integrate writers into para_audiod
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
3 *
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.
8 *
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.
13 *
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.
17 */
18
19 /** \file audiod.c the paraslash's audio daemon */
20
21 #include <sys/time.h> /* gettimeofday */
22 #include "para.h"
23
24 #include "audiod.cmdline.h"
25 #include "list.h"
26 #include "close_on_fork.h"
27 #include "sched.h"
28 #include "recv.h"
29 #include "filter.h"
30 #include "grab_client.cmdline.h"
31 #include "grab_client.h"
32
33 #include "error.h"
34 #include "audiod.h"
35 #include "net.h"
36 #include "daemon.h"
37 #include "string.h"
38 #include "fd.h"
39 #include "write.h"
40 #include "write_common.h"
41
42 /** define the array of error lists needed by para_audiod */
43 INIT_AUDIOD_ERRLISTS;
44 /** define the array containing all supported audio formats */
45 DEFINE_AUDIO_FORMAT_ARRAY;
46
47 /**
48 * the possible modes of operation
49 *
50 * - off: disconnect from para_server
51 * - on: receive status information from para_server and play the audio stream
52 * - sb: only receive status information but not the audio stream
53 */
54 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
55
56 /** defines how to handle one supported audio format */
57 struct audio_format_info {
58 /** pointer to the receiver for this audio format */
59 struct receiver *receiver;
60 /** the receiver configuration */
61 void *receiver_conf;
62 /** the number of filters that should be activated for this audio format */
63 unsigned int num_filters;
64 /** pointer to the array of filters to be activated */
65 struct filter **filters;
66 /** pointer to the array of filter configurations */
67 void **filter_conf;
68 /** the number of filters that should be activated for this audio format */
69 unsigned int num_writers;
70 /** pointer to the array of writers to be activated */
71 struct writer **writers;
72 /** pointer to the array of writer configurations */
73 void **writer_conf;
74 /** do not start receiver/filters/writer before this time */
75 struct timeval restart_barrier;
76 };
77
78 /**
79 * describes one instance of a receiver-filter-writer chain
80 *
81 * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
82 * writer_node, writer_node_group.
83 */
84 struct slot_info {
85 /** number of the audio format in this slot */
86 int format;
87 /** time of the last successful read from the receiver */
88 struct timeval rtime;
89 /** time the last write to the write fd happend */
90 struct timeval wtime;
91 /** writer start time */
92 struct timeval wstime;
93 /** the receiver info associated with this slot */
94 struct receiver_node *receiver_node;
95 /** the active filter chain */
96 struct filter_chain *fc;
97 /** the active writer node group */
98 struct writer_node_group *wng;
99 };
100 static struct slot_info slot[MAX_STREAM_SLOTS];
101
102 extern const char *status_item_list[NUM_STAT_ITEMS];
103
104 static struct gengetopt_args_info conf;
105 static struct timeval server_stream_start, sa_time_diff;
106 static int playing, current_decoder = -1,
107 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
108 sa_time_diff_sign = 1;
109 static char *af_status, /* the audio format announced in server status */
110 *socket_name, *hostname;
111 static char *stat_item_values[NUM_STAT_ITEMS];
112 static FILE *logfile;
113 static const struct timeval restart_delay = {0, 300 * 1000};
114
115 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
116
117 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
118
119 struct command_task {
120 int fd;
121 struct task task;
122 };
123 static struct command_task command_task_struct, *cmd_task = &command_task_struct;
124
125 struct status_task {
126 int fd;
127 struct task task;
128 char buf[STRINGSIZE];
129 unsigned loaded;
130 };
131 static struct status_task status_task_struct, *stat_task = &status_task_struct;
132
133 struct audiod_task {
134 struct task task;
135 };
136 static struct audiod_task audiod_task_struct, *at = &audiod_task_struct;
137
138 struct signal_task {
139 int fd;
140 int signum;
141 struct task task;
142 };
143
144
145 /** defines one command of para_audiod */
146 struct audiod_command {
147 /** the name of the command */
148 const char *name;
149 /** pointer to the function that handles the command */
150 int (*handler)(int, int, char**);
151 int (*line_handler)(int, char*);
152 /** one-line description of the command */
153 const char *description;
154 /** summary of the command line options */
155 const char *synopsis;
156 /** the long help text */
157 const char *help;
158 };
159 static int com_grab(int, char *);
160 static int com_cycle(int, int, char **);
161 static int com_help(int, int, char **);
162 static int com_off(int, int, char **);
163 static int com_on(int, int, char **);
164 static int com_sb(int, int, char **);
165 static int com_stat(int, int, char **);
166 static int com_term(int, int, char **);
167 static struct audiod_command cmds[] = {
168 {
169 .name = "cycle",
170 .handler = com_cycle,
171 .description = "switch to next mode",
172 .synopsis = "cycle",
173 .help =
174
175 "on -> standby -> off -> on\n"
176
177 },
178 {
179 .name = "grab",
180 .line_handler = com_grab,
181 .description = "grab the audio stream",
182 .synopsis = "-- grab [grab_options]",
183 .help =
184
185 "grab ('splice') the audio stream at any position in the filter \n"
186 "chain and send that data back to the client. Try\n"
187 "\t para_audioc -- grab -h\n"
188 "for the list of available options.\n"
189 },
190
191 {
192 .name = "help",
193 .handler = com_help,
194 .description = "display command list or help for given command",
195 .synopsis = "help [command]",
196 .help =
197
198 "When I was younger, so much younger than today, I never needed\n"
199 "anybody's help in any way. But now these days are gone, I'm not so\n"
200 "self assured. Now I find I've changed my mind and opened up the doors.\n"
201 "\n"
202 " -- Beatles: Help\n"
203
204 },
205 {
206 .name = "off",
207 .handler = com_off,
208 .description = "deactivate para_audiod",
209 .synopsis = "off",
210 .help =
211
212 "Close connection to para_server and stop all decoders.\n"
213
214 },
215 {
216 .name = "on",
217 .handler = com_on,
218 .description = "activate para_audiod",
219 .synopsis = "on",
220 .help =
221
222 "Establish connection to para_server, retrieve para_server's current\n"
223 "status. If playing, start corresponding decoder. Otherwise stop\n"
224 "all decoders.\n"
225
226 },
227 {
228 .name = "sb",
229 .handler = com_sb,
230 .description = "enter standby mode",
231 .synopsis = "sb",
232 .help =
233
234 "Stop all decoders but leave connection to para_server open.\n"
235
236 },
237 {
238 .name = "stat",
239 .handler = com_stat,
240 .description = "print status information",
241 .synopsis = "stat [item1 ...]",
242 .help =
243
244 "Dump given status items (all if none given) to stdout.\n"
245
246 },
247 {
248 .name = "term",
249 .handler = com_term,
250 .description = "terminate audiod",
251 .synopsis = "term",
252 .help =
253
254 "Stop all decoders, shut down connection to para_server and exit.\n"
255
256 },
257 {
258 .name = NULL,
259 }
260 };
261
262 /** iterate over all slots */
263 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
264 /** iterate over all supported audio formats */
265 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
266 /** iterate over the array of all audiod commands */
267 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
268
269 /**
270 * get the audio format number
271 * \param name the name of the audio format
272 *
273 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
274 * \a name is not a supported audio format.
