2 * Copyright (C) 2005-2007 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 to handle 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
)
121 FOR_EACH_AUDIO_FORMAT(i
)
122 if (!strcmp(name
, audio_formats
[i
]))
124 return -E_UNSUPPORTED_AUDIO_FORMAT
;
128 * the log function of para_audiod
131 * \param fmt the format string
133 void para_log(int ll
, const char* fmt
,...)
139 char str
[MAXLINE
] = "";
140 static char *hostname
;
142 if (ll
< conf
.loglevel_arg
)
145 hostname
= para_hostname();
146 outfd
= logfile
? logfile
: stderr
;
149 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
150 fprintf(outfd
, "%s %s ", str
, hostname
);
151 if (conf
.loglevel_arg
<= INFO
)
152 fprintf(outfd
, "%i ", ll
);
154 vfprintf(outfd
, fmt
, argp
);
158 static char *configfile_exists(void)
160 char *home
= para_homedir();
161 char *config_file
= make_message("%s/.paraslash/audiod.conf",
164 if (file_exists(config_file
))
170 static void setup_signal_handling(void)
172 sig_task
->fd
= para_signal_init();
173 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
174 para_install_sighandler(SIGINT
);
175 para_install_sighandler(SIGTERM
);
176 para_install_sighandler(SIGHUP
);
177 signal(SIGPIPE
, SIG_IGN
);
180 static void clear_slot(int slot_num
)
182 struct slot_info
*s
= &slot
[slot_num
];
184 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
185 memset(s
, 0, sizeof(struct slot_info
));
189 static void close_receiver(int slot_num
)
191 struct slot_info
*s
= &slot
[slot_num
];
192 struct audio_format_info
*a
;
194 if (s
->format
< 0 || !s
->receiver_node
)
197 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
198 audio_formats
[s
->format
] , slot_num
, s
->receiver_node
->eof
);
199 a
->receiver
->close(s
->receiver_node
);
200 free(s
->receiver_node
);
201 s
->receiver_node
= NULL
;
204 static void kill_all_decoders(void)
209 struct slot_info
*s
= &slot
[i
];
210 if (s
->wng
&& !s
->wng
->eof
) {
211 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
213 wng_unregister(s
->wng
);
216 if (s
->fc
&& !s
->fc
->eof
) {
217 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i
);
218 unregister_task(&s
->fc
->task
);
221 if (s
->receiver_node
&& !s
->receiver_node
->eof
) {
222 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i
);
223 unregister_task(&s
->receiver_node
->task
);
224 s
->receiver_node
->eof
= 1;
229 static int get_empty_slot(void)
240 if (s
->wng
|| s
->receiver_node
|| s
->fc
)
245 return -E_NO_MORE_SLOTS
;
249 * get the number of filters
251 * \param audio_format_num the number identifying the audio format
253 * \return the number of filters for the given audio format
257 int num_filters(int audio_format_num
)
259 return afi
[audio_format_num
].num_filters
;
262 static void filter_event_handler(struct task
*t
)
264 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
265 struct filter_chain
*fc
= t
->private_data
;
270 static void open_filters(int slot_num
)
272 struct slot_info
*s
= &slot
[slot_num
];
273 struct audio_format_info
*a
= &afi
[s
->format
];
274 int nf
= a
->num_filters
;
280 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
281 s
->fc
= para_calloc(sizeof(struct filter_chain
));
282 INIT_LIST_HEAD(&s
->fc
->filters
);
283 s
->fc
->inbuf
= s
->receiver_node
->buf
;
284 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
285 s
->fc
->input_eof
= &s
->receiver_node
->eof
;
286 s
->fc
->task
.pre_select
= filter_pre_select
;
287 s
->fc
->task
.event_handler
= filter_event_handler
;
288 s
->fc
->task
.private_data
= s
->fc
;
291 s
->receiver_node
->output_eof
= &s
->fc
->eof
;
292 sprintf(s
->fc
->task
.status
, "filter chain");
293 for (i
= 0; i
< nf
; i
++) {
294 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
295 fn
->conf
= a
->filter_conf
[i
];
297 fn
->filter
= a
->filters
[i
];
298 INIT_LIST_HEAD(&fn
->callbacks
);
299 list_add_tail(&fn
->node
, &s
->fc
->filters
);
300 fn
->filter
->open(fn
);
