2 * Copyright (C) 2005-2008 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 */
13 #include "audiod.cmdline.h"
18 #include "grab_client.cmdline.h"
19 #include "grab_client.h"
20 #include "client.cmdline.h"
28 #include "write_common.h"
31 /** define the array of error lists needed by para_audiod */
33 /** define the array containing all supported audio formats */
34 const char *audio_formats
[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL
};
36 /** Defines how audiod handles one supported audio format. */
37 struct audio_format_info
{
38 /** pointer to the receiver for this audio format */
39 struct receiver
*receiver
;
40 /** the receiver configuration */
42 /** the number of filters that should be activated for this audio format */
43 unsigned int num_filters
;
44 /** pointer to the array of filters to be activated */
45 struct filter
**filters
;
46 /** pointer to the array of filter configurations */
48 /** the number of filters that should be activated for this audio format */
49 unsigned int num_writers
;
50 /** pointer to the array of writers to be activated */
51 struct writer
**writers
;
52 /** pointer to the array of writer configurations */
54 /** do not start receiver/filters/writer before this time */
55 struct timeval restart_barrier
;
59 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
60 * be associated with a receiver/filter/writer triple. This array holds all
61 * information on the status of these slots.
63 * \sa struct slot_info
65 struct slot_info slot
[MAX_STREAM_SLOTS
];
69 * the current mode of operation of which can be changed by the on/off/cycle
70 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
72 int audiod_status
= AUDIOD_ON
;
75 * the gengetopt args_info struct that holds information on all command line
78 struct audiod_args_info conf
;
80 static char *socket_name
;
82 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
84 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
86 static struct status_task status_task_struct
;
89 * the task that calls the status command of para_server
91 * \sa struct status_task
93 struct status_task
*stat_task
= &status_task_struct
;
94 static struct timeval initial_delay_barrier
;
97 * the task for handling audiod commands
99 * \sa struct task, struct sched
101 struct command_task
{
102 /** the local listening socket */
104 /** the associated task structure */
108 /** iterate over all supported audio formats */
109 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
112 * get the audio format number
113 * \param name the name of the audio format
115 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
116 * \a name is not a supported audio format.
118 int get_audio_format_num(char *name
)
122 while (para_isspace(*name
))
124 FOR_EACH_AUDIO_FORMAT(i
)
125 if (!strcmp(name
, audio_formats
[i
]))
127 return -E_UNSUPPORTED_AUDIO_FORMAT
;
131 * the log function of para_audiod
134 * \param fmt the format string
136 void para_log(int ll
, const char* fmt
,...)
142 char str
[MAXLINE
] = "";
143 static char *hostname
;
145 if (ll
< conf
.loglevel_arg
)
147 if (!logfile
&& conf
.daemon_given
)
150 hostname
= para_hostname();
151 outfd
= logfile
? logfile
: stderr
;
154 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
155 fprintf(outfd
, "%s %s ", str
, hostname
);
156 if (conf
.loglevel_arg
<= INFO
)
157 fprintf(outfd
, "%i ", ll
);
159 vfprintf(outfd
, fmt
, argp
);
163 static char *configfile_exists(void)
165 char *home
= para_homedir();
166 char *config_file
= make_message("%s/.paraslash/audiod.conf",
169 if (file_exists(config_file
))
175 static void setup_signal_handling(void)
177 sig_task
->fd
= para_signal_init();
178 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
179 para_install_sighandler(SIGINT
);
180 para_install_sighandler(SIGTERM
);
181 para_install_sighandler(SIGHUP
);
182 signal(SIGPIPE
, SIG_IGN
);
185 static void clear_slot(int slot_num
)
187 struct slot_info
*s
= &slot
[slot_num
];
189 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
190 memset(s
, 0, sizeof(struct slot_info
));
194 static void close_receiver(int slot_num
)
196 struct slot_info
*s
= &slot
[slot_num
];
197 struct audio_format_info
*a
;
199 if (s
->format
< 0 || !s
->receiver_node
)
202 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
203 audio_formats
[s
->format
], slot_num
);
204 a
->receiver
->close(s
->receiver_node
);
205 free(s
