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",
211 .synopsis
= "stat [item1 ...]",
214 "Dump given status items (all if none given) to stdout.\n"
220 .description
= "terminate audiod",
224 "Stop all decoders, shut down connection to para_server and exit.\n"
232 /** iterate over all slots */
233 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
234 /** iterate over all supported audio formats */
235 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
236 /** iterate over the array of all audiod commands */
237 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
240 * get the audio format number
241 * \param name the name of the audio format
243 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
244 * \a name is not a supported audio format.
246 int get_audio_format_num(char *name
)
249 FOR_EACH_AUDIO_FORMAT(i
)
250 if (!strcmp(name
, audio_formats
[i
]))
252 return -E_UNSUPPORTED_AUDIO_FORMAT
;
256 * log function. first argument is loglevel.
258 void para_log(int ll
, const char* fmt
,...)
264 char str
[MAXLINE
] = "";
266 if (ll
< conf
.loglevel_arg
)
268 if (!logfile
&& conf
.logfile_given
)
269 logfile
= open_log(conf
.logfile_arg
);
270 if (!logfile
&& conf
.daemon_given
)
281 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
282 fprintf(outfd
, "%s %s ", str
, hostname
);
283 if (conf
.loglevel_arg
<= INFO
)
284 fprintf(outfd
, "%i ", ll
);
286 vfprintf(outfd
, fmt
, argp
);
290 static int client_write(int fd
, const char *buf
)
292 size_t len
= strlen(buf
);
293 return write(fd
, buf
, len
) != len
? -E_CLIENT_WRITE
: 1;
296 static char *get_time_string(struct timeval
*newest_stime
)
298 struct timeval now
, diff
, adj_stream_start
, tmp
;
299 int total
= 0, use_server_time
= 1;
304 return make_message("%s:\n", status_item_list
[SI_PLAY_TIME
]);
306 if (audiod_status
== AUDIOD_OFF
)
308 if (sa_time_diff_sign
> 0)
309 tv_diff(&server_stream_start
, &sa_time_diff
,
312 tv_add(&server_stream_start
, &sa_time_diff
,
314 tmp
= adj_stream_start
;
315 if (newest_stime
&& audiod_status
== AUDIOD_ON
) {
316 tv_diff(newest_stime
, &adj_stream_start
, &diff
);
317 if (tv2ms(&diff
) < 5000) {
322 gettimeofday(&now
, NULL
);
323 tv_diff(&now
, &tmp
, &diff
);
324 total
= diff
.tv_sec
+ offset_seconds
;
325 if (total
> length_seconds
)
326 total
= length_seconds
;
331 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
332 status_item_list
[SI_PLAY_TIME
],
333 use_server_time
? "~" : "",
336 (length_seconds
- total
) / 60,
337 (length_seconds
- total
) % 60,
338 length_seconds
? (total
* 100 + length_seconds
/ 2) /
345 __malloc
static char *audiod_status_string(void)
347 const char *status
= (audiod_status
== AUDIOD_ON
)?
348 "on" : (audiod_status
== AUDIOD_OFF
)? "off": "sb";
349 return make_message("%s:%s\n", status_item_list
[SI_AUDIOD_STATUS
], status
);
352 static struct timeval
*wstime(void)
355 struct timeval
*max
= NULL
;
357 struct slot_info
*s
= &slot
[i
];
360 if (max
&& tv_diff(&s
->wstime
, max
, NULL
) <= 0)
366 __malloc
static char *decoder_flags(void)
369 char decoder_flags
[MAX_STREAM_SLOTS
+ 1];
372 struct slot_info
*s
= &slot
[i
];
374 if (s
->receiver_node
)
379 flag
+= s
->format
* 4;
380 decoder_flags
[i
] = flag
;
382 decoder_flags
[MAX_STREAM_SLOTS
] = '\0';
383 return make_message("%s:%s\n", status_item_list
[SI_DECODER_FLAGS
],
387 static char *configfile_exists(void)
389 static char *config_file
;
392 char *home
= para_homedir();
393 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
396 return file_exists(config_file
)? config_file
: NULL
;
399 static void setup_signal_handling(void)
401 signal_pipe
= para_signal_init();
402 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe
);
403 para_install_sighandler(SIGINT
