hyperion.ng/libsrc/leddevice/LedUdpDevice.cpp

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// STL includes
#include <cstring>
#include <cstdio>
#include <iostream>
// Linux includes
#include <fcntl.h>
#include <sys/ioctl.h>
#include <QStringList>
#include <QUdpSocket>
#include <QHostInfo>
// Local Hyperion includes
#include "LedUdpDevice.h"
LedUdpDevice::LedUdpDevice(const std::string& outputDevice, const unsigned baudrate, const int latchTime_ns) :
mDeviceName(outputDevice),
mBaudRate_Hz(baudrate),
mLatchTime_ns(latchTime_ns)
{
udpSocket = new QUdpSocket();
QString str = QString::fromStdString(mDeviceName);
QStringList _list = str.split(":");
if (_list.size() != 2) {
Error( _log, "Error parsing hostname:port");
exit (-1);
}
QHostInfo info = QHostInfo::fromName(_list.at(0));
if (!info.addresses().isEmpty()) {
_address = info.addresses().first();
// use the first IP address
}
_port = _list.at(1).toInt();
}
LedUdpDevice::~LedUdpDevice()
{
udpSocket->close();
}
int LedUdpDevice::open()
{
QHostAddress _localAddress = QHostAddress::Any;
quint16 _localPort = 0;
WarningIf( !udpSocket->bind(_localAddress, _localPort),
_log, "Couldnt bind local address: %s", strerror(errno));
return 0;
}
int LedUdpDevice::writeBytes(const unsigned size, const uint8_t * data)
{
qint64 retVal = udpSocket->writeDatagram((const char *)data,size,_address,_port);
if (retVal >= 0 && mLatchTime_ns > 0)
{
// The 'latch' time for latching the shifted-value into the leds
timespec latchTime;
latchTime.tv_sec = 0;
latchTime.tv_nsec = mLatchTime_ns;
// Sleep to latch the leds (only if write succesfull)
nanosleep(&latchTime, NULL);
} else {
Warning( _log, "Error sending: %s", strerror(errno));
}
return retVal;
}