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
;
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
;
350 struct timeval restart_delay
= {0, 200 * 1000};
352 if (s
->format
< 0 || !s
->receiver_node
)
355 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
356 audio_formats
[s
->format
], slot_num
);
357 a
->receiver
->close(s
->receiver_node
);
358 btr_free_node(s
->receiver_node
->btrn
);
359 free(s
->receiver_node
);
360 s
->receiver_node
= NULL
;
361 tv_add(now
, &restart_delay
, &afi
[s
->format
].restart_barrier
);
364 static void writer_cleanup(struct writer_node
*wn
)
370 w
= writers
+ wn
->writer_num
;
371 PARA_INFO_LOG("closing %s\n", writer_names
[wn
->writer_num
]);
373 btr_free_node(wn
->btrn
);
376 static void close_writers(struct slot_info
*s
)
378 struct audio_format_info
*a
;
385 if (a
->num_writers
== 0)
386 writer_cleanup(s
->wns
);
388 for (i
= 0; i
< a
->num_writers
; i
++)
389 writer_cleanup(s
->wns
+ i
);
395 static void close_filters(struct slot_info
*s
)
398 struct audio_format_info
*a
= afi
+ s
->format
;
399 if (a
->num_filters
== 0)
401 for (i
= 0; i
< a
->num_filters
; i
++) {
402 struct filter_node
*fn
= s
->fns
+ i
;
407 f
= filters
+ fn
->filter_num
;
410 btr_free_node(fn
->btrn
);
417 * Whenever a task commits suicide by returning from post_select with t->error
418 * < 0, it also removes its btr node. We do exactly that to kill a running
419 * task. Note that the scheduler checks t->error also _before_ each pre/post
420 * select call, so the victim will never be scheduled again.
422 static void kill_btrn(struct btr_node
*btrn
, struct task
*t
, int error
)
427 btr_remove_node(btrn
);
430 static void kill_all_decoders(int error
)
435 struct slot_info
*s
= &slot
[i
];
436 struct audio_format_info
*a
;
441 for (j
= 0; j
< a
->num_writers
; j
++)
442 kill_btrn(s
->wns
[j
].btrn
, &s
->wns
[j
].task
, error
);
444 for (j
= 0; j
< a
->num_writers
; j
++)
445 kill_btrn(s
->fns
[j
].btrn
, &s
->wns
[j
].task
, error
);
446 if (s
->receiver_node
)
447 kill_btrn(s
->receiver_node
->btrn
, &s
->receiver_node
->task
,
452 static int get_empty_slot(void)
463 if (s
->wns
|| s
->receiver_node
|| s
->fns
)
468 return -E_NO_MORE_SLOTS
;
472 * get the number of filters
474 * \param audio_format_num the number identifying the audio format
476 * \return the number of filters for the given audio format
480 int num_filters(int audio_format_num
)
482 return afi
[audio_format_num
].num_filters
;
485 static void open_filters(struct slot_info
*s
)
487 struct audio_format_info
*a
= afi
+ s
->format
;
488 struct filter_node
*fn
;
489 int nf
= a
->num_filters
;
490 struct btr_node
*parent
;
495 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
496 assert(s
->fns
== NULL
);
497 s
->fns
= para_calloc(nf
* sizeof(struct filter_node
));
498 parent
= s
->receiver_node
->btrn
;
499 for (i
= 0; i
< nf
; i
++) {
500 struct filter
*f
= filters
+ a
->filter_nums
[i
];
502 fn
->filter_num
= a
->filter_nums
[i
];
503 fn
->conf
= a
->filter_conf
[i
];
504 fn
->task
.pre_select
= f
->pre_select
;
505 fn
->task
.post_select
= f
->post_select
;
507 fn
->btrn
= btr_new_node(&(struct btr_node_description
)
508 EMBRACE(.name
= f
->name
, .parent
= parent
,
509 .handler
= f
->execute
, .context
= fn
));
512 register_task(&fn
->task
);
514 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
515 audio_formats
[s
->format
], i
, nf
, f
->name
, (int)(s
- slot
));
516 sprintf(fn
->task
.status
, "%s (slot %d)", f
->name
, (int)(s
- slot
));
520 static void open_writers(struct slot_info
*s
)
523 struct audio_format_info
*a
= afi
+ s
->format
;
524 struct writer_node
*wn
;
525 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
527 assert(s
->wns
== NULL
