2 * Copyright (C) 2005-2010 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
;
147 * the task for handling audiod commands
149 * \sa struct task, struct sched
151 struct command_task
{
152 /** the local listening socket */
154 /** the associated task structure */
158 /** iterate over all supported audio formats */
159 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
162 * 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
;
182 * Compute the play time based on information of the given slot.
184 * \param slot_num The slot number (negative means: no slot).
186 * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
187 * from the status items received from para_server and the start time of the
188 * (first) writer of the given slot.
190 * It has to to take into account that probably the stream was not started at
191 * the beginning of the file, that the clock between the server and the client
192 * host may differ and that playback of the stream was delayed, e.g. because
193 * the prebuffer filter is used in the filter chain of the given slot.
195 * If no writer is active in the given slot, or \a slot_num is negative
196 * (indicating that para_audiod runs in standby mode), an approximation based
197 * only on the status items is computed and the returned string is prefixed
200 * \return A string that must be freed by the caller.
202 char *get_time_string(int slot_num
)
204 int ret
, seconds
= 0, length
;
205 struct timeval
*tmp
, sum
, sss
, /* server stream start */
206 rstime
, /* receiver start time */
207 wstime
, /* writer start time */
208 wtime
, /* now - writer start */
209 rskip
; /* receiver start - sss */
210 struct slot_info
*s
= slot_num
< 0? NULL
: &slot
[slot_num
];
213 if (audiod_status
== AUDIOD_OFF
)
215 if (!(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)) {
216 if (stat_task
->length_seconds
) /* paused */
218 goto empty
; /* stopped */
220 if (audiod_status
== AUDIOD_ON
&& !s
)
223 * Valid status items and playing, set length and tmp to the stream
224 * start. We use the slot info and fall back to the info from current
225 * status items if no slot info is available.
227 length
= stat_task
->length_seconds
;
228 tmp
= &stat_task
->server_stream_start
;
229 if (s
&& s
->wns
) { /* writer active in this slot */
230 btr_get_node_start(s
->wns
[0].btrn
, &wstime
);
231 if (wstime
.tv_sec
!= 0) { /* writer wrote something */
232 if (s
->server_stream_start
.tv_sec
== 0) {
233 /* copy status info to slot */
234 s
->server_stream_start
= stat_task
->server_stream_start
;
235 s
->offset_seconds
= stat_task
->offset_seconds
;
236 s
->seconds_total
= stat_task
->length_seconds
;
238 length
= s
->seconds_total
;
239 tmp
= &s
->server_stream_start
;
242 if (stat_task
->sa_time_diff_sign
> 0)
243 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
245 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
248 tv_diff(now
, &sss
, &diff
);
249 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
252 tv_diff(now
, &wstime
, &wtime
);
253 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
254 seconds
= s
->offset_seconds
;
255 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
256 ret
= tv_diff(&rstime
, &sss
, &rskip
);
257 if (ret
> 0) { /* audiod was started in the middle of the stream */
258 tv_add(&wtime
, &rskip
, &sum
);
259 seconds
+= sum
.tv_sec
;
261 seconds
+= wtime
.tv_sec
;
263 seconds
= PARA_MIN(seconds
, length
);
264 seconds
= PARA_MAX(seconds
, 0);
266 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
270 (length
- seconds
) / 60,
271 (length
- seconds
) % 60,
272 length
? (seconds
* 100 + length
/ 2) / length
: 0,
276 PARA_DEBUG_LOG("slot %d: %s\n", slot_num
, msg
);
279 return para_strdup(NULL
);
282 static int want_colors(void)
284 if (conf
.color_arg
== color_arg_no
)
286 if (conf
.color_arg
== color_arg_yes
)
288 if (conf
.logfile_given
)
