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
;
113 /* The status task btrn is the child of the client task. */
114 struct btr_node
*btrn
;
117 /** The array of status items sent by para_server. */
118 char *stat_item_values
[NUM_STAT_ITEMS
] = {NULL
};
121 * the current mode of operation of which can be changed by the on/off/cycle
122 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
124 int audiod_status
= AUDIOD_ON
;
127 * the gengetopt args_info struct that holds information on all command line
130 struct audiod_args_info conf
;
132 static char *socket_name
;
133 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
135 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
137 static struct status_task status_task_struct
;
140 * the task that calls the status command of para_server
142 * \sa struct status_task
144 static struct status_task
*stat_task
= &status_task_struct
;
145 static struct timeval initial_delay_barrier
;
148 * the task for handling audiod commands
150 * \sa struct task, struct sched
152 struct command_task
{
153 /** the local listening socket */
155 /** the associated task structure */
159 /** iterate over all supported audio formats */
160 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
163 * get the audio format number
164 * \param name the name of the audio format
166 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
167 * \a name is not a supported audio format.
169 int get_audio_format_num(const char *name
)
173 while (para_isspace(*name
))
175 FOR_EACH_AUDIO_FORMAT(i
)
176 if (!strcmp(name
, audio_formats
[i
]))
178 return -E_UNSUPPORTED_AUDIO_FORMAT
;
181 char *get_time_string(int slot_num
)
183 int ret
, seconds
= 0, length
;
184 struct timeval
*tmp
, sum
, sss
, /* server stream start */
185 rstime
, /* receiver start time */
186 wstime
, /* writer start time */
187 wtime
, /* now - writer start */
188 rskip
; /* receiver start - sss */
189 struct slot_info
*s
= slot_num
< 0? NULL
: &slot
[slot_num
];
192 if (audiod_status
== AUDIOD_OFF
)
194 if (!(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)) {
195 if (stat_task
->length_seconds
) /* paused */
197 goto empty
; /* stopped */
199 if (audiod_status
== AUDIOD_ON
&& !s
)
202 * Valid status items and playing, set length and tmp to the stream
203 * start. We use the slot info and fall back to the info from current
204 * status items if no slot info is available.
206 length
= stat_task
->length_seconds
;
207 tmp
= &stat_task
->server_stream_start
;
208 if (s
&& s
->wns
) { /* writer active in this slot */
209 btr_get_node_start(s
->wns
[0].btrn
, &wstime
);
210 if (wstime
.tv_sec
!= 0) { /* writer wrote something */
211 if (s
->server_stream_start
.tv_sec
== 0) {
212 /* copy status info to slot */
213 s
->server_stream_start
= stat_task
->server_stream_start
;
214 s
->offset_seconds
= stat_task
->offset_seconds
;
215 s
->seconds_total
= stat_task
->length_seconds
;
217 length
= s
->seconds_total
;
218 tmp
= &s
->server_stream_start
;
221 if (stat_task
->sa_time_diff_sign
> 0)
222 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
224 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
227 tv_diff(now
, &sss
, &diff
);
228 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
231 tv_diff(now
, &wstime
, &wtime
);
232 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
233 seconds
= s
->offset_seconds
;
234 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
235 ret
= tv_diff(&rstime
, &sss
, &rskip
);
236 if (ret
> 0) { /* audiod was started in the middle of the stream */
237 tv_add(&wtime
, &rskip
, &sum
);
238 seconds
+= sum
.tv_sec
;
240 seconds
+= wtime
.tv_sec
;
242 seconds
= PARA_MIN(seconds
, length
);
243 seconds
= PARA_MAX(seconds
, 0);
245 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
249 (length
- seconds
) / 60,
250 (length
- seconds
) % 60,
251 length
? (seconds
* 100 + length
/ 2) / length
: 0,
255 PARA_DEBUG_LOG("slot %d: %s\n", slot_num
, msg
);
