osmocom
/
libosmocore
mirror of https://gerrit.osmocom.org/libosmocore
10
0
Fork 0
Code Issues Releases Wiki Activity

gsm: TS 44.021 modified V.110 frame encoding/decoding support

Browse Source 
3GPP TS 44.021 specifies the format for modified V.110 frames as used
on the GSM air (radio) interface.  Implement encoders and decoders for
this modified V.110 format.

Related: OS#1572
Change-Id: I60a2f2690459359437df20cf4da9043fa7c3ad11
changes/68/31668/5
Harald Welte 6 months ago
parent 065dab866e
commit c4cfb802df
9 changed files with 458 additions and 1 deletions
Show Stats Download Patch File Download Diff File

1
include/osmocom/gsm/Makefile.am
Unescape View File

@ -29,6 +29,7 @@ osmogsm_HEADERS = \
gsm23003.h \
gsm23236.h \
gsm29118.h \
gsm44021.h \
gsm48.h \
gsm48_arfcn_range_encode.h \
gsm48_ie.h \

8
include/osmocom/gsm/gsm44021.h
Unescape View File

@ -0,0 +1,8 @@
#pragma once
#include <osmocom/isdn/v110.h>
int osmo_csd_12k_6k_decode_frame(struct osmo_v110_decoded_frame *fr, const ubit_t *ra_bits, size_t n_bits);
int osmo_csd_12k_6k_encode_frame(ubit_t *ra_bits, size_t ra_bits_size, const struct osmo_v110_decoded_frame *fr);
int osmo_csd_3k6_decode_frame(struct osmo_v110_decoded_frame *fr, const ubit_t *ra_bits, size_t n_bits);
int osmo_csd_3k6_encode_frame(ubit_t *ra_bits, size_t ra_bits_size, const struct osmo_v110_decoded_frame *fr);
void osmo_csd_ubit_dump(FILE *outf, const ubit_t *fr, size_t in_len);

2
src/gsm/Makefile.am
Unescape View File

@ -33,7 +33,7 @@ libgsmint_la_SOURCES = a5.c rxlev_stat.c tlv_parser.c comp128.c comp128v23.c \
gsup.c gsup_sms.c gprs_gea.c gsm0503_conv.c oap.c gsm0808_utils.c \
gsm23003.c gsm23236.c mncc.c bts_features.c oap_client.c \
gsm29118.c gsm48_rest_octets.c cbsp.c gsm48049.c \
gad.c bsslap.c bssmap_le.c kdf.c iuup.c
gad.c bsslap.c bssmap_le.c kdf.c iuup.c gsm44021.c
libgsmint_la_LDFLAGS = -no-undefined
libgsmint_la_LIBADD = $(top_builddir)/src/core/libosmocore.la $(top_builddir)/src/isdn/libosmoisdn.la

