tests/dtx: test detection/decoding of A[FH]S_SID_UPDATE
This patch extends the existing unit test coverage for AMR's special
DTX frames. The new tests confirm that the problem with unexpected
BER in decoded AFS_SID_UPDATE frames has been actually fixed [1].
Additionally this patch demonstrates another TCH/AHS specific problem,
which negatively affects RxQual-SUB measurements in osmo-bts-trx: the
actual content of AHS_SID_UPDATE_CN is decoded with ~50% BER, because
the burst buffer contains only half of the burst bits.
Change-Id: I434157e2091a306c039123cea08d84bd8533c937
Related: [1] I813081a4c0865958eee2496fe251ae17235ac842
Related: SYS#5853
diff --git a/tests/dtx/dtx_gsm0503_test.ok b/tests/dtx/dtx_gsm0503_test.ok
index 77a4936..5f49cb0 100644
--- a/tests/dtx/dtx_gsm0503_test.ok
+++ b/tests/dtx/dtx_gsm0503_test.ok
@@ -9,3 +9,15 @@
==> AHS_ONSET, n_errors=0, n_bits_total=114
==> AHS_SID_FIRST_INH, n_errors=0, n_bits_total=212
==> AHS_SID_UPDATE_INH, n_errors=0, n_bits_total=212
+Running test_gsm0503_tch_afhs_decode_dtx(at offset=0): testing detection of AFS_SID_UPDATE
+ ==> gsm0503_tch_afs_decode_dtx() yields 'AFS_SID_UPDATE (marker)' (rc=0, BER 0/212)
+Running test_gsm0503_tch_afhs_decode_dtx(at offset=464): testing decoding of AFS_SID_UPDATE
+ ==> gsm0503_tch_afs_decode_dtx() yields 'AFS_SID_UPDATE_CN (audio)' (rc=5, BER 0/212)
+ ====> tch_data[] = { 26e9b1d2b0 }
+Running test_gsm0503_tch_afhs_decode_dtx(at offset=0): testing detection/decoding of AHS_SID_UPDATE
+ ==> gsm0503_tch_ahs_decode_dtx() yields 'AMR_OTHER (audio)' (rc=-1, BER 109/212)
+Running test_gsm0503_tch_afhs_decode_dtx(at offset=232): testing detection/decoding of AHS_SID_UPDATE
+ ==> gsm0503_tch_ahs_decode_dtx() yields 'AHS_SID_UPDATE (marker)' (rc=0, BER 0/212)
+Running test_gsm0503_tch_afhs_decode_dtx(at offset=464): testing detection/decoding of AHS_SID_UPDATE
+ ==> gsm0503_tch_ahs_decode_dtx() yields 'AHS_SID_UPDATE_CN (audio)' (rc=5, BER 106/212)
+ ====> tch_data[] = { 6003ccb270 }