290 return isatty(STDERR_FILENO
);
293 static void parse_config_or_die(void)
297 struct audiod_cmdline_parser_params params
= {
301 .check_ambiguity
= 0,
305 if (conf
.config_file_given
)
306 config_file
= para_strdup(conf
.config_file_arg
);
308 char *home
= para_homedir();
309 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
312 ret
= file_exists(config_file
);
313 if (conf
.config_file_given
&& !ret
) {
314 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
318 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
320 daemon_set_loglevel(conf
.loglevel_arg
);
327 static void setup_signal_handling(void)
329 sig_task
->fd
= para_signal_init();
330 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
331 para_install_sighandler(SIGINT
);
332 para_install_sighandler(SIGTERM
);
333 para_install_sighandler(SIGHUP
);
334 para_sigaction(SIGPIPE
, SIG_IGN
);
337 static void clear_slot(int slot_num
)
339 struct slot_info
*s
= &slot
[slot_num
];
341 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
342 memset(s
, 0, sizeof(struct slot_info
));
346 static void close_receiver(int slot_num
)
348 struct slot_info
*s
= &slot
[slot_num
];
349 struct audio_format_info
*a
;
351 if (s
->format
< 0 || !s
->receiver_node
)
354 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
355 audio_formats
[s
->format
], slot_num
);
356 a
->receiver
->close(s
->receiver_node
);
357 btr_free_node(s
->receiver_node
->btrn
);
358 free(s
->receiver_node
);
359 s
->receiver_node
= NULL
;
362 static void writer_cleanup(struct writer_node
*wn
)
368 w
= writers
+ wn
->writer_num
;
369 PARA_INFO_LOG("closing %s\n", writer_names
[wn
->writer_num
]);
371 btr_free_node(wn
->btrn
);
374 static void close_writers(struct slot_info
*s
)
376 struct audio_format_info
*a
;
383 if (a
->num_writers
== 0)
384 writer_cleanup(s
->wns
);
386 for (i
= 0; i
< a
->num_writers
; i
++)
387 writer_cleanup(s
->wns
+ i
);
393 static void close_filters(struct slot_info
*s
)
396 struct audio_format_info
*a
= afi
+ s
->format
;
397 if (a
->num_filters
== 0)
399 for (i
= 0; i
< a
->num_filters
; i
++) {
400 struct filter_node
*fn
= s
->fns
+ i
;
405 f
= filters
+ fn
->filter_num
;
408 btr_free_node(fn
->btrn
);
415 * Whenever a task commits suicide by returning from post_select with t->error
416 * < 0, it also removes its btr node. We do exactly that to kill a running
417 * task. Note that the scheduler checks t->error also _before_ each pre/post
418 * select call, so the victim will never be scheduled again.
420 static void kill_btrn(struct btr_node
*btrn
, struct task
*t
, int error
)
425 btr_remove_node(btrn
);
428 static void kill_all_decoders(int error
)
433 struct slot_info
*s
= &slot
[i
];
434 struct audio_format_info
*a
;
439 for (j
= 0; j
< a
->num_writers
; j
++)
440 kill_btrn(s
->wns
[j
].btrn
, &s
->wns
[j
].task
, error
);
442 for (j
= 0; j
< a
->num_writers
; j
++)
443 kill_btrn(s
->fns
[j
].btrn
, &s
->wns
[j
].task
, error
);
444 if (s
->receiver_node
)
445 kill_btrn(s
->receiver_node
->btrn
, &s
->receiver_node
->task
,
450 static int get_empty_slot(void)
461 if (s
->wns
|| s
->receiver_node
|| s
->fns
)
466 return -E_NO_MORE_SLOTS
;
470 * get the number of filters
472 * \param audio_format_num the number identifying the audio format
474 * \return the number of filters for the given audio format
478 int num_filters(int audio_format_num
)
480 return afi
[audio_format_num
].num_filters
;
483 static void open_filters(struct slot_info
*s
)
485 struct audio_format_info
*a
= afi
+ s
->format
;
486 struct filter_node
*fn
;
487 int nf
= a
->num_filters
;
488 struct btr_node
*parent
;
493 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
494 assert(s
->fns
== NULL
);
495 s
->fns
= para_calloc(nf
* sizeof(struct filter_node
));
496 parent
= s
->receiver_node
->btrn
;
497 for (i
= 0; i
< nf
; i
++) {
498 struct filter
*f
= filters
+ a
->filter_nums
