2 * Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>
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};
96 /* The task for obtaining para_server's status (para_client stat). */
98 /** The associated task structure of audiod. */
100 /** Client data associated with the stat task. */
101 struct client_task
*ct
;
102 /** Do not restart client command until this time. */
103 struct timeval restart_barrier
;
104 /** Last time we received status data from para_server. */
105 struct timeval last_status_read
;
107 /** The offset value announced by para_server. */
109 /** The length of the current audio file as announced by para_server. */
111 /** The start of the current stream from the view of para_server. */
112 struct timeval server_stream_start
;
113 /** The average time deviation between para_server and para_audiod. */
114 struct timeval sa_time_diff
;
115 /** Whether client time is ahead of server time. */
116 int sa_time_diff_sign
;
117 /** The 'P' and the 'N' flags as announced by para_server. */
118 enum vss_status_flags vss_status
;
119 /** Number of times the clock difference is to be checked. */
120 unsigned clock_diff_count
;
121 /** When to start the next check for clock difference. */
122 struct timeval clock_diff_barrier
;
123 /** Number of the audio format as announced by para_server. */
124 int current_audio_format_num
;
125 /* The status task btrn is the child of the client task. */
126 struct btr_node
*btrn
;
129 /** The array of status items sent by para_server. */
130 char *stat_item_values
[NUM_STAT_ITEMS
] = {NULL
};
133 * the current mode of operation of which can be changed by the on/off/cycle
134 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
136 int audiod_status
= AUDIOD_ON
;
139 * the gengetopt args_info struct that holds information on all command line
142 struct audiod_args_info conf
;
144 static char *socket_name
;
145 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
147 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
149 static struct status_task status_task_struct
;
152 * the task that calls the status command of para_server
154 * \sa struct status_task
156 static struct status_task
*stat_task
= &status_task_struct
;
159 * the task for handling audiod commands
161 * \sa struct task, struct sched
163 struct command_task
{
164 /** the local listening socket */
166 /** the associated task structure */
170 /** iterate over all supported audio formats */
171 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
174 * Get the audio format number.
176 * \param name The name of the audio format.
178 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
179 * \a name is not a supported audio format.
181 static int get_audio_format_num(const char *name
)
185 while (para_isspace(*name
))
187 FOR_EACH_AUDIO_FORMAT(i
)
188 if (!strcmp(name
, audio_formats
[i
]))
190 return -E_UNSUPPORTED_AUDIO_FORMAT
;
193 static int get_matching_audio_format_nums(const char *re
)
198 ret
= para_regcomp(&preg
, re
, REG_EXTENDED
| REG_NOSUB
);
202 FOR_EACH_AUDIO_FORMAT(i
)
203 if (regexec(&preg
, audio_formats
[i
], 0, NULL
, 0) != REG_NOMATCH
)
210 * Compute the play time based on information of the given slot.
212 * \param slot_num The slot number (negative means: no slot).
214 * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
215 * from the status items received from para_server and the start time of the
216 * (first) writer of the given slot.
218 * It has to take into account that the stream was probably not started at
219 * the beginning of the file, that the clock between the server and the client
220 * host may differ and that playback of the stream was delayed, e.g. because
221 * the prebuffer filter is used in the filter configuration of the given slot.
223 * If no writer is active in the given slot, or \a slot_num is negative
224 * (indicating that para_audiod runs in standby mode), an approximation based
225 * only on the status items is computed and the returned string is prefixed
228 * \return A string that must be freed by the caller.
230 char *get_time_string(int slot_num
)
232 int ret
, seconds
= 0, length
;
233 struct timeval
*tmp
, sum
, sss
, /* server stream start */
234 rstime
, /* receiver start time */
235 wstime
, /* writer start time */
236 wtime
, /* now - writer start */
237 rskip
; /* receiver start - sss */
238 struct slot_info
*s
= slot_num
< 0? NULL
: &slot
[slot_num
];
241 if (audiod_status
== AUDIOD_OFF
)
243 if (!(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)) {
244 if (stat_task
->length_seconds
) /* paused */
246 goto empty
; /* stopped */
248 if (audiod_status
== AUDIOD_ON
&& !s
)
251 * Valid status items and playing, set length and tmp to the stream
252 * start. We use the slot info and fall back to the info from current
253 * status items if no slot info is available.
