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]",
157 "grab ('splice') the audio stream at any position in the filter \n"
158 "chain and send that data back to the client. Try\n"
159 "\t para_audioc -- grab -h\n"
160 "for the list of available options.\n"
166 .description
= "display command list or help for given command",
167 .synopsis
= "help [command]",
170 "When I was younger, so much younger than today, I never needed\n"
171 "anybody's help in any way. But now these days are gone, I'm not so\n"
172 "self assured. Now I find I've changed my mind and opened up the doors.\n"
174 " -- Beatles: Help\n"
180 .description
= "deactivate para_audiod",
184 "Close connection to para_server and stop all decoders.\n"
190 .description
= "activate para_audiod",
194 "Establish connection to para_server, retrieve para_server's current\n"
195 "status. If playing, start corresponding decoder. Otherwise stop\n"
202 .description
= "enter standby mode",
206 "Stop all decoders but leave connection to para_server open.\n"
212 .description
= "print status information",
213 .synopsis
= "stat [item1 ...]",
216 "Dump given status items (all if none given) to stdout.\n"
222 .description
= "terminate audiod",
226 "Stop all decoders, shut down connection to para_server and exit.\n"
234 /** iterate over all slots */
235 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
236 /** iterate over all supported audio formats */
237 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
238 /** iterate over the array of all audiod commands */
239 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
242 * get the audio format number
243 * \param name the name of the audio format
245 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
246 * \a name is not a supported audio format.
248 int get_audio_format_num(char *name
)
251 FOR_EACH_AUDIO_FORMAT(i
)
252 if (!strcmp(name
, audio_formats
[i
]))
254 return -E_UNSUPPORTED_AUDIO_FORMAT
;
258 * log function. first argument is loglevel.
260 void para_log(int ll
, const char* fmt
,...)
266 char str
[MAXLINE
] = "";
268 if (ll
< conf
.loglevel_arg
)
270 if (!logfile
&& conf
.logfile_given
)
271 logfile
= open_log(conf
.logfile_arg
);
272 if (!logfile
&& conf
.daemon_given
)
283 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
284 fprintf(outfd
, "%s %s ", str
, hostname
);
285 if (conf
.loglevel_arg
<= INFO
)
286 fprintf(outfd
, "%i ", ll
);
288 vfprintf(outfd
, fmt
, argp
);
292 static int client_write(int fd
, const char *buf
)
294 size_t len
= strlen(buf
);
295 return write(fd
, buf
, len
) != len
? -E_CLIENT_WRITE
: 1;
298 static char *get_time_string(struct timeval
*newest_stime
)
300 struct timeval now
, diff
, adj_stream_start
, tmp
;
301 int total
= 0, use_server_time
= 1;
306 return make_message("%s:\n", status_item_list
[SI_PLAY_TIME
]);
308 if (audiod_status
== AUDIOD_OFF
)
310 if (sa_time_diff_sign
> 0)
311 tv_diff(&server_stream_start
, &sa_time_diff
,
314 tv_add(&server_stream_start
, &sa_time_diff
,
316 tmp
= adj_stream_start
;
317 if (newest_stime
&& audiod_status
== AUDIOD_ON
) {
318 tv_diff(newest_stime
, &adj_stream_start
, &diff
);
319 if (tv2ms(&diff
) < 5000) {
324 gettimeofday(&now
, NULL
);
325 tv_diff(&now
, &tmp
, &diff
);
326 total
= diff
.tv_sec
+ offset_seconds
;
327 if (total
> length_seconds
)
328 total
= length_seconds
;
333 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
334 status_item_list
[SI_PLAY_TIME
],
335 use_server_time
? "~" : "",
338 (length_seconds
- total
) / 60,
339 (length_seconds
- total
) % 60,
340 length_seconds
? (total
* 100 + length_seconds
/ 2) /
347 __malloc
static char *audiod_status_string(void)
349 const char *status
= (audiod_status
== AUDIOD_ON
)?
