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"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
38 /** define the array of error lists needed by para_audiod */
40 /** define the array containing all supported audio formats */
41 DEFINE_AUDIO_FORMAT_ARRAY
;
44 * the possible modes of operation
46 * - off: disconnect from para_server
47 * - on: receive status information from para_server and play the audio stream
48 * - sb: only receive status information but not the audio stream
50 enum {AUDIOD_OFF
, AUDIOD_ON
, AUDIOD_STANDBY
};
52 /** defines how to handle one supported audio format */
53 struct audio_format_info
{
54 /** pointer to the receiver for this audio format */
55 struct receiver
*receiver
;
56 /** the receiver configuration */
58 /** the number of filters that should be activated for this audio format */
59 unsigned int num_filters
;
60 /** pointer to the array of filters to be activated */
61 struct filter
**filters
;
62 /** pointer to the array of filter configurations */
64 /** output of the last filter is written to stdin of this command */
66 /** do not start receiver/filters/writer before this time */
67 struct timeval restart_barrier
;
71 * describes one instance of a receiver-filter-writer chain
73 * \sa receier_node, receiver, filter, filter_node, filter_chain_info
76 /** number of the audio format in this slot */
78 /** the file descriptor of the writer */
80 /** the process id of the writer */
82 /** time of the last successful read from the receiver */
84 /** time the last write to the write fd happend */
86 /** writer start time */
87 struct timeval wstime
;
88 /** did we include \a write_fd in the fdset */
90 /** set to one if we have sent the TERM signal to \a wpid */
92 /** the receiver info associated with this slot */
93 struct receiver_node
*receiver_node
;
94 /** the active filter chain */
95 struct filter_chain_info
*fci
;
98 static struct slot_info slot
[MAX_STREAM_SLOTS
];
100 /** defines one command of para_audiod */
101 struct audiod_command
{
102 /** the name of the command */
104 /** pointer to the function that handles the command */
105 int (*handler
)(int, int, char**);
106 /** one-line description of the command */
107 const char *description
;
108 /** summary of the command line options */
109 const char *synopsis
;
110 /** the long help text */
114 extern const char *status_item_list
[NUM_STAT_ITEMS
];
116 static int com_grab(int, int, char **);
117 static int com_cycle(int, int, char **);
118 static int com_help(int, int, char **);
119 static int com_off(int, int, char **);
120 static int com_on(int, int, char **);
121 static int com_sb(int, int, char **);
122 static int com_stat(int, int, char **);
123 static int com_term(int, int, char **);
124 static int stat_pipe
= -1, signal_pipe
;
126 static struct gengetopt_args_info conf
;
127 static struct timeval server_stream_start
, sa_time_diff
;
128 static int playing
, current_decoder
= -1,
129 audiod_status
= AUDIOD_ON
, offset_seconds
, length_seconds
,
130 sa_time_diff_sign
= 1, audiod_socket
= -1;
131 static char *af_status
, /* the audio format announced in server status */
132 *socket_name
, *hostname
;
133 static char *stat_item_values
[NUM_STAT_ITEMS
];
134 static FILE *logfile
;
135 static const struct timeval restart_delay
= {0, 300 * 1000};
137 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
139 static struct audiod_command cmds
[] = {
142 .handler
= com_cycle
,
143 .description
= "switch to next mode",
147 "on -> standby -> off -> on\n"
153 .description
= "grab the audio stream",
154 .synopsis
= "-- grab [grab_options]",
156 "grab ('splice') the audio stream at any position in the filter \n"
157 "chain and send that data back to the client. \n"
158 "Available options:\n\n"
164 .description
= "display command list or help for given command",
165 .synopsis
= "help [command]",
168 "When I was younger, so much younger than today, I never needed\n"
169 "anybody's help in any way. But now these days are gone, I'm not so\n"
170 "self assured. Now I find I've changed my mind and opened up the doors.\n"
172 " -- Beatles: Help\n"
178 .description
= "deactivate para_audiod",
182 "Close connection to para_server and stop all decoders.\n"
188 .description
= "activate para_audiod",
192 "Establish connection to para_server, retrieve para_server's current\n"
193 "status. If playing, start corresponding decoder. Otherwise stop\n"
200 .description
= "enter standby mode",
204 "Stop all decoders but leave connection to para_server open.\n"
210 .description
= "print status information",
214 "Add para_audiod status information to para_server's status information\n"
215 "and dump everything to stdout.\n"
221 .description
= "terminate audiod",
225 "Stop all decoders, shut down connection to para_server and exit.\n"
233 /** iterate over all slots */
234 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
235 /** iterate over all supported audio formats */
236 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
237 /** iterate over the array of all audiod commands */
238 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
241 * get the audio format number
242 * \param name the name of the audio format
244 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
245 * \a name is not a supported audio format.
247 int get_audio_format_num(char *name
)
250 FOR_EACH_AUDIO_FORMAT(i
)
251 if (!strcmp(name
, audio_formats
[i
]))
253 return -E_UNSUPPORTED_AUDIO_FORMAT
;
257 * log function. first argument is loglevel.
