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"
39 /** define the array of error lists needed by para_audiod */
41 /** define the array containing all supported audio formats */
42 DEFINE_AUDIO_FORMAT_ARRAY
;
45 * the possible modes of operation
47 * - off: disconnect from para_server
48 * - on: receive status information from para_server and play the audio stream
49 * - sb: only receive status information but not the audio stream
51 enum {AUDIOD_OFF
, AUDIOD_ON
, AUDIOD_STANDBY
};
53 /** defines how to handle one supported audio format */
54 struct audio_format_info
{
55 /** pointer to the receiver for this audio format */
56 struct receiver
*receiver
;
57 /** the receiver configuration */
59 /** the number of filters that should be activated for this audio format */
60 unsigned int num_filters
;
61 /** pointer to the array of filters to be activated */
62 struct filter
**filters
;
63 /** pointer to the array of filter configurations */
65 /** output of the last filter is written to stdin of this command */
67 /** do not start receiver/filters/writer before this time */
68 struct timeval restart_barrier
;
72 * describes one instance of a receiver-filter-writer chain
74 * \sa receier_node, receiver, filter, filter_node, filter_chain_info
77 /** number of the audio format in this slot */
79 /** the file descriptor of the writer */
81 /** the process id of the writer */
83 /** time of the last successful read from the receiver */
85 /** time the last write to the write fd happend */
87 /** writer start time */
88 struct timeval wstime
;
89 /** did we include \a write_fd in the fdset */
91 /** set to one if we have sent the TERM signal to \a wpid */
93 /** the receiver info associated with this slot */
94 struct receiver_node
*receiver_node
;
95 /** the active filter chain */
96 struct filter_chain_info
*fci
;
99 static struct slot_info slot
[MAX_STREAM_SLOTS
];
101 /** defines one command of para_audiod */
102 struct audiod_command
{
103 /** the name of the command */
105 /** pointer to the function that handles the command */
106 int (*handler
)(int, int, char**);
107 /** one-line description of the command */
108 const char *description
;
109 /** summary of the command line options */
110 const char *synopsis
;
111 /** the long help text */
115 extern const char *status_item_list
[NUM_STAT_ITEMS
];
117 static int com_grab(int, int, char **);
118 static int com_cycle(int, int, char **);
119 static int com_help(int, int, char **);
120 static int com_off(int, int, char **);
121 static int com_on(int, int, char **);
122 static int com_sb(int, int, char **);
123 static int com_stat(int, int, char **);
124 static int com_term(int, int, char **);
125 static int stat_pipe
= -1, signal_pipe
;
127 static struct gengetopt_args_info conf
;
128 static struct timeval server_stream_start
, sa_time_diff
;
129 static int playing
, current_decoder
= -1,
130 audiod_status
= AUDIOD_ON
, offset_seconds
, length_seconds
,
131 sa_time_diff_sign
= 1, audiod_socket
= -1;
132 static char *af_status
, /* the audio format announced in server status */
133 *socket_name
, *hostname
;
134 static char *stat_item_values
[NUM_STAT_ITEMS
];
135 static FILE *logfile
;
136 static const struct timeval restart_delay
= {0, 300 * 1000};
138 static struct audio_format_info afi
[NUM_AUDIO_FORMATS
];
140 static struct audiod_command cmds
[] = {
143 .handler
= com_cycle
,
144 .description
= "switch to next mode",
148 "on -> standby -> off -> on\n"
154 .description
= "grab the audio stream",
155 .synopsis
= "-- grab [grab_options]",
158 "grab ('splice') the audio stream at any position in the filter \n"
159 "chain and send that data back to the client. Try\n"
160 "\t para_audioc -- grab -h\n"
161 "for the list of available options.\n"
167 .description
= "display command list or help for given command",
168 .synopsis
= "help [command]",
171 "When I was younger, so much younger than today, I never needed\n"
172 "anybody's help in any way. But now these days are gone, I'm not so\n"
173 "self assured. Now I find I've changed my mind and opened up the doors.\n"
175 " -- Beatles: Help\n"
181 .description
= "deactivate para_audiod",
185 "Close connection to para_server and stop all decoders.\n"
191 .description
= "activate para_audiod",
195 "Establish connection to para_server, retrieve para_server's current\n"
196 "status. If playing, start corresponding decoder. Otherwise stop\n"
203 .description
= "enter standby mode",
207 "Stop all decoders but leave connection to para_server open.\n"
213 .description
= "print status information",
214 .synopsis
= "stat [item1 ...]",
217 "Dump given status items (all if none given) to stdout.\n"
223 .description
= "terminate audiod",
227 "Stop all decoders, shut down connection to para_server and exit.\n"
235 /** iterate over all slots */
236 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
237 /** iterate over all supported audio formats */
238 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
239 /** iterate over the array of all audiod commands */
240 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
243 * get the audio format number
244 * \param name the name of the audio format
246 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
247 * \a name is not a supported audio format.
249 int get_audio_format_num(char *name
)
252 FOR_EACH_AUDIO_FORMAT(i
)
253 if (!strcmp(name
, audio_formats
[i
]))
255 return -E_UNSUPPORTED_AUDIO_FORMAT
;
259 * log function. first argument is loglevel.
261 void para_log(int ll
, const char* fmt
,...)
