Mercurial > hg > audiostuff
view spandsp-0.0.3/spandsp-0.0.3/tests/make_line_models.c @ 5:f762bf195c4b
import spandsp-0.0.3
| author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
|---|---|
| date | Fri, 25 Jun 2010 16:00:21 +0200 |
| parents | |
| children |
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/* * SpanDSP - a series of DSP components for telephony * * make_line_models.c * * Written by Steve Underwood <steveu@coppice.org> * * Copyright (C) 2004 Steve Underwood * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2, as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Id: make_line_models.c,v 1.19 2006/11/23 15:48:09 steveu Exp $ */ /*! \page make_line_models_page Telephony line model construction \section make_line_models_page_sec_1 What does it do? ???. \section make_line_models_page_sec_2 How does it work? ???. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <inttypes.h> #include <string.h> #include <stdio.h> #include <stdlib.h> #if defined(HAVE_FFTW3_H) #include <fftw3.h> #else #include <fftw.h> #endif #if defined(HAVE_TGMATH_H) #include <tgmath.h> #endif #if defined(HAVE_MATH_H) #include <math.h> #endif #include <tiffio.h> #include "spandsp.h" #if !defined(M_PI) # define M_PI 3.14159265358979323846 /* pi */ #endif #define SAMPLE_RATE 8000 #define LINE_FILTER_SIZE 129 #define FFT_SIZE 1024 /* Tabulated medium range telephone line response (from p 537, Digital Communication, John G. Proakis */ /* amp 1.0 -> 2.15, freq = 3000 Hz -> 3.2, by 0.2 increments delay = 4 ms -> 2.2 */ struct { int frequency; float amp; float delay; } proakis[] = { { 0, 0.00, 4.80}, { 200, 0.90, 3.50}, { 400, 1.40, 2.20}, { 600, 1.80, 0.90}, { 800, 2.00, 0.50}, {1000, 2.10, 0.25}, {1200, 2.30, 0.10}, {1400, 2.30, 0.05}, {1600, 2.20, 0.00}, {1800, 2.10, 0.00}, {2000, 2.00, 0.00}, {2200, 1.85, 0.05}, {2400, 1.75, 0.10}, {2600, 1.55, 0.20}, {2800, 1.30, 0.40}, {3000, 1.10, 0.50}, {3200, 0.80, 0.90}, {3400, 0.55, 1.20}, {3600, 0.25, 2.20}, {3800, 0.05, 3.20}, {4000, 0.05, 4.20}, {4200, 0.05, 5.20} }; #define CPE_TO_CO_ATTENUATION 0 /* In dB */ #define CPE_TO_CO_DELAY 1 /* In us */ #define CPE_TO_CO_IMPEDANCE 2 /* In ohms */ #define CPE_TO_CO_PHASE 3 /* In degrees */ #define CO_TO_CPE_IMPEDANCE 4 /* In ohms */ #define CO_TO_CPE_PHASE 5 /* In degrees */ #define CO_TO_CPE_ATTENUATION 6 /* In dB */ #define CO_TO_CPE_DELAY 7 /* In us */ /* Terms used, for V.56bis: AD = attenuation distortion EDD = envelope delay distortion */ /* V.56bis EIA LL-1, non-loaded loop */ struct { int freq; float ad[8]; } eia_ll1[] = { { 200, {0.0, 0.4, 767, -1.4, 767, -1.4, 0.0, 0.4}}, { 300, {0.0, 0.7, 766, -2.0, 766, -2.0, 0.0, 0.7}}, { 400, {0.0, 0.5, 763, -2.8, 763, -2.8, 0.0, 0.5}}, { 500, {0.0, 0.6, 765, -3.4, 765, -3.4, 0.0, 0.6}}, { 600, {0.0, 0.2, 764, -4.1, 764, -4.1, 0.0, 0.2}}, { 700, {0.0, 0.4, 764, -4.7, 764, -4.7, 0.0, 0.4}}, { 800, {0.0, 0.4, 762, -5.4, 762, -5.4, 0.0, 0.4}}, { 900, {0.0, 0.2, 762, -6.0, 762, -6.0, 0.0, 0.2}}, {1000, {1.2, 0.5, 761, -6.7, 761, -6.7, 1.2, 0.5}}, {1100, {0.0, 0.6, 759, -7.4, 759, -7.4, 0.0, 0.6}}, {1200, {0.0, 0.4, 757, -8.1, 757, -8.1, 0.0, 0.4}}, {1300, {0.0, 0.1, 757, -8.6, 757, -8.6, 0.0, 0.1}}, {1400, {0.0, 0.3, 755, -9.3, 755, -9.3, 0.0, 0.3}}, {1500, {0.0, 0.4, 753, -10.0, 753, -10.0, 0.0, 0.4}}, {1600, {0.0, 0.3, 751, -10.7, 751, -10.7, 0.0, 0.3}}, {1700, {0.0, 0.1, 748, -11.3, 748, -11.3, 0.0, 0.1}}, {1800, {0.0, 11.0, 748, -11.9, 748, -11.9, 0.0, 11.0}}, {1900, {0.1, 0.1, 745, -12.5, 745, -12.5, 0.1, 0.1}}, {2000, {0.1, 0.3, 743, -13.9, 743, -13.9, 0.1, 0.3}}, {2100, {0.1, 0.3, 740, -13.9, 740, -13.9, 0.1, 0.3}}, {2200, {0.1, 0.3, 737, -14.5, 737, -14.5, 0.1, 0.3}}, {2300, {0.1, 0.3, 734, -15.2, 734, -15.2, 0.1, 0.3}}, {2400, {0.1, 0.2, 731, -15.8, 731, -15.8, 0.1, 0.2}}, {2500, {0.1, 0.0, 728, -16.4, 728, -16.4, 0.1, 0.0}}, {2600, {0.1, 0.0, 729, -16.8, 729, -16.8, 0.1, 0.0}}, {2700, {0.2, 0.1, 726, -17.4, 726, -17.4, 0.2, 0.1}}, {2800, {0.2, 0.2, 722, -18.0, 722, -18.0, 0.2, 0.2}}, {2900, {0.2, 0.3, 719, -18.6, 719, -18.6, 0.2, 0.3}}, {3000, {0.2, 0.4, 715, -19.3, 715, -19.3, 0.2, 0.4}}, {3100, {0.2, 0.4, 712, -19.9, 712, -19.9, 0.2, 0.4}}, {3200, {0.2, 0.5, 708, -20.5, 708, -20.5, 0.2, 0.5}}, {3300, {0.2, 0.5, 704, -21.1, 704, -21.1, 0.2, 0.5}}, {3400, {0.2, 0.5, 700, -21.7, 700, -21.7, 0.2, 0.5}}, {3500, {0.2, 0.5, 696, -22.3, 696, -22.3, 