aboutsummaryrefslogtreecommitdiffstats
path: root/src/Main.cxx
blob: 3cedfe2676b096f02256bec4f6c660407a3d556e (plain) (blame)
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
/*
 * Copyright (C) 2003-2014 The Music Player Daemon Project
 * http://www.musicpd.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"
#include "Main.hxx"
#include "Instance.hxx"
#include "CommandLine.hxx"
#include "PlaylistFile.hxx"
#include "PlaylistGlobal.hxx"
#include "MusicChunk.hxx"
#include "StateFile.hxx"
#include "PlayerThread.hxx"
#include "Mapper.hxx"
#include "Permission.hxx"
#include "Listen.hxx"
#include "client/Client.hxx"
#include "client/ClientList.hxx"
#include "command/AllCommands.hxx"
#include "Partition.hxx"
#include "mixer/Volume.hxx"
#include "tag/TagConfig.hxx"
#include "ReplayGainConfig.hxx"
#include "Idle.hxx"
#include "Log.hxx"
#include "LogInit.hxx"
#include "GlobalEvents.hxx"
#include "input/Init.hxx"
#include "event/Loop.hxx"
#include "IOThread.hxx"
#include "fs/AllocatedPath.hxx"
#include "fs/Config.hxx"
#include "fs/StandardDirectory.hxx"
#include "playlist/PlaylistRegistry.hxx"
#include "zeroconf/ZeroconfGlue.hxx"
#include "decoder/DecoderList.hxx"
#include "AudioConfig.hxx"
#include "pcm/PcmConvert.hxx"
#include "unix/SignalHandlers.hxx"
#include "unix/Daemon.hxx"
#include "system/FatalError.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include "thread/Id.hxx"
#include "thread/Slack.hxx"
#include "config/ConfigGlobal.hxx"
#include "config/ConfigData.hxx"
#include "config/ConfigDefaults.hxx"
#include "config/ConfigOption.hxx"
#include "Stats.hxx"

#ifdef ENABLE_DATABASE
#include "db/update/Service.hxx"
#include "db/DatabaseGlue.hxx"
#include "db/DatabaseSimple.hxx"
#include "db/plugins/SimpleDatabasePlugin.hxx"
#endif

#ifdef ENABLE_NEIGHBOR_PLUGINS
#include "neighbor/Glue.hxx"
#endif

#ifdef ENABLE_INOTIFY
#include "db/update/InotifyUpdate.hxx"
#endif

#ifdef ENABLE_SQLITE
#include "sticker/StickerDatabase.hxx"
#endif

#ifdef ENABLE_ARCHIVE
#include "archive/ArchiveList.hxx"
#endif

#ifdef HAVE_GLIB
#include <glib.h>
#endif

#include <stdlib.h>

#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif

#ifdef WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#endif

#include <limits.h>

static constexpr unsigned DEFAULT_BUFFER_SIZE = 4096;
static constexpr unsigned DEFAULT_BUFFER_BEFORE_PLAY = 10;

static constexpr Domain main_domain("main");

ThreadId main_thread;
EventLoop *main_loop;

Instance *instance;

static StateFile *state_file;

static bool
glue_daemonize_init(const struct options *options, Error &error)
{
	auto pid_file = config_get_path(CONF_PID_FILE, error);
	if (pid_file.IsNull() && error.IsDefined())
		return false;

	daemonize_init(config_get_string(CONF_USER, nullptr),
		       config_get_string(CONF_GROUP, nullptr),
		       std::move(pid_file));

	if (options->kill)
		daemonize_kill();

	return true;
}

static bool
glue_mapper_init(Error &error)
{
	auto music_dir = config_get_path(CONF_MUSIC_DIR, error);
	if (music_dir.IsNull() && error.IsDefined())
		return false;

	auto playlist_dir = config_get_path(CONF_PLAYLIST_DIR, error);
	if (playlist_dir.IsNull() && error.IsDefined())
		return false;

	if (music_dir.IsNull()) {
		music_dir = GetUserMusicDir();
		if (music_dir.IsNull())
			return true;
	}

