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 */
23 #include "audiod.cmdline.h"
25 #include "close_on_fork.h"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
39 #include "write_common.h"
41 /** define the array of error lists needed by para_audiod */
43 /** define the array containing all supported audio formats */
44 DEFINE_AUDIO_FORMAT_ARRAY
;
47 * the possible modes of operation
49 * - off: disconnect from para_server
50 * - on: receive status information from para_server and play the audio stream
51 * - sb: only receive status information but not the audio stream
53 enum {AUDIOD_OFF
, AUDIOD_ON
, AUDIOD_STANDBY
};
55 /** defines how to handle one supported audio format */
56 struct audio_format_info
{
57 /** pointer to the receiver for this audio format */
58 struct receiver
*receiver
;
59 /** the receiver configuration */
61 /** the number of filters that should be activated for this audio format */
62 unsigned int num_filters
;
63 /** pointer to the array of filters to be activated */
64 struct filter
**filters
;
65 /** pointer to the array of filter configurations */
67 /** the number of filters that should be activated for this audio format */
68 unsigned int num_writers
;
69 /** pointer to the array of writers to be activated */
70 struct writer
**writers
;
71 /** pointer to the array of writer configurations */
73 /** do not start receiver/filters/writer before this time */
74 struct timeval restart_barrier
;
78 * describes one instance of a receiver-filter-writer chain
80 * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
81 * writer_node, writer_node_group.
84 /** number of the audio format in this slot */
86 /** time of the last successful read from the receiver */
88 /** time the last write to the write fd happend */
90 /** writer start time */
91 struct timeval wstime
;
92 /** the receiver info associated with this slot */
93 struct receiver_node
*receiver_node
;
94 /** the active filter chain */
95 struct filter_chain
*fc
;
96 /** the active writer node group */
97 struct writer_node_group
*wng
;
99 static struct slot_info slot
[MAX_STREAM_SLOTS
];
101 extern const char *status_item_list
[NUM_STAT_ITEMS
];
103 static struct gengetopt_args_info conf
;
104 static struct timeval server_stream_start
, sa_time_diff
;
105 static int playing
, current_decoder
= -1,
106 audiod_status
= AUDIOD_ON
, offset_seconds
, length_seconds
,
107 sa_time_diff_sign
= 1;
108 static char *af_status
, /* the audio format announced in server status */
109 *socket_name
, *hostname
;
110 static char *stat_item_values
[NUM_STAT_ITEMS
];
111 static FILE *logfile
;
112 static const struct timeval restart_delay
= {0, 300 * 1000};
113 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
114 static struct timeval
*now
;
116 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
118 struct command_task
{
122 static struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
127 char buf
[STRINGSIZE
];
130 static struct status_task status_task_struct
, *stat_task
= &status_task_struct
;
135 static struct audiod_task audiod_task_struct
, *at
= &audiod_task_struct
;
144 /** defines one command of para_audiod */
145 struct audiod_command
{
146 /** the name of the command */
148 /** pointer to the function that handles the command */
149 int (*handler
)(int, int, char**);
150 int (*line_handler
)(int, char*);
151 /** one-line description of the command */
152 const char *description
;
153 /** summary of the command line options */
154 const char *synopsis
;
155 /** the long help text */
158 static int com_grab(int, char *);
159 static int com_cycle(int, int, char **);
160 static int com_help(int, int, char **);
161 static int com_off(int, int, char **);
162 static int com_on(int, int, char **);
163 static int com_sb(int, int, char **);
164 static int com_stat(int, int, char **);
165 static int com_term(int, int, char **);
166 static struct audiod_command cmds
[] = {
169 .handler
= com_cycle
,
170 .description
= "switch to next mode",
174 "on -> standby -> off -> on\n"
179 .line_handler
= com_grab
,
180 .description
= "grab the audio stream",
181 .synopsis
= "-- grab [grab_options]",
184 "grab ('splice') the audio stream at any position in the filter \n"
185 "chain and send that data back to the client. Try\n"
186 "\t para_audioc -- grab -h\n"
187 "for the list of available options.\n"
193 .description
= "display command list or help for given command",
194 .synopsis
= "help [command]",
197 "When I was younger, so much younger than today, I never needed\n"
198 "anybody's help in any way. But now these days are gone, I'm not so\n"
199 "self assured. Now I find I've changed my mind and opened up the doors.\n"
201 " -- Beatles: Help\n"
207 .description
= "deactivate para_audiod",
211 "Close connection to para_server and stop all decoders.\n"
217 .description
= "activate para_audiod",
221 "Establish connection to para_server, retrieve para_server's current\n"
222 "status. If playing, start corresponding decoder. Otherwise stop\n"
229 .description
= "enter standby mode",
233 "Stop all decoders but leave connection to para_server open.\n"
239 .description
= "print status information",
240 .synopsis
= "stat [item1 ...]",
243 "Dump given status items (all if none given) to stdout.\n"
249 .description
= "terminate audiod",
253 "Stop all decoders, shut down connection to para_server and exit.\n"
261 /** iterate over all slots */
262 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
263 /** iterate over all supported audio formats */
264 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
265 /** iterate over the array of all audiod commands */
266 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
269 * get the audio format number
270 * \param name the name of the audio format
272 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
273 * \a name is not a supported audio format.