301 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
302 audio_formats
[s
->format
], i
+ 1, nf
,
303 fn
->filter
->name
, slot_num
);
304 s
->fc
->outbuf
= fn
->buf
;
305 s
->fc
->out_loaded
= &fn
->loaded
;
307 register_task(&s
->fc
->task
);
310 static void wng_event_handler(struct task
*t
)
312 struct writer_node_group
*wng
= t
->private_data
;
314 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t
->ret
));
319 static void open_writers(int slot_num
)
322 struct slot_info
*s
= &slot
[slot_num
];
323 struct audio_format_info
*a
= &afi
[s
->format
];
325 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
327 s
->wng
= setup_default_wng();
329 s
->wng
= wng_new(a
->num_writers
);
331 s
->wng
->buf
= s
->fc
->outbuf
;
332 s
->wng
->loaded
= s
->fc
->out_loaded
;
333 s
->wng
->input_eof
= &s
->fc
->eof
;
334 s
->wng
->channels
= &s
->fc
->channels
;
335 s
->wng
->samplerate
= &s
->fc
->samplerate
;
336 s
->fc
->output_eof
= &s
->wng
->eof
;
337 PARA_INFO_LOG("samplerate: %d\n", *s
->wng
->samplerate
);
339 s
->wng
->buf
= s
->receiver_node
->buf
;
340 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
341 s
->wng
->input_eof
= &s
->receiver_node
->eof
;
343 s
->wng
->task
.event_handler
= wng_event_handler
;
344 for (i
= 0; i
< a
->num_writers
; i
++) {
345 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
346 s
->wng
->writer_nodes
[i
].writer
= a
->writers
[i
];
348 ret
= wng_open(s
->wng
);
350 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
354 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fc
->filters
);
357 static void rn_event_handler(struct task
*t
)
359 struct receiver_node
*rn
= t
->private_data
;
360 const struct timeval restart_delay
= {0, 10 * 1000};
363 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
366 /* set restart barrier */
368 if (slot
[i
].receiver_node
!= rn
)
370 tv_add(now
, &restart_delay
, &afi
[slot
[i
].format
].restart_barrier
);
374 static int open_receiver(int format
)
376 struct audio_format_info
*a
= &afi
[format
];
379 struct receiver_node
*rn
;
380 const struct timeval restart_delay
= {1, 0};
382 ret
= get_empty_slot();
388 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
389 rn
= s
->receiver_node
;
390 rn
->receiver
= a
->receiver
;
391 rn
->conf
= a
->receiver_conf
;
392 ret
= a
->receiver
->open(s
->receiver_node
);
394 free(s
->receiver_node
);
395 s
->receiver_node
= NULL
;
398 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
399 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
400 rn
->task
.private_data
= s
->receiver_node
;
401 rn
->task
.pre_select
= a
->receiver
->pre_select
;
402 rn
->task
.post_select
= a
->receiver
->post_select
;
403 rn
->task
.event_handler
= rn_event_handler
;
404 sprintf(rn
->task
.status
, "%s receiver node", rn
->receiver
->name
);
405 register_task(&rn
->task
);
408 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
409 tv_add(now
, &restart_delay
, &afi
[format
].restart_barrier
);
413 static int receiver_running(int format
)
418 struct slot_info
*s
= &slot
[i
];
419 if (s
->format
== format
&& s
->receiver_node
420 && !s
->receiver_node
->eof
)
426 static int open_current_receiver(struct sched
*s
)
430 char *audio_format
= stat_task
->stat_item_values
[SI_FORMAT
];
432 if (!audio_format
|| !stat_task
->pcd
)
434 i
= get_audio_format_num(audio_format
+ strlen(
435 status_item_list
[SI_FORMAT
]) + 1);
438 if (receiver_running(i
))
440 if (tv_diff(now
, &afi
[i
].restart_barrier
, &diff
) < 0) {
444 return open_receiver(i
) < 0? 0 : 1;
447 static unsigned compute_time_diff(const struct timeval
*status_time
)
449 struct timeval tmp
, diff
;
450 static unsigned count
;
451 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
452 const struct timeval max_deviation
= {0, 500 * 1000};
453 const int time_smooth
= 5;
457 sign
= tv_diff(status_time
, now
, &diff
);
458 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
459 // sign, sa_time_diff_sign);
