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diff src/libvorbis-1.3.3/lib/smallft.h @ 86:98c1576536ae

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Bring in flac, ogg, vorbis
author Chris Cannam <cannam@all-day-breakfast.com>
date Tue, 19 Mar 2013 17:37:49 +0000
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libvorbis-1.3.3/lib/smallft.h	Tue Mar 19 17:37:49 2013 +0000
@@ -0,0 +1,34 @@
+/********************************************************************
+ *                                                                  *
+ * 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