convert to unix line-endings [skip ci]

[qmk_firmware.git] / quantum / audio / voices.c

diff --git a/quantum/audio/voices.c b/quantum/audio/voices.c
index 06ff275ba43b985739b74e737a392865ccab9914..94147ccb660e8a72f50459263065515a9676fb0c 100644 (file)
--- a/quantum/audio/voices.c
+++ b/quantum/audio/voices.c
@@ -1,3 +1,18 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #include "voices.h"
 #include "audio.h"
 #include "stdlib.h"
@@ -24,15 +39,18 @@ void voice_deiterate() {
 
 float voice_envelope(float frequency) {
     // envelope_index ranges from 0 to 0xFFFF, which is preserved at 880.0 Hz
+    __attribute__ ((unused))
     uint16_t compensated_index = (uint16_t)((float)envelope_index * (880.0 / frequency));
 
     switch (voice) {
         case default_voice:
-            glissando = true;
+            glissando = false;
             note_timbre = TIMBRE_50;
             polyphony_rate = 0;
                break;
 
+    #ifdef AUDIO_VOICES
+
         case something:
             glissando = false;
             polyphony_rate = 0;
@@ -58,36 +76,87 @@ float voice_envelope(float frequency) {
         case drums:
             glissando = false;
             polyphony_rate = 0;
-                note_timbre = 0;
+                // switch (compensated_index) {
+                //     case 0 ... 10:
+                //         note_timbre = 0.5;
+                //         break;
+                //     case 11 ... 20:
+                //         note_timbre = 0.5 * (21 - compensated_index) / 10;
+                //         break;
+                //     default:
+                //         note_timbre = 0;
+                //         break;
+                // }
+                // frequency = (rand() % (int)(frequency * 1.2 - frequency)) + (frequency * 0.8);
+
+            if (frequency < 80.0) {
+
+            } else if (frequency < 160.0) {
+
+                // Bass drum: 60 - 100 Hz
+                frequency = (rand() % (int)(40)) + 60;
+                switch (envelope_index) {
+                    case 0 ... 10:
+                        note_timbre = 0.5;
+                        break;
+                    case 11 ... 20:
+                        note_timbre = 0.5 * (21 - envelope_index) / 10;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            } else if (frequency < 320.0) {
+
+
+                // Snare drum: 1 - 2 KHz
+                frequency = (rand() % (int)(1000)) + 1000;
+                switch (envelope_index) {
+                    case 0 ... 5:
+                        note_timbre = 0.5;
+                        break;
+                    case 6 ... 20:
+                        note_timbre = 0.5 * (21 - envelope_index) / 15;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            } else if (frequency < 640.0) {
+
+                // Closed Hi-hat: 3 - 5 KHz
+                frequency = (rand() % (int)(2000)) + 3000;
                 switch (envelope_index) {
-                    case 0 ... 20:
+                    case 0 ... 15:
                         note_timbre = 0.5;
+                        break;
+                    case 16 ... 20:
+                        note_timbre = 0.5 * (21 - envelope_index) / 5;
+                        break;
                     default:
-                        frequency = (rand() % (int)(frequency * 1.2 - frequency)) + (frequency * 0.8);
+                        note_timbre = 0;
                         break;
                 }
-            // if (frequency < 80.0) {
-            //     switch (envelope_index % 4) {
-            //         case 0:
-            //             frequency = 348.0;
-            //         case 1:
-            //             frequency = 53.0;
-            //         case 2:
-            //             frequency = 128.0;
-            //         case 3:
-            //             frequency = 934.0;
-            //         default:
-            //             break;
-            //     }
-            // } else if (frequency < 160.0) {
-
-            // } else if (frequency < 320.0) {
-
-            // } else if (frequency < 640.0) {
-
-            // } else if (frequency < 1280.0) {
-
-            // }
+
+            } else if (frequency < 1280.0) {
+
+                // Open Hi-hat: 3 - 5 KHz
+                frequency = (rand() % (int)(2000)) + 3000;
+                switch (envelope_index) {
+                    case 0 ... 35:
+                        note_timbre = 0.5;
+                        break;
+                    case 36 ... 50:
+                        note_timbre = 0.5 * (51 - envelope_index) / 15;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            }
             break;
         case butts_fader:
             glissando = true;
@@ -217,11 +286,11 @@ float voice_envelope(float frequency) {
         //         note_timbre = 0.25;
         //     break;
 
+    #endif
+
                default:
                        break;
     }
 
     return frequency;
 }
-
-