->receiver_node
);
206 s
->receiver_node
= NULL
;
209 static void kill_all_decoders(int error
)
214 struct slot_info
*s
= &slot
[i
];
215 if (s
->wng
&& !s
->wng
->task
.error
) {
216 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
218 wng_unregister(s
->wng
);
219 s
->wng
->task
.error
= error
;
221 if (s
->fc
&& !s
->fc
->task
.error
) {
222 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i
);
223 unregister_task(&s
->fc
->task
);
224 s
->fc
->task
.error
= error
;
226 if (s
->receiver_node
&& !s
->receiver_node
->task
.error
) {
227 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i
);
228 unregister_task(&s
->receiver_node
->task
);
229 s
->receiver_node
->task
.error
= error
;
234 static int get_empty_slot(void)
245 if (s
->wng
|| s
->receiver_node
|| s
->fc
)
250 return -E_NO_MORE_SLOTS
;
254 * get the number of filters
256 * \param audio_format_num the number identifying the audio format
258 * \return the number of filters for the given audio format
262 int num_filters(int audio_format_num
)
264 return afi
[audio_format_num
].num_filters
;
267 static void open_filters(int slot_num
)
269 struct slot_info
*s
= &slot
[slot_num
];
270 struct audio_format_info
*a
= &afi
[s
->format
];
271 int nf
= a
->num_filters
;
277 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
278 s
->fc
= para_calloc(sizeof(struct filter_chain
));
279 INIT_LIST_HEAD(&s
->fc
->filters
);
280 s
->fc
->inbuf
= s
->receiver_node
->buf
;
281 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
282 s
->fc
->input_error
= &s
->receiver_node
->task
.error
;
283 s
->fc
->task
.pre_select
= filter_pre_select
;
284 s
->fc
->task
.error
= 0;
286 s
->receiver_node
->output_error
= &s
->fc
->task
.error
;
287 sprintf(s
->fc
->task
.status
, "filter chain");
288 for (i
= 0; i
< nf
; i
++) {
289 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
290 fn
->conf
= a
->filter_conf
[i
];
292 fn
->filter
= a
->filters
[i
];
293 INIT_LIST_HEAD(&fn
->callbacks
);
294 list_add_tail(&fn
->node
, &s
->fc
->filters
);
295 fn
->filter
->open(fn
);
296 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
297 audio_formats
[s
->format
], i
+ 1, nf
,
298 fn
->filter
->name
, slot_num
);
299 s
->fc
->outbuf
= fn
->buf
;
300 s
->fc
->out_loaded
= &fn
->loaded
;
302 register_task(&s
->fc
->task
);
305 static void open_writers(int slot_num
)
308 struct slot_info
*s
= &slot
[slot_num
];
309 struct audio_format_info
*a
= &afi
[s
->format
];
311 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
313 s
->wng
= setup_default_wng();
315 s
->wng
= wng_new(a
->num_writers
);
317 s
->wng
->buf
= s
->fc
->outbuf
;
318 s
->wng
->loaded
= s
->fc
->out_loaded
;
319 s
->wng
->input_error
= &s
->fc
->task
.error
;
320 s
->wng
->channels
= &s
->fc
->channels
;
321 s
->wng
->samplerate
= &s
->fc
->samplerate
;
322 s
->fc
->output_error
= &s
->wng
->task
.error
;
323 PARA_INFO_LOG("samplerate: %d\n", *s
->wng
->samplerate
);
325 s
->wng
->buf
= s
->receiver_node
->buf
;
326 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
327 s
->wng
->input_error
= &s
->receiver_node
->task
.error
;
329 for (i
= 0; i
< a
->num_writers
; i
++) {
330 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
331 s
->wng
->writer_nodes
[i
].writer
= a
->writers
[i
];
333 ret
= wng_open(s
->wng
);
335 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
339 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fc
->filters
);
343 static void rn_event_handler(struct task
*t
)
345 struct receiver_node
*rn
= t
->private_data
;
348 PARA_NOTICE_LOG("%s\n", para_strerror(-t
->ret
));
351 /* set restart barrier */
353 struct timeval restart_delay
= {0, 10 * 1000};
354 if (slot
[i
].receiver_node
!= rn
)
356 if (rn
->error
!= -E_RECV_EOF
)
357 /* don't reconnect immediately on errors */
358 restart_delay
.tv_sec
= 5;
359 tv_add(now
, &restart_delay
, &afi
[slot
[i
].format
].restart_barrier
);
364 static int open_receiver(int format
)
366 struct audio_format_info
*a
= &afi
[format
];
369 struct receiver_node
*rn
;
370 const struct timeval restart_delay
= {1, 0};
372 ret
= get_empty_slot();
378 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
379 rn
= s
->receiver_node
;
380 rn
->receiver
= a
->receiver
;
381 rn
->conf
= a
->receiver_conf
;
382 ret
= a
->receiver
->open(s
->receiver_node
);
384 free(s
->receiver_node
);
385 s
->receiver_node
= NULL
;
388 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