);
404 para_install_sighandler(SIGTERM
);
405 para_install_sighandler(SIGCHLD
);
406 para_install_sighandler(SIGHUP
);
407 signal(SIGPIPE
, SIG_IGN
);
410 static void audiod_status_dump(void)
412 static char *p_ts
, *p_us
, *p_as
, *p_df
;
413 struct timeval
*t
= wstime();
414 char *us
, *tmp
= get_time_string(t
);
416 if (tmp
&& (!p_ts
|| strcmp(tmp
, p_ts
)))
417 stat_client_write(tmp
, SI_PLAY_TIME
);
422 tmp
= make_message("%s:%s\n", status_item_list
[SI_AUDIOD_UPTIME
], us
);
424 if (!p_us
|| strcmp(p_us
, tmp
))
425 stat_client_write(tmp
, SI_AUDIOD_UPTIME
);
429 tmp
= audiod_status_string();
430 if (!p_as
|| strcmp(p_as
, tmp
))
431 stat_client_write(tmp
, SI_AUDIOD_STATUS
);
435 tmp
= decoder_flags();
436 if (!p_df
|| strcmp(p_df
, tmp
))
437 stat_client_write(tmp
, SI_DECODER_FLAGS
);
442 static void clear_slot(int slot_num
)
444 struct slot_info
*s
= &slot
[slot_num
];
446 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
447 memset(s
, 0, sizeof(struct slot_info
));
451 static void kill_stream_writer(int slot_num
)
453 struct slot_info
*s
= &slot
[slot_num
];
455 if (s
->format
< 0 || s
->wkilled
|| s
->wpid
<= 0)
457 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
458 s
->wpid
, audio_formats
[s
->format
], slot_num
);
459 kill(s
->wpid
, SIGTERM
);
464 static void set_restart_barrier(int format
, struct timeval
*now
)
471 gettimeofday(&tmp
, NULL
);
472 tv_add(&tmp
, &restart_delay
, &afi
[format
].restart_barrier
);
475 static void close_receiver(int slot_num
)
477 struct slot_info
*s
= &slot
[slot_num
];
478 struct audio_format_info
*a
;
480 if (s
->format
< 0 || !s
->receiver_node
)
483 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
484 audio_formats
[s
->format
] , slot_num
);
485 a
->receiver
->close(s
->receiver_node
);
486 free(s
->receiver_node
);
487 s
->receiver_node
= NULL
;
488 set_restart_barrier(s
->format
, NULL
);
491 static void kill_all_decoders(void)
496 if (slot
[i
].format
>= 0) {
497 PARA_INFO_LOG("stopping decoder in slot %d\n", i
);
498 kill_stream_writer(i
);
502 static void check_sigchld(void)
507 gettimeofday(&now
, NULL
);
510 pid
= para_reap_child();
514 struct slot_info
*s
= &slot
[i
];
518 if (pid
== s
->wpid
) {
520 lifetime
= now
.tv_sec
- s
->wstime
.tv_sec
;
521 PARA_INFO_LOG("%s stream writer in slot %d died "
523 audio_formats
[s
->format
], i
, lifetime
);
524 set_restart_barrier(s
->format
, &now
);
525 goto reap_next_child
;
528 PARA_CRIT_LOG("para_client died (pid %d)\n", pid
);
529 goto reap_next_child
;
532 static int get_empty_slot(void)
543 if (s
->write_fd
> 0 || s
->wpid
> 0)
545 if (s
->receiver_node
)
552 return -E_NO_MORE_SLOTS
;
555 static int decoder_running(int format
)
562 if (s
->format
== format
&& s
->receiver_node
)
564 if (s
->format
== format
&& s
->wpid
> 0)
570 static void close_stat_pipe(void)
576 PARA_NOTICE_LOG("%s", "closing status pipe\n");
578 del_close_on_fork_list(stat_pipe
);
581 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
582 free(stat_item_values
[i
]);
583 stat_item_values
[i
] = NULL
;
588 audiod_status_dump();
590 stat_item_values
[SI_STATUS_BAR
] = make_message("%s:no connection to para_server\n",
591 status_item_list
[SI_STATUS_BAR
]);
592 stat_client_write(stat_item_values
[SI_STATUS_BAR
], SI_STATUS_BAR
);
595 static void __noreturn
clean_exit(int status
, const char *msg
)
597 PARA_EMERG_LOG("%s\n", msg
);
606 __malloc
static char *glob_cmd(char *cmd
)
608 char *ret
, *replacement
;
609 struct timeval tmp
, delay
, rss
; /* real stream start */
611 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
612 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
613 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
