2 * Copyright (C) 2005-2009 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 */
14 #include "audiod.cmdline.h"
20 #include "grab_client.cmdline.h"
21 #include "grab_client.h"
22 #include "client.cmdline.h"
30 #include "write_common.h"
33 /** define the array of error lists needed by para_audiod */
35 /** define the array containing all supported audio formats */
36 const char *audio_formats
[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL
};
38 /** Defines how audiod handles one supported audio format. */
39 struct audio_format_info
{
40 /** pointer to the receiver for this audio format */
41 struct receiver
*receiver
;
42 /** the receiver configuration */
44 /** the number of filters that should be activated for this audio format */
45 unsigned int num_filters
;
46 /** Array of filter numbers to be activated. */
47 unsigned *filter_nums
;
48 /** Pointer to the array of filter configurations. */
50 /** the number of filters that should be activated for this audio format */
51 unsigned int num_writers
;
52 /** pointer to the array of writers to be activated */
53 struct writer
**writers
;
54 /** pointer to the array of writer configurations */
56 /** do not start receiver/filters/writer before this time */
57 struct timeval restart_barrier
;
61 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
62 * be associated with a receiver/filter/writer triple. This array holds all
63 * information on the status of these slots.
65 * \sa struct slot_info
67 struct slot_info slot
[MAX_STREAM_SLOTS
];
69 /** The vss status flags audiod is interested in. */
70 enum vss_status_flags
{
71 /** Whether the 'N' flag is set. */
72 VSS_STATUS_FLAG_NEXT
= 1,
73 /** The 'P' flag is set. */
74 VSS_STATUS_FLAG_PLAYING
= 2,
78 * The task for obtaining para_server's status (para_client stat).
80 * \sa struct task, struct sched.
83 /** The associated task structure of audiod. */
85 /** Client data associated with the stat task. */
86 struct client_task
*ct
;
87 /** Do not restart client command until this time. */
88 struct timeval restart_barrier
;
89 /** Last time we received status data from para_server. */
90 struct timeval last_status_read
;
91 /** The offset value announced by para_server. */
93 /** The length of the current audio file as announced by para_server. */
95 /** The start of the current stream from the view of para_server. */
96 struct timeval server_stream_start
;
97 /** The average time deviation between para_server and para_audiod. */
98 struct timeval sa_time_diff
;
99 /** Whether client time is ahead of server time. */
100 int sa_time_diff_sign
;
101 /** The 'P' and the 'N' flags as announced by para_server. */
102 enum vss_status_flags vss_status
;
103 /** Number of times the clock difference is to be checked. */
104 unsigned clock_diff_count
;
105 /** When to start the next check for clock difference. */
106 struct timeval clock_diff_barrier
;
107 /** Number of the audio format as announced by para_server. */
108 int current_audio_format_num
;
111 /** The array of status items sent by para_server. */
112 char *stat_item_values
[NUM_STAT_ITEMS
] = {NULL
};
115 * the current mode of operation of which can be changed by the on/off/cycle
116 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
118 int audiod_status
= AUDIOD_ON
;
121 * the gengetopt args_info struct that holds information on all command line
124 struct audiod_args_info conf
;
126 static char *socket_name
;
127 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
129 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
131 static struct status_task status_task_struct
;
134 * the task that calls the status command of para_server
136 * \sa struct status_task
138 static struct status_task
*stat_task
= &status_task_struct
;
139 static struct timeval initial_delay_barrier
;
142 * the task for handling audiod commands
144 * \sa struct task, struct sched
146 struct command_task
{
147 /** the local listening socket */
149 /** the associated task structure */
153 /** iterate over all supported audio formats */
154 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
157 * get the audio format number
158 * \param name the name of the audio format
160 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
161 * \a name is not a supported audio format.
