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4 bit pcm: requseted changes

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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->rate = PPS_SAMPLE_RATE;
s->centerRate = PPS_SAMPLE_RATE; s->centerRate = PPS_SAMPLE_RATE;
s->depth = DIV_SAMPLE_DEPTH_4BIT; 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); reader.seek((int)headers[i].start_pointer, SEEK_SET);

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