void streamLoop(qintptr socketDesc, QQueue<QByteArray> &queue, bool& streaming) {
QTcpSocket* socket = new QTcpSocket();
// TCP_NODELAY + disable Nagle's algorithm
socket->setSocketOption(QAbstractSocket::LowDelayOption, QVariant::fromValue(1));
// Internetwork control
socket->setSocketOption(QAbstractSocket::TypeOfServiceOption, QVariant::fromValue(192));
socket->setSocketDescriptor(socketDesc);
socket->readAll();
QByteArray ContentType = ("HTTP/1.1 200 OK\r\n" \
"Server: test\r\n" \
"Cache-Control: no-cache\r\n" \
"Cache-Control: private\r\n" \
"Connection: close\r\n"\
"Pragma: no-cache\r\n"\
"Content-Type: multipart/x-mixed-replace; boundary=--boundary\r\n\r\n");
socket->write(ContentType);
while((socket->state() != QAbstractSocket::ClosingState ||
socket->state() != QAbstractSocket::UnconnectedState) &&
socket->state() == QAbstractSocket::ConnectedState &&
streaming) {
if(queue.empty()) { // no new frame available
continue;
}
// make sure that the queue doesn't grow too big or
// the OOM killer will kick in
if(queue.length() > 20) {
queue.clear();
continue;
}
QByteArray boundary = ("--boundary\r\n" \
"Content-Type: image/jpeg\r\n" \
"Content-Length: ");
QByteArray img = queue.dequeue();
boundary.append(QString::number(img.length()));
boundary.append("\r\n\r\n");
socket->write(boundary);
socket->waitForBytesWritten();
boundary.clear();
socket->write(img);
socket->waitForBytesWritten();
img.clear();
}
socket->flush();
socket->abort();
socket->deleteLater();
streaming = false;
queue.clear();
return;
}
