hyperion.ng/include/hyperion/GrabberWrapper.h

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#pragma once
#include <QObject>
#include <QJsonObject>
#include <QJsonArray>
#include <QString>
#include <QStringList>
#include <utils/Logger.h>
#include <utils/Components.h>
#include <utils/Image.h>
#include <utils/ColorRgb.h>
#include <utils/VideoMode.h>
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#include <utils/settings.h>
class Grabber;
class GlobalSignals;
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class QTimer;
/// List of Hyperion instances that requested screen capt
static QList<int> GRABBER_SYS_CLIENTS;
static QList<int> GRABBER_V4L_CLIENTS;
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///
/// This class will be inherted by FramebufferWrapper and others which contains the real capture interface
///
class GrabberWrapper : public QObject
{
Q_OBJECT
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public:
GrabberWrapper(QString grabberName, Grabber * ggrabber, unsigned width, unsigned height, const unsigned updateRate_Hz = 0);
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virtual ~GrabberWrapper();
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///
/// Starts the grabber wich produces led values with the specified update rate
///
virtual bool start();
///
/// Starts maybe the grabber wich produces led values with the specified update rate
///
virtual void tryStart();
///
/// Stop grabber
///
virtual void stop();
static QStringList availableGrabbers();
public:
template <typename Grabber_T>
bool transferFrame(Grabber_T &grabber)
{
unsigned w = grabber.getImageWidth();
unsigned h = grabber.getImageHeight();
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if ( _image.width() != w || _image.height() != h)
{
_image.resize(w, h);
}
int ret = grabber.grabFrame(_image);
if (ret >= 0)
{
emit systemImage(_grabberName, _image);
return true;
}
return false;
}
public slots:
///
/// virtual method, should perform single frame grab and computes the led-colors
///
virtual void action() = 0;
///
/// Set the video mode (2D/3D)
/// @param[in] mode The new video mode
///
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virtual void setVideoMode(const VideoMode& videoMode);
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///
/// Set the crop values
/// @param cropLeft Left pixel crop
/// @param cropRight Right pixel crop
/// @param cropTop Top pixel crop
/// @param cropBottom Bottom pixel crop
///
virtual void setCropping(unsigned cropLeft, unsigned cropRight, unsigned cropTop, unsigned cropBottom);
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///
/// @brief Handle settings update from HyperionDaemon Settingsmanager emit
/// @param type settingyType from enum
/// @param config configuration object
///
virtual void handleSettingsUpdate(const settings::type& type, const QJsonDocument& config);
signals:
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///
/// @brief Emit the final processed image
///
void systemImage(const QString& name, const Image<ColorRgb>& image);
private slots:
/// @brief Handle a source request event from Hyperion.
/// Will start and stop grabber based on active listeners count
void handleSourceRequest(const hyperion::Components& component, const int hyperionInd, const bool listen);
protected:
QString _grabberName;
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/// The timer for generating events with the specified update rate
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QTimer* _timer;
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/// The calced update rate [ms]
int _updateInterval_ms;
/// The Logger instance
Logger * _log;
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Grabber *_ggrabber;
/// The image used for grabbing frames
Image<ColorRgb> _image;
};