added support for pitch wheel modulation

synth/midi_event.h

@@ -0,0 +1,46 @@
+#pragma once
+
+namespace trnr {
+
+enum midi_event_type {
+    note_on = 0,
+    note_off,
+    pitch_wheel,
+    mod_wheel
+};
+
+class midi_event {
+public:
+    midi_event_type type;
+    int offset = 0;
+    int midi_note = 0;
+    float velocity = 1.f;
+    double data = 0;
+
+    void make_note_on(int _midi_note, float _velocity, int _offset = 0)
+    {
+        type = midi_event_type::note_on;
+        midi_note = _midi_note;
+        velocity = _velocity;
+        offset = _offset;
+    }
+
+    void make_note_off(int _midi_note, float _velocity, int _offset = 0)
+    {
+        type = midi_event_type::note_off;
+        midi_note = _midi_note;
+        velocity = _velocity;
+        offset = _offset;
+    }
+
+    void make_pitch_weel(double _pitch, int _offset = 0) {
+        type = midi_event_type::pitch_wheel;
+        data = _pitch;
+    }
+
+    void make_mod_weel(double _mod, int _offset = 0) {
+        type = midi_event_type::pitch_wheel;
+        data = _mod;
+    }
+};
+}