275 */
276 int get_audio_format_num(char *name)
277 {
278 int i;
279 FOR_EACH_AUDIO_FORMAT(i)
280 if (!strcmp(name, audio_formats[i]))
281 return i;
282 return -E_UNSUPPORTED_AUDIO_FORMAT;
283 }
284
285 /*
286 * log function. first argument is loglevel.
287 */
288 void para_log(int ll, const char* fmt,...)
289 {
290 va_list argp;
291 FILE *outfd;
292 struct tm *tm;
293 time_t t1;
294 char str[MAXLINE] = "";
295
296 if (ll < conf.loglevel_arg)
297 return;
298 outfd = logfile? logfile : stderr;
299 time(&t1);
300 tm = localtime(&t1);
301 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
302 fprintf(outfd, "%s %s ", str, hostname);
303 if (conf.loglevel_arg <= INFO)
304 fprintf(outfd, "%i ", ll);
305 va_start(argp, fmt);
306 vfprintf(outfd, fmt, argp);
307 va_end(argp);
308 }
309
310 static int client_write(int fd, const char *buf)
311 {
312 size_t len = strlen(buf);
313 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
314 }
315
316 static char *get_time_string(struct timeval *newest_stime)
317 {
318 struct timeval now, diff, adj_stream_start, tmp;
319 int total = 0, use_server_time = 1;
320
321 if (!playing) {
322 if (length_seconds)
323 return NULL;
324 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
325 }
326 if (audiod_status == AUDIOD_OFF)
327 goto out;
328 if (sa_time_diff_sign > 0)
329 tv_diff(&server_stream_start, &sa_time_diff,
330 &adj_stream_start);
331 else
332 tv_add(&server_stream_start, &sa_time_diff,
333 &adj_stream_start);
334 tmp = adj_stream_start;
335 if (newest_stime && audiod_status == AUDIOD_ON) {
336 tv_diff(newest_stime, &adj_stream_start, &diff);
337 if (tv2ms(&diff) < 5000) {
338 tmp = *newest_stime;
339 use_server_time = 0;
340 }
341 }
342 gettimeofday(&now, NULL);
343 tv_diff(&now, &tmp, &diff);
344 total = diff.tv_sec + offset_seconds;
345 if (total > length_seconds)
346 total = length_seconds;
347 if (total < 0)
348 total = 0;
349 out:
350 return make_message(
351 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
352 status_item_list[SI_PLAY_TIME],
353 use_server_time? "~" : "",
354 total / 60,
355 total % 60,
356 (length_seconds - total) / 60,
357 (length_seconds - total) % 60,
358 length_seconds? (total * 100 + length_seconds / 2) /
359 length_seconds : 0,
360 length_seconds / 60,
361 length_seconds % 60
362 );
363 }
364
365 __malloc static char *audiod_status_string(void)
366 {
367 const char *status = (audiod_status == AUDIOD_ON)?
368 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
369 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
370 }
371
372 static struct timeval *wstime(void)
373 {
374 int i;
375 struct timeval *max = NULL;
376 FOR_EACH_SLOT(i) {
377 struct slot_info *s = &slot[i];
378 if (!s->wng)
379 continue;
380 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
381 continue;
382 max = &s->wstime;
383 }
384 return max;
385 }
386 __malloc static char *decoder_flags(void)
387 {
388 int i;
389 char decoder_flags[MAX_STREAM_SLOTS + 1];
390
391 FOR_EACH_SLOT(i) {
392 struct slot_info *s = &slot[i];
393 char flag = '0';
394 if (s->receiver_node)
395 flag += 1;
396 if (s->wng)
397 flag += 2;
398 decoder_flags[i] = flag;
399 }
400 decoder_flags[MAX_STREAM_SLOTS] = '\0';
401 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
402 decoder_flags);
403 }
404
405 static char *configfile_exists(void)
406 {
407 static char *config_file;
408
409 if (!config_file) {
410 char *home = para_homedir();
411 config_file = make_message("%s/.paraslash/audiod.conf", home);
412 free(home);
413 }
414 return file_exists(config_file)? config_file : NULL;
415 }
416
417 static void setup_signal_handling(void)
418 {
419 sig_task->fd = para_signal_init();
420 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
421 para_install_sighandler(SIGINT);
422 para_install_sighandler(SIGTERM);
423 para_install_sighandler(SIGCHLD);
424 para_install_sighandler(SIGHUP);
425 signal(SIGPIPE, SIG_IGN);
426 }
427
428 static void audiod_status_dump(void)
429 {
430 static char *p_ts, *p_us, *p_as, *p_df;
431 struct timeval *t = wstime();
432 char *us, *tmp = get_time_string(t);
433
434 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
435 stat_client_write(tmp, SI_PLAY_TIME);
436 free(p_ts);
437 p_ts = tmp;
438
439 us = uptime_str();
440 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
441 free(us);
442 if (!p_us || strcmp(p_us, tmp))
443 stat_client_write(tmp, SI_AUDIOD_UPTIME);
444 free(p_us);
445 p_us = tmp;
446
447 tmp = audiod_status_string();
448 if (!p_as || strcmp(p_as, tmp))
449 stat_client_write(tmp, SI_AUDIOD_STATUS);
450 free(p_as);
451 p_as = tmp;
452
453 tmp = decoder_flags();
454 if (!p_df || strcmp(p_df, tmp))
455 stat_client_write(tmp, SI_DECODER_FLAGS);
456 free(p_df);
457 p_df = tmp;
458 }
459
460 static void clear_slot(int slot_num)
461 {
462 struct slot_info *s = &slot[slot_num];
463
464 PARA_INFO_LOG("clearing slot %d\n", slot_num);
465 memset(s, 0, sizeof(struct slot_info));
466 s->format = -1;
467 }
468
469 static void set_restart_barrier(int format, struct timeval *now)
470 {
471 struct timeval tmp;
472
473 if (now)
474 tmp = *now;
475 else
476 gettimeofday(&tmp, NULL);
477 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
478 }
479
480 static void close_receiver(int slot_num)
481 {
482 struct slot_info *s = &slot[slot_num];
483 struct audio_format_info *a;
484
485 if (s->format < 0 || !s->receiver_node)
486 return;
487 a = &afi[s->format];
488 PARA_NOTICE_LOG("closing %s recevier in slot %d (eof = %d)\n",
489 audio_formats[s->format] , slot_num, s->receiver_node->eof);
490 if (!s->receiver_node->eof)
491 unregister_task(&s->receiver_node->task);
492 a->receiver->close(s->receiver_node);
493 free(s->receiver_node);
494 s->receiver_node = NULL;
495 set_restart_barrier(s->format, NULL);
496 }
497 static void close_writer(int slot_num)
498 {
499 struct slot_info *s = &slot[slot_num];