461 sa_time_diff_sign
= sign
;
462 stat_task
->sa_time_diff
= diff
;
467 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
468 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
469 PARA_WARNING_LOG("time diff jump: %lims\n",
473 sa_time_diff_sign
= tv_convex_combination(
474 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
475 count
> 10? sign
: sign
* time_smooth
, &diff
,
477 stat_task
->sa_time_diff
= tmp
;
478 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
481 sa_time_diff_sign
? "+" : "-",
482 tv2ms(&stat_task
->sa_time_diff
)
485 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
489 static int check_stat_line(char *line
, __a_unused
void *data
)
493 long unsigned sec
, usec
;
496 // PARA_INFO_LOG("line: %s\n", line);
499 itemnum
= stat_line_valid(line
);
501 PARA_WARNING_LOG("invalid status line: %s\n", line
);
504 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
506 tmp
= make_message("%s\n", line
);
507 stat_client_write(tmp
, itemnum
);
509 free(stat_task
->stat_item_values
[itemnum
]);
510 stat_task
->stat_item_values
[itemnum
] = para_strdup(line
);
511 ilen
= strlen(status_item_list
[itemnum
]);
514 stat_task
->playing
= strstr(line
, "playing")? 1 : 0;
517 stat_task
->offset_seconds
= atoi(line
+ ilen
+ 1);
520 stat_task
->length_seconds
= atoi(line
+ ilen
+ 1);
522 case SI_STREAM_START
:
523 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
524 struct timeval a_start
, delay
;
525 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
526 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
527 stat_task
->server_stream_start
.tv_sec
= sec
;
528 stat_task
->server_stream_start
.tv_usec
= usec
;
529 if (compute_time_diff(NULL
) > 2) {
530 if (stat_task
->sa_time_diff_sign
< 0)
531 tv_add(&stat_task
->server_stream_start
,
532 &stat_task
->sa_time_diff
, &a_start
);
534 tv_diff(&stat_task
->server_stream_start
,
535 &stat_task
->sa_time_diff
, &a_start
);
536 tv_add(&a_start
, &delay
, &initial_delay_barrier
);
540 case SI_CURRENT_TIME
:
541 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
542 struct timeval tv
= {sec
, usec
};
543 compute_time_diff(&tv
);
545 if (stat_task
->clock_diff_count
)
546 stat_task
->clock_diff_count
--;
552 static void try_to_close_slot(int slot_num
)
554 struct slot_info
*s
= &slot
[slot_num
];
558 if (s
->receiver_node
&& !s
->receiver_node
->eof
)
560 if (s
->fc
&& !s
->fc
->eof
)
562 if (s
->wng
&& !s
->wng
->eof
)
564 PARA_INFO_LOG("closing slot %d \n", slot_num
);
566 close_filters(s
->fc
);
568 close_receiver(slot_num
);
569 clear_slot(slot_num
);
573 * Check if any receivers/filters/writers need to be started and do so if
574 * necessary. Since the pre_select function didn't have a chance yet to put
575 * file descriptors into the fd sets given by s, make the upcoming select()
576 * return immediately to avoid a long timeout in case we started something.
578 static void audiod_pre_select(struct sched
*s
, __a_unused
struct task
*t
)
581 struct timeval min_delay
= {0, 1};
584 if (audiod_status
!= AUDIOD_ON
|| !stat_task
->playing
)
585 return kill_all_decoders();
586 if (open_current_receiver(s
))
587 s
->timeout
= min_delay
;
589 struct slot_info
*sl
= &slot
[i
];
590 struct audio_format_info
*a
;
595 a
= &afi
[sl
->format
];
596 if (!sl
->receiver_node
)
598 if (!a
->num_filters
) {
599 if (sl
->receiver_node
->loaded
&& !sl
->wng
) {
601 s
->timeout
= min_delay
;
605 if (sl
->receiver_node
->loaded
&& !sl
->fc
) {
607 s
->timeout
= min_delay
;
610 if (!sl
->fc
|| !*sl
->fc
->out_loaded
|| sl
->wng
)
612 if (tv_diff(now
, &initial_delay_barrier
, &diff
) > 0) {
614 s
->timeout
= min_delay
;
617 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff
));
618 if (tv_diff(&s
->timeout
, &diff
, NULL
) > 0) {
624 static void audiod_post_select(__a_unused
struct sched
*s
,
625 __a_unused
struct task
*t
)
631 try_to_close_slot(i
);
634 static void init_audiod_task(struct task
*t
)
636 t
->pre_select
