mpd/src/Main.cxx
2018-07-17 23:09:56 +02:00

761 lines
17 KiB
C++

/*
* Copyright 2003-2017 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 "MusicChunk.hxx"
#include "StateFile.hxx"
#include "player/Thread.hxx"
#include "Mapper.hxx"
#include "Permission.hxx"
#include "Listen.hxx"
#include "client/Listener.hxx"
#include "client/Client.hxx"
#include "client/ClientList.hxx"
#include "command/AllCommands.hxx"
#include "Partition.hxx"
#include "tag/Config.hxx"
#include "ReplayGainGlobal.hxx"
#include "Idle.hxx"
#include "Log.hxx"
#include "LogInit.hxx"
#include "input/Init.hxx"
#include "event/Loop.hxx"
#include "fs/AllocatedPath.hxx"
#include "fs/Config.hxx"
#include "playlist/PlaylistRegistry.hxx"
#include "zeroconf/ZeroconfGlue.hxx"
#include "decoder/DecoderList.hxx"
#include "AudioParser.hxx"
#include "pcm/PcmConvert.hxx"
#include "unix/SignalHandlers.hxx"
#include "system/FatalError.hxx"
#include "thread/Slack.hxx"
#include "net/Init.hxx"
#include "lib/icu/Init.hxx"
#include "config/Global.hxx"
#include "config/Data.hxx"
#include "config/Param.hxx"
#include "config/Defaults.hxx"
#include "config/Option.hxx"
#include "config/Domain.hxx"
#include "util/RuntimeError.hxx"
#ifdef ENABLE_DAEMON
#include "unix/Daemon.hxx"
#endif
#ifdef ENABLE_DATABASE
#include "db/update/Service.hxx"
#include "db/Configured.hxx"
#include "db/DatabasePlugin.hxx"
#include "db/plugins/simple/SimpleDatabasePlugin.hxx"
#include "storage/Configured.hxx"
#include "storage/CompositeStorage.hxx"
#ifdef ENABLE_INOTIFY
#include "db/update/InotifyUpdate.hxx"
#endif
#endif
#ifdef ENABLE_NEIGHBOR_PLUGINS
#include "neighbor/Glue.hxx"
#endif
#ifdef ENABLE_SQLITE
#include "sticker/StickerDatabase.hxx"
#endif
#ifdef ENABLE_ARCHIVE
#include "archive/ArchiveList.hxx"
#endif
#ifdef ANDROID
#include "java/Global.hxx"
#include "java/File.hxx"
#include "android/Environment.hxx"
#include "android/Context.hxx"
#include "fs/StandardDirectory.hxx"
#include "fs/FileSystem.hxx"
#include "org_musicpd_Bridge.h"
#endif
#ifdef ENABLE_SYSTEMD_DAEMON
#include <systemd/sd-daemon.h>
#endif
#ifdef ENABLE_DBUS
#include <dbus/dbus.h>
#endif
#include <stdlib.h>
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#include <limits.h>
static constexpr size_t KILOBYTE = 1024;
static constexpr size_t MEGABYTE = 1024 * KILOBYTE;
static constexpr size_t DEFAULT_BUFFER_SIZE = 4 * MEGABYTE;
static constexpr
size_t MIN_BUFFER_SIZE = std::max(CHUNK_SIZE * 32,
64 * KILOBYTE);
static constexpr unsigned DEFAULT_BUFFER_BEFORE_PLAY = 10;
#ifdef ANDROID
Context *context;
#endif
Instance *instance;
struct Config {
ReplayGainConfig replay_gain;
};
static Config
LoadConfig(const ConfigData &config)
{
return {LoadReplayGainConfig(config)};
}
#ifdef ENABLE_DAEMON
static void
glue_daemonize_init(const struct options *options,
const ConfigData &config)
{
daemonize_init(config.GetString(ConfigOption::USER),
config.GetString(ConfigOption::GROUP),
config.GetPath(ConfigOption::PID_FILE));
if (options->kill)
daemonize_kill();
}
#endif
static void
glue_mapper_init(const ConfigData &config)
{
mapper_init(config.GetPath(ConfigOption::PLAYLIST_DIR));
}
#ifdef ENABLE_DATABASE
static void
InitStorage(const ConfigData &config, EventLoop &event_loop)
{
auto storage = CreateConfiguredStorage(config, event_loop);
if (storage == nullptr)
return;
CompositeStorage *composite = new CompositeStorage();
instance->storage = composite;
composite->Mount("", std::move(storage));
}
/**
* 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(const ConfigData &config)
{
instance->database =
CreateConfiguredDatabase(config, instance->event_loop,
