2 * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file audiod.c the paraslash's audio daemon */
12 #include <openssl/rc4.h>
18 #include "audiod.cmdline.h"
23 #include "buffer_tree.h"
25 #include "grab_client.h"
26 #include "client.cmdline.h"
34 #include "write_common.h"
37 /** define the array of error lists needed by para_audiod */
39 /** define the array containing all supported audio formats */
40 const char *audio_formats
[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL
};
42 /** Defines how audiod handles one supported audio format. */
43 struct audio_format_info
{
44 /** pointer to the receiver for this audio format */
45 struct receiver
*receiver
;
46 /** the receiver configuration */
48 /** the number of filters that should be activated for this audio format */
49 unsigned int num_filters
;
50 /** Array of filter numbers to be activated. */
51 unsigned *filter_nums
;
52 /** Pointer to the array of filter configurations. */
54 /** the number of filters that should be activated for this audio format */
55 unsigned int num_writers
;
56 /** Array of writer numbers to be activated. */
58 /** pointer to the array of writer configurations */
60 /** do not start receiver/filters/writer before this time */
61 struct timeval restart_barrier
;
65 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
66 * be associated with a receiver/filter/writer triple. This array holds all
67 * information on the status of these slots.
69 * \sa struct slot_info
71 struct slot_info slot
[MAX_STREAM_SLOTS
];
73 /** The vss status flags audiod is interested in. */
74 enum vss_status_flags
{
75 /** Whether the 'N' flag is set. */
76 VSS_STATUS_FLAG_NEXT
= 1,
77 /** The 'P' flag is set. */
78 VSS_STATUS_FLAG_PLAYING
= 2,
82 * The task for obtaining para_server's status (para_client stat).
84 * \sa struct task, struct sched.
87 /** The associated task structure of audiod. */
89 /** Client data associated with the stat task. */
90 struct client_task
*ct
;
91 /** Do not restart client command until this time. */
92 struct timeval restart_barrier
;
93 /** Last time we received status data from para_server. */
94 struct timeval last_status_read
;
95 /** The offset value announced by para_server. */
97 /** The length of the current audio file as announced by para_server. */
99 /** The start of the current stream from the view of para_server. */
100 struct timeval server_stream_start
;
101 /** The average time deviation between para_server and para_audiod. */
102 struct timeval sa_time_diff
;
103 /** Whether client time is ahead of server time. */
104 int sa_time_diff_sign
;
105 /** The 'P' and the 'N' flags as announced by para_server. */
106 enum vss_status_flags vss_status
;
107 /** Number of times the clock difference is to be checked. */
108 unsigned clock_diff_count
;
109 /** When to start the next check for clock difference. */
110 struct timeval clock_diff_barrier
;
111 /** Number of the audio format as announced by para_server. */
112 int current_audio_format_num
;
115 /** The array of status items sent by para_server. */
116 char *stat_item_values
[NUM_STAT_ITEMS
] = {NULL
};
119 * the current mode of operation of which can be changed by the on/off/cycle
120 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
122 int audiod_status
= AUDIOD_ON
;
125 * the gengetopt args_info struct that holds information on all command line
128 struct audiod_args_info conf
;
130 static char *socket_name
;
131 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
133 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
135 static struct status_task status_task_struct
;
138 * the task that calls the status command of para_server
140 * \sa struct status_task
142 static struct status_task
*stat_task
= &status_task_struct
;
143 static struct timeval initial_delay_barrier
;
146 * the task for handling audiod commands
148 * \sa struct task, struct sched
150 struct command_task
{
151 /** the local listening socket */
153 /** the associated task structure */
157 /** iterate over all supported audio formats */
158 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
161 * get the audio format number
162 * \param name the name of the audio format
164 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
165 * \a name is not a supported audio format.
