diff options
Diffstat (limited to 'tests/dtx/dtx_gsm0503_test.c')
| -rw-r--r-- | tests/dtx/dtx_gsm0503_test.c | 168 |
1 files changed, 152 insertions, 16 deletions
diff --git a/tests/dtx/dtx_gsm0503_test.c b/tests/dtx/dtx_gsm0503_test.c index f3003133..21d1751e 100644 --- a/tests/dtx/dtx_gsm0503_test.c +++ b/tests/dtx/dtx_gsm0503_test.c @@ -15,18 +15,18 @@ * 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 General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * */ #include <string.h> #include <stdio.h> #include <stdint.h> #include <osmocom/core/utils.h> +#include <osmocom/coding/gsm0503_coding.h> #include <osmocom/coding/gsm0503_amr_dtx.h> +/* Length of payload bits in a Normal Burst */ +#define BURST_PLEN (57 * 2 + 2) + char sample_afs_sid_frame[] = { "111111110000000011001100101010100100010011111111001000100111011110011001001100111100110010011001111011100100010011111111001000100111011110011001001100111100110010011001111011100100010011111111001000100111011110011001001100111100110010011001111011100100010011111111001000100111011110011001001100111100110010011001111011100100010011111111001000100111011110011001001100111100110010011001111011100100010011111111001000100111011110011001001100111100110010011001" @@ -72,7 +72,7 @@ char sample_sid_update_inh_frame[] = "xBxBxBxBxBxBxBxBxBxBxBxBxBxBxBxBx0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1x1x1x1x0x0x1x0x0x1" }; -unsigned int string_to_ubit(ubit_t * ubits, char *string) +unsigned int string_to_sbit(sbit_t *sbits, char *string) { unsigned int len; unsigned int i; @@ -80,7 +80,7 @@ unsigned int string_to_ubit(ubit_t * ubits, char *string) len = strlen(string); for (i = 0; i < len; i++) { - ubits[i] = string[i] & 1; + sbits[i] = string[i] == '1' ? -127 : 127; } return len; @@ -88,28 +88,161 @@ unsigned int string_to_ubit(ubit_t * ubits, char *string) void test_gsm0503_detect_afs_dtx_frame(char *string) { - ubit_t ubits[512]; + sbit_t sbits[512]; uint8_t dtx_frame_type; int n_errors; int n_bits_total; + int mode_id = -1; - string_to_ubit(ubits, string); - dtx_frame_type = gsm0503_detect_afs_dtx_frame(&n_errors, &n_bits_total, ubits); - printf(" ==> %s, n_errors=%i, n_bits_total=%i\n", gsm0503_amr_dtx_frame_name(dtx_frame_type), - n_errors, n_bits_total); + string_to_sbit(sbits, string); + dtx_frame_type = gsm0503_detect_afs_dtx_frame2(&n_errors, &n_bits_total, &mode_id, sbits); + printf(" ==> %s, n_errors=%d, n_bits_total=%d, mode_id=%d\n", + gsm0503_amr_dtx_frame_name(dtx_frame_type), + n_errors, n_bits_total, mode_id); } void