hyperion.ng/libsrc/grabber/v4l2/V4L2Wrapper.cpp

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#include <QMetaType>
#include <grabber/V4L2Wrapper.h>
#include <hyperion/ImageProcessorFactory.h>
V4L2Wrapper::V4L2Wrapper(const std::string &device,
int input,
VideoStandard videoStandard,
PixelFormat pixelFormat,
int width,
int height,
int frameDecimation,
int pixelDecimation,
double redSignalThreshold,
double greenSignalThreshold,
double blueSignalThreshold,
const int priority)
: GrabberWrapper("V4L2", priority)
, _timeout_ms(1000)
, _grabber(device,
input,
videoStandard,
pixelFormat,
width,
height,
frameDecimation,
pixelDecimation,
pixelDecimation)
, _ledColors(Hyperion::getInstance()->getLedCount(), ColorRgb{0,0,0})
{
// set the signal detection threshold of the grabber
_grabber.setSignalThreshold( redSignalThreshold, greenSignalThreshold, blueSignalThreshold, 50);
// register the image type
qRegisterMetaType<Image<ColorRgb>>("Image<ColorRgb>");
qRegisterMetaType<std::vector<ColorRgb>>("std::vector<ColorRgb>");
// Handle the image in the captured thread using a direct connection
QObject::connect(&_grabber, SIGNAL(newFrame(Image<ColorRgb>)), this, SLOT(newFrame(Image<ColorRgb>)), Qt::DirectConnection);
QObject::connect(&_grabber, SIGNAL(readError(const char*)), this, SLOT(readError(const char*)), Qt::DirectConnection);
// send color data to Hyperion using a queued connection to handle the data over to the main event loop
// QObject::connect(
// this, SIGNAL(emitColors(int,std::vector<ColorRgb>,int)),
// _hyperion, SLOT(setColors(int,std::vector<ColorRgb>,int)),
// Qt::QueuedConnection);
// setup the higher prio source checker
// this will disable the v4l2 grabber when a source with higher priority is active
_timer.setInterval(500);
}
V4L2Wrapper::~V4L2Wrapper()
{
}
bool V4L2Wrapper::start()
{
return ( _grabber.start() && GrabberWrapper::start());
}
void V4L2Wrapper::stop()
{
_grabber.stop();
GrabberWrapper::stop();
}
void V4L2Wrapper::setCropping(int cropLeft, int cropRight, int cropTop, int cropBottom)
{
_grabber.setCropping(cropLeft, cropRight, cropTop, cropBottom);
}
void V4L2Wrapper::set3D(VideoMode mode)
{
_grabber.set3D(mode);
}
void V4L2Wrapper::newFrame(const Image<ColorRgb> &image)
{
// forward to other hyperions
if ( _forward )
{
emit emitImage(_priority, image, _timeout_ms);
}
// process the new image
_processor->process(image, _ledColors);
_hyperion->setColors(_priority, _ledColors, _timeout_ms);
}
void V4L2Wrapper::readError(const char* err)
{
Error(_log, "stop grabber, because reading device failed. (%s)", err);
stop();
}
void V4L2Wrapper::checkSources()
{
QList<int> activePriorities = _hyperion->getActivePriorities();
for (int x : activePriorities)
{
if (x < _priority)
{
// found a higher priority source: grabber should be disabled
_grabber.stop();
return;
}
}
// no higher priority source was found: grabber should be enabled
_grabber.start();
}
void V4L2Wrapper::action()
{
checkSources();
}