389 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
390 rn
->task
.pre_select
= a
->receiver
->pre_select
;
391 rn
->task
.post_select
= a
->receiver
->post_select
;
392 sprintf(rn
->task
.status
, "%s receiver node", rn
->receiver
->name
);
393 register_task(&rn
->task
);
396 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
397 tv_add(now
, &restart_delay
, &afi
[format
].restart_barrier
);
401 static int receiver_running(int format
)
406 struct slot_info
*s
= &slot
[i
];
407 if (s
->format
== format
&& s
->receiver_node
408 && s
->receiver_node
->task
.error
>= 0)
414 static int open_current_receiver(struct sched
*s
)
417 int cafn
= stat_task
->current_audio_format_num
;
419 if (cafn
< 0 || !stat_task
->ct
)
421 if (receiver_running(cafn
))
423 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, &diff
) < 0) {
427 return open_receiver(cafn
) < 0? 0 : 1;
430 static unsigned compute_time_diff(const struct timeval
*status_time
)
432 struct timeval tmp
, diff
;
433 static unsigned count
;
434 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
435 const struct timeval max_deviation
= {0, 500 * 1000};
436 const int time_smooth
= 5;
440 sign
= tv_diff(status_time
, now
, &diff
);
441 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
442 // sign, sa_time_diff_sign);
444 sa_time_diff_sign
= sign
;
445 stat_task
->sa_time_diff
= diff
;
450 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
451 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
452 PARA_WARNING_LOG("time diff jump: %lims\n",
456 sa_time_diff_sign
= tv_convex_combination(
457 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
458 count
> 10? sign
: sign
* time_smooth
, &diff
,
460 stat_task
->sa_time_diff
= tmp
;
461 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
464 sa_time_diff_sign
? "+" : "-",
465 tv2ms(&stat_task
->sa_time_diff
)
468 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
472 static int check_stat_line(char *line
, __a_unused
void *data
)
476 long unsigned sec
, usec
;
479 //PARA_INFO_LOG("line: %s\n", line);
482 itemnum
= stat_line_valid(line
);
484 PARA_WARNING_LOG("invalid status line: %s\n", line
);
487 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
489 tmp
= make_message("%s\n", line
);
490 stat_client_write(tmp
, itemnum
);
492 free(stat_task
->stat_item_values
[itemnum
]);
493 stat_task
->stat_item_values
[itemnum
] = para_strdup(line
);
494 ilen
= strlen(status_item_list
[itemnum
]);
497 stat_task
->playing
= strstr(line
, "playing")? 1 : 0;
498 PARA_INFO_LOG("stat task playing: %d\n", stat_task
->playing
);
501 stat_task
->offset_seconds
= atoi(line
+ ilen
+ 1);
503 case SI_SECONDS_TOTAL
:
504 stat_task
->length_seconds
= atoi(line
+ ilen
+ 1);
506 case SI_STREAM_START
:
507 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
508 struct timeval a_start
, delay
;
509 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
510 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
511 stat_task
->server_stream_start
.tv_sec
= sec
;
512 stat_task
->server_stream_start
.tv_usec
= usec
;
513 if (compute_time_diff(NULL
) > 2) {
514 if (stat_task
->sa_time_diff_sign
< 0)
515 tv_add(&stat_task
->server_stream_start
,
516 &stat_task
->sa_time_diff
, &a_start
);
518 tv_diff(&stat_task
->server_stream_start
,
519 &stat_task
->sa_time_diff
, &a_start
);
520 tv_add(&a_start
, &delay
, &initial_delay_barrier
);
524 case SI_CURRENT_TIME
:
525 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
526 struct timeval tv
= {sec
, usec
};
527 compute_time_diff(&tv
);
529 if (stat_task
->clock_diff_count
)
530 stat_task
->clock_diff_count
--;
533 stat_task
->current_audio_format_num
= get_audio_format_num(
539 static void try_to_close_slot(int slot_num
)
541 struct slot_info
*s
= &slot
[slot_num
];
545 if (s
->receiver_node
&& s
->receiver_node
->task
.error
>= 0)
547 if (s
->fc
&& s
->fc
->task
.error
>= 0)
549 if (s
->wng
&& s
->wng
->task
.error
>= 0)
551 PARA_INFO_LOG("closing slot %d\n", slot_num
);
553 close_filters(s
->fc
);
555 close_receiver(slot_num
);
556 clear_slot(slot_num
);
560 * Check if any receivers/filters/writers need to be started and do so if
561 * necessary. Since the pre_select function didn't have a chance yet to put
562 * file descriptors into the fd sets given by s, make the upcoming select()
563 * return immediately to avoid a long timeout in case we started something.
