protected void ProcessFrameReceived(object sender, NDI.VideoFrameReceivedEventArgs e)
{
if (!_BufferAllocated)
{
if (_FourCC != e.Frame.FourCC)
{
string receivedFormatName = OutputFormat.FourCCToFormatName(e.Frame.FourCC);
if (receivedFormatName.Length == 0)
{
receivedFormatName = e.Frame.FourCC.ToString("X8");
}
_Log.Error($"Specified format {OutputFormat.Name} doesn't match NDI device format {receivedFormatName}");
}
_Log.Debug($"Creating video buffer {e.Frame.Width}x{e.Frame.Height} {OutputFormat.Name}");
AllocateBuffer(e.Frame.Width, e.Frame.Height);
}
else if (e.Frame.Width != _Buffer.Width || e.Frame.Height != _Buffer.Height)
{
_Log.Debug($"Video size changed to {e.Frame.Width}x{e.Frame.Height}");
if (e.Frame.Width * e.Frame.Height > _AllocatedPixels)
{
// Only reallocate if pixel count increased
_Buffer.Free();
_BufferAllocated = false;
_Log.Debug($"Re-creating video buffer");
AllocateBuffer(e.Frame.Width, e.Frame.Height);
}
else
{
_Buffer.Width = e.Frame.Width;
_Buffer.Height = e.Frame.Height;
_Buffer.Stride = e.Frame.Stride;
}
}
// Populate buffer with NDI frame data
Marshal.Copy(e.Frame.BufferPtr, _Buffer.DataBuffer.Data, 0, e.Frame.Height * e.Frame.Stride);
RaiseFrame(new VideoFrame(_Buffer));
}