2 * Copyright (C) 2005-2013 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. */
15 #include "audiod.cmdline.h"
19 #include "buffer_tree.h"
22 #include "grab_client.h"
23 #include "client.cmdline.h"
31 #include "write_common.h"
35 __printf_2_3
void (*para_log
)(int, const char*, ...) = daemon_log
;
36 /** define the array of error lists needed by para_audiod */
38 /** define the array containing all supported audio formats */
39 const char *audio_formats
[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL
};
41 DEFINE_RECEIVER_ARRAY
;
43 /** Defines how audiod handles one supported audio format. */
44 struct audio_format_info
{
45 /** pointer to the receiver for this audio format */
46 struct receiver
*receiver
;
47 /** the receiver configuration */
49 /** the number of filters that should be activated for this audio format */
50 unsigned int num_filters
;
51 /** Array of filter numbers to be activated. */
52 unsigned *filter_nums
;
53 /** Pointer to the array of filter configurations. */
55 /** the number of filters that should be activated for this audio format */
56 unsigned int num_writers
;
57 /** Array of writer numbers to be activated. */
59 /** pointer to the array of writer configurations */
61 /** do not start receiver/filters/writer before this time */
62 struct timeval restart_barrier
;
66 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
67 * be associated with a receiver/filter/writer triple. This array holds all
68 * information on the status of these slots.
70 * \sa struct slot_info
72 struct slot_info slot
[MAX_STREAM_SLOTS
];
74 /** The vss status flags audiod is interested in. */
75 enum vss_status_flags
{
76 /** Whether the 'N' flag is set. */
77 VSS_STATUS_FLAG_NEXT
= 1,
78 /** The 'P' flag is set. */
79 VSS_STATUS_FLAG_PLAYING
= 2,
83 * The scheduler instance of para_audiod.
85 * This is needed also in audiod_command.c (for the tasks command), so it can
88 struct sched sched
= {.max_fileno
= 0};
91 * The task for obtaining para_server's status (para_client stat).
93 * \sa struct task, struct sched.
96 /** The associated task structure of audiod. */
98 /** Client data associated with the stat task. */
99 struct client_task
*ct
;
100 /** Do not restart client command until this time. */
101 struct timeval restart_barrier
;
102 /** Last time we received status data from para_server. */
103 struct timeval last_status_read
;
105 /** The offset value announced by para_server. */
107 /** The length of the current audio file as announced by para_server. */
109 /** The start of the current stream from the view of para_server. */
110 struct timeval server_stream_start
;
111 /** The average time deviation between para_server and para_audiod. */
112 struct timeval sa_time_diff
;
113 /** Whether client time is ahead of server time. */
114 int sa_time_diff_sign
;
115 /** The 'P' and the 'N' flags as announced by para_server. */
116 enum vss_status_flags vss_status
;
117 /** Number of times the clock difference is to be checked. */
118 unsigned clock_diff_count
;
119 /** When to start the next check for clock difference. */
120 struct timeval clock_diff_barrier
;
121 /** Number of the audio format as announced by para_server. */
122 int current_audio_format_num
;
123 /* The status task btrn is the child of the client task. */
124 struct btr_node
*btrn
;
127 /** The array of status items sent by para_server. */
128 char *stat_item_values
[NUM_STAT_ITEMS
] = {NULL
};
131 * the current mode of operation of which can be changed by the on/off/cycle
132 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
134 int audiod_status
= AUDIOD_ON
;
137 * the gengetopt args_info struct that holds information on all command line
140 struct audiod_args_info conf
;
142 static char *socket_name
;
143 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
145 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
147 static struct status_task status_task_struct
;
150 * the task that calls the status command of para_server
152 * \sa struct status_task
154 static struct status_task
*stat_task
= &status_task_struct
;
157 * the task for handling audiod commands
159 * \sa struct task, struct sched
161 struct command_task
{
162 /** the local listening socket */
164 /** the associated task structure */
168 /** iterate over all supported audio formats */
169 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
172 * Get the audio format number.
174 * \param name The name of the audio format.
176 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
177 * \a name is not a supported audio format.
