FreeCalypso > hg > ice1-trau-tester

annotate abis/dl_frames.c @ 31:cd7448724d74

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top Makefile: add abis program subdir
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 13 Aug 2024 21:44:30 +0000
parents 5dd30224b70a
children f0b026615f3b
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1 /*
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2 * In this module we generate canned TRAU-DL frames for FR and EFR,
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3 * which will later be transmitted on Abis when individual subslots
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4 * come alive.
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5 */
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6
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7 #include <stdint.h>
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8 #include <stdbool.h>
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11 #include <string.h>
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12
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13 #include <osmocom/core/bits.h>
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14 #include <osmocom/core/utils.h>
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15 #include <osmocom/trau/trau_frame.h>
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16 #include <osmocom/trau/trau_rtp.h>
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17
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18 #include "dl_frames.h"
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19
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20 ubit_t dl_frame_fr[DL_OUTPUT_BUFLEN];
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21 ubit_t dl_frame_efr[DL_OUTPUT_BUFLEN];
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22
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23 static const uint8_t gsmfr_silence_frame[33] = {
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24 0xDA, 0xA7, 0xAA, 0xA5, 0x1A,
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25 0x50, 0x20, 0x38, 0xE4, 0x6D, 0xB9, 0x1B,
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26 0x50, 0x20, 0x38, 0xE4, 0x6D, 0xB9, 0x1B,
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27 0x50, 0x20, 0x38, 0xE4, 0x6D, 0xB9, 0x1B,
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28 0x50, 0x20, 0x38, 0xE4, 0x6D, 0xB9, 0x1B,
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29 };
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30
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31 static const uint8_t efr_dhf_rtp[31] = {
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32 0xC0, 0x85, 0xEB, 0x49, 0x0F, 0xAA, 0xD6, 0x03,
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33 0xE3, 0xA1, 0x86, 0x07, 0xB0, 0xC4, 0x2C, 0x08,
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34 0x04, 0x80, 0x55, 0x80, 0x00, 0x00, 0x00, 0x00,
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35 0x03, 0x6B, 0x00, 0x00, 0x00, 0x00, 0x00
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36 };
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37
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38 static void gen_dl_fr(void)
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39 {
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40 struct osmo_trau_frame tf;
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41 struct osmo_trau2rtp_state st;
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42 int rc;
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43
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44 tf.dir = OSMO_TRAU_DIR_DL;
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45 st.type = OSMO_TRAU16_FT_FR;
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46 rc = osmo_rtp2trau(&tf, gsmfr_silence_frame, 33, &st);
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47 OSMO_ASSERT(rc == 0);
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48 rc = osmo_trau_frame_encode(dl_frame_fr, DL_OUTPUT_BUFLEN, &tf);
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49 OSMO_ASSERT(rc == DL_OUTPUT_LEN);
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50 }
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51
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52 static void gen_dl_efr(void)
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53 {
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54 struct osmo_trau_frame tf;
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55 struct osmo_trau2rtp_state st;
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56 int rc;
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57
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58 tf.dir = OSMO_TRAU_DIR_DL;
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59 st.type = OSMO_TRAU16_FT_EFR;
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60 rc = osmo_rtp2trau(&tf, efr_dhf_rtp, 31, &st);
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61 OSMO_ASSERT(rc == 0);
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62 rc = osmo_trau_frame_encode(dl_frame_efr, DL_OUTPUT_BUFLEN, &tf);
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63 OSMO_ASSERT(rc == DL_OUTPUT_LEN);
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64 }
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65
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66 void init_canned_dl_frames(void)
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67 {
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68 gen_dl_fr();
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69 gen_dl_efr();
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70 }