FreeCalypso > hg > gsm-codec-lib

annotate libgsmfr2/pack_frame2.c @ 430:edbbbf1c4ab1

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implement twamr-tseq-dec test program
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 07 May 2024 23:35:41 +0000
parents bebae251e5ee
children
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c344b4f35eb7 libgsmfr2: implement gsmfr_pack_frame()
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1 /*
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2 * This module holds our gsmfr_pack_from_array() function: a drop-in
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3 * replacement for gsm_implode() from classic libgsm.
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4 */
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5
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6 #include <stdint.h>
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7 #include "tw_gsmfr.h"
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9 #define GSM_FR_MAGIC 0xD
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10
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11 void gsmfr_pack_from_array(const int16_t *params, uint8_t *frame)
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12 {
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13 uint8_t *c = frame;
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14 unsigned sub;
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15
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16 *c++ = (GSM_FR_MAGIC << 4)
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17 | ((params[0] >> 2) & 0xF);
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18 *c++ = ((params[0] & 0x3) << 6)
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19 | (params[1] & 0x3F);
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20 *c++ = ((params[2] & 0x1F) << 3)
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21 | ((params[3] >> 2) & 0x7);
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22 *c++ = ((params[3] & 0x3) << 6)
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23 | ((params[4] & 0xF) << 2)
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24 | ((params[5] >> 2) & 0x3);
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25 *c++ = ((params[5] & 0x3) << 6)
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26 | ((params[6] & 0x7) << 3)
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27 | (params[7] & 0x7);
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28 params += 8;
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29 for (sub = 0; sub < 4; sub++) {
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30 *c++ = ((params[0] & 0x7F) << 1)
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31 | ((params[1] >> 1) & 0x1);
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32 *c++ = ((params[1] & 0x1) << 7)
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33 | ((params[2] & 0x3) << 5)
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34 | ((params[3] >> 1) & 0x1F);
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35 *c++ = ((params[3] & 0x1) << 7)
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36 | ((params[4] & 0x7) << 4)
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37 | ((params[5] & 0x7) << 1)
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38 | ((params[6] >> 2) & 0x1);
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39 *c++ = ((params[6] & 0x3) << 6)
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40 | ((params[7] & 0x7) << 3)
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41 | (params[8] & 0x7);
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42 *c++ = ((params[9] & 0x7) << 5)
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43 | ((params[10] & 0x7) << 2)
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44 | ((params[11] >> 1) & 0x3);
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45 *c++ = ((params[11] & 0x1) << 7)
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46 | ((params[12] & 0x7) << 4)
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47 | ((params[13] & 0x7) << 1)
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48 | ((params[14] >> 2) & 0x1);
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49 *c++ = ((params[14] & 0x3) << 6)
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50 | ((params[15] & 0x7) << 3)
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51 | (params[16] & 0x7);
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52 params += 17;
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53 }
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54 }