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https://github.com/tildearrow/furnace.git
synced 2024-11-01 18:42:40 +00:00
add effects to change virtual tempo
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parent
779d1aeb61
commit
3512591fd1
7 changed files with 50 additions and 8 deletions
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@ -70,6 +70,9 @@ not all chips support these effects.
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- `xxx` may be from `000` to `3FF`.
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- `F0xx`: **Set BPM.** changes tick rate according to beats per minute. range is `01` to `FF`.
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- ---
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- `FDxx`: **Set virtual tempo numerator.** sets the virtual tempo's numerator to the effect value.
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- `FExx`: **Set virtual tempo denominator.** sets the virtual tempo's denominator to the effect value.
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- ---
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- `0Bxx`: **Jump to order.** `x` is the order to play after the current row.
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- this marks the end of a loop with order `x` as the loop start.
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- `0Dxx`: **Jump to next pattern.** skips the current row and remainder of current order. `x` is the row at which to start playing the next pattern.
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@ -141,6 +141,10 @@ const char* DivEngine::getEffectDesc(unsigned char effect, int chan, bool notNul
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return "FAxx: Fast volume slide (0y: down; x0: up)";
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case 0xfc:
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return "FCxx: Note release";
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case 0xfd:
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return "FDxx: Set virtual tempo numerator";
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case 0xfe:
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return "FExx: Set virtual tempo denominator";
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case 0xff:
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return "FFxx: Stop song";
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default:
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@ -1683,7 +1687,7 @@ void DivEngine::playSub(bool preserveDrift, int goalRow) {
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runMidiTime(cycles);
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}
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if (oldOrder!=curOrder) break;
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if (ticks-((tempoAccum+curSubSong->virtualTempoN)/MAX(1,curSubSong->virtualTempoD))<1 && curRow>=goalRow) break;
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if (ticks-((tempoAccum+virtualTempoN)/MAX(1,virtualTempoD))<1 && curRow>=goalRow) break;
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}
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for (int i=0; i<song.systemLen; i++) disCont[i].dispatch->setSkipRegisterWrites(false);
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if (goal>0 || goalRow>0) {
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@ -2121,6 +2125,8 @@ void DivEngine::reset() {
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extValue=0;
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extValuePresent=0;
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speeds=curSubSong->speeds;
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virtualTempoN=curSubSong->virtualTempoN;
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virtualTempoD=curSubSong->virtualTempoD;
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firstTick=false;
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shallStop=false;
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shallStopSched=false;
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@ -2368,6 +2374,21 @@ float DivEngine::getCurHz() {
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return divider;
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}
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short DivEngine::getVirtualTempoN() {
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return virtualTempoN;
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}
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short DivEngine::getVirtualTempoD() {
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return virtualTempoD;
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}
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void DivEngine::virtualTempoChanged() {
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BUSY_BEGIN;
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virtualTempoN=curSubSong->virtualTempoN;
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virtualTempoD=curSubSong->virtualTempoD;
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BUSY_END;
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}
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int DivEngine::getTotalSeconds() {
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return totalSeconds;
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}
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@ -442,6 +442,7 @@ class DivEngine {
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int curMidiTimePiece, curMidiTimeCode;
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unsigned char extValue, pendingMetroTick;
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DivGroovePattern speeds;
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short virtualTempoN, virtualTempoD;
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short tempoAccum;
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DivStatusView view;
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DivHaltPositions haltOn;
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@ -891,6 +892,13 @@ class DivEngine {
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// get current Hz
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float getCurHz();
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// get virtual tempo
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short getVirtualTempoN();
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short getVirtualTempoD();
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// tell engine about virtual tempo changes
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void virtualTempoChanged();
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// get time
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int getTotalTicks(); // 1/1000000th of a second
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int getTotalSeconds();
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@ -1334,6 +1342,8 @@ class DivEngine {
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curMidiTimeCode(0),
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extValue(0),
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pendingMetroTick(0),
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virtualTempoN(150),
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virtualTempoD(150),
