// Implementation of a video capture callback
public static int CommonCaptureCallback
(
IntPtr hwnd,
ref VIDEOHDR videoHdr
)
{
// Attempt to find an instance of STVideoCapture with the specified hwnd.
// If found, call it's delegate.
foreach (STVideoCapture videoCapture in STVideoCapture.mListOfActiveInstances)
{
if (videoCapture.mHWNDCapture == hwnd)
{
return(videoCapture.InstanceCaptureCallback(hwnd, ref videoHdr));
}
}
return(0);
}
/// <summary>
/// 捕获视频事件
/// </summary>
/// <param name="sender"></param>
/// <param name="hdr"></param>
private void vc_VideoCaptured(object sender, VIDEOHDR hdr)
{
try
{
byte[] data = new byte[hdr.dwBytesUsed];
Marshal.Copy(hdr.lpData, data, 0, hdr.dwBytesUsed);
this.drawDib.Draw(data, this.controlVideo);
if (this.VideoDataCapturered != null)
{
this.VideoDataCapturered(this, new VideoCapturedEventArgs(this.bitmapInfo, data));
}
}
catch (System.Exception ex)
{
System.Diagnostics.Trace.WriteLine(ex.Message + ":" + ex.StackTrace);
}
}
/// <summary>
/// 捕获视频事件
/// </summary>
/// <param name="sender"></param>
/// <param name="hdr"></param>
private void vc_VideoCaptured(object sender,VIDEOHDR hdr)
{
try
{
byte[] data = new byte[hdr.dwBytesUsed];
Marshal.Copy(hdr.lpData, data, 0, hdr.dwBytesUsed);
this.drawDib.Draw(data, this.controlVideo);
if (this.VideoDataCapturered != null)
this.VideoDataCapturered(this, new VideoCapturedEventArgs(this.bitmapInfo, data));
}
catch (System.Exception ex)
{
System.Diagnostics.Trace.WriteLine(ex.Message + ":" + ex.StackTrace);
}
}
public int InstanceCaptureCallback
(
IntPtr hwnd,
ref VIDEOHDR videoHdr
)
{
if (null == mClientCaptureCallback)
{
return(0);
}
// Copy image data to local buffer before calling client
int captureWidth = 0;
int captureHeight = 0;
captureWidth = this.GetCaptureWidth( );
captureHeight = this.GetCaptureHeight( );
int sourceStrideBytes = 0;
int sourceCopyStartByteOffset = 0;
int destinationStrideBytes = 0;
int destinationCopyStartByteOffset = 0;
int bytesToCopyPerLine = 0;
sourceCopyStartByteOffset = 0;
sourceStrideBytes = (captureWidth * 3);
destinationCopyStartByteOffset = 0;
destinationStrideBytes = (captureWidth * 3);
bytesToCopyPerLine = (captureWidth * 3);
int lineIndex = 0;
for (lineIndex = 0; lineIndex < captureHeight; lineIndex++)
{
IntPtr sourceLineStartPtr =
new IntPtr(videoHdr.lpData.ToInt32( ) + sourceCopyStartByteOffset);
System.Runtime.InteropServices.Marshal.Copy
(
sourceLineStartPtr,
this.mBGRData,
destinationCopyStartByteOffset,
bytesToCopyPerLine
);
sourceCopyStartByteOffset += sourceStrideBytes;
destinationCopyStartByteOffset += destinationStrideBytes;
}
// Call the client
mClientCaptureCallback
(
this.mBGRData,
this.GetCaptureWidth(),
this.GetCaptureHeight()
);
return(0);
}
private int CallbackVideoStream(IntPtr hwnd, VIDEOHDR lpVHdr)
{
iFrame++;
Marshal.Copy(lpVHdr.lpData, PictureData, 0, lpVHdr.dwBytesUsed);
return(0);
}