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fix µ-law encoding

This commit is contained in:
tildearrow 2023-08-12 03:42:10 -05:00
parent 06243c9d9d
commit 320d965f78
2 changed files with 5 additions and 4 deletions
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2
src/engine/platform/c140.cpp
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@ -448,7 +448,7 @@ void DivPlatformC140::renderSamples(int sysID) {
} else {
if (s->depth==DIV_SAMPLE_DEPTH_MULAW) {
for (unsigned int i=0; i<length; i++) {
sampleMem[i+(memPos/sizeof(short))]=(s->dataMuLaw[i]<<8);
sampleMem[i+(memPos/sizeof(short))]=((s->dataMuLaw[i])<<8);
}
} else {
memcpy(sampleMem+(memPos/sizeof(short)),s->data16,length);

7
src/engine/sample.cpp
View File

@ -1266,10 +1266,11 @@ void DivSample::render(unsigned int formatMask) {
if (!initInternal(DIV_SAMPLE_DEPTH_MULAW,samples)) return;
for (unsigned int i=0; i<samples; i++) {
IntFloat s;
s.f=(float)-data16[i];
s.f/=32768.0f;
s.f=fabs(data16[i]);
s.f/=128.0f;
s.f+=1.0f;
s.i-=0x3f800000;
dataMuLaw[i]=(((s.i&0x80000000)>>24)|((s.i&0x03f80000)>>19))^0xff;
dataMuLaw[i]=(((data16[i]<0)?0x80:0)|(s.i&0x03f80000)>>19)^0xff;
}
}
}