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77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2014 The libLTE Developers. See the
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* COPYRIGHT file at the top-level directory of this distribution.
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*
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* \section LICENSE
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*
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* This file is part of the libLTE library.
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*
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* libLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* libLTE 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 Lesser General Public License for more details.
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*
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* A copy of the GNU Lesser General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include <stdlib.h>
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#include <strings.h>
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#include <assert.h>
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#include "liblte/phy/utils/bit.h"
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#include "liblte/phy/modem/mod.h"
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/** Low-level API */
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int mod_modulate(modem_table_t* q, const uint8_t *bits, cf_t* symbols, uint32_t nbits) {
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uint32_t i,j,idx;
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uint8_t *b_ptr=(uint8_t*) bits;
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j=0;
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for (i=0;i<nbits;i+=q->nbits_x_symbol) {
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idx = bit_unpack(&b_ptr,q->nbits_x_symbol);
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if (idx < q->nsymbols) {
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symbols[j] = q->symbol_table[idx];
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} else {
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return LIBLTE_ERROR;
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}
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j++;
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}
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return j;
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}
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/* High-Level API */
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int mod_initialize(mod_hl* hl) {
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modem_table_init(&hl->obj);
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if (modem_table_lte(&hl->obj,hl->init.std,false)) {
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return -1;
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}
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return 0;
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}
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int mod_work(mod_hl* hl) {
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int ret = mod_modulate(&hl->obj,hl->input,hl->output,hl->in_len);
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hl->out_len = ret;
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return 0;
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}
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int mod_stop(mod_hl* hl) {
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modem_table_free(&hl->obj);
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return 0;
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}
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