1 files changed, 89 insertions, 0 deletions
diff --git a/gr-dtv/lib/dvbt/dvbt_convolutional_interleaver_impl.cc b/gr-dtv/lib/dvbt/dvbt_convolutional_interleaver_impl.cc
new file mode 100644
index 0000000000..e29ec8cfe2
--- /dev/null
+++ b/gr-dtv/lib/dvbt/dvbt_convolutional_interleaver_impl.cc
@@ -0,0 +1,89 @@
+/* -*- c++ -*- */
+/* 
+ * Copyright 2015 Free Software Foundation, Inc.
+ * 
+ * This 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.
+ * 
+ * This software 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 software; 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 <gnuradio/io_signature.h>
+#include "dvbt_convolutional_interleaver_impl.h"
+#include <deque>
+
+namespace gr {
+  namespace dtv {
+
+    dvbt_convolutional_interleaver::sptr
+    dvbt_convolutional_interleaver::make(int nsize, int I, int M)
+    {
+      return gnuradio::get_initial_sptr
+        (new dvbt_convolutional_interleaver_impl(nsize, I, M));
+    }
+
+    /*
+     * The private constructor
+     */
+    dvbt_convolutional_interleaver_impl::dvbt_convolutional_interleaver_impl(int blocks, int I, int M)
+      : sync_interpolator("dvbt_convolutional_interleaver",
+          io_signature::make(1, 1, sizeof (unsigned char) * I * blocks),
+          io_signature::make(1, 1, sizeof (unsigned char)), I * blocks),
+      d_blocks(blocks), d_I(I), d_M(M)
+    {
+      //Positions are shift registers (FIFOs)
+      //of length i*M
+      for (int i = 0; i < d_I; i++) {
+        d_shift.push_back(new std::deque<unsigned char>(d_M * i, 0));
+      }
+    }
+
+    /*
+     * Our virtual destructor.
+     */
+    dvbt_convolutional_interleaver_impl::~dvbt_convolutional_interleaver_impl()
+    {
+      for (unsigned int i = 0; i < d_shift.size(); i++) {
+        delete d_shift.back();
+        d_shift.pop_back();
+      }
+    }
+
+    int
+    dvbt_convolutional_interleaver_impl::work (int noutput_items,
+                       gr_vector_const_void_star &input_items,
+                       gr_vector_void_star &output_items)
+    {
+      const unsigned char *in = (const unsigned char *) input_items[0];
+      unsigned char *out = (unsigned char *) output_items[0];
+
+      for (int i = 0; i < (noutput_items / d_I); i++) {
+        //Process one block of I symbols
+        for (unsigned int j = 0; j < d_shift.size(); j++) {
+          d_shift[j]->push_front(in[(d_I * i) + j]);
+          out[(d_I * i) + j] = d_shift[j]->back();
+          d_shift[j]->pop_back();
+        }
+      }
+
+      // Tell runtime system how many output items we produced.
+      return noutput_items;
+    }
+
+  } /* namespace dtv */
+} /* namespace gr */
+