167 int get_audio_format_num(const char *name
)
171 while (para_isspace(*name
))
173 FOR_EACH_AUDIO_FORMAT(i
)
174 if (!strcmp(name
, audio_formats
[i
]))
176 return -E_UNSUPPORTED_AUDIO_FORMAT
;
179 char *get_time_string(int slot_num
)
181 int ret
, seconds
= 0, length
;
182 struct timeval
*tmp
, sum
, sss
, /* server stream start */
183 rstime
, /* receiver start time */
184 wstime
, /* writer start time */
185 wtime
, /* now - writer start */
186 rskip
; /* receiver start - sss */
187 struct slot_info
*s
= slot_num
< 0? NULL
: &slot
[slot_num
];
190 if (audiod_status
== AUDIOD_OFF
)
192 if (!(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)) {
193 if (stat_task
->length_seconds
) /* paused */
195 goto empty
; /* stopped */
197 if (audiod_status
== AUDIOD_ON
&& !s
)
199 /* valid status items and playing */
200 if (s
&& s
->wns
) { /* writer active in this slot */
201 length
= s
->seconds_total
;
202 tmp
= &s
->server_stream_start
;
203 } else { /* standby mode, rely on status items */
204 length
= stat_task
->length_seconds
;
205 tmp
= &stat_task
->server_stream_start
;
207 if (stat_task
->sa_time_diff_sign
> 0)
208 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
210 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
213 tv_diff(now
, &sss
, &diff
);
214 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
217 btr_get_node_start(s
->wns
[0].btrn
, &wstime
);
218 tv_diff(now
, &wstime
, &wtime
);
219 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
220 seconds
= s
->offset_seconds
;
221 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
222 ret
= tv_diff(&rstime
, &sss
, &rskip
);
223 if (ret
> 0) { /* audiod was started in the middle of the stream */
224 tv_add(&wtime
, &rskip
, &sum
);
225 seconds
+= sum
.tv_sec
;
227 seconds
+= wtime
.tv_sec
;
229 seconds
= PARA_MIN(seconds
, length
);
230 seconds
= PARA_MAX(seconds
, 0);
232 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
236 (length
- seconds
) / 60,
237 (length
- seconds
) % 60,
238 length
? (seconds
* 100 + length
/ 2) / length
: 0,
242 PARA_DEBUG_LOG("slot %d: %s\n", slot_num
, msg
);
245 return para_strdup(NULL
);
248 static int want_colors(void)
250 if (conf
.color_arg
== color_arg_no
)
252 if (conf
.color_arg
== color_arg_yes
)
254 if (conf
.logfile_given
)
256 return isatty(STDERR_FILENO
);
259 static void parse_config_or_die(void)
263 struct audiod_cmdline_parser_params params
= {
267 .check_ambiguity
= 0,
271 if (conf
.config_file_given
)
272 config_file
= para_strdup(conf
.config_file_arg
);
274 char *home
= para_homedir();
275 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
278 ret
= file_exists(config_file
);
279 if (conf
.config_file_given
&& !ret
) {
280 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
284 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
286 daemon_set_loglevel(conf
.loglevel_arg
);
293 static void setup_signal_handling(void)
295 sig_task
->fd
= para_signal_init();
296 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
297 para_install_sighandler(SIGINT
);
298 para_install_sighandler(SIGTERM
);
299 para_install_sighandler(SIGHUP
);
300 para_sigaction(SIGPIPE
, SIG_IGN
);
303 static void clear_slot(int slot_num
)
305 struct slot_info
*s
= &slot
[slot_num
];
307 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
308 memset(s
, 0, sizeof(struct slot_info
));
312 static void close_receiver(int slot_num
)
314 struct slot_info
*s
= &slot
[slot_num
];
315 struct audio_format_info
*a
;
317 if (s
->format
< 0 || !s
->receiver_node
)
320 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
321 audio_formats
[s
->format
], slot_num
);
322 a
->receiver
->close(s
->receiver_node
);
323 btr_free_node(s
->receiver_node
->btrn
);
324 free(s
->receiver_node
);
325 s
->receiver_node
= NULL
;
326 stat_task
->current_audio_format_num
= -1;
329 static void writer_cleanup(struct writer_node
*wn
)
331 struct writer
*w
= writers
+ wn
->writer_num
;
334 btr_free_node(wn
->btrn
);
337 static void close_writers(struct slot_info
*s
)
339 struct audio_format_info
*a
;
345 if (a
->num_writers
== 0)
346 writer_cleanup(s
->wns
);
348 for (i
= 0; i
< a
->num_writers
; i
++)
349 writer_cleanup(s
->wns
+ i
);
355 static void _close_filters(struct slot_info
*s
)
358 struct audio_format_info
*a
= afi
+ s
->format
;
359 if (a
->num_filters
== 0)
361 for (i
= 0; i
< a
->num_filters
; i
++) {
362 struct filter_node
*fn
= s
->fns
+ i
;
363 struct filter
*f
= filters
+ fn
->filter_num
;
366 btr_free_node(fn
->btrn
);
372 static void kill_all_decoders(int error
)
377 struct slot_info
*s
= &slot
[i
];
378 struct audio_format_info
*a
;
383 for (j
= 0; j
< a
->num_writers
; j
++)
384 s
->wns
[j
