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- /****************************************************************************
- **
- ** Copyright (C) 2017 The Qt Company Ltd.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the examples of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:BSD$
- ** Commercial License Usage
- ** Licensees holding valid commercial Qt licenses may use this file in
- ** accordance with the commercial license agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and The Qt Company. For licensing terms
- ** and conditions see https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://www.qt.io/contact-us.
- **
- ** BSD License Usage
- ** Alternatively, you may use this file under the terms of the BSD license
- ** as follows:
- **
- ** "Redistribution and use in source and binary forms, with or without
- ** modification, are permitted provided that the following conditions are
- ** met:
- ** * Redistributions of source code must retain the above copyright
- ** notice, this list of conditions and the following disclaimer.
- ** * Redistributions in binary form must reproduce the above copyright
- ** notice, this list of conditions and the following disclaimer in
- ** the documentation and/or other materials provided with the
- ** distribution.
- ** * Neither the name of The Qt Company Ltd nor the names of its
- ** contributors may be used to endorse or promote products derived
- ** from this software without specific prior written permission.
- **
- **
- ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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- **
- ** $QT_END_LICENSE$
- **
- ****************************************************************************/
- #ifndef HISTOGRAMWIDGET_H
- #define HISTOGRAMWIDGET_H
- #include <QThread>
- #include <QVideoFrame>
- #include <QAudioBuffer>
- #include <QWidget>
- class QAudioLevel;
- class FrameProcessor: public QObject
- {
- Q_OBJECT
- public slots:
- void processFrame(QVideoFrame frame, int levels);
- signals:
- void histogramReady(const QVector<qreal> &histogram);
- };
- class HistogramWidget : public QWidget
- {
- Q_OBJECT
- public:
- explicit HistogramWidget(QWidget *parent = nullptr);
- ~HistogramWidget();
- void setLevels(int levels) { m_levels = levels; }
- public slots:
- void processFrame(const QVideoFrame &frame);
- void processBuffer(const QAudioBuffer &buffer);
- void setHistogram(const QVector<qreal> &histogram);
- protected:
- void paintEvent(QPaintEvent *event) override;
- private:
- QVector<qreal> m_histogram;
- int m_levels = 128;
- FrameProcessor m_processor;
- QThread m_processorThread;
- bool m_isBusy = false;
- QVector<QAudioLevel *> m_audioLevels;
- };
- #endif // HISTOGRAMWIDGET_H
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