	mapper_init(std::move(music_dir), std::move(playlist_dir));
	return true;
}

#ifdef ENABLE_DATABASE

/**
 * Returns the database.  If this function returns false, this has not
 * succeeded, and the caller should create the database after the
 * process has been daemonized.
 */
static bool
glue_db_init_and_load(void)
{
	const struct config_param *param = config_get_param(CONF_DATABASE);
	const struct config_param *path = config_get_param(CONF_DB_FILE);

	if (param != nullptr && path != nullptr)
		LogWarning(main_domain,
			   "Found both 'database' and 'db_file' setting - ignoring the latter");

	if (!mapper_has_music_directory()) {
		if (param != nullptr)
			LogDefault(main_domain,
				   "Found database setting without "
				   "music_directory - disabling database");
		if (path != nullptr)
			LogDefault(main_domain,
				   "Found db_file setting without "
				   "music_directory - disabling database");
		return true;
	}

	struct config_param *allocated = nullptr;

	if (param == nullptr && path != nullptr) {
		allocated = new config_param("database", path->line);
		allocated->AddBlockParam("path", path->value.c_str(),
					 path->line);
		param = allocated;
	}

	if (param == nullptr)
		return true;

	Error error;
	if (!DatabaseGlobalInit(*main_loop, *instance, *param, error))
		FatalError(error);

	delete allocated;

	if (!DatabaseGlobalOpen(error))
		FatalError(error);

	/* run database update after daemonization? */
	return !db_is_simple() || db_exists();
}

#endif

/**
 * Configure and initialize the sticker subsystem.
 */
static void
glue_sticker_init(void)
{
#ifdef ENABLE_SQLITE
	Error error;
	auto sticker_file = config_get_path(CONF_STICKER_FILE, error);
	if (sticker_file.IsNull()) {
		if (error.IsDefined())
			FatalError(error);
		return;
	}

	if (!sticker_global_init(std::move(sticker_file), error))
		FatalError(error);
#endif
}

static bool
glue_state_file_init(Error &error)
{
	auto path_fs = config_get_path(CONF_STATE_FILE, error);
	if (path_fs.IsNull())
		return !error.IsDefined();

	state_file = new StateFile(std::move(path_fs),
				   *instance->partition, *main_loop);
	state_file->Read();
	return true;
}

/**
 * Windows-only initialization of the Winsock2 library.
 */
static void winsock_init(void)
{
#ifdef WIN32
	WSADATA sockinfo;

	int retval = WSAStartup(MAKEWORD(2, 2), &sockinfo);
	if(retval != 0)
		FormatFatalError("Attempt to open Winsock2 failed; error code %d",
				 retval);

	if (LOBYTE(sockinfo.wVersion) != 2)
		FatalError("We use Winsock2 but your version is either too new "
			   "or old; please install Winsock 2.x");
#endif
}

/**
 * Initialize the decoder and player core, including the music pipe.
 */
static void
initialize_decoder_and_player(void)
{
	const struct config_param *param;

	size_t buffer_size;
	param = config_get_param(CONF_AUDIO_BUFFER_SIZE);
	if (param != nullptr) {
		char *test;
		long tmp = strtol(param->value.c_str(), &test, 10);
		if (*test != '\0' || tmp <= 0 || tmp == LONG_MAX)
			FormatFatalError("buffer size \"%s\" is not a "
					 "positive integer, line %i",
					 param->value.c_str(), param->line);
		buffer_size = tmp;
	} else
		buffer_size = DEFAULT_BUFFER_SIZE;

	buffer_size *= 1024;

	const unsigned buffered_chunks = buffer_size / CHUNK_SIZE;

	if (buffered_chunks >= 1 << 15)
		FormatFatalError("buffer size \"%lu\" is too big",
				 (unsigned long)buffer_size);

