2 * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
19 /** \file audiod.c the paraslash's audio daemon */
23 #include "audiod.cmdline.h"
25 #include "close_on_fork.h"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
39 #include "write_common.h"
41 /** define the array of error lists needed by para_audiod */
43 /** define the array containing all supported audio formats */
44 DEFINE_AUDIO_FORMAT_ARRAY
;
47 * the possible modes of operation
49 * - off: disconnect from para_server
50 * - on: receive status information from para_server and play the audio stream
51 * - sb: only receive status information but not the audio stream
53 enum {AUDIOD_OFF
, AUDIOD_ON
, AUDIOD_STANDBY
};
55 /** defines how to handle one supported audio format */
56 struct audio_format_info
{
57 /** pointer to the receiver for this audio format */
58 struct receiver
*receiver
;
59 /** the receiver configuration */
61 /** the number of filters that should be activated for this audio format */
62 unsigned int num_filters
;
63 /** pointer to the array of filters to be activated */
64 struct filter
**filters
;
65 /** pointer to the array of filter configurations */
67 /** the number of filters that should be activated for this audio format */
68 unsigned int num_writers
;
69 /** pointer to the array of writers to be activated */
70 struct writer
**writers
;
71 /** pointer to the array of writer configurations */
73 /** do not start receiver/filters/writer before this time */
74 struct timeval restart_barrier
;
78 * describes one instance of a receiver-filter-writer chain
80 * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
81 * writer_node, writer_node_group.
84 /** number of the audio format in this slot */
86 /** writer start time */
87 struct timeval wstime
;
88 /** the receiver info associated with this slot */
89 struct receiver_node
*receiver_node
;
90 /** the active filter chain */
91 struct filter_chain
*fc
;
92 /** the active writer node group */
93 struct writer_node_group
*wng
;
95 static struct slot_info slot
[MAX_STREAM_SLOTS
];
97 extern const char *status_item_list
[NUM_STAT_ITEMS
];
99 static struct gengetopt_args_info conf
;
100 static struct timeval server_stream_start
, sa_time_diff
;
101 static int playing
, current_decoder
= -1,
102 audiod_status
= AUDIOD_ON
, offset_seconds
, length_seconds
,
103 sa_time_diff_sign
= 1;
104 static char *af_status
, /* the audio format announced in server status */
105 *socket_name
, *hostname
;
106 static char *stat_item_values
[NUM_STAT_ITEMS
];
107 static FILE *logfile
;
108 static const struct timeval restart_delay
= {0, 200 * 1000};
109 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
110 static struct timeval
*now
;
112 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
115 * the task for handling audiod commands
117 * \sa struct task, struct sched
119 struct command_task
{
120 /** the local listening socket */
122 /** the associated task structure */
127 * the task for audiod's child (para_client stat)
129 * \sa struct task, struct sched
132 /** the output of the stat command is read from this fd */
134 /** stat data is stored here */
135 char buf
[STRINGSIZE
];
136 /** number of bytes loaded in \a buf */
138 /** the associated task structure */
141 static struct status_task status_task_struct
, *stat_task
= &status_task_struct
;
149 /** defines one command of para_audiod */
150 struct audiod_command
{
151 /** the name of the command */
153 /** pointer to the function that handles the command */
154 int (*handler
)(int, int, char**);
156 * if the command prefers to handle the full line (rather than the usual
157 * argv[] array), it stores a pointer to the corresponding line handling
158 * function here. In this case, the above \a handler pointer must be NULL.
160 int (*line_handler
)(int, char*);
161 /** one-line description of the command */
162 const char *description
;
163 /** summary of the command line options */
164 const char *synopsis
;
165 /** the long help text */
168 static int com_grab(int, char *);
169 static int com_cycle(int, int, char **);
170 static int com_help(int, int, char **);
171 static int com_off(int, int, char **);
172 static int com_on(int, int, char **);
173 static int com_sb(int, int, char **);
174 static int com_stat(int, int, char **);
175 static int com_term(int, int, char **);
176 static struct audiod_command cmds
[] = {
179 .handler
= com_cycle
,
180 .description
= "switch to next mode",
184 "on -> standby -> off -> on\n"
189 .line_handler
= com_grab
,
190 .description
= "grab the audio stream",
191 .synopsis
= "-- grab [grab_options]",
194 "grab ('splice') the audio stream at any position in the filter \n"
195 "chain and send that data back to the client. Try\n"
196 "\t para_audioc -- grab -h\n"
197 "for the list of available options.\n"
203 .description
= "display command list or help for given command",
204 .synopsis
= "help [command]",
207 "When I was younger, so much younger than today, I never needed\n"
208 "anybody's help in any way. But now these days are gone, I'm not so\n"
209 "self assured. Now I find I've changed my mind and opened up the doors.\n"
211 " -- Beatles: Help\n"
217 .description
= "deactivate para_audiod",
221 "Close connection to para_server and stop all decoders.\n"
227 .description
= "activate para_audiod",
231 "Establish connection to para_server, retrieve para_server's current\n"
232 "status. If playing, start corresponding decoder. Otherwise stop\n"
239 .description
= "enter standby mode",
243 "Stop all decoders but leave connection to para_server open.\n"
249 .description
= "print status information",
250 .synopsis
= "stat [item1 ...]",
253 "Dump given status items (all if none given) to stdout.\n"
259 .description
= "terminate audiod",
263 "Stop all decoders, shut down connection to para_server and exit.\n"
271 /** iterate over all slots */
272 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
273 /** iterate over all supported audio formats */
274 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
275 /** iterate over the array of all audiod commands */
276 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
279 * get the audio format number
280 * \param name the name of the audio format
282 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
283 * \a name is not a supported audio format.
