media/libvorbis/lib/mdct.h@97036ab72558
media/libvorbis/lib/mdct.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
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 ********************************************************************
13 function: modified discrete cosine transform prototypes
14 last mod: $Id: mdct.h 16227 2009-07-08 06:58:46Z xiphmont $
16 ********************************************************************/
18 #ifndef _OGG_mdct_H_
19 #define _OGG_mdct_H_
21 #include "vorbis/codec.h"
27 /*#define MDCT_INTEGERIZED <- be warned there could be some hurt left here*/
28 #ifdef MDCT_INTEGERIZED
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
37 #define FLOAT_CONV(x) ((int)((x)*(1<<TRIGBITS)+.5))
38 #define MULT_NORM(x) ((x)>>TRIGBITS)
39 #define HALVE(x) ((x)>>1)
41 #else
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
49 #define FLOAT_CONV(x) (x)
50 #define MULT_NORM(x) (x)
51 #define HALVE(x) ((x)*.5f)
53 #endif
56 typedef struct {
57 int n;
58 int log2n;
60 DATA_TYPE *trig;
61 int *bitrev;
63 DATA_TYPE scale;
64 } mdct_lookup;
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);
71 #endif
