Merge branch 'master' of git://github.com/gnuradio/gnuradio into grmodtool

21 files changed, 1647 insertions, 0 deletions

diff --git a/gr-blocks/lib/CMakeLists.txt b/gr-blocks/lib/CMakeLists.txt
index 560a55d57..e1b9b4f00 100644
--- a/gr-blocks/lib/CMakeLists.txt
+++ b/gr-blocks/lib/CMakeLists.txt
@@ -104,6 +104,8 @@ expand_cc_h_impl(not_XX             bb ss ii)
 expand_cc_h_impl(or_XX              bb ss ii)
 expand_cc_h_impl(sub_XX             ss ii ff cc)
 expand_cc_h_impl(xor_XX             bb ss ii)
+expand_cc_h_impl(packed_to_unpacked_XX bb ss ii)
+expand_cc_h_impl(unpacked_to_packed_XX bb ss ii)
 
 ########################################################################
 # Setup the include and linker paths
@@ -139,6 +141,7 @@ list(APPEND gr_blocks_sources
     complex_to_arg_impl.cc
     conjugate_cc_impl.cc
     deinterleave_impl.cc
+    delay_impl.cc
     file_source_impl.cc
     file_meta_sink_impl.cc
     file_meta_source_impl.cc
@@ -162,7 +165,11 @@ list(APPEND gr_blocks_sources
     multiply_const_ff_impl.cc
     nlog10_ff_impl.cc
     patterned_interleaver_impl.cc
+    peak_detector2_fb_impl.cc
+    regenerate_bb_impl.cc
     repeat_impl.cc
+    rms_cf_impl.cc
+    rms_ff_impl.cc
     short_to_char_impl.cc
     short_to_float_impl.cc
     stream_mux_impl.cc
@@ -170,6 +177,9 @@ list(APPEND gr_blocks_sources
     stream_to_vector_impl.cc
     streams_to_stream_impl.cc
     streams_to_vector_impl.cc
+    stretch_ff_impl.cc
+    threshold_ff_impl.cc
+    throttle_impl.cc
     uchar_array_to_float.cc
     uchar_to_float_impl.cc
     vector_to_stream_impl.cc
diff --git a/gr-blocks/lib/delay_impl.cc b/gr-blocks/lib/delay_impl.cc
new file mode 100644
index 000000000..67449aca2
--- /dev/null
+++ b/gr-blocks/lib/delay_impl.cc
@@ -0,0 +1,141 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007,2010,2012-2013 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 "delay_impl.h"
+#include <gr_io_signature.h>
+#include <string.h>
+
+namespace gr {
+  namespace blocks {
+
+    delay::sptr
+    delay::make(size_t itemsize, int delay)
+    {
+      return gnuradio::get_initial_sptr
+        (new delay_impl(itemsize, delay));
+    }
+
+    delay_impl::delay_impl(size_t itemsize, int delay)
+      : gr_block("delay",
+                 gr_make_io_signature(1, -1, itemsize),
+                 gr_make_io_signature(1, -1, itemsize)),
+        d_itemsize(itemsize)
+    {
+      set_dly(delay);
+      d_delta = 0;
+    }
+
+    delay_impl::~delay_impl()
+    {
+    }
+
+    void
+    delay_impl::forecast(int noutput_items,
+                         gr_vector_int &ninput_items_required)
+    {
+      // make sure all inputs have noutput_items available
+      unsigned ninputs = ninput_items_required.size();
+      for(unsigned i = 0; i < ninputs; i++)
+        ninput_items_required[i] = noutput_items;
+    }
+
+    void
+    delay_impl::set_dly(int d)
+    {
+      // only set a new delta if there is a change in the delay; this
+      // protects from quickly-repeated calls to this function that
+      // would end with d_delta=0.
+      if(d != dly()) {
+        gruel::scoped_lock l(d_mutex_delay);
+        int old = dly();
+        set_history(d+1);
+        d_delta += dly() - old;
+      }
+    }
+
+    int
+    delay_impl::general_work(int noutput_items,
+                             gr_vector_int &ninput_items,
+                             gr_vector_const_void_star &input_items,
+                             gr_vector_void_star &output_items)
+    {
+      gruel::scoped_lock l(d_mutex_delay);
+      assert(input_items.size() == output_items.size());
+
+      const char *iptr;
+      char *optr;
+      int cons, ret;
+
+      // No change in delay; just memcpy ins to outs
+      if(d_delta == 0) {
+        for(size_t i = 0; i < input_items.size(); i++) {
+          iptr = (const char *)input_items[i];
+          optr = (char *)output_items[i];
+          std::memcpy(optr, iptr, noutput_items*d_itemsize);
+        }
+        cons = noutput_items;
+        ret = noutput_items;
+      }
+
+      // Skip over d_delta items on the input
+      else if(d_delta < 0) {
+        int n_to_copy, n_adj;
+        int delta = -d_delta;
+        n_to_copy = std::max(0, noutput_items-delta);
+        n_adj = std::min(delta, noutput_items);
+        for(size_t i = 0; i < input_items.size(); i++) {
+          iptr = (const char *) input_items[i];
+          optr = (char *) output_items[i];
+          std::memcpy(optr, iptr+delta*d_itemsize, n_to_copy*d_itemsize);
+        }
+        cons = noutput_items;
+        ret = n_to_copy;
+        delta -= n_adj;
+        d_delta = -delta;
+      }
+
+      //produce but not consume (inserts zeros)
+      else {  // d_delta > 0
+        int n_from_input, n_padding;
+        n_from_input = std::max(0, noutput_items-d_delta);
