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comparison libtwamr/reorder.c @ 344:05a46720af0f

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libtwamr: integrate d_plsf_3.c
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 19 Apr 2024 01:23:15 +0000
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343:3f574255c3aa 344:05a46720af0f
1 /*
2 ********************************************************************************
3 *
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
5 * R99 Version 3.3.0
6 * REL-4 Version 4.1.0
7 *
8 ********************************************************************************
9 *
10 * File : reorder.c
11 * Purpose : To make sure that the LSFs are properly ordered
12 * : and to keep a certain minimum distance between
13 * : adjacent LSFs.
14 *
15 ********************************************************************************
16 */
17 /*
18 ********************************************************************************
19 * MODULE INCLUDE FILE AND VERSION ID
20 ********************************************************************************
21 */
22 #include "namespace.h"
23 #include "reorder.h"
24
25 /*
26 ********************************************************************************
27 * INCLUDE FILES
28 ********************************************************************************
29 */
30 #include "typedef.h"
31 #include "basic_op.h"
32 #include "no_count.h"
33
34 /*
35 ********************************************************************************
36 * LOCAL VARIABLES AND TABLES
37 ********************************************************************************
38 */
39
40 /*
41 ********************************************************************************
42 * PUBLIC PROGRAM CODE
43 ********************************************************************************
44 */
45 /*************************************************************************
46 *
47 * FUNCTION: Reorder_lsf()
48 *
49 * PURPOSE: To make sure that the LSFs are properly ordered and to keep a
50 * certain minimum distance between adjacent LSFs.
51 *
52 * The LSFs are in the frequency range 0-0.5 and represented in Q15
53 *
54 *************************************************************************/
55 void Reorder_lsf (
56 Word16 *lsf, /* (i/o) : vector of LSFs (range: 0<=val<=0.5) */
57 Word16 min_dist, /* (i) : minimum required distance */
58 Word16 n /* (i) : LPC order */
59 )
60 {
61 Word16 i;
62 Word16 lsf_min;
63
64 lsf_min = min_dist; move16 ();
65 for (i = 0; i < n; i++)
66 {
67 test ();
68 if (sub (lsf[i], lsf_min) < 0)
69 {
70 lsf[i] = lsf_min; move16 ();
71 }
72 lsf_min = add (lsf[i], min_dist);
73 }
74 }