285 int get_audio_format_num(char *name
)
288 FOR_EACH_AUDIO_FORMAT(i
)
289 if (!strcmp(name
, audio_formats
[i
]))
291 return -E_UNSUPPORTED_AUDIO_FORMAT
;
295 * log function. first argument is loglevel.
297 void para_log(int ll
, const char* fmt
,...)
303 char str
[MAXLINE
] = "";
305 if (ll
< conf
.loglevel_arg
)
307 outfd
= logfile
? logfile
: stderr
;
310 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
311 fprintf(outfd
, "%s %s ", str
, hostname
);
312 if (conf
.loglevel_arg
<= INFO
)
313 fprintf(outfd
, "%i ", ll
);
315 vfprintf(outfd
, fmt
, argp
);
319 static int client_write(int fd
, const char *buf
)
321 size_t len
= strlen(buf
);
322 return write(fd
, buf
, len
) != len
? -E_CLIENT_WRITE
: 1;
325 static char *get_time_string(struct timeval
*newest_stime
)
327 struct timeval diff
, adj_stream_start
, tmp
;
328 int total
= 0, use_server_time
= 1;
333 return make_message("%s:\n", status_item_list
[SI_PLAY_TIME
]);
335 if (audiod_status
== AUDIOD_OFF
)
337 if (sa_time_diff_sign
> 0)
338 tv_diff(&server_stream_start
, &sa_time_diff
,
341 tv_add(&server_stream_start
, &sa_time_diff
,
343 tmp
= adj_stream_start
;
344 if (newest_stime
&& audiod_status
== AUDIOD_ON
) {
345 tv_diff(newest_stime
, &adj_stream_start
, &diff
);
346 if (tv2ms(&diff
) < 5000) {
351 tv_diff(now
, &tmp
, &diff
);
352 total
= diff
.tv_sec
+ offset_seconds
;
353 if (total
> length_seconds
)
354 total
= length_seconds
;
359 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
360 status_item_list
[SI_PLAY_TIME
],
361 use_server_time
? "~" : "",
364 (length_seconds
- total
) / 60,
365 (length_seconds
- total
) % 60,
366 length_seconds
? (total
* 100 + length_seconds
/ 2) /
373 __malloc
static char *audiod_status_string(void)
375 const char *status
= (audiod_status
== AUDIOD_ON
)?
376 "on" : (audiod_status
== AUDIOD_OFF
)? "off": "sb";
377 return make_message("%s:%s\n", status_item_list
[SI_AUDIOD_STATUS
], status
);
380 static struct timeval
*wstime(void)
383 struct timeval
*max
= NULL
;
385 struct slot_info
*s
= &slot
[i
];
388 if (max
&& tv_diff(&s
->wstime
, max
, NULL
) <= 0)
394 __malloc
static char *decoder_flags(void)
397 char decoder_flags
[MAX_STREAM_SLOTS
+ 1];
400 struct slot_info
*s
= &slot
[i
];
402 if (s
->receiver_node
)
406 decoder_flags
[i
] = flag
;
408 decoder_flags
[MAX_STREAM_SLOTS
] = '\0';
409 return make_message("%s:%s\n", status_item_list
[SI_DECODER_FLAGS
],
413 static char *configfile_exists(void)
415 static char *config_file
;
418 char *home
= para_homedir();
419 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
422 return file_exists(config_file
)? config_file
: NULL
;
425 static void setup_signal_handling(void)
427 sig_task
->fd
= para_signal_init();
428 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
429 para_install_sighandler(SIGINT
);
430 para_install_sighandler(SIGTERM
);
431 para_install_sighandler(SIGCHLD
);
432 para_install_sighandler(SIGHUP
);
433 signal(SIGPIPE
, SIG_IGN
);
436 static void audiod_status_dump(void)
438 static char *p_ts
, *p_us
, *p_as
, *p_df
;
439 struct timeval
*t
= wstime();
440 char *us
, *tmp
= get_time_string(t
);
442 if (tmp
&& (!p_ts
|| strcmp(tmp
, p_ts
)))
443 stat_client_write(tmp
, SI_PLAY_TIME
);
448 tmp
= make_message("%s:%s\n", status_item_list
[SI_AUDIOD_UPTIME
], us
);
450 if (!p_us
|| strcmp(p_us
, tmp
))
451 stat_client_write(tmp
, SI_AUDIOD_UPTIME
);
455 tmp
= audiod_status_string();
456 if (!p_as
|| strcmp(p_as
, tmp
))
457 stat_client_write(tmp
, SI_AUDIOD_STATUS
);
461 tmp
= decoder_flags();
462 if (!p_df
|| strcmp(p_df
, tmp
))
463 stat_client_write(tmp
, SI_DECODER_FLAGS
);
468 static void clear_slot(int slot_num
)
470 struct slot_info
*s
= &slot
[slot_num
];
472 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
473 memset(s
, 0, sizeof(struct slot_info
));
477 static void close_receiver(int slot_num
)
479 struct slot_info
*s
= &slot
[slot_num
];
480 struct audio_format_info
*a
;
482 if (s
->format
< 0 || !s
->receiver_node
)
485 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
