forked from mikebrady/shairport-sync
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathshairport.c
1333 lines (1172 loc) · 49.2 KB
/
shairport.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Shairport, an Apple Airplay receiver
* Copyright (c) James Laird 2013
* All rights reserved.
* Modifications (c) Mike Brady 2014--2017
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <libconfig.h>
#include <libgen.h>
#include <memory.h>
#include <net/if.h>
#include <popt.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "config.h"
#ifdef HAVE_LIBMBEDTLS
#include <mbedtls/md5.h>
#endif
#ifdef HAVE_LIBPOLARSSL
#include <polarssl/md5.h>
#endif
#ifdef HAVE_LIBSSL
#include <openssl/md5.h>
#endif
#include "common.h"
#include "mdns.h"
#include "rtp.h"
#include "rtsp.h"
#include <libdaemon/dexec.h>
#include <libdaemon/dfork.h>
#include <libdaemon/dlog.h>
#include <libdaemon/dpid.h>
#include <libdaemon/dsignal.h>
#ifdef CONFIG_CONVOLUTION
#include <FFTConvolver/convolver.h>
#endif
static int shutting_down = 0;
static char *appName = NULL;
char configuration_file_path[4096 + 1];
char actual_configuration_file_path[4096 + 1];
void shairport_shutdown() {
if (shutting_down)
return;
shutting_down = 1;
mdns_unregister();
rtsp_request_shutdown_stream();
if (config.output)
config.output->deinit();
}
static void sig_ignore(int foo, siginfo_t *bar, void *baz) {}
static void sig_shutdown(int foo, siginfo_t *bar, void *baz) {
debug(1, "shutdown requested...");
shairport_shutdown();
// daemon_log(LOG_NOTICE, "exit...");
daemon_retval_send(255);
daemon_pid_file_remove();
exit(0);
}
static void sig_child(int foo, siginfo_t *bar, void *baz) {
pid_t pid;
while ((pid = waitpid((pid_t)-1, 0, WNOHANG)) > 0) {
if (pid == mdns_pid && !shutting_down) {
die("MDNS child process died unexpectedly!");
}
}
}
static void sig_disconnect_audio_output(int foo, siginfo_t *bar, void *baz) {
debug(1, "disconnect audio output requested.");
set_requested_connection_state_to_output(0);
}
static void sig_connect_audio_output(int foo, siginfo_t *bar, void *baz) {
debug(1, "connect audio output requested.");
set_requested_connection_state_to_output(1);
}
char *get_version_string() {
char *version_string = malloc(200);
if (version_string) {
strcpy(version_string, PACKAGE_VERSION);
#ifdef HAVE_LIBMBEDTLS
strcat(version_string, "-mbedTLS");
#endif
#ifdef HAVE_LIBPOLARSSL
strcat(version_string, "-PolarSSL");
#endif
#ifdef HAVE_LIBSSL
strcat(version_string, "-OpenSSL");
#endif
#ifdef CONFIG_TINYSVCMDNS
strcat(version_string, "-tinysvcmdns");
#endif
#ifdef CONFIG_AVAHI
strcat(version_string, "-Avahi");
#endif
#ifdef CONFIG_DNS_SD
strcat(version_string, "-dns_sd");
#endif
#ifdef CONFIG_ALSA
strcat(version_string, "-ALSA");
#endif
#ifdef CONFIG_SNDIO
strcat(version_string, "-sndio");
#endif
#ifdef CONFIG_AO
strcat(version_string, "-ao");
#endif
#ifdef CONFIG_PULSE
strcat(version_string, "-pulse");
#endif
#ifdef CONFIG_SOUNDIO
strcat(version_string, "-soundio");
#endif
#ifdef CONFIG_DUMMY
strcat(version_string, "-dummy");
#endif
#ifdef CONFIG_STDOUT
strcat(version_string, "-stdout");
#endif
#ifdef CONFIG_PIPE
strcat(version_string, "-pipe");
#endif
#ifdef HAVE_LIBSOXR
strcat(version_string, "-soxr");
#endif
#ifdef CONFIG_CONVOLUTION
strcat(version_string, "-convolution");
#endif
#ifdef CONFIG_METADATA
strcat(version_string, "-metadata");
#endif
strcat(version_string, "-sysconfdir:");
strcat(version_string, SYSCONFDIR);
}
return version_string;
}
void print_version(void) {
char *version_string = get_version_string();
if (version_string) {
printf("%s\n", version_string);
free(version_string);
} else {
debug(1, "Can't print version string!");
}
}
void usage(char *progname) {
printf("Usage: %s [options...]\n", progname);
printf(" or: %s [options...] -- [audio output-specific options]\n", progname);
printf("\n");
