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
->error
) {
216 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
218 wng_unregister(s
->wng
);
219 s
->wng
->error
= error
;
221 if (s
->fc
&& !s
->fc
->error
) {
222 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i
);
223 unregister_task(&s
->fc
->task
);
224 s
->fc
->error
= error
;
226 if (s
->receiver_node
&& !s
->receiver_node
->error
) {
227 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i
);
228 unregister_task(&s
->receiver_node
->task
);
229 s
->receiver_node
->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 filter_event_handler(struct task
*t
)
269 PARA_NOTICE_LOG("%s\n", para_strerror(-t
->ret
));
270 struct filter_chain
*fc
= t
->private_data
;
275 static void open_filters(int slot_num
)
277 struct slot_info
*s
= &slot
[slot_num
];
278 struct audio_format_info
*a
= &afi
[s
->format
];
279 int nf
= a
->num_filters
;
285 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
286 s
->fc
= para_calloc(sizeof(struct filter_chain
));
287 INIT_LIST_HEAD(&s
->fc
->filters
);
288 s
->fc
->inbuf
= s
->receiver_node
->buf
;
289 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
290 s
->fc
->input_error
= &s
->receiver_node
->error
;
291 s
->fc
->task
.pre_select
= filter_pre_select
;
292 s
->fc
->task
.event_handler
= filter_event_handler
;
293 s
->fc
->task
.private_data
= s
->fc
;
296 s
->receiver_node
->output_error
= &s
->fc
->error
;
297 sprintf(s
->fc
->task
.status
, "filter chain");
298 for (i
= 0; i
< nf
; i
++) {
299 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
300 fn
->conf
= a
->filter_conf
[i
];
302 fn
->filter
= a
->filters
[i
];
303 INIT_LIST_HEAD(&fn
->callbacks
);
304 list_add_tail(&fn
->node
, &s
->fc
->filters
);
305 fn
->filter
->open(fn
);
306 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
307 audio_formats
[s
->format
], i
+ 1, nf
,
308 fn
->filter
->name
, slot_num
);
309 s
->fc
->outbuf
= fn
->buf
;
310 s
->fc
->out_loaded
= &fn
->loaded
;
312 register_task(&s
->fc
->task
);
315 static void wng_event_handler(struct task
*t
)
317 struct writer_node_group
*wng
= t
->private_data
;
319 PARA_INFO_LOG("%s\n", para_strerror(-t
->ret
));
324 static void open_writers(int slot_num
)
327 struct slot_info
*s
= &slot
[slot_num
];
328 struct audio_format_info
*a
= &afi
[s
->format
];
330 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
332 s
->wng
= setup_default_wng();
334 s
->wng
= wng_new(a
->num_writers
);
336 s
->wng
->buf
= s
->fc
->outbuf
;
337 s
->wng
->loaded
= s
->fc
->out_loaded
;
338 s
->wng
->input_error
= &s
->fc
->error
;
339 s
->wng
->channels
= &s
->fc
->channels
;
340 s
->wng
->samplerate
= &s
->fc
->samplerate
;
341 s
->fc
->output_error
= &s
->wng
->error
;
342 PARA_INFO_LOG("samplerate: %d\n", *s
->wng
->samplerate
);
344 s
->wng
->buf
= s
->receiver_node
->buf
;
345 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
346 s
->wng
->input_error
= &s
->receiver_node
->error
;
348 s
->wng
->task
.event_handler
= wng_event_handler
;
349 for (i
= 0; i
< a
->num_writers
; i
++) {
350 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
351 s
->wng
->writer_nodes
[i
].writer
= a
->writers
[i
];
353 ret
= wng_open(s
->wng
);
355 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
359 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fc
->filters
);
362 static void rn_event_handler(struct task
*t
)
364 struct receiver_node
*rn
= t
->private_data
;
367 PARA_NOTICE_LOG("%s\n", para_strerror(-t
->ret
));
370 /* set restart barrier */
372 struct timeval restart_delay
= {0, 10 * 1000};
373 if (slot
[i
].receiver_node
!= rn
)