163 int get_audio_format_num(char *name
)
167 while (para_isspace(*name
))
169 FOR_EACH_AUDIO_FORMAT(i
)
170 if (!strcmp(name
, audio_formats
[i
]))
172 return -E_UNSUPPORTED_AUDIO_FORMAT
;
175 char *get_time_string(int slot_num
)
177 int ret
, seconds
= 0, length
;
178 struct timeval
*tmp
, sum
, sss
, /* server stream start */
179 wtime
, /* now - writer start */
180 rskip
; /* receiver start - sss */
181 struct slot_info
*s
= slot_num
< 0? NULL
: &slot
[slot_num
];
183 if (audiod_status
== AUDIOD_OFF
)
185 if (!(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)) {
186 if (stat_task
->length_seconds
) /* paused */
188 goto empty
; /* stopped */
190 if (audiod_status
== AUDIOD_ON
&& !s
)
192 /* valid status items and playing */
193 if (s
) { /* writer active in this slot */
194 length
= s
->seconds_total
;
195 tmp
= &s
->server_stream_start
;
196 } else { /* standby mode, rely on status items */
197 length
= stat_task
->length_seconds
;
198 tmp
= &stat_task
->server_stream_start
;
200 if (stat_task
->sa_time_diff_sign
> 0)
201 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
203 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
206 tv_diff(now
, &sss
, &diff
);
207 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
210 tv_diff(now
, &s
->wstime
, &wtime
);
211 seconds
= s
->offset_seconds
;
212 ret
= tv_diff(&s
->rstime
, &sss
, &rskip
);
213 if (ret
> 0) { /* audiod was started in the middle of the stream */
214 tv_add(&wtime
, &rskip
, &sum
);
215 seconds
+= sum
.tv_sec
;
217 seconds
+= wtime
.tv_sec
;
219 seconds
= PARA_MIN(seconds
, length
);
220 seconds
= PARA_MAX(seconds
, 0);
222 "%s: %s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
223 status_item_list
[SI_PLAY_TIME
],
227 (length
- seconds
) / 60,
228 (length
- seconds
) % 60,
229 length
? (seconds
* 100 + length
/ 2) / length
: 0,
234 return make_message("%s:\n", status_item_list
[SI_PLAY_TIME
]);
237 static int want_colors(void)
239 if (conf
.color_arg
== color_arg_no
)
241 if (conf
.color_arg
== color_arg_yes
)
243 if (conf
.logfile_given
)
245 return isatty(STDERR_FILENO
);
248 static void parse_config_or_die(void)
252 struct audiod_cmdline_parser_params params
= {
256 .check_ambiguity
= 0,
260 if (conf
.config_file_given
)
261 config_file
= para_strdup(conf
.config_file_arg
);
263 char *home
= para_homedir();
264 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
267 ret
= file_exists(config_file
);
268 if (conf
.config_file_given
&& !ret
) {
269 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
273 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
275 daemon_set_loglevel(conf
.loglevel_arg
);
282 static void setup_signal_handling(void)
284 sig_task
->fd
= para_signal_init();
285 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
286 para_install_sighandler(SIGINT
);
287 para_install_sighandler(SIGTERM
);
288 para_install_sighandler(SIGHUP
);
289 para_sigaction(SIGPIPE
, SIG_IGN
);
292 static void clear_slot(int slot_num
)
294 struct slot_info
*s
= &slot
[slot_num
];
296 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
297 memset(s
, 0, sizeof(struct slot_info
));
301 static void close_receiver(int slot_num
)
303 struct slot_info
*s
= &slot
[slot_num
];
304 struct audio_format_info
*a
;
306 if (s
->format
< 0 || !s
->receiver_node
)
309 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
310 audio_formats
[s
->format
], slot_num
);
311 a
->receiver
->close(s
->receiver_node
);
312 free(s
->receiver_node
);
313 s
->receiver_node
= NULL
;
316 static void kill_all_decoders(int error
)
321 struct slot_info
*s
= &slot
[i
];
322 if (s
->wng
&& s
->wng
->task
.error
>= 0) {
323 PARA_INFO_LOG("deactivating wng in slot %d\n",
325 s
->wng
->task
.error
= error
;
327 if (s
->fc
&& s
->fc
->task
.error
>= 0) {
328 PARA_INFO_LOG("deactivatimg filter chain in slot %d\n", i
);
329 s
->fc
->task
.error
= error
;
331 if (s
->receiver_node
&& s
->receiver_node
->task
.error
>= 0) {
332 PARA_INFO_LOG("deactivating receiver_node in slot %d\n", i
);
333 s
->receiver_node
->task
.error
= error
;
338 static int get_empty_slot(void)
349 if (s
->wng
|| s
->receiver_node
|| s
->fc
)
354 return -E_NO_MORE_SLOTS
;
358 * get the number of filters
360 * \param audio_format_num the number identifying the audio format
362 * \return the number of filters for the given audio format
366 int num_filters(int audio_format_num
)
368 return afi
[audio_format_num
].num_filters