printf("Options:\n");
printf(" -h, --help show this help.\n");
printf(" -d, --daemon daemonise.\n");
printf(" -V, --version show version information.\n");
printf(" -k, --kill kill the existing shairport daemon.\n");
printf(" -D, --disconnectFromOutput disconnect immediately from the output device.\n");
printf(" -R, --reconnectToOutput reconnect to the output device.\n");
printf(" -c, --configfile=FILE read configuration settings from FILE. Default is "
"/etc/shairport-sync.conf.\n");
printf("\n");
printf("The following general options are for backward compatibility. These and all new options "
"have settings in the configuration file, by default /etc/shairport-sync.conf:\n");
printf(" -v, --verbose -v print debug information; -vv more; -vvv lots.\n");
printf(" -p, --port=PORT set RTSP listening port.\n");
printf(" -a, --name=NAME set advertised name.\n");
// printf(" -A, --AirPlayLatency=FRAMES [Deprecated] Set the latency for audio sent from an "
// "AirPlay device.\n");
// printf(" The default is to set it automatically.\n");
// printf(" -i, --iTunesLatency=FRAMES [Deprecated] Set the latency for audio sent from iTunes
// "
// "10 or later.\n");
// printf(" The default is to set it automatically.\n");
printf(" -L, --latency=FRAMES [Deprecated] Set the latency for audio sent from an unknown "
"device.\n");
printf(" The default is to set it automatically.\n");
printf(" --forkedDaapdLatency=FRAMES [Deprecated] Set the latency for audio sent from "
"forked-daapd.\n");
printf(" The default is to set it automatically.\n");
printf(" -S, --stuffing=MODE set how to adjust current latency to match desired latency, "
"where \n");
printf(" \"basic\" (default) inserts or deletes audio frames from "
"packet frames with low processor overhead, and \n");
printf(" \"soxr\" uses libsoxr to minimally resample packet frames -- "
"moderate processor overhead.\n");
printf(
" \"soxr\" option only available if built with soxr support.\n");
printf(" -B, --on-start=PROGRAM run PROGRAM when playback is about to begin.\n");
printf(" -E, --on-stop=PROGRAM run PROGRAM when playback has ended.\n");
printf(" For -B and -E options, specify the full path to the program, "
"e.g. /usr/bin/logger.\n");
printf(" Executable scripts work, but must have #!/bin/sh (or "
"whatever) in the headline.\n");
printf(
" -w, --wait-cmd wait until the -B or -E programs finish before continuing.\n");
printf(" -o, --output=BACKEND select audio output method.\n");
printf(" -m, --mdns=BACKEND force the use of BACKEND to advertize the service.\n");
printf(" if no mdns provider is specified,\n");
printf(" shairport tries them all until one works.\n");
printf(" -r, --resync=THRESHOLD [Deprecated] resync if error exceeds this number of frames. "
"Set to 0 to "
"stop resyncing.\n");
printf(" -t, --timeout=SECONDS go back to idle mode from play mode after a break in "
"communications of this many seconds (default 120). Set to 0 never to exit play mode.\n");
printf(" --statistics print some interesting statistics -- output to the logfile "
"if running as a daemon.\n");
printf(" --tolerance=TOLERANCE [Deprecated] allow a synchronization error of TOLERANCE "
"frames (default "
"88) before trying to correct it.\n");
printf(" --password=PASSWORD require PASSWORD to connect. Default is not to require a "
"password.\n");
#ifdef CONFIG_METADATA
printf(" --metadata-pipename=PIPE send metadata to PIPE, e.g. "
"--metadata-pipename=/tmp/shairport-sync-metadata.\n");
printf(" The default is /tmp/shairport-sync-metadata.\n");
printf(" --get-coverart send cover art through the metadata pipe.\n");
#endif
printf("\n");
mdns_ls_backends();
printf("\n");
audio_ls_outputs();
}
int parse_options(int argc, char **argv) {
// there are potential memory leaks here -- it's called a second time, previously allocated
// strings will dangle.
