FreeCalypso > hg > gsm-codec-lib

annotate dev/efr-bit-packing.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 9639a44ae2e7
children
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9639a44ae2e7 dev: efr-bit-packing helper program
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1 /*
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2 * We would like to generate our EFR RTP frame packing and unpacking code
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3 * using bitter and sweet utilities from libgsm, so we'll end up packing
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4 * and unpacking EFR just like good old FR. However, because of our
9639a44ae2e7 dev: efr-bit-packing helper program
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5 * slightly different approach, entering the spec file for bitter and sweet
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6 * manually would be tedious and error-prone, hence we are going to
9639a44ae2e7 dev: efr-bit-packing helper program
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7 * generate it with this program.
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8 */
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9
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12
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13 #define PRM_NO 57
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15 /* table from ETSI EFR code */
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16 static const unsigned bitno[PRM_NO] =
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17 {
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18 7, 8, 9, 8, 6, /* LSP VQ */
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19 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 5, /* first subframe */
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20 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 5, /* second subframe */
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21 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 5, /* third subframe */
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22 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 5 /* fourth subframe */
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23 };
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25 main(argc, argv)
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26 char **argv;
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27 {
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28 unsigned n;
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30 printf("EFR_MAGIC\t4\n");
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31 for (n = 0; n < PRM_NO; n++)
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32 printf("params[%u]\t%u\n", n, bitno[n]);
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33 exit(0);
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34 }