258 return para_strdup(NULL
);
261 static int want_colors(void)
263 if (conf
.color_arg
== color_arg_no
)
265 if (conf
.color_arg
== color_arg_yes
)
267 if (conf
.logfile_given
)
269 return isatty(STDERR_FILENO
);
272 static void parse_config_or_die(void)
276 struct audiod_cmdline_parser_params params
= {
280 .check_ambiguity
= 0,
284 if (conf
.config_file_given
)
285 config_file
= para_strdup(conf
.config_file_arg
);
287 char *home
= para_homedir();
288 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
291 ret
= file_exists(config_file
);
292 if (conf
.config_file_given
&& !ret
) {
293 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
297 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
299 daemon_set_loglevel(conf
.loglevel_arg
);
306 static void setup_signal_handling(void)
308 sig_task
->fd
= para_signal_init();
309 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
310 para_install_sighandler(SIGINT
);
311 para_install_sighandler(SIGTERM
);
312 para_install_sighandler(SIGHUP
);
313 para_sigaction(SIGPIPE
, SIG_IGN
);
316 static void clear_slot(int slot_num
)
318 struct slot_info
*s
= &slot
[slot_num
];
320 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
321 memset(s
, 0, sizeof(struct slot_info
));
325 static void close_receiver(int slot_num
)
327 struct slot_info
*s
= &slot
[slot_num
];
328 struct audio_format_info
*a
;
329 struct timeval restart_delay
= {0, 200 * 1000};
331 if (s
->format
< 0 || !s
->receiver_node
)
334 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
335 audio_formats
[s
->format
], slot_num
);
336 a
->receiver
->close(s
->receiver_node
);
337 btr_free_node(s
->receiver_node
->btrn
);
338 free(s
->receiver_node
);
339 s
->receiver_node
= NULL
;
340 tv_add(now
, &restart_delay
, &afi
[s
->format
].restart_barrier
);
343 static void writer_cleanup(struct writer_node
*wn
)
349 w
= writers
+ wn
->writer_num
;
350 PARA_INFO_LOG("closing %s\n", writer_names
[wn
->writer_num
]);
352 btr_free_node(wn
->btrn
);
355 static void close_writers(struct slot_info
*s
)
357 struct audio_format_info
*a
;
364 if (a
->num_writers
== 0)
365 writer_cleanup(s
->wns
);
367 for (i
= 0; i
< a
->num_writers
; i
++)
368 writer_cleanup(s
->wns
+ i
);
374 static void close_filters(struct slot_info
*s
)
377 struct audio_format_info
*a
= afi
+ s
->format
;
378 if (a
->num_filters
== 0)
380 for (i
= 0; i
< a
->num_filters
; i
++) {
381 struct filter_node
*fn
= s
->fns
+ i
;
386 f
= filters
+ fn
->filter_num
;
389 btr_free_node(fn
->btrn
);
396 * Whenever a task commits suicide by returning from post_select with t->error
397 * < 0, it also removes its btr node. We do exactly that to kill a running
398 * task. Note that the scheduler checks t->error also _before_ each pre/post
399 * select call, so the victim will never be scheduled again.
401 static void kill_btrn(struct btr_node
*btrn
, struct task
*t
, int error
)
406 btr_remove_node(btrn
);
409 static void kill_all_decoders(int error
)
414 struct slot_info
*s
= &slot
[i
];
415 struct audio_format_info
*a
;
420 for (j
= 0; j
< a
->num_writers
; j
++)
421 kill_btrn(s
->wns
[j
].btrn
, &s
->wns
[j
].task
, error
);
423 for (j
= 0; j
< a
->num_writers
; j
++)
424 kill_btrn(s
->fns
[j
].btrn
, &s
->wns
[j
].task
, error
);
425 if (s
->receiver_node
)
426 kill_btrn(s
->receiver_node
->btrn
, &s
->receiver_node
->task
,
431 static int get_empty_slot(void)
442 if (s
->wns
|| s
->receiver_node
|| s
->fns
)
447 return -E_NO_MORE_SLOTS
;
451 * get the number of filters
453 * \param audio_format_num the number identifying the audio format
455 * \return the number of filters for the given audio format
459 int num_filters(int audio_format_num
)
461 return afi
[audio_format_num
].num_filters
;
464 static void open_filters(struct slot_info
*s
)
466 struct audio_format_info
*a
= afi
+ s
->format
;
467 struct filter_node
*fn
;
468 int nf
= a
->num_filters
;
469 struct btr_node
*parent
;
474 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
