FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/q_gain_p.c @ 529:79cd992de3ad

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
libgsmfr2: API definitions for TFO transform
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 19 Sep 2024 08:07:26 +0000
parents a01de4e40540
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
369
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : q_gain_p.c
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : Scalar quantization of the pitch gain
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 *
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 ********************************************************************************
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 /*
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 ********************************************************************************
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 * MODULE INCLUDE FILE AND VERSION ID
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 ********************************************************************************
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 #include "namespace.h"
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 #include "q_gain_p.h"
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 /*
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 ********************************************************************************
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 * INCLUDE FILES
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 ********************************************************************************
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 #include "tw_amr.h"
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 #include "typedef.h"
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 #include "basic_op.h"
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 #include "oper_32b.h"
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 #include "no_count.h"
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 #include "cnst.h"
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 #include "gains_tab.h"
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 /*
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 ********************************************************************************
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 * PUBLIC PROGRAM CODE
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 ********************************************************************************
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 Word16 q_gain_pitch ( /* Return index of quantization */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 enum Mode mode, /* i : AMR mode */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 Word16 gp_limit, /* i : pitch gain limit */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 Word16 *gain, /* i/o: Pitch gain (unquant/quant), Q14 */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 Word16 gain_cand[], /* o : pitch gain candidates (3), MR795 only, Q14 */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 Word16 gain_cind[] /* o : pitch gain cand. indices (3),MR795 only, Q0 */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 )
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 Word16 i, index, err, err_min;
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 err_min = abs_s (sub (*gain, qua_gain_pitch[0]));
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 index = 0; move16 ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 for (i = 1; i < NB_QUA_PITCH; i++)
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 test ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 if (sub (qua_gain_pitch[i], gp_limit) <= 0)
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 err = abs_s (sub (*gain, qua_gain_pitch[i]));
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 test ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 if (sub (err, err_min) < 0)
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 err_min = err; move16 ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 index = i; move16 ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 test ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 if (sub (mode, MR795) == 0)
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 /* in MR795 mode, compute three gain_pit candidates around the index
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 * found in the quantization loop: the index found and the two direct
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 * neighbours, except for the extreme cases (i=0 or i=NB_QUA_PITCH-1),
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 * where the direct neighbour and the neighbour to that is used.
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 Word16 ii;
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 test ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 if (index == 0)
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 ii = index; move16 ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 else
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 test (); test ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 if ( sub (index, NB_QUA_PITCH-1) == 0
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 || sub (qua_gain_pitch[index+1], gp_limit) > 0)
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 ii = sub (index, 2);
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 else
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 ii = sub (index, 1);
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 /* store candidate indices and values */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 for (i = 0; i < 3; i++)
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 gain_cind[i] = ii; move16 ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 gain_cand[i] = qua_gain_pitch[ii]; move16 ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 ii = add (ii, 1);
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 *gain = qua_gain_pitch[index]; move16 ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 else
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 /* in MR122 mode, just return the index and gain pitch found.
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 * If bitexactness is required, mask away the two LSBs (because
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 * in the original EFR, gain_pit was scaled Q12)
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 test ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 if (sub(mode, MR122) == 0)
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 /* clear 2 LSBits */
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 *gain = qua_gain_pitch[index] & 0xFFFC; logic16 (); move16 ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 else
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 {
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 *gain = qua_gain_pitch[index]; move16 ();
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 }
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 return index;
a01de4e40540 libtwamr: integrate q_gain_p.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 }