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#pragma once
#include <QObject>
#include <QPair>
#include <QPixmap>
#include <QSet>
#include <QtDebug>
#include "library/coverart.h"
#include "track/track_decl.h"
#include "util/singleton.h"
class CoverArtCache : public QObject, public Singleton<CoverArtCache> {
Q_OBJECT
public:
static void requestCover(
const QObject* pRequestor,
const CoverInfo& coverInfo) {
requestCover(pRequestor, coverInfo, TrackPointer());
}
static void requestTrackCover(
const QObject* pRequestor,
const TrackPointer& pTrack);
/* This method is used to request a cover art pixmap.
*
* @param pRequestor : an arbitrary pointer (can be any number you'd like,
* really) that will be provided in the coverFound signal for this
* request. This allows you to match requests with their responses.
*
* @param onlyCached : if it is 'true', the method will NOT try to load
* covers from the given 'coverLocation' and it will also NOT run the
* search algorithm.
* In this way, the method will just look into CoverCache and return
* a Pixmap if it is already loaded in the QPixmapCache.
*/
enum class Loading {
CachedOnly,
NoSignal,
Default, // signal when done
};
QPixmap tryLoadCover(
const QObject* pRequestor,
const CoverInfo& info,
int desiredWidth = 0, // <= 0: original size
Loading loading = Loading::Default) {
return tryLoadCover(
pRequestor,
TrackPointer(),
info,
desiredWidth,
loading);
}
// Only public for testing
struct FutureResult {
FutureResult()
: pRequestor(nullptr),
requestedHash(CoverImageUtils::defaultHash()),
signalWhenDone(false),
coverInfoUpdated(false) {
}
const QObject* pRequestor;
quint16 requestedHash;
bool signalWhenDone;
CoverArt coverArt;
bool coverInfoUpdated;
};
// Load cover from path indicated in coverInfo. WARNING: This is run in a
// worker thread.
static FutureResult loadCover(
const QObject* pRequestor,
TrackPointer pTrack,
CoverInfo coverInfo,
int desiredWidth,
bool emitSignals);
private slots:
// Called when loadCover is complete in the main thread.
void coverLoaded();
signals:
void coverFound(
const QObject* requestor,
const CoverInfo& coverInfo,
const QPixmap& pixmap,
quint16 requestedHash,
bool coverInfoUpdated);
protected:
CoverArtCache();
~CoverArtCache() override = default;
friend class Singleton<CoverArtCache>;
private:
static void requestCover(
const QObject* pRequestor,
const CoverInfo& coverInfo,
const TrackPointer& /*optional*/ pTrack);
QPixmap tryLoadCover(
const QObject* pRequestor,
const TrackPointer& pTrack,
const CoverInfo& info,
int desiredWidth,
Loading loading);
QSet<QPair<const QObject*, quint16>> m_runningRequests;
};
inline
QDebug operator<<(QDebug dbg, CoverArtCache::Loading loading) {
return dbg << static_cast<int>(loading);
}
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