instance->io_thread.GetEventLoop(),
*instance);
if (instance->database == nullptr)
return true;
if (instance->database->GetPlugin().flags & DatabasePlugin::FLAG_REQUIRE_STORAGE) {
InitStorage(config, instance->io_thread.GetEventLoop());
if (instance->storage == nullptr) {
delete instance->database;
instance->database = nullptr;
LogDefault(config_domain,
"Found database setting without "
"music_directory - disabling database");
return true;
}
} else {
if (IsStorageConfigured(config))
LogDefault(config_domain,
"Ignoring the storage configuration "
"because the database does not need it");
}
try {
instance->database->Open();
} catch (...) {
std::throw_with_nested(std::runtime_error("Failed to open database plugin"));
}
if (!instance->database->IsPlugin(simple_db_plugin))
return true;
SimpleDatabase &db = *(SimpleDatabase *)instance->database;
instance->update = new UpdateService(config,
instance->event_loop, db,
static_cast<CompositeStorage &>(*instance->storage),
*instance);
/* run database update after daemonization? */
return db.FileExists();
}
static bool
InitDatabaseAndStorage(const ConfigData &config)
{
const bool create_db = !glue_db_init_and_load(config);
return create_db;
}
#endif
/**
* Configure and initialize the sticker subsystem.
*/
static void
glue_sticker_init(const ConfigData &config)
{
#ifdef ENABLE_SQLITE
auto sticker_file = config.GetPath(ConfigOption::STICKER_FILE);
if (sticker_file.IsNull())
return;
sticker_global_init(std::move(sticker_file));
#else
(void)config;
#endif
}
static void
glue_state_file_init(const ConfigData &config)
{
auto path_fs = config.GetPath(ConfigOption::STATE_FILE);
if (path_fs.IsNull()) {
#ifdef ANDROID
const auto cache_dir = GetUserCacheDir();
if (cache_dir.IsNull())
return;
path_fs = cache_dir / Path::FromFS("state");
#else
return;
#endif
}
const auto interval =
config.GetUnsigned(ConfigOption::STATE_FILE_INTERVAL,
StateFile::DEFAULT_INTERVAL);
instance->state_file = new StateFile(std::move(path_fs), interval,
instance->partitions.front(),
instance->event_loop);
instance->state_file->Read();
}
/**
* Initialize the decoder and player core, including the music pipe.
*/
static void
initialize_decoder_and_player(const ConfigData &config,
const ReplayGainConfig &replay_gain_config)
{
const ConfigParam *param;
size_t buffer_size;
param = config.GetParam(ConfigOption::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 * KILOBYTE;
if (buffer_size < MIN_BUFFER_SIZE) {
FormatWarning(config_domain, "buffer size %lu is too small, using %lu bytes instead",
(unsigned long)buffer_size,
(unsigned long)MIN_BUFFER_SIZE);
buffer_size = MIN_BUFFER_SIZE;
}
} else
buffer_size = DEFAULT_BUFFER_SIZE;
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.GetParam(ConfigOption::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);
}
if (perc > 80) {
/* this upper limit should avoid deadlocks
which can occur because the DecoderThread
cannot ever fill the music buffer to
exactly 100%; a few chunks always need to
be available to generate silence in
Player::SendSilence() */
FormatError(config_domain,
"buffer_before_play is too large (%f%%), capping at 80%%; please fix your configuration",
perc);
perc = 80;
}
} 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.GetPositive(ConfigOption::MAX_PLAYLIST_LENGTH,
DEFAULT_PLAYLIST_MAX_LENGTH);
AudioFormat configured_audio_format = AudioFormat::Undefined();
param = config.GetParam(ConfigOption::AUDIO_OUTPUT_FORMAT);
if (param != nullptr) {
try {
configured_audio_format = ParseAudioFormat(param->value.c_str(),
true);
} catch (...) {