614 if (sa_time_diff_sign
< 0)
615 tv_add(&server_stream_start
, &sa_time_diff
, &rss
);
617 tv_diff(&server_stream_start
, &sa_time_diff
, &rss
);
618 tv_add(&rss
, &delay
, &tmp
);
619 replacement
= make_message("%lu:%lu", tmp
.tv_sec
, tmp
.tv_usec
);
620 ret
= s_a_r(cmd
, "STREAM_START", replacement
);
624 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd
, ret
);
627 gettimeofday(&now
, NULL
);
628 PARA_INFO_LOG("now: %lu:%lu\n", now
.tv_sec
, now
.tv_usec
);
634 /** get the number of filters for the given audio format */
635 int num_filters(int audio_format_num
)
637 return afi
[audio_format_num
].num_filters
;
640 static void open_filters(int slot_num
)
642 struct slot_info
*s
= &slot
[slot_num
];
643 struct audio_format_info
*a
= &afi
[s
->format
];
644 int nf
= a
->num_filters
;
647 s
->fci
= para_calloc(sizeof(struct filter_chain_info
));
648 INIT_LIST_HEAD(&s
->fci
->filters
);
651 s
->fci
->inbuf
= s
->receiver_node
->buf
;
652 s
->fci
->in_loaded
= &s
->receiver_node
->loaded
;
653 s
->fci
->outbuf
= s
->receiver_node
->buf
;
654 s
->fci
->out_loaded
= &s
->receiver_node
->loaded
;
655 s
->fci
->eof
= &s
->receiver_node
->eof
;
656 for (i
= 0; i
< nf
; i
++) {
657 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
658 fn
->conf
= a
->filter_conf
[i
];
660 fn
->filter
= a
->filters
[i
];
661 INIT_LIST_HEAD(&fn
->callbacks
);
662 list_add_tail(&fn
->node
, &s
->fci
->filters
);
663 fn
->filter
->open(fn
);
664 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
665 audio_formats
[s
->format
], i
+ 1, nf
,
666 fn
->filter
->name
, slot_num
);
667 s
->fci
->outbuf
= fn
->buf
;
668 s
->fci
->out_loaded
= &fn
->loaded
;
670 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s
->fci
,
674 static struct filter_node
*find_filter_node(int slot_num
, int format
, int filternum
)
676 struct filter_node
*fn
;
680 struct slot_info
*s
= &slot
[i
];
681 if (s
->format
< 0 || !s
->fci
)
683 if (slot_num
>= 0 && slot_num
!= i
)
685 if (format
>= 0 && s
->format
!= format
)
687 if (num_filters(i
) < filternum
)
691 list_for_each_entry(fn
, &s
->fci
->filters
, node
)
692 if (filternum
<= 0 || j
++ == filternum
)
699 static void start_stream_writer(int slot_num
)
701 int ret
, fds
[3] = {1, -1, -1};
702 struct slot_info
*s
= &slot
[slot_num
];
703 struct audio_format_info
*a
= &afi
[s
->format
];
707 glob
= glob_cmd(a
->write_cmd
);
709 glob
= para_strdup("para_play");
710 PARA_INFO_LOG("starting stream writer: %s\n", glob
);
711 open_filters(slot_num
);
712 ret
= para_exec_cmdline_pid(&s
->wpid
, glob
, fds
);
715 PARA_ERROR_LOG("exec failed (%d)\n", ret
);
718 s
->write_fd
= fds
[0];
719 add_close_on_fork_list(s
->write_fd
);
720 /* we write to this fd in do_select, so we need non-blocking */
721 fcntl(s
->write_fd
, F_SETFL
, O_NONBLOCK
);
722 gettimeofday(&s
->wstime
, NULL
);
723 current_decoder
= slot_num
;
724 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fci
->filters
);
727 static void open_receiver(int format
)
729 struct audio_format_info
*a
= &afi
[format
];
733 slot_num
= get_empty_slot();
735 clean_exit(EXIT_FAILURE
, PARA_STRERROR(-slot_num
));
738 gettimeofday(&s
->rtime
, NULL
);
740 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
741 s
->receiver_node
->conf
= a
->receiver_conf
;
742 ret
= a
->receiver
->open(s
->receiver_node
);
744 PARA_ERROR_LOG("failed to open receiver (%s)\n",
745 PARA_STRERROR(-ret
));
746 free(s
->receiver_node
);
747 s
->receiver_node
= NULL
;
750 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
751 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
754 static int is_frozen(int format
)
757 struct audio_format_info
*a
= &afi
[format
];
759 gettimeofday(&now
, NULL
);
760 return (tv_diff(&now