259 void para_log(int ll
, const char* fmt
,...)
265 char str
[MAXLINE
] = "";
267 if (ll
< conf
.loglevel_arg
)
269 if (!logfile
&& conf
.logfile_given
)
270 logfile
= open_log(conf
.logfile_arg
);
271 if (!logfile
&& conf
.daemon_given
)
282 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
283 fprintf(outfd
, "%s %s ", str
, hostname
);
284 if (conf
.loglevel_arg
<= INFO
)
285 fprintf(outfd
, "%i ", ll
);
287 vfprintf(outfd
, fmt
, argp
);
291 static int client_write(int fd
, const char *buf
)
293 size_t len
= strlen(buf
);
294 return write(fd
, buf
, len
) != len
? -E_CLIENT_WRITE
: 1;
297 static char *get_time_string(struct timeval
*newest_stime
)
299 struct timeval now
, diff
, adj_stream_start
, tmp
;
300 int total
= 0, use_server_time
= 1;
305 return make_message("%s:", status_item_list
[SI_PLAY_TIME
]);
307 if (audiod_status
== AUDIOD_OFF
)
309 if (sa_time_diff_sign
> 0)
310 tv_diff(&server_stream_start
, &sa_time_diff
,
313 tv_add(&server_stream_start
, &sa_time_diff
,
315 tmp
= adj_stream_start
;
316 if (newest_stime
&& audiod_status
== AUDIOD_ON
) {
317 tv_diff(newest_stime
, &adj_stream_start
, &diff
);
318 if (tv2ms(&diff
) < 5000) {
323 gettimeofday(&now
, NULL
);
324 tv_diff(&now
, &tmp
, &diff
);
325 total
= diff
.tv_sec
+ offset_seconds
;
326 if (total
> length_seconds
)
327 total
= length_seconds
;
332 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
333 status_item_list
[SI_PLAY_TIME
],
334 use_server_time
? "~" : "",
337 (length_seconds
- total
) / 60,
338 (length_seconds
- total
) % 60,
339 length_seconds
? (total
* 100 + length_seconds
/ 2) /
346 static char *audiod_status_string(void)
349 struct timeval
*newest_stime
= NULL
;
350 char *ret
, *time_string
, *uptime_string
, *decoder_flags
=
351 para_malloc((MAX_STREAM_SLOTS
+ 1) * sizeof(char));
354 struct slot_info
*s
= &slot
[i
];
356 if (s
->receiver_node
)
361 flag
+= s
->format
* 4;
362 decoder_flags
[i
] = flag
;
365 if (newest_stime
&& tv_diff(&s
->wstime
, newest_stime
, NULL
) <= 0)
367 newest_stime
= &s
->wstime
;
369 decoder_flags
[MAX_STREAM_SLOTS
] = '\0';
370 time_string
= get_time_string(newest_stime
);
371 uptime_string
= uptime_str();
372 ret
= make_message("%s:%s\n%s:%s\n%s:%s",
373 status_item_list
[SI_AUDIOD_UPTIME
], uptime_string
,
374 status_item_list
[SI_DECODER_FLAGS
], decoder_flags
,
375 status_item_list
[SI_AUDIOD_STATUS
], audiod_status
== AUDIOD_ON
?
376 "on" : (audiod_status
== AUDIOD_OFF
? "off": "sb"));
378 ret
= make_message("%s\n%s", ret
, time_string
);
385 static char *configfile_exists(void)
387 static char *config_file
;
390 char *home
= para_homedir();
391 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
394 return file_exists(config_file
)? config_file
: NULL
;
397 static void setup_signal_handling(void)
399 signal_pipe
= para_signal_init();
400 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe
);
401 para_install_sighandler(SIGINT
);
402 para_install_sighandler(SIGTERM
);
403 para_install_sighandler(SIGCHLD
);
404 para_install_sighandler(SIGHUP
);
405 signal(SIGPIPE
, SIG_IGN
);
408 static void audiod_status_dump(void)
410 static char *prev_status
;
411 char *tmp
= audiod_status_string();
413 if (!prev_status
|| strcmp(tmp
, prev_status
))
414 stat_client_write(tmp
);
419 static void clear_slot(int slot_num
)
421 struct slot_info
*s
= &slot
[slot_num
];
423 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
424 memset(s
, 0, sizeof(struct slot_info
));
428 static void kill_stream_writer(int slot_num
)
430 struct slot_info
*s
= &slot
[slot_num
];
432 if (s
->format
< 0 || s
->wkilled
|| s
->wpid
<= 0)
434 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
435 s
->wpid
, audio_formats
[s
->format
], slot_num
);
436 kill(s
->wpid
, SIGTERM
);
441 static void set_restart_barrier(int format
, struct timeval
*now
)
448 gettimeofday(&tmp
, NULL
);
449 tv_add(&tmp
, &restart_delay
, &afi
[format
].restart_barrier
);
