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>
18 #include "audiod.cmdline.h"
23 #include "buffer_tree.h"
25 #include "grab_client.h"
26 #include "client.cmdline.h"
34 #include "write_common.h"
37 /** define the array of error lists needed by para_audiod */
39 /** define the array containing all supported audio formats */
40 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
42 /** Defines how audiod handles one supported audio format. */
43 struct audio_format_info {
44 /** pointer to the receiver for this audio format */
45 struct receiver *receiver;
46 /** the receiver configuration */
48 /** the number of filters that should be activated for this audio format */
49 unsigned int num_filters;
50 /** Array of filter numbers to be activated. */
51 unsigned *filter_nums;
52 /** Pointer to the array of filter configurations. */
54 /** the number of filters that should be activated for this audio format */
55 unsigned int num_writers;
56 /** Array of writer numbers to be activated. */
58 /** pointer to the array of writer configurations */
60 /** do not start receiver/filters/writer before this time */
61 struct timeval restart_barrier;
65 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
66 * be associated with a receiver/filter/writer triple. This array holds all
67 * information on the status of these slots.
69 * \sa struct slot_info
71 struct slot_info slot[MAX_STREAM_SLOTS];
73 /** The vss status flags audiod is interested in. */
74 enum vss_status_flags {
75 /** Whether the 'N' flag is set. */
76 VSS_STATUS_FLAG_NEXT = 1,
77 /** The 'P' flag is set. */
78 VSS_STATUS_FLAG_PLAYING = 2,
82 * The task for obtaining para_server's status (para_client stat).
84 * \sa struct task, struct sched.
87 /** The associated task structure of audiod. */
89 /** Client data associated with the stat task. */
90 struct client_task *ct;
91 /** Do not restart client command until this time. */
92 struct timeval restart_barrier;
93 /** Last time we received status data from para_server. */
94 struct timeval last_status_read;
95 /** The offset value announced by para_server. */
97 /** The length of the current audio file as announced by para_server. */
99 /** The start of the current stream from the view of para_server. */
100 struct timeval server_stream_start;
101 /** The average time deviation between para_server and para_audiod. */
102 struct timeval sa_time_diff;
103 /** Whether client time is ahead of server time. */
104 int sa_time_diff_sign;
105 /** The 'P' and the 'N' flags as announced by para_server. */
106 enum vss_status_flags vss_status;
107 /** Number of times the clock difference is to be checked. */
108 unsigned clock_diff_count;
109 /** When to start the next check for clock difference. */
110 struct timeval clock_diff_barrier;
111 /** Number of the audio format as announced by para_server. */
112 int current_audio_format_num;
115 /** The array of status items sent by para_server. */
116 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
119 * the current mode of operation of which can be changed by the on/off/cycle
120 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
122 int audiod_status = AUDIOD_ON;
125 * the gengetopt args_info struct that holds information on all command line
128 struct audiod_args_info conf;
130 static char *socket_name;
131 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
133 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
135 static struct status_task status_task_struct;
138 * the task that calls the status command of para_server
140 * \sa struct status_task
142 static struct status_task *stat_task = &status_task_struct;
143 static struct timeval initial_delay_barrier;
146 * the task for handling audiod commands
148 * \sa struct task, struct sched
150 struct command_task {
151 /** the local listening socket */
153 /** the associated task structure */
157 /** iterate over all supported audio formats */
158 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
161 * get the audio format number
162 * \param name the name of the audio format
164 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
165 * \a name is not a supported audio format.
