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 */
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
;
95 /** The offset value announced by para_server. */
97 /** The length of the current audio file as announced by para_server. */
99 /** The start of the current stream from the view of para_server. */
100 struct timeval server_stream_start
;
101 /** The average time deviation between para_server and para_audiod. */
102 struct timeval sa_time_diff
;
103 /** Whether client time is ahead of server time. */
104 int sa_time_diff_sign
;
105 /** The 'P' and the 'N' flags as announced by para_server. */
106 enum vss_status_flags vss_status
;
107 /** Number of times the clock difference is to be checked. */
108 unsigned clock_diff_count
;
109 /** When to start the next check for clock difference. */
110 struct timeval clock_diff_barrier
;
111 /** Number of the audio format as announced by para_server. */
112 int current_audio_format_num
;
115 /** The array of status items sent by para_server. */
116 char *stat_item_values
[NUM_STAT_ITEMS
] = {NULL
};
119 * the current mode of operation of which can be changed by the on/off/cycle
120 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
122 int audiod_status
= AUDIOD_ON
;
125 * the gengetopt args_info struct that holds information on all command line
128 struct audiod_args_info conf
;
130 static char *socket_name
;
131 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
133 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
135 static struct status_task status_task_struct
;
138 * the task that calls the status command of para_server
140 * \sa struct status_task
142 static struct status_task
*stat_task
= &status_task_struct
;
143 static struct timeval initial_delay_barrier
;
146 * the task for handling audiod commands
148 * \sa struct task, struct sched
150 struct command_task
{
151 /** the local listening socket */
153 /** the associated task structure */
157 /** iterate over all supported audio formats */
158 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
161 * get the audio format number
162 * \param name the name of the audio format
164 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
165 * \a name is not a supported audio format.
167 int get_audio_format_num(const char *name
)
171 while (para_isspace(*name
))
173 FOR_EACH_AUDIO_FORMAT(i
)
174 if (!strcmp(name
, audio_formats
[i
]))
176 return -E_UNSUPPORTED_AUDIO_FORMAT
;
179 char *get_time_string(int slot_num
)
181 int ret
, seconds
= 0, length
;
182 struct timeval
*tmp
, sum
, sss
, /* server stream start */
183 wtime
, /* now - writer start */
184 rskip
; /* receiver start - sss */
185 struct slot_info
*s
= slot_num
< 0? NULL
: &slot
[slot_num
];
187 if (audiod_status
== AUDIOD_OFF
)
189 if (!(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
)) {
190 if (stat_task
->length_seconds
) /* paused */
192 goto empty
; /* stopped */
194 if (audiod_status
== AUDIOD_ON
&& !s
)
196 /* valid status items and playing */
197 if (s
) { /* writer active in this slot */
198 length
= s
->seconds_total
;
199 tmp
= &s
->server_stream_start
;
200 } else { /* standby mode, rely on status items */
201 length
= stat_task
->length_seconds
;
202 tmp
= &stat_task
->server_stream_start
;
204 if (stat_task
->sa_time_diff_sign
> 0)
205 tv_diff(tmp
, &stat_task
->sa_time_diff
, &sss
);
207 tv_add(tmp
, &stat_task
->sa_time_diff
, &sss
);
210 tv_diff(now
, &sss
, &diff
);
211 seconds
= diff
.tv_sec
+ stat_task
->offset_seconds
;
214 tv_diff(now
, &s
->wstime
, &wtime
);
215 seconds
= s
->offset_seconds
;
216 ret
= tv_diff(&s
->rstime
, &sss
, &rskip
);
217 if (ret
> 0) { /* audiod was started in the middle of the stream */