[i
];
500 fn
->filter_num
= a
->filter_nums
[i
];
501 fn
->conf
= a
->filter_conf
[i
];
502 fn
->task
.pre_select
= f
->pre_select
;
503 fn
->task
.post_select
= f
->post_select
;
505 fn
->btrn
= btr_new_node(&(struct btr_node_description
)
506 EMBRACE(.name
= f
->name
, .parent
= parent
,
507 .handler
= f
->execute
, .context
= fn
));
510 register_task(&fn
->task
);
512 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
513 audio_formats
[s
->format
], i
, nf
, f
->name
, (int)(s
- slot
));
514 sprintf(fn
->task
.status
, "%s (slot %d)", f
->name
, (int)(s
- slot
));
518 static void open_writers(struct slot_info
*s
)
521 struct audio_format_info
*a
= afi
+ s
->format
;
522 struct writer_node
*wn
;
523 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
525 assert(s
->wns
== NULL
);
526 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
527 * sizeof(struct writer_node
));
528 if (a
->num_writers
== 0)
529 setup_writer_node(NULL
, parent
, s
->wns
);
531 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
532 for (i
= 0; i
< a
->num_writers
; i
++) {
534 wn
->conf
= a
->writer_conf
[i
];
535 wn
->writer_num
= a
->writer_nums
[i
];
536 register_writer_node(wn
, parent
);
541 /* returns slot num on success */
542 static int open_receiver(int format
)
544 struct audio_format_info
*a
= &afi
[format
];
547 struct receiver
*r
= a
->receiver
;
548 struct receiver_node
*rn
;
550 tv_add(now
, &(struct timeval
)EMBRACE(2, 0), &a
->restart_barrier
);
551 ret
= get_empty_slot();
555 rn
= para_calloc(sizeof(*rn
));
557 rn
->conf
= a
->receiver_conf
;
558 rn
->btrn
= btr_new_node(&(struct btr_node_description
)
559 EMBRACE(.name
= r
->name
, .context
= rn
));
562 btr_free_node(rn
->btrn
);
568 s
->receiver_node
= rn
;
569 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
570 audio_formats
[format
], r
->name
, slot_num
);
571 rn
->task
.pre_select
= r
->pre_select
;
572 rn
->task
.post_select
= r
->post_select
;
573 sprintf(rn
->task
.status
, "%s receiver node", r
->name
);
574 register_task(&rn
->task
);
578 static bool receiver_running(void)
581 long unsigned ss1
= stat_task
->server_stream_start
.tv_sec
;
584 struct slot_info
*s
= &slot
[i
];
585 long unsigned ss2
= s
->server_stream_start
.tv_sec
;
587 if (!s
->receiver_node
)
589 if (s
->receiver_node
->task
.error
>= 0)
598 * Return the root node of the current buffer tree.
600 * This is only used for stream grabbing.
602 * \return \p NULL if no slot is currently active. If more than one buffer tree
603 * exists, the node corresponding to the most recently started receiver is
606 struct btr_node
*audiod_get_btr_root(void)
608 int i
, newest_slot
= -1;
609 struct timeval newest_rstime
= {0, 0};
612 struct slot_info
*s
= &slot
[i
];
613 struct timeval rstime
;
614 if (!s
->receiver_node
)
616 if (s
->receiver_node
->task
.error
< 0)
618 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
619 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
621 newest_rstime
= rstime
;
624 if (newest_slot
== -1)
626 return slot
[newest_slot
].receiver_node
->btrn
;
629 /* whether a new instance of a decoder should be started. */
630 static bool must_start_decoder(void)
632 int cafn
= stat_task
->current_audio_format_num
;
633 unsigned vs
= stat_task
->vss_status
;
639 if (vs
& VSS_STATUS_FLAG_NEXT
)
641 if (!(vs
& VSS_STATUS_FLAG_PLAYING
))
643 if (receiver_running())
645 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, NULL
) < 0)
650 static unsigned compute_time_diff(const struct timeval
*status_time
)
652 struct timeval tmp
, diff
;
653 static unsigned count
;
654 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
655 const struct timeval max_deviation
= {0, 500 * 1000};
656 const int time_smooth
= 5;
660 sign
= tv_diff(status_time
, now
, &diff
);
661 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
662 // sign, sa_time_diff_sign);
