From 8c82555e41a6a9edb677756cfe89f28a2918be2a Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Fri, 21 Jul 2017 19:45:59 +0200
Subject: ao_oss: fix a dumb calculation

period_size used the wrong unit, and even if the unit had been correct,
was assigned the wrong value.

Probably fixes #4642.
---
 audio/out/ao_oss.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/audio/out/ao_oss.c b/audio/out/ao_oss.c
index 06f7b3cad5..eebd9622e7 100644
--- a/audio/out/ao_oss.c
+++ b/audio/out/ao_oss.c
@@ -387,8 +387,9 @@ static int reopen_device(struct ao *ao, bool allow_format_changes)
         }
     }
 
-    ao->period_size = channels.num * af_fmt_to_bytes(format);
-    p->outburst -= p->outburst % ao->period_size; // round down
+    int sstride = channels.num * af_fmt_to_bytes(format);
+    p->outburst -= p->outburst % sstride; // round down
+    ao->period_size = p->outburst / sstride;
 
     return 0;
 
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