218 tv_add(&wtime
, &rskip
, &sum
);
219 seconds
+= sum
.tv_sec
;
221 seconds
+= wtime
.tv_sec
;
223 seconds
= PARA_MIN(seconds
, length
);
224 seconds
= PARA_MAX(seconds
, 0);
226 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
230 (length
- seconds
) / 60,
231 (length
- seconds
) % 60,
232 length
? (seconds
* 100 + length
/ 2) / length
: 0,
237 return para_strdup(NULL
);
240 static int want_colors(void)
242 if (conf
.color_arg
== color_arg_no
)
244 if (conf
.color_arg
== color_arg_yes
)
246 if (conf
.logfile_given
)
248 return isatty(STDERR_FILENO
);
251 static void parse_config_or_die(void)
255 struct audiod_cmdline_parser_params params
= {
259 .check_ambiguity
= 0,
263 if (conf
.config_file_given
)
264 config_file
= para_strdup(conf
.config_file_arg
);
266 char *home
= para_homedir();
267 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
270 ret
= file_exists(config_file
);
271 if (conf
.config_file_given
&& !ret
) {
272 PARA_EMERG_LOG("can not read config file %s\n", config_file
);
276 audiod_cmdline_parser_config_file(config_file
, &conf
, ¶ms
);
278 daemon_set_loglevel(conf
.loglevel_arg
);
285 static void setup_signal_handling(void)
287 sig_task
->fd
= para_signal_init();
288 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
289 para_install_sighandler(SIGINT
);
290 para_install_sighandler(SIGTERM
);
291 para_install_sighandler(SIGHUP
);
292 para_sigaction(SIGPIPE
, SIG_IGN
);
295 static void clear_slot(int slot_num
)
297 struct slot_info
*s
= &slot
[slot_num
];
299 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
300 memset(s
, 0, sizeof(struct slot_info
));
304 static void close_receiver(int slot_num
)
306 struct slot_info
*s
= &slot
[slot_num
];
307 struct audio_format_info
*a
;
309 if (s
->format
< 0 || !s
->receiver_node
)
312 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
313 audio_formats
[s
->format
], slot_num
);
314 a
->receiver
->close(s
->receiver_node
);
315 free(s
->receiver_node
);
316 s
->receiver_node
= NULL
;
317 stat_task
->current_audio_format_num
= -1;
320 static void kill_all_decoders(int error
)
325 struct slot_info
*s
= &slot
[i
];
326 if (s
->wng
&& s
->wng
->task
.error
>= 0) {
327 PARA_INFO_LOG("deactivating wng in slot %d\n",
329 s
->wng
->task
.error
= error
;
331 if (s
->fc
&& s
->fc
->task
.error
>= 0) {
332 PARA_INFO_LOG("deactivatimg filter chain in slot %d\n", i
);
333 s
->fc
->task
.error
= error
;
335 if (s
->receiver_node
&& s
->receiver_node
->task
.error
>= 0) {
336 PARA_INFO_LOG("deactivating receiver_node in slot %d\n", i
);
337 s
->receiver_node
->task
.error
= error
;
342 static int get_empty_slot(void)
353 if (s
->wng
|| s
->receiver_node
|| s
->fc
)
358 return -E_NO_MORE_SLOTS
;
362 * get the number of filters
364 * \param audio_format_num the number identifying the audio format
366 * \return the number of filters for the given audio format
370 int num_filters(int audio_format_num
)
372 return afi
[audio_format_num
].num_filters
;
375 static void open_filters(int slot_num
)
377 struct slot_info
*s
= &slot
[slot_num
];
378 struct audio_format_info
*a
= &afi
[s
->format
];
379 struct filter_node
*fn
;
380 int nf
= a
->num_filters
;
386 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
387 s
->fc
= para_calloc(sizeof(struct filter_chain
));
388 s
->fc
->filter_nodes
= para_malloc(nf
* sizeof(struct filter_node
));
389 s
->fc
->inbufp
= &s
->receiver_node
->buf
;
390 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
391 s
->fc
->input_error
= &s
->receiver_node
->task
.error
;
392 s
->fc
->task
.pre_select
= NULL
;
393 s
->fc
->task
.post_select
= filter_post_select
;
394 s
->fc
->task
.error
= 0;
395 s
->fc
