media/libvorbis/lib/smallft.h
author Benjamin Bouvier <bbouvier@mozilla.com>
Tue, 17 Sep 2013 11:42:26 -0700
changeset 161438 063a0d518fa28433ee1cabf357b81304ca837d51
parent 31034 c6692a8f3f2725faadef43edd3142e533b452e62
child 413158 6ac27d7a3fe4fafb98e93e84739e8205900b5298
permissions -rw-r--r--
Bug 916712: Convert Float32 TableSwitch inputs to doubles; r=jandem

/********************************************************************
 *                                                                  *
 * 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: fft transform
 last mod: $Id: smallft.h 13293 2007-07-24 00:09:47Z xiphmont $

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

#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