2 * Copyright (C) 2005-2007 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 */
11 #include "audiod.cmdline.h"
16 #include "grab_client.cmdline.h"
17 #include "grab_client.h"
18 #include "client.cmdline.h"
26 #include "write_common.h"
30 /** define the array of error lists needed by para_audiod */
32 /** define the array containing all supported audio formats */
33 const char *audio_formats
[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL
};
35 /** defines how to handle one supported audio format */
36 struct audio_format_info
{
37 /** pointer to the receiver for this audio format */
38 struct receiver
*receiver
;
39 /** the receiver configuration */
41 /** the number of filters that should be activated for this audio format */
42 unsigned int num_filters
;
43 /** pointer to the array of filters to be activated */
44 struct filter
**filters
;
45 /** pointer to the array of filter configurations */
47 /** the number of filters that should be activated for this audio format */
48 unsigned int num_writers
;
49 /** pointer to the array of writers to be activated */
50 struct writer
**writers
;
51 /** pointer to the array of writer configurations */
53 /** do not start receiver/filters/writer before this time */
54 struct timeval restart_barrier
;
58 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
59 * be associated with a receiver/filter/writer triple. This array holds all
60 * information on the status of these slots.
62 * \sa struct slot_info
64 struct slot_info slot
[MAX_STREAM_SLOTS
];
68 * the current mode of operation of which can be changed by the on/off/cycle
69 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
71 int audiod_status
= AUDIOD_ON
;
74 * the gengetopt args_info struct that holds information on all command line
77 struct audiod_args_info conf
;
79 static char *socket_name
;
81 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
83 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
85 static struct status_task status_task_struct
;
88 * the task that calls the status command of para_server
90 * \sa struct status_task
92 struct status_task
*stat_task
= &status_task_struct
;
93 static struct timeval initial_delay_barrier
;
96 * the task for handling audiod commands
98 * \sa struct task, struct sched
100 struct command_task
{
101 /** the local listening socket */
103 /** the associated task structure */
108 * task for signal handling
111 /** the signal pipe */
113 /** the number of the most recent signal */
115 /** the associated task structure */
119 /** iterate over all supported audio formats */
120 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
123 * get the audio format number
124 * \param name the name of the audio format
126 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
127 * \a name is not a supported audio format.
129 int get_audio_format_num(char *name
)
132 FOR_EACH_AUDIO_FORMAT(i
)
133 if (!strcmp(name
, audio_formats
[i
]))
135 return -E_UNSUPPORTED_AUDIO_FORMAT
;
139 * the log function of para_audiod
142 * \param fmt the format string
144 void para_log(int ll
, const char* fmt
,...)
150 char str
[MAXLINE
] = "";
151 static char *hostname
;
153 if (ll
< conf
.loglevel_arg
)
156 hostname
= para_hostname();
157 outfd
= logfile
? logfile
: stderr
;
160 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
161 fprintf(outfd
, "%s %s ", str
, hostname
);
162 if (conf
.loglevel_arg
<= INFO
)
163 fprintf(outfd
, "%i ", ll
);
165 vfprintf(outfd
, fmt
, argp
);
169 static char *configfile_exists(void)
171 static char *config_file
;
174 char *home
= para_homedir();
175 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
178 return file_exists(config_file
)? config_file
: NULL
;
181 static void setup_signal_handling(void)
183 sig_task
->fd