char *raw_service_name = NULL; /* Used to pick up the service name before possibly expanding it */
char *stuffing = NULL; /* used for picking up the stuffing option */
signed char c; /* used for argument parsing */
int i = 0; /* used for tracking options */
int fResyncthreshold = (int)(config.resyncthreshold * 44100);
int fTolerance = (int)(config.tolerance * 44100);
poptContext optCon; /* context for parsing command-line options */
struct poptOption optionsTable[] = {
{"verbose", 'v', POPT_ARG_NONE, NULL, 'v', NULL},
{"disconnectFromOutput", 'D', POPT_ARG_NONE, NULL, 0, NULL},
{"reconnectToOutput", 'R', POPT_ARG_NONE, NULL, 0, NULL},
{"kill", 'k', POPT_ARG_NONE, NULL, 0, NULL},
{"daemon", 'd', POPT_ARG_NONE, &config.daemonise, 0, NULL},
{"configfile", 'c', POPT_ARG_STRING, &config.configfile, 0, NULL},
{"statistics", 0, POPT_ARG_NONE, &config.statistics_requested, 0, NULL},
{"version", 'V', POPT_ARG_NONE, NULL, 0, NULL},
{"port", 'p', POPT_ARG_INT, &config.port, 0, NULL},
{"name", 'a', POPT_ARG_STRING, &raw_service_name, 0, NULL},
{"output", 'o', POPT_ARG_STRING, &config.output_name, 0, NULL},
{"on-start", 'B', POPT_ARG_STRING, &config.cmd_start, 0, NULL},
{"on-stop", 'E', POPT_ARG_STRING, &config.cmd_stop, 0, NULL},
{"wait-cmd", 'w', POPT_ARG_NONE, &config.cmd_blocking, 0, NULL},
{"mdns", 'm', POPT_ARG_STRING, &config.mdns_name, 0, NULL},
{"latency", 'L', POPT_ARG_INT, &config.userSuppliedLatency, 0, NULL},
{"AirPlayLatency", 'A', POPT_ARG_INT, &config.AirPlayLatency, 0, NULL},
{"iTunesLatency", 'i', POPT_ARG_INT, &config.iTunesLatency, 0, NULL},
{"forkedDaapdLatency", 'f', POPT_ARG_INT, &config.ForkedDaapdLatency, 0, NULL},
{"stuffing", 'S', POPT_ARG_STRING, &stuffing, 'S', NULL},
{"resync", 'r', POPT_ARG_INT, &fResyncthreshold, 0, NULL},
{"timeout", 't', POPT_ARG_INT, &config.timeout, 't', NULL},
{"password", 0, POPT_ARG_STRING, &config.password, 0, NULL},
{"tolerance", 'z', POPT_ARG_INT, &fTolerance, 0, NULL},
#ifdef CONFIG_METADATA
{"metadata-pipename", 'M', POPT_ARG_STRING, &config.metadata_pipename, 'M', NULL},
{"get-coverart", 'g', POPT_ARG_NONE, &config.get_coverart, 'g', NULL},
#endif
POPT_AUTOHELP{NULL, 0, 0, NULL, 0}};
// we have to parse the command line arguments to look for a config file
int optind;
optind = argc;
int j;
for (j = 0; j < argc; j++)
if (strcmp(argv[j], "--") == 0)
optind = j;
optCon = poptGetContext(NULL, optind, (const char **)argv, optionsTable, 0);
poptSetOtherOptionHelp(optCon, "[OPTIONS]* ");
/* Now do options processing just to get a debug level */
debuglev = 0;
while ((c = poptGetNextOpt(optCon)) >= 0) {
switch (c) {
case 'v':
debuglev++;
break;
case 'D':
inform("Warning: the option -D or --disconnectFromOutput is deprecated.");
break;
case 'R':
inform("Warning: the option -R or --reconnectToOutput is deprecated.");
break;
case 'A':
inform("Warning: the option -A or --AirPlayLatency is deprecated. This setting is now "
"automatically received from the AirPlay device.");
break;
case 'i':
inform("Warning: the option -i or --iTunesLatency is deprecated. This setting is now "
"automatically received from iTunes");
break;
case 'f':
inform("Warning: the option --forkedDaapdLatency is deprecated. This setting is now "
"automatically received from forkedDaapd");
break;
case 'r':
inform("Warning: the option -r or --resync is deprecated. Please use the "
"\"resync_threshold_in_seconds\" setting in the config file instead.");
break;
case 'z':
inform("Warning: the option --tolerance is deprecated. Please use the "
"\"drift_tolerance_in_seconds\" setting in the config file instead.");
break;
}
}
if (c < -1) {
die("%s: %s", poptBadOption(optCon, POPT_BADOPTION_NOALIAS), poptStrerror(c));
}
config.resyncthreshold = 1.0 * fResyncthreshold / 44100;
config.tolerance = 1.0 * fTolerance / 44100;
config_setting_t *setting;
const char *str = 0;
int value = 0;
double dvalue = 0.0;
debug(1, "Looking for the configuration file \"%s\".", config.configfile);
config_init(&config_file_stuff);
char *config_file_real_path = realpath(config.configfile, NULL);
if (config_file_real_path == NULL) {
debug(2, "Can't resolve the configuration file \"%s\".", config.configfile);