486 audio_formats
[s
->format
] , slot_num
, s
->receiver_node
->eof
);
487 if (!s
->receiver_node
->eof
)
488 unregister_task(&s
->receiver_node
->task
);
489 a
->receiver
->close(s
->receiver_node
);
490 free(s
->receiver_node
);
491 s
->receiver_node
= NULL
;
492 /* set restart barrier */
493 tv_add(now
, &restart_delay
, &afi
[s
->format
].restart_barrier
);
496 static void kill_all_decoders(void)
501 struct slot_info
*s
= &slot
[i
];
502 if (s
->wng
&& !s
->wng
->eof
) {
503 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
505 wng_unregister(s
->wng
);
508 if (s
->fc
&& !s
->fc
->eof
) {
509 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i
);
510 unregister_task(&s
->fc
->task
);
513 if (s
->receiver_node
&& !s
->receiver_node
->eof
) {
514 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i
);
515 unregister_task(&s
->receiver_node
->task
);
516 s
->receiver_node
->eof
= 1;
521 static int get_empty_slot(void)
532 if (s
->wng
|| s
->receiver_node
|| s
->fc
)
537 return -E_NO_MORE_SLOTS
;
540 static int decoder_running(int format
)
547 if (s
->format
== format
&& s
->receiver_node
)
549 if (s
->format
== format
&& s
->wng
)
555 static void close_stat_pipe(void)
559 if (stat_task
->fd
< 0)
561 PARA_NOTICE_LOG("%s", "closing status pipe\n");
562 close(stat_task
->fd
);
563 del_close_on_fork_list(stat_task
->fd
);
566 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
567 free(stat_item_values
[i
]);
568 stat_item_values
[i
] = NULL
;
573 audiod_status_dump();
575 stat_item_values
[SI_STATUS_BAR
] = make_message(
576 "%s:no connection to para_server\n",
577 status_item_list
[SI_STATUS_BAR
]);
578 stat_client_write(stat_item_values
[SI_STATUS_BAR
], SI_STATUS_BAR
);
581 static void __noreturn
clean_exit(int status
, const char *msg
)
583 PARA_EMERG_LOG("%s\n", msg
);
586 if (stat_task
->fd
>= 0)
592 * get the number of filters
594 * \param audio_format_num the number identifying the audio format
596 * \return the number of filters for the given audio format
600 int num_filters(int audio_format_num
)
602 return afi
[audio_format_num
].num_filters
;
605 static void filter_event_handler(struct task
*t
)
607 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
611 static void open_filters(int slot_num
)
613 struct slot_info
*s
= &slot
[slot_num
];
614 struct audio_format_info
*a
= &afi
[s
->format
];
615 int nf
= a
->num_filters
;
621 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
622 s
->fc
= para_calloc(sizeof(struct filter_chain
));
623 INIT_LIST_HEAD(&s
->fc
->filters
);
624 s
->fc
->inbuf
= s
->receiver_node
->buf
;
625 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
626 s
->fc
->input_eof
= &s
->receiver_node
->eof
;
627 s
->fc
->task
.pre_select
= filter_pre_select
;
628 s
->fc
->task
.event_handler
= filter_event_handler
;
629 s
->fc
->task
.private_data
= s
->fc
;
630 s
->fc
->task
.flags
= 0;
633 s
->receiver_node
->output_eof
= &s
->fc
->eof
;
634 sprintf(s
->fc
->task
.status
, "filter chain");
635 for (i
= 0; i
< nf
; i
++) {
636 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
637 fn
->conf
= a
->filter_conf
[i
];
639 fn
->filter
= a
->filters
[i
];
640 INIT_LIST_HEAD(&fn
->callbacks
);
641 list_add_tail(&fn
->node
, &s
->fc
->filters
);
642 fn
->filter
->open(fn
);
643 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
644 audio_formats
[s
->format
], i
+ 1, nf
,
645 fn
->filter
->name
, slot_num
);
646 s
->fc
->outbuf
= fn
->buf
;
647 s
->fc
->out_loaded
= &fn
->loaded
;
649 register_task(&s
->fc
->task
);
652 static struct filter_node
*find_filter_node(int slot_num
, int format
, int filternum
)
654 struct filter_node
*fn
;
658 struct slot_info
*s
= &slot
[i
];
659 if (s
->format
< 0 || !s
->fc
)
661 if (slot_num
>= 0 && slot_num
!= i
)
663 if (format
>= 0 && s
->format
!= format
)
665 if (num_filters(i
) < filternum
)
669 list_for_each_entry(fn
, &s
->fc
->filters
, node
)
670 if (filternum
<= 0 || j
++ == filternum
)
677 static void wng_event_handler(struct task
*t
)