565 static void audiod_pre_select(struct sched
*s
, __a_unused
struct task
*t
)
568 struct timeval min_delay
= {0, 1};
570 if (audiod_status
!= AUDIOD_ON
|| !stat_task
->playing
)
571 return kill_all_decoders(-E_NOT_PLAYING
);
572 if (open_current_receiver(s
))
573 s
->timeout
= min_delay
;
575 struct slot_info
*sl
= &slot
[i
];
576 struct audio_format_info
*a
;
581 a
= &afi
[sl
->format
];
582 if (!sl
->receiver_node
)
584 if ((!a
->num_filters
|| sl
->fc
) && sl
->wng
)
585 continue; /* everything already started */
586 if (!a
->num_filters
) {
587 if (sl
->receiver_node
->loaded
&& !sl
->wng
) {
589 s
->timeout
= min_delay
;
593 if (sl
->receiver_node
->loaded
&& !sl
->fc
) {
595 s
->timeout
= min_delay
;
598 if (sl
->wng
|| !sl
->fc
|| !*sl
->fc
->out_loaded
)
600 if (tv_diff(now
, &initial_delay_barrier
, &diff
) > 0) {
602 s
->timeout
= min_delay
;
605 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff
));
606 if (tv_diff(&s
->timeout
, &diff
, NULL
) > 0) {
612 static void audiod_post_select(__a_unused
struct sched
*s
,
613 __a_unused
struct task
*t
)
618 try_to_close_slot(i
);
621 static void init_audiod_task(struct task
*t
)
623 t
->pre_select
= audiod_pre_select
;
624 t
->post_select
= audiod_post_select
;
626 sprintf(t
->status
, "audiod task");
629 static int parse_stream_command(const char *txt
, char **cmd
)
631 char *p
= strchr(txt
, ':');
635 return -E_MISSING_COLON
;
637 FOR_EACH_AUDIO_FORMAT(i
) {
638 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
643 return -E_UNSUPPORTED_AUDIO_FORMAT
;
646 static int add_filter(int format
, char *cmdline
)
648 struct audio_format_info
*a
= &afi
[format
];
649 int filter_num
, nf
= a
->num_filters
;
651 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
654 a
->filters
[nf
] = &filters
[filter_num
];
656 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
657 a
->filters
[nf
]->name
);
661 static int init_writers(void)
665 struct audio_format_info
*a
;
667 init_supported_writers();
668 nw
= PARA_MAX(1, conf
.writer_given
);
669 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
670 FOR_EACH_AUDIO_FORMAT(i
) {
672 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
673 a
->writers
= para_malloc(nw
* sizeof(struct writer
*));
676 for (i
= 0; i
< conf
.writer_given
; i
++) {
679 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
684 wconf
= check_writer_arg(cmd
, &writer_num
);
689 a
->writers
[nw
] = &writers
[writer_num
];
690 a
->writer_conf
[nw
] = wconf
;
691 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
692 nw
, writer_names
[writer_num
]);
700 static int init_receivers(void)
702 int i
, ret
, receiver_num
;
704 struct audio_format_info
*a
;
706 for (i
= 0; receivers
[i
].name
; i
++) {
707 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
708 receivers
[i
].init(&receivers
[i
]);
710 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
711 char *arg
= conf
.receiver_arg
[i
];
712 char *recv_arg
= strchr(arg
, ':');
713 ret
= -E_MISSING_COLON
;
718 ret
= get_audio_format_num(arg
);
721 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
722 if (!afi
[ret
].receiver_conf
) {
723 ret
= -E_RECV_SYNTAX
;
726 afi
[ret
].receiver
= &receivers
[receiver_num
];
728 /* use the first available receiver with no arguments
729 * for those audio formats for which no receiver
732 cmd
= para_strdup(receivers
[0].name
);
733 FOR_EACH_AUDIO_FORMAT(i
) {
735 if (a
->receiver_conf
)
737 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
738 if (!a
->receiver_conf
)
739 return -E_RECV_SYNTAX
;
740 a
->receiver
= &receivers
[receiver_num
];
748 static int init_default_filters(void)
752 FOR_EACH_AUDIO_FORMAT(i
) {
753 struct audio_format_info
