Codes are available for both the Panasonic & Samsung DVD players. My guess is the codes for BluRay players are the same as for regular DVD. IMO, actual remote for DVD player is better to use than a universal remote, unless you are using Harmony, Pronto, or Universal programmable remotes.
NO, the blu-ray players do not use the same codeset has the regular dvd players. And so there isn't a working code for many blu-ray players in the directv remotes.