267 char str
[MAXLINE
] = "";
269 if (ll
< conf
.loglevel_arg
)
271 outfd
= logfile
? logfile
: stderr
;
274 strftime(str
, MAXLINE
, "%b %d %H:%M:%S", tm
);
275 fprintf(outfd
, "%s %s ", str
, hostname
);
276 if (conf
.loglevel_arg
<= INFO
)
277 fprintf(outfd
, "%i ", ll
);
279 vfprintf(outfd
, fmt
, argp
);
283 static int client_write(int fd
, const char *buf
)
285 size_t len
= strlen(buf
);
286 return write(fd
, buf
, len
) != len
? -E_CLIENT_WRITE
: 1;
289 static char *get_time_string(struct timeval
*newest_stime
)
291 struct timeval now
, diff
, adj_stream_start
, tmp
;
292 int total
= 0, use_server_time
= 1;
297 return make_message("%s:\n", status_item_list
[SI_PLAY_TIME
]);
299 if (audiod_status
== AUDIOD_OFF
)
301 if (sa_time_diff_sign
> 0)
302 tv_diff(&server_stream_start
, &sa_time_diff
,
305 tv_add(&server_stream_start
, &sa_time_diff
,
307 tmp
= adj_stream_start
;
308 if (newest_stime
&& audiod_status
== AUDIOD_ON
) {
309 tv_diff(newest_stime
, &adj_stream_start
, &diff
);
310 if (tv2ms(&diff
) < 5000) {
315 gettimeofday(&now
, NULL
);
316 tv_diff(&now
, &tmp
, &diff
);
317 total
= diff
.tv_sec
+ offset_seconds
;
318 if (total
> length_seconds
)
319 total
= length_seconds
;
324 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
325 status_item_list
[SI_PLAY_TIME
],
326 use_server_time
? "~" : "",
329 (length_seconds
- total
) / 60,
330 (length_seconds
- total
) % 60,
331 length_seconds
? (total
* 100 + length_seconds
/ 2) /
338 __malloc
static char *audiod_status_string(void)
340 const char *status
= (audiod_status
== AUDIOD_ON
)?
341 "on" : (audiod_status
== AUDIOD_OFF
)? "off": "sb";
342 return make_message("%s:%s\n", status_item_list
[SI_AUDIOD_STATUS
], status
);
345 static struct timeval
*wstime(void)
348 struct timeval
*max
= NULL
;
350 struct slot_info
*s
= &slot
[i
];
353 if (max
&& tv_diff(&s
->wstime
, max
, NULL
) <= 0)
359 __malloc
static char *decoder_flags(void)
362 char decoder_flags
[MAX_STREAM_SLOTS
+ 1];
365 struct slot_info
*s
= &slot
[i
];
367 if (s
->receiver_node
)
371 decoder_flags
[i
] = flag
;
373 decoder_flags
[MAX_STREAM_SLOTS
] = '\0';
374 return make_message("%s:%s\n", status_item_list
[SI_DECODER_FLAGS
],
378 static char *configfile_exists(void)
380 static char *config_file
;
383 char *home
= para_homedir();
384 config_file
= make_message("%s/.paraslash/audiod.conf", home
);
387 return file_exists(config_file
)? config_file
: NULL
;
390 static void setup_signal_handling(void)
392 signal_pipe
= para_signal_init();
393 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe
);
394 para_install_sighandler(SIGINT
);
395 para_install_sighandler(SIGTERM
);
396 para_install_sighandler(SIGCHLD
);
397 para_install_sighandler(SIGHUP
);
398 signal(SIGPIPE
, SIG_IGN
);
401 static void audiod_status_dump(void)
403 static char *p_ts
, *p_us
, *p_as
, *p_df
;
404 struct timeval
*t
= wstime();
405 char *us
, *tmp
= get_time_string(t
);
407 if (tmp
&& (!p_ts
|| strcmp(tmp
, p_ts
)))
408 stat_client_write(tmp
, SI_PLAY_TIME
);
413 tmp
= make_message("%s:%s\n", status_item_list
[SI_AUDIOD_UPTIME
], us
);
415 if (!p_us
|| strcmp(p_us
, tmp
))
416 stat_client_write(tmp
, SI_AUDIOD_UPTIME
);
420 tmp
= audiod_status_string();
421 if (!p_as
|| strcmp(p_as
, tmp
))
422 stat_client_write(tmp
, SI_AUDIOD_STATUS
);
426 tmp
= decoder_flags();
427 if (!p_df
|| strcmp(p_df
, tmp
))
428 stat_client_write(tmp
, SI_DECODER_FLAGS
);
433 static void clear_slot(int slot_num
)
435 struct slot_info
*s
= &slot
[slot_num
];
437 PARA_INFO_LOG("clearing slot %d\n", slot_num
);
438 memset(s
, 0, sizeof(struct slot_info
));
442 static void kill_stream_writer(int slot_num
)
444 struct slot_info
*s
= &slot
[slot_num
];
446 if (s
->format
< 0 || s
->wkilled
|| s
->wpid
<= 0)
448 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
449 s
->wpid
, audio_formats
[s
->format
], slot_num
);
450 kill(s
->wpid
, SIGTERM
);
455 static void set_restart_barrier(int format
, struct timeval
*now
)
462 gettimeofday(&tmp
, NULL
);
463 tv_add(&tmp
, &restart_delay
, &afi
[format
].restart_barrier
);
466 static void close_receiver(int slot_num
)