+        n_padding = std::min(d_delta, noutput_items);
+        for(size_t i = 0; i < input_items.size(); i++) {
+          iptr = (const char *) input_items[i];
+          optr = (char *) output_items[i];
+          std::memset(optr, 0, n_padding*d_itemsize);
+          std::memcpy(optr, iptr, n_from_input*d_itemsize);
+        }
+        cons = n_from_input;
+        ret = noutput_items;
+        d_delta -= n_padding;
+      }
+
+      consume_each(cons);
+      return ret;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
diff --git a/gr-blocks/lib/delay_impl.h b/gr-blocks/lib/delay_impl.h
new file mode 100644
index 000000000..56d971b11
--- /dev/null
+++ b/gr-blocks/lib/delay_impl.h
@@ -0,0 +1,58 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007,2012-2013 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_GR_DELAY_IMPL_H
+#define INCLUDED_GR_DELAY_IMPL_H
+
+#include <blocks/delay.h>
+#include <gruel/thread.h>
+
+namespace gr {
+  namespace blocks {
+
+    class delay_impl : public delay
+    {
+    private:
+      void forecast(int noutput_items,
+                    gr_vector_int &ninput_items_required);
+
+      size_t d_itemsize;
+      int d_delta;
+      gruel::mutex d_mutex_delay;
+
+    public:
+      delay_impl(size_t itemsize, int delay);
+      ~delay_impl();
+
+      int dly() const { return history()-1; }
+      void set_dly(int d);
+
+      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 blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_DELAY_IMPL_H */
diff --git a/gr-blocks/lib/packed_to_unpacked_XX_impl.cc.t b/gr-blocks/lib/packed_to_unpacked_XX_impl.cc.t
new file mode 100644
index 000000000..4f34d8347
--- /dev/null
+++ b/gr-blocks/lib/packed_to_unpacked_XX_impl.cc.t
@@ -0,0 +1,147 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2013 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.
+ */
+
+// @WARNING@
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "@NAME_IMPL@.h"
+#include <gr_io_signature.h>
+#include <blocks/log2_const.h>
+#include <assert.h>
+
+namespace gr {
+  namespace blocks {
+
+    static const unsigned int BITS_PER_TYPE = sizeof(@I_TYPE@) * 8;
+    static const unsigned int LOG2_L_TYPE = log2_const<sizeof(@I_TYPE@) * 8>();
+
+    @NAME@::sptr
+    @NAME@::make(unsigned int bits_per_chunk,
+                 gr_endianness_t endianness)
+    {
+      return gnuradio::get_initial_sptr
+        (new @NAME_IMPL@(bits_per_chunk, endianness));
+    }
+
+    @NAME_IMPL@::@NAME_IMPL@(unsigned int bits_per_chunk,
+                             gr_endianness_t endianness)
+    : gr_block("@NAME@",
+               gr_make_io_signature(1, -1, sizeof(@I_TYPE@)),
+               gr_make_io_signature(1, -1, sizeof(@O_TYPE@))),
+      d_bits_per_chunk(bits_per_chunk), d_endianness(endianness), d_index(0)
+    {
+      assert(bits_per_chunk <= BITS_PER_TYPE);
+      assert(bits_per_chunk > 0);
+
+      set_relative_rate((1.0 * BITS_PER_TYPE) / bits_per_chunk);
+    }
+
+    @NAME_IMPL@::~@NAME_IMPL@()
+    {
+    }
+
+    void
+    @NAME_IMPL@::forecast(int noutput_items,
+                          gr_vector_int &ninput_items_required)
+    {
+      int input_required = (int)ceil((d_index + noutput_items * d_bits_per_chunk) 
+                                     / (1.0 * BITS_PER_TYPE));
+      unsigned ninputs = ninput_items_required.size();
+      for(unsigned int i = 0; i < ninputs; i++) {
+        ninput_items_required[i] = input_required;
+        //printf("Forecast wants %d needs %d\n",noutput_items,ninput_items_required[i]);
+      }
+    }
+
+    unsigned int
+    get_bit_le(const @I_TYPE@ *in_vector, unsigned int bit_addr)
+    {
+      @I_TYPE@ x = in_vector[bit_addr >> LOG2_L_TYPE];
+      return (x >> (bit_addr & (BITS_PER_TYPE-1))) & 1;
+    }
+
+    unsigned int
+    get_bit_be(const @I_TYPE@ *in_vector, unsigned int bit_addr)
+    {
+      @I_TYPE@ x = in_vector[bit_addr >> LOG2_L_TYPE];
+      return (x >> ((BITS_PER_TYPE-1) - (bit_addr & (BITS_PER_TYPE-1)))) & 1;
+    }
+
+    int
+    @NAME_IMPL@::general_work(int noutput_items,
+                              gr_vector_int &ninput_items,
+                              gr_vector_const_void_star &input_items,
+                              gr_vector_void_star &output_items)
+    {
+      unsigned int index_tmp = d_index;
+
+      assert(input_items.size() == output_items.size());
+      int nstreams = input_items.size();
+
+      for (int m=0; m < nstreams; m++){
+        const @I_TYPE@ *in = (@I_TYPE@ *)input_items[m];
+        @O_TYPE@ *out = (@O_TYPE@ *)output_items[m];
+        index_tmp = d_index;
+
+        // per stream processing
+
+        switch(d_endianness) {
+        case GR_MSB_FIRST:
+          for(int i = 0; i < noutput_items; i++) {
+            //printf("here msb %d\n",i);
+            @O_TYPE@ x = 0;
