// Constructor from external pixel buffer
public Bgra32VideoFrame(int width, int height, _BMDFrameFlags flags, IntPtr byteArray)
{
m_width = width;
m_height = height;
m_flags = flags;
// Make reference to buffer
m_pixelBuffer = byteArray;
}
// Constructor generates empty pixel buffer
public Bgra32VideoFrame(int width, int height, _BMDFrameFlags flags)
{
m_width = width;
m_height = height;
m_flags = flags;
m_pixelBufferBytes = m_width * m_height * 4;
// Allocate pixel buffer from unmanaged memory
m_unmanagedBuffer = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(m_pixelBufferBytes);
m_pixelBuffer = m_unmanagedBuffer;
// Inform runtime of large unmanaged memory allocation for scheduling garbage collection
System.GC.AddMemoryPressure(m_pixelBufferBytes);
}
