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"
31 #include "ringbuffer.h"
39 /** define the array of error lists needed by para_audiod */
41 /** define the array containing all supported audio formats */
42 DEFINE_AUDIO_FORMAT_ARRAY
;
45 * the possible modes of operation
47 * - off: disconnect from para_server
48 * - on: receive status information from para_server and play the audio stream
49 * - sb: only receive status information but not the audio stream
51 enum {AUDIOD_OFF
, AUDIOD_ON
, AUDIOD_STANDBY
};
53 /** defines how to handle one supported audio format */
54 struct audio_format_info
{
55 /** pointer to the receiver for this audio format */
56 struct receiver
*receiver
;
57 /** the receiver configuration */
59 /** the number of filters that should be activated for this audio format */
60 unsigned int num_filters
;
61 /** pointer to the array of filters to be activated */
62 struct filter
**filters
;
63 /** pointer to the array of filter configurations */
65 /** output of the last filter is written to stdin of this command */
67 /** do not start receiver/filters/writer before this time */
68 struct timeval restart_barrier
;
72 * describes one instance of a receiver-filter-writer chain
74 * \sa receier_node, receiver, filter, filter_node, filter_chain_info
77 /** number of the audio format in this slot */
79 /** the file descriptor of the writer */
81 /** the process id of the writer */
83 /** time of the last successful read from the receiver */
85 /** time the last write to the write fd happend */
87 /** writer start time */
88 struct timeval wstime
;
89 /** did we include \a write_fd in the fdset */
91 /** set to one if we have sent the TERM signal to \a wpid */
93 /** the receiver info associated with this slot */
94 struct receiver_node
*receiver_node
;
95 /** the active filter chain */
96 struct filter_chain_info
*fci
;
99 static struct slot_info slot
[MAX_STREAM_SLOTS
];
101 /** defines one command of para_audiod */
102 struct audiod_command
{
103 /** the name of the command */
105 /** pointer to the function that handles the command */
106 int (*handler
)(int, int, char**);
107 /** one-line description of the command */
108 const char *description
;
109 /** summary of the command line options */
110 const char *synopsis
;
111 /** the long help text */
115 extern const char *status_item_list
[NUM_STAT_ITEMS
];
117 static int com_grab(int, int, char **);
118 static int com_cycle(int, int, char **);
119 static int com_help(int, int, char **);
120 static int com_off(int, int, char **);
121 static int com_on(int, int, char **);
122 static int com_sb(int, int, char **);
123 static int com_stat(int, int, char **);
124 static int com_term(int, int, char **);
125 static int stat_pipe
= -1, signal_pipe
;
127 static struct gengetopt_args_info conf
;
128 static struct timeval server_stream_start
, sa_time_diff
;
129 static int playing
, current_decoder
= -1,
130 audiod_status
= AUDIOD_ON
, offset_seconds
, length_seconds
,
131 sa_time_diff_sign
= 1, audiod_socket
= -1;
132 static char *af_status
, /* the audio format announced in server status */
133 *socket_name
, *hostname
;
134 /** how many status items to remember */
135 #define RINGBUFFER_SIZE 32
136 static void *stat_item_ringbuf
;
137 static FILE *logfile
;
138 static const struct timeval restart_delay
= {0, 300 * 1000};
140 static struct audio_format_info afi
[] = {
144 .write_cmd
= "para_play",
148 .write_cmd
= "para_play",
152 static struct audiod_command cmds
[] = {
155 .handler
= com_cycle
,
156 .description
= "switch to next mode",
160 "on -> standby -> off -> on\n"
166 .description
= "grab the audio stream",
167 .synopsis
= "-- grab [grab_options]",
169 "grab ('splice') the audio stream at any position in the filter \n"
170 "chain and send that data back to the client. \n"
171 "Available options:\n\n"
177 .description
= "display command list or help for given command",
178 .synopsis
= "help [command]",
181 "When I was younger, so much younger than today, I never needed\n"
182 "anybody's help in any way. But now these days are gone, I'm not so\n"
183 "self assured. Now I find I've changed my mind and opened up the doors.\n"
185 " -- Beatles: Help\n"
191 .description
= "deactivate para_audiod",
195 "Close connection to para_server and stop all decoders.\n"
201 .description
= "activate para_audiod",
205 "Establish connection to para_server, retrieve para_server's current\n"
206 "status. If playing, start corresponding decoder. Otherwise stop\n"
213 .description
= "enter standby mode",
217 "Stop all decoders but leave connection to para_server open.\n"
223 .description
= "print status information",
227 "Add para_audiod status information to para_server's status information\n"
228 "and dump everything to stdout.\n"
234 .description
= "terminate audiod",
238 "Stop all decoders, shut down connection to para_server and exit.\n"
246 /** iterate over all slots */
247 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
248 /** iterate over all supported audio formats */
249 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
250 /** iterate over the array of all audiod commands */
251 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
254 * get the audio format number
255 * \param name the name of the audio format
257 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
258 * \a name is not a supported audio format.