->num_filters
= nf
;
397 s
->receiver_node
->output_error
= &s
->fc
->task
.error
;
398 sprintf(s
->fc
->task
.status
, "filter chain");
399 FOR_EACH_FILTER_NODE(fn
, s
->fc
, i
) {
400 struct filter
*f
= filters
+ a
->filter_nums
[i
];
401 fn
->filter_num
= a
->filter_nums
[i
];
402 fn
->conf
= a
->filter_conf
[i
];
405 INIT_LIST_HEAD(&fn
->callbacks
);
407 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
408 audio_formats
[s
->format
], i
, nf
, f
->name
, slot_num
);
409 s
->fc
->outbufp
= &fn
->buf
;
410 s
->fc
->out_loaded
= &fn
->loaded
;
412 register_task(&s
->fc
->task
);
415 static void open_writers(int slot_num
)
418 struct slot_info
*s
= &slot
[slot_num
];
419 struct audio_format_info
*a
= &afi
[s
->format
];
421 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
423 s
->wng
= setup_default_wng();
425 s
->wng
= wng_new(a
->num_writers
);
427 s
->wng
->bufp
= s
->fc
->outbufp
;
428 s
->wng
->loaded
= s
->fc
->out_loaded
;
429 s
->wng
->input_error
= &s
->fc
->task
.error
;
430 s
->wng
->channels
= &s
->fc
->channels
;
431 s
->wng
->samplerate
= &s
->fc
->samplerate
;
432 s
->fc
->output_error
= &s
->wng
->task
.error
;
433 PARA_INFO_LOG("samplerate: %d\n", *s
->wng
->samplerate
);
435 s
->wng
->bufp
= &s
->receiver_node
->buf
;
436 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
437 s
->wng
->input_error
= &s
->receiver_node
->task
.error
;
439 for (i
= 0; i
< a
->num_writers
; i
++) {
440 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
441 s
->wng
->writer_nodes
[i
].writer_num
= a
->writer_nums
[i
];
443 ret
= wng_open(s
->wng
);
447 s
->server_stream_start
= stat_task
->server_stream_start
.tv_sec
?
448 stat_task
->server_stream_start
: *now
;
449 s
->offset_seconds
= stat_task
->offset_seconds
;
450 s
->seconds_total
= stat_task
->length_seconds
;
451 activate_inactive_grab_clients(s
->format
, s
->fc
);
454 static int open_receiver(int format
)
456 struct audio_format_info
*a
= &afi
[format
];
459 struct receiver_node
*rn
;
460 const struct timeval restart_delay
= {2, 0};
462 ret
= get_empty_slot();
468 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
469 rn
= s
->receiver_node
;
470 rn
->receiver
= a
->receiver
;
471 rn
->conf
= a
->receiver_conf
;
472 ret
= a
->receiver
->open(s
->receiver_node
);
474 free(s
->receiver_node
);
475 s
->receiver_node
= NULL
;
478 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
479 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
480 rn
->task
.pre_select
= a
->receiver
->pre_select
;
481 rn
->task
.post_select
= a
->receiver
->post_select
;
483 sprintf(rn
->task
.status
, "%s receiver node", rn
->receiver
->name
);
484 register_task(&rn
->task
);
488 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
489 tv_add(now
, &restart_delay
, &afi
[format
].restart_barrier
);
493 /* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
494 static int receiver_running(int format
)
499 struct slot_info
*s
= &slot
[i
];
500 if (s
->format
!= format
)
502 if (!s
->receiver_node
)
504 if (s
->receiver_node
->task
.error
>= 0)
511 static void open_current_receiver(struct sched
*s
)
514 int ret
, cafn
= stat_task
->current_audio_format_num
;
516 if (cafn
< 0 || !stat_task
->ct
)
518 /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
519 if (stat_task
->vss_status
!= VSS_STATUS_FLAG_PLAYING
)
521 ret
= receiver_running(cafn
);
522 if (ret
> 0) /* already running and not eof */
524 if (ret
< 0) { /* eof */
526 * para_server uses a zero start time during the announcement
527 * period, i.e. before it sends the first chunk. Wait until
528 * this period begins to avoid restarting the receiver that
529 * belongs to the file just completed.
