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 /** writer start time */
87 struct timeval wstime
;
88 /** the receiver info associated with this slot */
89 struct receiver_node
*receiver_node
;
90 /** the active filter chain */
91 struct filter_chain
*fc
;
92 /** the active writer node group */
93 struct writer_node_group
*wng
;
95 static struct slot_info slot
[MAX_STREAM_SLOTS
];
97 extern const char *status_item_list
[NUM_STAT_ITEMS
];
99 static struct gengetopt_args_info conf
;
100 static struct timeval server_stream_start
, sa_time_diff
;
101 static int playing
, current_decoder
= -1,
102 audiod_status
= AUDIOD_ON
, offset_seconds
, length_seconds
,
103 sa_time_diff_sign
= 1;
104 static char *af_status
, /* the audio format announced in server status */
105 *socket_name
, *hostname
;
106 static char *stat_item_values
[NUM_STAT_ITEMS
];
107 static FILE *logfile
;
108 static const struct timeval restart_delay
= {0, 300 * 1000};
109 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
110 static struct timeval
*now
;
112 static struct signal_task signal_task_struct
, *sig_task
= &signal_task_struct
;
114 struct command_task
{
118 static struct command_task command_task_struct
, *cmd_task
= &command_task_struct
;
123 char buf
[STRINGSIZE
];
126 static struct status_task status_task_struct
, *stat_task
= &status_task_struct
;
131 static struct audiod_task audiod_task_struct
, *at
= &audiod_task_struct
;
140 /** defines one command of para_audiod */
141 struct audiod_command
{
142 /** the name of the command */
144 /** pointer to the function that handles the command */
145 int (*handler
)(int, int, char**);
146 int (*line_handler
)(int, char*);
147 /** one-line description of the command */
148 const char *description
;
149 /** summary of the command line options */
150 const char *synopsis
;
151 /** the long help text */
154 static int com_grab(int, char *);
155 static int com_cycle(int, int, char **);
156 static int com_help(int, int, char **);
157 static int com_off(int, int, char **);
158 static int com_on(int, int, char **);
159 static int com_sb(int, int, char **);
160 static int com_stat(int, int, char **);
161 static int com_term(int, int, char **);
162 static struct audiod_command cmds
[] = {
165 .handler
= com_cycle
,
166 .description
= "switch to next mode",
170 "on -> standby -> off -> on\n"
175 .line_handler
= com_grab
,
176 .description
= "grab the audio stream",
177 .synopsis
= "-- grab [grab_options]",
180 "grab ('splice') the audio stream at any position in the filter \n"
181 "chain and send that data back to the client. Try\n"
182 "\t para_audioc -- grab -h\n"
183 "for the list of available options.\n"
189 .description
= "display command list or help for given command",
190 .synopsis
= "help [command]",
193 "When I was younger, so much younger than today, I never needed\n"
194 "anybody's help in any way. But now these days are gone, I'm not so\n"
195 "self assured. Now I find I've changed my mind and opened up the doors.\n"
197 " -- Beatles: Help\n"
203 .description
= "deactivate para_audiod",
207 "Close connection to para_server and stop all decoders.\n"
213 .description
= "activate para_audiod",
217 "Establish connection to para_server, retrieve para_server's current\n"
218 "status. If playing, start corresponding decoder. Otherwise stop\n"
225 .description
= "enter standby mode",
229 "Stop all decoders but leave connection to para_server open.\n"
235 .description
= "print status information",
236 .synopsis
= "stat [item1 ...]",
239 "Dump given status items (all if none given) to stdout.\n"
245 .description
= "terminate audiod",
249 "Stop all decoders, shut down connection to para_server and exit.\n"
257 /** iterate over all slots */
258 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
259 /** iterate over all supported audio formats */
260 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
261 /** iterate over the array of all audiod commands */
262 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
265 * get the audio format number
266 * \param name the name of the audio format
268 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
269 * \a name is not a supported audio format.
271 int get_audio_format_num(char *name
)
274 FOR_EACH_AUDIO_FORMAT(i
)
275 if (!strcmp(name
, audio_formats
[i
]))
277 return -E_UNSUPPORTED_AUDIO_FORMAT
;
281 * log function. first argument is loglevel.
283 void para_log(int ll
, const char* fmt
,...)
