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 */
12 #include <openssl/rc4.h>
18 #include "audiod.cmdline.h"
23 #include "buffer_tree.h"
25 #include "grab_client.h"
26 #include "client.cmdline.h"
34 #include "write_common.h"
37 /** define the array of error lists needed by para_audiod */
39 /** define the array containing all supported audio formats */
40 const char *audio_formats
[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL
};
42 /** Defines how audiod handles one supported audio format. */
43 struct audio_format_info
{
44 /** pointer to the receiver for this audio format */
45 struct receiver
*receiver
;
46 /** the receiver configuration */
48 /** the number of filters that should be activated for this audio format */
49 unsigned int num_filters
;
50 /** Array of filter numbers to be activated. */
51 unsigned *filter_nums
;
52 /** Pointer to the array of filter configurations. */
54 /** the number of filters that should be activated for this audio format */
55 unsigned int num_writers
;
56 /** Array of writer numbers to be activated. */
58 /** pointer to the array of writer configurations */
60 /** do not start receiver/filters/writer before this time */
61 struct timeval restart_barrier
;
65 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
66 * be associated with a receiver/filter/writer triple. This array holds all
67 * information on the status of these slots.
69 * \sa struct slot_info
71 struct slot_info slot
[MAX_STREAM_SLOTS
];
73 /** The vss status flags audiod is interested in. */
74 enum vss_status_flags
{
75 /** Whether the 'N' flag is set. */
76 VSS_STATUS_FLAG_NEXT
= 1,
77 /** The 'P' flag is set. */
78 VSS_STATUS_FLAG_PLAYING
= 2,
82 * The task for obtaining para_server's status (para_client stat).
84 * \sa struct task, struct sched.
87 /** The associated task structure of audiod. */
89 /** Client data associated with the stat task. */
90 struct client_task
*ct
;
91 /** Do not restart client command until this time. */
92 struct timeval restart_barrier
;
93 /** Last time we received status data from para_server. */
94 struct timeval last_status_read
;
96 /** The offset value announced by para_server. */
98 /** The length of the current audio file as announced by para_server. */
100 /** The start of the current stream from the view of para_server. */
101 struct timeval server_stream_start
;
102 /** The average time deviation between para_server and para_audiod. */
103 struct timeval sa_time_diff
;
104 /** Whether client time is ahead of server time. */
105 int sa_time_diff_sign
;
106 /** The 'P' and the 'N' flags as announced by para_server. */
107 enum vss_status_flags vss_status
;
108 /** Number of times the clock difference is to be checked. */
109 unsigned clock_diff_count
;
110 /** When to start the next check for clock difference. */
111 struct timeval clock_diff_barrier
;
112 /** Number of the audio format as announced by para_server. */
113 int current_audio_format_num
;
114 /* The status task btrn is the child of the client task. */
115 struct btr_node
*btrn
;
118 /** The array of status items sent by para_server. */
119 char *stat_item_values
[NUM_STAT_ITEMS
] = {NULL
};
122 * the current mode of operation of which can be changed by the on/off/cycle
123 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
125 int audiod_status
= AUDIOD_ON
;
128 * the gengetopt args_info struct that holds information on all command line
131 struct audiod_args_info conf
;
133 static char *socket_name
;
134 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
136 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
138 static struct status_task status_task_struct
;
141 * the task that calls the status command of para_server
143 * \sa struct status_task
145 static struct status_task
*stat_task
= &status_task_struct
;
148 * the task for handling audiod commands
150 * \sa struct task, struct sched
152 struct command_task
{
153 /** the local listening socket */
155 /** the associated task structure */
159 /** iterate over all supported audio formats */
160 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
163 * Get the audio format number.
165 * \param name The name of the audio format.
167 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
168 * \a name is not a supported audio format.
170 static int get_audio_format_num(const char *name
)
174 while (para_isspace(*name
))
176 FOR_EACH_AUDIO_FORMAT(i
)
177 if (!strcmp(name
, audio_formats
[i
]))
179 return -E_UNSUPPORTED_AUDIO_FORMAT
;
183 * Compute the play time based on information of the given slot.
185 * \param slot_num The slot number (negative means: no slot).