679 struct writer_node_group
*wng
= t
->private_data
;
684 struct slot_info
*s
= &slot
[i
];
687 PARA_INFO_LOG("slot %d: %s\n", i
, PARA_STRERROR(-t
->ret
));
691 static void open_writers(int slot_num
)
694 struct slot_info
*s
= &slot
[slot_num
];
695 struct audio_format_info
*a
= &afi
[s
->format
];
697 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
699 s
->wng
= setup_default_wng();
701 s
->wng
= wng_new(a
->num_writers
);
703 s
->wng
->buf
= s
->fc
->outbuf
;
704 s
->wng
->loaded
= s
->fc
->out_loaded
;
705 s
->wng
->input_eof
= &s
->fc
->eof
;
706 s
->wng
->channels
= &s
->fc
->channels
;
707 s
->wng
->samplerate
= &s
->fc
->samplerate
;
708 s
->fc
->output_eof
= &s
->wng
->eof
;
709 PARA_INFO_LOG("samplerate: %d\n", *s
->wng
->samplerate
);
711 s
->wng
->buf
= s
->receiver_node
->buf
;
712 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
713 s
->wng
->input_eof
= &s
->receiver_node
->eof
;
715 s
->wng
->task
.event_handler
= wng_event_handler
;
716 for (i
= 0; i
< a
->num_writers
; i
++) {
717 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
718 s
->wng
->writer_nodes
[i
].writer
= a
->writers
[i
];
719 sprintf(s
->wng
->writer_nodes
[i
].task
.status
, "writer_node");
721 ret
= wng_open(s
->wng
);
723 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
727 current_decoder
= slot_num
;
728 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fc
->filters
);
731 static void rn_event_handler(struct task
*t
)
733 // struct receiver_node *rn = t->private_data;
734 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
738 static void open_receiver(int format
)
740 struct audio_format_info
*a
= &afi
[format
];
743 struct receiver_node
*rn
;
745 slot_num
= get_empty_slot();
747 clean_exit(EXIT_FAILURE
, PARA_STRERROR(-slot_num
));
750 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
751 rn
= s
->receiver_node
;
752 rn
->receiver
= a
->receiver
;
753 rn
->conf
= a
->receiver_conf
;
754 ret
= a
->receiver
->open(s
->receiver_node
);
756 PARA_ERROR_LOG("failed to open receiver (%s)\n",
757 PARA_STRERROR(-ret
));
758 free(s
->receiver_node
);
759 s
->receiver_node
= NULL
;
762 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
763 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
764 rn
->task
.private_data
= s
->receiver_node
;
765 rn
->task
.pre_select
= a
->receiver
->pre_select
;
766 rn
->task
.post_select
= a
->receiver
->post_select
;
767 rn
->task
.event_handler
= rn_event_handler
;
769 sprintf(rn
->task
.status
, "receiver node");
770 register_task(&rn
->task
);
773 static int is_frozen(int format
)
775 struct audio_format_info
*a
= &afi
[format
];
777 return (tv_diff(now
, &a
->restart_barrier
, NULL
) > 0)? 0 : 1;
780 static void open_current_receiver(void)
786 i
= get_audio_format_num(af_status
);
789 if (decoder_running(i
) || is_frozen(i
))
794 static void compute_time_diff(const struct timeval
*status_time
)
796 struct timeval tmp
, diff
;
799 const struct timeval max_deviation
= {0, 500 * 1000};
800 const int time_smooth
= 5;
802 sign
= tv_diff(status_time
, now
, &diff
);
803 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
804 // sign, sa_time_diff_sign);
806 sa_time_diff_sign
= sign
;
812 int s
= tv_diff(&diff
, &sa_time_diff
, &tmp
);
813 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
814 PARA_WARNING_LOG("time diff jump: %lims\n",
818 sa_time_diff_sign
= tv_convex_combination(
819 sa_time_diff_sign
* time_smooth
, &sa_time_diff
,
820 count
> 10? sign
: sign
* time_smooth
, &diff
,
823 PARA_DEBUG_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
826 sa_time_diff_sign
? "+" : "-",
831 static void check_stat_line(char *line
)
835 long unsigned sec
, usec
;
838 // PARA_INFO_LOG("line: %s\n", line);
841 itemnum
= stat_line_valid(line
);
843 PARA_WARNING_LOG("invalid status line: %s\n", line
);
846 tmp
= make_message("%s\n", line
);
847 stat_client_write(tmp
, itemnum
);
849 free(stat_item_values
[itemnum
]);
850 stat_item_values
[itemnum
] = para_strdup(line
);
851 ilen
= strlen(status_item_list
[itemnum