= para_signal_init();
184 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
185 para_install_sighandler(SIGINT
);
186 para_install_sighandler(SIGTERM
);
187 para_install_sighandler(SIGHUP
);
188 signal(SIGPIPE
, SIG_IGN
);
191 static void clear_slot(int slot_num
)
193 struct slot_info
*s
= &slot
[slot_num
];
195 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
196 memset(s
, 0, sizeof(struct slot_info
));
200 static void close_receiver(int slot_num
)
202 struct slot_info
*s
= &slot
[slot_num
];
203 struct audio_format_info
*a
;
205 if (s
->format
< 0 || !s
->receiver_node
)
208 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
209 audio_formats
[s
->format
] , slot_num
, s
->receiver_node
->eof
);
210 a
->receiver
->close(s
->receiver_node
);
211 free(s
->receiver_node
);
212 s
->receiver_node
= NULL
;
215 static void kill_all_decoders(void)
220 struct slot_info
*s
= &slot
[i
];
221 if (s
->wng
&& !s
->wng
->eof
) {
222 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
224 wng_unregister(s
->wng
);
227 if (s
->fc
&& !s
->fc
->eof
) {
228 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i
);
229 unregister_task(&s
->fc
->task
);
232 if (s
->receiver_node
&& !s
->receiver_node
->eof
) {
233 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i
);
234 unregister_task(&s
->receiver_node
->task
);
235 s
->receiver_node
->eof
= 1;
240 static int get_empty_slot(void)
251 if (s
->wng
|| s
->receiver_node
|| s
->fc
)
256 return -E_NO_MORE_SLOTS
;
260 * get the number of filters
262 * \param audio_format_num the number identifying the audio format
264 * \return the number of filters for the given audio format
268 int num_filters(int audio_format_num
)
270 return afi
[audio_format_num
].num_filters
;
273 static void filter_event_handler(struct task
*t
)
275 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
276 struct filter_chain
*fc
= t
->private_data
;
281 static void open_filters(int slot_num
)
283 struct slot_info
*s
= &slot
[slot_num
];
284 struct audio_format_info
*a
= &afi
[s
->format
];
285 int nf
= a
->num_filters
;
291 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
292 s
->fc
= para_calloc(sizeof(struct filter_chain
));
293 INIT_LIST_HEAD(&s
->fc
->filters
);
294 s
->fc
->inbuf
= s
->receiver_node
->buf
;
295 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
296 s
->fc
->input_eof
= &s
->receiver_node
->eof
;
297 s
->fc
->task
.pre_select
= filter_pre_select
;
298 s
->fc
->task
.event_handler
= filter_event_handler
;
299 s
->fc
->task
.private_data
= s
->fc
;
302 s
->receiver_node
->output_eof
= &s
->fc
->eof
;
303 sprintf(s
->fc
->task
.status
, "filter chain");
304 for (i
= 0; i
< nf
; i
++) {
305 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
306 fn
->conf
= a
->filter_conf
[i
];
308 fn
->filter
= a
->filters
[i
];
309 INIT_LIST_HEAD(&fn
->callbacks
);
310 list_add_tail(&fn
->node
, &s
->fc
->filters
);
311 fn
->filter
->open(fn
);
312 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
313 audio_formats
[s
->format
], i
+ 1, nf
,
314 fn
->filter
->name
, slot_num
);
315 s
->fc
->outbuf
= fn
->buf
;
316 s
->fc
->out_loaded
= &fn
->loaded
;
318 register_task(&s
->fc
->task
);
321 static void wng_event_handler(struct task
*t
)
323 struct writer_node_group
*wng
= t
->private_data
;
325 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t
->ret
));
330 static void open_writers(int slot_num
)
333 struct slot_info
*s
= &slot
[slot_num
];
334 struct audio_format_info
*a
= &afi
[s
->format
];
336 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
338 s
->wng
= setup_default_wng();
340 s
->wng
= wng_new(a
->num_writers
);
342 s
->wng
->buf
= s
->fc
->outbuf
;
343 s
->wng
->loaded
= s
->fc
->out_loaded
;
344 s
->wng
->input_eof
= &s
->fc
->eof
;
345 s