500 if (s->wng) {
501 PARA_INFO_LOG("slot %d: closing writer node group\n",
502 slot_num);
503 wng_close(s->wng);
504 s->wng = NULL;
505 }
506 if (s->fc)
507 *s->fc->output_eof = 1; /* FIXME */
508 }
509
510
511 static void kill_all_decoders(void)
512 {
513 int i;
514
515 FOR_EACH_SLOT(i)
516 close_writer(i);
517 }
518
519 static void check_sigchld(void)
520 {
521 pid_t pid;
522 struct timeval now;
523 gettimeofday(&now, NULL);
524
525 reap_next_child:
526 pid = para_reap_child();
527 if (pid <= 0)
528 return;
529 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
530 goto reap_next_child;
531 }
532
533 static int get_empty_slot(void)
534 {
535 int i;
536 struct slot_info *s;
537
538 FOR_EACH_SLOT(i) {
539 s = &slot[i];
540 if (s->format < 0) {
541 clear_slot(i);
542 return i;
543 }
544 if (s->wng)
545 continue;
546 if (s->receiver_node)
547 continue;
548 if (s->fc)
549 continue;
550 clear_slot(i);
551 return i;
552 }
553 return -E_NO_MORE_SLOTS;
554 }
555
556 static int decoder_running(int format)
557 {
558 int i, ret = 0;
559 struct slot_info *s;
560
561 FOR_EACH_SLOT(i) {
562 s = &slot[i];
563 if (s->format == format && s->receiver_node)
564 ret |= 1;
565 if (s->format == format && s->wng)
566 ret |= 2;
567 }
568 return ret;
569 }
570
571 static void close_stat_pipe(void)
572 {
573 int i;
574
575 if (stat_task->fd < 0)
576 return;
577 PARA_NOTICE_LOG("%s", "closing status pipe\n");
578 close(stat_task->fd);
579 del_close_on_fork_list(stat_task->fd);
580 stat_task->fd = -1;
581 kill_all_decoders();
582 for (i = 0; i < NUM_STAT_ITEMS; i++) {
583 free(stat_item_values[i]);
584 stat_item_values[i] = NULL;
585 }
586 dump_empty_status();
587 length_seconds = 0;
588 offset_seconds = 0;
589 audiod_status_dump();
590 playing = 0;
591 stat_item_values[SI_STATUS_BAR] = make_message("%s:no connection to para_server\n",
592 status_item_list[SI_STATUS_BAR]);
593 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
594 }
595
596 static void __noreturn clean_exit(int status, const char *msg)
597 {
598 PARA_EMERG_LOG("%s\n", msg);
599 kill_all_decoders();
600 if (socket_name)
601 unlink(socket_name);
602 if (stat_task->fd >= 0)
603 close_stat_pipe();
604 exit(status);
605 }
606
607 #if 0
608 __malloc static char *glob_cmd(char *cmd)
609 {
610 char *ret, *replacement;
611 struct timeval tmp, delay, rss; /* real stream start */
612
613 delay.tv_sec = conf.stream_delay_arg / 1000;
614 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
615 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
616 if (sa_time_diff_sign < 0)
617 tv_add(&server_stream_start, &sa_time_diff, &rss);
618 else
619 tv_diff(&server_stream_start, &sa_time_diff, &rss);
620 tv_add(&rss, &delay, &tmp);
621 replacement = make_message("%lu:%lu",
622 (long unsigned)tmp.tv_sec,
623 (long unsigned)tmp.tv_usec);
624 ret = s_a_r(cmd, "STREAM_START", replacement);
625 free(replacement);
626 if (!ret)
627 goto out;
628 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
629 out:
630 return ret;
631 }
632 #endif
633
634 /** get the number of filters for the given audio format */
635 int num_filters(int audio_format_num)
636 {
637 return afi[audio_format_num].num_filters;
638 }
639
640 void filter_event_handler(struct task *t)
641 {
642 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
643 unregister_task(t);
644 }
645
646 static void open_filters(int slot_num)
647 {
648 struct slot_info *s = &slot[slot_num];
649 struct audio_format_info *a = &afi[s->format];
650 int nf = a->num_filters;
651 int i;
652
653 s->fc = NULL;
654 if (!nf)
655 return;
656 s->fc = para_calloc(sizeof(struct filter_chain));
657 INIT_LIST_HEAD(&s->fc->filters);
658 s->fc->inbuf = s->receiver_node->buf;
659 s->fc->in_loaded = &s->receiver_node->loaded;
660 s->fc->input_eof = &s->receiver_node->eof;
661
662 s->fc->task.pre_select = filter_pre_select;
663 s->fc->task.event_handler = filter_event_handler;
664 s->fc->task.private_data = s->fc;
665 s->fc->task.flags = 0;
666 s->fc->eof = 0;
667 sprintf(s->fc->task.status, "filter chain");
668 for (i = 0; i < nf; i++) {
669 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
670 fn->conf = a->filter_conf[i];
671 fn->fc = s->fc;
672 fn->filter = a->filters[i];
673 INIT_LIST_HEAD(&fn->callbacks);
674 list_add_tail(&fn->node, &s->fc->filters);
675 fn->filter->open(fn);
676 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
677 audio_formats[s->format], i + 1, nf,
678 fn->filter->name, slot_num);
679 s->fc->outbuf = fn->buf;
680 s->fc->out_loaded = &fn->loaded;
681 }
682 register_task(&s->fc->task);
683 // PARA_DEBUG_LOG("output loaded for filter chain %p: %p\n", s->fc,
684 // s->fc->out_loaded);
685 }
686
687 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
688 {
689 struct filter_node *fn;
690 int i, j;
691
692 FOR_EACH_SLOT(i) {
693 struct slot_info *s = &slot[i];
694 if (s->format < 0 || !s->fc)
695 continue;
696 if (slot_num >= 0 && slot_num != i)
697 continue;
698 if (format >= 0 && s->format != format)
699 continue;
700 if (num_filters(i) < filternum)
701 continue;
702 /* success */
703 j = 1;
704 list_for_each_entry(fn, &s->fc->filters, node)
705 if (filternum <= 0 || j++ == filternum)
706 break;
707 return fn;
708 }
709 return NULL;
710 }
711
712 static void wng_event_handler(struct task *t)
713 {
714 struct writer_node_group *g = t->private_data;
715 int i;
716
717 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
718 unregister_task(t);
719 FOR_EACH_SLOT(i) {
720 if (slot[i].wng != g)
721 continue;
722 wng_close(g);
723 wng_destroy(g);
724 slot[i].wng = NULL;
725 }
726 }
727
728 static void start_stream_writer(int slot_num, struct timeval *now)
729 {
730 int ret, i;
731 struct slot_info *s = &slot[slot_num];
732 struct audio_format_info *a = &afi[s->format];
733
734 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
735 open_filters(slot_num);