]);
854 playing
= strstr(line
, "playing")? 1 : 0;
858 af_status
= para_strdup(line
+ ilen
+ 1);
861 offset_seconds
= atoi(line
+ ilen
+ 1);
864 length_seconds
= atoi(line
+ ilen
+ 1);
866 case SI_STREAM_START
:
867 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
868 server_stream_start
.tv_sec
= sec
;
869 server_stream_start
.tv_usec
= usec
;
872 case SI_CURRENT_TIME
:
873 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
874 struct timeval tv
= {sec
, usec
};
875 compute_time_diff(&tv
);
881 static void handle_signal(int sig
)
886 pid_t pid
= para_reap_child();
889 PARA_CRIT_LOG("para_client died (pid %d)\n", pid
);
894 PARA_EMERG_LOG("terminating on signal %d\n", sig
);
895 clean_exit(EXIT_FAILURE
, "caught deadly signal");
900 static void try_to_close_slot(int slot_num
)
902 struct slot_info
*s
= &slot
[slot_num
];
906 if (s
->receiver_node
&& !s
->receiver_node
->eof
)
908 if (s
->fc
&& !s
->fc
->eof
)
910 if (s
->wng
&& !s
->wng
->eof
)
912 PARA_INFO_LOG("closing slot %d \n", slot_num
);
914 close_filters(s
->fc
);
916 close_receiver(slot_num
);
917 clear_slot(slot_num
);
920 static void audiod_pre_select(struct sched
*s
, __a_unused
struct task
*t
)
926 if (audiod_status
!= AUDIOD_ON
)
929 open_current_receiver();
931 struct slot_info
*s
= &slot
[i
];
932 struct audio_format_info
*a
;
934 try_to_close_slot(i
);
938 if (!s
->receiver_node
)
940 if (!a
->num_filters
) {
941 if (s
->receiver_node
->loaded
&& !s
->wng
)
945 if (s
->receiver_node
->loaded
&& !s
->fc
) {
949 if (s
->fc
&& *s
->fc
->out_loaded
&& !s
->wng
)
954 static void audiod_post_select(struct sched
*s
, __a_unused
struct task
*t
)
956 /* only save away the current time for other users */
961 static void init_audiod_task(struct task
*t
)
963 t
->pre_select
= audiod_pre_select
;
964 t
->post_select
= audiod_post_select
;
965 t
->event_handler
= NULL
;
968 sprintf(t
->status
, "audiod task");
971 static int parse_stream_command(const char *txt
, char **cmd
)
973 char *p
= strchr(txt
, ':');
977 return -E_MISSING_COLON
;
979 FOR_EACH_AUDIO_FORMAT(i
) {
980 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
985 return -E_UNSUPPORTED_AUDIO_FORMAT
;
988 static int add_filter(int format
, char *cmdline
)
990 struct audio_format_info
*a
= &afi
[format
];
991 int filter_num
, nf
= a
->num_filters
;
993 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
996 a
->filters
[nf
] = &filters
[filter_num
];
998 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
999 a
->filters
[nf
]->name
);
1003 static int init_writers(void)
1007 struct audio_format_info
*a
;
1009 init_supported_writers();
1010 nw
= PARA_MAX(1, conf
.writer_given
);
1011 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
1012 FOR_EACH_AUDIO_FORMAT(i
) {
1014 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
1015 a
->writers
= para_malloc(nw
* sizeof(struct writer
*));
1018 for (i
= 0; i
< conf
.writer_given
; i
++) {
1021 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
1025 nw
= a
->num_writers
;
1026 wconf
= check_writer_arg(cmd
, &writer_num
);
1031 a
->writers
[nw
] = &writers
[writer_num
];
1032 a
->writer_conf
[nw
] = wconf
;
1033 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
1034 nw
, writer_names
[writer_num
]);
1042 static int init_receivers(void)
1044 int i
, ret
, receiver_num
;
1046 struct audio_format_info
*a
;
1048 for (i
= 0; receivers
[i
].name
; i
++) {
1049 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
1050 receivers
[i
].init(&receivers
[i
]);
1052 for (i
= 0; i
< conf
.receiver_given
; i
++) {
1053 char *arg
= conf
.receiver_arg
[i
];
1054 char *recv
= strchr(arg
, ':');
1055 ret
= -E_MISSING_COLON
;
1060 ret
= get_audio_format_num(arg
);
1063 afi
[ret
].receiver_conf
= check_receiver_arg(recv
, &receiver_num
);
1064 if (!afi
[ret
].receiver_conf
) {
1065 ret
= -E_RECV_SYNTAX
;
1068 afi
[ret
].receiver
= &receivers
[receiver_num
];
1070 /* use the first available receiver with no arguments
1071 * for those audio formats for which no receiver
1074 cmd