+            for(unsigned int j = 0; j < d_bits_per_chunk; j++, index_tmp++)
+              x = (x<<1) | get_bit_be(in, index_tmp);
+            out[i] = x;
+          }
+          break;
+
+        case GR_LSB_FIRST:
+          for(int i = 0; i < noutput_items; i++) {
+            //printf("here lsb %d\n",i);
+            @O_TYPE@ x = 0;
+            for(unsigned int j = 0; j < d_bits_per_chunk; j++, index_tmp++)
+              x = (x<<1) | get_bit_le(in, index_tmp);
+            out[i] = x;
+          }
+          break;
+
+        default:
+          assert(0);
+        }
+
+        //printf("almost got to end\n");
+        assert(ninput_items[m] >= (int)((d_index+(BITS_PER_TYPE-1)) >> LOG2_L_TYPE));
+      }
+
+      d_index = index_tmp;
+      consume_each(d_index >> LOG2_L_TYPE);
+      d_index = d_index & (BITS_PER_TYPE-1);
+      //printf("got to end\n");
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
diff --git a/gr-blocks/lib/packed_to_unpacked_XX_impl.h.t b/gr-blocks/lib/packed_to_unpacked_XX_impl.h.t
new file mode 100644
index 000000000..f83496fa7
--- /dev/null
+++ b/gr-blocks/lib/packed_to_unpacked_XX_impl.h.t
@@ -0,0 +1,59 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006,2013 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.
+ */
+
+// @WARNING@
+
+#ifndef @GUARD_NAME_IMPL@
+#define @GUARD_NAME_IMPL@
+
+#include <blocks/@NAME@.h>
+
+namespace gr {
+  namespace blocks {
+
+    class @NAME_IMPL@ : public @NAME@
+    {
+    private:
+      unsigned int    d_bits_per_chunk;
+      gr_endianness_t d_endianness;
+      unsigned int    d_index;
+
+    public:
+      @NAME_IMPL@(unsigned int bits_per_chunk,
+                  gr_endianness_t endianness);
+      ~@NAME_IMPL@();
+
+      void forecast(int noutput_items,
+                    gr_vector_int &ninput_items_required);
+      int general_work(int noutput_items,
+                       gr_vector_int &ninput_items,
+                       gr_vector_const_void_star &input_items,
+                       gr_vector_void_star &output_items);
+
+      bool check_topology(int ninputs, int noutputs)
+      { return ninputs == noutputs; }
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* @GUARD_NAME_IMPL@ */
diff --git a/gr-blocks/lib/peak_detector2_fb_impl.cc b/gr-blocks/lib/peak_detector2_fb_impl.cc
new file mode 100644
index 000000000..0d375c3ba
--- /dev/null
+++ b/gr-blocks/lib/peak_detector2_fb_impl.cc
@@ -0,0 +1,118 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007,2010,2013 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 "peak_detector2_fb_impl.h"
+#include <gr_io_signature.h>
+#include <string.h>
+
+namespace gr {
+  namespace blocks {
+
+    peak_detector2_fb::sptr
+    peak_detector2_fb::make(float threshold_factor_rise,
+                            int look_ahead, float alpha)
+    {
+      return gnuradio::get_initial_sptr
+        (new peak_detector2_fb_impl(threshold_factor_rise,
+                                    look_ahead, alpha));
+    }
+
+    peak_detector2_fb_impl::peak_detector2_fb_impl(float threshold_factor_rise,
+                                                   int look_ahead, float alpha)
+      : gr_sync_block("peak_detector2_fb",
+                      gr_make_io_signature(1, 1, sizeof(float)),
+                      gr_make_io_signature2(1, 2, sizeof(char), sizeof(float))),
+        d_threshold_factor_rise(threshold_factor_rise),
+        d_look_ahead(look_ahead), d_alpha(alpha), d_avg(0.0f), d_found(false)
+    {
+    }
+
+    peak_detector2_fb_impl::~peak_detector2_fb_impl()
+    {
+    }
+
+    int
+    peak_detector2_fb_impl::work(int noutput_items,
+                                 gr_vector_const_void_star &input_items,
+                                 gr_vector_void_star &output_items)
+    {
+      float *iptr = (float *)input_items[0];
+      char *optr = (char *)output_items[0];
+
+      assert(noutput_items >= 2);
+
+      memset(optr, 0, noutput_items*sizeof(char));
+
+      for(int i = 0; i < noutput_items; i++) {
+        if(!d_found) {
+          // Have not yet detected presence of peak
+          if(iptr[i] > d_avg * (1.0f + d_threshold_factor_rise)) {
+            d_found = true;
+            d_look_ahead_remaining = d_look_ahead;
+            d_peak_val = -(float)INFINITY;
+          }
+          else {
+            d_avg = d_alpha*iptr[i] + (1.0f - d_alpha)*d_avg;
+          }
+        }
+        else {
+          // Detected presence of peak
+          if(iptr[i] > d_peak_val) {
+            d_peak_val = iptr[i];
+            d_peak_ind = i;
+          }
+          else if(d_look_ahead_remaining <= 0) {
+            optr[d_peak_ind] = 1;
+            d_found = false;
+            d_avg = iptr[i];
+          }
+
+          // Have not yet located peak, loop and keep searching.