*a
= &afi
[i
];
758 continue; /* no default -- nothing to to */
759 /* add "dec" to audio format name */
760 tmp
= make_message("%sdec", audio_formats
[i
]);
761 for (j
= 0; filters
[j
].name
; j
++)
762 if (!strcmp(tmp
, filters
[j
].name
))
765 ret
= -E_UNSUPPORTED_FILTER
;
766 if (!filters
[j
].name
)
768 tmp
= para_strdup(filters
[j
].name
);
769 ret
= add_filter(i
, tmp
);
773 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
780 static int init_filters(void)
784 filter_init(filters
);
785 nf
= PARA_MAX(1, 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
].filters
= para_malloc(nf
* sizeof(struct filter
*));
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 init_stream_io(void)
817 ret
= init_writers();
820 ret
= init_receivers();
823 ret
= init_filters();
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
);
875 if (!FD_ISSET(st
->fd
, &s
->rfds
))
878 signum
= para_next_signal();
883 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
884 clean_exit(EXIT_FAILURE
, "caught deadly signal");
888 static void signal_setup_default(struct signal_task
*st
)
890 st
->task
.pre_select
= signal_pre_select
;
891 st
->task
.post_select
= signal_post_select
;
892 sprintf(st
->task
.status
, "signal task");
895 static void command_pre_select(struct sched
*s
, struct task
*t
)
897 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
898 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
901 static void command_post_select(struct sched
*s
, struct task
*t
)
904 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
906 audiod_status_dump();
907 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
909 ret
= handle_connect(ct
->fd
);
911 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
914 static void init_command_task(struct command_task
*ct
)
916 ct
->task
.pre_select
= command_pre_select
;
917 ct
->task
.post_select
= command_post_select
;
919 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
920 sprintf(ct
->task
.status
, "command task");
923 static void close_stat_pipe(void)
929 client_close(stat_task
->ct
);
930 stat_task
->ct
= NULL
;
931 FOR_EACH_STATUS_ITEM(i
) {
932 free(stat_task
->stat_item_values
[i
]);
933 stat_task
->stat_item_values
[i
] = NULL
;
936 stat_task
->length_seconds
= 0;
937 stat_task
->offset_seconds
= 0;
938 audiod_status_dump();
939 stat_task
->playing
= 0;
940 stat_task
->stat_item_values
[SI_BASENAME
] = make_message(
941 "%s: no connection to para_server\n",
942 status_item_list
[SI_BASENAME
]);
943 stat_client_write(stat_task
->stat_item_values
[SI_BASENAME
],
945 if (stat_task
->clock_diff_count
) {
946 stat_task
->clock_diff_barrier
.tv_sec
= now
->tv_sec
+ 1;
947 stat_task
->clock_diff_barrier
.tv_usec
= now
->tv_usec
;
952 * close the connection to para_server and exit
954 * \param status the exit status which is passed to exit(3)
955 * \param msg the log message
957 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
958 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
963 void __noreturn
clean_exit(int status
, const char *msg
)
965 PARA_EMERG_LOG("%s\n", msg
);
972 /* avoid busy loop if server is down */
973 static void set_stat_task_restart_barrier(void)
975 struct timeval delay
= {5, 0};
976 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
980 static void client_task_event_handler(__a_unused
struct task
*t
)
984 if (t
->ret
== -E_HANDSHAKE_COMPLETE
)
988 if (t
->ret
!= -E_SERVER_EOF
)
989 stat_task
->clock_diff_count
= conf
.clock_diff_count_arg
;
990 set_stat_task_restart_barrier();
991 FOR_EACH_AUDIO_FORMAT(i
)
992 afi
[i
].restart_barrier
= stat_task
->restart_barrier
;
996 static void status_pre_select(struct sched
*s
, struct task
