2 * Copyright (C) 2005-2011 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 */
16 #include "audiod.cmdline.h"
21 #include "buffer_tree.h"
23 #include "grab_client.h"
24 #include "client.cmdline.h"
32 #include "write_common.h"
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 /** Defines how audiod handles one supported audio format. */
42 struct audio_format_info
{
43 /** pointer to the receiver for this audio format */
44 struct receiver
*receiver
;
45 /** the receiver configuration */
47 /** the number of filters that should be activated for this audio format */
48 unsigned int num_filters
;
49 /** Array of filter numbers to be activated. */
50 unsigned *filter_nums
;
51 /** Pointer to the array of filter configurations. */
53 /** the number of filters that should be activated for this audio format */
54 unsigned int num_writers
;
55 /** Array of writer numbers to be activated. */
57 /** pointer to the array of writer configurations */
59 /** do not start receiver/filters/writer before this time */
60 struct timeval restart_barrier
;
64 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
65 * be associated with a receiver/filter/writer triple. This array holds all
66 * information on the status of these slots.
68 * \sa struct slot_info
70 struct slot_info slot
[MAX_STREAM_SLOTS
];
72 /** The vss status flags audiod is interested in. */
73 enum vss_status_flags
{
74 /** Whether the 'N' flag is set. */
75 VSS_STATUS_FLAG_NEXT
= 1,
76 /** The 'P' flag is set. */
77 VSS_STATUS_FLAG_PLAYING
= 2,
81 * The task for obtaining para_server's status (para_client stat).
83 * \sa struct task, struct sched.
86 /** The associated task structure of audiod. */
88 /** Client data associated with the stat task. */
89 struct client_task
*ct
;
90 /** Do not restart client command until this time. */
91 struct timeval restart_barrier
;
92 /** Last time we received status data from para_server. */
93 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 static 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 configuration 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
;
360 tv_add(now
, &(struct timeval
)EMBRACE(0, 200 * 1000),
361 &a
->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
;
438 if (!s
->receiver_node
)
440 kill_btrn(s
->receiver_node
->btrn
, &s
->receiver_node
->task
,
445 static int get_empty_slot(void)
456 if (s
->wns
|| s
->receiver_node
|| s
->fns
)
461 return -E_NO_MORE_SLOTS
;
464 static void open_filters(struct slot_info
*s
)
466 struct audio_format_info
*a
= afi
+ s
->format
;
467 struct filter_node
*fn
;
468 int nf
= a
->num_filters
;
469 struct btr_node
*parent
;
474 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
475 assert(s
->fns
== NULL
);
476 s
->fns
= para_calloc(nf
* sizeof(struct filter_node
));
477 parent
= s
->receiver_node
->btrn
;
478 for (i
= 0; i
< nf
; i
++) {
479 struct filter
*f
= filters
+ a
->filter_nums
[i
];
481 fn
->filter_num
= a
->filter_nums
[i
];
482 fn
->conf
= a
->filter_conf
[i
];
483 fn
->task
.pre_select
= f
->pre_select
;
484 fn
->task
.post_select
= f
->post_select
;
486 fn
->btrn
= btr_new_node(&(struct btr_node_description
)
487 EMBRACE(.name
= f
->name
, .parent
= parent
,
488 .handler
= f
->execute
, .context
= fn
));
491 register_task(&fn
->task
);
493 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
494 audio_formats
[s
->format
], i
, nf
, f
->name
, (int)(s
- slot
));
495 sprintf(fn
->task
.status
, "%s (slot %d)", f
->name
, (int)(s
- slot
));
499 static void open_writers(struct slot_info
*s
)
502 struct audio_format_info
*a
= afi
+ s
->format
;
503 struct writer_node
*wn
;
504 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
506 assert(s
->wns
== NULL
);
507 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
508 * sizeof(struct writer_node
));
509 if (a
->num_writers
== 0)