736 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
737 if (!a->num_writers)
738 s->wng = setup_default_wng();
739 else
740 s->wng = wng_new(a->num_writers);
741 if (s->fc) {
742 s->wng->buf = s->fc->outbuf;
743 s->wng->loaded = s->fc->out_loaded;
744 s->wng->input_eof = &s->fc->eof;
745 s->fc->output_eof = &s->wng->eof;
746 } else {
747 s->wng->buf = s->receiver_node->buf;
748 s->wng->loaded = &s->receiver_node->loaded;
749 s->wng->input_eof = &s->receiver_node->eof;
750 }
751 s->wng->task.event_handler = wng_event_handler;
752 for (i = 0; i < a->num_writers; i++) {
753 s->wng->writer_nodes[i].conf = a->writer_conf[i];
754 s->wng->writer_nodes[i].writer = a->writers[i];
755 sprintf(s->wng->writer_nodes[i].task.status, "writer_ node");
756 }
757 ret = wng_open(s->wng);
758 s->wstime = *now;
759 current_decoder = slot_num;
760 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
761 }
762
763 void rn_event_handler(struct task *t)
764 {
765 // struct receiver_node *rn = t->private_data;
766 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
767 unregister_task(t);
768 }
769 static void open_receiver(int format)
770 {
771 struct audio_format_info *a = &afi[format];
772 struct slot_info *s;
773 int ret, slot_num;
774 struct receiver_node *rn;
775
776 slot_num = get_empty_slot();
777 if (slot_num < 0)
778 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
779 s = &slot[slot_num];
780 s->format = format;
781 gettimeofday(&s->rtime, NULL);
782 s->wtime = s->rtime;
783 s->receiver_node = para_calloc(sizeof(struct receiver_node));
784 rn = s->receiver_node;
785 rn->receiver = a->receiver;
786 rn->conf = a->receiver_conf;
787 ret = a->receiver->open(s->receiver_node);
788 if (ret < 0) {
789 PARA_ERROR_LOG("failed to open receiver (%s)\n",
790 PARA_STRERROR(-ret));
791 free(s->receiver_node);
792 s->receiver_node = NULL;
793 return;
794 }
795 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
796 audio_formats[s->format], a->receiver->name, slot_num);
797 rn->task.private_data = s->receiver_node;
798 PARA_NOTICE_LOG("rn = %p\n", rn->task.private_data);
799 rn->task.pre_select = a->receiver->pre_select;
800 rn->task.post_select = a->receiver->post_select;
801 rn->task.event_handler = rn_event_handler;
802 rn->task.flags = 0;
803 sprintf(rn->task.status, "receiver node");
804 register_task(&rn->task);
805 }
806
807 static int is_frozen(int format)
808 {
809 struct timeval now;
810 struct audio_format_info *a = &afi[format];
811
812 gettimeofday(&now, NULL);
813 return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
814 }
815
816 static void start_current_receiver(void)
817 {
818 int i;
819
820 if (!af_status)
821 return;
822 i = get_audio_format_num(af_status);
823 if (i < 0)
824 return;
825 if ((decoder_running(i) & 1) || is_frozen(i))
826 return;
827 open_receiver(i);
828 }
829
830 static void compute_time_diff(const struct timeval *status_time)
831 {
832 struct timeval now, tmp, diff;
833 static int count;
834 int sign;
835 const struct timeval max_deviation = {0, 500 * 1000};
836 const int time_smooth = 5;
837
838 gettimeofday(&now, NULL);
839 sign = tv_diff(status_time, &now, &diff);
840 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
841 // sign, sa_time_diff_sign);
842 if (!count) {
843 sa_time_diff_sign = sign;
844 sa_time_diff = diff;
845 count++;
846 return;
847 }
848 if (count > 5) {
849 int s = tv_diff(&diff, &sa_time_diff, &tmp);
850 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
851 PARA_WARNING_LOG("time diff jump: %lims\n",
852 s * tv2ms(&tmp));
853 }
854 count++;
855 sa_time_diff_sign = tv_convex_combination(
856 sa_time_diff_sign * time_smooth, &sa_time_diff,
857 count > 10? sign : sign * time_smooth, &diff,
858 &tmp);
859 sa_time_diff = tmp;
860 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
861 sign > 0? "+" : "-",
862 tv2ms(&diff),
863 sa_time_diff_sign ? "+" : "-",
864 tv2ms(&sa_time_diff)
865 );
866 }
867
868 static void check_stat_line(char *line)
869 {
870 int itemnum;
871 size_t ilen = 0;
872 long unsigned sec, usec;
873 char *tmp;
874
875 // PARA_INFO_LOG("line: %s\n", line);
876 if (!line)
877 return;
878 itemnum = stat_line_valid(line);
879 if (itemnum < 0) {
880 PARA_WARNING_LOG("invalid status line: %s\n", line);
881 return;
882 }
883 tmp = make_message("%s\n", line);
884 stat_client_write(tmp, itemnum);
885 free(tmp);
886 free(stat_item_values[itemnum]);
887 stat_item_values[itemnum] = para_strdup(line);
888 ilen = strlen(status_item_list[itemnum]);
889 switch (itemnum) {
890 case SI_STATUS:
891 playing = strstr(line, "playing")? 1 : 0;
892 break;
893 case SI_FORMAT:
894 free(af_status);
895 af_status = para_strdup(line + ilen + 1);
896 break;
897 case SI_OFFSET:
898 offset_seconds = atoi(line + ilen + 1);
899 break;
900 case SI_LENGTH:
901 length_seconds = atoi(line + ilen + 1);
902 break;
903 case SI_STREAM_START:
904 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
905 server_stream_start.tv_sec = sec;
906 server_stream_start.tv_usec = usec;
907 }
908 break;
909 case SI_CURRENT_TIME:
910 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
911 struct timeval tv = {sec, usec};
912 compute_time_diff(&tv);
913 }
914 break;
915 }
916 }
917
918 static void handle_signal(int sig)
919 {
920 switch (sig) {
921 case SIGCHLD:
922 return check_sigchld();
923 case SIGINT:
924 case SIGTERM:
925 case SIGHUP:
926 PARA_EMERG_LOG("terminating on signal %d\n", sig);
927 clean_exit(EXIT_FAILURE, "caught deadly signal");
928 return;
929 }
930 }
931
932 static void check_timeouts(void)
933 {
934 struct timeval now;
935 int slot_num, timeout = conf.stream_timeout_arg;
936
937 gettimeofday(&now, NULL);
938 FOR_EACH_SLOT(slot_num) {
939 struct slot_info *s = &slot[slot_num];
940 if (s->format < 0)
941 continue;
942 /* check read time */
943 if (s->receiver_node &&
