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add 4 bit pcm depth

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This commit is contained in:
Eknous-P 2025-05-27 17:21:26 +04:00
parent 3032e78a47
commit bcf4f5f508
3 changed files with 42 additions and 2 deletions
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36
src/engine/sample.cpp
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@ -291,6 +291,8 @@ int DivSample::getSampleOffset(int offset, int length, DivSampleDepth depth) {
case DIV_SAMPLE_DEPTH_16BIT:
off=offset*2;
break;
case DIV_SAMPLE_DEPTH_4BIT:
off=(offset+1)/2;
default:
break;
}
@ -355,6 +357,10 @@ int DivSample::getSampleOffset(int offset, int length, DivSampleDepth depth) {
off=((offset*3)+1)/2;
len=((length*3)+1)/2;
break;
case DIV_SAMPLE_DEPTH_4BIT:
off=(offset+1)/2;
len=(length+1)/2;
break;
case DIV_SAMPLE_DEPTH_16BIT:
off=offset*2;
len=length*2;
@ -419,6 +425,9 @@ int DivSample::getEndPosition(DivSampleDepth depth) {
case DIV_SAMPLE_DEPTH_12BIT:
off=length12;
break;
case DIV_SAMPLE_DEPTH_4BIT:
off=length4;
break;
case DIV_SAMPLE_DEPTH_16BIT:
off=length16;
break;
@ -622,6 +631,12 @@ bool DivSample::initInternal(DivSampleDepth d, int count) {
data12=new unsigned char[length12+8];
memset(data12,0,length12+8);
break;
case DIV_SAMPLE_DEPTH_4BIT:
if (data4!=NULL) delete[] data4;
length4=count;
data4=new unsigned char[length4];
memset(data4,0,length4);
break;
case DIV_SAMPLE_DEPTH_16BIT: // 16-bit
if (data16!=NULL) delete[] data16;
length16=count*2;
@ -860,6 +875,8 @@ void DivSample::convert(DivSampleDepth newDepth, unsigned int formatMask) {
case DIV_SAMPLE_DEPTH_VOX: // VOX
setSampleCount((samples+1)&(~1));
break;
case DIV_SAMPLE_DEPTH_4BIT:
setSampleCount((samples+1)&(~1));
default:
break;
}
@ -1317,6 +1334,11 @@ void DivSample::render(unsigned int formatMask) {
}
}
break;
case DIV_SAMPLE_DEPTH_4BIT:
for (unsigned int i=0; i<samples; i++) {
data16[i]=data4[i]<<12;
}
break;
default:
return;
}
@ -1518,6 +1540,15 @@ void DivSample::render(unsigned int formatMask) {
}
}
}
if (NOT_IN_FORMAT(DIV_SAMPLE_DEPTH_4BIT)) {
if (!initInternal(DIV_SAMPLE_DEPTH_4BIT,samples)) return;
for (unsigned int i=0; i<samples; i++) {
data4[i]=(data16[i]>>12)&0xf;
// if (i+1<samples) {
// data4[i/2]|=(data16[i+1]>>12);
// }
}
}
}
void* DivSample::getCurBuf() {
@ -1550,6 +1581,8 @@ void* DivSample::getCurBuf() {
return dataIMA;
case DIV_SAMPLE_DEPTH_12BIT:
return data12;
case DIV_SAMPLE_DEPTH_4BIT:
return data4;
case DIV_SAMPLE_DEPTH_16BIT:
return data16;
default:
@ -1588,6 +1621,8 @@ unsigned int DivSample::getCurBufLen() {
return lengthIMA;
case DIV_SAMPLE_DEPTH_12BIT:
return length12;
case DIV_SAMPLE_DEPTH_4BIT:
return length4;
case DIV_SAMPLE_DEPTH_16BIT:
return length16;
default:
@ -1703,4 +1738,5 @@ DivSample::~DivSample() {
if (dataC219) delete[] dataC219;
if (dataIMA) delete[] dataIMA;
if (data12) delete[] data12;
if (data4) delete[] data4;
}