289 char str
[MAXLINE
] = "";
291 if (ll
< conf
.loglevel_arg
)
293 outfd
= logfile
? logfile
: stderr
;
296 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
297 fprintf(outfd
, "%s %s ", str
, hostname
);
298 if (conf
.loglevel_arg
<= INFO
)
299 fprintf(outfd
, "%i ", ll
);
301 vfprintf(outfd
, fmt
, argp
);
305 static int client_write(int fd
, const char *buf
)
307 size_t len
= strlen(buf
);
308 return write(fd
, buf
, len
) != len
? -E_CLIENT_WRITE
: 1;
311 static char *get_time_string(struct timeval
*newest_stime
)
313 struct timeval diff
, adj_stream_start
, tmp
;
314 int total
= 0, use_server_time
= 1;
319 return make_message("%s:\n", status_item_list
[SI_PLAY_TIME
]);
321 if (audiod_status
== AUDIOD_OFF
)
323 if (sa_time_diff_sign
> 0)
324 tv_diff(&server_stream_start
, &sa_time_diff
,
327 tv_add(&server_stream_start
, &sa_time_diff
,
329 tmp
= adj_stream_start
;
330 if (newest_stime
&& audiod_status
== AUDIOD_ON
) {
331 tv_diff(newest_stime
, &adj_stream_start
, &diff
);
332 if (tv2ms(&diff
) < 5000) {
337 tv_diff(now
, &tmp
, &diff
);
338 total
= diff
.tv_sec
+ offset_seconds
;
339 if (total
> length_seconds
)
340 total
= length_seconds
;
345 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
346 status_item_list
[SI_PLAY_TIME
],
347 use_server_time
? "~" : "",
350 (length_seconds
- total
) / 60,
351 (length_seconds
- total
) % 60,
352 length_seconds
? (total
* 100 + length_seconds
/ 2) /
359 __malloc
static char *audiod_status_string(void)
361 const char *status
= (audiod_status
== AUDIOD_ON
)?
362 "on" : (audiod_status
== AUDIOD_OFF
)? "off": "sb";
363 return make_message("%s:%s\n", status_item_list
[SI_AUDIOD_STATUS
], status
);
366 static struct timeval
*wstime(void)
369 struct timeval
*max
= NULL
;
371 struct slot_info
*s
= &slot
[i
];
374 if (max
&& tv_diff(&s
->wstime
, max
, NULL
) <= 0)
380 __malloc
static char *decoder_flags(void)
383 char decoder_flags
[MAX_STREAM_SLOTS
+ 1];
386 struct slot_info
*s
= &slot
[i
];
388 if (s
->receiver_node
)
392 decoder_flags
[i
] = flag
;
394 decoder_flags
[MAX_STREAM_SLOTS
] = '\0';
395 return make_message("%s:%s\n", status_item_list
[SI_DECODER_FLAGS
],
399 static char *configfile_exists(void)
401 static char *config_file
;
404 char *home
= para_homedir();
405 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
408 return file_exists(config_file
)? config_file
: NULL
;
411 static void setup_signal_handling(void)
413 sig_task
->fd
= para_signal_init();
414 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task
->fd
);
415 para_install_sighandler(SIGINT
);
416 para_install_sighandler(SIGTERM
);
417 para_install_sighandler(SIGCHLD
);
418 para_install_sighandler(SIGHUP
);
419 signal(SIGPIPE
, SIG_IGN
);
422 static void audiod_status_dump(void)
424 static char *p_ts
, *p_us
, *p_as
, *p_df
;
425 struct timeval
*t
= wstime();
426 char *us
, *tmp
= get_time_string(t
);
428 if (tmp
&& (!p_ts
|| strcmp(tmp
, p_ts
)))
429 stat_client_write(tmp
, SI_PLAY_TIME
);
434 tmp
= make_message("%s:%s\n", status_item_list
[SI_AUDIOD_UPTIME
], us
);
436 if (!p_us
|| strcmp(p_us
, tmp
))
437 stat_client_write(tmp
, SI_AUDIOD_UPTIME
);
441 tmp
= audiod_status_string();
442 if (!p_as
|| strcmp(p_as
, tmp
))
443 stat_client_write(tmp
, SI_AUDIOD_STATUS
);
447 tmp
= decoder_flags();
448 if (!p_df
|| strcmp(p_df
, tmp
))
449 stat_client_write(tmp
, SI_DECODER_FLAGS
);
454 static void clear_slot(int slot_num
)
456 struct slot_info
*s
= &slot
[slot_num
];
458 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
459 memset(s
, 0, sizeof(struct slot_info
));
463 static void close_receiver(int slot_num
)
465 struct slot_info
*s
= &slot
[slot_num
];
466 struct audio_format_info
*a
;
468 if (s
->format
< 0 || !s
->receiver_node
)
471 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
472 audio_formats
[s
->format
] , slot_num
, s
->receiver_node