260 int get_audio_format_num(char *name
)
263 FOR_EACH_AUDIO_FORMAT(i
)
264 if (!strcmp(name
, audio_formats
[i
]))
266 return -E_UNSUPPORTED_AUDIO_FORMAT
;
270 * log function. first argument is loglevel.
272 void para_log(int ll
, char* fmt
,...)
278 char str
[MAXLINE
] = "";
280 if (ll
< conf
.loglevel_arg
)
282 if (!logfile
&& conf
.logfile_given
)
283 logfile
= open_log(conf
.logfile_arg
);
284 if (!logfile
&& conf
.daemon_given
)
295 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
296 fprintf(outfd
, "%s %s ", str
, hostname
);
297 if (conf
.loglevel_arg
<= INFO
)
298 fprintf(outfd
, "%i ", ll
);
300 vfprintf(outfd
, fmt
, argp
);
304 static int client_write(int fd
, const char *buf
)
306 size_t len
= strlen(buf
);
307 return write(fd
, buf
, len
) != len
? -E_CLIENT_WRITE
: 1;
310 static char *get_time_string(struct timeval
*newest_stime
)
312 struct timeval now
, diff
, adj_stream_start
, tmp
;
313 int total
= 0, use_server_time
= 1;
316 return make_message("%s:", length_seconds
?
317 "" : status_item_list
[SI_PLAY_TIME
]);
318 if (audiod_status
== AUDIOD_OFF
)
320 if (sa_time_diff_sign
> 0)
321 tv_diff(&server_stream_start
, &sa_time_diff
,
324 tv_add(&server_stream_start
, &sa_time_diff
,
326 tmp
= adj_stream_start
;
327 if (newest_stime
&& audiod_status
== AUDIOD_ON
) {
328 tv_diff(newest_stime
, &adj_stream_start
, &diff
);
329 if (tv2ms(&diff
) < 5000) {
334 gettimeofday(&now
, NULL
);
335 tv_diff(&now
, &tmp
, &diff
);
336 total
= diff
.tv_sec
+ offset_seconds
;
337 if (total
> length_seconds
)
338 total
= length_seconds
;
343 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
344 status_item_list
[SI_PLAY_TIME
],
345 use_server_time
? "~" : "",
348 (length_seconds
- total
) / 60,
349 (length_seconds
- total
) % 60,
350 length_seconds
? (total
* 100 + length_seconds
/ 2) /
357 static char *audiod_status_string(void)
360 struct timeval
*newest_stime
= NULL
;
361 char *ret
, *time_string
, *uptime_string
, *decoder_flags
=
362 para_malloc((MAX_STREAM_SLOTS
+ 1) * sizeof(char));
365 struct slot_info
*s
= &slot
[i
];
367 if (s
->receiver_node
)
372 flag
+= s
->format
* 4;
373 decoder_flags
[i
] = flag
;
376 if (newest_stime
&& tv_diff(&s
->wstime
, newest_stime
, NULL
) <= 0)
378 newest_stime
= &s
->wstime
;
380 decoder_flags
[MAX_STREAM_SLOTS
] = '\0';
381 time_string
= get_time_string(newest_stime
);
382 uptime_string
= uptime_str();
383 ret
= make_message("%s:%s\n%s:%s\n%s:%s\n%s",
384 status_item_list
[SI_AUDIOD_UPTIME
], uptime_string
,
385 status_item_list
[SI_DECODER_FLAGS
], decoder_flags
,
386 status_item_list
[SI_AUDIOD_STATUS
], audiod_status
== AUDIOD_ON
?
387 "on" : (audiod_status
== AUDIOD_OFF
? "off": "sb"),
395 static char *configfile_exists(void)
397 static char *config_file
;
400 char *home
= para_homedir();
401 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
404 return file_exists(config_file
)? config_file
: NULL
;
407 static void setup_signal_handling(void)
409 signal_pipe
= para_signal_init();
410 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe
);
411 para_install_sighandler(SIGINT
);
412 para_install_sighandler(SIGTERM
);
413 para_install_sighandler(SIGCHLD
);
414 para_install_sighandler(SIGHUP
);
415 signal(SIGPIPE
, SIG_IGN
);
418 static void audiod_status_dump(void)
420 static char *prev_status
;
421 char *tmp
= audiod_status_string();
423 if (!prev_status
|| strcmp(tmp
, prev_status
))
424 stat_client_write(tmp
);
429 static void clear_slot(int slot_num
)
431 struct slot_info
*s
= &slot
[slot_num
];
433 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
434 memset(s
, 0, sizeof(struct slot_info
));
438 static void kill_stream_writer(int slot_num
)
440 struct slot_info
*s
= &slot
[slot_num
];
442 if (s
->format
< 0 || s
->wkilled
|| s
->wpid
<= 0)
444 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
445 s
->wpid
, audio_formats
[s
->format
], slot_num
);
446 kill(s
->wpid
, SIGTERM
);
451 static void set_restart_barrier(int format
, struct timeval