*t
)
998 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1001 if (st
->ct
|| audiod_status
== AUDIOD_OFF
)
1003 if (!st
->clock_diff_count
&& tv_diff(now
, &st
->restart_barrier
, NULL
)
1006 if (st
->clock_diff_count
) {
1007 char *argv
[] = {"audiod", "stat", "1", NULL
};
1009 if (tv_diff(now
, &st
->clock_diff_barrier
, NULL
) < 0)
1011 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1012 ret
= client_open(argc
, argv
, &st
->ct
);
1015 char *argv
[] = {"audiod", "stat", NULL
};
1017 ret
= client_open(argc
, argv
, &st
->ct
);
1019 set_stat_task_restart_barrier();
1022 s
->timeout
.tv_sec
= 0;
1023 s
->timeout
.tv_usec
= 1;
1026 static void status_post_select(__a_unused
struct sched
*s
, struct task
*t
)
1028 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1029 unsigned bytes_left
;
1031 if (!st
->ct
|| st
->ct
->status
!= CL_RECEIVING
)
1033 if (st
->ct
&& audiod_status
== AUDIOD_OFF
) {
1034 unregister_task(&st
->ct
->task
);
1036 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1039 bytes_left
= for_each_line(st
->ct
->buf
, st
->ct
->loaded
,
1040 &check_stat_line
, NULL
);
1041 if (st
->ct
->loaded
!= bytes_left
) {
1042 st
->last_status_read
= *now
;
1043 st
->ct
->loaded
= bytes_left
;
1045 struct timeval diff
;
1046 tv_diff(now
, &st
->last_status_read
, &diff
);
1047 if (diff
.tv_sec
> 61)
1052 static void init_status_task(struct status_task
*st
)
1054 memset(st
, 0, sizeof(struct status_task
));
1055 st
->task
.pre_select
= status_pre_select
;
1056 st
->task
.post_select
= status_post_select
;
1057 st
->sa_time_diff_sign
= 1;
1058 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1059 st
->current_audio_format_num
= -1;
1060 sprintf(st
->task
.status
, "status task");
1063 static void set_initial_status(void)
1065 audiod_status
= AUDIOD_ON
;
1066 if (!conf
.mode_given
)
1068 if (!strcmp(conf
.mode_arg
, "sb")) {
1069 audiod_status
= AUDIOD_STANDBY
;
1072 if (!strcmp(conf
.mode_arg
, "off")) {
1073 audiod_status
= AUDIOD_OFF
;
1076 if (strcmp(conf
.mode_arg
, "on"))
1077 PARA_WARNING_LOG("invalid mode\n");
1081 * the main function of para_audiod
1083 * \param argc usual argument count
1084 * \param argv usual argument vector
1086 * \return EXIT_SUCCESS or EXIT_FAILURE
1088 * \sa para_audiod(1)
1090 int main(int argc
, char *argv
[])
1095 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1096 struct task audiod_task_struct
, *audiod_task
= &audiod_task_struct
;
1099 audiod_cmdline_parser(argc
, argv
, &conf
);
1100 HANDLE_VERSION_FLAG("audiod", conf
);
1101 para_drop_privileges(conf
.user_arg
, conf
.group_arg
);
1102 config_file
= configfile_exists();
1104 struct audiod_cmdline_parser_params params
= {
1107 .check_required
= 0,
1108 .check_ambiguity
= 0
1111 if (audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
)) {
1112 PARA_EMERG_LOG("parse error in config file\n");
1117 if (conf
.logfile_given
)
1118 logfile
= open_log(conf
.logfile_arg
);
1119 log_welcome("para_audiod", conf
.loglevel_arg
);
1120 i
= init_stream_io();
1122 PARA_EMERG_LOG("init stream io error: %s\n", para_strerror(-i
));
1125 server_uptime(UPTIME_SET
);
1126 set_initial_status();
1130 setup_signal_handling();
1131 signal_setup_default(sig_task
);
1133 init_status_task(stat_task
);
1134 init_command_task(cmd_task
);
1135 init_audiod_task(audiod_task
);
1137 if (conf
.daemon_given
)
1140 register_task(&sig_task
->task
);
1141 register_task(&cmd_task
->task
);
1142 register_task(&stat_task
->task
);
1143 register_task(audiod_task
);
1144 s
.default_timeout
.tv_sec
= 0;
1145 s
.default_timeout
.tv_usec
= 99 * 1000;
1148 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1149 return EXIT_FAILURE
;