setup electron app with boilerplate

cpp/src/media/mediahandler.h

@@ -0,0 +1,99 @@
+#ifndef MEDIAHANDLER_H
+#define MEDIAHANDLER_H
+
+#include <QObject>
+#include <QMediaDevices>
+
+QT_BEGIN_NAMESPACE
+class QMediaCaptureSession;
+class QVideoSink;
+class QAudioInput;
+class QCamera;
+class QMediaRecorder;
+QT_END_NAMESPACE
+
+// TODO: create simple structs to represent camera and audio input devices
+
+/// MediaHandler allows you to preview and capture video, audio, and screen
+class MediaHandler : public QObject
+{
+  Q_OBJECT
+
+public:
+  explicit MediaHandler(QObject *parent = nullptr);
+  ~MediaHandler();
+
+  enum State
+  {
+    OFF = 0,
+    PREPARING,
+    ON,
+    RECORDING
+  };
+  State state() const;
+
+  enum CaptureMode
+  {
+    AUDIO_ONLY = 0,
+    CAMERA,
+    SCREEN
+  };
+  CaptureMode captureMode() const;
+
+  QVideoSink *videoSink() const;
+
+  // QList<CameraDevices>
+  // QList<AudioDevices>
+
+public slots:
+  /// Only impacts the next time start is called
+  void setCaptureMode(CaptureMode);
+
+  /// Start preview: OFF → ON
+  void startPreview(QVideoSink *sink = nullptr);
+
+  /// Start recording: OFF → ON → RECORDING (auto-records when ready)
+  ///                  or ON → RECORDING (immediate)
+  void startRecording(QVideoSink *sink = nullptr);
+
+  /// Clean up resources, will stop all capture, recording, preview
+  void stop();
+
+  void recordCancel();
+  void recordStop();
+
+  // void setCameraDevice();
+  // void setAudioInputDevice();
+
+signals:
+  /// User has denied mic permission, and must go to settings to enable
+  void micPermissionDenied();
+  /// User has denied camera permission, and must go to settings to enable
+  void cameraPermissionDenied();
+
+  void captureModeChanged();
+  void stateChanged();
+
+  void recordingComplete(const QUrl &absoluteFilePath, qint64 durationMs, const QString &mimeType);
+
+  void errorOccurred(const QString &);
+
+private:
+  QMediaCaptureSession *m_captureSession;
+  QAudioInput *m_audioInput;
+  QCamera *m_camera;
+  QVideoSink *m_videoSink;
+  QMediaRecorder *m_recorder;
+  QMediaDevices m_devices;
+
+  CaptureMode m_captureMode = CAMERA;
+  State m_state = OFF;
+  void setState(State);
+
+  void startCapture(QVideoSink *sink);
+
+  bool m_pendingRecord = false;
+  bool m_cancelledRecording = false;
+};
+
+#endif //MEDIAHANDLER_H