Update MCS selection for retransmission
In 3GPP TS 44.060 the selection of MCS for retransmissions is defined as
separate tables (8.1.1.1 and 8.1.1.2) depending on the value of
resegmentation bit (which is opposite to the way EGPRS_ARQ are defined
in the source code). Let's follow the same idea and explicitly check for
resegmentation bit value and use separate tables. This also makes it
easier to add proper support for special cases (MCS-6-9 and MCS-5-7) and
padding in future independently for different ARQ types. The code is
also moved to c to avoid unnecessary conversions to and from cpp class.
Change-Id: Ia73baeefee7a58834f0fc50e3b8bf8d5e3eb7815
diff --git a/src/coding_scheme.h b/src/coding_scheme.h
index aac4bba..24db86d 100644
--- a/src/coding_scheme.h
+++ b/src/coding_scheme.h
@@ -32,6 +32,7 @@
extern const struct value_string mcs_names[];
const char *mcs_name(enum CodingScheme val);
+enum CodingScheme get_retx_mcs(enum CodingScheme initial_mcs, enum CodingScheme commanded_mcs, bool resegment_bit);
bool mcs_is_gprs(enum CodingScheme cs);
bool mcs_is_edge(enum CodingScheme cs);