public static bool Load()
{
_logger.Debug("Load()");
if (!Initialized)
{
try
{
var result = DCapt.DCaptLoad(out hLoad);
if (result == DCapt.CaptError.DESKCAPT_ERROR_API_ALREADY_LOADED)
{
//...
}
DCapt.ThrowIfError(result, "DCaptLoad");
Initialized = true;
}
catch (Exception ex)
{
_logger.Error(ex);
}
}
return(Initialized);
}
public static void Unload()
{
_logger.Debug("Unload()");
try
{
if (hLoad != IntPtr.Zero)
{
DCapt.DCaptFree(hLoad);
hLoad = IntPtr.Zero;
Initialized = false;
}
}
catch (Exception ex)
{
_logger.Error(ex);
}
}
public override void Close()
{
logger.Debug("DatapathDesktopCapture::Close()");
if (Initialized)
{
if (hCapt != IntPtr.Zero)
{
var result = DCapt.DCaptFreeCapture(hCapt);
DCapt.ThrowIfError(result, "DCaptFreeCapture");
hCapt = IntPtr.Zero;
}
if (pBuffer != IntPtr.Zero)
{// создается в DCaptConfigureCapture соответственно удаляется в DCaptFreeCapture() !!
// Marshal.FreeHGlobal(pBuffer);
pBuffer = IntPtr.Zero;
}
this.bmi = default(BITMAPINFO);
}
base.Close();
}
private void Init(Rectangle captArea, Bitmap bmp)
{
if (!(bmp.PixelFormat == PixelFormat.Format16bppRgb565 || bmp.PixelFormat == PixelFormat.Format16bppRgb565))
{
throw new FormatException("Unsuppoted pix format " + bmp.PixelFormat);
}
try
{
var result = DCapt.DCaptCreateCapture(hLoad, out hCapt);
DCapt.ThrowIfError(result, "DCaptCreateCapture");
logger.Debug("DCaptCreateCapture() " + result);
int biWidth = bmp.Width;
int biHeight = bmp.Height;
//
int biBitCount = Image.GetPixelFormatSize(bmp.PixelFormat);
uint biSizeImage = (uint)(biWidth * biHeight * biBitCount / 8);
const int BI_BITFIELDS = 3;
var bmiHeader = new BITMAPINFOHEADER
{
biWidth = biWidth,
biHeight = -biHeight,
biSize = (uint)Marshal.SizeOf(typeof(BITMAPINFOHEADER)),
biBitCount = (ushort)biBitCount,
biPlanes = 1,
biClrUsed = 0,
biClrImportant = 0,
biSizeImage = biSizeImage,
biCompression = BI_BITFIELDS,
};
var bmiColors = GetColourMask(bmp.PixelFormat);
//var bmiColors = new RGBQUAD[]
//{
// new RGBQUAD
// {
// rgbRed = 0,
// rgbBlue = 248,
// rgbGreen = 0
// }
//};
BITMAPINFO bmi = new BITMAPINFO
{
bmiHeader = bmiHeader,
// bmiColors = bmiColors,
};
var dstSize = bmp.Size;
RECT srcRect = new RECT
{
Left = captArea.Left,
Right = captArea.Right,
Bottom = captArea.Bottom,
Top = captArea.Top,
};
IntPtr _hBmi = IntPtr.Zero;
try
{
_hBmi = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(BITMAPINFO)));
Marshal.StructureToPtr(bmi, _hBmi, false);
IntPtr hBmi = _hBmi;
// The bits per pixel of the saved data. Must be 2
int bitsPerPixel = 2;//biBitCount / 8;
result = DCapt.DCaptConfigureCapture(hCapt, ref srcRect, ref dstSize, bitsPerPixel, DCapt.CaptFlags.CAPTURE_FLAG_OVERLAY, ref pBuffer, ref hBmi);
DCapt.ThrowIfError(result, "DCaptConfigureCapture");
this.bmi = (BITMAPINFO)Marshal.PtrToStructure(hBmi, typeof(BITMAPINFO));
var _bmiHeader = bmi.bmiHeader;
logger.Debug("_bmiHeader " + _bmiHeader.biWidth + "x" + _bmiHeader.biHeight + " "
+ _bmiHeader.biBitCount + " " + _bmiHeader.biCompression + " " + _bmiHeader.biSizeImage);
}
finally
{
if (_hBmi != IntPtr.Zero)
{
Marshal.FreeHGlobal(_hBmi);
}
}
}
catch (Exception ex)
{
logger.Error(ex);
Close();
throw;
}
}
public override ErrorCode UpdateBuffer(int timeout = 10)
{
logger.Verb("Update(...) " + timeout);
ErrorCode errorCode = ErrorCode.Unexpected;
if (!Initialized)
{
return(ErrorCode.NotInitialized);
}
var bufSize = bmi.bmiHeader.biSizeImage;
if (bufSize > 0)
{
Kernel32.ZeroMemory(pBuffer, (int)bufSize);
var result = DCapt.DCaptUpdate(hCapt);
DCapt.ThrowIfError(result, "DCaptCreateCapture");
var syncRoot = videoBuffer.syncRoot;
bool lockTaken = false;
try
{
Monitor.TryEnter(syncRoot, timeout, ref lockTaken);
if (lockTaken)
{
var sharedBits = videoBuffer.bitmap;
var rect = new Rectangle(0, 0, sharedBits.Width, sharedBits.Height);
var data = sharedBits.LockBits(rect, ImageLockMode.ReadWrite, sharedBits.PixelFormat);
try
{
IntPtr scan0 = data.Scan0;
Kernel32.CopyMemory(scan0, this.pBuffer, (uint)bufSize);
errorCode = ErrorCode.Ok;
}
finally
{
sharedBits.UnlockBits(data);
}
}
else
{
logger.Warn("Drop bits...");
}
}
finally
{
if (lockTaken)
{
Monitor.Exit(syncRoot);
}
}
}
return(errorCode);
// Console.WriteLine("DCaptCreateCapture() " + result);
}