->wng
->channels
= &s
->fc
->channels
;
346 s
->wng
->samplerate
= &s
->fc
->samplerate
;
347 s
->fc
->output_eof
= &s
->wng
->eof
;
348 PARA_INFO_LOG("samplerate: %d\n", *s
->wng
->samplerate
);
350 s
->wng
->buf
= s
->receiver_node
->buf
;
351 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
352 s
->wng
->input_eof
= &s
->receiver_node
->eof
;
354 s
->wng
->task
.event_handler
= wng_event_handler
;
355 for (i
= 0; i
< a
->num_writers
; i
++) {
356 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
357 s
->wng
->writer_nodes
[i
].writer
= a
->writers
[i
];
359 ret
= wng_open(s
->wng
);
361 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
365 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fc
->filters
);
368 static void rn_event_handler(struct task
*t
)
370 struct receiver_node
*rn
= t
->private_data
;
371 const struct timeval restart_delay
= {0, 10 * 1000};
374 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
377 /* set restart barrier */
379 if (slot
[i
].receiver_node
!= rn
)
381 tv_add(now
, &restart_delay
, &afi
[slot
[i
].format
].restart_barrier
);
385 static int open_receiver(int format
)
387 struct audio_format_info
*a
= &afi
[format
];
390 struct receiver_node
*rn
;
391 const struct timeval restart_delay
= {1, 0};
393 ret
= get_empty_slot();
399 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
400 rn
= s
->receiver_node
;
401 rn
->receiver
= a
->receiver
;
402 rn
->conf
= a
->receiver_conf
;
403 ret
= a
->receiver
->open(s
->receiver_node
);
405 free(s
->receiver_node
);
406 s
->receiver_node
= NULL
;
409 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
410 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
411 rn
->task
.private_data
= s
->receiver_node
;
412 rn
->task
.pre_select
= a
->receiver
->pre_select
;
413 rn
->task
.post_select
= a
->receiver
->post_select
;
414 rn
->task
.event_handler
= rn_event_handler
;
415 sprintf(rn
->task
.status
, "%s receiver node", rn
->receiver
->name
);
416 register_task(&rn
->task
);
419 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
420 tv_add(now
, &restart_delay
, &afi
[format
].restart_barrier
);
424 static int receiver_running(int format
)
429 struct slot_info
*s
= &slot
[i
];
430 if (s
->format
== format
&& s
->receiver_node
431 && !s
->receiver_node
->eof
)
437 static int open_current_receiver(struct sched
*s
)
441 char *audio_format
= stat_task
->stat_item_values
[SI_FORMAT
];
443 if (!audio_format
|| !stat_task
->pcd
)
445 i
= get_audio_format_num(audio_format
+ strlen(
446 status_item_list
[SI_FORMAT
]) + 1);
449 if (receiver_running(i
))
451 if (tv_diff(now
, &afi
[i
].restart_barrier
, &diff
) < 0) {
455 return open_receiver(i
) < 0? 0 : 1;
458 static unsigned compute_time_diff(const struct timeval
*status_time
)
460 struct timeval tmp
, diff
;
461 static unsigned count
;
462 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
463 const struct timeval max_deviation
= {0, 500 * 1000};
464 const int time_smooth
= 5;
468 sign
= tv_diff(status_time
, now
, &diff
);
469 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
470 // sign, sa_time_diff_sign);
472 sa_time_diff_sign
= sign
;
473 stat_task
->sa_time_diff
= diff
;
478 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
479 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
480 PARA_WARNING_LOG("time diff jump: %lims\n",
484 sa_time_diff_sign
= tv_convex_combination(
485 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
486 count
> 10? sign
: sign
* time_smooth
, &diff
,
488 stat_task
->sa_time_diff
= tmp
;
489 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
492 sa_time_diff_sign
? "+" : "-",
493 tv2ms(&stat_task
->sa_time_diff
)
496 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
500 static void check_stat_line(char *line