531 if (stat_task
->server_stream_start
.tv_sec
)
534 if (tv_diff(now
, &afi
[cafn
].restart_barrier
, &diff
) < 0) {
535 /* avoid busy loop */
539 /* start a new receiver */
543 static unsigned compute_time_diff(const struct timeval
*status_time
)
545 struct timeval tmp
, diff
;
546 static unsigned count
;
547 int sign
, sa_time_diff_sign
= stat_task
->sa_time_diff_sign
;
548 const struct timeval max_deviation
= {0, 500 * 1000};
549 const int time_smooth
= 5;
553 sign
= tv_diff(status_time
, now
, &diff
);
554 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
555 // sign, sa_time_diff_sign);
557 sa_time_diff_sign
= sign
;
558 stat_task
->sa_time_diff
= diff
;
563 int s
= tv_diff(&diff
, &stat_task
->sa_time_diff
, &tmp
);
564 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
565 PARA_WARNING_LOG("time diff jump: %lims\n",
569 sa_time_diff_sign
= tv_convex_combination(
570 sa_time_diff_sign
* time_smooth
, &stat_task
->sa_time_diff
,
571 count
> 10? sign
: sign
* time_smooth
, &diff
,
573 stat_task
->sa_time_diff
= tmp
;
574 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
577 sa_time_diff_sign
? "+" : "-",
578 tv2ms(&stat_task
->sa_time_diff
)
581 stat_task
->sa_time_diff_sign
= sa_time_diff_sign
;
585 static int update_item(int itemnum
, char *buf
)
587 long unsigned sec
, usec
;
589 if (stat_task
->clock_diff_count
&& itemnum
!= SI_CURRENT_TIME
)
591 free(stat_item_values
[itemnum
]);
592 stat_item_values
[itemnum
] = para_strdup(buf
);
593 stat_client_write_item(itemnum
);
595 case SI_STATUS_FLAGS
:
596 stat_task
->vss_status
= 0;
597 if (strchr(buf
, 'N'))
598 stat_task
->vss_status
|= VSS_STATUS_FLAG_NEXT
;
599 if (strchr(buf
, 'P'))
600 stat_task
->vss_status
|= VSS_STATUS_FLAG_PLAYING
;
603 stat_task
->offset_seconds
= atoi(buf
);
605 case SI_SECONDS_TOTAL
:
606 stat_task
->length_seconds
= atoi(buf
);
608 case SI_STREAM_START
:
609 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
610 struct timeval a_start
, delay
;
611 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
612 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
613 stat_task
->server_stream_start
.tv_sec
= sec
;
614 stat_task
->server_stream_start
.tv_usec
= usec
;
615 if (compute_time_diff(NULL
) > 2) {
616 if (stat_task
->sa_time_diff_sign
< 0)
617 tv_add(&stat_task
->server_stream_start
,
618 &stat_task
->sa_time_diff
, &a_start
);
620 tv_diff(&stat_task
->server_stream_start
,
621 &stat_task
->sa_time_diff
, &a_start
);
622 tv_add(&a_start
, &delay
, &initial_delay_barrier
);
626 case SI_CURRENT_TIME
:
627 if (sscanf(buf
, "%lu.%lu", &sec
, &usec
) == 2) {
628 struct timeval tv
= {sec
, usec
};
629 compute_time_diff(&tv
);
633 stat_task
->current_audio_format_num
634 = get_audio_format_num(buf
);
639 static int parse_stream_command(const char *txt
, char **cmd
)
641 char *p
= strchr(txt
, ':');
645 return -E_MISSING_COLON
;
647 FOR_EACH_AUDIO_FORMAT(i
) {
648 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
653 return -E_UNSUPPORTED_AUDIO_FORMAT
;
656 static int add_filter(int format
, char *cmdline
)
658 struct audio_format_info
*a
= &afi
[format
];
659 int filter_num
, nf
= a
->num_filters
;