375 if (rn
->error
!= -E_RECV_EOF
)
376 /* don't reconnect immediately on errors */
377 restart_delay
.tv_sec
= 5;
378 tv_add(now
, &restart_delay
, &afi
[slot
[i
].format
].restart_barrier
);
382 static int open_receiver(int format
)
384 struct audio_format_info
*a
= &afi
[format
];
387 struct receiver_node
*rn
;
388 const struct timeval restart_delay
= {1, 0};
390 ret
= get_empty_slot();
396 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
397 rn
= s
->receiver_node
;
398 rn
->receiver
= a
->receiver
;
399 rn
->conf
= a
->receiver_conf
;
400 ret
= a
->receiver
->open(s
->receiver_node
);
402 free(s
->receiver_node
);
403 s
->receiver_node
= NULL
;
406 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
407 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
408 rn
->task
.private_data
= s
->receiver_node
;
409 rn
->task
.pre_select
= a
->receiver
->pre_select
;
410 rn
->task
.post_select
= a
->receiver
->post_select
;
411 rn
->task
.event_handler
= rn_event_handler
;
412 sprintf(rn
->task
.status
, "%s receiver node", rn
->receiver
->name
);
413 register_task(&rn
->task
);
416 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
417 tv_add(now
, &restart_delay
, &afi
[format
].restart_barrier
);
421 static int receiver_running(int format
)
426 struct slot_info
*s
= &slot
[i
];
427 if (s
->format
== format
&& s
->receiver_node
428 && !s
->receiver_node
->error
)
434 static int open_current_receiver(struct sched
*s
)
437 int cafn
= stat_task
->current_audio_format_num
;
439 if (cafn
< 0 || !stat_task
->pcd
)
441 if (receiver_running(cafn
))
443 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, &diff
) < 0) {
447 return open_receiver(cafn
) < 0? 0 : 1;
450 static unsigned compute_time_diff(const struct timeval
*status_time
)
452 struct timeval tmp
, diff
;
453 static unsigned count
;
454 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
455 const struct timeval max_deviation
= {0, 500 * 1000};
456 const int time_smooth
= 5;
460 sign
= tv_diff(status_time
, now
, &diff
);
461 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
462 // sign, sa_time_diff_sign);
464 sa_time_diff_sign
= sign
;
465 stat_task
->sa_time_diff
= diff
;
470 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
471 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
472 PARA_WARNING_LOG("time diff jump: %lims\n",
476 sa_time_diff_sign
= tv_convex_combination(
477 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
478 count
> 10? sign
: sign
* time_smooth
, &diff
,
480 stat_task
->sa_time_diff
= tmp
;
481 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
484 sa_time_diff_sign
? "+" : "-",
485 tv2ms(&stat_task
->sa_time_diff
)
488 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
492 static int check_stat_line(char *line
, __a_unused
void *data
)
496 long unsigned sec
, usec
;
499 // PARA_INFO_LOG("line: %s\n", line);
502 itemnum
= stat_line_valid(line
);
504 PARA_WARNING_LOG("invalid status line: %s\n", line
);
507 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
509 tmp
= make_message("%s\n", line
);
510 stat_client_write(tmp
, itemnum
);
512 free(stat_task
->stat_item_values
[itemnum
]);
513 stat_task
->stat_item_values
[itemnum
] = para_strdup(line
);
514 ilen
= strlen(status_item_list
[itemnum
]);
517 stat_task
->playing
= strstr(line
, "playing")? 1 : 0;
520 stat_task
->offset_seconds
= atoi(line
+ ilen
+ 1);
522 case SI_SECONDS_TOTAL
:
523 stat_task
->length_seconds
= atoi(line
+ ilen
+ 1);
525 case SI_STREAM_START
:
526 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
527 struct timeval a_start
, delay
;