);
528 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
529 * sizeof(struct writer_node
));
530 if (a
->num_writers
== 0)
531 setup_writer_node(NULL
, parent
, s
->wns
);
533 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
534 for (i
= 0; i
< a
->num_writers
; i
++) {
536 wn
->conf
= a
->writer_conf
[i
];
537 wn
->writer_num
= a
->writer_nums
[i
];
538 register_writer_node(wn
, parent
);
543 /* returns slot num on success */
544 static int open_receiver(int format
)
546 struct audio_format_info
*a
= &afi
[format
];
549 struct receiver
*r
= a
->receiver
;
550 struct receiver_node
*rn
;
552 tv_add(now
, &(struct timeval
)EMBRACE(2, 0), &a
->restart_barrier
);
553 ret
= get_empty_slot();
557 rn
= para_calloc(sizeof(*rn
));
559 rn
->conf
= a
->receiver_conf
;
560 rn
->btrn
= btr_new_node(&(struct btr_node_description
)
561 EMBRACE(.name
= r
->name
, .context
= rn
));
564 btr_free_node(rn
->btrn
);
570 s
->receiver_node
= rn
;
571 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
572 audio_formats
[format
], r
->name
, slot_num
);
573 rn
->task
.pre_select
= r
->pre_select
;
574 rn
->task
.post_select
= r
->post_select
;
575 sprintf(rn
->task
.status
, "%s receiver node", r
->name
);
576 register_task(&rn
->task
);
580 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
581 static int receiver_running(int format
)
586 struct slot_info
*s
= &slot
[i
];
587 if (s
->format
!= format
)
589 if (!s
->receiver_node
)
591 if (s
->receiver_node
->task
.error
>= 0)
599 * Return the root node of the current buffer tree.
601 * This is only used for stream grabbing.
603 * \return \p NULL if no slot is currently active. If more than one buffer tree
604 * exists, the node corresponding to the most recently started receiver is
607 struct btr_node
*audiod_get_btr_root(void)
609 int i
, newest_slot
= -1;
610 struct timeval newest_rstime
= {0, 0};
613 struct slot_info
*s
= &slot
[i
];
614 struct timeval rstime
;
615 if (!s
->receiver_node
)
617 if (s
->receiver_node
->task
.error
< 0)
619 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
620 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
622 newest_rstime
= rstime
;
625 if (newest_slot
== -1)
627 return slot
[newest_slot
].receiver_node
->btrn
;
630 /* whether a new instance of a decoder should be started. */
631 static bool must_start_decoder(void)
633 int ret
, cafn
= stat_task
->current_audio_format_num
;
635 if (cafn
< 0 || !stat_task
->ct
)
637 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
638 if (stat_task
->vss_status
!= VSS_STATUS_FLAG_PLAYING
)
640 ret
= receiver_running(cafn
);
641 if (ret
!= 0) /* already running */
643 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, NULL
) < 0)
648 static unsigned compute_time_diff(const struct timeval
*status_time
)
650 struct timeval tmp
, diff
;
651 static unsigned count
;
652 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
653 const struct timeval max_deviation
= {0, 500 * 1000};
654 const int time_smooth
= 5;
658 sign
= tv_diff(status_time
, now
, &diff
);
659 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
660 // sign, sa_time_diff_sign);
662 sa_time_diff_sign
= sign
;
663 stat_task
->sa_time_diff
= diff
;
668 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
669 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
670 PARA_WARNING_LOG("time diff jump: %lims\n",
674 sa_time_diff_sign
= tv_convex_combination(
675 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
676 count
> 10? sign
: sign
* time_smooth
, &diff
,
678 stat_task
->sa_time_diff
= tmp
;
679 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
682 sa_time_diff_sign
< 0? "-" : "+",
683 tv2ms(&stat_task
->sa_time_diff
)
686 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
