/* * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu> * (C) 2016 by Tom Tsou <tom.tsou@ettus.com> * * 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 as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include <stdint.h> #include <string.h> #include <osmocom/core/bits.h> #include <osmocom/coding/gsm0503_mapping.h> /*! \addtogroup mapping * @{ * * GSM TS 05.03 burst mapping * * This module contains burst mapping routines as specified in 3GPP TS * 05.03 / 45.003. * * \file gsm0503_mapping.c */ void gsm0503_xcch_burst_unmap(sbit_t *iB, const sbit_t *eB, sbit_t *hl, sbit_t *hn) { memcpy(iB, eB, 57); memcpy(iB + 57, eB + 59, 57); if (hl) *hl = eB[57]; if (hn) *hn = eB[58]; } void gsm0503_xcch_burst_map(const ubit_t *iB, ubit_t *eB, const ubit_t *hl, const ubit_t *hn) { memcpy(eB, iB, 57); memcpy(eB + 59, iB + 57, 57); if (hl) eB[57] = *hl; if (hn) eB[58] = *hn; } void gsm0503_tch_burst_unmap(sbit_t *iB, const sbit_t *eB, sbit_t *h, int odd) { int i; /* brainfuck: only copy even or odd bits */ if (iB) { for (i = odd; i < 57; i += 2) iB[i] = eB[i]; for (i = 58 - odd; i < 114; i += 2) iB[i] = eB[i + 2]; } if (h) { if (!odd) *h = eB[58]; else *h = eB[57]; } } void gsm0503_tch_burst_map(const ubit_t *iB, ubit_t *eB, const ubit_t *h, int odd) { int i; /* brainfuck: only copy even or odd bits */ if (eB) { for (i = odd; i < 57; i += 2) eB[i] = iB[i]; for (i = 58 - odd; i < 114; i += 2) eB[i + 2] = iB[i]; } if (h) { if (!odd) eB[58] = *h; else eB[57] = *h; } } void gsm0503_mcs5_dl_burst_map(const ubit_t *di, ubit_t *eB, const ubit_t *hi, const ubit_t *up, int B) { int j; int q[8] = { 0, 0, 0, 0, 0, 0, 0, 0, }; for (j = 0; j < 156; j++) eB[j] = di[312 * B + j]; for (j = 156; j < 168; j++) eB[j] = hi[25 * B + j - 156]; for (j = 168; j < 174; j++) eB[j] = up[9 * B + j - 168]; for (j = 174; j < 176; j++) eB[j] = q[2 * B + j - 174]; for (j = 176; j < 179; j++) eB[j] = up[9 * B + j - 170]; for (j = 179; j < 192; j++) eB[j] = hi[25 * B + j - 167]; for (j = 192; j < 348; j++) eB[j] = di[312 * B + j - 36]; } void gsm0503_mcs5_dl_burst_unmap(sbit_t *di, const sbit_t *eB, sbit_t *hi, sbit_t *up, int B) { int j; for (j = 0; j < 156; j++) di[312 * B + j] = eB[j]; for (j = 156; j < 168; j++) hi[25 * B + j - 156] = eB[j]; for (j = 168; j < 174; j++) up[9 * B + j - 168] = eB[j]; for (j = 176; j < 179; j++) up[9 * B + j - 170] = eB[j]; for (j = 179; j < 192; j++) hi[25 * B + j - 167] = eB[j]; for (j = 192; j < 348; j++) di[312 * B + j - 36] = eB[j]; } void gsm0503_mcs5_ul_burst_map(const ubit_t *di, ubit_t *eB, const ubit_t *hi, int B) { int j; for (j = 0; j < 156; j++) eB[j] = di[312 * B + j]; for (j = 156; j < 174; j++) eB[j] = hi[34 * B + j - 156]; for (j = 174; j < 176; j++) eB[j] = 0; for (j = 176; j < 192; j++) eB[j] = hi[34 * B + j - 158]; for (j = 192; j < 348; j++) eB[j] = di[312 * B + j - 