510 setup_writer_node(NULL
, parent
, s
->wns
);
512 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
513 for (i
= 0; i
< a
->num_writers
; i
++) {
515 wn
->conf
= a
->writer_conf
[i
];
516 wn
->writer_num
= a
->writer_nums
[i
];
517 register_writer_node(wn
, parent
);
522 /* returns slot num on success */
523 static int open_receiver(int format
)
525 struct audio_format_info
*a
= &afi
[format
];
528 struct receiver
*r
= a
->receiver
;
529 struct receiver_node
*rn
;
531 tv_add(now
, &(struct timeval
)EMBRACE(2, 0), &a
->restart_barrier
);
532 ret
= get_empty_slot();
536 rn
= para_calloc(sizeof(*rn
));
538 rn
->conf
= a
->receiver_conf
;
539 rn
->btrn
= btr_new_node(&(struct btr_node_description
)
540 EMBRACE(.name
= r
->name
, .context
= rn
));
543 btr_free_node(rn
->btrn
);
549 s
->receiver_node
= rn
;
550 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
551 audio_formats
[format
], r
->name
, slot_num
);
552 rn
->task
.pre_select
= r
->pre_select
;
553 rn
->task
.post_select
= r
->post_select
;
554 sprintf(rn
->task
.status
, "%s receiver node", r
->name
);
555 register_task(&rn
->task
);
559 static bool receiver_running(void)
562 long unsigned ss1
= stat_task
->server_stream_start
.tv_sec
;
565 struct slot_info
*s
= &slot
[i
];
566 long unsigned ss2
= s
->server_stream_start
.tv_sec
;
568 if (!s
->receiver_node
)
570 if (s
->receiver_node
->task
.error
>= 0)
579 * Return the root node of the current buffer tree.
581 * This is only used for stream grabbing.
583 * \return \p NULL if no slot is currently active. If more than one buffer tree
584 * exists, the node corresponding to the most recently started receiver is
587 struct btr_node
*audiod_get_btr_root(void)
589 int i
, newest_slot
= -1;
590 struct timeval newest_rstime
= {0, 0};
593 struct slot_info
*s
= &slot
[i
];
594 struct timeval rstime
;
595 if (!s
->receiver_node
)
597 if (s
->receiver_node
->task
.error
< 0)
599 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
600 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
602 newest_rstime
= rstime
;
605 if (newest_slot
== -1)
607 return slot
[newest_slot
].receiver_node
->btrn
;
610 /* whether a new instance of a decoder should be started. */
611 static bool must_start_decoder(void)
613 int cafn
= stat_task
->current_audio_format_num
;
614 unsigned vs
= stat_task
->vss_status
;
616 if (audiod_status
!= AUDIOD_ON
)
622 if (vs
& VSS_STATUS_FLAG_NEXT
)
624 if (!(vs
& VSS_STATUS_FLAG_PLAYING
))
626 if (receiver_running())
628 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, NULL
) < 0)
633 static unsigned compute_time_diff(const struct timeval
*status_time
)
635 struct timeval tmp
, diff
;
636 static unsigned count
;
637 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
638 const struct timeval max_deviation
= {0, 500 * 1000};
639 const int time_smooth
= 5;
643 sign
= tv_diff(status_time
, now
, &diff
);
644 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
645 // sign, sa_time_diff_sign);
647 sa_time_diff_sign
= sign
;
648 stat_task
->sa_time_diff
= diff
;
653 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
654 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
655 PARA_WARNING_LOG("time diff jump: %lims\n",
659 sa_time_diff_sign
= tv_convex_combination(
660 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
661 count
> 10? sign
: sign
* time_smooth
, &diff
,
663 stat_task
->sa_time_diff
= tmp
;
664 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
667 sa_time_diff_sign
< 0? "-" : "+",
668 tv2ms(&stat_task
->sa_time_diff
)
671 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
675 static int update_item(int itemnum
, char *buf
)
677 long unsigned sec
, usec
;
679 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
681 free(stat_item_values
[itemnum
]);
682 stat_item_values
[itemnum
] = para_strdup(buf
);
683 stat_client_write_item(itemnum
