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
)
200 * Valid status items and playing, set length and tmp to the stream
201 * start. We use the slot info and fall back to the info from current
202 * status items if no slot info is available.
204 length
= stat_task
->length_seconds
;
205 tmp
= &stat_task
->server_stream_start
;
206 if (s
&& s
->wns
) { /* writer active in this slot */
207 btr_get_node_start(s
->wns
[0].btrn
, &wstime
);
208 if (wstime
.tv_sec
!= 0) { /* writer wrote something */
209 if (s
->server_stream_start
.tv_sec
== 0) {
210 /* copy status info to slot */
211 s
->server_stream_start
= stat_task
->server_stream_start
;
212 s
->offset_seconds
= stat_task
->offset_seconds
;
213 s
->seconds_total
= stat_task
->length_seconds
;
215 length
= s
->seconds_total
;
216 tmp
= &s
->server_stream_start
;
219 if (stat_task
->sa_time_diff_sign
> 0)
220 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
222 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
225 tv_diff(now
, &sss
, &diff
);
226 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
229 tv_diff(now
, &wstime
, &wtime
);
230 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
231 seconds
= s
->offset_seconds
;
232 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
233 ret
= tv_diff(&rstime
, &sss
, &rskip
);
234 if (ret
> 0) { /* audiod was started in the middle of the stream */
235 tv_add(&wtime
, &rskip
, &sum
);
236 seconds
+= sum
.tv_sec
;
238 seconds
+= wtime
.tv_sec
;
240 seconds
= PARA_MIN(seconds
, length
);
241 seconds
= PARA_MAX(seconds
, 0);
243 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
247 (length
- seconds
) / 60,
248 (length
- seconds
) % 60,
249 length
? (seconds
* 100 + length
/ 2) / length
: 0,
253 PARA_DEBUG_LOG("slot %d: %s\n", slot_num
, msg
);
256 return para_strdup(NULL
);
259 static int want_colors(void)
261 if (conf
.color_arg
== color_arg_no
)
263 if (conf
.color_arg
== color_arg_yes
)
265 if (conf
.logfile_given
)
267 return isatty(STDERR_FILENO
);
270 static void parse_config_or_die(void)
274 struct audiod_cmdline_parser_params params
= {
278 .check_ambiguity
= 0,
282 if (conf
.config_file_given
)
283 config_file
= para_strdup(conf
.config_file_arg
);
285 char *home
= para_homedir();
286 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
289 ret
= file_exists(config_file
);
290 if (conf
.config_file_given
&& !ret
) {
291 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
295 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
297 daemon_set_loglevel(conf
.loglevel_arg
);
304 static void setup_signal_handling(void)
306 sig_task
->fd
= para_signal_init();
307 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
308 para_install_sighandler(SIGINT
);
309 para_install_sighandler(SIGTERM
);
310 para_install_sighandler(SIGHUP
);
311 para_sigaction(SIGPIPE
, SIG_IGN
);
314 static void clear_slot(int slot_num
)
316 struct slot_info
*s
= &slot
[slot_num
];
318 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
319 memset(s
, 0, sizeof(struct slot_info
));
323 static void close_receiver(int slot_num
)
325 struct slot_info
*s
= &slot
[slot_num
];
326 struct audio_format_info
*a
;
327 struct timeval restart_delay
= {0, 200 * 1000};
329 if (s
->format
< 0 || !s
->receiver_node
)
332 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
333 audio_formats
[s
->format
], slot_num
);
334 a
->receiver
->close(s
->receiver_node
);
335 btr_free_node(s
->receiver_node
->btrn
);
336 free(s
->receiver_node
);
337 s
->receiver_node
= NULL
;
338 tv_add(now
, &restart_delay
, &afi
[s
->format
].restart_barrier
);
341 static void writer_cleanup(struct writer_node
*wn
)
347 w
= writers
+ wn
->writer_num
;
348 PARA_INFO_LOG("closing %s\n", writer_names
[wn
->writer_num
]);
350 btr_free_node(wn
->btrn
);
353 static void close_writers(struct slot_info
*s
)
355 struct audio_format_info
*a
;
361 if (a
->num_writers
== 0)
362 writer_cleanup(s
->wns
);
364 for (i
= 0; i
< a
->num_writers
; i
++)
365 writer_cleanup(s
->wns
+ i
);
371 static void close_filters(struct slot_info
*s
)
374 struct audio_format_info
*a
= afi
+ s
->format
;
375 if (a
->num_filters
== 0)
377 for (i
= 0; i
< a
->num_filters
; i
++) {
378 struct filter_node
*fn
= s
->fns
+ i
;
383 f
= filters
+ fn
->filter_num
;
386 btr_free_node(fn
->btrn
);
393 * Whenever a task commits suicide by returning from post_select with t->error
394 * < 0, it also removes its btr node. We do exactly that to kill a running
395 * task. Note that the scheduler checks t->error also _before_ each pre/post
396 * select call, so the victim will never be scheduled again.
