FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/hp_max.c @ 521:68fe269b4316

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
gsmx-to-tw5a: actually write to the output file
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 19 Sep 2024 02:21:08 +0000
parents 176a44ff94a1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
379
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : hp_max.c
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : Find the maximum correlation of scal_sig[] in a given
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 * delay range.
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 *
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 ********************************************************************************
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 /*
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 ********************************************************************************
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 * MODULE INCLUDE FILE AND VERSION ID
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 ********************************************************************************
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 #include "namespace.h"
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 #include "hp_max.h"
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 /*
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 ********************************************************************************
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 * INCLUDE FILES
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 ********************************************************************************
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 #include "typedef.h"
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 #include "basic_op.h"
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 #include "oper_32b.h"
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 #include "no_count.h"
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 #include "cnst.h"
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 /*
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 ********************************************************************************
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 * PUBLIC PROGRAM CODE
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 ********************************************************************************
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 Word16 hp_max (
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 Word32 corr[], /* i : correlation vector. */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 Word16 scal_sig[], /* i : scaled signal. */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 Word16 L_frame, /* i : length of frame to compute pitch */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 Word16 lag_max, /* i : maximum lag */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 Word16 lag_min, /* i : minimum lag */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 Word16 *cor_hp_max) /* o : max high-pass filtered norm. correlation */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 {
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 Word16 i;
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 Word16 *p, *p1;
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 Word32 max, t0, t1;
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 Word16 max16, t016, cor_max;
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 Word16 shift, shift1, shift2;
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 max = MIN_32; move32 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 t0 = 0L; move32 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 for (i = lag_max-1; i > lag_min; i--)
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 {
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 /* high-pass filtering */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 t0 = L_sub (L_sub(L_shl(corr[-i], 1), corr[-i-1]), corr[-i+1]);
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 t0 = L_abs (t0);
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 test ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 if (L_sub (t0, max) >= 0)
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 {
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 max = t0; move32 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 }
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 }
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 /* compute energy */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 p = scal_sig; move16 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 p1 = &scal_sig[0]; move16 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 t0 = 0L; move32 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 for (i = 0; i < L_frame; i++, p++, p1++)
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 {
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 t0 = L_mac (t0, *p, *p1);
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 }
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 p = scal_sig; move16 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 p1 = &scal_sig[-1]; move16 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 t1 = 0L; move32 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 for (i = 0; i < L_frame; i++, p++, p1++)
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 {
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 t1 = L_mac (t1, *p, *p1);
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 }
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 /* high-pass filtering */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 t0 = L_sub(L_shl(t0, 1), L_shl(t1, 1));
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 t0 = L_abs (t0);
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 /* max/t0 */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 shift1 = sub(norm_l(max), 1);
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 max16 = extract_h(L_shl(max, shift1));
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 shift2 = norm_l(t0);
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 t016 = extract_h(L_shl(t0, shift2));
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 test ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 if (t016 != 0)
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 {
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 cor_max = div_s(max16, t016);
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 }
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 else
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 {
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 cor_max = 0; move16 ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 }
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 shift = sub(shift1, shift2);
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 test ();
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 if (shift >= 0)
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 {
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 *cor_hp_max = shr(cor_max, shift); move16 (); /* Q15 */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 }
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 else
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 {
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 *cor_hp_max = shl(cor_max, negate(shift)); move16 (); /* Q15 */
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 }
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 return 0;
176a44ff94a1 libtwamr: integrate hp_max.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 }