528 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
529 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
530 stat_task
->server_stream_start
.tv_sec
= sec
;
531 stat_task
->server_stream_start
.tv_usec
= usec
;
532 if (compute_time_diff(NULL
) > 2) {
533 if (stat_task
->sa_time_diff_sign
< 0)
534 tv_add(&stat_task
->server_stream_start
,
535 &stat_task
->sa_time_diff
, &a_start
);
537 tv_diff(&stat_task
->server_stream_start
,
538 &stat_task
->sa_time_diff
, &a_start
);
539 tv_add(&a_start
, &delay
, &initial_delay_barrier
);
543 case SI_CURRENT_TIME
:
544 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
545 struct timeval tv
= {sec
, usec
};
546 compute_time_diff(&tv
);
548 if (stat_task
->clock_diff_count
)
549 stat_task
->clock_diff_count
--;
552 stat_task
->current_audio_format_num
= get_audio_format_num(
558 static void try_to_close_slot(int slot_num
)
560 struct slot_info
*s
= &slot
[slot_num
];
564 if (s
->receiver_node
&& !s
->receiver_node
->error
)
566 if (s
->fc
&& !s
->fc
->error
)
568 if (s
->wng
&& !s
->wng
->error
)
570 PARA_INFO_LOG("closing slot %d\n", slot_num
);
572 close_filters(s
->fc
);
574 close_receiver(slot_num
);
575 clear_slot(slot_num
);
579 * Check if any receivers/filters/writers need to be started and do so if
580 * necessary. Since the pre_select function didn't have a chance yet to put
581 * file descriptors into the fd sets given by s, make the upcoming select()
582 * return immediately to avoid a long timeout in case we started something.
584 static void audiod_pre_select(struct sched
*s
, __a_unused
struct task
*t
)
587 struct timeval min_delay
= {0, 1};
590 if (audiod_status
!= AUDIOD_ON
|| !stat_task
->playing
)
591 return kill_all_decoders(-E_NOT_PLAYING
);
592 if (open_current_receiver(s
))
593 s
->timeout
= min_delay
;
595 struct slot_info
*sl
= &slot
[i
];
596 struct audio_format_info
*a
;
601 a
= &afi
[sl
->format
];
602 if (!sl
->receiver_node
)
604 if ((!a
->num_filters
|| sl
->fc
) && sl
->wng
)
605 continue; /* everything already started */
606 if (!a
->num_filters
) {
607 if (sl
->receiver_node
->loaded
&& !sl
->wng
) {
609 s
->timeout
= min_delay
;
613 if (sl
->receiver_node
->loaded
&& !sl
->fc
) {
615 s
->timeout
= min_delay
;
618 if (sl
->wng
|| !sl
->fc
|| !*sl
->fc
->out_loaded
)
620 if (tv_diff(now
, &initial_delay_barrier
, &diff
) > 0) {
622 s
->timeout
= min_delay
;
625 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff
));
626 if (tv_diff(&s
->timeout
, &diff
, NULL
) > 0) {
632 static void audiod_post_select(__a_unused
struct sched
*s
,
633 __a_unused
struct task
*t
)
639 try_to_close_slot(i
);
642 static void init_audiod_task(struct task
*t
)
644 t
->pre_select
= audiod_pre_select
;
645 t
->post_select
= audiod_post_select
;
646 t
->event_handler
= NULL
;
648 sprintf(t
->status
, "audiod task");
651 static int parse_stream_command(const char *txt
, char **cmd
)
653 char *p
= strchr(txt
, ':');
657 return -E_MISSING_COLON
;
659 FOR_EACH_AUDIO_FORMAT(i
) {
660 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
665 return -E_UNSUPPORTED_AUDIO_FORMAT
;
668 static int add_filter(int format
, char *cmdline
)
670 struct audio_format_info
*a
= &afi
[format
];
671 int filter_num
, nf
= a
->num_filters
;
673 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
676 a
->filters
[nf
] = &filters
[filter_num
];
678 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
679 a
->filters
[nf
]->name
);
683 static int init_writers(void)
687 struct audio_format_info
*a
;
689 init_supported_writers();
690 nw
= PARA_MAX(1, conf
.writer_given
);
691 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