187 * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
188 * from the status items received from para_server and the start time of the
189 * (first) writer of the given slot.
191 * It has to to take into account that probably the stream was not started at
192 * the beginning of the file, that the clock between the server and the client
193 * host may differ and that playback of the stream was delayed, e.g. because
194 * the prebuffer filter is used in the filter configuration of the given slot.
196 * If no writer is active in the given slot, or \a slot_num is negative
197 * (indicating that para_audiod runs in standby mode), an approximation based
198 * only on the status items is computed and the returned string is prefixed
201 * \return A string that must be freed by the caller.
203 char *get_time_string(int slot_num
)
205 int ret
, seconds
= 0, length
;
206 struct timeval
*tmp
, sum
, sss
, /* server stream start */
207 rstime
, /* receiver start time */
208 wstime
, /* writer start time */
209 wtime
, /* now - writer start */
210 rskip
; /* receiver start - sss */
211 struct slot_info
*s
= slot_num
< 0? NULL
: &slot
[slot_num
];
214 if (audiod_status
== AUDIOD_OFF
)
216 if (!(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)) {
217 if (stat_task
->length_seconds
) /* paused */
219 goto empty
; /* stopped */
221 if (audiod_status
== AUDIOD_ON
&& !s
)
224 * Valid status items and playing, set length and tmp to the stream
225 * start. We use the slot info and fall back to the info from current
226 * status items if no slot info is available.
228 length
= stat_task
->length_seconds
;
229 tmp
= &stat_task
->server_stream_start
;
230 if (s
&& s
->wns
) { /* writer active in this slot */
231 btr_get_node_start(s
->wns
[0].btrn
, &wstime
);
232 if (wstime
.tv_sec
!= 0) { /* writer wrote something */
233 if (s
->server_stream_start
.tv_sec
== 0) {
234 /* copy status info to slot */
235 s
->server_stream_start
= stat_task
->server_stream_start
;
236 s
->offset_seconds
= stat_task
->offset_seconds
;
237 s
->seconds_total
= stat_task
->length_seconds
;
239 length
= s
->seconds_total
;
240 tmp
= &s
->server_stream_start
;
243 if (stat_task
->sa_time_diff_sign
> 0)
244 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
246 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
249 tv_diff(now
, &sss
, &diff
);
250 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
253 tv_diff(now
, &wstime
, &wtime
);
254 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
255 seconds
= s
->offset_seconds
;
256 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
257 ret
= tv_diff(&rstime
, &sss
, &rskip
);
258 if (ret
> 0) { /* audiod was started in the middle of the stream */
259 tv_add(&wtime
, &rskip
, &sum
);
260 seconds
+= sum
.tv_sec
;
262 seconds
+= wtime
.tv_sec
;
264 seconds
= PARA_MIN(seconds
, length
);
265 seconds
= PARA_MAX(seconds
, 0);
267 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
271 (length
- seconds
) / 60,
272 (length
- seconds
) % 60,
273 length
? (seconds
* 100 + length
/ 2) / length
: 0,
277 PARA_DEBUG_LOG("slot %d: %s\n", slot_num
, msg
);
280 return para_strdup(NULL
);
283 static int want_colors(void)
285 if (conf
.color_arg
== color_arg_no
)
287 if (conf
.color_arg
== color_arg_yes
)
289 if (conf
.logfile_given
)
291 return isatty(STDERR_FILENO
);
294 static void parse_config_or_die(void)
298 struct audiod_cmdline_parser_params params
= {
302 .check_ambiguity
= 0,
306 if (conf
.config_file_given
)
307 config_file
= para_strdup(conf
.config_file_arg
);
309 char *home
= para_homedir();
310 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
313 ret
= file_exists(config_file
);
314 if (conf
