mpd/src/Main.cxx
2013-01-30 22:25:17 +01:00

588 lines
12 KiB
C++

/*
* Copyright (C) 2003-2013 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 "CommandLine.hxx"
#include "PlaylistFile.hxx"
#include "PlaylistGlobal.hxx"
#include "UpdateGlue.hxx"
#include "MusicChunk.hxx"
#include "StateFile.hxx"
#include "PlayerThread.hxx"
#include "Mapper.hxx"
#include "DatabaseGlue.hxx"
#include "DatabaseSimple.hxx"
#include "Permission.hxx"
#include "Listen.hxx"
#include "Client.hxx"
#include "ClientList.hxx"
#include "AllCommands.hxx"
#include "Partition.hxx"
#include "Volume.hxx"
#include "OutputAll.hxx"
#include "tag.h"
#include "conf.h"
#include "replay_gain_config.h"
#include "Idle.hxx"
#include "SignalHandlers.hxx"
#include "Log.hxx"
#include "GlobalEvents.hxx"
#include "InputInit.hxx"
#include "event/Loop.hxx"
#include "IOThread.hxx"
#include "fs/Path.hxx"
#include "PlaylistRegistry.hxx"
#include "ZeroconfGlue.hxx"
#include "DecoderList.hxx"
#include "AudioConfig.hxx"
extern "C" {
#include "daemon.h"
#include "stats.h"
#include "pcm_resample.h"
}
#include "mpd_error.h"
#ifdef ENABLE_INOTIFY
#include "InotifyUpdate.hxx"
#endif
#ifdef ENABLE_SQLITE
#include "StickerDatabase.hxx"
#endif
#ifdef ENABLE_ARCHIVE
#include "ArchiveList.hxx"
#endif
#include <glib.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#ifdef WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
enum {
DEFAULT_BUFFER_SIZE = 2048,
DEFAULT_BUFFER_BEFORE_PLAY = 10,
};
GThread *main_task;
EventLoop *main_loop;
ClientList *client_list;
Partition *global_partition;
static StateFile *state_file;
static inline GQuark main_quark()
{
return g_quark_from_static_string ("main");
}
static bool
glue_daemonize_init(const struct options *options, GError **error_r)
{
GError *error = NULL;
char *pid_file = config_dup_path(CONF_PID_FILE, &error);
if (pid_file == NULL && error != NULL) {
g_propagate_error(error_r, error);
return false;
}
daemonize_init(config_get_string(CONF_USER, NULL),
config_get_string(CONF_GROUP, NULL),
pid_file);
g_free(pid_file);
if (options->kill)
daemonize_kill();
return true;
}
static bool
glue_mapper_init(GError **error_r)
{
GError *error = NULL;
char *music_dir = config_dup_path(CONF_MUSIC_DIR, &error);
if (music_dir == NULL && error != NULL) {
g_propagate_error(error_r, error);
return false;
}
char *playlist_dir = config_dup_path(CONF_PLAYLIST_DIR, &error);
if (playlist_dir == NULL && error != NULL) {
g_propagate_error(error_r, error);
return false;
}
if (music_dir == NULL)
music_dir = g_strdup(g_get_user_special_dir(G_USER_DIRECTORY_MUSIC));
if (!mapper_init(music_dir, playlist_dir, &error)) {
g_propagate_error(error_r, error);
return false;
}
g_free(music_dir);
g_free(playlist_dir);
return true;
}
/**
* 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 != NULL && path != NULL)
g_message("Found both 'database' and 'db_file' setting - ignoring the latter");
GError *error = NULL;
bool ret;
if (!mapper_has_music_directory()) {
if (param != NULL)
g_message("Found database setting without "
"music_directory - disabling database");
if (path != NULL)
g_message("Found db_file setting without "
"music_directory - disabling database");
return true;
}
struct config_param *allocated = NULL;
if (param == NULL && path != NULL) {
allocated = new config_param("database", path->line);
allocated->AddBlockParam("path", path->value, path->line);
param = allocated;
}
if (!DatabaseGlobalInit(param, &error))
MPD_ERROR("%s", error->message);
delete allocated;
ret = DatabaseGlobalOpen(&error);
if (!ret)
MPD_ERROR("%s", error->message);
/* run database update after daemonization? */
return !db_is_simple() || db_exists();
}
/**
* Configure and initialize the sticker subsystem.
*/
static void
glue_sticker_init(void)
{
#ifdef ENABLE_SQLITE
GError *error = NULL;
char *sticker_file = config_dup_path(CONF_STICKER_FILE, &error);
if (sticker_file == NULL && error != NULL)
MPD_ERROR("%s", error->message);
if (!sticker_global_init(sticker_file, &error))
MPD_ERROR("%s", error->message);
g_free(sticker_file);
#endif
}
static bool
glue_state_file_init(GError **error_r)
{
GError *error = NULL;
char *path = config_dup_path(CONF_STATE_FILE, &error);
if (path == nullptr) {
if (error != nullptr) {
g_propagate_error(error_r, error);
return false;
}
return true;
}
Path path_fs = Path::FromUTF8(path);
g_free(path);
if (path_fs.IsNull()) {
g_set_error(error_r, main_quark(), 0,
"Failed to convert state file path to FS encoding");
return false;
}
state_file = new StateFile(std::move(path_fs),
*global_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;
retval = WSAStartup(MAKEWORD(2, 2), &sockinfo);
if(retval != 0)
{
MPD_ERROR("Attempt to open Winsock2 failed; error code %d\n",
retval);
}
if (LOBYTE(sockinfo.wVersion) != 2)
{
MPD_ERROR("We use Winsock2 but your version is either too new "
"or old; please install Winsock 2.x\n");
}
#endif
}
/**
* Initialize the decoder and player core, including the music pipe.
