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Diffstat (limited to 'vorbis/lib/smallft.h')
| -rw-r--r-- | vorbis/lib/smallft.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/vorbis/lib/smallft.h b/vorbis/lib/smallft.h new file mode 100644 index 0000000..9e867c6 --- /dev/null +++ b/vorbis/lib/smallft.h @@ -0,0 +1,33 @@ +/******************************************************************** + * * + * 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 + + ********************************************************************/ + +#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 |