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Fix the voice LPF implementation

This commit is contained in:
Pierre Bourdon 2013-01-20 17:20:30 +01:00
parent c662901504
commit 7252becf24
2 changed files with 4 additions and 4 deletions
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4
Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AXStructs.h
View File

@ -231,8 +231,8 @@ struct PBLowPassFilter
{
u16 enabled;
s16 yn1;
s16 a0;
s16 b0;
u16 a0;
u16 b0;
};
struct AXPB

4
Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX_Voice.h
View File

@ -342,10 +342,10 @@ void MixAdd(int* out, const s16* input, u32 count, u16* pvol, s16* dpop, bool ra
// Execute a low pass filter on the samples using one history value. Returns
// the new history value.
s16 LowPassFilter(s16* samples, u32 count, s16 yn1, s16 a0, s16 b0)
s16 LowPassFilter(s16* samples, u32 count, s16 yn1, u16 a0, u16 b0)
{
for (u32 i = 0; i < count; ++i)
yn1 = samples[i] = (s32)a0 * samples[i] - (s32)b0 * yn1;
yn1 = samples[i] = (a0 * (s32)samples[i] + b0 * (s32)yn1) >> 15;
return yn1;
}