468 struct slot_info
*s
= &slot
[slot_num
];
469 struct audio_format_info
*a
;
471 if (s
->format
< 0 || !s
->receiver_node
)
474 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
475 audio_formats
[s
->format
] , slot_num
);
476 a
->receiver
->close(s
->receiver_node
);
477 free(s
->receiver_node
);
478 s
->receiver_node
= NULL
;
479 set_restart_barrier(s
->format
, NULL
);
482 static void kill_all_decoders(void)
487 if (slot
[i
].format
>= 0) {
488 PARA_INFO_LOG("stopping decoder in slot %d\n", i
);
489 kill_stream_writer(i
);
493 static void check_sigchld(void)
498 gettimeofday(&now
, NULL
);
501 pid
= para_reap_child();
505 struct slot_info
*s
= &slot
[i
];
509 if (pid
== s
->wpid
) {
511 lifetime
= now
.tv_sec
- s
->wstime
.tv_sec
;
512 PARA_INFO_LOG("%s stream writer in slot %d died "
514 audio_formats
[s
->format
], i
, lifetime
);
515 set_restart_barrier(s
->format
, &now
);
516 goto reap_next_child
;
519 PARA_CRIT_LOG("para_client died (pid %d)\n", pid
);
520 goto reap_next_child
;
523 static int get_empty_slot(void)
534 if (s
->write_fd
> 0 || s
->wpid
> 0)
536 if (s
->receiver_node
)
543 return -E_NO_MORE_SLOTS
;
546 static int decoder_running(int format
)
553 if (s
->format
== format
&& s
->receiver_node
)
555 if (s
->format
== format
&& s
->wpid
> 0)
561 static void close_stat_pipe(void)
567 PARA_NOTICE_LOG("%s", "closing status pipe\n");
569 del_close_on_fork_list(stat_pipe
);
572 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
573 free(stat_item_values
[i
]);
574 stat_item_values
[i
] = NULL
;
579 audiod_status_dump();
581 stat_item_values
[SI_STATUS_BAR
] = make_message("%s:no connection to para_server\n",
582 status_item_list
[SI_STATUS_BAR
]);
583 stat_client_write(stat_item_values
[SI_STATUS_BAR
], SI_STATUS_BAR
);
586 static void __noreturn
clean_exit(int status
, const char *msg
)
588 PARA_EMERG_LOG("%s\n", msg
);
597 __malloc
static char *glob_cmd(char *cmd
)
599 char *ret
, *replacement
;
600 struct timeval tmp
, delay
, rss
; /* real stream start */
602 delay
.tv_sec
= conf
.stream_delay_arg
/ 1000;
603 delay
.tv_usec
= (conf
.stream_delay_arg
% 1000) * 1000;
604 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
605 if (sa_time_diff_sign
< 0)
606 tv_add(&server_stream_start
, &sa_time_diff
, &rss
);
608 tv_diff(&server_stream_start
, &sa_time_diff
, &rss
);
609 tv_add(&rss
, &delay
, &tmp
);
610 replacement
= make_message("%lu:%lu",
611 (long unsigned)tmp
.tv_sec
,
612 (long unsigned)tmp
.tv_usec
);
613 ret
= s_a_r(cmd
, "STREAM_START", replacement
);
617 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd
, ret
);
622 /** get the number of filters for the given audio format */
623 int num_filters(int audio_format_num
)
625 return afi
[audio_format_num
].num_filters
;
628 static void open_filters(int slot_num
)
630 struct slot_info
*s
= &slot
[slot_num
];
631 struct audio_format_info
*a
= &afi
[s
->format
];
632 int nf
= a
->num_filters
;
635 s
->fci
= para_calloc(sizeof(struct filter_chain_info
));
636 INIT_LIST_HEAD(&s
->fci
->filters
);
639 s
->fci
->inbuf
= s
->receiver_node
->buf
;
640 s
->fci
->in_loaded
= &s
->receiver_node
->loaded
;
641 s
->fci
->outbuf
= s
->receiver_node
->buf
;
642 s
->fci
->out_loaded
= &s
->receiver_node
->loaded
;
643 s
->fci
->eof
= &s
->receiver_node
->eof
;
644 for (i
= 0; i
< nf
; i
++) {
645 struct filter_node
*fn
= para_calloc(sizeof(struct filter_node
));
646 fn
->conf
= a
->filter_conf
[i
];
648 fn
->filter
= a
->filters
[i
];
649 INIT_LIST_HEAD(&fn
->callbacks
);
650 list_add_tail(&fn
->node
, &s
->fci
->filters
);
651 fn
->filter
->open(fn
);
652 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
653 audio_formats
[s
->format
], i
+ 1, nf
,
654 fn
->filter
->name
, slot_num
);
655 s
->fci
->outbuf
= fn
->buf
;
656 s
->fci
->out_loaded
= &fn
->loaded
;
658 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s
->fci
,
662 static struct filter_node
*find_filter_node(int slot_num
, int format
, int filternum
)
664 struct filter_node
*fn
;
668 struct slot_info
*s
= &slot
[i
];
669 if (s
->format
< 0 || !s
->fci
)
671 if (slot_num
>= 0 && slot_num
!= i
)
