1 files changed, 80 insertions, 0 deletions
diff --git a/gr-blocks/lib/sample_and_hold_impl.cc b/gr-blocks/lib/sample_and_hold_impl.cc
new file mode 100644
index 0000000000..c5e25bca6c
--- /dev/null
+++ b/gr-blocks/lib/sample_and_hold_impl.cc
@@ -0,0 +1,80 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007,2010,2013,2018 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 "sample_and_hold_impl.h"
+#include <gnuradio/io_signature.h>
+
+namespace gr {
+  namespace blocks {
+
+    template <class T>
+    typename sample_and_hold<T>::sptr
+    sample_and_hold<T>::make()
+    {
+      return gnuradio::get_initial_sptr
+        (new sample_and_hold_impl<T> ());
+    }
+
+    template <class T>
+    sample_and_hold_impl<T> ::sample_and_hold_impl()
+    : sync_block("sample_and_hold",
+                    io_signature::make2(2, 2, sizeof(T), sizeof(char)),
+                    io_signature::make(1, 1, sizeof(T))),
+      d_data(0)
+    {
+    }
+
+    template <class T>
+    sample_and_hold_impl<T> ::~sample_and_hold_impl()
+    {
+    }
+
+    template <class T>
+    int
+    sample_and_hold_impl<T> ::work(int noutput_items,
+                      gr_vector_const_void_star &input_items,
+                      gr_vector_void_star &output_items)
+    {
+      T *iptr = (T *)input_items[0];
+      const char *ctrl = (const char *)input_items[1];
+      T *optr = (T *)output_items[0];
+
+      for(int i = 0; i < noutput_items; i++) {
+        if(ctrl[i]) {
+          d_data = iptr[i];
+        }
+        optr[i] = d_data;
+      }
+      return noutput_items;
+    }
+
+template class sample_and_hold<std::uint8_t>;
+template class sample_and_hold<std::int16_t>;
+template class sample_and_hold<std::int32_t>;
+template class sample_and_hold<float>;
+  } /* namespace blocks */
+} /* namespace gr */