measurement: add unit tests for ts45008_83_is_sub()

The function ts45008_83_is_sub() is an integral part of the measurement
calculation as it automatically tags incoming measurements as SUB
measurements. This is important in the context of DTX. Unfortunately
there is no unit test for this function yet.

- Add unit test for ts45008_83_is_sub()

Change-Id: Ia26774859f4bf31baee075896905079368bddd42
Related: OS#3502

2 files changed, 158 insertions, 0 deletions

diff --git a/tests/meas/meas_test.c b/tests/meas/meas_test.c
index 01667718..4009ddb9 100644
--- a/tests/meas/meas_test.c
+++ b/tests/meas/meas_test.c
@@ -719,6 +719,138 @@ void test_lchan_meas_process_measurement(bool no_sacch, bool dropouts)
 	}
 }
 
+static bool test_ts45008_83_is_sub_is_sacch(uint32_t fn)
+{
+	if (fn % 104 == 12)
+		return true;
+	if (fn % 104 == 25)
+		return true;
+	if (fn % 104 == 38)
+		return true;
+	if (fn % 104 == 51)
+		return true;
+	if (fn % 104 == 64)
+		return true;
+	if (fn % 104 == 77)
+		return true;
+	if (fn % 104 == 90)
+		return true;
+	if (fn % 104 == 103)
+		return true;
+
+	return false;
+}
+
+static bool test_ts45008_83_is_sub_is_sub(uint32_t fn, uint8_t ss)
+{
+	fn = fn % 104;
+
+	if (fn >= 52 && fn <= 59)
+		return true;
+
+	if (ss == 0) {
+		if (fn == 0)
+			return true;
+		if (fn == 2)
+			return true;
+		if (fn == 4)
+			return true;
+		if (fn == 6)
+			return true;
+		if (fn == 52)
+			return true;
+		if (fn == 54)
+			return true;
+		if (fn == 56)
+			return true;
+		if (fn == 58)
+			return true;
+	} else if (ss == 1) {
+		if (fn == 14)
+			return true;
+		if (fn == 16)
+			return true;
+		if (fn == 18)
+			return true;
+		if (fn == 20)
+			return true;
+		if (fn == 66)
+			return true;
+		if (fn == 68)
+			return true;
+		if (fn == 70)
+			return true;
+		if (fn == 72)
+			return true;
+	} else
+		OSMO_ASSERT(false);
+
+	return false;
+}
+
+static void test_ts45008_83_is_sub_single(uint8_t ts, uint8_t ss, bool fr)
+{
+	struct gsm_lchan *lchan;
+	bool rc;
+	unsigned int i;
+
+	lchan = &trx->ts[ts].lchan[ss];
+
+	printf("Checking: ");
+
+	if (fr) {
+		printf("TCH/F");
+		lchan->type = GSM_LCHAN_TCH_F;
+		lchan->ts->pchan = GSM_PCHAN_TCH_F;
+		lchan->tch_mode = GSM48_CMODE_SPEECH_V1;
+	} else {
+		printf("TCH/H");
+		lchan->type = GSM_LCHAN_TCH_H;
+		lchan->ts->pchan = GSM_PCHAN_TCH_H;
+		lchan->tch_mode = GSM48_CMODE_SPEECH_V1;
+	}
+
+	printf(" TS=%u ", ts);
+	printf("SS=%u", ss);
+
+	/* Walk trough the first 100 intervals and check for unexpected
+	 * results (false positive and false negative) */
+	for (i = 0; i < 104 * 100; i++) {
+		rc = ts45008_83_is_sub(lchan, i, false);
+		if (rc) {
+			if (!test_ts45008_83_is_sub_is_sacch(i)
+			    && !test_ts45008_83_is_sub_is_sub(i, ss)) {
+				printf("==> Unexpected SUB frame at fn=%u", i);
+				OSMO_ASSERT(false);
+			}
+		} else {
+			if (test_ts45008_83_is_sub_is_sacch(i)
+			    && test_ts45008_83_is_sub_is_sub(i, ss)) {
+				printf("==> Unexpected non-SUB frame at fn=%u",
+				       i);
+				OSMO_ASSERT(false);
+			}
+		}
+	}
+	printf("\n");
+}
+
+static void test_ts45008_83_is_sub(void)
+{
+	unsigned int i;
+
+	printf("\n\n");
+	printf("===========================================================\n");
+	printf("Testing ts45008_83_is_sub()\n");
+
+	for (i = 0; i < 7; i++)
+		test_ts45008_83_is_sub_single(i, 0, true);
+	for (i = 0; i < 7; i++)
+		test_ts45008_83_is_sub_single(i, 0, false);
+	for (i = 0; i < 7; i++)
+		test_ts45008_83_is_sub_single(i, 1, false);
+}
+
 int main(int argc, char **argv)
 {
 	void *tall_bts_ctx;
@@ -785,6 +917,7 @@ int main(int argc, char **argv)
 	test_lchan_meas_process_measurement(true, false);
 	test_lchan_meas_process_measurement(false, true);
 	test_lchan_meas_process_measurement(true, true);
+	test_ts45008_83_is_sub();
 
 	printf("Success\n");
 
diff --git a/tests/meas/meas_test.ok b/tests/meas/meas_test.ok
index d8f81744..ac32acf6 100644
--- a/tests/meas/meas_test.ok
+++ b/tests/meas/meas_test.ok
@@ -1055,4 +1055,29 @@ Testing lchan_meas_process_measurement()
 (leaving out measurement sample for SACCH block)
 (leaving out measurement sample for SACCH block)
 (leaving out measurement sample for SACCH block)
+
+
+===========================================================
+Testing ts45008_83_is_sub()
+Checking: TCH/F TS=0 SS=0
+Checking: TCH/F TS=1 SS=0
+Checking: TCH/F TS=2 SS=0
+Checking: TCH/F TS=3 SS=0
+Checking: TCH/F TS=4 SS=0
+Checking: TCH/F TS=5 SS=0
+Checking: TCH/F TS=6 SS=0
+Checking: TCH/H TS=0 SS=0
+Checking: TCH/H TS=1 SS=0
+Checking: TCH/H TS=2 SS=0
+Checking: TCH/H TS=3 SS=0
+Checking: TCH/H TS=4 SS=0
+Checking: TCH/H TS=5 SS=0
+Checking: TCH/H TS=6 SS=0
+Checking: TCH/H TS=0 SS=1
+Checking: TCH/H TS=1 SS=1
+Checking: TCH/H TS=2 SS=1
+Checking: TCH/H TS=3 SS=1
+Checking: TCH/H TS=4 SS=1
+Checking: TCH/H TS=5 SS=1
+Checking: TCH/H TS=6 SS=1
 Success