2 * Copyright (C) 2005-2014 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. */
9 #include <netinet/in.h>
10 #include <sys/socket.h>
12 #include <sys/types.h>
13 #include <arpa/inet.h>
21 #include "audiod.cmdline.h"
25 #include "buffer_tree.h"
28 #include "grab_client.h"
29 #include "client.cmdline.h"
37 #include "write_common.h"
41 __printf_2_3
void (*para_log
)(int, const char*, ...) = daemon_log
;
42 /** define the array of error lists needed by para_audiod */
44 /** define the array containing all supported audio formats */
45 const char *audio_formats
[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL
};
47 DEFINE_RECEIVER_ARRAY
;
49 /** Defines how audiod handles one supported audio format. */
50 struct audio_format_info
{
51 /** pointer to the receiver for this audio format */
52 struct receiver
*receiver
;
53 /** the receiver configuration */
55 /** the number of filters that should be activated for this audio format */
56 unsigned int num_filters
;
57 /** Array of filter numbers to be activated. */
58 unsigned *filter_nums
;
59 /** Pointer to the array of filter configurations. */
61 /** the number of filters that should be activated for this audio format */
62 unsigned int num_writers
;
63 /** Array of writer numbers to be activated. */
65 /** pointer to the array of writer configurations */
67 /** do not start receiver/filters/writer before this time */
68 struct timeval restart_barrier
;
72 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
73 * be associated with a receiver/filter/writer triple. This array holds all
74 * information on the status of these slots.
76 * \sa struct slot_info
78 struct slot_info slot
[MAX_STREAM_SLOTS
];
80 /** The vss status flags audiod is interested in. */
81 enum vss_status_flags
{
82 /** Whether the 'N' flag is set. */
83 VSS_STATUS_FLAG_NEXT
= 1,
84 /** The 'P' flag is set. */
85 VSS_STATUS_FLAG_PLAYING
= 2,
89 * The scheduler instance of para_audiod.
91 * This is needed also in audiod_command.c (for the tasks command), so it can
94 struct sched sched
= {.max_fileno
= 0};
97 * The task for obtaining para_server's status (para_client stat).
99 * \sa struct task, struct sched.
102 /** The associated task structure of audiod. */
104 /** Client data associated with the stat task. */
105 struct client_task
*ct
;
106 /** Do not restart client command until this time. */
107 struct timeval restart_barrier
;
108 /** Last time we received status data from para_server. */
109 struct timeval last_status_read
;
111 /** The offset value announced by para_server. */
113 /** The length of the current audio file as announced by para_server. */
115 /** The start of the current stream from the view of para_server. */
116 struct timeval server_stream_start
;
117 /** The average time deviation between para_server and para_audiod. */
118 struct timeval sa_time_diff
;
119 /** Whether client time is ahead of server time. */
120 int sa_time_diff_sign
;
121 /** The 'P' and the 'N' flags as announced by para_server. */
122 enum vss_status_flags vss_status
;
123 /** Number of times the clock difference is to be checked. */
124 unsigned clock_diff_count
;
125 /** When to start the next check for clock difference. */
126 struct timeval clock_diff_barrier
;
127 /** Number of the audio format as announced by para_server. */
128 int current_audio_format_num
;
129 /* The status task btrn is the child of the client task. */
130 struct btr_node
*btrn
;
133 /** The array of status items sent by para_server. */
134 char *stat_item_values
[NUM_STAT_ITEMS
] = {NULL
};
137 * the current mode of operation of which can be changed by the on/off/cycle
138 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
140 int audiod_status
= AUDIOD_ON
;
143 * the gengetopt args_info struct that holds information on all command line
146 struct audiod_args_info conf
;
148 static char *socket_name
;
149 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
151 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
153 static struct status_task status_task_struct
;
156 * the task that calls the status command of para_server
158 * \sa struct status_task
160 static struct status_task
*stat_task
= &status_task_struct
;
163 * the task for handling audiod commands
165 * \sa struct task, struct sched
167 struct command_task
{
168 /** the local listening socket */
170 /** the associated task structure */
174 /** iterate over all supported audio formats */
175 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
178 * Get the audio format number.
180 * \param name The name of the audio format.
182 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
183 * \a name is not a supported audio format.
