media/libtremor/lib/mdct.h@b8a032363ba2
media/libtremor/lib/mdct.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
1 /********************************************************************
2 * *
3 * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
4 * *
5 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
6 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
7 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
8 * *
9 * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
10 * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
11 * *
12 ********************************************************************
14 function: modified discrete cosine transform prototypes
16 ********************************************************************/
18 #ifndef _OGG_mdct_H_
19 #define _OGG_mdct_H_
21 #include "ivorbiscodec.h"
22 #include "misc.h"
24 #define DATA_TYPE ogg_int32_t
25 #define REG_TYPE register ogg_int32_t
27 #ifdef _LOW_ACCURACY_
28 #define cPI3_8 (0x0062)
29 #define cPI2_8 (0x00b5)
30 #define cPI1_8 (0x00ed)
31 #else
32 #define cPI3_8 (0x30fbc54d)
33 #define cPI2_8 (0x5a82799a)
34 #define cPI1_8 (0x7641af3d)
35 #endif
37 extern void mdct_forward(int n, DATA_TYPE *in, DATA_TYPE *out);
38 extern void mdct_backward(int n, DATA_TYPE *in, DATA_TYPE *out);
40 #endif