].task
.error
= error
;
386 for (j
= 0; j
< a
->num_writers
; j
++)
387 s
->fns
[j
].task
.error
= error
;
388 if (s
->receiver_node
)
389 s
->receiver_node
->task
.error
= error
;
393 static int get_empty_slot(void)
404 if (s
->wns
|| s
->receiver_node
|| s
->fns
)
409 return -E_NO_MORE_SLOTS
;
413 * get the number of filters
415 * \param audio_format_num the number identifying the audio format
417 * \return the number of filters for the given audio format
421 int num_filters(int audio_format_num
)
423 return afi
[audio_format_num
].num_filters
;
426 static void open_filters(struct slot_info
*s
)
428 struct audio_format_info
*a
= afi
+ s
->format
;
429 struct filter_node
*fn
;
430 int nf
= a
->num_filters
;
431 struct btr_node
*parent
;
436 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
437 assert(s
->fns
== NULL
);
438 s
->fns
= para_calloc(nf
* sizeof(struct filter_node
));
439 parent
= s
->receiver_node
->btrn
;
440 for (i
= 0; i
< nf
; i
++) {
441 struct filter
*f
= filters
+ a
->filter_nums
[i
];
443 fn
->filter_num
= a
->filter_nums
[i
];
444 fn
->conf
= a
->filter_conf
[i
];
445 fn
->task
.pre_select
= f
->pre_select
;
446 fn
->task
.post_select
= f
->post_select
;
447 fn
->btrn
= btr_new_node(f
->name
, parent
, f
->execute
, fn
);
449 register_task(&fn
->task
);
451 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
452 audio_formats
[s
->format
], i
, nf
, f
->name
, s
- slot
);
453 sprintf(fn
->task
.status
, "%s (slot %d)", f
->name
, s
- slot
);
457 static void open_writers(struct slot_info
*s
)
460 struct audio_format_info
*a
= afi
+ s
->format
;
461 struct writer_node
*wn
;
462 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
464 assert(s
->wns
== NULL
);
465 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
466 * sizeof(struct writer_node
));
467 if (a
->num_writers
== 0)
468 setup_writer_node(NULL
, parent
, s
->wns
);
470 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
471 for (i
= 0; i
< a
->num_writers
; i
++) {
473 wn
->conf
= a
->writer_conf
[i
];
474 wn
->writer_num
= a
->writer_nums
[i
];
475 register_writer_node(wn
, parent
);
478 s
->server_stream_start
= stat_task
->server_stream_start
.tv_sec
?
479 stat_task
->server_stream_start
: *now
;
480 s
->offset_seconds
= stat_task
->offset_seconds
;
481 s
->seconds_total
= stat_task
->length_seconds
;
484 /* returns slot num on success */
485 static int open_receiver(int format
)
487 struct audio_format_info
*a
= &afi
[format
];
490 struct receiver
*r
= a
->receiver
;
491 struct receiver_node
*rn
;
492 const struct timeval restart_delay
= {2, 0};
494 ret
= get_empty_slot();
500 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
501 rn
= s
->receiver_node
;
503 rn
->conf
= a
->receiver_conf
;
504 rn
->btrn
= btr_new_node(r
->name
, NULL
, NULL
, rn
);
507 btr_free_node(rn
->btrn
);
509 s
->receiver_node
= NULL
;
512 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
513 audio_formats
[s
->format
], r
->name
, slot_num
);
514 rn
->task
.pre_select
= r
->pre_select
;
515 rn
->task
.post_select
= r
->post_select
;
516 sprintf(rn
->task
.status
, "%s receiver node", r
->name
);
517 register_task(&rn
->task
);
521 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
522 tv_add(now
, &restart_delay
, &afi
[format
].restart_barrier
);
526 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
527 static int receiver_running(int format
)
532 struct slot_info
*s
= &slot
[i
];
533 if (s
->format
!= format
)
535 if (!s
->receiver_node
)
537 if (s
->receiver_node
->task
.error
>= 0)
544 struct btr_node
*audiod_get_btr_root(void)
546 int i
, newest_slot
= -1;
547 struct timeval newest_rstime
= {0, 0};
550 struct slot_info
*s
= &slot
[i
];
551 struct timeval rstime
;
552 if (!s
->receiver_node
)
554 if (s
->receiver_node
->task
.error
< 0)
556 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
557 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
559 newest_rstime
= rstime
;
562 if (newest_slot
== -1)
564 return slot
[newest_slot
].receiver_node
->btrn
;
567 /* returns slot num on success. */
568 static int open_current_receiver(struct sched
*s
)
571 int ret
, cafn
= stat_task
->current_audio_format_num
;
573 if (cafn
< 0 || !stat_task
->ct
)
575 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
576 if (stat_task
->vss_status
!= VSS_STATUS_FLAG_PLAYING
)
578 ret
= receiver_running(cafn
);
579 if (ret
> 0) /* already running and not eof */
581 if (ret
< 0) { /* eof */
583 * para_server uses a zero start time during the announcement
584 * period, i.e. before it sends the first chunk. Wait until
585 * this period begins to avoid restarting the receiver that
586 * belongs to the file just completed.