167 int get_audio_format_num(const char *name)
171 while (para_isspace(*name))
173 FOR_EACH_AUDIO_FORMAT(i)
174 if (!strcmp(name, audio_formats[i]))
176 return -E_UNSUPPORTED_AUDIO_FORMAT;
179 char *get_time_string(int slot_num)
181 int ret, seconds = 0, length;
182 struct timeval *tmp, sum, sss, /* server stream start */
183 rstime, /* receiver start time */
184 wstime, /* writer start time */
185 wtime, /* now - writer start */
186 rskip; /* receiver start - sss */
187 struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
190 if (audiod_status == AUDIOD_OFF)
192 if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
193 if (stat_task->length_seconds) /* paused */
195 goto empty; /* stopped */
197 if (audiod_status == AUDIOD_ON && !s)
199 /* valid status items and playing */
200 if (s && s->wns) { /* writer active in this slot */
201 length = s->seconds_total;
202 tmp = &s->server_stream_start;
203 } else { /* standby mode, rely on status items */
204 length = stat_task->length_seconds;
205 tmp = &stat_task->server_stream_start;
207 if (stat_task->sa_time_diff_sign > 0)
208 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
210 tv_add(tmp, &stat_task->sa_time_diff, &sss);
213 tv_diff(now, &sss, &diff);
214 seconds = diff.tv_sec + stat_task->offset_seconds;
217 btr_get_node_start(s->wns[0].btrn, &wstime);
218 tv_diff(now, &wstime, &wtime);
219 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
220 seconds = s->offset_seconds;
221 btr_get_node_start(s->receiver_node->btrn, &rstime);
222 ret = tv_diff(&rstime, &sss, &rskip);
223 if (ret > 0) { /* audiod was started in the middle of the stream */
224 tv_add(&wtime, &rskip, &sum);
225 seconds += sum.tv_sec;
227 seconds += wtime.tv_sec;
229 seconds = PARA_MIN(seconds, length);
230 seconds = PARA_MAX(seconds, 0);
232 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
236 (length - seconds) / 60,
237 (length - seconds) % 60,
238 length? (seconds * 100 + length / 2) / length : 0,
242 PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
245 return para_strdup(NULL);
248 static int want_colors(void)
250 if (conf.color_arg == color_arg_no)
252 if (conf.color_arg == color_arg_yes)
254 if (conf.logfile_given)
256 return isatty(STDERR_FILENO);
259 static void parse_config_or_die(void)
263 struct audiod_cmdline_parser_params params = {
267 .check_ambiguity = 0,
271 if (conf.config_file_given)
272 config_file = para_strdup(conf.config_file_arg);
274 char *home = para_homedir();
275 config_file = make_message("%s/.paraslash/audiod.conf", home);
278 ret = file_exists(config_file);
279 if (conf.config_file_given && !ret) {
280 PARA_EMERG_LOG("can not read config file %s\n", config_file);
284 audiod_cmdline_parser_config_file(config_file, &conf, ¶ms);
286 daemon_set_loglevel(conf.loglevel_arg);
293 static void setup_signal_handling(void)
295 sig_task->fd = para_signal_init();
296 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
297 para_install_sighandler(SIGINT);
298 para_install_sighandler(SIGTERM);
299 para_install_sighandler(SIGHUP);
300 para_sigaction(SIGPIPE, SIG_IGN);
303 static void clear_slot(int slot_num)
305 struct slot_info *s = &slot[slot_num];
307 PARA_INFO_LOG("clearing slot %d\n", slot_num);
308 memset(s, 0, sizeof(struct slot_info));
312 static void close_receiver(int slot_num)
314 struct slot_info *s = &slot[slot_num];
315 struct audio_format_info *a;
317 if (s->format < 0 || !s->receiver_node)
320 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
321 audio_formats[s->format], slot_num);
322 a->receiver->close(s->receiver_node);
323 btr_free_node(s->receiver_node->btrn);
324 free(s->receiver_node);
325 s->receiver_node = NULL;
326 stat_task->current_audio_format_num = -1;
329 static void writer_cleanup(struct writer_node *wn)
331 struct writer *w = writers + wn->writer_num;
334 btr_free_node(wn->btrn);
337 static void close_writers(struct slot_info *s)
339 struct audio_format_info *a;
345 if (a->num_writers == 0)
346 writer_cleanup(s->wns);
348 for (i = 0; i < a->num_writers; i++)
349 writer_cleanup(s->wns + i);
355 static void _close_filters(struct slot_info *s)
358 struct audio_format_info *a = afi + s->format;
359 if (a->num_filters == 0)
361 for (i = 0; i < a->num_filters; i++) {
362 struct filter_node *fn = s->fns + i;
363 struct filter *f = filters + fn->filter_num;
366 btr_free_node(fn->btrn);
372 static void kill_all_decoders(int error)
377 struct slot_info *s = &slot[i];
378 struct audio_format_info *a;
383 for (j = 0; j < a->num_writers; j++)
