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SPU2: Implement inverse phase slide mode

This commit is contained in:
Ziemas 2023-10-12 06:51:44 +02:00 committed by refractionpcsx2
parent 509613d2e5
commit f8e8bd03cd
1 changed files with 16 additions and 3 deletions
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19
pcsx2/SPU2/ADSR.cpp
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@ -60,7 +60,7 @@ bool V_ADSR::Calculate(int voiceidx)
// maybe not correct for the "infinite" settings
u32 counter_inc = 0x8000 >> std::max(0, p.Shift - 11);
s16 level_inc = (s16)(p.Step << std::max(0, 11 - p.Shift));
s32 level_inc = p.Step << std::max(0, 11 - p.Shift);
if (p.Exp)
{
@ -143,7 +143,7 @@ void V_VolumeSlide::Update()
}
u32 counter_inc = 0x8000 >> std::max(0, Shift - 11);
s16 level_inc = (s16)(step_size << std::max(0, 11 - Shift));
s32 level_inc = step_size << std::max(0, 11 - Shift);
if (Exp)
{
@ -161,9 +161,22 @@ void V_VolumeSlide::Update()
counter_inc = std::max<u32>(1, counter_inc);
Counter += counter_inc;
// If negative phase "increase" to -0x8000 or "decrease" towards 0
level_inc = Phase ? -level_inc : level_inc;
if (Counter >= 0x8000)
{
Counter = 0;
Value = std::clamp<s32>(Value + level_inc, 0, INT16_MAX);
if (!Decr)
{
Value = std::clamp<s32>(Value + level_inc, INT16_MIN, INT16_MAX);
}
else
{
s32 low = Phase ? INT16_MIN : 0;
s32 high = Phase ? 0 : INT16_MAX;
Value = std::clamp<s32>(Value + level_inc, low, high);
}
}
}