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tempoAccum(0),
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view(DIV_STATUS_NOTHING),
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haltOn(DIV_HALT_NONE),
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@ -487,6 +487,12 @@ void DivEngine::processRow(int i, bool afterDelay) {
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if (effectVal>0) speeds.val[0]=effectVal;
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}
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break;
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case 0xfd: // virtual tempo num
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if (effectVal>0) virtualTempoN=effectVal;
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break;
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case 0xfe: // virtual tempo den
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if (effectVal>0) virtualTempoD=effectVal;
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break;
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case 0x0b: // change order
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if (changeOrd==-1 || song.jumpTreatment==0) {
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changeOrd=effectVal;
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@ -1442,9 +1448,9 @@ bool DivEngine::nextTick(bool noAccum, bool inhibitLowLat) {
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subticks=tickMult;
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if (stepPlay!=1) {
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tempoAccum+=(skipping && curSubSong->virtualTempoN<curSubSong->virtualTempoD)?curSubSong->virtualTempoD:curSubSong->virtualTempoN;
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while (tempoAccum>=curSubSong->virtualTempoD) {
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tempoAccum-=curSubSong->virtualTempoD;
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tempoAccum+=(skipping && virtualTempoN<virtualTempoD)?virtualTempoD:virtualTempoN;
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while (tempoAccum>=virtualTempoD) {
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tempoAccum-=virtualTempoD;
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if (--ticks<=0) {
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ret=endOfSong;
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if (shallStopSched) {
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@ -1693,7 +1699,7 @@ void DivEngine::runMidiClock(int totalCycles) {
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if (hl<=0.0) hl=4.0;
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double timeBase=curSubSong->timeBase+1;
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double speedSum=0;
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double vD=curSubSong->virtualTempoD;
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double vD=virtualTempoD;
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for (int i=0; i<MIN(16,speeds.len); i++) {
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speedSum+=speeds.val[i];
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}
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@ -1701,7 +1707,7 @@ void DivEngine::runMidiClock(int totalCycles) {
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if (timeBase<1.0) timeBase=1.0;
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if (speedSum<1.0) speedSum=1.0;
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if (vD<1) vD=1;
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double bpm=((24.0*divider)/(timeBase*hl*speedSum))*(double)curSubSong->virtualTempoN/vD;
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double bpm=((24.0*divider)/(timeBase*hl*speedSum))*(double)virtualTempoN/vD;
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if (bpm<1.0) bpm=1.0;
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int increment=got.rate*pow(2,MASTER_CLOCK_PREC)/(bpm);
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@ -2424,7 +2424,7 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool p
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while (!done) {
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if (loopPos==-1) {
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if (loopOrder==curOrder && loopRow==curRow) {
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if ((ticks-((tempoAccum+curSubSong->virtualTempoN)/curSubSong->virtualTempoD))<=0) {
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if ((ticks-((tempoAccum+virtualTempoN)/virtualTempoD))<=0) {
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writeLoop=true;
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}
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}
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@ -4446,7 +4446,7 @@ bool FurnaceGUI::loop() {
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info="| Groove";
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}
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info+=fmt::sprintf(" @ %gHz (%g BPM) ",e->getCurHz(),calcBPM(e->getSpeeds(),e->getCurHz(),e->curSubSong->virtualTempoN,e->curSubSong->virtualTempoD));
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info+=fmt::sprintf(" @ %gHz (%g BPM) ",e->getCurHz(),calcBPM(e->getSpeeds(),e->getCurHz(),e->getVirtualTempoN(),e->getVirtualTempoD()));
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if (settings.orderRowsBase) {
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info+=fmt::sprintf("| Order %.2X/%.2X ",playOrder,e->curSubSong->ordersLen-1);
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@ -171,6 +171,7 @@ void FurnaceGUI::drawSpeed(bool asChild) {
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if (ImGui::InputScalar("##VTempoN",ImGuiDataType_S16,&e->curSubSong->virtualTempoN,&_ONE,&_TEN)) { MARK_MODIFIED
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if (e->curSubSong->virtualTempoN<1) e->curSubSong->virtualTempoN=1;
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if (e->curSubSong->virtualTempoN>255) e->curSubSong->virtualTempoN=255;
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e->virtualTempoChanged();
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}
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if (ImGui::IsItemHovered()) {
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ImGui::SetTooltip("Numerator");
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@ -180,6 +181,7 @@ void FurnaceGUI::drawSpeed(bool asChild) {
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if (ImGui::InputScalar("##VTempoD",ImGuiDataType_S16,&e->curSubSong->virtualTempoD,&_ONE,&_TEN)) { MARK_MODIFIED
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if (e->curSubSong->virtualTempoD<1) e->curSubSong->virtualTempoD=1;
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if (e->curSubSong->virtualTempoD>255) e->curSubSong->virtualTempoD=255;
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e->virtualTempoChanged();
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}
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if (ImGui::IsItemHovered()) {
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ImGui::SetTooltip("Denominator (set to base tempo)");
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