public static bool Start(string device, IEmulationElement loggingParent)
{
#if !PLATFORM_LINUX
throw new RecoverableException("Video capture is supported on Linux only!");
#else
// stop any previous capturer
Stop();
VideoCapturer.loggingParent = loggingParent;
loggingParent.Log(LogLevel.Debug, "Opening device: {0}...", device);
fd = LibCWrapper.Open(device, O_RDWR);
if (fd == -1)
{
loggingParent.Log(LogLevel.Error, "Couldn't open device: {0}", device);
return(false);
}
if (!CheckImageFormat())
{
loggingParent.Log(LogLevel.Error, "Device does not support JPEG output: {0}", device);
LibCWrapper.Close(fd);
return(false);
}
started = true;
return(RequestBuffer());
#endif
}
private static int Open_TUNTAP(IntPtr dev, UInt16 flags, bool persistent)
{
var ifr = Marshal.AllocHGlobal(IFR_SIZE); // we need 40 bytes, but we allocate a bit more
var fd = LibCWrapper.Open("/dev/net/tun", O_RDWR);
if (fd < 0)
{
Console.Error.WriteLine("Could not open /dev/net/tun, error: {0}", Marshal.GetLastWin32Error());
return(fd);
}
var memory = new byte[IFR_SIZE];
Array.Clear(memory, 0, IFR_SIZE);
var bytes = BitConverter.GetBytes(flags);
Array.Copy(bytes, 0, memory, IFNAMSIZ, 2);
if (dev != IntPtr.Zero)
{
var devBytes = Encoding.ASCII.GetBytes(Marshal.PtrToStringAnsi(dev));
Array.Copy(devBytes, memory, Math.Min(devBytes.Length, IFNAMSIZ));
}
Marshal.Copy(memory, 0, ifr, IFR_SIZE);
int err = 0;
if ((err = LibCWrapper.Ioctl(fd, TUNSETIFF, ifr)) < 0)
{
Console.Error.WriteLine("Could not set TUNSETIFF, error: {0}", Marshal.GetLastWin32Error());
LibCWrapper.Close(fd);
return(err);
}
if (persistent)
{
if ((err = LibCWrapper.Ioctl(fd, TUNSETPERSIST, 1)) < 0)
{
Console.Error.WriteLine("Could not set TUNSETPERSIST, error: {0}", Marshal.GetLastWin32Error());
LibCWrapper.Close(fd);
return(err);
}
}
LibCWrapper.Strcpy(dev, ifr);
Marshal.FreeHGlobal(ifr);
return(fd);
}