;
371 static void open_filters(int slot_num
)
373 struct slot_info
*s
= &slot
[slot_num
];
374 struct audio_format_info
*a
= &afi
[s
->format
];
375 struct filter_node
*fn
;
376 int nf
= a
->num_filters
;
382 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
383 s
->fc
= para_calloc(sizeof(struct filter_chain
));
384 s
->fc
->filter_nodes
= para_malloc(nf
* sizeof(struct filter_node
));
385 s
->fc
->inbufp
= &s
->receiver_node
->buf
;
386 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
387 s
->fc
->input_error
= &s
->receiver_node
->task
.error
;
388 s
->fc
->task
.pre_select
= filter_pre_select
;
389 s
->fc
->task
.post_select
= NULL
;
390 s
->fc
->task
.error
= 0;
391 s
->fc
->num_filters
= nf
;
393 s
->receiver_node
->output_error
= &s
->fc
->task
.error
;
394 sprintf(s
->fc
->task
.status
, "filter chain");
395 FOR_EACH_FILTER_NODE(fn
, s
->fc
, i
) {
396 struct filter
*f
= filters
+ a
->filter_nums
[i
];
397 fn
->filter_num
= a
->filter_nums
[i
];
398 fn
->conf
= a
->filter_conf
[i
];
401 INIT_LIST_HEAD(&fn
->callbacks
);
403 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
404 audio_formats
[s
->format
], i
, nf
, f
->name
, slot_num
);
405 s
->fc
->outbufp
= &fn
->buf
;
406 s
->fc
->out_loaded
= &fn
->loaded
;
408 register_task(&s
->fc
->task
);
411 static void open_writers(int slot_num
)
414 struct slot_info
*s
= &slot
[slot_num
];
415 struct audio_format_info
*a
= &afi
[s
->format
];
417 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
419 s
->wng
= setup_default_wng();
421 s
->wng
= wng_new(a
->num_writers
);
423 s
->wng
->bufp
= s
->fc
->outbufp
;
424 s
->wng
->loaded
= s
->fc
->out_loaded
;
425 s
->wng
->input_error
= &s
->fc
->task
.error
;
426 s
->wng
->channels
= &s
->fc
->channels
;
427 s
->wng
->samplerate
= &s
->fc
->samplerate
;
428 s
->fc
->output_error
= &s
->wng
->task
.error
;
429 PARA_INFO_LOG("samplerate: %d\n", *s
->wng
->samplerate
);
431 s
->wng
->bufp
= &s
->receiver_node
->buf
;
432 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
433 s
->wng
->input_error
= &s
->receiver_node
->task
.error
;
435 for (i
= 0; i
< a
->num_writers
; i
++) {
436 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
437 s
->wng
->writer_nodes
[i
].writer
= a
->writers
[i
];
439 ret
= wng_open(s
->wng
);
441 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
445 s
->server_stream_start
= stat_task
->server_stream_start
.tv_sec
?
446 stat_task
->server_stream_start
: *now
;
447 s
->offset_seconds
= stat_task
->offset_seconds
;
448 s
->seconds_total
= stat_task
->length_seconds
;
449 activate_inactive_grab_clients(slot_num
, s
->format
, s
->fc
);
452 static int open_receiver(int format
)
454 struct audio_format_info
*a
= &afi
[format
];
457 struct receiver_node
*rn
;
458 const struct timeval restart_delay
= {2, 0};
460 ret
= get_empty_slot();
466 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
467 rn
= s
->receiver_node
;
468 rn
->receiver
= a
->receiver
;
469 rn
->conf
= a
->receiver_conf
;
470 ret
= a
->receiver
->open(s
->receiver_node
);
472 free(s
->receiver_node
);
473 s
->receiver_node
= NULL
;
476 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
477 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
478 rn
->task
.pre_select
= a
->receiver
->pre_select
;
479 rn
->task
.post_select
= a
->receiver
->post_select
;
481 sprintf(rn
->task
.status
, "%s receiver node", rn
->receiver
->name
);
482 register_task(&rn
->task
);
486 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
487 tv_add(now
, &restart_delay
, &afi
[format
].restart_barrier
);
491 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
492 static int receiver_running(int format
)
497 struct slot_info
*s
= &slot
[i
];
498 if (s
->format
!= format
)
500 if (!s
->receiver_node
)
502 if (s
->receiver_node
->task
.error
>= 0)
509 static void open_current_receiver(struct sched
*s
)
512 int ret
, cafn
= stat_task
->current_audio_format_num
;
514 if (cafn
< 0 || !stat_task
->ct
)
516 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
517 if (stat_task
->vss_status
!= VSS_STATUS_FLAG_PLAYING
)
519 ret
= receiver_running(cafn
);
520 if (ret
> 0) /* already running and not eof */
522 if (ret
< 0) { /* eof */
524 * para_server uses a zero start time during the announcement
525 * period, i.e. before it sends the first chunk. Wait until
526 * this period begins to avoid restarting the receiver that
527 * belongs to the file just completed.