179 static int get_audio_format_num(const char *name
)
183 while (para_isspace(*name
))
185 FOR_EACH_AUDIO_FORMAT(i
)
186 if (!strcmp(name
, audio_formats
[i
]))
188 return -E_UNSUPPORTED_AUDIO_FORMAT
;
191 static int get_matching_audio_format_nums(const char *re
)
196 ret
= para_regcomp(&preg
, re
, REG_EXTENDED
| REG_NOSUB
);
200 FOR_EACH_AUDIO_FORMAT(i
)
201 if (regexec(&preg
, audio_formats
[i
], 0, NULL
, 0) != REG_NOMATCH
)
208 * Compute the play time based on information of the given slot.
210 * \param slot_num The slot number (negative means: no slot).
212 * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
213 * from the status items received from para_server and the start time of the
214 * (first) writer of the given slot.
216 * It has to to take into account that probably the stream was not started at
217 * the beginning of the file, that the clock between the server and the client
218 * host may differ and that playback of the stream was delayed, e.g. because
219 * the prebuffer filter is used in the filter configuration of the given slot.
221 * If no writer is active in the given slot, or \a slot_num is negative
222 * (indicating that para_audiod runs in standby mode), an approximation based
223 * only on the status items is computed and the returned string is prefixed
226 * \return A string that must be freed by the caller.
228 char *get_time_string(int slot_num
)
230 int ret
, seconds
= 0, length
;
231 struct timeval
*tmp
, sum
, sss
, /* server stream start */
232 rstime
, /* receiver start time */
233 wstime
, /* writer start time */
234 wtime
, /* now - writer start */
235 rskip
; /* receiver start - sss */
236 struct slot_info
*s
= slot_num
< 0? NULL
: &slot
[slot_num
];
239 if (audiod_status
== AUDIOD_OFF
)
241 if (!(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)) {
242 if (stat_task
->length_seconds
) /* paused */
244 goto empty
; /* stopped */
246 if (audiod_status
== AUDIOD_ON
&& !s
)
249 * Valid status items and playing, set length and tmp to the stream
250 * start. We use the slot info and fall back to the info from current
251 * status items if no slot info is available.
253 length
= stat_task
->length_seconds
;
254 tmp
= &stat_task
->server_stream_start
;
255 if (s
&& s
->wns
&& s
->wns
[0].btrn
) { /* writer active in this slot */
256 btr_get_node_start(s
->wns
[0].btrn
, &wstime
);
257 if (wstime
.tv_sec
!= 0) { /* writer wrote something */
258 if (s
->server_stream_start
.tv_sec
== 0) {
259 /* copy status info to slot */
260 s
->server_stream_start
= stat_task
->server_stream_start
;
261 s
->offset_seconds
= stat_task
->offset_seconds
;
262 s
->seconds_total
= stat_task
->length_seconds
;
264 length
= s
->seconds_total
;
265 tmp
= &s
->server_stream_start
;
268 if (stat_task
->sa_time_diff_sign
> 0)
269 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
271 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
272 if (!s
|| !s
->wns
|| !s
->wns
[0].btrn
) {
274 tv_diff(now
, &sss
, &diff
);
275 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
278 tv_diff(now
, &wstime
, &wtime
);
279 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
280 seconds
= s
->offset_seconds
;
281 if (s
->receiver_node
->btrn
) {
282 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
283 ret
= tv_diff(&rstime
, &sss
, &rskip
);
284 if (ret
> 0) { /* audiod was started in the middle of the stream */
285 tv_add(&wtime
, &rskip
, &sum
);
286 seconds
+= sum
.tv_sec
;
288 seconds
+= wtime
.tv_sec
;
290 seconds
+= wtime
.tv_sec
;
292 seconds
= PARA_MIN(seconds
, length
);
293 seconds
= PARA_MAX(seconds
, 0);
295 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
299 (length
- seconds
) / 60,
300 (length
- seconds
) % 60,
301 length
? (seconds
* 100 + length
/ 2) / length
: 0,
305 //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
308 return para_strdup(NULL
);
