hyperion.ng/include/dispmanx-grabber/DispmanxWrapper.h

87 lines
2.1 KiB
C++

#pragma once
// QT includes
#include <QObject>
#include <QTimer>
// Utils includes
#include <utils/RgbColor.h>
#include <utils/RgbImage.h>
#include <utils/GrabbingMode.h>
// Forward class declaration
class DispmanxFrameGrabber;
class Hyperion;
class ImageProcessor;
///
/// The DispmanxWrapper uses an instance of the DispmanxFrameGrabber to obtain RgbImage's from the
/// displayed content. This RgbImage is processed to a RgbColor for each led and commmited to the
/// attached Hyperion.
///
class DispmanxWrapper: public QObject
{
Q_OBJECT
public:
///
/// Constructs the dispmanx frame grabber with a specified grab size and update rate.
///
/// @param[in] grabWidth The width of the grabbed image [pixels]
/// @param[in] grabHeight The height of the grabbed images [pixels]
/// @param[in] updateRate_Hz The image grab rate [Hz]
/// @param[in] hyperion The instance of Hyperion used to write the led values
///
DispmanxWrapper(const unsigned grabWidth, const unsigned grabHeight, const unsigned updateRate_Hz, Hyperion * hyperion);
///
/// Destructor of this dispmanx frame grabber. Releases any claimed resources.
///
virtual ~DispmanxWrapper();
public slots:
///
/// Starts the grabber wich produces led values with the specified update rate
///
void start();
///
/// Performs a single frame grab and computes the led-colors
///
void action();
///
/// Stops the grabber
///
void stop();
///
/// \brief Set the grabbing mode
/// \param mode The new grabbing mode
///
void setGrabbingMode(GrabbingMode mode);
private:
/// The update rate [Hz]
const int _updateInterval_ms;
/// The timeout of the led colors [ms]
const int _timeout_ms;
/// The priority of the led colors [ms]
const int _priority;
/// The timer for generating events with the specified update rate
QTimer _timer;
/// The image used for grabbing frames
RgbImage _image;
/// The actual grabber
DispmanxFrameGrabber * _frameGrabber;
/// The processor for transforming images to led colors
ImageProcessor * _processor;
/// The list with computed led colors
std::vector<RgbColor> _ledColors;
/// Pointer to Hyperion for writing led values
Hyperion * _hyperion;
};