const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
width = userdata->last_width[first_frame.field_number];
height = userdata->last_height[first_frame.field_number];
const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
width = userdata->last_width[first_frame.field_number];
height = userdata->last_height[first_frame.field_number];