FreeCalypso > hg > freecalypso-tools

annotate tchtools/efr2dsp.c @ 914:bf302e52c8ea

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Source-dirs: add tchtools
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 29 Dec 2022 22:21:04 +0000
parents 94890123a74f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
906
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * The utility function implemented in this module constructs a 33-byte
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * frame for loading into Calypso DSP TCH UL buffer from a standard
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * 244-bit EFR codec frame in the RTP encoding format of ETSI TS 101 318.
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 */
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include <sys/types.h>
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include <string.h>
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include <strings.h>
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 static const u_short efr_to_tidsp_table[244] = {
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 50, 24, 25, 37, 38, 43, 44, 26, 42, 27, 39, 40,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 45, 51, 52, 41, 46, 28, 29, 47, 53, 77, 78, 30,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 54, 55, 79, 56, 80, 109, 110, 111, 112, 113, 114, 115,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 180, 181, 0, 1, 2, 3, 4, 5, 20, 31, 32, 16,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 73, 105, 157, 81, 118, 138, 165, 82, 119, 139, 166, 83,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 120, 140, 167, 84, 121, 141, 168, 85, 122, 186, 200, 204,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 224, 244, 205, 225, 245, 206, 226, 246, 207, 227, 247, 208,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 228, 248, 17, 61, 101, 153, 161, 12, 13, 22, 35, 48,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 116, 18, 74, 106, 158, 86, 123, 142, 169, 87, 124, 143,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 170, 88, 125, 144, 171, 89, 126, 145, 172, 90, 127, 189,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 201, 209, 229, 249, 210, 230, 250, 211, 231, 251, 212, 232,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 252, 213, 233, 253, 19, 62, 102, 154, 162, 6, 7, 8,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 9, 10, 11, 21, 33, 34, 57, 75, 107, 159, 91, 128,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 146, 173, 92, 129, 147, 174, 93, 130, 148, 175, 94, 131,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 149, 176, 95, 132, 192, 202, 214, 234, 254, 215, 235, 255,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 216, 236, 256, 217, 237, 257, 218, 238, 258, 59, 63, 103,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 155, 163, 14, 15, 23, 36, 49, 117, 58, 76, 108, 160,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 96, 133, 150, 177, 97, 134, 198, 199, 98, 135, 151, 178,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 99, 136, 152, 179, 100, 137, 195, 203, 219, 239, 259, 220,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 240, 260, 221, 241, 261, 222, 242, 262, 223, 243, 263, 60,
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 64, 104, 156, 164
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 };
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 static int
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 msb_get_bit(buf, bn)
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 u_char *buf;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 {
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 int pos_byte = bn >> 3;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 int pos_bit = 7 - (bn & 7);
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 return (buf[pos_byte] >> pos_bit) & 1;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 }
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 static void
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 msb_set_bit(buf, bn)
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 u_char *buf;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 {
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 int pos_byte = bn >> 3;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 int pos_bit = 7 - (bn & 7);
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 buf[pos_byte] |= (1 << pos_bit);
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 }
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 void
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 efr_std_to_tidsp(inbytes, outbytes)
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 u_char *inbytes, *outbytes;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 {
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 int i;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 bzero(outbytes, 33);
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 for (i = 0; i < 244; i++) {
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 if (msb_get_bit(inbytes, i + 4))
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 msb_set_bit(outbytes, efr_to_tidsp_table[i]);
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 }
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 /* set repetition bits */
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 if (outbytes[23] & 0x20)
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 outbytes[23] |= 0x18;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 if (outbytes[23] & 0x04)
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 outbytes[23] |= 0x03;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 if (outbytes[24] & 0x80)
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 outbytes[24] |= 0x60;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 if (outbytes[24] & 0x10)
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 outbytes[24] |= 0x0C;
94890123a74f tchtools: new program fc-efr2tch
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 }