Alternative version with a tone array

[qmk_firmware.git] / quantum / process_keycode / process_midi.c

diff --git a/quantum/process_keycode/process_midi.c b/quantum/process_keycode/process_midi.c
index 8784e64f36770b84e4191998ce83e1a998eec53f..4fbb288162d5a9d4d3b2c06c59b88b284489378a 100644 (file)
--- a/quantum/process_keycode/process_midi.c
+++ b/quantum/process_keycode/process_midi.c
@@ -1,13 +1,181 @@
 #include "process_midi.h"
 
+#if 0
 bool midi_activated = false;
 uint8_t midi_starting_note = 0x0C;
 int midi_offset = 7;
+#endif
 
-bool process_midi(uint16_t keycode, keyrecord_t *record) {
+typedef union {
+  uint16_t raw;
+  struct {
+    uint8_t octave   :4;
+    uint8_t velocity :4;
+    uint8_t channel  :4;
+  };
+} midi_config_t;
+
+midi_config_t midi_config;
+
+#define MIDI_INVALID_NOTE 0xFF
+
+#define MIDI_USE_NOTE_ON_ARRAY
+
+#ifdef MIDI_USE_NOTE_ON_ARRAY
+
+#define MIDI_MAX_NOTES_ON 10
+
+typedef struct {
+    uint8_t note;
+    uint8_t tone;
+} midi_notes_on_array_entry_t;
+
+typedef struct {
+    uint8_t length;
+    midi_notes_on_array_entry_t values[MIDI_MAX_NOTES_ON];
+} midi_notes_on_array_t;
+
+static midi_notes_on_array_t notes_on;
+
+#else
+
+#define MIDI_TONE_COUNT (MIDI_TONE_MAX - MIDI_TONE_MIN + 1)
+static uint8_t tone_status[MIDI_TONE_COUNT];
+
+#endif
+
+
+
+inline uint8_t compute_velocity(uint8_t setting)
+{
+    return (setting + 1) * (128 / (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN + 1));
+}
+
+void midi_init(void)
+{
+    midi_config.octave = MI_OCT_0 - MIDI_OCTAVE_MIN;
+    midi_config.velocity = (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN);
+    midi_config.channel = 0;
+    #ifdef MIDI_USE_NOTE_ON_ARRAY
+    notes_on.length = 0;
+    #else
+    for (uint8_t i = 0; i < MIDI_TONE_COUNT; i++)
+    {
+        tone_status[i] = MIDI_INVALID_NOTE;
+    }
+    #endif
+}
+
+bool process_midi(uint16_t keycode, keyrecord_t *record)
+{
+    switch (keycode) {
+        case MIDI_TONE_MIN ... MIDI_TONE_MAX:
+        {
+            uint8_t channel = midi_config.channel;
+            uint8_t tone = keycode - MIDI_TONE_MIN;
+            uint8_t velocity = compute_velocity(midi_config.velocity);
+            #ifdef MIDI_USE_NOTE_ON_ARRAY
+            if (record->event.pressed && notes_on.length < MIDI_MAX_NOTES_ON) {
+            #else
+            if (record->event.pressed) {
+            #endif
+                uint8_t note = 12 * midi_config.octave + tone;
+                midi_send_noteon(&midi_device, channel, note, velocity);
+                dprintf("midi noteon channel:%d note:%d velocity:%d\n", channel, note, velocity);
+
+                #ifdef MIDI_USE_NOTE_ON_ARRAY
+                
+                notes_on.values[notes_on.length].note = note;
+                notes_on.values[notes_on.length].tone = tone;
+                notes_on.length++;
+                
+                #else
+
+                tone_status[tone] = note;
+
+                #endif
+            }
+            else {
+                
+                #ifdef MIDI_USE_NOTE_ON_ARRAY
+
+                for (uint8_t i = 0; i < notes_on.length; i++) {
+                    uint8_t note = notes_on.values[i].note;
+                    if (tone == notes_on.values[i].tone) {
+                        midi_send_noteoff(&midi_device, channel, note, velocity);
+                        dprintf("midi noteoff channel:%d note:%d velocity:%d\n", channel, note, velocity);
+
+                        for (uint8_t j=i; j < notes_on.length - 1; j++)
+                        {
+                            notes_on.values[j] = notes_on.values[j + 1];
+                        }
+
+                        notes_on.length--;
+                        break;
+                    }
+                }
+
+                #else
+
+                uint8_t note = tone_status[tone];
+                if (note != MIDI_INVALID_NOTE)
+                {
+                    midi_send_noteoff(&midi_device, channel, note, velocity);
+                    dprintf("midi noteoff channel:%d note:%d velocity:%d\n", channel, note, velocity);
+                }
+                tone_status[tone] = MIDI_INVALID_NOTE;
+
+                #endif
+            }
+            return false;
+        }
+        case MIDI_OCTAVE_MIN ... MIDI_OCTAVE_MAX:
+            if (record->event.pressed)
+                midi_config.octave = keycode - MIDI_OCTAVE_MIN;
+            return false;
+        case MI_OCTD:
+            if (record->event.pressed && midi_config.octave > 0)
+                midi_config.octave--;
+            return false;
+        case MI_OCTU:
+            if (record->event.pressed && midi_config.octave < (MIDI_OCTAVE_MAX - MIDI_OCTAVE_MIN))
+                midi_config.octave++;
+            return false;
+        case MIDI_VELOCITY_MIN ... MIDI_VELOCITY_MAX:
+            if (record->event.pressed)
+                midi_config.velocity = keycode - MIDI_VELOCITY_MIN;
+            return false;
+        case MI_VELD:
+            if (record->event.pressed && midi_config.velocity > 0)
+                midi_config.velocity--;
+            return false;
+        case MI_VELU:
+            if (record->event.pressed)
+                midi_config.velocity++;
+            return false;
+        case MIDI_CHANNEL_MIN ... MIDI_CHANNEL_MAX:
+            if (record->event.pressed)
+                midi_config.channel = keycode - MIDI_CHANNEL_MIN;
+            return false;
+        case MI_CHD:
+            if (record->event.pressed)
+                midi_config.channel--;
+            return false;
+        case MI_CHU:
+            if (record->event.pressed)
+                midi_config.channel++;
+            return false;
+        case MI_SUS:
+            //TODO
+            return false;
+    };
+
+#if 0
     if (keycode == MI_ON && record->event.pressed) {
       midi_activated = true;
+#ifdef AUDIO_ENABLE
       music_scale_user();
+#endif
       return false;
     }
 
@@ -62,5 +230,6 @@ bool process_midi(uint16_t keycode, keyrecord_t *record) {
       if (keycode < 0xFF) // ignores all normal keycodes, but lets RAISE, LOWER, etc through
         return false;
     }
-  return true;
-}
\ No newline at end of file
+#endif
+    return true;
+}