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// SPDX-License-Identifier: GPL-2.0
#ifndef VIDEOFRAMEEXTRACTOR_H
#define VIDEOFRAMEEXTRACTOR_H
#include "core/units.h"
#include <QMutex>
#include <QFuture>
#include <QThreadPool>
#include <QQueue>
#include <QString>
#include <QPair>
class VideoFrameExtractor : public QObject {
Q_OBJECT
public:
VideoFrameExtractor();
static VideoFrameExtractor *instance();
signals:
void extracted(QString filename, QImage, duration_t duration, duration_t offset);
// There are two failure modes:
// failed() -> we failed to start ffmpeg. Write a thumbnail signalling "maybe try again".
// invalid() -> we started ffmpeg, but that couldn't extract an image. Signal "this file is broken".
void failed(QString filename, duration_t duration);
void invalid(QString filename, duration_t duration);
public slots:
void extract(QString originalFilename, QString filename, duration_t duration);
void clearWorkQueue();
private:
void processItem(QString originalFilename, QString filename, duration_t duration);
void fail(const QString &originalFilename, duration_t duration, bool isInvalid);
mutable QMutex lock;
QThreadPool pool;
QMap<QString, QFuture<void>> workingOn;
};
#endif
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