FreeCalypso > hg > gsm-codec-lib

annotate libgsmfr2/short_term.c @ 346:9a8b5c9a3b4a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
libgsmefr/namespace.h: norm_s was missed via typo
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 19 Apr 2024 09:07:39 +0000
parents d320a8fa3392
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
271
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * This C source file has been adapted from TU-Berlin libgsm source,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * original notice follows:
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 *
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * Universitaet Berlin. See the accompanying file "COPYRIGHT" for
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 * details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include <stdint.h>
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include "tw_gsmfr.h"
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 #include "typedef.h"
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 #include "ed_state.h"
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 #include "ed_internal.h"
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 /*
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 * SHORT TERM ANALYSIS FILTERING SECTION
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 /* 4.2.8 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 static void Decoding_of_the_coded_Log_Area_Ratios (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 const word * LARc, /* coded log area ratio [0..7] IN */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 word * LARpp) /* out: decoded .. */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 register word temp1 /* , temp2 */;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 register long ltmp; /* for GSM_ADD */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 /* This procedure requires for efficient implementation
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 * two tables.
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 *
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 * INVA[1..8] = integer( (32768 * 8) / real_A[1..8])
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 * MIC[1..8] = minimum value of the LARc[1..8]
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 /* Compute the LARpp[1..8]
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 /* for (i = 1; i <= 8; i++, B++, MIC++, INVA++, LARc++, LARpp++) {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 *
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 * temp1 = GSM_ADD( *LARc, *MIC ) << 10;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 * temp2 = *B << 1;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 * temp1 = GSM_SUB( temp1, temp2 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 *
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 * assert(*INVA != MIN_WORD);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 *
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 * temp1 = GSM_MULT_R( *INVA, temp1 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 * *LARpp = GSM_ADD( temp1, temp1 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 * }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 #undef STEP
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 #define STEP( B_TIMES_TWO, MIC, INVA ) \
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 temp1 = GSM_ADD( *LARc++, MIC ) << 10; \
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 temp1 = GSM_SUB( temp1, B_TIMES_TWO ); \
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 temp1 = GSM_MULT_R( INVA, temp1 ); \
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 *LARpp++ = GSM_ADD( temp1, temp1 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 STEP( 0, -32, 13107 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 STEP( 0, -32, 13107 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 STEP( 4096, -16, 13107 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 STEP( -5120, -16, 13107 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 STEP( 188, -8, 19223 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 STEP( -3584, -8, 17476 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 STEP( -682, -4, 31454 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 STEP( -2288, -4, 29708 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 /* NOTE: the addition of *MIC is used to restore
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 * the sign of *LARc.
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 /* 4.2.9 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 /* Computation of the quantized reflection coefficients
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 /* 4.2.9.1 Interpolation of the LARpp[1..8] to get the LARp[1..8]
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 /*
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 * Within each frame of 160 analyzed speech samples the short term
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 * analysis and synthesis filters operate with four different sets of
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 * coefficients, derived from the previous set of decoded LARs(LARpp(j-1))
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 * and the actual set of decoded LARs (LARpp(j))
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 *
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 * (Initial value: LARpp(j-1)[1..8] = 0.)
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 static void Coefficients_0_12 (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 register word * LARpp_j_1,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 register word * LARpp_j,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 register word * LARp)
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 register int i;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 register longword ltmp;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 for (i = 1; i <= 8; i++, LARp++, LARpp_j_1++, LARpp_j++) {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 *LARp = GSM_ADD( SASR( *LARpp_j_1, 2 ), SASR( *LARpp_j, 2 ));
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 *LARp = GSM_ADD( *LARp, SASR( *LARpp_j_1, 1));
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 static void Coefficients_13_26 (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 register word * LARpp_j_1,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 register word * LARpp_j,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 register word * LARp)
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 register int i;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 register longword ltmp;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 for (i = 1; i <= 8; i++, LARpp_j_1++, LARpp_j++, LARp++) {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 *LARp = GSM_ADD( SASR( *LARpp_j_1, 1), SASR( *LARpp_j, 1 ));
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 static void Coefficients_27_39 (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 register word * LARpp_j_1,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 register word * LARpp_j,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 register word * LARp)
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 register int i;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 register longword ltmp;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 for (i = 1; i <= 8; i++, LARpp_j_1++, LARpp_j++, LARp++) {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 *LARp = GSM_ADD( SASR( *LARpp_j_1, 2 ), SASR( *LARpp_j, 2 ));
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 *LARp = GSM_ADD( *LARp, SASR( *LARpp_j, 1 ));
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 static void Coefficients_40_159 (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 register word * LARpp_j,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 register word * LARp)
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 register int i;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 for (i = 1; i <= 8; i++, LARp++, LARpp_j++)
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 *LARp = *LARpp_j;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 /* 4.2.9.2 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 static void LARp_to_rp (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 register word * LARp) /* [0..7] IN/OUT */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 /*
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 * The input of this procedure is the interpolated LARp[0..7] array.
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 * The reflection coefficients, rp[i], are used in the analysis
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 * filter and in the synthesis filter.