*now
)
458 gettimeofday(&tmp
, NULL
);
459 tv_add(&tmp
, &restart_delay
, &afi
[format
].restart_barrier
);
462 static void close_receiver(int slot_num
)
464 struct slot_info
*s
= &slot
[slot_num
];
465 struct audio_format_info
*a
;
468 if (s
->format
< 0 || !s
->receiver_node
)
471 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
472 audio_formats
[s
->format
] , slot_num
);
473 a
->receiver
->close(s
->receiver_node
);
474 free(s
->receiver_node
);
475 s
->receiver_node
= NULL
;
476 set_restart_barrier(s
->format
, NULL
);
479 static void kill_all_decoders(void)
484 if (slot
[i
].format
>= 0) {
485 PARA_INFO_LOG("stopping decoder in slot %d\n", i
);
486 kill_stream_writer(i
);
490 static void check_sigchld(void)
495 gettimeofday(&now
, NULL
);
498 pid
= para_reap_child();
502 struct slot_info
*s
= &slot
[i
];
506 if (pid
== s
->wpid
) {
508 lifetime
= now
.tv_sec
- s
->wstime
.tv_sec
;
509 PARA_INFO_LOG("%s stream writer in slot %d died "
511 audio_formats
[s
->format
], i
, lifetime
);
512 set_restart_barrier(s
->format
, &now
);
513 goto reap_next_child
;
516 PARA_CRIT_LOG("para_client died (pid %d)\n", pid
);
517 goto reap_next_child
;
520 static int get_empty_slot(void)
531 if (s
->write_fd
> 0 || s
->wpid
> 0)
533 if (s
->receiver_node
)
540 return -E_NO_MORE_SLOTS
;
543 static int decoder_running(int format
)
550 if (s
->format
== format
&& s
->receiver_node
)
552 if (s
->format
== format
&& s
->wpid
> 0)
558 static void close_stat_pipe(void)
565 PARA_NOTICE_LOG("%s", "closing status pipe\n");
567 del_close_on_fork_list(stat_pipe
);
570 for (i
= 0; i
< RINGBUFFER_SIZE
; i
++)
571 free(ringbuffer_add(stat_item_ringbuf
, para_strdup(NULL
)));
575 audiod_status_dump();
577 msg
= make_message("%s:no connection to para_server\n",
578 status_item_list
[SI_STATUS_BAR
]);
579 free(ringbuffer_add(stat_item_ringbuf
, msg
));
580 stat_client_write(msg
);
583 static void __noreturn
clean_exit(int status
, const char *msg
)
585 PARA_EMERG_LOG("%s\n", msg
);
594 static char *glob_cmd(char *cmd
)
596 char *ret
, *replacement
;
597 struct timeval tmp
, delay
, rss
; /* real stream start */
599 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
600 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
601 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
602 if (sa_time_diff_sign
< 0)
603 tv_add(&server_stream_start
, &sa_time_diff
, &rss
);
605 tv_diff(&server_stream_start
, &sa_time_diff
, &rss
);
606 tv_add(&rss
, &delay
, &tmp
);
607 replacement
= make_message("%lu:%lu", tmp
.tv_sec
, tmp
.tv_usec
);
608 ret
= s_a_r(cmd
, "STREAM_START", replacement
);
612 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd
, ret
);
615 gettimeofday(&now
, NULL
);
616 PARA_INFO_LOG("now: %lu:%lu\n", now
.tv_sec
, now
.tv_usec
);
622 /** get the number of filters for the given audio format */
623 int num_filters(int audio_format_num
)
625 return afi
[audio_format_num
].num_filters
;
628 static void open_filters(int slot_num
)
630 struct slot_info
*s
= &slot
[slot_num
];
631 struct audio_format_info
*a
= &afi
[s
->format
];
632 int nf
= a
->num_filters
;
635 s
->fci
= para_calloc(sizeof(struct filter_chain_info
));
636 INIT_LIST_HEAD(&s
->fci
->filters
);
639 s
->fci
->inbuf
= s
->receiver_node
->buf
;
640 s
->fci
->in_loaded
= &s
->receiver_node
->loaded
;
641 s
->fci
->outbuf
= s
->receiver_node
->buf
;
642 s
->fci
->out_loaded
= &s
->receiver_node
->loaded
;
643 s
->fci
->eof
= &s
->receiver_node
->eof
;
644 for (i
= 0; i
< nf
; i
++) {
645 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
646 fn
->conf
= a
->filter_conf
[i
];
648 fn
->filter
= a
->filters
[i
];
649 INIT_LIST_HEAD(&fn
->callbacks
);
650 list_add_tail(&fn
->node
, &s
->fci
->filters
);
651 fn
->filter
->open(fn
);
652 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
653 audio_formats
[s
->format
], i
+ 1, nf
,
654 fn
->filter
->name
, slot_num
);
655 s
->fci
->outbuf
= fn
->buf
;
656 s
->fci
->out_loaded
= &fn
->loaded
;