} else {
debug(2, "Looking for configuration file at full path \"%s\"", config_file_real_path);
/* Read the file. If there is an error, report it and exit. */
if (config_read_file(&config_file_stuff, config_file_real_path)) {
// make config.cfg point to it
config.cfg = &config_file_stuff;
/* Get the Service Name. */
if (config_lookup_string(config.cfg, "general.name", &str)) {
raw_service_name = (char *)str;
}
/* Get the Daemonize setting. */
if (config_lookup_string(config.cfg, "general.daemonize", &str)) {
if (strcasecmp(str, "no") == 0)
config.daemonise = 0;
else if (strcasecmp(str, "yes") == 0)
config.daemonise = 1;
else
die("Invalid daemonize option choice \"%s\". It should be \"yes\" or \"no\"");
}
/* Get the mdns_backend setting. */
if (config_lookup_string(config.cfg, "general.mdns_backend", &str))
config.mdns_name = (char *)str;
/* Get the output_backend setting. */
if (config_lookup_string(config.cfg, "general.output_backend", &str))
config.output_name = (char *)str;
/* Get the port setting. */
if (config_lookup_int(config.cfg, "general.port", &value)) {
if ((value < 0) || (value > 65535))
die("Invalid port number \"%sd\". It should be between 0 and 65535, default is 5000",
value);
else
config.port = value;
}
/* Get the udp port base setting. */
if (config_lookup_int(config.cfg, "general.udp_port_base", &value)) {
if ((value < 0) || (value > 65535))
die("Invalid port number \"%sd\". It should be between 0 and 65535, default is 6001",
value);
else
config.udp_port_base = value;
}
/* Get the udp port range setting. This is number of ports that will be tried for free ports ,
* starting at the port base. Only three ports are needed. */
if (config_lookup_int(config.cfg, "general.udp_port_range", &value)) {
if ((value < 0) || (value > 65535))
die("Invalid port range \"%sd\". It should be between 0 and 65535, default is 100",
value);
else
config.udp_port_range = value;
}
/* Get the password setting. */
if (config_lookup_string(config.cfg, "general.password", &str))
config.password = (char *)str;
if (config_lookup_string(config.cfg, "general.interpolation", &str)) {
if (strcasecmp(str, "basic") == 0)
config.packet_stuffing = ST_basic;
else if (strcasecmp(str, "soxr") == 0)
config.packet_stuffing = ST_soxr;
else
die("Invalid interpolation option choice. It should be \"basic\" or \"soxr\"");
}
/* Get the statistics setting. */
if (config_lookup_string(config.cfg, "general.statistics", &str)) {
if (strcasecmp(str, "no") == 0)
config.statistics_requested = 0;
else if (strcasecmp(str, "yes") == 0)
config.statistics_requested = 1;
else
die("Invalid statistics option choice \"%s\". It should be \"yes\" or \"no\"");
}
/* The old drift tolerance setting. */
if (config_lookup_int(config.cfg, "general.drift", &value)) {
inform("The drift setting is deprecated. Use "
"drift_tolerance_in_seconds instead");
config.tolerance = 1.0 * value / 44100;
}
/* The old resync setting. */
if (config_lookup_int(config.cfg, "general.resync_threshold", &value)) {
inform("The resync_threshold setting is deprecated. Use "
"resync_threshold_in_seconds instead");
config.resyncthreshold = 1.0 * value / 44100;
}
/* Get the drift tolerance setting. */
if (config_lookup_float(config.cfg, "general.drift_tolerance_in_seconds", &dvalue))
config.tolerance = dvalue;
/* Get the resync setting. */
if (config_lookup_float(config.cfg, "general.resync_threshold_in_seconds", &dvalue))
config.resyncthreshold = dvalue;
/* Get the verbosity setting. */
if (config_lookup_int(config.cfg, "general.log_verbosity", &value)) {
if ((value >= 0) && (value <= 3))
debuglev = value;
else
die("Invalid log verbosity setting option choice \"%d\". It should be between 0 and 3, "
"inclusive.",
value);
}
/* Get the ignore_volume_control setting. */
if (config_lookup_string(config.cfg, "general.ignore_volume_control", &str)) {
if (strcasecmp(str, "no") == 0)
config.ignore_volume_control = 0;
else if (strcasecmp(str, "yes") == 0)
config.ignore_volume_control = 1;
else
die("Invalid ignore_volume_control option choice \"%s\". It should be \"yes\" or \"no\"");
}
/* Get the optional volume_max_db setting. */