384 s->wns[j].task.error = error;
386 for (j = 0; j < a->num_writers; j++)
387 s->fns[j].task.error = error;
388 if (s->receiver_node)
389 s->receiver_node->task.error = error;
393 static int get_empty_slot(void)
404 if (s->wns || s->receiver_node || s->fns)
409 return -E_NO_MORE_SLOTS;
413 * get the number of filters
415 * \param audio_format_num the number identifying the audio format
417 * \return the number of filters for the given audio format
421 int num_filters(int audio_format_num)
423 return afi[audio_format_num].num_filters;
426 static void open_filters(struct slot_info *s)
428 struct audio_format_info *a = afi + s->format;
429 struct filter_node *fn;
430 int nf = a->num_filters;
431 struct btr_node *parent;
436 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
437 assert(s->fns == NULL);
438 s->fns = para_calloc(nf * sizeof(struct filter_node));
439 parent = s->receiver_node->btrn;
440 for (i = 0; i < nf; i++) {
441 struct filter *f = filters + a->filter_nums[i];
443 fn->filter_num = a->filter_nums[i];
444 fn->conf = a->filter_conf[i];
445 fn->task.pre_select = f->pre_select;
446 fn->task.post_select = f->post_select;
447 fn->btrn = btr_new_node(f->name, parent, f->execute, fn);
449 register_task(&fn->task);
451 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
452 audio_formats[s->format], i, nf, f->name, s - slot);
453 sprintf(fn->task.status, "%s (slot %d)", f->name, s - slot);
457 static void open_writers(struct slot_info *s)
460 struct audio_format_info *a = afi + s->format;
461 struct writer_node *wn;
462 struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
464 assert(s->wns == NULL);
465 s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
466 * sizeof(struct writer_node));
467 if (a->num_writers == 0)
468 setup_writer_node(NULL, parent, s->wns);
470 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
471 for (i = 0; i < a->num_writers; i++) {
473 wn->conf = a->writer_conf[i];
474 wn->writer_num = a->writer_nums[i];
475 register_writer_node(wn, parent);
478 s->server_stream_start = stat_task->server_stream_start.tv_sec?
479 stat_task->server_stream_start : *now;
480 s->offset_seconds = stat_task->offset_seconds;
481 s->seconds_total = stat_task->length_seconds;
484 /* returns slot num on success */
485 static int open_receiver(int format)
487 struct audio_format_info *a = &afi[format];
490 struct receiver *r = a->receiver;
491 struct receiver_node *rn;
492 const struct timeval restart_delay = {2, 0};
494 ret = get_empty_slot();
500 s->receiver_node = para_calloc(sizeof(struct receiver_node));
501 rn = s->receiver_node;
503 rn->conf = a->receiver_conf;
504 rn->btrn = btr_new_node(r->name, NULL, NULL, rn);
507 btr_free_node(rn->btrn);
509 s->receiver_node = NULL;
512 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
513 audio_formats[s->format], r->name, slot_num);
514 rn->task.pre_select = r->pre_select;
515 rn->task.post_select = r->post_select;
516 sprintf(rn->task.status, "%s receiver node", r->name);
517 register_task(&rn->task);
521 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
522 tv_add(now, &restart_delay, &afi[format].restart_barrier);
526 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
527 static int receiver_running(int format)
532 struct slot_info *s = &slot[i];
533 if (s->format != format)
535 if (!s->receiver_node)
537 if (s->receiver_node->task.error >= 0)
544 struct btr_node *audiod_get_btr_root(void)
546 int i, newest_slot = -1;
547 struct timeval newest_rstime = {0, 0};
550 struct slot_info *s = &slot[i];
551 struct timeval rstime;
552 if (!s->receiver_node)
554 if (s->receiver_node->task.error < 0)
556 btr_get_node_start(s->receiver_node->btrn, &rstime);
557 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
559 newest_rstime = rstime;
562 if (newest_slot == -1)
564 return slot[newest_slot].receiver_node->btrn;
567 /* returns slot num on success. */
568 static int open_current_receiver(struct sched *s)
571 int ret, cafn = stat_task->current_audio_format_num;
573 if (cafn < 0 || !stat_task->ct)
575 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
576 if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
578 ret = receiver_running(cafn);
579 if (ret > 0) /* already running and not eof */
581 if (ret < 0) { /* eof */
583 * para_server uses a zero start time during the announcement
584 * period, i.e. before it sends the first chunk. Wait until
585 * this period begins to avoid restarting the receiver that
586 * belongs to the file just completed.
