mpd/src/Main.cxx

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/*
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* Copyright 2003-2018 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"
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#include "Main.hxx"
#include "Instance.hxx"
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#include "CommandLine.hxx"
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#include "PlaylistFile.hxx"
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#include "MusicChunk.hxx"
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#include "StateFile.hxx"
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#include "Mapper.hxx"
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#include "Permission.hxx"
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#include "Listen.hxx"
#include "client/Listener.hxx"
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#include "client/Config.hxx"
#include "client/List.hxx"
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#include "command/AllCommands.hxx"
#include "Partition.hxx"
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#include "tag/Config.hxx"
#include "ReplayGainGlobal.hxx"
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#include "Idle.hxx"
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#include "Log.hxx"
#include "LogInit.hxx"
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#include "input/Init.hxx"
#include "event/Loop.hxx"
#include "fs/AllocatedPath.hxx"
#include "fs/Config.hxx"
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#include "playlist/PlaylistRegistry.hxx"
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#include "zeroconf/ZeroconfGlue.hxx"
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#include "decoder/DecoderList.hxx"
#include "AudioParser.hxx"
#include "pcm/PcmConvert.hxx"
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#include "unix/SignalHandlers.hxx"
#include "thread/Slack.hxx"
#include "net/Init.hxx"
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#include "lib/icu/Init.hxx"
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#include "config/File.hxx"
#include "config/Check.hxx"
#include "config/Data.hxx"
#include "config/Param.hxx"
#include "config/Path.hxx"
#include "config/Defaults.hxx"
#include "config/Option.hxx"
#include "config/Domain.hxx"
#include "util/RuntimeError.hxx"
#include "util/ScopeExit.hxx"
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#ifdef ENABLE_DAEMON
#include "unix/Daemon.hxx"
#endif
#ifdef ENABLE_DATABASE
#include "db/update/Service.hxx"
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#include "db/Configured.hxx"
#include "db/DatabasePlugin.hxx"
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#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/Database.hxx"
#endif
#ifdef ENABLE_ARCHIVE
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#include "archive/ArchiveList.hxx"
#endif
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#ifdef ANDROID
#include "java/Global.hxx"
#include "java/File.hxx"
#include "android/Environment.hxx"
#include "android/Context.hxx"
#include "android/LogListener.hxx"
#include "fs/FileSystem.hxx"
#include "org_musicpd_Bridge.h"
#endif
#ifdef ENABLE_DBUS
#include "lib/dbus/Init.hxx"
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#endif
#ifdef ENABLE_SYSTEMD_DAEMON
#include <systemd/sd-daemon.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);
#ifdef ANDROID
Context *context;
LogListener *logListener;
#endif
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Instance *global_instance;
struct Config {
ReplayGainConfig replay_gain;
};
static Config
LoadConfig(const ConfigData &config)
{
return {LoadReplayGainConfig(config)};
}
#ifdef ENABLE_DAEMON
static void
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glue_daemonize_init(const struct options *options,
const ConfigData &config)
{
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daemonize_init(config.GetString(ConfigOption::USER),
config.GetString(ConfigOption::GROUP),
config.GetPath(ConfigOption::PID_FILE));
if (options->kill)
daemonize_kill();
}
#endif
static void
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glue_mapper_init(const ConfigData &config)
{
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mapper_init(config.GetPath(ConfigOption::PLAYLIST_DIR));
}
#ifdef ENABLE_DATABASE
static void
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InitStorage(Instance &instance, EventLoop &event_loop,
const ConfigData &config)
{
auto storage = CreateConfiguredStorage(config, event_loop);
if (storage == nullptr)
return;
CompositeStorage *composite = new CompositeStorage();
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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
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glue_db_init_and_load(Instance &instance, const ConfigData &config)
{
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auto db = CreateConfiguredDatabase(config, instance.event_loop,
instance.io_thread.GetEventLoop(),
instance);
if (!db)
return true;
if (db->GetPlugin().RequireStorage()) {
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InitStorage(instance, instance.io_thread.GetEventLoop(),
config);
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if (instance.storage == 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");
}
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try {
db->Open();
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} catch (...) {
std::throw_with_nested(std::runtime_error("Failed to open database plugin"));
}
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instance.database = std::move(db);
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auto *sdb = dynamic_cast<SimpleDatabase *>(instance.database.get());
if (sdb == nullptr)
return true;
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instance.update = new UpdateService(config,
instance.event_loop, *sdb,
static_cast<CompositeStorage &>(*instance.storage),
instance);
/* run database update after daemonization? */
return sdb->FileExists();
}
static bool
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InitDatabaseAndStorage(Instance &instance, const ConfigData &config)
{
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const bool create_db = !glue_db_init_and_load(instance, config);
return create_db;
}
#endif
#ifdef ENABLE_SQLITE
/**
* Configure and initialize the sticker subsystem.
