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4 bit pcm: requseted changes

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This commit is contained in:
Eknous-P 2025-07-24 13:08:28 +04:00
parent 0426cf3a71
commit c9f3e95add
2 changed files with 5 additions and 4 deletions
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2
src/engine/fileOps/pps.cpp
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@ -93,7 +93,7 @@ void DivEngine::loadPPS(SafeReader& reader, std::vector<DivSample*>& ret, String
s->rate = PPS_SAMPLE_RATE;
s->centerRate = PPS_SAMPLE_RATE;
s->depth = DIV_SAMPLE_DEPTH_4BIT;
s->init(headers[i].sample_length*2); //byte per sample
s->init(headers[i].sample_length);
reader.seek((int)headers[i].start_pointer, SEEK_SET);

7
src/engine/sample.cpp
View file

@ -877,6 +877,7 @@ void DivSample::convert(DivSampleDepth newDepth, unsigned int formatMask) {
break;
case DIV_SAMPLE_DEPTH_4BIT:
setSampleCount((samples+1)&(~1));
break;
default:
break;
}
@ -1338,9 +1339,9 @@ void DivSample::render(unsigned int formatMask) {
unsigned short nibble=0;
for (unsigned int i=0; i<samples; i++) {
if (i&1) {
nibble=data4[i/2]&0xf;
nibble=data4[i>>1]&0xf;
} else {
nibble=data4[i/2]>>4;
nibble=data4[i>>1]>>4;
}
data16[i]=(nibble<<12)^0x8000;
}
@ -1558,7 +1559,7 @@ void DivSample::render(unsigned int formatMask) {
_sample=(*samplePtr++^0x8000)>>12;
sample4|=_sample;
}
data4[i/2]=sample4;
data4[i>>1]=sample4;
}
}
}