0.2, 0.5}}, {3600, {0.2, 0.4, 692, -22.9, 692, -22.9, 0.2, 0.4}}, {3700, {0.2, 0.3, 688, -23.5, 688, -23.5, 0.2, 0.3}}, {3800, {0.2, 0.2, 684, -24.1, 684, -24.1, 0.2, 0.2}}, {3900, {0.2, 0.1, 680, -24.7, 680, -24.7, 0.2, 0.1}}, {4000, {0.2, -0.1, 676, -25.2, 676, -25.2, 0.2, -0.1}} }; /* V.56bis EIA LL-2, non-loaded loop */ struct { int freq; float ad[8]; } eia_ll2[] = { { 200, {-0.2, 6.6, 1086, -4.9, 1085, -5.6, -0.2, 6.6}}, { 300, {-0.2, 7.7, 1079, -7.3, 1077, -8.3, -0.2, 7.7}}, { 400, {-0.2, 6.7, 1062, -9.9, 1058, -11.2, -0.2, 6.7}}, { 500, {-0.2, 7.1, 1059, -12.0, 1053, -13.6, -0.2, 7.1}}, { 600, {-0.1, 5.2, 1041, -14.4, 1034, -16.3, -0.1, 5.2}}, { 700, {-0.1, 5.8, 1030, -16.5, 1020, -18.6, -0.1, 5.8}}, { 800, {-0.1, 5.4, 1010, -18.7, 998, -21.0, -0.1, 5.4}}, { 900, { 0.0, 4.5, 997, -20.5, 982, -23.1, 0.0, 4.5}}, {1000, { 3.2, 5.1, 976, -22.5, 959, -25.3, 3.2, 5.1}}, {1100, { 0.1, 5.0, 954, -24.5, 934, -27.4, 0.1, 5.0}}, {1200, { 0.1, 4.0, 931, -26.2, 909, -29.4, 0.1, 4.0}}, {1300, { 0.2, 2.7, 918, -27.6, 894, -30.9, 0.2, 2.7}}, {1400, { 0.2, 2.8, 897, -29.2, 871, -32.6, 0.2, 2.8}}, {1500, { 0.3, 2.6, 874, -30.7, 847, -34.3, 0.3, 2.6}}, {1600, { 0.3, 2.0, 852, -32.1, 823, -35.8, 0.3, 2.0}}, {1700, { 0.4, 0.9, 831, -33.4, 800, -37.2, 0.4, 0.9}}, {1800, { 0.5, 40.8, 816, -34.4, 783, -38.4, 0.5, 40.8}}, {1900, { 0.6, 0.0, 796, -35.6, 762, -39.6, 0.6, 0.0}}, {2000, { 0.6, -0.2, 776, -36.6, 741, -40.7, 0.6, -0.2}}, {2100, { 0.7, -0.6, 756, -37.6, 720, -41.8, 0.7, -0.6}}, {2200, { 0.8, -1.1, 737, -38.6, 700, -42.9, 0.8, -1.1}}, {2300, { 0.9, -1.8, 719, -39.4, 681, -43.8, 0.9, -1.8}}, {2400, { 1.0, -2.6, 701, -40.2, 663, -44.7, 1.0, -2.6}}, {2500, { 1.0, -3.7, 684, -41.0, 646, -45.5, 1.0, -3.7}}, {2600, { 1.1, -4.1, 678, -41.3, 639, -45.9, 1.1, -4.1}}, {2700, { 1.2, -4.3, 663, -42.0, 623, -46.6, 1.2, -4.3}}, {2800, { 1.3, -4.5, 647, -42.6, 607, -47.3, 1.3, -4.5}}, {2900, { 1.4, -4.8, 632, -43.1, 591, -47.9, 1.4, -4.8}}, {3000, { 1.5, -5.2, 617, -43.6, 576, -48.4, 1.5, -5.2}}, {3100, { 1.6, -5.6, 603, -44.1, 562, -49.0, 1.6, -5.6}}, {3200, { 1.7, -6.0, 589, -44.5, 548, -49.5, 1.7, -6.0}}, {3300, { 1.8, -6.5, 576, -44.9, 535, -49.9, 1.8, -6.5}}, {3400, { 1.9, -7.1, 563, -45.3, 522, -50.3, 1.9, -7.1}}, {3500, { 2.0, -7.7, 551, -45.6, 509, -50.7, 2.0, -7.7}}, {3600, { 2.1, -8.4, 539, -45.9, 498, -51.0, 2.1, -8.4}}, {3700, { 2.2, -9.1, 528, -46.2, 486, -51.3, 2.2, -9.1}}, {3800, { 2.3, -9.9, 518, -46.4, 476, -51.6, 2.3, -9.9}}, {3900, { 2.4, -10.6, 507, -46.6, 466, -51.9, 2.4, -10.6}}, {4000, { 2.5, -11.5, 498, -46.8, 456, -52.1, 2.5, -11.5}} }; /* V.56bis EIA LL-3, non-loaded loop */ struct { int freq; float ad[8]; } eia_ll3[] = { { 200, {-0.3, 10.5, 1176, -5.9, 1173, -7.4, -0.3, 10.5}}, { 300, {-0.3, 11.5, 1165, -8.8, 1159, -11.0, -0.3, 11.5}}, { 400, {-0.3, 10.6, 1140, -11.8, 1130, -14.7, -0.3, 10.6}}, { 500, {-0.3, 11.0, 1133, -14.3, 1117, -17.8, -0.3, 11.0}}, { 600, {-0.2, 8.5, 1108, -17.1, 1086, -21.2, -0.2, 8.5}}, { 700, {-0.2, 8.5, 1090, -19.4, 1062, -24.0, -0.2, 8.5}}, { 800, {-0.1, 8.4, 1062, -21.9, 1029, -27.0, -0.1, 8.4}}, { 900, { 0.0, 7.1, 1042, -23.9, 1003, -29.4, 0.0, 7.1}}, {1000, { 3.8, 7.7, 1013, -23.0, 969, -31.9, 3.8, 7.7}}, {1100, { 0.1, 7.4, 982, -28.1, 934, -34.3, 0.1, 7.4}}, {1200, { 0.1, 6.0, 953, -29.9, 900, -36.5, 0.1, 6.0}}, {1300, { 0.2, 4.2, 935, -31.3, 878, -38.1, 0.2, 4.2}}, {1400, { 0.3, 4.2, 907, -32.8, 847, -40.0, 0.3, 4.2}}, {1500, { 0.4, 3.7, 880, -34.3, 817, -41.7, 0.4, 3.7}}, {1600, { 0.5, 2.7, 853, -35.6, 787, -43.2, 0.5, 2.7}}, {1700, { 0.6, 1.2, 827, -36.8, 760, -44.6, 0.6, 1.2}}, {1800, { 0.7, 48.7, 809, -37.8, 739, -45.8, 0.7, 48.7}}, {1900, { 0.8, -0.2, 785, -38.8, 715, -47.0, 0.8, -0.2}}, {2000, { 0.9, -0.7, 763, -39.7, 691, -48.0, 0.9, -0.7}}, {2100, { 1.0, -1.3, 741, -40.5, 668, -49.1, 1.0, -1.3}}, {2200, { 1.1, -2.1, 719, -41.3, 647, -50.0, 1.1, -2.1}}, {2300, { 1.2, -2.1, 699, -42.0, 625, -50.8, 1.2, -2.1}}, {2400, { 1.2, -4.3, 680, -42.6, 606, -51.6, 1.2, -4.3}}, {2500, { 1.3, -5.6, 663, -43.2, 588, -52.3, 1.3, -5.6}}, {2600, { 1.6, -6.2, 656, -43.4, 581, -52.7, 1.6, -6.2}}, {2700, { 1.7, -6.6, 640, -43.9, 564, -53.3, 1.7, -6.6}}, {2800, { 1.8, -7.0, 624, -44.3, 548, -53.9, 1.8, -7.0}}, {2900, { 1.9, -7.5, 609, -44.7, 533, -54.4, 1.9, -7.5}}, {3000, { 2.0, -8.0, 594, -45.0, 518, -54.8, 2.0, -8.0}}, {3100, { 2.2, -8.6, 580, -45.3, 