sco_rx_transfer_t
sco_rx_transfer_t* ctx = (sco_rx_transfer_t*)cookie;
size_t roomSize = sizeof(sco_rx_transfer_t) + dataSize;
sco_rx_transfer_t* ctx = (sco_rx_transfer_t*)alloc_room(&bdev->scoRoom, roomSize);
void* dataBuffer = (uint8*)ctx + sizeof(sco_rx_transfer_t);