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comparison libgsmefr/reorder.c @ 53:49dd1ac8e75b

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libgsmefr: import most *.c files from ETSI source
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 25 Nov 2022 16:18:21 +0000
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children 9ad6bf2f1ee1
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52:988fd7ff514f 53:49dd1ac8e75b
1 /*************************************************************************
2 *
3 * FUNCTION: Reorder_lsf()
4 *
5 * PURPOSE: To make sure that the LSFs are properly ordered and to keep a
6 * certain minimum distance between adjacent LSFs. *
7 * The LSFs are in the frequency range 0-0.5 and represented in Q15
8 *
9 *************************************************************************/
10
11 #include "typedef.h"
12 #include "basic_op.h"
13 #include "count.h"
14
15 void Reorder_lsf (
16 Word16 *lsf, /* (i/o) : vector of LSFs (range: 0<=val<=0.5) */
17 Word16 min_dist, /* (i) : minimum required distance */
18 Word16 n /* (i) : LPC order */
19 )
20 {
21 Word16 i;
22 Word16 lsf_min;
23
24 lsf_min = min_dist; move16 ();
25 for (i = 0; i < n; i++)
26 {
27 test ();
28 if (sub (lsf[i], lsf_min) < 0)
29 {
30 lsf[i] = lsf_min; move16 ();
31 }
32 lsf_min = add (lsf[i], min_dist);
33 }
34 }