504, -55.3, 2.2, -8.6}}, {3200, { 2.3, -9.2, 566, -45.6, 490, -55.7, 2.3, -9.2}}, {3300, { 2.4, -9.9, 553, -45.8, 477, -56.0, 2.4, -9.9}}, {3400, { 2.6, -10.7, 540, -46.0, 465, -56.3, 2.6, -10.7}}, {3500, { 2.7, -11.4, 529, -46.2, 454, -56.6, 2.7, -11.4}}, {3600, { 2.8, -12.3, 517, -46.3, 443, -56.9, 2.8, -12.3}}, {3700, { 3.0, -13.1, 507, -46.4, 432, -57.1, 3.0, -13.1}}, {3800, { 3.1, -14.0, 497, -46.5, 422, -57.3, 3.1, -14.0}}, {3900, { 3.2, -14.9, 487, -46.6, 413, -57.5, 3.2, -14.9}}, {4000, { 3.3, -15.9, 478, -46.6, 404, -57.7, 3.3, -15.9}} }; /* V.56bis EIA LL-4, non-loaded loop */ struct { int freq; float ad[8]; } eia_ll4[] = { { 200, {-0.8, 31.0, 1564, -10.7, 1564, -10.7, -0.8, 31.0}}, { 300, {-0.8, 32.6, 1520, -15.6, 1520, -15.6, -0.8, 32.6}}, { 400, {-0.8, 29.8, 1447, -20.5, 1447, -20.5, -0.8, 29.8}}, { 500, {-0.6, 29.7, 1402, -24.3, 1402, -24.3, -0.6, 29.7}}, { 600, {-0.5, 24.9, 1328, -28.1, 1328, -28.1, -0.5, 24.9}}, { 700, {-0.4, 24.8, 1270, -31.2, 1270, -31.2, -0.4, 24.8}}, { 800, {-0.3, 22.7, 1200, -34.0, 1200, -34.0, -0.3, 22.7}}, { 900, {-0.1, 19.8, 1148, -36.2, 1148, -36.2, -0.1, 19.8}}, {1000, { 6.1, 19.3, 1086, -38.3, 1086, -38.3, 6.1, 19.3}}, {1100, { 0.1, 17.5, 1027, -40.1, 1027, -40.1, 0.1, 17.5}}, {1200, { 0.3, 14.3, 974, -41.6, 974, -41.6, 0.3, 14.3}}, {1300, { 0.5, 10.9, 941, -42.6, 941, -42.6, 0.5, 10.9}}, {1400, { 0.7, 9.6, 897, -43.7, 897, -43.7, 0.7, 9.6}}, {1500, { 0.9, 7.7, 856, -44.6, 856, -44.6, 0.9, 7.7}}, {1600, { 1.1, 5.3, 818, -45.3, 818, -45.3, 1.1, 5.3}}, {1700, { 1.3, 2.4, 784, -45.9, 784, -45.9, 1.3, 2.4}}, {1800, { 1.4, 69.1, 761, -46.3, 761, -46.3, 1.4, 69.1}}, {1900, { 1.7, -1.3, 732, -46.6, 732, -46.6, 1.7, -1.3}}, {2000, { 1.9, -2.7, 706, -46.9, 706, -46.9, 1.9, -2.7}}, {2100, { 2.1, -4.3, 682, -47.1, 682, -47.1, 2.1, -4.3}}, {2200, { 2.3, -6.0, 659, -47.3, 659, -47.3, 2.3, -6.0}}, {2300, { 2.5, -7.9, 638, -47.4, 638, -47.4, 2.5, -7.9}}, {2400, { 2.7, -9.9, 619, -47.4, 619, -47.4, 2.7, -9.9}}, {2500, { 2.9, -12.0, 602, -47.5, 602, -47.5, 2.9, -12.0}}, {2600, { 3.1, -13.0, 596, -47.4, 596, -47.4, 3.1, -13.0}}, {2700, { 3.3, -13.9, 580, -47.4, 580, -47.4, 3.3, -13.9}}, {2800, { 3.5, -14.8, 566, -47.3, 566, -47.3, 3.5, -14.8}}, {2900, { 3.7, -15.7, 552, -47.2, 552, -47.2, 3.7, -15.7}}, {3000, { 3.9, -16.7, 539, -47.1, 539, -47.1, 3.9, -16.7}}, {3100, { 4.1, -17.7, 526, -47.0, 526, -47.0, 4.1, -17.7}}, {3200, { 4.3, -18.7, 515, -46.8, 515, -46.8, 4.3, -18.7}}, {3300, { 4.5, -19.8, 504, -46.7, 504, -46.7, 4.5, -19.8}}, {3400, { 4.7, -20.8, 493, -46.5, 493, -46.5, 4.7, -20.8}}, {3500, { 4.9, -21.8, 484, -46.4, 484, -46.4, 4.9, -21.8}}, {3600, { 5.1, -22.9, 475, -46.2, 475, -46.2, 5.1, -22.9}}, {3700, { 5.3, -23.9, 466, -46.0, 466, -46.0, 5.3, -23.9}}, {3800, { 5.5, -25.0, 458, -45.9, 458, -45.9, 5.5, -25.0}}, {3900, { 5.6, -26.1, 451, -45.7, 451, -45.7, 5.6, -26.1}}, {4000, { 5.8, -27.2, 444, -45.5, 444, -45.5, 5.8, -27.2}} }; /* V.56bis EIA LL-5, non-loaded loop */ struct { int freq; float ad[8]; } eia_ll5[] = { { 200, {-1.4, 55.8, 1607, -12.7, 1574, -17.4, -1.4, 55.8}}, { 300, {-1.3, 57.2, 1541, -18.3, 1478, -24.8, -1.3, 57.2}}, { 400, {-1.2, 52.2, 1443, -23.6, 1350, -31.5, -1.2, 52.2}}, { 500, {-1.0, 51.0, 1379, -27.5, 1261, -36.4, -1.0, 51.0}}, { 600, {-0.9, 43.2, 1287, -31.2, 1150, -40.7, -0.9, 43.2}}, { 700, {-0.7, 41.8, 1216, -34.0, 1066, -44.0, -0.7, 41.8}}, { 800, {-0.5, 37.4, 1137, -36.5, 979, -46.9, -0.5, 37.4}}, { 900, {-0.2, 32.4, 1080, -38.3, 915, -48.9, -0.2, 32.4}}, {1000, { 7.0, 30.5, 1015, -39.8, 848, -50.7, 7.0, 30.5}}, {1100, { 0.3, 26.8, 956, -41.1, 788, -52.2, 0.3, 26.8}}, {1200, { 0.5, 21.5, 904, -42.1, 736, -53.3, 0.5, 21.5}}, {1300, { 0.8, 16.6, 873, -42.7, 703, -54.1, 0.8, 16.6}}, {1400, { 1.0, 14.1, 832, -43.2, 663, -54.8, 1.0, 14.1}}, {1500, { 1.3, 10.9, 795, -43.7, 627, -55.3, 1.3, 10.9}}, {1600, { 1.6, 7.3, 762, -44.0, 595, -55.7, 1.6, 7.3}}, {1700, { 1.9, 3.2, 733, -44.2, 567, -56.0, 1.9, 3.2}}, {1800, { 2.2, 81.5, 713, -44.3, 547, -56.2, 2.2, 81.5}}, {1900, { 2.4, -1.9, 689, -44.4, 524, -56.4, 2.4, -1.9}}, {2000, { 2.7, -3.9, 667, -44.4, 503, -56.5, 2.7, -3.9}}, {2100, { 3.0, -6.1, 646, -44.4, 485, -56.5, 3.0, -6.1}}, {2200, { 3.3, -8.3, 628, -44.4, 466, -56.5, 3.3, -8.3}}, {2300, { 3.6, -10.7, 610, -44.3, 450, -56.5, 3.6, -10.7}}, {2400, { 3.8, -13.1, 595, -44.2, 436, -56.4, 3.8, -13.1}}, {2500, { 4.1, -15.5, 