std::throw_with_nested(FormatRuntimeError("error parsing line %i",
param->line));
}
}
instance->partitions.emplace_back(*instance,
"default",
max_length,
buffered_chunks,
buffered_before_play,
configured_audio_format,
replay_gain_config);
auto &partition = instance->partitions.back();
try {
param = config.GetParam(ConfigOption::REPLAYGAIN);
if (param != nullptr)
partition.replay_gain_mode =
FromString(param->value.c_str());
} catch (...) {
std::throw_with_nested(FormatRuntimeError("Failed to parse line %i",
param->line));
}
}
inline void
Instance::BeginShutdownUpdate() noexcept
{
#ifdef ENABLE_DATABASE
#ifdef ENABLE_INOTIFY
mpd_inotify_finish();
#endif
if (update != nullptr)
update->CancelAllAsync();
#endif
}
inline void
Instance::FinishShutdownUpdate() noexcept
{
#ifdef ENABLE_DATABASE
delete update;
#endif
}
inline void
Instance::ShutdownDatabase() noexcept
{
#ifdef ENABLE_DATABASE
if (instance->database != nullptr) {
instance->database->Close();
delete instance->database;
}
delete instance->storage;
#endif
}
inline void
Instance::BeginShutdownPartitions() noexcept
{
for (auto &partition : partitions) {
partition.pc.Kill();
partition.listener.reset();
}
}
inline void
Instance::FinishShutdownPartitions() noexcept
{
partitions.clear();
}
void
Instance::OnIdle(unsigned flags)
{
/* send "idle" notifications to all subscribed
clients */
client_list->IdleAdd(flags);
if (flags & (IDLE_PLAYLIST|IDLE_PLAYER|IDLE_MIXER|IDLE_OUTPUT) &&
state_file != nullptr)
state_file->CheckModified();
}
#ifndef ANDROID
int main(int argc, char *argv[])
{
#ifdef _WIN32
return win32_main(argc, argv);
#else
return mpd_main(argc, argv);
#endif
}
#endif
static int
mpd_main_after_fork(const ConfigData &raw_config, const Config &config);
#ifdef ANDROID
static inline
#endif
int mpd_main(int argc, char *argv[])
try {
struct options options;
#ifdef ENABLE_DAEMON
daemonize_close_stdin();
#endif
#ifndef ANDROID
#ifdef HAVE_LOCALE_H
/* initialize locale */
setlocale(LC_CTYPE,"");
setlocale(LC_COLLATE, "");
#endif
#endif
IcuInit();
const ScopeNetInit net_init;
config_global_init();
#ifdef ANDROID
(void)argc;
(void)argv;
const auto sdcard = Environment::getExternalStorageDirectory();
if (!sdcard.IsNull()) {
const auto config_path =
sdcard / Path::FromFS("mpd.conf");
if (FileExists(config_path))
ReadConfigFile(config_path);
}
#else
ParseCommandLine(argc, argv, options);
#endif
const auto &raw_config = GetGlobalConfig();
const auto config = LoadConfig(raw_config);
#ifdef ENABLE_DAEMON
glue_daemonize_init(&options, raw_config);
#endif
TagLoadConfig(raw_config);
log_init(raw_config, options.verbose, options.log_stderr);
instance = new Instance();
#ifdef ENABLE_NEIGHBOR_PLUGINS
instance->neighbors = new NeighborGlue();
instance->neighbors->Init(instance->io_thread.GetEventLoop(),
*instance);
if (instance->neighbors->IsEmpty()) {
delete instance->neighbors;
instance->neighbors = nullptr;
}
#endif
const unsigned max_clients =
raw_config.GetPositive(ConfigOption::MAX_CONN, 10);
instance->client_list = new ClientList(max_clients);
initialize_decoder_and_player(raw_config, config.replay_gain);
listen_global_init(raw_config, *instance->partitions.front().listener);
#ifdef ENABLE_DAEMON
daemonize_set_user();
daemonize_begin(options.daemon);
#endif
return mpd_main_after_fork(raw_config, config);
} catch (const std::exception &e) {
LogError(e);
return EXIT_FAILURE;
}
static int
mpd_main_after_fork(const ConfigData &raw_config, const Config &config)
try {
ConfigureFS(raw_config);
glue_mapper_init(raw_config);
initPermissions(raw_config);
spl_global_init(raw_config);