692 FOR_EACH_AUDIO_FORMAT(i
) {
694 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
695 a
->writers
= para_malloc(nw
* sizeof(struct writer
*));
698 for (i
= 0; i
< conf
.writer_given
; i
++) {
701 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
706 wconf
= check_writer_arg(cmd
, &writer_num
);
711 a
->writers
[nw
] = &writers
[writer_num
];
712 a
->writer_conf
[nw
] = wconf
;
713 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
714 nw
, writer_names
[writer_num
]);
722 static int init_receivers(void)
724 int i
, ret
, receiver_num
;
726 struct audio_format_info
*a
;
728 for (i
= 0; receivers
[i
].name
; i
++) {
729 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
730 receivers
[i
].init(&receivers
[i
]);
732 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
733 char *arg
= conf
.receiver_arg
[i
];
734 char *recv_arg
= strchr(arg
, ':');
735 ret
= -E_MISSING_COLON
;
740 ret
= get_audio_format_num(arg
);
743 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
744 if (!afi
[ret
].receiver_conf
) {
745 ret
= -E_RECV_SYNTAX
;
748 afi
[ret
].receiver
= &receivers
[receiver_num
];
750 /* use the first available receiver with no arguments
751 * for those audio formats for which no receiver
754 cmd
= para_strdup(receivers
[0].name
);
755 FOR_EACH_AUDIO_FORMAT(i
) {
757 if (a
->receiver_conf
)
759 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
760 if (!a
->receiver_conf
)
761 return -E_RECV_SYNTAX
;
762 a
->receiver
= &receivers
[receiver_num
];
770 static int init_default_filters(void)
774 FOR_EACH_AUDIO_FORMAT(i
) {
775 struct audio_format_info
*a
= &afi
[i
];
780 continue; /* no default -- nothing to to */
781 /* add "dec" to audio format name */
782 tmp
= make_message("%sdec", audio_formats
[i
]);
783 for (j
= 0; filters
[j
].name
; j
++)
784 if (!strcmp(tmp
, filters
[j
].name
))
787 ret
= -E_UNSUPPORTED_FILTER
;
788 if (!filters
[j
].name
)
790 tmp
= para_strdup(filters
[j
].name
);
791 ret
= add_filter(i
, tmp
);
795 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
802 static int init_filters(void)
806 filter_init(filters
);
807 nf
= PARA_MAX(1, conf
.filter_given
);
808 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
809 FOR_EACH_AUDIO_FORMAT(i
) {
810 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
811 afi
[i
].filters
= para_malloc(nf
* sizeof(struct filter
*));
813 if (!conf
.no_default_filters_given
)
814 return init_default_filters();
815 for (i
= 0; i
< conf
.filter_given
; i
++) {
816 char *arg
= conf
.filter_arg
[i
];
817 char *filter_name
= strchr(arg
, ':');
818 ret
= -E_MISSING_COLON
;
823 ret
= get_audio_format_num(arg
);
826 ret
= add_filter(ret
, filter_name
);
830 ret
= init_default_filters(); /* use default values for the rest */
835 static int init_stream_io(void)
839 ret
= init_writers();
842 ret
= init_receivers();
845 ret
= init_filters();
851 /* does not unlink socket on errors */
852 static int audiod_get_socket(void)
854 struct sockaddr_un unix_addr
;
857 if (conf
.socket_given
)
858 socket_name
= para_strdup(conf
.socket_arg
);
860 char *hn
= para_hostname();
861 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
865 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
866 if (conf
.force_given
)
868 ret
= create_local_socket(socket_name
, &unix_addr
,
869 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
873 if (listen(fd
, 5) < 0) {
874 ret
= -ERRNO_TO_PARA_ERROR(errno
);
877 ret
= mark_fd_nonblocking(fd
);
882 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
886 static void signal_event_handler(struct task
*t
)
888 struct signal_task
*st
= t
->private_data
;
890 switch (st