+          d_look_ahead_remaining--;
+        }
+
+        // Every iteration of the loop, write debugging signal out if
+        // connected:
+        if(output_items.size() == 2) {
+          float *sigout = (float *)output_items[1];
+          sigout[i] = d_avg;
+        }
+      } // loop
+
+      if(!d_found)
+        return noutput_items;
+
+      // else if detected presence, keep searching during the next call to work.
+      int tmp = d_peak_ind;
+      d_peak_ind = 1;
+
+      return tmp - 1;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+
diff --git a/gr-blocks/lib/peak_detector2_fb_impl.h b/gr-blocks/lib/peak_detector2_fb_impl.h
new file mode 100644
index 000000000..f03dd36a8
--- /dev/null
+++ b/gr-blocks/lib/peak_detector2_fb_impl.h
@@ -0,0 +1,64 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007,2013 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_GR_PEAK_DETECTOR2_FB_IMPL_H
+#define INCLUDED_GR_PEAK_DETECTOR2_FB_IMPL_H
+
+#include <blocks/peak_detector2_fb.h>
+
+namespace gr {
+  namespace blocks {
+
+    class peak_detector2_fb_impl : public peak_detector2_fb
+    {
+    private:
+      float d_threshold_factor_rise;
+      int d_look_ahead;
+      int d_look_ahead_remaining;
+      int d_peak_ind;
+      float d_peak_val;
+      float d_alpha;
+      float d_avg;
+      bool d_found;
+
+    public:
+      peak_detector2_fb_impl(float threshold_factor_rise,
+                             int look_ahead, float alpha);
+      ~peak_detector2_fb_impl();
+
+      void set_threshold_factor_rise(float thr) { d_threshold_factor_rise = thr; }
+      void set_look_ahead(int look) { d_look_ahead = look; }
+      void set_alpha(int alpha) { d_alpha = alpha; }
+
+      float threshold_factor_rise() { return d_threshold_factor_rise; }
+      int look_ahead() { return d_look_ahead; }
+      float alpha() { return d_alpha; }
+
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_PEAK_DETECTOR2_FB_IMPL_H */
diff --git a/gr-blocks/lib/regenerate_bb_impl.cc b/gr-blocks/lib/regenerate_bb_impl.cc
new file mode 100644
index 000000000..4472efb6d
--- /dev/null
+++ b/gr-blocks/lib/regenerate_bb_impl.cc
@@ -0,0 +1,103 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007,2010,2013 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 "regenerate_bb_impl.h"
+#include <gr_io_signature.h>
+
+namespace gr {
+  namespace blocks {
+
+    regenerate_bb::sptr
+    regenerate_bb::make(int period, unsigned int max_regen)
+    {
+      return gnuradio::get_initial_sptr
+        (new regenerate_bb_impl(period, max_regen));
+    }
+
+    regenerate_bb_impl::regenerate_bb_impl(int period, unsigned int max_regen)
+      : gr_sync_block("regenerate_bb",
+                      gr_make_io_signature(1, 1, sizeof(char)),
+                      gr_make_io_signature(1, 1, sizeof(char))),
+        d_period(period),
+        d_countdown(0),
+        d_max_regen(max_regen),
+        d_regen_count(max_regen)
+    {
+    }
+
+    regenerate_bb_impl::~regenerate_bb_impl()
+    {
+    }
+
+    void 
+    regenerate_bb_impl::set_max_regen(unsigned int regen)
+    {
+      d_max_regen = regen;
+      d_countdown = 0;
+      d_regen_count = d_max_regen;
+    }
+
+    void
+    regenerate_bb_impl::set_period(int period)
+    {
+      d_period = period;
+      d_countdown = 0;
+      d_regen_count = d_max_regen;
+    }
+
+    int
+    regenerate_bb_impl::work(int noutput_items,
+                             gr_vector_const_void_star &input_items,
+                             gr_vector_void_star &output_items)
+    {
+      const char *iptr = (const char *)input_items[0];
+      char *optr = (char *)output_items[0];
+
+      for(int i = 0; i < noutput_items; i++) {
+        optr[i] = 0;
+
+        if(d_regen_count < d_max_regen) {
+          d_countdown--;
+
+          if(d_countdown == 0) {
+            optr[i] = 1;
+            d_countdown = d_period;
+            d_regen_count++;
+          }
+        }
+
+        if(iptr[i] == 1) {
+          d_countdown = d_period;
+          optr[i] = 1;
+          d_regen_count = 0;
+        }
+
+      }
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
diff --git a/gr-blocks/lib/regenerate_bb_impl.h b/gr-blocks/lib/regenerate_bb_impl.h
new file mode 100644
index 000000000..bcfa18391
--- /dev/null
+++ b/gr-blocks/lib/regenerate_bb_impl.h
@@ -0,0 +1,57 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007,2012-2013 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_GR_REGENERATE_BB_H
+#define INCLUDED_GR_REGENERATE_BB_IMPL_H
+
+#include <blocks/regenerate_bb.h>
+
+namespace gr {
+  namespace blocks {
+
+    class regenerate_bb_impl : public regenerate_bb
+    {
+    private:
+      int d_period;
+      int d_countdown;
+      unsigned int d_max_regen;