275 int get_audio_format_num(char *name
)
278 FOR_EACH_AUDIO_FORMAT(i
)
279 if (!strcmp(name
, audio_formats
[i
]))
281 return -E_UNSUPPORTED_AUDIO_FORMAT
;
285 * log function. first argument is loglevel.
287 void para_log(int ll
, const char* fmt
,...)
293 char str
[MAXLINE
] = "";
295 if (ll
< conf
.loglevel_arg
)
297 outfd
= logfile
? logfile
: stderr
;
300 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
301 fprintf(outfd
, "%s %s ", str
, hostname
);
302 if (conf
.loglevel_arg
<= INFO
)
303 fprintf(outfd
, "%i ", ll
);
305 vfprintf(outfd
, fmt
, argp
);
309 static int client_write(int fd
, const char *buf
)
311 size_t len
= strlen(buf
);
312 return write(fd
, buf
, len
) != len
? -E_CLIENT_WRITE
: 1;
315 static char *get_time_string(struct timeval
*newest_stime
)
317 struct timeval diff
, adj_stream_start
, tmp
;
318 int total
= 0, use_server_time
= 1;
323 return make_message("%s:\n", status_item_list
[SI_PLAY_TIME
]);
325 if (audiod_status
== AUDIOD_OFF
)
327 if (sa_time_diff_sign
> 0)
328 tv_diff(&server_stream_start
, &sa_time_diff
,
331 tv_add(&server_stream_start
, &sa_time_diff
,
333 tmp
= adj_stream_start
;
334 if (newest_stime
&& audiod_status
== AUDIOD_ON
) {
335 tv_diff(newest_stime
, &adj_stream_start
, &diff
);
336 if (tv2ms(&diff
) < 5000) {
341 tv_diff(now
, &tmp
, &diff
);
342 total
= diff
.tv_sec
+ offset_seconds
;
343 if (total
> length_seconds
)
344 total
= length_seconds
;
349 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
350 status_item_list
[SI_PLAY_TIME
],
351 use_server_time
? "~" : "",
354 (length_seconds
- total
) / 60,
355 (length_seconds
- total
) % 60,
356 length_seconds
? (total
* 100 + length_seconds
/ 2) /
363 __malloc
static char *audiod_status_string(void)
365 const char *status
= (audiod_status
== AUDIOD_ON
)?
366 "on" : (audiod_status
== AUDIOD_OFF
)? "off": "sb";
367 return make_message("%s:%s\n", status_item_list
[SI_AUDIOD_STATUS
], status
);
370 static struct timeval
*wstime(void)
373 struct timeval
*max
= NULL
;
375 struct slot_info
*s
= &slot
[i
];
378 if (max
&& tv_diff(&s
->wstime
, max
, NULL
) <= 0)
384 __malloc
static char *decoder_flags(void)
387 char decoder_flags
[MAX_STREAM_SLOTS
+ 1];
390 struct slot_info
*s
= &slot
[i
];
392 if (s
->receiver_node
)
396 decoder_flags
[i
] = flag
;
398 decoder_flags
[MAX_STREAM_SLOTS
] = '\0';
399 return make_message("%s:%s\n", status_item_list
[SI_DECODER_FLAGS
],
403 static char *configfile_exists(void)
405 static char *config_file
;
408 char *home
= para_homedir();
409 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
412 return file_exists(config_file
)? config_file
: NULL
;
415 static void setup_signal_handling(void)
417 sig_task
->fd
= para_signal_init();
418 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
419 para_install_sighandler(SIGINT
);
420 para_install_sighandler(SIGTERM
);
421 para_install_sighandler(SIGCHLD
);
422 para_install_sighandler(SIGHUP
);
423 signal(SIGPIPE
, SIG_IGN
);
426 static void audiod_status_dump(void)
428 static char *p_ts
, *p_us
, *p_as
, *p_df
;
429 struct timeval
*t
= wstime();
430 char *us
, *tmp
= get_time_string(t
);
432 if (tmp
&& (!p_ts
|| strcmp(tmp
, p_ts
)))
433 stat_client_write(tmp
, SI_PLAY_TIME
);
438 tmp
= make_message("%s:%s\n", status_item_list
[SI_AUDIOD_UPTIME
], us
);
440 if (!p_us
|| strcmp(p_us
, tmp
))
441 stat_client_write(tmp
, SI_AUDIOD_UPTIME
);
445 tmp
= audiod_status_string();
446 if (!p_as
|| strcmp(p_as
, tmp
))
447 stat_client_write(tmp
, SI_AUDIOD_STATUS
);
451 tmp
= decoder_flags();
452 if (!p_df
|| strcmp(p_df
, tmp
))
453 stat_client_write(tmp
, SI_DECODER_FLAGS
);
458 static void clear_slot(int slot_num
)
460 struct slot_info
*s
= &slot
[slot_num
];
462 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
463 memset(s
, 0, sizeof(struct slot_info
));
467 static void close_receiver(int slot_num
)
469 struct slot_info
*s
= &slot
[slot_num
];
470 struct audio_format_info
*a