581, -44.1, 422, -56.3, 4.1, -15.5}}, {2600, { 4.3, -16.7, 577, -44.0, 417, -56.2, 4.3, -16.7}}, {2700, { 4.6, -17.7, 565, -43.9, 406, -56.1, 4.6, -17.7}}, {2800, { 4.8, -18.8, 553, -43.8, 395, -56.0, 4.8, -18.8}}, {2900, { 5.1, -19.9, 542, -43.7, 395, -55.9, 5.1, -19.9}}, {3000, { 5.4, -21.0, 531, -43.6, 375, -55.7, 5.4, -21.0}}, {3100, { 5.6, -22.1, 521, -43.5, 366, -55.6, 5.6, -22.1}}, {3200, { 5.9, -23.2, 511, -43.4, 357, -55.4, 5.9, -23.2}}, {3300, { 6.1, -24.3, 502, -43.3, 349, -55.3, 6.1, -24.3}}, {3400, { 6.4, -25.4, 494, -43.2, 341, -55.1, 6.4, -25.4}}, {3500, { 6.6, -26.5, 486, -43.1, 334, -55.0, 6.6, -26.5}}, {3600, { 6.9, -27.6, 478, -43.0, 327, -54.8, 6.9, -27.6}}, {3700, { 7.1, -28.7, 471, -42.9, 321, -54.7, 7.1, -28.7}}, {3800, { 7.3, -29.9, 464, -42.8, 315, -54.6, 7.3, -29.9}}, {3900, { 7.5, -31.0, 458, -42.7, 310, -54.4, 7.5, -31.0}}, {4000, { 7.8, -32.1, 452, -42.7, 304, -54.3, 7.8, -32.1}} }; /* V.56bis EIA LL-6, non-loaded loop */ struct { int freq; float ad[8]; } eia_ll6[] = { { 200, {-0.2, -39.3, 1756, -12.0, 1748, -19.8, -0.2, -39.3}}, { 300, {-0.2, -31.7, 1642, -15.9, 1689, -26.9, -0.2, -31.7}}, { 400, {-0.2, -37.5, 1506, -18.4, 1427, -33.4, -0.2, -37.5}}, { 500, {-0.1, -34.7, 1442, -19.5, 1301, -37.7, -0.1, -34.7}}, { 600, {-0.1, -46.0, 1363, -20.1, 1153, -40.7, -0.1, -46.0}}, { 700, { 0.0, -40.8, 1320, -20.7, 1045, -42.2, 0.0, -40.8}}, { 800, { 0.0, -40.1, 1269, -21.5, 943, -42.3, 0.0, -40.1}}, { 900, { 0.0, -40.6, 1227, -22.5, 878, -41.3, 0.0, -40.6}}, {1000, { 6.6, -28.0, 1161, -23.4, 825, -39.3, 6.6, -28.0}}, {1100, { 0.0, -16.5, 1082, -23.5, 797, -36.8, 0.0, -16.5}}, {1200, {-0.1, 0.3, 1000, -22.2, 798, -34.4, -0.1, 0.3}}, {1300, { 0.0, -2.3, 943, -19.3, 826, -33.2, 0.0, -2.3}}, {1400, { 0.0, 13.5, 896, -14.0, 870, -33.8, 0.0, 13.5}}, {1500, { 0.1, 22.6, 890, -7.2, 916, -36.8, 0.1, 22.6}}, {1600, { 0.3, 30.3, 940, -0.3, 938, -42.0, 0.3, 30.3}}, {1700, { 0.5, 12.5, 1052, 4.6, 929, -48.0, 0.5, 12.5}}, {1800, { 0.8, 458.6, 1212, 6.9, 880, -52.8, 0.8, 458.6}}, {1900, { 1.1, -5.1, 1410, 3.5, 814, -56.5, 1.1, -5.1}}, {2000, { 1.4, -5.0, 1579, -3.6, 747, -58.5, 1.4, -5.0}}, {2100, { 1.5, 6.1, 1618, -13.2, 688, -58.8, 1.5, 6.1}}, {2200, { 1.5, 33.5, 1491, -21.5, 646, -57.7, 1.5, 33.5}}, {2300, { 1.4, 80.5, 1275, -24.9, 625, -55.6, 1.4, 80.5}}, {2400, { 1.3, 142.3, 1078, -20.8, 633, -53.8, 1.3, 142.3}}, {2500, { 1.4, 196.5, 985, -9.3, 664, -54.5, 1.4, 196.5}}, {2600, { 1.6, 214.5, 1045, 2.4, 692, -57.6, 1.6, 214.5}}, {2700, { 2.4, 196.8, 1326, 13.7, 684, -63.5, 2.4, 196.8}}, {2800, { 3.4, 150.4, 1887, 14.7, 637, -68.3, 3.4, 150.4}}, {2900, { 4.3, 125.3, 2608, 1.3, 501, -70.7, 4.3, 125.3}}, {3000, { 4.9, 174.6, 2730, -21.8, 533, -70.6, 4.9, 174.6}}, {3100, { 4.9, 380.0, 2094, -33.7, 506, -68.5, 4.9, 380.0}}, {3200, { 5.2, 759.3, 1642, -21.3, 522, -67.0, 5.2, 759.3}}, {3300, { 8.0, 680.1, 2348, 0.5, 531, -72.9, 8.0, 680.1}}, {3400, {13.1, 237.8, 4510, -20.9, 482, -77.3, 13.1, 237.8}}, {3500, {18.2, -18.8, 4116, -59.6, 439, -78.0, 18.2, -18.8}}, {3600, {22.7, -145.4, 3041, -74.4, 487, -77.7, 22.7, -145.4}}, {3700, {26.8, -214.5, 2427, -80.1, 383, -77.1, 26.8, -214.5}}, {3800, {30.4, -257.0, 2054, -82.7, 364, -76.4, 30.4, -257.0}}, {3900, {33.7, -285.6, 1803, -84.2, 348, -75.0, 33.7, -285.6}}, {4000, {36.8, -306.2, 1621, -85.1, 334, -75.7, 36.8, -306.2}} }; /* V.56bis EIA LL-7, non-loaded loop */ struct { int freq; float ad[8]; } eia_ll7[] = { { 200, { 0.4, -81.3, 1848, -10.5, 1737, -15.6, 0.4, -81.3}}, { 300, { 0.3, -68.9, 1785, -16.2, 1585, -21.6, 0.3, -68.9}}, { 400, { 0.2, -68.1, 1646, -22.0, 1388, -25.8, 0.2, -68.1}}, { 500, { 0.1, -57.0, 1528, -26.2, 1247, -27.7, 0.1, -57.0}}, { 600, { 0.0, -59.8, 1349, -28.9, 1087, -27.3, 0.0, -59.8}}, { 700, { 0.0, -45.0, 1205, -29.1, 975, -24.8, 0.0, -45.0}}, { 800, {-0.1, -36.9, 1064, -26.8, 885, -19.7, -0.1, -36.9}}, { 900, {-0.1, -37.1, 989, -22.6, 846, -13.5, -0.1, -37.1}}, {1000, { 5.9, -29.2, 944, -16.6, 847, -6.1, 5.9, -29.2}}, {1100, { 0.1, -30.8, 951, -10.5, 900, 0.3, 0.1, -30.8}}, {1200, { 0.2, -40.7, 1008, -5.9, 999, 4.9, 0.2, -40.7}}, {1300, { 0.4, -53.3, 1897, -4.0, 1122, 4.6, 0.4, -53.3}}, {1400, { 0.5, -52.7, 1197, -4.8, 1253, 1.9, 0.5, -52.7}}, {1500, { 0.6, -48.3, 1269, -8.4, 1339, -3.8, 0.6, -48.3}}, {1600, { 0.6, -38.0, 1274, -13.2, 1337, -10.4, 0.6, -38.0}}, {1700, { 0.5, -21.6, 1208, -16.9, 