d9a291f641
Took the opportunity to undo the Godot changed made to the opus source. The opus module should eventually be built in its own environment to avoid polluting others with too many include dirs and defines. TODO: Fix the platform/ stuff for opus.
72 lines
2 KiB
C++
72 lines
2 KiB
C++
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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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 SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
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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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last mod: $Id: mdct.h 16227 2009-07-08 06:58:46Z xiphmont $
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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 "vorbis/codec.h"
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/*#define MDCT_INTEGERIZED <- be warned there could be some hurt left here*/
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#ifdef MDCT_INTEGERIZED
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#define DATA_TYPE int
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#define REG_TYPE register int
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#define TRIGBITS 14
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#define cPI3_8 6270
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#define cPI2_8 11585
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#define cPI1_8 15137
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#define FLOAT_CONV(x) ((int)((x)*(1<<TRIGBITS)+.5))
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#define MULT_NORM(x) ((x)>>TRIGBITS)
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#define HALVE(x) ((x)>>1)
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#else
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#define DATA_TYPE float
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#define REG_TYPE float
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#define cPI3_8 .38268343236508977175F
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#define cPI2_8 .70710678118654752441F
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#define cPI1_8 .92387953251128675613F
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#define FLOAT_CONV(x) (x)
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#define MULT_NORM(x) (x)
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#define HALVE(x) ((x)*.5f)
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#endif
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typedef struct {
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int n;
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int log2n;
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DATA_TYPE *trig;
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int *bitrev;
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DATA_TYPE scale;
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} mdct_lookup;
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extern void mdct_init(mdct_lookup *lookup,int n);
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extern void mdct_clear(mdct_lookup *l);
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extern void mdct_forward(mdct_lookup *init, DATA_TYPE *in, DATA_TYPE *out);
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extern void mdct_backward(mdct_lookup *init, DATA_TYPE *in, DATA_TYPE *out);
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#endif
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