*/
static void
initialize_decoder_and_player(void)
{
const struct config_param *param;
char *test;
size_t buffer_size;
float perc;
unsigned buffered_chunks;
unsigned buffered_before_play;
param = config_get_param(CONF_AUDIO_BUFFER_SIZE);
if (param != NULL) {
long tmp = strtol(param->value, &test, 10);
if (*test != '\0' || tmp <= 0 || tmp == LONG_MAX)
MPD_ERROR("buffer size \"%s\" is not a positive integer, "
"line %i\n", param->value, param->line);
buffer_size = tmp;
} else
buffer_size = DEFAULT_BUFFER_SIZE;
buffer_size *= 1024;
buffered_chunks = buffer_size / CHUNK_SIZE;
if (buffered_chunks >= 1 << 15)
MPD_ERROR("buffer size \"%li\" is too big\n", (long)buffer_size);
param = config_get_param(CONF_BUFFER_BEFORE_PLAY);
if (param != NULL) {
perc = strtod(param->value, &test);
if (*test != '%' || perc < 0 || perc > 100) {
MPD_ERROR("buffered before play \"%s\" is not a positive "
"percentage and less than 100 percent, line %i",
param->value, param->line);
}
} else
perc = DEFAULT_BUFFER_BEFORE_PLAY;
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);
global_partition = new Partition(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)
client_list->IdleAdd(flags);
}
/**
* Handler for GlobalEvents::SHUTDOWN.
*/
static void
shutdown_event_emitted(void)
{
main_loop->Break();
}
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;
clock_t start;
bool create_db;
GError *error = NULL;
bool success;
daemonize_close_stdin();
#ifdef HAVE_LOCALE_H
/* initialize locale */
setlocale(LC_CTYPE,"");
#endif
g_set_application_name("Music Player Daemon");
/* enable GLib's thread safety code */
g_thread_init(NULL);
io_thread_init();
winsock_init();
config_global_init();
success = parse_cmdline(argc, argv, &options, &error);
if (!success) {
g_warning("%s", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
if (!glue_daemonize_init(&options, &error)) {
g_warning("%s", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
stats_global_init();
tag_lib_init();
if (!log_init(options.verbose, options.log_stderr, &error)) {
g_warning("%s", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
main_task = g_thread_self();
main_loop = new EventLoop(EventLoop::Default());
const unsigned max_clients = config_get_positive(CONF_MAX_CONN, 10);
client_list = new ClientList(max_clients);
success = listen_global_init(&error);
if (!success) {
g_warning("%s", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
daemonize_set_user();
GlobalEvents::Initialize();
GlobalEvents::Register(GlobalEvents::IDLE, idle_event_emitted);
GlobalEvents::Register(GlobalEvents::SHUTDOWN, shutdown_event_emitted);
Path::GlobalInit();
if (!glue_mapper_init(&error)) {
g_warning("%s", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
initPermissions();
playlist_global_init();
spl_global_init();
#ifdef ENABLE_ARCHIVE
archive_plugin_init_all();
#endif
if (!pcm_resample_global_init(&error)) {
g_warning("%s", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
decoder_plugin_init_all();
update_global_init();
create_db = !glue_db_init_and_load();
glue_sticker_init();
command_init();
initialize_decoder_and_player();
volume_init();
initAudioConfig();
audio_output_all_init(&global_partition->pc);
client_manager_init();
replay_gain_global_init();
if (!input_stream_global_init(&error)) {
g_warning("%s", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
playlist_list_global_init();
daemonize(options.daemon);
setup_log_output(options.log_stderr);
initSigHandlers();
if (!io_thread_start(&error)) {
g_warning("%s", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
ZeroconfInit(*main_loop);
player_create(&global_partition->pc);
if (create_db) {
/* the database failed to load: recreate the
database */
unsigned job = update_enqueue(NULL, true);
if (job == 0)
MPD_ERROR("directory update failed");
}
if (!glue_state_file_init(&error)) {
g_warning("%s", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
audio_output_all_set_replay_gain_mode(replay_gain_get_real_mode(global_partition->playlist.queue.random));
success = config_get_bool(CONF_AUTO_UPDATE, false);
#ifdef ENABLE_INOTIFY
if (success && mapper_has_music_directory())
mpd_inotify_init(config_get_unsigned(CONF_AUTO_UPDATE_DEPTH,
G_MAXUINT));
#else
if (success)
g_warning("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() */
global_partition->pc.UpdateAudio();
#ifdef WIN32
win32_app_started();
#endif
/* 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;
}
global_partition->pc.Kill();
ZeroconfDeinit();
listen_global_finish();
delete client_list;
start = clock();
DatabaseGlobalDeinit();
g_debug("db_finish took %f seconds",
((float)(clock()-start))/CLOCKS_PER_SEC);
#ifdef ENABLE_SQLITE
sticker_global_finish();
#endif
GlobalEvents::Deinitialize();
playlist_list_global_finish();
input_stream_global_finish();
audio_output_all_finish();
volume_finish();
mapper_finish();
delete global_partition;
command_finish();
update_global_finish();
decoder_plugin_deinit_all();
#ifdef ENABLE_ARCHIVE
archive_plugin_deinit_all();
#endif
config_global_finish();
stats_global_finish();
io_thread_deinit();
delete main_loop;
daemonize_finish();
#ifdef WIN32
WSACleanup();
#endif
log_deinit();
return EXIT_SUCCESS;
}