.config_file_given
&& !ret
) {
315 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
319 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
321 daemon_set_loglevel(conf
.loglevel_arg
);
328 static void setup_signal_handling(void)
330 sig_task
->fd
= para_signal_init();
331 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
332 para_install_sighandler(SIGINT
);
333 para_install_sighandler(SIGTERM
);
334 para_install_sighandler(SIGHUP
);
335 para_sigaction(SIGPIPE
, SIG_IGN
);
338 static void clear_slot(int slot_num
)
340 struct slot_info
*s
= &slot
[slot_num
];
342 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
343 memset(s
, 0, sizeof(struct slot_info
));
347 static void close_receiver(int slot_num
)
349 struct slot_info
*s
= &slot
[slot_num
];
350 struct audio_format_info
*a
;
352 if (s
->format
< 0 || !s
->receiver_node
)
355 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
356 audio_formats
[s
->format
], slot_num
);
357 a
->receiver
->close(s
->receiver_node
);
358 btr_free_node(s
->receiver_node
->btrn
);
359 free(s
->receiver_node
);
360 s
->receiver_node
= NULL
;
361 tv_add(now
, &(struct timeval
)EMBRACE(0, 200 * 1000),
362 &a
->restart_barrier
);
365 static void writer_cleanup(struct writer_node
*wn
)
371 w
= writers
+ wn
->writer_num
;
372 PARA_INFO_LOG("closing %s\n", writer_names
[wn
->writer_num
]);
374 btr_free_node(wn
->btrn
);
377 static void close_writers(struct slot_info
*s
)
379 struct audio_format_info
*a
;
386 if (a
->num_writers
== 0)
387 writer_cleanup(s
->wns
);
389 for (i
= 0; i
< a
->num_writers
; i
++)
390 writer_cleanup(s
->wns
+ i
);
396 static void close_filters(struct slot_info
*s
)
399 struct audio_format_info
*a
= afi
+ s
->format
;
400 if (a
->num_filters
== 0)
402 for (i
= 0; i
< a
->num_filters
; i
++) {
403 struct filter_node
*fn
= s
->fns
+ i
;
408 f
= filters
+ fn
->filter_num
;
411 btr_free_node(fn
->btrn
);
418 * Whenever a task commits suicide by returning from post_select with t->error
419 * < 0, it also removes its btr node. We do exactly that to kill a running
420 * task. Note that the scheduler checks t->error also _before_ each pre/post
421 * select call, so the victim will never be scheduled again.
423 static void kill_btrn(struct btr_node
*btrn
, struct task
*t
, int error
)
428 btr_remove_node(btrn
);
431 static void kill_all_decoders(int error
)
436 struct slot_info
*s
= &slot
[i
];
437 struct audio_format_info
*a
;
442 for (j
= 0; j
< a
->num_writers
; j
++)
443 kill_btrn(s
->wns
[j
].btrn
, &s
->wns
[j
].task
, error
);
445 for (j
= 0; j
< a
->num_writers
; j
++)
446 kill_btrn(s
->fns
[j
].btrn
, &s
->wns
[j
].task
, error
);
447 if (s
->receiver_node
)
448 kill_btrn(s
->receiver_node
->btrn
, &s
->receiver_node
->task
,
453 static int get_empty_slot(void)
464 if (s
->wns
|| s
->receiver_node
|| s
->fns
)
469 return -E_NO_MORE_SLOTS
;
472 static void open_filters(struct slot_info
*s
)
474 struct audio_format_info
*a
= afi
+ s
->format
;
475 struct filter_node
*fn
;
476 int nf
= a
->num_filters
;
477 struct btr_node
*parent
;
482 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
483 assert(s
->fns
== NULL
);
484 s
->fns
= para_calloc(nf
* sizeof(struct filter_node
));
485 parent
= s
->receiver_node
->btrn
;
486 for (i
= 0; i
< nf
; i
++) {
487 struct filter
*f
= filters
+ a
->filter_nums
[i
];
489 fn
->filter_num
= a
->filter_nums
[i
];
490 fn
->conf
= a
->filter_conf
[i
];
491 fn
->task
.pre_select
= f
->pre_select
;
492 fn
->task
.post_select
= f
->post_select
;
494 fn
->btrn
= btr_new_node(&(struct btr_node_description
)
495 EMBRACE(.name
= f
->name
, .parent
= parent
,
496 .handler
= f
->execute
, .context
= fn
));
499 register_task(&fn
->task
);
