Clementine-audio-player-Mac.../src/playlistparsers/m3uparser.cpp

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/* This file is part of Clementine.
Copyright 2010, David Sansome <me@davidsansome.com>
Clementine 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 3 of the License, or
(at your option) any later version.
Clementine 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 Clementine. If not, see <http://www.gnu.org/licenses/>.
*/
#include "m3uparser.h"
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#include <QBuffer>
#include <QRegExp>
#include <QTextCodec>
#include <QtDebug>
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#include "core/logging.h"
#include "core/timeconstants.h"
#include "playlist/playlist.h"
M3UParser::M3UParser(LibraryBackendInterface* library, QObject* parent)
: ParserBase(library, parent) {}
SongList M3UParser::Load(QIODevice* device, const QString& playlist_path,
const QDir& dir) const {
SongList ret;
M3UType type = STANDARD;
Metadata current_metadata;
// Unicode auto-detection is enabled in QTextStream by default.
QTextStream playlist_stream(device);
QString data = playlist_stream.readAll();
qLog(Debug) << "Detected codec" << playlist_stream.codec()->name();
// iTune playlists use \r newlines. These aren't handled by the Qt readLine
// methods.
QStringList lines = data.split(QRegExp("\n|\r|\r\n"));
for (int i = 0; i < lines.count(); i++) {
QString line = lines[i].trimmed();
if (i == 0 && line.startsWith("#EXTM3U")) {
// This is in extended M3U format.
type = EXTENDED;
} else if (line.startsWith('#')) {
// Extended info or comment.
if (type == EXTENDED && line.startsWith("#EXT")) {
if (!ParseMetadata(line, &current_metadata)) {
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qLog(Warning) << "Failed to parse metadata: " << line;
}
}
} else if (!line.isEmpty()) {
Song song = LoadSong(line, 0, dir);
if (!current_metadata.title.isEmpty()) {
song.set_title(current_metadata.title);
}
if (!current_metadata.artist.isEmpty()) {
song.set_artist(current_metadata.artist);
}
if (current_metadata.length > 0) {
song.set_length_nanosec(current_metadata.length);
}
ret << song;
current_metadata = Metadata();
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}
}
return ret;
}
bool M3UParser::ParseMetadata(const QString& line,
M3UParser::Metadata* metadata) const {
// Extended info, eg.
// #EXTINF:123,Sample Artist - Sample title
QString info = line.section(':', 1);
QString l = info.section(',', 0, 0);
bool ok = false;
int length = l.toInt(&ok);
if (!ok) {
return false;
}
metadata->length = length * kNsecPerSec;
QString track_info = info.section(',', 1);
QStringList list = track_info.split(" - ");
if (list.size() <= 1) {
metadata->title = track_info;
return true;
}
metadata->artist = list[0].trimmed();
metadata->title = list[1].trimmed();
return true;
}
void M3UParser::Save(const SongList& songs, QIODevice* device, const QDir& dir,
Playlist::Path path_type) const {
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device->write("#EXTM3U\n");
QSettings s;
s.beginGroup(Playlist::kSettingsGroup);
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bool writeMetadata = s.value(Playlist::kWriteMetadata, true).toBool();
s.endGroup();
for (const Song& song : songs) {
if (song.url().isEmpty()) {
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continue;
}
if (writeMetadata) {
QString meta = QString("#EXTINF:%1,%2 - %3\n")
.arg(song.length_nanosec() / kNsecPerSec)
.arg(song.artist())
.arg(song.title());
device->write(meta.toUtf8());
}
device->write(URLOrFilename(song.url(), dir, path_type).toUtf8());
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device->write("\n");
}
}
bool M3UParser::TryMagic(const QByteArray& data) const {
return data.contains("#EXTM3U") || data.contains("#EXTINF");
}