if (config_lookup_float(config.cfg, "general.volume_max_db", &dvalue)) {
debug(1, "Max volume setting of %f dB", dvalue);
config.volume_max_db = dvalue;
config.volume_max_db_set = 1;
}
/* Get the playback_mode setting */
if (config_lookup_string(config.cfg, "general.playback_mode", &str)) {
if (strcasecmp(str, "stereo") == 0)
config.playback_mode = ST_stereo;
else if (strcasecmp(str, "mono") == 0)
config.playback_mode = ST_mono;
else if (strcasecmp(str, "reverse stereo") == 0)
config.playback_mode = ST_reverse_stereo;
else if (strcasecmp(str, "both left") == 0)
config.playback_mode = ST_left_only;
else if (strcasecmp(str, "both right") == 0)
config.playback_mode = ST_right_only;
else
die("Invalid playback_mode choice \"%s\". It should be \"stereo\" (default), \"mono\", "
"\"reverse stereo\", \"both left\", \"both right\"");
}
/* Get the interface to listen on, if specified Default is all interfaces */
/* we keep the interface name and the index */
if (config_lookup_string(config.cfg, "general.interface", &str))
config.interface = strdup(str);
if (config_lookup_string(config.cfg, "general.interface", &str)) {
int specified_interface_found = 0;
struct if_nameindex *if_ni, *i;
if_ni = if_nameindex();
if (if_ni == NULL) {
debug(1, "Can't get a list of interface names.");
} else {
for (i = if_ni; !(i->if_index == 0 && i->if_name == NULL); i++) {
// printf("%u: %s\n", i->if_index, i->if_name);
if (strcmp(i->if_name, str) == 0) {
config.interface_index = i->if_index;
specified_interface_found = 1;
}
}
}
if_freenameindex(if_ni);
if (specified_interface_found == 0) {
inform(
"The mdns service interface \"%s\" was not found, so the setting has been ignored.",
config.interface);
free(config.interface);
config.interface = NULL;
config.interface_index = 0;
}
}
/* Get the regtype -- the service type and protocol, separated by a dot. Default is
* "_raop._tcp" */
if (config_lookup_string(config.cfg, "general.regtype", &str))
config.regtype = strdup(str);
/* Get the volume range, in dB, that should be used If not set, it means you just use the
* range set by the mixer. */
if (config_lookup_int(config.cfg, "general.volume_range_db", &value)) {
if ((value < 30) || (value > 150))
die("Invalid volume range \"%sd\". It should be between 30 and 150 dB. Zero means use "
"the mixer's native range",
value);
else
config.volume_range_db = value;
}
/* Get the alac_decoder setting. */
if (config_lookup_string(config.cfg, "general.alac_decoder", &str)) {
if (strcasecmp(str, "hammerton") == 0)
config.use_apple_decoder = 0;
else if (strcasecmp(str, "apple") == 0) {
if ((config.decoders_supported & 1 << decoder_apple_alac) != 0)
config.use_apple_decoder = 1;
else
inform("Support for the Apple ALAC decoder has not been compiled into this version of "
"Shairport Sync. The default decoder will be used.");
} else
die("Invalid alac_decoder option choice \"%s\". It should be \"hammerton\" or \"apple\"");
}
/* Get the default latency. Deprecated! */
if (config_lookup_int(config.cfg, "latencies.default", &value))
config.userSuppliedLatency = value;
/* Get the itunes latency. Deprecated! */
if (config_lookup_int(config.cfg, "latencies.itunes", &value))
config.iTunesLatency = value;
/* Get the AirPlay latency. Deprecated! */
if (config_lookup_int(config.cfg, "latencies.airplay", &value))
config.AirPlayLatency = value;
/* Get the forkedDaapd latency. Deprecated! */
if (config_lookup_int(config.cfg, "latencies.forkedDaapd", &value))
config.ForkedDaapdLatency = value;
#ifdef CONFIG_METADATA
/* Get the metadata setting. */
if (config_lookup_string(config.cfg, "metadata.enabled", &str)) {
if (strcasecmp(str, "no") == 0)
config.metadata_enabled = 0;
else if (strcasecmp(str, "yes") == 0)
config.metadata_enabled = 1;
else
die("Invalid metadata enabled option choice \"%s\". It should be \"yes\" or \"no\"");
}
if (config_lookup_string(config.cfg, "metadata.include_cover_art", &str)) {
if (strcasecmp(str, "no") == 0)
config.get_coverart = 0;
else if (strcasecmp(str, "yes") == 0)
config.get_coverart = 1;
else
die("Invalid metadata include_cover_art option choice \"%s\". It should be \"yes\" or "
"\"no\"");
}
if (config_lookup_string(config.cfg, "metadata.pipe_name", &str)) {
