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project/fm_viewer/fav/widget/VideoPreviewWidget.h

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+/******************************************************************************
+    VideoRendererTypes: type id and manually id register function
+    Copyright (C) 2015 Wang Bin <wbsecg1@gmail.com>
+
+*   This file is part of QtAV
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+******************************************************************************/
+
+#ifndef QTAV_VIDEOPREVIEWWIDGET_H
+#define QTAV_VIDEOPREVIEWWIDGET_H
+
+#include "global.h"
+#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
+#include <QtWidgets/QWidget>
+#else
+#include <QtGui/QWidget>
+#endif
+
+#define REMOVE_VIDEO_PREVIEW_WIDGET 1
+#if !(REMOVE_VIDEO_PREVIEW_WIDGET)
+
+namespace FAV {
+
+class VideoFrame;
+class VideoOutput;
+class VideoFrameExtractor;
+class Q_AVWIDGETS_EXPORT VideoPreviewWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit VideoPreviewWidget(QWidget *parent = 0);
+    void setTimestamp(qint64 msec);
+    qint64 timestamp() const;
+    void preview();
+    void setFile(const QString& file);
+    QString file() const;
+    // default is false
+    void setKeepAspectRatio(bool value = true);
+    bool isKeepAspectRatio() const;
+Q_SIGNALS:
+    void timestampChanged();
+    void fileChanged();
+protected:
+    virtual void resizeEvent(QResizeEvent *);
+private Q_SLOTS:
+    void displayFrame(const FAV::VideoFrame& frame); //parameter VideoFrame
+    void displayNoFrame();
+
+private:
+    bool m_keep_ar;
+    QString m_file;
+    VideoFrameExtractor *m_extractor;
+    VideoOutput *m_out;
+};
+
+} //namespace FAV
+#endif // QTAV_VIDEOPREVIEWWIDGET_H
+#endif #if !(REMOVE_VIDEO_PREVIEW_WIDGET)