hyperion.ng/include/hyperion/GrabberWrapper.h
2020-06-17 20:55:57 +02:00

166 lines
4.2 KiB
C++

#pragma once
#include <QObject>
#include <QJsonObject>
#include <QJsonArray>
#include <QString>
#include <QStringList>
#include <QMultiMap>
#include <utils/Logger.h>
#include <utils/Components.h>
#include <utils/Image.h>
#include <utils/ColorRgb.h>
#include <utils/VideoMode.h>
#include <utils/settings.h>
class Grabber;
class GlobalSignals;
class QTimer;
/// List of Hyperion instances that requested screen capt
static QList<int> GRABBER_SYS_CLIENTS;
static QList<int> GRABBER_V4L_CLIENTS;
///
/// This class will be inherted by FramebufferWrapper and others which contains the real capture interface
///
class GrabberWrapper : public QObject
{
Q_OBJECT
public:
GrabberWrapper(QString grabberName, Grabber * ggrabber, unsigned width, unsigned height, const unsigned updateRate_Hz = 0);
virtual ~GrabberWrapper();
static GrabberWrapper* instance;
static GrabberWrapper* getInstance(){ return instance; }
///
/// 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();
///
/// @brief Get a list of all available V4L devices
/// @return List of all available V4L devices on success else empty List
///
virtual QStringList getV4L2devices();
///
/// @brief Get the V4L device name
/// @param devicePath The device path
/// @return The name of the V4L device on success else empty String
///
virtual QString getV4L2deviceName(QString devicePath);
///
/// @brief Get a name/index pair of supported device inputs
/// @param devicePath The device path
/// @return multi pair of name/index on success else empty pair
///
virtual QMultiMap<QString, int> getV4L2deviceInputs(QString devicePath);
///
/// @brief Get a list of supported device resolutions
/// @param devicePath The device path
/// @return List of resolutions on success else empty List
///
virtual QStringList getResolutions(QString devicePath);
///
/// @brief Get a list of supported device framerates
/// @param devicePath The device path
/// @return List of framerates on success else empty List
///
virtual QStringList getFramerates(QString devicePath);
static QStringList availableGrabbers();
public:
template <typename Grabber_T>
bool transferFrame(Grabber_T &grabber)
{
unsigned w = grabber.getImageWidth();
unsigned h = grabber.getImageHeight();
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
///
virtual void setVideoMode(const VideoMode& videoMode);
///
/// 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);
///
/// @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:
///
/// @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;
/// The timer for generating events with the specified update rate
QTimer* _timer;
/// The calced update rate [ms]
int _updateInterval_ms;
/// The Logger instance
Logger * _log;
Grabber *_ggrabber;
/// The image used for grabbing frames
Image<ColorRgb> _image;
};