255 length
= stat_task
->length_seconds
;
256 tmp
= &stat_task
->server_stream_start
;
257 if (s
&& s
->wns
&& s
->wns
[0].btrn
) { /* writer active in this slot */
258 btr_get_node_start(s
->wns
[0].btrn
, &wstime
);
259 if (wstime
.tv_sec
!= 0) { /* writer wrote something */
260 if (s
->server_stream_start
.tv_sec
== 0) {
261 /* copy status info to slot */
262 s
->server_stream_start
= stat_task
->server_stream_start
;
263 s
->offset_seconds
= stat_task
->offset_seconds
;
264 s
->seconds_total
= stat_task
->length_seconds
;
266 length
= s
->seconds_total
;
267 tmp
= &s
->server_stream_start
;
270 if (stat_task
->sa_time_diff_sign
> 0)
271 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
273 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
274 if (!s
|| !s
->wns
|| !s
->wns
[0].btrn
) {
276 tv_diff(now
, &sss
, &diff
);
277 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
280 tv_diff(now
, &wstime
, &wtime
);
281 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
282 seconds
= s
->offset_seconds
;
283 if (s
->receiver_node
->btrn
) {
284 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
285 ret
= tv_diff(&rstime
, &sss
, &rskip
);
286 if (ret
> 0) { /* audiod was started in the middle of the stream */
287 tv_add(&wtime
, &rskip
, &sum
);
288 seconds
+= sum
.tv_sec
;
290 seconds
+= wtime
.tv_sec
;
292 seconds
+= wtime
.tv_sec
;
294 seconds
= PARA_MIN(seconds
, length
);
295 seconds
= PARA_MAX(seconds
, 0);
297 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
301 (length
- seconds
) / 60,
302 (length
- seconds
) % 60,
303 length
? (seconds
* 100 + length
/ 2) / length
: 0,
307 //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
310 return para_strdup(NULL
);
313 static int want_colors(void)
315 if (conf
.color_arg
== color_arg_no
)
317 if (conf
.color_arg
== color_arg_yes
)
319 if (conf
.logfile_given
)
321 return isatty(STDERR_FILENO
);
324 static void parse_config_or_die(void)
328 struct audiod_cmdline_parser_params params
= {
332 .check_ambiguity
= 0,
336 if (conf
.config_file_given
)
337 config_file
= para_strdup(conf
.config_file_arg
);
339 char *home
= para_homedir();
340 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
343 ret
= file_exists(config_file
);
344 if (conf
.config_file_given
&& !ret
) {
345 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
349 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
350 daemon_set_loglevel(conf
.loglevel_arg
);
359 static void setup_signal_handling(void)
361 sig_task
->fd
= para_signal_init();
362 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
363 para_install_sighandler(SIGINT
);
364 para_install_sighandler(SIGTERM
);
365 para_install_sighandler(SIGHUP
);
366 para_sigaction(SIGPIPE
, SIG_IGN
);
369 static void clear_slot(int slot_num
)
371 struct slot_info
*s
= &slot
[slot_num
];
373 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
374 memset(s
, 0, sizeof(struct slot_info
));
378 static void close_receiver(int slot_num
)
380 struct slot_info
*s
= &slot
[slot_num
];
381 struct audio_format_info
*a
;
383 if (s
->format
< 0 || !s
->receiver_node
)
386 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
387 audio_formats
[s
->format
], slot_num
);
388 a
->receiver
->close(s
->receiver_node
);
389 btr_remove_node(&s
->receiver_node
->btrn
);
390 task_reap(&s
->receiver_node
->task
);
391 free(s
->receiver_node
);
392 s