)
504 long unsigned sec
, usec
;
507 // PARA_INFO_LOG("line: %s\n", line);
510 itemnum
= stat_line_valid(line
);
512 PARA_WARNING_LOG("invalid status line: %s\n", line
);
515 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
517 tmp
= make_message("%s\n", line
);
518 stat_client_write(tmp
, itemnum
);
520 free(stat_task
->stat_item_values
[itemnum
]);
521 stat_task
->stat_item_values
[itemnum
] = para_strdup(line
);
522 ilen
= strlen(status_item_list
[itemnum
]);
525 stat_task
->playing
= strstr(line
, "playing")? 1 : 0;
528 stat_task
->offset_seconds
= atoi(line
+ ilen
+ 1);
531 stat_task
->length_seconds
= atoi(line
+ ilen
+ 1);
533 case SI_STREAM_START
:
534 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
535 struct timeval a_start
, delay
;
536 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
537 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
538 stat_task
->server_stream_start
.tv_sec
= sec
;
539 stat_task
->server_stream_start
.tv_usec
= usec
;
540 if (compute_time_diff(NULL
) > 2) {
541 if (stat_task
->sa_time_diff_sign
< 0)
542 tv_add(&stat_task
->server_stream_start
,
543 &stat_task
->sa_time_diff
, &a_start
);
545 tv_diff(&stat_task
->server_stream_start
,
546 &stat_task
->sa_time_diff
, &a_start
);
547 tv_add(&a_start
, &delay
, &initial_delay_barrier
);
551 case SI_CURRENT_TIME
:
552 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
553 struct timeval tv
= {sec
, usec
};
554 compute_time_diff(&tv
);
556 if (stat_task
->clock_diff_count
)
557 stat_task
->clock_diff_count
--;
562 static void try_to_close_slot(int slot_num
)
564 struct slot_info
*s
= &slot
[slot_num
];
568 if (s
->receiver_node
&& !s
->receiver_node
->eof
)
570 if (s
->fc
&& !s
->fc
->eof
)
572 if (s
->wng
&& !s
->wng
->eof
)
574 PARA_INFO_LOG("closing slot %d \n", slot_num
);
576 close_filters(s
->fc
);
578 close_receiver(slot_num
);
579 clear_slot(slot_num
);
583 * Check if any receivers/filters/writers need to be started and do so if
584 * neccessary. Since the pre_select function didn't have a chance yet to put
585 * file descriptors into the fd sets given by s, make the upcoming select()
586 * return immediately to avoid a long timeout in case we started something.
588 static void audiod_pre_select(struct sched
*s
, __a_unused
struct task
*t
)
591 struct timeval min_delay
= {0, 1};
594 if (audiod_status
!= AUDIOD_ON
|| !stat_task
->playing
)
595 return kill_all_decoders();
596 if (open_current_receiver(s
))
597 s
->timeout
= min_delay
;
599 struct slot_info
*sl
= &slot
[i
];
600 struct audio_format_info
*a
;
605 a
= &afi
[sl
->format
];
606 if (!sl
->receiver_node
)
608 if (!a
->num_filters
) {
609 if (sl
->receiver_node
->loaded
&& !sl
->wng
) {
611 s
->timeout
= min_delay
;
615 if (sl
->receiver_node
->loaded
&& !sl
->fc
) {
617 s
->timeout
= min_delay
;
620 if (!sl
->fc
|| !*sl
->fc
->out_loaded
|| sl
->wng
)
622 if (tv_diff(now
, &initial_delay_barrier
, &diff
) > 0) {
624 s
->timeout
= min_delay
;
627 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff
));
628 if (tv_diff(&s
->timeout
, &diff
, NULL
) > 0) {
634 static void audiod_post_select(__a_unused
struct sched
*s
,
635 __a_unused
struct task
*t
)
641 try_to_close_slot(i
);
644 static void init_audiod_task(struct task
*t
)
646 t
->pre_select
= audiod_pre_select
;
647 t
->post_select
= audiod_post_select
;
648 t
->event_handler
= NULL
;
650 sprintf(t
->status
, "audiod task");
653 static int parse_stream_command(const char *txt
, char **cmd
)
655 char *p
= strchr(txt
, ':');
659 return -E_MISSING_COLON
;
661 FOR_EACH_AUDIO_FORMAT(i
) {
662 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
667 return -E_UNSUPPORTED_AUDIO_FORMAT
;
670 static int add_filter(int format
, char *cmdline
)
672 struct audio_format_info