452 static void close_receiver(int slot_num
)
454 struct slot_info
*s
= &slot
[slot_num
];
455 struct audio_format_info
*a
;
457 if (s
->format
< 0 || !s
->receiver_node
)
460 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
461 audio_formats
[s
->format
] , slot_num
);
462 a
->receiver
->close(s
->receiver_node
);
463 free(s
->receiver_node
);
464 s
->receiver_node
= NULL
;
465 set_restart_barrier(s
->format
, NULL
);
468 static void kill_all_decoders(void)
473 if (slot
[i
].format
>= 0) {
474 PARA_INFO_LOG("stopping decoder in slot %d\n", i
);
475 kill_stream_writer(i
);
479 static void check_sigchld(void)
484 gettimeofday(&now
, NULL
);
487 pid
= para_reap_child();
491 struct slot_info
*s
= &slot
[i
];
495 if (pid
== s
->wpid
) {
497 lifetime
= now
.tv_sec
- s
->wstime
.tv_sec
;
498 PARA_INFO_LOG("%s stream writer in slot %d died "
500 audio_formats
[s
->format
], i
, lifetime
);
501 set_restart_barrier(s
->format
, &now
);
502 goto reap_next_child
;
505 PARA_CRIT_LOG("para_client died (pid %d)\n", pid
);
506 goto reap_next_child
;
509 static int get_empty_slot(void)
520 if (s
->write_fd
> 0 || s
->wpid
> 0)
522 if (s
->receiver_node
)
529 return -E_NO_MORE_SLOTS
;
532 static int decoder_running(int format
)
539 if (s
->format
== format
&& s
->receiver_node
)
541 if (s
->format
== format
&& s
->wpid
> 0)
547 static void close_stat_pipe(void)
553 PARA_NOTICE_LOG("%s", "closing status pipe\n");
555 del_close_on_fork_list(stat_pipe
);
558 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
559 free(stat_item_values
[i
]);
560 stat_item_values
[i
] = NULL
;
565 audiod_status_dump();
567 stat_item_values
[SI_STATUS_BAR
] = make_message("%s:no connection to para_server\n",
568 status_item_list
[SI_STATUS_BAR
]);
569 stat_client_write(stat_item_values
[SI_STATUS_BAR
]);
572 static void __noreturn
clean_exit(int status
, const char *msg
)
574 PARA_EMERG_LOG("%s\n", msg
);
583 __malloc
static char *glob_cmd(char *cmd
)
585 char *ret
, *replacement
;
586 struct timeval tmp
, delay
, rss
; /* real stream start */
588 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
589 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
590 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
591 if (sa_time_diff_sign
< 0)
592 tv_add(&server_stream_start
, &sa_time_diff
, &rss
);
594 tv_diff(&server_stream_start
, &sa_time_diff
, &rss
);
595 tv_add(&rss
, &delay
, &tmp
);
596 replacement
= make_message("%lu:%lu", tmp
.tv_sec
, tmp
.tv_usec
);
597 ret
= s_a_r(cmd
, "STREAM_START", replacement
);
601 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd
, ret
);
604 gettimeofday(&now
, NULL
);
605 PARA_INFO_LOG("now: %lu:%lu\n", now
.tv_sec
, now
.tv_usec
);
611 /** get the number of filters for the given audio format */
612 int num_filters(int audio_format_num
)
614 return afi
[audio_format_num
].num_filters
;
617 static void open_filters(int slot_num
)
619 struct slot_info
*s
= &slot
[slot_num
];
620 struct audio_format_info
*a
= &afi
[s
->format
];
621 int nf
= a
->num_filters
;
624 s
->fci
= para_calloc(sizeof(struct filter_chain_info
));
625 INIT_LIST_HEAD(&s
->fci
->filters
);
628 s
->fci
->inbuf
= s
->receiver_node
->buf
;
629 s
->fci
->in_loaded
= &s
->receiver_node
->loaded
;
630 s
->fci
->outbuf
= s
->receiver_node
->buf
;
631 s
->fci
->out_loaded
= &s
->receiver_node
->loaded
;
632 s
->fci
->eof
= &s
->receiver_node
->eof
;
633 for (i
= 0; i
< nf
; i
++) {
634 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
635 fn
->conf
= a
->filter_conf
[i
];
637 fn
->filter
= a
->filters
[i
];
638 INIT_LIST_HEAD(&fn
->callbacks
);
639 list_add_tail(&fn
->node
, &s
->fci
->filters
);
640 fn
->filter
->open(fn
);
641 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
642 audio_formats
[s
->format
], i
+ 1, nf
,
643 fn
->filter
->name
, slot_num
);
644 s
->fci
->outbuf
= fn
->buf
;
645 s
->fci
->out_loaded
= &fn
->loaded
;
647 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s