501 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
502 audio_formats
[s
->format
], i
, nf
, f
->name
, (int)(s
- slot
));
503 sprintf(fn
->task
.status
, "%s (slot %d)", f
->name
, (int)(s
- slot
));
507 static void open_writers(struct slot_info
*s
)
510 struct audio_format_info
*a
= afi
+ s
->format
;
511 struct writer_node
*wn
;
512 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
514 assert(s
->wns
== NULL
);
515 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
516 * sizeof(struct writer_node
));
517 if (a
->num_writers
== 0)
518 setup_writer_node(NULL
, parent
, s
->wns
);
520 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
521 for (i
= 0; i
< a
->num_writers
; i
++) {
523 wn
->conf
= a
->writer_conf
[i
];
524 wn
->writer_num
= a
->writer_nums
[i
];
525 register_writer_node(wn
, parent
);
530 /* returns slot num on success */
531 static int open_receiver(int format
)
533 struct audio_format_info
*a
= &afi
[format
];
536 struct receiver
*r
= a
->receiver
;
537 struct receiver_node
*rn
;
539 tv_add(now
, &(struct timeval
)EMBRACE(2, 0), &a
->restart_barrier
);
540 ret
= get_empty_slot();
544 rn
= para_calloc(sizeof(*rn
));
546 rn
->conf
= a
->receiver_conf
;
547 rn
->btrn
= btr_new_node(&(struct btr_node_description
)
548 EMBRACE(.name
= r
->name
, .context
= rn
));
551 btr_free_node(rn
->btrn
);
557 s
->receiver_node
= rn
;
558 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
559 audio_formats
[format
], r
->name
, slot_num
);
560 rn
->task
.pre_select
= r
->pre_select
;
561 rn
->task
.post_select
= r
->post_select
;
562 sprintf(rn
->task
.status
, "%s receiver node", r
->name
);
563 register_task(&rn
->task
);
567 static bool receiver_running(void)
570 long unsigned ss1
= stat_task
->server_stream_start
.tv_sec
;
573 struct slot_info
*s
= &slot
[i
];
574 long unsigned ss2
= s
->server_stream_start
.tv_sec
;
576 if (!s
->receiver_node
)
578 if (s
->receiver_node
->task
.error
>= 0)
587 * Return the root node of the current buffer tree.
589 * This is only used for stream grabbing.
591 * \return \p NULL if no slot is currently active. If more than one buffer tree
592 * exists, the node corresponding to the most recently started receiver is
595 struct btr_node
*audiod_get_btr_root(void)
597 int i
, newest_slot
= -1;
598 struct timeval newest_rstime
= {0, 0};
601 struct slot_info
*s
= &slot
[i
];
602 struct timeval rstime
;
603 if (!s
->receiver_node
)
605 if (s
->receiver_node
->task
.error
< 0)
607 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
608 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
610 newest_rstime
= rstime
;
613 if (newest_slot
== -1)
615 return slot
[newest_slot
].receiver_node
->btrn
;
618 /* whether a new instance of a decoder should be started. */
619 static bool must_start_decoder(void)
621 int cafn
= stat_task
->current_audio_format_num
;
622 unsigned vs
= stat_task
->vss_status
;
624 if (audiod_status
!= AUDIOD_ON
)
630 if (vs
& VSS_STATUS_FLAG_NEXT
)
632 if (!(vs
& VSS_STATUS_FLAG_PLAYING
))
634 if (receiver_running())
636 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, NULL
) < 0)
641 static unsigned compute_time_diff(const struct timeval
*status_time
)
643 struct timeval tmp
, diff
;
644 static unsigned count
;
645 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
646 const struct timeval max_deviation
= {0, 500 * 1000};
647 const int time_smooth
= 5;
651 sign
= tv_diff(status_time
, now
, &diff
);
652 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
653 // sign, sa_time_diff_sign);
655 sa_time_diff_sign
= sign
;
656 stat_task
->sa_time_diff
= diff
;
661 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
662 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
