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components/spotify/cspot/bell/external/tremor/mdct.h

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+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggVorbis 'TREMOR' 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 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003    *
+ * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
+ *                                                                  *
+ ********************************************************************
+
+ function: modified discrete cosine transform prototypes
+
+ ********************************************************************/
+
+#ifndef _OGG_mdct_H_
+#define _OGG_mdct_H_
+
+#include "ivorbiscodec.h"
+#include "misc.h"
+
+#define DATA_TYPE ogg_int32_t
+#define REG_TYPE  register ogg_int32_t
+
+#ifdef _LOW_ACCURACY_
+#define cPI3_8 (0x0062)
+#define cPI2_8 (0x00b5)
+#define cPI1_8 (0x00ed)
+#else
+#define cPI3_8 (0x30fbc54d)
+#define cPI2_8 (0x5a82799a)
+#define cPI1_8 (0x7641af3d)
+#endif
+
+extern void mdct_backward(int n, DATA_TYPE *in);
+extern void mdct_shift_right(int n, DATA_TYPE *in, DATA_TYPE *right);
+extern void mdct_unroll_lap(int n0,int n1,
+			    int lW,int W,
+			    DATA_TYPE *in,DATA_TYPE *right,
+			    LOOKUP_T *w0,LOOKUP_T *w1,
+			    ogg_int16_t *out,
+			    int step,
+			    int start,int end /* samples, this frame */);
+
+#endif
+
+
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