AnyPS5/docs/dev/debt/libSceAcm.md

libSceAcm technical debt

Silent stubs

• libSceAcm batches execute as silent no-ops, and do not execute encoded panner, FFT, reverb and priority commands (the priority job layout and checks are read from libSceAcm.sprx, firmware 13.40, not measured on a console).

Unknown function info

• Additional ACM exports - the eleven name/NID pairs below are defined exports in the firmware 13.60 inventory. Their ABIs and behaviour are unknown. Parameterless int declarations are import-resolution placeholders, not established signatures; every call throws NotImplemented_nid_no_patch. No audio-chain, reverb or telemetry behaviour is implemented.

Name	NID
sceAcmChain_Audio3dPO1_Clear	+o6KUwnCB+0
sceAcmChain_Audio3dPO1_RenderObject	0P2PH7lou4g
sceAcmChain_Audio3dPO1_Activate	5pi7bGbV7JM
sceAcmChain_Audio3dPO1_Output	7EGMt3d6RAk
sceAcm_ConvReverb_SharedIr_2	PVx9oQUaDdk
sceAcmChain_Audio3dPO1_RenderAmbisonicsChannel	ZViifnXeAUc
sceAcmChain_Audio3dPO2_Activate	aUfAPcEySHU
sceAcmChain_Audio3dPO1_RenderPassthroughObject	eU9FRHNi+xU
sceAcmChain_Audio3dPO2_RenderDelay	p23f04CznHs
sceAcmGetTelemetry	vQb-lO9SzEI
sceAcm_ConvReverb_SharedInput_2	wM41Cc+ieog

• libSceAcm context creation, batch submission and waiting use host identifiers instead of the native device and ioctl requests. Batch identifiers, timeout handling, DSP scheduling and service-side errors remain unimplemented. Panner source parameter and matrix payloads are forwarded by the native library; their DSP interpretation remains unverified.

• sceAcm_ConvReverb_SharedIr (libSceAcm) - its name and NID are in the PS5 3.20 export inventory, but no credible prototype was found. It is declared without parameters solely to resolve known imports; this is not an ABI claim

• sceAcm_FFT and sceAcm_IFFT encode their jobs as libSceAcm.sprx does on firmware 13.40, where both exports call one encoder with a direction flag (read from the module's code and compared with that code run on x86-64, not measured on a console). PPSA14632 imports sceAcm_FFT; no known title imports sceAcm_IFFT. The DSP meaning of the job words is unverified.

• sceAcmBatchJobNotification is a parameterless pending declaration for import resolution. Its signature and behavior are unverified; it throws through NotImplemented_nid_no_patch.

• sceAcm_ConvReverb_SharedInput encodes the reverb jobs as libSceAcm.sprx does on firmware 13.40 (read from the module's code and compared with that code run on x86-64, not measured on a console). PPSA01317 calls it during boot with 512-sample blocks. Its input stage appends one sceAcm_FFT job of twice the block size (256 points for 128-sample blocks). The meaning of the reverb descriptor's block metadata for the DSP is unverified.

Additional callable exports

• Additional callable exports - 5 entries present in both version-labelled images are import-resolution declarations only. Neither label independently authenticates retail firmware provenance. Parameter lists, return types and behavior are unverified; parameterless int declarations are placeholders, not verified ABI contracts. Every entry throws through NotImplemented_nid_no_patch. Unidentified names use literal NID aliases. No runtime functionality is implemented. Data exports require separate layout and ownership analysis. Identified candidate names match their NIDs in the public symbol database or supplemental catalog.

Name	NID
Unknown	9+f3tPdeyP0
Unknown	DvsnlQr4yyk
Unknown	PLNywpi1zR4
Unknown	YpYvibqaqz0
Unknown	ngDRON91+-Y