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 */
21 #include <sys/time.h> /* gettimeofday */
24 #include "audiod.cmdline.h"
26 #include "close_on_fork.h"
30 #include "grab_client.cmdline.h"
31 #include "grab_client.h"
40 #include "write_common.h"
42 /** define the array of error lists needed by para_audiod */
44 /** define the array containing all supported audio formats */
45 DEFINE_AUDIO_FORMAT_ARRAY
;
48 * the possible modes of operation
50 * - off: disconnect from para_server
51 * - on: receive status information from para_server and play the audio stream
52 * - sb: only receive status information but not the audio stream
54 enum {AUDIOD_OFF
, AUDIOD_ON
, AUDIOD_STANDBY
};
56 /** defines how to handle one supported audio format */
57 struct audio_format_info
{
58 /** pointer to the receiver for this audio format */
59 struct receiver
*receiver
;
60 /** the receiver configuration */
62 /** the number of filters that should be activated for this audio format */
63 unsigned int num_filters
;
64 /** pointer to the array of filters to be activated */
65 struct filter
**filters
;
66 /** pointer to the array of filter configurations */
68 /** the number of filters that should be activated for this audio format */
69 unsigned int num_writers
;
70 /** pointer to the array of writers to be activated */
71 struct writer
**writers
;
72 /** pointer to the array of writer configurations */
74 /** do not start receiver/filters/writer before this time */
75 struct timeval restart_barrier
;
79 * describes one instance of a receiver-filter-writer chain
81 * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
82 * writer_node, writer_node_group.
85 /** number of the audio format in this slot */
87 /** time of the last successful read from the receiver */
89 /** time the last write to the write fd happend */
91 /** writer start time */
92 struct timeval wstime
;
93 /** the receiver info associated with this slot */
94 struct receiver_node
*receiver_node
;
95 /** the active filter chain */
96 struct filter_chain
*fc
;
97 /** the active writer node group */
98 struct writer_node_group
*wng
;
100 static struct slot_info slot
[MAX_STREAM_SLOTS
];
102 extern const char *status_item_list
[NUM_STAT_ITEMS
];
104 static struct gengetopt_args_info conf
;
105 static struct timeval server_stream_start
, sa_time_diff
;
106 static int playing
, current_decoder
= -1,
107 audiod_status
= AUDIOD_ON
, offset_seconds
, length_seconds
,
108 sa_time_diff_sign
= 1;
109 static char *af_status
, /* the audio format announced in server status */
110 *socket_name
, *hostname
;
111 static char *stat_item_values
[NUM_STAT_ITEMS
];
112 static FILE *logfile
;
113 static const struct timeval restart_delay
= {0, 300 * 1000};
115 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
117 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
119 struct command_task
{
123 static struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
128 char buf
[STRINGSIZE
];
131 static struct status_task status_task_struct
, *stat_task
= &status_task_struct
;
136 static struct audiod_task audiod_task_struct
, *at
= &audiod_task_struct
;
145 /** defines one command of para_audiod */
146 struct audiod_command
{
147 /** the name of the command */
149 /** pointer to the function that handles the command */
150 int (*handler
)(int, int, char**);
151 int (*line_handler
)(int, char*);
152 /** one-line description of the command */
153 const char *description
;
154 /** summary of the command line options */
155 const char *synopsis
;
156 /** the long help text */
159 static int com_grab(int, char *);
160 static int com_cycle(int, int, char **);
161 static int com_help(int, int, char **);
162 static int com_off(int, int, char **);
163 static int com_on(int, int, char **);
164 static int com_sb(int, int, char **);
165 static int com_stat(int, int, char **);
166 static int com_term(int, int, char **);
167 static struct audiod_command cmds
[] = {
170 .handler
= com_cycle
,
171 .description
= "switch to next mode",
175 "on -> standby -> off -> on\n"
180 .line_handler
= com_grab
,
181 .description
= "grab the audio stream",
182 .synopsis
= "-- grab [grab_options]",
185 "grab ('splice') the audio stream at any position in the filter \n"
186 "chain and send that data back to the client. Try\n"
187 "\t para_audioc -- grab -h\n"
188 "for the list of available options.\n"
194 .description
= "display command list or help for given command",
195 .synopsis
= "help [command]",
198 "When I was younger, so much younger than today, I never needed\n"
199 "anybody's help in any way. But now these days are gone, I'm not so\n"
200 "self assured. Now I find I've changed my mind and opened up the doors.\n"
202 " -- Beatles: Help\n"
208 .description
= "deactivate para_audiod",
212 "Close connection to para_server and stop all decoders.\n"
218 .description
= "activate para_audiod",
222 "Establish connection to para_server, retrieve para_server's current\n"
223 "status. If playing, start corresponding decoder. Otherwise stop\n"
230 .description
= "enter standby mode",
234 "Stop all decoders but leave connection to para_server open.\n"
240 .description
= "print status information",
241 .synopsis
= "stat [item1 ...]",
244 "Dump given status items (all if none given) to stdout.\n"
250 .description
= "terminate audiod",
254 "Stop all decoders, shut down connection to para_server and exit.\n"
262 /** iterate over all slots */
263 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
264 /** iterate over all supported audio formats */
265 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
266 /** iterate over the array of all audiod commands */
267 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
270 * get the audio format number
271 * \param name the name of the audio format
273 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
274 * \a name is not a supported audio format.