185 static int get_audio_format_num(const char *name
)
189 while (para_isspace(*name
))
191 FOR_EACH_AUDIO_FORMAT(i
)
192 if (!strcmp(name
, audio_formats
[i
]))
194 return -E_UNSUPPORTED_AUDIO_FORMAT
;
197 static int get_matching_audio_format_nums(const char *re
)
202 ret
= para_regcomp(&preg
, re
, REG_EXTENDED
| REG_NOSUB
);
206 FOR_EACH_AUDIO_FORMAT(i
)
207 if (regexec(&preg
, audio_formats
[i
], 0, NULL
, 0) != REG_NOMATCH
)
214 * Compute the play time based on information of the given slot.
216 * \param slot_num The slot number (negative means: no slot).
218 * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
219 * from the status items received from para_server and the start time of the
220 * (first) writer of the given slot.
222 * It has to take into account that the stream was probably not started at
223 * the beginning of the file, that the clock between the server and the client
224 * host may differ and that playback of the stream was delayed, e.g. because
225 * the prebuffer filter is used in the filter configuration of the given slot.
227 * If no writer is active in the given slot, or \a slot_num is negative
228 * (indicating that para_audiod runs in standby mode), an approximation based
229 * only on the status items is computed and the returned string is prefixed
232 * \return A string that must be freed by the caller.
234 char *get_time_string(int slot_num
)
236 int ret
, seconds
= 0, length
;
237 struct timeval
*tmp
, sum
, sss
, /* server stream start */
238 rstime
, /* receiver start time */
239 wstime
, /* writer start time */
240 wtime
, /* now - writer start */
241 rskip
; /* receiver start - sss */
242 struct slot_info
*s
= slot_num
< 0? NULL
: &slot
[slot_num
];
245 if (audiod_status
== AUDIOD_OFF
)
247 if (!(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)) {
248 if (stat_task
->length_seconds
) /* paused */
250 goto empty
; /* stopped */
252 if (audiod_status
== AUDIOD_ON
&& !s
)
255 * Valid status items and playing, set length and tmp to the stream
256 * start. We use the slot info and fall back to the info from current
257 * status items if no slot info is available.
259 length
= stat_task
->length_seconds
;
260 tmp
= &stat_task
->server_stream_start
;
261 if (s
&& s
->wns
&& s
->wns
[0].btrn
) { /* writer active in this slot */
262 btr_get_node_start(s
->wns
[0].btrn
, &wstime
);
263 if (wstime
.tv_sec
!= 0) { /* writer wrote something */
264 if (s
->server_stream_start
.tv_sec
== 0) {
265 /* copy status info to slot */
266 s
->server_stream_start
= stat_task
->server_stream_start
;
267 s
->offset_seconds
= stat_task
->offset_seconds
;
268 s
->seconds_total
= stat_task
->length_seconds
;
270 length
= s
->seconds_total
;
271 tmp
= &s
->server_stream_start
;
274 if (stat_task
->sa_time_diff_sign
> 0)
275 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
277 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
278 if (!s
|| !s
->wns
|| !s
->wns
[0].btrn
) {
280 tv_diff(now
, &sss
, &diff
);
281 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
284 tv_diff(now
, &wstime
, &wtime
);
285 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
286 seconds
= s
->offset_seconds
;
287 if (s
->receiver_node
->btrn
) {
288 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
289 ret
= tv_diff(&rstime
, &sss
, &rskip
);
290 if (ret
> 0) { /* audiod was started in the middle of the stream */
291 tv_add(&wtime
, &rskip
, &sum
);
292 seconds
+= sum
.tv_sec
;
294 seconds
+= wtime
.tv_sec
;
296 seconds
+= wtime
.tv_sec
;
298 seconds
= PARA_MIN(seconds
, length
);
299 seconds
= PARA_MAX(seconds
, 0);
301 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
305 (length
- seconds
) / 60,
306 (length
- seconds
) % 60,
307 length
? (seconds
* 100 + length
/ 2) / length
: 0,
311 //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
314 return para_strdup(NULL
);
317 static int want_colors(void)
319 if (conf
.color_arg
== color_arg_no
)
321 if (conf
.color_arg
== color_arg_yes
)
323 if (conf
.logfile_given
)
325 return isatty(STDERR_FILENO
);
328 static void parse_config_or_die(void)
332 struct audiod_cmdline_parser_params params
= {
336 .check_ambiguity
= 0,
340 if (conf
.config_file_given
)
341 config_file
= para_strdup(conf
.config_file_arg
);
343 char *home
= para_homedir();
344 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
347 ret
= file_exists(config_file
);
348 if (conf
.config_file_given
&& !ret
) {