663 PARA_WARNING_LOG("time diff jump: %lims\n",
667 sa_time_diff_sign
= tv_convex_combination(
668 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
669 count
> 10? sign
: sign
* time_smooth
, &diff
,
671 stat_task
->sa_time_diff
= tmp
;
672 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
675 sa_time_diff_sign
< 0? "-" : "+",
676 tv2ms(&stat_task
->sa_time_diff
)
679 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
683 static int update_item(int itemnum
, char *buf
)
685 long unsigned sec
, usec
;
687 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
689 free(stat_item_values
[itemnum
]);
690 stat_item_values
[itemnum
] = para_strdup(buf
);
691 stat_client_write_item(itemnum
);
693 case SI_STATUS_FLAGS
:
694 stat_task
->vss_status
= 0;
695 if (strchr(buf
, 'N'))
696 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
697 if (strchr(buf
, 'P'))
698 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
701 stat_task
->offset_seconds
= atoi(buf
);
703 case SI_SECONDS_TOTAL
:
704 stat_task
->length_seconds
= atoi(buf
);
706 case SI_STREAM_START
:
707 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
708 stat_task
->server_stream_start
.tv_sec
= sec
;
709 stat_task
->server_stream_start
.tv_usec
= usec
;
712 case SI_CURRENT_TIME
:
713 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
714 struct timeval tv
= {sec
, usec
};
715 compute_time_diff(&tv
);
719 stat_task
->current_audio_format_num
720 = get_audio_format_num(buf
);
725 static int parse_stream_command(const char *txt
, char **cmd
)
727 char *p
= strchr(txt
, ':');
731 return -E_MISSING_COLON
;
733 FOR_EACH_AUDIO_FORMAT(i
) {
734 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
739 return -E_UNSUPPORTED_AUDIO_FORMAT
;
742 static int add_filter(int format
, char *cmdline
)
744 struct audio_format_info
*a
= &afi
[format
];
745 int filter_num
, nf
= a
->num_filters
;
747 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
750 a
->filter_nums
[nf
] = filter_num
;
752 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
753 filters
[filter_num
].name
);
757 static int parse_writer_args(void)
761 struct audio_format_info
*a
;
763 nw
= PARA_MAX(1U, conf
.writer_given
);
764 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
765 FOR_EACH_AUDIO_FORMAT(i
) {
767 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
768 a
->writer_nums
= para_malloc(nw
* sizeof(int));
771 for (i
= 0; i
< conf
.writer_given
; i
++) {
774 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
779 wconf
= check_writer_arg(cmd
, &writer_num
);
784 a
->writer_nums
[nw
] = writer_num
;
785 a
->writer_conf
[nw
] = wconf
;
786 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
787 nw
, writer_names
[writer_num
]);
795 static int parse_receiver_args(void)
797 int i
, ret
, receiver_num
;
799 struct audio_format_info
*a
;
801 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
802 char *arg
= conf
.receiver_arg
[i
];
803 char *recv_arg
= strchr(arg
, ':');
804 ret
= -E_MISSING_COLON
;
809 ret
= get_audio_format_num(arg
);
813 * If multiple receivers are given for this audio format, the
814 * last one wins and we have to free the previous receiver
815 * config here. Since we are iterating backwards, the winning
816 * receiver arg is in fact the first one given.
818 if (afi
[ret
].receiver_conf
)
819 afi
[ret
].receiver
->free_config(afi
[ret
].receiver_conf
);
820 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
821 if (!afi
[ret
].receiver_conf
) {
822 ret
= -E_RECV_SYNTAX
;
825 afi
[ret
].receiver
= &receivers
[receiver_num
];
828 * Use the first available receiver with no arguments for those audio
829 * formats for which no receiver was specified.