303
src/gsm/gsm44021.c
Unescape View File

@ -0,0 +1,303 @@
/*************************************************************************
* GSM CSD modified V.110 frame decoding/encoding (ubits <-> struct with D/S/X/E bits)
*************************************************************************/
/* (C) 2022 by Harald Welte <laforge@osmocom.org>
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <errno.h>
#include <osmocom/core/bits.h>
#include <osmocom/isdn/v110.h>
/*! Decode a 60-bit GSM 12kbit/s CSD frame present as 60 ubits into a struct osmo_v110_decoded_frame.
* \param[out] caller-allocated output data structure, filled by this function
* \param[in] ra_bits One V.110 frame as 60 unpacked bits. */
int osmo_csd_12k_6k_decode_frame(struct osmo_v110_decoded_frame *fr, const ubit_t *ra_bits, size_t n_bits)
{
/* 3GPP TS 44.021 Section 8.1.2 / 8.1.3
D1 D2 D3 D4 D5 D6 S1
D7 D8 D9 D10 D11 D12 X
D13 D14 D15 D16 D17 D18 S3
D19 D20 D21 D22 D23 D24 S4
E4 E5 E6 E7 D25 D26 D27
D28 D29 D30 S6 D31 D32 D33
D34 D35 D36 X D37 D38 D39
D40 D41 D42 S8 D43 D44 D45
D46 D47 D48 S9 */
if (n_bits < 60)
return -EINVAL;
/* X1 .. X2 */
fr->x_bits[0] = ra_bits[1 * 7 + 6];
fr->x_bits[1] = ra_bits[6 * 7 + 3];
/* S1, S3, S4, S6, S8, S9 */
fr->s_bits[0] = ra_bits[0 * 7 + 6];
fr->s_bits[2] = ra_bits[2 * 7 + 6];
fr->s_bits[3] = ra_bits[3 * 7 + 6];
fr->s_bits[5] = ra_bits[5 * 7 + 3];
fr->s_bits[7] = ra_bits[7 * 7 + 3];
fr->s_bits[8] = ra_bits[8 * 7 + 3];
/* E1 .. E3 must be set by out-of-band knowledge! */
/* E4 .. E7 */
memcpy(fr->e_bits+3, ra_bits + 4 * 7 + 0, 4);
/* D-bits */
memcpy(fr->d_bits + 0 * 6 + 0, ra_bits + 0 * 7 + 0, 6);
memcpy(fr->d_bits + 1 * 6 + 0, ra_bits + 1 * 7 + 0, 6);
memcpy(fr->d_bits + 2 * 6 + 0, ra_bits + 2 * 7 + 0, 6);
memcpy(fr->d_bits + 3 * 6 + 0, ra_bits + 3 * 7 + 0, 6);
memcpy(fr->d_bits + 4 * 6 + 0, ra_bits + 4 * 7 + 4, 3);
memcpy(fr->d_bits + 4 * 6 + 3, ra_bits + 5 * 7 + 0, 3);
memcpy(fr->d_bits + 5 * 6 + 0, ra_bits + 5 * 7 + 4, 3);
memcpy(fr->d_bits + 5 * 6 + 3, ra_bits + 6 * 7 + 0, 3);
memcpy(fr->d_bits + 6 * 6 + 0, ra_bits + 6 * 7 + 4, 3);
memcpy(fr->d_bits + 6 * 6 + 3, ra_bits + 7 * 7 + 0, 3);
memcpy(fr->d_bits + 7 * 6 + 0, ra_bits + 7 * 7 + 4, 3);
memcpy(fr->d_bits + 7 * 6 + 3, ra_bits + 8 * 7 + 0, 3);
return 0;
}
int osmo_csd_12k_6k_encode_frame(ubit_t *ra_bits, size_t ra_bits_size, const struct osmo_v110_decoded_frame *fr)
{
if (ra_bits_size < 60)
return -EINVAL;
/* X1 .. X2 */
ra_bits[1 * 7 + 6] = fr->x_bits[0];
ra_bits[6 * 7 + 3] = fr->x_bits[1];
/* S1, S3, S4, S6, S8, S9 */
ra_bits[0 * 7 + 6] = fr->s_bits[0];
ra_bits[2 * 7 + 6] = fr->s_bits[2];
ra_bits[3 * 7 + 6] = fr->s_bits[3];
ra_bits[5 * 7 + 3] = fr->s_bits[5];
ra_bits[7 * 7 + 3] = fr->s_bits[7];
ra_bits[8 * 7 + 3] = fr->s_bits[8];
/* E1 .. E3 are dropped */
/* E4 .. E7 */
memcpy(ra_bits + 4 * 7 + 0, fr->e_bits+3, 4);
/* D-bits */
memcpy(ra_bits + 0 * 7 + 0, fr->d_bits + 0 * 6 + 0, 6);
memcpy(ra_bits + 1 * 7 + 0, fr->d_bits + 1 * 6 + 0, 6);
memcpy(ra_bits + 2 * 7 + 0, fr->d_bits + 2 * 6 + 0, 6);
memcpy(ra_bits + 3 * 7 + 0, fr->d_bits + 3 * 6 + 0, 6);
memcpy(ra_bits + 4 * 7 + 4, fr->d_bits + 4 * 6 + 0, 3);
memcpy(ra_bits + 5 * 7 + 0, fr->d_bits + 4 * 6 + 3, 3);
memcpy(ra_bits + 5 * 7 + 4, fr->d_bits + 5 * 6 + 0, 3);
memcpy(ra_bits + 6 * 7 + 0, fr->d_bits + 5 * 6 + 3, 3);
memcpy(ra_bits + 6 * 7 + 4, fr->d_bits + 6 * 6 + 0, 3);
memcpy(ra_bits + 7 * 7 + 0, fr->d_bits + 6 * 6 + 3, 3);
memcpy(ra_bits + 7 * 7 + 4, fr->d_bits + 7 * 6 + 0, 3);
memcpy(ra_bits + 8 * 7 + 0, fr->d_bits + 7 * 6 + 3, 3);
return 60;
}
/*! Decode a 36-bit GSM 3k6kbit/s CSD frame present as 36 ubits into a struct osmo_v110_decoded_frame.
