89 struct timeval restart_barrier;
90 /** Last time we received status data from para_server. */
91 struct timeval last_status_read;
92 /** The offset value announced by para_server. */
94 /** The length of the current audio file as announced by para_server. */
96 /** The start of the current stream from the view of para_server. */
97 struct timeval server_stream_start;
98 /** The average time deviation between para_server and para_audiod. */
99 struct timeval sa_time_diff;
100 /** Whether client time is ahead of server time. */
101 int sa_time_diff_sign;
102 /** The 'P' and the 'N' flags as announced by para_server. */
103 enum vss_status_flags vss_status;
104 /** Number of times the clock difference is to be checked. */
105 unsigned clock_diff_count;
106 /** When to start the next check for clock difference. */
107 struct timeval clock_diff_barrier;
108 /** Number of the audio format as announced by para_server. */
109 int current_audio_format_num;
112 /** The array of status items sent by para_server. */
113 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
116 * the current mode of operation of which can be changed by the on/off/cycle
117 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
119 int audiod_status = AUDIOD_ON;
122 * the gengetopt args_info struct that holds information on all command line
125 struct audiod_args_info conf;
127 static char *socket_name;
128 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
130 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
132 static struct status_task status_task_struct;
135 * the task that calls the status command of para_server
137 * \sa struct status_task
139 static struct status_task *stat_task = &status_task_struct;
140 static struct timeval initial_delay_barrier;
143 * the task for handling audiod commands
145 * \sa struct task, struct sched
147 struct command_task {
148 /** the local listening socket */
150 /** the associated task structure */
154 /** iterate over all supported audio formats */
155 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
158 * get the audio format number
159 * \param name the name of the audio format
161 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
162 * \a name is not a supported audio format.
164 int get_audio_format_num(const char *name)
168 while (para_isspace(*name))
170 FOR_EACH_AUDIO_FORMAT(i)
171 if (!strcmp(name, audio_formats[i]))
173 return -E_UNSUPPORTED_AUDIO_FORMAT;
176 char *get_time_string(int slot_num)
178 int ret, seconds = 0, length;
179 struct timeval *tmp, sum, sss, /* server stream start */
180 wtime, /* now - writer start */
181 rskip; /* receiver start - sss */
182 struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
184 if (audiod_status == AUDIOD_OFF)
186 if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
187 if (stat_task->length_seconds) /* paused */
189 goto empty; /* stopped */
191 if (audiod_status == AUDIOD_ON && !s)
193 /* valid status items and playing */
194 if (s) { /* writer active in this slot */
195 length = s->seconds_total;
196 tmp = &s->server_stream_start;
197 } else { /* standby mode, rely on status items */
198 length = stat_task->length_seconds;
199 tmp = &stat_task->server_stream_start;
201 if (stat_task->sa_time_diff_sign > 0)
202 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
204 tv_add(tmp, &stat_task->sa_time_diff, &sss);
207 tv_diff(now, &sss, &diff);
208 seconds = diff.tv_sec + stat_task->offset_seconds;
211 tv_diff(now, &s->wstime, &wtime);
212 seconds = s->offset_seconds;
213 ret = tv_diff(&s->rstime, &sss, &rskip);
214 if (ret > 0) { /* audiod was started in the middle of the stream */
215 tv_add(&wtime, &rskip, &sum);
216 seconds += sum.tv_sec;
218 seconds += wtime.tv_sec;
220 seconds = PARA_MIN(seconds, length);
221 seconds = PARA_MAX(seconds, 0);
223 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
227 (length - seconds) / 60,
228 (length - seconds) % 60,
229 length? (seconds * 100 + length / 2) / length : 0,
234 return para_strdup(NULL);
237 static int want_colors(void)
239 if (conf.color_arg == color_arg_no)
241 if (conf.color_arg == color_arg_yes)
243 if (conf.logfile_given)
245 return isatty(STDERR_FILENO);
248 static void parse_config_or_die(void)
252 struct audiod_cmdline_parser_params params = {
256 .check_ambiguity = 0,