, &a
->restart_barrier
, NULL
) > 0)? 0 : 1;
763 static void start_current_receiver(void)
769 i
= get_audio_format_num(af_status
);
772 if ((decoder_running(i
) & 1) || is_frozen(i
))
777 static void compute_time_diff(const struct timeval
*status_time
)
779 struct timeval now
, tmp
, diff
;
782 const struct timeval max_deviation
= {0, 500 * 1000};
783 const int time_smooth
= 5;
785 gettimeofday(&now
, NULL
);
786 sign
= tv_diff(status_time
, &now
, &diff
);
787 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
788 // sign, sa_time_diff_sign);
790 sa_time_diff_sign
= sign
;
796 int s
= tv_diff(&diff
, &sa_time_diff
, &tmp
);
797 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
798 PARA_WARNING_LOG("time diff jump: %lims\n",
802 sa_time_diff_sign
= tv_convex_combination(
803 sa_time_diff_sign
* time_smooth
, &sa_time_diff
,
804 count
> 10? sign
: sign
* time_smooth
, &diff
,
807 PARA_INFO_LOG("time diff (cur/avg): "
809 sign
* diff
.tv_sec
, (diff
.tv_usec
+ 500) / 1000,
810 sa_time_diff_sign
* sa_time_diff
.tv_sec
,
811 (sa_time_diff
.tv_usec
+ 500)/ 1000);
814 static void check_stat_line(char *line
)
823 itemnum
= stat_line_valid(line
);
825 PARA_WARNING_LOG("invalid status line: %s\n", line
);
828 tmp
= make_message("%s\n", line
);
829 stat_client_write(tmp
, itemnum
);
831 free(stat_item_values
[itemnum
]);
832 stat_item_values
[itemnum
] = para_strdup(line
);
833 ilen
= strlen(status_item_list
[itemnum
]);
836 playing
= strstr(line
, "playing")? 1 : 0;
840 af_status
= para_strdup(line
+ ilen
+ 1);
843 offset_seconds
= atoi(line
+ ilen
+ 1);
846 length_seconds
= atoi(line
+ ilen
+ 1);
848 case SI_STREAM_START
:
849 if (sscanf(line
+ ilen
+ 1, "%lu.%lu",
850 &tv
.tv_sec
, &tv
.tv_usec
) == 2)
851 server_stream_start
= tv
;
853 case SI_CURRENT_TIME
:
854 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &tv
.tv_sec
,
856 compute_time_diff(&tv
);
861 static void handle_signal(int sig
)
865 return check_sigchld();
869 PARA_EMERG_LOG("terminating on signal %d\n", sig
);
870 clean_exit(EXIT_FAILURE
, "caught deadly signal");
875 static void check_timeouts(void)
878 int slot_num
, timeout
= conf
.stream_timeout_arg
;
880 gettimeofday(&now
, NULL
);
881 FOR_EACH_SLOT(slot_num
) {
882 struct slot_info
*s
= &slot
[slot_num
];
885 /* check read time */
886 if (s
->receiver_node
&&
887 now
.tv_sec
> s
->rtime
.tv_sec
+ timeout
) {
888 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
889 audio_formats
[s
->format
], slot_num
);
893 close_receiver(slot_num
);
895 /* check write time */
896 if (s
->wpid
> 0 && !s
->wkilled
&&
897 now
.tv_sec
> s
->wtime
.tv_sec
+ timeout
) {
898 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
899 audio_formats
[s
->format
], slot_num
);
906 static size_t get_loaded_bytes(int slot_num
)
909 struct slot_info
*s
= &slot
[slot_num
];
910 struct receiver_node
*rn
= s
->receiver_node
;
915 if (afi
[s
->format
].num_filters
) {
917 loaded
= *s
->fci
->out_loaded
;
927 static void close_decoder_if_idle(int slot_num
)
929 struct slot_info
*s
= &slot
[slot_num
];
930 struct receiver_node
*rn
= s
->receiver_node
;
936 if (!rn
->eof
&& !s
->fci
->error
&& s
->wpid
> 0)
938 if (!s
->fci
->error
&& s
->wpid
> 0) { /* eof */
939 if (filter_io(s
->fci
) > 0)
941 if (get_loaded_bytes(slot_num
))
944 if (s
->write_fd
> 0) {
945 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num
,
948 del_close_on_fork_list(s
->write_fd
);
952 return; /* wait until writer dies before closing filters */
953 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
955 close_filters(s
->fci
);
957 close_receiver(slot_num
);
958 clear_slot(slot_num
);
961 static int set_stream_fds(fd_set
*wfds
)
963 int i
, max_fileno
= -1;
967 struct slot_info