529 if (stat_task
->server_stream_start
.tv_sec
)
532 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, &diff
) < 0) {
533 /* avoid busy loop */
537 /* start a new receiver */
541 static unsigned compute_time_diff(const struct timeval
*status_time
)
543 struct timeval tmp
, diff
;
544 static unsigned count
;
545 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
546 const struct timeval max_deviation
= {0, 500 * 1000};
547 const int time_smooth
= 5;
551 sign
= tv_diff(status_time
, now
, &diff
);
552 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
553 // sign, sa_time_diff_sign);
555 sa_time_diff_sign
= sign
;
556 stat_task
->sa_time_diff
= diff
;
561 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
562 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
563 PARA_WARNING_LOG("time diff jump: %lims\n",
567 sa_time_diff_sign
= tv_convex_combination(
568 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
569 count
> 10? sign
: sign
* time_smooth
, &diff
,
571 stat_task
->sa_time_diff
= tmp
;
572 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
575 sa_time_diff_sign
? "+" : "-",
576 tv2ms(&stat_task
->sa_time_diff
)
579 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
583 static int check_stat_line(char *line
, __a_unused
void *data
)
587 long unsigned sec
, usec
;
590 //PARA_INFO_LOG("line: %s\n", line);
593 itemnum
= stat_line_valid(line
);
595 PARA_WARNING_LOG("invalid status line: %s\n", line
);
598 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
600 tmp
= make_message("%s\n", line
);
601 stat_client_write(tmp
, itemnum
);
603 free(stat_item_values
[itemnum
]);
604 stat_item_values
[itemnum
] = para_strdup(line
);
605 ilen
= strlen(status_item_list
[itemnum
]);
607 case SI_STATUS_FLAGS
:
608 stat_task
->vss_status
= 0;
609 if (strchr(line
, 'N'))
610 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
611 if (strchr(line
, 'P'))
612 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
615 stat_task
->offset_seconds
= atoi(line
+ ilen
+ 1);
617 case SI_SECONDS_TOTAL
:
618 stat_task
->length_seconds
= atoi(line
+ ilen
+ 1);
620 case SI_STREAM_START
:
621 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
622 struct timeval a_start
, delay
;
623 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
624 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
625 stat_task
->server_stream_start
.tv_sec
= sec
;
626 stat_task
->server_stream_start
.tv_usec
= usec
;
627 if (compute_time_diff(NULL
) > 2) {
628 if (stat_task
->sa_time_diff_sign
< 0)
629 tv_add(&stat_task
->server_stream_start
,
630 &stat_task
->sa_time_diff
, &a_start
);
632 tv_diff(&stat_task
->server_stream_start
,
633 &stat_task
->sa_time_diff
, &a_start
);
634 tv_add(&a_start
, &delay
, &initial_delay_barrier
);
638 case SI_CURRENT_TIME
:
639 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
640 struct timeval tv
= {sec
, usec
};
641 compute_time_diff(&tv
);
645 stat_task
->current_audio_format_num
= get_audio_format_num(
651 static int parse_stream_command(const char *txt
, char **cmd
)
653 char *p
= strchr(txt
, ':');
657 return -E_MISSING_COLON
;
659 FOR_EACH_AUDIO_FORMAT(i
) {
660 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
665 return -E_UNSUPPORTED_AUDIO_FORMAT
;
668 static int add_filter(int format
, char *cmdline
)
670 struct audio_format_info
*a
= &afi
[format
];
671 int filter_num
, nf
= a
->num_filters
;
673 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
676 a
->filter_nums
[nf
] = filter_num
;
678 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
679 filters
[filter_num
].name
);
683 static int parse_writer_args(void)
687 struct audio_format_info
*a
;
689 nw
= PARA_MAX(1U, conf
.writer_given
);
690 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
691 FOR_EACH_AUDIO_FORMAT(i
) {
693 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
694 a
->writers
= para_malloc(nw
* sizeof(struct writer
*));
697 for (i
= 0; i