588 if (stat_task
->server_stream_start
.tv_sec
!= 0)
591 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, &diff
) < 0) {
592 /* avoid busy loop */
596 /* start a new receiver */
597 return open_receiver(cafn
);
600 static unsigned compute_time_diff(const struct timeval
*status_time
)
602 struct timeval tmp
, diff
;
603 static unsigned count
;
604 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
605 const struct timeval max_deviation
= {0, 500 * 1000};
606 const int time_smooth
= 5;
610 sign
= tv_diff(status_time
, now
, &diff
);
611 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
612 // sign, sa_time_diff_sign);
614 sa_time_diff_sign
= sign
;
615 stat_task
->sa_time_diff
= diff
;
620 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
621 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
622 PARA_WARNING_LOG("time diff jump: %lims\n",
626 sa_time_diff_sign
= tv_convex_combination(
627 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
628 count
> 10? sign
: sign
* time_smooth
, &diff
,
630 stat_task
->sa_time_diff
= tmp
;
631 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
634 sa_time_diff_sign
? "+" : "-",
635 tv2ms(&stat_task
->sa_time_diff
)
638 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
642 static int update_item(int itemnum
, char *buf
)
644 long unsigned sec
, usec
;
646 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
648 free(stat_item_values
[itemnum
]);
649 stat_item_values
[itemnum
] = para_strdup(buf
);
650 stat_client_write_item(itemnum
);
652 case SI_STATUS_FLAGS
:
653 stat_task
->vss_status
= 0;
654 if (strchr(buf
, 'N'))
655 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
656 if (strchr(buf
, 'P'))
657 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
660 stat_task
->offset_seconds
= atoi(buf
);
662 case SI_SECONDS_TOTAL
:
663 stat_task
->length_seconds
= atoi(buf
);
665 case SI_STREAM_START
:
666 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
667 struct timeval a_start
, delay
;
668 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
669 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
670 stat_task
->server_stream_start
.tv_sec
= sec
;
671 stat_task
->server_stream_start
.tv_usec
= usec
;
672 if (compute_time_diff(NULL
) > 2) {
673 if (stat_task
->sa_time_diff_sign
< 0)
674 tv_add(&stat_task
->server_stream_start
,
675 &stat_task
->sa_time_diff
, &a_start
);
677 tv_diff(&stat_task
->server_stream_start
,
678 &stat_task
->sa_time_diff
, &a_start
);
679 tv_add(&a_start
, &delay
, &initial_delay_barrier
);
683 case SI_CURRENT_TIME
:
684 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
685 struct timeval tv
= {sec
, usec
};
686 compute_time_diff(&tv
);
690 stat_task
->current_audio_format_num
691 = get_audio_format_num(buf
);
696 static int parse_stream_command(const char *txt
, char **cmd
)
698 char *p
= strchr(txt
, ':');
702 return -E_MISSING_COLON
;
704 FOR_EACH_AUDIO_FORMAT(i
) {
705 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
710 return -E_UNSUPPORTED_AUDIO_FORMAT
;
713 static int add_filter(int format
, char *cmdline
)
715 struct audio_format_info
*a
= &afi
[format
];
716 int filter_num
, nf
= a
->num_filters
;
718 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
721 a
->filter_nums
[nf
] = filter_num
;
723 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
724 filters
[filter_num
].name
);
728 static int parse_writer_args(void)
732 struct audio_format_info
*a
;
734 nw
= PARA_MAX(1U, conf
.writer_given
);
735 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
736 FOR_EACH_AUDIO_FORMAT(i
) {
738 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
739 a
->writer_nums
= para_malloc(nw
* sizeof(int));
742 for (i
= 0; i
< conf
.writer_given
; i
++) {
745 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
750 wconf
= check_writer_arg(cmd
, &writer_num
);
755 a
->writer_nums
[nw
] = writer_num
