FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/d_gain_c.c @ 536:a3300483ae74

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
doc/FR1-library-API: document return value from gsmfr_tfo_xfrm_*
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 21 Sep 2024 20:48:58 +0000
parents a723d9f9f697
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
339
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : d_gain_c.c
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 ********************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 /*
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 ********************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 * MODULE INCLUDE FILE AND VERSION ID
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 ********************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 #include "namespace.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 #include "d_gain_c.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 /*
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 ********************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 * INCLUDE FILES
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 ********************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 #include "tw_amr.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 #include "typedef.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 #include "basic_op.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 #include "oper_32b.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 #include "no_count.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 #include "cnst.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 #include "log2.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 #include "pow2.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 #include "gc_pred.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 #include "gains_tab.h"
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 /*
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 ********************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 * PUBLIC PROGRAM CODE
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 ********************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 /*
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 **************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 * Function : d_gain_code
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 * Purpose : Decode the fixed codebook gain using the received index.
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 **************************************************************************
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 void d_gain_code (
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 gc_predState *pred_state, /* i/o : MA predictor state */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 enum Mode mode, /* i : AMR mode (MR795 or MR122) */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 Word16 index, /* i : received quantization index */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 Word16 code[], /* i : innovation codevector */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 Word16 *gain_code /* o : decoded innovation gain */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 )
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 {
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 Word16 gcode0, exp, frac;
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 const Word16 *p;
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 Word16 qua_ener_MR122, qua_ener;
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 Word16 exp_inn_en;
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 Word16 frac_inn_en;
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 Word32 L_tmp;
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 /*-------------- Decode codebook gain ---------------*/
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 /*-------------------------------------------------------------------*
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 * predict codebook gain *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 * ~~~~~~~~~~~~~~~~~~~~~ *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 * gc0 = Pow2(int(d)+frac(d)) *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 * = 2^exp + 2^frac *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 * *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 *-------------------------------------------------------------------*/
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 gc_pred(pred_state, mode, code, &exp, &frac,
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 &exp_inn_en, &frac_inn_en);
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 p = &qua_gain_code[add (add (index, index), index)];
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 /* Different scalings between MR122 and the other modes */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 test ();
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 if (sub(mode, MR122) == 0)
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 {
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 gcode0 = extract_l (Pow2 (exp, frac)); /* predicted gain */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 gcode0 = shl (gcode0, 4);
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 *gain_code = shl (mult (gcode0, *p++), 1); move16 ();
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 }
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 else
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 {
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 gcode0 = extract_l (Pow2 (14, frac));
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 L_tmp = L_mult(*p++, gcode0);
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 L_tmp = L_shr(L_tmp, sub(9, exp));
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 *gain_code = extract_h(L_tmp); /* Q1 */
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 }
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 /*-------------------------------------------------------------------*
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 * update table of past quantized energies *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 *-------------------------------------------------------------------*/
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 qua_ener_MR122 = *p++; move16();
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 qua_ener = *p++; move16();
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 gc_pred_update(pred_state, qua_ener_MR122, qua_ener);
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 return;
a723d9f9f697 libtwamr: integrate d_gain_c.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 }