< conf
.writer_given
; i
++) {
700 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
705 wconf
= check_writer_arg(cmd
, &writer_num
);
710 a
->writers
[nw
] = &writers
[writer_num
];
711 a
->writer_conf
[nw
] = wconf
;
712 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
713 nw
, writer_names
[writer_num
]);
721 static int parse_receiver_args(void)
723 int i
, ret
, receiver_num
;
725 struct audio_format_info
*a
;
727 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
728 char *arg
= conf
.receiver_arg
[i
];
729 char *recv_arg
= strchr(arg
, ':');
730 ret
= -E_MISSING_COLON
;
735 ret
= get_audio_format_num(arg
);
738 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
739 if (!afi
[ret
].receiver_conf
) {
740 ret
= -E_RECV_SYNTAX
;
743 afi
[ret
].receiver
= &receivers
[receiver_num
];
745 /* use the first available receiver with no arguments
746 * for those audio formats for which no receiver
749 cmd
= para_strdup(receivers
[0].name
);
750 FOR_EACH_AUDIO_FORMAT(i
) {
752 if (a
->receiver_conf
)
754 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
755 if (!a
->receiver_conf
)
756 return -E_RECV_SYNTAX
;
757 a
->receiver
= &receivers
[receiver_num
];
765 static int init_default_filters(void)
769 FOR_EACH_AUDIO_FORMAT(i
) {
770 struct audio_format_info
*a
= &afi
[i
];
775 continue; /* no default -- nothing to to */
776 /* add "dec" to audio format name */
777 tmp
= make_message("%sdec", audio_formats
[i
]);
778 for (j
= 0; filters
[j
].name
; j
++)
779 if (!strcmp(tmp
, filters
[j
].name
))
782 ret
= -E_UNSUPPORTED_FILTER
;
783 if (!filters
[j
].name
)
785 tmp
= para_strdup(filters
[j
].name
);
786 ret
= add_filter(i
, tmp
);
790 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
797 static int parse_filter_args(void)
801 nf
= PARA_MAX(1U, conf
.filter_given
);
802 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
803 FOR_EACH_AUDIO_FORMAT(i
) {
804 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
805 afi
[i
].filter_nums
= para_malloc(nf
* sizeof(unsigned));
807 if (!conf
.no_default_filters_given
)
808 return init_default_filters();
809 for (i
= 0; i
< conf
.filter_given
; i
++) {
810 char *arg
= conf
.filter_arg
[i
];
811 char *filter_name
= strchr(arg
, ':');
812 ret
= -E_MISSING_COLON
;
817 ret
= get_audio_format_num(arg
);
820 ret
= add_filter(ret
, filter_name
);
824 ret
= init_default_filters(); /* use default values for the rest */
829 static int parse_stream_args(void)
833 ret
= parse_receiver_args();
836 ret
= parse_filter_args();
839 ret
= parse_writer_args();
845 /* does not unlink socket on errors */
846 static int audiod_get_socket(void)
848 struct sockaddr_un unix_addr
;
851 if (conf
.socket_given
)
852 socket_name
= para_strdup(conf
.socket_arg
);
854 char *hn
= para_hostname();
855 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
859 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
860 if (conf
.force_given
)
862 ret
= create_local_socket(socket_name
, &unix_addr
,
863 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
867 if (listen(fd
, 5) < 0) {
868 ret
= -ERRNO_TO_PARA_ERROR(errno
);
871 ret
= mark_fd_nonblocking(fd
);
876 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
880 static void signal_pre_select(struct sched
*s
, struct task
*t
)
882 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
883 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
886 static void signal_post_select(struct sched
*s
, struct task
*t
)
888 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
890 if (!FD_ISSET(st
->fd
, &s
->rfds
))
893 st
->signum
= para_next_signal();
894 switch (st
->signum
) {
898 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
899 clean_exit(EXIT_FAILURE
, "caught deadly signal");
903 static void signal_setup_default(struct signal_task
*st
)
905 st
->task
.pre_select
= signal_pre_select
;
906 st
->task
.post_select
= signal_post_select
;
907 sprintf(st
->task
.status
, "signal task");
