/* * 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. */ /* * Saving and loading the playlist to/from the state file. * */ #include "config.h" #include "PlaylistState.hxx" #include "PlaylistError.hxx" #include "Playlist.hxx" #include "queue/QueueSave.hxx" #include "fs/TextFile.hxx" #include "PlayerControl.hxx" #include "config/ConfigGlobal.hxx" #include "config/ConfigOption.hxx" #include "fs/Limits.hxx" #include "util/CharUtil.hxx" #include "util/StringUtil.hxx" #include "Log.hxx" #include <string.h> #include <stdlib.h> #define PLAYLIST_STATE_FILE_STATE "state: " #define PLAYLIST_STATE_FILE_RANDOM "random: " #define PLAYLIST_STATE_FILE_REPEAT "repeat: " #define PLAYLIST_STATE_FILE_SINGLE "single: " #define PLAYLIST_STATE_FILE_CONSUME "consume: " #define PLAYLIST_STATE_FILE_CURRENT "current: " #define PLAYLIST_STATE_FILE_TIME "time: " #define PLAYLIST_STATE_FILE_CROSSFADE "crossfade: " #define PLAYLIST_STATE_FILE_MIXRAMPDB "mixrampdb: " #define PLAYLIST_STATE_FILE_MIXRAMPDELAY "mixrampdelay: " #define PLAYLIST_STATE_FILE_PLAYLIST_BEGIN "playlist_begin" #define PLAYLIST_STATE_FILE_PLAYLIST_END "playlist_end" #define PLAYLIST_STATE_FILE_STATE_PLAY "play" #define PLAYLIST_STATE_FILE_STATE_PAUSE "pause" #define PLAYLIST_STATE_FILE_STATE_STOP "stop" #define PLAYLIST_BUFFER_SIZE 2*MPD_PATH_MAX void playlist_state_save(FILE *fp, const struct playlist &playlist, PlayerControl &pc) { const auto player_status = pc.GetStatus(); fputs(PLAYLIST_STATE_FILE_STATE, fp); if (playlist.playing) { switch (player_status.state) { case PlayerState::PAUSE: fputs(PLAYLIST_STATE_FILE_STATE_PAUSE "\n", fp); break; default: fputs(PLAYLIST_STATE_FILE_STATE_PLAY "\n", fp); } fprintf(fp, PLAYLIST_STATE_FILE_CURRENT "%i\n", playlist.queue.OrderToPosition(playlist.current)); fprintf(fp, PLAYLIST_STATE_FILE_TIME "%i\n", (int)player_status.elapsed_time); } else { fputs(PLAYLIST_STATE_FILE_STATE_STOP "\n", fp); if (playlist.current >= 0) fprintf(fp, PLAYLIST_STATE_FILE_CURRENT "%i\n", playlist.queue.OrderToPosition(playlist.current)); } fprintf(fp, PLAYLIST_STATE_FILE_RANDOM "%i\n", playlist.queue.random); fprintf(fp, PLAYLIST_STATE_FILE_REPEAT "%i\n", playlist.queue.repeat); fprintf(fp, PLAYLIST_STATE_FILE_SINGLE "%i\n", playlist.queue.single); fprintf(fp, PLAYLIST_STATE_FILE_CONSUME "%i\n", playlist.queue.consume); fprintf(fp, PLAYLIST_STATE_FILE_CROSSFADE "%i\n", (int)pc.GetCrossFade()); fprintf(fp, PLAYLIST_STATE_FILE_MIXRAMPDB "%f\n", pc.GetMixRampDb()); fprintf(fp, PLAYLIST_STATE_FILE_MIXRAMPDELAY "%f\n", pc.GetMixRampDelay()); fputs(PLAYLIST_STATE_FILE_PLAYLIST_BEGIN "\n", fp); queue_save(fp, playlist.queue); fputs(PLAYLIST_STATE_FILE_PLAYLIST_END "\n", fp); } static void playlist_state_load(TextFile &file, const SongLoader &song_loader, struct playlist &playlist) { const char *line = file.ReadLine(); if (line == nullptr) { LogWarning(playlist_domain, "No playlist in state file"); return; } while (!StringStartsWith(line, PLAYLIST_STATE_FILE_PLAYLIST_END)) { queue_load_song(file, song_loader, line, playlist.queue); line = file.ReadLine(); if (line == nullptr) { LogWarning(playlist_domain, "'" PLAYLIST_STATE_FILE_PLAYLIST_END "' not found in state file"); break; } } playlist.queue.IncrementVersion(); } bool playlist_state_restore(const char *line, TextFile &file, const SongLoader &song_loader, struct playlist &playlist, PlayerControl &pc) { int current = -1; int seek_time = 0; bool random_mode = false; if (!StringStartsWith(line, PLAYLIST_STATE_FILE_STATE)) return false; line += sizeof(PLAYLIST_STATE_FILE_STATE) - 1; PlayerState state; if (strcmp(line, PLAYLIST_STATE_FILE_STATE_PLAY) == 0) state = PlayerState::PLAY; else if (strcmp(line, PLAYLIST_STATE_FILE_STATE_PAUSE) == 0) state = PlayerState::PAUSE; else state = PlayerState::STOP; while ((line = file.ReadLine()) != nullptr) { if (StringStartsWith(line, PLAYLIST_STATE_FILE_TIME)) { seek_time = atoi(&(line[strlen(PLAYLIST_STATE_FILE_TIME)])); } else if (StringStartsWith(line, PLAYLIST_STATE_FILE_REPEAT)) { playlist.SetRepeat(pc, strcmp(&(line[strlen(PLAYLIST_STATE_FILE_REPEAT)]), "1") == 0); } else if (StringStartsWith(line, PLAYLIST_STATE_FILE_SINGLE)) { playlist.SetSingle(pc, strcmp(&(line[strlen(PLAYLIST_STATE_FILE_SINGLE)]), "1") == 0); } else if (StringStartsWith(line, PLAYLIST_STATE_FILE_CONSUME)) { playlist.SetConsume(strcmp(&(line[strlen(PLAYLIST_STATE_FILE_CONSUME)]), "1") == 0); } else if (StringStartsWith(line, PLAYLIST_STATE_FILE_CROSSFADE)) { pc.SetCrossFade(atoi(line + strlen(PLAYLIST_STATE_FILE_CROSSFADE))); } else if (StringStartsWith(line, PLAYLIST_STATE_FILE_MIXRAMPDB)) { pc.SetMixRampDb(atof(line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDB))); } else if (StringStartsWith(line, PLAYLIST_STATE_FILE_MIXRAMPDELAY)) { const char *p = line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDELAY); /* this check discards "nan" which was used prior to MPD 0.18 */ if (IsDigitASCII(*p)) pc.SetMixRampDelay(atof(p)); } else if (StringStartsWith(line, PLAYLIST_STATE_FILE_RANDOM)) { random_mode = strcmp(line + strlen(PLAYLIST_STATE_FILE_RANDOM), "1") == 0; } else if (StringStartsWith(line, PLAYLIST_STATE_FILE_CURRENT)) { current = atoi(&(line [strlen (PLAYLIST_STATE_FILE_CURRENT)])); } else if (StringStartsWith(line, PLAYLIST_STATE_FILE_PLAYLIST_BEGIN)) { playlist_state_load(file, song_loader, playlist); } } playlist.SetRandom(pc, random_mode); if (!playlist.queue.IsEmpty()) { if (!playlist.queue.IsValidPosition(current)) current = 0; if (state == PlayerState::PLAY && config_get_bool(CONF_RESTORE_PAUSED, false)) /* the user doesn't want MPD to auto-start playback after startup; fall back to "pause" */ state = PlayerState::PAUSE; /* enable all devices for the first time; this must be called here, after the audio output states were restored, before playback begins */ if (state != PlayerState::STOP) pc.UpdateAudio(); if (state == PlayerState::STOP /* && config_option */) playlist.current = current; else if (seek_time == 0) playlist.PlayPosition(pc, current); else playlist.SeekSongPosition(pc, current, seek_time); if (state == PlayerState::PAUSE) pc.Pause(); } return true; } unsigned playlist_state_get_hash(const playlist &playlist, PlayerControl &pc) { const auto player_status = pc.GetStatus(); return playlist.queue.version ^ (player_status.state != PlayerState::STOP ? ((int)player_status.elapsed_time << 8) : 0) ^ (playlist.current >= 0 ? (playlist.queue.OrderToPosition(playlist.current) << 16) : 0) ^ ((int)pc.GetCrossFade() << 20) ^ (unsigned(player_status.state) << 24) ^ (playlist.queue.random << 27) ^ (playlist.queue.repeat << 28) ^ (playlist.queue.single << 29) ^ (playlist.queue.consume << 30) ^ (playlist.queue.random << 31); }