1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/*
** Copyright 2003-2010, VisualOn, Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
/*--------------------------------------------------------------------------*
* DTX.H *
*--------------------------------------------------------------------------*
* Static memory, constants and frametypes for the DTX *
*--------------------------------------------------------------------------*/
#ifndef __DTX_H__
#define __DTX_H__
#define DTX_MAX_EMPTY_THRESH 50
#define DTX_HIST_SIZE 8
#define DTX_HIST_SIZE_MIN_ONE 7
#define DTX_ELAPSED_FRAMES_THRESH (24 + 7 -1)
#define DTX_HANG_CONST 7 /* yields eight frames of SP HANGOVER */
#define INV_MED_THRESH 14564
#define ISF_GAP 128 /* 50 */
#define ONE_MINUS_ISF_GAP 16384 - ISF_GAP
#define ISF_GAP 128
#define ISF_DITH_GAP 448
#define ISF_FACTOR_LOW 256
#define ISF_FACTOR_STEP 2
#define GAIN_THR 180
#define GAIN_FACTOR 75
typedef struct
{
Word16 isf_hist[M * DTX_HIST_SIZE];
Word16 log_en_hist[DTX_HIST_SIZE];
Word16 hist_ptr;
Word16 log_en_index;
Word16 cng_seed;
/* DTX handler stuff */
Word16 dtxHangoverCount;
Word16 decAnaElapsedCount;
Word32 D[28];
Word32 sumD[DTX_HIST_SIZE];
} dtx_encState;
#define SPEECH 0
#define DTX 1
#define DTX_MUTE 2
#define TX_SPEECH 0
#define TX_SID_FIRST 1
#define TX_SID_UPDATE 2
#define TX_NO_DATA 3
#define RX_SPEECH_GOOD 0
#define RX_SPEECH_PROBABLY_DEGRADED 1
#define RX_SPEECH_LOST 2
#define RX_SPEECH_BAD 3
#define RX_SID_FIRST 4
#define RX_SID_UPDATE 5
#define RX_SID_BAD 6
#define RX_NO_DATA 7
/*****************************************************************************
*
* DEFINITION OF DATA TYPES
*****************************************************************************/
Word16 dtx_enc_init(dtx_encState ** st, Word16 isf_init[], VO_MEM_OPERATOR *pMemOP);
Word16 dtx_enc_reset(dtx_encState * st, Word16 isf_init[]);
void dtx_enc_exit(dtx_encState ** st, VO_MEM_OPERATOR *pMemOP);
Word16 dtx_enc(
dtx_encState * st, /* i/o : State struct */
Word16 isf[M], /* o : CN ISF vector */
Word16 * exc2, /* o : CN excitation */
Word16 ** prms
);
Word16 dtx_buffer(
dtx_encState * st, /* i/o : State struct */
Word16 isf_new[], /* i : isf vector */
Word32 enr, /* i : residual energy (in L_FRAME) */
Word16 codec_mode
);
void tx_dtx_handler(dtx_encState * st, /* i/o : State struct */
Word16 vad_flag, /* i : vad decision */
Word16 * usedMode /* i/o : mode changed or not */
);
void Qisf_ns(
Word16 * isf1, /* input : ISF in the frequency domain (0..0.5) */
Word16 * isf_q, /* output: quantized ISF */
Word16 * indice /* output: quantization indices */
);
void Disf_ns(
Word16 * indice, /* input: quantization indices */
Word16 * isf_q /* input : ISF in the frequency domain (0..0.5) */
);
#endif //__DTX_H__
|
