241 lines
7.5 KiB
C++
241 lines
7.5 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* Saving and loading the playlist to/from the state file.
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*
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*/
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#include "config.h"
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#include "PlaylistState.hxx"
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#include "PlaylistError.hxx"
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#include "Playlist.hxx"
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#include "queue/QueueSave.hxx"
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#include "fs/io/TextFile.hxx"
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#include "fs/io/BufferedOutputStream.hxx"
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#include "player/Control.hxx"
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#include "config/ConfigGlobal.hxx"
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#include "config/ConfigOption.hxx"
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#include "util/CharUtil.hxx"
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#include "util/StringAPI.hxx"
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#include "util/StringCompare.hxx"
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#include "Log.hxx"
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#include <string.h>
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#include <stdlib.h>
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#define PLAYLIST_STATE_FILE_STATE "state: "
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#define PLAYLIST_STATE_FILE_RANDOM "random: "
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#define PLAYLIST_STATE_FILE_REPEAT "repeat: "
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#define PLAYLIST_STATE_FILE_SINGLE "single: "
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#define PLAYLIST_STATE_FILE_CONSUME "consume: "
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#define PLAYLIST_STATE_FILE_CURRENT "current: "
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#define PLAYLIST_STATE_FILE_TIME "time: "
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#define PLAYLIST_STATE_FILE_CROSSFADE "crossfade: "
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#define PLAYLIST_STATE_FILE_MIXRAMPDB "mixrampdb: "
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#define PLAYLIST_STATE_FILE_MIXRAMPDELAY "mixrampdelay: "
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#define PLAYLIST_STATE_FILE_PLAYLIST_BEGIN "playlist_begin"
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#define PLAYLIST_STATE_FILE_PLAYLIST_END "playlist_end"
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#define PLAYLIST_STATE_FILE_STATE_PLAY "play"
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#define PLAYLIST_STATE_FILE_STATE_PAUSE "pause"
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#define PLAYLIST_STATE_FILE_STATE_STOP "stop"
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void
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playlist_state_save(BufferedOutputStream &os, const struct playlist &playlist,
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PlayerControl &pc)
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{
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const auto player_status = pc.LockGetStatus();
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os.Write(PLAYLIST_STATE_FILE_STATE);
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if (playlist.playing) {
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switch (player_status.state) {
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case PlayerState::PAUSE:
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os.Write(PLAYLIST_STATE_FILE_STATE_PAUSE "\n");
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break;
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default:
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os.Write(PLAYLIST_STATE_FILE_STATE_PLAY "\n");
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}
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os.Format(PLAYLIST_STATE_FILE_CURRENT "%i\n",
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playlist.queue.OrderToPosition(playlist.current));
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os.Format(PLAYLIST_STATE_FILE_TIME "%f\n",
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player_status.elapsed_time.ToDoubleS());
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} else {
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os.Write(PLAYLIST_STATE_FILE_STATE_STOP "\n");
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if (playlist.current >= 0)
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os.Format(PLAYLIST_STATE_FILE_CURRENT "%i\n",
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playlist.queue.OrderToPosition(playlist.current));
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}
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os.Format(PLAYLIST_STATE_FILE_RANDOM "%i\n", playlist.queue.random);
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os.Format(PLAYLIST_STATE_FILE_REPEAT "%i\n", playlist.queue.repeat);
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os.Format(PLAYLIST_STATE_FILE_SINGLE "%i\n", playlist.queue.single);
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os.Format(PLAYLIST_STATE_FILE_CONSUME "%i\n", playlist.queue.consume);
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os.Format(PLAYLIST_STATE_FILE_CROSSFADE "%i\n",
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(int)pc.GetCrossFade());
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os.Format(PLAYLIST_STATE_FILE_MIXRAMPDB "%f\n", pc.GetMixRampDb());
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os.Format(PLAYLIST_STATE_FILE_MIXRAMPDELAY "%f\n",
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pc.GetMixRampDelay());
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os.Write(PLAYLIST_STATE_FILE_PLAYLIST_BEGIN "\n");
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queue_save(os, playlist.queue);
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os.Write(PLAYLIST_STATE_FILE_PLAYLIST_END "\n");
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}
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static void
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playlist_state_load(TextFile &file, const SongLoader &song_loader,
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struct playlist &playlist)
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{
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const char *line = file.ReadLine();
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if (line == nullptr) {
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LogWarning(playlist_domain, "No playlist in state file");
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return;
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}
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while (!StringStartsWith(line, PLAYLIST_STATE_FILE_PLAYLIST_END)) {
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queue_load_song(file, song_loader, line, playlist.queue);
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line = file.ReadLine();
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if (line == nullptr) {
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LogWarning(playlist_domain,
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"'" PLAYLIST_STATE_FILE_PLAYLIST_END
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"' not found in state file");
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break;
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}
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}
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playlist.queue.IncrementVersion();
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}
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bool
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playlist_state_restore(const char *line, TextFile &file,
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const SongLoader &song_loader,
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struct playlist &playlist, PlayerControl &pc)
