1 files changed, 71 insertions, 0 deletions
diff --git a/gr-dtv/lib/atsc/atsc_equalizer_impl.h b/gr-dtv/lib/atsc/atsc_equalizer_impl.h
new file mode 100644
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+++ b/gr-dtv/lib/atsc/atsc_equalizer_impl.h
@@ -0,0 +1,71 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2014 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.
+ */
+
+#ifndef INCLUDED_DTV_ATSC_EQUALIZER_IMPL_H
+#define INCLUDED_DTV_ATSC_EQUALIZER_IMPL_H
+
+#include <gnuradio/dtv/atsc_equalizer.h>
+#include <gnuradio/dtv/atsc_consts.h>
+#include "atsc_syminfo_impl.h"
+
+namespace gr {
+  namespace dtv {
+
+    class atsc_equalizer_impl : public atsc_equalizer
+    {
+    private:
+      static const int NTAPS = 64;
+      static const int NPRETAPS = (int) (NTAPS * 0.8); // probably should be either .2 or .8
+
+      // the length of the field sync pattern that we know unequivocally
+      static const int KNOWN_FIELD_SYNC_LENGTH = 4 + 511 + 3 * 63;
+
+      float training_sequence1[KNOWN_FIELD_SYNC_LENGTH];
+      float training_sequence2[KNOWN_FIELD_SYNC_LENGTH];
+
+      void filterN(const float *input_samples, float *output_samples, int nsamples);
+      void adaptN(const float *input_samples, const float *training_pattern,
+                  float *output_samples, int nsamples);
+
+      float d_taps[NTAPS];
+
+      float data_mem[ATSC_DATA_SEGMENT_LENGTH + NTAPS]; // Buffer for previous data packet
+      float data_mem2[ATSC_DATA_SEGMENT_LENGTH];
+      unsigned short d_flags;
+      short d_segno;
+
+      int d_buff_not_filled;
+
+    public:
+      atsc_equalizer_impl();
+      ~atsc_equalizer_impl();
+
+      virtual int general_work(int noutput_items,
+                               gr_vector_int &ninput_items,
+                               gr_vector_const_void_star &input_items,
+                               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace dtv */
+} /* namespace gr */
+
+#endif /* INCLUDED_DTV_ATSC_EQUALIZER_IMPL_H */