config.metadata_pipename = (char *)str;
}
if (config_lookup_string(config.cfg, "metadata.socket_address", &str)) {
config.metadata_sockaddr = (char *)str;
}
if (config_lookup_int(config.cfg, "metadata.socket_port", &value)) {
config.metadata_sockport = value;
}
config.metadata_sockmsglength = 500;
if (config_lookup_int(config.cfg, "metadata.socket_msglength", &value)) {
config.metadata_sockmsglength = value < 500 ? 500 : value > 65000 ? 65000 : value;
}
#endif
if (config_lookup_string(config.cfg, "sessioncontrol.run_this_before_play_begins", &str)) {
config.cmd_start = (char *)str;
}
if (config_lookup_string(config.cfg, "sessioncontrol.run_this_after_play_ends", &str)) {
config.cmd_stop = (char *)str;
}
if (config_lookup_string(config.cfg, "sessioncontrol.wait_for_completion", &str)) {
if (strcasecmp(str, "no") == 0)
config.cmd_blocking = 0;
else if (strcasecmp(str, "yes") == 0)
config.cmd_blocking = 1;
else
die("Invalid session control wait_for_completion option choice \"%s\". It should be "
"\"yes\" or \"no\"");
}
if (config_lookup_string(config.cfg, "sessioncontrol.allow_session_interruption", &str)) {
config.dont_check_timeout = 0; // this is for legacy -- only set by -t 0
if (strcasecmp(str, "no") == 0)
config.allow_session_interruption = 0;
else if (strcasecmp(str, "yes") == 0)
config.allow_session_interruption = 1;
else
die("Invalid session control allow_interruption option choice \"%s\". It should be "
"\"yes\" "
"or \"no\"");
}
if (config_lookup_int(config.cfg, "sessioncontrol.session_timeout", &value)) {
config.timeout = value;
config.dont_check_timeout = 0; // this is for legacy -- only set by -t 0
}
#ifdef CONFIG_CONVOLUTION
if (config_lookup_string(config.cfg, "dsp.convolution", &str)) {
if (strcasecmp(str, "no") == 0)
config.convolution = 0;
else if (strcasecmp(str, "yes") == 0)
config.convolution = 1;
else
die("Invalid dsp.convolution. It should be \"yes\" or \"no\"");
}
if (config_lookup_float(config.cfg, "dsp.convolution_gain", &dvalue)) {
config.convolution_gain = dvalue;
if (dvalue > 10 || dvalue < -50)
die("Invalid value \"%f\" for dsp.convolution_gain. It should be between -50 and +10 dB", dvalue);
}
config.convolution_max_length = 8192;
if (config_lookup_int(config.cfg, "dsp.convolution_max_length", &value)) {
config.convolution_max_length = value;
if (value < 1 || value > 200000)
die("dsp.convolution_max_length must be within 1 and 200000");
}
if (config_lookup_string(config.cfg, "dsp.convolution_ir_file", &str)) {
config.convolution_ir_file = str;
convolver_init(config.convolution_ir_file, config.convolution_max_length);
}
if (config.convolution && config.convolution_ir_file == NULL) {
die("Convolution enabled but no convolution_ir_file provided");
}
#endif
if (config_lookup_string(config.cfg, "dsp.loudness", &str)) {
if (strcasecmp(str, "no") == 0)
config.loudness = 0;
else if (strcasecmp(str, "yes") == 0)
config.loudness = 1;
else
die("Invalid dsp.convolution. It should be \"yes\" or \"no\"");
}
config.loudness_reference_volume_db = -20;
if (config_lookup_float(config.cfg, "dsp.loudness_reference_volume_db", &dvalue)) {
config.loudness_reference_volume_db = dvalue;
if (dvalue > 0 || dvalue < -100)
die("Invalid value \"%f\" for dsp.loudness_reference_volume_db. It should be between -100 and 0", dvalue);
}
if (config.loudness == 1 && config_lookup_string(config.cfg, "alsa.mixer_control_name", &str))
die("Loudness activated but hardware volume is active. You must remove \"alsa.mixer_control_name\" to use the loudness filter.");
} else {
if (config_error_type(&config_file_stuff) == CONFIG_ERR_FILE_IO)
debug(1, "Error reading configuration file \"%s\": \"%s\".",
config_error_file(&config_file_stuff), config_error_text(&config_file_stuff));
else {
die("Line %d of the configuration file \"%s\":\n%s", config_error_line(&config_file_stuff),
config_error_file(&config_file_stuff), config_error_text(&config_file_stuff));
}
}
free(config_file_real_path);
}
// now, do the command line options again, but this time do them fully -- it's a unix convention
// that command line
// arguments have precedence over configuration file settings.