);
685 case SI_STATUS_FLAGS
:
686 stat_task
->vss_status
= 0;
687 if (strchr(buf
, 'N'))
688 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
689 if (strchr(buf
, 'P'))
690 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
693 stat_task
->offset_seconds
= atoi(buf
);
695 case SI_SECONDS_TOTAL
:
696 stat_task
->length_seconds
= atoi(buf
);
698 case SI_STREAM_START
:
699 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
700 stat_task
->server_stream_start
.tv_sec
= sec
;
701 stat_task
->server_stream_start
.tv_usec
= usec
;
704 case SI_CURRENT_TIME
:
705 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
706 struct timeval tv
= {sec
, usec
};
707 compute_time_diff(&tv
);
711 stat_task
->current_audio_format_num
712 = get_audio_format_num(buf
);
717 static int parse_stream_command(const char *txt
, char **cmd
)
719 char *p
= strchr(txt
, ':');
723 return -E_MISSING_COLON
;
725 FOR_EACH_AUDIO_FORMAT(i
) {
726 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
731 return -E_UNSUPPORTED_AUDIO_FORMAT
;
734 static int add_filter(int format
, char *cmdline
)
736 struct audio_format_info
*a
= &afi
[format
];
737 int filter_num
, nf
= a
->num_filters
;
739 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
742 a
->filter_nums
[nf
] = filter_num
;
744 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
745 filters
[filter_num
].name
);
749 static int parse_writer_args(void)
753 struct audio_format_info
*a
;
755 nw
= PARA_MAX(1U, conf
.writer_given
);
756 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
757 FOR_EACH_AUDIO_FORMAT(i
) {
759 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
760 a
->writer_nums
= para_malloc(nw
* sizeof(int));
763 for (i
= 0; i
< conf
.writer_given
; i
++) {
766 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
771 wconf
= check_writer_arg(cmd
, &writer_num
);
776 a
->writer_nums
[nw
] = writer_num
;
777 a
->writer_conf
[nw
] = wconf
;
778 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
779 nw
, writer_names
[writer_num
]);
787 static int parse_receiver_args(void)
789 int i
, ret
, receiver_num
;
791 struct audio_format_info
*a
;
793 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
794 char *arg
= conf
.receiver_arg
[i
];
795 char *recv_arg
= strchr(arg
, ':');
796 ret
= -E_MISSING_COLON
;
801 ret
= get_audio_format_num(arg
);
805 * If multiple receivers are given for this audio format, the
806 * last one wins and we have to free the previous receiver
807 * config here. Since we are iterating backwards, the winning
808 * receiver arg is in fact the first one given.
810 if (afi
[ret
].receiver_conf
)
811 afi
[ret
].receiver
->free_config(afi
[ret
].receiver_conf
);
812 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
813 if (!afi
[ret
].receiver_conf
) {
814 ret
= -E_RECV_SYNTAX
;
817 afi
[ret
].receiver
= &receivers
[receiver_num
];
820 * Use the first available receiver with no arguments for those audio
821 * formats for which no receiver was specified.
823 cmd
= para_strdup(receivers
[0].name
);
824 FOR_EACH_AUDIO_FORMAT(i
) {
826 if (a
->receiver_conf
)
828 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
829 if (!a
->receiver_conf
)
830 return -E_RECV_SYNTAX
;
831 a
->receiver
= &receivers
[receiver_num
];
839 static int init_default_filters(void)
843 FOR_EACH_AUDIO_FORMAT(i
) {
844 struct audio_format_info
*a
= &afi
[i
];
849 continue; /* no default -- nothing to to */
851 * If udp is used to receive this audiod format, add fecdec as
854 if (strcmp(afi
[i
].receiver
->name
, "udp") == 0 ||
855 strcmp(afi
[i
].receiver
->name
, "dccp") == 0) {
856 tmp
= para_strdup("fecdec");
862 /* add "dec" to audio format name */
863 tmp
= make_message("%sdec", audio_formats
[i
]);
864 for (j
= 0; filters
[j
].name
; j
++)
865 if (!strcmp(tmp
, filters
[j
].name
))
868 ret
= -E_UNSUPPORTED_FILTER
