FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/cor_h.c @ 480:332397bc80aa

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
doc/AMR-library-API: document public const data items
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 19 May 2024 23:18:17 +0000
parents 5401aaf7acb0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
315
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 *****************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ******************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : cor_h.c
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : correlation functions for codebook search
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 *****************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 /*
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 *****************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 * MODULE INCLUDE FILE AND VERSION ID
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 *****************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 #include "namespace.h"
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 #include "cor_h.h"
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 /*
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 *****************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 * INCLUDE FILES
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 *****************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 #include "typedef.h"
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 #include "basic_op.h"
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 #include "no_count.h"
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 #include "inv_sqrt.h"
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 #include "cnst.h"
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 /*
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 *****************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 * PUBLIC PROGRAM CODE
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 *****************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 /*************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 * FUNCTION: cor_h_x()
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 * PURPOSE: Computes correlation between target signal "x[]" and
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 * impulse response"h[]".
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 * DESCRIPTION:
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 * The correlation is given by:
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 * d[n] = sum_{i=n}^{L-1} x[i] h[i-n] n=0,...,L-1
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 * d[n] is normalized such that the sum of 5 maxima of d[n] corresponding
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 * to each position track does not saturate.
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 *************************************************************************/
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 void cor_h_x (
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 Word16 h[], /* (i): impulse response of weighted synthesis filter */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 Word16 x[], /* (i): target */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 Word16 dn[], /* (o): correlation between target and h[] */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 Word16 sf /* (i): scaling factor: 2 for 12.2, 1 for others */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 )
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 cor_h_x2(h, x, dn, sf, NB_TRACK, STEP);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 /*************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 * FUNCTION: cor_h_x2()
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 * PURPOSE: Computes correlation between target signal "x[]" and
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 * impulse response"h[]".
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 * DESCRIPTION:
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 * See cor_h_x, d[n] can be normalized regards to sum of the
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 * five MR122 maxima or the four MR102 maxima.
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 *************************************************************************/
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 void cor_h_x2 (
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 Word16 h[], /* (i): impulse response of weighted synthesis filter */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 Word16 x[], /* (i): target */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 Word16 dn[], /* (o): correlation between target and h[] */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 Word16 sf, /* (i): scaling factor: 2 for 12.2, 1 for others */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 Word16 nb_track,/* (i): the number of ACB tracks */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 Word16 step /* (i): step size from one pulse position to the next
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 in one track */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 )
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 Word16 i, j, k;
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 Word32 s, y32[L_CODE], max, tot;
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 /* first keep the result on 32 bits and find absolute maximum */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 tot = 5; move32 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 for (k = 0; k < nb_track; k++)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 max = 0; move32 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 for (i = k; i < L_CODE; i += step)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 s = 0; move32 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 for (j = i; j < L_CODE; j++)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 s = L_mac (s, x[j], h[j - i]);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 y32[i] = s; move32 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 s = L_abs (s);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 test ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 if (L_sub (s, max) > (Word32) 0L)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 max = s; move32 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 tot = L_add (tot, L_shr (max, 1));
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 j = sub (norm_l (tot), sf);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 for (i = 0; i < L_CODE; i++)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 dn[i] = round (L_shl (y32[i], j)); move16 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 /*************************************************************************
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 * FUNCTION: cor_h()
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 * PURPOSE: Computes correlations of h[] needed for the codebook search;
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 * and includes the sign information into the correlations.
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 * DESCRIPTION: The correlations are given by
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 * rr[i][j] = sum_{n=i}^{L-1} h[n-i] h[n-j]; i>=j; i,j=0,...,L-1
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 * and the sign information is included by
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 * rr[i][j] = rr[i][j]*sign[i]*sign[j]
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 *
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 *************************************************************************/
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 void cor_h (
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 Word16 h[], /* (i) : impulse response of weighted synthesis
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 filter */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 Word16 sign[], /* (i) : sign of d[n] */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 Word16 rr[][L_CODE] /* (o) : matrix of autocorrelation */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 )
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 Word16 i, j, k, dec, h2[L_CODE];
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 Word32 s;
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 /* Scaling for maximum precision */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 s = 2; move32 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 for (i = 0; i < L_CODE; i++)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 s = L_mac (s, h[i], h[i]);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 j = sub (extract_h (s), 32767);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 test ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 if (j == 0)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 for (i = 0; i < L_CODE; i++)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 h2[i] = shr (h[i], 1); move16 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 else
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 s = L_shr (s, 1);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 k = extract_h (L_shl (Inv_sqrt (s), 7));
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 k = mult (k, 32440); /* k = 0.99*k */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 for (i = 0; i < L_CODE; i++)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 h2[i] = round (L_shl (L_mult (h[i], k), 9));
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 move16 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 /* build matrix rr[] */
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 s = 0; move32 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 i = L_CODE - 1;
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 for (k = 0; k < L_CODE; k++, i--)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 s = L_mac (s, h2[k], h2[k]);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 rr[i][i] = round (s); move16 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 for (dec = 1; dec < L_CODE; dec++)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 s = 0; move32 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 j = L_CODE - 1;
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 i = sub (j, dec);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 for (k = 0; k < (L_CODE - dec); k++, i--, j--)
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 {
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 s = L_mac (s, h2[k], h2[k + dec]);
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 rr[j][i] = mult (round (s), mult (sign[i], sign[j]));
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 move16 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 rr[i][j] = rr[j][i]; move16 ();
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 }
5401aaf7acb0 libtwamr: integrate cor_h.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 }