658 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s
->fci
,
662 static struct filter_node
*find_filter_node(int slot_num
, int format
, int filternum
)
664 struct filter_node
*fn
;
668 struct slot_info
*s
= &slot
[i
];
669 if (s
->format
< 0 || !s
->fci
)
671 if (slot_num
>= 0 && slot_num
!= i
)
673 if (format
>= 0 && s
->format
!= format
)
675 if (num_filters(i
) < filternum
)
679 list_for_each_entry(fn
, &s
->fci
->filters
, node
)
680 if (filternum
<= 0 || j
++ == filternum
)
687 static void start_stream_writer(int slot_num
)
689 int ret
, fds
[3] = {1, -1, -1};
690 struct slot_info
*s
= &slot
[slot_num
];
691 struct audio_format_info
*a
= &afi
[s
->format
];
692 char *glob
= glob_cmd(a
->write_cmd
);
694 PARA_INFO_LOG("starting stream writer: %s\n", glob
? glob
: a
->write_cmd
);
695 open_filters(slot_num
);
697 ret
= para_exec_cmdline_pid(&s
->wpid
, glob
? glob
: a
->write_cmd
, fds
);
700 PARA_ERROR_LOG("exec failed (%d)\n", ret
);
703 s
->write_fd
= fds
[0];
704 add_close_on_fork_list(s
->write_fd
);
705 /* we write to this fd in do_select, so we need non-blocking */
706 fcntl(s
->write_fd
, F_SETFL
, O_NONBLOCK
);
707 gettimeofday(&s
->wstime
, NULL
);
708 current_decoder
= slot_num
;
709 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fci
->filters
);
712 static void open_receiver(int format
)
714 struct audio_format_info
*a
= &afi
[format
];
718 slot_num
= get_empty_slot();
720 clean_exit(EXIT_FAILURE
, PARA_STRERROR(-slot_num
));
723 gettimeofday(&s
->rtime
, NULL
);
725 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
726 s
->receiver_node
->conf
= a
->receiver_conf
;
727 ret
= a
->receiver
->open(s
->receiver_node
);
729 PARA_ERROR_LOG("failed to open receiver (%s)\n",
730 PARA_STRERROR(-ret
));
731 free(s
->receiver_node
);
732 s
->receiver_node
= NULL
;
735 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
736 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
739 static int is_frozen(int format
)
742 struct audio_format_info
*a
= &afi
[format
];
744 gettimeofday(&now
, NULL
);
745 return (tv_diff(&now
, &a
->restart_barrier
, NULL
) > 0)? 0 : 1;
748 static void start_current_receiver(void)
754 i
= get_audio_format_num(af_status
);
757 if ((decoder_running(i
) & 1) || is_frozen(i
))
762 static void compute_time_diff(const struct timeval
*status_time
)
764 struct timeval now
, tmp
, diff
;
767 const struct timeval max_deviation
= {0, 500 * 1000};
768 const int time_smooth
= 5;
770 gettimeofday(&now
, NULL
);
771 sign
= tv_diff(status_time
, &now
, &diff
);
772 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
773 // sign, sa_time_diff_sign);
775 sa_time_diff_sign
= sign
;
781 int s
= tv_diff(&diff
, &sa_time_diff
, &tmp
);
782 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
783 PARA_WARNING_LOG("time diff jump: %lims\n",
787 sa_time_diff_sign
= tv_convex_combination(
788 sa_time_diff_sign
* time_smooth
, &sa_time_diff
,
789 count
> 10? sign
: sign
* time_smooth
, &diff
,
792 PARA_INFO_LOG("time diff (cur/avg): "
794 sign
* diff
.tv_sec
, (diff
.tv_usec
+ 500) / 1000,
795 sa_time_diff_sign
* sa_time_diff
.tv_sec
,
796 (sa_time_diff
.tv_usec
+ 500)/ 1000);
799 static void check_stat_line(char *line
)
807 free(ringbuffer_add(stat_item_ringbuf
, para_strdup(line
)));
808 stat_client_write(line
);
809 itemnum
= stat_line_valid(line
);
812 ilen
= strlen(status_item_list
[itemnum
]);
815 playing
= strstr(line
, "playing")? 1 : 0;
819 af_status
= para_strdup(line
+ ilen
+ 1);
822 offset_seconds
= atoi(line
+ ilen
+ 1);
825 length_seconds
= atoi(line
+ ilen
+ 1);
827 case SI_STREAM_START
:
828 if (sscanf(line
+ ilen
+ 1, "%lu.%lu",
829 &tv
.tv_sec
, &tv
.tv_usec
) == 2)
830 server_stream_start
= tv
;
832 case SI_CURRENT_TIME
:
833 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &tv
.tv_sec
,
835 compute_time_diff(&tv
);
840 static void handle_signal(int sig
)
844 return check_sigchld();
848 PARA_EMERG_LOG("terminating on signal %d\n", sig
);
849 clean_exit(EXIT_FAILURE
, "caught deadly signal");
