kopia lustrzana https://github.com/ag1le/morse-wip
88 wiersze
2.4 KiB
C++
88 wiersze
2.4 KiB
C++
// ----------------------------------------------------------------------------
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// sprob.c -- bayesian morse code decoder
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//
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// Copyright (C) 2012-2014
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// (C) Mauri Niininen, AG1LE
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//
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// This file is part of Bayesian Morse code decoder
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// bmorse 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 3 of the License, or
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// (at your option) any later version.
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//
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// bmorse 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
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// along with bmorse. If not, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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#include "bmorse.h"
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#include <stdio.h>
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extern char debug;
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extern PARAMS params;
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int morse::sprob_(real *p, integer *isave, integer *ilrsav, real *pelm, integer *khat, real *spdhat, real *px)
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{
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/* Local variables */
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integer i, j, k, m, n;
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real pselem[6];
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static int initial = 0;
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/* SPROB COMPUTES THE POSTERIOR PROBS OF THE ELEMENT */
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/* STATES, DATA RATE STATES, AND KEYSTATES BY SUMMING */
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/* OVER THE APPROPRIATE PATHS. */
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/* VARIABLE: */
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/* P- INPUT PATH PROBABILITIES */
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/* ISAVE- NUMBER OF PATHS SAVED */
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/* PSELEM- OUTPUT ELEMENT PROB */
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/* SPDHAT- OUTPUT SPEED ESTIMATE (DATA RATE WPM) */
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/* PX- OUTPUT KEYSTATE PROBABILITY */
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/* INITIALIZE: */
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/* Function Body */
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*spdhat = 0.f;
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*px = 0.f;
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/* FOR EACH STATE EXTENSION OF PATH M: */
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/* OBTAIN ELEMENT STATE PROBS,KEYSTATE PROBS,SPEED EST: */
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for (k = 1; k <= 6; ++k) {
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pselem[k - 1] = 0.f;
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for (i = 1; i <= 5; ++i) {
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n = (i - 1) * 6 + k;
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for (m = 1; m <= *isave; ++m) {
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j = (m - 1) * 30 + n;
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pselem[k - 1] += p[j-1];
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*spdhat += ilrsav[j-1] * p[j-1];
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if (k <= 2) {
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*px += p[j-1];
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}
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}
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}
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}
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*pelm = 0.f;
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for (k = 1; k <= 6; ++k) {
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// IF WANT ELEMENT PROBABILITIES BY SAMPLE ENABLE debug flag -var
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if (params.print_variables && initial) {
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printf("\t%f",pselem[k - 1]);
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}
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if (pselem[k - 1] >= *pelm) {
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*pelm = pselem[k - 1];
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*khat = k;
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}
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}
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if (params.print_variables && initial)
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printf("\t");
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initial = 1;
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return 0;
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} /* sprob_ */
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