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📄 smallft.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 1994-2002             * * by the XIPHOPHORUS Company http://www.xiph.org/                  * *                                                                  * ******************************************************************** function: fft transform last mod: $Id: smallft.h 1919 2005-07-24 14:18:04Z baford $ ********************************************************************/#ifndef _V_SMFT_H_#define _V_SMFT_H_#include "vorbis/codec.h"typedef struct {  int n;  float *trigcache;  int *splitcache;} drft_lookup;extern void drft_forward(drft_lookup *l,float *data);extern void drft_backward(drft_lookup *l,float *data);extern void drft_init(drft_lookup *l,int n);extern void drft_clear(drft_lookup *l);#endif

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