annotate src/libvorbis-1.3.3/lib/smallft.h @ 169:223a55898ab9 tip default

Add null config files
author Chris Cannam <cannam@all-day-breakfast.com>
date Mon, 02 Mar 2020 14:03:47 +0000
parents 98c1576536ae
children
rev   line source
cannam@86 1 /********************************************************************
cannam@86 2 * *
cannam@86 3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
cannam@86 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
cannam@86 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
cannam@86 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
cannam@86 7 * *
cannam@86 8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
cannam@86 9 * by the Xiph.Org Foundation http://www.xiph.org/ *
cannam@86 10 * *
cannam@86 11 ********************************************************************
cannam@86 12
cannam@86 13 function: fft transform
cannam@86 14 last mod: $Id: smallft.h 13293 2007-07-24 00:09:47Z xiphmont $
cannam@86 15
cannam@86 16 ********************************************************************/
cannam@86 17
cannam@86 18 #ifndef _V_SMFT_H_
cannam@86 19 #define _V_SMFT_H_
cannam@86 20
cannam@86 21 #include "vorbis/codec.h"
cannam@86 22
cannam@86 23 typedef struct {
cannam@86 24 int n;
cannam@86 25 float *trigcache;
cannam@86 26 int *splitcache;
cannam@86 27 } drft_lookup;
cannam@86 28
cannam@86 29 extern void drft_forward(drft_lookup *l,float *data);
cannam@86 30 extern void drft_backward(drft_lookup *l,float *data);
cannam@86 31 extern void drft_init(drft_lookup *l,int n);
cannam@86 32 extern void drft_clear(drft_lookup *l);
cannam@86 33
cannam@86 34 #endif