+      unsigned int d_regen_count;
+
+    public:
+      regenerate_bb_impl(int period, unsigned int max_regen=500);
+      ~regenerate_bb_impl();
+
+      void set_max_regen(unsigned int regen);
+      void set_period(int period);
+
+      unsigned int max_regen() const { return d_max_regen; };
+      int period() const { return d_period; };
+
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_REGENERATE_BB_IMPL_H */
diff --git a/gr-blocks/lib/rms_cf_impl.cc b/gr-blocks/lib/rms_cf_impl.cc
new file mode 100644
index 000000000..d956b45f1
--- /dev/null
+++ b/gr-blocks/lib/rms_cf_impl.cc
@@ -0,0 +1,77 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2010,2013 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 "rms_cf_impl.h"
+#include <gr_io_signature.h>
+#include <cmath>
+
+namespace gr {
+  namespace blocks {
+
+    rms_cf::sptr
+    rms_cf::make(double alpha)
+    {
+      return gnuradio::get_initial_sptr
+        (new rms_cf_impl(alpha));
+    }
+
+    rms_cf_impl::rms_cf_impl (double alpha)
+      : gr_sync_block("rms_cf",
+                      gr_make_io_signature(1, 1, sizeof(gr_complex)),
+                      gr_make_io_signature(1, 1, sizeof(float))),
+        d_iir(alpha)
+    {
+    }
+
+    rms_cf_impl::~rms_cf_impl()
+    {
+    }
+
+    void
+    rms_cf_impl::set_alpha(double alpha)
+    {
+      d_iir.set_taps(alpha);
+    }
+
+    int
+    rms_cf_impl::work(int noutput_items,
+                      gr_vector_const_void_star &input_items,
+                      gr_vector_void_star &output_items)
+    {
+      const gr_complex *in = (const gr_complex *)input_items[0];
+      float *out = (float *)output_items[0];
+
+      for(int i = 0; i < noutput_items; i++) {
+        double mag_sqrd = in[i].real()*in[i].real() + in[i].imag()*in[i].imag();
+        double f = d_iir.filter(mag_sqrd);
+        out[i] = sqrt(f);
+      }
+
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
diff --git a/gr-blocks/lib/rms_cf_impl.h b/gr-blocks/lib/rms_cf_impl.h
new file mode 100644
index 000000000..438b8549d
--- /dev/null
+++ b/gr-blocks/lib/rms_cf_impl.h
@@ -0,0 +1,56 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2013 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_BLOCKS_RMS_CF_IMPL_H
+#define INCLUDED_BLOCKS_RMS_CF_IMPL_H
+
+#include <blocks/rms_cf.h>
+#include <gr_single_pole_iir.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief RMS average power
+     * \ingroup math_blk
+     */
+    class rms_cf_impl : public rms_cf
+    {
+    private:
+      gr_single_pole_iir<double,double,double> d_iir;
+
+    public:
+      rms_cf_impl(double alpha = 0.0001);
+      ~rms_cf_impl();
+
+      void set_alpha(double alpha);
+      
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_BLOCKS_RMS_CF_IMPL_H */
diff --git a/gr-blocks/lib/rms_ff_impl.cc b/gr-blocks/lib/rms_ff_impl.cc
new file mode 100644
index 000000000..2b8cdc34e
--- /dev/null
+++ b/gr-blocks/lib/rms_ff_impl.cc
@@ -0,0 +1,77 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2010,2013 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 "rms_ff_impl.h"
+#include <gr_io_signature.h>
+#include <cmath>
+
+namespace gr {
+  namespace blocks {
+
+    rms_ff::sptr
+    rms_ff::make(double alpha)
+    {
+      return gnuradio::get_initial_sptr
+        (new rms_ff_impl(alpha));
+    }
+
+    rms_ff_impl::rms_ff_impl(double alpha)
+      : gr_sync_block("rms_ff",
+                      gr_make_io_signature(1, 1, sizeof(float)),
+                      gr_make_io_signature(1, 1, sizeof(float))),
+        d_iir(alpha)
+    {
+    }
+
+    rms_ff_impl::~rms_ff_impl()
+    {
+    }
+
+    void
+    rms_ff_impl::set_alpha(double alpha)
+    {
+      d_iir.set_taps(alpha);
+    }
+
+    int
+    rms_ff_impl::work(int noutput_items,
+                      gr_vector_const_void_star &input_items,
+                      gr_vector_void_star &output_items)
+    {
+      const float *in = (const float *)input_items[0];
+      float *out = (float *)output_items[0];
+
+      for(int i = 0; i < noutput_items; i++) {
+        double mag_sqrd = in[i]*in[i];
+        double f = d_iir.filter(mag_sqrd);
+        out[i] = sqrt(f);
+      }
+
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
diff --git a/gr-blocks/lib/rms_ff_impl.h b/gr-blocks/lib/rms_ff_impl.h
new file mode 100644
index 000000000..82ecbda52
--- /dev/null
+++ b/gr-blocks/lib/rms_ff_impl.h
@@ -0,0 +1,55 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2013 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_BLOCKS_RMS_FF_IMPL_H
+#define INCLUDED_BLOCKS_RMS_FF_IMPL_H
+
+#include <blocks/rms_ff.h>
+#include <gr_single_pole_iir.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief RMS average power
+     * \ingroup math_blk
+     */
+    class rms_ff_impl : public rms_ff
+    {