910 static void command_pre_select(struct sched
*s
, struct task
*t
)
912 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
913 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
916 static void command_post_select(struct sched
*s
, struct task
*t
)
919 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
921 audiod_status_dump();
922 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
924 ret
= handle_connect(ct
->fd
);
926 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
929 static void init_command_task(struct command_task
*ct
)
931 ct
->task
.pre_select
= command_pre_select
;
932 ct
->task
.post_select
= command_post_select
;
934 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
935 sprintf(ct
->task
.status
, "command task");
938 static void close_stat_pipe(void)
944 client_close(stat_task
->ct
);
945 stat_task
->ct
= NULL
;
946 FOR_EACH_STATUS_ITEM(i
) {
947 free(stat_item_values
[i
]);
948 stat_item_values
[i
] = NULL
;
951 stat_task
->length_seconds
= 0;
952 stat_task
->offset_seconds
= 0;
953 stat_task
->vss_status
= 0;
954 audiod_status_dump();
958 * close the connection to para_server and exit
960 * \param status the exit status which is passed to exit(3)
961 * \param msg the log message
963 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
964 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
969 void __noreturn
clean_exit(int status
, const char *msg
)
971 PARA_EMERG_LOG("%s\n", msg
);
978 /* avoid busy loop if server is down */
979 static void set_stat_task_restart_barrier(unsigned seconds
)
981 struct timeval delay
= {seconds
, 0};
982 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
985 static void try_to_close_slot(int slot_num
)
987 struct slot_info
*s
= &slot
[slot_num
];
991 if (s
->receiver_node
&& s
->receiver_node
->task
.error
!= -E_TASK_UNREGISTERED
)
993 if (s
->fc
&& s
->fc
->task
.error
!= -E_TASK_UNREGISTERED
)
995 if (s
->wng
&& s
->wng
->task
.error
!= -E_TASK_UNREGISTERED
)
997 PARA_INFO_LOG("closing slot %d\n", slot_num
);
999 close_filters(s
->fc
);
1001 close_receiver(slot_num
);
1002 clear_slot(slot_num
);
1006 * Check if any receivers/filters/writers need to be started and do so if
1009 static void start_stop_decoders(struct sched
*s
)
1014 try_to_close_slot(i
);
1015 if (audiod_status
!= AUDIOD_ON
||
1016 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1017 return kill_all_decoders(-E_NOT_PLAYING
);
1018 open_current_receiver(s
);
1020 struct slot_info
*sl
= &slot
[i
];
1021 struct audio_format_info
*a
;
1022 struct timeval diff
;
1026 a
= &afi
[sl
->format
];
1027 if (!sl
->receiver_node
)
1029 if ((!a
->num_filters
|| sl
->fc
) && sl
->wng
)
1030 continue; /* everything already started */
1031 if (!a
->num_filters
) {
1032 if (sl
->receiver_node
->loaded
&& !sl
->wng
) {
1037 if (sl
->receiver_node
->loaded
&& !sl
->fc
) {
1041 if (sl
->wng
|| !sl
->fc
|| !*sl
->fc
->out_loaded
)
1043 if (tv_diff(now
, &initial_delay_barrier
, &diff
) > 0) {
1047 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff
));
1048 if (tv_diff(&s
->timeout
, &diff
, NULL
) > 0) {
1055 /* restart the client task if necessary */
1056 static void status_pre_select(struct sched
*s
, struct task
*t
)
1058 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1060 if (audiod_status
== AUDIOD_OFF
) {
1063 if (st
->ct
->task
.error
>= 0) {
1064 st
->ct
->task
.error
= -E_AUDIOD_OFF
;
1067 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1070 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1074 unsigned bytes_left
;
1075 if (st
->ct
->task
.error
< 0) {
1076 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1081 if (st
->ct
->status
!= CL_RECEIVING
)
1083 bytes_left
= for_each_line(st
->ct
->buf
, st
->ct
->loaded
,
1084 &check_stat_line
, NULL
);
1085 if (st
->ct
->loaded
!= bytes_left
) {
1086 st
->last_status_read
= *now
;
1087 st
->ct
->loaded
= bytes_left
;
1089 struct timeval diff
;
