unsafe static extern CMSampleBufferError CMSampleBufferCallForEachSample ( /* CMSampleBufferRef */ IntPtr sbuf, CMSampleBufferCallForEachSampleCallback callback, /* void* */ IntPtr refcon);
unsafe static extern CMSampleBufferError CMSampleBufferCallForEachSample( /* CMSampleBufferRef */ IntPtr sbuf, CMSampleBufferCallForEachSampleCallback callback, /* void* */ IntPtr refcon);