Convert tempo effects.

Introducing an it2midi-specific swing on/off command to aid
real bpm calculation when legacy swing technique is used in
the file.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/utils.rs b/src/utils.rs
index cbe9716..0fc4328 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,4 +1,5 @@
 use std::ops::*;
+use std::fmt::{Debug, Formatter, Error};
 
 #[derive(Copy, Clone)]
 pub struct Rational
@@ -15,6 +16,14 @@ impl Default for Rational
     fn default() -> Rational { Rational::from_int(0) }
 }
 
+impl Debug for Rational
+{
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>
+    {
+        f.write_fmt(format_args!("{}/{}", self.n, self.d))
+    }
+}
+
 impl Add for Rational
 {
     type Output = Self;
@@ -70,6 +79,11 @@ impl From<u8> for Rational
     fn from(v: u8) -> Self { Rational::from_int(v as i64) }
 }
 
+impl From<Rational> for f64
+{
+    fn from(v: Rational) -> Self { v.n as f64 / v.d as f64 }
+}
+
 impl Rational
 {
     fn from_int(v: i64) -> Rational {Rational{n: v, d: 1}}