Qt 5.9 | Qt Multimedia | Camera Example | camera.h Example File

Qt 5.9.4 Reference Documentation

# camera.h Example File

multimediawidgets/camera/camera.h

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      #ifndef CAMERA_H
      #define CAMERA_H

      #include <QCamera>
      #include <QCameraImageCapture>
      #include <QMediaRecorder>

      #include <QMainWindow>

      namespace Ui { class Camera; }

      class Camera : public QMainWindow
      {
          Q_OBJECT

      public:
          explicit Camera(QWidget *parent = nullptr);
          ~Camera();

      private slots:
          void setCamera(const QCameraInfo &cameraInfo);

          void startCamera();
          void stopCamera();

          void record();
          void pause();
          void stop();
          void setMuted(bool);

          void toggleLock();
          void takeImage();
          void displayCaptureError(int, QCameraImageCapture::Error, const QString &errorString);

          void configureCaptureSettings();
          void configureVideoSettings();
          void configureImageSettings();

          void displayRecorderError();
          void displayCameraError();

          void updateCameraDevice(QAction *action);

          void updateCameraState(QCamera::State);
          void updateCaptureMode();
          void updateRecorderState(QMediaRecorder::State state);
          void setExposureCompensation(int index);

          void updateRecordTime();

          void processCapturedImage(int requestId, const QImage &img);
          void updateLockStatus(QCamera::LockStatus, QCamera::LockChangeReason);

          void displayViewfinder();
          void displayCapturedImage();

          void readyForCapture(bool ready);
          void imageSaved(int id, const QString &fileName);

      protected:
          void keyPressEvent(QKeyEvent *event) override;
          void keyReleaseEvent(QKeyEvent *event) override;
          void closeEvent(QCloseEvent *event) override;

      private:
          Ui::Camera *ui;

          QCamera *camera = nullptr;
          QCameraImageCapture *imageCapture = nullptr;
          QMediaRecorder* mediaRecorder = nullptr;

          QImageEncoderSettings imageSettings;
          QAudioEncoderSettings audioSettings;
          QVideoEncoderSettings videoSettings;
          QString videoContainerFormat;
          bool isCapturingImage = false;
          bool applicationExiting = false;
      };

      #endif