311 static int want_colors(void)
313 if (conf
.color_arg
== color_arg_no
)
315 if (conf
.color_arg
== color_arg_yes
)
317 if (conf
.logfile_given
)
319 return isatty(STDERR_FILENO
);
322 static void parse_config_or_die(void)
326 struct audiod_cmdline_parser_params params
= {
330 .check_ambiguity
= 0,
334 if (conf
.config_file_given
)
335 config_file
= para_strdup(conf
.config_file_arg
);
337 char *home
= para_homedir();
338 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
341 ret
= file_exists(config_file
);
342 if (conf
.config_file_given
&& !ret
) {
343 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
347 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
349 daemon_set_loglevel(conf
.loglevel_arg
);
356 static void setup_signal_handling(void)
358 sig_task
->fd
= para_signal_init();
359 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
360 para_install_sighandler(SIGINT
);
361 para_install_sighandler(SIGTERM
);
362 para_install_sighandler(SIGHUP
);
363 para_sigaction(SIGPIPE
, SIG_IGN
);
366 static void clear_slot(int slot_num
)
368 struct slot_info
*s
= &slot
[slot_num
];
370 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
371 memset(s
, 0, sizeof(struct slot_info
));
375 static void close_receiver(int slot_num
)
377 struct slot_info
*s
= &slot
[slot_num
];
378 struct audio_format_info
*a
;
380 if (s
->format
< 0 || !s
->receiver_node
)
383 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
384 audio_formats
[s
->format
], slot_num
);
385 a
->receiver
->close(s
->receiver_node
);
386 btr_remove_node(&s
->receiver_node
->btrn
);
387 free(s
->receiver_node
);
388 s
->receiver_node
= NULL
;
389 tv_add(now
, &(struct timeval
)EMBRACE(0, 200 * 1000),
390 &a
->restart_barrier
);
393 static void writer_cleanup(struct writer_node
*wn
)
399 w
= writers
+ wn
->writer_num
;
400 PARA_INFO_LOG("closing %s\n", writer_names
[wn
->writer_num
]);
402 btr_remove_node(&wn
->btrn
);
405 static void close_writers(struct slot_info
*s
)
407 struct audio_format_info
*a
;
414 if (a
->num_writers
== 0)
415 writer_cleanup(s
->wns
);
417 for (i
= 0; i
< a
->num_writers
; i
++)
418 writer_cleanup(s
->wns
+ i
);
424 static void close_filters(struct slot_info
*s
)
427 struct audio_format_info
*a
= afi
+ s
->format
;
428 if (a
->num_filters
== 0)
430 for (i
= 0; i
< a
->num_filters
; i
++) {
431 struct filter_node
*fn
= s
->fns
+ i
;
436 f
= filters
+ fn
->filter_num
;
439 btr_remove_node(&fn
->btrn
);
445 static void notify_receivers(int error
)
450 struct slot_info
*s
= slot
+ i
;
453 if (!s
->receiver_node
)
455 task_notify(&s
->receiver_node
->task
, error
);
459 static int get_empty_slot(void)
470 if (s
->wns
|| s
->receiver_node
|| s
->fns
)
475 return -E_NO_MORE_SLOTS
;
478 static void open_filters(struct slot_info
*s
)
480 struct audio_format_info
*a
= afi
+ s
->format
;
481 struct filter_node
*fn
;
482 int nf
= a
->num_filters
;
483 struct btr_node
*parent
;
488 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
489 assert(s
->fns
== NULL
);
490 s
->fns
= para_calloc(nf
* sizeof(struct filter_node
));
491 parent
= s
->receiver_node
->btrn
;
492 for (i
= 0; i
< nf
; i
++) {
493 struct filter
*f
= filters
+ a
->filter_nums
[i
];
495 fn
->filter_num
= a
->filter_nums
[i
];
496 fn
->conf
= a
->filter_conf
[i
];
497 fn
->task
.pre_select
= f
->pre_select
;
498 fn
->task
.post_select
= f
->post_select
;
500 fn
->btrn
= btr_new_node(&(struct btr_node_description
)
501 EMBRACE(.name
= f
->name
, .parent
= parent
,
502 .handler
= f
->execute
, .context
= fn
));
505 register_task(&sched
, &fn
->task
);
507 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
508 audio_formats
[s
->format
], i
, nf
, f
->name
, (int)(s
- slot
));
509 sprintf(fn
->task
.status
, "%s (slot %d)", f
->name
, (int)(s
- slot
));
513 static void open_writers(struct slot_info
*s
)
516 struct audio_format_info
*a
= afi
+ s
->format