673 if (format
>= 0 && s
->format
!= format
)
675 if (num_filters(i
) < filternum
)
679 list_for_each_entry(fn
, &s
->fci
->filters
, node
)
680 if (filternum
<= 0 || j
++ == filternum
)
687 static void start_stream_writer(int slot_num
)
689 int ret
, fds
[3] = {1, -1, -1};
690 struct slot_info
*s
= &slot
[slot_num
];
691 struct audio_format_info
*a
= &afi
[s
->format
];
695 glob
= glob_cmd(a
->write_cmd
);
697 glob
= para_strdup("para_write -w alsa");
698 PARA_INFO_LOG("starting stream writer: %s\n", glob
);
699 open_filters(slot_num
);
700 ret
= para_exec_cmdline_pid(&s
->wpid
, glob
, fds
);
703 PARA_ERROR_LOG("exec failed (%d)\n", ret
);
706 s
->write_fd
= fds
[0];
707 add_close_on_fork_list(s
->write_fd
);
708 /* we write to this fd in do_select, so we need non-blocking */
709 mark_fd_nonblock(s
->write_fd
);
710 gettimeofday(&s
->wstime
, NULL
);
711 current_decoder
= slot_num
;
712 activate_inactive_grab_clients(slot_num
, s
->format
, &s
->fci
->filters
);
715 static void open_receiver(int format
)
717 struct audio_format_info
*a
= &afi
[format
];
721 slot_num
= get_empty_slot();
723 clean_exit(EXIT_FAILURE
, PARA_STRERROR(-slot_num
));
726 gettimeofday(&s
->rtime
, NULL
);
728 s
->receiver_node
= para_calloc(sizeof(struct receiver_node
));
729 s
->receiver_node
->conf
= a
->receiver_conf
;
730 ret
= a
->receiver
->open(s
->receiver_node
);
732 PARA_ERROR_LOG("failed to open receiver (%s)\n",
733 PARA_STRERROR(-ret
));
734 free(s
->receiver_node
);
735 s
->receiver_node
= NULL
;
738 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
739 audio_formats
[s
->format
], a
->receiver
->name
, slot_num
);
742 static int is_frozen(int format
)
745 struct audio_format_info
*a
= &afi
[format
];
747 gettimeofday(&now
, NULL
);
748 return (tv_diff(&now
, &a
->restart_barrier
, NULL
) > 0)? 0 : 1;
751 static void start_current_receiver(void)
757 i
= get_audio_format_num(af_status
);
760 if ((decoder_running(i
) & 1) || is_frozen(i
))
765 static void compute_time_diff(const struct timeval
*status_time
)
767 struct timeval now
, tmp
, diff
;
770 const struct timeval max_deviation
= {0, 500 * 1000};
771 const int time_smooth
= 5;
773 gettimeofday(&now
, NULL
);
774 sign
= tv_diff(status_time
, &now
, &diff
);
775 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
776 // sign, sa_time_diff_sign);
778 sa_time_diff_sign
= sign
;
784 int s
= tv_diff(&diff
, &sa_time_diff
, &tmp
);
785 if (tv_diff(&max_deviation
, &tmp
, NULL
) < 0)
786 PARA_WARNING_LOG("time diff jump: %lims\n",
790 sa_time_diff_sign
= tv_convex_combination(
791 sa_time_diff_sign
* time_smooth
, &sa_time_diff
,
792 count
> 10? sign
: sign
* time_smooth
, &diff
,
795 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
798 sa_time_diff_sign
? "+" : "-",
803 static void check_stat_line(char *line
)
807 long unsigned sec
, usec
;
810 // PARA_INFO_LOG("line: %s\n", line);
813 itemnum
= stat_line_valid(line
);
815 PARA_WARNING_LOG("invalid status line: %s\n", line
);
818 tmp
= make_message("%s\n", line
);
819 stat_client_write(tmp
, itemnum
);
821 free(stat_item_values
[itemnum
]);
822 stat_item_values
[itemnum
] = para_strdup(line
);
823 ilen
= strlen(status_item_list
[itemnum
]);
826 playing
= strstr(line
, "playing")? 1 : 0;
830 af_status
= para_strdup(line
+ ilen
+ 1);
833 offset_seconds
= atoi(line
+ ilen
+ 1);
836 length_seconds
= atoi(line
+ ilen
+ 1);
838 case SI_STREAM_START
:
839 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
840 server_stream_start
.tv_sec
= sec
;
841 server_stream_start
.tv_usec
= usec
;
844 case SI_CURRENT_TIME
:
845 if (sscanf(line
+ ilen
+ 1, "%lu.%lu", &sec
, &usec
) == 2) {
846 struct timeval tv
= {sec
, usec
};
847 compute_time_diff(&tv
);
853 static void handle_signal(int sig
)
857 return check_sigchld();
861 PARA_EMERG_LOG("terminating on signal %d\n", sig
);
862 clean_exit(EXIT_FAILURE
, "caught deadly signal");
867 static void check_timeouts(void)
870 int slot_num
, timeout
= conf
.stream_timeout_arg
;
872 gettimeofday(&now
, NULL
);
873 FOR_EACH_SLOT(slot_num
) {
874 struct slot_info
*s
= &slot
[slot_num
];
877 /* check read time */