664 sa_time_diff_sign
= sign
;
665 stat_task
->sa_time_diff
= diff
;
670 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
671 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
672 PARA_WARNING_LOG("time diff jump: %lims\n",
676 sa_time_diff_sign
= tv_convex_combination(
677 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
678 count
> 10? sign
: sign
* time_smooth
, &diff
,
680 stat_task
->sa_time_diff
= tmp
;
681 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
684 sa_time_diff_sign
< 0? "-" : "+",
685 tv2ms(&stat_task
->sa_time_diff
)
688 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
692 static int update_item(int itemnum
, char *buf
)
694 long unsigned sec
, usec
;
696 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
698 free(stat_item_values
[itemnum
]);
699 stat_item_values
[itemnum
] = para_strdup(buf
);
700 stat_client_write_item(itemnum
);
702 case SI_STATUS_FLAGS
:
703 stat_task
->vss_status
= 0;
704 if (strchr(buf
, 'N'))
705 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
706 if (strchr(buf
, 'P'))
707 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
710 stat_task
->offset_seconds
= atoi(buf
);
712 case SI_SECONDS_TOTAL
:
713 stat_task
->length_seconds
= atoi(buf
);
715 case SI_STREAM_START
:
716 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
717 stat_task
->server_stream_start
.tv_sec
= sec
;
718 stat_task
->server_stream_start
.tv_usec
= usec
;
721 case SI_CURRENT_TIME
:
722 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
723 struct timeval tv
= {sec
, usec
};
724 compute_time_diff(&tv
);
728 stat_task
->current_audio_format_num
729 = get_audio_format_num(buf
);
734 static int parse_stream_command(const char *txt
, char **cmd
)
736 char *p
= strchr(txt
, ':');
740 return -E_MISSING_COLON
;
742 FOR_EACH_AUDIO_FORMAT(i
) {
743 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
748 return -E_UNSUPPORTED_AUDIO_FORMAT
;
751 static int add_filter(int format
, char *cmdline
)
753 struct audio_format_info
*a
= &afi
[format
];
754 int filter_num
, nf
= a
->num_filters
;
756 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
759 a
->filter_nums
[nf
] = filter_num
;
761 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
762 filters
[filter_num
].name
);
766 static int parse_writer_args(void)
770 struct audio_format_info
*a
;
772 nw
= PARA_MAX(1U, conf
.writer_given
);
773 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
774 FOR_EACH_AUDIO_FORMAT(i
) {
776 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
777 a
->writer_nums
= para_malloc(nw
* sizeof(int));
780 for (i
= 0; i
< conf
.writer_given
; i
++) {
783 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
788 wconf
= check_writer_arg(cmd
, &writer_num
);
793 a
->writer_nums
[nw
] = writer_num
;
794 a
->writer_conf
[nw
] = wconf
;
795 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
796 nw
, writer_names
[writer_num
]);
804 static int parse_receiver_args(void)
806 int i
, ret
, receiver_num
;
808 struct audio_format_info
*a
;
810 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
811 char *arg
= conf
.receiver_arg
[i
];
812 char *recv_arg
= strchr(arg
, ':');
813 ret
= -E_MISSING_COLON
;
818 ret
= get_audio_format_num(arg
);
821 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
822 if (!afi
[ret
].receiver_conf
) {
823 ret
= -E_RECV_SYNTAX
;
826 afi
[ret
].receiver
= &receivers
[receiver_num
];
828 /* use the first available receiver with no arguments
829 * for those audio formats for which no receiver
832 cmd
= para_strdup(receivers
[0].name
);
833 FOR_EACH_AUDIO_FORMAT(i
) {
835 if (a
->receiver_conf
)
837 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
838 if (!a
->receiver_conf
)
839 return -E_RECV_SYNTAX
;
840 a
->receiver
= &receivers
[receiver_num
];
848 static int init_default_filters(void)
852 FOR_EACH_AUDIO_FORMAT(i
) {
853 struct audio_format_info