475 assert(s
->fns
== NULL
);
476 s
->fns
= para_calloc(nf
* sizeof(struct filter_node
));
477 parent
= s
->receiver_node
->btrn
;
478 for (i
= 0; i
< nf
; i
++) {
479 struct filter
*f
= filters
+ a
->filter_nums
[i
];
481 fn
->filter_num
= a
->filter_nums
[i
];
482 fn
->conf
= a
->filter_conf
[i
];
483 fn
->task
.pre_select
= f
->pre_select
;
484 fn
->task
.post_select
= f
->post_select
;
486 fn
->btrn
= btr_new_node(&(struct btr_node_description
)
487 EMBRACE(.name
= f
->name
, .parent
= parent
,
488 .handler
= f
->execute
, .context
= fn
));
491 register_task(&fn
->task
);
493 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
494 audio_formats
[s
->format
], i
, nf
, f
->name
, (int)(s
- slot
));
495 sprintf(fn
->task
.status
, "%s (slot %d)", f
->name
, (int)(s
- slot
));
499 static void open_writers(struct slot_info
*s
)
502 struct audio_format_info
*a
= afi
+ s
->format
;
503 struct writer_node
*wn
;
504 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
506 assert(s
->wns
== NULL
);
507 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
508 * sizeof(struct writer_node
));
509 if (a
->num_writers
== 0)
510 setup_writer_node(NULL
, parent
, s
->wns
);
512 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
513 for (i
= 0; i
< a
->num_writers
; i
++) {
515 wn
->conf
= a
->writer_conf
[i
];
516 wn
->writer_num
= a
->writer_nums
[i
];
517 register_writer_node(wn
, parent
);
522 /* returns slot num on success */
523 static int open_receiver(int format
)
525 struct audio_format_info
*a
= &afi
[format
];
528 struct receiver
*r
= a
->receiver
;
529 struct receiver_node
*rn
;
530 const struct timeval restart_delay
= {2, 0};
532 ret
= get_empty_slot();
538 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
539 rn
= s
->receiver_node
;
541 rn
->conf
= a
->receiver_conf
;
542 rn
->btrn
= btr_new_node(&(struct btr_node_description
)
543 EMBRACE(.name
= r
->name
, .context
= rn
));
546 btr_free_node(rn
->btrn
);
548 s
->receiver_node
= NULL
;
551 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
552 audio_formats
[s
->format
], r
->name
, slot_num
);
553 rn
->task
.pre_select
= r
->pre_select
;
554 rn
->task
.post_select
= r
->post_select
;
555 sprintf(rn
->task
.status
, "%s receiver node", r
->name
);
556 register_task(&rn
->task
);
560 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
561 tv_add(now
, &restart_delay
, &afi
[format
].restart_barrier
);
565 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
566 static int receiver_running(int format
)
571 struct slot_info
*s
= &slot
[i
];
572 if (s
->format
!= format
)
574 if (!s
->receiver_node
)
576 if (s
->receiver_node
->task
.error
>= 0)
583 struct btr_node
*audiod_get_btr_root(void)
585 int i
, newest_slot
= -1;
586 struct timeval newest_rstime
= {0, 0};
589 struct slot_info
*s
= &slot
[i
];
590 struct timeval rstime
;
591 if (!s
->receiver_node
)
593 if (s
->receiver_node
->task
.error
< 0)
595 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
596 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
598 newest_rstime
= rstime
;
601 if (newest_slot
== -1)
603 return slot
[newest_slot
].receiver_node
->btrn
;
606 /* whether a new instance of a decoder should be started. */
607 static bool must_start_decoder(void)
609 int ret
, cafn
= stat_task
->current_audio_format_num
;
611 if (cafn
< 0 || !stat_task
->ct
)
613 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
614 if (stat_task
->vss_status
!= VSS_STATUS_FLAG_PLAYING
)
616 ret
= receiver_running(cafn
);
617 if (ret
!= 0) /* already running */
619 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, NULL
) < 0)
624 static unsigned compute_time_diff(const struct timeval
*status_time
)
626 struct timeval tmp
, diff
;
627 static unsigned count
;
628 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
629 const struct timeval max_deviation
= {0, 500 * 1000};
630 const int time_smooth
= 5;
634 sign
= tv_diff(status_time
, now
, &diff