349 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
353 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
354 daemon_set_loglevel(conf
.loglevel_arg
);
363 static void setup_signal_handling(void)
365 sig_task
->fd
= para_signal_init();
366 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
367 para_install_sighandler(SIGINT
);
368 para_install_sighandler(SIGTERM
);
369 para_install_sighandler(SIGHUP
);
370 para_sigaction(SIGPIPE
, SIG_IGN
);
373 static void clear_slot(int slot_num
)
375 struct slot_info
*s
= &slot
[slot_num
];
377 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
378 memset(s
, 0, sizeof(struct slot_info
));
382 static void close_receiver(int slot_num
)
384 struct slot_info
*s
= &slot
[slot_num
];
385 struct audio_format_info
*a
;
387 if (s
->format
< 0 || !s
->receiver_node
)
390 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
391 audio_formats
[s
->format
], slot_num
);
392 a
->receiver
->close(s
->receiver_node
);
393 btr_remove_node(&s
->receiver_node
->btrn
);
394 free(s
->receiver_node
);
395 s
->receiver_node
= NULL
;
396 tv_add(now
, &(struct timeval
)EMBRACE(0, 200 * 1000),
397 &a
->restart_barrier
);
400 static void writer_cleanup(struct writer_node
*wn
)
406 w
= writers
+ wn
->writer_num
;
407 PARA_INFO_LOG("closing %s\n", writer_names
[wn
->writer_num
]);
409 btr_remove_node(&wn
->btrn
);
412 static void close_writers(struct slot_info
*s
)
414 struct audio_format_info
*a
;
421 if (a
->num_writers
== 0)
422 writer_cleanup(s
->wns
);
424 for (i
= 0; i
< a
->num_writers
; i
++)
425 writer_cleanup(s
->wns
+ i
);
431 static void close_filters(struct slot_info
*s
)
434 struct audio_format_info
*a
= afi
+ s
->format
;
435 if (a
->num_filters
== 0)
437 for (i
= a
->num_filters
- 1; i
>= 0; i
--) {
438 struct filter_node
*fn
= s
->fns
+ i
;
443 f
= filters
+ fn
->filter_num
;
446 btr_remove_node(&fn
->btrn
);
452 static void notify_receivers(int error
)
457 struct slot_info
*s
= slot
+ i
;
460 if (!s
->receiver_node
)
462 task_notify(&s
->receiver_node
->task
, error
);
466 static int get_empty_slot(void)
477 if (s
->wns
|| s
->receiver_node
|| s
->fns
)
482 return -E_NO_MORE_SLOTS
;
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
;
506 fn
->btrn
= btr_new_node(&(struct btr_node_description
)
507 EMBRACE(.name
= f
->name
, .parent
= parent
,
508 .handler
= f
->execute
, .context
= fn
));
511 register_task(&sched
, &fn
->task
);
513 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
514 audio_formats
[s
->format
], i
, nf
, f
->name
, (int)(s
- slot
));
515 sprintf(fn
->task
.status
, "%s (slot %d)", f
->name
, (int)(s
- slot
));
519 static void open_writers(struct slot_info
*s
)
522 struct audio_format_info
*a
= afi
+ s
->format
;
523 struct writer_node
*wn
;
524 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
526 assert(s
->wns
== NULL
);
527 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
528 * sizeof(struct writer_node
));
529 for (i
= 0; i
< a
->num_writers
; i
++) {
531 wn
->conf
= a
->writer_conf
[i
];
532 wn
->writer_num
= a
->writer_nums
[i
];
533 register_writer_node(wn
, parent
, &sched
);
534 PARA_NOTICE_LOG("%s writer started in slot %d\n",
535 writer_names
[a
->writer_nums
[i
]], (int)(s
- slot
));
539 /* returns slot num on success */
540 static int open_receiver(int format
)
542 struct audio_format_info
*a
= &afi
[format
];
545 struct receiver
*r
= a
->receiver
;
546 struct receiver_node
*rn
;
548 tv_add(now
, &(struct timeval
)EMBRACE(2, 0), &a
->restart_barrier
);
549 ret
= get_empty_slot();
553 rn
= para_calloc(sizeof(*rn
));
555 rn
->conf
= a
->receiver_conf
;
556 rn
->btrn
= btr_new_node(&(struct btr_node_description
)
557 EMBRACE(.name
= r
->name
, .context
= rn
));
560 btr_remove_node(&rn
->btrn
);
566 s
->receiver_node
= rn
;
567 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
568 audio_formats
[format
], r
->name
, slot_num
);
569 rn
->task
.pre_select
= r
->pre_select
;
570 rn
->task
.post_select
= r
->post_select
;
571 sprintf(rn
->task
.status
, "%s receiver node", r
->name
);
572 register_task(&sched
, &rn
->task
);
576 static bool receiver_running(void)
579 long unsigned ss1
= stat_task
->server_stream_start
.tv_sec
;
582 struct slot_info
*s
= &slot
[i
];
583 long unsigned ss2
= s
->server_stream_start
.tv_sec
;
585 if (!s
->receiver_node
)
587 if (s
->receiver_node
->task
.error
>= 0)
596 * Return the root node of the current buffer tree.
