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Aica: fix adpcm decoding 

Fix click at the end of some samples (Sonic Adventure menu sound)
This commit is contained in:
Flyinghead 2019-03-26 12:45:02 +01:00
parent cce5028ed3
commit f5c896121e
1 changed files with 4 additions and 1 deletions
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5
core/hw/aica/sgc_if.cpp
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@ -751,7 +751,10 @@ __forceinline SampleType DecodeADPCM(u32 sample,s32 prev,s32& quant)
u32 data=sample&7;
/*(1 - 2 * L4) * (L3 + L2/2 +L1/4 + 1/8) * quantized width (ƒΆn) + decode value (Xn - 1) */
SampleType rv = prev + sign*((quant*adpcm_scale[data])>>3);
SampleType rv = (quant * adpcm_scale[data]) >> 3;
if (rv > 0x7FFF)
rv = 0x7FFF;
rv = sign * rv + prev;
quant = (quant * adpcm_qs[data])>>8;