ao_coreaudio: avoid unnecessary format changes

Not particularly important; just being nice and potentially avoiding
problems caused by format setting.

1 files changed, 6 insertions, 0 deletions

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;