A game that ships MPEG.PRX doesn't need a firmware installed to run the real
module - Death Jr. loads PSP_GAME/USRDIR/MODULES/MPEG.PRX itself - but the flag
came off anyway, because the decision has to be made before the game's imports
resolve and nothing had looked on the disc yet. So look: a bounded walk for a
file of that name, only when flash0 comes up empty, so the usual case pays
nothing.
The name is the easy part - about a quarter of discs ship one and it is called
mpeg.prx in every case seen - but the directory is not. MODULE and MODULES are
the common ones, with KMODULE, PRX, DATA/MODULE, and more at five levels deep,
hence the generous depth limit. Matching on the name rather than reading each
PRX to see what it exports means guessing wrong only costs us the real module.
sceMp4 is the other half of this. Our HLE of it is nearly all stubs, so dropping
the flag for want of firmware doesn't rescue anything - those libraries only
exist in firmware 6.00 and later, and without them MP4 playback simply isn't
available. Since almost nothing uses sceMp4, warning about that every boot would
be noise, so NotifyLoadStatusMp4 says it instead, which only something actually
asking for MP4 reaches.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
