mirror of https://github.com/PentHertz/srsLTE.git
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
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/*
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* Copyright (c) 2013, Ismael Gomez-Miguelez <gomezi@tcd.ie>.
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* This file is part of OSLD-lib (http://https://github.com/ismagom/osld-lib)
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*
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* OSLD-lib 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 published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* OSLD-lib 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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* You should have received a copy of the GNU Lesser General Public License
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* along with OSLD-lib. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef VITERBI_
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#define VITERBI_
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#include <stdbool.h>
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typedef enum {
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viterbi_27, viterbi_29, viterbi_37, viterbi_39
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}viterbi_type_t;
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typedef struct {
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void *ptr;
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int R;
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int K;
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unsigned int framebits;
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bool tail_biting;
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int poly[3];
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int (*decode) (void*, float*, char*);
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void (*free) (void*);
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}viterbi_t;
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int viterbi_init(viterbi_t *q, viterbi_type_t type, int poly[3], int framebits, bool tail_bitting);
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void viterbi_free(viterbi_t *q);
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int viterbi_decode(viterbi_t *q, float *symbols, char *data);
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/* High-level API */
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typedef struct {
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viterbi_t obj;
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struct viterbi_init {
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int rate;
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int constraint_length;
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int tail_bitting;
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int generator_0;
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int generator_1;
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int generator_2;
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int frame_length;
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} init;
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float *input;
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int in_len;
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char *output;
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int out_len;
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}viterbi_hl;
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int viterbi_initialize(viterbi_hl* h);
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int viterbi_work(viterbi_hl* hl);
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int viterbi_stop(viterbi_hl* h);
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#endif
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