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/*
* 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.
*/
/*
* Saving and loading the playlist to/from the state file.
*
*/
#include "config.h"
#include "PlaylistState.hxx"
#include "PlaylistError.hxx"
#include "Playlist.hxx"
#include "QueueSave.hxx"
#include "TextFile.hxx"
#include "PlayerControl.hxx"
#include "ConfigGlobal.hxx"
#include "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, 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, 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,
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, 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);
}
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