878 if (s
->receiver_node
&&
879 now
.tv_sec
> s
->rtime
.tv_sec
+ timeout
) {
880 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
881 audio_formats
[s
->format
], slot_num
);
885 close_receiver(slot_num
);
887 /* check write time */
888 if (s
->wpid
> 0 && !s
->wkilled
&&
889 now
.tv_sec
> s
->wtime
.tv_sec
+ timeout
) {
890 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
891 audio_formats
[s
->format
], slot_num
);
898 static size_t get_loaded_bytes(int slot_num
)
901 struct slot_info
*s
= &slot
[slot_num
];
902 struct receiver_node
*rn
= s
->receiver_node
;
907 if (afi
[s
->format
].num_filters
) {
909 loaded
= *s
->fci
->out_loaded
;
919 static void close_decoder_if_idle(int slot_num
)
921 struct slot_info
*s
= &slot
[slot_num
];
922 struct receiver_node
*rn
= s
->receiver_node
;
928 if (!rn
->eof
&& !s
->fci
->error
&& s
->wpid
> 0)
930 if (!s
->fci
->error
&& s
->wpid
> 0) { /* eof */
931 if (filter_io(s
->fci
) > 0)
933 if (get_loaded_bytes(slot_num
))
936 if (s
->write_fd
> 0) {
937 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num
,
940 del_close_on_fork_list(s
->write_fd
);
944 return; /* wait until writer dies before closing filters */
945 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
947 close_filters(s
->fci
);
949 close_receiver(slot_num
);
950 clear_slot(slot_num
);
953 static void set_stream_fds(fd_set
*wfds
, int *max_fileno
)
959 struct slot_info
*s
= &slot
[i
];
960 struct audio_format_info
*a
;
961 struct receiver_node
*rn
;
963 close_decoder_if_idle(i
);
968 rn
= s
->receiver_node
;
969 if (rn
&& rn
->loaded
&& !s
->wpid
) {
970 PARA_INFO_LOG("no writer in slot %d\n", i
);
971 start_stream_writer(i
);
973 if (s
->write_fd
<= 0)
975 if (!get_loaded_bytes(i
))
977 para_fd_set(s
->write_fd
, wfds
, max_fileno
);
982 static int write_audio_data(int slot_num
)
984 struct slot_info
*s
= &slot
[slot_num
];
985 struct audio_format_info
*a
= &afi
[s
->format
];
986 struct receiver_node
*rn
= s
->receiver_node
;
991 if (a
->num_filters
) {
992 buf
= &s
->fci
->outbuf
;
993 len
= s
->fci
->out_loaded
;
998 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf
, *len
);
999 rv
= write(s
->write_fd
, *buf
, *len
);
1000 PARA_DEBUG_LOG("wrote %d/%zd\n", rv
, *len
);
1002 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
1003 slot_num
, s
->write_fd
, strerror(errno
));
1005 s
->fci
->error
= E_WRITE_AUDIO_DATA
;
1006 } else if (rv
!= *len
) {
1007 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
1008 audio_formats
[s
->format
], rv
, *len
, slot_num
);
1010 memmove(*buf
, *buf
+ rv
, *len
);
1014 gettimeofday(&s
->wtime
, NULL
);
1018 static void slot_io(fd_set
*wfds
)
1023 struct slot_info
*s
= &slot
[i
];
1024 struct receiver_node
*rn
= s
->receiver_node
;
1026 if (rn
&& rn
->loaded
)
1027 gettimeofday(&s
->rtime
, NULL
);
1028 if (s
->format
>= 0 && s
->write_fd
> 0 && s
->fci
) {
1029 ret
= filter_io(s
->fci
);
1031 s
->fci
->error
= -ret
;
1032 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1033 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1035 if (s
->write_fd
<= 0 || !s
->wcheck
|| !FD_ISSET(s
->write_fd
, wfds
))
1037 write_audio_data(i
);
1041 static int parse_stream_command(const char *txt
, char **cmd
)
1043 char *p
= strchr(txt
, ':');
1047 return -E_MISSING_COLON
;
1049 FOR_EACH_AUDIO_FORMAT(i
) {
1050 if (strncmp(txt
, audio_formats
[i
], strlen(audio_formats
[i
])))
1055 return -E_UNSUPPORTED_AUDIO_FORMAT
;
1058 static int add_filter(int format
, char *cmdline
)
1060 struct audio_format_info
*a
= &afi
[format
];
1061 int filter_num
, nf
= a
->num_filters
;
1063 filter_num
= check_filter_arg(cmdline
, &a
->filter_conf
[nf
]);
1066 a
->filters
[nf
] = &filters
[filter_num
];
1068 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats
[format
], nf
+ 1,
1069 a
->filters
[nf
]->name
);
1073 static int setup_default_filters(void)
1077 FOR_EACH_AUDIO_FORMAT(i
) {
1078 struct audio_format_info
*a
= &afi
[i
];
1083 /* add "dec" to audio format name */
1084 tmp
= make_message("%sdec", audio_formats
[i
]);
1085 for (j
= 0; filters
[j
].name
; j
++)
1086 if (!strcmp(tmp