398 static void kill_btrn(struct btr_node
*btrn
, struct task
*t
, int error
)
403 btr_remove_node(btrn
);
406 static void kill_all_decoders(int error
)
411 struct slot_info
*s
= &slot
[i
];
412 struct audio_format_info
*a
;
417 for (j
= 0; j
< a
->num_writers
; j
++)
418 kill_btrn(s
->wns
[j
].btrn
, &s
->wns
[j
].task
, error
);
420 for (j
= 0; j
< a
->num_writers
; j
++)
421 kill_btrn(s
->fns
[j
].btrn
, &s
->wns
[j
].task
, error
);
422 if (s
->receiver_node
)
423 kill_btrn(s
->receiver_node
->btrn
, &s
->receiver_node
->task
,
428 static int get_empty_slot(void)
439 if (s
->wns
|| s
->receiver_node
|| s
->fns
)
444 return -E_NO_MORE_SLOTS
;
448 * get the number of filters
450 * \param audio_format_num the number identifying the audio format
452 * \return the number of filters for the given audio format
456 int num_filters(int audio_format_num
)
458 return afi
[audio_format_num
].num_filters
;
461 static void open_filters(struct slot_info
*s
)
463 struct audio_format_info
*a
= afi
+ s
->format
;
464 struct filter_node
*fn
;
465 int nf
= a
->num_filters
;
466 struct btr_node
*parent
;
471 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
472 assert(s
->fns
== NULL
);
473 s
->fns
= para_calloc(nf
* sizeof(struct filter_node
));
474 parent
= s
->receiver_node
->btrn
;
475 for (i
= 0; i
< nf
; i
++) {
476 struct filter
*f
= filters
+ a
->filter_nums
[i
];
478 fn
->filter_num
= a
->filter_nums
[i
];
479 fn
->conf
= a
->filter_conf
[i
];
480 fn
->task
.pre_select
= f
->pre_select
;
481 fn
->task
.post_select
= f
->post_select
;
483 fn
->btrn
= btr_new_node(&(struct btr_node_description
)
484 EMBRACE(.name
= f
->name
, .parent
= parent
,
485 .handler
= f
->execute
, .context
= fn
));
488 register_task(&fn
->task
);
490 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
491 audio_formats
[s
->format
], i
, nf
, f
->name
, s
- slot
);
492 sprintf(fn
->task
.status
, "%s (slot %d)", f
->name
, s
- slot
);
496 static void open_writers(struct slot_info
*s
)
499 struct audio_format_info
*a
= afi
+ s
->format
;
500 struct writer_node
*wn
;
501 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
503 assert(s
->wns
== NULL
);
504 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
505 * sizeof(struct writer_node
));
506 if (a
->num_writers
== 0)
507 setup_writer_node(NULL
, parent
, s
->wns
);
509 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
510 for (i
= 0; i
< a
->num_writers
; i
++) {
512 wn
->conf
= a
->writer_conf
[i
];