690 static int update_item(int itemnum
, char *buf
)
692 long unsigned sec
, usec
;
694 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
696 free(stat_item_values
[itemnum
]);
697 stat_item_values
[itemnum
] = para_strdup(buf
);
698 stat_client_write_item(itemnum
);
700 case SI_STATUS_FLAGS
:
701 stat_task
->vss_status
= 0;
702 if (strchr(buf
, 'N'))
703 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
704 if (strchr(buf
, 'P'))
705 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
708 stat_task
->offset_seconds
= atoi(buf
);
710 case SI_SECONDS_TOTAL
:
711 stat_task
->length_seconds
= atoi(buf
);
713 case SI_STREAM_START
:
714 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
715 stat_task
->server_stream_start
.tv_sec
= sec
;
716 stat_task
->server_stream_start
.tv_usec
= usec
;
719 case SI_CURRENT_TIME
:
720 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
721 struct timeval tv
= {sec
, usec
};
722 compute_time_diff(&tv
);
726 stat_task
->current_audio_format_num
727 = get_audio_format_num(buf
);
732 static int parse_stream_command(const char *txt
, char **cmd
)
734 char *p
= strchr(txt
, ':');
738 return -E_MISSING_COLON
;
740 FOR_EACH_AUDIO_FORMAT(i
) {
741 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
746 return -E_UNSUPPORTED_AUDIO_FORMAT
;
749 static int add_filter(int format
, char *cmdline
)
751 struct audio_format_info
*a
= &afi
[format
];
752 int filter_num
, nf
= a
->num_filters
;
754 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
757 a
->filter_nums
[nf
] = filter_num
;
759 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
760 filters
[filter_num
].name
);
764 static int parse_writer_args(void)
768 struct audio_format_info
*a
;
770 nw
= PARA_MAX(1U, conf
.writer_given
);
771 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
772 FOR_EACH_AUDIO_FORMAT(i
) {
774 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
775 a
->writer_nums
= para_malloc(nw
* sizeof(int));
778 for (i
= 0; i
< conf
.writer_given
; i
++) {
781 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
786 wconf
= check_writer_arg(cmd
, &writer_num
);
791 a
->writer_nums
[nw
] = writer_num
;
792 a
->writer_conf
[nw
] = wconf
;
793 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
794 nw
, writer_names
[writer_num
]);
802 static int parse_receiver_args(void)
804 int i
, ret
, receiver_num
;
806 struct audio_format_info
*a
;
808 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
809 char *arg
= conf
.receiver_arg
[i
];
810 char *recv_arg
= strchr(arg
, ':');
811 ret
= -E_MISSING_COLON
;
816 ret
= get_audio_format_num(arg
);
819 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
820 if (!afi
[ret
].receiver_conf
) {
821 ret
= -E_RECV_SYNTAX
;
824 afi
[ret
].receiver
= &receivers
[receiver_num
];
826 /* use the first available receiver with no arguments
827 * for those audio formats for which no receiver
830 cmd
= para_strdup(receivers
[0].name
);
831 FOR_EACH_AUDIO_FORMAT(i
) {
833 if (a
->receiver_conf
)
835 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
836 if (!a
->receiver_conf
)
837 return -E_RECV_SYNTAX
;
838 a
->receiver
= &receivers
[receiver_num
];
846 static int init_default_filters(void)
850 FOR_EACH_AUDIO_FORMAT(i
) {
851 struct audio_format_info
*a
= &afi
[i
];
856 continue; /* no default -- nothing to to */
858 * If udp is used to receive this audiod format, add fecdec as
861 if (strcmp(afi
[i
].receiver
->name
, "udp") == 0) {
862 tmp
= para_strdup("fecdec");
868 /* add "dec" to audio format name */
869 tmp
= make_message("%sdec", audio_formats
[i
]);
870 for (j
= 0; filters
[j
].name
; j
++)
871 if (!strcmp(tmp
, filters
[j
].name
))
874 ret
= -E_UNSUPPORTED_FILTER
;
