Split MIDI functionality into MIDI_BASIC and MIDI_ADVANCED

MIDI_ENABLE = no

   text	   data	    bss	    dec	    hex	filename
      0	  17080	      0	  17080	   42b8	satan_midi.hex

MIDI_ENABLE = yes
MIDI_BASIC undefined
MIDI_ADVANCED undefined

   text	   data	    bss	    dec	    hex	filename
      0	  19494	      0	  19494	   4c26	satan_midi.hex

MIDI_ENABLE = yes
#define MIDI_BASIC
MIDI_ADVANCED undefined

   text	   data	    bss	    dec	    hex	filename
      0	  19788	      0	  19788	   4d4c	satan_midi.hex

MIDI_ENABLE = yes
MIDI_BASIC undefined
#define MIDI_ADVANCED

   text	   data	    bss	    dec	    hex	filename
      0	  20846	      0	  20846	   516e	satan_midi.hex

MIDI_ENABLE = yes
#define MIDI_BASIC
#define MIDI_ADVANCED

   text	   data	    bss	    dec	    hex	filename
      0	  21140	      0	  21140	   5294	satan_midi.hex

5 files changed, 57 insertions, 8 deletions

diff --git a/quantum/process_keycode/process_midi.c b/quantum/process_keycode/process_midi.c
index 5530ea97c..161f04a24 100644
--- a/quantum/process_keycode/process_midi.c
+++ b/quantum/process_keycode/process_midi.c
@@ -1,6 +1,7 @@
-#define MIDI_TONE_KEYCODE_OCTAVES 2
-
 #include "process_midi.h"
+
+#if defined(MIDI_ENABLE) && defined(MIDI_ADVANCED)
+
 #include "timer.h"
 
 static uint8_t tone_status[MIDI_TONE_COUNT];
@@ -161,7 +162,7 @@ bool process_midi(uint16_t keycode, keyrecord_t *record)
                 dprintf("midi channel %d\n", midi_config.channel);
             }
             return false;
-        case MI_OFF:
+        case MI_ALLOFF:
             if (record->event.pressed) {
                 midi_send_cc(&midi_device, midi_config.channel, 0x7B, 0);
                 dprintf("midi off\n");
@@ -209,3 +210,5 @@ bool process_midi(uint16_t keycode, keyrecord_t *record)
 
     return true;
 }
+
+#endif // MIDI_ADVANCED
diff --git a/quantum/process_keycode/process_music.c b/quantum/process_keycode/process_music.c
index 1e2648bff..ac906b628 100644
--- a/quantum/process_keycode/process_music.c
+++ b/quantum/process_keycode/process_music.c
@@ -17,6 +17,7 @@ static uint16_t music_sequence_interval = 100;
 
 bool process_music(uint16_t keycode, keyrecord_t *record) {
 
+	#ifdef AUDIO_ENABLE
     if (keycode == AU_ON && record->event.pressed) {
       audio_on();
       return false;
@@ -38,6 +39,7 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
         }
       return false;
     }
+	#endif // AUDIO_ENABLE
 
     if (keycode == MU_ON && record->event.pressed) {
         music_on();
@@ -61,6 +63,7 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
         return false;
     }
 
+	#ifdef AUDIO_ENABLE
     if (keycode == MUV_IN && record->event.pressed) {
         voice_iterate();
         music_scale_user();
@@ -72,11 +75,14 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
         music_scale_user();
         return false;
     }
+	#endif // AUDIO_ENABLE
 
     if (music_activated) {
 
       if (keycode == KC_LCTL && record->event.pressed) { // Start recording
+		#ifdef AUDIO_ENABLE
         stop_all_notes();
+        #endif
         music_sequence_recording = true;
         music_sequence_recorded = false;
         music_sequence_playing = false;
@@ -85,7 +91,9 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
       }
 
       if (keycode == KC_LALT && record->event.pressed) { // Stop recording/playing
+        #ifdef AUDIO_ENABLE
         stop_all_notes();
+        #endif
         if (music_sequence_recording) { // was recording
           music_sequence_recorded = true;
         }
@@ -95,7 +103,9 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
       }
 
       if (keycode == KC_LGUI && record->event.pressed && music_sequence_recorded) { // Start playing
+        #ifdef AUDIO_ENABLE
         stop_all_notes();
+        #endif
         music_sequence_recording = false;
         music_sequence_playing = true;
         music_sequence_position = 0;
@@ -116,6 +126,7 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
       }
       #define MUSIC_MODE_GUITAR
 
