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Neo Geo: implement ADPCM-B

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This commit is contained in:
tildearrow 2022-02-25 00:11:27 -05:00
parent efd78a23c0
commit 35e459d9e5
4 changed files with 177 additions and 18 deletions
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29
src/engine/engine.cpp
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@ -460,12 +460,12 @@ void DivEngine::renderSamples() {
memPos=(memPos+0xfffff)&0xf00000;
}
if (memPos>=16777216) {
logW("out of ADPCM memory for sample %d!\n",i);
logW("out of ADPCM-A memory for sample %d!\n",i);
break;
}
if (memPos+paddedLen>=16777216) {
memcpy(adpcmAMem+memPos,s->dataA,16777216-memPos);
logW("out of ADPCM memory for sample %d!\n",i);
logW("out of ADPCM-A memory for sample %d!\n",i);
} else {
memcpy(adpcmAMem+memPos,s->dataA,paddedLen);
}
@ -474,6 +474,31 @@ void DivEngine::renderSamples() {
}
adpcmAMemLen=memPos+256;
// step 2: allocate ADPCM-B samples
if (adpcmBMem==NULL) adpcmBMem=new unsigned char[16777216];
memPos=0;
for (int i=0; i<song.sampleLen; i++) {
DivSample* s=song.sample[i];
int paddedLen=(s->lengthB+255)&(~0xff);
if ((memPos&0xf00000)!=((memPos+paddedLen)&0xf00000)) {
memPos=(memPos+0xfffff)&0xf00000;
}
if (memPos>=16777216) {
logW("out of ADPCM-B memory for sample %d!\n",i);
break;
}
if (memPos+paddedLen>=16777216) {
memcpy(adpcmBMem+memPos,s->dataB,16777216-memPos);
logW("out of ADPCM-B memory for sample %d!\n",i);
} else {
memcpy(adpcmBMem+memPos,s->dataB,paddedLen);
}
s->offB=memPos;
memPos+=paddedLen;
}
adpcmBMemLen=memPos+256;
// step 4: allocate qsound pcm samples
if (qsoundMem==NULL) qsoundMem=new unsigned char[16777216];