);
635 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
636 // sign, sa_time_diff_sign);
638 sa_time_diff_sign
= sign
;
639 stat_task
->sa_time_diff
= diff
;
644 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
645 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
646 PARA_WARNING_LOG("time diff jump: %lims\n",
650 sa_time_diff_sign
= tv_convex_combination(
651 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
652 count
> 10? sign
: sign
* time_smooth
, &diff
,
654 stat_task
->sa_time_diff
= tmp
;
655 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
658 sa_time_diff_sign
< 0? "-" : "+",
659 tv2ms(&stat_task
->sa_time_diff
)
662 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
666 static int update_item(int itemnum
, char *buf
)
668 long unsigned sec
, usec
;
670 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
672 free(stat_item_values
[itemnum
]);
673 stat_item_values
[itemnum
] = para_strdup(buf
);
674 stat_client_write_item(itemnum
);
676 case SI_STATUS_FLAGS
:
677 stat_task
->vss_status
= 0;
678 if (strchr(buf
, 'N'))
679 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
680 if (strchr(buf
, 'P'))
681 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
684 stat_task
->offset_seconds
= atoi(buf
);
686 case SI_SECONDS_TOTAL
:
687 stat_task
->length_seconds
= atoi(buf
);
689 case SI_STREAM_START
:
690 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
691 struct timeval a_start
, delay
;
692 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
693 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
694 stat_task
->server_stream_start
.tv_sec
= sec
;
695 stat_task
->server_stream_start
.tv_usec
= usec
;
696 if (compute_time_diff(NULL
) > 2) {
697 if (stat_task
->sa_time_diff_sign
< 0)
698 tv_add(&stat_task
->server_stream_start
,
699 &stat_task
->sa_time_diff
, &a_start
);
701 tv_diff(&stat_task
->server_stream_start
,
702 &stat_task
->sa_time_diff
, &a_start
);
703 tv_add(&a_start
, &delay
, &initial_delay_barrier
);
707 case SI_CURRENT_TIME
:
708 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
709 struct timeval tv
= {sec
, usec
};
710 compute_time_diff(&tv
);
714 stat_task
->current_audio_format_num
715 = get_audio_format_num(buf
);
720 static int parse_stream_command(const char *txt
, char **cmd
)
722 char *p
= strchr(txt
, ':');
726 return -E_MISSING_COLON
;
728 FOR_EACH_AUDIO_FORMAT(i
) {
729 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
734 return -E_UNSUPPORTED_AUDIO_FORMAT
;
737 static int add_filter(int format
, char *cmdline
)
739 struct audio_format_info
*a
= &afi
[format
];
740 int filter_num
, nf
= a
->num_filters
;
742 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
745 a
->filter_nums
[nf
] = filter_num
;
747 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
748 filters
[filter_num
].name
);
752 static int parse_writer_args(void)
756 struct audio_format_info
*a
;
758 nw
= PARA_MAX(1U, conf
.writer_given
);
759 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
760 FOR_EACH_AUDIO_FORMAT(i
) {
762 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
763 a
->writer_nums
= para_malloc(nw
* sizeof(int));
766 for (i
= 0; i
< conf
.writer_given
; i
++) {
769 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
774 wconf
= check_writer_arg(cmd
, &writer_num
);
779 a
->writer_nums
[nw
] = writer_num
;
780 a
->writer_conf
[nw
] = wconf
;
781 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
782 nw
, writer_names
[writer_num
]);
790 static int parse_receiver_args(void)
792 int i
, ret
, receiver_num
;
794 struct audio_format_info
*a
;
796 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
797 char *arg
= conf
.receiver_arg
[i
];
798 char *recv_arg
= strchr(arg
, ':');
799 ret
= -E_MISSING_COLON
;
804 ret
= get_audio_format_num(arg
);
807 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
808 if (!afi
[ret
].receiver_conf
) {
809 ret
= -E_RECV_SYNTAX
;
812 afi
[ret
].receiver
= &receivers
[receiver_num