598 * This is only used for stream grabbing.
600 * \return \p NULL if no slot is currently active. If more than one buffer tree
601 * exists, the node corresponding to the most recently started receiver is
604 struct btr_node
*audiod_get_btr_root(void)
606 int i
, newest_slot
= -1;
607 struct timeval newest_rstime
= {0, 0};
610 struct slot_info
*s
= &slot
[i
];
611 struct timeval rstime
;
612 if (!s
->receiver_node
)
614 if (s
->receiver_node
->task
.error
< 0)
616 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
617 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
619 newest_rstime
= rstime
;
622 if (newest_slot
== -1)
624 return slot
[newest_slot
].receiver_node
->btrn
;
627 /* whether a new instance of a decoder should be started. */
628 static bool must_start_decoder(void)
630 int cafn
= stat_task
->current_audio_format_num
;
631 unsigned vs
= stat_task
->vss_status
;
633 if (audiod_status
!= AUDIOD_ON
)
639 if (vs
& VSS_STATUS_FLAG_NEXT
)
641 if (!(vs
& VSS_STATUS_FLAG_PLAYING
))
643 if (receiver_running())
645 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, NULL
) < 0)
650 static void compute_time_diff(const struct timeval
*status_time
)
652 struct timeval tmp
, diff
;
653 static unsigned count
;
654 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
655 const struct timeval max_deviation
= {0, 500 * 1000};
656 const int time_smooth
= 5;
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
;
689 static int update_item(int itemnum
, char *buf
)
691 long unsigned sec
, usec
;
693 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
695 free(stat_item_values
[itemnum
]);
696 stat_item_values
[itemnum
] = para_strdup(buf
);
697 stat_client_write_item(itemnum
);
699 case SI_STATUS_FLAGS
:
700 stat_task
->vss_status
= 0;
701 if (strchr(buf
, 'N'))
702 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
703 if (strchr(buf
, 'P'))
704 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
707 stat_task
->offset_seconds
= atoi(buf
);
709 case SI_SECONDS_TOTAL
:
710 stat_task
->length_seconds
= atoi(buf
);
712 case SI_STREAM_START
:
713 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
714 stat_task
->server_stream_start
.tv_sec
= sec
;
715 stat_task
->server_stream_start
.tv_usec
= usec
;
718 case SI_CURRENT_TIME
:
719 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
720 struct timeval tv
= {sec
, usec
};
721 compute_time_diff(&tv
);
725 stat_task
->current_audio_format_num
726 = get_audio_format_num(buf
);
731 static int parse_stream_command(const char *txt
, char **cmd
)
734 char *re
, *p
= strchr(txt
, ':');
737 return -E_MISSING_COLON
;
740 re
= malloc(len
+ 1);
741 strncpy(re
, txt
, len
);
743 ret
= get_matching_audio_format_nums(re
);
748 static int add_filter(int format
, char *cmdline
)
750 struct audio_format_info
*a
= &afi
[format
];
751 int filter_num
, nf
= a
->num_filters
;
754 filter_num
= check_filter_arg(cmdline
, &cfg
);
757 a
->filter_conf
= para_realloc(a
->filter_conf
,
758 (nf
+ 1) * sizeof(void *));
759 a
->filter_nums
= para_realloc(a
->filter_nums
,
760 (nf
+ 1) * sizeof(unsigned));
761 a
->filter_nums
[nf
] = filter_num
;
762 a
->filter_conf
[nf
] = cfg
;
764 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
765 filters
[filter_num
].name
);
769 static int parse_writer_args(void)
773 struct audio_format_info
*a
;
775 for (i
= 0; i
< conf
.writer_given
; i
++) {
777 int j
, nw
, writer_num
, af_mask
;
779 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
783 FOR_EACH_AUDIO_FORMAT(j
) {
785 if ((af_mask
& (1 << j
)) == 0) /* no match */
787 wconf
= check_writer_arg_or_die(cmd
, &writer_num
);
789 a
->writer_nums
= para_realloc(a
->writer_nums
, (nw