->receiver_node
= NULL
;
393 stat_task
->current_audio_format_num
= -1;
394 tv_add(now
, &(struct timeval
)EMBRACE(0, 200 * 1000),
395 &a
->restart_barrier
);
398 static void writer_cleanup(struct writer_node
*wn
)
404 w
= writers
+ wn
->writer_num
;
405 PARA_INFO_LOG("closing %s\n", writer_names
[wn
->writer_num
]);
407 btr_remove_node(&wn
->btrn
);
408 task_reap(&wn
->task
);
411 static void close_writers(struct slot_info
*s
)
413 struct audio_format_info
*a
;
420 if (a
->num_writers
== 0)
421 writer_cleanup(s
->wns
);
423 for (i
= 0; i
< a
->num_writers
; i
++)
424 writer_cleanup(s
->wns
+ i
);
430 static void close_filters(struct slot_info
*s
)
433 struct audio_format_info
*a
= afi
+ s
->format
;
434 if (a
->num_filters
== 0)
436 for (i
= a
->num_filters
- 1; i
>= 0; i
--) {
437 struct filter_node
*fn
= s
->fns
+ i
;
442 f
= filters
+ fn
->filter_num
;
445 btr_remove_node(&fn
->btrn
);
446 task_reap(&fn
->task
);
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
++) {
501 struct filter
*f
= filters
+ a
->filter_nums
[i
];
503 fn
->filter_num
= a
->filter_nums
[i
];
504 fn
->conf
= a
->filter_conf
[i
];
505 fn
->btrn
= btr_new_node(&(struct btr_node_description
)
506 EMBRACE(.name
= f
->name
, .parent
= parent
,
507 .handler
= f
->execute
, .context
= fn
));
510 sprintf(buf
, "%s (slot %d)", f
->name
, (int)(s
- slot
));
511 fn
->task
= task_register(&(struct task_info
) {
513 .pre_select
= f
->pre_select
,
514 .post_select
= f
->post_select
,
518 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
519 audio_formats
[s
->format
], i
, nf
, f
->name
, (int)(s
- slot
));
523 static void open_writers(struct slot_info
*s
)
526 struct audio_format_info
*a
= afi
+ s
->format
;
527 struct writer_node
*wn
;
528 struct btr_node
*parent
= s
->fns
[a
->num_filters
- 1].btrn
;
530 assert(s
->wns
== NULL
);
531 s
->wns
= para_calloc(PARA_MAX(1U, a
->num_writers
)
532 * sizeof(struct writer_node
));
533 for (i
= 0; i
< a
->num_writers
; i
++) {
535 wn
->conf
= a
->writer_conf
[i
];
536 wn
->writer_num
= a
->writer_nums
[i
];
537 register_writer_node(wn
, parent
, &sched
);
538 PARA_NOTICE_LOG("%s writer started in slot %d\n",
539 writer_names
[a
->writer_nums
[i
]], (int)(s
- slot
));
543 /* returns slot num on success */
544 static int open_receiver(int format
)
546 struct audio_format_info
*a
= &afi
[format
];
549 struct receiver
*r
= a
->receiver
;
550 struct receiver_node
*rn
;
552 tv_add(now
, &(struct timeval
)EMBRACE(2, 0), &a
->restart_barrier
);
553 ret
= get_empty_slot();
557 rn
= para_calloc(sizeof(*rn
));
559 rn
->conf
= a
->receiver_conf
;
560 rn
->btrn
= btr_new_node(&(struct btr_node_description
)
561 EMBRACE(.name
= r
->name
, .context
= rn
));
564 btr_remove_node(&rn
->btrn
);
570 s
->receiver_node
= rn
;
571 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
572 audio_formats
[format
], r
->name
, slot_num
);
573 rn
->task
= task_register(&(struct task_info
) {
575 .pre_select
= r
->pre_select
,
576 .post_select
= r
->post_select
,
582 static bool receiver_running(void)
585 long unsigned ss1
= stat_task
->server_stream_start
.tv_sec
;
588 struct slot_info
*s
= &slot
[i
];
589 long unsigned ss2
= s
->server_stream_start
.tv_sec
;
591 if (!s
->receiver_node
)
593 if (task_status(s
->receiver_node
->task
) >= 0)
602 * Return the root node of the current buffer tree.
604 * This is only used for stream grabbing.