260 if (conf.config_file_given)
261 config_file = para_strdup(conf.config_file_arg);
263 char *home = para_homedir();
264 config_file = make_message("%s/.paraslash/audiod.conf", home);
267 ret = file_exists(config_file);
268 if (conf.config_file_given && !ret) {
269 PARA_EMERG_LOG("can not read config file %s\n", config_file);
273 audiod_cmdline_parser_config_file(config_file, &conf, ¶ms);
275 daemon_set_loglevel(conf.loglevel_arg);
282 static void setup_signal_handling(void)
284 sig_task->fd = para_signal_init();
285 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
286 para_install_sighandler(SIGINT);
287 para_install_sighandler(SIGTERM);
288 para_install_sighandler(SIGHUP);
289 para_sigaction(SIGPIPE, SIG_IGN);
292 static void clear_slot(int slot_num)
294 struct slot_info *s = &slot[slot_num];
296 PARA_INFO_LOG("clearing slot %d\n", slot_num);
297 memset(s, 0, sizeof(struct slot_info));
301 static void close_receiver(int slot_num)
303 struct slot_info *s = &slot[slot_num];
304 struct audio_format_info *a;
306 if (s->format < 0 || !s->receiver_node)
309 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
310 audio_formats[s->format], slot_num);
311 a->receiver->close(s->receiver_node);
312 free(s->receiver_node);
313 s->receiver_node = NULL;
316 static void kill_all_decoders(int error)
321 struct slot_info *s = &slot[i];
322 if (s->wng && s->wng->task.error >= 0) {
323 PARA_INFO_LOG("deactivating wng in slot %d\n",
325 s->wng->task.error = error;
327 if (s->fc && s->fc->task.error >= 0) {
328 PARA_INFO_LOG("deactivatimg filter chain in slot %d\n", i);
329 s->fc->task.error = error;
331 if (s->receiver_node && s->receiver_node->task.error >= 0) {
332 PARA_INFO_LOG("deactivating receiver_node in slot %d\n", i);
333 s->receiver_node->task.error = error;
338 static int get_empty_slot(void)
349 if (s->wng || s->receiver_node || s->fc)
354 return -E_NO_MORE_SLOTS;
358 * get the number of filters
360 * \param audio_format_num the number identifying the audio format
362 * \return the number of filters for the given audio format
366 int num_filters(int audio_format_num)
368 return afi[audio_format_num].num_filters;
371 static void open_filters(int slot_num)
373 struct slot_info *s = &slot[slot_num];
374 struct audio_format_info *a = &afi[s->format];
375 struct filter_node *fn;
376 int nf = a->num_filters;
382 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
383 s->fc = para_calloc(sizeof(struct filter_chain));
384 s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_node));
385 s->fc->inbufp = &s->receiver_node->buf;
386 s->fc->in_loaded = &s->receiver_node->loaded;
387 s->fc->input_error = &s->receiver_node->task.error;
388 s->fc->task.pre_select = filter_pre_select;
389 s->fc->task.post_select = NULL;
390 s->fc->task.error = 0;
391 s->fc->num_filters = nf;
393 s->receiver_node->output_error = &s->fc->task.error;
394 sprintf(s->fc->task.status, "filter chain");
395 FOR_EACH_FILTER_NODE(fn, s->fc, i) {
396 struct filter *f = filters + a->filter_nums[i];
397 fn->filter_num = a->filter_nums[i];
398 fn->conf = a->filter_conf[i];
401 INIT_LIST_HEAD(&fn->callbacks);
403 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
404 audio_formats[s->format], i, nf, f->name, slot_num);
405 s->fc->outbufp = &fn->buf;
406 s->fc->out_loaded = &fn->loaded;
408 register_task(&s->fc->task);
411 static void open_writers(int slot_num)
414 struct slot_info *s = &slot[slot_num];
415 struct audio_format_info *a = &afi[s->format];
417 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
419 s->wng = setup_default_wng();
421 s->wng = wng_new(a->num_writers);
423 s->wng->bufp = s->fc->outbufp;
424 s->wng->loaded = s->fc->out_loaded;
425 s->wng->input_error = &s->fc->task.error;
426 s->wng->channels = &s->fc->channels;
427 s->wng->samplerate = &s->fc->samplerate;
428 s->fc->output_error = &s->wng->task.error;
429 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
431 s->wng->bufp = &s->receiver_node->buf;
432 s->wng->loaded = &s->receiver_node->loaded;
433 s->wng->input_error = &s->receiver_node->task.error;
435 for (i = 0; i < a->num_writers; i++) {
436 s->wng->writer_nodes[i].conf = a->writer_conf[i];
437 s->wng->writer_nodes[i].writer_num = a->writer_nums[i];
439 ret = wng_open(s->wng);
443 s->server_stream_start = stat_task->server_stream_start.tv_sec?