->eof
);
473 if (!s
->receiver_node
->eof
)
474 unregister_task(&s
->receiver_node
->task
);
475 a
->receiver
->close(s
->receiver_node
);
476 free(s
->receiver_node
);
477 s
->receiver_node
= NULL
;
478 /* set restart barrier */
479 tv_add(now
, &restart_delay
, &afi
[s
->format
].restart_barrier
);
482 static void kill_all_decoders(void)
487 struct slot_info
*s
= &slot
[i
];
488 if (s
->receiver_node
)
489 s
->receiver_node
->eof
= 1;
493 static int get_empty_slot(void)
504 if (s
->wng
|| s
->receiver_node
|| s
->fc
)
509 return -E_NO_MORE_SLOTS
;
512 static int decoder_running(int format
)
519 if (s
->format
== format
&& s
->receiver_node
)
521 if (s
->format
== format
&& s
->wng
)
527 static void close_stat_pipe(void)
531 if (stat_task
->fd
< 0)
533 PARA_NOTICE_LOG("%s", "closing status pipe\n");
534 close(stat_task
->fd
);
535 del_close_on_fork_list(stat_task
->fd
);
538 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
539 free(stat_item_values
[i
]);
540 stat_item_values
[i
] = NULL
;
545 audiod_status_dump();
547 stat_item_values
[SI_STATUS_BAR
] = make_message(
548 "%s:no connection to para_server\n",
549 status_item_list
[SI_STATUS_BAR
]);
550 stat_client_write(stat_item_values
[SI_STATUS_BAR
], SI_STATUS_BAR
);
553 static void __noreturn
clean_exit(int status
, const char *msg
)
555 PARA_EMERG_LOG("%s\n", msg
);
559 if (stat_task
->fd
>= 0)
565 * get the number of filters
567 * \param audio_format_num the number identifying the audio format
569 * \return the number of filters for the given audio format
573 int num_filters(int audio_format_num
)
575 return afi
[audio_format_num
].num_filters
;
578 static void filter_event_handler(struct task
*t
)
580 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
584 static void open_filters(int slot_num
)
586 struct slot_info
*s
= &slot
[slot_num
];
587 struct audio_format_info
*a
= &afi
[s
->format
];
588 int nf
= a
->num_filters
;
594 PARA_INFO_LOG("opening %s filters\n", audio_formats
[s
->format
]);
595 s
->fc
= para_calloc(sizeof(struct filter_chain
));
596 INIT_LIST_HEAD(&s
->fc
->filters
);
597 s
->fc
->inbuf
= s
->receiver_node
->buf
;
598 s
->fc
->in_loaded
= &s
->receiver_node
->loaded
;
599 s
->fc
->input_eof
= &s
->receiver_node
->eof
;
601 s
->fc
->task
.pre_select
= filter_pre_select
;
602 s
->fc
->task
.event_handler
= filter_event_handler
;
603 s
->fc
->task
.private_data
= s
->fc
;
604 s
->fc
->task
.flags
= 0;
606 sprintf(s
->fc
->task
.status
, "filter chain");
607 for (i
= 0; i
< nf
; i
++) {
608 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
609 fn
->conf
= a
->filter_conf
[i
];
611 fn
->filter
= a
->filters
[i
];
612 INIT_LIST_HEAD(&fn
->callbacks
);
613 list_add_tail(&fn
->node
, &s
->fc
->filters
);
614 fn
->filter
->open(fn
);
615 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
616 audio_formats
[s
->format
], i
+ 1, nf
,
617 fn
->filter
->name
, slot_num
);
618 s
->fc
->outbuf
= fn
->buf
;
619 s
->fc
->out_loaded
= &fn
->loaded
;
621 register_task(&s
->fc
->task
);
622 // PARA_DEBUG_LOG("output loaded for filter chain %p: %p\n", s->fc,
623 // s->fc->out_loaded);
626 static struct filter_node
*find_filter_node(int slot_num
, int format
, int filternum
)
628 struct filter_node
*fn
;
632 struct slot_info
*s
= &slot
[i
];
633 if (s
->format
< 0 || !s
->fc
)
635 if (slot_num
>= 0 && slot_num
!= i
)
637 if (format
>= 0 && s
->format
!= format
)
639 if (num_filters(i
) < filternum
)
643 list_for_each_entry(fn
, &s
->fc
->filters
, node
)
644 if (filternum
<= 0 || j
++ == filternum
)
651 static void wng_event_handler(struct task
*t
)
653 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t
->ret
));
657 static void open_writers(int slot_num
)
660 struct slot_info
*s
= &slot
[slot_num
];
661 struct audio_format_info
*a
= &afi
[s
->format
];
663 PARA_INFO_LOG("opening %s writers\n", audio_formats
[s