350 "on" : (audiod_status
== AUDIOD_OFF
)? "off": "sb";
351 return make_message("%s:%s\n", status_item_list
[SI_AUDIOD_STATUS
], status
);
354 static struct timeval
*wstime(void)
357 struct timeval
*max
= NULL
;
359 struct slot_info
*s
= &slot
[i
];
362 if (max
&& tv_diff(&s
->wstime
, max
, NULL
) <= 0)
368 __malloc
static char *decoder_flags(void)
371 char decoder_flags
[MAX_STREAM_SLOTS
+ 1];
374 struct slot_info
*s
= &slot
[i
];
376 if (s
->receiver_node
)
381 flag
+= s
->format
* 4;
382 decoder_flags
[i
] = flag
;
384 decoder_flags
[MAX_STREAM_SLOTS
] = '\0';
385 return make_message("%s:%s\n", status_item_list
[SI_DECODER_FLAGS
],
389 static char *configfile_exists(void)
391 static char *config_file
;
394 char *home
= para_homedir();
395 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
398 return file_exists(config_file
)? config_file
: NULL
;
401 static void setup_signal_handling(void)
403 signal_pipe
= para_signal_init();
404 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe
);
405 para_install_sighandler(SIGINT
);
406 para_install_sighandler(SIGTERM
);
407 para_install_sighandler(SIGCHLD
);
408 para_install_sighandler(SIGHUP
);
409 signal(SIGPIPE
, SIG_IGN
);
412 static void audiod_status_dump(void)
414 static char *p_ts
, *p_us
, *p_as
, *p_df
;
415 struct timeval
*t
= wstime();
416 char *us
, *tmp
= get_time_string(t
);
418 if (tmp
&& (!p_ts
|| strcmp(tmp
, p_ts
)))
419 stat_client_write(tmp
, SI_PLAY_TIME
);
424 tmp
= make_message("%s:%s\n", status_item_list
[SI_AUDIOD_UPTIME
], us
);
426 if (!p_us
|| strcmp(p_us
, tmp
))
427 stat_client_write(tmp
, SI_AUDIOD_UPTIME
);
431 tmp
= audiod_status_string();
432 if (!p_as
|| strcmp(p_as
, tmp
))
433 stat_client_write(tmp
, SI_AUDIOD_STATUS
);
437 tmp
= decoder_flags();
438 if (!p_df
|| strcmp(p_df
, tmp
))
439 stat_client_write(tmp
, SI_DECODER_FLAGS
);
444 static void clear_slot(int slot_num
)
446 struct slot_info
*s
= &slot
[slot_num
];
448 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
449 memset(s
, 0, sizeof(struct slot_info
));
453 static void kill_stream_writer(int slot_num
)
455 struct slot_info
*s
= &slot
[slot_num
];
457 if (s
->format
< 0 || s
->wkilled
|| s
->wpid
<= 0)
459 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
460 s
->wpid
, audio_formats
[s
->format
], slot_num
);
461 kill(s
->wpid
, SIGTERM
);
466 static void set_restart_barrier(int format
, struct timeval
*now
)
473 gettimeofday(&tmp
, NULL
);
474 tv_add(&tmp
, &restart_delay
, &afi
[format
].restart_barrier
);
477 static void close_receiver(int slot_num
)
479 struct slot_info
*s
= &slot
[slot_num
];
480 struct audio_format_info
*a
;
482 if (s
->format
< 0 || !s
->receiver_node
)
485 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
486 audio_formats
[s
->format
] , slot_num
);
487 a
->receiver
->close(s
->receiver_node
);
488 free(s
->receiver_node
);
489 s
->receiver_node
= NULL
;
490 set_restart_barrier(s
->format
, NULL
);
493 static void kill_all_decoders(void)
498 if (slot
[i
].format
>= 0) {
499 PARA_INFO_LOG("stopping decoder in slot %d\n", i
);
500 kill_stream_writer(i
);
504 static void check_sigchld(void)
509 gettimeofday(&now
, NULL
);
512 pid
= para_reap_child();
516 struct slot_info
*s
= &slot
[i
];
520 if (pid
== s
->wpid
) {
522 lifetime
= now
.tv_sec
- s
->wstime
.tv_sec
;
523 PARA_INFO_LOG("%s stream writer in slot %d died "
525 audio_formats
[s
->format
], i
, lifetime
);
526 set_restart_barrier(s
->format
, &now
);
527 goto reap_next_child
;
530 PARA_CRIT_LOG("para_client died (pid %d)\n", pid
);
531 goto reap_next_child
;
534 static int get_empty_slot(void)
545 if (s
->write_fd
> 0 || s
->wpid
> 0)
547 if (s
->receiver_node
)
554 return -E_NO_MORE_SLOTS
;
557 static int decoder_running(int format
)
564 if (s
->format
== format
&& s
->receiver_node
)
566 if (s
->format
== format
&& s
->wpid
> 0)
572 static void close_stat_pipe(void)
