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

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