854 static void check_timeouts(void)
857 int slot_num
, timeout
= conf
.stream_timeout_arg
;
859 gettimeofday(&now
, NULL
);
860 FOR_EACH_SLOT(slot_num
) {
861 struct slot_info
*s
= &slot
[slot_num
];
864 /* check read time */
865 if (s
->receiver_node
&&
866 now
.tv_sec
> s
->rtime
.tv_sec
+ timeout
) {
867 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
868 audio_formats
[s
->format
], slot_num
);
872 close_receiver(slot_num
);
874 /* check write time */
875 if (s
->wpid
> 0 && !s
->wkilled
&&
876 now
.tv_sec
> s
->wtime
.tv_sec
+ timeout
) {
877 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
878 audio_formats
[s
->format
], slot_num
);
885 static size_t get_loaded_bytes(int slot_num
)
888 struct slot_info
*s
= &slot
[slot_num
];
889 struct receiver_node
*rn
= s
->receiver_node
;
894 if (afi
[s
->format
].num_filters
) {
896 loaded
= *s
->fci
->out_loaded
;
906 static void close_decoder_if_idle(int slot_num
)
908 struct slot_info
*s
= &slot
[slot_num
];
909 struct receiver_node
*rn
= s
->receiver_node
;
915 if (!rn
->eof
&& !s
->fci
->error
&& s
->wpid
> 0)
917 if (!s
->fci
->error
&& s
->wpid
> 0) { /* eof */
918 if (filter_io(s
->fci
) > 0)
920 if (get_loaded_bytes(slot_num
))
923 if (s
->write_fd
> 0) {
924 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num
,
927 del_close_on_fork_list(s
->write_fd
);
931 return; /* wait until writer dies before closing filters */
932 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
934 close_filters(s
->fci
);
936 close_receiver(slot_num
);
937 clear_slot(slot_num
);
940 static int set_stream_fds(fd_set
*wfds
)
942 int i
, max_fileno
= -1;
946 struct slot_info
*s
= &slot
[i
];
947 struct audio_format_info
*a
;
948 struct receiver_node
*rn
;
950 close_decoder_if_idle(i
);
955 rn
= s
->receiver_node
;
956 if (rn
&& rn
->loaded
&& !s
->wpid
) {
957 PARA_INFO_LOG("no writer in slot %d\n", i
);
958 start_stream_writer(i
);
960 if (s
->write_fd
<= 0)
962 if (!get_loaded_bytes(i
))
964 FD_SET(s
->write_fd
, wfds
);
966 max_fileno
= MAX(s
->write_fd
, max_fileno
);
968 // PARA_INFO_LOG("return %d\n", max_fileno);
972 static int write_audio_data(int slot_num
)
974 struct slot_info
*s
= &slot
[slot_num
];
975 struct audio_format_info
*a
= &afi
[s
->format
];
976 struct receiver_node
*rn
= s
->receiver_node
;
981 if (a
->num_filters
) {
982 buf
= &s
->fci
->outbuf
;
983 len
= s
->fci
->out_loaded
;
988 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf
, *len
);
989 rv
= write(s
->write_fd
, *buf
, *len
);
990 PARA_DEBUG_LOG("wrote %d/%zd\n", rv
, *len
);
992 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
993 slot_num
, s
->write_fd
, strerror(errno
));
995 s
->fci
->error
= E_WRITE_AUDIO_DATA
;
996 } else if (rv
!= *len
) {
997 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
998 audio_formats
[s
->format
], rv
, *len
, slot_num
);
1000 memmove(*buf
, *buf
+ rv
, *len
);
1004 gettimeofday(&s
->wtime
, NULL
);
1008 static void slot_io(fd_set
*wfds
)
1013 struct slot_info
*s
= &slot
[i
];
1014 struct receiver_node
*rn
= s
->receiver_node
;
1016 if (rn
&& rn
->loaded
)
1017 gettimeofday(&s
->rtime
, NULL
);
1018 if (s
->format
>= 0 && s
->write_fd
> 0 && s
->fci
) {
1019 ret
= filter_io(s
->fci
);
1021 s
->fci
->error
= -ret
;
1022 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1023 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1025 if (s
->write_fd
<= 0 || !s
->wcheck
|| !FD_ISSET(s
->write_fd
, wfds
))
1027 write_audio_data(i
);
1031 static int parse_stream_command(const char *txt
, char **cmd
)
1033 char *p
= strchr(txt
, ':');
1037 return -E_MISSING_COLON
;
1039 FOR_EACH_AUDIO_FORMAT(i
) {
1040 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
1045 return -E_UNSUPPORTED_AUDIO_FORMAT
;
1048 static int add_filter(int format
, char *cmdline
)
1050 struct audio_format_info
*a
= &afi
[format
];
1051 int filter_num
, nf
= a
->num_filters
;
1053 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
1056 a
->filters
[nf
