125 lines
3.7 KiB
C++
125 lines
3.7 KiB
C++
/*
|
|
* Strawberry Music Player
|
|
* This file was part of Clementine.
|
|
* Copyright 2010, David Sansome <me@davidsansome.com>
|
|
*
|
|
* Strawberry 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.
|
|
*
|
|
* Strawberry 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 Strawberry. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef ALBUMCOVERFETCHER_H
|
|
#define ALBUMCOVERFETCHER_H
|
|
|
|
#include "config.h"
|
|
|
|
#include <QtGlobal>
|
|
#include <QObject>
|
|
#include <QMetaType>
|
|
#include <QSet>
|
|
#include <QList>
|
|
#include <QHash>
|
|
#include <QQueue>
|
|
#include <QString>
|
|
#include <QUrl>
|
|
#include <QImage>
|
|
|
|
class QTimer;
|
|
class QNetworkAccessManager;
|
|
class CoverProviders;
|
|
class AlbumCoverFetcherSearch;
|
|
struct CoverSearchStatistics;
|
|
|
|
// This class represents a single search-for-cover request. It identifies and describes the request.
|
|
struct CoverSearchRequest {
|
|
explicit CoverSearchRequest() : id(-1), search(false), fetchall(false) {}
|
|
|
|
// An unique (for one AlbumCoverFetcher) request identifier
|
|
quint64 id;
|
|
|
|
// A search query
|
|
QString artist;
|
|
QString album;
|
|
QString title;
|
|
|
|
// Is this only a search request or should we also fetch the first cover that's found?
|
|
bool search;
|
|
|
|
// Is the request part of fetchall (fetching all missing covers)
|
|
bool fetchall;
|
|
};
|
|
|
|
// This structure represents a single result of some album's cover search request.
|
|
struct CoverSearchResult {
|
|
explicit CoverSearchResult() : score(0.0) {}
|
|
|
|
// Used for grouping in the user interface.
|
|
QString provider;
|
|
|
|
// Artist and album returned by the provider
|
|
QString artist;
|
|
QString album;
|
|
|
|
// An URL of a cover image
|
|
QUrl image_url;
|
|
|
|
// Total score for this result
|
|
float score;
|
|
|
|
};
|
|
Q_DECLARE_METATYPE(CoverSearchResult)
|
|
|
|
// This is a complete result of a single search request (a list of results, each describing one image, actually).
|
|
typedef QList<CoverSearchResult> CoverSearchResults;
|
|
Q_DECLARE_METATYPE(QList<CoverSearchResult>)
|
|
|
|
// This class searches for album covers for a given query or artist/album and returns URLs. It's NOT thread-safe.
|
|
class AlbumCoverFetcher : public QObject {
|
|
Q_OBJECT
|
|
|
|
public:
|
|
explicit AlbumCoverFetcher(CoverProviders *cover_providers, QObject *parent = nullptr, QNetworkAccessManager *network = 0);
|
|
~AlbumCoverFetcher();
|
|
|
|
static const int kMaxConcurrentRequests;
|
|
|
|
quint64 SearchForCovers(const QString &artist, const QString &album, const QString &title = QString());
|
|
quint64 FetchAlbumCover(const QString &artist, const QString &album, const QString &title, const bool fetchall);
|
|
|
|
void Clear();
|
|
|
|
signals:
|
|
void AlbumCoverFetched(const quint64 request_id, const QUrl &cover_url, const QImage &cover, const CoverSearchStatistics &statistics);
|
|
void SearchFinished(const quint64 request_id, const CoverSearchResults &results, const CoverSearchStatistics &statistics);
|
|
|
|
private slots:
|
|
void SingleSearchFinished(const quint64, const CoverSearchResults results);
|
|
void SingleCoverFetched(const quint64, const QUrl &cover_url, const QImage &image);
|
|
void StartRequests();
|
|
|
|
private:
|
|
void AddRequest(const CoverSearchRequest &req);
|
|
|
|
CoverProviders *cover_providers_;
|
|
QNetworkAccessManager *network_;
|
|
quint64 next_id_;
|
|
|
|
QQueue<CoverSearchRequest> queued_requests_;
|
|
QHash<quint64, AlbumCoverFetcherSearch*> active_requests_;
|
|
|
|
QTimer *request_starter_;
|
|
|
|
};
|
|
|
|
#endif // ALBUMCOVERFETCHER_H
|