831 cmd
= para_strdup(receivers
[0].name
);
832 FOR_EACH_AUDIO_FORMAT(i
) {
834 if (a
->receiver_conf
)
836 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
837 if (!a
->receiver_conf
)
838 return -E_RECV_SYNTAX
;
839 a
->receiver
= &receivers
[receiver_num
];
847 static int init_default_filters(void)
851 FOR_EACH_AUDIO_FORMAT(i
) {
852 struct audio_format_info
*a
= &afi
[i
];
857 continue; /* no default -- nothing to to */
859 * If udp is used to receive this audiod format, add fecdec as
862 if (strcmp(afi
[i
].receiver
->name
, "udp") == 0 ||
863 strcmp(afi
[i
].receiver
->name
, "dccp") == 0) {
864 tmp
= para_strdup("fecdec");
870 /* add "dec" to audio format name */
871 tmp
= make_message("%sdec", audio_formats
[i
]);
872 for (j
= 0; filters
[j
].name
; j
++)
873 if (!strcmp(tmp
, filters
[j
].name
))
876 ret
= -E_UNSUPPORTED_FILTER
;
877 if (!filters
[j
].name
)
879 tmp
= para_strdup(filters
[j
].name
);
880 ret
= add_filter(i
, tmp
);
884 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
891 static int parse_filter_args(void)
895 nf
= PARA_MAX(2U, conf
.filter_given
);
896 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
897 FOR_EACH_AUDIO_FORMAT(i
) {
898 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
899 afi
[i
].filter_nums
= para_malloc(nf
* sizeof(unsigned));
901 if (!conf
.no_default_filters_given
)
902 return init_default_filters();
903 for (i
= 0; i
< conf
.filter_given
; i
++) {
904 char *arg
= conf
.filter_arg
[i
];
905 char *filter_name
= strchr(arg
, ':');
906 ret
= -E_MISSING_COLON
;
911 ret
= get_audio_format_num(arg
);
914 ret
= add_filter(ret
, filter_name
);
918 ret
= init_default_filters(); /* use default values for the rest */
923 static int parse_stream_args(void)
927 ret
= parse_receiver_args();
930 ret
= parse_filter_args();
933 ret
= parse_writer_args();
939 /* does not unlink socket on errors */
940 static int audiod_get_socket(void)
942 struct sockaddr_un unix_addr
;
945 if (conf
.socket_given
)
946 socket_name
= para_strdup(conf
.socket_arg
);
948 char *hn
= para_hostname();
949 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
953 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
954 if (conf
.force_given
)
956 ret
= create_local_socket(socket_name
, &unix_addr
,
957 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
961 if (listen(fd
, 5) < 0) {
962 ret
= -ERRNO_TO_PARA_ERROR(errno
);
965 ret
= mark_fd_nonblocking(fd
);
970 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
974 static void signal_pre_select(struct sched
*s
, struct task
*t
)
976 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
977 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
980 static void signal_post_select(struct sched
*s
, __a_unused
struct task
*t
)
984 signum
= para_next_signal(&s
->rfds
);
989 PARA_EMERG_LOG("terminating on signal %d\n", signum
);
990 clean_exit(EXIT_FAILURE
, "caught deadly signal");
994 static void signal_setup_default(struct signal_task
*st
)
996 st
->task
.pre_select
= signal_pre_select
;
997 st
->task
.post_select
= signal_post_select
;
998 sprintf(st
->task
.status
, "signal task");
1001 static void command_pre_select(struct sched
*s
, struct task
*t
)
1003 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1004 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1007 static void command_post_select(struct sched
*s
, struct task
*t
)
1010 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
1011 static struct timeval last_status_dump
;
1012 struct timeval tmp
, delay
= {0, 500 * 1000};
1014 tv_add(&last_status_dump
, &delay
, &tmp
);
1015 if (tv_diff(&tmp
, now
, NULL
) < 0) {
1016 audiod_status_dump();
1017 last_status_dump
= *now
;
1020 ret
= handle_connect(ct
->fd
, &s
->rfds
);
1022 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1023 audiod_status_dump();
1026 static void init_command_task(struct command_task
*ct
)
1028 ct
->task
.pre_select
= command_pre_select
;
1029 ct
->task
.post_select
= command_post_select
;
1031 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1032 sprintf(ct
->task
.status
, "command task");
1035 static void close_stat_pipe(void)
1039 btr_free_node(stat_task
->ct
->btrn