444 stat_task->server_stream_start : *now;
445 s->offset_seconds = stat_task->offset_seconds;
446 s->seconds_total = stat_task->length_seconds;
447 activate_inactive_grab_clients(s->format, s->fc);
450 static int open_receiver(int format)
452 struct audio_format_info *a = &afi[format];
455 struct receiver_node *rn;
456 const struct timeval restart_delay = {2, 0};
458 ret = get_empty_slot();
464 s->receiver_node = para_calloc(sizeof(struct receiver_node));
465 rn = s->receiver_node;
466 rn->receiver = a->receiver;
467 rn->conf = a->receiver_conf;
468 ret = a->receiver->open(s->receiver_node);
470 free(s->receiver_node);
471 s->receiver_node = NULL;
474 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
475 audio_formats[s->format], a->receiver->name, slot_num);
476 rn->task.pre_select = a->receiver->pre_select;
477 rn->task.post_select = a->receiver->post_select;
479 sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
480 register_task(&rn->task);
484 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
485 tv_add(now, &restart_delay, &afi[format].restart_barrier);
489 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
490 static int receiver_running(int format)
495 struct slot_info *s = &slot[i];
496 if (s->format != format)
498 if (!s->receiver_node)
500 if (s->receiver_node->task.error >= 0)
507 static void open_current_receiver(struct sched *s)
510 int ret, cafn = stat_task->current_audio_format_num;
512 if (cafn < 0 || !stat_task->ct)
514 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
515 if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
517 ret = receiver_running(cafn);
518 if (ret > 0) /* already running and not eof */
520 if (ret < 0) { /* eof */
522 * para_server uses a zero start time during the announcement
523 * period, i.e. before it sends the first chunk. Wait until
524 * this period begins to avoid restarting the receiver that
525 * belongs to the file just completed.
527 if (stat_task->server_stream_start.tv_sec)
530 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
531 /* avoid busy loop */
535 /* start a new receiver */
539 static unsigned compute_time_diff(const struct timeval *status_time)
541 struct timeval tmp, diff;
542 static unsigned count;
543 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
544 const struct timeval max_deviation = {0, 500 * 1000};
545 const int time_smooth = 5;
549 sign = tv_diff(status_time, now, &diff);
550 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
551 // sign, sa_time_diff_sign);
553 sa_time_diff_sign = sign;
554 stat_task->sa_time_diff = diff;
559 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
560 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
561 PARA_WARNING_LOG("time diff jump: %lims\n",
565 sa_time_diff_sign = tv_convex_combination(
566 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
567 count > 10? sign : sign * time_smooth, &diff,
569 stat_task->sa_time_diff = tmp;
570 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
573 sa_time_diff_sign ? "+" : "-",
574 tv2ms(&stat_task->sa_time_diff)
577 stat_task->sa_time_diff_sign = sa_time_diff_sign;
581 static int update_item(int itemnum, char *buf)
583 long unsigned sec, usec;
585 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
587 free(stat_item_values[itemnum]);
588 stat_item_values[itemnum] = para_strdup(buf);
589 stat_client_write_item(itemnum);
591 case SI_STATUS_FLAGS:
592 stat_task->vss_status = 0;
593 if (strchr(buf, 'N'))
594 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
595 if (strchr(buf, 'P'))
596 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
599 stat_task->offset_seconds = atoi(buf);
601 case SI_SECONDS_TOTAL:
602 stat_task->length_seconds = atoi(buf);
604 case SI_STREAM_START:
605 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
606 struct timeval a_start, delay;
607 delay.tv_sec = conf.stream_delay_arg / 1000;
608 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
609 stat_task->server_stream_start.tv_sec = sec;
610 stat_task->server_stream_start.tv_usec = usec;
611 if (compute_time_diff(NULL) > 2) {
612 if (stat_task->sa_time_diff_sign < 0)
613 tv_add(&stat_task->server_stream_start,
614 &stat_task->sa_time_diff, &a_start);
