move openbsc/* to repos root

This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7

1 files changed, 115 insertions, 0 deletions

diff --git a/src/libbsc/meas_rep.c b/src/libbsc/meas_rep.c
new file mode 100644
index 000000000..808103d28
--- /dev/null
+++ b/src/libbsc/meas_rep.c
@@ -0,0 +1,115 @@
+/* Measurement Report Processing */
+
+/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ *
+ * 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 Affero 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/meas_rep.h>
+
+static int get_field(const struct gsm_meas_rep *rep,
+		     enum meas_rep_field field)
+{
+	switch (field) {
+	case MEAS_REP_DL_RXLEV_FULL:
+		return rep->dl.full.rx_lev;
+	case MEAS_REP_DL_RXLEV_SUB:
+		return rep->dl.sub.rx_lev;
+	case MEAS_REP_DL_RXQUAL_FULL:
+		return rep->dl.full.rx_qual;
+	case MEAS_REP_DL_RXQUAL_SUB:
+		return rep->dl.sub.rx_qual;
+	case MEAS_REP_UL_RXLEV_FULL:
+		return rep->ul.full.rx_lev;
+	case MEAS_REP_UL_RXLEV_SUB:
+		return rep->ul.sub.rx_lev;
+	case MEAS_REP_UL_RXQUAL_FULL:
+		return rep->ul.full.rx_qual;
+	case MEAS_REP_UL_RXQUAL_SUB:
+		return rep->ul.sub.rx_qual;
+	}
+
+	return 0;
+}
+
+
+unsigned int calc_initial_idx(unsigned int array_size,
+			      unsigned int meas_rep_idx,
+			      unsigned int num_values)
+{
+	int offs, idx;
+
+	/* from which element do we need to start if we're interested
+	 * in an average of 'num' elements */
+	offs = meas_rep_idx - num_values;
+
+	if (offs < 0)
+		idx = array_size + offs;
+	else
+		idx = offs;
+
+	return idx;
+}
+
+/* obtain an average over the last 'num' fields in the meas reps */
+int get_meas_rep_avg(const struct gsm_lchan *lchan,
+		     enum meas_rep_field field, unsigned int num)
+{
+	unsigned int i, idx;
+	int avg = 0;
+
+	if (num < 1)
+		return 0;
+
+	idx = calc_initial_idx(ARRAY_SIZE(lchan->meas_rep),
+				lchan->meas_rep_idx, num);
+
+	for (i = 0; i < num; i++) {
+		int j = (idx+i) % ARRAY_SIZE(lchan->meas_rep);
+
+		avg += get_field(&lchan->meas_rep[j], field);
+	}
+
+	return avg / num;
+}
+
+/* Check if N out of M last values for FIELD are >= bd */
+int meas_rep_n_out_of_m_be(const struct gsm_lchan *lchan,
+			enum meas_rep_field field,
+			unsigned int n, unsigned int m, int be)
+{
+	unsigned int i, idx;
+	int count = 0;
+
+	idx = calc_initial_idx(ARRAY_SIZE(lchan->meas_rep),
+				lchan->meas_rep_idx, m);
+
+	for (i = 0; i < m; i++) {
+		int j = (idx + i) % ARRAY_SIZE(lchan->meas_rep);
+		int val = get_field(&lchan->meas_rep[j], field);
+
+		if (val >= be)
+			count++;
+
+		if (count >= n)
+			return 1;
+	}
+
+	return 0;
+}