661 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
664 a
->filter_nums
[nf
] = filter_num
;
666 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
,
667 filters
[filter_num
].name
);
671 static int parse_writer_args(void)
675 struct audio_format_info
*a
;
677 nw
= PARA_MAX(1U, conf
.writer_given
);
678 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
679 FOR_EACH_AUDIO_FORMAT(i
) {
681 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
682 a
->writer_nums
= para_malloc(nw
* sizeof(int));
685 for (i
= 0; i
< conf
.writer_given
; i
++) {
688 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
693 wconf
= check_writer_arg(cmd
, &writer_num
);
698 a
->writer_nums
[nw
] = writer_num
;
699 a
->writer_conf
[nw
] = wconf
;
700 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
701 nw
, writer_names
[writer_num
]);
709 static int parse_receiver_args(void)
711 int i
, ret
, receiver_num
;
713 struct audio_format_info
*a
;
715 for (i
= conf
.receiver_given
- 1; i
>= 0; i
--) {
716 char *arg
= conf
.receiver_arg
[i
];
717 char *recv_arg
= strchr(arg
, ':');
718 ret
= -E_MISSING_COLON
;
723 ret
= get_audio_format_num(arg
);
726 afi
[ret
].receiver_conf
= check_receiver_arg(recv_arg
, &receiver_num
);
727 if (!afi
[ret
].receiver_conf
) {
728 ret
= -E_RECV_SYNTAX
;
731 afi
[ret
].receiver
= &receivers
[receiver_num
];
733 /* use the first available receiver with no arguments
734 * for those audio formats for which no receiver
737 cmd
= para_strdup(receivers
[0].name
);
738 FOR_EACH_AUDIO_FORMAT(i
) {
740 if (a
->receiver_conf
)
742 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
743 if (!a
->receiver_conf
)
744 return -E_RECV_SYNTAX
;
745 a
->receiver
= &receivers
[receiver_num
];
753 static int init_default_filters(void)
757 FOR_EACH_AUDIO_FORMAT(i
) {
758 struct audio_format_info
*a
= &afi
[i
];
763 continue; /* no default -- nothing to to */
764 /* add "dec" to audio format name */
765 tmp
= make_message("%sdec", audio_formats
[i
]);
766 for (j
= 0; filters
[j
].name
; j
++)
767 if (!strcmp(tmp
, filters
[j
].name
))
770 ret
= -E_UNSUPPORTED_FILTER
;
771 if (!filters
[j
].name
)
773 tmp
= para_strdup(filters
[j
].name
);
774 ret
= add_filter(i
, tmp
);
778 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
785 static int parse_filter_args(void)
789 nf
= PARA_MAX(1U, conf
.filter_given
);
790 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
791 FOR_EACH_AUDIO_FORMAT(i
) {
792 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
793 afi
[i
].filter_nums
= para_malloc(nf
* sizeof(unsigned));
795 if (!conf
.no_default_filters_given
)
796 return init_default_filters();
797 for (i
= 0; i
< conf
.filter_given
; i
++) {
798 char *arg
= conf
.filter_arg
[i
];
799 char *filter_name
= strchr(arg
, ':');
800 ret
= -E_MISSING_COLON
;
805 ret
= get_audio_format_num(arg
);
808 ret
= add_filter(ret
, filter_name
);
812 ret
= init_default_filters(); /* use default values for the rest */
817 static int parse_stream_args(void)
821 ret
= parse_receiver_args();
824 ret
= parse_filter_args();
827 ret
= parse_writer_args();
833 /* does not unlink socket on errors */
834 static int audiod_get_socket(void)