+    private:
+      gr_single_pole_iir<double,double,double> d_iir;
+
+    public:
+      rms_ff_impl(double alpha  = 0.0001);
+      ~rms_ff_impl();
+
+      void set_alpha(double alpha);
+
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_BLOCKS_RMS_FF_IMPL_H */
diff --git a/gr-blocks/lib/stretch_ff_impl.cc b/gr-blocks/lib/stretch_ff_impl.cc
new file mode 100644
index 000000000..90bbc7ee5
--- /dev/null
+++ b/gr-blocks/lib/stretch_ff_impl.cc
@@ -0,0 +1,84 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008,2010,2013 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 "stretch_ff_impl.h"
+#include <gr_io_signature.h>
+
+namespace gr {
+  namespace blocks {
+
+    stretch_ff::sptr
+    stretch_ff::make(float lo, size_t vlen)
+    {
+      return gnuradio::get_initial_sptr
+        (new stretch_ff_impl(lo, vlen));
+    }
+
+    stretch_ff_impl::stretch_ff_impl(float lo, size_t vlen)
+      : gr_sync_block("stretch_ff",
+                      gr_make_io_signature(1, 1, vlen * sizeof(float)),
+                      gr_make_io_signature(1, 1, vlen * sizeof(float))),
+        d_lo(lo), d_vlen(vlen)
+    {
+    }
+
+    stretch_ff_impl::~stretch_ff_impl()
+    {
+    }
+
+    int
+    stretch_ff_impl::work(int noutput_items,
+                          gr_vector_const_void_star &input_items,
+                          gr_vector_void_star &output_items)
+    {
+      const float *in = (const float *)input_items[0];
+      float *out = (float *)output_items[0];
+
+      for(int count = 0; count < noutput_items; count++) {
+        float vmax = in[0] - d_lo;
+
+        for(unsigned int i = 1; i < d_vlen; i++) {
+          float vtmp = in[i] - d_lo;
+          if(vtmp > vmax)
+            vmax = vtmp;
+        }
+
+        if(vmax != 0.0)
+          for(unsigned int i = 0; i < d_vlen; i++)
+            out[i] = d_lo * (1.0 - (in[i] - d_lo) / vmax);
+        else
+          for(unsigned int i = 0; i < d_vlen; i++)
+            out[i] = in[i];
+
+        in  += d_vlen;
+        out += d_vlen;
+      }
+
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
diff --git a/gr-blocks/lib/stretch_ff_impl.h b/gr-blocks/lib/stretch_ff_impl.h
new file mode 100644
index 000000000..af69d835a
--- /dev/null
+++ b/gr-blocks/lib/stretch_ff_impl.h
@@ -0,0 +1,53 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008,2013 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_GR_STRETCH_FF_IMPL_H
+#define INCLUDED_GR_STRETCH_FF_IMPL_H
+
+#include <blocks/stretch_ff.h>
+
+namespace gr {
+  namespace blocks {
+    
+    class stretch_ff_impl : public stretch_ff
+    {
+    private:
+      float d_lo;     // the constant
+      size_t d_vlen;
+
+    public:
+      stretch_ff_impl(float lo, size_t vlen);
+      ~stretch_ff_impl();
+      
+      float lo() const { return d_lo; }
+      void set_lo(float lo) { d_lo = lo; }
+      size_t vlen() const { return d_vlen; }
+
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_STRETCH_FF_IMPL_H */
diff --git a/gr-blocks/lib/threshold_ff_impl.cc b/gr-blocks/lib/threshold_ff_impl.cc
new file mode 100644
index 000000000..477f2b1c8
--- /dev/null
+++ b/gr-blocks/lib/threshold_ff_impl.cc
@@ -0,0 +1,78 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2010,2013 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 "threshold_ff_impl.h"
+#include <gr_io_signature.h>
+
+namespace gr {
+  namespace blocks {
+
+    threshold_ff::sptr
+    threshold_ff::make(float lo, float hi, float initial_state)
+    {
+      return gnuradio::get_initial_sptr
+        (new threshold_ff_impl(lo, hi, initial_state));
+    }
+
+    threshold_ff_impl::threshold_ff_impl(float lo, float hi,
+                                         float initial_state)
+      : gr_sync_block("threshold_ff",
+                      gr_make_io_signature(1, 1, sizeof(float)),
+                      gr_make_io_signature(1, 1, sizeof(float))),
+        d_lo(lo), d_hi(hi), d_last_state(initial_state)
+    {
+    }
+
+    threshold_ff_impl::~threshold_ff_impl()
+    {
+    }
+
+    int
+    threshold_ff_impl::work(int noutput_items,
+                            gr_vector_const_void_star &input_items,
+                            gr_vector_void_star &output_items)
+    {
+      const float *in = (const float *)input_items[0];
+      float *out = (float *)output_items[0];
+
+      for(int i = 0; i < noutput_items; i++) {
+        if(in[i] > d_hi) {
+          out[i] = 1.0;
+          d_last_state = 1.0;
+        }
+        else if(in[i] < d_lo) {
+          out[i] = 0.0;
+          d_last_state = 0.0;
+        }
+        else
+          out[i] = d_last_state;
+      }
+
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
diff --git a/gr-blocks/lib/threshold_ff_impl.h b/gr-blocks/lib/threshold_ff_impl.h
new file mode 100644
