>From 31179ebdef99eefa976bc65780d27870a9f15f6c Mon Sep 17 00:00:00 2001 From: =?utf-8?q?Stefan=20Br=C3=BCns?= Date: Wed, 16 Dec 2009 18:32:53 +0100 Subject: [PATCH] Add galois lfsr (de-)scrambler - add next_bit_(de-)scramble method to glfsr class, same signature as lfsr class - add gnuradio blocks and test cases --- gnuradio-core/src/lib/general/Makefile.am | 9 +- gnuradio-core/src/lib/general/general.i | 4 + .../src/lib/general/gr_descrambler2_bb.cc | 56 ++++++++ gnuradio-core/src/lib/general/gr_descrambler2_bb.h | 59 +++++++++ gnuradio-core/src/lib/general/gr_descrambler2_bb.i | 31 +++++ gnuradio-core/src/lib/general/gr_scrambler2_bb.cc | 56 ++++++++ gnuradio-core/src/lib/general/gr_scrambler2_bb.h | 59 +++++++++ gnuradio-core/src/lib/general/gr_scrambler2_bb.i | 31 +++++ gnuradio-core/src/lib/general/gri_glfsr.h | 19 +++ gnuradio-core/src/lib/general/qa_general.cc | 2 + gnuradio-core/src/lib/general/qa_gri_glfsr.cc | 136 ++++++++++++++++++++ gnuradio-core/src/lib/general/qa_gri_glfsr.h | 42 ++++++ 12 files changed, 503 insertions(+), 1 deletions(-) create mode 100644 gnuradio-core/src/lib/general/gr_descrambler2_bb.cc create mode 100644 gnuradio-core/src/lib/general/gr_descrambler2_bb.h create mode 100644 gnuradio-core/src/lib/general/gr_descrambler2_bb.i create mode 100644 gnuradio-core/src/lib/general/gr_scrambler2_bb.cc create mode 100644 gnuradio-core/src/lib/general/gr_scrambler2_bb.h create mode 100644 gnuradio-core/src/lib/general/gr_scrambler2_bb.i create mode 100644 gnuradio-core/src/lib/general/qa_gri_glfsr.cc create mode 100644 gnuradio-core/src/lib/general/qa_gri_glfsr.h diff --git a/gnuradio-core/src/lib/general/Makefile.am b/gnuradio-core/src/lib/general/Makefile.am index ff188f7..0ec82f5 100644 --- a/gnuradio-core/src/lib/general/Makefile.am +++ b/gnuradio-core/src/lib/general/Makefile.am @@ -171,7 +171,9 @@ libgeneral_la_SOURCES = \ malloc16.c \ gr_unpack_k_bits_bb.cc \ gr_descrambler_bb.cc \ + gr_descrambler2_bb.cc \ gr_scrambler_bb.cc \ + gr_scrambler2_bb.cc \ gr_probe_mpsk_snr_c.cc \ gr_probe_density_b.cc @@ -183,7 +185,8 @@ libgeneral_qa_la_SOURCES = \ qa_gr_fxpt_nco.cc \ qa_gr_fxpt_vco.cc \ qa_gr_math.cc \ - qa_gri_lfsr.cc + qa_gri_lfsr.cc \ + qa_gri_glfsr.cc grinclude_HEADERS = \ gr_agc_cc.h \ @@ -338,7 +341,9 @@ grinclude_HEADERS = \ random.h \ gr_unpack_k_bits_bb.h \ gr_descrambler_bb.h \ + gr_descrambler2_bb.h \ gr_scrambler_bb.h \ + gr_scrambler2_bb.h \ gr_probe_mpsk_snr_c.h \ gr_probe_density_b.h @@ -475,6 +480,8 @@ swiginclude_HEADERS = \ gri_agc2_cc.i \ gri_agc2_ff.i \ gr_descrambler_bb.i \ + gr_descrambler2_bb.i \ gr_scrambler_bb.i \ + gr_scrambler2_bb.i \ gr_probe_mpsk_snr_c.i \ gr_probe_density_b.i diff --git a/gnuradio-core/src/lib/general/general.i b/gnuradio-core/src/lib/general/general.i index 0684e63..d13bd92 100644 --- a/gnuradio-core/src/lib/general/general.i +++ b/gnuradio-core/src/lib/general/general.i @@ -131,7 +131,9 @@ #include #include #include +#include #include +#include #include #include #include @@ -251,7 +253,9 @@ %include "gr_encode_ccsds_27_bb.i" %include "gr_decode_ccsds_27_fb.i" %include "gr_descrambler_bb.i" +%include "gr_descrambler2_bb.i" %include "gr_scrambler_bb.i" +%include "gr_scrambler2_bb.i" %include "gr_probe_mpsk_snr_c.i" %include "gr_probe_density_b.i" %include "gr_rail_ff.i" diff --git a/gnuradio-core/src/lib/general/gr_descrambler2_bb.cc b/gnuradio-core/src/lib/general/gr_descrambler2_bb.cc new file mode 100644 index 0000000..d0e3f1f --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_descrambler2_bb.cc @@ -0,0 +1,56 @@ +/* -*- c++ -*- */ +/* + * Copyright 2008 