The MP4 libraries turn out to be the easiest place to hand a game Sony's own
code: libmp4.prx needs only sceAudiocodecInit and sceAudiocodecDecode from us
plus ordinary kernel calls, and mp4msv.prx - where the 41 functions libmp4
leans on live - imports nothing at all. So with a firmware dump present the
pair can be loaded for real and left to decode through our sceAudiocodec.
Adds DisableHLEFlags::sceMp4, which loads and starts both modules when the
game asks sceUtility for the MP4 module, and a --disable-hle bitmask so a
headless run can ask for this without a config file.
Two things had to be fixed to make it work at all:
- ModuleMgrForUser 0xD2FBC957 was unimplemented, and libmp4 calls it to get
the gp of each callback it is handed. Implemented as
sceKernelGetModuleGPByAddress.
- Headless forced every module to HLE unconditionally, which silently undid
the flag, and it did so before ApplyToConfig() had even parsed it.
Tested with Speedball 2 - Evolution, which uses sceMp4 for its music: the game
goes from 255645 calls into our stubs and 39 unresolved imports, to zero of
each and 1943 AAC frames decoded through sceAudiocodec.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
A call through a still-pending import gets written as a generic "invalid
syscall" opcode (WriteFuncMissingStub) that no longer carries the
original module name or NID by the time it's actually invoked - but the
address of the syscall instruction itself is exactly the stubAddr every
pending FuncSymbolImport already records. Added
KernelFindImportByStubAddr() to search loaded modules' importedFuncs for
a match, and use it in GetSyscallFuncPointer's unknown-syscall path.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Testing has shown that this seems to work great and fixes issues. These
two modules are just a parser and a shim over sceMpeg, and we're better
off running the original code, instead of re-implementing it.
sceMpeg still needs accuracy improvements though, and it's built on some
pretty low level components so it will be harder to peel off the next
level of the HLE onion.
Se #20200.
Some games survive with a loaded sceAtrac, and start talking to
sceAudioCodec instead, the underlying library, though unsuccessfully
since it's not properly implemented yet.
Fixes#19935. Forgot to update the formatting for the reporting case.
I'll clean this up in a more general way later, I don't like how this code currently looks.
