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cellMic: Fix CELLMIC_DEVATTR_CHANVOL handling

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The microphone index given in `arg1` is 1-indexed, so we have to
subtract 1 from the index to access the proper value.

This wasn't caught up before since we were doing direct access of the
array instead of using `::at32` which wouldn't check that the value is
within bounds.

This allows the original SingStar game to boot up again, as it would
otherwise crash then trying to set the volume to the second channel due
to the index being out of bounds.
This commit is contained in:
Daniel López Guimaraes 2024-07-26 13:27:56 +01:00 committed by Megamouse
parent c8ad075372
commit ba3d16b48b
1 changed files with 4 additions and 4 deletions
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8
rpcs3/Emu/Cell/Modules/cellMic.cpp
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@ -863,9 +863,9 @@ error_code cellMicGetDeviceAttr(s32 dev_num, CellMicDeviceAttr deviceAttributes,
switch (deviceAttributes)
{
case CELLMIC_DEVATTR_CHANVOL:
if (*arg1 > 2 || !arg2)
if (*arg1 == 0 || *arg1 > 2 || !arg2)
return CELL_MICIN_ERROR_PARAM;
*arg2 = ::at32(device.attr_chanvol, *arg1);
*arg2 = ::at32(device.attr_chanvol, *arg1 - 1);
break;
case CELLMIC_DEVATTR_LED: *arg1 = device.attr_led; break;
case CELLMIC_DEVATTR_GAIN: *arg1 = device.attr_gain; break;
@ -897,9 +897,9 @@ error_code cellMicSetDeviceAttr(s32 dev_num, CellMicDeviceAttr deviceAttributes,
{
case CELLMIC_DEVATTR_CHANVOL:
// Used by SingStar to set the volume of each mic
if (arg1 > 2)
if (arg1 == 0 || arg1 > 2)
return CELL_MICIN_ERROR_PARAM;
::at32(device.attr_chanvol, arg1) = arg2;
::at32(device.attr_chanvol, arg1 - 1) = arg2;
break;
case CELLMIC_DEVATTR_LED: device.attr_led = arg1; break;
case CELLMIC_DEVATTR_GAIN: device.attr_gain = arg1; break;