*s
= &slot
[i
];
968 struct audio_format_info
*a
;
969 struct receiver_node
*rn
;
971 close_decoder_if_idle(i
);
976 rn
= s
->receiver_node
;
977 if (rn
&& rn
->loaded
&& !s
->wpid
) {
978 PARA_INFO_LOG("no writer in slot %d\n", i
);
979 start_stream_writer(i
);
981 if (s
->write_fd
<= 0)
983 if (!get_loaded_bytes(i
))
985 FD_SET(s
->write_fd
, wfds
);
987 max_fileno
= MAX(s
->write_fd
, max_fileno
);
989 // PARA_INFO_LOG("return %d\n", max_fileno);
993 static int write_audio_data(int slot_num
)
995 struct slot_info
*s
= &slot
[slot_num
];
996 struct audio_format_info
*a
= &afi
[s
->format
];
997 struct receiver_node
*rn
= s
->receiver_node
;
1002 if (a
->num_filters
) {
1003 buf
= &s
->fci
->outbuf
;
1004 len
= s
->fci
->out_loaded
;
1009 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf
, *len
);
1010 rv
= write(s
->write_fd
, *buf
, *len
);
1011 PARA_DEBUG_LOG("wrote %d/%zd\n", rv
, *len
);
1013 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
1014 slot_num
, s
->write_fd
, strerror(errno
));
1016 s
->fci
->error
= E_WRITE_AUDIO_DATA
;
1017 } else if (rv
!= *len
) {
1018 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
1019 audio_formats
[s
->format
], rv
, *len
, slot_num
);
1021 memmove(*buf
, *buf
+ rv
, *len
);
1025 gettimeofday(&s
->wtime
, NULL
);
1029 static void slot_io(fd_set
*wfds
)
1034 struct slot_info
*s
= &slot
[i
];
1035 struct receiver_node
*rn
= s
->receiver_node
;
1037 if (rn
&& rn
->loaded
)
1038 gettimeofday(&s
->rtime
, NULL
);
1039 if (s
->format
>= 0 && s
->write_fd
> 0 && s
->fci
) {
1040 ret
= filter_io(s
->fci
);
1042 s
->fci
->error
= -ret
;
1043 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1044 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1046 if (s
->write_fd
<= 0 || !s
->wcheck
|| !FD_ISSET(s
->write_fd
, wfds
))
1048 write_audio_data(i
);
1052 static int parse_stream_command(const char *txt
, char **cmd
)
1054 char *p
= strchr(txt
, ':');
1058 return -E_MISSING_COLON
;
1060 FOR_EACH_AUDIO_FORMAT(i
) {
1061 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
1066 return -E_UNSUPPORTED_AUDIO_FORMAT
;
1069 static int add_filter(int format
, char *cmdline
)
1071 struct audio_format_info
*a
= &afi
[format
];
1072 int filter_num
, nf
= a
->num_filters
;
1074 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
1077 a
->filters
[nf
] = &filters
[filter_num
];
1079 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
1080 a
->filters
[nf
]->name
);
1084 static int setup_default_filters(void)
1088 FOR_EACH_AUDIO_FORMAT(i
) {
1089 struct audio_format_info
*a
= &afi
[i
];
1094 /* add "dec" to audio format name */
1095 tmp
= make_message("%sdec", audio_formats
[i
]);
1096 for (j
= 0; filters
[j
].name
; j
++)
1097 if (!strcmp(tmp
, filters
[j
].name
))
1100 ret
= -E_UNSUPPORTED_FILTER
;
1101 if (!filters
[j
].name
)
1103 tmp
= para_strdup(filters
[j
].name
);
1104 ret
= add_filter(i
, tmp
);
1108 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
], filters
[j
].name
);
1109 ret
= add_filter(i
, para_strdup("wav"));
1112 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats
[i
]);
1118 static int init_stream_io(void)
1120 int i
, ret
, receiver_num
;
1123 for (i
= 0; i
< conf
.stream_write_cmd_given
; i
++) {
1124 ret
= parse_stream_command(conf
.stream_write_cmd_arg
[i
], &cmd
);
1127 afi
[ret
].write_cmd
= para_strdup(cmd
);
1128 PARA_INFO_LOG("%s write command: %s\n", audio_formats
[ret
], afi
[ret
].write_cmd
);
1130 for (i
= 0; receivers
[i
].name
; i
++) {
1131 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
1132 receivers
[i
].init(&receivers
[i
]);
1134 for (i
= 0; i
< conf
.receiver_given
; i
++) {
1135 char *arg
= conf
.receiver_arg
[i
];
1136 char *recv
= strchr(arg
