kthumb.h 1.62 KB
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/*
Copyright (C) 2016  Jean-Baptiste Mardelle <jb@kdenlive.org>
This file is part of Kdenlive. See www.kdenlive.org.

This program 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 2 of
the License or (at your option) version 3 or any later version
accepted by the membership of KDE e.V. (or its successor approved
by the membership of KDE e.V.), which shall act as a proxy 
defined in Section 14 of version 3 of the license.

This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
*/
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#ifndef KTHUMB_H
#define KTHUMB_H

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#include <QImage>
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#include <QUrl>
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#include <mlt++/Mlt.h>
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namespace Mlt
{
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class Producer;
class Frame;
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}
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namespace KThumb
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{
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    QPixmap getImage(const QUrl &url, int width, int height = -1);
    QPixmap getImage(const QUrl &url, int frame, int width, int height = -1);
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    QImage getFrame(Mlt::Producer *producer, int framepos, int displayWidth, int height);
    QImage getFrame(Mlt::Frame *frame, int width, int height);
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    /** @brief Calculates image variance, useful to know if a thumbnail is interesting. 
     *  @return an integer between 0 and 100. 0 means no variance, eg. black image while bigger values mean contrasted image
     * */
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    uint imageVariance(const QImage &image);
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};

#endif