- added Bit Packer

git-svn-id: http://moon:8086/svn/software/trunk/projects/GnuRadio@423 b431acfa-c32f-4a4a-93f1-934dc6c82436
2019-02-10 15:55:43 +00:00
parent e7e3babb50
commit 28681c4973
4 changed files with 295 additions and 0 deletions
@@ -0,0 +1,134 @@
+/* -*- c++ -*- */
+/* 
+ * Copyright 2019 Jay Arrowfield.
+ * 
+ * This 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.
+ * 
+ * This software 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 software; 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 <gnuradio/io_signature.h>
+#include "bit_packer_impl.h"
+
+namespace gr {
+namespace jay {
+
+bit_packer::sptr
+bit_packer::make(int numBitsIn, int numBitsOut, int endianess)
+{
+	return gnuradio::get_initial_sptr
+	(new bit_packer_impl(numBitsIn, numBitsOut, endianess));
+}
+
+/*
+ * The private constructor
+ */
+bit_packer_impl::bit_packer_impl(int numBitsIn, int numBitsOut, int endianess)
+: gr::block("bit_packer"
+, gr::io_signature::make(1, 1, sizeof(int))
+, gr::io_signature::make(1, 1, sizeof(int)))
+, m_inputCounter(0)
+, m_outputCounter(0)
+, m_numBitsIn(numBitsIn)
+, m_numBitsOut(numBitsOut)
+, m_endianess(endianess)
+{}
+
+/*
+ * Our virtual destructor.
+ */
+bit_packer_impl::~bit_packer_impl()
+{
+}
+
+void
+bit_packer_impl::forecast (int noutput_items, gr_vector_int &ninput_items_required)
+{
+	/* <+forecast+> e.g. ninput_items_required[0] = noutput_items */
+	ninput_items_required[0] = m_numBitsIn*noutput_items;
+}
+
+int
+bit_packer_impl::general_work (int noutput_items,
+				   gr_vector_int &ninput_items,
+				   gr_vector_const_void_star &input_items,
+				   gr_vector_void_star &output_items)
+{
+	const int *in = (const int *) input_items[0];
+	int *out = (int *) output_items[0];
+
+	// Do <+signal processing+>
+	size_t i = 0;
+	size_t j = 0;
+	for (i=0; i < ninput_items[0]; i++)
+	{
+		if (in[i] == 0xFF)
+		{
+			m_inputCounter = 0;
+			m_outputCounter = 0;
+		}
+		else
+		{
+			if (m_endianess == 0)
+			{
+				if(m_inputCounter == m_numBitsIn)
+				{
+					m_output <<= (m_numBitsOut - m_outputCounter);
+					out[j++] = m_output;
+					m_output = 0;
+					m_inputCounter = 0;
+					m_outputCounter = 0;
+				}
+				m_output <<= 1;
+				if (in[i] != 0)
+				{
+					m_output |= 1;
+				}
+			}
+			else
+			{
+				if(m_inputCounter == m_numBitsIn)
+				{
+					m_output >>= (m_numBitsOut - m_outputCounter);
+					out[j++] = m_output;
+					m_output = 0;
+					m_inputCounter = 0;
+					m_outputCounter = 0;
+				}
+				m_output >>= 1;
+				if (in[i] != 0)
+				{
+					m_output |= 1 << (m_numBitsOut-1);
+				}
+			}
+			m_inputCounter++;
+			m_outputCounter++;
+		}
+	}
+		
+	// Tell runtime system how many input items we consumed on
+	// each input stream.
+	consume_each (i);
+
+	// Tell runtime system how many output items we produced.
+	return j;
+}
+
+} /* namespace jay */
+} /* namespace gr */
+
@@ -0,0 +1,57 @@
+/* -*- c++ -*- */
+/* 
+ * Copyright 2019 Jay Arrowfield.
+ * 
+ * This 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.
+ * 
+ * This software 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 software; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_JAY_BIT_PACKER_IMPL_H
+#define INCLUDED_JAY_BIT_PACKER_IMPL_H
+
+#include <jay/bit_packer.h>
+
+namespace gr {
+  namespace jay {
+
+    class bit_packer_impl : public bit_packer
+    {
+     private:
+      // Nothing to declare in this block.
+	int m_inputCounter;
+	int m_outputCounter;
+	int m_numBitsIn;
+	int m_numBitsOut;
+	int m_endianess;
+	int m_output;
+	
+     public:
+      bit_packer_impl(int numBitsIn, int numBitsOut, int endianess);
+      ~bit_packer_impl();
+
+      // Where all the action really happens
+      void forecast (int noutput_items, gr_vector_int &ninput_items_required);
+
+      int general_work(int noutput_items,
+           gr_vector_int &ninput_items,
+           gr_vector_const_void_star &input_items,
+           gr_vector_void_star &output_items);
+    };
+
+  } // namespace jay
+} // namespace gr
+
+#endif /* INCLUDED_JAY_BIT_PACKER_IMPL_H */
+