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comparison libgsmhr1/pack_frame.c @ 490:4d80730683d4

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libgsmhr1: implement TS 101 318 packing and unpacking
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 15 Jun 2024 05:33:35 +0000
parents
children c275e57132f8
comparison
equal deleted inserted replaced
489:f036e1de5b05 490:4d80730683d4
1 /*
2 * This module holds our gsmhr_pack_ts101318() function: packing a single
3 * GSM-HR codec frame from an array of broken-down parameters into TS 101 318
4 * format.
5 */
6
7 #include <stdint.h>
8 #include "tw_gsmhr.h"
9
10 void gsmhr_pack_ts101318(const int16_t *params, uint8_t *payload)
11 {
12 uint8_t *c = payload;
13
14 if (params[5]) {
15 /* voiced modes */
16 *c++ = ((params[0] & 0x1F) << 3)
17 | ((params[1] >> 8) & 0x7);
18 *c++ = params[1] & 0xFF;
19 *c++ = ((params[2] >> 1) & 0xFF);
20 *c++ = ((params[2] & 0x1) << 7)
21 | ((params[3] >> 1) & 0x7F);
22 *c++ = ((params[3] & 0x1) << 7)
23 | ((params[4] & 0x1) << 6)
24 | ((params[5] & 0x3) << 4)
25 | ((params[6] >> 4) & 0xF);
26 *c++ = ((params[6] & 0xF) << 4)
27 | ((params[7] >> 5) & 0xF);
28 *c++ = ((params[7] & 0x1F) << 3)
29 | ((params[8] >> 2) & 0x7);
30 *c++ = ((params[8] & 0x3) << 6)
31 | ((params[9] & 0xF) << 2)
32 | ((params[10] >> 7) & 0x3);
33 *c++ = ((params[10] & 0x7F) << 1)
34 | ((params[11] >> 4) & 0x1);
35 *c++ = ((params[11] & 0xF) << 4)
36 | (params[12] & 0xF);
37 *c++ = ((params[13] >> 1) & 0xFF);
38 *c++ = ((params[13] & 0x1) << 7)
39 | ((params[14] & 0x1F) << 2)
40 | ((params[15] >> 2) & 0x3);
41 *c++ = ((params[15] & 0x3) << 6)
42 | ((params[16] >> 3) & 0x3F);
43 *c++ = ((params[16] & 0x7) << 5)
44 | (params[17] & 0x1F);
45 } else {
46 /* unvoiced modes */
47 *c++ = ((params[0] & 0x1F) << 3)
48 | ((params[1] >> 8) & 0x7);
49 *c++ = params[1] & 0xFF;
50 *c++ = ((params[2] >> 1) & 0xFF);
51 *c++ = ((params[2] & 0x1) << 7)
52 | ((params[3] >> 1) & 0x7F);
53 *c++ = ((params[3] & 0x1) << 7)
54 | ((params[4] & 0x1) << 6)
55 | ((params[5] & 0x3) << 4)
56 | ((params[6] >> 3) & 0xF);
57 *c++ = ((params[6] & 0x7) << 5)
58 | ((params[7] >> 2) & 0x1F);
59 *c++ = ((params[7] & 0x3) << 6)
60 | ((params[8] & 0x1F) << 1)
61 | ((params[9] >> 6) & 0x1);
62 *c++ = ((params[9] & 0x3F) << 2)
63 | ((params[10] >> 5) & 0x3);
64 *c++ = ((params[10] & 0x1F) << 3)
65 | ((params[11] >> 2) & 0x7);
66 *c++ = ((params[11] & 0x3) << 6)
67 | ((params[12] >> 1) & 0x3F);
68 *c++ = ((params[12] & 0x1) << 7)
69 | (params[13] & 0x7F);
70 *c++ = ((params[14] & 0x1F) << 3)
71 | ((params[15] >> 4) & 0x7);
72 *c++ = ((params[15] & 0xF) << 4)
73 | ((params[16] >> 3) & 0xF);
74 *c++ = ((params[16] & 0x7) << 5)
75 | (params[17] & 0x1F);
76 }
77 }