blocks: added gr::blocks::uchar_to_float

gr-blocks/grc/blocks_block_tree.xml

@@ -57,5 +57,6 @@
 		<block>blocks_interleaved_short_to_complex</block>
 		<block>blocks_short_to_char</block>
 		<block>blocks_short_to_float</block>
+		<block>blocks_uchar_to_float</block>
 	</cat>
 </cat>

gr-blocks/grc/blocks_uchar_to_float.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<!--
+###################################################
+##Unsigned Char to Float:
+###################################################
+ -->
+<block>
+	<name>UChar To Float</name>
+	<key>blocks_uchar_to_float</key>
+	<import>from gnuradio import blocks</import>
+	<make>blocks.uchar_to_float()</make>
+	<sink>
+		<name>in</name>
+		<type>byte</type>
+	</sink>
+	<source>
+		<name>out</name>
+		<type>float</type>
+	</source>
+</block>

gr-blocks/include/blocks/CMakeLists.txt

@@ -106,6 +106,7 @@ install(FILES
     multiply_const_ff.h
     short_to_char.h
     short_to_float.h
+    uchar_to_float.h
     DESTINATION ${GR_INCLUDE_DIR}/gnuradio/blocks
     COMPONENT "blocks_devel"
 )

gr-blocks/include/blocks/uchar_to_float.h

@@ -0,0 +1,49 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2012 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_BLOCKS_UCHAR_TO_FLOAT_H
+#define INCLUDED_BLOCKS_UCHAR_TO_FLOAT_H
+
+#include <blocks/api.h>
+#include <gr_sync_block.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief Convert stream of unsigned chars to a stream of floats
+     * \ingroup converter_blk
+     */
+    class BLOCKS_API uchar_to_float : virtual public gr_sync_block
+    {
+    public:
+
+      // gr::blocks::uchar_to_float_ff::sptr
+      typedef boost::shared_ptr<uchar_to_float> sptr;
+
+      static sptr make();
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_BLOCKS_UCHAR_TO_FLOAT_H */

gr-blocks/lib/CMakeLists.txt

@@ -143,6 +143,8 @@ list(APPEND gr_blocks_sources
     multiply_const_ff_impl.cc
     short_to_char_impl.cc
     short_to_float_impl.cc
+    uchar_array_to_float.cc
+    uchar_to_float_impl.cc
 )
 
 list(APPEND blocks_libs

gr-blocks/lib/uchar_array_to_float.cc

@@ -0,0 +1,40 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2012 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 <uchar_array_to_float.h>
+
+void
+uchar_array_to_float (const unsigned char *in, float *out, int nsamples)
+{
+  while (nsamples >= 4){
+    out[0] = in[0];
+    out[1] = in[1];
+    out[2] = in[2];
+    out[3] = in[3];
+    out += 4;
+    in += 4;
+    nsamples -= 4;
+  }
+
+  while (nsamples-- > 0)
+    *out++ = *in++;
+}

gr-blocks/lib/uchar_array_to_float.h

@@ -0,0 +1,34 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005, 2012 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_UCHAR_ARRAY_TO_FLOAT_H
+#define INCLUDED_UCHAR_ARRAY_TO_FLOAT_H
+
+#include <blocks/api.h>
+
+/*
+ * convert array of unsigned chars to floats
+ */
+BLOCKS_API void uchar_array_to_float (const unsigned char *in, float *out, int nsamples);
+
+
+#endif /* INCLUDED_UCHAR_ARRAY_TO_FLOAT_H */

gr-blocks/lib/uchar_to_float_impl.cc

@@ -0,0 +1,60 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2012 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 "uchar_to_float_impl.h"
+#include "uchar_array_to_float.h"
+#include <gr_io_signature.h>
+
+namespace gr {
+  namespace blocks {
+
+    uchar_to_float::sptr uchar_to_float::make()
+    {
+      return gnuradio::get_initial_sptr(new uchar_to_float_impl());
+    }
+
+    uchar_to_float_impl::uchar_to_float_impl()
+      : gr_sync_block("uchar_to_float",
+		      gr_make_io_signature (1, 1, sizeof(unsigned char)),
+		      gr_make_io_signature (1, 1, sizeof(float)))
+    {
+    }
+
+    int
+    uchar_to_float_impl::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];
+      float *out = (float *) output_items[0];
+
+      uchar_array_to_float (in, out, noutput_items);
+
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+}/* namespace gr */

gr-blocks/lib/uchar_to_float_impl.h

@@ -0,0 +1,45 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2012 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_UCHAR_TO_FLOAT_IMPL_H
+#define INCLUDED_UCHAR_TO_FLOAT_IMPL_H
+
+#include <blocks/uchar_to_float.h>
+
+namespace gr {
+  namespace blocks {
+
+    class BLOCKS_API uchar_to_float_impl : public uchar_to_float
+    {
+    public:
+      uchar_to_float_impl();
+
+      int work(int noutput_items,
+	       gr_vector_const_void_star &input_items,
+	       gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+
+#endif /* INCLUDED_UCHAR_TO_FLOAT_IMPL_H */

gr-blocks/python/qa_type_conversions.py

@@ -301,6 +301,16 @@ def test_short_to_float_scale(self):
         self.tb.run()
         self.assertEqual(expected_data, dst.data())
 
+    def test_uchar_to_float(self):
+        src_data = (1, 2, 3, 4, 5)
+        expected_data = (1.0, 2.0, 3.0, 4.0, 5.0)
+        src = gr.vector_source_b(src_data)
+        op = blocks_swig.uchar_to_float()
+        dst = gr.vector_sink_f()
+        self.tb.connect(src, op, dst)
+        self.tb.run()
+        self.assertEqual(expected_data, dst.data())
+
 
 if __name__ == '__main__':
     gr_unittest.run(test_type_conversions, "test_type_conversions.xml")

gr-blocks/swig/blocks_swig.i

@@ -78,6 +78,7 @@
 #include "blocks/sub_ss.h"
 #include "blocks/sub_ii.h"
 #include "blocks/sub_cc.h"
+#include "blocks/uchar_to_float.h"
 %}
 
 %include "blocks/add_ff.h"
@@ -130,6 +131,7 @@
 %include "blocks/sub_ss.h"
 %include "blocks/sub_ii.h"
 %include "blocks/sub_cc.h"
+%include "blocks/uchar_to_float.h"
 
 GR_SWIG_BLOCK_MAGIC2(blocks, add_ff);
 GR_SWIG_BLOCK_MAGIC2(blocks, add_ss);
@@ -181,3 +183,4 @@ GR_SWIG_BLOCK_MAGIC2(blocks, sub_ff);
 GR_SWIG_BLOCK_MAGIC2(blocks, sub_ss);
 GR_SWIG_BLOCK_MAGIC2(blocks, sub_ii);
 GR_SWIG_BLOCK_MAGIC2(blocks, sub_cc);
+GR_SWIG_BLOCK_MAGIC2(blocks, uchar_to_float);