= audiod_pre_select
;
637 t
->post_select
= audiod_post_select
;
638 t
->event_handler
= NULL
;
640 sprintf(t
->status
, "audiod task");
643 static int parse_stream_command(const char *txt
, char **cmd
)
645 char *p
= strchr(txt
, ':');
649 return -E_MISSING_COLON
;
651 FOR_EACH_AUDIO_FORMAT(i
) {
652 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
657 return -E_UNSUPPORTED_AUDIO_FORMAT
;
660 static int add_filter(int format
, char *cmdline
)
662 struct audio_format_info
*a
= &afi
[format
];
663 int filter_num
, nf
= a
->num_filters
;
665 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
668 a
->filters
[nf
] = &filters
[filter_num
];
670 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
671 a
->filters
[nf
]->name
);
675 static int init_writers(void)
679 struct audio_format_info
*a
;
681 init_supported_writers();
682 nw
= PARA_MAX(1, conf
.writer_given
);
683 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
684 FOR_EACH_AUDIO_FORMAT(i
) {
686 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
687 a
->writers
= para_malloc(nw
* sizeof(struct writer
*));
690 for (i
= 0; i
< conf
.writer_given
; i
++) {
693 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
698 wconf
= check_writer_arg(cmd
, &writer_num
);
703 a
->writers
[nw
] = &writers
[writer_num
];
704 a
->writer_conf
[nw
] = wconf
;
705 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
706 nw
, writer_names
[writer_num
]);
714 static int init_receivers(void)
716 int i
, ret
, receiver_num
;
718 struct audio_format_info
*a
;
720 for (i
= 0; receivers
[i
].name
; i
++) {
721 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
722 receivers
[i
].init(&receivers
[i
]);
724 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
725 char *arg
= conf
.receiver_arg
[i
];
726 char *recv_arg
= strchr(arg
, ':');
727 ret
= -E_MISSING_COLON
;
732 ret
= get_audio_format_num(arg
);
735 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
736 if (!afi
[ret
].receiver_conf
) {
737 ret
= -E_RECV_SYNTAX
;
740 afi
[ret
].receiver
= &receivers
[receiver_num
];
742 /* use the first available receiver with no arguments
743 * for those audio formats for which no receiver
746 cmd
= para_strdup(receivers
[0].name
);
747 FOR_EACH_AUDIO_FORMAT(i
) {
749 if (a
->receiver_conf
)
751 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
752 if (!a
->receiver_conf
)
753 return -E_RECV_SYNTAX
;
754 a
->receiver
= &receivers
[receiver_num
];
762 static int init_default_filters(void)
766 FOR_EACH_AUDIO_FORMAT(i
) {
767 struct audio_format_info
*a
= &afi
[i
];
772 continue; /* no default -- nothing to to */
773 /* add "dec" to audio format name */
774 tmp
= make_message("%sdec", audio_formats
[i
]);
775 for (j
= 0; filters
[j
].name
; j
++)
776 if (!strcmp(tmp
, filters
[j
].name
))
779 ret
= -E_UNSUPPORTED_FILTER
;
780 if (!filters
[j
].name
)
782 tmp
= para_strdup(filters
[j
].name
);
783 ret
= add_filter(i
, tmp
);
787 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
794 static int init_filters(void)
798 filter_init(filters
);
799 nf
= PARA_MAX(1, conf
.filter_given
);
800 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
801 FOR_EACH_AUDIO_FORMAT(i
) {
802 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
803 afi
[i
].filters
= para_malloc(nf
* sizeof(struct filter
*));
805 if (!conf
.no_default_filters_given
)
806 return init_default_filters();
807 for (i
= 0; i
< conf
.filter_given
; i
++) {
808 char *arg
= conf
.filter_arg
[i
];
809 char *filter_name
= strchr(arg
, ':');
810 ret
= -E_MISSING_COLON
;
815 ret
= get_audio_format_num(arg
);
818 ret
= add_filter(ret
, filter_name
);
822 ret
= init_default_filters(); /* use default values for the rest */
827 static int init_stream_io(void)
831 ret
= init_writers();
834 ret
= init_receivers();
837 ret
= init_filters();
843 static int audiod_get_socket(void)
845 struct sockaddr_un unix_addr
;
848 if (conf
.socket_given
)
849 socket_name
= para_strdup(conf