588 if (stat_task->server_stream_start.tv_sec != 0)
591 if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
592 /* avoid busy loop */
596 /* start a new receiver */
597 return open_receiver(cafn);
600 static unsigned compute_time_diff(const struct timeval *status_time)
602 struct timeval tmp, diff;
603 static unsigned count;
604 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
605 const struct timeval max_deviation = {0, 500 * 1000};
606 const int time_smooth = 5;
610 sign = tv_diff(status_time, now, &diff);
611 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
612 // sign, sa_time_diff_sign);
614 sa_time_diff_sign = sign;
615 stat_task->sa_time_diff = diff;
620 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
621 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
622 PARA_WARNING_LOG("time diff jump: %lims\n",
626 sa_time_diff_sign = tv_convex_combination(
627 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
628 count > 10? sign : sign * time_smooth, &diff,
630 stat_task->sa_time_diff = tmp;
631 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
634 sa_time_diff_sign ? "+" : "-",
635 tv2ms(&stat_task->sa_time_diff)
638 stat_task->sa_time_diff_sign = sa_time_diff_sign;
642 static int update_item(int itemnum, char *buf)
644 long unsigned sec, usec;
646 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
648 free(stat_item_values[itemnum]);
649 stat_item_values[itemnum] = para_strdup(buf);
650 stat_client_write_item(itemnum);
652 case SI_STATUS_FLAGS:
653 stat_task->vss_status = 0;
654 if (strchr(buf, 'N'))
655 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
656 if (strchr(buf, 'P'))
657 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
660 stat_task->offset_seconds = atoi(buf);
662 case SI_SECONDS_TOTAL:
663 stat_task->length_seconds = atoi(buf);
665 case SI_STREAM_START:
666 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
667 struct timeval a_start, delay;
668 delay.tv_sec = conf.stream_delay_arg / 1000;
669 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
670 stat_task->server_stream_start.tv_sec = sec;
671 stat_task->server_stream_start.tv_usec = usec;
672 if (compute_time_diff(NULL) > 2) {
673 if (stat_task->sa_time_diff_sign < 0)
674 tv_add(&stat_task->server_stream_start,
675 &stat_task->sa_time_diff, &a_start);
677 tv_diff(&stat_task->server_stream_start,
678 &stat_task->sa_time_diff, &a_start);
679 tv_add(&a_start, &delay, &initial_delay_barrier);
683 case SI_CURRENT_TIME:
684 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
685 struct timeval tv = {sec, usec};
686 compute_time_diff(&tv);
690 stat_task->current_audio_format_num
691 = get_audio_format_num(buf);
696 static int parse_stream_command(const char *txt, char **cmd)
698 char *p = strchr(txt, ':');
702 return -E_MISSING_COLON;
704 FOR_EACH_AUDIO_FORMAT(i) {
705 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
710 return -E_UNSUPPORTED_AUDIO_FORMAT;
713 static int add_filter(int format, char *cmdline)
715 struct audio_format_info *a = &afi[format];
716 int filter_num, nf = a->num_filters;
718 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
721 a->filter_nums[nf] = filter_num;
723 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
724 filters[filter_num].name);
728 static int parse_writer_args(void)
732 struct audio_format_info *a;
734 nw = PARA_MAX(1U, conf.writer_given);
735 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
736 FOR_EACH_AUDIO_FORMAT(i) {
738 a->writer_conf = para_malloc(nw * sizeof(void *));
739 a->writer_nums = para_malloc(nw * sizeof(int));
742 for (i = 0; i < conf.writer_given; i++) {
745 ret = parse_stream_command(conf.writer_arg[i], &cmd);
750 wconf = check_writer_arg(cmd, &writer_num);
755 a->writer_nums[nw] = writer_num;