];
814 /* use the first available receiver with no arguments
815 * for those audio formats for which no receiver
818 cmd
= para_strdup(receivers
[0].name
);
819 FOR_EACH_AUDIO_FORMAT(i
) {
821 if (a
->receiver_conf
)
823 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
824 if (!a
->receiver_conf
)
825 return -E_RECV_SYNTAX
;
826 a
->receiver
= &receivers
[receiver_num
];
834 static int init_default_filters(void)
838 FOR_EACH_AUDIO_FORMAT(i
) {
839 struct audio_format_info
*a
= &afi
[i
];
844 continue; /* no default -- nothing to to */
845 /* add "dec" to audio format name */
846 tmp
= make_message("%sdec", audio_formats
[i
]);
847 for (j
= 0; filters
[j
].name
; j
++)
848 if (!strcmp(tmp
, filters
[j
].name
))
851 ret
= -E_UNSUPPORTED_FILTER
;
852 if (!filters
[j
].name
)
854 tmp
= para_strdup(filters
[j
].name
);
855 ret
= add_filter(i
, tmp
);
859 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
866 static int parse_filter_args(void)
870 nf
= PARA_MAX(1U, conf
.filter_given
);
871 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
872 FOR_EACH_AUDIO_FORMAT(i
) {
873 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
874 afi
[i
].filter_nums
= para_malloc(nf
* sizeof(unsigned));
876 if (!conf
.no_default_filters_given
)
877 return init_default_filters();
878 for (i
= 0; i
< conf
.filter_given
; i
++) {
879 char *arg
= conf
.filter_arg
[i
];
880 char *filter_name
= strchr(arg
, ':');
881 ret
= -E_MISSING_COLON
;
886 ret
= get_audio_format_num(arg
);
889 ret
= add_filter(ret
, filter_name
);
893 ret
= init_default_filters(); /* use default values for the rest */
898 static int parse_stream_args(void)
902 ret
= parse_receiver_args();
905 ret
= parse_filter_args();
908 ret
= parse_writer_args();
914 /* does not unlink socket on errors */
915 static int audiod_get_socket(void)
917 struct sockaddr_un unix_addr
;
920 if (conf
.socket_given
)
921 socket_name
= para_strdup(conf
.socket_arg
);
923 char *hn
= para_hostname();
924 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
928 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
929 if (conf
.force_given
)
931 ret
= create_local_socket(socket_name
, &unix_addr
,
932 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
936 if (listen(fd
, 5) < 0) {
937 ret
= -ERRNO_TO_PARA_ERROR(errno
);
940 ret
= mark_fd_nonblocking(fd
);
945 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
949 static void signal_pre_select(struct sched
*s
, struct task
*t
)
951 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
952 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
955 static void signal_post_select(struct sched
*s
, struct task
*t
)
957 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
959 if (!FD_ISSET(st
->fd
, &s
->rfds
))
962 st
->signum
= para_next_signal();
963 switch (st
->signum
) {
967 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
968 clean_exit(EXIT_FAILURE
, "caught deadly signal");
972 static void signal_setup_default(struct signal_task
*st
)
974 st
->task
.pre_select
= signal_pre_select
;
975 st
->task
.post_select
= signal_post_select
;
976 sprintf(st
->task
.status
, "signal task");
979 static void command_pre_select(struct sched
*s
, struct task
*t
)
981 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
982 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
985 static void command_post_select(struct sched
*s
, struct task
*t
)
988 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
989 static struct timeval last_status_dump
;
990 struct timeval tmp
, delay
= {0, 500 * 1000};
992 tv_add(&last_status_dump
, &delay
, &tmp
);
993 if (tv_diff(&tmp
, now
, NULL
) < 0) {
994 audiod_status_dump();
995 last_status_dump
= *now
;
998 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
1000 ret
= handle_connect(ct
->fd
);
1002 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1005 static void init_command_task(struct command_task
*ct
)
1007 ct
->task
.pre_select
= command_pre_select
