Note app now react to midi input

Author: 203Null

Applications/Note/Note.cpp

@@ -322,6 +322,29 @@ void Note::PlayView() {
     playView.AddUIComponent(noteControlBar, Point(0, 8 - CTL_BAR_Y));
   }
 
+  playView.SetLoopFunc([&]() -> void {  // Update Note Highlight (external MIDI input)
+
+    MidiPacket midiPacket;
+    while (MatrixOS::MIDI::Get(&midiPacket))
+    {
+      auto handlePadHighlight = [&](NotePad& notePad) -> void {
+        if (!notePad.rt || !notePad.rt->config) return;
+        if (midiPacket.Channel() != notePad.rt->config->channel) return;
+
+        if (midiPacket.status == NoteOn) {
+          notePad.SetNoteHighlight(midiPacket.Note(), midiPacket.Velocity() != 0);
+        } else if (midiPacket.status == NoteOff) {
+          notePad.SetNoteHighlight(midiPacket.Note(), false);
+        } else if (midiPacket.status == ControlChange && midiPacket.Controller() == 123) { // All notes off
+          notePad.ClearNoteHighlight();
+        }
+      };
+
+      handlePadHighlight(notePad1);
+      handlePadHighlight(notePad2);
+    }
+  });
+
   playView.Start();
 
   if(runtimes[0].noteLatch.IsEnabled())

Applications/Note/NotePad.cpp

@@ -1,5 +1,6 @@
 #include "NotePad.h"
 #include <algorithm>
+#include <cstring>
 
 const Color polyNoteColor[12] = {
     Color(0x00FFD9),
@@ -138,6 +139,29 @@ void NotePad::UpdateActiveKeyVelocity(Point position, Fract16 velocity) {
     }
 }
 
+// Note highlighting for visualizing notes from external MIDI input.
+void NotePad::SetNoteHighlight(uint8_t note, bool highlight) {
+    if (note >= 128) return;
+    uint8_t byteIndex = note / 8;
+    uint8_t mask = static_cast<uint8_t>(1u << (note % 8));
+    if (highlight) {
+        highlightedNotes[byteIndex] |= mask;
+    } else {
+        highlightedNotes[byteIndex] &= static_cast<uint8_t>(~mask);
+    }
+}
+
+void NotePad::ClearNoteHighlight() {
+    memset(highlightedNotes, 0, sizeof(highlightedNotes));
+}
+
+bool NotePad::IsNoteHighlighted(uint8_t note) const {
+    if (note >= 128) return false;
+    uint8_t byteIndex = note / 8;
+    uint8_t mask = static_cast<uint8_t>(1u << (note % 8));
+    return (highlightedNotes[byteIndex] & mask) != 0;
+}
+
 void NotePad::GenerateOctaveKeymap() {
     noteMap.reserve(dimension.Area());
     int16_t root = 12 * rt->config->octave + rt->config->rootKey + rt->config->rootOffset;
@@ -350,7 +374,7 @@ bool NotePad::RenderRootNScale(Point origin) {
             if (note == 255) {
                 MatrixOS::LED::SetColor(globalPos, Color(0));
             }
-            else if (IsNoteActive(note) || rt->midiPipeline.IsNoteActive(note)) { // If find the note is currently active. Show it as white
+            else if (IsNoteActive(note) || rt->midiPipeline.IsNoteActive(note) || IsNoteHighlighted(note)) { // If find the note is currently active. Show it as white
                 MatrixOS::LED::SetColor(globalPos, Color::White);
             }
             else {
@@ -391,7 +415,7 @@ bool NotePad::RenderColorPerKey(Point origin) {
             if (note == 255) {
                 MatrixOS::LED::SetColor(globalPos, Color(0));
             }
-            else if (IsNoteActive(note) || rt->midiPipeline.IsNoteActive(note)) { // If find the note is currently active. Show it as white
+            else if (IsNoteActive(note) || rt->midiPipeline.IsNoteActive(note)  || IsNoteHighlighted(note)) { // If find the note is currently active. Show it as white
                 MatrixOS::LED::SetColor(globalPos, Color::White);
             }
             else {

Applications/Note/NotePad.h

@@ -97,6 +97,7 @@ class NotePad : public UIComponent {
   NotePadRuntime* rt;
   bool first_scan = true;
   std::vector<ActiveKey> activeKeys;
+  uint8_t highlightedNotes[16] = {0}; // 128 notes as a bitset
 
   NotePad(Dimension dimension, NotePadRuntime* rt);
   ~NotePad();
@@ -118,6 +119,11 @@ class NotePad : public UIComponent {
   void RemoveActiveKey(Point position);
   void UpdateActiveKeyVelocity(Point position, Fract16 velocity);
 
+  // Note highlighting for visualizing notes from external MIDI input.
+  void SetNoteHighlight(uint8_t note, bool highlight);
+  void ClearNoteHighlight();
+  bool IsNoteHighlighted(uint8_t note) const;
+
   void GenerateOctaveKeymap();
   void GenerateOffsetKeymap();
   void GenerateChromaticKeymap();
@@ -134,4 +140,4 @@ class NotePad : public UIComponent {
 
   void SetDimension(Dimension dimension);
   void SetPadRuntime(NotePadRuntime* rt);
-};
+};