513 wn
->writer_num
= a
->writer_nums
[i
];
514 register_writer_node(wn
, parent
);
519 /* returns slot num on success */
520 static int open_receiver(int format
)
522 struct audio_format_info
*a
= &afi
[format
];
525 struct receiver
*r
= a
->receiver
;
526 struct receiver_node
*rn
;
527 const struct timeval restart_delay
= {2, 0};
529 ret
= get_empty_slot();
535 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
536 rn
= s
->receiver_node
;
538 rn
->conf
= a
->receiver_conf
;
539 rn
->btrn
= btr_new_node(&(struct btr_node_description
)
540 EMBRACE(.name
= r
->name
, .context
= rn
));
543 btr_free_node(rn
->btrn
);
545 s
->receiver_node
= NULL
;
548 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
549 audio_formats
[s
->format
], r
->name
, slot_num
);
550 rn
->task
.pre_select
= r
->pre_select
;
551 rn
->task
.post_select
= r
->post_select
;
552 sprintf(rn
->task
.status
, "%s receiver node", r
->name
);
553 register_task(&rn
->task
);
557 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
558 tv_add(now
, &restart_delay
, &afi
[format
].restart_barrier
);
562 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
563 static int receiver_running(int format
)
568 struct slot_info
*s
= &slot
[i
];
569 if (s
->format
!= format
)
571 if (!s
->receiver_node
)
573 if (s
->receiver_node
->task
.error
>= 0)
580 struct btr_node
*audiod_get_btr_root(void)
582 int i
, newest_slot
= -1;
583 struct timeval newest_rstime
= {0, 0};
586 struct slot_info
*s
= &slot
[i
];
587 struct timeval rstime
;
588 if (!s
->receiver_node
)
590 if (s
->receiver_node
->task
.error
< 0)
592 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
593 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
595 newest_rstime
= rstime
;
598 if (newest_slot
== -1)
600 return slot
[newest_slot
].receiver_node
->btrn
;
603 /* returns slot num on success. */
604 static int open_current_receiver(struct sched
*s
)
607 int ret
, cafn
= stat_task
->current_audio_format_num
;
609 if (cafn
< 0 || !stat_task
->ct
)
611 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
612 if (stat_task
->vss_status
!= VSS_STATUS_FLAG_PLAYING
)
614 ret
= receiver_running(cafn
);
615 if (ret
> 0) /* already running and not eof */
617 if (ret
< 0) { /* eof */
619 * para_server uses a zero start time during the announcement
620 * period, i.e. before it sends the first chunk. Wait until
621 * this period begins to avoid restarting the receiver that
622 * belongs to the file just completed.