;
472 if (s
->format
< 0 || !s
->receiver_node
)
475 PARA_NOTICE_LOG("closing %s recevier in slot %d (eof = %d)\n",
476 audio_formats
[s
->format
] , slot_num
, s
->receiver_node
->eof
);
477 if (!s
->receiver_node
->eof
)
478 unregister_task(&s
->receiver_node
->task
);
479 a
->receiver
->close(s
->receiver_node
);
480 free(s
->receiver_node
);
481 s
->receiver_node
= NULL
;
482 /* set restart barrier */
483 tv_add(now
, &restart_delay
, &afi
[s
->format
].restart_barrier
);
486 static void kill_all_decoders(void)
491 struct slot_info
*s
= &slot
[i
];
492 if (s
->receiver_node
)
493 s
->receiver_node
->eof
= 1;
497 static void check_sigchld(void)
502 pid
= para_reap_child();
505 PARA_CRIT_LOG("para_client died (pid %d)\n", pid
);
506 goto reap_next_child
;
509 static int get_empty_slot(void)
522 if (s
->receiver_node
)
529 return -E_NO_MORE_SLOTS
;
532 static int decoder_running(int format
)
539 if (s
->format
== format
&& s
->receiver_node
)
541 if (s
->format
== format
&& s
->wng
)
547 static void close_stat_pipe(void)
551 if (stat_task
->fd
< 0)
553 PARA_NOTICE_LOG("%s", "closing status pipe\n");
554 close(stat_task
->fd
);
555 del_close_on_fork_list(stat_task
->fd
);
558 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
559 free(stat_item_values
[i
]);
560 stat_item_values
[i
] = NULL
;
565 audiod_status_dump();
567 stat_item_values
[SI_STATUS_BAR
] = make_message("%s:no connection to para_server\n",
568 status_item_list
[SI_STATUS_BAR
]);
569 stat_client_write(stat_item_values
[SI_STATUS_BAR
], SI_STATUS_BAR
);
572 static void __noreturn
clean_exit(int status
, const char *msg
)
574 PARA_EMERG_LOG("%s\n", msg
);
578 if (stat_task
->fd
>= 0)
583 /** get the number of filters for the given audio format */
584 int num_filters(int audio_format_num
)
586 return afi
[audio_format_num
].num_filters
;
589 void filter_event_handler(struct task
*t
)
591 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
595 static void open_filters(int slot_num
)
597 struct slot_info
*s
= &slot
[slot_num
];
598 struct audio_format_info
*a
= &afi
[s
->format
];
599 int nf
= a
->num_filters
;
605 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
606 s
->fc
= para_calloc(sizeof(struct filter_chain
));
607 INIT_LIST_HEAD(&s
->fc
->filters
);
608 s
->fc
->inbuf
= s
->receiver_node
->buf
;
609 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
610 s
->fc
->input_eof
= &s
->receiver_node
->eof
;
612 s
->fc
->task
.pre_select
= filter_pre_select
;
613 s
->fc
->task
.event_handler
= filter_event_handler
;
614 s
->fc
->task
.private_data
= s
->fc
;
615 s
->fc
->task
.flags
= 0;
617 sprintf(s
->fc
->task
.status
, "filter chain");
618 for (i
= 0; i
< nf
; i
++) {
619 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
620 fn
->conf
= a
->filter_conf
[i
];
622 fn
->filter
= a
->filters
[i
];
623 INIT_LIST_HEAD(&fn
->callbacks
);
624 list_add_tail(&fn
->node
, &s
->fc
->filters
);
625 fn
->filter
->open(fn
);
626 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
627 audio_formats
[s
->format
], i
+ 1, nf
,
628 fn
->filter
->name
, slot_num
);
629 s
->fc
->outbuf
= fn
->buf
;
630 s
->fc
->out_loaded
= &fn
->loaded
;
632 register_task(&s
->fc
->task
);
633 // PARA_DEBUG_LOG("output loaded for filter chain %p: %p\n", s->fc,
634 // s->fc->out_loaded);
637 static struct filter_node
*find_filter_node(int slot_num
, int format
, int filternum
)
639 struct filter_node
*fn
;
643 struct slot_info
*s
= &slot
[i
];
644 if (s
->format
< 0 || !s
->fc
)
646 if (slot_num
>= 0 && slot_num
!= i
)
648 if (format
>= 0 && s
->format
!= format
)
650 if (num_filters(i
) < filternum
)
654 list_for_each_entry(fn
, &s
->fc
->filters
, node
)
655 if (filternum
<= 0 || j
++ == filternum
)
662 static void wng_event_handler(struct task
*t
)
664 struct writer_node_group
*g
= t
->private_data
;
667 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t
->ret
));
670 if (slot
[i
].wng
!= g
)