836 struct sockaddr_un unix_addr
;
839 if (conf
.socket_given
)
840 socket_name
= para_strdup(conf
.socket_arg
);
842 char *hn
= para_hostname();
843 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
847 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
848 if (conf
.force_given
)
850 ret
= create_local_socket(socket_name
, &unix_addr
,
851 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
855 if (listen(fd
, 5) < 0) {
856 ret
= -ERRNO_TO_PARA_ERROR(errno
);
859 ret
= mark_fd_nonblocking(fd
);
864 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
868 static void signal_pre_select(struct sched
*s
, struct task
*t
)
870 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
871 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
874 static void signal_post_select(struct sched
*s
, struct task
*t
)
876 struct signal_task
*st
= container_of(t
, struct signal_task
, task
);
878 if (!FD_ISSET(st
->fd
, &s
->rfds
))
881 st
->signum
= para_next_signal();
882 switch (st
->signum
) {
886 PARA_EMERG_LOG("terminating on signal %d\n", st
->signum
);
887 clean_exit(EXIT_FAILURE
, "caught deadly signal");
891 static void signal_setup_default(struct signal_task
*st
)
893 st
->task
.pre_select
= signal_pre_select
;
894 st
->task
.post_select
= signal_post_select
;
895 sprintf(st
->task
.status
, "signal task");
898 static void command_pre_select(struct sched
*s
, struct task
*t
)
900 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
901 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
904 static void command_post_select(struct sched
*s
, struct task
*t
)
907 struct command_task
*ct
= container_of(t
, struct command_task
, task
);
908 static struct timeval last_status_dump
;
911 tv_add(&last_status_dump
, &(struct timeval
){0, 500 * 1000}, &tmp
);
912 if (tv_diff(&tmp
, now
, NULL
) < 0) {
913 audiod_status_dump();
914 last_status_dump
= *now
;
917 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
919 ret
= handle_connect(ct
->fd
);
921 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));
924 static void init_command_task(struct command_task
*ct
)
926 ct
->task
.pre_select
= command_pre_select
;
927 ct
->task
.post_select
= command_post_select
;
929 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
930 sprintf(ct
->task
.status
, "command task");
933 static void close_stat_pipe(void)
937 client_close(stat_task
->ct
);
938 stat_task
->ct
= NULL
;
939 clear_and_dump_items();
940 stat_task
->length_seconds
= 0;
941 stat_task
->offset_seconds
= 0;
942 stat_task
->vss_status
= 0;
943 stat_task
->current_audio_format_num
= -1;
944 audiod_status_dump();
948 * close the connection to para_server and exit
950 * \param status the exit status which is passed to exit(3)
951 * \param msg the log message
953 * Log \a msg with loglevel \p EMERG, close the connection to para_server if
954 * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
959 void __noreturn
clean_exit(int status
, const char *msg
)
961 PARA_EMERG_LOG("%s\n", msg
);
968 /* avoid busy loop if server is down */
969 static void set_stat_task_restart_barrier(unsigned seconds
)
971 struct timeval delay
= {seconds
, 0};
972 tv_add(now
