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comparison libtwamr/cbsearch.c @ 328:4614f1a97e1a

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libtwamr: integrate cbsearch.c
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 18 Apr 2024 20:35:02 +0000
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327:2df212a012af 328:4614f1a97e1a
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 : cbsearch.c
11 * Purpose : Inovative codebook search (find index and gain)
12 *
13 *****************************************************************************
14 */
15
16 /*
17 *****************************************************************************
18 * MODULE INCLUDE FILE AND VERSION ID
19 *****************************************************************************
20 */
21 #include "namespace.h"
22 #include "cbsearch.h"
23
24 /*
25 *****************************************************************************
26 * INCLUDE FILES
27 *****************************************************************************
28 */
29 #include "tw_amr.h"
30 #include "typedef.h"
31 #include "c2_9pf.h"
32 #include "c2_11pf.h"
33 #include "c3_14pf.h"
34 #include "c4_17pf.h"
35 #include "c8_31pf.h"
36 #include "c1035pf.h"
37 #include "basic_op.h"
38 #include "no_count.h"
39 #include "cnst.h"
40
41 /*
42 *****************************************************************************
43 * PUBLIC PROGRAM CODE
44 *****************************************************************************
45 */
46 int cbsearch(Word16 x[], /* i : target vector, Q0 */
47 Word16 h[], /* i : impulse response of weighted synthesis */
48 /* filter h[-L_subfr..-1] must be set to */
49 /* zero. Q12 */
50 Word16 T0, /* i : Pitch lag */
51 Word16 pitch_sharp, /* i : Last quantized pitch gain, Q14 */
52 Word16 gain_pit, /* i : Pitch gain, Q14 */
53 Word16 res2[], /* i : Long term prediction residual, Q0 */
54 Word16 code[], /* o : Innovative codebook, Q13 */
55 Word16 y[], /* o : filtered fixed codebook excitation, Q12 */
56 Word16 **anap, /* o : Signs of the pulses */
57 enum Mode mode,/* i : coder mode */
58 Word16 subNr) /* i : subframe number */
59 {
60 Word16 index;
61 Word16 i, temp, pit_sharpTmp;
62
63 /* For MR74, the pre and post CB pitch sharpening is included in the
64 * codebook search routine, while for MR122 is it not.
65 */
66
67 test (); test ();
68 if ((sub (mode, MR475) == 0) || (sub (mode, MR515) == 0))
69 { /* MR475, MR515 */ move16 ();
70 *(*anap)++ = code_2i40_9bits(subNr, x, h, T0, pitch_sharp,
71 code, y, &index);
72 *(*anap)++ = index; /* sign index */ move16 ();
73 }
74 else if (sub (mode, MR59) == 0)
75 { /* MR59 */
76 test (); move16 ();
77 *(*anap)++ = code_2i40_11bits(x, h, T0, pitch_sharp, code, y, &index);
78 *(*anap)++ = index; /* sign index */ move16 ();
79 }
80 else if (sub (mode, MR67) == 0)
81 { /* MR67 */
82 test (); test (); move16 ();
83 *(*anap)++ = code_3i40_14bits(x, h, T0, pitch_sharp, code, y, &index);
84 *(*anap)++ = index; /* sign index */ move16 ();
85 }
86 else if (sub (mode, MR74) == 0 || sub (mode, MR795) == 0)
87 { /* MR74, MR795 */
88 test (); test (); test (); move16 ();
89 *(*anap)++ = code_4i40_17bits(x, h, T0, pitch_sharp, code, y, &index);
90 *(*anap)++ = index; /* sign index */ move16 ();
91 }
92 else if (sub (mode, MR102) == 0)
93 { /* MR102 */
94 test (); test (); test ();
95 /*-------------------------------------------------------------*
96 * - include pitch contribution into impulse resp. h1[] *
97 *-------------------------------------------------------------*/
98 /* pit_sharpTmp = pit_sharp; */
99 /* if (pit_sharpTmp > 1.0) pit_sharpTmp = 1.0; */
100 pit_sharpTmp = shl (pitch_sharp, 1);
101 for (i = T0; i < L_SUBFR; i++)
102 {
103 temp = mult(h[i - T0], pit_sharpTmp);
104 h[i] = add(h[i], temp); move16 ();
105 }
106
107 /*--------------------------------------------------------------*
108 * - Innovative codebook search (find index and gain) *
109 *--------------------------------------------------------------*/
110 code_8i40_31bits (x, res2, h, code, y, *anap);
111 *anap += 7; add(0,0);
112
113 /*-------------------------------------------------------*
114 * - Add the pitch contribution to code[]. *
115 *-------------------------------------------------------*/
116 for (i = T0; i < L_SUBFR; i++)
117 {
118 temp = mult (code[i - T0], pit_sharpTmp);
119 code[i] = add (code[i], temp); move16 ();
120 }
121 }
122 else
123 { /* MR122 */
124 /*-------------------------------------------------------------*
125 * - include pitch contribution into impulse resp. h1[] *
126 *-------------------------------------------------------------*/
127 test (); test (); test ();
128
129 /* pit_sharpTmp = gain_pit; */
130 /* if (pit_sharpTmp > 1.0) pit_sharpTmp = 1.0; */
131 pit_sharpTmp = shl (gain_pit, 1);
132
133 for (i = T0; i < L_SUBFR; i++)
134 {
135 temp = mult(h[i - T0], pit_sharpTmp);
136 h[i] = add(h[i], temp); move16 ();
137 }
138 /*--------------------------------------------------------------*
139 * - Innovative codebook search (find index and gain) *
140 *--------------------------------------------------------------*/
141
142 code_10i40_35bits (x, res2, h, code, y, *anap);
143 *anap += 10; add(0,0);
144
145 /*-------------------------------------------------------*
146 * - Add the pitch contribution to code[]. *
147 *-------------------------------------------------------*/
148 for (i = T0; i < L_SUBFR; i++)
149 {
150 temp = mult (code[i - T0], pit_sharpTmp);
151 code[i] = add (code[i], temp); move16 ();
152 }
153 }
154
155 return 0;
156 }