578 PARA_NOTICE_LOG("%s", "closing status pipe\n");
580 del_close_on_fork_list(stat_pipe
);
583 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
584 free(stat_item_values
[i
]);
585 stat_item_values
[i
] = NULL
;
590 audiod_status_dump();
592 stat_item_values
[SI_STATUS_BAR
] = make_message("%s:no connection to para_server\n",
593 status_item_list
[SI_STATUS_BAR
]);
594 stat_client_write(stat_item_values
[SI_STATUS_BAR
], SI_STATUS_BAR
);
597 static void __noreturn
clean_exit(int status
, const char *msg
)
599 PARA_EMERG_LOG("%s\n", msg
);
608 __malloc
static char *glob_cmd(char *cmd
)
610 char *ret
, *replacement
;
611 struct timeval tmp
, delay
, rss
; /* real stream start */
613 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
614 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
615 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
616 if (sa_time_diff_sign
< 0)
617 tv_add(&server_stream_start
, &sa_time_diff
, &rss
);
619 tv_diff(&server_stream_start
, &sa_time_diff
, &rss
);
620 tv_add(&rss
, &delay
, &tmp
);
621 replacement
= make_message("%lu:%lu", tmp
.tv_sec
, tmp
.tv_usec
);
622 ret
= s_a_r(cmd
, "STREAM_START", replacement
);
626 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd
, ret
);
629 gettimeofday(&now
, NULL
);
630 PARA_INFO_LOG("now: %lu:%lu\n", now
.tv_sec
, now
.tv_usec
);
636 /** get the number of filters for the given audio format */
637 int num_filters(int audio_format_num
)
639 return afi
[audio_format_num
].num_filters
;
642 static void open_filters(int slot_num
)
644 struct slot_info
*s
= &slot
[slot_num
];
645 struct audio_format_info
*a
= &afi
[s
->format
];
646 int nf
= a
->num_filters
;
649 s
->fci
= para_calloc(sizeof(struct filter_chain_info
));
650 INIT_LIST_HEAD(&s
->fci
->filters
);
653 s
->fci
->inbuf
= s
->receiver_node
->buf
;
654 s
->fci
->in_loaded
= &s
->receiver_node
->loaded
;
655 s
->fci
->outbuf
= s
->receiver_node
->buf
;
656 s
->fci
->out_loaded
= &s
->receiver_node
->loaded
;
657 s
->fci
->eof
= &s
->receiver_node
->eof
;
658 for (i
= 0; i
< nf
; i
++) {
659 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
660 fn
->conf
= a
->filter_conf
[i
];
662 fn
->filter
= a
->filters
[i
];
663 INIT_LIST_HEAD(&fn
->callbacks
);
664 list_add_tail(&fn
->node
, &s
->fci
->filters
);
665 fn
->filter
->open(fn
);
666 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
667 audio_formats
[s
->format
], i
+ 1, nf
,
668 fn
->filter
->name
, slot_num
);
669 s
->fci
->outbuf
= fn
->buf
;
670 s
->fci
->out_loaded
= &fn
->loaded
;
672 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s
->fci
,
676 static struct filter_node
*find_filter_node(int slot_num
, int format
, int filternum
)
678 struct filter_node
*fn
;
682 struct slot_info
*s
= &slot
[i
];
683 if (s
->format
< 0 || !s
->fci
)
685 if (slot_num
>= 0 && slot_num
!= i
)
687 if (format
>= 0 && s
->format
!= format
)
689 if (num_filters(i
) < filternum
)
693 list_for_each_entry(fn
, &s
->fci
->filters
, node
)
694 if (filternum
<= 0 || j
++ == filternum
)
701 static void start_stream_writer(int slot_num
)
703 int ret
, fds
[3] = {1, -1, -1};
704 struct slot_info
*s
= &slot
[slot_num
];
705 struct audio_format_info
*a
= &afi
[s
->format
];
709 glob
= glob_cmd(a
->write_cmd
);
711 glob
= para_strdup("para_play");
712 PARA_INFO_LOG("starting stream writer: %s\n", glob
);
713 open_filters(slot_num
);
714 ret
= para_exec_cmdline_pid(&s
->wpid
, glob
, fds
);
717 PARA_ERROR_LOG("exec failed (%d)\n", ret
);
720 s
->write_fd
= fds
[0];
721 add_close_on_fork_list(s
->write_fd
);
722 /* we write to this fd in do_select, so we need non-blocking */
723 fcntl(s
->write_fd
, F_SETFL
, O_NONBLOCK
);
724 gettimeofday(&s
->wstime
, NULL
);
725 current_decoder
= slot_num
;
726 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fci
->filters
);
729 static void open_receiver(int format
)
731 struct audio_format_info
*a
= &afi
[format
];
735 slot_num
