directsound: arrange for definition of _swab on Cygwin

gstdirectsoundsink.c: In function 'gst_directsound_sink_write':
gstdirectsoundsink.c:557: error: implicit declaration of function '_swab'
gstdirectsoundsink.c:557: error: nested extern declaration of '_swab'

diff --git a/sys/directsound/gstdirectsoundsink.c b/sys/directsound/gstdirectsoundsink.c
index e64c8ac..462c412 100644 (file)
--- a/sys/directsound/gstdirectsoundsink.c
+++ b/sys/directsound/gstdirectsoundsink.c
@@ -56,6 +56,13 @@
 
 #include <math.h>
 
+#ifdef __CYGWIN__
+#include <unistd.h>
+#ifndef _swab
+#define _swab swab
+#endif
+#endif
+
 GST_DEBUG_CATEGORY_STATIC (directsoundsink_debug);
 #define GST_CAT_DEFAULT directsoundsink_debug