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Fix MultiPCM sample OOB issue

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This commit is contained in:
cam900 2025-08-30 08:15:13 +09:00
parent 957b57f3d9
commit ffc681b8fa
1 changed files with 52 additions and 36 deletions
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88
src/engine/platform/multipcm.cpp
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@ -630,7 +630,7 @@ void DivPlatformMultiPCM::renderSamples(int sysID) {
memPos+=length;
}
if (actualLength<length) {
logW("out of OPL4 PCM memory for sample %d!",i);
logW("out of MultiPCM memory for sample %d!",i);
break;
}
sampleLoaded[i]=true;
@ -640,49 +640,65 @@ void DivPlatformMultiPCM::renderSamples(int sysID) {
int insCount=parent->song.insLen;
for (int i=0; i<insCount; i++) {
DivInstrument* ins=parent->song.ins[i];
DivSample* s=parent->song.sample[ins->amiga.initSample];
unsigned int insAddr=(i*12);
unsigned char bitDepth;
int startPos=sampleOff[ins->amiga.initSample];
int endPos=CLAMP(s->isLoopable()?s->loopEnd:(s->samples+1),1,0x10000);
int loop=s->isLoopable()?CLAMP(s->loopStart,0,endPos-2):(endPos-2);
switch (s->depth) {
case DIV_SAMPLE_DEPTH_8BIT:
bitDepth=0;
break;
case DIV_SAMPLE_DEPTH_12BIT:
bitDepth=3;
if (!s->isLoopable()) {
endPos++;
loop++;
}
break;
default:
bitDepth=0;
break;
}
pcmMem[insAddr]=(bitDepth<<6)|((startPos>>16)&0x1f);
pcmMem[1+insAddr]=(startPos>>8)&0xff;
pcmMem[2+insAddr]=(startPos)&0xff;
pcmMem[3+insAddr]=(loop>>8)&0xff;
pcmMem[4+insAddr]=(loop)&0xff;
pcmMem[5+insAddr]=((~(endPos-1))>>8)&0xff;
pcmMem[6+insAddr]=(~(endPos-1))&0xff;
if (ins->type==DIV_INS_MULTIPCM) {
pcmMem[7+insAddr]=(ins->multipcm.lfo<<3)|ins->multipcm.vib; // LFO, VIB
pcmMem[8+insAddr]=(ins->multipcm.ar<<4)|ins->multipcm.d1r; // AR, D1R
pcmMem[9+insAddr]=(ins->multipcm.dl<<4)|ins->multipcm.d2r; // DL, D2R
pcmMem[10+insAddr]=(ins->multipcm.rc<<4)|ins->multipcm.rr; // RC, RR
pcmMem[11+insAddr]=ins->multipcm.am; // AM
short sample=ins->amiga.initSample;
if (sample>=0 && sample<parent->song.sampleLen) {
DivSample* s=parent->song.sample[sample];
unsigned char bitDepth;
int startPos=sampleOff[sample];
int endPos=CLAMP(s->isLoopable()?s->loopEnd:(s->samples+1),1,0x10000);
int loop=s->isLoopable()?CLAMP(s->loopStart,0,endPos-2):(endPos-2);
switch (s->depth) {
case DIV_SAMPLE_DEPTH_8BIT:
bitDepth=0;
break;
case DIV_SAMPLE_DEPTH_12BIT:
bitDepth=3;
if (!s->isLoopable()) {
endPos++;
loop++;
}
break;
default:
bitDepth=0;
break;
}
pcmMem[insAddr]=(bitDepth<<6)|((startPos>>16)&0x1f);
pcmMem[1+insAddr]=(startPos>>8)&0xff;
pcmMem[2+insAddr]=(startPos)&0xff;
pcmMem[3+insAddr]=(loop>>8)&0xff;
pcmMem[4+insAddr]=(loop)&0xff;
pcmMem[5+insAddr]=((~(endPos-1))>>8)&0xff;
pcmMem[6+insAddr]=(~(endPos-1))&0xff;
if (ins->type==DIV_INS_MULTIPCM) {
pcmMem[7+insAddr]=(ins->multipcm.lfo<<3)|ins->multipcm.vib; // LFO, VIB
pcmMem[8+insAddr]=(ins->multipcm.ar<<4)|ins->multipcm.d1r; // AR, D1R
pcmMem[9+insAddr]=(ins->multipcm.dl<<4)|ins->multipcm.d2r; // DL, D2R
pcmMem[10+insAddr]=(ins->multipcm.rc<<4)|ins->multipcm.rr; // RC, RR
pcmMem[11+insAddr]=ins->multipcm.am; // AM
} else {
pcmMem[7+insAddr]=0; // LFO, VIB
pcmMem[8+insAddr]=(0xf<<4)|(0xf<<0); // AR, D1R
pcmMem[9+insAddr]=0; // DL, D2R
pcmMem[10+insAddr]=(0xf<<4)|(0xf<<0); // RC, RR
pcmMem[11+insAddr]=0; // AM
}
} else {
// fill to dummy instrument
pcmMem[insAddr]=0;
pcmMem[1+insAddr]=0;
pcmMem[2+insAddr]=0;
pcmMem[3+insAddr]=0;
pcmMem[4+insAddr]=0;
pcmMem[5+insAddr]=0xff;
pcmMem[6+insAddr]=0xff;
pcmMem[7+insAddr]=0; // LFO, VIB
pcmMem[8+insAddr]=(0xf<<4)|(0xf<<0); // AR, D1R
pcmMem[9+insAddr]=0; // DL, D2R
pcmMem[9+insAddr]=(0xf<<4); // DL, D2R
pcmMem[10+insAddr]=(0xf<<4)|(0xf<<0); // RC, RR
pcmMem[11+insAddr]=0; // AM
}
}
memCompo.used=pcmMemLen;
}
memCompo.capacity=getSampleMemCapacity(0);