624 if (stat_task
->server_stream_start
.tv_sec
!= 0) {
625 sched_request_timeout_ms(100, s
);
629 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, &diff
) < 0) {
630 if (tv_diff(&s
->timeout
, &diff
, NULL
) > 0)
631 sched_request_timeout(&diff
, s
);
636 /* start a new receiver */
637 return open_receiver(cafn
);
640 static unsigned compute_time_diff(const struct timeval
*status_time
)
642 struct timeval tmp
, diff
;
643 static unsigned count
;
644 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
645 const struct timeval max_deviation
= {0, 500 * 1000};
646 const int time_smooth
= 5;
650 sign
= tv_diff(status_time
, now
, &diff
);
651 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
652 // sign, sa_time_diff_sign);
654 sa_time_diff_sign
= sign
;
655 stat_task
->sa_time_diff
= diff
;
660 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
661 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
662 PARA_WARNING_LOG("time diff jump: %lims\n",
666 sa_time_diff_sign
= tv_convex_combination(
667 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
668 count
> 10? sign
: sign
* time_smooth
, &diff
,
670 stat_task
->sa_time_diff
= tmp
;
671 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
674 sa_time_diff_sign
? "+" : "-",
675 tv2ms(&stat_task
->sa_time_diff
)
678 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
682 static int update_item(int itemnum
, char *buf
)
684 long unsigned sec
, usec
;
686 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
688 free(stat_item_values
[itemnum
]);
689 stat_item_values
[itemnum
] = para_strdup(buf
);
690 stat_client_write_item(itemnum
);
692 case SI_STATUS_FLAGS
:
693 stat_task
->vss_status
= 0;
694 if (strchr(buf
, 'N'))
695 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
696 if (strchr(buf
, 'P'))
697 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
700 stat_task
->offset_seconds
= atoi(buf
);
702 case SI_SECONDS_TOTAL
:
703 stat_task
->length_seconds
= atoi(buf
);
705 case SI_STREAM_START
:
706 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
707 struct timeval a_start
, delay
;
708 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
709 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
710 stat_task
->server_stream_start
.tv_sec
= sec
;
711 stat_task
->server_stream_start
.tv_usec
= usec
;
712 if (compute_time_diff(NULL
) > 2) {
713 if (stat_task
->sa_time_diff_sign
< 0)
714 tv_add(&stat_task
->server_stream_start
,
715 &stat_task
->sa_time_diff
, &a_start
);
717 tv_diff(&stat_task
->server_stream_start
,
718 &stat_task
->sa_time_diff
, &a_start
);
719 tv_add(&a_start
, &delay
, &initial_delay_barrier
);
723 case SI_CURRENT_TIME
:
724 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
725 struct timeval tv
= {sec
, usec
};
726 compute_time_diff(&tv
);
730 stat_task
->current_audio_format_num
731 = get_audio_format_num(buf
);
736 static int parse_stream_command(const char *txt
, char **cmd
)
738 char *p
= strchr(txt
, ':');
742 return -E_MISSING_COLON
;
744 FOR_EACH_AUDIO_FORMAT(i
) {
745 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
750 return -E_UNSUPPORTED_AUDIO_FORMAT
;
753 static int add_filter(int format
, char *cmdline
)
755 struct audio_format_info
*a
= &afi
[format
];
756 int filter_num
, nf
= a
->num_filters
;
758 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
761 a
->filter_nums
[nf
] = filter_num
;
763 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
764 filters
[filter_num
].name
);
768 static int parse_writer_args(void)
772 struct audio_format_info
*a
;
774 nw
= PARA_MAX(1U, conf
.writer_given
);
775 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
776 FOR_EACH_AUDIO_FORMAT(i
) {
778 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
779 a
->writer_nums
= para_malloc(nw
* sizeof(int));
782 for (i
= 0; i
< conf
.writer_given
; i
++) {
785 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
790 wconf
