From 849a1b38db34dba9a08f7ecb5368f633e5880e7a Mon Sep 17 00:00:00 2001
From: Hiroaki Yutani <yutani.ini@gmail.com>
Date: Sun, 28 Jun 2026 14:24:57 +0900
Subject: [PATCH] feat: Use enum for duty ratio

---
 src/sound.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/sound.rs b/src/sound.rs
index 3834d882..fafe5606 100644
--- a/src/sound.rs
+++ b/src/sound.rs
@@ -13,13 +13,23 @@ impl SweepControl {
   u8_int_field!(4 - 6, sweep_time, with_sweep_time);
 }
 
+#[derive(Debug, Clone, Copy, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(u16)]
+pub enum DutyRatio {
+  _12_5 = 0,
+  _25 = 1,
+  #[default]
+  _50 = 2,
+  _75 = 3,
+}
+
 #[derive(Debug, Clone, Copy, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[repr(transparent)]
 pub struct TonePattern(u16);
 impl TonePattern {
   pub_const_fn_new_zeroed!();
   u16_int_field!(0 - 5, length, with_length);
-  u16_int_field!(6 - 7, duty, with_duty);
+  u16_enum_field!(6 - 7: DutyRatio, duty, with_duty);
   u16_int_field!(8 - 10, step_time, with_step_time);
   u16_bool_field!(11, step_increasing, with_step_increasing);
   u16_int_field!(12 - 15, volume, with_volume);