Accept SCE_NGS2_CUSTOM_MODULE_ID_USER_FX (0x1d) on custom submixer racks alongside UserFx2 (0x1f). When configuring a custom rack voice, support voice control parameter SCE_NGS2_CUSTOM_VOICE_PARAM_USER_FX (0x40001d00) to install custom submixer UserFx callbacks with user data. Run legacy UserFx callbacks during custom voice rendering and update sample presence flags accordingly.
Fixes runtime abort in Void Terrarium (PPSA03061):
terminate called after throwing an instance of 'std::runtime_error'
what(): NGS2: custom module id 0x1d is not implemented
FATAL: abort() (SIGABRT)
Closes#5055
Dead Cells (PPSA15552) calls sceNgs2VoiceGetState on custom sampler
voices with a 48-byte buffer and reads the 64-bit value at offset 16 as
a running counter. Fill it with the decoded sample count, keep the
common state flags, and return INVALID_OUT_SIZE for other sizes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Dean