944 now.tv_sec > s->rtime.tv_sec + timeout) {
945 PARA_INFO_LOG("%s stream (slot %d) not ready\n",
946 audio_formats[s->format], slot_num);
947 s->receiver_node->eof = 1;
948 }
949 }
950 }
951
952 static void close_decoder_if_idle(int slot_num)
953 {
954 struct slot_info *s = &slot[slot_num];
955
956 if (s->format < 0)
957 return;
958 if (!s->fc)
959 return;
960 if (s->wng)
961 return;
962 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
963 slot_num, s->fc);
964 close_filters(s->fc);
965 free(s->fc);
966 close_receiver(slot_num);
967 clear_slot(slot_num);
968 }
969
970 static void audiod_pre_select(__a_unused struct sched *s, __a_unused struct task *t)
971 {
972 int i;
973
974 if (audiod_status != AUDIOD_ON)
975 kill_all_decoders();
976 else if (playing)
977 start_current_receiver();
978 check_timeouts();
979 FOR_EACH_SLOT(i) {
980 struct receiver_node *rn;
981
982 close_decoder_if_idle(i);
983 if (slot[i].format < 0)
984 continue;
985 rn = slot[i].receiver_node;
986 if (rn && rn->loaded && !slot[i].wng) {
987 PARA_INFO_LOG("no writer in slot %d\n", i);
988 start_stream_writer(i, &s->now);
989 }
990 }
991 }
992
993 #if 0
994 static int write_audio_data(int slot_num)
995 {
996 struct slot_info *s = &slot[slot_num];
997 struct audio_format_info *a = &afi[s->format];
998 struct receiver_node *rn = s->receiver_node;
999 int ret;
1000 char **buf;
1001 size_t *len;
1002
1003 if (a->num_filters) {
1004 buf = &s->fc->outbuf;
1005 len = s->fc->out_loaded;
1006 } else {
1007 buf = &rn->buf;
1008 len = &rn->loaded;
1009 }
1010 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
1011 ret = write(s->write_fd, *buf, *len);
1012 PARA_DEBUG_LOG("wrote %d/%zd\n", ret, *len);
1013 if (ret < 0) {
1014 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
1015 slot_num, s->write_fd, strerror(errno));
1016 *len = 0;
1017 close_writer(slot_num);
1018 // s->fc->error = E_WRITE_AUDIO_DATA;
1019 } else if (ret != *len) {
1020 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
1021 audio_formats[s->format], ret, *len, slot_num);
1022 *len -= ret;
1023 memmove(*buf, *buf + ret, *len);
1024 } else
1025 *len = 0;
1026 if (ret > 0)
1027 gettimeofday(&s->wtime, NULL);
1028 return ret;
1029 }
1030 #endif
1031
1032
1033 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
1034 {
1035 int i;
1036
1037 FOR_EACH_SLOT(i) {
1038 struct receiver_node *rn = slot[i].receiver_node;
1039
1040 if (rn && rn->loaded)
1041 slot[i].rtime = s->now;
1042 // if (slot[i].write_fd <= 0 || !slot[i].wcheck
1043 // || !FD_ISSET(slot[i].write_fd, &s->wfds))
1044 // continue;
1045 // ret = write_audio_data(i);
1046 }
1047 }
1048
1049 static void init_audiod_task(struct audiod_task *at)
1050 {
1051 at->task.pre_select = audiod_pre_select;
1052 at->task.post_select = audiod_post_select;
1053 at->task.private_data = at;
1054 at->task.flags = 0;
1055 sprintf(at->task.status, "audiod task");
1056 }
1057
1058 static int parse_stream_command(const char *txt, char **cmd)
1059 {
1060 char *p = strchr(txt, ':');
1061 int i;
1062
1063 if (!p)
1064 return -E_MISSING_COLON;
1065 p++;
1066 FOR_EACH_AUDIO_FORMAT(i) {
1067 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1068 continue;
1069 *cmd = p;
1070 return i;
1071 }
1072 return -E_UNSUPPORTED_AUDIO_FORMAT;
1073 }
1074
1075 static int add_filter(int format, char *cmdline)
1076 {
1077 struct audio_format_info *a = &afi[format];
1078 int filter_num, nf = a->num_filters;
1079
1080 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1081 if (filter_num < 0)
1082 return filter_num;
1083 a->filters[nf] = &filters[filter_num];
1084 a->num_filters++;
1085 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1086 a->filters[nf]->name);
1087 return filter_num;
1088 }
1089
1090 static int setup_default_filters(void)
1091 {
1092 int i, ret = 1;
1093
1094 FOR_EACH_AUDIO_FORMAT(i) {
1095 struct audio_format_info *a = &afi[i];
1096 char *tmp;
1097 int j;
1098 if (a->num_filters)
1099 continue;
1100 /* add "dec" to audio format name */
1101 tmp = make_message("%sdec", audio_formats[i]);
1102 for (j = 0; filters[j].name; j++)
1103 if (!strcmp(tmp, filters[j].name))
1104 break;
1105 free(tmp);
1106 ret = -E_UNSUPPORTED_FILTER;
1107 if (!filters[j].name)
1108 goto out;
1109 tmp = para_strdup(filters[j].name);
1110 ret = add_filter(i, tmp);
1111 free(tmp);
1112 if (ret < 0)
1113 goto out;
1114 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1115 filters[j].name);
1116 ret = add_filter(i, "wav");
1117 if (ret < 0)
1118 goto out;
1119 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1120 }
1121 out:
1122 return ret;
1123 }
1124
1125 static int init_stream_io(void)
1126 {
1127 int i, ret, receiver_num, nf, nw;
1128 char *cmd;
1129 struct audio_format_info *a;
1130
1131 init_supported_writers();
1132 nw = PARA_MAX(1, conf.writer_given);
1133 PARA_INFO_LOG("allocating space for %d writers\n", nw);
1134 FOR_EACH_AUDIO_FORMAT(i) {
1135 a = &afi[i];
1136 a->writer_conf = para_malloc(nw * sizeof(void *));
1137 a->writers = para_malloc(nw * sizeof(struct writer *));
1138 a->num_writers = 0;
1139 }
1140 for (i = 0; i < conf.writer_given; i++) {
1141 void *wconf;
1142 int writer_num;
1143 ret = parse_stream_command(conf.writer_arg[i], &cmd);
1144 if (ret < 0)
1145 goto out;
1146 a = &afi[ret];
1147 nw = a->num_writers;
1148 wconf = check_writer_arg(cmd, &writer_num);
1149 if (!wconf) {
1150 ret = writer_num;
1151 goto out;
1152 }
1153 a->writers[nw] = &writers[ret];
1154 a->writer_conf[nw] = wconf;
1155 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
1156 nw, writer_names[writer_num]);
1157 a->num_writers++;
1158 }
1159 for (i = 0; receivers[i].name; i++) {
1160 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1161 receivers[i].init(&receivers[i]);
1162 }
1163 for (i = 0; i < conf.receiver_given; i++) {
1164 char *arg = conf.receiver_arg[i];
1165 char *recv = strchr(arg, ':');
