Blackout from codeine?

That’s enough for alcohol alone. Opioids and alcohol additionally strengthen each other in their centrally damping effects. This combination is considered highly dangerous. You can be glad that it was just a film crack and not a deadly breathing depression.

The PsychonautWiki releases the following warning for this combination:

Both substances strengthen the ataxy and sedation caused by the other and can lead to unexpected loss of consciousness at high doses. Bring affected patients into stable side positions to prevent aspiration of vomiting by excessive vomiting. Film cracks are likely.

— https://psychonautwiki.org/wiki/Codeine

You can find many general information about the possible effects and side effects as well as the risks associated with consumption here: https://drugscouts.de/lexikon/alcohol