#ifdef ENABLE_ARCHIVE
archive_plugin_init_all();
#endif
pcm_convert_global_init(raw_config);
decoder_plugin_init_all(raw_config);
#ifdef ENABLE_DATABASE
const bool create_db = InitDatabaseAndStorage(raw_config);
#endif
glue_sticker_init(raw_config);
command_init();
for (auto &partition : instance->partitions) {
partition.outputs.Configure(instance->rtio_thread.GetEventLoop(),
config.replay_gain,
partition.pc);
partition.UpdateEffectiveReplayGainMode();
}
client_manager_init(raw_config);
input_stream_global_init(raw_config,
instance->io_thread.GetEventLoop());
playlist_list_global_init(raw_config);
#ifdef ENABLE_DAEMON
daemonize_commit();
#endif
#ifndef ANDROID
setup_log_output();
SignalHandlersInit(instance->event_loop);
#endif
instance->io_thread.Start();
instance->rtio_thread.Start();
#ifdef ENABLE_NEIGHBOR_PLUGINS
if (instance->neighbors != nullptr)
instance->neighbors->Open();
#endif
ZeroconfInit(raw_config, instance->event_loop);
for (auto &partition : instance->partitions)
StartPlayerThread(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
glue_state_file_init(raw_config);
#ifdef ENABLE_DATABASE
if (raw_config.GetBool(ConfigOption::AUTO_UPDATE, false)) {
#ifdef ENABLE_INOTIFY
if (instance->storage != nullptr &&
instance->update != nullptr)
mpd_inotify_init(instance->event_loop,
*instance->storage,
*instance->update,
raw_config.GetUnsigned(ConfigOption::AUTO_UPDATE_DEPTH,
INT_MAX));
#else
FormatWarning(config_domain,
"inotify: auto_update was disabled. enable during compilation phase");
#endif
}
#endif
config_global_check();
/* enable all audio outputs (if not already done by
playlist_state_restore() */
for (auto &partition : instance->partitions)
partition.pc.LockUpdateAudio();
#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);
#ifdef ENABLE_SYSTEMD_DAEMON
sd_notify(0, "READY=1");
#endif
/* run the main loop */
instance->event_loop.Run();
#ifdef _WIN32
win32_app_stopping();
#endif
/* cleanup */
instance->BeginShutdownUpdate();
if (instance->state_file != nullptr) {
instance->state_file->Write();
delete instance->state_file;
}
ZeroconfDeinit();
instance->BeginShutdownPartitions();
delete instance->client_list;
#ifdef ENABLE_NEIGHBOR_PLUGINS
if (instance->neighbors != nullptr) {
instance->neighbors->Close();
delete instance->neighbors;
}
#endif
instance->FinishShutdownUpdate();
instance->ShutdownDatabase();
#ifdef ENABLE_SQLITE
sticker_global_finish();
#endif
playlist_list_global_finish();
input_stream_global_finish();
#ifdef ENABLE_DATABASE
mapper_finish();
#endif
DeinitFS();
instance->FinishShutdownPartitions();
command_finish();
decoder_plugin_deinit_all();
#ifdef ENABLE_ARCHIVE
archive_plugin_deinit_all();
#endif
config_global_finish();
instance->rtio_thread.Stop();
instance->io_thread.Stop();
#ifndef ANDROID
SignalHandlersFinish();
#endif
delete instance;
instance = nullptr;
#ifdef ENABLE_DAEMON
daemonize_finish();
#endif
IcuFinish();
log_deinit();
#ifdef ENABLE_DBUS
/* free libdbus memory to make memory leak checkers happy */
dbus_shutdown();
#endif
return EXIT_SUCCESS;
} catch (const std::exception &e) {
LogError(e);
return EXIT_FAILURE;
}
#ifdef ANDROID
gcc_visibility_default
JNIEXPORT void JNICALL
Java_org_musicpd_Bridge_run(JNIEnv *env, jclass, jobject _context)
{
Java::Init(env);
Java::File::Initialise(env);
Environment::Initialise(env);
context = new Context(env, _context);
mpd_main(0, nullptr);
delete context;
Environment::Deinitialise(env);
}
gcc_visibility_default
JNIEXPORT void JNICALL
Java_org_musicpd_Bridge_shutdown(JNIEnv *, jclass)
{
if (instance != nullptr)
instance->Break();
}
#endif