/********************************************************************

 *                                                                  *

 * 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.

 last mod: $Id: util.c 19015 2013-11-12 04:13:28Z giles $

 ********************************************************************/

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

#include <string.h>

#include <errno.h>

#include <vorbis/codec.h>

#include <vorbis/vorbisenc.h>

#include "util.h"

void

gen_windowed_sine (float *data, int len, float maximum)

{    int k ;

    memset (data, 0, len * sizeof (float)) ;

    len /= 2 ;

    for (k = 0 ; k < len ; k++)

    {    data [k] = sin (2.0 * k * M_PI * 1.0 / 32.0 + 0.4) ;

        /* Apply Hanning Window. */

        data [k] *= maximum * (0.5 - 0.5 * cos (2.0 * M_PI * k / ((len) - 1))) ;

        }

    return ;

}

void

set_data_in (float * data, unsigned len, float value)

{        unsigned k ;

        for (k = 0 ; k < len ; k++)

                data [k] = value ;

}