616 tv_diff(&stat_task->server_stream_start,
617 &stat_task->sa_time_diff, &a_start);
618 tv_add(&a_start, &delay, &initial_delay_barrier);
622 case SI_CURRENT_TIME:
623 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
624 struct timeval tv = {sec, usec};
625 compute_time_diff(&tv);
629 stat_task->current_audio_format_num
630 = get_audio_format_num(buf);
635 static int parse_stream_command(const char *txt, char **cmd)
637 char *p = strchr(txt, ':');
641 return -E_MISSING_COLON;
643 FOR_EACH_AUDIO_FORMAT(i) {
644 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
649 return -E_UNSUPPORTED_AUDIO_FORMAT;
652 static int add_filter(int format, char *cmdline)
654 struct audio_format_info *a = &afi[format];
655 int filter_num, nf = a->num_filters;
657 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
660 a->filter_nums[nf] = filter_num;
662 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
663 filters[filter_num].name);
667 static int parse_writer_args(void)
671 struct audio_format_info *a;
673 nw = PARA_MAX(1U, conf.writer_given);
674 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
675 FOR_EACH_AUDIO_FORMAT(i) {
677 a->writer_conf = para_malloc(nw * sizeof(void *));
678 a->writer_nums = para_malloc(nw * sizeof(int));
681 for (i = 0; i < conf.writer_given; i++) {
684 ret = parse_stream_command(conf.writer_arg[i], &cmd);
689 wconf = check_writer_arg(cmd, &writer_num);
694 a->writer_nums[nw] = writer_num;
695 a->writer_conf[nw] = wconf;
696 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
697 nw, writer_names[writer_num]);
705 static int parse_receiver_args(void)
707 int i, ret, receiver_num;
709 struct audio_format_info *a;
711 for (i = conf.receiver_given - 1; i >= 0; i--) {
712 char *arg = conf.receiver_arg[i];
713 char *recv_arg = strchr(arg, ':');
714 ret = -E_MISSING_COLON;
719 ret = get_audio_format_num(arg);
722 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
723 if (!afi[ret].receiver_conf) {
724 ret = -E_RECV_SYNTAX;
727 afi[ret].receiver = &receivers[receiver_num];
729 /* use the first available receiver with no arguments
730 * for those audio formats for which no receiver
733 cmd = para_strdup(receivers[0].name);
734 FOR_EACH_AUDIO_FORMAT(i) {
736 if (a->receiver_conf)
738 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
739 if (!a->receiver_conf)
740 return -E_RECV_SYNTAX;
741 a->receiver = &receivers[receiver_num];
749 static int init_default_filters(void)
753 FOR_EACH_AUDIO_FORMAT(i) {
754 struct audio_format_info *a = &afi[i];
759 continue; /* no default -- nothing to to */
760 /* add "dec" to audio format name */
761 tmp = make_message("%sdec", audio_formats[i]);
762 for (j = 0; filters[j].name; j++)
763 if (!strcmp(tmp, filters[j].name))
766 ret = -E_UNSUPPORTED_FILTER;
767 if (!filters[j].name)
769 tmp = para_strdup(filters[j].name);
770 ret = add_filter(i, tmp);
774 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
781 static int parse_filter_args(void)
785 nf = PARA_MAX(1U, conf.filter_given);
786 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
787 FOR_EACH_AUDIO_FORMAT(i) {
788 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
789 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
791 if (!conf.no_default_filters_given)
792 return init_default_filters();
793 for (i = 0; i < conf.filter_given; i++) {
794 char *arg = conf.filter_arg[i];
795 char *filter_name = strchr(arg, ':');
796 ret = -E_MISSING_COLON;
801 ret = get_audio_format_num(arg);
804 ret = add_filter(ret, filter_name);
808 ret = init_default_filters(); /* use default values for the rest */
813 static int parse_stream_args(void)
817 ret = parse_receiver_args();
820 ret = parse_filter_args();
823 ret = parse_writer_args();
829 /* does not unlink socket on errors */
830 static int audiod_get_socket(void)
832 struct sockaddr_un unix_addr;
835 if (conf.socket_given)
836 socket_name = para_strdup(conf.socket_arg);
838 char *hn = para_hostname();
839 socket_name = make_message("/var/paraslash/audiod_socket.%s",
843 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
844 if (conf.force_given)
846 ret = create_local_socket(socket_name, &unix_addr,
847 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
