FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/syn_filt.c @ 585:3c6bf0d26ee7 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
TW-TS-005 reader: fix maximum line length bug TW-TS-005 section 4.1 states: The maximum allowed length of each line is 80 characters, not including the OS-specific newline encoding. The implementation of this line length limit in the TW-TS-005 hex file reader function in the present suite was wrong, such that lines of the full maximum length could not be read. Fix it. Note that this bug affects comment lines too, not just actual RTP payloads. Neither Annex A nor Annex B features an RTP payload format that goes to the maximum of 40 bytes, but if a comment line goes to the maximum allowed length of 80 characters not including the terminating newline, the bug will be triggered, necessitating the present fix.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Feb 2025 07:49:28 +0000
parents 2af94ba0c075
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
394
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : syn_filt.c
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : Perform synthesis filtering through 1/A(z).
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 *
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 /*
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 * MODULE INCLUDE FILE AND VERSION ID
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 #include "namespace.h"
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 #include "syn_filt.h"
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 /*
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 * INCLUDE FILES
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 #include "typedef.h"
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 #include "basic_op.h"
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 #include "no_count.h"
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 #include "cnst.h"
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 /*
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 * LOCAL VARIABLES AND TABLES
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 /*
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 *--------------------------------------*
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 * Constants (defined in cnst.h *
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 *--------------------------------------*
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 * M : LPC order *
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 *--------------------------------------*
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 /*
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 * PUBLIC PROGRAM CODE
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 ********************************************************************************
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 void Syn_filt (
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 Word16 a[], /* (i) : a[M+1] prediction coefficients (M=10) */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 Word16 x[], /* (i) : input signal */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 Word16 y[], /* (o) : output signal */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 Word16 lg, /* (i) : size of filtering */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 Word16 mem[], /* (i/o) : memory associated with this filtering. */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 Word16 update /* (i) : 0=no update, 1=update of memory. */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 )
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 {
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 Word16 i, j;
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 Word32 s;
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 Word16 tmp[80]; /* This is usually done by memory allocation (lg+M) */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 Word16 *yy;
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 /* Copy mem[] to yy[] */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 yy = tmp; move16 ();
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 for (i = 0; i < M; i++)
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 {
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 *yy++ = mem[i]; move16 ();
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 }
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 /* Do the filtering. */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 for (i = 0; i < lg; i++)
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 {
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 s = L_mult (x[i], a[0]);
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 for (j = 1; j <= M; j++)
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 {
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 s = L_msu (s, a[j], yy[-j]);
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 }
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 s = L_shl (s, 3);
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 *yy++ = round (s); move16 ();
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 }
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 for (i = 0; i < lg; i++)
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 {
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 y[i] = tmp[i + M]; move16 ();
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 }
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 /* Update of memory if update==1 */
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 test ();
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 if (update != 0)
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 {
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 for (i = 0; i < M; i++)
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 {
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 mem[i] = y[lg - M + i]; move16 ();
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 }
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 }
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 return;
2af94ba0c075 libtwamr: integrate syn_filt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 }