	float perc;
	param = config_get_param(CONF_BUFFER_BEFORE_PLAY);
	if (param != nullptr) {
		char *test;
		perc = strtod(param->value.c_str(), &test);
		if (*test != '%' || perc < 0 || perc > 100) {
			FormatFatalError("buffered before play \"%s\" is not "
					 "a positive percentage and less "
					 "than 100 percent, line %i",
					 param->value.c_str(), param->line);
		}
	} else
		perc = DEFAULT_BUFFER_BEFORE_PLAY;

	unsigned buffered_before_play = (perc / 100) * buffered_chunks;
	if (buffered_before_play > buffered_chunks)
		buffered_before_play = buffered_chunks;

	const unsigned max_length =
		config_get_positive(CONF_MAX_PLAYLIST_LENGTH,
				    DEFAULT_PLAYLIST_MAX_LENGTH);

	instance->partition = new Partition(*instance,
					    max_length,
					    buffered_chunks,
					    buffered_before_play);
}

/**
 * Handler for GlobalEvents::IDLE.
 */
static void
idle_event_emitted(void)
{
	/* send "idle" notifications to all subscribed
	   clients */
	unsigned flags = idle_get();
	if (flags != 0)
		instance->client_list->IdleAdd(flags);

	if (flags & (IDLE_PLAYLIST|IDLE_PLAYER|IDLE_MIXER|IDLE_OUTPUT) &&
	    state_file != nullptr)
		state_file->CheckModified();
}

#ifdef WIN32

/**
 * Handler for GlobalEvents::SHUTDOWN.
 */
static void
shutdown_event_emitted(void)
{
	main_loop->Break();
}

#endif

int main(int argc, char *argv[])
{
#ifdef WIN32
	return win32_main(argc, argv);
#else
	return mpd_main(argc, argv);
#endif
}

int mpd_main(int argc, char *argv[])
{
	struct options options;
	Error error;

	daemonize_close_stdin();

#ifdef HAVE_LOCALE_H
	/* initialize locale */
	setlocale(LC_CTYPE,"");
#endif

#ifdef HAVE_GLIB
	g_set_application_name("Music Player Daemon");

#if !GLIB_CHECK_VERSION(2,32,0)
	/* enable GLib's thread safety code */
	g_thread_init(nullptr);
#endif
#endif

	winsock_init();
	io_thread_init();
	config_global_init();

	if (!parse_cmdline(argc, argv, &options, error)) {
		LogError(error);
		return EXIT_FAILURE;
	}

	if (!glue_daemonize_init(&options, error)) {
		LogError(error);
		return EXIT_FAILURE;
	}

	stats_global_init();
	TagLoadConfig();

	if (!log_init(options.verbose, options.log_stderr, error)) {
		LogError(error);
		return EXIT_FAILURE;
	}

	main_thread = ThreadId::GetCurrent();
	main_loop = new EventLoop(EventLoop::Default());

	instance = new Instance();

#ifdef ENABLE_NEIGHBOR_PLUGINS
	instance->neighbors = new NeighborGlue();
	if (!instance->neighbors->Init(io_thread_get(), *instance, error)) {
		LogError(error);
		return EXIT_FAILURE;
	}

	if (instance->neighbors->IsEmpty()) {
		delete instance->neighbors;
		instance->neighbors = nullptr;
	}
#endif

	const unsigned max_clients = config_get_positive(CONF_MAX_CONN, 10);
	instance->client_list = new ClientList(max_clients);

	if (!listen_global_init(*main_loop, error)) {
		LogError(error);
		return EXIT_FAILURE;
	}

	daemonize_set_user();
	daemonize_begin(options.daemon);

	GlobalEvents::Initialize(*main_loop);
	GlobalEvents::Register(GlobalEvents::IDLE, idle_event_emitted);
#ifdef WIN32
	GlobalEvents::Register(GlobalEvents::SHUTDOWN, shutdown_event_emitted);
#endif

	ConfigureFS();

	if (!glue_mapper_init(error)) {
		LogError(error);
		return EXIT_FAILURE;
	}

	initPermissions();
	playlist_global_init();
	spl_global_init();
#ifdef ENABLE_ARCHIVE
	archive_plugin_init_all();
#endif

	if (!pcm_convert_global_init(error)) {
		LogError(error);
		return EXIT_FAILURE;
	}

	decoder_plugin_init_all();

