first commit

libraries/FastLED/examples/LuminescentGrand/shared/Keyboard.h

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+
+#ifndef KEYBOARD_H_
+#define KEYBOARD_H_
+
+#include <Arduino.h>
+#include "color.h"
+#include "./util.h"
+
+class KeyboardState;
+
+//   // NOTE: AS OF NOV-12-2013 we've disable all of the auto-sustained
+//  notes in the high end of the keyboard.
+enum {
+  // kFirstNoteNoDamp = 69,  // First key that has no dampener
+  kFirstNoteNoDamp = 89,  // DISABLED - Greater than last key.
+};
+
+inline uint8_t KeyIndex(int midi_pitch) {
+  return constrain(midi_pitch, 21, 108) - 21;
+}
+
+struct Key {
+  Key();
+  void SetOn(uint8_t vel, const ColorHSV& color, uint32_t now_ms);
+  void SetOff(uint32_t now_ms);
+  void SetSustained();
+
+  void Update(uint32_t now_ms, uint32_t delta_ms, bool sustain_pedal_on);
+
+  float VelocityFactor() const;
+  float CalcAttackDecayFactor(uint32_t delta_ms) const;
+  float AttackRemapFactor(uint32_t now_ms);
+  float IntensityFactor() const;
+  void UpdateIntensity(uint32_t now_ms, uint32_t delta_ms);
+
+  bool on_;  // Max number of MIDI keys.
+  bool sustained_;
+  bool sustain_pedal_on_;
+  uint8_t velocity_;
+  int idx_;
+  unsigned long event_time_;
+
+  // 0.0 -> 1.0 How intense the key is, used for light sequences to represent
+  // 0 -> 0% of lights on to 1.0 -> 100% of lights on. this is a smooth
+  // value through time.
+  float intensity_;
+  ColorHSV orig_color_;
+  ColorHSV curr_color_;
+};
+
+// Interface into the Keyboard state.
+// Convenience class which holds all the keys in the keyboard. Also
+// has a convenience function will allows one to map the midi notes
+// (21-108) to the midi keys (0-88).
+class KeyboardState {
+ public:
+ 
+  // NOTE: AS OF NOV-12-2013 we've disable all of the auto-sustained
+  // notes in the high end of the keyboard.
+  //enum {
+    // kFirstNoteNoDamp = 69,  // First key that has no dampener
+  //  kFirstNoteNoDamp = 89,  // DISABLED - Greater than last key.
+  //};
+
+  KeyboardState();
+  void Update(uint32_t now_ms, uint32_t delta_ms);
+
+
+  ////////////////////////////////////
+  // Called when the note is pressed.
+  // Input:
+  //  channel - Ignored.
+  //  midi_note - Value between 21-108 which maps to the keyboard keys.
+  //  velocity - Value between 0-127
+  void HandleNoteOn(uint8_t midi_note, uint8_t velocity, int color_selector_value, uint32_t now_ms);
+
+  /////////////////////////////////////////////////////////
+  // Called when the note is released.
+  // Input:
+  //  channel - Ignored.
+  //  midi_note - Value between 21-108 which maps to the keyboard keys.
+  //  velocity - Value between 0-127
+  void HandleNoteOff(uint8_t midi_note, uint8_t velocity, uint32_t now_ms);
+
+  /////////////////////////////////////////////////////////
+  // This is uninmplemented because the test keyboard didn't
+  // have this functionality. Right now the only thing it does is
+  // print out that the key was pressed.
+  void HandleAfterTouchPoly(uint8_t note, uint8_t pressure);
+
+
+  /////////////////////////////////////////////////////////
+  // Detects whether the foot pedal has been touched.
+  void HandleControlChange(uint8_t d1, uint8_t d2);
+
+
+  static uint8_t KeyIndex(int midi_pitch);
+ 
+  Key* GetKey(int midi_pitch);
+ 
+  static const int kNumKeys = 88;
+  bool sustain_pedal_;
+  Key keys_[kNumKeys];
+};
+
+
+#endif  // KEYBOARD_H_
+