1250, -15.2, 0.5, -21.6}}, {1800, { 0.4, 539.7, 1119, -17.8, 1143, -16.6, 0.4, 539.7}}, {1900, { 0.3, 35.4, 1027, -14.7, 1036, -13.7, 0.3, 35.4}}, {2000, { 0.3, 64.1, 989, -7.9, 998, -6.9, 0.3, 64.1}}, {2100, { 0.4, 76.1, 1045, 0.1, 1040, 1.0, 0.4, 76.1}}, {2200, { 0.6, 69.8, 1210, 5.3, 1197, 6.9, 0.6, 69.8}}, {2300, { 1.0, 55.9, 1460, 4.6, 1430, 5.4, 1.0, 55.9}}, {2400, { 1.2, 51.3, 1692, -2.8, 1640, -1.7, 1.2, 51.3}}, {2500, { 1.3, 72.6, 1730, -13.4, 1666, -11.5, 1.3, 72.6}}, {2600, { 1.3, 117.1, 1613, -49.6, 1556, -16.9, 1.3, 117.1}}, {2700, { 1.1, 222.5, 1371, -19.5, 1334, -16.1, 1.1, 222.5}}, {2800, { 1.1, 332.3, 1258, -8.9, 1243, -5.1, 1.1, 332.3}}, {2900, { 1.7, 356.1, 1474, 4.8, 1480, 8.4, 1.7, 356.1}}, {3000, { 2.8, 299.9, 2128, 6.6, 2143, 9.8, 2.8, 299.9}}, {3100, { 3.9, 309.4, 2813, -10.5, 2882, -7.1, 3.9, 309.4}}, {3200, { 4.4, 576.4, 2490, -27.7, 2487, -22.2, 4.4, 576.4}}, {3300, { 5.6, 1030.6, 2237, -17.4, 2385, -9.0, 5.6, 1030.6}}, {3400, {10.7, 570.2, 3882, -19.2, 4855, -14.9, 10.7, 570.2}}, {3500, {17.3, 83.5, 4116, -57.4, 4649, -63.5, 17.3, 83.5}}, {3600, {23.2, -130.6, 3057, -74.0, 3175, -78.6, 23.2, -130.6}}, {3700, {28.3, -153.9, 2432, -80.0, 2471, -83.1, 28.3, -153.9}}, {3800, {32.8, -292.4, 2055, -82.8, 2072, -85.1, 32.8, -292.4}}, {3900, {36.9, -249.9, 1803, -84.2, 1811, -86.1, 36.9, -249.9}}, {4000, {40.7, -356.2, 1621, -85.1, 1625, -86.7, 40.7, -356.2}} }; /* V.56bis ETSI LL-1, non-loaded loop */ struct { int freq; float ad[8]; } etsi_ll1[] = { { 200, {-0.78, 14.0, 1248.5, -9.7, 1248.5, -9.7, -0.78, 14.0}}, { 300, {-0.74, 10.0, 1220.9, -14.3, 1220.9, -14.3, -0.74, 10.0}}, { 400, {-0.68, 8.0, 1185.2, -18.6, 1185.2, -18.6, -0.68, 8.0}}, { 500, {-0.60, 7.0, 1143.9, -22.6, 1143.9, -22.6, -0.60, 7.0}}, { 600, {-0.51, 6.0, 1099.0, -26.2, 1099.0, -26.2, -0.51, 6.0}}, { 700, {-0.40, 5.6, 1052.5, -29.5, 1052.5, -29.5, -0.40, 5.6}}, { 800, {-0.28, 5.3, 1005.9, -32.4, 1005.9, -32.4, -0.28, 5.3}}, { 900, {-0.14, 5.0, 960.3, -35.0, 960.3, -35.0, -0.14, 5.0}}, {1000, { 4.7, 4.6, 916.4, -37.3, 916.4, -37.3, 4.7, 4.6}}, {1100, { 0.16, 4.3, 874.6, -39.3, 874.6, -39.3, 0.16, 4.3}}, {1200, { 0.33, 3.6, 835.3, -41.1, 835.3, -41.1, 0.33, 3.6}}, {1300, { 0.49, 2.6, 798.5, -42.6, 798.5, -42.6, 0.49, 2.6}}, {1400, { 0.67, 2.0, 764.2, -43.9, 764.2, -43.9, 0.67, 2.0}}, {1500, { 0.85, 1.0, 732.3, -45.1, 732.3, -45.1, 0.85, 1.0}}, {1600, { 1.04, 0.6, 702.7, -46.1, 702.7, -46.1, 1.04, 0.6}}, {1700, { 1.23, 0.3, 675.3, -47.0, 675.3, -47.0, 1.23, 0.3}}, {1800, { 1.43, 40.0, 649.8, -47.7, 649.8, -47.7, 1.43, 40.0}}, {1900, { 1.63, -1.0, 626.2, -48.4, 626.2, -48.4, 1.63, -1.0}}, {2000, { 1.83, -2.0, 604.3, -48.9, 604.3, -48.9, 1.83, -2.0}}, {2100, { 2.03, -3.3, 584.0, -49.4, 584.0, -49.4, 2.03, -3.3}}, {2200, { 2.23, -3.6, 565.1, -49.8, 565.1, -49.8, 2.23, -3.6}}, {2300, { 2.44, -4.3, 547.5, -50.1, 547.5, -50.1, 2.44, -4.3}}, {2400, { 2.64, -5.0, 531.1, -50.4, 531.1, -50.4, 2.64, -5.0}}, {2500, { 2.84, -6.1, 515.9, -50.6, 515.9, -50.6, 2.84, -6.1}}, {2600, { 3.05, -6.6, 501.6, -50.8, 501.6, -50.8, 3.05, -6.6}}, {2700, { 3.25, -7.3, 488.2, -51.0, 488.2, -51.0, 3.25, -7.3}}, {2800, { 3.45, -7.6, 475.7, -51.1, 475.7, -51.1, 3.45, -7.6}}, {2900, { 3.65, -8.3, 464.0, -51.1, 464.0, -51.1, 3.65, -8.3}}, {3000, { 3.85, -8.6, 453.0, -51.2, 453.0, -51.2, 3.85, -8.6}}, {3100, { 4.04, -9.3, 442.6, -51.2, 442.6, -51.2, 4.04, -9.3}}, {3200, { 4.24, -10.3, 432.9, -51.2, 432.9, -51.2, 4.24, -10.3}}, {3300, { 4.43, -10.6, 423.7, -51.2, 423.7, -51.2, 4.43, -10.6}}, {3400, { 4.62, -11.3, 415.1, -51.2, 415.1, -51.2, 4.62, -11.3}}, {3500, { 4.81, -11.6, 406.9, -51.1, 406.9, -51.1, 4.81, -11.6}}, {3600, { 5.00, -12.3, 399.1, -51.1, 399.1, -51.1, 5.00, -12.3}}, {3700, { 5.19, -13.0, 391.8, -51.0, 391.8, -51.0, 5.19, -13.0}}, {3800, { 5.37, -13.4, 384.9, -51.0, 384.9, -51.0, 5.37, -13.4}}, {3900, { 5.56, -13.8, 378.3, -50.9, 378.3, -50.9, 5.56, -13.8}}, {4000, { 5.74, -14.4, 372.0, -50.8, 372.0, -50.8, 5.74, -14.4}} }; /* V.56bis ETSI LL-2, non-loaded loop */ struct { int freq; float ad[8]; } etsi_ll2[] = { { 200, {-0.10, 15.0, 850.3, -3.4, 850.3, -3.4, -0.10, 15.0}}, { 300, {-0.09, 8.0, 848.1, -5.1, 848.1, -5.1, -0.09, 8.0}}, { 400, {-0.09, 7.0, 845.1, -6.7, 845.1, -6.7, -0.09, 7.0}}, { 500, {-0.08, 5.0, 841.3, -8.4, 841.3, -8.4, -0.08, 5.0}}, { 600, {-0.07, 4.6, 836.7, -10.0, 836.7, -10.0, -0.07, 4.6}}, { 