File indexing completed on 2024-05-12 16:35:05

0001  /* This file is part of the KDE project
0002  * Copyright (C) 2012 Gopalakrishna Bhat A <gopalakbhat@gmail.com>
0003  *
0004  * This library is free software; you can redistribute it and/or
0005  * modify it under the terms of the GNU Library General Public
0006  * License as published by the Free Software Foundation; either
0007  * version 2 of the License, or (at your option) any later version.
0008  *
0009  * This library is distributed in the hope that it will be useful,
0010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
0011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0012  * Library General Public License for more details.
0013  *
0014  * You should have received a copy of the GNU Library General Public License
0015  * along with this library; see the file COPYING.LIB.  If not, write to
0016  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0017  * Boston, MA 02110-1301, USA.
0018  */
0019 
0020 #ifndef VIDEOTHUMBNAILER_H
0021 #define VIDEOTHUMBNAILER_H
0022 
0023 #include <phonon/MediaObject>
0024 #include <phonon/Global>
0025 #include <phonon/experimental/videodataoutput2.h>
0026 
0027 #include <QObject>
0028 #include <QImage>
0029 #include <QSize>
0030 #include <QEventLoop>
0031 
0032 class VideoData;
0033 
0034 namespace Phonon
0035 {
0036     namespace Experimental
0037     {
0038         class VideoDataOutput2;
0039     }
0040     class MediaObject;
0041 }
0042 
0043 class VideoThumbnailer : public QObject
0044 {
0045     Q_OBJECT
0046 
0047 public:
0048     VideoThumbnailer();
0049     ~VideoThumbnailer();
0050 
0051     void createThumbnail(VideoData *videoData, const QSize &size);
0052     QImage thumbnail();
0053 
0054 Q_SIGNALS:
0055     void thumbnailReady();
0056     void signalCreateThumbnail(VideoData *videoData, const QSize &size);
0057 
0058 private Q_SLOTS:
0059     void slotCreateThumbnail(VideoData *videoData, const QSize &size);
0060     void frameReady(const Phonon::Experimental::VideoFrame2 & frame);
0061     void stateChanged(Phonon::State newState, Phonon::State oldState);
0062 
0063 private:
0064     static bool isFrameInteresting(const QImage &frame);
0065     Phonon::MediaObject m_media;
0066     Phonon::Experimental::VideoDataOutput2 m_vdata;
0067     QSize m_thumbnailSize;
0068     QEventLoop m_eventLoop;
0069     QImage m_thumbnailImage;
0070 };
0071 
0072 #endif //VIDEOTHUMBNAILER_H