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18 lines
5.0 KiB
Markdown
18 lines
5.0 KiB
Markdown
# libSceVoiceQoS technical debt
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### Silent stubs
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- [sceVoiceQoSReadPacket](../../../core/libs/prx/libSceVoiceQoS/Export.cpp) (libSceVoiceQoS) - network voice packet streaming is not implemented: it returns 0 and writes size 0 (indicating no packet is available). Aliens: Fireteam Elite (PPSA03393) calls it on its startup path (`0x76D14C`-`0x76D16E`) and stops with `not implemented` if it throws
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- [sceVoiceQoSWritePacket](../../../core/libs/prx/libSceVoiceQoS/Export.cpp) (libSceVoiceQoS) - network voice packet streaming is not implemented: it returns 0 leaving `*size` untouched (treating all input bytes as accepted). Aliens: Fireteam Elite (PPSA03393) sets `*size` to the packet size before `WritePacket` (`0x76CEB9`-`0x76CEC4`), compares `*size` against that input size upon return (`0x76CF07`-`0x76CF10`) to verify all bytes were accepted, and stops with `not implemented` if it throws
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### Unknown function info
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- [sceVoiceQoSSetConnectionAttribute](../../../core/libs/prx/libSceVoiceQoS/Export.cpp) (libSceVoiceQoS, NID `KCGOxg8iX7s`) is a throwing stub declared without parameters, like the other endpoint calls of the library: PPSA04159 fails to load without it and its signature is unknown. The name hashes to the imported NID (`tools/nid_names.py`)
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- [sceVoiceQoSInit](../../../core/libs/prx/libSceVoiceQoS/Export.cpp) (libSceVoiceQoS) - `0x804E0905` for a second initialization comes from [prosper](https://github.com/mattias800/prosper)'s reading of the module and was not measured: on a PS5 a valid call blocks inside a homebrew payload, so it never returns there. PPSA26344's two call sites (`0xE307BF`, `0x151C45D`) pass an allocated pointer, a 0x40000-byte block and app type 0x10000000; the app type and block are not used. `sceVoiceQoSCreateLocalEndpoint` takes four arguments (`int* id, userId, deviceInId, deviceOutId`) as declared in fpPS4 (`src/ps4_libscevoice.pas`, `ps4_sceVoiceQoSCreateLocalEndpoint`); signatures for `DeleteLocalEndpoint(id)`, `CreateRemoteEndpoint(int* id)`, `DeleteRemoteEndpoint(id)`, `Connect(int* id, local, remote)`, `Disconnect(connection)`, `SetLocalEndpointAttribute(id, attribute, value, size)`, `SetRemoteEndpointAttribute(id, attribute, value, size)`, and `GetLocalEndpointAttribute(id, attribute, value, size)` were verified against call sites in Aliens: Fireteam Elite (PPSA03393, e.g. `0x76D132`, `0x76D16E`, `0x76CECB`). Endpoints and connections are tracked by allocated id; duplicate connections and deleting an endpoint while referenced in a connection are permitted as the console is not known to reject them; endpoint attributes are stored as given (including empty or non-positive sizes), as their ids and defaults are unknown. The not-initialized error 0x804E0901 is assumed from the 0x804E09xx numbering, and unknown ids return `ARGUMENT_INVALID`. Aliens: Fireteam Elite (PPSA03393) uses all implemented calls on its load path; it stops with `not implemented` when any unimplemented call throws
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- [libSceVoiceQoS firmware exports](../../../core/libs/prx/libSceVoiceQoS/Export.cpp) (libSceVoiceQoS) - `sceVoiceQoSGetRemoteEndpointAttribute`, `sceVoiceQoSGetConnectionAttribute` and `sceVoiceQoSGetStatus` follow public PS4 SDK prototypes in [Orbital](https://github.com/AlexAltea/orbital/blob/b321fcdbd700cc02da1cb1ad25412781d5ec73c6/tools/ida/db_types.json#L2436-L2441) and remain throwing stubs as endpoint and connection attribute storage is unverified on hardware. `sceVoiceQoSEnableChat`, `sceVoiceQoSDisableChat`, `sceVoiceQoSDebugGetStatus`, `sceVoiceQoSInitHQ`, `sceVoiceQoSSetMode`, and `sceVoiceQoSTerminate` are declared without parameters from the firmware export database (aerolib.csv); their guest signatures are unverified on hardware and every call throws
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### Functional
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- [sceVoiceQoSEnd](../../../core/libs/prx/libSceVoiceQoS/Export.cpp) (libSceVoiceQoS) - `0x804E0901` (not initialized) before any initialization was measured on a PS5 (firmware 13.60, #1407); ending an initialized library was not, because a valid `sceVoiceQoSInit` never returns inside a homebrew payload. PPSA14632 calls it at shutdown and PPSA26344 after a nonzero `sceVoiceQoSInit`. After an initialization it returns 0 and clears the init flag, so the library can be initialized again. Whether the console also ends the libSceVoice instance that its `sceVoiceQoSInit` starts ([prosper](https://github.com/mattias800/prosper)'s reading of the module), and what it answers while endpoints exist, is unknown; here it drops every endpoint and connection
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- [sceVoiceQoSGetLocalEndpoint, sceVoiceQoSGetRemoteEndpoint](../../../core/libs/prx/libSceVoiceQoS/Export.cpp) (libSceVoiceQoS) - signatures follow [Orbital](https://github.com/AlexAltea/orbital/blob/b321fcdbd700cc02da1cb1ad25412781d5ec73c6/tools/ida/db_types.json#L2437-L2439) (`GetLocalEndpoint(connectionId, int* localId)` and `GetRemoteEndpoint(connectionId, int* remoteId)`). Operations look up the connection by allocated id and return the connected local or remote endpoint id; an unknown connection id or null output pointer returns `ARGUMENT_INVALID` (0x804E0902), and calling before initialization returns `0x804E0901`
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