606 * \return \p NULL if no slot is currently active. If more than one buffer tree
607 * exists, the node corresponding to the most recently started receiver is
610 struct btr_node
*audiod_get_btr_root(void)
612 int i
, newest_slot
= -1;
613 struct timeval newest_rstime
= {0, 0};
616 struct slot_info
*s
= &slot
[i
];
617 struct timeval rstime
;
618 if (!s
->receiver_node
)
620 if (task_status(s
->receiver_node
->task
) < 0)
622 btr_get_node_start(s
->receiver_node
->btrn
, &rstime
);
623 if (newest_slot
>= 0 && tv_diff(&rstime
, &newest_rstime
, NULL
) < 0)
625 newest_rstime
= rstime
;
628 if (newest_slot
== -1)
630 return slot
[newest_slot
].receiver_node
->btrn
;
633 /* whether a new instance of a decoder should be started. */
634 static bool must_start_decoder(void)
636 int cafn
= stat_task
->current_audio_format_num
;
637 unsigned vs
= stat_task
->vss_status
;
639 if (audiod_status
!= AUDIOD_ON
)
645 if (vs
& VSS_STATUS_FLAG_NEXT
)
647 if (!(vs
& VSS_STATUS_FLAG_PLAYING
))
649 if (receiver_running())
651 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, NULL
) < 0)
656 static void compute_time_diff(const struct timeval
*status_time
)
658 struct timeval tmp
, diff
;
659 static unsigned count
;
660 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
661 const struct timeval max_deviation
= {0, 500 * 1000};
662 const int time_smooth
= 5;
664 sign
= tv_diff(status_time
, now
, &diff
);
665 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
666 // sign, sa_time_diff_sign);
668 sa_time_diff_sign
= sign
;
669 stat_task
->sa_time_diff
= diff
;
674 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
675 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
676 PARA_WARNING_LOG("time diff jump: %lims\n",
680 sa_time_diff_sign
= tv_convex_combination(
681 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
682 count
> 10? sign
: sign
* time_smooth
, &diff
,
684 stat_task
->sa_time_diff
= tmp
;
685 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
688 sa_time_diff_sign
< 0? "-" : "+",
689 tv2ms(&stat_task
->sa_time_diff
)
692 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
695 static int update_item(int itemnum
, char *buf
)
697 long unsigned sec
, usec
;
699 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
701 free(stat_item_values
[itemnum
]);
702 stat_item_values
[itemnum
] = para_strdup(buf
);
703 stat_client_write_item(itemnum
);
705 case SI_STATUS_FLAGS
:
706 stat_task
->vss_status
= 0;
707 if (strchr(buf
, 'N'))
708 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
709 if (strchr(buf
, 'P'))
710 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
713 stat_task
->offset_seconds
= atoi(buf
);
715 case SI_SECONDS_TOTAL
:
716 stat_task
->length_seconds
= atoi(buf
);
718 case SI_STREAM_START
:
719 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
720 stat_task
->server_stream_start
.tv_sec
= sec
;
721 stat_task
->server_stream_start
.tv_usec
= usec
;
724 case SI_CURRENT_TIME
:
725 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
726 struct timeval tv
= {sec
, usec
};
727 compute_time_diff(&tv
);
731 stat_task
->current_audio_format_num
732 = get_audio_format_num(buf
);
737 static int parse_stream_command(const char *txt
, char **cmd
)
740 char *re
, *p
= strchr(txt
, ':');
743 return -E_MISSING_COLON
;
746 re
= malloc(len
+ 1);
747 strncpy(re
, txt
, len
);
749 ret
= get_matching_audio_format_nums(re
);
754 static int add_filter(int format
, char *cmdline
)
756 struct audio_format_info
*a
= &afi
[format
];
757 int filter_num
, nf
= a
->num_filters
;
760 filter_num
= check_filter_arg(cmdline
, &cfg
);
763 a
->filter_conf
= para_realloc(a
->filter_conf
,
764 (nf
+ 1) * sizeof(void *));
765 a
->filter_nums
= para_realloc(a
->filter_nums
,
766 (nf
+ 1) * sizeof(unsigned));
767 a
->filter_nums
[nf
] = filter_num
;
768 a
->filter_conf
[nf
] = cfg
;
770 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
