void MainWindow::createUI()
{
tabs = new QTabWidget(this);
sis3150usbUI = new Sis3150usbUI(this->sis3150);
connect(sis3150usbUI,SIGNAL(deviceOpened()),this,SLOT(connectDevicesTo3150()));
sis3350UI = new Sis3350UI(this->sis);
tabs->addTab(sis3150usbUI,tr("sis3150"));
tabs->addTab(sis3350UI, tr("sis3350"));
this->setCentralWidget(tabs);
}
/**
* @brief Opens the video device and starts streaming.
* @note Callers must own the biglock.
* @return True if success, false otherwise.
*/
bool CameraSource::openDevice()
{
qDebug() << "Opening device " << deviceName;
if (device) {
device->open();
return true;
}
// We need to create a new CameraDevice
AVCodec* codec;
device = CameraDevice::open(deviceName, mode);
if (!device) {
qWarning() << "Failed to open device!";
return false;
}
// We need to open the device as many time as we already have subscribers,
// otherwise the device could get closed while we still have subscribers
for (int i = 0; i < subscriptions; ++i)
device->open();
// Find the first video stream
for (unsigned i = 0; i < device->context->nb_streams; ++i) {
if (device->context->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
videoStreamIndex = i;
break;
}
}
if (videoStreamIndex == -1) {
qWarning() << "Video stream not found";
return false;
}
// Get a pointer to the codec context for the video stream
cctxOrig = device->context->streams[videoStreamIndex]->codec;
codec = avcodec_find_decoder(cctxOrig->codec_id);
if (!codec) {
qWarning() << "Codec not found";
return false;
}
// Copy context, since we apparently aren't allowed to use the original
cctx = avcodec_alloc_context3(codec);
if (avcodec_copy_context(cctx, cctxOrig) != 0) {
qWarning() << "Can't copy context";
return false;
}
cctx->refcounted_frames = 1;
// Open codec
if (avcodec_open2(cctx, codec, nullptr) < 0) {
qWarning() << "Can't open codec";
avcodec_free_context(&cctx);
return false;
}
if (streamFuture.isRunning())
qDebug() << "The stream thread is already running! Keeping the current one open.";
else
streamFuture = QtConcurrent::run(std::bind(&CameraSource::stream, this));
// Synchronize with our stream thread
while (!streamFuture.isRunning())
QThread::yieldCurrentThread();
emit deviceOpened();
return true;
}