875 if (!filters
[j
].name
)
877 tmp
= para_strdup(filters
[j
].name
);
878 ret
= add_filter(i
, tmp
);
882 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
889 static int parse_filter_args(void)
893 nf
= PARA_MAX(2U, conf
.filter_given
);
894 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
895 FOR_EACH_AUDIO_FORMAT(i
) {
896 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
897 afi
[i
].filter_nums
= para_malloc(nf
* sizeof(unsigned));
899 if (!conf
.no_default_filters_given
)
900 return init_default_filters();
901 for (i
= 0; i
< conf
.filter_given
; i
++) {
902 char *arg
= conf
.filter_arg
[i
];
903 char *filter_name
= strchr(arg
, ':');
904 ret
= -E_MISSING_COLON
;
909 ret
= get_audio_format_num(arg
);
912 ret
= add_filter(ret
, filter_name
);
916 ret
= init_default_filters(); /* use default values for the rest */
921 static int parse_stream_args(void)
925 ret
= parse_receiver_args();
928 ret
= parse_filter_args();
931 ret
= parse_writer_args();
937 /* does not unlink socket on errors */
938 static int audiod_get_socket(void)
940 struct sockaddr_un unix_addr
;
943 if (conf
.socket_given
)
944 socket_name
= para_strdup(conf
.socket_arg
);
946 char *hn
= para_hostname();
947 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
951 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
952 if (conf
.force_given
)
954 ret
= create_local_socket(socket_name
, &unix_addr
,
955 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
959 if (listen(fd
, 5) < 0) {
960 ret
= -ERRNO_TO_PARA_ERROR(errno
);
963 ret
= mark_fd_nonblocking(fd
);
968 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
972 static void signal_pre_select(struct sched
*s
, struct task
*t
)
974 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
975 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
978 static void signal_post_select(struct sched
*s
, struct task
*t
)
980 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
982 if (!FD_ISSET(st
->fd
, &s
->rfds
))
985 st
->signum
= para_next_signal();
986 switch (st
->signum
) {
990 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
991 clean_exit(EXIT_FAILURE
, "caught deadly signal");
995 static void signal_setup_default(struct signal_task
*st
)
997 st
->task
.pre_select
= signal_pre_select
;
998 st
->task
.post_select
= signal_post_select
;
999 sprintf(st
->task
.status
, "signal task");
1002 static void command_pre_select(struct sched
*s
, struct task
*t
)
1004 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1005 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1008 static void command_post_select(struct sched
*s
, struct task
*t
)
1011 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1012 static struct timeval last_status_dump
;
1013 struct timeval tmp
, delay
= {0, 500 * 1000};
1015 tv_add(&last_status_dump
, &delay
, &tmp
);
1016 if (tv_diff(&tmp
, now
, NULL
) < 0) {
1017 audiod_status_dump();
1018 last_status_dump
= *now
;
1021 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
1023 ret
= handle_connect(ct
->fd
);
1025 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1028 static void init_command_task(struct command_task
*ct
)
1030 ct
->task
.pre_select
= command_pre_select
;
1031 ct
->task
.post_select
= command_post_select
;
1033 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1034 sprintf(ct
->task
.status
, "command task");
1037 static void close_stat_pipe(void)
1041 btr_free_node(stat_task
->ct
->btrn
);
1042 client_close(stat_task
->ct
);
1043 stat_task
->ct
= NULL
;
1044 clear_and_dump_items();
1045 stat_task
->length_seconds
= 0;
1046 stat_task
->offset_seconds
= 0;
1047 stat_task
->vss_status
= 0;
1048 stat_task
->current_audio_format_num
= -1;
1049 audiod_status_dump();