*a
= &afi
[i
];
858 continue; /* no default -- nothing to to */
860 * If udp is used to receive this audiod format, add fecdec as
863 if (strcmp(afi
[i
].receiver
->name
, "udp") == 0) {
864 tmp
= para_strdup("fecdec");
870 /* add "dec" to audio format name */
871 tmp
= make_message("%sdec", audio_formats
[i
]);
872 for (j
= 0; filters
[j
].name
; j
++)
873 if (!strcmp(tmp
, filters
[j
].name
))
876 ret
= -E_UNSUPPORTED_FILTER
;
877 if (!filters
[j
].name
)
879 tmp
= para_strdup(filters
[j
].name
);
880 ret
= add_filter(i
, tmp
);
884 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
891 static int parse_filter_args(void)
895 nf
= PARA_MAX(2U, conf
.filter_given
);
896 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
897 FOR_EACH_AUDIO_FORMAT(i
) {
898 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
899 afi
[i
].filter_nums
= para_malloc(nf
* sizeof(unsigned));
901 if (!conf
.no_default_filters_given
)
902 return init_default_filters();
903 for (i
= 0; i
< conf
.filter_given
; i
++) {
904 char *arg
= conf
.filter_arg
[i
];
905 char *filter_name
= strchr(arg
, ':');
906 ret
= -E_MISSING_COLON
;
911 ret
= get_audio_format_num(arg
);
914 ret
= add_filter(ret
, filter_name
);
918 ret
= init_default_filters(); /* use default values for the rest */
923 static int parse_stream_args(void)
927 ret
= parse_receiver_args();
930 ret
= parse_filter_args();
933 ret
= parse_writer_args();
939 /* does not unlink socket on errors */
940 static int audiod_get_socket(void)
942 struct sockaddr_un unix_addr
;
945 if (conf
.socket_given
)
946 socket_name
= para_strdup(conf
.socket_arg
);
948 char *hn
= para_hostname();
949 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
953 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
954 if (conf
.force_given
)
956 ret
= create_local_socket(socket_name
, &unix_addr
,
957 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
961 if (listen(fd
, 5) < 0) {
962 ret
= -ERRNO_TO_PARA_ERROR(errno
);
965 ret
= mark_fd_nonblocking(fd
);
970 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
974 static void signal_pre_select(struct sched
*s
, struct task
*t
)
976 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
977 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
980 static void signal_post_select(struct sched
*s
, struct task
*t
)
982 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
984 if (!FD_ISSET(st
->fd
, &s
->rfds
))
987 st
->signum
= para_next_signal();
988 switch (st
->signum
) {
992 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
993 clean_exit(EXIT_FAILURE
, "caught deadly signal");
997 static void signal_setup_default(struct signal_task
*st
)
999 st
->task
.pre_select
= signal_pre_select
;
1000 st
->task
.post_select
= signal_post_select
;
1001 sprintf(st
->task
.status
, "signal task");
1004 static void command_pre_select(struct sched
*s
, struct task
*t
)
1006 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1007 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1010 static void command_post_select(struct sched
*s
, struct task
*t
)
1013 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1014 static struct timeval last_status_dump
;
1015 struct timeval tmp
, delay
= {0, 500 * 1000};
1017 tv_add(&last_status_dump
, &delay
, &tmp
);
1018 if (tv_diff(&tmp
, now
, NULL
) < 0) {
1019 audiod_status_dump();
1020 last_status_dump
= *now
;
1023 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
1025 ret
= handle_connect(ct
->fd
);
1027 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1030 static void init_command_task(struct command_task
*ct
)
1032 ct
->task
.pre_select
= command_pre_select
;
1033 ct
->task
.post_select
= command_post_select
;
1035 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1036 sprintf(ct
->task
.status
, "command task");
1039 static void close_stat_pipe(void)
1043 btr_free_node(stat_task