optind = argc;
for (j = 0; j < argc; j++)
if (strcmp(argv[j], "--") == 0)
optind = j;
optCon = poptGetContext(NULL, optind, (const char **)argv, optionsTable, 0);
poptSetOtherOptionHelp(optCon, "[OPTIONS]* ");
/* Now do options processing, get portname */
int tdebuglev = 0;
while ((c = poptGetNextOpt(optCon)) >= 0) {
switch (c) {
case 'v':
tdebuglev++;
break;
case 't':
if (config.timeout == 0) {
config.dont_check_timeout = 1;
config.allow_session_interruption = 1;
} else {
config.dont_check_timeout = 0;
config.allow_session_interruption = 0;
}
break;
#ifdef CONFIG_METADATA
case 'M':
config.metadata_enabled = 1;
break;
case 'g':
if (config.metadata_enabled == 0)
die("If you want to get cover art, you must also select the --metadata-pipename option.");
break;
#endif
case 'S':
if (strcmp(stuffing, "basic") == 0)
config.packet_stuffing = ST_basic;
else if (strcmp(stuffing, "soxr") == 0)
#ifdef HAVE_LIBSOXR
config.packet_stuffing = ST_soxr;
#else
die("soxr option not available -- this version of shairport-sync was built without libsoxr "
"support");
#endif
else
die("Illegal stuffing option \"%s\" -- must be \"basic\" or \"soxr\"", stuffing);
break;
}
}
if (c < -1) {
die("%s: %s", poptBadOption(optCon, POPT_BADOPTION_NOALIAS), poptStrerror(c));
}
#ifdef CONFIG_METADATA
if ((config.metadata_enabled == 1) && (config.metadata_pipename == NULL))
config.metadata_pipename = strdup("/tmp/shairport-sync-metadata");
#endif
/* if the regtype hasn't been set, do it now */
if (config.regtype == NULL)
config.regtype = strdup("_raop._tcp");
if (tdebuglev != 0)
debuglev = tdebuglev;
/* if the Service Name wasn't specified, do it now */
if (raw_service_name == NULL)
raw_service_name = strdup("%H");
// now, do the substitutions in the service name
char hostname[100];
gethostname(hostname, 100);
char *i1 = str_replace(raw_service_name, "%h", hostname);
if ((hostname[0] >= 'a') && (hostname[0] <= 'z'))
hostname[0] = hostname[0] - 0x20; // convert a lowercase first letter into a capital letter
char *i2 = str_replace(i1, "%H", hostname);
char *i3 = str_replace(i2, "%v", PACKAGE_VERSION);
char *vs = get_version_string();
config.service_name = str_replace(i3, "%V", vs);
free(i1);
free(i2);
free(i3);
free(vs);
return optind + 1;
}
void signal_setup(void) {
// mask off all signals before creating threads.
// this way we control which thread gets which signals.
// for now, we don't care which thread gets the following.
sigset_t set;
sigfillset(&set);
sigdelset(&set, SIGINT);
sigdelset(&set, SIGTERM);
sigdelset(&set, SIGHUP);
sigdelset(&set, SIGSTOP);
sigdelset(&set, SIGCHLD);
sigdelset(&set, SIGUSR2);
pthread_sigmask(SIG_BLOCK, &set, NULL);
// setting this to SIG_IGN would prevent signalling any threads.
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_flags = SA_SIGINFO;
sa.sa_sigaction = &sig_ignore;
sigaction(SIGUSR1, &sa, NULL);
sa.sa_flags = SA_SIGINFO | SA_RESTART;
sa.sa_sigaction = &sig_shutdown;
sigaction(SIGINT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
sa.sa_sigaction = &sig_disconnect_audio_output;
sigaction(SIGUSR2, &sa, NULL);
sa.sa_sigaction = &sig_connect_audio_output;
sigaction(SIGHUP, &sa, NULL);
sa.sa_sigaction = &sig_child;
sigaction(SIGCHLD, &sa, NULL);
}
// forked daemon lets the spawner know it's up and running OK
// should be called only once!