771 filters
[filter_num
].name
);
775 static int parse_writer_args(void)
779 struct audio_format_info
*a
;
781 for (i
= 0; i
< conf
.writer_given
; i
++) {
783 int j
, nw
, writer_num
, af_mask
;
785 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
789 FOR_EACH_AUDIO_FORMAT(j
) {
791 if ((af_mask
& (1 << j
)) == 0) /* no match */
793 wconf
= check_writer_arg_or_die(cmd
, &writer_num
);
795 a
->writer_nums
= para_realloc(a
->writer_nums
, (nw
+ 1) * sizeof(int));
796 a
->writer_conf
= para_realloc(a
->writer_conf
, (nw
+ 1) * sizeof(void *));
797 a
->writer_nums
[nw
] = writer_num
;
798 a
->writer_conf
[nw
] = wconf
;
799 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[j
],
800 nw
, writer_names
[writer_num
]);
804 /* Use default writer for audio formats which are not yet set up. */
805 FOR_EACH_AUDIO_FORMAT(i
) {
809 if (a
->num_writers
> 0)
810 continue; /* already set up */
811 writer_conf
= check_writer_arg_or_die(NULL
, &writer_num
);
812 a
->writer_nums
= para_malloc(sizeof(int));
813 a
->writer_nums
[0] = writer_num
;
814 a
->writer_conf
= para_malloc(sizeof(void *));
815 a
->writer_conf
[0] = writer_conf
;
817 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats
[i
],
818 writer_names
[writer_num
]);
823 static int parse_receiver_args(void)
825 int i
, ret
, receiver_num
;
827 struct audio_format_info
*a
;
829 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
833 ret
= parse_stream_command(conf
.receiver_arg
[i
], &arg
);
837 FOR_EACH_AUDIO_FORMAT(j
) {
839 if ((af_mask
& (1 << j
)) == 0) /* no match */
842 * If multiple receivers are given for this audio format, the
843 * last one wins and we have to free the previous receiver
844 * config here. Since we are iterating backwards, the winning
845 * receiver arg is in fact the first one given.
847 if (a
->receiver_conf
)
848 a
->receiver
->free_config(a
->receiver_conf
);
849 a
->receiver_conf
= check_receiver_arg(arg
, &receiver_num
);
850 ret
= -E_RECV_SYNTAX
;
851 if (!a
->receiver_conf
)
853 a
->receiver
= receivers
+ receiver_num
;
857 * Use the first available receiver with no arguments for those audio
858 * formats for which no receiver was specified.
860 cmd
= para_strdup(receivers
[0].name
);
861 FOR_EACH_AUDIO_FORMAT(i
) {
863 if (a
->receiver_conf
)
865 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
866 if (!a
->receiver_conf
)
867 return -E_RECV_SYNTAX
;
868 a
->receiver
= &receivers
[receiver_num
];
870 FOR_EACH_AUDIO_FORMAT(i
) {
872 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
873 audio_formats
[i
], a
->receiver
->name
);
881 static int init_default_filters(void)
885 FOR_EACH_AUDIO_FORMAT(i
) {
886 struct audio_format_info
*a
= &afi
[i
];
891 continue; /* no default -- nothing to to */
893 * udp and dccp streams are fec-encoded, so add fecdec as the
896 if (strcmp(afi
[i
].receiver
->name
, "udp") == 0 ||
897 strcmp(afi
[i
].receiver
->name
, "dccp") == 0) {
898 tmp
= para_strdup("fecdec");
904 /* add "dec" to audio format name */
905 tmp
= make_message("%sdec", audio_formats
[i
]);
906 for (j
= 0; filters
[j
].name
; j
++)
907 if (!strcmp(tmp
, filters
[j
].name
))
910 ret
= -E_UNSUPPORTED_FILTER
;
911 if (!filters
[j
].name
)
913 tmp
= para_strdup(filters
[j
].name
);
914 ret
= add_filter(i
, tmp
);
918 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
925 static int parse_filter_args(void)
927 int i
, j
, ret
, af_mask
, num_matches
;
929 for (i
= 0; i
< conf
.filter_given
; i
++) {
931 ret
= parse_stream_command(conf
.filter_arg
[i
], &arg
);
936 FOR_EACH_AUDIO_FORMAT(j
) {
937 if ((af_mask
& (1 << j
)) == 0) /* no match */
939 ret
= add_filter(j
, arg
);
944 if (num_matches
== 0)
945 PARA_WARNING_LOG("ignoring filter spec: %s\n",
948 ret
= init_default_filters(); /* use default values for the rest */
953 static int parse_stream_args(void)
957 ret
= parse_receiver_args();
960 ret