.socket_arg
);
851 char *hn
= para_hostname();
852 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
856 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
857 if (conf
.force_given
)
859 fd
= create_local_socket(socket_name
, &unix_addr
,
860 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
862 PARA_EMERG_LOG("can not connect to socket\n");
863 exit(EXIT_FAILURE
); /* do not unlink socket */
865 if (listen(fd
, 5) < 0) {
866 PARA_EMERG_LOG("can not listen on socket\n");
867 exit(EXIT_FAILURE
); /* do not unlink socket */
869 mark_fd_nonblock(fd
);
873 static void signal_event_handler(struct task
*t
)
875 struct signal_task
*st
= t
->private_data
;
877 switch (st
->signum
) {
881 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
882 clean_exit(EXIT_FAILURE
, "caught deadly signal");
886 static void signal_pre_select(struct sched
*s
, struct task
*t
)
888 struct signal_task
*st
= t
->private_data
;
890 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
893 static void signal_post_select(struct sched
*s
, struct task
*t
)
895 struct signal_task
*st
= t
->private_data
;
897 if (!FD_ISSET(st
->fd
, &s
->rfds
))
899 t
->ret
= -E_SIGNAL_CAUGHT
;
900 st
->signum
= para_next_signal();
903 static void signal_setup_default(struct signal_task
*st
)
905 st
->task
.pre_select
= signal_pre_select
;
906 st
->task
.post_select
= signal_post_select
;
907 st
->task
.private_data
= st
;
908 sprintf(st
->task
.status
, "signal task");
911 static void command_pre_select(struct sched
*s
, struct task
*t
)
913 struct command_task
*ct
= t
->private_data
;
915 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
919 static void command_post_select(struct sched
*s
, struct task
*t
)
922 struct command_task
*ct
= t
->private_data
;
924 t
->ret
= 1; /* always successful */
925 audiod_status_dump();
926 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
928 ret
= handle_connect(ct
->fd
);
930 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
933 static void init_command_task(struct command_task
*ct
)
935 ct
->task
.pre_select
= command_pre_select
;
936 ct
->task
.post_select
= command_post_select
;
937 ct
->task
.event_handler
= NULL
;
938 ct
->task
.private_data
= ct
;
939 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
940 sprintf(ct
->task
.status
, "command task");
943 static void close_stat_pipe(void)
949 client_close(stat_task
->pcd
);
950 stat_task
->pcd
= NULL
;
951 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
952 free(stat_task
->stat_item_values
[i
]);
953 stat_task
->stat_item_values
[i
] = NULL
;
956 stat_task
->length_seconds
= 0;
957 stat_task
->offset_seconds
= 0;
958 audiod_status_dump();
959 stat_task
->playing
= 0;
960 stat_task
->stat_item_values
[SI_STATUS_BAR
] = make_message(
961 "%s:no connection to para_server\n",
962 status_item_list
[SI_STATUS_BAR
]);
963 stat_client_write(stat_task
->stat_item_values
[SI_STATUS_BAR
],
965 if (stat_task
->clock_diff_count
) {
966 stat_task
->clock_diff_barrier
.tv_sec
= now
->tv_sec
+ 1;
967 stat_task
->clock_diff_barrier
.tv_usec
= now
->tv_usec
;
972 * close the connection to para_server and exit
974 * \param status the exit status which is passed to exit(3)
975 * \param msg the log message
977 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
978 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
983 void __noreturn
clean_exit(int status
, const char *msg
)
985 PARA_EMERG_LOG("%s\n", msg
);
992 /* avoid busy loop if server is down */
993 static void set_stat_task_restart_barrier(void)
995 struct timeval delay
= {5, 0};
996 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
999 static void client_task_event_handler(__a_unused
struct task
*t
)
1003 if (t
->ret
== -E_HANDSHAKE_COMPLETE
)
1007 if (t
->ret
!= -E_SERVER_EOF
)
1008 stat_task
->clock_diff_count
= conf
.clock_diff_count_arg
;
1009 set_stat_task_restart_barrier();
1010 FOR_EACH_AUDIO_FORMAT(i
)
1011 afi
[i
].restart_barrier