*a
= &afi
[format
];
673 int filter_num
, nf
= a
->num_filters
;
675 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
678 a
->filters
[nf
] = &filters
[filter_num
];
680 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
681 a
->filters
[nf
]->name
);
685 static int init_writers(void)
689 struct audio_format_info
*a
;
691 init_supported_writers();
692 nw
= PARA_MAX(1, conf
.writer_given
);
693 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
694 FOR_EACH_AUDIO_FORMAT(i
) {
696 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
697 a
->writers
= para_malloc(nw
* sizeof(struct writer
*));
700 for (i
= 0; i
< conf
.writer_given
; i
++) {
703 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
708 wconf
= check_writer_arg(cmd
, &writer_num
);
713 a
->writers
[nw
] = &writers
[writer_num
];
714 a
->writer_conf
[nw
] = wconf
;
715 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
716 nw
, writer_names
[writer_num
]);
724 static int init_receivers(void)
726 int i
, ret
, receiver_num
;
728 struct audio_format_info
*a
;
730 for (i
= 0; receivers
[i
].name
; i
++) {
731 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
732 receivers
[i
].init(&receivers
[i
]);
734 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
735 char *arg
= conf
.receiver_arg
[i
];
736 char *recv_arg
= strchr(arg
, ':');
737 ret
= -E_MISSING_COLON
;
742 ret
= get_audio_format_num(arg
);
745 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
746 if (!afi
[ret
].receiver_conf
) {
747 ret
= -E_RECV_SYNTAX
;
750 afi
[ret
].receiver
= &receivers
[receiver_num
];
752 /* use the first available receiver with no arguments
753 * for those audio formats for which no receiver
756 cmd
= para_strdup(receivers
[0].name
);
757 FOR_EACH_AUDIO_FORMAT(i
) {
759 if (a
->receiver_conf
)
761 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
762 if (!a
->receiver_conf
)
763 return -E_RECV_SYNTAX
;
764 a
->receiver
= &receivers
[receiver_num
];
772 static int init_default_filters(void)
776 FOR_EACH_AUDIO_FORMAT(i
) {
777 struct audio_format_info
*a
= &afi
[i
];
782 continue; /* no default -- nothing to to */
783 /* add "dec" to audio format name */
784 tmp
= make_message("%sdec", audio_formats
[i
]);
785 for (j
= 0; filters
[j
].name
; j
++)
786 if (!strcmp(tmp
, filters
[j
].name
))
789 ret
= -E_UNSUPPORTED_FILTER
;
790 if (!filters
[j
].name
)
792 tmp
= para_strdup(filters
[j
].name
);
793 ret
= add_filter(i
, tmp
);
797 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
804 static int init_filters(void)
808 filter_init(filters
);
809 nf
= PARA_MAX(1, conf
.filter_given
);
810 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
811 FOR_EACH_AUDIO_FORMAT(i
) {
812 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
813 afi
[i
].filters
= para_malloc(nf
* sizeof(struct filter
*));
815 if (!conf
.no_default_filters_given
)
816 return init_default_filters();
817 for (i
= 0; i
< conf
.filter_given
; i
++) {
818 char *arg
= conf
.filter_arg
[i
];
819 char *filter_name
= strchr(arg
, ':');
820 ret
= -E_MISSING_COLON
;
825 ret
= get_audio_format_num(arg
);
828 ret
= add_filter(ret
, filter_name
);
832 ret
= init_default_filters(); /* use default values for the rest */
837 static int init_stream_io(void)
841 ret
= init_writers();
844 ret
= init_receivers();
847 ret
= init_filters();
853 static int audiod_get_socket(void)
855 struct sockaddr_un unix_addr
;
858 if (conf
.socket_given
)
859 socket_name
= para_strdup(conf
.socket_arg
);
861 char *hn
= para_hostname();
862 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
866 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
867 if (conf
.force_given
)
869 fd
= create_local_socket(socket_name
, &unix_addr
,
870 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