] = &filters
[filter_num
];
1058 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
1059 a
->filters
[nf
]->name
);
1063 static int setup_default_filters(void)
1067 FOR_EACH_AUDIO_FORMAT(i
) {
1068 struct audio_format_info
*a
= &afi
[i
];
1073 /* add "dec" to audio format name */
1074 tmp
= make_message("%sdec", audio_formats
[i
]);
1075 for (j
= 0; filters
[j
].name
; j
++)
1076 if (!strcmp(tmp
, filters
[j
].name
))
1079 ret
= -E_UNSUPPORTED_FILTER
;
1080 if (!filters
[j
].name
)
1082 tmp
= para_strdup(filters
[j
].name
);
1083 ret
= add_filter(i
, tmp
);
1087 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
], filters
[j
].name
);
1088 ret
= add_filter(i
, "wav");
1091 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats
[i
]);
1097 static int init_stream_io(void)
1099 int i
, ret
, receiver_num
;
1102 for (i
= 0; i
< conf
.stream_write_cmd_given
; i
++) {
1103 ret
= parse_stream_command(conf
.stream_write_cmd_arg
[i
], &cmd
);
1106 afi
[ret
].write_cmd
= para_strdup(cmd
);
1107 PARA_INFO_LOG("%s write command: %s\n", audio_formats
[ret
], afi
[ret
].write_cmd
);
1109 for (i
= 0; receivers
[i
].name
; i
++) {
1110 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
1111 receivers
[i
].init(&receivers
[i
]);
1113 for (i
= 0; i
< conf
.receiver_given
; i
++) {
1114 char *arg
= conf
.receiver_arg
[i
];
1115 char *recv
= strchr(arg
, ':');
1116 ret
= -E_MISSING_COLON
;
1121 ret
= get_audio_format_num(arg
);
1124 afi
[ret
].receiver_conf
= check_receiver_arg(recv
, &receiver_num
);
1125 if (!afi
[ret
].receiver_conf
) {
1126 ret
= -E_RECV_SYNTAX
;
1129 afi
[ret
].receiver
= &receivers
[receiver_num
];
1131 /* use the first available receiver with no arguments
1132 * for those audio formats for which no receiver
1135 cmd
= para_strdup(receivers
[0].name
);
1136 FOR_EACH_AUDIO_FORMAT(i
) {
1137 struct audio_format_info
*a
= &afi
[i
];
1138 if (a
->receiver_conf
)
1140 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
1141 if (!a
->receiver_conf
)
1142 return -E_RECV_SYNTAX
;
1143 a
->receiver
= &receivers
[receiver_num
];
1147 filter_init(filters
);
1148 FOR_EACH_AUDIO_FORMAT(i
) {
1149 afi
[i
].filter_conf
= para_malloc((conf
.filter_given
+ 1) * sizeof(char *));
1150 afi
[i
].filters
= para_malloc((conf
.filter_given
+ 1) * sizeof(struct filter
*));
1152 if (!conf
.no_default_filters_given
)
1153 return setup_default_filters();
1154 for (i
= 0; i
< conf
.filter_given
; i
++) {
1155 char *arg
= conf
.filter_arg
[i
];
1156 char *filter_name
= strchr(arg
, ':');
1157 ret
= -E_MISSING_COLON
;
1160 *filter_name
= '\0';
1162 ret
= get_audio_format_num(arg
);
1165 ret
= add_filter(ret
, filter_name
);
1174 static int dump_commands(int fd
)
1176 char *buf
= para_strdup(""), *tmp
= NULL
;
1180 FOR_EACH_COMMAND(i
) {
1181 tmp
= make_message("%s%s\t%s\n", buf
, cmds
[i
].name
,
1182 cmds
[i
].description
);
1186 ret
= client_write(fd
, buf
);
1192 * command handlers don't close their fd on errors (ret < 0) so that
1193 * its caller can send an error message. Otherwise (ret >= 0) it's up
1194 * to each individual command to close the fd if necessary.
1197 static int com_help(int fd
, int argc
, char **argv
)
1201 const char *dflt
= "No such command. Available commands:\n";
1204 ret
= dump_commands(fd
);
1207 FOR_EACH_COMMAND(i
) {
1208 if (strcmp(cmds
[i
].name
, argv
[1]))
1211 "NAME\n\t%s -- %s\n"
1212 "SYNOPSIS\n\tpara_audioc %s\n"
1213 "DESCRIPTION\n%s\n",
1215 cmds
[i
].description
,
1219 ret
= client_write(fd
, buf
);
1223 ret
= client_write(fd
, dflt
);
1225 ret
= dump_commands(fd
);
1232 static int com_stat(int fd
, __unused
int argc
, __unused
char **argv
)
1235 char *buf
= audiod_status_string();
1237 buf
= para_strcat(buf
, "\n");
1238 for (i
= RINGBUFFER_SIZE
- 1; i
>= 0; i
--) {
1239 char *tmp
, *line
= ringbuffer_get(stat_item_ringbuf
, i
);
1242 tmp
= make_message("%s\n", line
);
1243 buf
= para_strcat(buf
, tmp
);
1246 ret
= client_write(fd
, buf
);
1248 ret
= stat_client_add(fd
);