;
756 a
->writer_conf
[nw
] = wconf
;
757 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
758 nw
, writer_names
[writer_num
]);
766 static int parse_receiver_args(void)
768 int i
, ret
, receiver_num
;
770 struct audio_format_info
*a
;
772 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
773 char *arg
= conf
.receiver_arg
[i
];
774 char *recv_arg
= strchr(arg
, ':');
775 ret
= -E_MISSING_COLON
;
780 ret
= get_audio_format_num(arg
);
783 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
784 if (!afi
[ret
].receiver_conf
) {
785 ret
= -E_RECV_SYNTAX
;
788 afi
[ret
].receiver
= &receivers
[receiver_num
];
790 /* use the first available receiver with no arguments
791 * for those audio formats for which no receiver
794 cmd
= para_strdup(receivers
[0].name
);
795 FOR_EACH_AUDIO_FORMAT(i
) {
797 if (a
->receiver_conf
)
799 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
800 if (!a
->receiver_conf
)
801 return -E_RECV_SYNTAX
;
802 a
->receiver
= &receivers
[receiver_num
];
810 static int init_default_filters(void)
814 FOR_EACH_AUDIO_FORMAT(i
) {
815 struct audio_format_info
*a
= &afi
[i
];
820 continue; /* no default -- nothing to to */
821 /* add "dec" to audio format name */
822 tmp
= make_message("%sdec", audio_formats
[i
]);
823 for (j
= 0; filters
[j
].name
; j
++)
824 if (!strcmp(tmp
, filters
[j
].name
))
827 ret
= -E_UNSUPPORTED_FILTER
;
828 if (!filters
[j
].name
)
830 tmp
= para_strdup(filters
[j
].name
);
831 ret
= add_filter(i
, tmp
);
835 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
842 static int parse_filter_args(void)
846 nf
= PARA_MAX(1U, conf
.filter_given
);
847 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
848 FOR_EACH_AUDIO_FORMAT(i
) {
849 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
850 afi
[i
].filter_nums
= para_malloc(nf
* sizeof(unsigned));
852 if (!conf
.no_default_filters_given
)
853 return init_default_filters();
854 for (i
= 0; i
< conf
.filter_given
; i
++) {
855 char *arg
= conf
.filter_arg
[i
];
856 char *filter_name
= strchr(arg
, ':');
857 ret
= -E_MISSING_COLON
;
862 ret
= get_audio_format_num(arg
);
865 ret
= add_filter(ret
, filter_name
);
869 ret
= init_default_filters(); /* use default values for the rest */
874 static int parse_stream_args(void)
878 ret
= parse_receiver_args();
881 ret
= parse_filter_args();
884 ret
= parse_writer_args();
890 /* does not unlink socket on errors */
891 static int audiod_get_socket(void)
893 struct sockaddr_un unix_addr
;
896 if (conf
.socket_given
)
897 socket_name
= para_strdup(conf
.socket_arg
);
899 char *hn
= para_hostname();
900 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
904 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
905 if (conf
.force_given
)
907 ret
= create_local_socket(socket_name
, &unix_addr
,
908 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
912 if (listen(fd
, 5) < 0) {
913 ret
= -ERRNO_TO_PARA_ERROR(errno
);
916 ret
= mark_fd_nonblocking(fd
);
921 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
925 static void signal_pre_select(struct sched
*s
, struct task
*t
)
927 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
928 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
931 static void signal_post_select(struct sched
*s
, struct task
*t
)
933 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
935 if (!FD_ISSET(st
->fd
, &s
->rfds
))
938 st
->signum
= para_next_signal();
939 switch (st
->signum
) {
943 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
944 clean_exit(EXIT_FAILURE
, "caught deadly signal");
948 static void signal_setup_default(struct signal_task
*st
)
950 st
->task
.pre_select
= signal_pre_select
;
951 st
->task
.post_select
= signal_post_select
;
952 sprintf(st
->task
.status
, "signal task");
955 static void command_pre_select(struct sched
*s
, struct task
*t
)
957 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