756 a->writer_conf[nw] = wconf;
757 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
758 nw, writer_names[writer_num]);
766 static int parse_receiver_args(void)
768 int i, ret, receiver_num;
770 struct audio_format_info *a;
772 for (i = conf.receiver_given - 1; i >= 0; i--) {
773 char *arg = conf.receiver_arg[i];
774 char *recv_arg = strchr(arg, ':');
775 ret = -E_MISSING_COLON;
780 ret = get_audio_format_num(arg);
783 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
784 if (!afi[ret].receiver_conf) {
785 ret = -E_RECV_SYNTAX;
788 afi[ret].receiver = &receivers[receiver_num];
790 /* use the first available receiver with no arguments
791 * for those audio formats for which no receiver
794 cmd = para_strdup(receivers[0].name);
795 FOR_EACH_AUDIO_FORMAT(i) {
797 if (a->receiver_conf)
799 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
800 if (!a->receiver_conf)
801 return -E_RECV_SYNTAX;
802 a->receiver = &receivers[receiver_num];
810 static int init_default_filters(void)
814 FOR_EACH_AUDIO_FORMAT(i) {
815 struct audio_format_info *a = &afi[i];
820 continue; /* no default -- nothing to to */
821 /* add "dec" to audio format name */
822 tmp = make_message("%sdec", audio_formats[i]);
823 for (j = 0; filters[j].name; j++)
824 if (!strcmp(tmp, filters[j].name))
827 ret = -E_UNSUPPORTED_FILTER;
828 if (!filters[j].name)
830 tmp = para_strdup(filters[j].name);
831 ret = add_filter(i, tmp);
835 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
842 static int parse_filter_args(void)
846 nf = PARA_MAX(1U, conf.filter_given);
847 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
848 FOR_EACH_AUDIO_FORMAT(i) {
849 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
850 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
852 if (!conf.no_default_filters_given)
853 return init_default_filters();
854 for (i = 0; i < conf.filter_given; i++) {
855 char *arg = conf.filter_arg[i];
856 char *filter_name = strchr(arg, ':');
857 ret = -E_MISSING_COLON;
862 ret = get_audio_format_num(arg);
865 ret = add_filter(ret, filter_name);
869 ret = init_default_filters(); /* use default values for the rest */
874 static int parse_stream_args(void)
878 ret = parse_receiver_args();
881 ret = parse_filter_args();
884 ret = parse_writer_args();
890 /* does not unlink socket on errors */
891 static int audiod_get_socket(void)
893 struct sockaddr_un unix_addr;
896 if (conf.socket_given)
897 socket_name = para_strdup(conf.socket_arg);
899 char *hn = para_hostname();
900 socket_name = make_message("/var/paraslash/audiod_socket.%s",
904 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
905 if (conf.force_given)
907 ret = create_local_socket(socket_name, &unix_addr,
908 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
912 if (listen(fd , 5) < 0) {
913 ret = -ERRNO_TO_PARA_ERROR(errno);
916 ret = mark_fd_nonblocking(fd);
921 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
925 static void signal_pre_select(struct sched *s, struct task *t)
927 struct signal_task *st = container_of(t, struct signal_task, task);
928 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
931 static void signal_post_select(struct sched *s, struct task *t)
933 struct signal_task *st = container_of(t, struct signal_task, task);
935 if (!FD_ISSET(st->fd, &s->rfds))
938 st->signum = para_next_signal();
939 switch (st->signum) {
943 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
944 clean_exit(EXIT_FAILURE, "caught deadly signal");
948 static void signal_setup_default(struct signal_task *st)
950 st->task.pre_select = signal_pre_select;
951 st->task.post_select = signal_post_select;
952 sprintf(st->task.status, "signal task");
955 static void command_pre_select(struct sched *s, struct task *t)
957 struct command_task *ct = container_of(t, struct command_task, task);
