FreeCalypso > hg > gsm-codec-lib

annotate libgsmefr/dtx_enc.c @ 153:14b627682458

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
gsmfr-decode-r utility put together
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 14 Dec 2022 23:11:20 +0000
parents c1d53064b410
children cf39a90f5196
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
119
c1d53064b410 libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 67
diff changeset
1 /*
c1d53064b410 libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 67
diff changeset
2 * This file is a product of splitting ETSI EFR dtx.c into parts;
c1d53064b410 libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 67
diff changeset
3 * the present module is the encoder-specific part.
c1d53064b410 libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 67
diff changeset
4 */
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
6 #include "gsm_efr.h"
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include "typedef.h"
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
8 #include "namespace.h"
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include "basic_op.h"
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include "cnst.h"
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include "sig_proc.h"
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
12 #include "memops.h"
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
13 #include "no_count.h"
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 #include "dtx.h"
119
c1d53064b410 libgsmefr: split dtx.c into dtx_{common,dec,enc}.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 67
diff changeset
15 #include "dtx_defs.h"
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
16 #include "enc_state.h"
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 /*************************************************************************
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 * FUNCTION NAME: reset_tx_dtx
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 * PURPOSE: Resets the static variables of the TX DTX handler to their
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 * initial values
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 *************************************************************************/
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
27 void reset_tx_dtx (struct EFR_encoder_state *st)
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 Word16 i;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 /* suppose infinitely long speech period before start */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
33 st->txdtx_hangover = DTX_HANGOVER;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
34 st->txdtx_N_elapsed = 0x7fff;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
35 st->txdtx_ctrl = TX_SP_FLAG | TX_VAD_FLAG;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 for (i = 0; i < 6; i++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
39 st->old_CN_mem_tx[i] = 0;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 for (i = 0; i < DTX_HANGOVER; i++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
44 st->lsf_old_tx[i][0] = 1384;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
45 st->lsf_old_tx[i][1] = 2077;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
46 st->lsf_old_tx[i][2] = 3420;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
47 st->lsf_old_tx[i][3] = 5108;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
48 st->lsf_old_tx[i][4] = 6742;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
49 st->lsf_old_tx[i][5] = 8122;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
50 st->lsf_old_tx[i][6] = 9863;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
51 st->lsf_old_tx[i][7] = 11092;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
52 st->lsf_old_tx[i][8] = 12714;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
53 st->lsf_old_tx[i][9] = 13701;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 for (i = 0; i < 4 * DTX_HANGOVER; i++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
58 st->gain_code_old_tx[i] = 0;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
61 st->L_pn_seed_tx = PN_INITIAL_SEED;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
63 st->buf_p_tx = 0;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 return;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 /*************************************************************************
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 * FUNCTION NAME: tx_dtx
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 * PURPOSE: DTX handler of the speech encoder. Determines when to add
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 * the hangover period to the end of the speech burst, and
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 * also determines when to use old SID parameters, and when
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 * to update the SID parameters. This function also initializes
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 * the pseudo noise generator shift register.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 * Operation of the TX DTX handler is based on the VAD flag
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 * given as input from the speech encoder.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 * INPUTS: VAD_flag Voice activity decision
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 * *txdtx_ctrl Old encoder DTX control word
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 * OUTPUTS: *txdtx_ctrl Updated encoder DTX control word
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 * L_pn_seed_tx Initialized pseudo noise generator shift
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 * register (global variable)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 * RETURN VALUE: none
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 *************************************************************************/
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 void tx_dtx (
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
92 struct EFR_encoder_state *st,
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
93 Word16 VAD_flag
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 )
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 /* N_elapsed (frames since last SID update) is incremented. If SID
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 is updated N_elapsed is cleared later in this function */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
99 st->txdtx_N_elapsed = add (st->txdtx_N_elapsed, 1);
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 /* If voice activity was detected, reset hangover counter */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 if (sub (VAD_flag, 1) == 0)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
105 st->txdtx_hangover = DTX_HANGOVER;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
106 st->txdtx_ctrl = TX_SP_FLAG | TX_VAD_FLAG;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 else
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
110 if (st->txdtx_hangover == 0)
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 /* Hangover period is over, SID should be updated */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
114 st->txdtx_N_elapsed = 0;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 /* Check if this is the first frame after hangover period */
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
117 if ((st->txdtx_ctrl & TX_HANGOVER_ACTIVE) != 0)
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
119 st->txdtx_ctrl = TX_PREV_HANGOVER_ACTIVE
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
120 | TX_SID_UPDATE;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
121 st->L_pn_seed_tx = PN_INITIAL_SEED;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 else
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
125 st->txdtx_ctrl = TX_SID_UPDATE;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 else
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 /* Hangover period is not over, update hangover counter */
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
131 st->txdtx_hangover = sub (st->txdtx_hangover, 1);
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 /* Check if elapsed time from last SID update is greater than
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 threshold. If not, set SP=0 (although hangover period is not
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 over) and use old SID parameters for new SID frame.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 N_elapsed counter must be summed with hangover counter in order
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 to avoid erroneus SP=1 decision in case when N_elapsed is grown
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 bigger than threshold and hangover period is still active */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
140 if (sub (add (st->txdtx_N_elapsed, st->txdtx_hangover),
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 DTX_ELAPSED_THRESHOLD) < 0)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 /* old SID frame should be used */
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
144 st->txdtx_ctrl = TX_USE_OLD_SID;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 else
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