*/
static std::unique_ptr<StickerDatabase>
LoadStickerDatabase(const ConfigData &config)
{
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auto sticker_file = config.GetPath(ConfigOption::STICKER_FILE);
if (sticker_file.IsNull())
return nullptr;
return std::make_unique<StickerDatabase>(std::move(sticker_file));
}
#endif
static void
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glue_state_file_init(Instance &instance, const ConfigData &raw_config)
{
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StateFileConfig config(raw_config);
if (!config.IsEnabled())
return;
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instance.state_file = new StateFile(std::move(config),
instance.partitions.front(),
instance.event_loop);
instance.state_file->Read();
}
/**
* Initialize the decoder and player core, including the music pipe.
*/
static void
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initialize_decoder_and_player(Instance &instance,
const ConfigData &config,
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const ReplayGainConfig &replay_gain_config)
{
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const ConfigParam *param;
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size_t buffer_size;
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param = config.GetParam(ConfigOption::AUDIO_BUFFER_SIZE);
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if (param != nullptr) {
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char *test;
long tmp = strtol(param->value.c_str(), &test, 10);
if (*test != '\0' || tmp <= 0 || tmp == LONG_MAX)
throw FormatRuntimeError("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;
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const unsigned buffered_chunks = buffer_size / CHUNK_SIZE;
if (buffered_chunks >= 1 << 15)
throw FormatRuntimeError("buffer size \"%lu\" is too big",
(unsigned long)buffer_size);
const unsigned max_length =
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config.GetPositive(ConfigOption::MAX_PLAYLIST_LENGTH,
DEFAULT_PLAYLIST_MAX_LENGTH);
AudioFormat configured_audio_format = AudioFormat::Undefined();
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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));
}
}
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instance.partitions.emplace_back(instance,
"default",
max_length,
buffered_chunks,
configured_audio_format,
replay_gain_config);
auto &partition = instance.partitions.back();
try {
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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::BeginShutdownPartitions() noexcept
{
for (auto &partition : partitions) {
partition.pc.Kill();
partition.listener.reset();
}
}
void
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Instance::OnIdle(unsigned flags) noexcept
{
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/* 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
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int
main(int argc, char *argv[]) noexcept
{
#ifdef _WIN32
return win32_main(argc, argv);
#else
return mpd_main(argc, argv);
#endif
}
#endif
static void
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mpd_main_after_fork(Instance &instance,
const ConfigData &raw_config,
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const Config &config);
static inline void
MainConfigured(const struct options &options, const ConfigData &raw_config)
{
#ifdef ENABLE_DAEMON
daemonize_close_stdin();
#endif
#ifndef ANDROID
#ifdef HAVE_LOCALE_H
/* initialize locale */
setlocale(LC_CTYPE,"");
setlocale(LC_COLLATE, "");
#endif
#endif
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const ScopeIcuInit icu_init;
const ScopeNetInit net_init;
#ifdef ENABLE_DBUS
const ODBus::ScopeInit dbus_init;
#endif
InitPathParser(raw_config);
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const auto config = LoadConfig(raw_config);
#ifdef ENABLE_DAEMON
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glue_daemonize_init(&options, raw_config);
#endif
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TagLoadConfig(raw_config);
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log_init(raw_config, options.verbose, options.log_stderr);
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Instance instance;
global_instance = &instance;
#ifdef ENABLE_NEIGHBOR_PLUGINS
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instance.neighbors = std::make_unique<NeighborGlue>();
instance.neighbors->Init(raw_config,
instance.io_thread.GetEventLoop(),
instance);
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if (instance.neighbors->IsEmpty())
instance.neighbors.reset();
#endif
const unsigned max_clients =
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raw_config.GetPositive(ConfigOption::MAX_CONN, 10);
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instance.client_list = new ClientList(max_clients);
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initialize_decoder_and_player(instance,
raw_config, config.replay_gain);
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listen_global_init(raw_config, *instance.partitions.front().listener);
#ifdef ENABLE_DAEMON
daemonize_set_user();
daemonize_begin(options.daemon);
AtScopeExit() { daemonize_finish(); };
#endif
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mpd_main_after_fork(instance, raw_config, config);
}
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#ifndef ANDROID
static inline void
MainOrThrow(int argc, char *argv[])
{
struct options options;
ConfigData raw_config;
ParseCommandLine(argc, argv, options, raw_config);
MainConfigured(options, raw_config);
}
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int mpd_main(int argc, char *argv[]) noexcept
{
AtScopeExit() { log_deinit(); };
try {
MainOrThrow(argc, argv);
return EXIT_SUCCESS;
