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desmume
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fix poppy interpolation audio quality bug

This commit is contained in:
zeromus 2011-08-23 22:23:47 +00:00
parent 4aff5bb444
commit 55122bb9fa
1 changed files with 2 additions and 3 deletions
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5
tools/vio2sf/src/vio2sf/desmume/SPU.cpp
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@ -521,13 +521,12 @@ extern "C" void SPU_WriteLong(u32 addr, u32 val)
}
//////////////////////////////////////////////////////////////////////////////
static FORCEINLINE s32 Interpolate(SPUInterpolationMode INTERPOLATE_MODE, s32 a, s32 b, double _ratio)
static FORCEINLINE s32 Interpolate(SPUInterpolationMode INTERPOLATE_MODE, s32 a, s32 b, double ratio)
{
float ratio = (float)_ratio;
if(INTERPOLATE_MODE == SPUInterpolation_Cosine)
{
//why did we change it away from the lookup table? somebody should research that
ratio = ratio - (int)ratio;
ratio = ratio - sputrunc(ratio);
double ratio2 = ((1.0 - cos(ratio * M_PI)) * 0.5);
//double ratio2 = (1.0f - cos_lut[((int)(ratio*256.0))&0xFF]) / 2.0f;
return (s32)(((1-ratio2)*a) + (ratio2*b));