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dev233 - breaking the limit, part 1

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now up to 32768 wavetables and 32768 samples

this is the first part and does not implement the new sample limit correctly
I have to adapt every dispatch to the new limit... see you in the next part

the format version had to be bumped because the WL and SL .fui features were limited to 256 entries
there are new LW and LS blocks with more space
howwver there's a new issue... we can have a feature larger than 65536, which is a limit imposed by the feature header :<
this will be addressed though
This commit is contained in:
tildearrow 2025-07-26 18:48:23 -05:00
parent c96d2983cd
commit 98030de8c7
9 changed files with 276 additions and 77 deletions
Download patch file Download diff file Expand all files Collapse all files

28
src/engine/vgmOps.cpp
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@ -764,8 +764,8 @@ void DivEngine::performVGMWrite(SafeWriter* w, DivSystem sys, DivRegWrite& write
pendingFreq[streamID]=write.val;
} else {
DivSample* sample=song.sample[write.val];
int pos=sampleOff8[write.val&0xff]+setPos[streamID];
int len=(int)sampleLen8[write.val&0xff]-setPos[streamID];
int pos=sampleOff8[write.val&0x7fff]+setPos[streamID];
int len=(int)sampleLen8[write.val&0x7fff]-setPos[streamID];
if (len<0) len=0;
@ -807,8 +807,8 @@ void DivEngine::performVGMWrite(SafeWriter* w, DivSystem sys, DivRegWrite& write
loopFreq[streamID]=realFreq;
if (pendingFreq[streamID]!=-1) {
DivSample* sample=song.sample[pendingFreq[streamID]];
int pos=sampleOff8[pendingFreq[streamID]&0xff]+setPos[streamID];
int len=(int)sampleLen8[pendingFreq[streamID]&0xff]-setPos[streamID];
int pos=sampleOff8[pendingFreq[streamID]&0x7fff]+setPos[streamID];
int len=(int)sampleLen8[pendingFreq[streamID]&0x7fff]-setPos[streamID];
if (len<0) len=0;
@ -859,8 +859,8 @@ void DivEngine::performVGMWrite(SafeWriter* w, DivSystem sys, DivRegWrite& write
if (playingSample[streamID]!=-1 && pendingFreq[streamID]==-1) {
// play the sample again
DivSample* sample=song.sample[playingSample[streamID]];
int pos=sampleOff8[playingSample[streamID]&0xff]+setPos[streamID];
int len=(int)sampleLen8[playingSample[streamID]&0xff]-setPos[streamID];
int pos=sampleOff8[playingSample[streamID]&0x7fff]+setPos[streamID];
int len=(int)sampleLen8[playingSample[streamID]&0x7fff]-setPos[streamID];
if (len<0) len=0;
@ -1329,9 +1329,9 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
int loopTickSong=-1;
int songTick=0;
unsigned int sampleOff8[256];
unsigned int sampleLen8[256];
unsigned int sampleOffSegaPCM[256];
unsigned int* sampleOff8=new unsigned int[32768];
unsigned int* sampleLen8=new unsigned int[32768];
unsigned int* sampleOffSegaPCM=new unsigned int[32768];
SafeWriter* w=new SafeWriter;
w->init();
@ -2202,9 +2202,9 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
unsigned int songOff=w->tell();
// initialize sample offsets
memset(sampleOff8,0,256*sizeof(unsigned int));
memset(sampleLen8,0,256*sizeof(unsigned int));
memset(sampleOffSegaPCM,0,256*sizeof(unsigned int));
memset(sampleOff8,0,32768*sizeof(unsigned int));
memset(sampleLen8,0,32768*sizeof(unsigned int));
memset(sampleOffSegaPCM,0,32768*sizeof(unsigned int));
// write samples
unsigned int sampleSeek=0;
@ -2968,6 +2968,10 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
logI("%d register writes total.",writeCount);
delete[] sampleOff8;
delete[] sampleLen8;
delete[] sampleOffSegaPCM;
BUSY_END;
return w;
}