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VGM export: implement ADPCM storage

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possibly first open-source Neo Geo tracker that exports to .vgm
This commit is contained in:
tildearrow 2022-01-24 02:52:45 -05:00
parent a3a2e3ff47
commit 1b4081a044
2 changed files with 30 additions and 3 deletions
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29
src/engine/engine.cpp
View file

@ -2074,12 +2074,17 @@ SafeWriter* DivEngine::saveVGM() {
bool willExport[32];
int streamIDs[32];
bool writeDACSamples=false;
bool writeADPCM=false;
bool writeSegaPCM=false;
for (int i=0; i<song.systemLen; i++) {
willExport[i]=false;
streamIDs[i]=0;
switch (song.system[i]) {
case DIV_SYSTEM_GENESIS:
case DIV_SYSTEM_GENESIS_EXT:
writeDACSamples=true;
if (!hasOPN2) {
hasOPN2=7670454;
willExport[i]=true;
@ -2105,12 +2110,14 @@ SafeWriter* DivEngine::saveVGM() {
if (!hasPCE) {
hasPCE=3579545;
willExport[i]=true;
writeDACSamples=true;
}
break;
case DIV_SYSTEM_NES:
if (!hasNES) {
hasNES=1789773;
willExport[i]=true;
writeDACSamples=true;
}
break;
case DIV_SYSTEM_ARCADE:
@ -2121,6 +2128,7 @@ SafeWriter* DivEngine::saveVGM() {
if (!hasSegaPCM) {
hasSegaPCM=4000000;
willExport[i]=true;
writeSegaPCM=true;
}
break;
case DIV_SYSTEM_YM2610:
@ -2128,6 +2136,7 @@ SafeWriter* DivEngine::saveVGM() {
if (!hasOPNB) {
hasOPNB=8000000;
willExport[i]=true;
writeADPCM=true;
}
break;
case DIV_SYSTEM_AY8910:
@ -2149,6 +2158,7 @@ SafeWriter* DivEngine::saveVGM() {
if (!hasOPN2) {
hasOPN2=7670454;
willExport[i]=true;
writeDACSamples=true;
}
break;
case DIV_SYSTEM_YM2151:
@ -2239,11 +2249,11 @@ SafeWriter* DivEngine::saveVGM() {
}
// write samples
for (int i=0; i<song.sampleLen; i++) {
if (writeDACSamples) for (int i=0; i<song.sampleLen; i++) {
DivSample* sample=song.sample[i];
w->writeC(0x67);
w->writeC(0x66);
w->writeC(0); // for now!
w->writeC(0);
w->writeI(sample->rendLength);
if (sample->depth==8) {
for (unsigned int j=0; j<sample->rendLength; j++) {
@ -2256,6 +2266,20 @@ SafeWriter* DivEngine::saveVGM() {
}
}
if (writeSegaPCM) {
// TODO
}
if (writeADPCM && adpcmMemLen>0) {
w->writeC(0x67);
w->writeC(0x66);
w->writeC(0x82);
w->writeI(adpcmMemLen);
w->writeI(adpcmMemLen);
w->writeI(0);
w->write(adpcmMem,adpcmMemLen);
}
// initialize streams
int streamID=0;
for (int i=0; i<song.systemLen; i++) {
@ -2901,6 +2925,7 @@ void DivEngine::renderSamples() {
s->rendOff=memPos;
memPos+=s->adpcmRendLength;
}
adpcmMemLen=memPos;
}
void DivEngine::createNew() {

4
src/engine/engine.h
View file

@ -485,6 +485,7 @@ class DivEngine {
bool quit();
unsigned char* adpcmMem;
size_t adpcmMemLen;
DivEngine():
output(NULL),
@ -532,6 +533,7 @@ class DivEngine {
metroAmp(0.0f),
totalProcessed(0),
jediTable(NULL),
adpcmMem(NULL) {}
adpcmMem(NULL),
adpcmMemLen(0) {}
};
#endif