+ 1) * sizeof(int));
790 a
->writer_conf
= para_realloc(a
->writer_conf
, (nw
+ 1) * sizeof(void *));
791 a
->writer_nums
[nw
] = writer_num
;
792 a
->writer_conf
[nw
] = wconf
;
793 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[j
],
794 nw
, writer_names
[writer_num
]);
798 /* Use default writer for audio formats which are not yet set up. */
799 FOR_EACH_AUDIO_FORMAT(i
) {
803 if (a
->num_writers
> 0)
804 continue; /* already set up */
805 writer_conf
= check_writer_arg_or_die(NULL
, &writer_num
);
806 a
->writer_nums
= para_malloc(sizeof(int));
807 a
->writer_nums
[0] = writer_num
;
808 a
->writer_conf
= para_malloc(sizeof(void *));
809 a
->writer_conf
[0] = writer_conf
;
811 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats
[i
],
812 writer_names
[writer_num
]);
817 static int parse_receiver_args(void)
819 int i
, ret
, receiver_num
;
821 struct audio_format_info
*a
;
823 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
827 ret
= parse_stream_command(conf
.receiver_arg
[i
], &arg
);
831 FOR_EACH_AUDIO_FORMAT(j
) {
833 if ((af_mask
& (1 << j
)) == 0) /* no match */
836 * If multiple receivers are given for this audio format, the
837 * last one wins and we have to free the previous receiver
838 * config here. Since we are iterating backwards, the winning
839 * receiver arg is in fact the first one given.
841 if (a
->receiver_conf
)
842 a
->receiver
->free_config(a
->receiver_conf
);
843 a
->receiver_conf
= check_receiver_arg(arg
, &receiver_num
);
844 ret
= -E_RECV_SYNTAX
;
845 if (!a
->receiver_conf
)
847 a
->receiver
= receivers
+ receiver_num
;
851 * Use the first available receiver with no arguments for those audio
852 * formats for which no receiver was specified.
854 cmd
= para_strdup(receivers
[0].name
);
855 FOR_EACH_AUDIO_FORMAT(i
) {
857 if (a
->receiver_conf
)
859 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
860 if (!a
->receiver_conf
)
861 return -E_RECV_SYNTAX
;
862 a
->receiver
= &receivers
[receiver_num
];
864 FOR_EACH_AUDIO_FORMAT(i
) {
866 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
867 audio_formats
[i
], a
->receiver
->name
);
875 static int init_default_filters(void)
879 FOR_EACH_AUDIO_FORMAT(i
) {
880 struct audio_format_info
*a
= &afi
[i
];
885 continue; /* no default -- nothing to to */
887 * udp and dccp streams are fec-encoded, so add fecdec as the
890 if (strcmp(afi
[i
].receiver
->name
, "udp") == 0 ||
891 strcmp(afi
[i
].receiver
->name
, "dccp") == 0) {
892 tmp
= para_strdup("fecdec");
898 /* add "dec" to audio format name */
899 tmp
= make_message("%sdec", audio_formats
[i
]);
900 for (j
= 0; filters
[j
].name
; j
++)
901 if (!strcmp(tmp
, filters
[j
].name
))
904 ret
= -E_UNSUPPORTED_FILTER
;
905 if (!filters
[j
].name
)
907 tmp
= para_strdup(filters
[j
].name
);
908 ret
= add_filter(i
, tmp
);
912 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
919 static int parse_filter_args(void)
921 int i
, j
, ret
, af_mask
, num_matches
;
923 for (i
= 0; i
< conf
.filter_given
; i
++) {
925 ret
= parse_stream_command(conf
.filter_arg
[i
], &arg
);
930 FOR_EACH_AUDIO_FORMAT(j
) {
931 if ((af_mask
& (1 << j
)) == 0) /* no match */
933 ret
= add_filter(j
, arg
);
938 if (num_matches
== 0)
939 PARA_WARNING_LOG("ignoring filter spec: %s\n",
942 ret
= init_default_filters(); /* use default values for the rest */
947 static int parse_stream_args(void)
951 ret
= parse_receiver_args();
954 ret
= parse_filter_args();
957 ret
= parse_writer_args();
963 /* does not unlink socket on errors */
964 static int audiod_get_socket(void)
966 struct sockaddr_un unix_addr
;
969 if (conf
.socket_given
)
970 socket_name
= para_strdup(conf
.socket_arg
);
972 char *hn