= stat_task
->restart_barrier
;
1014 static void status_pre_select(struct sched
*s
, struct task
*t
)
1016 struct status_task
*st
= t
->private_data
;
1019 t
->ret
= 1; /* always successful */
1020 if (st
->pcd
|| audiod_status
== AUDIOD_OFF
)
1022 if (!st
->clock_diff_count
&& tv_diff(now
, &st
->restart_barrier
, NULL
)
1025 if (st
->clock_diff_count
) {
1026 char *argv
[] = {"audiod", "stat", "1", NULL
};
1028 if (tv_diff(now
, &st
->clock_diff_barrier
, NULL
) < 0)
1030 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1031 ret
= client_open(argc
, argv
, &st
->pcd
);
1034 char *argv
[] = {"audiod", "stat", NULL
};
1036 ret
= client_open(argc
, argv
, &st
->pcd
);
1038 set_stat_task_restart_barrier();
1041 st
->pcd
->task
.event_handler
= client_task_event_handler
;
1042 s
->timeout
.tv_sec
= 0;
1043 s
->timeout
.tv_usec
= 1;
1046 static void status_post_select(__a_unused
struct sched
*s
, struct task
*t
)
1048 struct status_task
*st
= t
->private_data
;
1049 unsigned bytes_left
;
1052 if (!st
->pcd
|| st
->pcd
->status
!= CL_RECEIVING
)
1054 if (st
->pcd
&& audiod_status
== AUDIOD_OFF
) {
1055 unregister_task(&st
->pcd
->task
);
1057 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1060 bytes_left
= for_each_line(st
->pcd
->buf
, st
->pcd
->loaded
,
1061 &check_stat_line
, NULL
);
1062 if (st
->pcd
->loaded
!= bytes_left
) {
1063 st
->last_status_read
= *now
;
1064 st
->pcd
->loaded
= bytes_left
;
1066 struct timeval diff
;
1067 tv_diff(now
, &st
->last_status_read
, &diff
);
1068 if (diff
.tv_sec
> 61)
1073 static void init_status_task(struct status_task
*st
)
1075 memset(st
, 0, sizeof(struct status_task
));
1076 st
->task
.pre_select
= status_pre_select
;
1077 st
->task
.post_select
= status_post_select
;
1078 st
->task
.private_data
= st
;
1079 st
->sa_time_diff_sign
= 1;
1080 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1081 sprintf(st
->task
.status
, "status task");
1084 static void set_initial_status(void)
1086 audiod_status
= AUDIOD_ON
;
1087 if (!conf
.mode_given
)
1089 if (!strcmp(conf
.mode_arg
, "sb")) {
1090 audiod_status
= AUDIOD_STANDBY
;
1093 if (!strcmp(conf
.mode_arg
, "off")) {
1094 audiod_status
= AUDIOD_OFF
;
1097 if (strcmp(conf
.mode_arg
, "on"))
1098 PARA_WARNING_LOG("%s", "invalid mode\n");
1102 * the main function of para_audiod
1104 * \param argc usual argument count
1105 * \param argv usual argument vector
1107 * \return EXIT_SUCCESS or EXIT_FAILURE
1109 * \sa para_audiod(1)
1111 int main(int argc
, char *argv
[])
1116 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1117 struct task audiod_task_struct
, *audiod_task
= &audiod_task_struct
;
1120 audiod_cmdline_parser(argc
, argv
, &conf
);
1121 HANDLE_VERSION_FLAG("audiod", conf
);
1122 para_drop_privileges(conf
.user_arg
, conf
.group_arg
);
1123 config_file
= configfile_exists();
1125 struct audiod_cmdline_parser_params params
= {
1128 .check_required
= 0,
1129 .check_ambiguity
= 0
1132 if (audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
)) {
1133 PARA_EMERG_LOG("%s", "parse error in config file\n");
1138 if (conf
.logfile_given
)
1139 logfile
= open_log(conf
.logfile_arg
);
1140 log_welcome("para_audiod", conf
.loglevel_arg
);
1141 i
= init_stream_io();
1143 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i
));
1146 server_uptime(UPTIME_SET
);
1147 set_initial_status();
1151 setup_signal_handling();
1152 signal_setup_default(sig_task
);
1153 sig_task
->task
.event_handler
= signal_event_handler
;
1155 init_status_task(stat_task
);
1156 init_command_task(cmd_task
);
1157 init_audiod_task(audiod_task
);
1159 if (conf
.daemon_given
)
1162 register_task(&sig_task
->task
);
1163 register_task(&cmd_task
->task
);
1164 register_task(&stat_task
->task
);
1165 register_task(audiod_task
);
1166 s
.default_timeout
.tv_sec
= 0;
1167 s
.default_timeout
.tv_usec
= 99 * 1000;
1170 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
1171 return EXIT_FAILURE
;