;
517 struct writer_node
*wn
;
518 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
520 assert(s
->wns
== NULL
);
521 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
522 * sizeof(struct writer_node
));
523 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
524 for (i
= 0; i
< a
->num_writers
; i
++) {
526 wn
->conf
= a
->writer_conf
[i
];
527 wn
->writer_num
= a
->writer_nums
[i
];
528 register_writer_node(wn
, parent
, &sched
);
532 /* returns slot num on success */
533 static int open_receiver(int format
)
535 struct audio_format_info
*a
= &afi
[format
];
538 struct receiver
*r
= a
->receiver
;
539 struct receiver_node
*rn
;
541 tv_add(now
, &(struct timeval
)EMBRACE(2, 0), &a
->restart_barrier
);
542 ret
= get_empty_slot();
546 rn
= para_calloc(sizeof(*rn
));
548 rn
->conf
= a
->receiver_conf
;
549 rn
->btrn
= btr_new_node(&(struct btr_node_description
)
550 EMBRACE(.name
= r
->name
, .context
= rn
));
553 btr_remove_node(&rn
->btrn
);
559 s
->receiver_node
= rn
;
560 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
561 audio_formats
[format
], r
->name
, slot_num
);
562 rn
->task
.pre_select
= r
->pre_select
;
563 rn
->task
.post_select
= r
->post_select
;
564 sprintf(rn
->task
.status
, "%s receiver node", r
->name
);
565 register_task(&sched
, &rn
->task
);
569 static bool receiver_running(void)
572 long unsigned ss1
= stat_task
->server_stream_start
.tv_sec
;
575 struct slot_info
*s
= &slot
[i
];
576 long unsigned ss2
= s
->server_stream_start
.tv_sec
;
578 if (!s
->receiver_node
)
580 if (s
->receiver_node
->task
.error
>= 0)
589 * Return the root node of the current buffer tree.
591 * This is only used for stream grabbing.
593 * \return \p NULL if no slot is currently active. If more than one buffer tree
594 * exists, the node corresponding to the most recently started receiver is
597 struct btr_node
*audiod_get_btr_root(void)
599 int i
, newest_slot
= -1;
600 struct timeval newest_rstime
= {0, 0};
603 struct slot_info
*s
= &slot
[i
];
604 struct timeval rstime
;
605 if (!s
->receiver_node
)
607 if (s
->receiver_node
->task
.error
< 0)
609 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
610 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
612 newest_rstime
= rstime
;
615 if (newest_slot
== -1)
617 return slot
[newest_slot
].receiver_node
->btrn
;
620 /* whether a new instance of a decoder should be started. */
621 static bool must_start_decoder(void)
623 int cafn
= stat_task
->current_audio_format_num
;
624 unsigned vs
= stat_task
->vss_status
;
626 if (audiod_status
!= AUDIOD_ON
)
632 if (vs
& VSS_STATUS_FLAG_NEXT
)
634 if (!(vs
& VSS_STATUS_FLAG_PLAYING
))
636 if (receiver_running())
638 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, NULL
) < 0)
643 static unsigned compute_time_diff(const struct timeval
*status_time
)
645 struct timeval tmp
, diff
;
646 static unsigned count
;
647 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
648 const struct timeval max_deviation
= {0, 500 * 1000};
649 const int time_smooth
= 5;
653 sign
= tv_diff(status_time
, now
, &diff
);
654 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
655 // sign, sa_time_diff_sign);
657 sa_time_diff_sign
= sign
;
658 stat_task
->sa_time_diff
= diff
;
663 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
664 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
665 PARA_WARNING_LOG("time diff jump: %lims\n",
669 sa_time_diff_sign
= tv_convex_combination(
670 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
671 count
> 10? sign
: sign
* time_smooth
, &diff
,
673 stat_task
->sa_time_diff
= tmp
;
674 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
677 sa_time_diff_sign
< 0? "-" : "+",
678 tv2ms(&stat_task
->sa_time_diff
)
681 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
685 static int update_item(int itemnum
, char *buf
)
687 long unsigned sec
, usec
;
