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comparison libgsmefr/sid_insert.c @ 37:b4db5366b595

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libgsmefr: implement SID code word insertion
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 24 Nov 2022 02:55:24 +0000
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36:b5726d659915 37:b4db5366b595
1 /*
2 * EFR_insert_sid_codeword() inserts the 95 bit wide SID codeword into
3 * an EFR frame in RTP encoding, normally as part of EFR_encode_frame()
4 * processing right after EFR_params2frame().
5 */
6
7 #include "gsm_efr.h"
8
9 void EFR_insert_sid_codeword(uint8_t *frame)
10 {
11 frame[6] |= 0x6F;
12 frame[7] = 0xFF;
13 frame[8] = 0xFF;
14 frame[9] |= 0x80;
15 frame[12] |= 0x3B;
16 frame[13] = 0xFF;
17 frame[14] = 0xFF;
18 frame[15] |= 0xE0;
19 frame[19] = 0xFF;
20 frame[20] = 0xFF;
21 frame[21] = 0xFF;
22 frame[25] = 0xFF;
23 frame[26] |= 0xFC;
24 frame[27] = 0xFF;
25 frame[28] |= 0xC0;
26 }