index 000000000..41afaa52a
--- /dev/null
+++ b/gr-blocks/lib/threshold_ff_impl.h
@@ -0,0 +1,57 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2013 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_GR_THRESHOLD_FF_IMPL_H
+#define INCLUDED_GR_THRESHOLD_FF_IMPL_H
+
+#include <blocks/threshold_ff.h>
+
+namespace gr {
+  namespace blocks {
+
+    class threshold_ff_impl : public threshold_ff
+    {
+    private:
+      float d_lo, d_hi;    // the constant
+      float d_last_state;
+
+    public:
+      threshold_ff_impl(float lo, float hi,
+                        float initial_state=0);
+      ~threshold_ff_impl();
+
+      float lo() const { return d_lo; }
+      void set_lo(float lo) { d_lo = lo; }
+      float hi() const { return d_hi; }
+      void set_hi(float hi) { d_hi = hi; }
+      float last_state() const { return d_last_state; }
+      void set_last_state(float last_state) { d_last_state = last_state; }
+
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_THRESHOLD_FF_IMPL_H */
diff --git a/gr-blocks/lib/throttle_impl.cc b/gr-blocks/lib/throttle_impl.cc
new file mode 100644
index 000000000..49743e3f2
--- /dev/null
+++ b/gr-blocks/lib/throttle_impl.cc
@@ -0,0 +1,97 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005-2011 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 "throttle_impl.h"
+#include <gr_io_signature.h>
+#include <cstring>
+#include <boost/thread/thread.hpp>
+
+namespace gr {
+  namespace blocks {
+
+    throttle::sptr
+    throttle::make(size_t itemsize, double samples_per_sec)
+    {
+      return gnuradio::get_initial_sptr
+        (new throttle_impl(itemsize, samples_per_sec));
+    }
+
+    throttle_impl::throttle_impl(size_t itemsize,
+                                 double samples_per_second)
+      : gr_sync_block("throttle",
+                      gr_make_io_signature(1, 1, itemsize),
+                      gr_make_io_signature(1, 1, itemsize)),
+        d_itemsize(itemsize)
+    {
+      set_sample_rate(samples_per_second);
+    }
+
+    throttle_impl::~throttle_impl()
+    {
+    }
+
+    void
+    throttle_impl::set_sample_rate(double rate)
+    {
+      //changing the sample rate performs a reset of state params
+      d_start = boost::get_system_time();
+      d_total_samples = 0;
+      d_samps_per_tick = rate/boost::posix_time::time_duration::ticks_per_second();
+      d_samps_per_us = rate/1e6;
+    }
+
+    double
+    throttle_impl::sample_rate() const
+    {
+      return d_samps_per_us * 1e6;
+    }
+
+    int
+    throttle_impl::work(int noutput_items,
+                        gr_vector_const_void_star &input_items,
+                        gr_vector_void_star &output_items)
+    {
+      //calculate the expected number of samples to have passed through
+      boost::system_time now = boost::get_system_time();
+      boost::int64_t ticks = (now - d_start).ticks();
+      uint64_t expected_samps = uint64_t(d_samps_per_tick*ticks);
+
+      //if the expected samples was less, we need to throttle back
+      if(d_total_samples > expected_samps) {
+        boost::this_thread::sleep(boost::posix_time::microseconds
+                                  (long((d_total_samples - expected_samps)/d_samps_per_us)));
+      }
+
+      //copy all samples output[i] <= input[i]
+      const char *in = (const char *)input_items[0];
+      char *out = (char *)output_items[0];
+      std::memcpy(out, in, noutput_items * d_itemsize);
+      d_total_samples += noutput_items;
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
diff --git a/gr-blocks/lib/throttle_impl.h b/gr-blocks/lib/throttle_impl.h
new file mode 100644
index 000000000..86dbef2ac
--- /dev/null
+++ b/gr-blocks/lib/throttle_impl.h
@@ -0,0 +1,54 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005-2011,2013 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_GR_THROTTLE_IMPL_H
+#define INCLUDED_GR_THROTTLE_IMPL_H
+
+#include <blocks/throttle.h>
+
+namespace gr {
+  namespace blocks {
+
+    class throttle_impl : public throttle
+    {
+    private:
+      boost::system_time d_start;
+      size_t d_itemsize;
+      uint64_t d_total_samples;
+      double d_samps_per_tick, d_samps_per_us;
+
+    public:
+      throttle_impl(size_t itemsize, double samples_per_sec);
+      ~throttle_impl();
+
+      void set_sample_rate(double rate);
+      double sample_rate() const;
+
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_THROTTLE_IMPL_H */
diff --git a/gr-blocks/lib/unpacked_to_packed_XX_impl.cc.t b/gr-blocks/lib/unpacked_to_packed_XX_impl.cc.t
new file mode 100644
index 000000000..3a7428fd8
--- /dev/null
+++ b/gr-blocks/lib/unpacked_to_packed_XX_impl.cc.t
@@ -0,0 +1,143 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2006,2013 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.
