From 92db150488bdadf6577a4968feabd5a3ab694c5e Mon Sep 17 00:00:00 2001 From: Max Date: Wed, 25 May 2016 18:13:51 +0200 Subject: Add helper functions for AMR codec * add functions to encode/decode various codec paramters from RTP payload with AMR frame according to RFC 4867 * those functions are extended version based on code from osmo-bts' amr.c by Andreas Eversberg * add corresponding enum types and strings for logging * add regression tests It's useful both to replace manual parsing in osmo-bts with fuctions covered by test suite and as a debugging helpers for issues related to AMR. Change-Id: Ia217679a07d3fbc970f435e20f6eac33d34bd597 Related: OS#1562 Reviewed-on: https://gerrit.osmocom.org/118 Tested-by: Jenkins Builder Reviewed-by: Holger Freyther --- tests/codec/codec_test.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++ tests/codec/codec_test.ok | 9 +++++ 2 files changed, 95 insertions(+) create mode 100644 tests/codec/codec_test.c create mode 100644 tests/codec/codec_test.ok (limited to 'tests/codec') diff --git a/tests/codec/codec_test.c b/tests/codec/codec_test.c new file mode 100644 index 00000000..4905dd39 --- /dev/null +++ b/tests/codec/codec_test.c @@ -0,0 +1,86 @@ +/* + * (C) 2016 by Sysmocom s.f.m.c. GmbH + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation; either version 3 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. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + * + */ + +#include +#include +#include + +#include +#include + +const uint8_t sid_update[] = {0x20, 0x44, 0x29, 0xc2, 0x92, 0x91, 0xf4}; +const uint8_t sid_first[] = {0x20, 0x44, 0x00, 0x00, 0x00, 0x00, 0x04}; + +#define PAYLOAD_LEN 34 +#define SID_LEN 7 + +static const char * cmpr(int a, int b) +{ + return (a == b) ? "OK" : "BAD"; +} + +static void test_sid_dec(const uint8_t *t, size_t len) +{ + uint8_t cmr, tmp[SID_LEN]; + enum osmo_amr_type ft; + enum osmo_amr_quality bfi; + int8_t sti, cmi; + memcpy(tmp, t, SID_LEN); + int rc = osmo_amr_rtp_dec(tmp, len, &cmr, &cmi, &ft, &bfi, &sti); + printf("[%d] decode RTP %s%s: FT %s, CMR %s, CMI is %d, SID type %s\t", + rc, osmo_hexdump(tmp, len), cmpr(bfi, AMR_GOOD), + get_value_string(osmo_amr_type_names, ft), + get_value_string(osmo_amr_type_names, cmr), + cmi, sti ? "UPDATE" : "FIRST"); + if (sti == -1) + printf("FAIL: incompatible STI for SID\n"); + rc = osmo_amr_rtp_enc(tmp, cmr, ft, bfi); + printf("[%d] encode [%d]\n", rc, memcmp(tmp, t, SID_LEN)); +} + +static void test_amr_rt(uint8_t _cmr, enum osmo_amr_type _ft, + enum osmo_amr_quality _bfi) +{ + uint8_t cmr, payload[PAYLOAD_LEN]; + enum osmo_amr_type ft; + enum osmo_amr_quality bfi; + int8_t sti, cmi; + int rc, re = osmo_amr_rtp_enc(payload, _cmr, _ft, _bfi); + rc = osmo_amr_rtp_dec(payload, PAYLOAD_LEN, &cmr, &cmi, &ft, &bfi, &sti); + printf("[%d/%d] %s, CMR: %s, FT: %s, BFI: %s, CMI: %d, STI: %d\n", re, + rc, get_value_string(osmo_amr_type_names, ft), + cmpr(_cmr, cmr), cmpr(_ft, ft), cmpr(_bfi, bfi), cmi, sti); +} + +int main(int argc, char **argv) +{ + printf("AMR RTP payload decoder test:\n"); + test_sid_dec(sid_first, 7); + test_sid_dec(sid_update, 7); + test_amr_rt(0, AMR_NO_DATA, AMR_BAD); + test_amr_rt(0, AMR_NO_DATA, AMR_GOOD); + test_amr_rt(AMR_12_2, AMR_12_2, AMR_BAD); + test_amr_rt(AMR_12_2, AMR_12_2, AMR_GOOD); + test_amr_rt(AMR_7_40, AMR_7_40, AMR_BAD); + test_amr_rt(AMR_7_40, AMR_7_40, AMR_GOOD); + + return 0; +} + + diff --git a/tests/codec/codec_test.ok b/tests/codec/codec_test.ok new file mode 100644 index 00000000..0f76fefc --- /dev/null +++ b/tests/codec/codec_test.ok @@ -0,0 +1,9 @@ +AMR RTP payload decoder test: +[2] decode RTP 20 44 00 00 00 00 04 OK: FT AMR SID, CMR AMR 5,90 kbit/s, CMI is 2, SID type FIRST [2] encode [0] +[2] decode RTP 20 44 29 c2 92 91 f4 OK: FT AMR SID, CMR AMR 5,90 kbit/s, CMI is 2, SID type UPDATE [2] encode [0] +[2/2] No Data/NA, CMR: OK, FT: OK, BFI: OK, CMI: -1, STI: -1 +[2/2] No Data/NA, CMR: OK, FT: OK, BFI: OK, CMI: -1, STI: -1 +[33/33] AMR 12,2 kbit/s (GSM-EFR), CMR: OK, FT: OK, BFI: OK, CMI: -1, STI: -1 +[33/33] AMR 12,2 kbit/s (GSM-EFR), CMR: OK, FT: OK, BFI: OK, CMI: -1, STI: -1 +[21/21] AMR 7,40 kbit/s (TDMA-EFR), CMR: OK, FT: OK, BFI: OK, CMI: -1, STI: -1 +[21/21] AMR 7,40 kbit/s (TDMA-EFR), CMR: OK, FT: OK, BFI: OK, CMI: -1, STI: -1 -- cgit v1.2.3