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comparison libtwamr/d_gain_p.c @ 340:e18452a4fbac

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libtwamr: integrate d_gain_p.c
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 18 Apr 2024 23:45:25 +0000
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339:a723d9f9f697 340:e18452a4fbac
1 /*
2 ********************************************************************************
3 *
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
5 * R99 Version 3.3.0
6 * REL-4 Version 4.1.0
7 *
8 ********************************************************************************
9 *
10 * File : d_gain_p.c
11 *
12 ********************************************************************************
13 */
14
15
16 /*
17 ********************************************************************************
18 * MODULE INCLUDE FILE AND VERSION ID
19 ********************************************************************************
20 */
21 #include "namespace.h"
22 #include "d_gain_p.h"
23
24 /*
25 ********************************************************************************
26 * INCLUDE FILES
27 ********************************************************************************
28 */
29 #include "tw_amr.h"
30 #include "typedef.h"
31 #include "basic_op.h"
32 #include "oper_32b.h"
33 #include "no_count.h"
34 #include "cnst.h"
35 #include "gains_tab.h"
36
37 /*
38 ********************************************************************************
39 * PUBLIC PROGRAM CODE
40 ********************************************************************************
41 */
42
43 /*
44 **************************************************************************
45 *
46 * Function : d_gain_pitch
47 * Purpose : Decodes the pitch gain using the received index.
48 * output is in Q14
49 *
50 **************************************************************************
51 */
52 Word16 d_gain_pitch ( /* return value: gain (Q14) */
53 enum Mode mode, /* i : AMR mode */
54 Word16 index /* i : index of quantization */
55 )
56 {
57 Word16 gain;
58
59 test ();
60 if (sub(mode, MR122) == 0)
61 {
62 /* clear 2 LSBits */
63 gain = shl (shr (qua_gain_pitch[index], 2), 2); move16 ();
64 }
65 else
66 {
67 gain = qua_gain_pitch[index]; move16 ();
68 }
69
70 return gain;
71 }