689 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
691 free(stat_item_values
[itemnum
]);
692 stat_item_values
[itemnum
] = para_strdup(buf
);
693 stat_client_write_item(itemnum
);
695 case SI_STATUS_FLAGS
:
696 stat_task
->vss_status
= 0;
697 if (strchr(buf
, 'N'))
698 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
699 if (strchr(buf
, 'P'))
700 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
703 stat_task
->offset_seconds
= atoi(buf
);
705 case SI_SECONDS_TOTAL
:
706 stat_task
->length_seconds
= atoi(buf
);
708 case SI_STREAM_START
:
709 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
710 stat_task
->server_stream_start
.tv_sec
= sec
;
711 stat_task
->server_stream_start
.tv_usec
= usec
;
714 case SI_CURRENT_TIME
:
715 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
716 struct timeval tv
= {sec
, usec
};
717 compute_time_diff(&tv
);
721 stat_task
->current_audio_format_num
722 = get_audio_format_num(buf
);
727 static int parse_stream_command(const char *txt
, char **cmd
)
730 char *re
, *p
= strchr(txt
, ':');
733 return -E_MISSING_COLON
;
736 re
= malloc(len
+ 1);
737 strncpy(re
, txt
, len
);
739 ret
= get_matching_audio_format_nums(re
);
744 static int add_filter(int format
, char *cmdline
)
746 struct audio_format_info
*a
= &afi
[format
];
747 int filter_num
, nf
= a
->num_filters
;
750 filter_num
= check_filter_arg(cmdline
, &cfg
);
753 a
->filter_conf
= para_realloc(a
->filter_conf
,
754 (nf
+ 1) * sizeof(void *));
755 a
->filter_nums
= para_realloc(a
->filter_nums
,
756 (nf
+ 1) * sizeof(unsigned));
757 a
->filter_nums
[nf
] = filter_num
;
758 a
->filter_conf
[nf
] = cfg
;
760 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
761 filters
[filter_num
].name
);
765 static int parse_writer_args(void)
769 struct audio_format_info
*a
;
771 for (i
= 0; i
< conf
.writer_given
; i
++) {
773 int j
, nw
, writer_num
, af_mask
;
775 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
779 FOR_EACH_AUDIO_FORMAT(j
) {
781 if ((af_mask
& (1 << j
)) == 0) /* no match */
783 wconf
= check_writer_arg_or_die(cmd
, &writer_num
);
785 a
->writer_nums
= para_realloc(a
->writer_nums
, (nw
+ 1) * sizeof(int));
786 a
->writer_conf
= para_realloc(a
->writer_conf
, (nw
+ 1) * sizeof(void *));
787 a
->writer_nums
[nw
] = writer_num
;
788 a
->writer_conf
[nw
] = wconf
;
789 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[j
],
790 nw
, writer_names
[writer_num
]);
794 /* Use default writer for audio formats which are not yet set up. */
795 FOR_EACH_AUDIO_FORMAT(i
) {
799 if (a
->num_writers
> 0)
800 continue; /* already set up */
801 writer_conf
= check_writer_arg_or_die(NULL
, &writer_num
);
802 a
->writer_nums
= para_malloc(sizeof(int));
803 a
->writer_nums
[0] = writer_num
;
804 a
->writer_conf
= para_malloc(sizeof(void *));
805 a
->writer_conf
[0] = writer_conf
;
807 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats
[i
],
808 writer_names
[writer_num
]);
813 static int parse_receiver_args(void)
815 int i
, ret
, receiver_num
;
817 struct audio_format_info
*a
;
819 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
823 ret
= parse_stream_command(conf
.receiver_arg
[i
], &arg
);
827 FOR_EACH_AUDIO_FORMAT(j
) {
829 if ((af_mask
& (1 << j
)) == 0) /* no match */
832 * If multiple receivers are given for this audio format, the
833 * last one wins and we have to free the previous receiver
834 * config here. Since we are iterating backwards, the winning
835 * receiver arg is in fact the first one given.
837 if (a
->receiver_conf
)
838 a
->receiver
->free_config(a
->receiver_conf
);
839 a
->receiver_conf
= check_receiver_arg(arg
, &receiver_num
);
840 ret
= -E_RECV_SYNTAX
;
841 if (!a
->receiver_conf
)
843 a
->receiver
= receivers
+ receiver_num
;
847 * Use the first available receiver with no arguments for those audio
848 * formats for which no receiver was specified.