);
1040 client_close(stat_task
->ct
);
1041 stat_task
->ct
= NULL
;
1042 clear_and_dump_items();
1043 stat_task
->length_seconds
= 0;
1044 stat_task
->offset_seconds
= 0;
1045 stat_task
->vss_status
= 0;
1046 stat_task
->current_audio_format_num
= -1;
1047 audiod_status_dump();
1051 * close the connection to para_server and exit
1053 * \param status the exit status which is passed to exit(3)
1054 * \param msg the log message
1056 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1057 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1062 void __noreturn
clean_exit(int status
, const char *msg
)
1064 PARA_EMERG_LOG("%s\n", msg
);
1066 unlink(socket_name
);
1071 /* avoid busy loop if server is down */
1072 static void set_stat_task_restart_barrier(unsigned seconds
)
1074 struct timeval delay
= {seconds
, 0};
1075 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1078 static void try_to_close_slot(int slot_num
)
1080 struct slot_info
*s
= &slot
[slot_num
];
1081 struct audio_format_info
*a
= afi
+ s
->format
;
1086 if (s
->receiver_node
&& s
->receiver_node
->task
.error
!= -E_TASK_UNREGISTERED
)
1088 for (i
= 0; i
< a
->num_filters
; i
++)
1089 if (s
->fns
&& s
->fns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1091 if (a
->num_writers
> 0) {
1092 for (i
= 0; i
< a
->num_writers
; i
++)
1093 if (s
->wns
&& s
->wns
[i
].task
.error
!= -E_TASK_UNREGISTERED
)
1096 if (s
->wns
&& s
->wns
[0].task
.error
!= -E_TASK_UNREGISTERED
)
1099 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1102 close_receiver(slot_num
);
1103 clear_slot(slot_num
);
1107 * Check if any receivers/filters/writers need to be started and do so if
1110 static void start_stop_decoders(void)
1113 struct slot_info
*sl
;
1114 struct audio_format_info
*a
;
1117 try_to_close_slot(i
);
1118 if (audiod_status
!= AUDIOD_ON
||
1119 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1120 return kill_all_decoders(-E_NOT_PLAYING
);
1121 if (!must_start_decoder())
1123 ret
= open_receiver(stat_task
->current_audio_format_num
);
1125 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1129 a
= afi
+ sl
->format
;
1133 activate_grab_clients();
1134 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1137 static void status_pre_select(struct sched
*s
, struct task
*t
)
1139 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1140 int ret
, cafn
= stat_task
->current_audio_format_num
;
1142 if (must_start_decoder())
1144 ret
= btr_node_status(st
->btrn
, 0, BTR_NT_LEAF
);
1147 if (st
->ct
&& audiod_status
== AUDIOD_OFF
)
1149 if (!st
->ct
&& audiod_status
!= AUDIOD_OFF
)
1150 sched_request_barrier_or_min_delay(&st
->restart_barrier
, s
);
1152 sched_request_barrier(&afi
[cafn
].restart_barrier
, s
);
1154 * If para_server is playing we'd like to have a smooth time display
1155 * even if we are running in standby mode. So we request a timeout that
1156 * expires at the next full second.
1158 if (stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)
1159 sched_request_timeout_ms(1000 - now
->tv_usec
/ 1000, s
);
1165 /* restart the client task if necessary */
1166 static void status_post_select(__a_unused
struct sched
*s
, struct task
*t
)
1168 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1170 if (audiod_status
== AUDIOD_OFF
) {
1173 if (st
->ct
->task
.error
>= 0) {
1174 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, -E_AUDIOD_OFF
);
1177 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1180 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1187 if (st
->ct
->task
.error
< 0) {
1188 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1193 if (st
->ct
->status
!= CL_RECEIVING
)
1195 ret
= btr_node_status(st
->btrn
, st
->min_iqs
, BTR_NT_LEAF
);
1197 struct timeval diff
;
1198 tv_diff(now
, &st
->last_status_read
, &diff
);
1199 if (diff
.tv_sec
> 61)
1200 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
,
1204 btr_merge(st
->btrn
, st
->min_iqs
);
1205 sz
= btr_next_buffer(st
->btrn
, &buf
);
1206 ret
= for_each_stat_item(buf
, sz
, update_item
);
1208 kill_btrn(st
->ct
->btrn
, &st
->ct
->task
, ret
);
1212 btr_consume(st
->btrn
, sz
- ret
);
1213 st
->last_status_read
= *now
;