958 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
961 static void command_post_select(struct sched *s, struct task *t)
964 struct command_task *ct = container_of(t, struct command_task, task);
965 static struct timeval last_status_dump;
966 struct timeval tmp, delay = {0, 500 * 1000};
968 tv_add(&last_status_dump, &delay, &tmp);
969 if (tv_diff(&tmp, now, NULL) < 0) {
970 audiod_status_dump();
971 last_status_dump = *now;
974 if (!FD_ISSET(ct->fd, &s->rfds))
976 ret = handle_connect(ct->fd);
978 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
981 static void init_command_task(struct command_task *ct)
983 ct->task.pre_select = command_pre_select;
984 ct->task.post_select = command_post_select;
986 ct->fd = audiod_get_socket(); /* doesn't return on errors */
987 sprintf(ct->task.status, "command task");
990 static void close_stat_pipe(void)
994 client_close(stat_task->ct);
995 stat_task->ct = NULL;
996 clear_and_dump_items();
997 stat_task->length_seconds = 0;
998 stat_task->offset_seconds = 0;
999 stat_task->vss_status = 0;
1000 stat_task->current_audio_format_num = -1;
1001 audiod_status_dump();
1005 * close the connection to para_server and exit
1007 * \param status the exit status which is passed to exit(3)
1008 * \param msg the log message
1010 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1011 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1016 void __noreturn clean_exit(int status, const char *msg)
1018 PARA_EMERG_LOG("%s\n", msg);
1020 unlink(socket_name);
1025 /* avoid busy loop if server is down */
1026 static void set_stat_task_restart_barrier(unsigned seconds)
1028 struct timeval delay = {seconds, 0};
1029 tv_add(now, &delay, &stat_task->restart_barrier);
1032 static void try_to_close_slot(int slot_num)
1034 struct slot_info *s = &slot[slot_num];
1035 struct audio_format_info *a = afi + s->format;
1040 if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
1042 for (i = 0; i < a->num_filters; i++)
1043 if (s->fns && s->fns[i].task.error != -E_TASK_UNREGISTERED)
1045 for (i = 0; i < a->num_writers; i++)
1046 if (s->wns && s->wns[i].task.error != -E_TASK_UNREGISTERED)
1048 PARA_INFO_LOG("closing slot %d\n", slot_num);
1051 close_receiver(slot_num);
1052 clear_slot(slot_num);
1056 * Check if any receivers/filters/writers need to be started and do so if
1059 static void start_stop_decoders(struct sched *s)
1062 struct slot_info *sl;
1063 struct audio_format_info *a;
1066 try_to_close_slot(i);
1067 // if (audiod_status != AUDIOD_ON ||
1068 // !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1069 // return kill_all_decoders(-E_NOT_PLAYING);
1070 ret = open_current_receiver(s);
1074 a = afi + sl->format;
1078 activate_grab_clients();
1079 btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1080 s->timeout.tv_sec = 0;
1081 s->timeout.tv_usec = 1;
1084 /* restart the client task if necessary */
1085 static void status_pre_select(struct sched *s, struct task *t)
1087 struct status_task *st = container_of(t, struct status_task, task);
1089 if (audiod_status == AUDIOD_OFF) {
1092 if (st->ct->task.error >= 0) {
1093 st->ct->task.error = -E_AUDIOD_OFF;
1096 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1099 st->clock_diff_count = conf.clock_diff_count_arg;
1104 if (st->ct->task.error < 0) {
1105 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1110 if (st->ct->status != CL_RECEIVING)
1112 ret = for_each_stat_item(st->ct->buf, st->ct->loaded,
1115 st->ct->task.error = ret;
1118 if (st->ct->loaded != ret) {
1119 st->last_status_read = *now;
1120 st->ct->loaded = ret;
1122 struct timeval diff;
1123 tv_diff(now, &st->last_status_read, &diff);
1124 if (diff.tv_sec > 61)
1125 st->ct->task.error = -E_STATUS_TIMEOUT;
