The Tor Browser / file comparison
comparison: media/libvorbis/lib/mdct.h
media/libvorbis/lib/mdct.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:af2aecf352d2 |
|---|---|
| 1 /******************************************************************** | |
| 2 * * | |
| 3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * | |
| 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * | |
| 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * | |
| 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * | |
| 7 * * | |
| 8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 * | |
| 9 * by the Xiph.Org Foundation http://www.xiph.org/ * | |
| 10 * * | |
| 11 ******************************************************************** | |
| 12 | |
| 13 function: modified discrete cosine transform prototypes | |
| 14 last mod: $Id: mdct.h 16227 2009-07-08 06:58:46Z xiphmont $ | |
| 15 | |
| 16 ********************************************************************/ | |
| 17 | |
| 18 #ifndef _OGG_mdct_H_ | |
| 19 #define _OGG_mdct_H_ | |
| 20 | |
| 21 #include "vorbis/codec.h" | |
| 22 | |
| 23 | |
| 24 | |
| 25 | |
| 26 | |
| 27 /*#define MDCT_INTEGERIZED <- be warned there could be some hurt left here*/ | |
| 28 #ifdef MDCT_INTEGERIZED | |
| 29 | |
| 30 #define DATA_TYPE int | |
| 31 #define REG_TYPE register int | |
| 32 #define TRIGBITS 14 | |
| 33 #define cPI3_8 6270 | |
| 34 #define cPI2_8 11585 | |
| 35 #define cPI1_8 15137 | |
| 36 | |
| 37 #define FLOAT_CONV(x) ((int)((x)*(1<<TRIGBITS)+.5)) | |
| 38 #define MULT_NORM(x) ((x)>>TRIGBITS) | |
| 39 #define HALVE(x) ((x)>>1) | |
| 40 | |
| 41 #else | |
| 42 | |
| 43 #define DATA_TYPE float | |
| 44 #define REG_TYPE float | |
| 45 #define cPI3_8 .38268343236508977175F | |
| 46 #define cPI2_8 .70710678118654752441F | |
| 47 #define cPI1_8 .92387953251128675613F | |
| 48 | |
| 49 #define FLOAT_CONV(x) (x) | |
| 50 #define MULT_NORM(x) (x) | |
| 51 #define HALVE(x) ((x)*.5f) | |
| 52 | |
| 53 #endif | |
| 54 | |
| 55 | |
| 56 typedef struct { | |
| 57 int n; | |
| 58 int log2n; | |
| 59 | |
| 60 DATA_TYPE *trig; | |
| 61 int *bitrev; | |
| 62 | |
| 63 DATA_TYPE scale; | |
| 64 } mdct_lookup; | |
| 65 | |
| 66 extern void mdct_init(mdct_lookup *lookup,int n); | |
| 67 extern void mdct_clear(mdct_lookup *l); | |
| 68 extern void mdct_forward(mdct_lookup *init, DATA_TYPE *in, DATA_TYPE *out); | |
| 69 extern void mdct_backward(mdct_lookup *init, DATA_TYPE *in, DATA_TYPE *out); | |
| 70 | |
| 71 #endif |