= get_empty_slot();
737 clean_exit(EXIT_FAILURE
, PARA_STRERROR(-slot_num
));
740 gettimeofday(&s
->rtime
, NULL
);
742 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
743 s
->receiver_node
->conf
= a
->receiver_conf
;
744 ret
= a
->receiver
->open(s
->receiver_node
);
746 PARA_ERROR_LOG("failed to open receiver (%s)\n",
747 PARA_STRERROR(-ret
));
748 free(s
->receiver_node
);
749 s
->receiver_node
= NULL
;
752 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
753 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
756 static int is_frozen(int format
)
759 struct audio_format_info
*a
= &afi
[format
];
761 gettimeofday(&now
, NULL
);
762 return (tv_diff(&now
, &a
->restart_barrier
, NULL
) > 0)? 0 : 1;
765 static void start_current_receiver(void)
771 i
= get_audio_format_num(af_status
);
774 if ((decoder_running(i
) & 1) || is_frozen(i
))
779 static void compute_time_diff(const struct timeval
*status_time
)
781 struct timeval now
, tmp
, diff
;
784 const struct timeval max_deviation
= {0, 500 * 1000};
785 const int time_smooth
= 5;
787 gettimeofday(&now
, NULL
);
788 sign
= tv_diff(status_time
, &now
, &diff
);
789 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
790 // sign, sa_time_diff_sign);
792 sa_time_diff_sign
= sign
;
798 int s
= tv_diff(&diff
, &sa_time_diff
, &tmp
);
799 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
800 PARA_WARNING_LOG("time diff jump: %lims\n",
804 sa_time_diff_sign
= tv_convex_combination(
805 sa_time_diff_sign
* time_smooth
, &sa_time_diff
,
806 count
> 10? sign
: sign
* time_smooth
, &diff
,
809 PARA_INFO_LOG("time diff (cur/avg): "
811 sign
* diff
.tv_sec
, (diff
.tv_usec
+ 500) / 1000,
812 sa_time_diff_sign
* sa_time_diff
.tv_sec
,
813 (sa_time_diff
.tv_usec
+ 500)/ 1000);
816 static void check_stat_line(char *line
)
825 itemnum
= stat_line_valid(line
);
827 PARA_WARNING_LOG("invalid status line: %s\n", line
);
830 tmp
= make_message("%s\n", line
);
831 stat_client_write(tmp
, itemnum
);
833 free(stat_item_values
[itemnum
]);
834 stat_item_values
[itemnum
] = para_strdup(line
);
835 ilen
= strlen(status_item_list
[itemnum
]);
838 playing
= strstr(line
, "playing")? 1 : 0;
842 af_status
= para_strdup(line
+ ilen
+ 1);
845 offset_seconds
= atoi(line
+ ilen
+ 1);
848 length_seconds
= atoi(line
+ ilen
+ 1);
850 case SI_STREAM_START
:
851 if (sscanf(line
+ ilen
+ 1, "%lu.%lu",
852 &tv
.tv_sec
, &tv
.tv_usec
) == 2)
853 server_stream_start
= tv
;
855 case SI_CURRENT_TIME
:
856 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &tv
.tv_sec
,
858 compute_time_diff(&tv
);
863 static void handle_signal(int sig
)
867 return check_sigchld();
871 PARA_EMERG_LOG("terminating on signal %d\n", sig
);
872 clean_exit(EXIT_FAILURE
, "caught deadly signal");
877 static void check_timeouts(void)
880 int slot_num
, timeout
= conf
.stream_timeout_arg
;
882 gettimeofday(&now
, NULL
);
883 FOR_EACH_SLOT(slot_num
) {
884 struct slot_info
*s
= &slot
[slot_num
];
887 /* check read time */
888 if (s
->receiver_node
&&
889 now
.tv_sec
> s
->rtime
.tv_sec
+ timeout
) {
890 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
891 audio_formats
[s
->format
], slot_num
);
895 close_receiver(slot_num
);
897 /* check write time */
898 if (s
->wpid
> 0 && !s
->wkilled
&&
899 now
.tv_sec
> s
->wtime
.tv_sec
+ timeout
) {
900 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
901 audio_formats
[s
->format
], slot_num
);
908 static size_t get_loaded_bytes(int slot_num
)
911 struct slot_info
*s
= &slot
[slot_num
];
912 struct receiver_node
*rn
= s
->receiver_node
;
917 if (afi
[s
->format
].num_filters
) {
919 loaded
= *s
->fci
->out_loaded
;
929 static void close_decoder_if_idle(int slot_num
)
931 struct slot_info
*s
= &slot
[slot_num
];
932 struct receiver_node
*rn
= s
->receiver_node
;
938 if (!rn
->eof
&& !s
->fci
->error
&& s
->wpid
> 0)
940 if (!s
->fci
->error
&& s
->wpid
> 0) { /* eof */
941 if (filter_io(s