850 cmd
= para_strdup(receivers
[0].name
);
851 FOR_EACH_AUDIO_FORMAT(i
) {
853 if (a
->receiver_conf
)
855 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
856 if (!a
->receiver_conf
)
857 return -E_RECV_SYNTAX
;
858 a
->receiver
= &receivers
[receiver_num
];
860 FOR_EACH_AUDIO_FORMAT(i
) {
862 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
863 audio_formats
[i
], a
->receiver
->name
);
871 static int init_default_filters(void)
875 FOR_EACH_AUDIO_FORMAT(i
) {
876 struct audio_format_info
*a
= &afi
[i
];
881 continue; /* no default -- nothing to to */
883 * udp and dccp streams are fec-encoded, so add fecdec as the
886 if (strcmp(afi
[i
].receiver
->name
, "udp") == 0 ||
887 strcmp(afi
[i
].receiver
->name
, "dccp") == 0) {
888 tmp
= para_strdup("fecdec");
894 /* add "dec" to audio format name */
895 tmp
= make_message("%sdec", audio_formats
[i
]);
896 for (j
= 0; filters
[j
].name
; j
++)
897 if (!strcmp(tmp
, filters
[j
].name
))
900 ret
= -E_UNSUPPORTED_FILTER
;
901 if (!filters
[j
].name
)
903 tmp
= para_strdup(filters
[j
].name
);
904 ret
= add_filter(i
, tmp
);
908 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
915 static int parse_filter_args(void)
917 int i
, j
, ret
, af_mask
;
919 for (i
= 0; i
< conf
.filter_given
; i
++) {
921 ret
= parse_stream_command(conf
.filter_arg
[i
], &arg
);
925 FOR_EACH_AUDIO_FORMAT(j
) {
926 if ((af_mask
& (1 << j
)) == 0) /* no match */
928 ret
= add_filter(j
, arg
);
933 ret
= init_default_filters(); /* use default values for the rest */
938 static int parse_stream_args(void)
942 ret
= parse_receiver_args();
945 ret
= parse_filter_args();
948 ret
= parse_writer_args();
954 /* does not unlink socket on errors */
955 static int audiod_get_socket(void)
957 struct sockaddr_un unix_addr
;
960 if (conf
.socket_given
)
961 socket_name
= para_strdup(conf
.socket_arg
);
963 char *hn
= para_hostname();
964 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
968 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
969 if (conf
.force_given
)
971 ret
= create_local_socket(socket_name
, &unix_addr
,
972 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
976 if (listen(fd
, 5) < 0) {
977 ret
= -ERRNO_TO_PARA_ERROR(errno
);
980 ret
= mark_fd_nonblocking(fd
);
985 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
989 static void signal_pre_select(struct sched
*s
, struct task
*t
)
991 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
992 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
995 static void signal_post_select(struct sched
*s
, __a_unused
struct task
*t
)
999 signum
= para_next_signal(&s
->rfds
);
1004 PARA_EMERG_LOG("terminating on signal %d\n", signum
);
1005 clean_exit(EXIT_FAILURE
, "caught deadly signal");
1009 static void signal_setup_default(struct signal_task
*st
)
1011 st
->task
.pre_select
= signal_pre_select
;
1012 st
->task
.post_select
= signal_post_select
;
1013 sprintf(st
->task
.status
, "signal task");
1016 static void command_pre_select(struct sched
*s
, struct task
*t
)
1018 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1019 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1022 static void command_post_select(struct sched
*s
, struct task
*t
)
1025 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1026 static struct timeval last_status_dump
;
1027 struct timeval tmp
, delay
= {0, 500 * 1000};
1029 tv_add(&last_status_dump
, &delay
, &tmp
);
1030 if (tv_diff(&tmp
, now
, NULL
) < 0) {
1031 audiod_status_dump();
1032 last_status_dump
= *now
;
1035 ret
= handle_connect(ct
->fd
, &s
->rfds
);
1037 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1038 audiod_status_dump();
1041 static void init_command_task(struct command_task
*ct
)
1043 ct
->task
.pre_select
= command_pre_select
;
1044 ct
->task
.post_select
= command_post_select
;
1046 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1047 sprintf(ct
->task
.status
, "command task");
1050 static void close_stat_pipe(void)
1054 client_close(stat_task
->ct
);
1055 stat_task
->ct
= NULL
;
1056 clear_and_dump_items();
