summaryrefslogtreecommitdiffstats
path: root/include/osmocom/core/bitcomp.h
diff options
context:
space:
mode:
authorMax <msuraev@sysmocom.de>2016-02-05 13:55:38 +0100
committerHolger Hans Peter Freyther <holger@moiji-mobile.com>2016-02-18 19:45:44 +0100
commit5c18e26bc291766b0de22223abcf340bc48e3157 (patch)
tree8177990abcaed45170179e5d1910f3e8b26e1213 /include/osmocom/core/bitcomp.h
parent0a59e9899f4dd4213dc72d535f0b9d5382dc7eb7 (diff)
Add T4 bit map compression routines
Add bit map encoder and decoder functions: decoder is fully functional while encoder is good enough for testing - no backtracking to find the best possible compression is implemented. If somebody is willing to implement MS side of EDGE than this has to be expanded. Add corresponding tests. N. B: the encoding is implemented according to ETSI TS 44.060 which is slightly different from T4 used for fax according to CCITT G31D (RFC 804). Ticket: OW#2407 Sponsored-by: On-Waves ehf Signed-off-by: Max <msuraev@sysmocom.de>
Diffstat (limited to 'include/osmocom/core/bitcomp.h')
-rw-r--r--include/osmocom/core/bitcomp.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/include/osmocom/core/bitcomp.h b/include/osmocom/core/bitcomp.h
new file mode 100644
index 00000000..89eccbce
--- /dev/null
+++ b/include/osmocom/core/bitcomp.h
@@ -0,0 +1,42 @@
+#pragma once
+
+/* bit compression routines */
+
+/* (C) 2016 sysmocom s.f.m.c. GmbH by Max Suraev <msuraev@sysmocom.de>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 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.
+ *
+ */
+
+/*! \defgroup bitcomp Bit compression
+ * @{
+ */
+
+/*! \file bitcomp.h
+ * \brief Osmocom bit compression routines
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <osmocom/core/bitvec.h>
+
+
+int osmo_t4_encode(struct bitvec *bv);
+int osmo_t4_decode(const struct bitvec *in, bool cc, struct bitvec *out);
+
+/*! @} */