678 static void open_writer(int slot_num
)
681 struct slot_info
*s
= &slot
[slot_num
];
682 struct audio_format_info
*a
= &afi
[s
->format
];
684 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
686 s
->wng
= setup_default_wng();
688 s
->wng
= wng_new(a
->num_writers
);
690 s
->wng
->buf
= s
->fc
->outbuf
;
691 s
->wng
->loaded
= s
->fc
->out_loaded
;
692 s
->wng
->input_eof
= &s
->fc
->eof
;
693 s
->fc
->output_eof
= &s
->wng
->eof
;
695 s
->wng
->buf
= s
->receiver_node
->buf
;
696 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
697 s
->wng
->input_eof
= &s
->receiver_node
->eof
;
699 s
->wng
->task
.event_handler
= wng_event_handler
;
700 for (i
= 0; i
< a
->num_writers
; i
++) {
701 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
702 s
->wng
->writer_nodes
[i
].writer
= a
->writers
[i
];
703 sprintf(s
->wng
->writer_nodes
[i
].task
.status
, "writer_ node");
705 ret
= wng_open(s
->wng
);
707 current_decoder
= slot_num
;
708 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fc
->filters
);
711 void rn_event_handler(struct task
*t
)
713 // struct receiver_node *rn = t->private_data;
714 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
718 static void open_receiver(int format
)
720 struct audio_format_info
*a
= &afi
[format
];
723 struct receiver_node
*rn
;
725 slot_num
= get_empty_slot();
727 clean_exit(EXIT_FAILURE
, PARA_STRERROR(-slot_num
));
732 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
733 rn
= s
->receiver_node
;
734 rn
->receiver
= a
->receiver
;
735 rn
->conf
= a
->receiver_conf
;
736 ret
= a
->receiver
->open(s
->receiver_node
);
738 PARA_ERROR_LOG("failed to open receiver (%s)\n",
739 PARA_STRERROR(-ret
));
740 free(s
->receiver_node
);
741 s
->receiver_node
= NULL
;
744 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
745 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
746 rn
->task
.private_data
= s
->receiver_node
;
747 PARA_NOTICE_LOG("rn = %p\n", rn
->task
.private_data
);
748 rn
->task
.pre_select
= a
->receiver
->pre_select
;
749 rn
->task
.post_select
= a
->receiver
->post_select
;
750 rn
->task
.event_handler
= rn_event_handler
;
752 sprintf(rn
->task
.status
, "receiver node");
753 register_task(&rn
->task
);
756 static int is_frozen(int format
)
758 struct audio_format_info
*a
= &afi
[format
];
760 return (tv_diff(now
, &a
->restart_barrier
, NULL
) > 0)? 0 : 1;
763 static void open_current_receiver(void)
769 i
= get_audio_format_num(af_status
);
772 if (decoder_running(i
) || is_frozen(i
))
777 static void compute_time_diff(const struct timeval
*status_time
)
779 struct timeval tmp
, diff
;
782 const struct timeval max_deviation
= {0, 500 * 1000};
783 const int time_smooth
= 5;
785 sign
= tv_diff(status_time
, now
, &diff
);
786 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
787 // sign, sa_time_diff_sign);
789 sa_time_diff_sign
= sign
;
795 int s
= tv_diff(&diff
, &sa_time_diff
, &tmp
);
796 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
797 PARA_WARNING_LOG("time diff jump: %lims\n",
801 sa_time_diff_sign
= tv_convex_combination(
802 sa_time_diff_sign
* time_smooth
, &sa_time_diff
,
803 count
> 10? sign
: sign
* time_smooth
, &diff
,
806 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
809 sa_time_diff_sign
? "+" : "-",
814 static void check_stat_line(char *line
)
818 long unsigned sec
, usec
;
821 // PARA_INFO_LOG("line: %s\n", line);
824 itemnum
= stat_line_valid(line
);
826 PARA_WARNING_LOG("invalid status line: %s\n", line
);
829 tmp
= make_message("%s\n", line
);
830 stat_client_write(tmp
, itemnum
);
832 free(stat_item_values
[itemnum
]);
833 stat_item_values
[itemnum
] = para_strdup(line
);
834 ilen
= strlen(status_item_list
[itemnum
]);
837 playing
= strstr(line
, "playing")? 1 : 0;
841 af_status
= para_strdup(line
+ ilen
+ 1);
844 offset_seconds
= atoi(line
+ ilen
+ 1);
847 length_seconds
= atoi(line
+ ilen
+ 1);
849 case SI_STREAM_START
:
850 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
851 server_stream_start
.tv_sec
= sec
;
852 server_stream_start
.tv_usec
= usec
;
855 case SI_CURRENT_TIME
:
856 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
857 struct timeval tv
= {sec
, usec
};
858 compute_time_diff(&tv
);
864 static void handle_signal(int sig
)
868 return check_sigchld();
872 PARA_EMERG_LOG("terminating on signal %d\n", sig
);
873 clean_exit(EXIT_FAILURE
, "caught deadly signal");
878 static void check_timeouts(void)
881 int slot_num
, timeout
= conf
.stream_timeout_arg
;
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 stream (slot %d) not ready\n",
891 audio_formats
[s
->format
], slot_num
);
892 s
->receiver_node
->eof
= 1;
897 static void close_decoder_if_idle(int slot_num
)
899 struct slot_info
*s
= &slot
[slot_num
];
907 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
909 close_filters(s
->fc
);
911 close_receiver(slot_num
);
912 clear_slot(slot_num
);
915 static void audiod_pre_select(struct sched
*s
, __a_unused
struct task
*t
)
920 if (audiod_status
!= AUDIOD_ON
)
923 open_current_receiver();
926 struct receiver_node
*rn
;
928 close_decoder_if_idle(i
);
929 if (slot
[i
].format
< 0)
931 rn
= slot
[i
].receiver_node
;
932 if (rn
&& rn
->loaded
&& !slot
[i
].wng
) {
939 static void audiod_post_select(struct sched
*s
, __a_unused
struct task
*t
)
945 struct receiver_node
*rn
= slot
[i
].receiver_node
;
947 if (rn
&& rn
->loaded
)
948 slot
[i
].rtime
= *now
;
952 static void init_audiod_task(struct audiod_task
*at
)
954 at
->task
.pre_select
= audiod_pre_select
;
955 at
->task
.post_select
= audiod_post_select
;
956 at
->task
.private_data
= at
;
958 sprintf(at
->task
.status
, "audiod task");
961 static int parse_stream_command(const char *txt
, char **cmd
)
963 char *p
= strchr(txt
, ':');
967 return -E_MISSING_COLON
;
969 FOR_EACH_AUDIO_FORMAT(i
) {
970 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
975 return -E_UNSUPPORTED_AUDIO_FORMAT
;
978 static int add_filter(int format
, char *cmdline
)
980 struct audio_format_info
*a
= &afi
[format
];
981 int filter_num
, nf
= a
->num_filters
;
983 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
986 a
->filters
[nf
] = &filters
[filter_num
];
988 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
989 a
->filters
[nf
]->name
);
993 static int setup_default_filters(void)
997 FOR_EACH_AUDIO_FORMAT(i
) {
998 struct audio_format_info
*a
= &afi
[i
];
1003 /* add "dec" to audio format name */
1004 tmp
= make_message("%sdec", audio_formats
[i
]);
1005 for (j
= 0; filters
[j
].name
; j
++)
1006 if (!strcmp(tmp
, filters
[j
].name
))
1009 ret
= -E_UNSUPPORTED_FILTER
;
1010 if (!filters
[j
].name
)
1012 tmp
= para_strdup(filters
[j
].name
);
1013 ret
= add_filter(i
, tmp
);
1017 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
1019 ret
= add_filter(i
, "wav");
1022 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats
[i
]);
1028 static int init_writers(void)
1032 struct audio_format_info
*a
;
1034 init_supported_writers();
1035 nw
= PARA_MAX(1, conf
.writer_given
);
1036 PARA_INFO_LOG("allocating space for %d writers\n", nw
);
1037 FOR_EACH_AUDIO_FORMAT(i
) {
1039 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
1040 a
->writers
= para_malloc(nw
* sizeof(struct writer
*));
1043 for (i
= 0; i
< conf
.writer_given
; i
++) {
1046 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
1050 nw
= a
->num_writers
;
1051 wconf
= check_writer_arg(cmd
, &writer_num
);
1056 a
->writers
[nw
] = &writers
[ret
];
1057 a
->writer_conf
[nw
] = wconf
;
1058 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
1059 nw
, writer_names
[writer_num
]);
1067 static int init_receivers(void)
1069 int i
, ret
, receiver_num
;
1071 struct audio_format_info
*a
;
1073 for (i
= 0; receivers
[i
].name
; i
++) {
1074 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
1075 receivers
[i
].init(&receivers
[i
]);
1077 for (i
= 0; i
< conf