1057 stat_task
->length_seconds
= 0;
1058 stat_task
->offset_seconds
= 0;
1059 stat_task
->vss_status
= 0;
1060 stat_task
->current_audio_format_num
= -1;
1061 audiod_status_dump();
1065 * close the connection to para_server and exit
1067 * \param status the exit status which is passed to exit(3)
1068 * \param msg the log message
1070 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1071 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1076 void __noreturn
clean_exit(int status
, const char *msg
)
1078 PARA_EMERG_LOG("%s\n", msg
);
1080 unlink(socket_name
);
1085 /* avoid busy loop if server is down */
1086 static void set_stat_task_restart_barrier(unsigned seconds
)
1088 struct timeval delay
= {seconds
, 0};
1089 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1092 static void try_to_close_slot(int slot_num
)
1094 struct slot_info
*s
= &slot
[slot_num
];
1095 struct audio_format_info
*a
= afi
+ s
->format
;
1100 if (s
->receiver_node
&& s
->receiver_node
->task
.error
>= 0)
1102 for (i
= 0; i
< a
->num_filters
; i
++)
1103 if (s
->fns
&& s
->fns
[i
].task
.error
>= 0)
1105 if (a
->num_writers
> 0) {
1106 for (i
= 0; i
< a
->num_writers
; i
++)
1107 if (s
->wns
&& s
->wns
[i
].task
.error
>= 0)
1110 if (s
->wns
&& s
->wns
[0].task
.error
>= 0)
1113 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1116 close_receiver(slot_num
);
1117 clear_slot(slot_num
);
1121 * Check if any receivers/filters/writers need to be started and do so if
1124 static void start_stop_decoders(void)
1127 struct slot_info
*sl
;
1128 struct audio_format_info
*a
;
1131 try_to_close_slot(i
);
1132 if (audiod_status
!= AUDIOD_ON
||
1133 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1134 return notify_receivers(E_NOT_PLAYING
);
1135 if (!must_start_decoder())
1137 ret
= open_receiver(stat_task
->current_audio_format_num
);
1139 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1143 a
= afi
+ sl
->format
;
1147 activate_grab_clients(&sched
);
1148 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1151 static void status_pre_select(struct sched
*s
, struct task
*t
)
1153 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1154 int ret
, cafn
= stat_task
->current_audio_format_num
;
1156 if (must_start_decoder())
1158 ret
= btr_node_status(st
->btrn
, st
->min_iqs
, BTR_NT_LEAF
);
1161 if (st
->ct
&& audiod_status
== AUDIOD_OFF
)
1163 if (!st
->ct
&& audiod_status
!= AUDIOD_OFF
)
1164 sched_request_barrier_or_min_delay(&st
->restart_barrier
, s
);
1166 sched_request_barrier(&afi
[cafn
].restart_barrier
, s
);
1168 * If para_server is playing we'd like to have a smooth time display
1169 * even if we are running in standby mode. So we request a timeout that
1170 * expires at the next full second.
1172 if (stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)
1173 sched_request_timeout_ms(1000 - now
->tv_usec
/ 1000, s
);
1179 /* restart the client task if necessary */
1180 static void status_post_select(struct sched
*s
, struct task
*t
)
1182 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1184 if (audiod_status
== AUDIOD_OFF
) {
1187 if (st
->ct
->task
.error
>= 0) {
1188 task_notify(&st
->ct
->task
, E_AUDIOD_OFF
);
1192 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1199 if (st
->ct
->task
.error
< 0) {
1203 if (st
->ct
->status
!= CL_RECEIVING
)
1205 ret
= btr_node_status(st
->btrn
, st
->min_iqs
, BTR_NT_LEAF
);
1207 struct timeval diff
;
1208 tv_diff(now
, &st
->last_status_read
, &diff
);
1209 if (diff
.tv_sec
> 61)
1210 task_notify(&st
->ct
->task
, E_AUDIOD_OFF
);
1213 btr_merge(st
->btrn
, st
->min_iqs
);
1214 sz
= btr_next_buffer(st
->btrn
, &buf
);
1215 ret
= for_each_stat_item(buf
, sz
, update_item
);
1217 task_notify(&st
->ct
->task
, E_AUDIOD_OFF
);
1221 btr_consume(st
->btrn
, sz
- ret
);
1222 st
->last_status_read
= *now
;
1224 } else /* current status item crosses buffers */
1225 st
->min_iqs
= sz
+ 1;
1228 btr_drain(st
->btrn
);
1229 st
->current_audio_format_num
= -1;
1230 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1232 if (st
->clock_diff_count