276 int get_audio_format_num(char *name
)
279 FOR_EACH_AUDIO_FORMAT(i
)
280 if (!strcmp(name
, audio_formats
[i
]))
282 return -E_UNSUPPORTED_AUDIO_FORMAT
;
286 * log function. first argument is loglevel.
288 void para_log(int ll
, const char* fmt
,...)
294 char str
[MAXLINE
] = "";
296 if (ll
< conf
.loglevel_arg
)
298 outfd
= logfile
? logfile
: stderr
;
301 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
302 fprintf(outfd
, "%s %s ", str
, hostname
);
303 if (conf
.loglevel_arg
<= INFO
)
304 fprintf(outfd
, "%i ", ll
);
306 vfprintf(outfd
, fmt
, argp
);
310 static int client_write(int fd
, const char *buf
)
312 size_t len
= strlen(buf
);
313 return write(fd
, buf
, len
) != len
? -E_CLIENT_WRITE
: 1;
316 static char *get_time_string(struct timeval
*newest_stime
)
318 struct timeval now
, diff
, adj_stream_start
, tmp
;
319 int total
= 0, use_server_time
= 1;
324 return make_message("%s:\n", status_item_list
[SI_PLAY_TIME
]);
326 if (audiod_status
== AUDIOD_OFF
)
328 if (sa_time_diff_sign
> 0)
329 tv_diff(&server_stream_start
, &sa_time_diff
,
332 tv_add(&server_stream_start
, &sa_time_diff
,
334 tmp
= adj_stream_start
;
335 if (newest_stime
&& audiod_status
== AUDIOD_ON
) {
336 tv_diff(newest_stime
, &adj_stream_start
, &diff
);
337 if (tv2ms(&diff
) < 5000) {
342 gettimeofday(&now
, NULL
);
343 tv_diff(&now
, &tmp
, &diff
);
344 total
= diff
.tv_sec
+ offset_seconds
;
345 if (total
> length_seconds
)
346 total
= length_seconds
;
351 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
352 status_item_list
[SI_PLAY_TIME
],
353 use_server_time
? "~" : "",
356 (length_seconds
- total
) / 60,
357 (length_seconds
- total
) % 60,
358 length_seconds
? (total
* 100 + length_seconds
/ 2) /
365 __malloc
static char *audiod_status_string(void)
367 const char *status
= (audiod_status
== AUDIOD_ON
)?
368 "on" : (audiod_status
== AUDIOD_OFF
)? "off": "sb";
369 return make_message("%s:%s\n", status_item_list
[SI_AUDIOD_STATUS
], status
);
372 static struct timeval
*wstime(void)
375 struct timeval
*max
= NULL
;
377 struct slot_info
*s
= &slot
[i
];
380 if (max
&& tv_diff(&s
->wstime
, max
, NULL
) <= 0)
386 __malloc
static char *decoder_flags(void)
389 char decoder_flags
[MAX_STREAM_SLOTS
+ 1];
392 struct slot_info
*s
= &slot
[i
];
394 if (s
->receiver_node
)
398 decoder_flags
[i
] = flag
;
400 decoder_flags
[MAX_STREAM_SLOTS
] = '\0';
401 return make_message("%s:%s\n", status_item_list
[SI_DECODER_FLAGS
],
405 static char *configfile_exists(void)
407 static char *config_file
;
410 char *home
= para_homedir();
411 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
414 return file_exists(config_file
)? config_file
: NULL
;
417 static void setup_signal_handling(void)
419 sig_task
->fd
= para_signal_init();
420 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
421 para_install_sighandler(SIGINT
);
422 para_install_sighandler(SIGTERM
);
423 para_install_sighandler(SIGCHLD
);
424 para_install_sighandler(SIGHUP
);
425 signal(SIGPIPE
, SIG_IGN
);
428 static void audiod_status_dump(void)
430 static char *p_ts
, *p_us
, *p_as
, *p_df
;
431 struct timeval
*t
= wstime();
432 char *us
, *tmp
= get_time_string(t
);
434 if (tmp
&& (!p_ts
|| strcmp(tmp
, p_ts
)))
435 stat_client_write(tmp
, SI_PLAY_TIME
);
440 tmp
= make_message("%s:%s\n", status_item_list
[SI_AUDIOD_UPTIME
], us
);
442 if (!p_us
|| strcmp(p_us
, tmp
))
443 stat_client_write(tmp
, SI_AUDIOD_UPTIME
);
447 tmp
= audiod_status_string();
448 if (!p_as
|| strcmp(p_as
, tmp
))
449 stat_client_write(tmp
, SI_AUDIOD_STATUS
);
453 tmp
= decoder_flags();
454 if (!p_df
|| strcmp(p_df
, tmp
))
455 stat_client_write(tmp
, SI_DECODER_FLAGS
);