->fci
) > 0)
943 if (get_loaded_bytes(slot_num
))
946 if (s
->write_fd
> 0) {
947 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num
,
950 del_close_on_fork_list(s
->write_fd
);
954 return; /* wait until writer dies before closing filters */
955 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
957 close_filters(s
->fci
);
959 close_receiver(slot_num
);
960 clear_slot(slot_num
);
963 static int set_stream_fds(fd_set
*wfds
)
965 int i
, max_fileno
= -1;
969 struct slot_info
*s
= &slot
[i
];
970 struct audio_format_info
*a
;
971 struct receiver_node
*rn
;
973 close_decoder_if_idle(i
);
978 rn
= s
->receiver_node
;
979 if (rn
&& rn
->loaded
&& !s
->wpid
) {
980 PARA_INFO_LOG("no writer in slot %d\n", i
);
981 start_stream_writer(i
);
983 if (s
->write_fd
<= 0)
985 if (!get_loaded_bytes(i
))
987 FD_SET(s
->write_fd
, wfds
);
989 max_fileno
= MAX(s
->write_fd
, max_fileno
);
991 // PARA_INFO_LOG("return %d\n", max_fileno);
995 static int write_audio_data(int slot_num
)
997 struct slot_info
*s
= &slot
[slot_num
];
998 struct audio_format_info
*a
= &afi
[s
->format
];
999 struct receiver_node
*rn
= s
->receiver_node
;
1004 if (a
->num_filters
) {
1005 buf
= &s
->fci
->outbuf
;
1006 len
= s
->fci
->out_loaded
;
1011 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf
, *len
);
1012 rv
= write(s
->write_fd
, *buf
, *len
);
1013 PARA_DEBUG_LOG("wrote %d/%zd\n", rv
, *len
);
1015 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
1016 slot_num
, s
->write_fd
, strerror(errno
));
1018 s
->fci
->error
= E_WRITE_AUDIO_DATA
;
1019 } else if (rv
!= *len
) {
1020 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
1021 audio_formats
[s
->format
], rv
, *len
, slot_num
);
1023 memmove(*buf
, *buf
+ rv
, *len
);
1027 gettimeofday(&s
->wtime
, NULL
);
1031 static void slot_io(fd_set
*wfds
)
1036 struct slot_info
*s
= &slot
[i
];
1037 struct receiver_node
*rn
= s
->receiver_node
;
1039 if (rn
&& rn
->loaded
)
1040 gettimeofday(&s
->rtime
, NULL
);
1041 if (s
->format
>= 0 && s
->write_fd
> 0 && s
->fci
) {
1042 ret
= filter_io(s
->fci
);
1044 s
->fci
->error
= -ret
;
1045 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1046 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1048 if (s
->write_fd
<= 0 || !s
->wcheck
|| !FD_ISSET(s
->write_fd
, wfds
))
1050 write_audio_data(i
);
1054 static int parse_stream_command(const char *txt
, char **cmd
)
1056 char *p
= strchr(txt
, ':');
1060 return -E_MISSING_COLON
;
1062 FOR_EACH_AUDIO_FORMAT(i
) {
1063 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
1068 return -E_UNSUPPORTED_AUDIO_FORMAT
;
1071 static int add_filter(int format
, char *cmdline
)
1073 struct audio_format_info
*a
= &afi
[format
];
1074 int filter_num
, nf
= a
->num_filters
;
1076 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
1079 a
->filters
[nf
] = &filters
[filter_num
];
1081 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
1082 a
->filters
[nf
]->name
);
1086 static int setup_default_filters(void)
1090 FOR_EACH_AUDIO_FORMAT(i
) {
1091 struct audio_format_info
*a
= &afi
[i
];
1096 /* add "dec" to audio format name */
1097 tmp
= make_message("%sdec", audio_formats
[i
]);
1098 for (j
= 0; filters
[j
].name
; j
++)
1099 if (!strcmp(tmp
, filters
[j
].name
))
1102 ret
= -E_UNSUPPORTED_FILTER
;
1103 if (!filters
[j
].name
)
1105 tmp
= para_strdup(filters
[j
].name
);
1106 ret
= add_filter(i
, tmp
);
1110 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
], filters
[j
].name
);
1111 ret
= add_filter(i
, para_strdup("wav"));
1114 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats
[i
]);
1120 static int init_stream_io(void)
1122 int i
, ret
, receiver_num
;
1125 for (i
= 0; i
< conf
.stream_write_cmd_given
; i
++) {
1126 ret
= parse_stream_command(conf
.stream_write_cmd_arg
[i
], &cmd
);
1129 afi
[ret
].write_cmd
= para_strdup(cmd
);
1130 PARA_INFO_LOG("%s write command: %s\n", audio_formats
[ret