->format
]);
665 s
->wng
= setup_default_wng();
667 s
->wng
= wng_new(a
->num_writers
);
669 s
->wng
->buf
= s
->fc
->outbuf
;
670 s
->wng
->loaded
= s
->fc
->out_loaded
;
671 s
->wng
->input_eof
= &s
->fc
->eof
;
672 s
->fc
->output_eof
= &s
->wng
->eof
;
674 s
->wng
->buf
= s
->receiver_node
->buf
;
675 s
->wng
->loaded
= &s
->receiver_node
->loaded
;
676 s
->wng
->input_eof
= &s
->receiver_node
->eof
;
678 s
->wng
->task
.event_handler
= wng_event_handler
;
679 for (i
= 0; i
< a
->num_writers
; i
++) {
680 s
->wng
->writer_nodes
[i
].conf
= a
->writer_conf
[i
];
681 s
->wng
->writer_nodes
[i
].writer
= a
->writers
[i
];
682 sprintf(s
->wng
->writer_nodes
[i
].task
.status
, "writer_node");
684 ret
= wng_open(s
->wng
);
686 current_decoder
= slot_num
;
687 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fc
->filters
);
690 static void rn_event_handler(struct task
*t
)
692 // struct receiver_node *rn = t->private_data;
693 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
697 static void open_receiver(int format
)
699 struct audio_format_info
*a
= &afi
[format
];
702 struct receiver_node
*rn
;
704 slot_num
= get_empty_slot();
706 clean_exit(EXIT_FAILURE
, PARA_STRERROR(-slot_num
));
709 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
710 rn
= s
->receiver_node
;
711 rn
->receiver
= a
->receiver
;
712 rn
->conf
= a
->receiver_conf
;
713 ret
= a
->receiver
->open(s
->receiver_node
);
715 PARA_ERROR_LOG("failed to open receiver (%s)\n",
716 PARA_STRERROR(-ret
));
717 free(s
->receiver_node
);
718 s
->receiver_node
= NULL
;
721 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
722 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
723 rn
->task
.private_data
= s
->receiver_node
;
724 rn
->task
.pre_select
= a
->receiver
->pre_select
;
725 rn
->task
.post_select
= a
->receiver
->post_select
;
726 rn
->task
.event_handler
= rn_event_handler
;
728 sprintf(rn
->task
.status
, "receiver node");
729 register_task(&rn
->task
);
732 static int is_frozen(int format
)
734 struct audio_format_info
*a
= &afi
[format
];
736 return (tv_diff(now
, &a
->restart_barrier
, NULL
) > 0)? 0 : 1;
739 static void open_current_receiver(void)
745 i
= get_audio_format_num(af_status
);
748 if (decoder_running(i
) || is_frozen(i
))
753 static void compute_time_diff(const struct timeval
*status_time
)
755 struct timeval tmp
, diff
;
758 const struct timeval max_deviation
= {0, 500 * 1000};
759 const int time_smooth
= 5;
761 sign
= tv_diff(status_time
, now
, &diff
);
762 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
763 // sign, sa_time_diff_sign);
765 sa_time_diff_sign
= sign
;
771 int s
= tv_diff(&diff
, &sa_time_diff
, &tmp
);
772 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
773 PARA_WARNING_LOG("time diff jump: %lims\n",
777 sa_time_diff_sign
= tv_convex_combination(
778 sa_time_diff_sign
* time_smooth
, &sa_time_diff
,
779 count
> 10? sign
: sign
* time_smooth
, &diff
,
782 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
785 sa_time_diff_sign
? "+" : "-",
790 static void check_stat_line(char *line
)
794 long unsigned sec
, usec
;
797 // PARA_INFO_LOG("line: %s\n", line);
800 itemnum
= stat_line_valid(line
);
802 PARA_WARNING_LOG("invalid status line: %s\n", line
);
805 tmp
= make_message("%s\n", line
);
806 stat_client_write(tmp
, itemnum
);
808 free(stat_item_values
[itemnum
]);
809 stat_item_values
[itemnum
] = para_strdup(line
);
810 ilen
= strlen(status_item_list
[itemnum
]);
813 playing
= strstr(line
, "playing")? 1 : 0;
817 af_status
= para_strdup(line
+ ilen
+ 1);
820 offset_seconds
= atoi(line
+ ilen
+ 1);
823 length_seconds
= atoi(line
+ ilen
+ 1);
825 case SI_STREAM_START
:
826 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
827 server_stream_start
.tv_sec
= sec
;
828 server_stream_start
.tv_usec
= usec
;
831 case SI_CURRENT_TIME
:
832 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
833 struct timeval tv
= {sec
, usec
};
834 compute_time_diff(&tv
);
840 static void handle_signal(int sig
)
845 pid_t pid
= para_reap_child();
848 PARA_CRIT_LOG("para_client died (pid %d)\n", pid
);
853 PARA_EMERG_LOG("terminating on signal %d\n", sig
);
854 clean_exit(EXIT_FAILURE
, "caught deadly signal");
859 static void try_to_close_slot(int slot_num
)
861 struct slot_info
*s
= &slot
[slot_num
];
865 if (s
->receiver_node
&& !s
->receiver_node
->eof
)
867 if (s
->fc
&& !s
->fc
->eof
)
869 if (s
->wng
&& !s
->wng
->eof
)
871 PARA_INFO_LOG("closing slot %d \n", slot_num
);
874 close_filters(s
->fc
);
876 close_receiver(slot_num
);
877 clear_slot(slot_num
);
880 static void audiod_pre_select(struct sched
*s
, __a_unused
struct task
*t
)
885 if (audiod_status
!= AUDIOD_ON
)
888 open_current_receiver();
890 struct receiver_node
*rn
;
892 try_to_close_slot(i
);
893 if (slot
[i
].format
< 0)
895 rn
= slot
[i
].receiver_node
;
896 if (rn
&& rn
->loaded
&& !slot
[i
].wng
) {
903 static void audiod_post_select(struct sched
*s
, __a_unused
struct task
*t
)
905 /* only save away the current time for other users */
909 static void init_audiod_task(struct audiod_task
*at
)
911 at
->task
.pre_select
= audiod_pre_select
;
912 at
->task
.post_select
= audiod_post_select
;
913 at
->task
.private_data
= at
;
915 sprintf(at
->task
.status
, "audiod task");
918 static int parse_stream_command(const char *txt
, char **cmd
)
920 char *p
= strchr(txt
, ':');
924 return -E_MISSING_COLON
;
926 FOR_EACH_AUDIO_FORMAT(i
) {
927 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
932 return -E_UNSUPPORTED_AUDIO_FORMAT
;
935 static int add_filter(int format
, char *cmdline
)
937 struct audio_format_info
*a
= &afi
[format
];
938 int filter_num
, nf
= a
->num_filters
;
940 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
943 a
->filters
[nf
] = &filters
[filter_num
];
945 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
946 a
->filters
[nf
]->name
);
950 static int init_writers(void)
954 struct audio_format_info
*a
;
956 init_supported_writers();
957 nw
= PARA_MAX(1, conf
.writer_given
);
958 PARA_INFO_LOG("maximal number of writers: %d\n", nw
);
959 FOR_EACH_AUDIO_FORMAT(i
) {
961 a
->writer_conf
= para_malloc(nw
* sizeof(void *));
962 a
->writers
= para_malloc(nw
* sizeof(struct writer
*));
965 for (i
= 0; i
< conf
.writer_given
; i
++) {
968 ret
= parse_stream_command(conf
.writer_arg
[i
], &cmd
);
973 wconf
= check_writer_arg(cmd
, &writer_num
);
978 a
->writers
[nw
] = &writers
[writer_num
];
979 a
->writer_conf
[nw
] = wconf
;
980 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats
[ret
],
981 nw
, writer_names
[writer_num
]);
989 static int init_receivers(void)
991 int i
, ret
, receiver_num
;
993 struct audio_format_info
*a
;
995 for (i
= 0; receivers
[i
].name
; i
++) {
996 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
997 receivers
[i
].init(&receivers
[i
]);
999 for (i
= 0; i
< conf
.receiver_given
; i
++) {
1000 char *arg
= conf
.receiver_arg
[i
];
1001 char *recv
= strchr(arg
, ':');
1002 ret
= -E_MISSING_COLON
;
1007 ret
= get_audio_format_num(arg
);
1010 afi
[ret
].receiver_conf
= check_receiver_arg(recv
, &receiver_num
);
1011 if (!afi
[ret
].receiver_conf
) {
1012 ret
= -E_RECV_SYNTAX
;
1015 afi
[ret
].receiver
= &receivers
[receiver_num
];
1017 /* use the first available receiver with no arguments
1018 * for those audio formats for which no receiver
1021 cmd
= para_strdup(receivers
[0].name
);
1022 FOR_EACH_AUDIO_FORMAT(i
) {
1024 if (a
->receiver_conf
)
1026 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
1027 if (!a
->receiver_conf
)
1028 return -E_RECV_SYNTAX
;
1029 a
->receiver
= &receivers
[receiver_num
];
1037 static int init_default_filters(void)
1041 FOR_EACH_AUDIO_FORMAT(i
) {
1042 struct audio_format_info
*a
= &afi