void shairport_startup_complete(void) {
if (config.daemonise) {
// daemon_ready();
}
}
#ifdef USE_CUSTOM_PID_DIR
const char *pid_file_proc(void) {
#ifdef HAVE_ASPRINTF
static char *fn = NULL;
asprintf(&fn, "%s/%s.pid", PIDDIR, daemon_pid_file_ident ? daemon_pid_file_ident : "unknown");
#else
static char fn[8192];
snprintf(fn, sizeof(fn), "%s/%s.pid", PIDDIR,
daemon_pid_file_ident ? daemon_pid_file_ident : "unknown");
#endif
return fn;
}
#endif
void exit_function() {
if (config.cfg)
config_destroy(config.cfg);
// probably should be freeing malloc'ed memory here, including strdup-created strings...
}
int main(int argc, char **argv) {
daemon_set_verbosity(LOG_DEBUG);
memset(&config, 0, sizeof(config)); // also clears all strings, BTW
atexit(exit_function);
// this is a bit weird, but apparently necessary
char *basec = strdup(argv[0]);
char *bname = basename(basec);
appName = strdup(bname);
free(basec);
// set defaults
// get thje endianness
union {
uint32_t u32;
uint8_t arr[4];
} xn;
xn.arr[0] = 0x44; /* Lowest-address byte */
xn.arr[1] = 0x33;
xn.arr[2] = 0x22;
xn.arr[3] = 0x11; /* Highest-address byte */
if (xn.u32 == 0x11223344)
endianness = SS_LITTLE_ENDIAN;
else if (xn.u32 == 0x33441122)
endianness = SS_PDP_ENDIAN;
else if (xn.u32 == 0x44332211)
endianness = SS_BIG_ENDIAN;
else
die("Can not recognise the endianness of the processor.");
strcpy(configuration_file_path, SYSCONFDIR);
strcat(configuration_file_path, "/");
strcat(configuration_file_path, appName);
strcat(configuration_file_path, ".conf");
config.configfile = configuration_file_path;
config.statistics_requested = 0; // don't print stats in the log
config.latency = -1; // -1 means not set. 88200 works well. This is also reset in rtsp.c when play
// is about to start
config.userSuppliedLatency = 0; // zero means none supplied
config.iTunesLatency =
-1; // -1 means not supplied. 99400 seems to work pretty well for iTunes from Version 10 (?)
// upwards-- two left-ear headphones, one from the iMac jack, one
// from an NSLU2 running a cheap "3D Sound" USB Soundcard
config.AirPlayLatency =
-1; // -1 means not set. 88200 seems to work well for AirPlay -- Syncs sound and
// vision on AppleTV, but also used for iPhone/iPod/iPad sources
config.ForkedDaapdLatency = -1; // -1 means not set. 99400 seems to be right
config.resyncthreshold = 0.05; // 50 ms
config.timeout = 120; // this number of seconds to wait for [more] audio before switching to idle.
config.tolerance =
0.002; // this number of seconds of timing error before attempting to correct it.
config.buffer_start_fill = 220;
config.port = 5000;
config.packet_stuffing = ST_basic; // simple interpolation or deletion
// char hostname[100];
// gethostname(hostname, 100);
// config.service_name = malloc(20 + 100);
// snprintf(config.service_name, 20 + 100, "Shairport Sync on %s", hostname);
set_requested_connection_state_to_output(
1); // we expect to be able to connect to the output device
config.audio_backend_buffer_desired_length = 6615; // 0.15 seconds.
config.udp_port_base = 6001;
config.udp_port_range = 100;
config.output_format = SPS_FORMAT_S16; // default
config.output_rate = 44100; // default
config.decoders_supported =
1 << decoder_hammerton; // David Hammerton's decoder supported by default
#ifdef HAVE_APPLE_ALAC
config.decoders_supported += 1 << decoder_apple_alac;
#endif
// initialise random number generator
r64init(0);
// initialise the randomw number array
r64arrayinit();
/* Check if we are called with -V or --version parameter */
if (argc >= 2 && ((strcmp(argv[1], "-V") == 0) || (strcmp(argv[1], "--version") == 0))) {
print_version();
exit(1);
}
/* Check if we are called with -h or --help parameter */
if (argc >= 2 && ((strcmp(argv[1], "-h") == 0) || (strcmp(argv[1], "--help") == 0))) {
usage(argv[0]);
exit(1);
}
pid_t pid;
/* Reset signal handlers */
if (daemon_reset_sigs(-1) < 0) {
daemon_log(LOG_ERR, "Failed to reset all signal handlers: %s", strerror(errno));
return 1;
}
/* Unblock signals */