460 static void clear_slot(int slot_num
)
462 struct slot_info
*s
= &slot
[slot_num
];
464 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
465 memset(s
, 0, sizeof(struct slot_info
));
469 static void set_restart_barrier(int format
, struct timeval
*now
)
476 gettimeofday(&tmp
, NULL
);
477 tv_add(&tmp
, &restart_delay
, &afi
[format
].restart_barrier
);
480 static void close_receiver(int slot_num
)
482 struct slot_info
*s
= &slot
[slot_num
];
483 struct audio_format_info
*a
;
485 if (s
->format
< 0 || !s
->receiver_node
)
488 PARA_NOTICE_LOG("closing %s recevier in slot %d (eof = %d)\n",
489 audio_formats
[s
->format
] , slot_num
, s
->receiver_node
->eof
);
490 if (!s
->receiver_node
->eof
)
491 unregister_task(&s
->receiver_node
->task
);
492 a
->receiver
->close(s
->receiver_node
);
493 free(s
->receiver_node
);
494 s
->receiver_node
= NULL
;
495 set_restart_barrier(s
->format
, NULL
);
498 static void kill_all_decoders(void)
503 struct slot_info
*s
= &slot
[i
];
504 if (s
->receiver_node
)
505 s
->receiver_node
->eof
= 1;
509 static void check_sigchld(void)
513 gettimeofday(&now
, NULL
);
516 pid
= para_reap_child();
519 PARA_CRIT_LOG("para_client died (pid %d)\n", pid
);
520 goto reap_next_child
;
523 static int get_empty_slot(void)
536 if (s
->receiver_node
)
543 return -E_NO_MORE_SLOTS
;
546 static int decoder_running(int format
)
553 if (s
->format
== format
&& s
->receiver_node
)
555 if (s
->format
== format
&& s
->wng
)
561 static void close_stat_pipe(void)
565 if (stat_task
->fd
< 0)
567 PARA_NOTICE_LOG("%s", "closing status pipe\n");
568 close(stat_task
->fd
);
569 del_close_on_fork_list(stat_task
->fd
);
572 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
573 free(stat_item_values
[i
]);
574 stat_item_values
[i
] = NULL
;
579 audiod_status_dump();
581 stat_item_values
[SI_STATUS_BAR
] = make_message("%s:no connection to para_server\n",
582 status_item_list
[SI_STATUS_BAR
]);
583 stat_client_write(stat_item_values
[SI_STATUS_BAR
], SI_STATUS_BAR
);
586 static void __noreturn
clean_exit(int status
, const char *msg
)
588 PARA_EMERG_LOG("%s\n", msg
);
592 if (stat_task
->fd
>= 0)
597 /** get the number of filters for the given audio format */
598 int num_filters(int audio_format_num
)
600 return afi
[audio_format_num
].num_filters
;
603 void filter_event_handler(struct task
*t
)
605 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
609 static void open_filters(int slot_num
)
611 struct slot_info
*s
= &slot
[slot_num
];
612 struct audio_format_info
*a
= &afi
[s
->format
];
613 int nf
= a
->num_filters
;
619 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
620 s
->fc
= para_calloc(sizeof(struct filter_chain
));
621 INIT_LIST_HEAD(&s
->fc
->filters
);
622 s
->fc
->inbuf
= s
->receiver_node
->buf
;
623 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
624 s
->fc
->input_eof
= &s
->receiver_node
->eof
;
626 s
->fc
->task
.pre_select
= filter_pre_select
;
627 s
->fc
->task
.event_handler
= filter_event_handler
;
628 s
->fc
->task
.private_data
= s
->fc
;
629 s
->fc
->task
.flags
= 0;
631 sprintf(s
->fc
->task
.status
, "filter chain");
632 for (i
= 0; i
< nf
; i
++) {
633 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
634 fn
->conf
= a
->filter_conf
[i
];
636 fn
->filter
= a
->filters
[i
];
637 INIT_LIST_HEAD(&fn
->callbacks
);
638 list_add_tail(&fn
->node
, &s
->fc
->filters
);
639 fn
->filter
->open(fn
);
640 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
641 audio_formats
[s
->format
], i
+ 1, nf
,
642 fn
->filter
->name
, slot_num
);
643 s
->fc
->outbuf
= fn
->buf
;
644 s
->fc
->out_loaded
= &fn
->loaded
;
646 register_task(&s
->fc
->task
);
