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SegaPCM: new real emulation core

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This commit is contained in:
tildearrow 2023-02-10 02:01:23 -05:00
parent 0d424c7962
commit 6036366f38
9 changed files with 144 additions and 169 deletions
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56
src/engine/vgmOps.cpp
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@ -1085,7 +1085,7 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
DivDispatch* writeADPCM_OPNA[2]={NULL,NULL};
DivDispatch* writeADPCM_OPNB[2]={NULL,NULL};
DivDispatch* writeADPCM_Y8950[2]={NULL,NULL};
int writeSegaPCM=0;
DivDispatch* writeSegaPCM[2]={NULL,NULL};
DivDispatch* writeX1010[2]={NULL,NULL};
DivDispatch* writeQSound[2]={NULL,NULL};
DivDispatch* writeES5506[2]={NULL,NULL};
@ -1177,12 +1177,12 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
hasSegaPCM=4000000;
CHIP_VOL(4,0.67);
willExport[i]=true;
writeSegaPCM=1;
writeSegaPCM[0]=disCont[i].dispatch;
} else if (!(hasSegaPCM&0x40000000)) {
isSecond[i]=true;
CHIP_VOL_SECOND(4,0.67);
willExport[i]=true;
writeSegaPCM=2;
writeSegaPCM[1]=disCont[i].dispatch;
hasSegaPCM|=0x40000000;
howManyChips++;
}
@ -1843,53 +1843,17 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
}
}
if (writeSegaPCM>0) {
unsigned char* pcmMem=new unsigned char[16777216];
size_t memPos=0;
for (int i=0; i<song.sampleLen; i++) {
DivSample* sample=song.sample[i];
unsigned int alignedSize=(sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)+0xff)&(~0xff);
if (alignedSize>65536) alignedSize=65536;
if ((memPos&0xff0000)!=((memPos+alignedSize)&0xff0000)) {
memPos=(memPos+0xffff)&0xff0000;
}
logV("- sample %d will be at %x with length %x",i,memPos,alignedSize);
if (memPos>=16777216) break;
sampleOffSegaPCM[i]=memPos;
unsigned int readPos=0;
for (unsigned int j=0; j<alignedSize; j++) {
if (readPos>=(unsigned int)sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)) {
if (sample->isLoopable()) {
readPos=sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
pcmMem[memPos++]=((unsigned char)sample->data8[readPos]+0x80);
} else {
pcmMem[memPos++]=0x80;
}
} else {
pcmMem[memPos++]=((unsigned char)sample->data8[readPos]+0x80);
}
readPos++;
if (memPos>=16777216) break;
}
sample->loopOffP=readPos-sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
if (memPos>=16777216) break;
}
for (unsigned char i=0; i<writeSegaPCM; i++) {
for (int i=0; i<2; i++) {
// SegaPCM
if (writeSegaPCM[i]!=NULL && writeSegaPCM[i]->getSampleMemUsage(0)>0) {
w->writeC(0x67);
w->writeC(0x66);
w->writeC(0x80);
w->writeI((memPos+8)|(i*0x80000000));
w->writeI(memPos);
w->writeC(0x81);
w->writeI((writeSegaPCM[i]->getSampleMemUsage(0)+8)|(i*0x80000000));
w->writeI(writeSegaPCM[i]->getSampleMemCapacity(0));
w->writeI(0);
w->write(pcmMem,memPos);
w->write(writeSegaPCM[i]->getSampleMem(0),writeSegaPCM[i]->getSampleMemUsage(0));
}
delete[] pcmMem;
}
for (int i=0; i<2; i++) {
// ADPCM (OPNA)
if (writeADPCM_OPNA[i]!=NULL && writeADPCM_OPNA[i]->getSampleMemUsage(0)>0) {
w->writeC(0x67);