[i
];
1047 continue; /* no default -- nothing to to */
1048 /* add "dec" to audio format name */
1049 tmp
= make_message("%sdec", audio_formats
[i
]);
1050 for (j
= 0; filters
[j
].name
; j
++)
1051 if (!strcmp(tmp
, filters
[j
].name
))
1054 ret
= -E_UNSUPPORTED_FILTER
;
1055 if (!filters
[j
].name
)
1057 tmp
= para_strdup(filters
[j
].name
);
1058 ret
= add_filter(i
, tmp
);
1062 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
1069 static int init_filters(void)
1073 filter_init(filters
);
1074 nf
= PARA_MAX(1, conf
.filter_given
);
1075 PARA_INFO_LOG("maximal number of filters: %d\n", nf
);
1076 FOR_EACH_AUDIO_FORMAT(i
) {
1077 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(void *));
1078 afi
[i
].filters
= para_malloc(nf
* sizeof(struct filter
*));
1080 if (!conf
.no_default_filters_given
)
1081 return init_default_filters();
1082 for (i
= 0; i
< conf
.filter_given
; i
++) {
1083 char *arg
= conf
.filter_arg
[i
];
1084 char *filter_name
= strchr(arg
, ':');
1085 ret
= -E_MISSING_COLON
;
1088 *filter_name
= '\0';
1090 ret
= get_audio_format_num(arg
);
1093 ret
= add_filter(ret
, filter_name
);
1097 ret
= init_default_filters(); /* use default values for the rest */
1102 static int init_stream_io(void)
1106 ret
= init_writers();
1109 ret
= init_receivers();
1112 ret
= init_filters();
1118 static int dump_commands(int fd
)
1120 char *buf
= para_strdup(""), *tmp
= NULL
;
1124 FOR_EACH_COMMAND(i
) {
1125 tmp
= make_message("%s%s\t%s\n", buf
, cmds
[i
].name
,
1126 cmds
[i
].description
);
1130 ret
= client_write(fd
, buf
);
1136 * command handlers don't close their fd on errors (ret < 0) so that
1137 * its caller can send an error message. Otherwise (ret >= 0) it's up
1138 * to each individual command to close the fd if necessary.
1141 static int com_help(int fd
, int argc
, char **argv
)
1145 const char *dflt
= "No such command. Available commands:\n";
1148 ret
= dump_commands(fd
);
1151 FOR_EACH_COMMAND(i
) {
1152 if (strcmp(cmds
[i
].name
, argv
[1]))
1155 "NAME\n\t%s -- %s\n"
1156 "SYNOPSIS\n\tpara_audioc %s\n"
1157 "DESCRIPTION\n%s\n",
1159 cmds
[i
].description
,
1163 ret
= client_write(fd
, buf
);
1167 ret
= client_write(fd
, dflt
);
1169 ret
= dump_commands(fd
);
1176 static int com_stat(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1180 long unsigned mask
= ~0LU;
1184 for (i
= 1; i
< argc
; i
++) {
1185 ret
= stat_item_valid(argv
[i
]);
1191 PARA_INFO_LOG("mask: 0x%lx\n", mask
);
1192 if (mask
& (1 << SI_PLAY_TIME
)) {
1193 struct timeval
*t
= wstime();
1194 char *ts
= get_time_string(t
);
1196 ret
= client_write(fd
, ts
);
1202 if (mask
& (1 << SI_AUDIOD_UPTIME
)) {
1203 char *tmp
, *us
= uptime_str();
1204 tmp
= make_message("%s:%s\n",
1205 status_item_list
[SI_AUDIOD_UPTIME
], us
);
1207 ret
= client_write(fd
, tmp
);
1212 if (mask
& (1 << SI_AUDIOD_STATUS
)) {
1213 char *s
= audiod_status_string();
1214 ret
= client_write(fd
, s
);
1219 if (mask
& (1 << SI_DECODER_FLAGS
)) {
1220 char *df
=decoder_flags();
1221 ret
= client_write(fd
, df
);
1227 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
1229 if (!((1 << i
) & mask
))
1231 v
= stat_item_values
[i
];
1232 tmp
= make_message("%s%s%s", buf
? buf
: "",
1233 v
? v
: "", v
? "\n" : "");
1237 ret
= client_write(fd
, buf
);
1240 ret
= stat_client_add(fd
, mask
);
1245 static int com_grab(int fd
, char *cmdline
)
1247 struct grab_client
*gc
;
1248 struct filter_node
*fn
;
1252 gc
= grab_client_new(fd
, cmdline
, &err
);
1255 fn
= find_filter_node(gc
->conf
->slot_arg
, gc
->audio_format_num
, gc
->conf
->filter_num_arg
);
1257 activate_grab_client(gc
, fn
);
1260 if (err
!= -E_GC_HELP_GIVEN
&& err
!= -E_GC_VERSION_GIVEN
)
1262 if (err
== -E_GC_HELP_GIVEN
) {
1263 msg
= make_message("%s\n\n", grab_client_args_info_usage
);
1264 for (i
= 0; grab_client_args_info_help
[i
]; i
++) {
1265 char *tmp