;
869 if (!filters
[j
].name
)
871 tmp
= para_strdup(filters
[j
].name
);
872 ret
= add_filter(i
, tmp
);
876 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
883 static int parse_filter_args(void)
887 nf
= PARA_MAX(2U, conf
.filter_given
);
888 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
889 FOR_EACH_AUDIO_FORMAT(i
) {
890 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
891 afi
[i
].filter_nums
= para_malloc(nf
* sizeof(unsigned));
893 if (!conf
.no_default_filters_given
)
894 return init_default_filters();
895 for (i
= 0; i
< conf
.filter_given
; i
++) {
896 char *arg
= conf
.filter_arg
[i
];
897 char *filter_name
= strchr(arg
, ':');
898 ret
= -E_MISSING_COLON
;
903 ret
= get_audio_format_num(arg
);
906 ret
= add_filter(ret
, filter_name
);
910 ret
= init_default_filters(); /* use default values for the rest */
915 static int parse_stream_args(void)
919 ret
= parse_receiver_args();
922 ret
= parse_filter_args();
925 ret
= parse_writer_args();
931 /* does not unlink socket on errors */
932 static int audiod_get_socket(void)
934 struct sockaddr_un unix_addr
;
937 if (conf
.socket_given
)
938 socket_name
= para_strdup(conf
.socket_arg
);
940 char *hn
= para_hostname();
941 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
945 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
946 if (conf
.force_given
)
948 ret
= create_local_socket(socket_name
, &unix_addr
,
949 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
953 if (listen(fd
, 5) < 0) {
954 ret
= -ERRNO_TO_PARA_ERROR(errno
);
957 ret
= mark_fd_nonblocking(fd
);
962 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
966 static void signal_pre_select(struct sched
*s
, struct task
*t
)
968 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
969 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
972 static void signal_post_select(struct sched
*s
, __a_unused
struct task
*t
)
976 signum
= para_next_signal(&s
->rfds
);
981 PARA_EMERG_LOG("terminating on signal %d\n", signum
);
982 clean_exit(EXIT_FAILURE
, "caught deadly signal");
986 static void signal_setup_default(struct signal_task
*st
)
988 st
->task
.pre_select
= signal_pre_select
;
989 st
->task
.post_select
= signal_post_select
;
990 sprintf(st
->task
.status
, "signal task");
993 static void command_pre_select(struct sched
*s
, struct task
*t
)
995 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
996 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
999 static void command_post_select(struct sched
*s
, struct task
*t
)
1002 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1003 static struct timeval last_status_dump
;
1004 struct timeval tmp
, delay
= {0, 500 * 1000};
1006 tv_add(&last_status_dump
, &delay
, &tmp
);
1007 if (tv_diff(&tmp
, now
, NULL
) < 0) {
1008 audiod_status_dump();
1009 last_status_dump
= *now
;
1012 ret
= handle_connect(ct
->fd
, &s
->rfds
);
1014 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1015 audiod_status_dump();
1018 static void init_command_task(struct command_task
*ct
)
1020 ct
->task
.pre_select
= command_pre_select
;
1021 ct
->task
.post_select
= command_post_select
;
1023 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1024 sprintf(ct
->task
.status
, "command task");
1027 static void close_stat_pipe(void)
1031 btr_free_node(stat_task
->ct
->btrn
);
1032 client_close(stat_task
->ct
);
1033 stat_task
->ct
= NULL
;
1034 clear_and_dump_items();
1035 stat_task
->length_seconds
= 0;
1036 stat_task
->offset_seconds
= 0;
1037 stat_task
->vss_status
= 0;
1038 stat_task
->current_audio_format_num
= -1;
1039 audiod_status_dump();
1043 * close the connection to para_server and exit
1045 * \param status the exit status which is passed to exit(3)
1046 * \param msg the log message
1048 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1049 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1054 void __noreturn