= check_writer_arg(cmd
, &writer_num
);
795 a
->writer_nums
[nw
] = writer_num
;
796 a
->writer_conf
[nw
] = wconf
;
797 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
798 nw
, writer_names
[writer_num
]);
806 static int parse_receiver_args(void)
808 int i
, ret
, receiver_num
;
810 struct audio_format_info
*a
;
812 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
813 char *arg
= conf
.receiver_arg
[i
];
814 char *recv_arg
= strchr(arg
, ':');
815 ret
= -E_MISSING_COLON
;
820 ret
= get_audio_format_num(arg
);
823 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
824 if (!afi
[ret
].receiver_conf
) {
825 ret
= -E_RECV_SYNTAX
;
828 afi
[ret
].receiver
= &receivers
[receiver_num
];
830 /* use the first available receiver with no arguments
831 * for those audio formats for which no receiver
834 cmd
= para_strdup(receivers
[0].name
);
835 FOR_EACH_AUDIO_FORMAT(i
) {
837 if (a
->receiver_conf
)
839 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
840 if (!a
->receiver_conf
)
841 return -E_RECV_SYNTAX
;
842 a
->receiver
= &receivers
[receiver_num
];
850 static int init_default_filters(void)
854 FOR_EACH_AUDIO_FORMAT(i
) {
855 struct audio_format_info
*a
= &afi
[i
];
860 continue; /* no default -- nothing to to */
861 /* add "dec" to audio format name */
862 tmp
= make_message("%sdec", audio_formats
[i
]);
863 for (j
= 0; filters
[j
].name
; j
++)
864 if (!strcmp(tmp
, filters
[j
].name
))
867 ret
= -E_UNSUPPORTED_FILTER
;
868 if (!filters
[j
].name
)
870 tmp
= para_strdup(filters
[j
].name
);
871 ret
= add_filter(i
, tmp
);
875 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
882 static int parse_filter_args(void)
886 nf
= PARA_MAX(1U, conf
.filter_given
);
887 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
888 FOR_EACH_AUDIO_FORMAT(i
) {
889 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
890 afi
[i
].filter_nums
= para_malloc(nf
* sizeof(unsigned));
892 if (!conf
.no_default_filters_given
)
893 return init_default_filters();
894 for (i
= 0; i
< conf
.filter_given
; i
++) {
895 char *arg
= conf
.filter_arg
[i
];
896 char *filter_name
= strchr(arg
, ':');
897 ret
= -E_MISSING_COLON
;
902 ret
= get_audio_format_num(arg
);
905 ret
= add_filter(ret
, filter_name
);
909 ret
= init_default_filters(); /* use default values for the rest */
914 static int parse_stream_args(void)
918 ret
= parse_receiver_args();
921 ret
= parse_filter_args();
924 ret
= parse_writer_args();
930 /* does not unlink socket on errors */
931 static int audiod_get_socket(void)
933 struct sockaddr_un unix_addr
;
936 if (conf
.socket_given
)
937 socket_name
= para_strdup(conf
.socket_arg
);
939 char *hn
= para_hostname();
940 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
944 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
945 if (conf
.force_given
)
947 ret
= create_local_socket(socket_name
, &unix_addr
,
948 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
952 if (listen(fd
, 5) < 0) {
953 ret
= -ERRNO_TO_PARA_ERROR(errno
);
956 ret
= mark_fd_nonblocking(fd
);
961 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
965 static void signal_pre_select(struct sched
*s
, struct task
*t
)
967 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
968 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
971 static void signal_post_select(struct sched
*s
, struct task
*t
)
973 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
975 if (!FD_ISSET(st
->fd
, &s
->rfds
))
978 st
->signum
= para_next_signal();
979 switch (st
->signum
) {
983 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
984 clean_exit(EXIT_FAILURE
, "caught deadly signal");
988 static void signal_setup_default(struct signal_task
*st
)
990 st
->task
.pre_select
= signal_pre_select
;
991 st
->task
.post_select
= signal_post_select
;
992 sprintf(st
->task
.status
, "signal task");
995 static void command_pre_select(struct sched
*s
, struct task
*t
)