= para_hostname();
973 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
977 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
978 if (conf
.force_given
)
980 ret
= create_local_socket(socket_name
, &unix_addr
,
981 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
985 if (listen(fd
, 5) < 0) {
986 ret
= -ERRNO_TO_PARA_ERROR(errno
);
989 ret
= mark_fd_nonblocking(fd
);
994 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
998 static void signal_pre_select(struct sched
*s
, struct task
*t
)
1000 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
1001 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
1004 static int signal_post_select(struct sched
*s
, __a_unused
struct task
*t
)
1008 signum
= para_next_signal(&s
->rfds
);
1013 PARA_NOTICE_LOG("received signal %d\n", signum
);
1014 clean_exit(EXIT_FAILURE
, "caught deadly signal");
1019 static void signal_setup_default(struct signal_task
*st
)
1021 st
->task
.pre_select
= signal_pre_select
;
1022 st
->task
.post_select
= signal_post_select
;
1023 sprintf(st
->task
.status
, "signal task");
1026 static void command_pre_select(struct sched
*s
, struct task
*t
)
1028 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1029 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1032 static int command_post_select(struct sched
*s
, struct task
*t
)
1035 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1036 static struct timeval last_status_dump
;
1037 struct timeval tmp
, delay
;
1040 ret
= handle_connect(ct
->fd
, &s
->rfds
);
1042 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1046 /* if last status dump was less than 500ms ago, do nothing */
1048 delay
.tv_usec
= 500 * 1000;
1049 tv_add(&last_status_dump
, &delay
, &tmp
);
1050 if (tv_diff(now
, &tmp
, NULL
) < 0)
1054 * If last status dump was more than 5s ago, force update. Otherwise,
1055 * update only those items that have changed.
1059 tv_add(&last_status_dump
, &delay
, &tmp
);
1060 if (tv_diff(now
, &tmp
, NULL
) < 0)
1063 audiod_status_dump(force
);
1064 last_status_dump
= *now
;
1068 static void init_command_task(struct command_task
*ct
)
1070 ct
->task
.pre_select
= command_pre_select
;
1071 ct
->task
.post_select
= command_post_select
;
1073 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1074 sprintf(ct
->task
.status
, "command task");
1077 static void close_stat_pipe(void)
1081 client_close(stat_task
->ct
);
1082 stat_task
->ct
= NULL
;
1083 clear_and_dump_items();
1084 stat_task
->length_seconds
= 0;
1085 stat_task
->offset_seconds
= 0;
1086 stat_task
->vss_status
= 0;
1087 stat_task
->current_audio_format_num
= -1;
1088 audiod_status_dump(true);
1091 /* avoid busy loop if server is down */
1092 static void set_stat_task_restart_barrier(unsigned seconds
)
1094 struct timeval delay
= {seconds
, 0};
1095 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1098 static bool must_close_slot(int slot_num
)
1100 struct slot_info
*s
= &slot
[slot_num
];
1101 struct audio_format_info
*a
= afi
+ s
->format
;
1106 if (s
->receiver_node
&& s
->receiver_node
->task
.error
>= 0)
1108 for (i
= 0; i
< a
->num_filters
; i
++)
1109 if (s
->fns
&& s
->fns
[i
].task
.error
>= 0)
1111 if (a
->num_writers
> 0) {
1112 for (i
= 0; i
< a
->num_writers
; i
++)
1113 if (s
->wns
&& s
->wns
[i
].task
.error
>= 0)
1116 if (s
->wns
&& s
->wns
[0].task
.error
>= 0)
1122 static void close_slot(int slot_num
)
1124 struct slot_info
*s
= slot
+ slot_num
;
1126 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1129 close_receiver(slot_num
);
1130 clear_slot(slot_num
);
1133 static void close_unused_slots(void)
1138 if (must_close_slot(i
))
1143 * Close the connection to para_server and exit.