1166 ret = -E_MISSING_COLON;
1167 if (!recv)
1168 goto out;
1169 *recv = '\0';
1170 recv++;
1171 ret = get_audio_format_num(arg);
1172 if (ret < 0)
1173 goto out;
1174 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1175 if (!afi[ret].receiver_conf) {
1176 ret = -E_RECV_SYNTAX;
1177 goto out;
1178 }
1179 afi[ret].receiver = &receivers[receiver_num];
1180 }
1181 /* use the first available receiver with no arguments
1182 * for those audio formats for which no receiver
1183 * was specified
1184 */
1185 cmd = para_strdup(receivers[0].name);
1186 FOR_EACH_AUDIO_FORMAT(i) {
1187 a = &afi[i];
1188 if (a->receiver_conf)
1189 continue;
1190 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1191 if (!a->receiver_conf)
1192 return -E_RECV_SYNTAX;
1193 a->receiver = &receivers[receiver_num];
1194 }
1195 free(cmd);
1196 /* filters */
1197 filter_init(filters);
1198 nf = PARA_MAX(2, conf.filter_given) + 1;
1199 PARA_INFO_LOG("allocating space for %d filters\n", nf);
1200 FOR_EACH_AUDIO_FORMAT(i) {
1201 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1202 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1203 }
1204 if (!conf.no_default_filters_given)
1205 return setup_default_filters();
1206 for (i = 0; i < conf.filter_given; i++) {
1207 char *arg = conf.filter_arg[i];
1208 char *filter_name = strchr(arg, ':');
1209 ret = -E_MISSING_COLON;
1210 if (!filter_name)
1211 goto out;
1212 *filter_name = '\0';
1213 filter_name++;
1214 ret = get_audio_format_num(arg);
1215 if (ret < 0)
1216 goto out;
1217 ret = add_filter(ret, filter_name);
1218 if (ret < 0)
1219 goto out;
1220 }
1221 ret = 1;
1222 out:
1223 return ret;
1224 }
1225
1226 static int dump_commands(int fd)
1227 {
1228 char *buf = para_strdup(""), *tmp = NULL;
1229 int i;
1230 ssize_t ret;
1231
1232 FOR_EACH_COMMAND(i) {
1233 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1234 cmds[i].description);
1235 free(buf);
1236 buf = tmp;
1237 }
1238 ret = client_write(fd, buf);
1239 free(buf);
1240 return ret;
1241 }
1242
1243 /*
1244 * command handlers don't close their fd on errors (ret < 0) so that
1245 * its caller can send an error message. Otherwise (ret >= 0) it's up
1246 * to each individual command to close the fd if necessary.
1247 */
1248
1249 static int com_help(int fd, int argc, char **argv)
1250 {
1251 int i, ret;
1252 char *buf;
1253 const char *dflt = "No such command. Available commands:\n";
1254
1255 if (argc < 2) {
1256 ret = dump_commands(fd);
1257 goto out;
1258 }
1259 FOR_EACH_COMMAND(i) {
1260 if (strcmp(cmds[i].name, argv[1]))
1261 continue;
1262 buf = make_message(
1263 "NAME\n\t%s -- %s\n"
1264 "SYNOPSIS\n\tpara_audioc %s\n"
1265 "DESCRIPTION\n%s\n",
1266 argv[1],
1267 cmds[i].description,
1268 cmds[i].synopsis,
1269 cmds[i].help
1270 );
1271 ret = client_write(fd, buf);
1272 free(buf);
1273 goto out;
1274 }
1275 ret = client_write(fd, dflt);
1276 if (ret > 0)
1277 ret = dump_commands(fd);
1278 out:
1279 if (ret >= 0)
1280 close(fd);
1281 return ret;
1282 }
1283
1284 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1285 {
1286 int i, ret;
1287 char *buf = NULL;
1288 long unsigned mask = ~0LU;
1289
1290 if (argc > 1) {
1291 mask = 0;
1292 for (i = 1; i < argc; i++) {
1293 ret = stat_item_valid(argv[i]);
1294 if (ret < 0)
1295 return ret;
1296 mask |= (1 << ret);
1297 }
1298 }
1299 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1300 if (mask & (1 << SI_PLAY_TIME)) {
1301 struct timeval *t = wstime();
1302 char *ts = get_time_string(t);
1303 if (ts) {
1304 ret = client_write(fd, ts);
1305 if (ret < 0)
1306 goto out;
1307 free(ts);
1308 }
1309 }
1310 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1311 char *tmp, *us = uptime_str();
1312 tmp = make_message("%s:%s\n",
1313 status_item_list[SI_AUDIOD_UPTIME], us);
1314 free(us);
1315 ret = client_write(fd, tmp);
1316 if (ret < 0)
1317 goto out;
1318 free(tmp);
1319 }
1320 if (mask & (1 << SI_AUDIOD_STATUS)) {
1321 char *s = audiod_status_string();
1322 ret = client_write(fd, s);
1323 if (ret < 0)
1324 goto out;
1325 free(s);
1326 }
1327 if (mask & (1 << SI_DECODER_FLAGS)) {
1328 char *df =decoder_flags();
1329 ret = client_write(fd, df);
1330 if (ret < 0)
1331 goto out;
1332 free(df);
1333 }
1334
1335 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1336 char *tmp, *v;
1337 if (!((1 << i) & mask))
1338 continue;
1339 v = stat_item_values[i];
1340 tmp = make_message("%s%s%s", buf? buf: "",
1341 v? v : "", v? "\n" : "");
1342 free(buf);
1343 buf = tmp;
1344 }
1345 ret = client_write(fd, buf);
1346 out:
1347 if (ret > 0)
1348 ret = stat_client_add(fd, mask);
1349 free(buf);
1350 return ret;
1351 }
1352
1353 #if 0
1354 static char *list_filters(void)
1355 {
1356 int i, j;
1357 char *tmp, *msg = make_message("format\tnum\tcmd\n");
1358
1359 FOR_EACH_AUDIO_FORMAT(i) {
1360 for (j = 0; j < afi[i].num_filters; j++) {
1361 tmp = make_message("%s\t%i\t%s\n",
1362 afi[i].name, j, afi[i].filter_cmds[j]);
1363 msg = para_strcat(msg, tmp);
1364 free(tmp);
1365 }
1366 tmp = make_message("%s\t%i\t%s\n", afi[i].name,
1367 j, afi[i].write_cmd);
1368 msg = para_strcat(msg, tmp);
1369 free(tmp);
1370 }
1371 return msg;
1372 }
1373 #endif
1374
1375
1376 static int com_grab(int fd, char *cmdline)
1377 {
1378 struct grab_client *gc;
1379 struct filter_node *fn;
1380 int i, err;
1381 char *msg;
1382
1383 gc = grab_client_new(fd, cmdline, &err);
1384 if (!gc)
1385 goto err_out;
1386 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1387 if (fn)
1388 activate_grab_client(gc, fn);
1389 return 1;
1390 err_out:
1391 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1392 return err;
1393 if (err == -E_GC_HELP_GIVEN) {
1394 msg = make_message("%s\n\n", grab_client_args_info_usage);
1395 for (i = 0; grab_client_args_info_help[i]; i++) {
1396 char *tmp = make_message("%s%s\n", msg,
1397 grab_client_args_info_help[i]);
