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