From 80aa560bbb59cad4d4d351a1e9c8c1fb56897397 Mon Sep 17 00:00:00 2001
From: Johnathan Corgan
Date: Sat, 23 Jun 2012 09:57:06 -0700
Subject: blocks: added gr::blocks::complex_to_arg

---
 gr-blocks/lib/complex_to_arg_impl.cc | 70 ++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 gr-blocks/lib/complex_to_arg_impl.cc

(limited to 'gr-blocks/lib/complex_to_arg_impl.cc')

diff --git a/gr-blocks/lib/complex_to_arg_impl.cc b/gr-blocks/lib/complex_to_arg_impl.cc
new file mode 100644
index 000000000..87ac9966f
--- /dev/null
+++ b/gr-blocks/lib/complex_to_arg_impl.cc
@@ -0,0 +1,70 @@
+/* -*- 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 "complex_to_arg_impl.h"
+#include <gr_io_signature.h>
+#include <volk/volk.h>
+#include <gr_math.h>
+
+namespace gr {
+  namespace blocks {
+
+    complex_to_arg::sptr complex_to_arg::make(size_t vlen)
+    {
+      return gnuradio::get_initial_sptr(new complex_to_arg_impl(vlen));
+    }
+
+    complex_to_arg_impl::complex_to_arg_impl(size_t vlen)
+      : gr_sync_block("complex_to_arg",
+		      gr_make_io_signature (1, 1, sizeof(gr_complex)*vlen),
+		      gr_make_io_signature (1, 1, sizeof(float)*vlen)),
+	d_vlen(vlen)
+    {
+      const int alignment_multiple =
+	volk_get_alignment() / sizeof(float);
+      set_alignment(std::max(1,alignment_multiple));
+    }
+
+    int
+    complex_to_arg_impl::work(int noutput_items,
+			      gr_vector_const_void_star &input_items,
+			      gr_vector_void_star &output_items)
+    {
+      const gr_complex *in = (const gr_complex *) input_items[0];
+      float *out = (float *) output_items[0];
+      int noi = noutput_items * d_vlen;
+      
+      // The fast_atan2f is faster than Volk
+      for (int i = 0; i < noi; i++){
+	//    out[i] = std::arg (in[i]);
+	out[i] = gr_fast_atan2f(in[i]);
+      }
+      
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+}/* namespace gr */
-- 
cgit