= parse_filter_args();
963 ret
= parse_writer_args();
969 /* does not unlink socket on errors */
970 static int audiod_get_socket(void)
972 struct sockaddr_un unix_addr
;
975 if (conf
.socket_given
)
976 socket_name
= para_strdup(conf
.socket_arg
);
978 char *hn
= para_hostname();
979 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
983 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
984 if (conf
.force_given
)
986 ret
= create_local_socket(socket_name
, &unix_addr
,
987 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
991 if (listen(fd
, 5) < 0) {
992 ret
= -ERRNO_TO_PARA_ERROR(errno
);
995 ret
= mark_fd_nonblocking(fd
);
1000 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1004 static void signal_pre_select(struct sched
*s
, void *context
)
1006 struct signal_task
*st
= context
;
1007 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
1010 static int signal_post_select(struct sched
*s
, void *context
)
1012 struct signal_task
*st
= context
;
1015 ret
= task_get_notification(st
->task
);
1018 signum
= para_next_signal(&s
->rfds
);
1023 PARA_NOTICE_LOG("received signal %d\n", signum
);
1024 task_notify_all(s
, E_AUDIOD_SIGNAL
);
1025 return -E_AUDIOD_SIGNAL
;
1030 static void command_pre_select(struct sched
*s
, void *context
)
1032 struct command_task
*ct
= context
;
1033 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1036 static int command_post_select(struct sched
*s
, void *context
)
1039 struct command_task
*ct
= context
;
1040 static struct timeval last_status_dump
;
1041 struct timeval tmp
, delay
;
1044 ret
= task_get_notification(ct
->task
);
1047 ret
= handle_connect(ct
->fd
, &s
->rfds
);
1049 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1050 if (ret
== -E_AUDIOD_TERM
) {
1051 task_notify_all(s
, -ret
);
1057 /* if last status dump was less than 500ms ago, do nothing */
1059 delay
.tv_usec
= 500 * 1000;
1060 tv_add(&last_status_dump
, &delay
, &tmp
);
1061 if (tv_diff(now
, &tmp
, NULL
) < 0)
1065 * If last status dump was more than 5s ago, force update. Otherwise,
1066 * update only those items that have changed.
1070 tv_add(&last_status_dump
, &delay
, &tmp
);
1071 if (tv_diff(now
, &tmp
, NULL
) < 0)
1074 audiod_status_dump(force
);
1075 last_status_dump
= *now
;
1079 static void init_command_task(struct command_task
*ct
)
1081 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1083 ct
->task
= task_register(&(struct task_info
) {
1085 .pre_select
= command_pre_select
,
1086 .post_select
= command_post_select
,
1091 static void close_stat_pipe(void)
1095 task_reap(&stat_task
->ct
->task
);
1096 client_close(stat_task
->ct
);
1097 stat_task
->ct
= NULL
;
1098 clear_and_dump_items();
1099 stat_task
->length_seconds
= 0;
1100 stat_task
->offset_seconds
= 0;
1101 stat_task
->vss_status
= 0;
1102 stat_task
->current_audio_format_num
= -1;
1103 audiod_status_dump(true);
1106 /* avoid busy loop if server is down */
1107 static void set_stat_task_restart_barrier(unsigned seconds
)
1109 struct timeval delay
= {seconds
, 0};
1110 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1113 static bool must_close_slot(int slot_num
)
1115 struct slot_info
*s
= &slot
[slot_num
];
1116 struct audio_format_info
*a
= afi
+ s
->format
;
1121 if (s
->receiver_node
&& task_status(s
->receiver_node
->task
) >= 0)
1123 for (i
= 0; i
< a
->num_filters
; i
++)
1124 if (s
->fns
&& task_status(s
->fns
[i
].task
) >= 0)
1126 if (a
->num_writers
> 0) {
1127 for (i
= 0; i
< a
->num_writers
; i
++)
1128 if (s
->wns
&& task_status(s
->wns
[i
].task
) >= 0)
1131 if (s
->wns
&& task_status(s
->wns
[0].task
) >= 0)
1137 static void close_slot(int slot_num
)
1139 struct slot_info
*s
= slot
+ slot_num
;
1141 PARA_INFO_LOG("closing slot %d\n", slot_num
);
1144 close_receiver(slot_num
);
1145 clear_slot(slot_num
);
1148 static void close_unused_slots(void)
1153 if (must_close_slot(i
))
1158 * Cleanup all resources.