958 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
961 static void command_post_select(struct sched
*s
, struct task
*t
)
964 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
965 static struct timeval last_status_dump
;
966 struct timeval tmp
, delay
= {0, 500 * 1000};
968 tv_add(&last_status_dump
, &delay
, &tmp
);
969 if (tv_diff(&tmp
, now
, NULL
) < 0) {
970 audiod_status_dump();
971 last_status_dump
= *now
;
974 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
976 ret
= handle_connect(ct
->fd
);
978 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
981 static void init_command_task(struct command_task
*ct
)
983 ct
->task
.pre_select
= command_pre_select
;
984 ct
->task
.post_select
= command_post_select
;
986 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
987 sprintf(ct
->task
.status
, "command task");
990 static void close_stat_pipe(void)
994 client_close(stat_task
->ct
);
995 stat_task
->ct
= NULL
;
996 clear_and_dump_items();
997 stat_task
->length_seconds
= 0;
998 stat_task
->offset_seconds
= 0;
999 stat_task
->vss_status
= 0;
1000 stat_task
->current_audio_format_num
= -1;
1001 audiod_status_dump();
1005 * close the connection to para_server and exit
1007 * \param status the exit status which is passed to exit(3)
1008 * \param msg the log message
1010 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1011 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1016 void __noreturn
clean_exit(int status
, const char *msg
)
1018 PARA_EMERG_LOG("%s\n", msg
);
1020 unlink(socket_name
);
1025 /* avoid busy loop if server is down */
1026 static void set_stat_task_restart_barrier(unsigned seconds
)
1028 struct timeval delay
= {seconds
, 0};
1029 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1032 static void try_to_close_slot(int slot_num
)
1034 struct slot_info
*s
= &slot
[slot_num
];
1035 struct audio_format_info
*a
= afi
+ s
->format
;
1040 if (s
->receiver_node
&& s
->receiver_node
->task
.error
!= -E_TASK_UNREGISTERED
)
1042 for (i
= 0; i
< a
->num_filters
; i
++)
1043 if (s
->fns
&& s
->fns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1045 for (i
= 0; i
< a
->num_writers
; i
++)
1046 if (s
->wns
&& s
->wns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1048 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1051 close_receiver(slot_num
);
1052 clear_slot(slot_num
);
1056 * Check if any receivers/filters/writers need to be started and do so if
1059 static void start_stop_decoders(struct sched
*s
)
1062 struct slot_info
*sl
;
1063 struct audio_format_info
*a
;
1066 try_to_close_slot(i
);
1067 // if (audiod_status != AUDIOD_ON ||
1068 // !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1069 // return kill_all_decoders(-E_NOT_PLAYING);
1070 ret
= open_current_receiver(s
);
1074 a
= afi
+ sl
->format
;
1078 activate_grab_clients();
1079 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1080 s
->timeout
.tv_sec
= 0;
1081 s
->timeout
.tv_usec
= 1;
1084 /* restart the client task if necessary */
1085 static void status_pre_select(struct sched
*s
, struct task
*t
)
1087 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1089 if (audiod_status
== AUDIOD_OFF
) {
1092 if (st
->ct
->task
.error
>= 0) {
1093 st
->ct
->task
.error
= -E_AUDIOD_OFF
;
1096 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1099 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1104 if (st
->ct
->task
.error
< 0) {
1105 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1110 if (st
->ct
->status
!= CL_RECEIVING
)
1112 ret
= for_each_stat_item(st
->ct
->buf
, st
->ct
->loaded
,
1115 st
->ct
->task
.error
= ret
;
1118 if (st
->ct
->loaded
!= ret
) {
1119 st
->last_status_read
= *now
;
1120 st
->ct
->loaded
= ret
;
1122 struct timeval diff
;
1123 tv_diff(now
, &st
->last_status_read
, &diff
);
1124 if (diff
.tv_sec
> 61)
1125 st
->ct
->task
.error
= -E_STATUS_TIMEOUT