} catch (...) {
LogError(std::current_exception());
return EXIT_FAILURE;
}
}
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#endif /* !ANDROID */
static void
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mpd_main_after_fork(Instance &instance,
const ConfigData &raw_config, const Config &config)
{
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ConfigureFS(raw_config);
AtScopeExit() { DeinitFS(); };
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glue_mapper_init(raw_config);
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initPermissions(raw_config);
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spl_global_init(raw_config);
#ifdef ENABLE_ARCHIVE
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const ScopeArchivePluginsInit archive_plugins_init;
#endif
pcm_convert_global_init(raw_config);
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const ScopeDecoderPluginsInit decoder_plugins_init(raw_config);
#ifdef ENABLE_DATABASE
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const bool create_db = InitDatabaseAndStorage(instance, raw_config);
#endif
#ifdef ENABLE_SQLITE
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instance.sticker_database = LoadStickerDatabase(raw_config);
#endif
command_init();
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for (auto &partition : instance.partitions) {
partition.outputs.Configure(instance.rtio_thread.GetEventLoop(),
raw_config,
config.replay_gain,
partition.pc);
partition.UpdateEffectiveReplayGainMode();
}
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client_manager_init(raw_config);
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const ScopeInputPluginsInit input_plugins_init(raw_config,
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instance.io_thread.GetEventLoop());
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const ScopePlaylistPluginsInit playlist_plugins_init(raw_config);
#ifdef ENABLE_DAEMON
daemonize_commit();
#endif
#ifndef ANDROID
setup_log_output();
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const ScopeSignalHandlersInit signal_handlers_init(instance.event_loop);
#endif
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instance.io_thread.Start();
instance.rtio_thread.Start();
#ifdef ENABLE_NEIGHBOR_PLUGINS
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if (instance.neighbors != nullptr)
instance.neighbors->Open();
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AtScopeExit(&instance) {
if (instance.neighbors != nullptr)
instance.neighbors->Close();
};
#endif
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ZeroconfInit(raw_config, instance.event_loop);
#ifdef ENABLE_DATABASE
if (create_db) {
/* the database failed to load: recreate the
database */
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instance.update->Enqueue("", true);
}
#endif
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glue_state_file_init(instance, raw_config);
#ifdef ENABLE_DATABASE
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if (raw_config.GetBool(ConfigOption::AUTO_UPDATE, false)) {
#ifdef ENABLE_INOTIFY
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if (instance.storage != nullptr &&
instance.update != nullptr)
mpd_inotify_init(instance.event_loop,
*instance.storage,
*instance.update,
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raw_config.GetUnsigned(ConfigOption::AUTO_UPDATE_DEPTH,
INT_MAX));
#else
FormatWarning(config_domain,
"inotify: auto_update was disabled. enable during compilation phase");
#endif
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}
#endif
Check(raw_config);
/* enable all audio outputs (if not already done by
playlist_state_restore() */
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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 */
SetThreadTimerSlack(std::chrono::milliseconds(100));
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#ifdef ENABLE_SYSTEMD_DAEMON
sd_notify(0, "READY=1");
#endif
/* run the main loop */
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instance.event_loop.Run();
#ifdef _WIN32
win32_app_stopping();
#endif
/* cleanup */
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instance.BeginShutdownUpdate();
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if (instance.state_file != nullptr) {
instance.state_file->Write();
delete instance.state_file;
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}
ZeroconfDeinit();
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instance.BeginShutdownPartitions();
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delete instance.client_list;
}
#ifdef ANDROID
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static void
AndroidMain()
{
struct options options;
ConfigData raw_config;
const auto sdcard = Environment::getExternalStorageDirectory();
if (!sdcard.IsNull()) {
const auto config_path =
sdcard / Path::FromFS("mpd.conf");
if (FileExists(config_path))
ReadConfigFile(raw_config, config_path);
}
MainConfigured(options, raw_config);
}
gcc_visibility_default
JNIEXPORT void JNICALL
Java_org_musicpd_Bridge_run(JNIEnv *env, jclass, jobject _context, jobject _logListener)
{
Java::Init(env);
Java::Object::Initialise(env);
Java::File::Initialise(env);
Environment::Initialise(env);
AtScopeExit(env) { Environment::Deinitialise(env); };
context = new Context(env, _context);
AtScopeExit() { delete context; };
if (_logListener != nullptr)
logListener = new LogListener(env, _logListener);
AtScopeExit() { delete logListener; };
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try {
AndroidMain();
} catch (...) {
LogError(std::current_exception());
}
}
gcc_visibility_default
JNIEXPORT void JNICALL
Java_org_musicpd_Bridge_shutdown(JNIEnv *, jclass)
{
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if (global_instance != nullptr)
global_instance->Break();
}
#endif