36]; } void gsm0503_mcs5_ul_burst_unmap(sbit_t *di, const sbit_t *eB, sbit_t *hi, int B) { int j; for (j = 0; j < 156; j++) di[312 * B + j] = eB[j]; for (j = 156; j < 174; j++) hi[34 * B + j - 156] = eB[j]; for (j = 176; j < 192; j++) hi[34 * B + j - 158] = eB[j]; for (j = 192; j < 348; j++) di[312 * B + j - 36] = eB[j]; } void gsm0503_mcs7_dl_burst_map(const ubit_t *di, ubit_t *eB, const ubit_t *hi, const ubit_t *up, int B) { int j; int q[8] = { 1, 1, 1, 0, 0, 1, 1, 1, }; for (j = 0; j < 153; j++) eB[j] = di[306 * B + j]; for (j = 153; j < 168; j++) eB[j] = hi[31 * B + j - 153]; for (j = 168; j < 174; j++) eB[j] = up[9 * B + j - 168]; for (j = 174; j < 176; j++) eB[j] = q[2 * B + j - 174]; for (j = 176; j < 179; j++) eB[j] = up[9 * B + j - 170]; for (j = 179; j < 195; j++) eB[j] = hi[31 * B + j - 164]; for (j = 195; j < 348; j++) eB[j] = di[306 * B + j - 42]; } void gsm0503_mcs7_dl_burst_unmap(sbit_t *di, const sbit_t *eB, sbit_t *hi, sbit_t *up, int B) { int j; for (j = 0; j < 153; j++) di[306 * B + j] = eB[j]; for (j = 153; j < 168; j++) hi[31 * B + j - 153] = eB[j]; for (j = 168; j < 174; j++) up[9 * B + j - 168] = eB[j]; for (j = 176; j < 179; j++) up[9 * B + j - 170] = eB[j]; for (j = 179; j < 195; j++) hi[31 * B + j - 164] = eB[j]; for (j = 195; j < 348; j++) di[306 * B + j - 42] = eB[j]; } void gsm0503_mcs7_ul_burst_map(const ubit_t *di, ubit_t *eB, const ubit_t *hi, int B) { int j; int q[8] = { 1, 1, 1, 0, 0, 1, 1, 1, }; for (j = 0; j < 153; j++) eB[j] = di[306 * B + j]; for (j = 153; j < 174; j++) eB[j] = hi[40 * B + j - 153]; for (j = 174; j < 176; j++) eB[j] = q[2 * B + j - 174]; for (j = 176; j < 195; j++) eB[j] = hi[40 * B + j - 155]; for (j = 195; j < 348; j++) eB[j] = di[306 * B + j - 42]; } void gsm0503_mcs7_ul_burst_unmap(sbit_t *di, const sbit_t *eB, sbit_t *hi, int B) { int j; for (j = 0; j < 153; j++) di[306 * B + j] = eB[j]; for (j = 153; j < 174; j++) hi[40 * B + j - 153] = eB[j]; for (j = 176; j < 195; j++) hi[40 * B + j - 155] = eB[j]; for (j = 195; j < 348; j++) di[306 * B + j - 42] = eB[j]; } void gsm0503_mcs5_burst_swap(sbit_t *eB) { sbit_t t[14]; t[0] = eB[155]; t[1] = eB[158]; t[2] = eB[161]; t[3] = eB[164]; t[4] = eB[167]; t[5] = eB[170]; t[6] = eB[173]; t[7] = eB[195]; t[8] = eB[196]; t[9] = eB[198]; t[10] = eB[199]; t[11] = eB[201]; t[12] = eB[202]; t[13] = eB[204]; eB[155] = eB[142]; eB[158] = eB[144]; eB[161] = eB[145]; eB[164] = eB[147]; eB[167] = eB[148]; eB[170] = eB[150]; eB[173] = eB[151]; eB[195] = eB[176]; eB[196] = eB[179]; eB[198] = eB[182]; eB[199] = eB[185]; eB[201] = eB[188]; eB[202] = eB[191]; eB[204] = eB[194]; eB[142] = t[0]; eB[144] = t[1]; eB[145] = t[2]; eB[147] = t[3]; eB[148] = t[4]; eB[150] = t[5]; eB[151] = t[6]; eB[176] = t[7]; eB[179] = t[8]; eB[182] = t[9]; eB[185] = t[10]; eB[188] = t[11]; eB[191] = t[12]; eB[194] = t[13]; } /*! @} */