851 if (listen(fd , 5) < 0) {
852 ret = -ERRNO_TO_PARA_ERROR(errno);
855 ret = mark_fd_nonblocking(fd);
860 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
864 static void signal_pre_select(struct sched *s, struct task *t)
866 struct signal_task *st = container_of(t, struct signal_task, task);
867 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
870 static void signal_post_select(struct sched *s, struct task *t)
872 struct signal_task *st = container_of(t, struct signal_task, task);
874 if (!FD_ISSET(st->fd, &s->rfds))
877 st->signum = para_next_signal();
878 switch (st->signum) {
882 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
883 clean_exit(EXIT_FAILURE, "caught deadly signal");
887 static void signal_setup_default(struct signal_task *st)
889 st->task.pre_select = signal_pre_select;
890 st->task.post_select = signal_post_select;
891 sprintf(st->task.status, "signal task");
894 static void command_pre_select(struct sched *s, struct task *t)
896 struct command_task *ct = container_of(t, struct command_task, task);
897 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
900 static void command_post_select(struct sched *s, struct task *t)
903 struct command_task *ct = container_of(t, struct command_task, task);
905 audiod_status_dump();
906 if (!FD_ISSET(ct->fd, &s->rfds))
908 ret = handle_connect(ct->fd);
910 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
913 static void init_command_task(struct command_task *ct)
915 ct->task.pre_select = command_pre_select;
916 ct->task.post_select = command_post_select;
918 ct->fd = audiod_get_socket(); /* doesn't return on errors */
919 sprintf(ct->task.status, "command task");
922 static void close_stat_pipe(void)
926 client_close(stat_task->ct);
927 stat_task->ct = NULL;
928 clear_and_dump_items();
929 stat_task->length_seconds = 0;
930 stat_task->offset_seconds = 0;
931 stat_task->vss_status = 0;
932 audiod_status_dump();
936 * close the connection to para_server and exit
938 * \param status the exit status which is passed to exit(3)
939 * \param msg the log message
941 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
942 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
947 void __noreturn clean_exit(int status, const char *msg)
949 PARA_EMERG_LOG("%s\n", msg);
956 /* avoid busy loop if server is down */
957 static void set_stat_task_restart_barrier(unsigned seconds)
959 struct timeval delay = {seconds, 0};
960 tv_add(now, &delay, &stat_task->restart_barrier);
963 static void try_to_close_slot(int slot_num)
965 struct slot_info *s = &slot[slot_num];
969 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
971 if (s->fc && s->fc->task.error != -E_TASK_UNREGISTERED)
973 if (s->wng && s->wng->task.error != -E_TASK_UNREGISTERED)
975 PARA_INFO_LOG("closing slot %d\n", slot_num);
977 close_filters(s->fc);
979 close_receiver(slot_num);
980 clear_slot(slot_num);
984 * Check if any receivers/filters/writers need to be started and do so if
987 static void start_stop_decoders(struct sched *s)
992 try_to_close_slot(i);
993 if (audiod_status != AUDIOD_ON ||
994 !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
995 return kill_all_decoders(-E_NOT_PLAYING);
996 open_current_receiver(s);
998 struct slot_info *sl = &slot[i];
999 struct audio_format_info *a;
1000 struct timeval diff;
1004 a = &afi[sl->format];
1005 if (!sl->receiver_node)
1007 if ((!a->num_filters || sl->fc) && sl->wng)
1008 continue; /* everything already started */
1009 if (!a->num_filters) {
1010 if (sl->receiver_node->loaded && !sl->wng) {
1015 if (sl->receiver_node->loaded && !sl->fc) {
1019 if (sl->wng || !sl->fc || !*sl->fc->out_loaded)
1021 if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
1025 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff));
1026 if (tv_diff(&s->timeout, &diff, NULL) > 0) {
1033 /* restart the client task if necessary */
1034 static void status_pre_select(struct sched *s, struct task *t)
1036 struct status_task *st = container_of(t, struct status_task, task);
1038 if (audiod_status == AUDIOD_OFF) {
1041 if (st->ct->task.error >= 0) {
1042 st->ct->task.error = -E_AUDIOD_OFF;
