1 files changed, 71 insertions, 0 deletions
diff --git a/src/PrbsGenerator.h b/src/PrbsGenerator.h
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+++ b/src/PrbsGenerator.h
@@ -0,0 +1,71 @@
+/*
+   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Her Majesty
+   the Queen in Right of Canada (Communications Research Center Canada)
+ */
+/*
+   This file is part of CRC-DADMOD.
+
+   CRC-DADMOD 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 of the
+   License, or (at your option) any later version.
+
+   CRC-DADMOD 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 CRC-DADMOD.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PRBS_GENERATOR_H
+#define PRBS_GENERATOR_H
+
+#ifdef HAVE_CONFIG_H
+#   include <config.h>
+#endif
+
+
+#include "ModCodec.h"
+
+#include <sys/types.h>
+#include <stdint.h>
+
+
+class PrbsGenerator : public ModCodec
+{
+private:
+
+protected:
+    uint32_t parity_check(uint32_t prbs_accum);
+    void gen_prbs_table();
+    uint32_t update_prbs();
+    void gen_weight_table();
+    
+    size_t d_framesize;
+    // table of matrix products used to update a 32-bit PRBS generator
+    uint32_t d_prbs_table [4][256];
+    // table of weights for 8-bit bytes
+    unsigned char d_weight[256];
+    // PRBS polynomial generator
+    uint32_t d_polynomial;
+    // PRBS generator polarity mask
+    unsigned char d_polarity_mask;
+    // PRBS accumulator
+    uint32_t d_accum;
+    uint32_t d_accum_init;
+    // Initialization size
+    size_t d_init;
+
+public:
+    PrbsGenerator(size_t framesize, uint32_t polynomial, uint32_t accum = 0,
+            size_t init = 0);
+    virtual ~PrbsGenerator();
+
+    int process(Buffer* const dataIn, Buffer* dataOut);
+    const char* name() { return "PrbsGenerator"; }
+};
+
+
+#endif // PRBS_GENERATOR_H