->signum
) {
894 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
895 clean_exit(EXIT_FAILURE
, "caught deadly signal");
899 static void signal_pre_select(struct sched
*s
, struct task
*t
)
901 struct signal_task
*st
= t
->private_data
;
903 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
906 static void signal_post_select(struct sched
*s
, struct task
*t
)
908 struct signal_task
*st
= t
->private_data
;
910 if (!FD_ISSET(st
->fd
, &s
->rfds
))
912 t
->ret
= -E_SIGNAL_CAUGHT
;
913 st
->signum
= para_next_signal();
916 static void signal_setup_default(struct signal_task
*st
)
918 st
->task
.pre_select
= signal_pre_select
;
919 st
->task
.post_select
= signal_post_select
;
920 st
->task
.private_data
= st
;
921 sprintf(st
->task
.status
, "signal task");
924 static void command_pre_select(struct sched
*s
, struct task
*t
)
926 struct command_task
*ct
= t
->private_data
;
928 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
932 static void command_post_select(struct sched
*s
, struct task
*t
)
935 struct command_task
*ct
= t
->private_data
;
937 t
->ret
= 1; /* always successful */
938 audiod_status_dump();
939 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
941 ret
= handle_connect(ct
->fd
);
943 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
946 static void init_command_task(struct command_task
*ct
)
948 ct
->task
.pre_select
= command_pre_select
;
949 ct
->task
.post_select
= command_post_select
;
950 ct
->task
.event_handler
= NULL
;
951 ct
->task
.private_data
= ct
;
952 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
953 sprintf(ct
->task
.status
, "command task");
956 static void close_stat_pipe(void)
962 client_close(stat_task
->pcd
);
963 stat_task
->pcd
= NULL
;
964 FOR_EACH_STATUS_ITEM(i
) {
965 free(stat_task
->stat_item_values
[i
]);
966 stat_task
->stat_item_values
[i
] = NULL
;
969 stat_task
->length_seconds
= 0;
970 stat_task
->offset_seconds
= 0;
971 audiod_status_dump();
972 stat_task
->playing
= 0;
973 stat_task
->stat_item_values
[SI_BASENAME
] = make_message(
974 "%s: no connection to para_server\n",
975 status_item_list
[SI_BASENAME
]);
976 stat_client_write(stat_task
->stat_item_values
[SI_BASENAME
],
978 if (stat_task
->clock_diff_count
) {
979 stat_task
->clock_diff_barrier
.tv_sec
= now
->tv_sec
+ 1;
980 stat_task
->clock_diff_barrier
.tv_usec
= now
->tv_usec
;
985 * close the connection to para_server and exit
987 * \param status the exit status which is passed to exit(3)
988 * \param msg the log message
990 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
991 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
996 void __noreturn
clean_exit(int status
, const char *msg
)
998 PARA_EMERG_LOG("%s\n", msg
);
1000 unlink(socket_name
);
1005 /* avoid busy loop if server is down */
1006 static void set_stat_task_restart_barrier(void)
1008 struct timeval delay
= {5, 0};
1009 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1012 static void client_task_event_handler(__a_unused
struct task
*t
)
1016 if (t
->ret
== -E_HANDSHAKE_COMPLETE
)
1020 if (t
->ret
!= -E_SERVER_EOF
)
1021 stat_task
->clock_diff_count
= conf
.clock_diff_count_arg
;
1022 set_stat_task_restart_barrier();
1023 FOR_EACH_AUDIO_FORMAT(i
)
1024 afi
[i
].restart_barrier
= stat_task
->restart_barrier
;
1027 static void status_pre_select(struct sched
*s
, struct task
*t
)
1029 struct status_task
*st
= t
->private_data
;
1032 t
->ret
= 1; /* always successful */
1033 if (st
->pcd
|| audiod_status
== AUDIOD_OFF
)
1035 if (!st
->clock_diff_count
&& tv_diff(now
, &st
->restart_barrier
, NULL
)
1038 if (st
->clock_diff_count
) {