= make_message("%s%s\n", msg
,
1266 grab_client_args_info_help
[i
]);
1271 msg
= make_message("%s %s\n",
1272 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE
,
1273 GRAB_CLIENT_CMDLINE_PARSER_VERSION
);
1274 err
= client_write(fd
, msg
);
1282 static int __noreturn
com_term(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1285 clean_exit(EXIT_SUCCESS
, "terminating on user request");
1288 static int com_on(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1290 audiod_status
= AUDIOD_ON
;
1295 static int com_off(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1297 audiod_status
= AUDIOD_OFF
;
1302 static int com_sb(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1304 audiod_status
= AUDIOD_STANDBY
;
1309 static int com_cycle(int fd
, int argc
, char **argv
)
1311 switch (audiod_status
) {
1313 return com_sb(fd
, argc
, argv
);
1316 return com_on(fd
, argc
, argv
);
1318 case AUDIOD_STANDBY
:
1319 return com_off(fd
, argc
, argv
);
1326 static int check_perms(uid_t uid
)
1330 if (!conf
.user_allow_given
)
1332 for (i
= 0; i
< conf
.user_allow_given
; i
++)
1333 if (uid
== conf
.user_allow_arg
[i
])
1335 return -E_UCRED_PERM
;
1338 static int handle_connect(void)
1340 int i
, argc
, ret
, clifd
= -1;
1341 char *cmd
= NULL
, *p
, *buf
= para_calloc(MAXLINE
), **argv
= NULL
;
1342 struct sockaddr_un unix_addr
;
1344 ret
= para_accept(cmd_task
->fd
, &unix_addr
, sizeof(struct sockaddr_un
));
1348 ret
= recv_cred_buffer(clifd
, buf
, MAXLINE
- 1);
1351 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret
, buf
);
1352 ret
= check_perms(ret
);
1355 ret
= -E_INVALID_AUDIOD_CMD
;
1356 cmd
= para_strdup(buf
);
1357 p
= strchr(cmd
, '\n');
1364 for (i
= 0; cmds
[i
].name
; i
++) {
1366 if (strcmp(cmds
[i
].name
, cmd
))
1368 if (cmds
[i
].handler
) {
1369 argc
= split_args(buf
, &argv
, "\n");
1370 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv
[0], argc
);
1371 ret
= cmds
[i
].handler(clifd
, argc
, argv
);
1374 for (j
= 0; p
[j
]; j
++)
1377 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd
, p
);
1378 ret
= cmds
[i
].line_handler(clifd
, p
);
1381 ret
= -E_INVALID_AUDIOD_CMD
; /* cmd not found */
1386 if (clifd
> 0 && ret
< 0 && ret
!= -E_CLIENT_WRITE
) {
1387 char *tmp
= make_message("%s\n", PARA_STRERROR(-ret
));
1388 client_write(clifd
, tmp
);
1395 static void audiod_get_socket(void)
1397 struct sockaddr_un unix_addr
;
1399 if (conf
.socket_given
)
1400 socket_name
= para_strdup(conf
.socket_arg
);
1402 char *hn
= para_hostname();
1403 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
1407 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name
);
1408 if (conf
.force_given
)
1409 unlink(socket_name
);
1410 cmd_task
->fd
= create_pf_socket(socket_name
, &unix_addr
,
1411 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
1412 if (cmd_task
->fd
< 0) {
1413 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1414 exit(EXIT_FAILURE
); /* do not unlink socket */
1416 if (listen(cmd_task
->fd
, 5) < 0) {
1417 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1418 exit(EXIT_FAILURE
); /* do not unlink socket */
1420 add_close_on_fork_list(cmd_task
->fd
);
1423 static int open_stat_pipe(void)
1425 int ret
, fd
[3] = {-1, 1, 0};
1427 ret
= para_exec_cmdline_pid(&pid
, BINDIR
"/para_client stat", fd
);
1430 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret
);
1431 add_close_on_fork_list(ret
);
1433 clean_exit(EXIT_FAILURE
, "failed to open status pipe");
1437 void signal_event_handler(struct task
*t
)
1439 struct signal_task
*st
= t
->private_data
;
1440 handle_signal(st
->signum
);
1443 void signal_pre_select(struct sched
*s
, struct task
*t
)
1445 struct signal_task
*st
= t
->private_data
;
1447 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
1450 void signal_post_select(struct sched
*s
, struct task
*t
)
1452 struct signal_task
*st