clean_exit(int status
, const char *msg
)
1056 PARA_EMERG_LOG("%s\n", msg
);
1058 unlink(socket_name
);
1063 /* avoid busy loop if server is down */
1064 static void set_stat_task_restart_barrier(unsigned seconds
)
1066 struct timeval delay
= {seconds
, 0};
1067 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1070 static void try_to_close_slot(int slot_num
)
1072 struct slot_info
*s
= &slot
[slot_num
];
1073 struct audio_format_info
*a
= afi
+ s
->format
;
1078 if (s
->receiver_node
&& s
->receiver_node
->task
.error
>= 0)
1080 for (i
= 0; i
< a
->num_filters
; i
++)
1081 if (s
->fns
&& s
->fns
[i
].task
.error
>= 0)
1083 if (a
->num_writers
> 0) {
1084 for (i
= 0; i
< a
->num_writers
; i
++)
1085 if (s
->wns
&& s
->wns
[i
].task
.error
>= 0)
1088 if (s
->wns
&& s
->wns
[0].task
.error
>= 0)
1091 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1094 close_receiver(slot_num
);
1095 clear_slot(slot_num
);
1099 * Check if any receivers/filters/writers need to be started and do so if
1102 static void start_stop_decoders(void)
1105 struct slot_info
*sl
;
1106 struct audio_format_info
*a
;
1109 try_to_close_slot(i
);
1110 if (audiod_status
!= AUDIOD_ON
||
1111 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1112 return kill_all_decoders(-E_NOT_PLAYING
);
1113 if (!must_start_decoder())
1115 ret
= open_receiver(stat_task
->current_audio_format_num
);
1117 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1121 a
= afi
+ sl
->format
;
1125 activate_grab_clients();
1126 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1129 static void status_pre_select(struct sched
*s
, struct task
*t
)
1131 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1132 int ret
, cafn
= stat_task
->current_audio_format_num
;
1134 if (must_start_decoder())
1136 ret
= btr_node_status(st
->btrn
, 0, BTR_NT_LEAF
);
1139 if (st
->ct
&& audiod_status
== AUDIOD_OFF
)
1141 if (!st
->ct
&& audiod_status
!= AUDIOD_OFF
)
1142 sched_request_barrier_or_min_delay(&st
->restart_barrier
, s
);
1144 sched_request_barrier(&afi
[cafn
].restart_barrier
, s
);
1146 * If para_server is playing we'd like to have a smooth time display
1147 * even if we are running in standby mode. So we request a timeout that
1148 * expires at the next full second.
1150 if (stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)
1151 sched_request_timeout_ms(1000 - now
->tv_usec
/ 1000, s
);
1157 /* restart the client task if necessary */
1158 static void status_post_select(__a_unused
struct sched
*s
, struct task
*t
)
1160 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1162 if (audiod_status
== AUDIOD_OFF
) {
1165 if (st
->ct
->task
.error
>= 0) {
1166 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, -E_AUDIOD_OFF
);
1169 if (st
->ct
->task
.error
>= 0)
1172 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1179 if (st
->ct
->task
.error
< 0) {
1180 if (st
->ct
->task
.error
>= 0)
1185 if (st
->ct
->status
!= CL_RECEIVING
)
1187 ret
= btr_node_status(st
->btrn
, st
->min_iqs
, BTR_NT_LEAF
);
1189 struct timeval diff
;
1190 tv_diff(now
, &st
->last_status_read
, &diff
);
1191 if (diff
.tv_sec
> 61)
1192 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
,
1196 btr_merge(st
->btrn
, st
->min_iqs
);
1197 sz
= btr_next_buffer(st
->btrn
, &buf
);
1198 ret
= for_each_stat_item(buf
, sz
, update_item
);
1200 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, ret
);
1204 btr_consume(st
->btrn
, sz
- ret
);
1205 st
->last_status_read
= *now
;
1207 } else /* current status item crosses buffers */
1208 st
->min_iqs
= sz
+ 1;
1211 btr_drain(st
->btrn
);
1212 st
->current_audio_format_num
= -1;
1213 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1215 if (st
->clock_diff_count
) { /* get status only one time */
1216 char *argv
[] = {"audiod", "--", "stat", "-p", "-n=1", NULL