1045 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1048 st->clock_diff_count = conf.clock_diff_count_arg;
1053 if (st->ct->task.error < 0) {
1054 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1059 if (st->ct->status != CL_RECEIVING)
1061 ret = for_each_stat_item(st->ct->buf, st->ct->loaded,
1064 st->ct->task.error = ret;
1067 if (st->ct->loaded != ret) {
1068 st->last_status_read = *now;
1069 st->ct->loaded = ret;
1071 struct timeval diff;
1072 tv_diff(now, &st->last_status_read, &diff);
1073 if (diff.tv_sec > 61)
1074 st->ct->task.error = -E_STATUS_TIMEOUT;
1078 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1080 if (st->clock_diff_count) { /* get status only one time */
1081 char *argv[] = {"audiod", "--", "stat", "-p", "1", NULL};
1083 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1084 st->clock_diff_count--;
1085 client_open(argc, argv, &st->ct, NULL);
1086 set_stat_task_restart_barrier(2);
1089 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1091 client_open(argc, argv, &st->ct, NULL);
1092 set_stat_task_restart_barrier(5);
1094 free(stat_item_values[SI_BASENAME]);
1095 stat_item_values[SI_BASENAME] = para_strdup(
1096 "no connection to para_server");
1097 stat_client_write_item(SI_BASENAME);
1098 st->last_status_read = *now;
1100 start_stop_decoders(s);
1103 static void init_status_task(struct status_task *st)
1105 memset(st, 0, sizeof(struct status_task));
1106 st->task.pre_select = status_pre_select;
1107 st->sa_time_diff_sign = 1;
1108 st->clock_diff_count = conf.clock_diff_count_arg;
1109 st->current_audio_format_num = -1;
1110 sprintf(st->task.status, "status task");
1113 static void set_initial_status(void)
1115 audiod_status = AUDIOD_ON;
1116 if (!conf.mode_given)
1118 if (!strcmp(conf.mode_arg, "sb")) {
1119 audiod_status = AUDIOD_STANDBY;
1122 if (!strcmp(conf.mode_arg, "off")) {
1123 audiod_status = AUDIOD_OFF;
1126 if (strcmp(conf.mode_arg, "on"))
1127 PARA_WARNING_LOG("invalid mode\n");
1130 __noreturn static void print_help_and_die(void)
1132 int d = conf.detailed_help_given;
1133 const char **p = d? audiod_args_info_detailed_help
1134 : audiod_args_info_help;
1136 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1137 AUDIOD_CMDLINE_PARSER_VERSION);
1138 printf_or_die("%s\n\n", audiod_args_info_usage);
1140 printf_or_die("%s\n", *p);
1141 print_receiver_helps(d);
1142 print_filter_helps(d);
1143 print_writer_helps(d);
1147 static void init_colors_or_die(void)
1153 daemon_set_default_log_colors();
1154 daemon_set_flag(DF_COLOR_LOG);
1155 for (i = 0; i < conf.log_color_given; i++) {
1156 ret = daemon_set_log_color(conf.log_color_arg[i]);
1163 * the main function of para_audiod
1165 * \param argc usual argument count
1166 * \param argv usual argument vector
1168 * \return EXIT_SUCCESS or EXIT_FAILURE
1170 * \sa para_audiod(1)
1172 int main(int argc, char *argv[])
1175 static struct sched s;
1176 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1177 struct audiod_cmdline_parser_params params = {
1180 .check_required = 0,
1181 .check_ambiguity = 0,
1186 if (audiod_cmdline_parser_ext(argc, argv, &conf, ¶ms))
1188 HANDLE_VERSION_FLAG("audiod", conf);
1189 /* init receivers/filters/writers early to make help work */
1193 if (conf.help_given || conf.detailed_help_given)
1194 print_help_and_die();
1195 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1196 parse_config_or_die();
1197 init_colors_or_die();
1198 daemon_set_flag(DF_LOG_TIME);
1199 daemon_set_flag(DF_LOG_HOSTNAME);
1200 daemon_set_flag(DF_LOG_LL);
1201 if (conf.logfile_given) {
1202 daemon_set_logfile(conf.logfile_arg);
1203 daemon_open_log_or_die();
1205 ret = parse_stream_args();
1207 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1210 log_welcome("para_audiod");
1211 server_uptime(UPTIME_SET);
1212 set_initial_status();
1216 setup_signal_handling();
1217 signal_setup_default(sig_task);
1219 init_status_task(stat_task);
1220 init_command_task(cmd_task);
1222 if (conf.daemon_given)
1225 register_task(&sig_task->task);
1226 register_task(&cmd_task->task);
1227 register_task(&stat_task->task);
1228 s.default_timeout.tv_sec = 0;
1229 s.default_timeout.tv_usec = 99 * 1000;
1232 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1233 return EXIT_FAILURE;