From b1228fc3ff7835b3fd0c33489527fc44601c649b Mon Sep 17 00:00:00 2001
From: Alex Butler <alexheretic@gmail.com>
Date: Sat, 31 Aug 2019 13:33:57 +0100
Subject: [PATCH] Alsa: Set buffer size near to 100ms

---
 src/host/alsa/mod.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/host/alsa/mod.rs b/src/host/alsa/mod.rs
index e030cd1..909c67b 100644
--- a/src/host/alsa/mod.rs
+++ b/src/host/alsa/mod.rs
@@ -1116,6 +1116,16 @@ unsafe fn set_hw_params_from_format(
         return Err(format!("channel count could not be set: {}", e));
     }
 
+    // If this isn't set manually a overlarge buffer may be used causing audio delay
+    if let Err(e) = check_errors(alsa::snd_pcm_hw_params_set_buffer_time_near(
+        pcm_handle,
+        hw_params.0,
+        &mut 100_000,
+        &mut 0,
+    )) {
+        return Err(format!("buffer time could not be set: {}", e));
+    }
+
     if let Err(e) = check_errors(alsa::snd_pcm_hw_params(pcm_handle, hw_params.0)) {
         return Err(format!("hardware params could not be set: {}", e));
     }