1 files changed, 83 insertions, 0 deletions
diff --git a/gr-blocks/lib/float_to_int_impl.cc b/gr-blocks/lib/float_to_int_impl.cc
new file mode 100644
index 000000000..24218ab68
--- /dev/null
+++ b/gr-blocks/lib/float_to_int_impl.cc
@@ -0,0 +1,83 @@
+/* -*- 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_int_impl.h"
+#include "float_array_to_int.h"
+#include <gr_io_signature.h>
+#include <volk/volk.h>
+
+namespace gr {
+  namespace blocks {
+
+    float_to_int::sptr float_to_int::make(size_t vlen, float scale)
+    {
+      return gnuradio::get_initial_sptr(new float_to_int_impl(vlen, scale));
+    }
+
+    float_to_int_impl::float_to_int_impl(size_t vlen, float scale)
+      : gr_sync_block("float_to_int",
+		      gr_make_io_signature (1, 1, sizeof(float)*vlen),
+		      gr_make_io_signature (1, 1, sizeof(int)*vlen)),
+	d_vlen(vlen), d_scale(scale)
+    {
+      const int alignment_multiple =
+	volk_get_alignment() / sizeof(int);
+      set_alignment(std::max(1, alignment_multiple));
+    }
+
+    int
+    float_to_int_impl::work(int noutput_items,
+			    gr_vector_const_void_star &input_items,
+			    gr_vector_void_star &output_items)
+    {
+      // Disable the Volk for now. There is a problem for large 32-bit ints that
+      // are not properly represented by the precisions of a single float, which
+      // can cause wrapping from large, positive numbers to negative.
+      // In gri_float_to_int, the value is first promoted to a 64-bit
+      // value, clipped, then converted to a float.
+#if 0
+      const float *in = (const float *) input_items[0];
+      int32_t *out = (int32_t *) output_items[0];
+      
+      if(is_unaligned()) {
+	volk_32f_s32f_convert_32i_u(out, in, d_scale, d_vlen*noutput_items);
+      }
+      else {
+	volk_32f_s32f_convert_32i_a(out, in, d_scale, d_vlen*noutput_items);
+      }
+#else
+      const float *in = (const float *) input_items[0];
+      int *out = (int *) output_items[0];
+      
+      float_array_to_int (in, out, d_scale, d_vlen*noutput_items);
+      
+#endif
+
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+}/* namespace gr */