647 // PARA_DEBUG_LOG("output loaded for filter chain %p: %p\n", s->fc,
648 // s->fc->out_loaded);
651 static struct filter_node
*find_filter_node(int slot_num
, int format
, int filternum
)
653 struct filter_node
*fn
;
657 struct slot_info
*s
= &slot
[i
];
658 if (s
->format
< 0 || !s
->fc
)
660 if (slot_num
>= 0 && slot_num
!= i
)
662 if (format
>= 0 && s
->format
!= format
)
664 if (num_filters(i
) < filternum
)
668 list_for_each_entry(fn
, &s
->fc
->filters
, node
)
669 if (filternum
<= 0 || j
++ == filternum
)
676 static void wng_event_handler(struct task
*t
)
678 struct writer_node_group
*g
= t
->private_data
;
681 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t
->ret
));
684 if (slot
[i
].wng
!= g
)
692 static void open_writer(int slot_num
, struct timeval
*now
)
695 struct slot_info
*s
= &slot
[slot_num
];
696 struct audio_format_info
*a
= &afi
[s
->format
];
698 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
700 s
->wng
= setup_default_wng();
702 s
->wng
= wng_new(a
->num_writers
);
704 s
->wng
->buf
= s
->fc
->outbuf
;
705 s
->wng
->loaded
= s
->fc
->out_loaded
;
706 s
->wng
->input_eof
= &s
->fc
->eof
;
707 s
->fc
->output_eof
= &s
->wng
->eof
;
709 s
->wng
->buf
= s
->receiver_node
->buf
;
710 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
711 s
->wng
->input_eof
= &s
->receiver_node
->eof
;
713 s
->wng
->task
.event_handler
= wng_event_handler
;
714 for (i
= 0; i
< a
->num_writers
; i
++) {
715 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
716 s
->wng
->writer_nodes
[i
].writer
= a
->writers
[i
];
717 sprintf(s
->wng
->writer_nodes
[i
].task
.status
, "writer_ node");
719 ret
= wng_open(s
->wng
);
721 current_decoder
= slot_num
;
722 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fc
->filters
);
725 void rn_event_handler(struct task
*t
)
727 // struct receiver_node *rn = t->private_data;
728 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
731 static void open_receiver(int format
)
733 struct audio_format_info
*a
= &afi
[format
];
736 struct receiver_node
*rn
;
738 slot_num
= get_empty_slot();
740 clean_exit(EXIT_FAILURE
, PARA_STRERROR(-slot_num
));
743 gettimeofday(&s
->rtime
, NULL
);
745 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
746 rn
= s
->receiver_node
;
747 rn
->receiver
= a
->receiver
;
748 rn
->conf
= a
->receiver_conf
;
749 ret
= a
->receiver
->open(s
->receiver_node
);
751 PARA_ERROR_LOG("failed to open receiver (%s)\n",
752 PARA_STRERROR(-ret
));
753 free(s
->receiver_node
);
754 s
->receiver_node
= NULL
;
757 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
758 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
759 rn
->task
.private_data
= s
->receiver_node
;
760 PARA_NOTICE_LOG("rn = %p\n", rn
->task
.private_data
);
761 rn
->task
.pre_select
= a
->receiver
->pre_select
;
762 rn
->task
.post_select
= a
->receiver
->post_select
;
763 rn
->task
.event_handler
= rn_event_handler
;
765 sprintf(rn
->task
.status
, "receiver node");
766 register_task(&rn
->task
);
769 static int is_frozen(int format
, struct timeval
*now
)
771 struct audio_format_info
*a
= &afi
[format
];
773 return (tv_diff(now
, &a
->restart_barrier
, NULL
) > 0)? 0 : 1;
776 static void open_current_receiver(struct timeval
*now
)
782 i
= get_audio_format_num(af_status
);
785 if ((decoder_running(i
) & 1) || is_frozen(i
, now
))
790 static void compute_time_diff(const struct timeval
*status_time
)
792 struct timeval now
, tmp
, diff
;
795 const struct timeval max_deviation
= {0, 500 * 1000};
796 const int time_smooth
= 5;
798 gettimeofday(&now
, NULL
);
799 sign
= tv_diff(status_time
, &now
, &diff
);
800 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