* \param[out] caller-allocated output data structure, filled by this function
* \param[in] ra_bits One V.110 frame as 36 unpacked bits. */
int osmo_csd_3k6_decode_frame(struct osmo_v110_decoded_frame *fr, const ubit_t *ra_bits, size_t n_bits)
{
/* 3GPP TS 44.021 Section 8.1.4
D1 D2 D3 S1 D4 D5 D6 X
D7 D8 D9 S3 D10 D11 D12 S4
E4 E5 E6 E7 D13 D14 D15 S6
D16 D17 D18 X D19 D20 D21 S8
D22 D23 D24 S9
*/
if (n_bits < 36)
return -EINVAL;
/* X1 .. X2 */
fr->x_bits[0] = ra_bits[0 * 8 + 7];
fr->x_bits[1] = ra_bits[3 * 8 + 3];
/* S1, S3, S4, S6, S8, S9 */
fr->s_bits[0] = ra_bits[0 * 8 + 3];
fr->s_bits[2] = ra_bits[1 * 8 + 3];
fr->s_bits[3] = ra_bits[1 * 8 + 7];
fr->s_bits[5] = ra_bits[2 * 8 + 7];
fr->s_bits[7] = ra_bits[3 * 8 + 7];
fr->s_bits[8] = ra_bits[4 * 8 + 3];
/* E1 .. E3 must be set by out-of-band knowledge! */
/* E4 .. E7 */
memcpy(fr->e_bits+3, ra_bits + 2 * 8 + 0, 4);
/* D-bits */
unsigned int d_idx = 0;
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 0]; /* D1 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 0]; /* D1 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 1]; /* D2 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 1]; /* D2 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 2]; /* D3 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 2]; /* D3 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 4]; /* D4 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 4]; /* D4 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 5]; /* D5 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 5]; /* D5 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 6]; /* D6 */
fr->d_bits[d_idx++] = ra_bits[0 * 8 + 6]; /* D6 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 0]; /* D7 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 0]; /* D7 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 1]; /* D8 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 1]; /* D8 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 2]; /* D9 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 2]; /* D9 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 4]; /* D10 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 4]; /* D10 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 5]; /* D11 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 5]; /* D11 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 6]; /* D12 */
fr->d_bits[d_idx++] = ra_bits[1 * 8 + 6]; /* D12 */
fr->d_bits[d_idx++] = ra_bits[2 * 8 + 4]; /* D13 */
fr->d_bits[d_idx++] = ra_bits[2 * 8 + 4]; /* D13 */
fr->d_bits[d_idx++] = ra_bits[2 * 8 + 5]; /* D14 */
fr->d_bits[d_idx++] = ra_bits[2 * 8 + 5]; /* D14 */
fr->d_bits[d_idx++] = ra_bits[2 * 8 + 6]; /* D15 */
fr->d_bits[d_idx++] = ra_bits[2 * 8 + 6]; /* D15 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 0]; /* D16 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 0]; /* D16 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 1]; /* D17 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 1]; /* D17 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 2]; /* D18 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 2]; /* D18 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 4]; /* D19 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 4]; /* D19 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 5]; /* D20 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 5]; /* D20 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 6]; /* D21 */
fr->d_bits[d_idx++] = ra_bits[3 * 8 + 6]; /* D21 */
fr->d_bits[d_idx++] = ra_bits[4 * 8 + 0]; /* D22 */
fr->d_bits[d_idx++] = ra_bits[4 * 8 + 0]; /* D22 */