->fci
,
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
->fci
)
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
->fci
->filters
, node
)
669 if (filternum
<= 0 || j
++ == filternum
)
676 static void start_stream_writer(int slot_num
)
678 int ret
, fds
[3] = {1, -1, -1};
679 struct slot_info
*s
= &slot
[slot_num
];
680 struct audio_format_info
*a
= &afi
[s
->format
];
684 glob
= glob_cmd(a
->write_cmd
);
686 glob
= para_strdup("para_play");
687 PARA_INFO_LOG("starting stream writer: %s\n", glob
);
688 open_filters(slot_num
);
689 ret
= para_exec_cmdline_pid(&s
->wpid
, glob
, fds
);
692 PARA_ERROR_LOG("exec failed (%d)\n", ret
);
695 s
->write_fd
= fds
[0];
696 add_close_on_fork_list(s
->write_fd
);
697 /* we write to this fd in do_select, so we need non-blocking */
698 fcntl(s
->write_fd
, F_SETFL
, O_NONBLOCK
);
699 gettimeofday(&s
->wstime
, NULL
);
700 current_decoder
= slot_num
;
701 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fci
->filters
);
704 static void open_receiver(int format
)
706 struct audio_format_info
*a
= &afi
[format
];
710 slot_num
= get_empty_slot();
712 clean_exit(EXIT_FAILURE
, PARA_STRERROR(-slot_num
));
715 gettimeofday(&s
->rtime
, NULL
);
717 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
718 s
->receiver_node
->conf
= a
->receiver_conf
;
719 ret
= a
->receiver
->open(s
->receiver_node
);
721 PARA_ERROR_LOG("failed to open receiver (%s)\n",
722 PARA_STRERROR(-ret
));
723 free(s
->receiver_node
);
724 s
->receiver_node
= NULL
;
727 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
728 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
731 static int is_frozen(int format
)
734 struct audio_format_info
*a
= &afi
[format
];
736 gettimeofday(&now
, NULL
);
737 return (tv_diff(&now
, &a
->restart_barrier
, NULL
) > 0)? 0 : 1;
740 static void start_current_receiver(void)
746 i
= get_audio_format_num(af_status
);
749 if ((decoder_running(i
) & 1) || is_frozen(i
))
754 static void compute_time_diff(const struct timeval
*status_time
)
756 struct timeval now
, tmp
, diff
;
759 const struct timeval max_deviation
= {0, 500 * 1000};
760 const int time_smooth
= 5;
762 gettimeofday(&now
, NULL
);
763 sign
= tv_diff(status_time
, &now
, &diff
);
764 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
765 // sign, sa_time_diff_sign);
767 sa_time_diff_sign
= sign
;
773 int s
= tv_diff(&diff
, &sa_time_diff
, &tmp
);
774 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
775 PARA_WARNING_LOG("time diff jump: %lims\n",
779 sa_time_diff_sign
= tv_convex_combination(
780 sa_time_diff_sign
* time_smooth
, &sa_time_diff
,
781 count
> 10? sign
: sign
* time_smooth
, &diff
,
784 PARA_INFO_LOG("time diff (cur/avg): "
786 sign
* diff
.tv_sec
, (diff
.tv_usec
+ 500) / 1000,
787 sa_time_diff_sign
* sa_time_diff
.tv_sec
,
788 (sa_time_diff
.tv_usec
+ 500)/ 1000);
791 static void check_stat_line(char *line
)
799 itemnum
= stat_line_valid(line
);
801 PARA_WARNING_LOG("invalid status line: %s\n", line
);
804 stat_client_write(line
);
805 free(stat_item_values
[itemnum
]);
806 stat_item_values
[itemnum
] = para_strdup(line
);
807 ilen
= strlen(status_item_list
[itemnum
]);
810 playing
= strstr(line
, "playing")? 1 : 0;
814 af_status
= para_strdup(line
+ ilen
+ 1);
817 offset_seconds
= atoi(line
+ ilen
+ 1);
820 length_seconds
= atoi(line
+ ilen
+ 1);
822 case SI_STREAM_START
:
823 if (sscanf(line
+ ilen
+ 1, "%lu.%lu",
824 &tv
.tv_sec
, &tv
.tv_usec
) == 2)
825 server_stream_start
= tv
;
827 case SI_CURRENT_TIME
:
828 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &tv
.tv_sec
,
830 compute_time_diff(&tv
);
835 static void handle_signal(int sig
)
839 return check_sigchld();
843 PARA_EMERG_LOG("terminating on signal %d\n", sig
);
844 clean_exit(EXIT_FAILURE
, "caught deadly signal");
849 static void check_timeouts(void)
852 int slot_num
, timeout
= conf
.stream_timeout_arg
;
854 gettimeofday(&now
