spandsp  1.99.0
v29tx_constellation_maps.h
1 /*
2  * SpanDSP - a series of DSP components for telephony
3  *
4  * v29tx_constellation_maps.h - ITU V.29 modem transmit part.
5  * Constellation mapping.
6  *
7  * Written by Steve Underwood <steveu@coppice.org>
8  *
9  * Copyright (C) 2008, 2012 Steve Underwood
10  *
11  * All rights reserved.
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU Lesser General Public License version 2.1,
15  * as published by the Free Software Foundation.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20  * GNU Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with this program; if not, write to the Free Software
24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25  */
26 
27 #if defined(SPANDSP_USE_FIXED_POINT)
28 static const complexi16_t v29_abab_constellation[6] =
29 #else
30 static const complexf_t v29_abab_constellation[6] =
31 #endif
32 {
33  {FP_CONSTELLATION_SCALE( 3.0f), FP_CONSTELLATION_SCALE(-3.0f)}, /* 315deg high 9600 */
34  {FP_CONSTELLATION_SCALE(-3.0f), FP_CONSTELLATION_SCALE( 0.0f)}, /* 180deg low */
35  {FP_CONSTELLATION_SCALE( 1.0f), FP_CONSTELLATION_SCALE(-1.0f)}, /* 315deg low 7200 */
36  {FP_CONSTELLATION_SCALE(-3.0f), FP_CONSTELLATION_SCALE( 0.0f)}, /* 180deg low */
37  {FP_CONSTELLATION_SCALE( 0.0f), FP_CONSTELLATION_SCALE(-3.0f)}, /* 270deg low 4800 */
38  {FP_CONSTELLATION_SCALE(-3.0f), FP_CONSTELLATION_SCALE( 0.0f)} /* 180deg low */
39 };
40 
41 #if defined(SPANDSP_USE_FIXED_POINT)
42 static const complexi16_t v29_cdcd_constellation[6] =
43 #else
44 static const complexf_t v29_cdcd_constellation[6] =
45 #endif
46 {
47  {FP_CONSTELLATION_SCALE( 3.0f), FP_CONSTELLATION_SCALE( 0.0f)}, /* 0deg low 9600 */
48  {FP_CONSTELLATION_SCALE(-3.0f), FP_CONSTELLATION_SCALE( 3.0f)}, /* 135deg high */
49  {FP_CONSTELLATION_SCALE( 3.0f), FP_CONSTELLATION_SCALE( 0.0f)}, /* 0deg low 7200 */
50  {FP_CONSTELLATION_SCALE(-1.0f), FP_CONSTELLATION_SCALE( 1.0f)}, /* 135deg low */
51  {FP_CONSTELLATION_SCALE( 3.0f), FP_CONSTELLATION_SCALE( 0.0f)}, /* 0deg low 4800 */
52  {FP_CONSTELLATION_SCALE( 0.0f), FP_CONSTELLATION_SCALE( 3.0f)} /* 90deg low */
53 };
54 
55 #if defined(SPANDSP_USE_FIXED_POINT)
56 static const complexi16_t v29_9600_constellation[16] =
57 #else
58 static const complexf_t v29_9600_constellation[16] =
59 #endif
60 {
61  {FP_CONSTELLATION_SCALE( 3.0f), FP_CONSTELLATION_SCALE( 0.0f)}, /* 0deg low */
62  {FP_CONSTELLATION_SCALE( 1.0f), FP_CONSTELLATION_SCALE( 1.0f)}, /* 45deg low */
63  {FP_CONSTELLATION_SCALE( 0.0f), FP_CONSTELLATION_SCALE( 3.0f)}, /* 90deg low */
64  {FP_CONSTELLATION_SCALE(-1.0f), FP_CONSTELLATION_SCALE( 1.0f)}, /* 135deg low */
65  {FP_CONSTELLATION_SCALE(-3.0f), FP_CONSTELLATION_SCALE( 0.0f)}, /* 180deg low */
66  {FP_CONSTELLATION_SCALE(-1.0f), FP_CONSTELLATION_SCALE(-1.0f)}, /* 225deg low */
67  {FP_CONSTELLATION_SCALE( 0.0f), FP_CONSTELLATION_SCALE(-3.0f)}, /* 270deg low */
68  {FP_CONSTELLATION_SCALE( 1.0f), FP_CONSTELLATION_SCALE(-1.0f)}, /* 315deg low */
69  {FP_CONSTELLATION_SCALE( 5.0f), FP_CONSTELLATION_SCALE( 0.0f)}, /* 0deg high */
70  {FP_CONSTELLATION_SCALE( 3.0f), FP_CONSTELLATION_SCALE( 3.0f)}, /* 45deg high */
71  {FP_CONSTELLATION_SCALE( 0.0f), FP_CONSTELLATION_SCALE( 5.0f)}, /* 90deg high */
72  {FP_CONSTELLATION_SCALE(-3.0f), FP_CONSTELLATION_SCALE( 3.0f)}, /* 135deg high */
73  {FP_CONSTELLATION_SCALE(-5.0f), FP_CONSTELLATION_SCALE( 0.0f)}, /* 180deg high */
74  {FP_CONSTELLATION_SCALE(-3.0f), FP_CONSTELLATION_SCALE(-3.0f)}, /* 225deg high */
75  {FP_CONSTELLATION_SCALE( 0.0f), FP_CONSTELLATION_SCALE(-5.0f)}, /* 270deg high */
76  {FP_CONSTELLATION_SCALE( 3.0f), FP_CONSTELLATION_SCALE(-3.0f)} /* 315deg high */
77 };
78 
79 /*- End of file ------------------------------------------------------------*/
Definition: complex.h:88
Definition: complex.h:42