, &delay
, &stat_task
->restart_barrier
);
975 static void try_to_close_slot(int slot_num
)
977 struct slot_info
*s
= &slot
[slot_num
];
981 if (s
->receiver_node
&& s
->receiver_node
->task
.error
!= -E_TASK_UNREGISTERED
)
983 if (s
->fc
&& s
->fc
->task
.error
!= -E_TASK_UNREGISTERED
)
985 if (s
->wng
&& s
->wng
->task
.error
!= -E_TASK_UNREGISTERED
)
987 PARA_INFO_LOG("closing slot %d\n", slot_num
);
989 close_filters(s
->fc
);
991 close_receiver(slot_num
);
992 clear_slot(slot_num
);
996 * Check if any receivers/filters/writers need to be started and do so if
999 static void start_stop_decoders(struct sched
*s
)
1004 try_to_close_slot(i
);
1005 if (audiod_status
!= AUDIOD_ON
||
1006 !(stat_task
->vss_status
& VSS_STATUS_FLAG_PLAYING
))
1007 return kill_all_decoders(-E_NOT_PLAYING
);
1008 open_current_receiver(s
);
1010 struct slot_info
*sl
= &slot
[i
];
1011 struct audio_format_info
*a
;
1012 struct timeval diff
;
1016 a
= &afi
[sl
->format
];
1017 if (!sl
->receiver_node
)
1019 if ((!a
->num_filters
|| sl
->fc
) && sl
->wng
)
1020 continue; /* everything already started */
1021 if (!a
->num_filters
) {
1022 if (sl
->receiver_node
->loaded
&& !sl
->wng
) {
1027 if (sl
->receiver_node
->loaded
&& !sl
->fc
) {
1031 if (sl
->wng
|| !sl
->fc
|| !*sl
->fc
->out_loaded
)
1033 if (tv_diff(now
, &initial_delay_barrier
, &diff
) > 0) {
1037 PARA_INFO_LOG("initial delay: %lu ms left\n", tv2ms(&diff
));
1038 if (tv_diff(&s
->timeout
, &diff
, NULL
) > 0) {
1045 /* restart the client task if necessary */
1046 static void status_pre_select(struct sched
*s
, struct task
*t
)
1048 struct status_task
*st
= container_of(t
, struct status_task
, task
);
1050 if (audiod_status
== AUDIOD_OFF
) {
1053 if (st
->ct
->task
.error
>= 0) {
1054 st
->ct
->task
.error
= -E_AUDIOD_OFF
;
1057 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1060 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1065 if (st
->ct
->task
.error
< 0) {
1066 if (st
->ct
->task
.error
!= -E_TASK_UNREGISTERED
)
1071 if (st
->ct
->status
!= CL_RECEIVING
)
1073 ret
= for_each_stat_item(st
->ct
->buf
, st
->ct
->loaded
,
1076 st
->ct
->task
.error
= ret
;
1079 if (st
->ct
->loaded
!= ret
) {
1080 st
->last_status_read
= *now
;
1081 st
->ct
->loaded
= ret
;
1083 struct timeval diff
;
1084 tv_diff(now
, &st
->last_status_read
, &diff
);
1085 if (diff
.tv_sec
> 61)
1086 st
->ct
->task
.error
= -E_STATUS_TIMEOUT
;
1090 if (tv_diff(now
, &st
->restart_barrier
, NULL
) < 0)
1092 if (st
->clock_diff_count
) { /* get status only one time */
1093 char *argv
[] = {"audiod", "--", "stat", "-p", "1", NULL
};
1095 PARA_INFO_LOG("clock diff count: %d\n", st
->clock_diff_count
);
1096 st
->clock_diff_count
--;
1097 client_open(argc
, argv
, &st
->ct
, NULL
);
1098 set_stat_task_restart_barrier(2);
1101 char *argv
[] = {"audiod", "--", "stat", "-p", NULL
};
1103 client_open(argc
, argv
, &st
->ct
, NULL
);
1104 set_stat_task_restart_barrier(5);
1106 free(stat_item_values
[SI_BASENAME
]);
1107 stat_item_values
[SI_BASENAME
] = para_strdup(
1108 "no connection to para_server");
1109 stat_client_write_item(SI_BASENAME
);
1110 st
->last_status_read
= *now
;
