Clementine-audio-player-Mac.../src/covers/albumcoverloader.h

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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/>.
*/
#ifndef ALBUMCOVERLOADER_H
#define ALBUMCOVERLOADER_H
#include "albumcoverloaderoptions.h"
#include "core/song.h"
#include <QImage>
#include <QMutex>
#include <QObject>
#include <QQueue>
#include <QUrl>
class NetworkAccessManager;
class QNetworkReply;
class AlbumCoverLoader : public QObject {
Q_OBJECT
public:
AlbumCoverLoader(QObject* parent = 0);
void Stop() { stop_requested_ = true; }
static QString ImageCacheDir();
quint64 LoadImageAsync(const AlbumCoverLoaderOptions& options, const Song& song);
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virtual quint64 LoadImageAsync(
const AlbumCoverLoaderOptions& options,
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const QString& art_automatic,
const QString& art_manual,
const QString& song_filename = QString(),
const QImage& embedded_image = QImage());
void CancelTask(quint64 id);
void CancelTasks(const QSet<quint64>& ids);
static QPixmap TryLoadPixmap(const QString& automatic, const QString& manual,
const QString& filename = QString());
static QImage ScaleAndPad(const AlbumCoverLoaderOptions& options, const QImage& image);
signals:
void ImageLoaded(quint64 id, const QImage& image);
void ImageLoaded(quint64 id, const QImage& scaled, const QImage& original);
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protected slots:
void ProcessTasks();
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void RemoteFetchFinished(QNetworkReply* reply);
void SpotifyImageLoaded(const QString& url, const QImage& image);
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protected:
enum State {
State_TryingManual,
State_TryingAuto,
};
struct Task {
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Task() : redirects(0) {}
AlbumCoverLoaderOptions options;
quint64 id;
QString art_automatic;
QString art_manual;
QString song_filename;
QImage embedded_image;
State state;
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int redirects;
};
struct TryLoadResult {
TryLoadResult(bool async, bool success, const QImage& i)
: started_async(async), loaded_success(success), image(i) {}
bool started_async;
bool loaded_success;
QImage image;
};
void ProcessTask(Task* task);
void NextState(Task* task);
TryLoadResult TryLoadImage(const Task& task);
bool stop_requested_;
QMutex mutex_;
QQueue<Task> tasks_;
QMap<QNetworkReply*, Task> remote_tasks_;
QMap<QString, Task> remote_spotify_tasks_;
quint64 next_id_;
NetworkAccessManager* network_;
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bool connected_spotify_;
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static const int kMaxRedirects = 3;
};
#endif // ALBUMCOVERLOADER_H