700, {-0.06, 4.3, 831.3, -11.6, 831.3, -11.6, -0.06, 4.3}}, { 800, {-0.04, 3.8, 825.3, -13.2, 825.3, -13.2, -0.04, 3.8}}, { 900, {-0.02, 3.4, 818.6, -14.8, 818.6, -14.8, -0.02, 3.4}}, {1000, { 1.80, 3.0, 811.4, -16.3, 811.4, -16.3, 1.8, 3.0}}, {1100, { 0.02, 2.6, 803.6, -17.8, 803.6, -17.8, 0.02, 2.6}}, {1200, { 0.04, 2.3, 795.3, -19.3, 795.3, -19.3, 0.04, 2.3}}, {1300, { 0.06, 1.3, 786.6, -20.7, 786.6, -20.7, 0.06, 1.3}}, {1400, { 0.09, 0.9, 777.5, -22.1, 777.5, -22.1, 0.09, 0.9}}, {1500, { 0.12, 0.6, 768.1, -23.5, 768.1, -23.5, 0.12, 0.6}}, {1600, { 0.15, 0.3, 758.4, -24.8, 758.4, -24.8, 0.15, 0.3}}, {1700, { 0.18, 0.0, 748.4, -26.1, 748.4, -26.1, 0.18, 0.0}}, {1800, { 0.21, 15, 738.4, -27.3, 738.4, -27.3, 0.21, 15.0}}, {1900, { 0.24, -1.0, 728.1, -28.5, 728.1, -28.5, 0.24, -1.0}}, {2000, { 0.28, -2.3, 717.8, -29.7, 717.8, -29.7, 0.28, -2.3}}, {2100, { 0.32, -2.6, 707.4, -30.8, 707.4, -30.8, 0.32, -2.6}}, {2200, { 0.36, -3.0, 697.0, -31.9, 697.0, -31.9, 0.36, -3.0}}, {2300, { 0.40, -3.3, 686.6, -33.0, 686.6, -33.0, 0.40, -3.3}}, {2400, { 0.44, -3.6, 676.2, -34.0, 676.2, -34.0, 0.44, -3.6}}, {2500, { 0.48, -4.5, 665.9, -35.0, 665.9, -35.0, 0.48, -4.5}}, {2600, { 0.53, -5.4, 655.6, -35.9, 655.6, -35.9, 0.53, -5.4}}, {2700, { 0.57, -6.3, 645.5, -36.8, 645.5, -36.8, 0.57, -6.3}}, {2800, { 0.62, -6.6, 635.5, -37.7, 635.5, -37.7, 0.62, -6.6}}, {2900, { 0.67, -6.9, 625.6, -38.6, 625.6, -38.6, 0.67, -6.9}}, {3000, { 0.72, -7.5, 615.8, -39.4, 615.8, -39.4, 0.72, -7.5}}, {3100, { 0.77, -8.3, 606.2, -40.2, 606.2, -40.2, 0.77, -8.3}}, {3200, { 0.82, -8.6, 596.7, -40.9, 596.7, -40.9, 0.82, -8.6}}, {3300, { 0.87, -9.3, 587.4, -41.6, 587.4, -41.6, 0.87, -9.3}}, {3400, { 0.92, -9.6, 578.3, -42.3, 578.3, -42.3, 0.92, -9.6}}, {3500, { 0.98, -10.3, 569.3, -43.0, 569.3, -43.0, 0.98, -10.3}}, {3600, { 1.03, -10.6, 560.6, -43.7, 560.6, -43.7, 1.03, -10.6}}, {3700, { 1.09, -11.3, 552.0, -44.3, 552.0, -44.3, 1.09, -11.3}}, {3800, { 1.14, -11.6, 543.5, -44.9, 543.5, -44.9, 1.14, -11.6}}, {3900, { 1.20, -12.3, 535.3, -45.4, 535.3, -45.4, 1.20, -12.3}}, {4000, { 1.26, -13.3, 527.2, -46.0, 527.2, -46.0, 1.26, -13.3}} }; /* V.56bis AD-1 AD-5 AD-6 AD-7 AD-8 AD-9 */ struct { int freq; float ad[6]; } ad[] = { { 0, {90.0, 90.0, 90.0, 90.0, 90.0, 90.0}}, { 200, { 6.0, 3.2, 3.0, 2.9, 11.6, 23.3}}, { 300, { 1.3, 1.4, 1.2, 1.1, 6.9, 13.9}}, { 400, { 0.0, 0.4, 0.3, 0.3, 4.0, 7.9}}, { 500, { 0.0, -0.1, 0.0, 0.1, 2.0, 4.1}}, { 600, { 0.0, -0.1, 0.0, 0.1, 1.2, 2.4}}, { 700, { 0.0, 0.1, 0.0, 0.0, 0.8, 1.7}}, { 800, { 0.0, 0.0, 0.0, -0.1, 0.5, 1.1}}, { 900, { 0.0, 0.0, 0.0, -0.1, 0.2, 0.4}}, {1000, { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}}, {1100, { 0.0, 0.0, 0.1, 0.0, -0.1, -0.2}}, {1200, { 0.0, 0.0, 0.1, 0.1, -0.1, -0.2}}, {1300, { 0.0, 0.1, 0.2, 0.3, -0.1, -0.2}}, {1400, { 0.0, 0.2, 0.3, 0.4, -0.1, -0.3}}, {1500, { 0.0, 0.2, 0.3, 0.4, -0.2, -0.4}}, {1600, { 0.0, 0.3, 0.5, 0.5, -0.1, -0.3}}, {1700, { 0.0, 0.3, 0.5, 0.6, -0.1, -0.1}}, {1800, { 0.0, 0.3, 0.5, 0.6, 0.0, 0.0}}, {1900, { 0.0, 0.4, 0.7, 0.7, 0.1, 0.2}}, {2000, { 0.0, 0.5, 0.8, 0.9, 0.2, 0.5}}, {2100, { 0.1, 0.6, 1.0, 1.0, 0.5, 0.9}}, {2200, { 0.2, 0.7, 1.1, 1.1, 0.6, 1.1}}, {2300, { 0.3, 0.9, 1.2, 1.4, 0.8, 1.5}}, {2400, { 0.4, 1.1, 1.5, 1.6, 0.9, 1.8}}, {2500, { 0.5, 1.3, 1.8, 2.0, 1.1, 2.3}}, {2600, { 0.6, 1.6, 2.4, 2.7, 1.4, 2.8}}, {2700, { 0.7, 2.0, 3.0, 3.5, 1.7, 3.4}}, {2800, { 0.7, 2.3, 3.5, 4.3, 2.0, 4.0}}, {2900, { 0.9, 2.8, 4.2, 5.0, 2.4, 4.9}}, {3000, { 1.1, 3.2, 4.9, 5.8, 3.0, 5.9}}, {3100, { 1.2, 3.5, 5.6, 6.7, 3.4, 6.8}}, {3200, { 1.3, 4.1, 6.7, 8.0, 3.9, 7.7}}, {3300, { 1.6, 4.8, 8.0, 9.6, 4.6, 9.2}}, {3400, { 1.8, 5.3, 9.1, 11.0, 5.4, 10.7}}, {3500, { 2.4, 5.7, 10.3, 12.2, 6.3, 12.6}}, {3600, { 3.0, 6.6, 12.1, 13.9, 7.8, 15.5}}, {3700, { 5.7, 8.9, 15.8, 17.3, 10.3, 20.5}}, {3800, {13.5, 15.7, 24.4, 25.7, 16.2, 32.4}}, {3900, {31.2, 31.1, 42.2, 43.3, 29.9, 59.9}}, {4000, {31.2, 31.1, 42.2, 43.3, 29.9, 59.9}} }; /* V.56bis EDD-1 EDD-2 EDD-3 */ struct { int freq; float edd[3]; } edd[] = { { 0, {3.98, 3.76, 8.00}}, { 200, {3.98, 3.76, 8.00}}, { 300, {2.70, 3.76, 8.00}}, { 400, {1.69, 2.20, 6.90}}, { 500, {1.15, 1.36, 5.50}}, { 600, {0.80, 0.91, 4.40}}, { 700, {0.60, 0.64, 3.40}}, { 800, {0.50, 0.46, 2.80}}, { 900, {0.40, 0.34, 2.00}}, {1000, {0.30, 0.24, 1.50}}, {1100, {0.20, 0.16, 1.00}}, {1200, {0.20, 0.11, 0.70}}, {1300, {0.10, 