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
|
/****************************************************************************
* (c) Copyright Cisco 2000
* All Rights Reserved
*****************************************************************************/
/*****************************************************************************
**
** Description:
** Contains functions that perform SID code detection from a RTP frame of
** 264 bits
**
*****************************************************************************/
#include "gsmdata.h"
#include "bbdata.h"
#include "bbproto.h"
#include "codec.h"
#define GSM_FR_SID_LEN 95
/*
* GSM SID bit positions in 264-bits Traffic frame
*/
Uint16 const gsmFrSidBits [GSM_FR_SID_LEN] =
{
58-4, 59-4, 61-4, 62-4, 64-4, 65-4, 67-4, 68-4, 70-4, 71-4, 73-4, 74-4, 76-4, 77-4, 79-4, 80-4, 82-4, 83-4, 85-4, 86-4, 88-4, 89-4, 91-4, 92-4, 94-4, 95-4, 114-4,
115-4, 117-4, 118-4, 120-4, 121-4, 123-4, 124-4, 126-4, 127-4, 129-4, 130-4, 132-4, 133-4, 135-4, 136-4, 138-4, 139-4, 141-4, 142-4, 144-4, 145-4, 147-4,
148-4, 150-4, 151-4, 170-4, 171-4, 173-4, 174-4, 176-4, 177-4, 179-4, 180-4, 182-4, 183-4, 185-4, 186-4, 188-4, 189-4, 191-4, 192-4, 194-4, 195-4, 197-4,
198-4, 200-4, 201-4, 203-4, 204-4, 206-4, 207-4, 226-4, 227-4, 229-4, 230-4, 232-4, 233-4, 235-4, 236-4, 238-4, 241-4, 244-4, 247-4, 250-4, 253-4, 256-4, 259-4,
262-4
};
#define GSM_EFR_SID_LEN 95
static const Uint8 gsmEfrSidBits[GSM_EFR_SID_LEN] =
{
45, 46, 48, 49, 50, 51, 52, 53, 54, 55,
56, 57, 58, 59, 60, 61, 62, 63, 64, 65,
66, 67, 68, 94, 95, 96, 98, 99, 100, 101,
102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
112, 113, 114, 115, 116, 117, 118, 148, 149, 150,
151, 152, 153, 154, 155, 156, 157, 158, 159, 160,
161, 162, 163, 164, 165, 166, 167, 168, 169, 170,
171, 196, 197, 198, 199, 200, 201, 202, 203, 204,
205, 206, 207, 208, 209, 212, 213, 214, 215, 216,
217, 218, 219, 220, 221
};
Uint8 sidDetection(Uint8 *speechBits, t_vocAlgo vocoAlgo)
{
Uint8 i;
Uint8 sidCode = 0;
Uint8 sidFlag;
switch( vocoAlgo )
{
case VOC_GSMF:
for(i=0; i<GSM_FR_SID_LEN; i++)
{
sidCode += speechBits[gsmFrSidBits[i]];
}
if(sidCode < 2)
{
sidFlag = 2;
}
else if(sidCode < 16)
{
sidFlag = 1;
}
else
sidFlag = 0;
break;
case VOC_EFR:
for(i=0; i<GSM_FR_SID_LEN; i++)
{
sidCode += speechBits[gsmEfrSidBits[i]];
}
if(sidCode > 93)
{
sidFlag = 2;
}
else if(sidCode > 79)
{
sidFlag = 1;
}
else
sidFlag = 0;
break;
default:
sidFlag = 0;
break;
}
return(sidFlag);
}
|
