public void SetSourcePictureParameters(SourcePicture sourcePicture)
{
int width = sourcePicture.PicWidth;
int height = sourcePicture.PicHeight;
byte[] buffer = new byte[width * height * 3 / 2];
if (ImageBufferHandle != IntPtr.Zero)
{
Marshal.FreeHGlobal(ImageBufferHandle);
}
ImageBufferHandle = Marshal.AllocHGlobal(Marshal.SizeOf(buffer[0]) * width * height * 3 / 2);
SourcePicture = sourcePicture;
SourcePicture.Stride = Marshal.AllocHGlobal(Marshal.SizeOf((int)0) * 4);
var imageStrides = new int[4];
imageStrides[0] = sourcePicture.PicWidth;
imageStrides[1] = imageStrides[2] = sourcePicture.PicWidth >> 1;
Marshal.Copy(imageStrides, 0, SourcePicture.Stride, 4);
SourcePicture.Data = Marshal.AllocHGlobal(Marshal.SizeOf(IntPtr.Zero) * 4);
var imageData = new IntPtr[4];
imageData[0] = ImageBufferHandle;
imageData[1] = imageData[0] + width * height;
imageData[2] = imageData[1] + (width * height >> 2);
Marshal.Copy(imageData, 0, SourcePicture.Data, 4);
return;
}
private void FreeSourcePicture(SourcePicture picture)
{
try
{
if (picture.Stride != IntPtr.Zero)
{
Marshal.FreeHGlobal(SourcePicture.Stride);
}
if (picture.Stride != IntPtr.Zero)
{
Marshal.FreeHGlobal(SourcePicture.Data);
}
}
catch (Exception)
{
}
}
private static extern int EncodeFrame(IntPtr encoder, ref SourcePicture SourcePicture, ref FrameBitstreamInfo FrameInfo);