FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/d3_14pf.c @ 555:62943a1ad64e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
doc/FR1-Rx-DTX-detail: grammar fix
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 11 Oct 2024 00:22:47 +0000
parents f4a5545ea8b2
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
333
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : d3_14pf.c
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : Algebraic codebook decoder
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 *
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 /*
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 * MODULE INCLUDE FILE AND VERSION ID
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 #include "namespace.h"
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 #include "d3_14pf.h"
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 /*
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 * INCLUDE FILES
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 #include "typedef.h"
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 #include "basic_op.h"
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 #include "no_count.h"
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 #include "cnst.h"
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 /*
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 * LOCAL VARIABLES AND TABLES
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 #define NB_PULSE 3 /* number of pulses */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 /*
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 * PUBLIC PROGRAM CODE
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 ********************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 /*************************************************************************
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 *
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 * FUNCTION: decode_3i40_14bits (decod_ACELP())
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 *
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 * PURPOSE: Algebraic codebook decoder
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 *
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 *************************************************************************/
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 void decode_3i40_14bits(
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 Word16 sign, /* i : signs of 3 pulses. */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 Word16 index, /* i : Positions of the 3 pulses. */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 Word16 cod[] /* o : algebraic (fixed) codebook excitation */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 )
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 {
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 Word16 i, j;
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 Word16 pos[NB_PULSE];
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 /* Decode the positions */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 i = index & 7; logic16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 pos[0] = add(i, shl(i, 2)); /* pos0 =i*5 */ move16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 index = shr(index, 3);
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 j = index & 1; logic16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 index = shr(index, 1);
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 i = index & 7; logic16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 i = add(i, shl(i, 2)); /* pos1 =i*5+1+j*2 */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 i = add(i, 1);
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 j = shl(j, 1);
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 pos[1] = add(i, j); move16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 index = shr(index, 3);
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 j = index & 1; logic16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 index = shr(index, 1);
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 i = index & 7; logic16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 i = add(i, shl(i, 2)); /* pos2 =i*5+2+j*2 */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 i = add(i, 2);
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 j = shl(j, 1);
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 pos[2] = add(i, j); move16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 /* decode the signs and build the codeword */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 for (i = 0; i < L_SUBFR; i++) {
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 cod[i] = 0; move16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 }
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 for (j = 0; j < NB_PULSE; j++) {
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 i = sign & 1; logic16 ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 sign = shr(sign, 1);
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 test ();
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 if (i > 0) {
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 cod[pos[j]] = 8191; move16 (); /* +1.0 */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 } else {
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 cod[pos[j]] = -8192; move16 (); /* -1.0 */
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 }
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 }
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 return;
f4a5545ea8b2 libtwamr: integrate d3_14pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 }