= para_strdup(receivers
[0].name
);
1075 FOR_EACH_AUDIO_FORMAT(i
) {
1077 if (a
->receiver_conf
)
1079 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
1080 if (!a
->receiver_conf
)
1081 return -E_RECV_SYNTAX
;
1082 a
->receiver
= &receivers
[receiver_num
];
1090 static int init_default_filters(void)
1094 FOR_EACH_AUDIO_FORMAT(i
) {
1095 struct audio_format_info
*a
= &afi
[i
];
1100 continue; /* no default -- nothing to to */
1101 /* add "dec" to audio format name */
1102 tmp
= make_message("%sdec", audio_formats
[i
]);
1103 for (j
= 0; filters
[j
].name
; j
++)
1104 if (!strcmp(tmp
, filters
[j
].name
))
1107 ret
= -E_UNSUPPORTED_FILTER
;
1108 if (!filters
[j
].name
)
1110 tmp
= para_strdup(filters
[j
].name
);
1111 ret
= add_filter(i
, tmp
);
1115 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
1122 static int init_filters(void)
1126 filter_init(filters
);
1127 nf
= PARA_MAX(1, conf
.filter_given
);
1128 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
1129 FOR_EACH_AUDIO_FORMAT(i
) {
1130 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
1131 afi
[i
].filters
= para_malloc(nf
* sizeof(struct filter
*));
1133 if (!conf
.no_default_filters_given
)
1134 return init_default_filters();
1135 for (i
= 0; i
< conf
.filter_given
; i
++) {
1136 char *arg
= conf
.filter_arg
[i
];
1137 char *filter_name
= strchr(arg
, ':');
1138 ret
= -E_MISSING_COLON
;
1141 *filter_name
= '\0';
1143 ret
= get_audio_format_num(arg
);
1146 ret
= add_filter(ret
, filter_name
);
1150 ret
= init_default_filters(); /* use default values for the rest */
1155 static int init_stream_io(void)
1159 ret
= init_writers();
1162 ret
= init_receivers();
1165 ret
= init_filters();
1171 static int dump_commands(int fd
)
1173 char *buf
= para_strdup(""), *tmp
= NULL
;
1177 FOR_EACH_COMMAND(i
) {
1178 tmp
= make_message("%s%s\t%s\n", buf
, cmds
[i
].name
,
1179 cmds
[i
].description
);
1183 ret
= client_write(fd
, buf
);
1189 * command handlers don't close their fd on errors (ret < 0) so that
1190 * its caller can send an error message. Otherwise (ret >= 0) it's up
1191 * to each individual command to close the fd if necessary.
1194 static int com_help(int fd
, int argc
, char **argv
)
1198 const char *dflt
= "No such command. Available commands:\n";
1201 ret
= dump_commands(fd
);
1204 FOR_EACH_COMMAND(i
) {
1205 if (strcmp(cmds
[i
].name
, argv
[1]))
1208 "NAME\n\t%s -- %s\n"
1209 "SYNOPSIS\n\tpara_audioc %s\n"
1210 "DESCRIPTION\n%s\n",
1212 cmds
[i
].description
,
1216 ret
= client_write(fd
, buf
);
1220 ret
= client_write(fd
, dflt
);
1222 ret
= dump_commands(fd
);
1229 static int com_stat(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1233 long unsigned mask
= ~0LU;
1237 for (i
= 1; i
< argc
; i
++) {
1238 ret
= stat_item_valid(argv
[i
]);
1244 PARA_INFO_LOG("mask: 0x%lx\n", mask
);
1245 if (mask
& (1 << SI_PLAY_TIME
)) {
1246 struct timeval
*t
= wstime();
1247 char *ts
= get_time_string(t
);
1249 ret
= client_write(fd
, ts
);
1255 if (mask
& (1 << SI_AUDIOD_UPTIME
)) {
1256 char *tmp
, *us
= uptime_str();
1257 tmp
= make_message("%s:%s\n",
1258 status_item_list
[SI_AUDIOD_UPTIME
], us
);
1260 ret
= client_write(fd
, tmp
);
1265 if (mask
& (1 << SI_AUDIOD_STATUS
)) {
1266 char *s
= audiod_status_string();
1267 ret
= client_write(fd
, s
);
1272 if (mask
& (1 << SI_DECODER_FLAGS
)) {
1273 char *df
=decoder_flags();
1274 ret
= client_write(fd
, df
);
1280 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
1282 if (!((1 << i
) & mask
))
1284 v
= stat_item_values
[i
];
1285 tmp
= make_message("%s%s%s", buf
? buf
: "",
1286 v
? v
: "", v
? "\n" : "");
1290 ret
= client_write(fd
, buf
);
1293 ret
= stat_client_add(fd
, mask
);
1298 static int com_grab(int fd
, char *cmdline
)
1300 struct grab_client
*gc
;
1301 struct filter_node
*fn
;
1305 gc
= grab_client_new(fd
, cmdline
, &err
);
1308 fn
= find_filter_node(gc
->conf
->slot_arg
, gc
->audio_format_num
, gc
->conf
->filter_num_arg
);
1310 activate_grab_client(gc
, fn
);
1313 if (err
!= -E_GC_HELP_GIVEN
&& err
