FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/cl_ltp.c @ 484:20d44cfc219c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
CHANGES: list all new command line utils
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 20 May 2024 01:42:38 +0000
parents 85e9768d497f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
406
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : cl_ltp.c
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 /*
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 * MODULE INCLUDE FILE AND VERSION ID
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 #include "namespace.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 #include "cl_ltp.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 /*
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 * INCLUDE FILES
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 #include <stddef.h>
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 #include "typedef.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 #include "basic_op.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 #include "no_count.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 #include "oper_32b.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 #include "cnst.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 #include "convolve.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 #include "g_pitch.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 #include "pred_lt.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 #include "pitch_fr.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 #include "enc_lag3.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 #include "enc_lag6.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 #include "q_gain_p.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 #include "ton_stab.h"
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 /*
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 * LOCAL VARIABLES AND TABLES
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 /*
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 * PUBLIC PROGRAM CODE
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 *****************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 /*************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 * Function: cl_ltp_reset
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 * Purpose: Initializes state memory to zero
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 **************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 void cl_ltp_reset (clLtpState *state)
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 /* Reset pitch search states */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 Pitch_fr_reset (&state->pitchSt);
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 }
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 /*************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 * Function: cl_ltp
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 * Purpose: closed-loop fractional pitch search
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 **************************************************************************
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 int cl_ltp (
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 clLtpState *clSt, /* i/o : State struct */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 tonStabState *tonSt, /* i/o : State struct */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 enum Mode mode, /* i : coder mode */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 Word16 frameOffset, /* i : Offset to subframe */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 Word16 T_op[], /* i : Open loop pitch lags */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 Word16 *h1, /* i : Impulse response vector Q12 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 Word16 *exc, /* i/o : Excitation vector Q0 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 Word16 res2[], /* i/o : Long term prediction residual Q0 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 Word16 xn[], /* i : Target vector for pitch search Q0 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 Word16 lsp_flag, /* i : LSP resonance flag */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 Word16 xn2[], /* o : Target vector for codebook search Q0 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 Word16 y1[], /* o : Filtered adaptive excitation Q0 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 Word16 *T0, /* o : Pitch delay (integer part) */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 Word16 *T0_frac, /* o : Pitch delay (fractional part) */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 Word16 *gain_pit, /* o : Pitch gain Q14 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 Word16 g_coeff[], /* o : Correlations between xn, y1, & y2 */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 Word16 **anap, /* o : Analysis parameters */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 Word16 *gp_limit /* o : pitch gain limit */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 )
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 Word16 i;
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 Word16 index;
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 Word32 L_temp; /* temporarily variable */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 Word16 resu3; /* flag for upsample resolution */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 Word16 gpc_flag;
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 /*----------------------------------------------------------------------*
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 * Closed-loop fractional pitch search *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 *----------------------------------------------------------------------*/
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 *T0 = Pitch_fr(&clSt->pitchSt,
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 mode, T_op, exc, xn, h1,
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 L_SUBFR, frameOffset,
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 T0_frac, &resu3, &index); move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 *(*anap)++ = index; move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 /*-----------------------------------------------------------------*
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 * - find unity gain pitch excitation (adapitve codebook entry) *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 * with fractional interpolation. *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 * - find filtered pitch exc. y1[]=exc[] convolve with h1[]) *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 * - compute pitch gain and limit between 0 and 1.2 *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 * - update target vector for codebook search *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 * - find LTP residual. *
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 *-----------------------------------------------------------------*/
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 Pred_lt_3or6(exc, *T0, *T0_frac, L_SUBFR, resu3);
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 Convolve(exc, h1, y1, L_SUBFR);
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 /* gain_pit is Q14 for all modes */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 *gain_pit = G_pitch(mode, xn, y1, g_coeff, L_SUBFR); move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 /* check if the pitch gain should be limit due to resonance in LPC filter */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 gpc_flag = 0; move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 *gp_limit = MAX_16; move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 test (); test ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 if ((lsp_flag != 0) &&
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 (sub(*gain_pit, GP_CLIP) > 0))
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 gpc_flag = check_gp_clipping(tonSt, *gain_pit); move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 }
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 /* special for the MR475, MR515 mode; limit the gain to 0.85 to */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 /* cope with bit errors in the decoder in a better way. */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 test (); test ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 if ((sub (mode, MR475) == 0) || (sub (mode, MR515) == 0)) {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 test ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 if ( sub (*gain_pit, 13926) > 0) {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 *gain_pit = 13926; /* 0.85 in Q14 */ move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 }
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 test ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 if (gpc_flag != 0) {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 *gp_limit = GP_CLIP; move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 }
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 }
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 else
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 test ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 if (gpc_flag != 0)
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 *gp_limit = GP_CLIP; move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 *gain_pit = GP_CLIP; move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 }
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 /* For MR122, gain_pit is quantized here and not in gainQuant */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 if (test (), sub(mode, MR122)==0)
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 *(*anap)++ = q_gain_pitch(MR122, *gp_limit, gain_pit,
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 NULL, NULL);
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 }
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 }
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 /* update target vector und evaluate LTP residual */
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 for (i = 0; i < L_SUBFR; i++) {
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 L_temp = L_mult(y1[i], *gain_pit);
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 L_temp = L_shl(L_temp, 1);
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 xn2[i] = sub(xn[i], extract_h(L_temp)); move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 L_temp = L_mult(exc[i], *gain_pit);
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 L_temp = L_shl(L_temp, 1);
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 res2[i] = sub(res2[i], extract_h(L_temp)); move16 ();
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 }
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 return 0;
85e9768d497f libtwamr: integrate cl_ltp.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 }