1090 tv_diff(now
, &st
->last_status_read
, &diff
);
1091 if (diff
.tv_sec
> 61)
1092 st
->ct
->task
.error
= -E_STATUS_TIMEOUT
;
1096 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1098 if (st
->clock_diff_count
) { /* get status only one time */
1099 char *argv
[] = {"audiod", "stat", "1", NULL
};
1101 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1102 st
->clock_diff_count
--;
1103 client_open(argc
, argv
, &st
->ct
, NULL
);
1104 set_stat_task_restart_barrier(2);
1107 char *argv
[] = {"audiod", "stat", NULL
};
1109 client_open(argc
, argv
, &st
->ct
, NULL
);
1110 set_stat_task_restart_barrier(5);
1112 free(stat_item_values
[SI_BASENAME
]);
1113 stat_item_values
[SI_BASENAME
] = make_message(
1114 "%s: no connection to para_server\n",
1115 status_item_list
[SI_BASENAME
]);
1116 stat_client_write(stat_item_values
[SI_BASENAME
],
1118 st
->last_status_read
= *now
;
1120 start_stop_decoders(s
);
1123 static void init_status_task(struct status_task
*st
)
1125 memset(st
, 0, sizeof(struct status_task
));
1126 st
->task
.pre_select
= status_pre_select
;
1127 st
->sa_time_diff_sign
= 1;
1128 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1129 st
->current_audio_format_num
= -1;
1130 sprintf(st
->task
.status
, "status task");
1133 static void set_initial_status(void)
1135 audiod_status
= AUDIOD_ON
;
1136 if (!conf
.mode_given
)
1138 if (!strcmp(conf
.mode_arg
, "sb")) {
1139 audiod_status
= AUDIOD_STANDBY
;
1142 if (!strcmp(conf
.mode_arg
, "off")) {
1143 audiod_status
= AUDIOD_OFF
;
1146 if (strcmp(conf
.mode_arg
, "on"))
1147 PARA_WARNING_LOG("invalid mode\n");
1150 __noreturn
static void print_help_and_die(void)
1152 int d
= conf
.detailed_help_given
;
1153 const char **p
= d
? audiod_args_info_detailed_help
1154 : audiod_args_info_help
;
1156 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1157 AUDIOD_CMDLINE_PARSER_VERSION
);
1158 printf_or_die("%s\n\n", audiod_args_info_usage
);
1160 printf_or_die("%s\n", *p
);
1161 print_receiver_helps(d
);
1162 print_filter_helps(d
);
1163 print_writer_helps(d
);
1167 static void init_colors_or_die(void)
1173 daemon_set_default_log_colors();
1174 daemon_set_flag(DF_COLOR_LOG
);
1175 for (i
= 0; i
< conf
.log_color_given
; i
++) {
1176 ret
= daemon_set_log_color(conf
.log_color_arg
[i
]);
1183 * the main function of para_audiod
1185 * \param argc usual argument count
1186 * \param argv usual argument vector
1188 * \return EXIT_SUCCESS or EXIT_FAILURE
1190 * \sa para_audiod(1)
1192 int main(int argc
, char *argv
[])
1195 static struct sched s
;
1196 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1197 struct audiod_cmdline_parser_params params
= {
1200 .check_required
= 0,
1201 .check_ambiguity
= 0,
1206 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1208 HANDLE_VERSION_FLAG("audiod", conf
);
1209 /* init receivers/filters/writers early to make help work */
1213 if (conf
.help_given
|| conf
.detailed_help_given
)
1214 print_help_and_die();
1215 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1216 parse_config_or_die();
1217 init_colors_or_die();
1218 daemon_set_flag(DF_LOG_TIME
);
1219 daemon_set_flag(DF_LOG_HOSTNAME
);
1220 daemon_set_flag(DF_LOG_LL
);
1221 if (conf
.logfile_given
) {
1222 daemon_set_logfile(conf
.logfile_arg
);
1223 daemon_open_log_or_die();
1225 ret
= parse_stream_args();
1227 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1230 log_welcome("para_audiod");
1231 server_uptime(UPTIME_SET
);
1232 set_initial_status();
1236 setup_signal_handling();
1237 signal_setup_default(sig_task
);
1239 init_status_task(stat_task
);
1240 init_command_task(cmd_task
);
1242 if (conf
.daemon_given
)
1245 register_task(&sig_task
->task
);
1246 register_task(&cmd_task
->task
);
1247 register_task(&stat_task
->task
);
1248 s
.default_timeout
.tv_sec
= 0;
1249 s
.default_timeout
.tv_usec
= 99 * 1000;
1252 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1253 return EXIT_FAILURE
;