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diff --git a/vorbis/test/util.h b/vorbis/test/util.h
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+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
+ *                                                                  *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
+ * by the Xiph.Org Foundation http://www.xiph.org/                  *
+ *                                                                  *
+ ********************************************************************
+
+ function: utility functions for vorbis codec test suite.
+
+ ********************************************************************/
+
+#define ARRAY_LEN(x)   (sizeof(x)/sizeof(x[0]))
+
+/* Create simple test data consisting of a windowed sine wave. */
+void gen_windowed_sine (float *data, int len, float maximum) ;
+
+/* Set len values of data array to given value. */
+void set_data_in (float * data, unsigned len, float value) ;