.receiver_given
; i
++) {
1078 char *arg
= conf
.receiver_arg
[i
];
1079 char *recv
= strchr(arg
, ':');
1080 ret
= -E_MISSING_COLON
;
1085 ret
= get_audio_format_num(arg
);
1088 afi
[ret
].receiver_conf
= check_receiver_arg(recv
, &receiver_num
);
1089 if (!afi
[ret
].receiver_conf
) {
1090 ret
= -E_RECV_SYNTAX
;
1093 afi
[ret
].receiver
= &receivers
[receiver_num
];
1095 /* use the first available receiver with no arguments
1096 * for those audio formats for which no receiver
1099 cmd
= para_strdup(receivers
[0].name
);
1100 FOR_EACH_AUDIO_FORMAT(i
) {
1102 if (a
->receiver_conf
)
1104 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
1105 if (!a
->receiver_conf
)
1106 return -E_RECV_SYNTAX
;
1107 a
->receiver
= &receivers
[receiver_num
];
1114 static int init_filters(void)
1118 filter_init(filters
);
1119 nf
= PARA_MAX(2, conf
.filter_given
) + 1;
1120 PARA_INFO_LOG("allocating space for %d filters\n", nf
);
1121 FOR_EACH_AUDIO_FORMAT(i
) {
1122 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
1123 afi
[i
].filters
= para_malloc(nf
* sizeof(struct filter
*));
1125 if (!conf
.no_default_filters_given
)
1126 return setup_default_filters();
1127 for (i
= 0; i
< conf
.filter_given
; i
++) {
1128 char *arg
= conf
.filter_arg
[i
];
1129 char *filter_name
= strchr(arg
, ':');
1130 ret
= -E_MISSING_COLON
;
1133 *filter_name
= '\0';
1135 ret
= get_audio_format_num(arg
);
1138 ret
= add_filter(ret
, filter_name
);
1147 static int init_stream_io(void)
1151 ret
= init_writers();
1154 ret
= init_receivers();
1157 ret
= init_filters();
1163 static int dump_commands(int fd
)
1165 char *buf
= para_strdup(""), *tmp
= NULL
;
1169 FOR_EACH_COMMAND(i
) {
1170 tmp
= make_message("%s%s\t%s\n", buf
, cmds
[i
].name
,
1171 cmds
[i
].description
);
1175 ret
= client_write(fd
, buf
);
1181 * command handlers don't close their fd on errors (ret < 0) so that
1182 * its caller can send an error message. Otherwise (ret >= 0) it's up
1183 * to each individual command to close the fd if necessary.
1186 static int com_help(int fd
, int argc
, char **argv
)
1190 const char *dflt
= "No such command. Available commands:\n";
1193 ret
= dump_commands(fd
);
1196 FOR_EACH_COMMAND(i
) {
1197 if (strcmp(cmds
[i
].name
, argv
[1]))
1200 "NAME\n\t%s -- %s\n"
1201 "SYNOPSIS\n\tpara_audioc %s\n"
1202 "DESCRIPTION\n%s\n",
1204 cmds
[i
].description
,
1208 ret
= client_write(fd
, buf
);
1212 ret
= client_write(fd
, dflt
);
1214 ret
= dump_commands(fd
);
1221 static int com_stat(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1225 long unsigned mask
= ~0LU;
1229 for (i
= 1; i
< argc
; i
++) {
1230 ret
= stat_item_valid(argv
[i
]);
1236 PARA_INFO_LOG("mask: 0x%lx\n", mask
);
1237 if (mask
& (1 << SI_PLAY_TIME
)) {
1238 struct timeval
*t
= wstime();
1239 char *ts
= get_time_string(t
);
1241 ret
= client_write(fd
, ts
);
1247 if (mask
& (1 << SI_AUDIOD_UPTIME
)) {
1248 char *tmp
, *us
= uptime_str();
1249 tmp
= make_message("%s:%s\n",
1250 status_item_list
[SI_AUDIOD_UPTIME
], us
);
1252 ret
= client_write(fd
, tmp
);
1257 if (mask
& (1 << SI_AUDIOD_STATUS
)) {
1258 char *s
= audiod_status_string();
1259 ret
= client_write(fd
, s
);
1264 if (mask
& (1 << SI_DECODER_FLAGS
)) {
1265 char *df
=decoder_flags();
1266 ret
= client_write(fd
, df
);
1272 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
1274 if (!((1 << i
) & mask
))
1276 v
= stat_item_values
[i
];
1277 tmp
= make_message("%s%s%s", buf
? buf
: "",
1278 v
? v
: "", v
? "\n" : "");
1282 ret
= client_write(fd
, buf
);
1285 ret
= stat_client_add(fd
, mask
);
1290 static int com_grab(int fd
, char *cmdline
)
1292 struct grab_client
*gc
;
1293 struct filter_node
*fn
;
1297 gc
= grab_client_new(fd
, cmdline
, &err
);
1300 fn
= find_filter_node(gc
->conf
->slot_arg
, gc
->audio_format_num
, gc
->conf
->filter_num_arg
);
1302 activate_grab_client(gc
, fn
);
1305 if (err
!= -E_GC_HELP_GIVEN
&& err
!= -E_GC_VERSION_GIVEN
)
1307 if (err