, filters
[j
].name
))
1089 ret
= -E_UNSUPPORTED_FILTER
;
1090 if (!filters
[j
].name
)
1092 tmp
= para_strdup(filters
[j
].name
);
1093 ret
= add_filter(i
, tmp
);
1097 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats
[i
],
1099 ret
= add_filter(i
, "wav");
1102 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats
[i
]);
1108 static int init_stream_io(void)
1110 int i
, ret
, receiver_num
, nf
;
1113 for (i
= 0; i
< conf
.stream_write_cmd_given
; i
++) {
1114 ret
= parse_stream_command(conf
.stream_write_cmd_arg
[i
], &cmd
);
1117 afi
[ret
].write_cmd
= para_strdup(cmd
);
1118 PARA_INFO_LOG("%s write command: %s\n", audio_formats
[ret
], afi
[ret
].write_cmd
);
1120 for (i
= 0; receivers
[i
].name
; i
++) {
1121 PARA_INFO_LOG("initializing %s receiver\n", receivers
[i
].name
);
1122 receivers
[i
].init(&receivers
[i
]);
1124 for (i
= 0; i
< conf
.receiver_given
; i
++) {
1125 char *arg
= conf
.receiver_arg
[i
];
1126 char *recv
= strchr(arg
, ':');
1127 ret
= -E_MISSING_COLON
;
1132 ret
= get_audio_format_num(arg
);
1135 afi
[ret
].receiver_conf
= check_receiver_arg(recv
, &receiver_num
);
1136 if (!afi
[ret
].receiver_conf
) {
1137 ret
= -E_RECV_SYNTAX
;
1140 afi
[ret
].receiver
= &receivers
[receiver_num
];
1142 /* use the first available receiver with no arguments
1143 * for those audio formats for which no receiver
1146 cmd
= para_strdup(receivers
[0].name
);
1147 FOR_EACH_AUDIO_FORMAT(i
) {
1148 struct audio_format_info
*a
= &afi
[i
];
1149 if (a
->receiver_conf
)
1151 a
->receiver_conf
= check_receiver_arg(cmd
, &receiver_num
);
1152 if (!a
->receiver_conf
)
1153 return -E_RECV_SYNTAX
;
1154 a
->receiver
= &receivers
[receiver_num
];
1158 filter_init(filters
);
1159 nf
= PARA_MAX(2, conf
.filter_given
) + 1;
1160 PARA_INFO_LOG("allocating space for %d filters\n", nf
);
1161 FOR_EACH_AUDIO_FORMAT(i
) {
1162 afi
[i
].filter_conf
= para_malloc(nf
* sizeof(char *));
1163 afi
[i
].filters
= para_malloc(nf
* sizeof(struct filter
*));
1165 if (!conf
.no_default_filters_given
)
1166 return setup_default_filters();
1167 for (i
= 0; i
< conf
.filter_given
; i
++) {
1168 char *arg
= conf
.filter_arg
[i
];
1169 char *filter_name
= strchr(arg
, ':');
1170 ret
= -E_MISSING_COLON
;
1173 *filter_name
= '\0';
1175 ret
= get_audio_format_num(arg
);
1178 ret
= add_filter(ret
, filter_name
);
1187 static int dump_commands(int fd
)
1189 char *buf
= para_strdup(""), *tmp
= NULL
;
1193 FOR_EACH_COMMAND(i
) {
1194 tmp
= make_message("%s%s\t%s\n", buf
, cmds
[i
].name
,
1195 cmds
[i
].description
);
1199 ret
= client_write(fd
, buf
);
1205 * command handlers don't close their fd on errors (ret < 0) so that
1206 * its caller can send an error message. Otherwise (ret >= 0) it's up
1207 * to each individual command to close the fd if necessary.
1210 static int com_help(int fd
, int argc
, char **argv
)
1214 const char *dflt
= "No such command. Available commands:\n";
1217 ret
= dump_commands(fd
);
1220 FOR_EACH_COMMAND(i
) {
1221 if (strcmp(cmds
[i
].name
, argv
[1]))
1224 "NAME\n\t%s -- %s\n"
1225 "SYNOPSIS\n\tpara_audioc %s\n"
1226 "DESCRIPTION\n%s\n",
1228 cmds
[i
].description
,
1232 ret
= client_write(fd
, buf
);
1236 ret
= client_write(fd
, dflt
);
1238 ret
= dump_commands(fd
);
1245 static int com_stat(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1249 long unsigned mask
= ~0LU;
1253 for (i
= 1; i
< argc
; i
++) {
1254 ret
= stat_item_valid(argv
[i
]);
1260 PARA_INFO_LOG("mask: 0x%lx\n", mask
);
1261 if (mask
& (1 << SI_PLAY_TIME
)) {
1262 struct timeval
*t
= wstime();
1263 char *ts
= get_time_string(t
);
1265 ret
= client_write(fd
, ts
);
1271 if (mask
& (1 << SI_AUDIOD_UPTIME
)) {
1272 char *tmp
, *us
= uptime_str();
1273 tmp
= make_message("%s:%s\n",
1274 status_item_list
[SI_AUDIOD_UPTIME
], us
);
1276 ret
= client_write(fd
, tmp
);
1281 if (mask
& (1 << SI_AUDIOD_STATUS
)) {
1282 char *s
= audiod_status_string();
1283 ret
= client_write(fd
, s
);
1288 if (mask
& (1 << SI_DECODER_FLAGS
)) {
1289 char *df
=decoder_flags();
1290 ret
= client_write(fd
, df
);
1296 for (i
= 0; i
< NUM_STAT_ITEMS
; i
++) {
1298 if (!((1 << i
) & mask