!= -E_GC_VERSION_GIVEN
)
1315 if (err
== -E_GC_HELP_GIVEN
) {
1316 msg
= make_message("%s\n\n", grab_client_args_info_usage
);
1317 for (i
= 0; grab_client_args_info_help
[i
]; i
++) {
1318 char *tmp
= make_message("%s%s\n", msg
,
1319 grab_client_args_info_help
[i
]);
1324 msg
= make_message("%s %s\n",
1325 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE
,
1326 GRAB_CLIENT_CMDLINE_PARSER_VERSION
);
1327 err
= client_write(fd
, msg
);
1335 static int __noreturn
com_term(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1338 clean_exit(EXIT_SUCCESS
, "terminating on user request");
1341 static int com_on(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1343 audiod_status
= AUDIOD_ON
;
1348 static int com_off(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1350 audiod_status
= AUDIOD_OFF
;
1355 static int com_sb(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1357 audiod_status
= AUDIOD_STANDBY
;
1362 static int com_cycle(int fd
, int argc
, char **argv
)
1364 switch (audiod_status
) {
1366 return com_sb(fd
, argc
, argv
);
1369 return com_on(fd
, argc
, argv
);
1371 case AUDIOD_STANDBY
:
1372 return com_off(fd
, argc
, argv
);
1379 static int check_perms(uid_t uid
)
1383 if (!conf
.user_allow_given
)
1385 for (i
= 0; i
< conf
.user_allow_given
; i
++)
1386 if (uid
== conf
.user_allow_arg
[i
])
1388 return -E_UCRED_PERM
;
1391 static int handle_connect(int accept_fd
)
1393 int i
, argc
, ret
, clifd
= -1;
1394 char *cmd
= NULL
, *p
, *buf
= para_calloc(MAXLINE
), **argv
= NULL
;
1395 struct sockaddr_un unix_addr
;
1397 ret
= para_accept(accept_fd
, &unix_addr
, sizeof(struct sockaddr_un
));
1401 ret
= recv_cred_buffer(clifd
, buf
, MAXLINE
- 1);
1404 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret
, buf
);
1405 ret
= check_perms(ret
);
1408 ret
= -E_INVALID_AUDIOD_CMD
;
1409 cmd
= para_strdup(buf
);
1410 p
= strchr(cmd
, '\n');
1417 for (i
= 0; cmds
[i
].name
; i
++) {
1419 if (strcmp(cmds
[i
].name
, cmd
))
1421 if (cmds
[i
].handler
) {
1422 argc
= split_args(buf
, &argv
, "\n");
1423 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv
[0], argc
);
1424 ret
= cmds
[i
].handler(clifd
, argc
, argv
);
1427 for (j
= 0; p
[j
]; j
++)
1430 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd
, p
);
1431 ret
= cmds
[i
].line_handler(clifd
, p
);
1434 ret
= -E_INVALID_AUDIOD_CMD
; /* cmd not found */
1439 if (clifd
> 0 && ret
< 0 && ret
!= -E_CLIENT_WRITE
) {
1440 char *tmp
= make_message("%s\n", PARA_STRERROR(-ret
));
1441 client_write(clifd
, tmp
);
1448 static int audiod_get_socket(void)
1450 struct sockaddr_un unix_addr
;
1453 if (conf
.socket_given
)
1454 socket_name
= para_strdup(conf
.socket_arg
);
1456 char *hn
= para_hostname();
1457 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
1461 PARA_NOTICE_LOG("local socket: %s\n", socket_name
);
1462 if (conf
.force_given
)
1463 unlink(socket_name
);
1464 fd
= create_pf_socket(socket_name
, &unix_addr
,
1465 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
1467 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1468 exit(EXIT_FAILURE
); /* do not unlink socket */
1470 if (listen(fd
, 5) < 0) {
1471 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1472 exit(EXIT_FAILURE
); /* do not unlink socket */
1474 add_close_on_fork_list(fd
);
1478 static int open_stat_pipe(void)
1480 int ret
, fd
[3] = {-1, 1, 0};
1482 ret
= para_exec_cmdline_pid(&pid
, BINDIR
"/para_client stat", fd
);
1485 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret
);
1486 add_close_on_fork_list(ret
);
1488 clean_exit(EXIT_FAILURE
, "failed to open status pipe");
1492 void signal_event_handler(struct task
*t
)
1494 struct signal_task
*st
= t
->private_data
;
1495 handle_signal(st
->signum
);
1498 void signal_pre_select(struct sched
*s
, struct task
*t
)
1500 struct signal_task
*st
= t
->private_data
;
1502 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
1505 void signal_post_select(struct sched
*s
, struct task
*t
)
1507 struct signal_task
*st
= t
->private_data
;
1509 if (!FD_ISSET(st