], afi
[ret
].write_cmd
);
1132 for (i
= 0; receivers
[i
].name
; i
++) {
1133 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
1134 receivers
[i
].init(&receivers
[i
]);
1136 for (i
= 0; i
< conf
.receiver_given
; i
++) {
1137 char *arg
= conf
.receiver_arg
[i
];
1138 char *recv
= strchr(arg
, ':');
1139 ret
= -E_MISSING_COLON
;
1144 ret
= get_audio_format_num(arg
);
1147 afi
[ret
].receiver_conf
= check_receiver_arg(recv
, &receiver_num
);
1148 if (!afi
[ret
].receiver_conf
) {
1149 ret
= -E_RECV_SYNTAX
;
1152 afi
[ret
].receiver
= &receivers
[receiver_num
];
1154 /* use the first available receiver with no arguments
1155 * for those audio formats for which no receiver
1158 cmd
= para_strdup(receivers
[0].name
);
1159 FOR_EACH_AUDIO_FORMAT(i
) {
1160 struct audio_format_info
*a
= &afi
[i
];
1161 if (a
->receiver_conf
)
1163 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
1164 if (!a
->receiver_conf
)
1165 return -E_RECV_SYNTAX
;
1166 a
->receiver
= &receivers
[receiver_num
];
1170 filter_init(filters
);
1171 FOR_EACH_AUDIO_FORMAT(i
) {
1172 afi
[i
].filter_conf
= para_malloc((conf
.filter_given
+ 1) * sizeof(char *));
1173 afi
[i
].filters
= para_malloc((conf
.filter_given
+ 1) * sizeof(struct filter
*));
1175 if (!conf
.no_default_filters_given
)
1176 return setup_default_filters();
1177 for (i
= 0; i
< conf
.filter_given
; i
++) {
1178 char *arg
= conf
.filter_arg
[i
];
1179 char *filter_name
= strchr(arg
, ':');
1180 ret
= -E_MISSING_COLON
;
1183 *filter_name
= '\0';
1185 ret
= get_audio_format_num(arg
);
1188 ret
= add_filter(ret
, filter_name
);
1197 static int dump_commands(int fd
)
1199 char *buf
= para_strdup(""), *tmp
= NULL
;
1203 FOR_EACH_COMMAND(i
) {
1204 tmp
= make_message("%s%s\t%s\n", buf
, cmds
[i
].name
,
1205 cmds
[i
].description
);
1209 ret
= client_write(fd
, buf
);
1215 * command handlers don't close their fd on errors (ret < 0) so that
1216 * its caller can send an error message. Otherwise (ret >= 0) it's up
1217 * to each individual command to close the fd if necessary.
1220 static int com_help(int fd
, int argc
, char **argv
)
1224 const char *dflt
= "No such command. Available commands:\n";
1227 ret
= dump_commands(fd
);
1230 FOR_EACH_COMMAND(i
) {
1231 if (strcmp(cmds
[i
].name
, argv
[1]))
1234 "NAME\n\t%s -- %s\n"
1235 "SYNOPSIS\n\tpara_audioc %s\n"
1236 "DESCRIPTION\n%s\n",
1238 cmds
[i
].description
,
1242 ret
= client_write(fd
, buf
);
1246 ret
= client_write(fd
, dflt
);
1248 ret
= dump_commands(fd
);
1255 static int com_stat(int fd
, __unused
int argc
, __unused
char **argv
)
1259 long unsigned mask
= ~0LU;
1263 for (i
= 1; i
< argc
; i
++) {
1264 ret
= stat_item_valid(argv
[i
]);
1270 PARA_INFO_LOG("mask: 0x%lx\n", mask
);
1271 if (mask
& (1 << SI_PLAY_TIME
)) {
1272 struct timeval
*t
= wstime();
1273 char *ts
= get_time_string(t
);
1275 ret
= client_write(fd
, ts
);
1281 if (mask
& (1 << SI_AUDIOD_UPTIME
)) {
1282 char *tmp
, *us
= uptime_str();
1283 tmp
= make_message("%s:%s\n",
1284 status_item_list
[SI_AUDIOD_UPTIME
], us
);
1286 ret
= client_write(fd
, tmp
);
1291 if (mask
& (1 << SI_AUDIOD_STATUS
)) {
1292 char *s
= audiod_status_string();
1293 ret
= client_write(fd
, s
);
1298 if (mask
& (1 << SI_DECODER_FLAGS
)) {
1299 char *df
=decoder_flags();
1300 ret
= client_write(fd
, df
);
1306 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
1308 if (!((1 << i
) & mask
))
1310 v
= stat_item_values
[i
];
1311 tmp
= make_message("%s%s%s", buf
? buf
: "",
1312 v
? v
: "", v
? "\n" : "");
1316 ret
= client_write(fd
, buf
);
1319 ret
= stat_client_add(fd
, mask
);
1325 static char *list_filters(void)
1328 char *tmp
, *msg
= make_message("format\tnum\tcmd\n");
1330 FOR_EACH_AUDIO_FORMAT(i
) {
1331 for (j
= 0; j
< afi
[i
].num_filters
; j
++) {
1332 tmp
= make_message("%s\t%i\t%s\n",
1333 afi
[i
].name
, j
, afi
[i
].filter_cmds
[j
]);
1334 msg
= para_strcat(msg
, tmp
);
1337 tmp
