blocks: added gr::blocks::float_to_uchar

5 files changed, 185 insertions, 0 deletions

diff --git a/gr-blocks/lib/CMakeLists.txt b/gr-blocks/lib/CMakeLists.txt
index f0f20fb5d..a6894f256 100644
--- a/gr-blocks/lib/CMakeLists.txt
+++ b/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
diff --git a/gr-blocks/lib/float_array_to_uchar.cc b/gr-blocks/lib/float_array_to_uchar.cc
new file mode 100644
index 000000000..06688e7b0
--- /dev/null
+++ b/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;
+  }
+}
diff --git a/gr-blocks/lib/float_array_to_uchar.h b/gr-blocks/lib/float_array_to_uchar.h
new file mode 100644
index 000000000..defed8e3e
--- /dev/null
+++ b/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 */
diff --git a/gr-blocks/lib/float_to_uchar_impl.cc b/gr-blocks/lib/float_to_uchar_impl.cc
new file mode 100644
index 000000000..22d0527b1
--- /dev/null
+++ b/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 */
diff --git a/gr-blocks/lib/float_to_uchar_impl.h b/gr-blocks/lib/float_to_uchar_impl.h
new file mode 100644
index 000000000..effd66c5c
--- /dev/null
+++ b/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 */