private static Bitmap generateSceneshotInMemory(MediaDetClass mediaDet, double position, int width, int height)
{
Bitmap bmp = null;
unsafe
{
//equal to sizeof(CommonClasses.BITMAPINFOHEADER);
int bmpinfoheaderSize = 40;
//get size for buffer
int bufferSize = (((width * height) * 24) / 8) + bmpinfoheaderSize;
//equal to mediaDet.GetBitmapBits
// (0d, ref bufferSize, ref *buffer, target.Width, target.Height);
//allocates enough memory to store the frame
IntPtr frameBuffer =
System.Runtime.InteropServices.Marshal.AllocHGlobal(bufferSize);
byte *frameBuffer2 = (byte *)frameBuffer.ToPointer();
//gets bitmap, save in frameBuffer2
mediaDet.GetBitmapBits(position,
ref bufferSize, ref *frameBuffer2, width, height);
//now in buffer2 we have a BITMAPINFOHEADER structure
//followed by the DIB bits
IntPtr newImage = new IntPtr(frameBuffer2 + bmpinfoheaderSize);
bmp = new Bitmap(width, height, width * 3,
System.Drawing.Imaging.PixelFormat.Format24bppRgb, newImage);
//1. Version
//bmp.RotateFlip(RotateFlipType.Rotate180FlipX);
//2. Version
//bmp.RotateFlip(RotateFlipType.Rotate90FlipX);
//bmp.RotateFlip(RotateFlipType.Rotate90FlipY);
//Test
bmp.RotateFlip(RotateFlipType.RotateNoneFlipY);
System.Runtime.InteropServices.Marshal.FreeHGlobal(frameBuffer);
}
return(bmp);
}
