From 78112c858246f9018140d87d8cfc32868ff56fbb Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Wed, 21 Oct 2015 18:54:36 +0200
Subject: ao_coreaudio: avoid unnecessary format changes

Not particularly important; just being nice and potentially avoiding
problems caused by format setting.
---
 audio/out/ao_coreaudio.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'audio')

diff --git a/audio/out/ao_coreaudio.c b/audio/out/ao_coreaudio.c
index 90aa672de6..facbc601f6 100644
--- a/audio/out/ao_coreaudio.c
+++ b/audio/out/ao_coreaudio.c
@@ -237,6 +237,12 @@ static void init_physical_format(struct ao *ao)
                          &p->original_asbd);
             CHECK_CA_WARN("could not get current physical stream format");
 
+            if (ca_asbd_equals(&p->original_asbd, &best_asbd)) {
+                MP_VERBOSE(ao, "Requested format already set, not changing.\n");
+                p->original_asbd.mFormatID = 0;
+                break;
+            }
+
             if (!ca_change_physical_format_sync(ao, streams[i], best_asbd))
                 p->original_asbd = (AudioStreamBasicDescription){0};
             break;
-- 
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