POLLRDNORM        289 libavcodec/v4l2_context.c         .events =  POLLIN | POLLRDNORM | POLLPRI | POLLOUT | POLLWRNORM, /* default blocking capture */
POLLRDNORM        328 libavcodec/v4l2_context.c             pfd.events =  POLLIN | POLLRDNORM | POLLPRI;
POLLRDNORM        373 libavcodec/v4l2_context.c     if (pfd.revents & (POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM)) {
POLLRDNORM        377 libavcodec/v4l2_context.c             if (pfd.revents & (POLLIN | POLLRDNORM))