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comparison libtwamr/ol_ltp.c @ 417:f17e42c63058

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libtwamr: integrate ol_ltp.c
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 07 May 2024 03:21:14 +0000
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416:48c7f8e8c9af 417:f17e42c63058
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 : ol_ltp.c
11 * Purpose : Compute the open loop pitch lag.
12 *
13 ********************************************************************************
14 */
15
16 /*
17 ********************************************************************************
18 * MODULE INCLUDE FILE AND VERSION ID
19 ********************************************************************************
20 */
21 #include "namespace.h"
22 #include "ol_ltp.h"
23
24 /*
25 ********************************************************************************
26 * INCLUDE FILES
27 ********************************************************************************
28 */
29 #include "typedef.h"
30 #include "cnst.h"
31 #include "pitch_ol.h"
32 #include "p_ol_wgh.h"
33 #include "no_count.h"
34 #include "basic_op.h"
35
36 /*
37 ********************************************************************************
38 * LOCAL VARIABLES AND TABLES
39 ********************************************************************************
40 */
41
42 /*
43 ********************************************************************************
44 * PUBLIC PROGRAM CODE
45 ********************************************************************************
46 */
47 int ol_ltp(
48 pitchOLWghtState *st, /* i/o : State struct */
49 vadState *vadSt, /* i/o : VAD state struct */
50 enum Mode mode, /* i : coder mode */
51 Word16 wsp[], /* i : signal used to compute the OL pitch, Q0 */
52 /* uses signal[-pit_max] to signal[-1] */
53 Word16 *T_op, /* o : open loop pitch lag, Q0 */
54 Word16 old_lags[], /* i : history with old stored Cl lags */
55 Word16 ol_gain_flg[], /* i : OL gain flag */
56 Word16 idx, /* i : index */
57 Flag dtx /* i : dtx flag; use dtx=1, do not use dtx=0 */
58 )
59 {
60 test ();
61 if (sub (mode, MR102) != 0 )
62 {
63 ol_gain_flg[0] = 0; move16 ();
64 ol_gain_flg[1] = 0; move16 ();
65 }
66
67 test (); test ();
68 if (sub (mode, MR475) == 0 || sub (mode, MR515) == 0 )
69 {
70 *T_op = Pitch_ol(vadSt, mode, wsp, PIT_MIN, PIT_MAX, L_FRAME, idx, dtx);
71 move16 ();
72 }
73 else
74 {
75 if ( sub (mode, MR795) <= 0 )
76 {
77 test();
78 *T_op = Pitch_ol(vadSt, mode, wsp, PIT_MIN, PIT_MAX, L_FRAME_BY2,
79 idx, dtx);
80 move16 ();
81 }
82 else if ( sub (mode, MR102) == 0 )
83 {
84 test(); test();
85 *T_op = Pitch_ol_wgh(st, vadSt, wsp, PIT_MIN, PIT_MAX, L_FRAME_BY2,
86 old_lags, ol_gain_flg, idx, dtx);
87 move16 ();
88 }
89 else
90 {
91 test(); test();
92 *T_op = Pitch_ol(vadSt, mode, wsp, PIT_MIN_MR122, PIT_MAX,
93 L_FRAME_BY2, idx, dtx);
94 move16 ();
95 }
96 }
97 return 0;
98 }