1398 free(msg);
1399 msg = tmp;
1400 }
1401 } else
1402 msg = make_message("%s %s\n",
1403 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1404 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1405 err = client_write(fd, msg);
1406 free(msg);
1407 if (err < 0)
1408 return err;
1409 close(fd);
1410 return 1;
1411 }
1412
1413 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1414 {
1415 close(fd);
1416 clean_exit(EXIT_SUCCESS, "terminating on user request");
1417 }
1418
1419 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1420 {
1421 audiod_status = AUDIOD_ON;
1422 close(fd);
1423 return 1;
1424 }
1425
1426 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1427 {
1428 audiod_status = AUDIOD_OFF;
1429 close(fd);
1430 return 1;
1431 }
1432
1433 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1434 {
1435 audiod_status = AUDIOD_STANDBY;
1436 close(fd);
1437 return 1;
1438 }
1439
1440 static int com_cycle(int fd, int argc, char **argv)
1441 {
1442 switch (audiod_status) {
1443 case AUDIOD_ON:
1444 return com_sb(fd, argc, argv);
1445 break;
1446 case AUDIOD_OFF:
1447 return com_on(fd, argc, argv);
1448 break;
1449 case AUDIOD_STANDBY:
1450 return com_off(fd, argc, argv);
1451 break;
1452 }
1453 close(fd);
1454 return 1;
1455 }
1456
1457 static int check_perms(uid_t uid)
1458 {
1459 int i;
1460
1461 if (!conf.user_allow_given)
1462 return 1;
1463 for (i = 0; i < conf.user_allow_given; i++)
1464 if (uid == conf.user_allow_arg[i])
1465 return 1;
1466 return -E_UCRED_PERM;
1467 }
1468
1469 static int handle_connect(void)
1470 {
1471 int i, argc, ret, clifd = -1;
1472 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1473 struct sockaddr_un unix_addr;
1474
1475 ret = para_accept(cmd_task->fd, &unix_addr, sizeof(struct sockaddr_un));
1476 if (ret < 0)
1477 goto out;
1478 clifd = ret;
1479 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1480 if (ret < 0)
1481 goto out;
1482 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1483 ret = check_perms(ret);
1484 if (ret < 0)
1485 goto out;
1486 ret = -E_INVALID_AUDIOD_CMD;
1487 cmd = para_strdup(buf);
1488 p = strchr(cmd, '\n');
1489 if (!p)
1490 p = "";
1491 else {
1492 *p = '\0';
1493 p++;
1494 }
1495 for (i = 0; cmds[i].name; i++) {
1496 int j;
1497 if (strcmp(cmds[i].name, cmd))
1498 continue;
1499 if (cmds[i].handler) {
1500 argc = split_args(buf, &argv, "\n");
1501 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1502 ret = cmds[i].handler(clifd, argc, argv);
1503 goto out;
1504 }
1505 for (j = 0; p[j]; j++)
1506 if (p[j] == '\n')
1507 p[j] = ' ';
1508 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1509 ret = cmds[i].line_handler(clifd, p);
1510 goto out;
1511 }
1512 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1513 out:
1514 free(cmd);
1515 free(buf);
1516 free(argv);
1517 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1518 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1519 client_write(clifd, tmp);
1520 free(tmp);
1521 close(clifd);
1522 }
1523 return ret;
1524 }
1525
1526 static void audiod_get_socket(void)
1527 {
1528 struct sockaddr_un unix_addr;
1529
1530 if (conf.socket_given)
1531 socket_name = para_strdup(conf.socket_arg);
1532 else {
1533 char *hn = para_hostname();
1534 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1535 hn);
1536 free(hn);
1537 }
1538 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1539 if (conf.force_given)
1540 unlink(socket_name);
1541 cmd_task->fd = create_pf_socket(socket_name, &unix_addr,
1542 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1543 if (cmd_task->fd < 0) {
1544 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1545 exit(EXIT_FAILURE); /* do not unlink socket */
1546 }
1547 if (listen(cmd_task->fd , 5) < 0) {
1548 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1549 exit(EXIT_FAILURE); /* do not unlink socket */
1550 }
1551 add_close_on_fork_list(cmd_task->fd);
1552 }
1553
1554 static int open_stat_pipe(void)
1555 {
1556 int ret, fd[3] = {-1, 1, 0};
1557 pid_t pid;
1558 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1559 if (ret >= 0) {
1560 ret = fd[1];
1561 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1562 add_close_on_fork_list(ret);
1563 } else
1564 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1565 return ret;
1566 }
1567
1568 void signal_event_handler(struct task *t)
1569 {
1570 struct signal_task *st = t->private_data;
1571 handle_signal(st->signum);
1572 }
1573
1574 void signal_pre_select(struct sched *s, struct task *t)
1575 {
1576 struct signal_task *st = t->private_data;
1577 t->ret = 1;
1578 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1579 }
1580
1581 void signal_post_select(struct sched *s, struct task *t)
1582 {
1583 struct signal_task *st = t->private_data;
1584 t->ret = 1;
1585 if (!FD_ISSET(st->fd, &s->rfds))
1586 return;
1587 t->ret = -E_SIGNAL_CAUGHT;
1588 st->signum = para_next_signal();
1589 }
1590
1591 void signal_setup_default(struct signal_task *st)
1592 {
1593 st->task.pre_select = signal_pre_select;
1594 st->task.post_select = signal_post_select;
1595 st->task.private_data = st;
1596 st->task.flags = 0;
1597 sprintf(st->task.status, "signal task");
1598 }
1599
1600 static void command_pre_select(struct sched *s, struct task *t)
1601 {
1602 struct command_task *ct = t->private_data;
1603 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1604
1605 }
1606
1607 static void command_post_select(struct sched *s, struct task *t)
1608 {
1609 int ret;
1610 struct command_task *ct = t->private_data;
1611
1612 if (audiod_status != AUDIOD_OFF)
1613 audiod_status_dump();
1614 t->ret = 1; /* always successful */
1615 if (!FD_ISSET(ct->fd, &s->rfds))
1616 return;
1617 ret = handle_connect();
1618 if (ret < 0)
1619 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1620 }
1621
1622 void init_command_task(struct command_task *ct)
