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48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
#ifndef CAMERA_H
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#define CAMERA_H
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#include <QCamera>
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#include <QVideoFrame>
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#include <QAbstractVideoSurface>
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#include "vpx/vpx_image.h"
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/**
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* This class is a wrapper to share a camera's captured video frames
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* In Qt cameras normally only send their frames to a single output at a time
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* So you can't, for example, send the frames over the network
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* and output them to a widget on the screen at the same time
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*
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* Instead this class allows objects to surscribe and unsuscribe, starting
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* the camera only when needed, and giving access to the last frame
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**/
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class Camera : private QAbstractVideoSurface
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{
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Q_OBJECT
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public:
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Camera();
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void suscribe(); ///< Call this once before trying to get frames
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void unsuscribe(); ///< Call this once when you don't need frames anymore
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QVideoFrame getLastFrame(); ///< Get the last captured frame
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QImage getLastImage(); ///< Convert the last frame to a QImage (can be expensive !)
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vpx_image getLastVPXImage(); ///< Convert the last frame to a vpx_image (can be expensive !)
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bool isFormatSupported(const QVideoSurfaceFormat & format) const;
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private slots:
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void onCameraError(QCamera::Error value);
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private:
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bool start(const QVideoSurfaceFormat &format);
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bool present(const QVideoFrame &frame);
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QList<QVideoFrame::PixelFormat> supportedPixelFormats(QAbstractVideoBuffer::HandleType handleType) const;
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private:
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int refcount; ///< Number of users suscribed to the camera
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QCamera *camera;
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QVideoFrame lastFrame;
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int frameFormat;
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QList<QVideoFrame::PixelFormat> supportedFormats;
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};
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#endif // CAMERA_H
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