;
1008 ct
->task
.post_select
= command_post_select
;
1010 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1011 sprintf(ct
->task
.status
, "command task");
1014 static void close_stat_pipe(void)
1018 btr_free_node(stat_task
->ct
->btrn
);
1019 client_close(stat_task
->ct
);
1020 stat_task
->ct
= NULL
;
1021 clear_and_dump_items();
1022 stat_task
->length_seconds
= 0;
1023 stat_task
->offset_seconds
= 0;
1024 stat_task
->vss_status
= 0;
1025 stat_task
->current_audio_format_num
= -1;
1026 audiod_status_dump();
1030 * close the connection to para_server and exit
1032 * \param status the exit status which is passed to exit(3)
1033 * \param msg the log message
1035 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1036 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1041 void __noreturn
clean_exit(int status
, const char *msg
)
1043 PARA_EMERG_LOG("%s\n", msg
);
1045 unlink(socket_name
);
1050 /* avoid busy loop if server is down */
1051 static void set_stat_task_restart_barrier(unsigned seconds
)
1053 struct timeval delay
= {seconds
, 0};
1054 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1057 static void try_to_close_slot(int slot_num
)
1059 struct slot_info
*s
= &slot
[slot_num
];
1060 struct audio_format_info
*a
= afi
+ s
->format
;
1065 if (s
->receiver_node
&& s
->receiver_node
->task
.error
!= -E_TASK_UNREGISTERED
)
1067 for (i
= 0; i
< a
->num_filters
; i
++)
1068 if (s
->fns
&& s
->fns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1070 if (a
->num_writers
> 0) {
1071 for (i
= 0; i
< a
->num_writers
; i
++)
1072 if (s
->wns
&& s
->wns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1075 if (s
->wns
&& s
->wns
[0].task
.error
!= -E_TASK_UNREGISTERED
)
1078 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1081 close_receiver(slot_num
);
1082 clear_slot(slot_num
);
1086 * Check if any receivers/filters/writers need to be started and do so if
1089 static void start_stop_decoders(void)
1092 struct slot_info
*sl
;
1093 struct audio_format_info
*a
;
1096 try_to_close_slot(i
);
1097 if (audiod_status
!= AUDIOD_ON
||
1098 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1099 return kill_all_decoders(-E_NOT_PLAYING
);
1100 if (!must_start_decoder())
1102 ret
= open_receiver(stat_task
->current_audio_format_num
);
1106 a
= afi
+ sl
->format
;
1110 activate_grab_clients();
1111 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1114 static void status_pre_select(struct sched
*s
, struct task
*t
)
1116 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1117 int ret
, cafn
= stat_task
->current_audio_format_num
;
1119 if (must_start_decoder())
1121 ret
= btr_node_status(st
->btrn
, 0, BTR_NT_LEAF
);
1125 sched_request_barrier_or_min_delay(&st
->restart_barrier
, s
);
1127 sched_request_barrier(&afi
[cafn
].restart_barrier
, s
);
1133 /* restart the client task if necessary */
1134 static void status_post_select(__a_unused
struct sched
*s
, struct task
*t
)
1136 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1138 if (audiod_status
== AUDIOD_OFF
) {
1141 if (st
->ct
->task
.error
>= 0) {
1142 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, -E_AUDIOD_OFF
);
1145 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1148 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1155 if (st
->ct
->task
.error
< 0) {
1156 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1161 if (st
->ct
->status
!= CL_RECEIVING
)
1163 ret
= btr_node_status(st
->btrn
, 0, BTR_NT_LEAF
);
1166 sz
= btr_next_buffer(st
->btrn
, &buf
);
1167 ret
= for_each_stat_item(buf
, sz
, update_item
);
1169 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, ret
);
1173 st
->last_status_read
= *now
;
1175 struct timeval diff
;
1176 tv_diff(now
, &st
->last_status_read
, &diff
);
1177 if (diff
.tv_sec
> 61)
1178 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
,
1181 btr_consume(st
->btrn
, sz
- ret
);
1184 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1186 if (st
