From 79b116d19fa4de2f7b5450acfe77a54524505b7d Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Thu, 9 Feb 2023 13:42:46 +0100
Subject: Enable bypass and bugfixes

---
 src/app.c | 115 +++++++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 83 insertions(+), 32 deletions(-)

(limited to 'src/app.c')

diff --git a/src/app.c b/src/app.c
index 27f88f1..7917a54 100644
--- a/src/app.c
+++ b/src/app.c
@@ -35,12 +35,16 @@
 // Housekeeping and debugging.
 u16 frame = 0;
 u16 n_voices = 0;
+u8 active = 1;
+u8 ch_min = 4;
+u8 ch_max = 8;
 
 typedef struct Voice {
     u8 active;
     u8 channel;
     u8 d1;
     u8 d2;
+    u8 port;
 } Voice;
 
 Voice voices[16] = {0};
@@ -134,76 +138,112 @@ u16 font_numbers[10] = {
     0xF792,
 };
 
+enum Buttons {
+    POLY_PAD_ACTIVE = 11,
+};
+
 void
 app_surface_event(u8 type, u8 index, u8 value) {
-    // switch (type) {
-    //     case  TYPEPAD: {
-    //         // toggle it and store it off, so we can save to flash if we want to
-    //         if (value) {
-    //             buttons[index] = MAXLED * !buttons[index];
-    //         }
-
-    //         // example - light / extinguish pad LEDs
-    //         hal_plot_led(TYPEPAD, index, 0, 0, buttons[index]);
-
-    //         // example - send MIDI
-    //         hal_send_midi(DINMIDI, NOTEON | 0, index, value);
-    //     } break;
-    //     case TYPESETUP: {
-    //         if (value) {
-    //             // Pressing the setup button will save the current buttons/pad
-    //             // state to the flash. The flash memory is USER_AREA_SIZE bytes
-    //             // long and can be organized however we need.
-    //             hal_write_flash(0, buttons, BUTTON_COUNT);
-    //         }
-    //     } break;
-    // }
+    switch (type) {
+        case  TYPEPAD: {
+            if (value && index == POLY_PAD_ACTIVE) {
+                // Stop existing playing notes.
+                for (u8 i = 0; i < 16; i++) {
+                    Voice *voice = &voices[i];
+                    if (voice->active) {
+                        voice->active = 0;
+                        hal_send_midi(
+                            voice->port,
+                            NOTEOFF | voice->channel,
+                            voice->d1,
+                            voice->d2);
+                    }
+                }
+                n_voices = 0;
+                active = !active;
+            }
+            // // toggle it and store it off, so we can save to flash if we want to
+            // if (value) {
+            //     buttons[index] = MAXLED * !buttons[index];
+            // }
+
+            // // example - light / extinguish pad LEDs
+            // hal_plot_led(TYPEPAD, index, 0, 0, buttons[index]);
+
+            // // example - send MIDI
+            // hal_send_midi(DINMIDI, NOTEON | 0, index, value);
+        } break;
+        case TYPESETUP: {
+            // if (value) {
+            //     // Pressing the setup button will save the current buttons/pad
+            //     // state to the flash. The flash memory is USER_AREA_SIZE bytes
+            //     // long and can be organized however we need.
+            //     hal_write_flash(0, buttons, BUTTON_COUNT);
+            // }
+        } break;
+    }
 }
 
 void
 app_midi_event(u8 port, u8 status, u8 d1, u8 d2) {
+    if (!active) {
+        hal_send_midi(port, status, d1, d2);
+        return;
+    }
     u8 channel = status & 0x0F;
     if ((status & 0xF0) == NOTEON) {
+        if (n_voices == (ch_max - ch_min)) {
+            return;
+        }
+
         // Find if the note was already pressed.
-        for (u8 i = 0; i < 16; i++) {
+        for (u8 i = ch_min; i < ch_max; i++) {
             Voice *voice = &voices[i];
-            // Register voice.
+            // Stop voice if needed.
             if (voice->active && voice->d1 == d1) {
                 voice->active = 0;
-                hal_send_midi(port, NOTEOFF | i, d1, d2);
+                hal_send_midi(voice->port,
+                    NOTEOFF | voice->channel,
+                    voice->d1,
+                    voice->d2);
                 break;
             }
         }
 
         // Find next free voice slot.
-        for (u8 i = 0; i < 16; i++) {
+        for (u8 i = ch_min; i < ch_max; i++) {
             Voice *voice = &voices[i];
             // Register voice.
             if (!voice->active) {
                 voice->active = 1;
+                voice->port = port;
                 voice->channel = i;
                 voice->d1 = d1;
                 voice->d2 = d2;
-                hal_send_midi(port, NOTEON | i, d1, d2);
+                hal_send_midi(voice->port,
+                    NOTEON | voice->channel,
+                    voice->d1,
+                    voice->d2);
                 break;
             }
         }
+
         // TODO: if there are no free slots choose the oldest active one.
         // TODO:     - Send noteoff message for the previous active channel.
         // TODO: send noteon message.
+        // TODO: Round robin scheduling?
         n_voices++;
     } else if ((status & 0xF0) == NOTEOFF) {
-        for (u8 i = 0; i < 16; i++) {
+        for (u8 i = ch_min; i < ch_max; i++) {
             Voice *voice = &voices[i];
             // Register voice.
             if (voice->active && voice->d1 == d1) {
                 voice->active = 0;
                 hal_send_midi(port, NOTEOFF | i, d1, d2);
+                n_voices--;
                 break;
             }
         }
-        n_voices--;
-        // hal_send_midi(port, status, d1, d2);
     }
 }
 
@@ -262,12 +302,23 @@ clear_pads(void) {
     }
 }
 
+void
+draw_poly_scene(void) {
+    print_number((n_voices / 10) % 10, MAXLED, MAXLED, MAXLED, 0, 0);
+    print_number(       n_voices % 10, MAXLED, MAXLED, MAXLED, 4, 0);
+
+    if (active) {
+        hal_plot_led(TYPEPAD, 11, 0, MAXLED, 0);
+    } else {
+        hal_plot_led(TYPEPAD, 11, MAXLED, 0, 0);
+    }
+}
+
 void
 render(void) {
     if (frame++ == 1000 / 10) {
         clear_pads();
-        print_number((n_voices / 10) % 10, MAXLED, MAXLED, MAXLED, 0, 0);
-        print_number(       n_voices % 10, MAXLED, MAXLED, MAXLED, 4, 0);
+        draw_poly_scene();
         frame = 0;
     }
 }
-- 
cgit v1.2.1