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VGM export: fix up SegaPCM

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turns out it is capable of arbitrary loop position!
This commit is contained in:
tildearrow 2022-01-24 15:23:42 -05:00
parent 9654c6a85d
commit 50a0f1f360
3 changed files with 23 additions and 20 deletions
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14
src/engine/engine.cpp
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@ -2032,7 +2032,7 @@ SafeWriter* DivEngine::saveVGM() {
int hasOPN2=0;
int hasOPM=0;
int hasSegaPCM=0;
int segaPCMOffset=0x2000;
int segaPCMOffset=0xf8000d;
int hasRFC=0;
int hasOPN=0;
int hasOPNA=0;
@ -2281,24 +2281,28 @@ SafeWriter* DivEngine::saveVGM() {
size_t memPos=0;
for (int i=0; i<song.sampleLen; i++) {
DivSample* sample=song.sample[i];
if ((memPos&0xff0000)!=((memPos+sample->rendLength)&0xff0000)) {
memPos=(memPos+0xffff)&0xff0000;
}
if (memPos>=16777216) break;
sample->rendOffP=memPos;
unsigned int alignedSize=(sample->rendLength+0xff)&(~0xff);
if (alignedSize>65536) alignedSize=65536;
if (sample->depth==8) {
for (unsigned int j=0; j<alignedSize; j++) {
if (j>=sample->rendLength) {
pcmMem[memPos++]=0;
pcmMem[memPos++]=0x80;
} else {
pcmMem[memPos++]=((unsigned char)sample->rendData[j]);
pcmMem[memPos++]=((unsigned char)sample->rendData[j]+0x80);
}
if (memPos>=16777216) break;
}
} else {
for (unsigned int j=0; j<alignedSize; j++) {
if (j>=sample->rendLength) {
pcmMem[memPos++]=0;
pcmMem[memPos++]=0x80;
} else {
pcmMem[memPos++]=(((unsigned short)sample->rendData[j])>>8);
pcmMem[memPos++]=(((unsigned short)sample->rendData[j]+0x8000)>>8);
}
if (memPos>=16777216) break;
}