, NULL
);
855 FOR_EACH_SLOT(slot_num
) {
856 struct slot_info
*s
= &slot
[slot_num
];
859 /* check read time */
860 if (s
->receiver_node
&&
861 now
.tv_sec
> s
->rtime
.tv_sec
+ timeout
) {
862 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
863 audio_formats
[s
->format
], slot_num
);
867 close_receiver(slot_num
);
869 /* check write time */
870 if (s
->wpid
> 0 && !s
->wkilled
&&
871 now
.tv_sec
> s
->wtime
.tv_sec
+ timeout
) {
872 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
873 audio_formats
[s
->format
], slot_num
);
880 static size_t get_loaded_bytes(int slot_num
)
883 struct slot_info
*s
= &slot
[slot_num
];
884 struct receiver_node
*rn
= s
->receiver_node
;
889 if (afi
[s
->format
].num_filters
) {
891 loaded
= *s
->fci
->out_loaded
;
901 static void close_decoder_if_idle(int slot_num
)
903 struct slot_info
*s
= &slot
[slot_num
];
904 struct receiver_node
*rn
= s
->receiver_node
;
910 if (!rn
->eof
&& !s
->fci
->error
&& s
->wpid
> 0)
912 if (!s
->fci
->error
&& s
->wpid
> 0) { /* eof */
913 if (filter_io(s
->fci
) > 0)
915 if (get_loaded_bytes(slot_num
))
918 if (s
->write_fd
> 0) {
919 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num
,
922 del_close_on_fork_list(s
->write_fd
);
926 return; /* wait until writer dies before closing filters */
927 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
929 close_filters(s
->fci
);
931 close_receiver(slot_num
);
932 clear_slot(slot_num
);
935 static int set_stream_fds(fd_set
*wfds
)
937 int i
, max_fileno
= -1;
941 struct slot_info
*s
= &slot
[i
];
942 struct audio_format_info
*a
;
943 struct receiver_node
*rn
;
945 close_decoder_if_idle(i
);
950 rn
= s
->receiver_node
;
951 if (rn
&& rn
->loaded
&& !s
->wpid
) {
952 PARA_INFO_LOG("no writer in slot %d\n", i
);
953 start_stream_writer(i
);
955 if (s
->write_fd
<= 0)
957 if (!get_loaded_bytes(i
))
959 FD_SET(s
->write_fd
, wfds
);
961 max_fileno
= MAX(s
->write_fd
, max_fileno
);
963 // PARA_INFO_LOG("return %d\n", max_fileno);
967 static int write_audio_data(int slot_num
)
969 struct slot_info
*s
= &slot
[slot_num
];
970 struct audio_format_info
*a
= &afi
[s
->format
];
971 struct receiver_node
*rn
= s
->receiver_node
;
976 if (a
->num_filters
) {
977 buf
= &s
->fci
->outbuf
;
978 len
= s
->fci
->out_loaded
;
983 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf
, *len
);
984 rv
= write(s
->write_fd
, *buf
, *len
);
985 PARA_DEBUG_LOG("wrote %d/%zd\n", rv
, *len
);
987 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
988 slot_num
, s
->write_fd
, strerror(errno
));
990 s
->fci
->error
= E_WRITE_AUDIO_DATA
;
991 } else if (rv
!= *len
) {
992 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
993 audio_formats
[s
->format
], rv
, *len
, slot_num
);
995 memmove(*buf
, *buf
+ rv
, *len
);
999 gettimeofday(&s
->wtime
, NULL
);
1003 static void slot_io(fd_set
*wfds
)
1008 struct slot_info
*s
= &slot
[i
];
1009 struct receiver_node
*rn
= s
->receiver_node
;
1011 if (rn
&& rn
->loaded
)
1012 gettimeofday(&s
->rtime
, NULL
);
1013 if (s
->format
>= 0 && s
->write_fd
> 0 && s
->fci
) {
1014 ret
= filter_io(s
->fci
);
1016 s
->fci
->error
= -ret
;
1017 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1018 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1020 if (s
->write_fd
<= 0 || !s
->wcheck
|| !FD_ISSET(s
->write_fd
, wfds
))
1022 write_audio_data(i
);
1026 static int parse_stream_command(const char *txt
, char **cmd
)
1028 char *p
= strchr(txt
, ':');
1032 return -E_MISSING_COLON
;
1034 FOR_EACH_AUDIO_FORMAT(i
) {
1035 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
1040 return -E_UNSUPPORTED_AUDIO_FORMAT
;
1043 static int add_filter(int format
, char *cmdline
)
1045 struct audio_format_info
*a
= &afi
[format
];
1046 int filter_num
, nf
= a
->num_filters
;
1048 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
1051 a
->filters
[nf
] = &filters
[filter_num
];
1053 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
