1 files changed, 66 insertions, 0 deletions
diff --git a/host/lib/rfnoc/scalar_node_ctrl.cpp b/host/lib/rfnoc/scalar_node_ctrl.cpp
new file mode 100644
index 000000000..56cc4dcf2
--- /dev/null
+++ b/host/lib/rfnoc/scalar_node_ctrl.cpp
@@ -0,0 +1,66 @@
+//
+// Copyright 2014-2015 Ettus Research LLC
+//
+// This program 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 of the License, or
+// (at your option) any later version.
+//
+// This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/rfnoc/scalar_node_ctrl.hpp>
+#include <boost/bind.hpp>
+
+using namespace uhd::rfnoc;
+
+const double scalar_node_ctrl::SCALE_UNDEFINED = -1.0;
+
+static double _get_input_factor(scalar_node_ctrl::sptr node, size_t port)
+{
+    return node->get_input_scale_factor(port);
+}
+
+static double _get_output_factor(scalar_node_ctrl::sptr node, size_t port)
+{
+    return node->get_output_scale_factor(port);
+}
+
+// FIXME add recursion limiters (i.e. list of explored nodes)
+double scalar_node_ctrl::get_input_scale_factor(
+        size_t /* port */
+) {
+    try {
+        return find_downstream_unique_property<scalar_node_ctrl, double>(
+                boost::bind(_get_input_factor, _1, _2),
+                SCALE_UNDEFINED
+        );
+    } catch (const uhd::runtime_error &ex) {
+        throw uhd::runtime_error(str(
+            boost::format("Multiple scaling factors rates downstream of %s: %s.")
+            % unique_id() % ex.what()
+        ));
+    }
+}
+
+double scalar_node_ctrl::get_output_scale_factor(
+        size_t /* port */
+) {
+    try {
+        return find_upstream_unique_property<scalar_node_ctrl, double>(
+                boost::bind(_get_output_factor, _1, _2),
+                SCALE_UNDEFINED
+        );
+    } catch (const uhd::runtime_error &ex) {
+        throw uhd::runtime_error(str(
+            boost::format("Multiple scaling factors rates upstream of %s: %s.")
+            % unique_id() % ex.what()
+        ));
+    }
+}