test_gsm0503_detect_ahs_dtx_frame(char *string) { - ubit_t ubits[512]; + sbit_t sbits[512]; uint8_t dtx_frame_type; int n_errors; int n_bits_total; + int mode_id = -1; + + string_to_sbit(sbits, string); + dtx_frame_type = gsm0503_detect_ahs_dtx_frame2(&n_errors, &n_bits_total, &mode_id, sbits); + printf(" ==> %s, n_errors=%d, n_bits_total=%d, mode_id=%d\n", + gsm0503_amr_dtx_frame_name(dtx_frame_type), + n_errors, n_bits_total, mode_id); +} + +static void test_gsm0503_tch_afhs_decode_dtx(const sbit_t *bursts, size_t offset, + enum gsm0503_amr_dtx_frames *amr_last_dtx, + bool full_rate, const char *test_desc) +{ + uint8_t tch_data[128]; /* just to be safe */ + int n_errors = 0, n_bits_total = 0; + int rc; + + printf("Running %s(at offset=%zu): testing %s\n", __func__, offset, test_desc); + + /* Dummy (not really important) values */ + uint8_t codec[4] = { 0, 1, 2, 3 }; + int codecs = ARRAY_SIZE(codec); + uint8_t ul_cmr = 0; + uint8_t ul_ft = 0; + + if (full_rate) { + rc = gsm0503_tch_afs_decode_dtx(&tch_data[0], &bursts[offset], false, + codec, codecs, &ul_ft, &ul_cmr, + &n_errors, &n_bits_total, + (uint8_t *)amr_last_dtx); + } else { + rc = gsm0503_tch_ahs_decode_dtx(&tch_data[0], &bursts[offset], false, false, + codec, codecs, &ul_ft, &ul_cmr, + &n_errors, &n_bits_total, + (uint8_t *)amr_last_dtx); + } + printf(" ==> gsm0503_tch_a%cs_decode_dtx() yields '%s' (rc=%d, BER %d/%d)\n", + full_rate ? 'f' : 'h', gsm0503_amr_dtx_frame_name(*amr_last_dtx), + rc, n_errors, n_bits_total); + if (rc > 0) + printf(" ====> tch_data[] = { %s }\n", osmo_hexdump_nospc(tch_data, rc)); +} + +static void test_gsm0503_tch_afhs_decode_dtx_sid_update(void) +{ + enum gsm0503_amr_dtx_frames amr_last_dtx = AMR_OTHER; + sbit_t bursts[BURST_PLEN * 12]; /* 12 bursts */ + int rc; + + /* 456 soft-bits containing an AFS_SID_UPDATE frame (captured on the air) */ + const char *afs_sid_update = \ + "94 81 83 76 7b 81 6b 7f 76 8c 81 81 81 86 71 7f 75 81 6d 7a 81 6b 7f 78 8a 87 70 75 8e" + "81 8d 7f 81 70 72 81 7f 85 86 7f 93 81 8a 74 7f 71 89 8a 75 7f 7f 78 8c 81 8b 7f 81 7f" + "7f 7f 70 8a 8b 7f 90 81 81 81 8a 77 7f 7f 70 81 70 71 86 8e 7f 81 7f 81 75 72 87 8c 76" + "7f 72 8e 81 81 81 81 92 7f 8c 81 92 7f 8c 89 7f 81 7f 8f 8b 77 76 86 8c 78 73 88 81 8b" + "81 7f 8c 85 77 7b 8d 81 81 81 8b 7f 81 7f 8e 81 8e 7f 8a 8a 7f 93 85 6b 7f 7f 72 81 6f" + "76 89 81 81 81 8a 73 7f 72 88 87 73 7f 73 81 7f 81 7f 92 87 73 78 81 6f 7f 71 81 76 77" + "6f 81 7f 81 