+ */
+
+// @WARNING@
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "@NAME_IMPL@.h"
+#include <gr_io_signature.h>
+#include <assert.h>
+
+namespace gr {
+  namespace blocks {
+
+    static const unsigned int BITS_PER_TYPE = sizeof(@O_TYPE@) * 8;
+
+    @NAME@::sptr
+    @NAME@::make(unsigned int bits_per_chunk,
+                 gr_endianness_t endianness)
+    {
+      return gnuradio::get_initial_sptr
+        (new @NAME_IMPL@(bits_per_chunk, endianness));
+    }
+
+    @NAME_IMPL@::@NAME_IMPL@(unsigned int bits_per_chunk,
+                             gr_endianness_t endianness)
+    : gr_block("@NAME@",
+               gr_make_io_signature(1, -1, sizeof(@I_TYPE@)),
+               gr_make_io_signature(1, -1, sizeof(@O_TYPE@))),
+      d_bits_per_chunk(bits_per_chunk), d_endianness(endianness), d_index(0)
+    {
+      assert(bits_per_chunk <= BITS_PER_TYPE);
+      assert(bits_per_chunk > 0);
+
+      set_relative_rate(bits_per_chunk/(1.0 * BITS_PER_TYPE));
+    }
+
+    @NAME_IMPL@::~@NAME_IMPL@()
+    {
+    }
+
+    void
+    @NAME_IMPL@::forecast(int noutput_items,
+                          gr_vector_int &ninput_items_required)
+    {
+      int input_required = (int)ceil((d_index+noutput_items * 1.0 * BITS_PER_TYPE)
+                                     / d_bits_per_chunk);
+      unsigned ninputs = ninput_items_required.size();
+      for(unsigned int i = 0; i < ninputs; i++) {
+        ninput_items_required[i] = input_required;
+      }
+    }
+
+    unsigned int
+    get_bit_be1(const @I_TYPE@ *in_vector, unsigned int bit_addr,
+                unsigned int bits_per_chunk)
+    {
+      unsigned int byte_addr = (int)bit_addr/bits_per_chunk;
+      @I_TYPE@ x = in_vector[byte_addr];
+      unsigned int residue = bit_addr - byte_addr * bits_per_chunk;
+      //printf("Bit addr %d  byte addr %d  residue %d  val  %d\n",bit_addr,byte_addr,residue,(x>>(bits_per_chunk-1-residue))&1);
+      return (x >> (bits_per_chunk-1-residue)) & 1;
+    }
+
+    int
+    @NAME_IMPL@::general_work(int noutput_items,
+                              gr_vector_int &ninput_items,
+                              gr_vector_const_void_star &input_items,
+                              gr_vector_void_star &output_items)
+    {
+      unsigned int index_tmp = d_index;
+
+      assert(input_items.size() == output_items.size());
+      int nstreams = input_items.size();
+
+      for(int m=0; m< nstreams; m++) {
+        const @I_TYPE@ *in = (@I_TYPE@ *)input_items[m];
+        @O_TYPE@ *out = (@O_TYPE@ *)output_items[m];
+        index_tmp=d_index;
+
+        // per stream processing
+
+        //assert((ninput_items[m]-d_index)*d_bits_per_chunk >= noutput_items*BITS_PER_TYPE);
+
+        switch(d_endianness) {
+
+        case GR_MSB_FIRST:
+          for(int i = 0; i < noutput_items; i++) {
+            @O_TYPE@ tmp=0;
+            for(unsigned int j = 0; j < BITS_PER_TYPE; j++) {
+              tmp = (tmp<<1) | get_bit_be1(in, index_tmp, d_bits_per_chunk);
+              index_tmp++;
+            }
+            out[i] = tmp;
+          }
+          break;
+
+        case GR_LSB_FIRST:
+          for(int i = 0; i < noutput_items; i++) {
+            unsigned long tmp=0;
+            for(unsigned int j = 0; j < BITS_PER_TYPE; j++) {
+              tmp = (tmp>>1) | (get_bit_be1(in, index_tmp, d_bits_per_chunk) << (BITS_PER_TYPE-1));
+              index_tmp++;
+            }
+            out[i] = tmp;
+          }
+          break;
+
+        default:
+          assert(0);
+        }
+      }
+
+      d_index = index_tmp;
+      consume_each((int)(d_index/d_bits_per_chunk));
+      d_index = d_index%d_bits_per_chunk;
+
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */
diff --git a/gr-blocks/lib/unpacked_to_packed_XX_impl.h.t b/gr-blocks/lib/unpacked_to_packed_XX_impl.h.t
new file mode 100644
index 000000000..c8f414c55
--- /dev/null
+++ b/gr-blocks/lib/unpacked_to_packed_XX_impl.h.t
@@ -0,0 +1,59 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006.2013 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.
+ */
+
+// @WARNING@
+
+#ifndef @GUARD_NAME_IMPL@
+#define @GUARD_NAME_IMPL@
+
+#include <blocks/@NAME@.h>
+
+namespace gr {
+  namespace blocks {
+
+    class @NAME_IMPL@ : public @NAME@
+    {
+    private:
+      unsigned int    d_bits_per_chunk;
+      gr_endianness_t d_endianness;
+      unsigned int    d_index;
+
+    public:
+      @NAME_IMPL@(unsigned int bits_per_chunk,
+                  gr_endianness_t endianness);
+      ~@NAME_IMPL@();
+
+      void forecast(int noutput_items,
+                    gr_vector_int &ninput_items_required);
+      int general_work(int noutput_items,
+                       gr_vector_int &ninput_items,
+                       gr_vector_const_void_star &input_items,
+                       gr_vector_void_star &output_items);
+
+      bool check_topology(int ninputs, int noutputs)
+      { return ninputs == noutputs; }
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* @GUARD_NAME_IMPL@ */