sampler trigger note

Author: benkuper

Source/Node/nodes/sampler/SamplerNode.cpp

@@ -39,6 +39,10 @@ SamplerNode::SamplerNode(var params) :
 
     oneShotFadeTimeMS = playCC.addIntParameter("One Shot Fade MS", "Fade applied to the end of a hit/one shot sample (ms)", 10, 0, 1000);
 
+    playNoteNumber = playCC.addIntParameter("Play Note", "Choose note to trigger", 60, 0, 127);
+    playNoteTimeMS = playCC.addIntParameter("Play Note Time", "Duration (ms) before it sends a note off automatically. 0 means infinite until manually stopped.", 500, 0, 10000);
+    playNoteTrigger = playCC.addTrigger("Trigger Note", "Trigger the chosen note");
+
 
     addChildControllableContainer(&playCC, false, 0);
 
@@ -488,6 +492,33 @@ void SamplerNode::onControllableFeedbackUpdateInternal(ControllableContainer* cc
     {
         computeAutoKeys();
     }
+    else if (c == playNoteTrigger)
+    {
+        int note = playNoteNumber->intValue();
+        handleNoteOn(&keyboardState, 1, note, 1.0f);
+        
+        int durationMS = playNoteTimeMS->intValue();
+        if (durationMS > 0)
+        {
+            GenericScopedLock<SpinLock> lock(scheduledNoteOffsLock);
+            int samples = durationMS * processor->getSampleRate() / 1000;
+            // check if already scheduling this note off
+            bool found = false;
+            for (auto& sn : scheduledNoteOffs)
+            {
+                if (sn.first == note)
+                {
+                    sn.second = samples; // update duration
+                    found = true;
+                    break;
+                }
+            }
+            if (!found)
+            {
+                scheduledNoteOffs.add({note, samples});
+            }
+        }
+    }
 }
 
 void SamplerNode::controllableStateChanged(Controllable* c)
@@ -830,6 +861,23 @@ void SamplerNode::processBlockInternal(AudioBuffer<float>& buffer, MidiBuffer& m
 
     int blockSize = buffer.getNumSamples();
 
+    {
+        GenericScopedTryLock<SpinLock> lock(scheduledNoteOffsLock);
+        if (lock.isLocked() && scheduledNoteOffs.size() > 0)
+        {
+            for (int i = scheduledNoteOffs.size() - 1; i >= 0; i--)
+            {
+                scheduledNoteOffs.getReference(i).second -= blockSize;
+                if (scheduledNoteOffs.getReference(i).second <= 0)
+                {
+                    int note = scheduledNoteOffs.getReference(i).first;
+                    handleNoteOff(&keyboardState, 1, note, 1.0f);
+                    scheduledNoteOffs.remove(i);
+                }
+            }
+        }
+    }
+
     if (isRecording->boolValue())
     {
         GenericScopedTryLock<SpinLock> lock(recLock);

Source/Node/nodes/sampler/SamplerNode.h

@@ -39,20 +39,28 @@ class SamplerNode :
     BoolParameter* autoKeyLoopFade;
     EnumParameter* autoKeyMode;
 
+    // --- Trigger Action ---
+    IntParameter* playNoteNumber;
+    Trigger* playNoteTrigger;
+    IntParameter* playNoteTimeMS;
+
+    Array<std::pair<int, int>> scheduledNoteOffs; // Note number, remaining samples
+    SpinLock scheduledNoteOffsLock;
+
     // --- New RubberBand Parameters ---
     BoolParameter* rbPreserveFormants;
     EnumParameter* rbPitchMode;
     EnumParameter* rbTransients;
     EnumParameter* rbWindowSize;
 
     ControllableContainer controlsCC;
-    BoolParameter* clearMode;
-    enum ClearMode { LAST_PLAYED, LAST_RECORDED };
-    EnumParameter* clearLastMode;
-    Trigger* clearLastRecordedTrigger;
-    Trigger* clearAllNotesTrigger;
-    EnumParameter* revertLastMode;
-    Trigger* revertLastRecordedTrigger;
+    BoolParameter* clearMode;
+    enum ClearMode { LAST_PLAYED, LAST_RECORDED };
+    EnumParameter* clearLastMode;
+    Trigger* clearLastRecordedTrigger;
+    Trigger* clearAllNotesTrigger;
+    EnumParameter* revertLastMode;
+    Trigger* revertLastRecordedTrigger;
     IntParameter* startAutoKey;
     IntParameter* endAutoKey;
     Trigger* computeAutoKeysTrigger;
@@ -130,10 +138,10 @@ class SamplerNode :
         float oldFadeStartGain = 0.0f;
 
 
-        AudioSampleBuffer buffer;
-
-        //offline pitching
-        double shifting = 0;
+        AudioSampleBuffer buffer;
+
+        //offline pitching
+        double shifting = 0;
         int fadeNumSamples = 0;
         int autoKeyAlgorithm = 0;
         bool loopFadeEnabled = false;
@@ -155,20 +163,20 @@ class SamplerNode :
         void setAutoKey(SamplerNote* remoteNote, double shift = 0);
         void computeAutoKey(SamplerNote* remoteNote, double shift, int fadeSamples, int algorithm, bool formants, int transients, int pitchMode, int windowSize, bool shouldLoopFade);
 
-        void run();
-
-        void reset();
-
-        bool hasContent() const { return buffer.getNumSamples() > 0; }
-        bool isProxyNote() const { return autoKeyFromNote != nullptr; }
-    };
-
-    OwnedArray<SamplerNote> samplerNotes;
-
-    void revertNote(int note);
-    void clearNote(int note);
-    void clearAllNotes();
-    void resetAllNotes();
+        void run();
+
+        void reset();
+
+        bool hasContent() const { return buffer.getNumSamples() > 0; }
+        bool isProxyNote() const { return autoKeyFromNote != nullptr; }
+    };
+
+    OwnedArray<SamplerNote> samplerNotes;
+
+    void clearNote(int note);
+    void revertNote(int note);
+    void clearAllNotes();
+    void resetAllNotes();
 
     void computeAutoKeys();