801 // sign, sa_time_diff_sign);
803 sa_time_diff_sign
= sign
;
809 int s
= tv_diff(&diff
, &sa_time_diff
, &tmp
);
810 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
811 PARA_WARNING_LOG("time diff jump: %lims\n",
815 sa_time_diff_sign
= tv_convex_combination(
816 sa_time_diff_sign
* time_smooth
, &sa_time_diff
,
817 count
> 10? sign
: sign
* time_smooth
, &diff
,
820 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
823 sa_time_diff_sign
? "+" : "-",
828 static void check_stat_line(char *line
)
832 long unsigned sec
, usec
;
835 // PARA_INFO_LOG("line: %s\n", line);
838 itemnum
= stat_line_valid(line
);
840 PARA_WARNING_LOG("invalid status line: %s\n", line
);
843 tmp
= make_message("%s\n", line
);
844 stat_client_write(tmp
, itemnum
);
846 free(stat_item_values
[itemnum
]);
847 stat_item_values
[itemnum
] = para_strdup(line
);
848 ilen
= strlen(status_item_list
[itemnum
]);
851 playing
= strstr(line
, "playing")? 1 : 0;
855 af_status
= para_strdup(line
+ ilen
+ 1);
858 offset_seconds
= atoi(line
+ ilen
+ 1);
861 length_seconds
= atoi(line
+ ilen
+ 1);
863 case SI_STREAM_START
:
864 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
865 server_stream_start
.tv_sec
= sec
;
866 server_stream_start
.tv_usec
= usec
;
869 case SI_CURRENT_TIME
:
870 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
871 struct timeval tv
= {sec
, usec
};
872 compute_time_diff(&tv
);
878 static void handle_signal(int sig
)
882 return check_sigchld();
886 PARA_EMERG_LOG("terminating on signal %d\n", sig
);
887 clean_exit(EXIT_FAILURE
, "caught deadly signal");
892 static void check_timeouts(void)
895 int slot_num
, timeout
= conf
.stream_timeout_arg
;
897 gettimeofday(&now
, NULL
);
898 FOR_EACH_SLOT(slot_num
) {
899 struct slot_info
*s
= &slot
[slot_num
];
902 /* check read time */
903 if (s
->receiver_node
&&
904 now
.tv_sec
> s
->rtime
.tv_sec
+ timeout
) {
905 PARA_INFO_LOG("%s stream (slot %d) not ready\n",
906 audio_formats
[s
->format
], slot_num
);
907 s
->receiver_node
->eof
= 1;
912 static void close_decoder_if_idle(int slot_num
)
914 struct slot_info
*s
= &slot
[slot_num
];
922 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
924 close_filters(s
->fc
);
926 close_receiver(slot_num
);
927 clear_slot(slot_num
);
930 static void audiod_pre_select(struct sched
*s
, __a_unused
struct task
*t
)
934 if (audiod_status
!= AUDIOD_ON
)
937 open_current_receiver(&s
->now
);
940 struct receiver_node
*rn
;
942 close_decoder_if_idle(i
);
943 if (slot
[i
].format
< 0)
945 rn
= slot
[i
].receiver_node
;
946 if (rn
&& rn
->loaded
&& !slot
[i
].wng
) {
948 open_writer(i
, &s
->now
);
953 static void audiod_post_select(struct sched
*s
, __a_unused
struct task
*t
)
958 struct receiver_node
*rn
= slot
[i
].receiver_node
;
960 if (rn
&& rn
->loaded
)
961 slot
[i
].rtime
= s
->now
;
965 static void init_audiod_task(struct audiod_task
*at
)
967 at
->task
.pre_select
= audiod_pre_select
;
968 at
->task
.post_select
= audiod_post_select
;
969 at
->task
.private_data
= at
;
971 sprintf(at
->task
.status
, "audiod task");
974 static int parse_stream_command(const char *txt
, char **cmd
)
976 char *p
= strchr(txt
, ':');
980 return -E_MISSING_COLON
;
982 FOR_EACH_AUDIO_FORMAT(i
) {
983 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
988 return -E_UNSUPPORTED_AUDIO_FORMAT
;
991 static int add_filter(int format
, char *cmdline
)
993 struct audio_format_info
*a
= &afi
[format
];
994 int filter_num
, nf
= a
->num_filters
;
996 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
999 a
->filters
[nf
] = &filters
[filter_num
];
1001 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
1002 a