1145 * \param status The exit status which is passed to exit(3).
1146 * \param msg The log message
1148 * Log \a msg with loglevel \p EMERG, close the connection to para_server and
1149 * all slots, and call \p exit(status). \a status should be either EXIT_SUCCESS
1154 void __noreturn
clean_exit(int status
, const char *msg
)
1157 unlink(socket_name
);
1159 close_unused_slots();
1160 audiod_cmdline_parser_free(&conf
);
1161 close_stat_clients();
1162 PARA_EMERG_LOG("%s\n", msg
);
1167 * Check if any receivers/filters/writers need to be started and do so if
1170 static void start_stop_decoders(void)
1173 struct slot_info
*sl
;
1174 struct audio_format_info
*a
;
1176 close_unused_slots();
1177 if (audiod_status
!= AUDIOD_ON
||
1178 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1179 return notify_receivers(E_NOT_PLAYING
);
1180 if (!must_start_decoder())
1182 ret
= open_receiver(stat_task
->current_audio_format_num
);
1184 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1188 a
= afi
+ sl
->format
;
1192 activate_grab_clients(&sched
);
1193 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1196 static void status_pre_select(struct sched
*s
, struct task
*t
)
1198 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1199 int i
, ret
, cafn
= stat_task
->current_audio_format_num
;
1201 if (must_start_decoder())
1204 if (must_close_slot(i
))
1206 ret
= btr_node_status(st
->btrn
, st
->min_iqs
, BTR_NT_LEAF
);
1209 if (st
->ct
&& audiod_status
== AUDIOD_OFF
)
1211 if (!st
->ct
&& audiod_status
!= AUDIOD_OFF
)
1212 sched_request_barrier_or_min_delay(&st
->restart_barrier
, s
);
1214 sched_request_barrier(&afi
[cafn
].restart_barrier
, s
);
1216 * If para_server is playing we'd like to have a smooth time display
1217 * even if we are running in standby mode. So we request a timeout that
1218 * expires at the next full second.
1220 if (stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)
1221 sched_request_timeout_ms(1000 - now
->tv_usec
/ 1000, s
);
1227 /* restart the client task if necessary */
1228 static int status_post_select(struct sched
*s
, struct task
*t
)
1230 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1232 if (audiod_status
== AUDIOD_OFF
) {
1235 if (st
->ct
->task
.error
>= 0) {
1236 task_notify(&st
->ct
->task
, E_AUDIOD_OFF
);
1240 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1248 ret
= btr_node_status(st
->btrn
, st
->min_iqs
, BTR_NT_LEAF
);
1253 if (st
->ct
->status
!= CL_EXECUTING
)
1256 struct timeval diff
;
1257 tv_diff(now
, &st
->last_status_read
, &diff
);
1258 if (diff
.tv_sec
> 61)
1259 task_notify(&st
->ct
->task
, E_STATUS_TIMEOUT
);
1262 btr_merge(st
->btrn
, st
->min_iqs
);
1263 sz
= btr_next_buffer(st
->btrn
, &buf
);
1264 ret
= for_each_stat_item(buf
, sz
, update_item
);
1266 task_notify(&st
->ct
->task
, -ret
);
1270 btr_consume(st
->btrn
, sz
- ret
);
1271 st
->last_status_read
= *now
;
1273 } else /* current status item crosses buffers */
1274 st
->min_iqs
= sz
+ 1;
1277 btr_drain(st
->btrn
);
1278 st
->current_audio_format_num
= -1;
1279 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1281 if (st
->clock_diff_count
) { /* get status only one time */
1282 char *argv
[] = {"audiod", "--", "stat", "-p", "-n=1", NULL
};
1284 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1285 st
->clock_diff_count
--;
1286 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
, s
);
1287 set_stat_task_restart_barrier(2);
1290 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1292 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
, s
);
1293 set_stat_task_restart_barrier(5);
