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the final part of this branch

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tildearrow 2024-11-04 04:00:50 -05:00
parent a54fb85288
commit b6820fd5d5
1 changed files with 67 additions and 54 deletions
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121
src/engine/vgmOps.cpp
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@ -2680,6 +2680,65 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
} }
} }
auto runStreams=[&](int runTime, int& wtAccum) -> int {
if (!directStream) {
for (int i=0; i<streamID; i++) {
if (loopSample[i]>=0) {
loopTimer[i]-=(loopFreq[i]/44100.0)*(double)runTime;
}
}
bool haveNegatives=false;
for (int i=0; i<streamID; i++) {
if (loopSample[i]>=0) {
if (loopTimer[i]<0) {
haveNegatives=true;
}
}
}
while (haveNegatives) {
// finish all negatives
int nextToTouch=-1;
for (int i=0; i<streamID; i++) {
if (loopSample[i]>=0) {
if (loopTimer[i]<0) {
if (nextToTouch>=0) {
if (loopTimer[nextToTouch]>loopTimer[i]) nextToTouch=i;
} else {
nextToTouch=i;
}
}
}
}
if (nextToTouch>=0) {
double waitTime=runTime+(loopTimer[nextToTouch]*(44100.0/MAX(1,loopFreq[nextToTouch])));
if (waitTime>0) {
w->writeC(0x61);
w->writeS(waitTime);
logV("wait is: %f",waitTime);
runTime-=waitTime;
wtAccum+=waitTime;
}
if (loopSample[nextToTouch]<song.sampleLen) {
DivSample* sample=song.sample[loopSample[nextToTouch]];
// insert loop
if (sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT)<sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)) {
w->writeC(0x93);
w->writeC(nextToTouch);
w->writeI(sampleOff8[loopSample[nextToTouch]]+sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT));
w->writeC(0x81);
w->writeI(sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)-sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT));
}
}
loopSample[nextToTouch]=-1;
} else {
haveNegatives=false;
}
}
}
return runTime;
};
// calculate number of samples in this tick // calculate number of samples in this tick
int totalWait=cycles>>MASTER_CLOCK_PREC; int totalWait=cycles>>MASTER_CLOCK_PREC;
@ -2727,6 +2786,11 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
if (i.second.time>lastOne) { if (i.second.time>lastOne) {
// write delay // write delay
int delay=i.second.time-lastOne; int delay=i.second.time-lastOne;
// handle streams
int wtAccum1=0;
delay=runStreams(delay,wtAccum1);
// ????
if (delay>16) { if (delay>16) {
w->writeC(0x61); w->writeC(0x61);
w->writeS(delay); w->writeS(delay);
@ -2745,60 +2809,9 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
} }
// handle streams // handle streams
if (!directStream) { int wtAccum=0;
for (int i=0; i<streamID; i++) { totalWait=runStreams(totalWait,wtAccum);
if (loopSample[i]>=0) { tickCount+=wtAccum;
loopTimer[i]-=(loopFreq[i]/44100.0)*(double)totalWait;
}
}
bool haveNegatives=false;
for (int i=0; i<streamID; i++) {
if (loopSample[i]>=0) {
if (loopTimer[i]<0) {
haveNegatives=true;
}
}
}
while (haveNegatives) {
// finish all negatives
int nextToTouch=-1;
for (int i=0; i<streamID; i++) {
if (loopSample[i]>=0) {
if (loopTimer[i]<0) {
if (nextToTouch>=0) {
if (loopTimer[nextToTouch]>loopTimer[i]) nextToTouch=i;
} else {
nextToTouch=i;
}
}
}
}
if (nextToTouch>=0) {
double waitTime=totalWait+(loopTimer[nextToTouch]*(44100.0/MAX(1,loopFreq[nextToTouch])));
if (waitTime>0) {
w->writeC(0x61);
w->writeS(waitTime);
logV("wait is: %f",waitTime);
totalWait-=waitTime;
tickCount+=waitTime;
}
if (loopSample[nextToTouch]<song.sampleLen) {
DivSample* sample=song.sample[loopSample[nextToTouch]];
// insert loop
if (sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT)<sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)) {
w->writeC(0x93);
w->writeC(nextToTouch);
w->writeI(sampleOff8[loopSample[nextToTouch]]+sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT));
w->writeC(0x81);
w->writeI(sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)-sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT));
}
}
loopSample[nextToTouch]=-1;
} else {
haveNegatives=false;
}
}
}
// write wait // write wait
if (totalWait>0) { if (totalWait>0) {