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(PSX) Clamping

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This commit is contained in:
twinaphex 2013-11-08 06:58:46 +01:00
parent f6e4c0266c
commit 568d6f56c8
2 changed files with 12 additions and 15 deletions
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4
mednafen/clamp.h
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@ -24,6 +24,10 @@ static INLINE void clamp(int32_t *val, size_t, size_t)
*val = (*val >> 31) ^ 0x7FFF;
}
#define clamp_simple(val) \
if ( (int16_t)val != val ) \
val = (val >> 31) ^ 0x7FFF;
#ifdef WANT_PCFX_EMU
static INLINE void clamp(int64_t *val, size_t, size_t)
{

23
mednafen/psx/spu.cpp
View File

@ -309,11 +309,7 @@ void PS_SPU::DecodeADPCM(const uint8 *input, int16 *output, const unsigned shift
sample += ((output[i - 1] * Weights[weight][0]) >> 6) + ((output[i - 2] * Weights[weight][1]) >> 6);
if(sample < -32768)
sample = -32768;
if(sample > 32767)
sample = 32767;
clamp_simple(sample);
output[i] = sample;
}
@ -376,11 +372,8 @@ void PS_SPU::DecodeSamples(SPU_Voice *voice)
sample += ((voice->DecodeBuffer[(voice->DecodeWritePos - 1) & 0x1F] * Weights[weight][0]) >> 6)
+ ((voice->DecodeBuffer[(voice->DecodeWritePos - 2) & 0x1F] * Weights[weight][1]) >> 6);
if(sample < -32768)
sample = -32768;
if(sample > 32767)
sample = 32767;
clamp_simple(sample);
voice->DecodeBuffer[voice->DecodeWritePos] = sample;
voice->DecodeWritePos = (voice->DecodeWritePos + 1) & 0x1F;
@ -853,10 +846,10 @@ int32 PS_SPU::UpdateFromCDC(int32 clocks)
LFSR = (LFSR << 1) | (((LFSR >> 15) ^ (LFSR >> 12) ^ (LFSR >> 11) ^ (LFSR >> 10) ^ 1) & 1);
}
clamp(&accum_l, -32768, 32767);
clamp(&accum_r, -32768, 32767);
clamp(&accum_fv_l, -32768, 32767);
clamp(&accum_fv_r, -32768, 32767);
clamp_simple(accum_l);
clamp_simple(accum_r);
clamp_simple(accum_fv_l);
clamp_simple(accum_fv_r);
#if 0
accum_l = 0;
@ -876,8 +869,8 @@ int32 PS_SPU::UpdateFromCDC(int32 clocks)
//output_l = reverb_l;
//output_r = reverb_r;
clamp(&output_l, -32768, 32767);
clamp(&output_r, -32768, 32767);
clamp_simple(output_l);
clamp_simple(output_r);
assert(IntermediateBufferPos < 4096);
IntermediateBuffer[IntermediateBufferPos][0] = output_l;