997 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
998 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1001 static void command_post_select(struct sched
*s
, struct task
*t
)
1004 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1005 static struct timeval last_status_dump
;
1006 struct timeval tmp
, delay
= {0, 500 * 1000};
1008 tv_add(&last_status_dump
, &delay
, &tmp
);
1009 if (tv_diff(&tmp
, now
, NULL
) < 0) {
1010 audiod_status_dump();
1011 last_status_dump
= *now
;
1014 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
1016 ret
= handle_connect(ct
->fd
);
1018 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1021 static void init_command_task(struct command_task
*ct
)
1023 ct
->task
.pre_select
= command_pre_select
;
1024 ct
->task
.post_select
= command_post_select
;
1026 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1027 sprintf(ct
->task
.status
, "command task");
1030 static void close_stat_pipe(void)
1034 client_close(stat_task
->ct
);
1035 stat_task
->ct
= NULL
;
1036 clear_and_dump_items();
1037 stat_task
->length_seconds
= 0;
1038 stat_task
->offset_seconds
= 0;
1039 stat_task
->vss_status
= 0;
1040 stat_task
->current_audio_format_num
= -1;
1041 audiod_status_dump();
1045 * close the connection to para_server and exit
1047 * \param status the exit status which is passed to exit(3)
1048 * \param msg the log message
1050 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1051 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1056 void __noreturn
clean_exit(int status
, const char *msg
)
1058 PARA_EMERG_LOG("%s\n", msg
);
1060 unlink(socket_name
);
1065 /* avoid busy loop if server is down */
1066 static void set_stat_task_restart_barrier(unsigned seconds
)
1068 struct timeval delay
= {seconds
, 0};
1069 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1072 static bool try_to_close_slot(int slot_num
)
1074 struct slot_info
*s
= &slot
[slot_num
];
1075 struct audio_format_info
*a
= afi
+ s
->format
;
1080 if (s
->receiver_node
&& s
->receiver_node
->task
.error
!= -E_TASK_UNREGISTERED
)
1082 for (i
= 0; i
< a
->num_filters
; i
++)
1083 if (s
->fns
&& s
->fns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1085 if (a
->num_writers
> 0) {
1086 for (i
= 0; i
< a
->num_writers
; i
++)
1087 if (s
->wns
&& s
->wns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1090 if (s
->wns
&& s
->wns
[0].task
.error
!= -E_TASK_UNREGISTERED
)
1093 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1096 close_receiver(slot_num
);
1097 clear_slot(slot_num
);
1102 * Check if any receivers/filters/writers need to be started and do so if
1105 static void start_stop_decoders(struct sched
*s
)
1108 struct slot_info
*sl
;
1109 struct audio_format_info
*a
;
1112 if (try_to_close_slot(i
))
1114 if (audiod_status
!= AUDIOD_ON
||
1115 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1116 return kill_all_decoders(-E_NOT_PLAYING
);
1117 ret
= open_current_receiver(s
);
1121 a
= afi
+ sl
->format
;
1125 activate_grab_clients();
1126 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1130 /* restart the client task if necessary */
1131 static void status_pre_select(struct sched
*s
, struct task
*t
)
1133 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1135 if (audiod_status
== AUDIOD_OFF
) {
1138 if (st
->ct
->task
.error
>= 0) {
1139 st
->ct
->task
.error
= -E_AUDIOD_OFF
;
1142 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1145 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1150 if (st
->ct
->task
.error
< 0) {
1151 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1156 if (st
->ct
->status
!= CL_RECEIVING
)
1158 ret
= for_each_stat_item(st
->ct
->buf
, st
->ct
->loaded
,
1161 st
->ct
->task
.error
= ret
;
1164 if (st
->ct
->loaded
!= ret
) {
1165 st
->last_status_read
= *now
;
1166 st
->ct
->loaded
= ret
;
1168 struct timeval diff
;
1169 tv_diff(now
, &st
->last_status_read
, &diff
);
1170 if (diff
.tv_sec
> 61)
1171 st