148 if ((st->txdtx_ctrl & TX_HANGOVER_ACTIVE) != 0)
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
150 st->txdtx_ctrl = TX_PREV_HANGOVER_ACTIVE
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 | TX_HANGOVER_ACTIVE
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
152 | TX_SP_FLAG;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 else
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
156 st->txdtx_ctrl = TX_HANGOVER_ACTIVE
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
157 | TX_SP_FLAG;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 return;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 /*************************************************************************
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 * FUNCTION NAME: CN_encoding
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 * PURPOSE: Encoding of the comfort noise parameters into a SID frame.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 * Use old SID parameters if necessary. Set the parameter
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 * indices not used by comfort noise parameters to zero.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 * INPUTS: params[0..56] Comfort noise parameter frame from the
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 * speech encoder
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 * txdtx_ctrl TX DTX handler control word
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 * OUTPUTS: params[0..56] Comfort noise encoded parameter frame
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 * RETURN VALUE: none
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 *************************************************************************/
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 void CN_encoding (
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
185 struct EFR_encoder_state *st,
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 Word16 params[],
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 Word16 txdtx_ctrl
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 )
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 Word16 i;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 if ((txdtx_ctrl & TX_SID_UPDATE) != 0)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 /* Store new CN parameters in memory to be used later as old
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 CN parameters */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 /* LPC parameter indices */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 for (i = 0; i < 5; i++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
200 st->old_CN_mem_tx[i] = params[i];
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 /* Codebook index computed in last subframe */
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
203 st->old_CN_mem_tx[5] = params[56];
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 if ((txdtx_ctrl & TX_USE_OLD_SID) != 0)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 /* Use old CN parameters previously stored in memory */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 for (i = 0; i < 5; i++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
210 params[i] = st->old_CN_mem_tx[i];
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 }
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
212 params[17] = st->old_CN_mem_tx[5];
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
213 params[30] = st->old_CN_mem_tx[5];
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
214 params[43] = st->old_CN_mem_tx[5];
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
215 params[56] = st->old_CN_mem_tx[5];
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 /* Set all the rest of the parameters to zero (SID codeword will
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 be written later) */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 for (i = 0; i < 12; i++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
221 params[i + 5] = 0;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
222 params[i + 18] = 0;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
223 params[i + 31] = 0;
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
224 params[i + 44] = 0;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 return;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 /*************************************************************************
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 * FUNCTION NAME: aver_lsf_history
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 * PURPOSE: Compute the averaged LSF parameter vector. Computation is
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 * performed by averaging the LSF parameter vectors which exist
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 * in the LSF parameter history, together with the LSF
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 * parameter vectors of the current frame.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 * INPUTS: lsf_old[0..DTX_HANGOVER-1][0..M-1]
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 * LSF parameter history
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 * lsf1[0..M-1] LSF vector of the 1st half of the frame
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 * lsf2[0..M-1] LSF vector of the 2nd half of the frame
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 * OUTPUTS: lsf_aver[0..M-1] Averaged LSF parameter vector
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 * RETURN VALUE: none
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 *************************************************************************/
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 void aver_lsf_history (
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 Word16 lsf_old[DTX_HANGOVER][M],
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 Word16 lsf1[M],
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 Word16 lsf2[M],
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 Word16 lsf_aver[M]
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 )
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 Word16 i, j;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 Word32 L_temp;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 for (j = 0; j < M; j++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 L_temp = L_mult (0x3fff, lsf1[j]);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 L_temp = L_mac (L_temp, 0x3fff, lsf2[j]);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 L_temp = L_mult (INV_DTX_HANGOVER_P1, extract_h (L_temp));
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 for (i = 0; i < DTX_HANGOVER; i++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 L_temp = L_mac (L_temp, INV_DTX_HANGOVER_P1, lsf_old[i][j]);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 lsf_aver[j] = extract_h (L_temp); move16 ();
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 return;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 /*************************************************************************
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 * FUNCTION NAME: update_gain_code_history_tx
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 * PURPOSE: Update the fixed codebook gain parameter history of the
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 * encoder. The fixed codebook gain parameters kept in the buffer
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 * are used later for computing the reference fixed codebook
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284 * gain parameter value and the averaged fixed codebook gain
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 * parameter value.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 * INPUTS: new_gain_code New fixed codebook gain value
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289 * gain_code_old_tx[0..4*DTX_HANGOVER-1]
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 * Old fixed codebook gain history of encoder
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 * OUTPUTS: gain_code_old_tx[0..4*DTX_HANGOVER-1]
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 * Updated fixed codebook gain history of encoder
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 * RETURN VALUE: none
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297 *************************************************************************/
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299 void update_gain_code_history_tx (
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
300 struct EFR_encoder_state *st,
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
301 Word16 new_gain_code
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
302 )
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
303 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
304 /* Circular buffer */
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
305 st->gain_code_old_tx[st->buf_p_tx] = new_gain_code;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
307 if (sub (st->buf_p_tx, (4 * DTX_HANGOVER - 1)) == 0)
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
309 st->buf_p_tx = 0;
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311 else
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 {
67
58b64224d4ac libgsmefr: dtx.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 66
