we're not relying anymore on the file extension, so this information is useless for the player.

the refactoring introduced this error where we call report an EOF upon IMSG_STOP, making the player infinitely loop.

just a bit of "magic" :) Flac are easy, they always start with "fLaC". mp3 are weird because they either start with "ID3" (but this theoretically only ensures that's a tagged file, not an mp3) or 0xFF 0xFB. Ogg Opus should have a magic sequence "OpusHead" somewhere near the start of the file but also have the ogg' "OggS" magic bytes. I hope it's enough to distinguish between Ogg Opus and Vorbis. Another option would be to refactor play_oggvorbis/opus to not close the file on failure and try in cascade the play_* functions, but it's more complex and this solution seems to be enough.

let the caller decide to call senderr or sendeof.

* unbreak opus and ogg vorbis * handle flacs with bps != 16 and/or channels != 2 * speed up `load' a lot (especially if over NFS)