fr->d_bits[d_idx++] = ra_bits[4 * 8 + 1]; /* D23 */
fr->d_bits[d_idx++] = ra_bits[4 * 8 + 1]; /* D23 */
fr->d_bits[d_idx++] = ra_bits[4 * 8 + 2]; /* D24 */
fr->d_bits[d_idx++] = ra_bits[4 * 8 + 2]; /* D24 */
OSMO_ASSERT(d_idx == 48);
return 0;
}
int osmo_csd_3k6_encode_frame(ubit_t *ra_bits, size_t ra_bits_size, const struct osmo_v110_decoded_frame *fr)
{
if (ra_bits_size < 36)
return -EINVAL;
/* X1 .. X2 */
ra_bits[0 * 8 + 7] = fr->x_bits[0];
ra_bits[3 * 8 + 3] = fr->x_bits[1];
/* S1, S3, S4, S6, S8, S9 */
ra_bits[0 * 8 + 3] = fr->s_bits[0];
ra_bits[1 * 8 + 3] = fr->s_bits[2];
ra_bits[1 * 8 + 7] = fr->s_bits[3];
ra_bits[2 * 8 + 7] = fr->s_bits[5];
ra_bits[3 * 8 + 7] = fr->s_bits[7];
ra_bits[4 * 8 + 3] = fr->s_bits[8];
/* E1 .. E3 are ignored */
/* E4 .. E7 */
memcpy(ra_bits + 2 * 8 + 0, fr->e_bits+3, 4);
/* D-bits */
unsigned int d_idx = 0;
ra_bits[0 * 8 + 0] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[0 * 8 + 1] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[0 * 8 + 2] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[0 * 8 + 4] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[0 * 8 + 5] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[0 * 8 + 6] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[1 * 8 + 0] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[1 * 8 + 1] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[1 * 8 + 2] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[1 * 8 + 4] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[1 * 8 + 5] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[1 * 8 + 6] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[2 * 8 + 4] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[2 * 8 + 5] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[2 * 8 + 6] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[3 * 8 + 0] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[3 * 8 + 1] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[3 * 8 + 2] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[3 * 8 + 4] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[3 * 8 + 5] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[3 * 8 + 6] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[4 * 8 + 0] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[4 * 8 + 1] = fr->d_bits[d_idx]; d_idx += 2;
ra_bits[4 * 8 + 2] = fr->d_bits[d_idx]; d_idx += 2;
OSMO_ASSERT(d_idx == 48);
return 36;
}
/*! Print a encoded "CSD modififed V.110" frame in the same table-like structure as the spec.
* \param outf output FILE stream to which to dump
* \param[in] fr unpacked bits to dump
* \param[in] in_len length of unpacked bits available at fr. */
void osmo_csd_ubit_dump(FILE *outf, const ubit_t *fr, size_t in_len)
{
switch (in_len) {
case 60:
for (unsigned int septet = 0; septet < 9; septet++) {
if (septet < 8) {
fprintf(outf, "%d\t%d\t%d\t%d\t%d\t%d\t%d\n", fr[septet * 7 + 0],
fr[septet * 7 + 1], fr[septet * 7 + 2], fr[septet * 7 + 3],
fr[septet * 7 + 4], fr[septet * 7 + 5], fr[septet*7 + 6]);
} else {
fprintf(outf, "%d\t%d\t%d\t%d\n", fr[septet * 7 + 0],
fr[septet * 7 + 1], fr[septet * 7 + 2], fr[septet * 7 + 3]);
}
}
break;
case 36:
for (unsigned int octet = 0; octet < 5; octet++) {
if (octet < 4) {
fprintf(outf, "%d\t%d\t%d\t%d\t%d\t%d\t%d\t%d\n",
fr[octet * 8 + 0], fr[octet * 8 + 1], fr[octet * 8 + 2],
fr[octet * 8 + 3], fr[octet * 8 + 4], fr[octet * 8 + 5],
fr[octet * 8 + 6], fr[octet * 8 + 7]);
} else {
fprintf(outf, "%d\t%d\t%d\t%d\n", fr[octet * 8 + 0],
fr[octet * 8 + 1], fr[octet * 8 + 2], fr[octet * 8 + 3]);
}
}
break;
default:
fprintf(outf, "invalid input data length: %zu\n", in_len);
}
}

