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[Pad] Approximate trigger vibration on XInput (#140)

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Co-authored-by: Dafenx <196083014+Dafenxz0@users.noreply.github.com>
This commit is contained in:
Dafenx
2026-07-14 17:02:20 +02:00
committed by GitHub
parent 61a97baf85
commit ddc452b4fc
2 changed files with 65 additions and 2 deletions
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src/SharpEmu.Libs/Pad/PadExports.cs
+34
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@@ -192,9 +192,43 @@ public static class PadExports
LibraryName = "libScePad")]
public static int PadSetTriggerEffect(CpuContext ctx)
{
var handle = unchecked((int)ctx[CpuRegister.Rdi]);
var parameterAddress = ctx[CpuRegister.Rsi];
if (handle != PrimaryPadHandle)
{
return ctx.SetReturn(OrbisPadErrorInvalidHandle);
}
if (parameterAddress == 0)
{
return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
}
Span<byte> parameter = stackalloc byte[120];
if (!ctx.Memory.TryRead(parameterAddress, parameter))
{
return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
}
var triggerMask = parameter[0];
XInputReader.SetTriggerRumble(
(triggerMask & 0x01) != 0 ? DecodeTriggerVibration(parameter[8..64]) : null,
(triggerMask & 0x02) != 0 ? DecodeTriggerVibration(parameter[64..120]) : null);
return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_OK);
}
private static byte DecodeTriggerVibration(ReadOnlySpan<byte> command)
{
var mode = BinaryPrimitives.ReadUInt32LittleEndian(command);
var amplitude = mode switch
{
3 when command[10] != 0 => command[9],
6 when command[8] != 0 => command[9..19].ToArray().Max(),
_ => (byte)0,
};
return (byte)(Math.Min(amplitude, (byte)8) * 255 / 8);
}
[SysAbiExport(
Nid = "yFVnOdGxvZY",
ExportName = "scePadSetVibration",