->fd
, &s
->rfds
))
1511 t
->ret
= -E_SIGNAL_CAUGHT
;
1512 st
->signum
= para_next_signal();
1515 void signal_setup_default(struct signal_task
*st
)
1517 st
->task
.pre_select
= signal_pre_select
;
1518 st
->task
.post_select
= signal_post_select
;
1519 st
->task
.private_data
= st
;
1521 sprintf(st
->task
.status
, "signal task");
1524 static void command_pre_select(struct sched
*s
, struct task
*t
)
1526 struct command_task
*ct
= t
->private_data
;
1528 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1532 static void command_post_select(struct sched
*s
, struct task
*t
)
1535 struct command_task
*ct
= t
->private_data
;
1537 t
->ret
= 1; /* always successful */
1538 if (audiod_status
!= AUDIOD_OFF
)
1539 audiod_status_dump();
1540 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
1542 ret
= handle_connect(ct
->fd
);
1544 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
1547 static void init_command_task(struct command_task
*ct
)
1549 ct
->task
.pre_select
= command_pre_select
;
1550 ct
->task
.post_select
= command_post_select
;
1551 ct
->task
.event_handler
= NULL
;
1552 ct
->task
.private_data
= ct
;
1554 ct
->fd
= audiod_get_socket(); /* doesn't return on errors */
1555 sprintf(ct
->task
.status
, "command task");
1558 static void status_pre_select(struct sched
*s
, struct task
*t
)
1560 struct status_task
*st
= t
->private_data
;
1562 if (st
->fd
>= 0 && audiod_status
== AUDIOD_OFF
)
1564 if (st
->fd
< 0 && audiod_status
!= AUDIOD_OFF
) {
1565 st
->fd
= open_stat_pipe();
1569 if (st
->fd
>= 0 && audiod_status
!= AUDIOD_OFF
)
1570 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
1573 static void status_post_select(struct sched
*s
, struct task
*t
)
1575 struct status_task
*st
= t
->private_data
;
1579 if (st
->fd
< 0 || !FD_ISSET(st
->fd
, &s
->rfds
))
1581 ret
= read(st
->fd
, st
->buf
+ st
->loaded
,
1582 STRINGSIZE
- 1 - st
->loaded
);
1585 /* avoid busy loop if server is down */
1586 while (sleep(1) > 0) /* FIXME */
1589 st
->buf
[ret
+ st
->loaded
] = '\0';
1590 st
->loaded
= for_each_line(st
->buf
, ret
+ st
->loaded
,
1595 static void init_status_task(struct status_task
*st
)
1597 st
->task
.pre_select
= status_pre_select
;
1598 st
->task
.post_select
= status_post_select
;
1599 st
->task
.private_data
= st
;
1604 sprintf(st
->task
.status
, "status task");
1607 static void set_initial_status(void)
1609 audiod_status
= AUDIOD_ON
;
1610 if (!conf
.mode_given
)
1612 if (!strcmp(conf
.mode_arg
, "sb")) {
1613 audiod_status
= AUDIOD_STANDBY
;
1616 if (!strcmp(conf
.mode_arg
, "off")) {
1617 audiod_status
= AUDIOD_OFF
;
1620 if (strcmp(conf
.mode_arg
, "on"))
1621 PARA_WARNING_LOG("%s", "invalid mode\n");
1624 int main(int argc
, char *argv
[])
1629 struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
1630 struct task audiod_task_struct
, *audiod_task
= &audiod_task_struct
;
1635 hostname
= para_hostname();
1636 cmdline_parser(argc
, argv
, &conf
);
1637 para_drop_privileges(conf
.user_arg
, conf
.group_arg
);
1638 cf
= configfile_exists();
1640 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0)) {
1641 PARA_EMERG_LOG("%s", "parse error in config file\n");
1645 if (conf
.logfile_given
)
1646 logfile
= open_log(conf
.logfile_arg
);
1647 log_welcome("para_audiod", conf
.loglevel_arg
);
1648 i
= init_stream_io();
1650 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i
));
1653 server_uptime(UPTIME_SET
);
1654 set_initial_status();
1658 setup_signal_handling();
1659 signal_setup_default(sig_task
);
1660 sig_task
->task
.event_handler
= signal_event_handler
;
1662 init_status_task(stat_task
);
1663 init_command_task(cmd_task
);
1664 init_audiod_task(audiod_task
);
1666 if (conf
.daemon_given
)
1669 register_task(&sig_task
->task
);
1670 register_task(&cmd_task
->task
);
1671 register_task(&stat_task
->task
);
1672 register_task(audiod_task
);
1673 s
.default_timeout
.tv_sec
= 0;
1674 s
.default_timeout
.tv_usec
= 99 * 1000;
1677 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
1678 return EXIT_FAILURE
;