->ct
->btrn
);
1044 client_close(stat_task
->ct
);
1045 stat_task
->ct
= NULL
;
1046 clear_and_dump_items();
1047 stat_task
->length_seconds
= 0;
1048 stat_task
->offset_seconds
= 0;
1049 stat_task
->vss_status
= 0;
1050 stat_task
->current_audio_format_num
= -1;
1051 audiod_status_dump();
1055 * close the connection to para_server and exit
1057 * \param status the exit status which is passed to exit(3)
1058 * \param msg the log message
1060 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1061 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1066 void __noreturn
clean_exit(int status
, const char *msg
)
1068 PARA_EMERG_LOG("%s\n", msg
);
1070 unlink(socket_name
);
1075 /* avoid busy loop if server is down */
1076 static void set_stat_task_restart_barrier(unsigned seconds
)
1078 struct timeval delay
= {seconds
, 0};
1079 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1082 static void try_to_close_slot(int slot_num
)
1084 struct slot_info
*s
= &slot
[slot_num
];
1085 struct audio_format_info
*a
= afi
+ s
->format
;
1090 if (s
->receiver_node
&& s
->receiver_node
->task
.error
!= -E_TASK_UNREGISTERED
)
1092 for (i
= 0; i
< a
->num_filters
; i
++)
1093 if (s
->fns
&& s
->fns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1095 if (a
->num_writers
> 0) {
1096 for (i
= 0; i
< a
->num_writers
; i
++)
1097 if (s
->wns
&& s
->wns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1100 if (s
->wns
&& s
->wns
[0].task
.error
!= -E_TASK_UNREGISTERED
)
1103 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1106 close_receiver(slot_num
);
1107 clear_slot(slot_num
);
1111 * Check if any receivers/filters/writers need to be started and do so if
1114 static void start_stop_decoders(void)
1117 struct slot_info
*sl
;
1118 struct audio_format_info
*a
;
1121 try_to_close_slot(i
);
1122 if (audiod_status
!= AUDIOD_ON
||
1123 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1124 return kill_all_decoders(-E_NOT_PLAYING
);
1125 if (!must_start_decoder())
1127 ret
= open_receiver(stat_task
->current_audio_format_num
);
1129 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1133 a
= afi
+ sl
->format
;
1137 activate_grab_clients();
1138 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1141 static void status_pre_select(struct sched
*s
, struct task
*t
)
1143 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1144 int ret
, cafn
= stat_task
->current_audio_format_num
;
1146 if (must_start_decoder())
1148 ret
= btr_node_status(st
->btrn
, 0, BTR_NT_LEAF
);
1152 sched_request_barrier_or_min_delay(&st
->restart_barrier
, s
);
1154 sched_request_barrier(&afi
[cafn
].restart_barrier
, s
);
1160 /* restart the client task if necessary */
1161 static void status_post_select(__a_unused
struct sched
*s
, struct task
*t
)
1163 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1165 if (audiod_status
== AUDIOD_OFF
) {
1168 if (st
->ct
->task
.error
>= 0) {
1169 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, -E_AUDIOD_OFF
);
1172 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1175 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1182 if (st
->ct
->task
.error
< 0) {
1183 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1188 if (st
->ct
->status
!= CL_RECEIVING
)
1190 ret
= btr_node_status(st
->btrn
, 0, BTR_NT_LEAF
);
1193 sz
= btr_next_buffer(st
->btrn
, &buf
);
1194 ret
= for_each_stat_item(buf
, sz
, update_item
);
1196 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, ret
);
1200 st
->last_status_read
= *now
;
1202 struct timeval diff
;
1203 tv_diff(now
, &st
->last_status_read
, &diff
);
1204 if (diff
.tv_sec
> 61)
1205 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
,
1208 btr_consume(st
->btrn
, sz
- ret
);
1211 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1213 if (st
->clock_diff_count
) { /* get status only one time */
1214 char *argv
