michael@0: /********************************************************************
michael@0:  *                                                                  *
michael@0:  * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
michael@0:  *                                                                  *
michael@0:  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
michael@0:  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
michael@0:  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
michael@0:  *                                                                  *
michael@0:  * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002    *
michael@0:  * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
michael@0:  *                                                                  *
michael@0:  ********************************************************************
michael@0: 
michael@0:  function: modified discrete cosine transform prototypes
michael@0: 
michael@0:  ********************************************************************/
michael@0: 
michael@0: #ifndef _OGG_mdct_H_
michael@0: #define _OGG_mdct_H_
michael@0: 
michael@0: #include "ivorbiscodec.h"
michael@0: #include "misc.h"
michael@0: 
michael@0: #define DATA_TYPE ogg_int32_t
michael@0: #define REG_TYPE  register ogg_int32_t
michael@0: 
michael@0: #ifdef _LOW_ACCURACY_
michael@0: #define cPI3_8 (0x0062)
michael@0: #define cPI2_8 (0x00b5)
michael@0: #define cPI1_8 (0x00ed)
michael@0: #else
michael@0: #define cPI3_8 (0x30fbc54d)
michael@0: #define cPI2_8 (0x5a82799a)
michael@0: #define cPI1_8 (0x7641af3d)
michael@0: #endif
michael@0: 
michael@0: extern void mdct_forward(int n, DATA_TYPE *in, DATA_TYPE *out);
michael@0: extern void mdct_backward(int n, DATA_TYPE *in, DATA_TYPE *out);
michael@0: 
michael@0: #endif
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