1054 a
->filters
[nf
]->name
);
1058 static int setup_default_filters(void)
1062 FOR_EACH_AUDIO_FORMAT(i
) {
1063 struct audio_format_info
*a
= &afi
[i
];
1068 /* add "dec" to audio format name */
1069 tmp
= make_message("%sdec", audio_formats
[i
]);
1070 for (j
= 0; filters
[j
].name
; j
++)
1071 if (!strcmp(tmp
, filters
[j
].name
))
1074 ret
= -E_UNSUPPORTED_FILTER
;
1075 if (!filters
[j
].name
)
1077 tmp
= para_strdup(filters
[j
].name
);
1078 ret
= add_filter(i
, tmp
);
1082 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
], filters
[j
].name
);
1083 ret
= add_filter(i
, para_strdup("wav"));
1086 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats
[i
]);
1092 static int init_stream_io(void)
1094 int i
, ret
, receiver_num
;
1097 for (i
= 0; i
< conf
.stream_write_cmd_given
; i
++) {
1098 ret
= parse_stream_command(conf
.stream_write_cmd_arg
[i
], &cmd
);
1101 afi
[ret
].write_cmd
= para_strdup(cmd
);
1102 PARA_INFO_LOG("%s write command: %s\n", audio_formats
[ret
], afi
[ret
].write_cmd
);
1104 for (i
= 0; receivers
[i
].name
; i
++) {
1105 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
1106 receivers
[i
].init(&receivers
[i
]);
1108 for (i
= 0; i
< conf
.receiver_given
; i
++) {
1109 char *arg
= conf
.receiver_arg
[i
];
1110 char *recv
= strchr(arg
, ':');
1111 ret
= -E_MISSING_COLON
;
1116 ret
= get_audio_format_num(arg
);
1119 afi
[ret
].receiver_conf
= check_receiver_arg(recv
, &receiver_num
);
1120 if (!afi
[ret
].receiver_conf
) {
1121 ret
= -E_RECV_SYNTAX
;
1124 afi
[ret
].receiver
= &receivers
[receiver_num
];
1126 /* use the first available receiver with no arguments
1127 * for those audio formats for which no receiver
1130 cmd
= para_strdup(receivers
[0].name
);
1131 FOR_EACH_AUDIO_FORMAT(i
) {
1132 struct audio_format_info
*a
= &afi
[i
];
1133 if (a
->receiver_conf
)
1135 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
1136 if (!a
->receiver_conf
)
1137 return -E_RECV_SYNTAX
;
1138 a
->receiver
= &receivers
[receiver_num
];
1142 filter_init(filters
);
1143 FOR_EACH_AUDIO_FORMAT(i
) {
1144 afi
[i
].filter_conf
= para_malloc((conf
.filter_given
+ 1) * sizeof(char *));
1145 afi
[i
].filters
= para_malloc((conf
.filter_given
+ 1) * sizeof(struct filter
*));
1147 if (!conf
.no_default_filters_given
)
1148 return setup_default_filters();
1149 for (i
= 0; i
< conf
.filter_given
; i
++) {
1150 char *arg
= conf
.filter_arg
[i
];
1151 char *filter_name
= strchr(arg
, ':');
1152 ret
= -E_MISSING_COLON
;
1155 *filter_name
= '\0';
1157 ret
= get_audio_format_num(arg
);
1160 ret
= add_filter(ret
, filter_name
);
1169 static int dump_commands(int fd
)
1171 char *buf
= para_strdup(""), *tmp
= NULL
;
1175 FOR_EACH_COMMAND(i
) {
1176 tmp
= make_message("%s%s\t%s\n", buf
, cmds
[i
].name
,
1177 cmds
[i
].description
);
1181 ret
= client_write(fd
, buf
);
1187 * command handlers don't close their fd on errors (ret < 0) so that
1188 * its caller can send an error message. Otherwise (ret >= 0) it's up
1189 * to each individual command to close the fd if necessary.
1192 static int com_help(int fd
, int argc
, char **argv
)
1196 const char *dflt
= "No such command. Available commands:\n";
1199 ret
= dump_commands(fd
);
1202 FOR_EACH_COMMAND(i
) {
1203 if (strcmp(cmds
[i
].name
, argv
[1]))
1206 "NAME\n\t%s -- %s\n"
1207 "SYNOPSIS\n\tpara_audioc %s\n"
1208 "DESCRIPTION\n%s\n",
1210 cmds
[i
].description
,
1214 ret
= client_write(fd
, buf
);
1218 ret
= client_write(fd
, dflt
);
1220 ret
= dump_commands(fd
);
1227 static int com_stat(int fd
, __unused
int argc
, __unused
char **argv
)
1230 char *buf
= make_message("%s\n", audiod_status_string());
1232 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
1233 char *tmp
, *v
= stat_item_values
[i
];
1234 tmp
= make_message("%s%s%s", buf
, v
? v
: "", v
? "\n" : "");
1238 ret
= client_write(fd
, buf
);
1240 ret
= stat_client_add(fd
);
1246 static char *list_filters(void)