6
src/gsm/libosmogsm.map
Unescape View File

@ -791,5 +791,11 @@ osmo_iuup_rnl_prim_down;
osmo_iuup_rnl_prim_alloc;
osmo_iuup_tnl_prim_alloc;
osmo_csd_12k_6k_decode_frame;
osmo_csd_12k_6k_encode_frame;
osmo_csd_3k6_decode_frame;
osmo_csd_3k6_encode_frame;
osmo_csd_ubit_dump;
local: *;
};

9
tests/Makefile.am
Unescape View File

@ -52,6 +52,7 @@ check_PROGRAMS = timer/timer_test sms/sms_test ussd/ussd_test \
auth/xor2g_test \
v110/test_frame \
v110/test_ra1 \
gsm44021/test_frame_csd \
$(NULL)
if ENABLE_MSGFILE
@ -347,6 +348,11 @@ v110_test_frame_LDADD = $(LDADD) $(top_builddir)/src/isdn/libosmoisdn.la
v110_test_ra1_SOURCES = v110/test_ra1.c
v110_test_ra1_LDADD = $(LDADD) $(top_builddir)/src/isdn/libosmoisdn.la
gsm44021_test_frame_csd_SOURCES = gsm44021/test_frame_csd.c
gsm44021_test_frame_csd_LDADD = $(LDADD) $(top_builddir)/src/isdn/libosmoisdn.la \
$(top_builddir)/src/gsm/libosmogsm.la
# The `:;' works around a Bash 3.2 bug when the output is not writeable.
$(srcdir)/package.m4: $(top_srcdir)/configure.ac
:;{ \
@ -447,6 +453,7 @@ EXTRA_DIST = testsuite.at $(srcdir)/package.m4 $(TESTSUITE) \
smscb/cbsp_test.ok \
v110/test_frame.ok \
v110/test_ra1.ok \
gsm44021/test_frame_csd.ok \
$(NULL)
if ENABLE_LIBSCTP
@ -654,6 +661,8 @@ endif
>$(srcdir)/v110/test_frame.ok
v110/test_ra1 \
>$(srcdir)/v110/test_ra1.ok
gsm44021/test_frame_csd \
>$(srcdir)/gsm44021/test_frame_csd.ok
check-local: atconfig $(TESTSUITE)
[ -e /proc/cpuinfo ] && cat /proc/cpuinfo