->filters
[nf
]->name
);
1006 static int setup_default_filters(void)
1010 FOR_EACH_AUDIO_FORMAT(i
) {
1011 struct audio_format_info
*a
= &afi
[i
];
1016 /* add "dec" to audio format name */
1017 tmp
= make_message("%sdec", audio_formats
[i
]);
1018 for (j
= 0; filters
[j
].name
; j
++)
1019 if (!strcmp(tmp
, filters
[j
].name
))
1022 ret
= -E_UNSUPPORTED_FILTER
;
1023 if (!filters
[j
].name
)
1025 tmp
= para_strdup(filters
[j
].name
);
1026 ret
= add_filter(i
, tmp
);
1030 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
1032 ret
= add_filter(i
, "wav");
1035 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats
[i
]);
1041 static int init_writers(void)
1045 struct audio_format_info
*a
;
1047 init_supported_writers();
1048 nw
= PARA_MAX(1, conf
.writer_given
);
1049 PARA_INFO_LOG("allocating space for %d writers\n", nw
);
1050 FOR_EACH_AUDIO_FORMAT(i
) {
1052 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
1053 a
->writers
= para_malloc(nw
* sizeof(struct writer
*));
1056 for (i
= 0; i
< conf
.writer_given
; i
++) {
1059 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
1063 nw
= a
->num_writers
;
1064 wconf
= check_writer_arg(cmd
, &writer_num
);
1069 a
->writers
[nw
] = &writers
[ret
];
1070 a
->writer_conf
[nw
] = wconf
;
1071 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
1072 nw
, writer_names
[writer_num
]);
1080 static int init_receivers(void)
1082 int i
, ret
, receiver_num
;
1084 struct audio_format_info
*a
;
1086 for (i
= 0; receivers
[i
].name
; i
++) {
1087 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
1088 receivers
[i
].init(&receivers
[i
]);
1090 for (i
= 0; i
< conf
.receiver_given
; i
++) {
1091 char *arg
= conf
.receiver_arg
[i
];
1092 char *recv
= strchr(arg
, ':');
1093 ret
= -E_MISSING_COLON
;
1098 ret
= get_audio_format_num(arg
);
1101 afi
[ret
].receiver_conf
= check_receiver_arg(recv
, &receiver_num
);
1102 if (!afi
[ret
].receiver_conf
) {
1103 ret
= -E_RECV_SYNTAX
;
1106 afi
[ret
].receiver
= &receivers
[receiver_num
];
1108 /* use the first available receiver with no arguments
1109 * for those audio formats for which no receiver
1112 cmd
= para_strdup(receivers
[0].name
);
1113 FOR_EACH_AUDIO_FORMAT(i
) {
1115 if (a
->receiver_conf
)
1117 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
1118 if (!a
->receiver_conf
)
1119 return -E_RECV_SYNTAX
;
1120 a
->receiver
= &receivers
[receiver_num
];
1127 static int init_filters(void)
1131 filter_init(filters
);
1132 nf
= PARA_MAX(2, conf
.filter_given
) + 1;
1133 PARA_INFO_LOG("allocating space for %d filters\n", nf
);
1134 FOR_EACH_AUDIO_FORMAT(i
) {
1135 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
1136 afi
[i
].filters
= para_malloc(nf
* sizeof(struct filter
*));
1138 if (!conf
.no_default_filters_given
)
1139 return setup_default_filters();
1140 for (i
= 0; i
< conf
.filter_given
; i
++) {
1141 char *arg
= conf
.filter_arg
[i
];
1142 char *filter_name
= strchr(arg
, ':');
1143 ret
= -E_MISSING_COLON
;
1146 *filter_name
= '\0';
1148 ret
= get_audio_format_num(arg
);
1151 ret
= add_filter(ret
, filter_name
);
1160 static int init_stream_io(void)
1164 ret
= init_writers();
1167 ret
= init_receivers();
1170 ret
= init_filters();
1176 static int dump_commands(int fd
)
1178 char *buf
= para_strdup(""), *tmp
= NULL
;
1182 FOR_EACH_COMMAND(i
) {
1183 tmp
= make_message("%s%s\t%s\n", buf
, cmds
[i
].name
,
1184 cmds
[i
].description
);
1188 ret
= client_write(fd
, buf
);
1194 * command handlers don't close their fd on errors (ret < 0) so that
1195 * its caller can send an error message. Otherwise (ret >= 0) it's up
1196 * to each individual command to close the fd if necessary.