1215 } else /* current status item crosses buffers */
1216 st
->min_iqs
= sz
+ 1;
1219 btr_drain(st
->btrn
);
1220 st
->current_audio_format_num
= -1;
1221 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1223 if (st
->clock_diff_count
) { /* get status only one time */
1224 char *argv
[] = {"audiod", "--", "stat", "-p", "-n=1", NULL
};
1226 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1227 st
->clock_diff_count
--;
1228 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1229 set_stat_task_restart_barrier(2);
1232 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1234 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
);
1235 set_stat_task_restart_barrier(5);
1237 free(stat_item_values
[SI_BASENAME
]);
1238 stat_item_values
[SI_BASENAME
] = para_strdup(
1239 "no connection to para_server");
1240 stat_client_write_item(SI_BASENAME
);
1241 st
->last_status_read
= *now
;
1243 start_stop_decoders();
1246 static void init_status_task(struct status_task
*st
)
1248 memset(st
, 0, sizeof(struct status_task
));
1249 st
->task
.pre_select
= status_pre_select
;
1250 st
->task
.post_select
= status_post_select
;
1251 st
->sa_time_diff_sign
= 1;
1252 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1253 st
->current_audio_format_num
= -1;
1254 sprintf(st
->task
.status
, "stat");
1255 st
->btrn
= btr_new_node(&(struct btr_node_description
)
1256 EMBRACE(.name
= "stat"));
1259 static void set_initial_status(void)
1261 audiod_status
= AUDIOD_ON
;
1262 if (!conf
.mode_given
)
1264 if (!strcmp(conf
.mode_arg
, "sb")) {
1265 audiod_status
= AUDIOD_STANDBY
;
1268 if (!strcmp(conf
.mode_arg
, "off")) {
1269 audiod_status
= AUDIOD_OFF
;
1272 if (strcmp(conf
.mode_arg
, "on"))
1273 PARA_WARNING_LOG("invalid mode\n");
1276 __noreturn
static void print_help_and_die(void)
1278 int d
= conf
.detailed_help_given
;
1279 const char **p
= d
? audiod_args_info_detailed_help
1280 : audiod_args_info_help
;
1282 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1283 AUDIOD_CMDLINE_PARSER_VERSION
);
1284 printf_or_die("%s\n\n", audiod_args_info_usage
);
1286 printf_or_die("%s\n", *p
);
1287 print_receiver_helps(d
);
1288 print_filter_helps(d
);
1289 print_writer_helps(d
);
1293 static void init_colors_or_die(void)
1299 daemon_set_default_log_colors();
1300 daemon_set_flag(DF_COLOR_LOG
);
1301 for (i
= 0; i
< conf
.log_color_given
; i
++)
1302 daemon_set_log_color_or_die(conf
.log_color_arg
[i
]);
1306 * the main function of para_audiod
1308 * \param argc usual argument count
1309 * \param argv usual argument vector
1311 * \return EXIT_SUCCESS or EXIT_FAILURE
1313 * \sa para_audiod(1)
1315 int main(int argc
, char *argv
[])
1318 static struct sched s
;
1319 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1320 struct audiod_cmdline_parser_params params
= {
1323 .check_required
= 0,
1324 .check_ambiguity
= 0,
1329 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1331 HANDLE_VERSION_FLAG("audiod", conf
);
1332 /* init receivers/filters/writers early to make help work */
1336 if (conf
.help_given
|| conf
.detailed_help_given
)
1337 print_help_and_die();
1338 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1339 parse_config_or_die();
1340 init_colors_or_die();
1341 init_random_seed_or_die();
1342 daemon_set_flag(DF_LOG_TIME
);
1343 daemon_set_flag(DF_LOG_HOSTNAME
);
1344 daemon_set_flag(DF_LOG_LL
);
1345 if (conf
.log_timing_given
)
1346 daemon_set_flag(DF_LOG_TIMING
);
1347 if (conf
.logfile_given
) {
1348 daemon_set_logfile(conf
.logfile_arg
);
1349 daemon_open_log_or_die();
1351 ret
= parse_stream_args();
1353 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1356 log_welcome("para_audiod");
1357 server_uptime(UPTIME_SET
);
1358 set_initial_status();
1361 setup_signal_handling();
1362 signal_setup_default(sig_task
);
1364 init_status_task(stat_task
);
1365 init_command_task(cmd_task
);
1367 if (conf
.daemon_given
)
1370 register_task(&sig_task
->task
);
1371 register_task(&cmd_task
->task
);
1372 register_task(&stat_task
->task
);
1373 s
.default_timeout
.tv_sec
= 2;
1374 s
.default_timeout
.tv_usec
= 999 * 1000;
1377 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1378 return EXIT_FAILURE
;