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,
int hyperionPriority) :
_timeout_ms(1000),
_priority(hyperionPriority),
_grabber(device,
input,
videoStandard,
pixelFormat,
width,
height,
frameDecimation,
pixelDecimation,
pixelDecimation),
_processor(ImageProcessorFactory::getInstance().newImageProcessor()),
_hyperion(Hyperion::getInstance()),
_ledColors(Hyperion::getInstance()->getLedCount(), ColorRgb{0,0,0}),
_timer()
{
// 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);
// 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 hisher priority is active
_timer.setInterval(500);
_timer.setSingleShot(false);
QObject::connect(&_timer, SIGNAL(timeout()), this, SLOT(checkSources()));
_timer.start();
}
V4L2Wrapper::~V4L2Wrapper()
{
delete _processor;
}
bool V4L2Wrapper::start()
{
bool grabber_started = _grabber.start();
if ( ! grabber_started )
_timer.stop();
return grabber_started;
}
void V4L2Wrapper::stop()
{
_grabber.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)
{
// process the new image
_processor->process(image, _ledColors);
// forward to other hyperions
emit emitImage(_priority, image, _timeout_ms);
// send colors to Hyperion
emit emitColors(_priority, _ledColors, _timeout_ms);
}
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();
}