))
1300 v
= stat_item_values
[i
];
1301 tmp
= make_message("%s%s%s", buf
? buf
: "",
1302 v
? v
: "", v
? "\n" : "");
1306 ret
= client_write(fd
, buf
);
1309 ret
= stat_client_add(fd
, mask
);
1315 static char *list_filters(void)
1318 char *tmp
, *msg
= make_message("format\tnum\tcmd\n");
1320 FOR_EACH_AUDIO_FORMAT(i
) {
1321 for (j
= 0; j
< afi
[i
].num_filters
; j
++) {
1322 tmp
= make_message("%s\t%i\t%s\n",
1323 afi
[i
].name
, j
, afi
[i
].filter_cmds
[j
]);
1324 msg
= para_strcat(msg
, tmp
);
1327 tmp
= make_message("%s\t%i\t%s\n", afi
[i
].name
,
1328 j
, afi
[i
].write_cmd
);
1329 msg
= para_strcat(msg
, tmp
);
1336 static int com_grab(int fd
, int argc
, char **argv
)
1338 struct grab_client
*gc
;
1339 struct filter_node
*fn
;
1343 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1344 gc
= grab_client_new(fd
, argc
, argv
, &err
);
1345 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc
, argv
[0], optind
);
1348 fn
= find_filter_node(gc
->conf
->slot_arg
, gc
->audio_format_num
, gc
->conf
->filter_num_arg
);
1350 activate_grab_client(gc
, fn
);
1353 if (err
!= -E_GC_HELP_GIVEN
&& err
!= -E_GC_VERSION_GIVEN
)
1355 if (err
== -E_GC_HELP_GIVEN
) {
1356 msg
= make_message("%s\n\n", grab_client_args_info_usage
);
1357 for (i
= 0; grab_client_args_info_help
[i
]; i
++) {
1358 char *tmp
= make_message("%s%s\n", msg
,
1359 grab_client_args_info_help
[i
]);
1364 msg
= make_message("%s %s\n",
1365 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE
,
1366 GRAB_CLIENT_CMDLINE_PARSER_VERSION
);
1367 err
= client_write(fd
, msg
);
1375 static int __noreturn
com_term(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1378 clean_exit(EXIT_SUCCESS
, "terminating on user request");
1381 static int com_on(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1383 audiod_status
= AUDIOD_ON
;
1388 static int com_off(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1390 audiod_status
= AUDIOD_OFF
;
1395 static int com_sb(int fd
, __a_unused
int argc
, __a_unused
char **argv
)
1397 audiod_status
= AUDIOD_STANDBY
;
1402 static int com_cycle(int fd
, int argc
, char **argv
)
1404 switch (audiod_status
) {
1406 return com_sb(fd
, argc
, argv
);
1409 return com_on(fd
, argc
, argv
);
1411 case AUDIOD_STANDBY
:
1412 return com_off(fd
, argc
, argv
);
1419 static int check_perms(uid_t uid
)
1423 if (!conf
.user_allow_given
)
1425 for (i
= 0; i
< conf
.user_allow_given
; i
++)
1426 if (uid
== conf
.user_allow_arg
[i
])
1428 return -E_UCRED_PERM
;
1431 static int handle_connect(void)
1433 int i
, argc
, ret
, clifd
= -1;
1434 char *buf
= para_malloc(MAXLINE
), **argv
= NULL
;
1435 struct sockaddr_un unix_addr
;
1437 ret
= para_accept(audiod_socket
, &unix_addr
, sizeof(struct sockaddr_un
));
1441 ret
= recv_cred_buffer(clifd
, buf
, MAXLINE
- 1);
1444 PARA_INFO_LOG("connection from user %i\n", ret
);
1445 ret
= check_perms(ret
);
1448 argc
= split_args(buf
, &argv
, "\n");
1449 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv
[0], argc
);
1450 for (i
= 0; cmds
[i
].name
; i
++) {
1451 if (strcmp(cmds
[i
].name
, argv
[0]))
1453 ret
= cmds
[i
].handler(clifd
, argc
, argv
);
1456 ret
= -E_INVALID_AUDIOD_CMD
; /* cmd not found */
1460 if (clifd
> 0 && ret
< 0 && ret
!= -E_CLIENT_WRITE
) {
1461 char *tmp
= make_message("%s\n", PARA_STRERROR(-ret
));
1462 client_write(clifd
, tmp
);
1469 static void audiod_get_socket(void)
1471 struct sockaddr_un unix_addr
;
1473 if (conf
.socket_given
)
1474 socket_name
= para_strdup(conf
.socket_arg
);
1476 char *hn
= para_hostname();
1477 socket_name
= make_message("/var/paraslash/audiod_socket.%s",
1481 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name
);
1482 if (conf
.force_given
)
1483 unlink(socket_name
);
1484 audiod_socket
= create_pf_socket(socket_name
, &unix_addr
,
1485 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
1486 if (audiod_socket
< 0) {
1487 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1488 exit(EXIT_FAILURE
); /* do not unlink socket */
1490 if (listen(audiod_socket
, 5) < 0) {
1491 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1492 exit(EXIT_FAILURE
