mirror of https://gerrit.osmocom.org/libosmocore
292 lines
6.3 KiB
C
292 lines
6.3 KiB
C
/*
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* (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
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* (C) 2016 by Tom Tsou <tom.tsou@ettus.com>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdint.h>
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#include <string.h>
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#include <osmocom/core/bits.h>
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#include <osmocom/coding/gsm0503_mapping.h>
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void gsm0503_xcch_burst_unmap(sbit_t *iB, const sbit_t *eB,
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sbit_t *hl, sbit_t *hn)
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{
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memcpy(iB, eB, 57);
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memcpy(iB + 57, eB + 59, 57);
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if (hl)
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*hl = eB[57];
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if (hn)
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*hn = eB[58];
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}
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void gsm0503_xcch_burst_map(ubit_t *iB, ubit_t *eB, const ubit_t *hl,
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const ubit_t *hn)
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{
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memcpy(eB, iB, 57);
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memcpy(eB + 59, iB + 57, 57);
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if (hl)
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eB[57] = *hl;
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if (hn)
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eB[58] = *hn;
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}
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void gsm0503_tch_burst_unmap(sbit_t *iB, sbit_t *eB, sbit_t *h, int odd)
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{
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int i;
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/* brainfuck: only copy even or odd bits */
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if (iB) {
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for (i = odd; i < 57; i += 2)
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iB[i] = eB[i];
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for (i = 58 - odd; i < 114; i += 2)
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iB[i] = eB[i + 2];
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}
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if (h) {
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if (!odd)
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*h = eB[58];
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else
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*h = eB[57];
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}
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}
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void gsm0503_tch_burst_map(ubit_t *iB, ubit_t *eB, const ubit_t *h, int odd)
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{
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int i;
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/* brainfuck: only copy even or odd bits */
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if (eB) {
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for (i = odd; i < 57; i += 2)
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eB[i] = iB[i];
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for (i = 58 - odd; i < 114; i += 2)
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eB[i + 2] = iB[i];
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}
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if (h) {
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if (!odd)
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eB[58] = *h;
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else
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eB[57] = *h;
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}
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}
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void gsm0503_mcs5_dl_burst_map(const ubit_t *di, ubit_t *eB,
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const ubit_t *hi, const ubit_t *up, int B)
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{
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int j;
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int q[8] = { 0, 0, 0, 0, 0, 0, 0, 0, };
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for (j = 0; j < 156; j++)
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eB[j] = di[312 * B + j];
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for (j = 156; j < 168; j++)
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eB[j] = hi[25 * B + j - 156];
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for (j = 168; j < 174; j++)
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eB[j] = up[9 * B + j - 168];
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for (j = 174; j < 176; j++)
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eB[j] = q[2 * B + j - 174];
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for (j = 176; j < 179; j++)
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eB[j] = up[9 * B + j - 170];
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for (j = 179; j < 192; j++)
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eB[j] = hi[25 * B + j - 167];
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for (j = 192; j < 348; j++)
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eB[j] = di[312 * B + j - 36];
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}
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void gsm0503_mcs5_dl_burst_unmap(sbit_t *di, const sbit_t *eB,
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sbit_t *hi, sbit_t *up, int B)
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{
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int j;
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for (j = 0; j < 156; j++)
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di[312 * B + j] = eB[j];
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for (j = 156; j < 168; j++)
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hi[25 * B + j - 156] = eB[j];
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for (j = 168; j < 174; j++)
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up[9 * B + j - 168] = eB[j];
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for (j = 176; j < 179; j++)
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up[9 * B + j - 170] = eB[j];
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for (j = 179; j < 192; j++)
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hi[25 * B + j - 167] = eB[j];
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for (j = 192; j < 348; j++)
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di[312 * B + j - 36] = eB[j];
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}
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void gsm0503_mcs5_ul_burst_map(const ubit_t *di, ubit_t *eB,
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const ubit_t *hi, int B)
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{
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int j;
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for (j = 0; j < 156; j++)
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eB[j] = di[312 * B + j];
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for (j = 156; j < 174; j++)
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eB[j] = hi[34 * B + j - 156];
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for (j = 174; j < 176; j++)
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eB[j] = 0;
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for (j = 176; j < 192; j++)
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eB[j] = hi[34 * B + j - 158];
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for (j = 192; j < 348; j++)
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eB[j] = di[312 * B + j - 36];
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}
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void gsm0503_mcs5_ul_burst_unmap(sbit_t *di, const sbit_t *eB,
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sbit_t *hi, int B)
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{
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int j;
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for (j = 0; j < 156; j++)
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di[312 * B + j] = eB[j];