71 7f 6e 81 75 77 83 81 81 90 7f 8b 88 76 76 8a 8d 76 74 81 7f 92 81 81 8b" + "78 72 81 77 76 81 6c 7c 8b 81 81 8d 7f 8b 81 8e 74 7f 7f 72 81 7f 81 74 7f 71 81 75 7f" + "8e 81 81 8c 72 79 85 8c 78 75 8c 8a 7f 90 81 8e 77 77 81 70 7f 7f 71 81 7f 81 7f 8e 89" + "7f 8f 81 8f 7f 8c 8d 7f 81 7f 81 6f 7f 71 8a 87 7f 81 6f 77 81 7f 8d 88 73 79 8a 8a 7f" + "7f 7f 7f 7f 76 8b 81 8c 77 7c 8a 81 91 7f 81 76 79 81 71 7f 7f 6f 84 8e 78 7f 7f 7f 74" + "88 86 7b 77 81 6f 7f 7f 7f 7f 7f 75 81 70 7f 76 89 81 81 81 8d 78 74 84 81 8e 7f 8d 8a" + "7f 79 8c 87 7f 81 7f 81 6f 7f 75 8d 8a 7f 81 7f 92 81 81 85 76 7f 6f 8c 88 6c 7f 73 91" + "81 8d 71 7f 7f 73 8d 88 7f 81 7f 91 86 6f 7f 73 8e 81 8d 79 78 81 72 74 8c 86 72 7f 77" + "6e 81 7f 81 77 76 81 72 74 81 6f 7f 6f 8d 81 91 7f 81 6d 7f 6d 81 6c 7f 6c 81 7f 81 7f" + "8c 8b 7f 8e 89 74 74 8c 81 81 81 81 81 92 7f 8e 8b 7f 93 81 8f 7f 90 81 8d 74 7b 8b 89"; - string_to_ubit(ubits, string); - dtx_frame_type = gsm0503_detect_ahs_dtx_frame(&n_errors, &n_bits_total, ubits); - printf(" ==> %s, n_errors=%i, n_bits_total=%i\n", gsm0503_amr_dtx_frame_name(dtx_frame_type), - n_errors, n_bits_total); + memset(&bursts[0], 0, sizeof(bursts)); + rc = osmo_hexparse(afs_sid_update, (uint8_t *)&bursts[BURST_PLEN * 4], BURST_PLEN * 8); + OSMO_ASSERT(rc == BURST_PLEN * 4); + + /* Test detection of AFS_SID_UPDATE (marker) */ + test_gsm0503_tch_afhs_decode_dtx(&bursts[0], BURST_PLEN * 0, &amr_last_dtx, true /* AFS */, + "detection of AFS_SID_UPDATE"); + + /* Test decoding of AFS_SID_UPDATE_CN (actual SID) */ + test_gsm0503_tch_afhs_decode_dtx(&bursts[0], BURST_PLEN * 4, &amr_last_dtx, true /* AFS */, + "decoding of AFS_SID_UPDATE"); + + /* 456 soft-bits containing an AHS_SID_UPDATE frame (captured on the air) */ + const char *ahs_sid_update = \ + "81 67 7f 7f 7f 71 8f 88 6f 73 81 7e 81 6b 7f 7e 7d 6f 8f 8a 72 76 92 81 82 81 8f 6d 6f" + "81 7f 92 8c 7f 97 81 8e 6f 7f 7c 7f 6e 81 7e 81 6e 73 81 7f 93 8d 6f 7f 6c 81 6b 7f 72" + "7c 7c 7d 7f 6f 8f 81 94 7f 92 8d 6e 7d 7d 7f 6c 8b 8e 73 71 81 7f 92 90 7f 81 6e 6e 81" + "7f 94 8e 70 7f 6e 8c 8d 77 7f 6a 81 7f 81 70 6d 81 6c 71 8c 91 7f 90 8e 73 6e 81 6d 7f" + "81 8b 71 6e 81 7f 82 7c 81 7f 81 6d 73 81 6c 6d 81 6d 7f 6e 81 7e 81 6b 7f 7f 7f 6b 81" + "6e 6f 81 68 7f 71 91 81 82 81 8e 70 7f 7c 7d 7f 70 81 7f 91 8f 7f 81 6c 7f 71 81 6d 74" + "6f 8f 81 92 7f 82 7f 91 8b 7f 81 6b 7f 6d 81 6b 6f 81 6f 6e 90 81 81 92 7f 94 81 95 7f" + "96 81 96 70 7f 72 8f 81 95 7f 81 6f 70 81 7f 90 92 7f 81 6c 70 81 6b 7f 