->clock_diff_count
) { /* get status only one time */
1187 char *argv
[] = {"audiod", "--", "stat", "-p", "-n=1", NULL
};
1189 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1190 st
->clock_diff_count
--;
1191 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1192 set_stat_task_restart_barrier(2);
1195 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1197 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1198 set_stat_task_restart_barrier(5);
1200 free(stat_item_values
[SI_BASENAME
]);
1201 stat_item_values
[SI_BASENAME
] = para_strdup(
1202 "no connection to para_server");
1203 stat_client_write_item(SI_BASENAME
);
1204 st
->last_status_read
= *now
;
1206 start_stop_decoders();
1209 static void init_status_task(struct status_task
*st
)
1211 memset(st
, 0, sizeof(struct status_task
));
1212 st
->task
.pre_select
= status_pre_select
;
1213 st
->task
.post_select
= status_post_select
;
1214 st
->sa_time_diff_sign
= 1;
1215 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1216 st
->current_audio_format_num
= -1;
1217 sprintf(st
->task
.status
, "stat");
1218 st
->btrn
= btr_new_node(&(struct btr_node_description
)
1219 EMBRACE(.name
= "stat"));
1222 static void set_initial_status(void)
1224 audiod_status
= AUDIOD_ON
;
1225 if (!conf
.mode_given
)
1227 if (!strcmp(conf
.mode_arg
, "sb")) {
1228 audiod_status
= AUDIOD_STANDBY
;
1231 if (!strcmp(conf
.mode_arg
, "off")) {
1232 audiod_status
= AUDIOD_OFF
;
1235 if (strcmp(conf
.mode_arg
, "on"))
1236 PARA_WARNING_LOG("invalid mode\n");
1239 __noreturn
static void print_help_and_die(void)
1241 int d
= conf
.detailed_help_given
;
1242 const char **p
= d
? audiod_args_info_detailed_help
1243 : audiod_args_info_help
;
1245 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1246 AUDIOD_CMDLINE_PARSER_VERSION
);
1247 printf_or_die("%s\n\n", audiod_args_info_usage
);
1249 printf_or_die("%s\n", *p
);
1250 print_receiver_helps(d
);
1251 print_filter_helps(d
);
1252 print_writer_helps(d
);
1256 static void init_colors_or_die(void)
1262 daemon_set_default_log_colors();
1263 daemon_set_flag(DF_COLOR_LOG
);
1264 for (i
= 0; i
< conf
.log_color_given
; i
++) {
1265 ret
= daemon_set_log_color(conf
.log_color_arg
[i
]);
1272 * the main function of para_audiod
1274 * \param argc usual argument count
1275 * \param argv usual argument vector
1277 * \return EXIT_SUCCESS or EXIT_FAILURE
1279 * \sa para_audiod(1)
1281 int main(int argc
, char *argv
[])
1284 static struct sched s
;
1285 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1286 struct audiod_cmdline_parser_params params
= {
1289 .check_required
= 0,
1290 .check_ambiguity
= 0,
1295 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1297 HANDLE_VERSION_FLAG("audiod", conf
);
1298 /* init receivers/filters/writers early to make help work */
1302 if (conf
.help_given
|| conf
.detailed_help_given
)
1303 print_help_and_die();
1304 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1305 parse_config_or_die();
1306 init_colors_or_die();
1307 init_random_seed_or_die();
1308 daemon_set_flag(DF_LOG_TIME
);
1309 daemon_set_flag(DF_LOG_HOSTNAME
);
1310 daemon_set_flag(DF_LOG_LL
);
1311 if (conf
.log_timing_given
)
1312 daemon_set_flag(DF_LOG_TIMING
);
1313 if (conf
.logfile_given
) {
1314 daemon_set_logfile(conf
.logfile_arg
);
1315 daemon_open_log_or_die();
1317 ret
= parse_stream_args();
1319 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1322 log_welcome("para_audiod");
1323 server_uptime(UPTIME_SET
);
1324 set_initial_status();
1327 setup_signal_handling();
1328 signal_setup_default(sig_task
);
1330 init_status_task(stat_task
);
1331 init_command_task(cmd_task
);
1333 if (conf
.daemon_given
)
1336 register_task(&sig_task
->task
);
1337 register_task(&cmd_task
->task
);
1338 register_task(&stat_task
->task
);
1339 s
.default_timeout
.tv_sec
= 2;
1340 s
.default_timeout
.tv_usec
= 999 * 1000;
1343 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1344 return EXIT_FAILURE
;