blocks: added gr::blocks::short_to_float

gr-blocks/grc/blocks_block_tree.xml

@@ -56,5 +56,6 @@
 		<block>blocks_int_to_float</block>
 		<block>blocks_interleaved_short_to_complex</block>
 		<block>blocks_short_to_char</block>
+		<block>blocks_short_to_float</block>
 	</cat>
 </cat>

gr-blocks/grc/blocks_short_to_float.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0"?>
+<!--
+###################################################
+##Short to Float:
+###################################################
+ -->
+<block>
+	<name>Short To Float</name>
+	<key>blocks_short_to_float</key>
+	<import>from gnuradio import blocks</import>
+	<make>blocks.short_to_float($vlen, $scale)</make>
+	<callback>set_scale($scale)</callback>
+	<param>
+		<name>Vec Length</name>
+		<key>vlen</key>
+		<value>1</value>
+		<type>int</type>
+	</param>
+	<param>
+		<name>Scale</name>
+		<key>scale</key>
+		<value>1</value>
+		<type>real</type>
+	</param>
+	<sink>
+		<name>in</name>
+		<type>short</type>
+		<vlen>$vlen</vlen>
+	</sink>
+	<source>
+		<name>out</name>
+		<type>float</type>
+		<vlen>$vlen</vlen>
+	</source>
+</block>

gr-blocks/include/blocks/CMakeLists.txt

@@ -105,6 +105,7 @@ install(FILES
     multiply_const_cc.h
     multiply_const_ff.h
     short_to_char.h
+    short_to_float.h
     DESTINATION ${GR_INCLUDE_DIR}/gnuradio/blocks
     COMPONENT "blocks_devel"
 )

gr-blocks/include/blocks/short_to_float.h

@@ -0,0 +1,62 @@
+/* -*- 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_SHORT_TO_FLOAT_H
+#define INCLUDED_BLOCKS_SHORT_TO_FLOAT_H
+
+#include <blocks/api.h>
+#include <gr_sync_block.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief Convert stream of shorts to a stream of floats
+     * \ingroup converter_blk
+     *
+     * \param vlen vector length of data streams.
+     * \param scale a scalar divider to change the output signal scale.
+     */
+    class BLOCKS_API short_to_float : virtual public gr_sync_block
+    {
+    public:
+
+      // gr::blocks::short_to_float_ff::sptr
+      typedef boost::shared_ptr<short_to_float> sptr;
+
+      static sptr make(size_t vlen=1, float scale=1.0);
+
+      /*!
+       * Get the scalar divider value.
+       */
+      virtual float scale() const = 0;
+
+      /*!
+       * Set the scalar divider value.
+       */
+      virtual void set_scale(float scale) = 0;
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_BLOCKS_SHORT_TO_FLOAT_H */

gr-blocks/lib/CMakeLists.txt

@@ -142,6 +142,7 @@ list(APPEND gr_blocks_sources
     multiply_const_cc_impl.cc
     multiply_const_ff_impl.cc
     short_to_char_impl.cc
+    short_to_float_impl.cc
 )
 
 list(APPEND blocks_libs

gr-blocks/lib/short_to_float_impl.cc

@@ -0,0 +1,68 @@
+/* -*- 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 "short_to_float_impl.h"
+#include <gr_io_signature.h>
+#include <volk/volk.h>
+
+namespace gr {
+  namespace blocks {
+
+    short_to_float::sptr short_to_float::make(size_t vlen, float scale)
+    {
+      return gnuradio::get_initial_sptr(new short_to_float_impl(vlen, scale));
+    }
+
+    short_to_float_impl::short_to_float_impl(size_t vlen, float scale)
+      : gr_sync_block("short_to_float",
+		      gr_make_io_signature (1, 1, sizeof(short)*vlen),
+		      gr_make_io_signature (1, 1, sizeof(float)*vlen)),
+	d_vlen(vlen), d_scale(scale)
+    {
+      const int alignment_multiple =
+	volk_get_alignment() / sizeof(float);
+      set_alignment(std::max(1, alignment_multiple));
+    }
+
+    int
+    short_to_float_impl::work(int noutput_items,
+			      gr_vector_const_void_star &input_items,
+			      gr_vector_void_star &output_items)
+    {
+      const short *in = (const short *) input_items[0];
+      float *out = (float *) output_items[0];
+
+      if(is_unaligned()) {
+	volk_16i_s32f_convert_32f_u(out, in, d_scale, d_vlen*noutput_items);
+      }
+      else {
+	volk_16i_s32f_convert_32f_a(out, in, d_scale, d_vlen*noutput_items);
+      }
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+}/* namespace gr */

