refactor: merge plugin, sampler -> mixer; transport -> sequencer; time -> core

crates/tek_core/src/time_note.rs

@@ -0,0 +1,59 @@
+/// (pulses, name)
+pub const NOTE_DURATIONS: [(usize, &str);26] = [
+    (1,    "1/384"),
+    (2,    "1/192"),
+    (3,    "1/128"),
+    (4,    "1/96"),
+    (6,    "1/64"),
+    (8,    "1/48"),
+    (12,   "1/32"),
+    (16,   "1/24"),
+    (24,   "1/16"),
+    (32,   "1/12"),
+    (48,   "1/8"),
+    (64,   "1/6"),
+    (96,   "1/4"),
+    (128,  "1/3"),
+    (192,  "1/2"),
+    (256,  "2/3"),
+    (384,  "1/1"),
+    (512,  "4/3"),
+    (576,  "3/2"),
+    (768,  "2/1"),
+    (1152, "3/1"),
+    (1536, "4/1"),
+    (2304, "6/1"),
+    (3072, "8/1"),
+    (3456, "9/1"),
+    (6144, "16/1"),
+];
+
+/// Returns the next shorter length
+pub fn prev_note_length (ppq: usize) -> usize {
+    for i in 1..=16 {
+        let length = NOTE_DURATIONS[16-i].0;
+        if length < ppq {
+            return length
+        }
+    }
+    ppq
+}
+
+/// Returns the next longer length
+pub fn next_note_length (ppq: usize) -> usize {
+    for (length, _) in &NOTE_DURATIONS {
+        if *length > ppq {
+            return *length
+        }
+    }
+    ppq
+}
+
+pub fn ppq_to_name (ppq: usize) -> &'static str {
+    for (length, name) in &NOTE_DURATIONS {
+        if *length == ppq {
+            return name
+        }
+    }
+    ""
+}