1249 char *tmp
, *msg
= make_message("format\tnum\tcmd\n");
1251 FOR_EACH_AUDIO_FORMAT(i
) {
1252 for (j
= 0; j
< afi
[i
].num_filters
; j
++) {
1253 tmp
= make_message("%s\t%i\t%s\n",
1254 afi
[i
].name
, j
, afi
[i
].filter_cmds
[j
]);
1255 msg
= para_strcat(msg
, tmp
);
1258 tmp
= make_message("%s\t%i\t%s\n", afi
[i
].name
,
1259 j
, afi
[i
].write_cmd
);
1260 msg
= para_strcat(msg
, tmp
);
1267 static int com_grab(int fd
, int argc
, char **argv
)
1269 struct grab_client
*gc
;
1270 struct filter_node
*fn
;
1273 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1274 gc
= grab_client_new(fd
, argc
, argv
, &err
);
1275 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1278 fn
= find_filter_node(gc
->conf
->slot_arg
, gc
->audio_format_num
, gc
->conf
->filter_num_arg
);
1280 activate_grab_client(gc
, fn
);
1283 if (err
!= -E_GC_HELP_GIVEN
)
1285 err
= client_write(fd
, "Usage: para_audioc [audioc_options] -- "
1286 "grab [grab_options]\nAvailable options:\n");
1289 err
= client_write(fd
, GRAB_HELP_TXT
);
1296 static int __noreturn
com_term(int fd
, __unused
int argc
, __unused
char **argv
)
1299 clean_exit(EXIT_SUCCESS
, "terminating on user request");
1302 static int com_on(int fd
, __unused
int argc
, __unused
char **argv
)
1304 audiod_status
= AUDIOD_ON
;
1309 static int com_off(int fd
, __unused
int argc
, __unused
char **argv
)
1311 audiod_status
= AUDIOD_OFF
;
1316 static int com_sb(int fd
, __unused
int argc
, __unused
char **argv
)
1318 audiod_status
= AUDIOD_STANDBY
;
1323 static int com_cycle(int fd
, int argc
, char **argv
)
1325 switch (audiod_status
) {
1327 return com_sb(fd
, argc
, argv
);
1330 return com_on(fd
, argc
, argv
);
1332 case AUDIOD_STANDBY
:
1333 return com_off(fd
, argc
, argv
);
1340 static int check_perms(struct ucred
*c
)
1344 if (!conf
.user_allow_given
)
1346 for (i
= 0; i
< conf
.user_allow_given
; i
++)
1347 if (c
->uid
== conf
.user_allow_arg
[i
])
1349 return -E_UCRED_PERM
;
1352 static int handle_connect(void)
1354 int i
, argc
, ret
, clifd
= -1;
1356 char *buf
= para_malloc(MAXLINE
), **argv
= NULL
;
1357 struct sockaddr_un unix_addr
;
1359 ret
= para_accept(audiod_socket
, &unix_addr
, sizeof(struct sockaddr_un
));
1363 ret
= recv_cred_buffer(clifd
, buf
, MAXLINE
- 1, &c
);
1366 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c
.pid
, c
.uid
, c
.gid
, ret
, buf
);
1368 ret
= check_perms(&c
);
1371 argc
= split_args(buf
, &argv
, '\n');
1372 PARA_INFO_LOG("argv[0]: %s\n", argv
[0]);
1373 for (i
= 0; cmds
[i
].name
; i
++) {
1374 if (strcmp(cmds
[i
].name
, argv
[0]))
1376 ret
= cmds
[i
].handler(clifd
, argc
+ 1, argv
);
1379 ret
= -E_INVALID_AUDIOD_CMD
; /* cmd not found */
1383 if (clifd
> 0 && ret
< 0 && ret
!= -E_CLIENT_WRITE
) {
1384 char *tmp
= make_message("%s\n", PARA_STRERROR(-ret
));
1385 client_write(clifd
, tmp
);
1392 static void audiod_get_socket(void)
1394 struct sockaddr_un unix_addr
;
1396 if (conf
.socket_given
)
1397 socket_name
= para_strdup(conf
.socket_arg
);
1399 char *hn
= para_hostname();
1400 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
1404 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name
);
1405 if (conf
.force_given
)
1406 unlink(socket_name
);
1407 audiod_socket
= create_pf_socket(socket_name
, &unix_addr
,
1408 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
1409 if (audiod_socket
< 0) {
1410 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1411 exit(EXIT_FAILURE
); /* do not unlink socket */
1413 if (listen(audiod_socket
, 5) < 0) {
1414 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1415 exit(EXIT_FAILURE
); /* do not unlink socket */
1417 add_close_on_fork_list(audiod_socket
);
1420 static int open_stat_pipe(void)
1422 int ret
, fd
[3] = {-1, 1, 0};
1424 ret
= para_exec_cmdline_pid(&pid
, BINDIR
"/para_client stat", fd
);
1427 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret
);
1428 add_close_on_fork_list(ret
);