gr-blocks/lib/short_to_float_impl.h

@@ -0,0 +1,51 @@
+/* -*- 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_SHORT_TO_FLOAT_IMPL_H
+#define INCLUDED_SHORT_TO_FLOAT_IMPL_H
+
+#include <blocks/short_to_float.h>
+
+namespace gr {
+  namespace blocks {
+
+    class BLOCKS_API short_to_float_impl : public short_to_float
+    {
+      size_t d_vlen;
+      float d_scale;
+
+    public:
+      short_to_float_impl(size_t vlen, float scale);
+
+      virtual float scale() const { return d_scale; }
+      virtual void set_scale(float scale) { d_scale = scale; }
+
+      int work(int noutput_items,
+	       gr_vector_const_void_star &input_items,
+	       gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+
+#endif /* INCLUDED_SHORT_TO_FLOAT_IMPL_H */

gr-blocks/python/qa_type_conversions.py

@@ -281,6 +281,26 @@ def test_short_to_char(self):
         self.tb.run()
         self.assertEqual(expected_data, dst.data())
 
+    def test_short_to_float_identity(self):
+        src_data = (1, 2, 3, 4, 5)
+        expected_data = (1.0, 2.0, 3.0, 4.0, 5.0)
+        src = gr.vector_source_s(src_data)
+        op = blocks_swig.short_to_float()
+        dst = gr.vector_sink_f()
+        self.tb.connect(src, op, dst)
+        self.tb.run()
+        self.assertEqual(expected_data, dst.data())
+
+    def test_short_to_float_scale(self):
+        src_data = (5, 10, 15, 20, 25)
+        expected_data = (1.0, 2.0, 3.0, 4.0, 5.0)
+        src = gr.vector_source_s(src_data)
+        op = blocks_swig.short_to_float(1, 5)
+        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

@@ -73,6 +73,7 @@
 #include "blocks/multiply_const_vff.h"
 #include "blocks/multiply_const_vcc.h"
 #include "blocks/short_to_char.h"
+#include "blocks/short_to_float.h"
 #include "blocks/sub_ff.h"
 #include "blocks/sub_ss.h"
 #include "blocks/sub_ii.h"
@@ -124,6 +125,7 @@
 %include "blocks/multiply_const_vff.h"
 %include "blocks/multiply_const_vcc.h"
 %include "blocks/short_to_char.h"
+%include "blocks/short_to_float.h"
 %include "blocks/sub_ff.h"
 %include "blocks/sub_ss.h"
 %include "blocks/sub_ii.h"
@@ -174,6 +176,7 @@ GR_SWIG_BLOCK_MAGIC2(blocks, multiply_const_vii);
 GR_SWIG_BLOCK_MAGIC2(blocks, multiply_const_vff);
 GR_SWIG_BLOCK_MAGIC2(blocks, multiply_const_vcc);
 GR_SWIG_BLOCK_MAGIC2(blocks, short_to_char);
+GR_SWIG_BLOCK_MAGIC2(blocks, short_to_float);
 GR_SWIG_BLOCK_MAGIC2(blocks, sub_ff);
 GR_SWIG_BLOCK_MAGIC2(blocks, sub_ss);
 GR_SWIG_BLOCK_MAGIC2(blocks, sub_ii);