diff changeset
313 st->buf_p_tx = add (st->buf_p_tx, 1);
66
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
314 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 return;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 /*************************************************************************
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 * FUNCTION NAME: compute_CN_excitation_gain
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 * PURPOSE: Compute the unquantized fixed codebook gain. Computation is
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 * based on the energy of the Linear Prediction residual signal.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 * INPUTS: res2[0..39] Linear Prediction residual signal
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 * OUTPUTS: none
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330 * RETURN VALUE: Unquantized fixed codebook gain
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332 *************************************************************************/
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 Word16 compute_CN_excitation_gain (
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 Word16 res2[L_SUBFR]
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336 )
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338 Word16 i, norm, norm1, temp, overfl;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
339 Word32 L_temp;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
340
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
341 /* Compute the energy of the LP residual signal */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
342
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
343 norm = 0; move16 ();
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
344 do
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
345 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
346 overfl = 0; move16 ();
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
348 L_temp = 0L; move32 ();
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
349 for (i = 0; i < L_SUBFR; i++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
350 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351 temp = shr (res2[i], norm);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
352 L_temp = L_mac (L_temp, temp, temp);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
353 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 test ();
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356 if (L_sub (L_temp, MAX_32) == 0)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
357 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
358 norm = add (norm, 1);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
359 overfl = 1; move16 (); /* Set the overflow flag */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
360 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
361 test ();
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
362 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 while (overfl != 0);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
364
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
365 L_temp = L_add (L_temp, 1L); /* Avoid the case of all zeros */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
366
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
367 /* Take the square root of the obtained energy value (sqroot is a 2nd
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
368 order Taylor series approximation) */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
369
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
370 norm1 = norm_l (L_temp);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
371 temp = extract_h (L_shl (L_temp, norm1));
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
372 L_temp = L_mult (temp, temp);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
373 L_temp = L_sub (805306368L, L_shr (L_temp, 3));
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
374 L_temp = L_add (L_temp, L_mult (24576, temp));
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
375
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
376 temp = extract_h (L_temp);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
377 test (); logic16 ();
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
378 if ((norm1 & 0x0001) != 0)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
379 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
380 temp = mult_r (temp, 23170);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
381 norm1 = sub (norm1, 1);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
382 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
383 /* Divide the result of sqroot operation by sqroot(10) */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
384
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
385 temp = mult_r (temp, 10362);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
386
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
387 /* Re-scale to get the final value */
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
388
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
389 norm1 = shr (norm1, 1);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
390 norm1 = sub (norm1, norm);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
391
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
392 test ();
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
393 if (norm1 >= 0)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
394 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
395 temp = shr (temp, norm1);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
396 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
397 else
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
398 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
399 temp = shl (temp, abs_s (norm1));
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
400 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
401
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
402 return temp;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
403 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
404
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
405 /*************************************************************************
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
406 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
407 * FUNCTION NAME: aver_gain_code_history
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
408 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
409 * PURPOSE: Compute the averaged fixed codebook gain parameter value.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
410 * Computation is performed by averaging the fixed codebook
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
411 * gain parameter values which exist in the fixed codebook
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
412 * gain parameter history, together with the fixed codebook
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
413 * gain parameter value of the current subframe.
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
414 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
415 * INPUTS: CN_excitation_gain
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
416 * Unquantized fixed codebook gain value
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
417 * of the current subframe
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
418 * gain_code_old[0..4*DTX_HANGOVER-1]
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
419 * fixed codebook gain parameter history
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
420 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
421 * OUTPUTS: none
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
422 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
423 * RETURN VALUE: Averaged fixed codebook gain value
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
424 *
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
425 *************************************************************************/
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
426
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
427 Word16 aver_gain_code_history (
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
428 Word16 CN_excitation_gain,
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
429 Word16 gain_code_old[4 * DTX_HANGOVER]
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
430 )
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
431 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
432 Word16 i;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
433 Word32 L_ret;
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
434
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
435 L_ret = L_mult (0x470, CN_excitation_gain);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
436
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
437 for (i = 0; i < (4 * DTX_HANGOVER); i++)
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
438 {
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
439 L_ret = L_mac (L_ret, 0x470, gain_code_old[i]);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
440 }
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
441 return extract_h (L_ret);
824ff833bda9 libgsmefr/dtx.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
442 }