872 PARA_EMERG_LOG("can not connect to socket\n");
873 exit(EXIT_FAILURE
); /* do not unlink socket */
875 if (listen(fd
, 5) < 0) {
876 PARA_EMERG_LOG("can not listen on socket\n");
877 exit(EXIT_FAILURE
); /* do not unlink socket */
879 mark_fd_nonblock(fd
);
883 static void signal_event_handler(struct task
*t
)
885 struct signal_task
*st
= t
->private_data
;
887 switch (st
->signum
) {
891 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
892 clean_exit(EXIT_FAILURE
, "caught deadly signal");
896 static void signal_pre_select(struct sched
*s
, struct task
*t
)
898 struct signal_task
*st
= t
->private_data
;
900 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
903 static void signal_post_select(struct sched
*s
, struct task
*t
)
905 struct signal_task
*st
= t
->private_data
;
907 if (!FD_ISSET(st
->fd
, &s
->rfds
))
909 t
->ret
= -E_SIGNAL_CAUGHT
;
910 st
->signum
= para_next_signal();
913 static void signal_setup_default(struct signal_task
*st
)
915 st
->task
.pre_select
= signal_pre_select
;
916 st
->task
.post_select
= signal_post_select
;
917 st
->task
.private_data
= st
;
918 sprintf(st
->task
.status
, "signal task");
921 static void command_pre_select(struct sched
*s
, struct task
*t
)
923 struct command_task
*ct
= t
->private_data
;
925 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
929 static void command_post_select(struct sched
*s
, struct task
*t
)
932 struct command_task
*ct
= t
->private_data
;
934 t
->ret
= 1; /* always successful */
935 audiod_status_dump();
936 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
938 ret
= handle_connect(ct
->fd
);
940 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
943 static void init_command_task(struct command_task
*ct
)
945 ct
->task
.pre_select
= command_pre_select
;
946 ct
->task
.post_select
= command_post_select
;
947 ct
->task
.event_handler
= NULL
;
948 ct
->task
.private_data
= ct
;
949 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
950 sprintf(ct
->task
.status
, "command task");
953 static void close_stat_pipe(void)
959 client_close(stat_task
->pcd
);
960 stat_task
->pcd
= NULL
;
961 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
962 free(stat_task
->stat_item_values
[i
]);
963 stat_task
->stat_item_values
[i
] = NULL
;
966 stat_task
->length_seconds
= 0;
967 stat_task
->offset_seconds
= 0;
968 audiod_status_dump();
969 stat_task
->playing
= 0;
970 stat_task
->stat_item_values
[SI_STATUS_BAR
] = make_message(
971 "%s:no connection to para_server\n",
972 status_item_list
[SI_STATUS_BAR
]);
973 stat_client_write(stat_task
->stat_item_values
[SI_STATUS_BAR
],
975 if (stat_task
->clock_diff_count
) {
976 stat_task
->clock_diff_barrier
.tv_sec
= now
->tv_sec
+ 1;
977 stat_task
->clock_diff_barrier
.tv_usec
= now
->tv_usec
;
982 * close the connection to para_server and exit
984 * \param status the exit status which is passed to exit(3)
985 * \param msg the log message
987 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
988 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
993 void __noreturn
clean_exit(int status
, const char *msg
)
995 PARA_EMERG_LOG("%s\n", msg
);
1002 /* avoid busy loop if server is down */
1003 static void set_stat_task_restart_barrier(void)
1005 struct timeval delay
= {5, 0};
1006 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
1009 static void client_task_event_handler(__a_unused
struct task
*t
)
1013 if (t
->ret
== -E_HANDSHAKE_COMPLETE
)
1017 if (t
->ret
!= -E_SERVER_EOF
)
1018 stat_task
->clock_diff_count
= conf
.clock_diff_count_arg
;
1019 set_stat_task_restart_barrier();
1020 FOR_EACH_AUDIO_FORMAT(i
)
1021 afi
[i
].restart_barrier
= stat_task
->restart_barrier
;
1024 static void status_pre_select(struct sched
*s
, struct task
*t
)
1026 struct status_task