1623 {
1624 ct->task.pre_select = command_pre_select;
1625 ct->task.post_select = command_post_select;
1626 ct->task.private_data = ct;
1627 ct->task.flags = 0;
1628 sprintf(ct->task.status, "command task");
1629 }
1630
1631 static void status_pre_select(struct sched *s, struct task *t)
1632 {
1633 struct status_task *st = t->private_data;
1634 t->ret = 1;
1635 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1636 close_stat_pipe();
1637 if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
1638 st->fd = open_stat_pipe();
1639 st->loaded = 0;
1640 st->buf[0] = '\0';
1641 }
1642 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1643 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1644 }
1645
1646 static void status_post_select(struct sched *s, struct task *t)
1647 {
1648 struct status_task *st = t->private_data;
1649 int ret;
1650
1651 t->ret = 1;
1652 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1653 return;
1654 ret = read(st->fd, st->buf + st->loaded,
1655 STRINGSIZE - 1 - st->loaded);
1656 if (ret <= 0) {
1657 close_stat_pipe();
1658 /* avoid busy loop if server is down */
1659 while (sleep(1) > 0)
1660 ; /* try again*/
1661 } else {
1662 st->buf[ret + st->loaded] = '\0';
1663 st->loaded = for_each_line(st->buf, ret + st->loaded,
1664 &check_stat_line);
1665 }
1666 }
1667
1668 static void init_status_task(struct status_task *st)
1669 {
1670 st->task.pre_select = status_pre_select;
1671 st->task.post_select = status_post_select;
1672 st->task.private_data = st;
1673 st->task.flags = 0;
1674 st->loaded = 0;
1675 st->fd = -1;
1676 st->buf[0] = '\0';
1677 sprintf(st->task.status, "status task");
1678 }
1679
1680
1681
1682 #if 0
1683 /* TODO: move everything before the select call to pre_select() */
1684 static void __noreturn audiod_mainloop(void)
1685 {
1686 fd_set rfds, wfds;
1687 int ret, max_fileno, sbo = 0;
1688 char status_buf[STRINGSIZE] = "";
1689 struct timeval tv;
1690
1691
1692
1693 repeat:
1694 FD_ZERO(&wfds);
1695 FD_ZERO(&rfds);
1696 max_fileno = -1;
1697 /* always check signal pipe and the local socket */
1698 para_fd_set(signal_pipe, &rfds, &max_fileno);
1699 para_fd_set(audiod_socket, &rfds, &max_fileno);
1700
1701 if (audiod_status != AUDIOD_ON)
1702 kill_all_decoders();
1703 else if (playing)
1704 start_current_receiver();
1705
1706 set_stream_fds(&wfds, &max_fileno);
1707 /* status pipe */
1708 if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
1709 close_stat_pipe();
1710 if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
1711 stat_pipe = open_stat_pipe();
1712 sbo = 0;
1713 status_buf[0] = '\0';
1714 }
1715 if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF)
1716 para_fd_set(stat_pipe, &rfds, &max_fileno);
1717 /* local socket */
1718 tv.tv_sec = 0;
1719 tv.tv_usec = 200 * 1000;
1720 audiod_pre_select(&rfds, &wfds, &tv, &max_fileno);
1721 ret = para_select(max_fileno + 1, &rfds, &wfds, &tv);
1722 if (ret < 0)
1723 goto repeat;
1724 if (audiod_status != AUDIOD_OFF)
1725 audiod_status_dump();
1726 audiod_post_select(ret, &rfds, &wfds);
1727 /* read status pipe */
1728 if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
1729 ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
1730 if (ret <= 0) {
1731 close_stat_pipe();
1732 /* avoid busy loop if server is down */
1733 while (sleep(1) > 0)
1734 ; /* try again*/
1735 } else {
1736 status_buf[ret + sbo] = '\0';
1737 sbo = for_each_line(status_buf, ret + sbo,
1738 &check_stat_line);
1739 }
1740 }
1741 slot_io(&wfds);
1742 if (FD_ISSET(audiod_socket, &rfds)) {
1743 ret = handle_connect();
1744 if (ret < 0) {
1745 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1746 }
1747 }
1748 /* signals */
1749 if (FD_ISSET(signal_pipe, &rfds)) {
1750 int sig_nr = para_next_signal();
1751 if (sig_nr > 0)
1752 handle_signal(sig_nr);
1753 }
1754 goto repeat;
1755 }
1756 #endif
1757
1758 static void set_initial_status(void)
1759 {
1760 audiod_status = AUDIOD_ON;
1761 if (!conf.mode_given)
1762 return;
1763 if (!strcmp(conf.mode_arg, "sb")) {
1764 audiod_status = AUDIOD_STANDBY;
1765 return;
1766 }
1767 if (!strcmp(conf.mode_arg, "off")) {
1768 audiod_status = AUDIOD_OFF;
1769 return;
1770 }
1771 if (strcmp(conf.mode_arg, "on"))
1772 PARA_WARNING_LOG("%s", "invalid mode\n");
1773 }
1774
1775 int main(int argc, char *argv[])
1776 {
1777 char *cf;
1778 int ret, i;
1779 struct sched s;
1780
1781 init_sched();
1782
1783 valid_fd_012();
1784 hostname = para_hostname();
1785 cmdline_parser(argc, argv, &conf);
1786 para_drop_privileges(conf.user_arg, conf.group_arg);
1787 cf = configfile_exists();
1788 if (cf) {
1789 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1790 PARA_EMERG_LOG("%s", "parse error in config file\n");
1791 exit(EXIT_FAILURE);
1792 }
1793 }
1794 if (conf.logfile_given)
1795 logfile = open_log(conf.logfile_arg);
1796 log_welcome("para_audiod", conf.loglevel_arg);
1797 i = init_stream_io();
1798 if (i < 0) {
1799 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1800 exit(EXIT_FAILURE);
1801 }
1802 // return 0;
1803 server_uptime(UPTIME_SET);
1804 set_initial_status();
1805 FOR_EACH_SLOT(i)
1806 clear_slot(i);
1807 init_grabbing();
1808 setup_signal_handling();
1809 if (conf.daemon_given)
1810 daemon_init();
1811 audiod_get_socket(); /* doesn't return on errors */
1812
1813 signal_setup_default(sig_task);
1814 sig_task->task.event_handler = signal_event_handler;
1815
1816 init_status_task(stat_task);
1817 init_command_task(cmd_task);
1818 init_audiod_task(at);
1819
1820 register_task(&sig_task->task);
1821 register_task(&cmd_task->task);
1822 register_task(&stat_task->task);
1823 register_task(&at->task);
1824 s.default_timeout.tv_sec = 0;
1825 s.default_timeout.tv_usec = 99 * 1000;
1826 ret = sched(&s);
1827
1828 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1829 return EXIT_FAILURE;
1830 }