diff options
| author | Max <msuraev@sysmocom.de> | 2016-02-05 13:55:38 +0100 |
|---|---|---|
| committer | Holger Hans Peter Freyther <holger@moiji-mobile.com> | 2016-02-18 19:45:44 +0100 |
| commit | 5c18e26bc291766b0de22223abcf340bc48e3157 (patch) | |
| tree | 8177990abcaed45170179e5d1910f3e8b26e1213 /include | |
| parent | 0a59e9899f4dd4213dc72d535f0b9d5382dc7eb7 (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')
| -rw-r--r-- | include/Makefile.am | 1 | ||||
| -rw-r--r-- | include/osmocom/core/bitcomp.h | 42 |
2 files changed, 43 insertions, 0 deletions
diff --git a/include/Makefile.am b/include/Makefile.am index 07d6c00d..a965fb92 100644 --- a/include/Makefile.am +++ b/include/Makefile.am @@ -7,6 +7,7 @@ nobase_include_HEADERS = \ osmocom/core/bit64gen.h \ osmocom/core/bits.h \ osmocom/core/bitvec.h \ + osmocom/core/bitcomp.h \ osmocom/core/conv.h \ osmocom/core/crc16.h \ osmocom/core/crc16gen.h \ 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); + +/*! @} */ |