AjmModuleUnregister/AjmFinalize were pure no-ops (always returned success
without touching state); they now validate the context and actually remove
the codec registration / context entry, returning a real error when the
context is unknown. AjmModuleUnregister traces whether the codec was
actually registered, to help spot a title unregistering something it never
registered.
MaxCodecType was hardcoded to 25 based on known Sony codec ids, incorrectly
rejecting valid Gen5 codec types (e.g. 24). Registration is pure bookkeeping
(HashSet.Add); the only real constraint is that codecType must not overflow
the 32-bit instanceId it gets packed into, i.e. codecType < 2^18. Named the
instanceId bit-packing constants (InstanceIdSlotBits/InstanceIdSlotMask) so
the four call sites that used to hardcode 14/0x3FFF independently can't
drift out of sync, and MaxCodecType's formula is self-evident.
Accept sceAcmBatchInitialize/InitializeLite/Start/StartMultiple/Process as
successful no-ops -- the emulator runs no ACM DSP jobs, but Scream's workers
trap on int 0x41/0x42 asserts whenever a submission call reports failure.
Accept sceAudioOut2MasteringInit/Set3DLatency as no-ops -- the host mixer
has no mastering/object pipeline to tune, but returning failure makes
titles tear down their whole ACM context and abort audio arena bring-up.
Tested on Ghost of Yotei (PPSA26344): sceAudioOut2MasteringInit/Set3DLatency
unresolved-import warnings go from 2 to 0, unblocking 5 audio-related guest
threads that never spawned before (MovieDecoder, snd_stream_parsing_thread,
snd_stream_reader_thread, Psn, NCA::PumpThread), watchdog stall errors from
1 to 0. This alone gets the title past its Scream audio-init stall into
further boot, but it still hits an unrelated infinite retry loop in
sceVideoOutGetFlipStatus shortly after -- fixed by the separate
videoout-agc-hle-misc change; combined, the title renders and presents a
real GPU frame.
Regression-checked on Demon's Souls, Astro Bot, Outer Wilds, Cult of the
Lamb, Ghost of Tsushima, GTA, Minecraft, Quake: 0 calls to any export
touched by this change on any of them, byte-for-byte identical to
upstream/main.
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