1160 * This performs various cleanups, removes the audiod socket and closes the
1161 * connection to para_server.
1163 static void audiod_cleanup(void)
1166 unlink(socket_name
);
1168 close_unused_slots();
1169 audiod_cmdline_parser_free(&conf
);
1170 close_stat_clients();
1174 * Check if any receivers/filters/writers need to be started and do so if
1177 static void start_stop_decoders(void)
1180 struct slot_info
*sl
;
1182 close_unused_slots();
1183 if (audiod_status
!= AUDIOD_ON
||
1184 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1185 return notify_receivers(E_NOT_PLAYING
);
1186 if (!must_start_decoder())
1188 ret
= open_receiver(stat_task
->current_audio_format_num
);
1190 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
1196 activate_grab_clients(&sched
);
1197 btr_log_tree(sl
->receiver_node
->btrn
, LL_NOTICE
);
1200 static void status_pre_select(struct sched
*s
, void *context
)
1202 struct status_task
*st
= context
;
1203 int i
, ret
, cafn
= stat_task
->current_audio_format_num
;
1205 if (must_start_decoder())
1208 if (must_close_slot(i
))
1210 ret
= btr_node_status(st
->btrn
, st
->min_iqs
, BTR_NT_LEAF
);
1213 if (st
->ct
&& audiod_status
== AUDIOD_OFF
)
1215 if (!st
->ct
&& audiod_status
!= AUDIOD_OFF
)
1216 sched_request_barrier_or_min_delay(&st
->restart_barrier
, s
);
1218 sched_request_barrier(&afi
[cafn
].restart_barrier
, s
);
1220 * If para_server is playing we'd like to have a smooth time display
1221 * even if we are running in standby mode. So we request a timeout that
1222 * expires at the next full second.
1224 if (stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)
1225 sched_request_timeout_ms(1000 - now
->tv_usec
/ 1000, s
);
1231 /* restart the client task if necessary */
1232 static int status_post_select(struct sched
*s
, void *context
)
1234 struct status_task
*st
= context
;
1237 ret
= task_get_notification(st
->task
);
1240 if (audiod_status
== AUDIOD_OFF
) {
1243 if (task_status(st
->ct
->task
) >= 0) {
1244 task_notify(st
->ct
->task
, E_AUDIOD_OFF
);
1248 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1255 ret
= btr_node_status(st
->btrn
, st
->min_iqs
, BTR_NT_LEAF
);
1260 if (st
->ct
->status
!= CL_EXECUTING
)
1263 struct timeval diff
;
1264 tv_diff(now
, &st
->last_status_read
, &diff
);
1265 if (diff
.tv_sec
> 61)
1266 task_notify(st
->ct
->task
, E_STATUS_TIMEOUT
);
1269 btr_merge(st
->btrn
, st
->min_iqs
);
1270 sz
= btr_next_buffer(st
->btrn
, &buf
);
1271 ret
= for_each_stat_item(buf
, sz
, update_item
);
1273 task_notify(st
->ct
->task
, -ret
);
1277 btr_consume(st
->btrn
, sz
- ret
);
1278 st
->last_status_read
= *now
;
1280 } else /* current status item crosses buffers */
1281 st
->min_iqs
= sz
+ 1;
1284 btr_drain(st
->btrn
);
1285 st
->current_audio_format_num
= -1;
1286 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1288 if (st
->clock_diff_count
) { /* get status only one time */
1289 char *argv
[] = {"audiod", "--", "stat", "-p", "-n=1", NULL
};
1291 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1292 st
->clock_diff_count
--;
1293 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
, s
);
1294 set_stat_task_restart_barrier(2);
1297 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1299 client_open(argc
, argv
, &st
->ct
, NULL
, NULL
, st
->btrn
, s
);
1300 set_stat_task_restart_barrier(5);
1302 free(stat_item_values
[SI_BASENAME
]);
1303 stat_item_values
[SI_BASENAME
] = para_strdup(
1304 "no connection to para_server");
1305 stat_client_write_item(SI_BASENAME