#ifdef ENABLE_DATABASE
	const bool create_db = !glue_db_init_and_load();

	instance->update = db_is_simple()
		? new UpdateService(*main_loop, db_get_simple())
		: nullptr;
#endif

	glue_sticker_init();

	command_init();
	initialize_decoder_and_player();
	volume_init();
	initAudioConfig();
	instance->partition->outputs.Configure(instance->partition->pc);
	client_manager_init();
	replay_gain_global_init();

	if (!input_stream_global_init(error)) {
		LogError(error);
		return EXIT_FAILURE;
	}

	playlist_list_global_init();

	daemonize_commit();

	setup_log_output(options.log_stderr);

	SignalHandlersInit(*main_loop);

	io_thread_start();

#ifdef ENABLE_NEIGHBOR_PLUGINS
	if (instance->neighbors != nullptr &&
	    !instance->neighbors->Open(error))
		FatalError(error);
#endif

	ZeroconfInit(*main_loop);

	player_create(instance->partition->pc);

#ifdef ENABLE_DATABASE
	if (create_db) {
		/* the database failed to load: recreate the
		   database */
		unsigned job = instance->update->Enqueue("", true);
		if (job == 0)
			FatalError("directory update failed");
	}
#endif

	if (!glue_state_file_init(error)) {
		LogError(error);
		return EXIT_FAILURE;
	}

	instance->partition->outputs.SetReplayGainMode(replay_gain_get_real_mode(instance->partition->playlist.queue.random));

	if (config_get_bool(CONF_AUTO_UPDATE, false)) {
#ifdef ENABLE_INOTIFY
		if (mapper_has_music_directory() &&
		    instance->update != nullptr)
			mpd_inotify_init(*main_loop, *instance->update,
					 config_get_unsigned(CONF_AUTO_UPDATE_DEPTH,
							     G_MAXUINT));
#else
		FormatWarning(main_domain,
			      "inotify: auto_update was disabled. enable during compilation phase");
#endif
	}

	config_global_check();

	/* enable all audio outputs (if not already done by
	   playlist_state_restore() */
	instance->partition->pc.UpdateAudio();

#ifdef WIN32
	win32_app_started();
#endif

	/* the MPD frontend does not care about timer slack; set it to
	   a huge value to allow the kernel to reduce CPU wakeups */
	SetThreadTimerSlackMS(100);

	/* run the main loop */
	main_loop->Run();

#ifdef WIN32
	win32_app_stopping();
#endif

	/* cleanup */

#ifdef ENABLE_INOTIFY
	mpd_inotify_finish();
#endif

	if (state_file != nullptr) {
		state_file->Write();
		delete state_file;
	}

	instance->partition->pc.Kill();
	ZeroconfDeinit();
	listen_global_finish();
	delete instance->client_list;

#ifdef ENABLE_NEIGHBOR_PLUGINS
	if (instance->neighbors != nullptr) {
		instance->neighbors->Close();
		delete instance->neighbors;
	}
#endif

#ifdef ENABLE_DATABASE
	delete instance->update;

	DatabaseGlobalDeinit();
#endif

#ifdef ENABLE_SQLITE
	sticker_global_finish();
#endif

	GlobalEvents::Deinitialize();

	playlist_list_global_finish();
	input_stream_global_finish();

#ifdef ENABLE_DATABASE
	mapper_finish();
#endif

	delete instance->partition;
	command_finish();
	decoder_plugin_deinit_all();
#ifdef ENABLE_ARCHIVE
	archive_plugin_deinit_all();
#endif
	config_global_finish();
	io_thread_deinit();
	SignalHandlersFinish();
	delete instance;
	delete main_loop;
	daemonize_finish();
#ifdef WIN32
	WSACleanup();
#endif

	log_deinit();
	return EXIT_SUCCESS;
}