From 3c3349f926a03c02c7c87b6ad0598e1152cb934d Mon Sep 17 00:00:00 2001
From: Richard Dodd <richard.o.dodd@gmail.com>
Date: Wed, 15 Apr 2020 18:46:54 +0100
Subject: [PATCH] Add some comments.

---
 src/host/alsa/mod.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/host/alsa/mod.rs b/src/host/alsa/mod.rs
index 045765b..217fb40 100644
--- a/src/host/alsa/mod.rs
+++ b/src/host/alsa/mod.rs
@@ -799,6 +799,7 @@ fn set_hw_params_from_format<'a>(
     // If this isn't set manually a overlarge buffer may be used causing audio delay
     let mut hw_params_copy = hw_params.clone();
     if let Err(_) = hw_params.set_buffer_time_near(100_000, alsa::ValueOr::Nearest) {
+        // Swap out the params with errors for a snapshot taken before the error was introduced.
         mem::swap(&mut hw_params_copy, &mut hw_params);
     }