) { /* get status only one time */
1233 char *argv
[] = {"audiod", "--", "stat", "-p", "-n=1", NULL
};
1235 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1236 st
->clock_diff_count
--;
1237 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
, s
);
1238 set_stat_task_restart_barrier(2);
1241 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1243 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
, s
);
1244 set_stat_task_restart_barrier(5);
1246 free(stat_item_values
[SI_BASENAME
]);
1247 stat_item_values
[SI_BASENAME
] = para_strdup(
1248 "no connection to para_server");
1249 stat_client_write_item(SI_BASENAME
);
1250 st
->last_status_read
= *now
;
1252 start_stop_decoders();
1255 static void init_status_task(struct status_task
*st
)
1257 memset(st
, 0, sizeof(struct status_task
));
1258 st
->task
.pre_select
= status_pre_select
;
1259 st
->task
.post_select
= status_post_select
;
1260 st
->sa_time_diff_sign
= 1;
1261 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1262 st
->current_audio_format_num
= -1;
1263 sprintf(st
->task
.status
, "stat");
1264 st
->btrn
= btr_new_node(&(struct btr_node_description
)
1265 EMBRACE(.name
= "stat"));
1268 static void set_initial_status(void)
1270 audiod_status
= AUDIOD_ON
;
1271 if (!conf
.mode_given
)
1273 if (!strcmp(conf
.mode_arg
, "sb")) {
1274 audiod_status
= AUDIOD_STANDBY
;
1277 if (!strcmp(conf
.mode_arg
, "off")) {
1278 audiod_status
= AUDIOD_OFF
;
1281 if (strcmp(conf
.mode_arg
, "on"))
1282 PARA_WARNING_LOG("invalid mode\n");
1285 __noreturn
static void print_help_and_die(void)
1287 int d
= conf
.detailed_help_given
;
1288 const char **p
= d
? audiod_args_info_detailed_help
1289 : audiod_args_info_help
;
1291 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1292 AUDIOD_CMDLINE_PARSER_VERSION
);
1293 printf_or_die("%s\n\n", audiod_args_info_usage
);
1295 printf_or_die("%s\n", *p
);
1296 print_receiver_helps(d
);
1297 print_filter_helps(d
);
1298 print_writer_helps(d
);
1302 static void init_colors_or_die(void)
1308 daemon_set_default_log_colors();
1309 daemon_set_flag(DF_COLOR_LOG
);
1310 for (i
= 0; i
< conf
.log_color_given
; i
++)
1311 daemon_set_log_color_or_die(conf
.log_color_arg
[i
]);
1315 * the main function of para_audiod
1317 * \param argc usual argument count
1318 * \param argv usual argument vector
1320 * \return EXIT_SUCCESS or EXIT_FAILURE
1322 * \sa para_audiod(1)
1324 int main(int argc
, char *argv
[])
1327 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1328 struct audiod_cmdline_parser_params params
= {
1331 .check_required
= 0,
1332 .check_ambiguity
= 0,
1337 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1339 HANDLE_VERSION_FLAG("audiod", conf
);
1340 /* init receivers/filters/writers early to make help work */
1344 if (conf
.help_given
|| conf
.detailed_help_given
)
1345 print_help_and_die();
1346 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1347 parse_config_or_die();
1348 init_colors_or_die();
1349 init_random_seed_or_die();
1350 daemon_set_flag(DF_LOG_TIME
);
1351 daemon_set_flag(DF_LOG_HOSTNAME
);
1352 daemon_set_flag(DF_LOG_LL
);
1353 if (conf
.log_timing_given
)
1354 daemon_set_flag(DF_LOG_TIMING
);
1355 if (conf
.logfile_given
) {
1356 daemon_set_logfile(conf
.logfile_arg
);
1357 daemon_open_log_or_die();
1359 ret
= parse_stream_args();
1361 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1364 log_welcome("para_audiod");
1365 set_server_start_time(NULL
);
1366 set_initial_status();
1369 setup_signal_handling();
1370 signal_setup_default(sig_task
);
1372 init_status_task(stat_task
);
1373 init_command_task(cmd_task
);
1375 if (conf
.daemon_given
)
1376 daemonize(false /* parent exits immediately */);
1378 register_task(&sched
, &sig_task
->task
);
1379 register_task(&sched
, &cmd_task
->task
);
1380 register_task(&sched
, &stat_task
->task
);
1381 sched
.default_timeout
.tv_sec
= 2;
1382 sched
.default_timeout
.tv_usec
= 999 * 1000;
1383 ret
= schedule(&sched
);
1385 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1386 return EXIT_FAILURE
;