= make_message("%s\t%i\t%s\n", afi
[i
].name
,
1338 j
, afi
[i
].write_cmd
);
1339 msg
= para_strcat(msg
, tmp
);
1346 static int com_grab(int fd
, int argc
, char **argv
)
1348 struct grab_client
*gc
;
1349 struct filter_node
*fn
;
1353 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1354 gc
= grab_client_new(fd
, argc
, argv
, &err
);
1355 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1358 fn
= find_filter_node(gc
->conf
->slot_arg
, gc
->audio_format_num
, gc
->conf
->filter_num_arg
);
1360 activate_grab_client(gc
, fn
);
1363 if (err
!= -E_GC_HELP_GIVEN
&& err
!= -E_GC_VERSION_GIVEN
)
1365 if (err
== -E_GC_HELP_GIVEN
) {
1366 msg
= make_message("%s\n\n", grab_client_args_info_usage
);
1367 for (i
= 0; grab_client_args_info_help
[i
]; i
++) {
1368 char *tmp
= make_message("%s%s\n", msg
,
1369 grab_client_args_info_help
[i
]);
1374 msg
= make_message("%s %s\n",
1375 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE
,
1376 GRAB_CLIENT_CMDLINE_PARSER_VERSION
);
1377 err
= client_write(fd
, msg
);
1385 static int __noreturn
com_term(int fd
, __unused
int argc
, __unused
char **argv
)
1388 clean_exit(EXIT_SUCCESS
, "terminating on user request");
1391 static int com_on(int fd
, __unused
int argc
, __unused
char **argv
)
1393 audiod_status
= AUDIOD_ON
;
1398 static int com_off(int fd
, __unused
int argc
, __unused
char **argv
)
1400 audiod_status
= AUDIOD_OFF
;
1405 static int com_sb(int fd
, __unused
int argc
, __unused
char **argv
)
1407 audiod_status
= AUDIOD_STANDBY
;
1412 static int com_cycle(int fd
, int argc
, char **argv
)
1414 switch (audiod_status
) {
1416 return com_sb(fd
, argc
, argv
);
1419 return com_on(fd
, argc
, argv
);
1421 case AUDIOD_STANDBY
:
1422 return com_off(fd
, argc
, argv
);
1429 static int check_perms(struct ucred
*c
)
1433 if (!conf
.user_allow_given
)
1435 for (i
= 0; i
< conf
.user_allow_given
; i
++)
1436 if (c
->uid
== conf
.user_allow_arg
[i
])
1438 return -E_UCRED_PERM
;
1441 static int handle_connect(void)
1443 int i
, argc
, ret
, clifd
= -1;
1445 char *buf
= para_malloc(MAXLINE
), **argv
= NULL
;
1446 struct sockaddr_un unix_addr
;
1448 ret
= para_accept(audiod_socket
, &unix_addr
, sizeof(struct sockaddr_un
));
1452 ret
= recv_cred_buffer(clifd
, buf
, MAXLINE
- 1, &c
);
1455 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c
.pid
, c
.uid
, c
.gid
, ret
, buf
);
1457 ret
= check_perms(&c
);
1460 argc
= split_args(buf
, &argv
, '\n');
1461 PARA_INFO_LOG("argv[0]: %s\n", argv
[0]);
1462 for (i
= 0; cmds
[i
].name
; i
++) {
1463 if (strcmp(cmds
[i
].name
, argv
[0]))
1465 ret
= cmds
[i
].handler(clifd
, argc
+ 1, argv
);
1468 ret
= -E_INVALID_AUDIOD_CMD
; /* cmd not found */
1472 if (clifd
> 0 && ret
< 0 && ret
!= -E_CLIENT_WRITE
) {
1473 char *tmp
= make_message("%s\n", PARA_STRERROR(-ret
));
1474 client_write(clifd
, tmp
);
1481 static void audiod_get_socket(void)
1483 struct sockaddr_un unix_addr
;
1485 if (conf
.socket_given
)
1486 socket_name
= para_strdup(conf
.socket_arg
);
1488 char *hn
= para_hostname();
1489 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
1493 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name
);
1494 if (conf
.force_given
)
1495 unlink(socket_name
);
1496 audiod_socket
= create_pf_socket(socket_name
, &unix_addr
,
1497 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
1498 if (audiod_socket
< 0) {
1499 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1500 exit(EXIT_FAILURE
); /* do not unlink socket */
1502 if (listen(audiod_socket
, 5) < 0) {
1503 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1504 exit(EXIT_FAILURE
); /* do not unlink socket */
1506 add_close_on_fork_list(audiod_socket
);
1509 static int open_stat_pipe(void)
1511 int ret
, fd
[3] = {-1, 1, 0};
1513 ret
= para_exec_cmdline_pid(&pid
, BINDIR
"/para_client stat", fd
);
1516 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret
);
1517 add_close_on_fork_list(ret