1129 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1131 if (st->clock_diff_count) { /* get status only one time */
1132 char *argv[] = {"audiod", "--", "stat", "-p", "1", NULL};
1134 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1135 st->clock_diff_count--;
1136 client_open(argc, argv, &st->ct, NULL);
1137 set_stat_task_restart_barrier(2);
1140 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1142 client_open(argc, argv, &st->ct, NULL);
1143 set_stat_task_restart_barrier(5);
1145 free(stat_item_values[SI_BASENAME]);
1146 stat_item_values[SI_BASENAME] = para_strdup(
1147 "no connection to para_server");
1148 stat_client_write_item(SI_BASENAME);
1149 st->last_status_read = *now;
1151 start_stop_decoders(s);
1154 static void init_status_task(struct status_task *st)
1156 memset(st, 0, sizeof(struct status_task));
1157 st->task.pre_select = status_pre_select;
1158 st->sa_time_diff_sign = 1;
1159 st->clock_diff_count = conf.clock_diff_count_arg;
1160 st->current_audio_format_num = -1;
1161 sprintf(st->task.status, "status task");
1164 static void set_initial_status(void)
1166 audiod_status = AUDIOD_ON;
1167 if (!conf.mode_given)
1169 if (!strcmp(conf.mode_arg, "sb")) {
1170 audiod_status = AUDIOD_STANDBY;
1173 if (!strcmp(conf.mode_arg, "off")) {
1174 audiod_status = AUDIOD_OFF;
1177 if (strcmp(conf.mode_arg, "on"))
1178 PARA_WARNING_LOG("invalid mode\n");
1181 __noreturn static void print_help_and_die(void)
1183 int d = conf.detailed_help_given;
1184 const char **p = d? audiod_args_info_detailed_help
1185 : audiod_args_info_help;
1187 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1188 AUDIOD_CMDLINE_PARSER_VERSION);
1189 printf_or_die("%s\n\n", audiod_args_info_usage);
1191 printf_or_die("%s\n", *p);
1192 print_receiver_helps(d);
1193 print_filter_helps(d);
1194 print_writer_helps(d);
1198 static void init_colors_or_die(void)
1204 daemon_set_default_log_colors();
1205 daemon_set_flag(DF_COLOR_LOG);
1206 for (i = 0; i < conf.log_color_given; i++) {
1207 ret = daemon_set_log_color(conf.log_color_arg[i]);
1214 * the main function of para_audiod
1216 * \param argc usual argument count
1217 * \param argv usual argument vector
1219 * \return EXIT_SUCCESS or EXIT_FAILURE
1221 * \sa para_audiod(1)
1223 int main(int argc, char *argv[])
1226 static struct sched s;
1227 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1228 struct audiod_cmdline_parser_params params = {
1231 .check_required = 0,
1232 .check_ambiguity = 0,
1237 if (audiod_cmdline_parser_ext(argc, argv, &conf, ¶ms))
1239 HANDLE_VERSION_FLAG("audiod", conf);
1240 /* init receivers/filters/writers early to make help work */
1244 if (conf.help_given || conf.detailed_help_given)
1245 print_help_and_die();
1246 drop_privileges_or_die(conf.user_arg, conf.group_arg);
1247 parse_config_or_die();
1248 init_colors_or_die();
1249 init_random_seed_or_die();
1250 daemon_set_flag(DF_LOG_TIME);
1251 daemon_set_flag(DF_LOG_HOSTNAME);
1252 daemon_set_flag(DF_LOG_LL);
1253 if (conf.log_timing_given)
1254 daemon_set_flag(DF_LOG_TIMING);
1255 if (conf.logfile_given) {
1256 daemon_set_logfile(conf.logfile_arg);
1257 daemon_open_log_or_die();
1259 ret = parse_stream_args();
1261 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1264 log_welcome("para_audiod");
1265 server_uptime(UPTIME_SET);
1266 set_initial_status();
1269 setup_signal_handling();
1270 signal_setup_default(sig_task);
1272 init_status_task(stat_task);
1273 init_command_task(cmd_task);
1275 if (conf.daemon_given)
1278 register_task(&sig_task->task);
1279 register_task(&cmd_task->task);
1280 register_task(&stat_task->task);
1281 s.default_timeout.tv_sec = 2;
1282 s.default_timeout.tv_usec = 999 * 1000;
1285 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1286 return EXIT_FAILURE;