1254 static char *list_filters(void)
1257 char *tmp
, *msg
= make_message("format\tnum\tcmd\n");
1259 FOR_EACH_AUDIO_FORMAT(i
) {
1260 for (j
= 0; j
< afi
[i
].num_filters
; j
++) {
1261 tmp
= make_message("%s\t%i\t%s\n",
1262 afi
[i
].name
, j
, afi
[i
].filter_cmds
[j
]);
1263 msg
= para_strcat(msg
, tmp
);
1266 tmp
= make_message("%s\t%i\t%s\n", afi
[i
].name
,
1267 j
, afi
[i
].write_cmd
);
1268 msg
= para_strcat(msg
, tmp
);
1275 static int com_grab(int fd
, int argc
, char **argv
)
1277 struct grab_client
*gc
;
1278 struct filter_node
*fn
;
1281 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1282 gc
= grab_client_new(fd
, argc
, argv
, &err
);
1283 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1286 fn
= find_filter_node(gc
->conf
->slot_arg
, gc
->audio_format_num
, gc
->conf
->filter_num_arg
);
1288 activate_grab_client(gc
, fn
);
1291 if (err
!= -E_GC_HELP_GIVEN
)
1293 err
= client_write(fd
, "Usage: para_audioc [audioc_options] -- "
1294 "grab [grab_options]\nAvailable options:\n");
1297 err
= client_write(fd
, GRAB_HELP_TXT
);
1304 static int __noreturn
com_term(int fd
, __unused
int argc
, __unused
char **argv
)
1307 clean_exit(EXIT_SUCCESS
, "terminating on user request");
1310 static int com_on(int fd
, __unused
int argc
, __unused
char **argv
)
1312 audiod_status
= AUDIOD_ON
;
1317 static int com_off(int fd
, __unused
int argc
, __unused
char **argv
)
1319 audiod_status
= AUDIOD_OFF
;
1324 static int com_sb(int fd
, __unused
int argc
, __unused
char **argv
)
1326 audiod_status
= AUDIOD_STANDBY
;
1331 static int com_cycle(int fd
, int argc
, char **argv
)
1333 switch (audiod_status
) {
1335 return com_sb(fd
, argc
, argv
);
1338 return com_on(fd
, argc
, argv
);
1340 case AUDIOD_STANDBY
:
1341 return com_off(fd
, argc
, argv
);
1348 static int check_perms(struct ucred
*c
)
1352 if (!conf
.user_allow_given
)
1354 for (i
= 0; i
< conf
.user_allow_given
; i
++)
1355 if (c
->uid
== conf
.user_allow_arg
[i
])
1357 return -E_UCRED_PERM
;
1360 static int handle_connect(void)
1362 int i
, argc
, ret
, clifd
= -1;
1364 char *buf
= para_malloc(MAXLINE
), **argv
= NULL
;
1365 struct sockaddr_un unix_addr
;
1367 ret
= para_accept(audiod_socket
, &unix_addr
, sizeof(struct sockaddr_un
));
1371 ret
= recv_cred_buffer(clifd
, buf
, MAXLINE
- 1, &c
);
1374 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c
.pid
, c
.uid
, c
.gid
, ret
, buf
);
1376 ret
= check_perms(&c
);
1379 argc
= split_args(buf
, &argv
, '\n');
1380 PARA_INFO_LOG("argv[0]: %s\n", argv
[0]);
1381 for (i
= 0; cmds
[i
].name
; i
++) {
1382 if (strcmp(cmds
[i
].name
, argv
[0]))
1384 ret
= cmds
[i
].handler(clifd
, argc
+ 1, argv
);
1387 ret
= -E_INVALID_AUDIOD_CMD
; /* cmd not found */
1391 if (clifd
> 0 && ret
< 0 && ret
!= -E_CLIENT_WRITE
) {
1392 char *tmp
= make_message("%s\n", PARA_STRERROR(-ret
));
1393 client_write(clifd
, tmp
);
1400 static void audiod_get_socket(void)
1402 struct sockaddr_un unix_addr
;
1404 if (conf
.socket_given
)
1405 socket_name
= para_strdup(conf
.socket_arg
);
1407 char *hn
= para_hostname();
1408 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
1412 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name
);
1413 if (conf
.force_given
)
1414 unlink(socket_name
);
1415 audiod_socket
= create_pf_socket(socket_name
, &unix_addr
,
1416 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
1417 if (audiod_socket
< 0) {
1418 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1419 exit(EXIT_FAILURE
); /* do not unlink socket */
1421 if (listen(audiod_socket
, 5) < 0) {
1422 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1423 exit(EXIT_FAILURE
); /* do not unlink socket */
1425 add_close_on_fork_list(audiod_socket
);
1428 static int open_stat_pipe(void)
1430 int ret
, fd
[3] = {-1, 1, 0};
1431 char *argv
[] = {BINDIR
"/para_client", "stat", NULL
};
1433 ret
= para_exec(&pid
, BINDIR
"/para_client", argv
, fd
);
1436 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret
);
1437 add_close_on_fork_list(ret
