1 files changed, 97 insertions, 0 deletions
diff --git a/gr-blocks/lib/min_blk_impl.cc b/gr-blocks/lib/min_blk_impl.cc
new file mode 100644
index 0000000000..df3b6b0896
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+++ b/gr-blocks/lib/min_blk_impl.cc
@@ -0,0 +1,97 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2014,2015,2016,2018 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 <min_blk_impl.h>
+#include <gnuradio/io_signature.h>
+
+namespace gr {
+  namespace blocks {
+
+    template <class T>
+    typename min_blk<T>::sptr
+    min_blk<T>::make(size_t vlen, size_t vlen_out)
+    {
+      return gnuradio::get_initial_sptr
+        (new min_blk_impl<T> (vlen,vlen_out));
+    }
+
+    template <class T>
+    min_blk_impl<T> ::min_blk_impl(size_t vlen, size_t vlen_out)
+    : sync_block("min",
+                 io_signature::make(1, -1, vlen*sizeof(T)),
+                 io_signature::make(1, 1, vlen_out*sizeof(T))),
+      d_vlen(vlen), d_vlen_out(vlen_out)
+    {
+      assert((vlen_out == vlen) || (vlen_out == 1));
+    }
+
+    template <class T>
+    min_blk_impl<T> ::~min_blk_impl()
+    {
+    }
+
+    template <class T>
+    int
+    min_blk_impl<T> ::work(int noutput_items,
+                      gr_vector_const_void_star &input_items,
+                      gr_vector_void_star &output_items)
+    {
+      T *optr = (T *)output_items[0];
+
+      int ninputs = input_items.size();
+
+      if(d_vlen_out == 1)
+	for(int i = 0; i < noutput_items; i++) {
+	  T min = ((T *)input_items[0])[i*d_vlen];
+	  for(int j = 0; j < (int)d_vlen; j++ ) {
+	    for(int k = 0; k < ninputs; k++) {
+	      if(((T *)input_items[k])[i*d_vlen + j] < min) {
+		min = ((T*)input_items[k])[i*d_vlen + j];
+	      }
+	    }
+	  }
+	  *optr++ = (T)min;
+	}
+
+      else // vector mode output
+	for(size_t i = 0; i < noutput_items * d_vlen_out; i++) {
+	  T min = ((T *)input_items[0])[i];
+	  for(int k = 1; k < ninputs; k++) {
+	    if(((T *)input_items[k])[i] < min) {
+	      min = ((T*)input_items[k])[i];
+	    }
+	  }
+	  *optr++ = (T)min;
+	}
+      return noutput_items;
+    }
+
+template class min_blk<std::int16_t>;
+template class min_blk<std::int32_t>;
+template class min_blk<float>;
+  } /* namespace blocks */
+} /* namespace gr */