test(libSceAudioOut): define TestEnableChat; drop stale EnableChat unknown-signature line

Co-Authored-By: Claude <noreply@anthropic.com>

core/libs/prx/libSceAudioOut/tests/AudioOut2Latency.cpp

@@ -61,6 +61,11 @@ void TestMasteringSetParam() {
     Require(ThrowsRuntimeError([] { sceAudioOut2MasteringSetParam(nullptr, 0, 0); }), "null mastering parameters must throw");
 }
 
+void TestEnableChat() {
+    Require(sceAudioOut2EnableChat() == 0, "enabling chat must be accepted");
+    Require(sceAudioOut2EnableChat() == 0, "enabling chat again must be accepted");
+}
+
 }
 
 int main() {

docs/dev/debt/libSceAudioOut.md

@@ -3,7 +3,6 @@
 ### Unknown function info
 
 - [sceAudioOut2UserGetSupportedAttributes](../../../core/libs/prx/libSceAudioOut/src/AudioOut2User.cpp) (libSceAudioOut) - the user handle and two uint32 output pointers follow [SharpProspero](https://github.com/SvenGDK/SharpProspero/blob/5dfdb4b0b166e83dc9ae275001afb695f12c7174/src/SharpProspero/Interop/Audio/AudioOut2.cs) and [KytyPS5](https://github.com/KytyPS5/KytyPS5/blob/df5b9b92be7dfd463b47756b707d6d356a9f0550/src/libs/libAudio2.cpp), not a console measurement. The masks describe this runtime: no context attributes and port attributes PCM (bit 0) and gain (bit 1). Null outputs and unknown or destroyed user handles throw; console validation order and error values are unknown. Users are tracked for this query, but port ownership and busy-user destruction are not implemented. The other PPSA23566 imports remain declared without parameters, with unknown signatures: [sceConvertKeycodeGetCharacterFromKeyboardData](../../../core/libs/prx/libSceConvertKeycode/Export.cpp), [sce::Json::MemAllocator::notifyError](../../../core/libs/prx/libSceJson2/Export.cpp), [sceNpCommerceDialogOpen2](../../../core/libs/prx/libSceNpCommerce/Export.cpp), [sceProprietaryVoiceChatHelper{Initialize,Terminate,SetVoiceChatState,GetVoiceChatUsageState}](../../../core/libs/prx/libSceProprietaryVoiceChatHelperPrx/Export.cpp), [sceVoice{GetResourceInfo,ResetPort,EnableChat,DisableChat}](../../../core/libs/prx/libSceVoice/Export.cpp). Names from the shadPS4 aerolib NID list
-- PPSA28416 imports declared without parameters, signatures unknown: [sceAudioOut2EnableChat](../../../core/libs/prx/libSceAudioOut/src/AudioOut2System.cpp), imported by its bundled `party-ps5-shipping.prx`. Name from the shadPS4 aerolib NID list
 - [sceAudioOutExClose, sceAudioOutExConfigureOutput, sceAudioOutExOpen](../../../core/libs/prx/libSceAudioOut/src/AudioOut.cpp) (libSceAudioOut) - imported by PPSA99505, which fails to load without them; added without an implementation and declared without parameters. PPSA99505 calls them only for its HDMI bitstream output, an option that is off by default, to read the formats the TV or receiver lists, switch the HDMI output mode and open a port for IEC 61937 bursts ([Jelly5](https://github.com/02dnot/Jelly5/blob/552b866d89b2a58b27f7f7b0484dc743ce235526/app/src/jelly5_bitstream.cpp#L110-L179)); [EVO-PLAYER-PS5](https://github.com/sainsaji/EVO-PLAYER-PS5/blob/da0c0451333bab82e79fffd2de4718e917f9dcb0/projects/evoplayer/core/src/audio/evo_pt.cpp) also calls `sceAudioOutExOpen`, `sceAudioOutExConfigureOutput` and `sceAudioOutExClose` for HDMI bitstream output. The two declare the arguments of `sceAudioOutExConfigureOutput` differently and neither is confirmed on a console. Audio reaches the host device through SDL as PCM, so there is no encoded HDMI output to switch to
 - [sceAudioOutExGetMonitorInfo](../../../core/libs/prx/libSceAudioOut/src/AudioOut.cpp) (libSceAudioOut) reports a sink without audio descriptors: it zeroes the buffer and returns 0, as `sceAudioOutSysGetHdmiMonitorInfo` does, since audio reaches the host through SDL as PCM and there is no EDID to describe. The arguments `(0, 0, info, size)` and the descriptor count as a 32-bit value at +0x98, with 8-byte descriptors from +0xA0, follow [Jelly5](https://github.com/02dnot/Jelly5/blob/552b866d89b2a58b27f7f7b0484dc743ce235526/app/src/jelly5_bitstream.cpp#L62-L117) (PPSA99505), which passes a 0x400-byte buffer and read that layout from one TV; with no descriptor listed it decodes the audio itself instead of opening a bitstream port. The meaning of the first two arguments and the structure's size are unknown: nonzero first or second arguments and sizes below 0xA0, which cannot hold the count, throw, and every byte of the declared size is written as 0. A null buffer returns `0x80260004` like the other AudioOut calls; the console's code is not measured
 - [sceAudioOut2Set3DLatency](../../../core/libs/prx/libSceAudioOut/src/AudioOut2System.cpp) (libSceAudioOut) - assumed to take `(user_id, latency)`: KytyPS5 reads `(user_id, output, latency_us)`, but the known calls set just edi and esi; only `(0xFF, 2)` (PPSA26344) and `(0xFF, 1)` (PPSA14632) are accepted