libvoipcodecs 0.0.1
iLBC_define.h
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1/*
2 * iLBC - a library for the iLBC codec
3 *
4 * iLBC_define.h - The head guy amongst the headers
5 *
6 * Adapted by Steve Underwood <steveu@coppice.org> from the reference
7 * iLBC code supplied in RFC3951.
8 *
9 * Original code Copyright (C) The Internet Society (2004).
10 * All changes to produce this version Copyright (C) 2008 by Steve Underwood
11 * All Rights Reserved.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16 *
17 * $Id: iLBC_define.h,v 1.2 2008/03/06 12:27:38 steveu Exp $
18 */
19
20/*! \file */
21
22#if !defined(_ILBC_DEFINE_H_)
23#define _ILBC_DEFINE_H_
24
25#include <string.h>
26
27#define FS 8000.0f
28#define NSUB_20MS 4
29#define NSUB_30MS 6
30#define NASUB_20MS 2
31
32
33#define NASUB_30MS 4
34#define NASUB_MAX 4
35#define SUBL 40
36#define STATE_LEN 80
37#define STATE_SHORT_LEN_30MS 58
38#define STATE_SHORT_LEN_20MS 57
39
40/* LPC settings */
41
42#define ILBC_LPC_FILTERORDER 10
43#define LPC_CHIRP_SYNTDENUM 0.9025f
44#define LPC_CHIRP_WEIGHTDENUM 0.4222f
45#define LPC_LOOKBACK 60
46#define LPC_N_20MS 1
47#define LPC_N_30MS 2
48#define LPC_N_MAX 2
49#define LPC_ASYMDIFF 20
50#define LPC_BW 60.0f
51#define LPC_WN 1.0001f
52#define LSF_NSPLIT 3
53#define LSF_NUMBER_OF_STEPS 4
54#define LPC_HALFORDER (ILBC_LPC_FILTERORDER/2)
55
56/* cb settings */
57
58#define CB_NSTAGES 3
59#define CB_EXPAND 2
60#define CB_MEML 147
61#define CB_FILTERLEN 2*4
62#define CB_HALFFILTERLEN 4
63#define CB_RESRANGE 34
64#define CB_MAXGAIN 1.3f
65
66/* enhancer */
67
68#define ENH_BLOCKL 80 /* block length */
69#define ENH_BLOCKL_HALF (ENH_BLOCKL/2)
70#define ENH_HL 3 /* 2*ENH_HL+1 is number blocks in said second sequence */
71#define ENH_SLOP 2 /* max difference estimated and correct pitch period */
72#define ENH_PLOCSL 20 /* pitch-estimates and pitch-locations buffer length */
73#define ENH_OVERHANG 2
74#define ENH_UPS0 4 /* upsampling rate */
75#define ENH_FL0 3 /* 2*FLO+1 is the length of each filter */
76#define ENH_VECTL (ENH_BLOCKL + 2*ENH_FL0)
77
78#define ENH_CORRDIM (2*ENH_SLOP + 1)
79#define ENH_NBLOCKS (ILBC_BLOCK_LEN_MAX/ENH_BLOCKL)
80#define ENH_NBLOCKS_EXTRA 5
81#define ENH_NBLOCKS_TOT 8 /* ENH_NBLOCKS + ENH_NBLOCKS_EXTRA */
82#define ENH_BUFL (ENH_NBLOCKS_TOT*ENH_BLOCKL)
83#define ENH_ALPHA0 0.05f
84
85/* Down sampling */
86
87#define FILTERORDER_DS 7
88#define DELAY_DS 3
89#define FACTOR_DS 2
90
91/* bit stream defs */
92
93#define STATE_BITS 3
94#define BYTE_LEN 8
95
96/* help parameters */
97
98#define FLOAT_MAX 1.0e37f
99#define EPS 2.220446049250313e-016f
100#define PI 3.14159265358979323846f
101#define MIN_SAMPLE -32768
102#define MAX_SAMPLE 32767
103#define TWO_PI 6.283185307f
104#define PI2 0.159154943f
105
106#endif
107/*- End of file ------------------------------------------------------------*/