From 439b427e80ebc767db6e4e732213d89c2a6febd4 Mon Sep 17 00:00:00 2001
From: Johnathan Corgan <jcorgan@corganenterprises.com>
Date: Tue, 19 Jun 2012 10:00:28 -0700
Subject: blocks: added gr::blocks::char_to_float
---
gr-blocks/lib/char_to_float_impl.cc | 65 +++++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)
create mode 100644 gr-blocks/lib/char_to_float_impl.cc
(limited to 'gr-blocks/lib/char_to_float_impl.cc')
diff --git a/gr-blocks/lib/char_to_float_impl.cc b/gr-blocks/lib/char_to_float_impl.cc
new file mode 100644
index 0000000000..22c5d2e252
--- /dev/null
+++ b/gr-blocks/lib/char_to_float_impl.cc
@@ -0,0 +1,65 @@
+/* -*- 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 "char_to_float_impl.h"
+#include <gr_io_signature.h>
+#include <volk/volk.h>
+
+namespace gr {
+ namespace blocks {
+
+ char_to_float::sptr char_to_float::make(size_t vlen, float scale)
+ {
+ return gnuradio::get_initial_sptr(new char_to_float_impl(vlen, scale));
+ }
+
+ char_to_float_impl::char_to_float_impl(size_t vlen, float scale)
+ : gr_sync_block("char_to_float",
+ gr_make_io_signature (1, -1, sizeof(char)*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
+ char_to_float_impl::work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items)
+ {
+ const int8_t *in = (const int8_t *) input_items[0];
+ float *out = (float *) output_items[0];
+
+ // Note: the unaligned benchmarked much faster than the aligned
+ volk_8i_s32f_convert_32f_u(out, in, d_scale, d_vlen*noutput_items);
+
+ return noutput_items;
+ }
+
+ } /* namespace blocks */
+}/* namespace gr */
--
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