, ':');
1137 ret
= -E_MISSING_COLON
;
1142 ret
= get_audio_format_num(arg
);
1145 afi
[ret
].receiver_conf
= check_receiver_arg(recv
, &receiver_num
);
1146 if (!afi
[ret
].receiver_conf
) {
1147 ret
= -E_RECV_SYNTAX
;
1150 afi
[ret
].receiver
= &receivers
[receiver_num
];
1152 /* use the first available receiver with no arguments
1153 * for those audio formats for which no receiver
1156 cmd
= para_strdup(receivers
[0].name
);
1157 FOR_EACH_AUDIO_FORMAT(i
) {
1158 struct audio_format_info
*a
= &afi
[i
];
1159 if (a
->receiver_conf
)
1161 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
1162 if (!a
->receiver_conf
)
1163 return -E_RECV_SYNTAX
;
1164 a
->receiver
= &receivers
[receiver_num
];
1168 filter_init(filters
);
1169 FOR_EACH_AUDIO_FORMAT(i
) {
1170 afi
[i
].filter_conf
= para_malloc((conf
.filter_given
+ 1) * sizeof(char *));
1171 afi
[i
].filters
= para_malloc((conf
.filter_given
+ 1) * sizeof(struct filter
*));
1173 if (!conf
.no_default_filters_given
)
1174 return setup_default_filters();
1175 for (i
= 0; i
< conf
.filter_given
; i
++) {
1176 char *arg
= conf
.filter_arg
[i
];
1177 char *filter_name
= strchr(arg
, ':');
1178 ret
= -E_MISSING_COLON
;
1181 *filter_name
= '\0';
1183 ret
= get_audio_format_num(arg
);
1186 ret
= add_filter(ret
, filter_name
);
1195 static int dump_commands(int fd
)
1197 char *buf
= para_strdup(""), *tmp
= NULL
;
1201 FOR_EACH_COMMAND(i
) {
1202 tmp
= make_message("%s%s\t%s\n", buf
, cmds
[i
].name
,
1203 cmds
[i
].description
);
1207 ret
= client_write(fd
, buf
);
1213 * command handlers don't close their fd on errors (ret < 0) so that
1214 * its caller can send an error message. Otherwise (ret >= 0) it's up
1215 * to each individual command to close the fd if necessary.
1218 static int com_help(int fd
, int argc
, char **argv
)
1222 const char *dflt
= "No such command. Available commands:\n";
1225 ret
= dump_commands(fd
);
1228 FOR_EACH_COMMAND(i
) {
1229 if (strcmp(cmds
[i
].name
, argv
[1]))
1232 "NAME\n\t%s -- %s\n"
1233 "SYNOPSIS\n\tpara_audioc %s\n"
1234 "DESCRIPTION\n%s\n",
1236 cmds
[i
].description
,
1240 ret
= client_write(fd
, buf
);
1244 ret
= client_write(fd
, dflt
);
1246 ret
= dump_commands(fd
);
1253 static int com_stat(int fd
, __unused
int argc
, __unused
char **argv
)
1257 long unsigned mask
= ~0LU;
1261 for (i
= 1; i
< argc
; i
++) {
1262 ret
= stat_item_valid(argv
[i
]);
1268 PARA_INFO_LOG("mask: 0x%lx\n", mask
);
1269 if (mask
& (1 << SI_PLAY_TIME
)) {
1270 struct timeval
*t
= wstime();
1271 char *ts
= get_time_string(t
);
1273 ret
= client_write(fd
, ts
);
1279 if (mask
& (1 << SI_AUDIOD_UPTIME
)) {
1280 char *tmp
, *us
= uptime_str();
1281 tmp
= make_message("%s:%s\n",
1282 status_item_list
[SI_AUDIOD_UPTIME
], us
);
1284 ret
= client_write(fd
, tmp
);
1289 if (mask
& (1 << SI_AUDIOD_STATUS
)) {
1290 char *s
= audiod_status_string();
1291 ret
= client_write(fd
, s
);
1296 if (mask
& (1 << SI_DECODER_FLAGS
)) {
1297 char *df
=decoder_flags();
1298 ret
= client_write(fd
, df
);
1304 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
1306 if (!((1 << i
) & mask
))
1308 v
= stat_item_values
[i
];
1309 tmp
= make_message("%s%s%s", buf
? buf
: "",
1310 v
? v
: "", v
? "\n" : "");
1314 ret
= client_write(fd
, buf
);
1317 ret
= stat_client_add(fd
, mask
);
1323 static char *list_filters(void)
1326 char *tmp
, *msg
= make_message("format\tnum\tcmd\n");
1328 FOR_EACH_AUDIO_FORMAT(i
) {
1329 for (j
= 0; j
< afi
[i
].num_filters
; j
++) {
1330 tmp
= make_message("%s\t%i\t%s\n",
1331 afi
[i
].name
, j
, afi
[i
].filter_cmds
[j
]);
1332 msg
= para_strcat(msg
, tmp
);
1335 tmp
= make_message("%s\t%i\t%s\n", afi
[i
].name
,
1336 j
, afi
[i
].write_cmd
);
1337 msg
= para_strcat(msg
, tmp
);