); /* do not unlink socket */
1494 add_close_on_fork_list(audiod_socket
);
1497 static int open_stat_pipe(void)
1499 int ret
, fd
[3] = {-1, 1, 0};
1501 ret
= para_exec_cmdline_pid(&pid
, BINDIR
"/para_client stat", fd
);
1504 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret
);
1505 add_close_on_fork_list(ret
);
1507 clean_exit(EXIT_FAILURE
, "failed to open status pipe");
1511 static void audiod_pre_select(fd_set
*rfds
, fd_set
*wfds
, struct timeval
*tv
,
1517 struct slot_info
*s
= &slot
[i
];
1518 struct audio_format_info
*a
;
1519 struct receiver_node
*rn
= s
->receiver_node
;
1520 if (s
->format
< 0 || !rn
)
1522 a
= &afi
[s
->format
];
1523 ret
= a
->receiver
->pre_select(rn
, rfds
, wfds
, tv
);
1524 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1525 *max_fileno
= PARA_MAX(*max_fileno
, ret
);
1528 static void audiod_post_select(int select_ret
, fd_set
*rfds
, fd_set
*wfds
)
1533 struct slot_info
*s
= &slot
[i
];
1534 struct audio_format_info
*a
;
1535 struct receiver_node
*rn
= s
->receiver_node
;
1536 if (s
->format
< 0 || !rn
|| rn
->eof
)
1538 a
= &afi
[s
->format
];
1539 ret
= a
->receiver
->post_select(rn
, select_ret
, rfds
, wfds
);
1542 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1543 a
->receiver
->name
, PARA_STRERROR(-ret
), i
);
1545 PARA_INFO_LOG("eof in slot %d\n", i
);
1548 if (ret
< 0 && s
->fci
)
1549 s
->fci
->error
= ret
;
1553 /* TODO: move everything before the select call to pre_select() */
1554 static void __noreturn
audiod_mainloop(void)
1557 int ret
, max_fileno
, sbo
= 0;
1558 char status_buf
[STRINGSIZE
] = "";
1564 /* always check signal pipe and the local socket */
1565 para_fd_set(signal_pipe
, &rfds
, &max_fileno
);
1566 para_fd_set(audiod_socket
, &rfds
, &max_fileno
);
1568 if (audiod_status
!= AUDIOD_ON
)
1569 kill_all_decoders();
1571 start_current_receiver();
1573 set_stream_fds(&wfds
, &max_fileno
);
1575 if (stat_pipe
>= 0 && audiod_status
== AUDIOD_OFF
)
1577 if (stat_pipe
< 0 && audiod_status
!= AUDIOD_OFF
) {
1578 stat_pipe
= open_stat_pipe();
1580 status_buf
[0] = '\0';
1582 if (stat_pipe
>= 0 && audiod_status
!= AUDIOD_OFF
)
1583 para_fd_set(stat_pipe
, &rfds
, &max_fileno
);
1586 tv
.tv_usec
= 200 * 1000;
1587 audiod_pre_select(&rfds
, &wfds
, &tv
, &max_fileno
);
1588 ret
= para_select(max_fileno
+ 1, &rfds
, &wfds
, &tv
);
1591 if (audiod_status
!= AUDIOD_OFF
)
1592 audiod_status_dump();
1593 audiod_post_select(ret
, &rfds
, &wfds
);
1594 /* read status pipe */
1595 if (stat_pipe
>=0 && FD_ISSET(stat_pipe
, &rfds
)) {
1596 ret
= read(stat_pipe
, status_buf
+ sbo
, STRINGSIZE
- 1 - sbo
);
1599 /* avoid busy loop if server is down */
1600 while (sleep(1) > 0)
1603 status_buf
[ret
+ sbo
] = '\0';
1604 sbo
= for_each_line(status_buf
, ret
+ sbo
,
1609 if (FD_ISSET(audiod_socket
, &rfds
)) {
1610 ret
= handle_connect();
1612 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
1616 if (FD_ISSET(signal_pipe
, &rfds
)) {
1617 int sig_nr
= para_next_signal();
1619 handle_signal(sig_nr
);
1624 static void set_initial_status(void)
1626 audiod_status
= AUDIOD_ON
;
1627 if (!conf
.mode_given
)
1629 if (!strcmp(conf
.mode_arg
, "sb")) {
1630 audiod_status
= AUDIOD_STANDBY
;
1633 if (!strcmp(conf
.mode_arg
, "off")) {
1634 audiod_status
= AUDIOD_OFF
;
1637 if (strcmp(conf
.mode_arg
, "on"))
1638 PARA_WARNING_LOG("%s", "invalid mode\n");
1641 int __noreturn
main(int argc
, char *argv
[])
1647 hostname
= para_hostname();
1648 cmdline_parser(argc
, argv
, &conf
);
1649 para_drop_privileges(conf
.user_arg
, conf
.group_arg
);
1650 cf
= configfile_exists();
1652 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0)) {
1653 PARA_EMERG_LOG("%s", "parse error in config file\n");
1657 if (conf
.logfile_given
)
1658 logfile
= open_log(conf
.logfile_arg
);
1659 log_welcome("para_audiod", conf
.loglevel_arg
);
1660 i
= init_stream_io();
1662 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i
));
1665 server_uptime(UPTIME_SET
);
1666 set_initial_status();
1670 setup_signal_handling();
1671 if (conf
.daemon_given
)
1673 audiod_get_socket(); /* doesn't return on errors */