summaryrefslogtreecommitdiffstats
path: root/media/libvorbis/lib/smallft.h
diff options
context:
space:
mode:
Diffstat (limited to 'media/libvorbis/lib/smallft.h')
-rw-r--r--media/libvorbis/lib/smallft.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/media/libvorbis/lib/smallft.h b/media/libvorbis/lib/smallft.h
new file mode 100644
index 0000000000..02fe8f9cd4
--- /dev/null
+++ b/media/libvorbis/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 https://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