FreeCalypso > hg > gsm-codec-lib

annotate libgsmefr/reorder.c @ 282:9ee8ad3d4d30

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frtest: rm gsmfr-hand-test and gsmfr-max-out utils These hack programs were never properly documented and were written only as part of a debug chase, in pursuit of a bug that ultimately turned out to be in our then-hacky patch to osmo-bts-sysmo, before beginning of proper patches in Osmocom. These hack programs need to be dropped from the present sw package because they depend on old libgsm, and we are eliminating that dependency.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 14 Apr 2024 05:44:47 +0000
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children
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1 /*************************************************************************
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2 *
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3 * FUNCTION: Reorder_lsf()
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4 *
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5 * PURPOSE: To make sure that the LSFs are properly ordered and to keep a
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6 * certain minimum distance between adjacent LSFs. *
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7 * The LSFs are in the frequency range 0-0.5 and represented in Q15
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8 *
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9 *************************************************************************/
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11 #include "gsm_efr.h"
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12 #include "typedef.h"
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13 #include "namespace.h"
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14 #include "basic_op.h"
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15 #include "no_count.h"
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16 #include "sig_proc.h"
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18 void Reorder_lsf (
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19 Word16 *lsf, /* (i/o) : vector of LSFs (range: 0<=val<=0.5) */
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20 Word16 min_dist, /* (i) : minimum required distance */
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21 Word16 n /* (i) : LPC order */
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22 )
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23 {
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24 Word16 i;
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25 Word16 lsf_min;
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27 lsf_min = min_dist; move16 ();
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28 for (i = 0; i < n; i++)
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29 {
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30 test ();
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31 if (lsf[i] < lsf_min)
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32 {
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33 lsf[i] = lsf_min; move16 ();
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34 }
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35 lsf_min = add (lsf[i], min_dist);
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36 }
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37 }