1295 free(stat_item_values
[SI_BASENAME
]);
1296 stat_item_values
[SI_BASENAME
] = para_strdup(
1297 "no connection to para_server");
1298 stat_client_write_item(SI_BASENAME
);
1299 st
->last_status_read
= *now
;
1301 start_stop_decoders();
1305 static void init_status_task(struct status_task
*st
)
1307 memset(st
, 0, sizeof(struct status_task
));
1308 st
->task
.pre_select
= status_pre_select
;
1309 st
->task
.post_select
= status_post_select
;
1310 st
->sa_time_diff_sign
= 1;
1311 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1312 st
->current_audio_format_num
= -1;
1313 sprintf(st
->task
.status
, "stat");
1314 st
->btrn
= btr_new_node(&(struct btr_node_description
)
1315 EMBRACE(.name
= "stat"));
1318 static void set_initial_status(void)
1320 audiod_status
= AUDIOD_ON
;
1321 if (!conf
.mode_given
)
1323 if (!strcmp(conf
.mode_arg
, "sb")) {
1324 audiod_status
= AUDIOD_STANDBY
;
1327 if (!strcmp(conf
.mode_arg
, "off")) {
1328 audiod_status
= AUDIOD_OFF
;
1331 if (strcmp(conf
.mode_arg
, "on"))
1332 PARA_WARNING_LOG("invalid mode\n");
1335 __noreturn
static void print_help_and_die(void)
1337 struct ggo_help h
= DEFINE_GGO_HELP(audiod
);
1338 bool d
= conf
.detailed_help_given
;
1341 flags
= d
? GPH_STANDARD_FLAGS_DETAILED
: GPH_STANDARD_FLAGS
;
1342 ggo_print_help(&h
, flags
);
1344 flags
= d
? GPH_MODULE_FLAGS_DETAILED
: GPH_MODULE_FLAGS
;
1345 print_receiver_helps(flags
);
1346 print_filter_helps(flags
);
1347 print_writer_helps(flags
);
1351 static void init_colors_or_die(void)
1357 daemon_set_default_log_colors();
1358 daemon_set_flag(DF_COLOR_LOG
);
1359 for (i
= 0; i
< conf
.log_color_given
; i
++)
1360 daemon_set_log_color_or_die(conf
.log_color_arg
[i
]);
1364 * the main function of para_audiod
1366 * \param argc usual argument count
1367 * \param argv usual argument vector
1369 * \return EXIT_SUCCESS or EXIT_FAILURE
1371 * \sa para_audiod(1)
1373 int main(int argc
, char *argv
[])
1376 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1377 struct audiod_cmdline_parser_params params
= {
1380 .check_required
= 0,
1381 .check_ambiguity
= 0,
1386 audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
);
1387 daemon_set_loglevel(conf
.loglevel_arg
);
1388 version_handle_flag("audiod", conf
.version_given
);
1389 /* init receivers/filters/writers early to make help work */
1393 if (conf
.help_given
|| conf
.detailed_help_given
)
1394 print_help_and_die();
1395 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1396 parse_config_or_die();
1397 init_colors_or_die();
1398 init_random_seed_or_die();
1399 daemon_set_flag(DF_LOG_TIME
);
1400 daemon_set_flag(DF_LOG_HOSTNAME
);
1401 daemon_set_flag(DF_LOG_LL
);
1402 if (conf
.log_timing_given
)
1403 daemon_set_flag(DF_LOG_TIMING
);
1404 if (conf
.logfile_given
) {
1405 daemon_set_logfile(conf
.logfile_arg
);
1406 daemon_open_log_or_die();
1408 ret
= parse_stream_args();
1410 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1413 log_welcome("para_audiod");
1414 set_server_start_time(NULL
);
1415 set_initial_status();
1418 setup_signal_handling();
1419 signal_setup_default(sig_task
);
1421 init_status_task(stat_task
);
1422 init_command_task(cmd_task
);
1424 if (conf
.daemon_given
)
1425 daemonize(false /* parent exits immediately */);
1427 register_task(&sched
, &sig_task
->task
);
1428 register_task(&sched
, &cmd_task
->task
);
1429 register_task(&sched
, &stat_task
->task
);
1430 sched
.default_timeout
.tv_sec
= 2;
1431 sched
.default_timeout
.tv_usec
= 999 * 1000;
1432 ret
= schedule(&sched
);
1434 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1435 return EXIT_FAILURE
;