== -E_GC_HELP_GIVEN
) {
1308 msg
= make_message("%s\n\n", grab_client_args_info_usage
);
1309 for (i
= 0; grab_client_args_info_help
[i
]; i
++) {
1310 char *tmp
= make_message("%s%s\n", msg
,
1311 grab_client_args_info_help
[i
]);
1316 msg
= make_message("%s %s\n",
1317 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE
,
1318 GRAB_CLIENT_CMDLINE_PARSER_VERSION
);
1319 err
= client_write(fd
, msg
);
1327 static int __noreturn
com_term(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1330 clean_exit(EXIT_SUCCESS
, "terminating on user request");
1333 static int com_on(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1335 audiod_status
= AUDIOD_ON
;
1340 static int com_off(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1342 audiod_status
= AUDIOD_OFF
;
1347 static int com_sb(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1349 audiod_status
= AUDIOD_STANDBY
;
1354 static int com_cycle(int fd
, int argc
, char **argv
)
1356 switch (audiod_status
) {
1358 return com_sb(fd
, argc
, argv
);
1361 return com_on(fd
, argc
, argv
);
1363 case AUDIOD_STANDBY
:
1364 return com_off(fd
, argc
, argv
);
1371 static int check_perms(uid_t uid
)
1375 if (!conf
.user_allow_given
)
1377 for (i
= 0; i
< conf
.user_allow_given
; i
++)
1378 if (uid
== conf
.user_allow_arg
[i
])
1380 return -E_UCRED_PERM
;
1383 static int handle_connect(void)
1385 int i
, argc
, ret
, clifd
= -1;
1386 char *cmd
= NULL
, *p
, *buf
= para_calloc(MAXLINE
), **argv
= NULL
;
1387 struct sockaddr_un unix_addr
;
1389 ret
= para_accept(cmd_task
->fd
, &unix_addr
, sizeof(struct sockaddr_un
));
1393 ret
= recv_cred_buffer(clifd
, buf
, MAXLINE
- 1);
1396 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret
, buf
);
1397 ret
= check_perms(ret
);
1400 ret
= -E_INVALID_AUDIOD_CMD
;
1401 cmd
= para_strdup(buf
);
1402 p
= strchr(cmd
, '\n');
1409 for (i
= 0; cmds
[i
].name
; i
++) {
1411 if (strcmp(cmds
[i
].name
, cmd
))
1413 if (cmds
[i
].handler
) {
1414 argc
= split_args(buf
, &argv
, "\n");
1415 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv
[0], argc
);
1416 ret
= cmds
[i
].handler(clifd
, argc
, argv
);
1419 for (j
= 0; p
[j
]; j
++)
1422 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd
, p
);
1423 ret
= cmds
[i
].line_handler(clifd
, p
);
1426 ret
= -E_INVALID_AUDIOD_CMD
; /* cmd not found */
1431 if (clifd
> 0 && ret
< 0 && ret
!= -E_CLIENT_WRITE
) {
1432 char *tmp
= make_message("%s\n", PARA_STRERROR(-ret
));
1433 client_write(clifd
, tmp
);
1440 static void audiod_get_socket(void)
1442 struct sockaddr_un unix_addr
;
1444 if (conf
.socket_given
)
1445 socket_name
= para_strdup(conf
.socket_arg
);
1447 char *hn
= para_hostname();
1448 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
1452 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name
);
1453 if (conf
.force_given
)
1454 unlink(socket_name
);
1455 cmd_task
->fd
= create_pf_socket(socket_name
, &unix_addr
,
1456 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
1457 if (cmd_task
->fd
< 0) {
1458 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1459 exit(EXIT_FAILURE
); /* do not unlink socket */
1461 if (listen(cmd_task
->fd
, 5) < 0) {
1462 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1463 exit(EXIT_FAILURE
); /* do not unlink socket */
1465 add_close_on_fork_list(cmd_task
->fd
);
1468 static int open_stat_pipe(void)
1470 int ret
, fd
[3] = {-1, 1, 0};
1472 ret
= para_exec_cmdline_pid(&pid
, BINDIR
"/para_client stat", fd
);
1475 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret
);
1476 add_close_on_fork_list(ret
);
1478 clean_exit(EXIT_FAILURE
, "failed to open status pipe");
1482 void signal_event_handler(struct task
*t
)
1484 struct signal_task
*st
= t
->private_data
;
1485 handle_signal(st
->signum
);
1488 void signal_pre_select(struct sched
*s
, struct task
*t
)
1490 struct signal_task
*st
= t
->private_data
;
1492 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