[] = {"audiod", "--", "stat", "-p", "-n=1", NULL
};
1216 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1217 st
->clock_diff_count
--;
1218 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1219 set_stat_task_restart_barrier(2);
1222 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1224 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1225 set_stat_task_restart_barrier(5);
1227 free(stat_item_values
[SI_BASENAME
]);
1228 stat_item_values
[SI_BASENAME
] = para_strdup(
1229 "no connection to para_server");
1230 stat_client_write_item(SI_BASENAME
);
1231 st
->last_status_read
= *now
;
1233 start_stop_decoders();
1236 static void init_status_task(struct status_task
*st
)
1238 memset(st
, 0, sizeof(struct status_task
));
1239 st
->task
.pre_select
= status_pre_select
;
1240 st
->task
.post_select
= status_post_select
;
1241 st
->sa_time_diff_sign
= 1;
1242 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1243 st
->current_audio_format_num
= -1;
1244 sprintf(st
->task
.status
, "stat");
1245 st
->btrn
= btr_new_node(&(struct btr_node_description
)
1246 EMBRACE(.name
= "stat"));
1249 static void set_initial_status(void)
1251 audiod_status
= AUDIOD_ON
;
1252 if (!conf
.mode_given
)
1254 if (!strcmp(conf
.mode_arg
, "sb")) {
1255 audiod_status
= AUDIOD_STANDBY
;
1258 if (!strcmp(conf
.mode_arg
, "off")) {
1259 audiod_status
= AUDIOD_OFF
;
1262 if (strcmp(conf
.mode_arg
, "on"))
1263 PARA_WARNING_LOG("invalid mode\n");
1266 __noreturn
static void print_help_and_die(void)
1268 int d
= conf
.detailed_help_given
;
1269 const char **p
= d
? audiod_args_info_detailed_help
1270 : audiod_args_info_help
;
1272 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1273 AUDIOD_CMDLINE_PARSER_VERSION
);
1274 printf_or_die("%s\n\n", audiod_args_info_usage
);
1276 printf_or_die("%s\n", *p
);
1277 print_receiver_helps(d
);
1278 print_filter_helps(d
);
1279 print_writer_helps(d
);
1283 static void init_colors_or_die(void)
1289 daemon_set_default_log_colors();
1290 daemon_set_flag(DF_COLOR_LOG
);
1291 for (i
= 0; i
< conf
.log_color_given
; i
++) {
1292 ret
= daemon_set_log_color(conf
.log_color_arg
[i
]);
1299 * the main function of para_audiod
1301 * \param argc usual argument count
1302 * \param argv usual argument vector
1304 * \return EXIT_SUCCESS or EXIT_FAILURE
1306 * \sa para_audiod(1)
1308 int main(int argc
, char *argv
[])
1311 static struct sched s
;
1312 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1313 struct audiod_cmdline_parser_params params
= {
1316 .check_required
= 0,
1317 .check_ambiguity
= 0,
1322 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1324 HANDLE_VERSION_FLAG("audiod", conf
);
1325 /* init receivers/filters/writers early to make help work */
1329 if (conf
.help_given
|| conf
.detailed_help_given
)
1330 print_help_and_die();
1331 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1332 parse_config_or_die();
1333 init_colors_or_die();
1334 init_random_seed_or_die();
1335 daemon_set_flag(DF_LOG_TIME
);
1336 daemon_set_flag(DF_LOG_HOSTNAME
);
1337 daemon_set_flag(DF_LOG_LL
);
1338 if (conf
.log_timing_given
)
1339 daemon_set_flag(DF_LOG_TIMING
);
1340 if (conf
.logfile_given
) {
1341 daemon_set_logfile(conf
.logfile_arg
);
1342 daemon_open_log_or_die();
1344 ret
= parse_stream_args();
1346 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1349 log_welcome("para_audiod");
1350 server_uptime(UPTIME_SET
);
1351 set_initial_status();
1354 setup_signal_handling();
1355 signal_setup_default(sig_task
);
1357 init_status_task(stat_task
);
1358 init_command_task(cmd_task
);
1360 if (conf
.daemon_given
)
1363 register_task(&sig_task
->task
);
1364 register_task(&cmd_task
->task
);
1365 register_task(&stat_task
->task
);
1366 s
.default_timeout
.tv_sec
= 2;
1367 s
.default_timeout
.tv_usec
= 999 * 1000;
1370 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1371 return EXIT_FAILURE
;