*st
= t
->private_data
;
1029 t
->ret
= 1; /* always successful */
1030 if (st
->pcd
|| audiod_status
== AUDIOD_OFF
)
1032 if (!st
->clock_diff_count
&& tv_diff(now
, &st
->restart_barrier
, NULL
)
1035 if (st
->clock_diff_count
) {
1036 char *argv
[] = {"audiod", "stat", "1", NULL
};
1038 if (tv_diff(now
, &st
->clock_diff_barrier
, NULL
) < 0)
1040 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1041 ret
= client_open(argc
, argv
, &st
->pcd
);
1044 char *argv
[] = {"audiod", "stat", NULL
};
1046 ret
= client_open(argc
, argv
, &st
->pcd
);
1048 set_stat_task_restart_barrier();
1051 st
->pcd
->task
.event_handler
= client_task_event_handler
;
1052 s
->timeout
.tv_sec
= 0;
1053 s
->timeout
.tv_usec
= 1;
1056 static void status_post_select(__a_unused
struct sched
*s
, struct task
*t
)
1058 struct status_task
*st
= t
->private_data
;
1059 unsigned bytes_left
;
1062 if (!st
->pcd
|| st
->pcd
->status
!= CL_RECEIVING
)
1064 if (st
->pcd
&& audiod_status
== AUDIOD_OFF
) {
1065 unregister_task(&st
->pcd
->task
);
1067 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1070 bytes_left
= for_each_line(st
->pcd
->buf
, st
->pcd
->loaded
,
1072 if (st
->pcd
->loaded
!= bytes_left
) {
1073 st
->last_status_read
= *now
;
1074 st
->pcd
->loaded
= bytes_left
;
1076 struct timeval diff
;
1077 tv_diff(now
, &st
->last_status_read
, &diff
);
1078 if (diff
.tv_sec
> 61)
1083 static void init_status_task(struct status_task
*st
)
1085 memset(st
, 0, sizeof(struct status_task
));
1086 st
->task
.pre_select
= status_pre_select
;
1087 st
->task
.post_select
= status_post_select
;
1088 st
->task
.private_data
= st
;
1089 st
->sa_time_diff_sign
= 1;
1090 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1091 sprintf(st
->task
.status
, "status task");
1094 static void set_initial_status(void)
1096 audiod_status
= AUDIOD_ON
;
1097 if (!conf
.mode_given
)
1099 if (!strcmp(conf
.mode_arg
, "sb")) {
1100 audiod_status
= AUDIOD_STANDBY
;
1103 if (!strcmp(conf
.mode_arg
, "off")) {
1104 audiod_status
= AUDIOD_OFF
;
1107 if (strcmp(conf
.mode_arg
, "on"))
1108 PARA_WARNING_LOG("%s", "invalid mode\n");
1112 * the main function of para_audiod
1114 * \param argc usual argument count
1115 * \param argv usual argument vector
1117 * \return EXIT_SUCCESS or EXIT_FAILURE
1119 * \sa para_audiod(1)
1121 int main(int argc
, char *argv
[])
1126 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1127 struct task audiod_task_struct
, *audiod_task
= &audiod_task_struct
;
1130 audiod_cmdline_parser(argc
, argv
, &conf
);
1131 HANDLE_VERSION_FLAG("audiod", conf
);
1132 para_drop_privileges(conf
.user_arg
, conf
.group_arg
);
1133 cf
= configfile_exists();
1135 struct audiod_cmdline_parser_params params
= {
1138 .check_required
= 0,
1139 .check_ambiguity
= 0
1142 if (audiod_cmdline_parser_config_file(cf
, &conf
, ¶ms
)) {
1143 PARA_EMERG_LOG("%s", "parse error in config file\n");
1147 if (conf
.logfile_given
)
1148 logfile
= open_log(conf
.logfile_arg
);
1149 log_welcome("para_audiod", conf
.loglevel_arg
);
1150 i
= init_stream_io();
1152 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i
));
1155 server_uptime(UPTIME_SET
);
1156 set_initial_status();
1160 setup_signal_handling();
1161 signal_setup_default(sig_task
);
1162 sig_task
->task
.event_handler
= signal_event_handler
;
1164 init_status_task(stat_task
);
1165 init_command_task(cmd_task
);
1166 init_audiod_task(audiod_task
);
1168 if (conf
.daemon_given
)
1171 register_task(&sig_task
->task
);
1172 register_task(&cmd_task
->task
);
1173 register_task(&stat_task
->task
);
1174 register_task(audiod_task
);
1175 s
.default_timeout
.tv_sec
= 0;
1176 s
.default_timeout
.tv_usec
= 99 * 1000;
1179 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
1180 return EXIT_FAILURE
;