1199 static int com_help(int fd
, int argc
, char **argv
)
1203 const char *dflt
= "No such command. Available commands:\n";
1206 ret
= dump_commands(fd
);
1209 FOR_EACH_COMMAND(i
) {
1210 if (strcmp(cmds
[i
].name
, argv
[1]))
1213 "NAME\n\t%s -- %s\n"
1214 "SYNOPSIS\n\tpara_audioc %s\n"
1215 "DESCRIPTION\n%s\n",
1217 cmds
[i
].description
,
1221 ret
= client_write(fd
, buf
);
1225 ret
= client_write(fd
, dflt
);
1227 ret
= dump_commands(fd
);
1234 static int com_stat(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1238 long unsigned mask
= ~0LU;
1242 for (i
= 1; i
< argc
; i
++) {
1243 ret
= stat_item_valid(argv
[i
]);
1249 PARA_INFO_LOG("mask: 0x%lx\n", mask
);
1250 if (mask
& (1 << SI_PLAY_TIME
)) {
1251 struct timeval
*t
= wstime();
1252 char *ts
= get_time_string(t
);
1254 ret
= client_write(fd
, ts
);
1260 if (mask
& (1 << SI_AUDIOD_UPTIME
)) {
1261 char *tmp
, *us
= uptime_str();
1262 tmp
= make_message("%s:%s\n",
1263 status_item_list
[SI_AUDIOD_UPTIME
], us
);
1265 ret
= client_write(fd
, tmp
);
1270 if (mask
& (1 << SI_AUDIOD_STATUS
)) {
1271 char *s
= audiod_status_string();
1272 ret
= client_write(fd
, s
);
1277 if (mask
& (1 << SI_DECODER_FLAGS
)) {
1278 char *df
=decoder_flags();
1279 ret
= client_write(fd
, df
);
1285 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
1287 if (!((1 << i
) & mask
))
1289 v
= stat_item_values
[i
];
1290 tmp
= make_message("%s%s%s", buf
? buf
: "",
1291 v
? v
: "", v
? "\n" : "");
1295 ret
= client_write(fd
, buf
);
1298 ret
= stat_client_add(fd
, mask
);
1303 static int com_grab(int fd
, char *cmdline
)
1305 struct grab_client
*gc
;
1306 struct filter_node
*fn
;
1310 gc
= grab_client_new(fd
, cmdline
, &err
);
1313 fn
= find_filter_node(gc
->conf
->slot_arg
, gc
->audio_format_num
, gc
->conf
->filter_num_arg
);
1315 activate_grab_client(gc
, fn
);
1318 if (err
!= -E_GC_HELP_GIVEN
&& err
!= -E_GC_VERSION_GIVEN
)
1320 if (err
== -E_GC_HELP_GIVEN
) {
1321 msg
= make_message("%s\n\n", grab_client_args_info_usage
);
1322 for (i
= 0; grab_client_args_info_help
[i
]; i
++) {
1323 char *tmp
= make_message("%s%s\n", msg
,
1324 grab_client_args_info_help
[i
]);
1329 msg
= make_message("%s %s\n",
1330 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE
,
1331 GRAB_CLIENT_CMDLINE_PARSER_VERSION
);
1332 err
= client_write(fd
, msg
);
1340 static int __noreturn
com_term(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1343 clean_exit(EXIT_SUCCESS
, "terminating on user request");
1346 static int com_on(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1348 audiod_status
= AUDIOD_ON
;
1353 static int com_off(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1355 audiod_status
= AUDIOD_OFF
;
1360 static int com_sb(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1362 audiod_status
= AUDIOD_STANDBY
;
1367 static int com_cycle(int fd
, int argc
, char **argv
)
1369 switch (audiod_status
) {
1371 return com_sb(fd
, argc
, argv
);
1374 return com_on(fd
, argc
, argv
);
1376 case AUDIOD_STANDBY
:
1377 return com_off(fd
, argc
, argv
);
1384 static int check_perms(uid_t uid
)
1388 if (!conf
.user_allow_given
)
1390 for (i
= 0; i
< conf
.user_allow_given
; i
++)
1391 if (uid
== conf
.user_allow_arg
[i
])
1393 return -E_UCRED_PERM
;
1396 static int handle_connect(void)
1398 int i
, argc
, ret
, clifd
= -1;
1399 char *cmd
= NULL
, *p
, *buf
= para_calloc(MAXLINE
), **argv
= NULL
;
1400 struct sockaddr_un unix_addr
;
1402 ret
= para_accept(cmd_task
->fd
, &unix_addr
, sizeof(struct sockaddr_un
));
1406 ret
= recv_cred_buffer(clifd
, buf
, MAXLINE
- 1);
1409 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret
, buf
);
1410 ret
= check_perms(ret
);
1413 ret
= -E_INVALID_AUDIOD_CMD
;
1414 cmd
= para_strdup(buf
);
1415 p
= strchr(cmd
, '\n');
1422 for (i
= 0; cmds
[i
].name
; i
++) {
1424 if (strcmp(cmds
[i
].name
, cmd
))
1426 if (cmds
[i
].handler
) {
1427 argc
= split_args(buf
, &argv
, "\n");
1428 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv
[0], argc
);
1429 ret
= cmds
[i
].handler(clifd
, argc
, argv
);
1432 for (j
= 0; p
[j
]; j
++)
1435 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd
, p
);
1436 ret
= cmds
[i
].line_handler(clifd
, p
);