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 register int i;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 register word temp;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 register longword ltmp;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 for (i = 1; i <= 8; i++, LARp++) {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 /* temp = GSM_ABS( *LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 *
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 * if (temp < 11059) temp <<= 1;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 * else if (temp < 20070) temp += 11059;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 * else temp = GSM_ADD( temp >> 2, 26112 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 *
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 * *LARp = *LARp < 0 ? -temp : temp;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 if (*LARp < 0) {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 temp = *LARp == MIN_WORD ? MAX_WORD : -(*LARp);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 *LARp = - ((temp < 11059) ? temp << 1
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 : ((temp < 20070) ? temp + 11059
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 : GSM_ADD( temp >> 2, 26112 )));
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 } else {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 temp = *LARp;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 *LARp = (temp < 11059) ? temp << 1
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 : ((temp < 20070) ? temp + 11059
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 : GSM_ADD( temp >> 2, 26112 ));
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 /* 4.2.10 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 static void Short_term_analysis_filtering (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 struct gsmfr_0610_state * S,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 register word * rp, /* [0..7] IN */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 register int k_n, /* k_end - k_start */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 register word * s /* [0..n-1] IN/OUT */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 )
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 /*
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 * This procedure computes the short term residual signal d[..] to be fed
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 * to the RPE-LTP loop from the s[..] signal and from the local rp[..]
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 * array (quantized reflection coefficients). As the call of this
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 * procedure can be done in many ways (see the interpolation of the LAR
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 * coefficient), it is assumed that the computation begins with index
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 * k_start (for arrays d[..] and s[..]) and stops with index k_end
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 * (k_start and k_end are defined in 4.2.9.1). This procedure also
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 * needs to keep the array u[0..7] in memory for each call.
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 register word * u = S->u;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 register int i;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 register word di, zzz, ui, sav, rpi;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 register longword ltmp;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 for (; k_n--; s++) {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 di = sav = *s;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 for (i = 0; i < 8; i++) { /* YYY */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 ui = u[i];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 rpi = rp[i];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 u[i] = sav;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 zzz = GSM_MULT_R(rpi, di);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 sav = GSM_ADD( ui, zzz);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 zzz = GSM_MULT_R(rpi, ui);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 di = GSM_ADD( di, zzz );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 *s = di;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 static void Short_term_synthesis_filtering (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 struct gsmfr_0610_state * S,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 register word * rrp, /* [0..7] IN */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 register int k, /* k_end - k_start */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 register word * wt, /* [0..k-1] IN */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 register word * sr /* [0..k-1] OUT */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 )
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 register word * v = S->v;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 register int i;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 register word sri, tmp1, tmp2;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 register longword ltmp; /* for GSM_ADD & GSM_SUB */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 while (k--) {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 sri = *wt++;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 for (i = 8; i--;) {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 /* sri = GSM_SUB( sri, gsm_mult_r( rrp[i], v[i] ) );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 tmp1 = rrp[i];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 tmp2 = v[i];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 tmp2 = ( tmp1 == MIN_WORD && tmp2 == MIN_WORD
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 ? MAX_WORD
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 : 0x0FFFF & (( (longword)tmp1 * (longword)tmp2
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 + 16384) >> 15)) ;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 sri = GSM_SUB( sri, tmp2 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 /* v[i+1] = GSM_ADD( v[i], gsm_mult_r( rrp[i], sri ) );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 tmp1 = ( tmp1 == MIN_WORD && sri == MIN_WORD
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 ? MAX_WORD
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 : 0x0FFFF & (( (longword)tmp1 * (longword)sri
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 + 16384) >> 15)) ;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 v[i+1] = GSM_ADD( v[i], tmp1);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 *sr++ = v[0] = sri;
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 void Gsm_Short_Term_Analysis_Filter (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 struct gsmfr_0610_state * S,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 const word * LARc, /* coded log area ratio [0..7] IN */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 word * s /* signal [0..159] IN/OUT */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269 )
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 word * LARpp_j = S->LARpp[ S->j ];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 word * LARpp_j_1 = S->LARpp[ S->j ^= 1 ];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 word LARp[8];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 #undef FILTER
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 # define FILTER Short_term_analysis_filtering
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 Decoding_of_the_coded_Log_Area_Ratios( LARc, LARpp_j );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 Coefficients_0_12( LARpp_j_1, LARpp_j, LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 LARp_to_rp( LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 FILTER( S, LARp, 13, s);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 Coefficients_13_26( LARpp_j_1, LARpp_j, LARp);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 LARp_to_rp( LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 FILTER( S, LARp, 14, s + 13);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289 Coefficients_27_39( LARpp_j_1, LARpp_j, LARp);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 LARp_to_rp( LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 FILTER( S, LARp, 13, s + 27);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 Coefficients_40_159( LARpp_j, LARp);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 LARp_to_rp( LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 FILTER( S, LARp, 120, s + 40);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296 }
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 void Gsm_Short_Term_Synthesis_Filter (
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299 struct gsmfr_0610_state * S,
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
300
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
301 const word * LARcr, /* received log area ratios [0..7] IN */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
302 word * wt, /* received d [0..159] IN */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
303
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
304 word * s /* signal s [0..159] OUT */
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
305 )
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306 {
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307 word * LARpp_j = S->LARpp[ S->j ];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 word * LARpp_j_1 = S->LARpp[ S->j ^=1 ];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 word LARp[8];
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 #undef FILTER
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 # define FILTER Short_term_synthesis_filtering
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
314
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315 Decoding_of_the_coded_Log_Area_Ratios( LARcr, LARpp_j );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317 Coefficients_0_12( LARpp_j_1, LARpp_j, LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 LARp_to_rp( LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 FILTER( S, LARp, 13, wt, s );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 Coefficients_13_26( LARpp_j_1, LARpp_j, LARp);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 LARp_to_rp( LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 FILTER( S, LARp, 14, wt + 13, s + 13 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 Coefficients_27_39( LARpp_j_1, LARpp_j, LARp);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 LARp_to_rp( LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 FILTER( S, LARp, 13, wt + 27, s + 27 );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329 Coefficients_40_159( LARpp_j, LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330 LARp_to_rp( LARp );
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 FILTER(S, LARp, 120, wt + 40, s + 40);
d320a8fa3392 libgsmfr2: integrate short_term.c from libgsm
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332 }