};
1218 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1219 st
->clock_diff_count
--;
1220 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1221 set_stat_task_restart_barrier(2);
1224 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1226 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1227 set_stat_task_restart_barrier(5);
1229 free(stat_item_values
[SI_BASENAME
]);
1230 stat_item_values
[SI_BASENAME
] = para_strdup(
1231 "no connection to para_server");
1232 stat_client_write_item(SI_BASENAME
);
1233 st
->last_status_read
= *now
;
1235 start_stop_decoders();
1238 static void init_status_task(struct status_task
*st
)
1240 memset(st
, 0, sizeof(struct status_task
));
1241 st
->task
.pre_select
= status_pre_select
;
1242 st
->task
.post_select
= status_post_select
;
1243 st
->sa_time_diff_sign
= 1;
1244 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1245 st
->current_audio_format_num
= -1;
1246 sprintf(st
->task
.status
, "stat");
1247 st
->btrn
= btr_new_node(&(struct btr_node_description
)
1248 EMBRACE(.name
= "stat"));
1251 static void set_initial_status(void)
1253 audiod_status
= AUDIOD_ON
;
1254 if (!conf
.mode_given
)
1256 if (!strcmp(conf
.mode_arg
, "sb")) {
1257 audiod_status
= AUDIOD_STANDBY
;
1260 if (!strcmp(conf
.mode_arg
, "off")) {
1261 audiod_status
= AUDIOD_OFF
;
1264 if (strcmp(conf
.mode_arg
, "on"))
1265 PARA_WARNING_LOG("invalid mode\n");
1268 __noreturn
static void print_help_and_die(void)
1270 int d
= conf
.detailed_help_given
;
1271 const char **p
= d
? audiod_args_info_detailed_help
1272 : audiod_args_info_help
;
1274 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1275 AUDIOD_CMDLINE_PARSER_VERSION
);
1276 printf_or_die("%s\n\n", audiod_args_info_usage
);
1278 printf_or_die("%s\n", *p
);
1279 print_receiver_helps(d
);
1280 print_filter_helps(d
);
1281 print_writer_helps(d
);
1285 static void init_colors_or_die(void)
1291 daemon_set_default_log_colors();
1292 daemon_set_flag(DF_COLOR_LOG
);
1293 for (i
= 0; i
< conf
.log_color_given
; i
++)
1294 daemon_set_log_color_or_die(conf
.log_color_arg
[i
]);
1298 * the main function of para_audiod
1300 * \param argc usual argument count
1301 * \param argv usual argument vector
1303 * \return EXIT_SUCCESS or EXIT_FAILURE
1305 * \sa para_audiod(1)
1307 int main(int argc
, char *argv
[])
1310 static struct sched s
;
1311 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1312 struct audiod_cmdline_parser_params params
= {
1315 .check_required
= 0,
1316 .check_ambiguity
= 0,
1321 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1323 HANDLE_VERSION_FLAG("audiod", conf
);
1324 /* init receivers/filters/writers early to make help work */
1328 if (conf
.help_given
|| conf
.detailed_help_given
)
1329 print_help_and_die();
1330 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1331 parse_config_or_die();
1332 init_colors_or_die();
1333 init_random_seed_or_die();
1334 daemon_set_flag(DF_LOG_TIME
);
1335 daemon_set_flag(DF_LOG_HOSTNAME
);
1336 daemon_set_flag(DF_LOG_LL
);
1337 if (conf
.log_timing_given
)
1338 daemon_set_flag(DF_LOG_TIMING
);
1339 if (conf
.logfile_given
) {
1340 daemon_set_logfile(conf
.logfile_arg
);
1341 daemon_open_log_or_die();
1343 ret
= parse_stream_args();
1345 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1348 log_welcome("para_audiod");
1349 server_uptime(UPTIME_SET
);
1350 set_initial_status();
1353 setup_signal_handling();
1354 signal_setup_default(sig_task
);
1356 init_status_task(stat_task
);
1357 init_command_task(cmd_task
);
1359 if (conf
.daemon_given
)
1362 register_task(&sig_task
->task
);
1363 register_task(&cmd_task
->task
);
1364 register_task(&stat_task
->task
);
1365 s
.default_timeout
.tv_sec
= 2;
1366 s
.default_timeout
.tv_usec
= 999 * 1000;
1369 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1370 return EXIT_FAILURE
;