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{
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int current = -1;
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SongTime seek_time = SongTime::zero();
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bool random_mode = false;
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line = StringAfterPrefix(line, PLAYLIST_STATE_FILE_STATE);
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if (line == nullptr)
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return false;
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PlayerState state;
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if (strcmp(line, PLAYLIST_STATE_FILE_STATE_PLAY) == 0)
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state = PlayerState::PLAY;
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else if (strcmp(line, PLAYLIST_STATE_FILE_STATE_PAUSE) == 0)
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state = PlayerState::PAUSE;
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else
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state = PlayerState::STOP;
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while ((line = file.ReadLine()) != nullptr) {
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const char *p;
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if ((p = StringAfterPrefix(line, PLAYLIST_STATE_FILE_TIME))) {
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seek_time = SongTime::FromS(atof(p));
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} else if ((p = StringAfterPrefix(line, PLAYLIST_STATE_FILE_REPEAT))) {
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playlist.SetRepeat(pc, StringIsEqual(p, "1"));
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} else if ((p = StringAfterPrefix(line, PLAYLIST_STATE_FILE_SINGLE))) {
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playlist.SetSingle(pc, StringIsEqual(p, "1"));
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} else if ((p = StringAfterPrefix(line, PLAYLIST_STATE_FILE_CONSUME))) {
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playlist.SetConsume(StringIsEqual(p, "1"));
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} else if ((p = StringAfterPrefix(line, PLAYLIST_STATE_FILE_CROSSFADE))) {
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pc.SetCrossFade(atoi(p));
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} else if ((p = StringAfterPrefix(line, PLAYLIST_STATE_FILE_MIXRAMPDB))) {
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pc.SetMixRampDb(atof(p));
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} else if ((p = StringAfterPrefix(line, PLAYLIST_STATE_FILE_MIXRAMPDELAY))) {
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/* this check discards "nan" which was used
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prior to MPD 0.18 */
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if (IsDigitASCII(*p))
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pc.SetMixRampDelay(atof(p));
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} else if ((p = StringAfterPrefix(line, PLAYLIST_STATE_FILE_RANDOM))) {
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random_mode = StringIsEqual(p, "1");
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} else if ((p = StringAfterPrefix(line, PLAYLIST_STATE_FILE_CURRENT))) {
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current = atoi(p);
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} else if (StringStartsWith(line,
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PLAYLIST_STATE_FILE_PLAYLIST_BEGIN)) {
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playlist_state_load(file, song_loader, playlist);
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}
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}
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playlist.SetRandom(pc, random_mode);
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if (!playlist.queue.IsEmpty()) {
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if (!playlist.queue.IsValidPosition(current))
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current = 0;
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if (state == PlayerState::PLAY &&
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config_get_bool(ConfigOption::RESTORE_PAUSED, false))
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/* the user doesn't want MPD to auto-start
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playback after startup; fall back to
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"pause" */
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state = PlayerState::PAUSE;
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/* enable all devices for the first time; this must be
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called here, after the audio output states were
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restored, before playback begins */
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if (state != PlayerState::STOP)
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pc.LockUpdateAudio();
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if (state == PlayerState::STOP /* && config_option */)
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playlist.current = current;
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else if (seek_time.count() == 0) {
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try {
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playlist.PlayPosition(pc, current);
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} catch (...) {
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/* TODO: log error? */
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}
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} else {
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try {
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playlist.SeekSongPosition(pc, current,
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seek_time);
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} catch (...) {
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/* TODO: log error? */
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}
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}
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if (state == PlayerState::PAUSE)
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pc.LockPause();
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}
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return true;
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}
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unsigned
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playlist_state_get_hash(const playlist &playlist,
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PlayerControl &pc)
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{
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const auto player_status = pc.LockGetStatus();
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return playlist.queue.version ^
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(player_status.state != PlayerState::STOP
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? (player_status.elapsed_time.ToS() << 8)
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: 0) ^
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(playlist.current >= 0
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? (playlist.queue.OrderToPosition(playlist.current) << 16)
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: 0) ^
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((int)pc.GetCrossFade() << 20) ^
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(unsigned(player_status.state) << 24) ^
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(playlist.queue.random << 27) ^
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(playlist.queue.repeat << 28) ^
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(playlist.queue.single << 29) ^
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(playlist.queue.consume << 30) ^
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(playlist.queue.random << 31);
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}
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