);
1519 clean_exit(EXIT_FAILURE
, "failed to open status pipe");
1523 static int audiod_pre_select(fd_set
*rfds
, fd_set
*wfds
, struct timeval
*tv
)
1525 int i
, ret
, max
= -1;
1528 struct slot_info
*s
= &slot
[i
];
1529 struct audio_format_info
*a
;
1530 struct receiver_node
*rn
= s
->receiver_node
;
1531 if (s
->format
< 0 || !rn
)
1533 a
= &afi
[s
->format
];
1534 ret
= a
->receiver
->pre_select(rn
, rfds
, wfds
, tv
);
1535 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1536 max
= MAX(max
, ret
);
1541 static void audiod_post_select(int select_ret
, fd_set
*rfds
, fd_set
*wfds
)
1546 struct slot_info
*s
= &slot
[i
];
1547 struct audio_format_info
*a
;
1548 struct receiver_node
*rn
= s
->receiver_node
;
1549 if (s
->format
< 0 || !rn
|| rn
->eof
)
1551 a
= &afi
[s
->format
];
1552 ret
= a
->receiver
->post_select(rn
, select_ret
, rfds
, wfds
);
1555 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1556 a
->receiver
->name
, PARA_STRERROR(-ret
), i
);
1558 PARA_INFO_LOG("eof in slot %d\n", i
);
1561 if (ret
< 0 && s
->fci
)
1562 s
->fci
->error
= ret
;
1566 /* TODO: move everything before the select call to pre_select() */
1567 static void __noreturn
audiod_mainloop(void)
1570 int ret
, max_fileno
, sbo
= 0;
1571 char status_buf
[STRINGSIZE
] = "";
1576 /* always check signal pipe and the local socket */
1577 FD_SET(signal_pipe
, &rfds
);
1578 max_fileno
= signal_pipe
;
1579 FD_SET(audiod_socket
, &rfds
);
1580 max_fileno
= MAX(max_fileno
, audiod_socket
);
1582 if (audiod_status
!= AUDIOD_ON
)
1583 kill_all_decoders();
1585 start_current_receiver();
1587 max_fileno
= MAX(max_fileno
, set_stream_fds(&wfds
));
1589 if (stat_pipe
>= 0 && audiod_status
== AUDIOD_OFF
)
1591 if (stat_pipe
< 0 && audiod_status
!= AUDIOD_OFF
) {
1592 stat_pipe
= open_stat_pipe();
1594 status_buf
[0] = '\0';
1596 if (stat_pipe
>= 0 && audiod_status
!= AUDIOD_OFF
) {
1597 FD_SET(stat_pipe
, &rfds
);
1598 max_fileno
= MAX(max_fileno
, stat_pipe
);
1602 tv
.tv_usec
= 200 * 1000;
1603 ret
= audiod_pre_select(&rfds
, &wfds
, &tv
);
1604 max_fileno
= MAX(max_fileno
, ret
);
1606 ret
= select(max_fileno
+ 1, &rfds
, &wfds
, NULL
, &tv
);
1607 if (ret
< 0 && errno
!= EINTR
)
1608 PARA_ERROR_LOG("select returned %d (%s)\n", ret
,
1610 if (audiod_status
!= AUDIOD_OFF
)
1611 audiod_status_dump();
1614 audiod_post_select(ret
, &rfds
, &wfds
);
1615 /* read status pipe */
1616 if (stat_pipe
>=0 && FD_ISSET(stat_pipe
, &rfds
)) {
1617 ret
= read(stat_pipe
, status_buf
+ sbo
, STRINGSIZE
- 1 - sbo
);
1620 /* avoid busy loop if server is down */
1621 while (sleep(1) > 0)
1624 status_buf
[ret
+ sbo
] = '\0';
1625 sbo
= for_each_line(status_buf
, ret
+ sbo
,
1630 if (FD_ISSET(audiod_socket
, &rfds
)) {
1631 ret
= handle_connect();
1633 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
1637 if (FD_ISSET(signal_pipe
, &rfds
)) {
1638 int sig_nr
= para_next_signal();
1640 handle_signal(sig_nr
);
1645 static void set_initial_status(void)
1647 audiod_status
= AUDIOD_ON
;
1648 if (!conf
.mode_given
)
1650 if (!strcmp(conf
.mode_arg
, "sb")) {
1651 audiod_status
= AUDIOD_STANDBY
;
1654 if (!strcmp(conf
.mode_arg
, "off")) {
1655 audiod_status
= AUDIOD_OFF
;
1658 if (strcmp(conf
.mode_arg
, "on"))
1659 PARA_WARNING_LOG("%s", "invalid mode\n");
1662 int __noreturn
main(int argc
, char *argv
[])
1668 hostname
= para_hostname();
1669 cmdline_parser(argc
, argv
, &conf
);
1670 para_drop_privileges(conf
.user_arg
);
1671 cf
= configfile_exists();
1673 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0)) {
1674 fprintf(stderr
, "parse error in config file\n");
1678 log_welcome("para_audiod", conf
.loglevel_arg
);
1679 i
= init_stream_io();
1681 fprintf(stderr
, "init stream io error: %s\n",
1685 server_uptime(UPTIME_SET
);
1686 set_initial_status();
1690 setup_signal_handling();
1691 if (conf
.daemon_given
)
1693 audiod_get_socket(); /* doesn't return on errors */