->ct
->task
.error
= -E_STATUS_TIMEOUT
;
1175 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1177 if (st
->clock_diff_count
) { /* get status only one time */
1178 char *argv
[] = {"audiod", "--", "stat", "-p", "-n=1", NULL
};
1180 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1181 st
->clock_diff_count
--;
1182 client_open(argc
, argv
, &st
->ct
, NULL
);
1183 set_stat_task_restart_barrier(2);
1187 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1189 client_open(argc
, argv
, &st
->ct
, NULL
);
1190 set_stat_task_restart_barrier(5);
1193 free(stat_item_values
[SI_BASENAME
]);
1194 stat_item_values
[SI_BASENAME
] = para_strdup(
1195 "no connection to para_server");
1196 stat_client_write_item(SI_BASENAME
);
1197 st
->last_status_read
= *now
;
1199 start_stop_decoders(s
);
1202 static void init_status_task(struct status_task
*st
)
1204 memset(st
, 0, sizeof(struct status_task
));
1205 st
->task
.pre_select
= status_pre_select
;
1206 st
->sa_time_diff_sign
= 1;
1207 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1208 st
->current_audio_format_num
= -1;
1209 sprintf(st
->task
.status
, "status task");
1212 static void set_initial_status(void)
1214 audiod_status
= AUDIOD_ON
;
1215 if (!conf
.mode_given
)
1217 if (!strcmp(conf
.mode_arg
, "sb")) {
1218 audiod_status
= AUDIOD_STANDBY
;
1221 if (!strcmp(conf
.mode_arg
, "off")) {
1222 audiod_status
= AUDIOD_OFF
;
1225 if (strcmp(conf
.mode_arg
, "on"))
1226 PARA_WARNING_LOG("invalid mode\n");
1229 __noreturn
static void print_help_and_die(void)
1231 int d
= conf
.detailed_help_given
;
1232 const char **p
= d
? audiod_args_info_detailed_help
1233 : audiod_args_info_help
;
1235 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1236 AUDIOD_CMDLINE_PARSER_VERSION
);
1237 printf_or_die("%s\n\n", audiod_args_info_usage
);
1239 printf_or_die("%s\n", *p
);
1240 print_receiver_helps(d
);
1241 print_filter_helps(d
);
1242 print_writer_helps(d
);
1246 static void init_colors_or_die(void)
1252 daemon_set_default_log_colors();
1253 daemon_set_flag(DF_COLOR_LOG
);
1254 for (i
= 0; i
< conf
.log_color_given
; i
++) {
1255 ret
= daemon_set_log_color(conf
.log_color_arg
[i
]);
1262 * the main function of para_audiod
1264 * \param argc usual argument count
1265 * \param argv usual argument vector
1267 * \return EXIT_SUCCESS or EXIT_FAILURE
1269 * \sa para_audiod(1)
1271 int main(int argc
, char *argv
[])
1274 static struct sched s
;
1275 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1276 struct audiod_cmdline_parser_params params
= {
1279 .check_required
= 0,
1280 .check_ambiguity
= 0,
1285 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1287 HANDLE_VERSION_FLAG("audiod", conf
);
1288 /* init receivers/filters/writers early to make help work */
1292 if (conf
.help_given
|| conf
.detailed_help_given
)
1293 print_help_and_die();
1294 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1295 parse_config_or_die();
1296 init_colors_or_die();
1297 init_random_seed_or_die();
1298 daemon_set_flag(DF_LOG_TIME
);
1299 daemon_set_flag(DF_LOG_HOSTNAME
);
1300 daemon_set_flag(DF_LOG_LL
);
1301 if (conf
.log_timing_given
)
1302 daemon_set_flag(DF_LOG_TIMING
);
1303 if (conf
.logfile_given
) {
1304 daemon_set_logfile(conf
.logfile_arg
);
1305 daemon_open_log_or_die();
1307 ret
= parse_stream_args();
1309 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1312 log_welcome("para_audiod");
1313 server_uptime(UPTIME_SET
);
1314 set_initial_status();
1317 setup_signal_handling();
1318 signal_setup_default(sig_task
);
1320 init_status_task(stat_task
);
1321 init_command_task(cmd_task
);
1323 if (conf
.daemon_given
)
1326 register_task(&sig_task
->task
);
1327 register_task(&cmd_task
->task
);
1328 register_task(&stat_task
->task
);
1329 s
.default_timeout
.tv_sec
= 2;
1330 s
.default_timeout
.tv_usec
= 999 * 1000;
1333 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1334 return EXIT_FAILURE
;