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Added functionality to disable the embedded v4l2 grabber when a higher priority source is active

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Former-commit-id: 4c0403584093a1fac29d16b502773c3ed11a13a9
This commit is contained in:
johan
2014-03-22 15:35:25 +01:00
parent c3ba03e0ee
commit 6fafb23a3f
4 changed files with 49 additions and 10 deletions
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22
libsrc/grabber/v4l2/V4L2Grabber.cpp
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@@ -72,10 +72,7 @@ V4L2Grabber::V4L2Grabber(const std::string & device,
V4L2Grabber::~V4L2Grabber()
{
// stop if the grabber was not stopped
if (_streamNotifier != nullptr && _streamNotifier->isEnabled()) {
stop();
}
stop();
uninit_device();
close_device();
}
@@ -103,14 +100,22 @@ void V4L2Grabber::setSignalThreshold(double redSignalThreshold, double greenSign
void V4L2Grabber::start()
{
_streamNotifier->setEnabled(true);
start_capturing();
if (_streamNotifier != nullptr && !_streamNotifier->isEnabled())
{
_streamNotifier->setEnabled(true);
start_capturing();
std::cout << "V4L2 grabber started" << std::endl;
}
}
void V4L2Grabber::stop()
{
stop_capturing();
_streamNotifier->setEnabled(false);
if (_streamNotifier != nullptr && _streamNotifier->isEnabled())
{
stop_capturing();
_streamNotifier->setEnabled(false);
std::cout << "V4L2 grabber stopped" << std::endl;
}
}
void V4L2Grabber::open_device()
@@ -142,6 +147,7 @@ void V4L2Grabber::open_device()
// create the notifier for when a new frame is available
_streamNotifier = new QSocketNotifier(_fileDescriptor, QSocketNotifier::Read);
_streamNotifier->setEnabled(false);
connect(_streamNotifier, SIGNAL(activated(int)), this, SLOT(read_frame()));
}