1439 ret
= -E_INVALID_AUDIOD_CMD
; /* cmd not found */
1444 if (clifd
> 0 && ret
< 0 && ret
!= -E_CLIENT_WRITE
) {
1445 char *tmp
= make_message("%s\n", PARA_STRERROR(-ret
));
1446 client_write(clifd
, tmp
);
1453 static void audiod_get_socket(void)
1455 struct sockaddr_un unix_addr
;
1457 if (conf
.socket_given
)
1458 socket_name
= para_strdup(conf
.socket_arg
);
1460 char *hn
= para_hostname();
1461 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
1465 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name
);
1466 if (conf
.force_given
)
1467 unlink(socket_name
);
1468 cmd_task
->fd
= create_pf_socket(socket_name
, &unix_addr
,
1469 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
1470 if (cmd_task
->fd
< 0) {
1471 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1472 exit(EXIT_FAILURE
); /* do not unlink socket */
1474 if (listen(cmd_task
->fd
, 5) < 0) {
1475 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1476 exit(EXIT_FAILURE
); /* do not unlink socket */
1478 add_close_on_fork_list(cmd_task
->fd
);
1481 static int open_stat_pipe(void)
1483 int ret
, fd
[3] = {-1, 1, 0};
1485 ret
= para_exec_cmdline_pid(&pid
, BINDIR
"/para_client stat", fd
);
1488 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret
);
1489 add_close_on_fork_list(ret
);
1491 clean_exit(EXIT_FAILURE
, "failed to open status pipe");
1495 void signal_event_handler(struct task
*t
)
1497 struct signal_task
*st
= t
->private_data
;
1498 handle_signal(st
->signum
);
1501 void signal_pre_select(struct sched
*s
, struct task
*t
)
1503 struct signal_task
*st
= t
->private_data
;
1505 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
1508 void signal_post_select(struct sched
*s
, struct task
*t
)
1510 struct signal_task
*st
= t
->private_data
;
1512 if (!FD_ISSET(st
->fd
, &s
->rfds
))
1514 t
->ret
= -E_SIGNAL_CAUGHT
;
1515 st
->signum
= para_next_signal();
1518 void signal_setup_default(struct signal_task
*st
)
1520 st
->task
.pre_select
= signal_pre_select
;
1521 st
->task
.post_select
= signal_post_select
;
1522 st
->task
.private_data
= st
;
1524 sprintf(st
->task
.status
, "signal task");
1527 static void command_pre_select(struct sched
*s
, struct task
*t
)
1529 struct command_task
*ct
= t
->private_data
;
1530 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1534 static void command_post_select(struct sched
*s
, struct task
*t
)
1537 struct command_task
*ct
= t
->private_data
;
1539 if (audiod_status
!= AUDIOD_OFF
)
1540 audiod_status_dump();
1541 t
->ret
= 1; /* always successful */
1542 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
1544 ret
= handle_connect();
1546 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
1549 void init_command_task(struct command_task
*ct
)
1551 ct
->task
.pre_select
= command_pre_select
;
1552 ct
->task
.post_select
= command_post_select
;
1553 ct
->task
.private_data
= ct
;
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)
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
[])
1633 hostname
= para_hostname();
1634 cmdline_parser(argc
, argv
, &conf
);
1635 para_drop_privileges(conf
.user_arg
, conf
.group_arg
);
1636 cf
= configfile_exists();
1638 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0)) {
1639 PARA_EMERG_LOG("%s", "parse error in config file\n");
1643 if (conf
.logfile_given
)
1644 logfile
= open_log(conf
.logfile_arg
);
1645 log_welcome("para_audiod", conf
.loglevel_arg
);
1646 i
= init_stream_io();
1648 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i
));
1651 server_uptime(UPTIME_SET
);
1652 set_initial_status();
1656 setup_signal_handling();
1657 if (conf
.daemon_given
)
1659 audiod_get_socket(); /* doesn't return on errors */
1661 signal_setup_default(sig_task
);
1662 sig_task
->task
.event_handler
= signal_event_handler
;
1664 init_status_task(stat_task
);
1665 init_command_task(cmd_task
);
1666 init_audiod_task(at
);
1668 register_task(&sig_task
->task
);
1669 register_task(&cmd_task
->task
);
1670 register_task(&stat_task
->task
);
1671 register_task(&at
->task
);
1672 s
.default_timeout
.tv_sec
= 0;
1673 s
.default_timeout
.tv_usec
= 99 * 1000;
1676 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
1677 return EXIT_FAILURE
;