1344 static int com_grab(int fd
, int argc
, char **argv
)
1346 struct grab_client
*gc
;
1347 struct filter_node
*fn
;
1350 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1351 gc
= grab_client_new(fd
, argc
, argv
, &err
);
1352 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1355 fn
= find_filter_node(gc
->conf
->slot_arg
, gc
->audio_format_num
, gc
->conf
->filter_num_arg
);
1357 activate_grab_client(gc
, fn
);
1360 if (err
!= -E_GC_HELP_GIVEN
)
1362 err
= client_write(fd
, "Usage: para_audioc [audioc_options] -- "
1363 "grab [grab_options]\nAvailable options:\n");
1366 err
= client_write(fd
, GRAB_HELP_TXT
);
1373 static int __noreturn
com_term(int fd
, __unused
int argc
, __unused
char **argv
)
1376 clean_exit(EXIT_SUCCESS
, "terminating on user request");
1379 static int com_on(int fd
, __unused
int argc
, __unused
char **argv
)
1381 audiod_status
= AUDIOD_ON
;
1386 static int com_off(int fd
, __unused
int argc
, __unused
char **argv
)
1388 audiod_status
= AUDIOD_OFF
;
1393 static int com_sb(int fd
, __unused
int argc
, __unused
char **argv
)
1395 audiod_status
= AUDIOD_STANDBY
;
1400 static int com_cycle(int fd
, int argc
, char **argv
)
1402 switch (audiod_status
) {
1404 return com_sb(fd
, argc
, argv
);
1407 return com_on(fd
, argc
, argv
);
1409 case AUDIOD_STANDBY
:
1410 return com_off(fd
, argc
, argv
);
1417 static int check_perms(struct ucred
*c
)
1421 if (!conf
.user_allow_given
)
1423 for (i
= 0; i
< conf
.user_allow_given
; i
++)
1424 if (c
->uid
== conf
.user_allow_arg
[i
])
1426 return -E_UCRED_PERM
;
1429 static int handle_connect(void)
1431 int i
, argc
, ret
, clifd
= -1;
1433 char *buf
= para_malloc(MAXLINE
), **argv
= NULL
;
1434 struct sockaddr_un unix_addr
;
1436 ret
= para_accept(audiod_socket
, &unix_addr
, sizeof(struct sockaddr_un
));
1440 ret
= recv_cred_buffer(clifd
, buf
, MAXLINE
- 1, &c
);
1443 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c
.pid
, c
.uid
, c
.gid
, ret
, buf
);
1445 ret
= check_perms(&c
);
1448 argc
= split_args(buf
, &argv
, '\n');
1449 PARA_INFO_LOG("argv[0]: %s\n", argv
[0]);
1450 for (i
= 0; cmds
[i
].name
; i
++) {
1451 if (strcmp(cmds
[i
].name
, argv
[0]))
1453 ret
= cmds
[i
].handler(clifd
, argc
+ 1, argv
);
1456 ret
= -E_INVALID_AUDIOD_CMD
; /* cmd not found */
1460 if (clifd
> 0 && ret
< 0 && ret
!= -E_CLIENT_WRITE
) {
1461 char *tmp
= make_message("%s\n", PARA_STRERROR(-ret
));
1462 client_write(clifd
, tmp
);
1469 static void audiod_get_socket(void)
1471 struct sockaddr_un unix_addr
;
1473 if (conf
.socket_given
)
1474 socket_name
= para_strdup(conf
.socket_arg
);
1476 char *hn
= para_hostname();
1477 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
1481 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name
);
1482 if (conf
.force_given
)
1483 unlink(socket_name
);
1484 audiod_socket
= create_pf_socket(socket_name
, &unix_addr
,
1485 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
1486 if (audiod_socket
< 0) {
1487 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1488 exit(EXIT_FAILURE
); /* do not unlink socket */
1490 if (listen(audiod_socket
, 5) < 0) {
1491 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1492 exit(EXIT_FAILURE
); /* do not unlink socket */
1494 add_close_on_fork_list(audiod_socket
);
1497 static int open_stat_pipe(void)
1499 int ret
, fd
[3] = {-1, 1, 0};
1501 ret
= para_exec_cmdline_pid(&pid
, BINDIR
"/para_client stat", fd
);
1504 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret
);
1505 add_close_on_fork_list(ret
);
1507 clean_exit(EXIT_FAILURE
, "failed to open status pipe");
1511 static int pre_select(fd_set
*rfds
, fd_set
*wfds
, struct timeval
*tv
)
1513 int i
, ret
, max
= -1;
1516 struct slot_info
*s
= &slot
