CuteLogger
Fast and simple logging solution for Qt based applications
producerpreviewwidget.h
1 /*
2  * Copyright (c) 2020 Meltytech, LLC
3  *
4  * This program is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation, either version 3 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #ifndef PRODUCERPREVIEWWIDGET_H
19 #define PRODUCERPREVIEWWIDGET_H
20 
21 #include "dataqueue.h"
22 
23 #include <MltProducer.h>
24 
25 #include <QFuture>
26 #include <QPixmap>
27 #include <QWidget>
28 
29 class QLabel;
30 class ScrubBar;
31 
32 class ProducerPreviewWidget : public QWidget
33 {
34  Q_OBJECT
35 
36 public:
37  explicit ProducerPreviewWidget(double dar, int width = 320);
38  virtual ~ProducerPreviewWidget();
39 
40  void start(const Mlt::Producer &producer);
41  void stop(bool releaseProducer = true);
42  void showText(QString text);
43  void setLooping(bool enabled);
44 
45 public slots:
46  void restart();
47 
48 private slots:
49  void seeked(int);
50 
51 private:
52  void timerEvent(QTimerEvent *) override;
53  void frameGeneratorThread();
54  void generateFrame();
55 
56  QSize m_previewSize;
57  QLabel *m_imageLabel;
58  ScrubBar *m_scrubber;
59  QLabel *m_posLabel;
60  int m_seekTo;
61  int m_timerId;
62  Mlt::Producer m_producer;
63  struct QueueItem {
64  QPixmap pixmap;
65  int position;
66  QString positionText;
67  };
68  DataQueue<QueueItem> m_queue;
69  QFuture<void> m_future;
70  bool m_generateFrames;
71  bool m_isLooping;
72 };
73 
74 #endif // PRODUCERPREVIEWWIDGET_H