+      #ifdef AUDIO_ENABLE
       #ifdef MUSIC_MODE_CHROMATIC
       float freq = ((float)220.0)*pow(2.0, -5.0)*pow(2.0,(music_starting_note + record->event.key.col + music_offset)/12.0+(MATRIX_ROWS - record->event.key.row));
       #elif defined(MUSIC_MODE_GUITAR)
@@ -125,15 +136,20 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
       #else
       float freq = ((float)220.0)*pow(2.0, -5.0)*pow(2.0,(music_starting_note + SCALE[record->event.key.col + music_offset])/12.0+(MATRIX_ROWS - record->event.key.row));
       #endif
+      #endif // AUDIO_ENABLE
 
       if (record->event.pressed) {
+      	#ifdef AUDIO_ENABLE
         play_note(freq, 0xF);
         if (music_sequence_recording) {
           music_sequence[music_sequence_count] = freq;
           music_sequence_count++;
         }
+        #endif
       } else {
+      	#ifdef AUDIO_ENABLE
         stop_note(freq);
+        #endif
       }
 
       if (keycode < 0xFF) // ignores all normal keycodes, but lets RAISE, LOWER, etc through
@@ -161,15 +177,19 @@ void music_on(void) {
 
 void music_off(void) {
     music_activated = 0;
+    #ifdef AUDIO_ENABLE
     stop_all_notes();
+    #endif
 }
 
 
 __attribute__ ((weak))
 void music_on_user() {}
 
+#ifdef AUDIO_ENABLE
 __attribute__ ((weak))
 void audio_on_user() {}
+#endif
 
 __attribute__ ((weak))
 void music_scale_user() {}
@@ -178,8 +198,10 @@ void matrix_scan_music(void) {
   if (music_sequence_playing) {
     if ((music_sequence_timer == 0) || (timer_elapsed(music_sequence_timer) > music_sequence_interval)) {
       music_sequence_timer = timer_read();
+      #ifdef AUDIO_ENABLE
       stop_note(music_sequence[(music_sequence_position - 1 < 0)?(music_sequence_position - 1 + music_sequence_count):(music_sequence_position - 1)]);
       play_note(music_sequence[music_sequence_position], 0xF);
+      #endif
       music_sequence_position = (music_sequence_position + 1) % music_sequence_count;
     }
   }
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 4a6d0355f..83fa87708 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -150,10 +150,10 @@ bool process_record_quantum(keyrecord_t *record) {
 
   if (!(
     process_record_kb(keycode, record) &&
-  #ifdef MIDI_ENABLE
+  #if defined(MIDI_ENABLE) && defined(MIDI_ADVANCED)
     process_midi(keycode, record) &&
   #endif
-  #ifdef AUDIO_ENABLE
+  #if defined(AUDIO_ENABLE) || (defined(MIDI_ENABLE) && defined(MIDI_BASIC))
     process_music(keycode, record) &&
   #endif
   #ifdef TAP_DANCE_ENABLE
diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
index 6d1438051..3b82b7208 100644
--- a/quantum/quantum_keycodes.h
+++ b/quantum/quantum_keycodes.h
@@ -2,7 +2,7 @@
 #ifndef QUANTUM_KEYCODES_H
 #define QUANTUM_KEYCODES_H
 
-#ifdef MIDI_ENABLE
+#if defined(MIDI_ENABLE) && defined(MIDI_ADVANCED)
 #ifndef MIDI_TONE_KEYCODE_OCTAVES
 #define MIDI_TONE_KEYCODE_OCTAVES 3
 #endif
@@ -116,6 +116,12 @@ enum quantum_keycodes {
 #ifdef MIDI_ENABLE
     // Midi
 
+#ifdef MIDI_BASIC
+    MI_ON,  // send midi notes when music mode is enabled
+    MI_OFF, // don't send midi notes when music mode is enabled
+#endif
+
+#ifdef MIDI_ADVANCED
     MIDI_TONE_MIN,
 
 #if MIDI_TONE_KEYCODE_OCTAVES > 0
@@ -321,7 +327,7 @@ enum quantum_keycodes {
     MI_CHD, // previous channel
     MI_CHU, // next channel
 
-    MI_OFF, // all notes off
+    MI_ALLOFF, // all notes off
 
     MI_SUS, // sustain
     MI_PORT, // portamento
@@ -332,7 +338,8 @@ enum quantum_keycodes {
     MI_MOD, // modulation
     MI_MODSD, // decrease modulation speed
     MI_MODSU, // increase modulation speed
-#endif
+#endif // MIDI_ADVANCED
+#endif // MIDI_ENABLE
 
     // Backlight functionality
     BL_0,
diff --git a/quantum/template/config.h b/quantum/template/config.h
index cd6dfa2c6..54db4f242 100644
--- a/quantum/template/config.h
+++ b/quantum/template/config.h
@@ -159,6 +159,23 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //#define NO_ACTION_MACRO
 //#define NO_ACTION_FUNCTION
 
+/*
+ * MIDI options
+ */
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+//#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
 /* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
 //#define MIDI_TONE_KEYCODE_OCTAVES 1