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annotate libgsmefr/sid_insert.c @ 282:9ee8ad3d4d30

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frtest: rm gsmfr-hand-test and gsmfr-max-out utils These hack programs were never properly documented and were written only as part of a debug chase, in pursuit of a bug that ultimately turned out to be in our then-hacky patch to osmo-bts-sysmo, before beginning of proper patches in Osmocom. These hack programs need to be dropped from the present sw package because they depend on old libgsm, and we are eliminating that dependency.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 14 Apr 2024 05:44:47 +0000
parents b4db5366b595
children
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37
b4db5366b595 libgsmefr: implement SID code word insertion
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
b4db5366b595 libgsmefr: implement SID code word insertion
Mychaela Falconia <falcon@freecalypso.org>
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2 * EFR_insert_sid_codeword() inserts the 95 bit wide SID codeword into
b4db5366b595 libgsmefr: implement SID code word insertion
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3 * an EFR frame in RTP encoding, normally as part of EFR_encode_frame()
b4db5366b595 libgsmefr: implement SID code word insertion
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4 * processing right after EFR_params2frame().
b4db5366b595 libgsmefr: implement SID code word insertion
Mychaela Falconia <falcon@freecalypso.org>
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5 */
b4db5366b595 libgsmefr: implement SID code word insertion
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6
b4db5366b595 libgsmefr: implement SID code word insertion
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7 #include "gsm_efr.h"
b4db5366b595 libgsmefr: implement SID code word insertion
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8
b4db5366b595 libgsmefr: implement SID code word insertion
Mychaela Falconia <falcon@freecalypso.org>
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9 void EFR_insert_sid_codeword(uint8_t *frame)
b4db5366b595 libgsmefr: implement SID code word insertion
Mychaela Falconia <falcon@freecalypso.org>
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10 {
b4db5366b595 libgsmefr: implement SID code word insertion
Mychaela Falconia <falcon@freecalypso.org>
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11 frame[6] |= 0x6F;
b4db5366b595 libgsmefr: implement SID code word insertion
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12 frame[7] = 0xFF;
b4db5366b595 libgsmefr: implement SID code word insertion
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13 frame[8] = 0xFF;
b4db5366b595 libgsmefr: implement SID code word insertion
Mychaela Falconia <falcon@freecalypso.org>
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14 frame[9] |= 0x80;
b4db5366b595 libgsmefr: implement SID code word insertion
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15 frame[12] |= 0x3B;
b4db5366b595 libgsmefr: implement SID code word insertion
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16 frame[13] = 0xFF;
b4db5366b595 libgsmefr: implement SID code word insertion
Mychaela Falconia <falcon@freecalypso.org>
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17 frame[14] = 0xFF;
b4db5366b595 libgsmefr: implement SID code word insertion
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18 frame[15] |= 0xE0;
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Mychaela Falconia <falcon@freecalypso.org>
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19 frame[19] = 0xFF;
b4db5366b595 libgsmefr: implement SID code word insertion
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20 frame[20] = 0xFF;
b4db5366b595 libgsmefr: implement SID code word insertion
Mychaela Falconia <falcon@freecalypso.org>
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21 frame[21] = 0xFF;
b4db5366b595 libgsmefr: implement SID code word insertion
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22 frame[25] = 0xFF;
b4db5366b595 libgsmefr: implement SID code word insertion
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23 frame[26] |= 0xFC;
b4db5366b595 libgsmefr: implement SID code word insertion
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24 frame[27] = 0xFF;
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25 frame[28] |= 0xC0;
b4db5366b595 libgsmefr: implement SID code word insertion
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26 }