1 /********************************************************************
3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
9 * by the Xiph.Org Foundation http://www.xiph.org/ *
11 ********************************************************************
13 function: utility functions for vorbis codec test suite.
14 last mod: $Id: util.c 13293 2007-07-24 00:09:47Z erikd $
16 ********************************************************************/
24 #include <vorbis/codec.h>
25 #include <vorbis/vorbisenc.h>
30 gen_windowed_sine (float *data
, int len
, float maximum
)
33 memset (data
, 0, len
* sizeof (float)) ;
37 for (k
= 0 ; k
< len
; k
++)
38 { data
[k
] = sin (2.0 * k
* M_PI
* 1.0 / 32.0 + 0.4) ;
40 /* Apply Hanning Window. */
41 data
[k
] *= maximum
* (0.5 - 0.5 * cos (2.0 * M_PI
* k
/ ((len
) - 1))) ;
48 set_data_in (float * data
, unsigned len
, float value
)
51 for (k
= 0 ; k
< len
; k
++)