diff options
Diffstat (limited to 'gnuradio-core/src/lib/viterbi')
| -rw-r--r-- | gnuradio-core/src/lib/viterbi/CMakeLists.txt | 63 | ||||
| -rw-r--r-- | gnuradio-core/src/lib/viterbi/Makefile.am | 2 | ||||
| -rw-r--r-- | gnuradio-core/src/lib/viterbi/metrics.c | 3 | ||||
| -rw-r--r-- | gnuradio-core/src/lib/viterbi/viterbi.h | 14 |
4 files changed, 77 insertions, 5 deletions
diff --git a/gnuradio-core/src/lib/viterbi/CMakeLists.txt b/gnuradio-core/src/lib/viterbi/CMakeLists.txt new file mode 100644 index 000000000..add5c77e8 --- /dev/null +++ b/gnuradio-core/src/lib/viterbi/CMakeLists.txt @@ -0,0 +1,63 @@ +# Copyright 2010-2011 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio 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 3, or (at your option) +# any later version. +# +# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. + +######################################################################## +# This file included, use CMake directory variables +######################################################################## + +set(viterbi_sources + ${CMAKE_CURRENT_SOURCE_DIR}/metrics.c + ${CMAKE_CURRENT_SOURCE_DIR}/tab.c + ${CMAKE_CURRENT_SOURCE_DIR}/viterbi.c +) + +######################################################################## +# define missing erf function with C linkage (hack for metrics.c) +######################################################################## +if(MSVC) +file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/boost_math_erf.cc " +#include <boost/math/special_functions/erf.hpp> +extern \"C\" double erf(double x){ + return boost::math::erf(x); +} +") +list(APPEND viterbi_sources ${CMAKE_CURRENT_BINARY_DIR}/boost_math_erf.cc) +endif(MSVC) + +######################################################################## +# Append gnuradio-core library sources +######################################################################## +list(APPEND gnuradio_core_sources ${viterbi_sources}) + +######################################################################## +# Install runtime headers +######################################################################## +install( + FILES ${CMAKE_CURRENT_SOURCE_DIR}/viterbi.h + DESTINATION ${GR_INCLUDE_DIR}/gnuradio + COMPONENT "core_devel" +) + +######################################################################## +# Create some text executables (not registered tests) +# Its not much to build so the sources are just re-listed, +# rather than create a new library just for these two apps. +######################################################################## +#ADD_EXECUTABLE(viterbi_encode ${CMAKE_CURRENT_SOURCE_DIR}/encode.cc ${viterbi_sources}) +#ADD_EXECUTABLE(viterbi_decode ${CMAKE_CURRENT_SOURCE_DIR}/decode.cc ${viterbi_sources}) diff --git a/gnuradio-core/src/lib/viterbi/Makefile.am b/gnuradio-core/src/lib/viterbi/Makefile.am index 8384c52f0..1b86a86f8 100644 --- a/gnuradio-core/src/lib/viterbi/Makefile.am +++ b/gnuradio-core/src/lib/viterbi/Makefile.am @@ -21,6 +21,8 @@ include $(top_srcdir)/Makefile.common LIBS = -lm +AM_CPPFLAGS = -I$(top_srcdir)/gnuradio-core/src/lib/general + noinst_LTLIBRARIES = libviterbi.la libviterbi_la_SOURCES = \ diff --git a/gnuradio-core/src/lib/viterbi/metrics.c b/gnuradio-core/src/lib/viterbi/metrics.c index 9f958cab7..77c6a63c8 100644 --- a/gnuradio-core/src/lib/viterbi/metrics.c +++ b/gnuradio-core/src/lib/viterbi/metrics.c @@ -42,6 +42,9 @@ #include <stdlib.h> #include <math.h> +//declare erf in case it was missing in math.h and provided for by the build system +extern double erf(double x); + /* Normal function integrated from -Inf to x. Range: 0-1 */ #define normal(x) (0.5 + 0.5*erf((x)/M_SQRT2)) diff --git a/gnuradio-core/src/lib/viterbi/viterbi.h b/gnuradio-core/src/lib/viterbi/viterbi.h index 155b0d93a..5bb8b357a 100644 --- a/gnuradio-core/src/lib/viterbi/viterbi.h +++ b/gnuradio-core/src/lib/viterbi/viterbi.h @@ -23,27 +23,31 @@ * than we'd like for K=7, especially since we chain back every 8 bits. * But it fits so nicely into a 32-bit machine word... */ -struct viterbi_state { + +#include <gr_core_api.h> + +struct GR_CORE_API viterbi_state { unsigned long path; /* Decoded path to this state */ long metric; /* Cumulative metric to this state */ }; +GR_CORE_API int gen_met(int mettab[2][256], /* Metric table */ int amp, /* Signal amplitude */ double esn0, /* Es/N0 ratio in dB */ double bias, /* Metric bias */ int scale); /* Scale factor */ -unsigned char +GR_CORE_API unsigned char encode(unsigned char *symbols, unsigned char *data, unsigned int nbytes,unsigned char encstate); -void +GR_CORE_API void viterbi_chunks_init(struct viterbi_state* state); -void + GR_CORE_API void viterbi_butterfly2(unsigned char *symbols, int mettab[2][256], struct viterbi_state *state0, struct viterbi_state *state1); -unsigned char +GR_CORE_API unsigned char viterbi_get_output(struct viterbi_state *state, unsigned char *outbuf); |