Support the opcode oscillator_quality

src/sfizz/Defaults.h

@@ -67,6 +67,8 @@ namespace Default
     constexpr Range<int> oscillatorMultiRange { 1, config::oscillatorsPerVoice };
     constexpr float oscillatorDetune { 0 };
     constexpr Range<float> oscillatorDetuneRange { -9600, 9600 };
+    constexpr int oscillatorQuality { 1 };
+    constexpr Range<int> oscillatorQualityRange { 0, 3 };
 
     // Instrument setting: voice lifecycle
 	constexpr uint32_t group { 0 };

src/sfizz/Region.cpp

@@ -135,6 +135,12 @@ bool sfz::Region::parseOpcode(const Opcode& rawOpcode)
     case hash("oscillator_detune"):
         setValueFromOpcode(opcode, oscillatorDetune, Default::oscillatorDetuneRange);
         break;
+    case hash("oscillator_quality"):
+        if (opcode.value == "-1")
+            oscillatorQuality.reset();
+        else
+            setValueFromOpcode(opcode, oscillatorQuality, Default::oscillatorQualityRange);
+        break;
 
     // Instrument settings: voice lifecycle
     case hash("group"): // also polyphony_group

src/sfizz/Region.h

@@ -276,6 +276,7 @@ struct Region {
     bool oscillator = false;
     int oscillatorMulti = Default::oscillatorMulti;
     float oscillatorDetune = Default::oscillatorDetune;
+    absl::optional<int> oscillatorQuality;
 
     // Instrument settings: voice lifecycle
     uint32_t group { Default::group }; // group

src/sfizz/Voice.cpp

@@ -65,16 +65,20 @@ void sfz::Voice::startVoice(Region* region, int delay, int number, float value,
             wave = resources.wavePool.getWaveSaw();
             break;
         }
+        const int quality = region->oscillatorQuality ? *region->oscillatorQuality : Default::oscillatorQuality;
         for (WavetableOscillator& osc : waveOscillators) {
             osc.setWavetable(wave);
             osc.setPhase(region->getPhase());
+            osc.setQuality(quality);
         }
         setupOscillatorUnison();
     } else if (region->oscillator) {
         const WavetableMulti* wave = resources.wavePool.getFileWave(region->sampleId.filename());
+        const int quality = region->oscillatorQuality ? *region->oscillatorQuality : Default::oscillatorQuality;
         for (WavetableOscillator& osc : waveOscillators) {
             osc.setWavetable(wave);
             osc.setPhase(region->getPhase());
+            osc.setQuality(quality);
         }
         setupOscillatorUnison();
     } else {