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include +#include + +gr_descrambler2_bb_sptr +gr_make_descrambler2_bb(int mask, int seed, int len) +{ + return gr_descrambler2_bb_sptr(new gr_descrambler2_bb(mask, seed, len)); +} + +gr_descrambler2_bb::gr_descrambler2_bb(int mask, int seed, int len) + : gr_sync_block("descrambler2_bb", + gr_make_io_signature (1, 1, sizeof (unsigned char)), + gr_make_io_signature (1, 1, sizeof (unsigned char))), + d_lfsr(mask, seed) +{ +} + +int +gr_descrambler2_bb::work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + const unsigned char *in = (const unsigned char *) input_items[0]; + unsigned char *out = (unsigned char *) output_items[0]; + + for (int i = 0; i < noutput_items; i++) + out[i] = d_lfsr.next_bit_descramble(in[i]); + + return noutput_items; +} diff --git a/gnuradio-core/src/lib/general/gr_descrambler2_bb.h b/gnuradio-core/src/lib/general/gr_descrambler2_bb.h new file mode 100644 index 0000000..18c06c6 --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_descrambler2_bb.h @@ -0,0 +1,59 @@ +/* -*- c++ -*- */ +/* + * Copyright 2008 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. + */ +#ifndef INCLUDED_GR_DESCRAMBLER2_BB_H +#define INCLUDED_GR_DESCRAMBLER2_BB_H + +#include +#include "gri_glfsr.h" + +class gr_descrambler2_bb; +typedef boost::shared_ptr gr_descrambler2_bb_sptr; + +gr_descrambler2_bb_sptr gr_make_descrambler2_bb(int mask, int seed, int len); + +/*! + * Descramble an input stream using an LFSR. This block works on the LSB only + * of the input data stream, i.e., on an "unpacked binary" stream, and + * produces the same format on its output. + * + * \param mask Polynomial mask for LFSR + * \param seed Initial shift register contents + * \param len Shift register length + * + * \ingroup misc + */ + +class gr_descrambler2_bb : public gr_sync_block +{ + friend gr_descrambler2_bb_sptr gr_make_descrambler2_bb(int mask, int seed, int len); + + gri_glfsr d_lfsr; + + gr_descrambler2_bb(int mask, int seed, int len); + +public: + int work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif /* INCLUDED_GR_DESCRAMBLER2_BB_H */ diff --git a/gnuradio-core/src/lib/general/gr_descrambler2_bb.i b/gnuradio-core/src/lib/general/gr_descrambler2_bb.i new file mode 100644 index 0000000..3b500e4 --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_descrambler2_bb.i @@ -0,0 +1,31 @@ +/* -*- c++ -*- */ +/* + * Copyright 2008 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. + */ + +GR_SWIG_BLOCK_MAGIC(gr,descrambler2_bb); + +gr_descrambler2_bb_sptr gr_make_descrambler2_bb(int mask, int seed, int len); + +class gr_descrambler2_bb : public gr_sync_block +{ +private: + gr_descrambler2_bb(int mask, int seed, int len); +}; diff --git a/gnuradio-core/src/lib/general/gr_scrambler2_bb.cc b/gnuradio-core/src/lib/general/gr_scrambler2_bb.cc new file mode 100644 index 0000000..c874f5e --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_scrambler2_bb.cc @@ -0,0 +1,56 @@ +/* -*- c++ -*- */ +/* + * Copyright 2008 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include +#include + +gr_scrambler2_bb_sptr +gr_make_scrambler2_bb(int mask, int seed, int len) +{ + return gr_scrambler2_bb_sptr(new gr_scrambler2_bb(mask, seed, len)); +} + +gr_scrambler2_bb::gr_scrambler2_bb(int mask, int seed, int len) + : gr_sync_block("scrambler2_bb", + gr_make_io_signature (1, 1, sizeof (unsigned char)), + gr_make_io_signature (1, 1, sizeof (unsigned char))), + d_lfsr(mask, seed) +{ +} + +int +gr_scrambler2_bb::work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + const unsigned char *in = (const unsigned char *) input_items[0]; + unsigned char *out = (unsigned char *) output_items[0]; + + for (int i = 0; i < noutput_items; i++) + out[i] = d_lfsr.next_bit_scramble(in[i]); + + return noutput_items; +} diff --git a/gnuradio-core/src/lib/general/gr_scrambler2_bb.h b/gnuradio-core/src/lib/general/gr_scrambler2_bb.h new file mode 100644 index 0000000..a2e294a --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_scrambler2_bb.h @@ -0,0 +1,59 @@ +/* -*- c++ -*- */ +/* + * Copyright 2008 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. + */ +#ifndef INCLUDED_GR_SCRAMBLER2_BB_H +#define INCLUDED_GR_SCRAMBLER2_BB_H + +#include +#include "gri_glfsr.h" + +class gr_scrambler2_bb; +typedef boost::shared_ptr gr_scrambler2_bb_sptr; + +gr_scrambler2_bb_sptr gr_make_scrambler2_bb(int mask, int seed, int len); + +/*! + * Scramble an input stream using an LFSR. This block works on the LSB only + * of the input data stream, i.e., on an "unpacked binary" stream, and + * produces the same format on its output. + * + * \param mask Polynomial mask for LFSR + * \param seed Initial shift register contents + * \param len Shift register length + * + * \ingroup misc + */ + +class gr_scrambler2_bb : public gr_sync_block +{ + friend gr_scrambler2_bb_sptr gr_make_scrambler2_bb(int mask, int seed, int len); + + gri_glfsr d_lfsr; + + gr_scrambler2_bb(int mask, int seed, int len); + +public: + int work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif /* INCLUDED_GR_SCRAMBLER2_BB_H */ diff --git a/gnuradio-core/src/lib/general/gr_scrambler2_bb.i b/gnuradio-core/src/lib/general/gr_scrambler2_bb.i new file mode 100644 index 0000000..861d410 --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_scrambler2_bb.i @@ -0,0 +1,31 @@ +/* -*- c++ -*- */ +/* + * Copyright 2008 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. + */ + +GR_SWIG_BLOCK_MAGIC(gr,scrambler2_bb); + +gr_scrambler2_bb_sptr gr_make_scrambler2_bb(int mask, int seed, int len); + +class gr_scrambler2_bb : public gr_sync_block +{ +private: + gr_scrambler2_bb(int mask, int seed, int len); +}; diff --git a/gnuradio-core/src/lib/general/gri_glfsr.h b/gnuradio-core/src/lib/general/gri_glfsr.h index 7dd5f86..eb09515 100644 --- a/gnuradio-core/src/lib/general/gri_glfsr.h +++ b/gnuradio-core/src/lib/general/gri_glfsr.h @@ -49,7 +49,26 @@ class gri_glfsr return bit; } + unsigned char next_bit_scramble(unsigned char input) { + unsigned char bit = (input ^ d_shift_register) & 1; + d_shift_register >>= 1; + if (bit) + d_shift_register ^= d_mask; + return bit; + } + + unsigned char next_bit_descramble(unsigned char input) { + unsigned char bit; + bit = (input ^ d_shift_register) & 1; + d_shift_register >>= 1; + if (input & 1) + d_shift_register ^= d_mask; + return bit; + } + int mask() const { return d_mask; } + + void set_seed(int seed) { d_shift_register = seed; } }; #endif /* INCLUDED_GRI_GLFSR_H */ diff --git a/gnuradio-core/src/lib/general/qa_general.cc b/gnuradio-core/src/lib/general/qa_general.cc index 6984d79..8bf6003 100644 --- a/gnuradio-core/src/lib/general/qa_general.cc +++ b/gnuradio-core/src/lib/general/qa_general.cc @@ -33,6 +33,7 @@ #include #include #include +#include CppUnit::TestSuite * qa_general::suite () @@ -46,6 +47,7 @@ qa_general::suite () s->addTest (qa_gr_fxpt_vco::suite ()); s->addTest (qa_gr_math::suite ()); s->addTest (qa_gri_lfsr::suite ()); + s->addTest (qa_gri_glfsr::suite ()); return s; } diff --git a/gnuradio-core/src/lib/general/qa_gri_glfsr.cc b/gnuradio-core/src/lib/general/qa_gri_glfsr.cc new file mode 100644 index 0000000..3e9f1bd --- /dev/null +++ b/gnuradio-core/src/lib/general/qa_gri_glfsr.cc @@ -0,0 +1,136 @@ +/* + * Copyright 2008 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. + */ + +#include +#include +#include +#include +#include + +void +qa_gri_glfsr::test_lfsr () +{ + int mask = 0x12; + int seed = 0x01; + + gri_glfsr lfsr1(mask,seed); + gri_glfsr lfsr2(mask,seed); + + unsigned char expected[] = {0, 0, 0, 1, 1, 1, 1, 1, 0, 0}; + + for(unsigned int i=0; i<31; i++){ + lfsr1.next_bit(); + } + + // test that after one lfsr cycle we still match out uncycled lfsr + for (unsigned int i = 0; i < 41; i++) { + CPPUNIT_ASSERT_EQUAL((int) lfsr1.next_bit(), (int) lfsr2.next_bit()); + } + + // test the known correct values at the given shift offset + for(unsigned int i=0; i<10; i++){ + CPPUNIT_ASSERT_EQUAL((int) lfsr1.next_bit(), (int) expected[i]); + } +} + +void +qa_gri_glfsr::test_scrambler() +{ + // CCSDS 7-bit scrambler + int mask = 0xC5; + int seed = 0x00; + + gri_glfsr scrambler(mask, seed); + + // Impulse (1 and 126 more zeroes) + unsigned char src[] = + { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0 }; // flush bits + + // Impulse response (including leading bits) + unsigned char expected[] = + { 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, + 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 0, + 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, + 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, + 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, + 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, + 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, + 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, + 0, 0, 1, 1, 0, 0 }; + + int len = sizeof(src); + unsigned char actual[len]; + + for (int i = 0; i < len; i++) + actual[i] = scrambler.next_bit_scramble(src[i]); + + CPPUNIT_ASSERT(memcmp(expected, actual, len) == 0); +} + +void +qa_gri_glfsr::test_descrambler() +{ + // CCSDS 7-bit scrambler + int mask = 0xC5; + int seed = 0x00; + + gri_glfsr descrambler(mask, seed); + + // Scrambled sequence (impulse response) + unsigned char src[] = + { 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, + 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 0, + 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, + 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, + 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, + 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, + 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, + 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, + 0, 0, 1, 1, 0, 0 }; + + // Original (impulse) + unsigned char expected[] = + { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0 }; + + int len = sizeof(src); + unsigned char actual[len]; + + for (int i = 0; i < len; i++) + actual[i] = descrambler.next_bit_descramble(src[i]); + + CPPUNIT_ASSERT(memcmp(expected, actual, len) == 0); +} diff --git a/gnuradio-core/src/lib/general/qa_gri_glfsr.h b/gnuradio-core/src/lib/general/qa_gri_glfsr.h new file mode 100644 index 0000000..9912d46 --- /dev/null +++ b/gnuradio-core/src/lib/general/qa_gri_glfsr.h @@ -0,0 +1,42 @@ +/* -*- c++ -*- */ +/* + * Copyright 2008 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. + */ +#ifndef _QA_GRI_GLFSR_H_ +#define _QA_GRI_GLFSR_H_ + +#include +#include + +class qa_gri_glfsr : public CppUnit::TestCase { + + CPPUNIT_TEST_SUITE(qa_gri_glfsr); + CPPUNIT_TEST(test_lfsr); + CPPUNIT_TEST(test_scrambler); + CPPUNIT_TEST(test_descrambler); + CPPUNIT_TEST_SUITE_END(); + + private: + void test_lfsr(); + void test_scrambler(); + void test_descrambler(); +}; + +#endif /* _QA_GRI_GLFSR_H_ */ -- 1.5.6