6f 8d 8d 7f 81" + "77 81 6a 7e 7e 73 92 8c 7f 81 6a 7f 6c 8e 8e 6e 7f 71 8e 8d 7e 81 6d 7f 6c 81 6d 6c 81" + "7f 94 81 92 7f 97 81 92 6e 7f 70 8c 8b 73 73 91 81 93 7f 81 70 72 81 7d 81 71 70 81 7f" + "7d 7f 6d 90 8d 73 76 92 81 92 6f 7d 7d 70 91 81 8f 73 75 8c 90 7f 94 81 91 70 7f 7d 7e" + "70 8d 8d 73 7f 7c 7e 6a 81 7e 81 6d 7f 6a 81 6f 7f 7f 71 8e 81 82 81 81 81 96 72 7e 7d" + "81 8d 7f 81 68 7f 7e 7c 7b 7f 6c 81 6a 7f 7f 71 8f 8d 7f 81 6c 72 8e 88 70 70 81 6d 70" + "8d 90 7f 81 7e 95 81 94 7f 92 8b 6e 7f 7f 70 8c 8c 73 75 91 81 91 6d 7d 7e 7b 7c 7d 71" + "6c 89 91 7f 81 7f 95 81 93 7f 95 90 7f 81 6d 70 81 6f 75 8c 8e 75 71 81 6e 70 8d 8d 7f" + "91 92 7f 81 7f 94 8d 70 71 81 6e 6d 81 6e 75 8e 81 93 70 7f 70 8f 8c 7f 81 6d 6f 81 6a"; + + memset(&bursts[0], 0, sizeof(bursts)); + rc = osmo_hexparse(ahs_sid_update, (uint8_t *)&bursts[BURST_PLEN * 2], BURST_PLEN * 10); + OSMO_ASSERT(rc == BURST_PLEN * 4); + + /* Test detection and decoding of AHS_SID_UPDATE */ + test_gsm0503_tch_afhs_decode_dtx(&bursts[0], BURST_PLEN * 0, &amr_last_dtx, false /* AHS */, + "detection/decoding of AHS_SID_UPDATE"); + test_gsm0503_tch_afhs_decode_dtx(&bursts[0], BURST_PLEN * 2, &amr_last_dtx, false /* AHS */, + "detection/decoding of AHS_SID_UPDATE"); + test_gsm0503_tch_afhs_decode_dtx(&bursts[0], BURST_PLEN * 4, &amr_last_dtx, false /* AHS */, + "detection/decoding of AHS_SID_UPDATE"); +} + +static void test_gsm0503_tch_afhs_decode_dtx_facch(void) +{ + enum gsm0503_amr_dtx_frames amr_last_dtx; + sbit_t bursts[BURST_PLEN * 8]; /* 8 bursts */ + unsigned int i; + + /* Set stealing bits to provoke FACCH/[FH] detection */ + for (i = 0; i < 8; i++) { + sbit_t *burst = &bursts[BURST_PLEN * i]; + memset(&burst[0], 0, BURST_PLEN); + burst[i >> 2 ? 57 : 58] = -127; + } + + amr_last_dtx = AFS_SID_UPDATE; + test_gsm0503_tch_afhs_decode_dtx(&bursts[0], BURST_PLEN * 0, + &amr_last_dtx, true /* AFS */, + "tagging of FACCH/F"); + OSMO_ASSERT(amr_last_dtx == AMR_OTHER); + + amr_last_dtx = AHS_SID_UPDATE; + test_gsm0503_tch_afhs_decode_dtx(&bursts[0], BURST_PLEN * 0, + &amr_last_dtx, false /* AHS */, + "tagging of FACCH/H"); + OSMO_ASSERT(amr_last_dtx == AMR_OTHER); } int main(int argc, char **argv) @@ -126,5 +259,8 @@ int main(int argc, char **argv) test_gsm0503_detect_ahs_dtx_frame(sample_sid_first_inh_frame); test_gsm0503_detect_ahs_dtx_frame(sample_sid_update_inh_frame); + test_gsm0503_tch_afhs_decode_dtx_sid_update(); + test_gsm0503_tch_afhs_decode_dtx_facch(); + return EXIT_SUCCESS; } |