1430 clean_exit(EXIT_FAILURE
, "failed to open status pipe");
1434 static int pre_select(fd_set
*rfds
, fd_set
*wfds
, struct timeval
*tv
)
1436 int i
, ret
, max
= -1;
1439 struct slot_info
*s
= &slot
[i
];
1440 struct audio_format_info
*a
;
1441 struct receiver_node
*rn
= s
->receiver_node
;
1442 if (s
->format
< 0 || !rn
)
1444 a
= &afi
[s
->format
];
1445 ret
= a
->receiver
->pre_select(rn
, rfds
, wfds
, tv
);
1446 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1447 max
= MAX(max
, ret
);
1452 static void audiod_post_select(int select_ret
, fd_set
*rfds
, fd_set
*wfds
)
1457 struct slot_info
*s
= &slot
[i
];
1458 struct audio_format_info
*a
;
1459 struct receiver_node
*rn
= s
->receiver_node
;
1460 if (s
->format
< 0 || !rn
|| rn
->eof
)
1462 a
= &afi
[s
->format
];
1463 ret
= a
->receiver
->post_select(rn
, select_ret
, rfds
, wfds
);
1466 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1467 a
->receiver
->name
, PARA_STRERROR(-ret
), i
);
1469 PARA_INFO_LOG("eof in slot %d\n", i
);
1472 if (ret
< 0 && s
->fci
)
1473 s
->fci
->error
= ret
;
1477 /* TODO: move everything before the select call to pre_select() */
1478 static void __noreturn
audiod_mainloop(void)
1481 int ret
, max_fileno
, sbo
= 0;
1482 char status_buf
[STRINGSIZE
] = "";
1488 if (audiod_status
!= AUDIOD_ON
)
1489 kill_all_decoders();
1491 start_current_receiver();
1492 max_fileno
= set_stream_fds(&wfds
);
1493 /* stat pipe (read) */
1494 if (stat_pipe
>= 0 && audiod_status
== AUDIOD_OFF
)
1496 if (stat_pipe
< 0 && audiod_status
!= AUDIOD_OFF
) {
1497 stat_pipe
= open_stat_pipe();
1499 status_buf
[0] = '\0';
1501 if (stat_pipe
>= 0 && audiod_status
!= AUDIOD_OFF
) {
1502 FD_SET(stat_pipe
, &rfds
);
1503 max_fileno
= MAX(max_fileno
, stat_pipe
);
1505 /* always check signal pipe */
1506 FD_SET(signal_pipe
, &rfds
);
1507 max_fileno
= MAX(max_fileno
, signal_pipe
);
1509 if (audiod_socket
< 0)
1510 audiod_get_socket(); /* doesn't return on errors */
1511 FD_SET(audiod_socket
, &rfds
);
1512 max_fileno
= MAX(max_fileno
, audiod_socket
);
1514 tv
.tv_usec
= 200 * 1000;
1515 ret
= pre_select(&rfds
, &wfds
, &tv
);
1516 max_fileno
= MAX(max_fileno
, ret
);
1517 ret
= select(max_fileno
+ 1, &rfds
, &wfds
, NULL
, &tv
);
1518 if (ret
< 0 && errno
!= EINTR
)
1519 PARA_ERROR_LOG("select returned %d (%s)\n", ret
,
1521 if (audiod_status
!= AUDIOD_OFF
)
1522 audiod_status_dump();
1525 audiod_post_select(ret
, &rfds
, &wfds
);
1526 /* read status pipe */
1527 if (stat_pipe
>=0 && FD_ISSET(stat_pipe
, &rfds
)) {
1528 ret
= read(stat_pipe
, status_buf
+ sbo
, STRINGSIZE
- 1 - sbo
);
1531 /* avoid busy loop if server is down */
1532 while (sleep(1) > 0)
1535 status_buf
[ret
+ sbo
] = '\0';
1536 sbo
= for_each_line(status_buf
, ret
+ sbo
,
1541 if (FD_ISSET(audiod_socket
, &rfds
)) {
1542 ret
= handle_connect();
1544 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
1548 if (FD_ISSET(signal_pipe
, &rfds
)) {
1549 int sig_nr
= para_next_signal();
1551 handle_signal(sig_nr
);
1556 static void set_initial_status(void)
1558 audiod_status
= AUDIOD_ON
;
1559 if (!conf
.mode_given
)
1561 if (!strcmp(conf
.mode_arg
, "sb")) {
1562 audiod_status
= AUDIOD_STANDBY
;
1565 if (!strcmp(conf
.mode_arg
, "off")) {
1566 audiod_status
= AUDIOD_OFF
;
1569 if (strcmp(conf
.mode_arg
, "on"))
1570 PARA_WARNING_LOG("%s", "invalid mode\n");
1573 int __noreturn
main(int argc
, char *argv
[])
1579 hostname
= para_hostname();
1580 cmdline_parser(argc
, argv
, &conf
);
1581 para_drop_privileges(conf
.user_arg
);
1582 cf
= configfile_exists();
1584 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0)) {
1585 fprintf(stderr
, "parse error in config file\n");
1589 log_welcome("para_audiod", conf
.loglevel_arg
);
1590 i
= init_stream_io();
1592 fprintf(stderr
, "init stream io error: %s\n",
1596 server_uptime(UPTIME_SET
);
1597 set_initial_status();
1601 setup_signal_handling();
1602 if (conf
.daemon_given
)