1112 start_stop_decoders(s
);
1115 static void init_status_task(struct status_task
*st
)
1117 memset(st
, 0, sizeof(struct status_task
));
1118 st
->task
.pre_select
= status_pre_select
;
1119 st
->sa_time_diff_sign
= 1;
1120 st
->clock_diff_count
= conf
.clock_diff_count_arg
;
1121 st
->current_audio_format_num
= -1;
1122 sprintf(st
->task
.status
, "status task");
1125 static void set_initial_status(void)
1127 audiod_status
= AUDIOD_ON
;
1128 if (!conf
.mode_given
)
1130 if (!strcmp(conf
.mode_arg
, "sb")) {
1131 audiod_status
= AUDIOD_STANDBY
;
1134 if (!strcmp(conf
.mode_arg
, "off")) {
1135 audiod_status
= AUDIOD_OFF
;
1138 if (strcmp(conf
.mode_arg
, "on"))
1139 PARA_WARNING_LOG("invalid mode\n");
1142 __noreturn
static void print_help_and_die(void)
1144 int d
= conf
.detailed_help_given
;
1145 const char **p
= d
? audiod_args_info_detailed_help
1146 : audiod_args_info_help
;
1148 printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE
"-"
1149 AUDIOD_CMDLINE_PARSER_VERSION
);
1150 printf_or_die("%s\n\n", audiod_args_info_usage
);
1152 printf_or_die("%s\n", *p
);
1153 print_receiver_helps(d
);
1154 print_filter_helps(d
);
1155 print_writer_helps(d
);
1159 static void init_colors_or_die(void)
1165 daemon_set_default_log_colors();
1166 daemon_set_flag(DF_COLOR_LOG
);
1167 for (i
= 0; i
< conf
.log_color_given
; i
++) {
1168 ret
= daemon_set_log_color(conf
.log_color_arg
[i
]);
1175 * the main function of para_audiod
1177 * \param argc usual argument count
1178 * \param argv usual argument vector
1180 * \return EXIT_SUCCESS or EXIT_FAILURE
1182 * \sa para_audiod(1)
1184 int main(int argc
, char *argv
[])
1187 static struct sched s
;
1188 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1189 struct audiod_cmdline_parser_params params
= {
1192 .check_required
= 0,
1193 .check_ambiguity
= 0,
1198 if (audiod_cmdline_parser_ext(argc
, argv
, &conf
, ¶ms
))
1200 HANDLE_VERSION_FLAG("audiod", conf
);
1201 /* init receivers/filters/writers early to make help work */
1205 if (conf
.help_given
|| conf
.detailed_help_given
)
1206 print_help_and_die();
1207 drop_privileges_or_die(conf
.user_arg
, conf
.group_arg
);
1208 parse_config_or_die();
1209 init_colors_or_die();
1210 init_random_seed_or_die();
1211 daemon_set_flag(DF_LOG_TIME
);
1212 daemon_set_flag(DF_LOG_HOSTNAME
);
1213 daemon_set_flag(DF_LOG_LL
);
1214 if (conf
.log_timing_given
)
1215 daemon_set_flag(DF_LOG_TIMING
);
1216 if (conf
.logfile_given
) {
1217 daemon_set_logfile(conf
.logfile_arg
);
1218 daemon_open_log_or_die();
1220 ret
= parse_stream_args();
1222 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1225 log_welcome("para_audiod");
1226 server_uptime(UPTIME_SET
);
1227 set_initial_status();
1231 setup_signal_handling();
1232 signal_setup_default(sig_task
);
1234 init_status_task(stat_task
);
1235 init_command_task(cmd_task
);
1237 if (conf
.daemon_given
)
1240 register_task(&sig_task
->task
);
1241 register_task(&cmd_task
->task
);
1242 register_task(&stat_task
->task
);
1243 s
.default_timeout
.tv_sec
= 0;
1244 s
.default_timeout
.tv_usec
= 999 * 1000;
1247 PARA_EMERG_LOG("%s\n", para_strerror(-ret
));
1248 return EXIT_FAILURE
;