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for (j = 156; j < 174; j++)
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hi[34 * B + j - 156] = eB[j];
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for (j = 176; j < 192; j++)
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hi[34 * B + j - 158] = eB[j];
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for (j = 192; j < 348; j++)
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di[312 * B + j - 36] = eB[j];
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}
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void gsm0503_mcs7_dl_burst_map(const ubit_t *di, ubit_t *eB,
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const ubit_t *hi, const ubit_t *up, int B)
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{
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int j;
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int q[8] = { 1, 1, 1, 0, 0, 1, 1, 1, };
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for (j = 0; j < 153; j++)
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eB[j] = di[306 * B + j];
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for (j = 153; j < 168; j++)
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eB[j] = hi[31 * B + j - 153];
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for (j = 168; j < 174; j++)
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eB[j] = up[9 * B + j - 168];
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for (j = 174; j < 176; j++)
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eB[j] = q[2 * B + j - 174];
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for (j = 176; j < 179; j++)
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eB[j] = up[9 * B + j - 170];
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for (j = 179; j < 195; j++)
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eB[j] = hi[31 * B + j - 164];
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for (j = 195; j < 348; j++)
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eB[j] = di[306 * B + j - 42];
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}
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void gsm0503_mcs7_dl_burst_unmap(sbit_t *di, const sbit_t *eB,
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sbit_t *hi, sbit_t *up, int B)
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{
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int j;
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for (j = 0; j < 153; j++)
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di[306 * B + j] = eB[j];
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for (j = 153; j < 168; j++)
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hi[31 * B + j - 153] = eB[j];
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for (j = 168; j < 174; j++)
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up[9 * B + j - 168] = eB[j];
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for (j = 176; j < 179; j++)
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up[9 * B + j - 170] = eB[j];
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for (j = 179; j < 195; j++)
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hi[31 * B + j - 164] = eB[j];
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for (j = 195; j < 348; j++)
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di[306 * B + j - 42] = eB[j];
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}
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void gsm0503_mcs7_ul_burst_map(const ubit_t *di, ubit_t *eB,
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const ubit_t *hi, int B)
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{
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int j;
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int q[8] = { 1, 1, 1, 0, 0, 1, 1, 1, };
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for (j = 0; j < 153; j++)
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eB[j] = di[306 * B + j];
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for (j = 153; j < 174; j++)
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eB[j] = hi[40 * B + j - 153];
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for (j = 174; j < 176; j++)
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eB[j] = q[2 * B + j - 174];
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for (j = 176; j < 195; j++)
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eB[j] = hi[40 * B + j - 155];
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for (j = 195; j < 348; j++)
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eB[j] = di[306 * B + j - 42];
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}
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void gsm0503_mcs7_ul_burst_unmap(sbit_t *di, const sbit_t *eB,
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sbit_t *hi, int B)
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{
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int j;
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for (j = 0; j < 153; j++)
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di[306 * B + j] = eB[j];
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for (j = 153; j < 174; j++)
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hi[40 * B + j - 153] = eB[j];
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for (j = 176; j < 195; j++)
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hi[40 * B + j - 155] = eB[j];
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for (j = 195; j < 348; j++)
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di[306 * B + j - 42] = eB[j];
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}
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void gsm0503_mcs5_burst_swap(sbit_t *eB)
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{
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sbit_t t[14];
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t[0] = eB[155];
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t[1] = eB[158];
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t[2] = eB[161];
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t[3] = eB[164];
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t[4] = eB[167];
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t[5] = eB[170];
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t[6] = eB[173];
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t[7] = eB[195];
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t[8] = eB[196];
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t[9] = eB[198];
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t[10] = eB[199];
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t[11] = eB[201];
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t[12] = eB[202];
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t[13] = eB[204];
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eB[155] = eB[142];
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eB[158] = eB[144];
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eB[161] = eB[145];
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eB[164] = eB[147];
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eB[167] = eB[148];
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eB[170] = eB[150];
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eB[173] = eB[151];
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eB[195] = eB[176];
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eB[196] = eB[179];
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eB[198] = eB[182];
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eB[199] = eB[185];
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eB[201] = eB[188];
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eB[202] = eB[191];
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eB[204] = eB[194];
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eB[142] = t[0];
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eB[144] = t[1];
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eB[145] = t[2];
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eB[147] = t[3];
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eB[148] = t[4];
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eB[150] = t[5];
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eB[151] = t[6];
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eB[176] = t[7];
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eB[179] = t[8];
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eB[182] = t[9];
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eB[185] = t[10];
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eB[188] = t[11];
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eB[191] = t[12];
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eB[194] = t[13];
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}
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