0.07, 0.40}}, {1400, {0.05, 0.05, 0.30}}, {1500, {0.00, 0.03, 0.20}}, {1600, {0.00, 0.01, 0.10}}, {1700, {0.00, 0.00, 0.10}}, {1800, {0.00, 0.00, 0.00}}, {1900, {0.00, 0.02, 0.10}}, {2000, {0.00, 0.04, 0.10}}, {2100, {0.02, 0.08, 0.10}}, {2200, {0.02, 0.12, 0.20}}, {2300, {0.02, 0.16, 0.20}}, {2400, {0.02, 0.20, 0.30}}, {2500, {0.10, 0.27, 0.40}}, {2600, {0.12, 0.36, 0.50}}, {2700, {0.15, 0.47, 0.80}}, {2800, {0.20, 0.60, 1.10}}, {2900, {0.27, 0.77, 1.50}}, {3000, {0.40, 1.01, 2.00}}, {3100, {0.56, 1.32, 2.60}}, {3200, {0.83, 1.78, 3.20}}, {3300, {1.07, 1.78, 4.00}}, {3400, {1.39, 1.78, 4.00}}, {3500, {1.39, 1.78, 4.00}}, {3600, {1.39, 1.78, 4.00}}, {3700, {1.39, 1.78, 4.00}}, {3800, {1.39, 1.78, 4.00}}, {3900, {1.39, 1.78, 4.00}}, {4000, {1.39, 1.78, 4.00}} }; /* V.56bis PCM AD-1, AD-2, AD-3 */ struct { int freq; float ad[3]; } pcm_ad[] = { { 50, {41.4, 77.8, 114.2}}, { 100, {15.5, 27.7, 39.9}}, { 150, { 3.7, 6.1, 8.6}}, { 200, { 0.5, 0.8, 1.0}}, { 250, {-0.2, -0.2, -0.3}}, { 300, {-0.2, -0.3, -0.4}}, { 400, { 0.0, -0.2, -0.3}}, { 500, {-0.2, -0.4, -0.5}}, { 600, {-0.2, -0.3, -0.5}}, { 700, {-0.2, -0.3, -0.5}}, { 800, {-0.2, -0.4, -0.5}}, { 900, {-0.2, -0.3, -0.4}}, {1000, {-0.1, -0.2, -0.3}}, {1100, {-0.2, -0.3, -0.3}}, {1200, {-0.2, -0.3, -0.4}}, {1300, {-0.2, -0.3, -0.5}}, {1400, {-0.1, -0.3, -0.4}}, {1500, {-0.1, -0.3, -0.4}}, {1600, {-0.1, -0.2, -0.3}}, {1700, {-0.1, -0.3, -0.4}}, {1800, {-0.2, -0.3, -0.4}}, {1900, {-0.2, -0.3, -0.3}}, {2000, {-0.1, -0.2, -0.3}}, {2100, {-0.1, -0.2, -0.3}}, {2200, {-0.1, -0.3, -0.4}}, {2300, {-0.1, -0.1, -0.2}}, {2400, {-0.1, -0.1, -0.2}}, {2500, { 0.0, -0.1, -0.1}}, {2600, { 0.0, -0.1, -0.1}}, {2700, { 0.0, 0.0, 0.1}}, {2800, { 0.0, 0.0, 0.1}}, {2900, { 0.1, 0.2, 0.2}}, {3000, { 0.0, 0.0, 0.1}}, {3100, { 0.0, 0.0, 0.0}}, {3200, { 0.0, 0.0, 0.1}}, {3300, { 0.3, 0.7, 1.0}}, {3400, { 1.2, 2.4, 3.6}}, {3500, { 3.2, 6.3, 9.5}}, {3550, { 5.0, 9.6, 14.3}}, {3600, { 7.0, 13.5, 19.9}}, {3650, {10.0, 18.7, 27.5}}, {3700, {13.4, 24.6, 35.8}}, {3750, {18.1, 32.1, 46.2}}, {3800, {24.3, 41.2, 58.2}}, {3850, {32.5, 52.6, 72.7}}, {3900, {43.4, 66.6, 89.8}}, {4000, {43.4, 66.6, 89.8}} }; /* V.56bis PCM EDD-1, EDD-2, EDD-3 */ struct { int freq; float edd[3]; } pcm_edd[] = { { 150, { 2.76, 5.5, 8.3}}, { 200, { 1.70, 3.4, 5.1}}, { 250, { 0.92, 1.8, 2.8}}, { 300, { 0.55, 1.1, 1.7}}, { 400, { 0.25, 0.5, 0.7}}, { 500, { 0.12, 0.2, 0.4}}, { 600, { 0.06, 0.1, 0.2}}, { 700, { 0.03, 0.1, 0.1}}, { 800, { 0.01, 0.0, 0.0}}, { 900, { 0.00, 0.0, 0.0}}, {1000, {-0.01, 0.0, 0.0}}, {1100, {-0.01, 0.0, 0.0}}, {1200, {-0.02, 0.0, -0.1}}, {1300, {-0.02, 0.0, -0.1}}, {1400, {-0.01, 0.0, 0.0}}, {1500, {-0.01, 0.0, 0.0}}, {1600, { 0.00, 0.0, 0.0}}, {1700, { 0.00, 0.0, 0.0}}, {1800, { 0.01, 0.0, 0.0}}, {1900, { 0.02, 0.0, 0.0}}, {2000, { 0.02, 0.0, 0.1}}, {2100, { 0.04, 0.1, 0.1}}, {2200, { 0.05, 0.1, 0.2}}, {2300, { 0.06, 0.1, 0.2}}, {2400, { 0.07, 0.1, 0.2}}, {2500, { 0.10, 0.2, 0.3}}, {2600, { 0.11, 0.2, 0.3}}, {2700, { 0.14, 0.3, 0.4}}, {2800, { 0.18, 0.4, 0.5}}, {2900, { 0.22, 0.4, 0.6}}, {3000, { 0.27, 0.5, 0.8}}, {3100, { 0.34, 0.7, 1.0}}, {3200, { 0.45, 0.9, 1.4}}, {3250, { 0.52, 1.0, 1.6}}, {3300, { 0.60, 1.2, 1.8}}, {3350, { 0.66, 1.3, 2.0}}, {3400, { 0.74, 1.5, 2.2}}, {3450, { 0.79, 1.6, 2.4}}, {3500, { 0.83, 1.7, 2.5}}, {3550, { 0.84, 1.7, 2.5}}, {3600, { 0.81, 1.6, 2.4}}, {3700, { 0.81, 1.6, 2.4}}, {3800, { 0.81, 1.6, 2.4}}, {3900, { 0.81, 1.6, 2.4}}, {4000, { 0.81, 1.6, 2.4}} }; FILE *outfile; float impulse_responses[100][LINE_FILTER_SIZE]; int filter_sets = 0; static void generate_ad_edd(void) { float f; float offset; float amp; float phase; float delay; float pw; #if defined(HAVE_FFTW3_H) double in[FFT_SIZE][2]; double out[FFT_SIZE][2]; #else fftw_complex in[FFT_SIZE]; fftw_complex out[FFT_SIZE]; #endif fftw_plan p; int i; int j; int k; int l; #if defined(HAVE_FFTW3_H) p = fftw_plan_dft_1d(FFT_SIZE, in, out, FFTW_BACKWARD, FFTW_ESTIMATE); #else p = fftw_create_plan(FFT_SIZE, FFTW_BACKWARD, FFTW_ESTIMATE); #endif for (j = 0; j < 6; j++) { for (k = 0; k < 3; k++) { for (i = 0; i < FFT_SIZE; i++) { #if defined(HAVE_FFTW3_H) in[i][0] = in[i][1] = 0.0; #else in[i].re = in[i].im = 0.0; #endif } for (i = 1; i < FFT_SIZE/2; i++) { f = (float) i*SAMPLE_RATE/FFT_SIZE; amp = 0.0; for (l = 0; l < (int) (sizeof(ad)/sizeof(ad[0])); l++) { if (f < ad[l].freq) break; } if (l < (int) (sizeof(ad)/sizeof(ad[0]))) { offset = (f - ad[l - 1].freq)/(ad[l].freq - ad[l - 1].freq); amp = (1.0 - offset)*ad[l - 1].ad[j] + offset*ad[l].ad[j]; amp = pow(10.0, -amp/20.0); } delay = 0.0; for (l = 0; l < (int) (sizeof(edd)/sizeof(edd[0])); l++) { if (f < edd[l].freq) break; } if (l < (int) (sizeof(edd)/sizeof(edd[0]))) { offset = (f - edd[l - 1].freq)/(edd[l].freq - edd[l - 1].freq); delay = (1.0 - offset)*edd[l - 1].edd[k] + offset*edd[l].edd[k]; } phase = 2.0*M_PI*f*delay*0.001; #if defined(HAVE_FFTW3_H) in[i][0] = amp*cos(phase); in[i][1] = amp*sin(phase); in[FFT_SIZE - i][0] = in[i][0]; in[FFT_SIZE - i][1] = -in[i][1]; #else in[i].re = amp*cos(phase); in[i].im = amp*sin(phase); in[FFT_SIZE - i].re = in[i].re; in[FFT_SIZE - i].im = -in[i].im; #endif } #if 0 for (i = 0; i < FFT_SIZE; i++) fprintf(outfile, "%5d %15.5f,%15.5f\n", i, in[i].re, in[i].im); #endif #if defined(HAVE_FFTW3_H) fftw_execute(p); #else fftw_one(p, in, out); #endif fprintf(outfile, "/* V.56bis AD-%d, EDD%d */\n", (j == 0) ? 1 : j + 4, k + 1); fprintf(outfile, "float ad_%d_edd_%d_model[] =\n", (j == 0) ? 1 : j + 4, k + 1); fprintf(outfile, "{\n"); /* Normalise the filter's gain */ pw = 0.0; l = FFT_SIZE - (LINE_FILTER_SIZE - 1)/2; for (i = 0; i < LINE_FILTER_SIZE; i++) { #if defined(HAVE_FFTW3_H) pw += out[l][0]*out[l][0]; #else pw += out[l].re*out[l].re; #endif if (++l == FFT_SIZE) l = 0; } pw = sqrt(pw); l = FFT_SIZE - (LINE_FILTER_SIZE - 1)/2; for (i = 0; i < LINE_FILTER_SIZE; i++) { #if defined(HAVE_FFTW3_H) impulse_responses[filter_sets][i] = out[l][0]/pw; #else impulse_responses[filter_sets][i] = out[l].re/pw; #endif fprintf(outfile, "%15.5f,\n", impulse_responses[filter_sets][i]); if (++l == FFT_SIZE) l = 0; } fprintf(outfile, "};\n\n"); filter_sets++; } } } static void generate_proakis(void) { float f; float f1; float offset; float amp; float phase; float delay; float pw; int index; int i; int l; #if defined(HAVE_FFTW3_H) double in[FFT_SIZE][2]; double out[FFT_SIZE][2]; #else fftw_complex in[FFT_SIZE]; fftw_complex out[FFT_SIZE]; #endif fftw_plan p; #if defined(HAVE_FFTW3_H) p = fftw_plan_dft_1d(FFT_SIZE, in, out, FFTW_BACKWARD, FFTW_ESTIMATE); #else p = fftw_create_plan(FFT_SIZE, FFTW_BACKWARD, FFTW_ESTIMATE); #endif for (i = 0; i < FFT_SIZE; i++) { #if defined(HAVE_FFTW3_H) in[i][0] = in[i][1] = 0.0; #else in[i].re = in[i].im = 0.0; #endif } for (i = 1; i < FFT_SIZE/2; i++) { f = (float) i*SAMPLE_RATE/FFT_SIZE; f1 = f/200.0; offset = f1 - floor(f1); index = (int) floor(f1); /* Linear interpolation */ amp = ((1.0 - offset)*proakis[index].amp + offset*proakis[index + 1].amp)/2.3; delay = (1.0 - offset)*proakis[index].delay + offset*proakis[index + 1].delay; phase = 2.0*M_PI*f*delay*0.001; #if defined(HAVE_FFTW3_H) in[i][0] = amp*cos(phase); in[i][1] = amp*sin(phase); in[FFT_SIZE - i][0] = in[i][0]; in[FFT_SIZE - i][1] = -in[i][1]; #else in[i].re = amp*cos(phase); in[i].im = amp*sin(phase); in[FFT_SIZE - i].re = in[i].re; in[FFT_SIZE - i].im = -in[i].im; #endif } #if defined(HAVE_FFTW3_H) fftw_execute(p); #else fftw_one(p, in, out); #endif fprintf(outfile, "/* Medium range telephone line response\n"); fprintf(outfile, " (from p 537, Digital Communication, John G. Proakis */\n"); fprintf(outfile, "float proakis_line_model[] =\n"); fprintf(outfile, "{\n"); /* Normalise the filter's gain */ pw = 0.0; l = FFT_SIZE - (LINE_FILTER_SIZE - 1)/2; for (i = 0; i < LINE_FILTER_SIZE; i++) { #if defined(HAVE_FFTW3_H) pw += out[l][0]*out[l][0]; #else pw += out[l].re*out[l].re; #endif if (++l == FFT_SIZE) l = 0; } pw = sqrt(pw); l = FFT_SIZE - (LINE_FILTER_SIZE - 1)/2; for (i = 0; i < LINE_FILTER_SIZE; i++) { #if defined(HAVE_FFTW3_H) impulse_responses[filter_sets][i] = out[l][0]/pw; #else impulse_responses[filter_sets][i] = out[l].re/pw; #endif fprintf(outfile, "%15.5f,\n", impulse_responses[filter_sets][i]); if (++l == FFT_SIZE) l = 0; } fprintf(outfile, "};\n\n"); filter_sets++; } int main(int argc, char *argv[]) { int i; int j; if ((outfile = fopen("line_models.h", "w")) == NULL) { fprintf(stderr, "Failed to open %s\n", "line_model.txt"); exit(2); } generate_proakis(); generate_ad_edd(); fclose(outfile); if (argc > 1) { for (i = 0; i < LINE_FILTER_SIZE; i++) { printf("%d, ", i); for (j = 0; j < filter_sets; j++) { printf("%15.5f, ", impulse_responses[j][i]); } printf("\n"); } } return 0; }