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

• Unnamed firmware 13.42 exports - 44 function NIDs that firmware 13.42's system/common/lib/libSceAcm.sprx exports (read from its export table) are import-resolution declarations only. The firmware 13.60 inventory lists the same NIDs as defined function exports with no name, and none is in the public symbol database. Names, parameter lists, return types and behavior are unknown; parameterless int declarations are placeholders, not verified ABI contracts, and every entry throws through NotImplemented_nid_no_patch.

Name	NID
Unknown	+GEfQURRfNQ
Unknown	+v8StWu8ce0
Unknown	05vZ-d35iOU
Unknown	29f5DNJTpME
Unknown	2IuXRVnP+E4
Unknown	3odf3m8-sTA
Unknown	3ukt3-zPLo4
Unknown	3v8OJlWuVoI
Unknown	7aoLbYKdti0
Unknown	ADVHzAQRzvI
Unknown	BKv16PL+en4
Unknown	FcV33YZNrZY
Unknown	HRzaZ03MB4c
Unknown	Jd95if4IDsc
Unknown	KUQB9006te4
Unknown	KeUzwnv2znk
Unknown	LOAWrRdCsuI
Unknown	NLMqc049bmY
Unknown	Nir1S45p+k0
Unknown	OXsTjBOwUcs
Unknown	QGrI0Du9IYs
Unknown	RJGnXst7vUQ
Unknown	RbJwbKtBy48
Unknown	S+W03U2x0VU
Unknown	UK03t9UoOWU
Unknown	UnPujhtY1e4
Unknown	VG31URxchBE
Unknown	Zea6TpIIcuw
Unknown	cMDARlsd0IU
Unknown	cQlAR2dYW1U
Unknown	dLDAIKe6QPI
Unknown	l2XvCIV50-Q
Unknown	lbezsUkPojs
Unknown	mXntN6cqsj4
Unknown	n4spvEiudjI
Unknown	ozmQIEUnkNE
Unknown	p8H6QiaoXnY
Unknown	reqnnLJj9lo
Unknown	sAxJPDwmsBg
Unknown	sSI1ZHQh9as
Unknown	sYPAONMjsz4
Unknown	sn178+KL4FI
Unknown	vsxwtmT9mbY
Unknown	zzN06JMvPFc