1495 void signal_post_select(struct sched
*s
, struct task
*t
)
1497 struct signal_task
*st
= t
->private_data
;
1499 if (!FD_ISSET(st
->fd
, &s
->rfds
))
1501 t
->ret
= -E_SIGNAL_CAUGHT
;
1502 st
->signum
= para_next_signal();
1505 void signal_setup_default(struct signal_task
*st
)
1507 st
->task
.pre_select
= signal_pre_select
;
1508 st
->task
.post_select
= signal_post_select
;
1509 st
->task
.private_data
= st
;
1511 sprintf(st
->task
.status
, "signal task");
1514 static void command_pre_select(struct sched
*s
, struct task
*t
)
1516 struct command_task
*ct
= t
->private_data
;
1517 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1521 static void command_post_select(struct sched
*s
, struct task
*t
)
1524 struct command_task
*ct
= t
->private_data
;
1526 if (audiod_status
!= AUDIOD_OFF
)
1527 audiod_status_dump();
1528 t
->ret
= 1; /* always successful */
1529 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
1531 ret
= handle_connect();
1533 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
1536 void init_command_task(struct command_task
*ct
)
1538 ct
->task
.pre_select
= command_pre_select
;
1539 ct
->task
.post_select
= command_post_select
;
1540 ct
->task
.private_data
= ct
;
1542 sprintf(ct
->task
.status
, "command task");
1545 static void status_pre_select(struct sched
*s
, struct task
*t
)
1547 struct status_task
*st
= t
->private_data
;
1549 if (st
->fd
>= 0 && audiod_status
== AUDIOD_OFF
)
1551 if (st
->fd
< 0 && audiod_status
!= AUDIOD_OFF
) {
1552 st
->fd
= open_stat_pipe();
1556 if (st
->fd
>= 0 && audiod_status
!= AUDIOD_OFF
)
1557 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
1560 static void status_post_select(struct sched
*s
, struct task
*t
)
1562 struct status_task
*st
= t
->private_data
;
1566 if (st
->fd
< 0 || !FD_ISSET(st
->fd
, &s
->rfds
))
1568 ret
= read(st
->fd
, st
->buf
+ st
->loaded
,
1569 STRINGSIZE
- 1 - st
->loaded
);
1572 /* avoid busy loop if server is down */
1573 while (sleep(1) > 0)
1576 st
->buf
[ret
+ st
->loaded
] = '\0';
1577 st
->loaded
= for_each_line(st
->buf
, ret
+ st
->loaded
,
1582 static void init_status_task(struct status_task
*st
)
1584 st
->task
.pre_select
= status_pre_select
;
1585 st
->task
.post_select
= status_post_select
;
1586 st
->task
.private_data
= st
;
1591 sprintf(st
->task
.status
, "status task");
1594 static void set_initial_status(void)
1596 audiod_status
= AUDIOD_ON
;
1597 if (!conf
.mode_given
)
1599 if (!strcmp(conf
.mode_arg
, "sb")) {
1600 audiod_status
= AUDIOD_STANDBY
;
1603 if (!strcmp(conf
.mode_arg
, "off")) {
1604 audiod_status
= AUDIOD_OFF
;
1607 if (strcmp(conf
.mode_arg
, "on"))
1608 PARA_WARNING_LOG("%s", "invalid mode\n");
1611 int main(int argc
, char *argv
[])
1620 hostname
= para_hostname();
1621 cmdline_parser(argc
, argv
, &conf
);
1622 para_drop_privileges(conf
.user_arg
, conf
.group_arg
);
1623 cf
= configfile_exists();
1625 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0)) {
1626 PARA_EMERG_LOG("%s", "parse error in config file\n");
1630 if (conf
.logfile_given
)
1631 logfile
= open_log(conf
.logfile_arg
);
1632 log_welcome("para_audiod", conf
.loglevel_arg
);
1633 i
= init_stream_io();
1635 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i
));
1638 server_uptime(UPTIME_SET
);
1639 set_initial_status();
1643 setup_signal_handling();
1644 if (conf
.daemon_given
)
1646 audiod_get_socket(); /* doesn't return on errors */
1648 signal_setup_default(sig_task
);
1649 sig_task
->task
.event_handler
= signal_event_handler
;
1651 init_status_task(stat_task
);
1652 init_command_task(cmd_task
);
1653 init_audiod_task(at
);
1655 register_task(&sig_task
->task
);
1656 register_task(&cmd_task
->task
);
1657 register_task(&stat_task
->task
);
1658 register_task(&at
->task
);
1659 s
.default_timeout
.tv_sec
= 0;
1660 s
.default_timeout
.tv_usec
= 99 * 1000;
1663 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
1664 return EXIT_FAILURE
;