1039 char *argv
[] = {"audiod", "stat", "1", NULL
};
1041 if (tv_diff(now
, &st
->clock_diff_barrier
, NULL
) < 0)
1043 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1044 ret
= client_open(argc
, argv
, &st
->pcd
);
1047 char *argv
[] = {"audiod", "stat", NULL
};
1049 ret
= client_open(argc
, argv
, &st
->pcd
);
1051 set_stat_task_restart_barrier();
1054 st
->pcd
->task
.event_handler
= client_task_event_handler
;
1055 s
->timeout
.tv_sec
= 0;
1056 s
->timeout
.tv_usec
= 1;
1059 static void status_post_select(__a_unused
struct sched
*s
, struct task
*t
)
1061 struct status_task
*st
= t
->private_data
;
1062 unsigned bytes_left
;
1065 if (!st
->pcd
|| st
->pcd
->status
!= CL_RECEIVING
)
1067 if (st
->pcd
&& audiod_status
== AUDIOD_OFF
) {
1068 unregister_task(&st
->pcd
->task
);
1070 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1073 bytes_left
= for_each_line(st
->pcd
->buf
, st
->pcd
->loaded
,
1074 &check_stat_line
, NULL
);
1075 if (st
->pcd
->loaded
!= bytes_left
) {
1076 st
->last_status_read
= *now
;
1077 st
->pcd
->loaded
= bytes_left
;
1079 struct timeval diff
;
1080 tv_diff(now
, &st
->last_status_read
, &diff
);
1081 if (diff
.tv_sec
> 61)
1086 static void init_status_task(struct status_task
*st
)
1088 memset(st
, 0, sizeof(struct status_task
));
1089 st
->task
.pre_select
= status_pre_select
;
1090 st
->task
.post_select
= status_post_select
;
1091 st
->task
.private_data
= st
;
1092 st
->sa_time_diff_sign
= 1;
1093 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1094 st
->current_audio_format_num
= -1;
1095 sprintf(st
->task
.status
, "status task");
1098 static void set_initial_status(void)
1100 audiod_status
= AUDIOD_ON
;
1101 if (!conf
.mode_given
)
1103 if (!strcmp(conf
.mode_arg
, "sb")) {
1104 audiod_status
= AUDIOD_STANDBY
;
1107 if (!strcmp(conf
.mode_arg
, "off")) {
1108 audiod_status
= AUDIOD_OFF
;
1111 if (strcmp(conf
.mode_arg
, "on"))
1112 PARA_WARNING_LOG("%s", "invalid mode\n");
1116 * the main function of para_audiod
1118 * \param argc usual argument count
1119 * \param argv usual argument vector
1121 * \return EXIT_SUCCESS or EXIT_FAILURE
1123 * \sa para_audiod(1)
1125 int main(int argc
, char *argv
[])
1130 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1131 struct task audiod_task_struct
, *audiod_task
= &audiod_task_struct
;
1134 audiod_cmdline_parser(argc
, argv
, &conf
);
1135 HANDLE_VERSION_FLAG("audiod", conf
);
1136 para_drop_privileges(conf
.user_arg
, conf
.group_arg
);
1137 config_file
= configfile_exists();
1139 struct audiod_cmdline_parser_params params
= {
1142 .check_required
= 0,
1143 .check_ambiguity
= 0
1146 if (audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
)) {
1147 PARA_EMERG_LOG("%s", "parse error in config file\n");
1152 if (conf
.logfile_given
)
1153 logfile
= open_log(conf
.logfile_arg
);
1154 log_welcome("para_audiod", conf
.loglevel_arg
);
1155 i
= init_stream_io();
1157 PARA_EMERG_LOG("init stream io error: %s\n", para_strerror(-i
));
1160 server_uptime(UPTIME_SET
);
1161 set_initial_status();
1165 setup_signal_handling();
1166 signal_setup_default(sig_task
);
1167 sig_task
->task
.event_handler
= signal_event_handler
;
1169 init_status_task(stat_task
);
1170 init_command_task(cmd_task
);
1171 init_audiod_task(audiod_task
);
1173 if (conf
.daemon_given
)
1176 register_task(&sig_task
->task
);
1177 register_task(&cmd_task
->task
);
1178 register_task(&stat_task
->task
);
1179 register_task(audiod_task
);
1180 s
.default_timeout
.tv_sec
= 0;
1181 s
.default_timeout
.tv_usec
= 99 * 1000;
1184 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1185 return EXIT_FAILURE
;