);
1439 clean_exit(EXIT_FAILURE
, "failed to open status pipe");
1443 static int pre_select(fd_set
*rfds
, fd_set
*wfds
, struct timeval
*tv
)
1445 int i
, ret
, max
= -1;
1448 struct slot_info
*s
= &slot
[i
];
1449 struct audio_format_info
*a
;
1450 struct receiver_node
*rn
= s
->receiver_node
;
1451 if (s
->format
< 0 || !rn
)
1453 a
= &afi
[s
->format
];
1454 ret
= a
->receiver
->pre_select(rn
, rfds
, wfds
, tv
);
1455 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1456 max
= MAX(max
, ret
);
1461 static void audiod_post_select(int select_ret
, fd_set
*rfds
, fd_set
*wfds
)
1466 struct slot_info
*s
= &slot
[i
];
1467 struct audio_format_info
*a
;
1468 struct receiver_node
*rn
= s
->receiver_node
;
1469 if (s
->format
< 0 || !rn
|| rn
->eof
)
1471 a
= &afi
[s
->format
];
1472 ret
= a
->receiver
->post_select(rn
, select_ret
, rfds
, wfds
);
1475 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1476 a
->receiver
->name
, PARA_STRERROR(-ret
), i
);
1478 PARA_INFO_LOG("eof in slot %d\n", i
);
1481 if (ret
< 0 && s
->fci
)
1482 s
->fci
->error
= ret
;
1486 /* TODO: move everything before the select call to pre_select() */
1487 static void __noreturn
audiod_mainloop(void)
1490 int ret
, max_fileno
, sbo
= 0;
1491 char status_buf
[STRINGSIZE
] = "";
1497 if (audiod_status
!= AUDIOD_ON
)
1498 kill_all_decoders();
1500 start_current_receiver();
1501 max_fileno
= set_stream_fds(&wfds
);
1502 /* stat pipe (read) */
1503 if (stat_pipe
>= 0 && audiod_status
== AUDIOD_OFF
)
1505 if (stat_pipe
< 0 && audiod_status
!= AUDIOD_OFF
) {
1506 stat_pipe
= open_stat_pipe();
1508 status_buf
[0] = '\0';
1510 if (stat_pipe
>= 0 && audiod_status
!= AUDIOD_OFF
) {
1511 FD_SET(stat_pipe
, &rfds
);
1512 max_fileno
= MAX(max_fileno
, stat_pipe
);
1514 /* always check signal pipe */
1515 FD_SET(signal_pipe
, &rfds
);
1516 max_fileno
= MAX(max_fileno
, signal_pipe
);
1518 if (audiod_socket
< 0)
1519 audiod_get_socket(); /* doesn't return on errors */
1520 FD_SET(audiod_socket
, &rfds
);
1521 max_fileno
= MAX(max_fileno
, audiod_socket
);
1523 tv
.tv_usec
= 200 * 1000;
1524 ret
= pre_select(&rfds
, &wfds
, &tv
);
1525 max_fileno
= MAX(max_fileno
, ret
);
1526 ret
= select(max_fileno
+ 1, &rfds
, &wfds
, NULL
, &tv
);
1527 if (ret
< 0 && errno
!= EINTR
)
1528 PARA_ERROR_LOG("select returned %d (%s)\n", ret
,
1530 if (audiod_status
!= AUDIOD_OFF
)
1531 audiod_status_dump();
1534 audiod_post_select(ret
, &rfds
, &wfds
);
1535 /* read status pipe */
1536 if (stat_pipe
>=0 && FD_ISSET(stat_pipe
, &rfds
)) {
1537 ret
= read(stat_pipe
, status_buf
+ sbo
, STRINGSIZE
- 1 - sbo
);
1540 /* avoid busy loop if server is down */
1541 while (sleep(1) > 0)
1544 status_buf
[ret
+ sbo
] = '\0';
1545 sbo
= for_each_line(status_buf
, ret
+ sbo
,
1550 if (FD_ISSET(audiod_socket
, &rfds
)) {
1551 ret
= handle_connect();
1553 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
1557 if (FD_ISSET(signal_pipe
, &rfds
)) {
1558 int sig_nr
= para_next_signal();
1560 handle_signal(sig_nr
);
1565 static void set_initial_status(void)
1567 audiod_status
= AUDIOD_ON
;
1568 if (!conf
.mode_given
)
1570 if (!strcmp(conf
.mode_arg
, "sb")) {
1571 audiod_status
= AUDIOD_STANDBY
;
1574 if (!strcmp(conf
.mode_arg
, "off")) {
1575 audiod_status
= AUDIOD_OFF
;
1578 if (strcmp(conf
.mode_arg
, "on"))
1579 PARA_WARNING_LOG("%s", "invalid mode\n");
1582 int __noreturn
main(int argc
, char *argv
[])
1588 hostname
= para_hostname();
1589 cmdline_parser(argc
, argv
, &conf
);
1590 para_drop_privileges(conf
.user_arg
);
1591 cf
= configfile_exists();
1593 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0)) {
1594 fprintf(stderr
, "parse error in config file\n");
1598 log_welcome("para_audiod", conf
.loglevel_arg
);
1599 i
= init_stream_io();
1601 fprintf(stderr
, "init stream io error: %s\n",
1605 server_uptime(UPTIME_SET
);
1606 set_initial_status();
1609 stat_item_ringbuf
= ringbuffer_new(RINGBUFFER_SIZE
);
1611 setup_signal_handling();
1612 if (conf
.daemon_given
)