= t
->private_data
;
1454 if (!FD_ISSET(st
->fd
, &s
->rfds
))
1456 t
->ret
= -E_SIGNAL_CAUGHT
;
1457 st
->signum
= para_next_signal();
1460 void signal_setup_default(struct signal_task
*st
)
1462 st
->task
.pre_select
= signal_pre_select
;
1463 st
->task
.post_select
= signal_post_select
;
1464 st
->task
.private_data
= st
;
1466 sprintf(st
->task
.status
, "signal task");
1469 static void command_pre_select(struct sched
*s
, struct task
*t
)
1471 struct command_task
*ct
= t
->private_data
;
1472 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
1476 static void command_post_select(struct sched
*s
, struct task
*t
)
1479 struct command_task
*ct
= t
->private_data
;
1481 if (audiod_status
!= AUDIOD_OFF
)
1482 audiod_status_dump();
1483 t
->ret
= 1; /* always successful */
1484 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
1486 ret
= handle_connect();
1488 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
1491 static void init_command_task(struct command_task
*ct
)
1493 ct
->task
.pre_select
= command_pre_select
;
1494 ct
->task
.post_select
= command_post_select
;
1495 ct
->task
.private_data
= ct
;
1497 sprintf(ct
->task
.status
, "command task");
1500 static void status_pre_select(struct sched
*s
, struct task
*t
)
1502 struct status_task
*st
= t
->private_data
;
1504 if (st
->fd
>= 0 && audiod_status
== AUDIOD_OFF
)
1506 if (st
->fd
< 0 && audiod_status
!= AUDIOD_OFF
) {
1507 st
->fd
= open_stat_pipe();
1511 if (st
->fd
>= 0 && audiod_status
!= AUDIOD_OFF
)
1512 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
1515 static void status_post_select(struct sched
*s
, struct task
*t
)
1517 struct status_task
*st
= t
->private_data
;
1521 if (st
->fd
< 0 || !FD_ISSET(st
->fd
, &s
->rfds
))
1523 ret
= read(st
->fd
, st
->buf
+ st
->loaded
,
1524 STRINGSIZE
- 1 - st
->loaded
);
1527 /* avoid busy loop if server is down */
1528 while (sleep(1) > 0) /* FIXME */
1531 st
->buf
[ret
+ st
->loaded
] = '\0';
1532 st
->loaded
= for_each_line(st
->buf
, ret
+ st
->loaded
,
1537 static void init_status_task(struct status_task
*st
)
1539 st
->task
.pre_select
= status_pre_select
;
1540 st
->task
.post_select
= status_post_select
;
1541 st
->task
.private_data
= st
;
1546 sprintf(st
->task
.status
, "status task");
1549 static void set_initial_status(void)
1551 audiod_status
= AUDIOD_ON
;
1552 if (!conf
.mode_given
)
1554 if (!strcmp(conf
.mode_arg
, "sb")) {
1555 audiod_status
= AUDIOD_STANDBY
;
1558 if (!strcmp(conf
.mode_arg
, "off")) {
1559 audiod_status
= AUDIOD_OFF
;
1562 if (strcmp(conf
.mode_arg
, "on"))
1563 PARA_WARNING_LOG("%s", "invalid mode\n");
1566 int main(int argc
, char *argv
[])
1575 hostname
= para_hostname();
1576 cmdline_parser(argc
, argv
, &conf
);
1577 para_drop_privileges(conf
.user_arg
, conf
.group_arg
);
1578 cf
= configfile_exists();
1580 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0)) {
1581 PARA_EMERG_LOG("%s", "parse error in config file\n");
1585 if (conf
.logfile_given
)
1586 logfile
= open_log(conf
.logfile_arg
);
1587 log_welcome("para_audiod", conf
.loglevel_arg
);
1588 i
= init_stream_io();
1590 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i
));
1593 server_uptime(UPTIME_SET
);
1594 set_initial_status();
1598 setup_signal_handling();
1599 if (conf
.daemon_given
)
1601 audiod_get_socket(); /* doesn't return on errors */
1603 signal_setup_default(sig_task
);
1604 sig_task
->task
.event_handler
= signal_event_handler
;
1606 init_status_task(stat_task
);
1607 init_command_task(cmd_task
);
1608 init_audiod_task(at
);
1610 register_task(&sig_task
->task
);
1611 register_task(&cmd_task
->task
);
1612 register_task(&stat_task
->task
);
1613 register_task(&at
->task
);
1614 s
.default_timeout
.tv_sec
= 0;
1615 s
.default_timeout
.tv_usec
= 99 * 1000;
1618 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
1619 return EXIT_FAILURE
;