blocks: added gr::blocks::float_to_uchar

gr-blocks/grc/blocks_block_tree.xml

@@ -52,5 +52,6 @@
 		<block>blocks_float_to_complex</block>
 		<block>blocks_float_to_int</block>
 		<block>blocks_float_to_short</block>
+		<block>blocks_float_to_uchar</block>
 	</cat>
 </cat>

gr-blocks/grc/blocks_float_uchar.xml

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

gr-blocks/include/blocks/CMakeLists.txt

@@ -97,6 +97,7 @@ install(FILES
     float_to_complex.h
     float_to_int.h
     float_to_short.h
+    float_to_uchar.h
     multiply_cc.h
     multiply_ff.h
     multiply_const_cc.h

gr-blocks/include/blocks/float_to_uchar.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_FLOAT_TO_UCHAR_H
+#define INCLUDED_BLOCKS_FLOAT_TO_UCHAR_H
+
+#include <blocks/api.h>
+#include <gr_sync_block.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief Convert stream of floats to a stream of unsigned chars
+     * \ingroup converter_blk
+     */
+    class BLOCKS_API float_to_uchar : virtual public gr_sync_block
+    {
+    public:
+
+      // gr::blocks::float_to_uchar_ff::sptr
+      typedef boost::shared_ptr<float_to_uchar> sptr;
+
+      static sptr make();
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_BLOCKS_FLOAT_TO_UCHAR_H */

gr-blocks/lib/CMakeLists.txt

@@ -132,6 +132,8 @@ list(APPEND gr_blocks_sources
     float_array_to_int.cc
     float_to_int_impl.cc
     float_to_short_impl.cc
+    float_array_to_uchar.cc
+    float_to_uchar_impl.cc
     multiply_cc_impl.cc
     multiply_ff_impl.cc
     multiply_const_cc_impl.cc

gr-blocks/lib/float_array_to_uchar.cc

@@ -0,0 +1,45 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2002,2012 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
+
+#define _ISOC9X_SOURCE
+#include <float_array_to_uchar.h>
+#include <math.h>
+
+static const int MIN_UCHAR = 0;
+static const int MAX_UCHAR =  255;
+
+void
+float_array_to_uchar(const float *in, unsigned char *out, int nsamples)
+{
+  for (int i = 0; i < nsamples; i++){
+    long int r = (long int) rint (in[i]);
+    if (r < MIN_UCHAR)
+      r = MIN_UCHAR;
+    else if (r > MAX_UCHAR)
+      r = MAX_UCHAR;
+    out[i] = r;
+  }
+}

gr-blocks/lib/float_array_to_uchar.h

@@ -0,0 +1,33 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2002,2012 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_FLOAT_ARRAY_TO_UCHAR_H
+#define INCLUDED_FLOAT_ARRAY_TO_UCHAR_H
+
+#include <blocks/api.h>
+
+/*!
+ * convert array of floats to unsigned chars with rounding and saturation.
+ */
+BLOCKS_API void float_array_to_uchar (const float *in, unsigned char *out, int nsamples);
+
+#endif /* INCLUDED_FLOAT_ARRAY_TO_UCHAR_H */

gr-blocks/lib/float_to_uchar_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 "float_to_uchar_impl.h"
+#include "float_array_to_uchar.h"
+#include <gr_io_signature.h>
+
+namespace gr {
+  namespace blocks {
+
+    float_to_uchar::sptr float_to_uchar::make()
+    {
+      return gnuradio::get_initial_sptr(new float_to_uchar_impl());
+    }
+
+    float_to_uchar_impl::float_to_uchar_impl()
+      : gr_sync_block("float_to_uchar",
+		      gr_make_io_signature (1, 1, sizeof(float)),
+		      gr_make_io_signature (1, 1, sizeof(unsigned char)))
+    {
+    }
+
+    int
+    float_to_uchar_impl::work(int noutput_items,
+			      gr_vector_const_void_star &input_items,
+			      gr_vector_void_star &output_items)
+    {
+      const float *in = (const float *)input_items[0];
+      unsigned char *out = (unsigned char *)output_items[0];
+
+      float_array_to_uchar(in, out, noutput_items);
+
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+}/* namespace gr */

gr-blocks/lib/float_to_uchar_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_FLOAT_TO_UCHAR_IMPL_H
+#define INCLUDED_FLOAT_TO_UCHAR_IMPL_H
+
+#include <blocks/float_to_uchar.h>
+
+namespace gr {
+  namespace blocks {
+
+    class BLOCKS_API float_to_uchar_impl : public float_to_uchar
+    {
+    public:
+      float_to_uchar_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_FLOAT_TO_UCHAR_IMPL_H */

gr-blocks/python/qa_type_conversions.py

@@ -231,6 +231,16 @@ def test_float_to_short_scale(self):
         self.tb.run()
         self.assertEqual(expected_data, dst.data())
 
+    def test_float_to_uchar(self):
+        src_data = (1.0, -2.0, 3.0, -4.0, 256.0)
+        expected_data = (1, 0, 3, 0, 255)
+        src = gr.vector_source_f(src_data)
+        op = blocks_swig.float_to_uchar()
+        dst = gr.vector_sink_b()
+        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

@@ -57,6 +57,7 @@
 #include "blocks/float_to_complex.h"
 #include "blocks/float_to_int.h"
 #include "blocks/float_to_short.h"
+#include "blocks/float_to_uchar.h"
 #include "blocks/multiply_ss.h"
 #include "blocks/multiply_ii.h"
 #include "blocks/multiply_ff.h"
@@ -104,6 +105,7 @@
 %include "blocks/float_to_complex.h"
 %include "blocks/float_to_int.h"
 %include "blocks/float_to_short.h"
+%include "blocks/float_to_uchar.h"
 %include "blocks/multiply_ss.h"
 %include "blocks/multiply_ii.h"
 %include "blocks/multiply_ff.h"
@@ -150,6 +152,7 @@ GR_SWIG_BLOCK_MAGIC2(blocks, float_to_char);
 GR_SWIG_BLOCK_MAGIC2(blocks, float_to_complex);
 GR_SWIG_BLOCK_MAGIC2(blocks, float_to_int);
 GR_SWIG_BLOCK_MAGIC2(blocks, float_to_short);
+GR_SWIG_BLOCK_MAGIC2(blocks, float_to_uchar);
 GR_SWIG_BLOCK_MAGIC2(blocks, multiply_ss);
 GR_SWIG_BLOCK_MAGIC2(blocks, multiply_ii);
 GR_SWIG_BLOCK_MAGIC2(blocks, multiply_ff);