FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/g_adapt.c @ 542:f2d0f2f15d5f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
libgsmefr: add wrapper for TW-TS-001 RTP input
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 28 Sep 2024 06:38:08 +0000
parents 2a265be82195
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
365
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : g_adapt.c
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : gain adaptation for MR795 gain quantization
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 *
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 /*
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 * MODULE INCLUDE FILE AND VERSION ID
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 #include "namespace.h"
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 #include "g_adapt.h"
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 /*
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 * INCLUDE FILES
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 #include "typedef.h"
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 #include "basic_op.h"
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 #include "oper_32b.h"
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 #include "no_count.h"
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 #include "cnst.h"
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 #include "gmed_n.h"
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 /*
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 * LOCAL VARIABLES AND TABLES
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 #define LTP_GAIN_THR1 2721 /* 2721 Q13 = 0.3322 ~= 1.0 / (10*log10(2)) */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 #define LTP_GAIN_THR2 5443 /* 5443 Q13 = 0.6644 ~= 2.0 / (10*log10(2)) */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 /*
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 * PUBLIC PROGRAM CODE
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 ********************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 /*************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 *
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 * Function: gain_adapt_reset
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 * Purpose: Initializes state memory to zero
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 *
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 **************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 void gain_adapt_reset (GainAdaptState *st)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 Word16 i;
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 st->onset = 0;
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 st->prev_alpha = 0;
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 st->prev_gc = 0;
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 for (i = 0; i < LTPG_MEM_SIZE; i++)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 st->ltpg_mem[i] = 0;
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 /*************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 *
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 * Function: gain_adapt()
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 * Purpose: calculate pitch/codebook gain adaptation factor alpha
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 * (and update the adaptor state)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 *
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 **************************************************************************
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 void gain_adapt(
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 GainAdaptState *st, /* i : state struct */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 Word16 ltpg, /* i : ltp coding gain (log2()), Q13 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 Word16 gain_cod, /* i : code gain, Q1 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 Word16 *alpha /* o : gain adaptation factor, Q15 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 )
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 Word16 adapt; /* adaptdation status; 0, 1, or 2 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 Word16 result; /* alpha factor, Q13 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 Word16 filt; /* median-filtered LTP coding gain, Q13 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 Word16 tmp, i;
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 /* basic adaptation */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 test ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 if (sub (ltpg, LTP_GAIN_THR1) <= 0)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 adapt = 0; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 else
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 test ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 if (sub (ltpg, LTP_GAIN_THR2) <= 0)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 adapt = 1; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 else
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 adapt = 2; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 /*
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 * // onset indicator
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 * if ((cbGain > onFact * cbGainMem[0]) && (cbGain > 100.0))
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 * onset = 8;
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 * else
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 * if (onset)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 * onset--;
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 /* tmp = cbGain / onFact; onFact = 2.0; 200 Q1 = 100.0 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 tmp = shr_r (gain_cod, 1);
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 test (); test ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 if ((sub (tmp, st->prev_gc) > 0) && sub(gain_cod, 200) > 0)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 st->onset = 8; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 else
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 test ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 if (st->onset != 0)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 st->onset = sub (st->onset, 1); move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 /*
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 * // if onset, increase adaptor state
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 * if (onset && (gainAdapt < 2)) gainAdapt++;
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 test(); test ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 if ((st->onset != 0) && (sub (adapt, 2) < 0))
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 adapt = add (adapt, 1);
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 st->ltpg_mem[0] = ltpg; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 filt = gmed_n (st->ltpg_mem, 5); move16 (); /* function result */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 test ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 if (adapt == 0)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 test ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 if (sub (filt, 5443) > 0) /* 5443 Q13 = 0.66443... */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 result = 0; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 else
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 test ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 if (filt < 0)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 result = 16384; move16 (); /* 16384 Q15 = 0.5 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 else
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 { /* result = 0.5 - 0.75257499*filt */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 /* result (Q15) = 16384 - 24660 * (filt << 2) */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 filt = shl (filt, 2); /* Q15 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 result = sub (16384, mult (24660, filt));
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 else
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 result = 0; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 /*
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 * if (prevAlpha == 0.0) result = 0.5 * (result + prevAlpha);
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 test ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 if (st->prev_alpha == 0)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 result = shr (result, 1);
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 /* store the result */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 *alpha = result; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 /* update adapter state memory */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 st->prev_alpha = result; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 st->prev_gc = gain_cod; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 for (i = LTPG_MEM_SIZE-1; i > 0; i--)
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 {
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 st->ltpg_mem[i] = st->ltpg_mem[i-1]; move16 ();
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 }
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 /* mem[0] is just present for convenience in calling the gmed_n[5]
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 * function above. The memory depth is really LTPG_MEM_SIZE-1.
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 */
2a265be82195 libtwamr: integrate g_adapt.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 }