[i
];
1517 struct audio_format_info
*a
;
1518 struct receiver_node
*rn
= s
->receiver_node
;
1519 if (s
->format
< 0 || !rn
)
1521 a
= &afi
[s
->format
];
1522 ret
= a
->receiver
->pre_select(rn
, rfds
, wfds
, tv
);
1523 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1524 max
= MAX(max
, ret
);
1529 static void audiod_post_select(int select_ret
, fd_set
*rfds
, fd_set
*wfds
)
1534 struct slot_info
*s
= &slot
[i
];
1535 struct audio_format_info
*a
;
1536 struct receiver_node
*rn
= s
->receiver_node
;
1537 if (s
->format
< 0 || !rn
|| rn
->eof
)
1539 a
= &afi
[s
->format
];
1540 ret
= a
->receiver
->post_select(rn
, select_ret
, rfds
, wfds
);
1543 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1544 a
->receiver
->name
, PARA_STRERROR(-ret
), i
);
1546 PARA_INFO_LOG("eof in slot %d\n", i
);
1549 if (ret
< 0 && s
->fci
)
1550 s
->fci
->error
= ret
;
1554 /* TODO: move everything before the select call to pre_select() */
1555 static void __noreturn
audiod_mainloop(void)
1558 int ret
, max_fileno
, sbo
= 0;
1559 char status_buf
[STRINGSIZE
] = "";
1565 if (audiod_status
!= AUDIOD_ON
)
1566 kill_all_decoders();
1568 start_current_receiver();
1569 max_fileno
= set_stream_fds(&wfds
);
1570 /* stat pipe (read) */
1571 if (stat_pipe
>= 0 && audiod_status
== AUDIOD_OFF
)
1573 if (stat_pipe
< 0 && audiod_status
!= AUDIOD_OFF
) {
1574 stat_pipe
= open_stat_pipe();
1576 status_buf
[0] = '\0';
1578 if (stat_pipe
>= 0 && audiod_status
!= AUDIOD_OFF
) {
1579 FD_SET(stat_pipe
, &rfds
);
1580 max_fileno
= MAX(max_fileno
, stat_pipe
);
1582 /* always check signal pipe */
1583 FD_SET(signal_pipe
, &rfds
);
1584 max_fileno
= MAX(max_fileno
, signal_pipe
);
1586 if (audiod_socket
< 0)
1587 audiod_get_socket(); /* doesn't return on errors */
1588 FD_SET(audiod_socket
, &rfds
);
1589 max_fileno
= MAX(max_fileno
, audiod_socket
);
1591 tv
.tv_usec
= 200 * 1000;
1592 ret
= pre_select(&rfds
, &wfds
, &tv
);
1593 max_fileno
= MAX(max_fileno
, ret
);
1594 ret
= select(max_fileno
+ 1, &rfds
, &wfds
, NULL
, &tv
);
1595 if (ret
< 0 && errno
!= EINTR
)
1596 PARA_ERROR_LOG("select returned %d (%s)\n", ret
,
1598 if (audiod_status
!= AUDIOD_OFF
)
1599 audiod_status_dump();
1602 audiod_post_select(ret
, &rfds
, &wfds
);
1603 /* read status pipe */
1604 if (stat_pipe
>=0 && FD_ISSET(stat_pipe
, &rfds
)) {
1605 ret
= read(stat_pipe
, status_buf
+ sbo
, STRINGSIZE
- 1 - sbo
);
1608 /* avoid busy loop if server is down */
1609 while (sleep(1) > 0)
1612 status_buf
[ret
+ sbo
] = '\0';
1613 sbo
= for_each_line(status_buf
, ret
+ sbo
,
1618 if (FD_ISSET(audiod_socket
, &rfds
)) {
1619 ret
= handle_connect();
1621 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
1625 if (FD_ISSET(signal_pipe
, &rfds
)) {
1626 int sig_nr
= para_next_signal();
1628 handle_signal(sig_nr
);
1633 static void set_initial_status(void)
1635 audiod_status
= AUDIOD_ON
;
1636 if (!conf
.mode_given
)
1638 if (!strcmp(conf
.mode_arg
, "sb")) {
1639 audiod_status
= AUDIOD_STANDBY
;
1642 if (!strcmp(conf
.mode_arg
, "off")) {
1643 audiod_status
= AUDIOD_OFF
;
1646 if (strcmp(conf
.mode_arg
, "on"))
1647 PARA_WARNING_LOG("%s", "invalid mode\n");
1650 int __noreturn
main(int argc
, char *argv
[])
1656 hostname
= para_hostname();
1657 cmdline_parser(argc
, argv
, &conf
);
1658 para_drop_privileges(conf
.user_arg
);
1659 cf
= configfile_exists();
1661 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0)) {
1662 fprintf(stderr
, "parse error in config file\n");
1666 log_welcome("para_audiod", conf
.loglevel_arg
);
1667 i
= init_stream_io();
1669 fprintf(stderr
, "init stream io error: %s\n",
1673 server_uptime(UPTIME_SET
);
1674 set_initial_status();
1678 setup_signal_handling();
1679 if (conf
.daemon_given
)