;
1129 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1131 if (st
->clock_diff_count
) { /* get status only one time */
1132 char *argv
[] = {"audiod", "--", "stat", "-p", "1", NULL
};
1134 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1135 st
->clock_diff_count
--;
1136 client_open(argc
, argv
, &st
->ct
, NULL
);
1137 set_stat_task_restart_barrier(2);
1140 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1142 client_open(argc
, argv
, &st
->ct
, NULL
);
1143 set_stat_task_restart_barrier(5);
1145 free(stat_item_values
[SI_BASENAME
]);
1146 stat_item_values
[SI_BASENAME
] = para_strdup(
1147 "no connection to para_server");
1148 stat_client_write_item(SI_BASENAME
);
1149 st
->last_status_read
= *now
;
1151 start_stop_decoders(s
);
1154 static void init_status_task(struct status_task
*st
)
1156 memset(st
, 0, sizeof(struct status_task
));
1157 st
->task
.pre_select
= status_pre_select
;
1158 st
->sa_time_diff_sign
= 1;
1159 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1160 st
->current_audio_format_num
= -1;
1161 sprintf(st
->task
.status
, "status task");
1164 static void set_initial_status(void)
1166 audiod_status
= AUDIOD_ON
;
1167 if (!conf
.mode_given
)
1169 if (!strcmp(conf
.mode_arg
, "sb")) {
1170 audiod_status
= AUDIOD_STANDBY
;
1173 if (!strcmp(conf
.mode_arg
, "off")) {
1174 audiod_status
= AUDIOD_OFF
;
1177 if (strcmp(conf
.mode_arg
, "on"))
1178 PARA_WARNING_LOG("invalid mode\n");
1181 __noreturn
static void print_help_and_die(void)
1183 int d
= conf
.detailed_help_given
;
1184 const char **p
= d
? audiod_args_info_detailed_help
1185 : audiod_args_info_help
;
1187 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1188 AUDIOD_CMDLINE_PARSER_VERSION
);
1189 printf_or_die("%s\n\n", audiod_args_info_usage
);
1191 printf_or_die("%s\n", *p
);
1192 print_receiver_helps(d
);
1193 print_filter_helps(d
);
1194 print_writer_helps(d
);
1198 static void init_colors_or_die(void)
1204 daemon_set_default_log_colors();
1205 daemon_set_flag(DF_COLOR_LOG
);
1206 for (i
= 0; i
< conf
.log_color_given
; i
++) {
1207 ret
= daemon_set_log_color(conf
.log_color_arg
[i
]);
1214 * the main function of para_audiod
1216 * \param argc usual argument count
1217 * \param argv usual argument vector
1219 * \return EXIT_SUCCESS or EXIT_FAILURE
1221 * \sa para_audiod(1)
1223 int main(int argc
, char *argv
[])
1226 static struct sched s
;
1227 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1228 struct audiod_cmdline_parser_params params
= {
1231 .check_required
= 0,
1232 .check_ambiguity
= 0,
1237 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1239 HANDLE_VERSION_FLAG("audiod", conf
);
1240 /* init receivers/filters/writers early to make help work */
1244 if (conf
.help_given
|| conf
.detailed_help_given
)
1245 print_help_and_die();
1246 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1247 parse_config_or_die();
1248 init_colors_or_die();
1249 init_random_seed_or_die();
1250 daemon_set_flag(DF_LOG_TIME
);
1251 daemon_set_flag(DF_LOG_HOSTNAME
);
1252 daemon_set_flag(DF_LOG_LL
);
1253 if (conf
.log_timing_given
)
1254 daemon_set_flag(DF_LOG_TIMING
);
1255 if (conf
.logfile_given
) {
1256 daemon_set_logfile(conf
.logfile_arg
);
1257 daemon_open_log_or_die();
1259 ret
= parse_stream_args();
1261 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1264 log_welcome("para_audiod");
1265 server_uptime(UPTIME_SET
);
1266 set_initial_status();
1270 setup_signal_handling();
1271 signal_setup_default(sig_task
);
1273 init_status_task(stat_task
);
1274 init_command_task(cmd_task
);
1276 if (conf
.daemon_given
)
1279 register_task(&sig_task
->task
);
1280 register_task(&cmd_task
->task
);
1281 register_task(&stat_task
->task
);
1282 s
.default_timeout
.tv_sec
= 2;
1283 s
.default_timeout
.tv_usec
= 999 * 1000;
1286 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1287 return EXIT_FAILURE
;