From 42e2e53f664e51da60467fff99b84cab6491e744 Mon Sep 17 00:00:00 2001
From: Nicolas Braud-Santoni <nicolas@braud-santoni.eu>
Date: Thu, 1 Oct 2020 16:48:28 +0200
Subject: [PATCH] conversions::Sample: Fix bug in linear interpolation for u16

The previous implementation panicked if first > second.
---
 src/conversions/sample.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/conversions/sample.rs b/src/conversions/sample.rs
index 85735bb..1fe8f18 100644
--- a/src/conversions/sample.rs
+++ b/src/conversions/sample.rs
@@ -84,7 +84,11 @@ pub trait Sample: CpalSample {
 impl Sample for u16 {
     #[inline]
     fn lerp(first: u16, second: u16, numerator: u32, denominator: u32) -> u16 {
-        (first as u32 + (second as u32 - first as u32) * numerator / denominator) as u16
+        let a = first as i32;
+        let b = second as i32;
+        let n = numerator as i32;
+        let d = denominator as i32;
+        (a + (b - a) * n / d) as u16
     }
 
     #[inline]