1053 * close the connection to para_server and exit
1055 * \param status the exit status which is passed to exit(3)
1056 * \param msg the log message
1058 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1059 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1064 void __noreturn
clean_exit(int status
, const char *msg
)
1066 PARA_EMERG_LOG("%s\n", msg
);
1068 unlink(socket_name
);
1073 /* avoid busy loop if server is down */
1074 static void set_stat_task_restart_barrier(unsigned seconds
)
1076 struct timeval delay
= {seconds
, 0};
1077 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1080 static void try_to_close_slot(int slot_num
)
1082 struct slot_info
*s
= &slot
[slot_num
];
1083 struct audio_format_info
*a
= afi
+ s
->format
;
1088 if (s
->receiver_node
&& s
->receiver_node
->task
.error
!= -E_TASK_UNREGISTERED
)
1090 for (i
= 0; i
< a
->num_filters
; i
++)
1091 if (s
->fns
&& s
->fns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1093 if (a
->num_writers
> 0) {
1094 for (i
= 0; i
< a
->num_writers
; i
++)
1095 if (s
->wns
&& s
->wns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1098 if (s
->wns
&& s
->wns
[0].task
.error
!= -E_TASK_UNREGISTERED
)
1101 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1104 close_receiver(slot_num
);
1105 clear_slot(slot_num
);
1109 * Check if any receivers/filters/writers need to be started and do so if
1112 static void start_stop_decoders(void)
1115 struct slot_info
*sl
;
1116 struct audio_format_info
*a
;
1119 try_to_close_slot(i
);
1120 if (audiod_status
!= AUDIOD_ON
||
1121 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1122 return kill_all_decoders(-E_NOT_PLAYING
);
1123 if (!must_start_decoder())
1125 ret
= open_receiver(stat_task
->current_audio_format_num
);
1127 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1131 a
= afi
+ sl
->format
;
1135 activate_grab_clients();
1136 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1139 static void status_pre_select(struct sched
*s
, struct task
*t
)
1141 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1142 int ret
, cafn
= stat_task
->current_audio_format_num
;
1144 if (must_start_decoder())
1146 ret
= btr_node_status(st
->btrn
, 0, BTR_NT_LEAF
);
1150 sched_request_barrier_or_min_delay(&st
->restart_barrier
, s
);
1152 sched_request_barrier(&afi
[cafn
].restart_barrier
, s
);
1158 /* restart the client task if necessary */
1159 static void status_post_select(__a_unused
struct sched
*s
, struct task
*t
)
1161 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1163 if (audiod_status
== AUDIOD_OFF
) {
1166 if (st
->ct
->task
.error
>= 0) {
1167 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, -E_AUDIOD_OFF
);
1170 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1173 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1180 if (st
->ct
->task
.error
< 0) {
1181 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1186 if (st
->ct
->status
!= CL_RECEIVING
)
1188 ret
= btr_node_status(st
->btrn
, 0, BTR_NT_LEAF
);
1191 sz
= btr_next_buffer(st
->btrn
, &buf
);
1192 ret
= for_each_stat_item(buf
, sz
, update_item
);
1194 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, ret
);
1198 st
->last_status_read
= *now
;
1200 struct timeval diff
;
1201 tv_diff(now
, &st
->last_status_read
, &diff
);
1202 if (diff
.tv_sec
> 61)
1203 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
,
1206 btr_consume(st
->btrn
, sz
- ret
);
1209 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1211 if (st
->clock_diff_count
) { /* get status only one time */
1212 char *argv
[] = {"audiod", "--", "stat", "-p", "-n=1", NULL
};
1214 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1215 st
->clock_diff_count
--;