);
1306 st
->last_status_read
= *now
;
1308 start_stop_decoders();
1312 static void init_status_task(struct status_task
*st
)
1314 memset(st
, 0, sizeof(struct status_task
));
1315 st
->sa_time_diff_sign
= 1;
1316 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1317 st
->current_audio_format_num
= -1;
1318 st
->btrn
= btr_new_node(&(struct btr_node_description
)
1319 EMBRACE(.name
= "stat"));
1321 stat_task
->task
= task_register(&(struct task_info
) {
1323 .pre_select
= status_pre_select
,
1324 .post_select
= status_post_select
,
1325 .context
= stat_task
,
1329 static void set_initial_status(void)
1331 audiod_status
= AUDIOD_ON
;
1332 if (!conf
.mode_given
)
1334 if (!strcmp(conf
.mode_arg
, "sb")) {
1335 audiod_status
= AUDIOD_STANDBY
;
1338 if (!strcmp(conf
.mode_arg
, "off")) {
1339 audiod_status
= AUDIOD_OFF
;
1342 if (strcmp(conf
.mode_arg
, "on"))
1343 PARA_WARNING_LOG("invalid mode\n");
1346 __noreturn
static void print_help_and_die(void)
1348 struct ggo_help h
= DEFINE_GGO_HELP(audiod
);
1349 bool d
= conf
.detailed_help_given
;
1352 flags
= d
? GPH_STANDARD_FLAGS_DETAILED
: GPH_STANDARD_FLAGS
;
1353 ggo_print_help(&h
, flags
);
1355 flags
= d
? GPH_MODULE_FLAGS_DETAILED
: GPH_MODULE_FLAGS
;
1356 print_receiver_helps(flags
);
1357 print_filter_helps(flags
);
1358 print_writer_helps(flags
);
1362 static void init_colors_or_die(void)
1368 daemon_set_default_log_colors();
1369 daemon_set_flag(DF_COLOR_LOG
);
1370 for (i
= 0; i
< conf
.log_color_given
; i
++)
1371 daemon_set_log_color_or_die(conf
.log_color_arg
[i
]);
1375 * the main function of para_audiod
1377 * \param argc usual argument count
1378 * \param argv usual argument vector
1380 * \return EXIT_SUCCESS or EXIT_FAILURE
1382 * \sa para_audiod(1)
1384 int main(int argc
, char *argv
[])
1387 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1388 struct audiod_cmdline_parser_params params
= {
1391 .check_required
= 0,
1392 .check_ambiguity
= 0,
1397 audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
);
1398 daemon_set_loglevel(conf
.loglevel_arg
);
1399 version_handle_flag("audiod", conf
.version_given
);
1400 /* init receivers/filters/writers early to make help work */
1404 if (conf
.help_given
|| conf
.detailed_help_given
)
1405 print_help_and_die();
1406 daemon_drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1407 parse_config_or_die();
1408 init_colors_or_die();
1409 init_random_seed_or_die();
1410 daemon_set_flag(DF_LOG_TIME
);
1411 daemon_set_flag(DF_LOG_HOSTNAME
);
1412 daemon_set_flag(DF_LOG_LL
);
1413 if (conf
.log_timing_given
)
1414 daemon_set_flag(DF_LOG_TIMING
);
1415 if (conf
.logfile_given
) {
1416 daemon_set_logfile(conf
.logfile_arg
);
1417 daemon_open_log_or_die();
1419 ret
= parse_stream_args();
1421 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1424 daemon_log_welcome("para_audiod");
1425 daemon_set_start_time();
1426 set_initial_status();
1429 setup_signal_handling();
1431 init_status_task(stat_task
);
1432 init_command_task(cmd_task
);
1434 if (conf
.daemon_given
)
1435 daemonize(false /* parent exits immediately */);
1437 sig_task
->task
= task_register(&(struct task_info
) {
1439 .pre_select
= signal_pre_select
,
1440 .post_select
= signal_post_select
,
1441 .context
= sig_task
,
1444 sched
.default_timeout
.tv_sec
= 2;
1445 sched
.default_timeout
.tv_usec
= 999 * 1000;
1446 ret
= schedule(&sched
);
1448 sched_shutdown(&sched
);
1451 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1452 return ret
< 0? EXIT_FAILURE
: EXIT_SUCCESS
;