Readable active voices for VST

sfztools · Jul 26, 2020 · 1594eaa · 1594eaa
1 parent d96b770
commit 1594eaa
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Showing 3 changed files with 16 additions and 0 deletions.
diff --git a/vst/SfizzVstController.cpp b/vst/SfizzVstController.cpp
@@ -47,6 +47,12 @@ tresult PLUGIN_API SfizzVstControllerNoUi::initialize(FUnknown* context)
             Steinberg::String("Stretched tuning"), pid++, nullptr,
             0, Vst::ParameterInfo::kCanAutomate, Vst::kRootUnitId));
 
+    // Output parameters
+    parameters.addParameter(
+        kParamActiveVoicesRange.createParameter(
+            Steinberg::String("Active voices"), pid++, nullptr,
+            0, Vst::ParameterInfo::kIsReadOnly, Vst::kRootUnitId));
+
     // MIDI special controllers
     parameters.addParameter(Steinberg::String("Aftertouch"), nullptr, 0, 0.5, 0, pid++, Vst::kRootUnitId);
     parameters.addParameter(Steinberg::String("Pitch bend"), nullptr, 0, 0.5, 0, pid++, Vst::kRootUnitId);

diff --git a/vst/SfizzVstProcessor.cpp b/vst/SfizzVstProcessor.cpp
@@ -195,6 +195,14 @@ tresult PLUGIN_API SfizzVstProcessor::process(Vst::ProcessData& data)
             _semaToWorker.post();
     }
 
+    if (Vst::IParameterChanges* pc = data.outputParameterChanges) {
+        int32 index;
+        if (Vst::IParamValueQueue* vq = pc->addParameterData(kPidActiveVoices, index)) {
+            const unsigned activeVoices = synth.getNumActiveVoices();
+            vq->addPoint(0, kParamActiveVoicesRange.normalize(activeVoices), index);
+        }
+    }
+
     return kResultTrue;
 }
 

diff --git a/vst/SfizzVstState.h b/vst/SfizzVstState.h
@@ -25,6 +25,7 @@ enum {
     kPidScalaRootKey,
     kPidTuningFrequency,
     kPidStretchedTuning,
+    kPidActiveVoices,
     kPidMidiAftertouch,
     kPidMidiPitchBend,
     kPidMidiCC0,
@@ -93,3 +94,4 @@ static constexpr SfizzParameterRange kParamPreloadSizeRange(8192.0, 1024.0, 6553
 static constexpr SfizzParameterRange kParamScalaRootKey(60.0, 0.0, 127.0);
 static constexpr SfizzParameterRange kParamTuningFrequency(440.0, 300.0, 500.0);
 static constexpr SfizzParameterRange kParamStretchedTuning(0.0, 0.0, 1.0);
+static constexpr SfizzParameterRange kParamActiveVoicesRange(0.0, 0.0, 256.0);