93
tests/gsm44021/test_frame_csd.c
Unescape View File

@ -0,0 +1,93 @@
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <osmocom/core/bits.h>
#include <osmocom/isdn/v110.h>
#include <osmocom/gsm/gsm44021.h>
static void fill_v110_frame(struct osmo_v110_decoded_frame *fr)
{
unsigned int i;
memset(fr, 0, sizeof(*fr));
/* we abuse the fact that ubit_t is 8bit so we can actually
* store integer values to clearly identify which bit ends up where */
/* D1..D48: 101..148 */
for (i = 0; i < ARRAY_SIZE(fr->d_bits); i++)
fr->d_bits[i] = 101 + i;
/* E1..E7: 201..207 */
for (i = 0; i < ARRAY_SIZE(fr->e_bits); i++)
fr->e_bits[i] = 201 + i;
/* S1..S9: 211..219 */
for (i = 0; i < ARRAY_SIZE(fr->s_bits); i++)
fr->s_bits[i] = 211 + i;
/* X1..X2: 221..222 */
for (i = 0; i < ARRAY_SIZE(fr->x_bits); i++)
fr->x_bits[i] = 221 + i;
}
static void test_frame_enc_12k_6k(void)
{
struct osmo_v110_decoded_frame fr;
ubit_t bits[60];
printf("Testing Frame Encoding for 12k/6k radio interface rate\n");
fill_v110_frame(&fr);
/* run encoder and dump to stdout */
memset(bits, 0xff, sizeof(bits));
osmo_csd_12k_6k_encode_frame(bits, sizeof(bits), &fr);
osmo_csd_ubit_dump(stdout, bits, sizeof(bits));
/* run decoder on what we just encoded */
memset(&fr, 0, sizeof(fr));
osmo_csd_12k_6k_decode_frame(&fr, bits, sizeof(bits));
/* re-encode and dump again 'expout' will match it. */
memset(bits, 0xff, sizeof(bits));
osmo_csd_12k_6k_encode_frame(bits, sizeof(bits), &fr);
osmo_csd_ubit_dump(stdout, bits, sizeof(bits));
}
static void test_frame_enc_3k6(void)
{
struct osmo_v110_decoded_frame fr;
ubit_t bits[36];
printf("Testing Frame Encoding for 3.6k radio interface rate\n");
fill_v110_frame(&fr);
/* different D-bit numbering for 3k6, see TS 44.021 Section 8.1.4 */
for (unsigned int i = 0; i < ARRAY_SIZE(fr.d_bits); i++)
fr.d_bits[i] = 101 + i/2;
/* run encoder and dump to stdout */
memset(bits, 0xff, sizeof(bits));
osmo_csd_3k6_encode_frame(bits, sizeof(bits), &fr);
osmo_csd_ubit_dump(stdout, bits, sizeof(bits));
/* run decoder on what we just encoded */
memset(&fr, 0, sizeof(fr));
osmo_csd_3k6_decode_frame(&fr, bits, sizeof(bits));
/* re-encode and dump again 'expout' will match it. */
memset(bits, 0xff, sizeof(bits));
osmo_csd_3k6_encode_frame(bits, sizeof(bits), &fr);
osmo_csd_ubit_dump(stdout, bits, sizeof(bits));
}
int main(int argc, char **argv)
{
test_frame_enc_12k_6k();
printf("\n");
test_frame_enc_3k6();
}

31
tests/gsm44021/test_frame_csd.ok
Unescape View File

@ -0,0 +1,31 @@
Testing Frame Encoding for 12k/6k radio interface rate
101 102 103 104 105 106 211
107 108 109 110 111 112 221
113 114 115 116 117 118 213
119 120 121 122 123 124 214
204 205 206 207 125 126 127
128 129 130 216 131 132 133
134 135 136 222 137 138 139
140 141 142 218 143 144 145
146 147 148 219
101 102 103 104 105 106 211
107 108 109 110 111 112 221
113 114 115 116 117 118 213
119 120 121 122 123 124 214
204 205 206 207 125 126 127
128 129 130 216 131 132 133
134 135 136 222 137 138 139
140 141 142 218 143 144 145
146 147 148 219
Testing Frame Encoding for 3.6k radio interface rate
101 102 103 211 104 105 106 221
107 108 109 213 110 111 112 214
204 205 206 207 113 114 115 216
116 117 118 222 119 120 121 218
122 123 124 219
101 102 103 211 104 105 106 221
107 108 109 213 110 111 112 214
204 205 206 207 113 114 115 216
116 117 118 222 119 120 121 218
122 123 124 219

6
tests/testsuite.at
Unescape View File

@ -502,3 +502,9 @@ AT_KEYWORDS([v110_test_ra1])
cat $abs_srcdir/v110/test_ra1.ok > expout
AT_CHECK([$abs_top_builddir/tests/v110/test_ra1], [], [expout],[])
AT_CLEANUP
AT_SETUP([gsm44021_test_frame_csd])
AT_KEYWORDS([gsm44021_test_frame_csd])
cat $abs_srcdir/gsm44021/test_frame_csd.ok > expout
AT_CHECK([$abs_top_builddir/tests/gsm44021/test_frame_csd], [], [expout],[])
AT_CLEANUP

Write Preview
Loading…
Cancel
Save