1216 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1217 set_stat_task_restart_barrier(2);
1220 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1222 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1223 set_stat_task_restart_barrier(5);
1225 free(stat_item_values
[SI_BASENAME
]);
1226 stat_item_values
[SI_BASENAME
] = para_strdup(
1227 "no connection to para_server");
1228 stat_client_write_item(SI_BASENAME
);
1229 st
->last_status_read
= *now
;
1231 start_stop_decoders();
1234 static void init_status_task(struct status_task
*st
)
1236 memset(st
, 0, sizeof(struct status_task
));
1237 st
->task
.pre_select
= status_pre_select
;
1238 st
->task
.post_select
= status_post_select
;
1239 st
->sa_time_diff_sign
= 1;
1240 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1241 st
->current_audio_format_num
= -1;
1242 sprintf(st
->task
.status
, "stat");
1243 st
->btrn
= btr_new_node(&(struct btr_node_description
)
1244 EMBRACE(.name
= "stat"));
1247 static void set_initial_status(void)
1249 audiod_status
= AUDIOD_ON
;
1250 if (!conf
.mode_given
)
1252 if (!strcmp(conf
.mode_arg
, "sb")) {
1253 audiod_status
= AUDIOD_STANDBY
;
1256 if (!strcmp(conf
.mode_arg
, "off")) {
1257 audiod_status
= AUDIOD_OFF
;
1260 if (strcmp(conf
.mode_arg
, "on"))
1261 PARA_WARNING_LOG("invalid mode\n");
1264 __noreturn
static void print_help_and_die(void)
1266 int d
= conf
.detailed_help_given
;
1267 const char **p
= d
? audiod_args_info_detailed_help
1268 : audiod_args_info_help
;
1270 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1271 AUDIOD_CMDLINE_PARSER_VERSION
);
1272 printf_or_die("%s\n\n", audiod_args_info_usage
);
1274 printf_or_die("%s\n", *p
);
1275 print_receiver_helps(d
);
1276 print_filter_helps(d
);
1277 print_writer_helps(d
);
1281 static void init_colors_or_die(void)
1287 daemon_set_default_log_colors();
1288 daemon_set_flag(DF_COLOR_LOG
);
1289 for (i
= 0; i
< conf
.log_color_given
; i
++) {
1290 ret
= daemon_set_log_color(conf
.log_color_arg
[i
]);
1297 * the main function of para_audiod
1299 * \param argc usual argument count
1300 * \param argv usual argument vector
1302 * \return EXIT_SUCCESS or EXIT_FAILURE
1304 * \sa para_audiod(1)
1306 int main(int argc
, char *argv
[])
1309 static struct sched s
;
1310 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1311 struct audiod_cmdline_parser_params params
= {
1314 .check_required
= 0,
1315 .check_ambiguity
= 0,
1320 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1322 HANDLE_VERSION_FLAG("audiod", conf
);
1323 /* init receivers/filters/writers early to make help work */
1327 if (conf
.help_given
|| conf
.detailed_help_given
)
1328 print_help_and_die();
1329 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1330 parse_config_or_die();
1331 init_colors_or_die();
1332 init_random_seed_or_die();
1333 daemon_set_flag(DF_LOG_TIME
);
1334 daemon_set_flag(DF_LOG_HOSTNAME
);
1335 daemon_set_flag(DF_LOG_LL
);
1336 if (conf
.log_timing_given
)
1337 daemon_set_flag(DF_LOG_TIMING
);
1338 if (conf
.logfile_given
) {
1339 daemon_set_logfile(conf
.logfile_arg
);
1340 daemon_open_log_or_die();
1342 ret
= parse_stream_args();
1344 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1347 log_welcome("para_audiod");
1348 server_uptime(UPTIME_SET
);
1349 set_initial_status();
1352 setup_signal_handling();
1353 signal_setup_default(sig_task
);
1355 init_status_task(stat_task
);
1356 init_command_task(cmd_task
);
1358 if (conf
.daemon_given
)
1361 register_task(&sig_task
->task
);
1362 register_task(&cmd_task
->task
);
1363 register_task(&stat_task
->task
);
1364 s
.default_timeout
.tv_sec
= 2;
1365 s
.default_timeout
.tv_usec
= 999 * 1000;
1368 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1369 return EXIT_FAILURE
;