public TVViewer()
{
// initialize sdl stuff
screen = Sdl.SDL_SetVideoMode(720, 576, 32, Sdl.SDL_HWSURFACE | Sdl.SDL_DOUBLEBUF);
yuvOverlay = Sdl.SDL_CreateYUVOverlay(720, 576, Sdl.SDL_YUY2_OVERLAY, screen);
rect = new Sdl.SDL_Rect(0, 0, 720, 576);
pixels = Marshal.ReadIntPtr(Marshal.ReadIntPtr(yuvOverlay, 20));
// initialize adapter
adapter = new Adapter("/dev/video0");
adapter.SetControlValue(Control.Mute, 0);
// set desired capture method
adapter.CaptureMethod = CaptureMethod.ReadWrite;
// set video format
VideoCaptureFormat format = new VideoCaptureFormat(720, 576);
format.PixelFormat = v4l2_pix_format_id.YUYV;
format.Field = v4l2_field.Interlaced;
adapter.SetFormat(format);
adapter.Input = adapter.Inputs[adapter.Inputs.IndexOf("Name", "Television")];
adapter.Standard = adapter.Standards[adapter.Standards.IndexOf("Name", "PAL")];
Events.Quit += quit;
Events.KeyboardDown += keyDown;
}
static void RawToPGM(string extra,long stamp, VideoCaptureFormat format, byte[] buffer, bool save)
{
if (!save) { return; }
int w = (int)format.Width, h = (int)format.Height;
string name = stamp.ToString("000000000000") + extra + ".pgm";
FileStream fs = File.Open(name,FileMode.CreateNew,FileAccess.Write,FileShare.Read);
string header = "P5 "+w+" "+h+" 65535 ";
byte[] bh = Encoding.ASCII.GetBytes(header);
fs.Write(bh,0,bh.Length);
fs.Write(buffer,0,buffer.Length);
fs.Close();
}
static byte[] Init(Adapter adapter, out VideoCaptureFormat format)
{
format = new VideoCaptureFormat() {
Field = Video4Linux.Analog.Kernel.v4l2_field.Any
,Width = 358,Height = 288
,PixelFormat = Video4Linux.Analog.Kernel.v4l2_pix_format_id.GREY
};
adapter.SetFormat(format);
//adapter.GetFormat(format);
int count = (int)(format.Width*format.Height*2);
byte[] buffer = new byte[count];
//WL("Method "+adapter.CaptureMethod+" "+format.Width+" "+format.Height+" "+format.PixelFormat+" "+format.Field+" "+format.BytesPerLine+" "+count);
return buffer;
}
