[Commit-gnuradio] r11312 - in gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src: lib/filter python/gnuradio/blks2impl

[trondeau]

Author: trondeau
Date: 2009-06-29 20:24:48 -0600 (Mon, 29 Jun 2009)
New Revision: 11312

Added:
   
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.cc
   
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.h
   
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.i
   
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/python/gnuradio/blks2impl/pfb_arb_resampler.py
Log:
Adding a polyphase filterbank aritrary resampler.

Added: 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.cc
===================================================================
--- 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.cc
                          (rev 0)
+++ 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.cc
  2009-06-30 02:24:48 UTC (rev 11312)
@@ -0,0 +1,159 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2009 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 <gr_pfb_arb_resampler_ccf.h>
+#include <gr_fir_ccf.h>
+#include <gr_fir_util.h>
+#include <gr_io_signature.h>
+
+gr_pfb_arb_resampler_ccf_sptr gr_make_pfb_arb_resampler_ccf (float rate, 
+                                                            const 
std::vector<float> &taps)
+{
+  return gr_pfb_arb_resampler_ccf_sptr (new gr_pfb_arb_resampler_ccf (rate, 
taps));
+}
+
+
+gr_pfb_arb_resampler_ccf::gr_pfb_arb_resampler_ccf (float rate, 
+                                                   const std::vector<float> 
&taps)
+  : gr_block ("pfb_arb_resampler_ccf",
+             gr_make_io_signature (1, 1, sizeof(gr_complex)),
+             gr_make_io_signature (1, 1, sizeof(gr_complex))),
+    d_updated (false)
+{
+  d_int_rate = 32;
+  d_dec_rate = (unsigned int)floor(d_int_rate/rate);
+  d_flt_rate = (d_int_rate/rate) - d_dec_rate;
+  d_acc = 0;
+  d_last_filter = 0;
+  
+  d_filters = std::vector<gr_fir_ccf*>(d_int_rate);
+
+  // Create an FIR filter for each channel and zero out the taps
+  std::vector<float> vtaps(0, d_int_rate);
+  for(unsigned int i = 0; i < d_int_rate; i++) {
+    d_filters[i] = gr_fir_util::create_gr_fir_ccf(vtaps);
+  }
+
+  // Now, actually set the filters' taps
+  set_taps(taps);
+}
+
+gr_pfb_arb_resampler_ccf::~gr_pfb_arb_resampler_ccf ()
+{
+  for(unsigned int i = 0; i < d_int_rate; i++) {
+    delete d_filters[i];
+  }
+}
+
+void
+gr_pfb_arb_resampler_ccf::set_taps (const std::vector<float> &taps)
+{
+  unsigned int i,j;
+
+  unsigned int ntaps = taps.size();
+  d_taps_per_filter = (unsigned int)ceil((double)ntaps/(double)d_int_rate);
+
+  // Create d_numchan vectors to store each channel's taps
+  d_taps.resize(d_int_rate);
+  
+  // Partition the filter
+  for(i = 0; i < d_int_rate; i++) {
+    // Each channel uses all d_taps_per_filter with 0's if not enough taps to 
fill out
+    d_taps[i] = std::vector<float>(d_taps_per_filter, 0);
+    for(j = 0; j < d_taps_per_filter; j++) {
+      d_taps[i][j] = taps[i + j*d_int_rate];  // add taps to channels in 
reverse order
+    }
+    
+    // Build a filter for each channel and add it's taps to it
+    d_filters[i]->set_taps(d_taps[i]);
+  }
+
+  // Set the history to ensure enough input items for each filter
+  set_history (d_taps_per_filter);
+
+  d_updated = true;
+}
+
+void
+gr_pfb_arb_resampler_ccf::print_taps()
+{
+  unsigned int i, j;
+  for(i = 0; i < d_int_rate; i++) {
+    printf("filter[%d]: [", i);
+    for(j = 0; j < d_taps_per_filter; j++) {
+      printf(" %.4e", d_taps[i][j]);
+    }
+    printf("]\n");
+  }
+}
+
+int
+gr_pfb_arb_resampler_ccf::general_work (int noutput_items,
+                                       gr_vector_int &ninput_items,
+                                       gr_vector_const_void_star &input_items,
+                                       gr_vector_void_star &output_items)
+{
+  gr_complex *in = (gr_complex *) input_items[0];
+  gr_complex *out = (gr_complex *) output_items[0];
+
+  if (d_updated) {
+    d_updated = false;
+    return 0;               // history requirements may have changed.
+  }
+
+  int i = 0, j = 0, count = 0;
+  gr_complex o0, o1;
+
+  j = d_last_filter;
+  while(i < noutput_items) {
+    // start j by wrapping around mod the number of channels
+    
+    while(j < d_int_rate) {
+      // Take the current filter output
+      o0 = d_filters[j]->filter(&in[count]);
+
+      // Take the next filter output; wrap around to 0 if necessary
+      if(j+1 == d_int_rate)
+       o1 = d_filters[0]->filter(&in[count+1]);
+      else
+       o1 = d_filters[j]->filter(&in[count]);
+
+      out[i] = o0 + (o1 - o0)*d_flt_rate;
+      i++;
+
+      d_acc += d_dec_rate + d_flt_rate;
+      j = (int)floor(d_acc);
+    }
+    count++;
+    j = j % d_int_rate;
+    d_acc = d_acc - floor(d_acc);    
+  }
+
+  d_last_filter = j;
+
+  consume_each(count);
+  return i;
+}

Added: 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.h
===================================================================
--- 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.h
                           (rev 0)
+++ 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.h
   2009-06-30 02:24:48 UTC (rev 11312)
@@ -0,0 +1,75 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2009 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_PFB_ARB_RESAMPLER_CCF_H
+#define        INCLUDED_GR_PFB_ARB_RESAMPLER_CCF_H
+
+#include <gr_block.h>
+
+class gr_pfb_arb_resampler_ccf;
+typedef boost::shared_ptr<gr_pfb_arb_resampler_ccf> 
gr_pfb_arb_resampler_ccf_sptr;
+gr_pfb_arb_resampler_ccf_sptr gr_make_pfb_arb_resampler_ccf (float rate,
+                                                            const 
std::vector<float> &taps);
+
+class gr_fir_ccf;
+
+/*!
+ * \brief FIR filter with gr_complex input, gr_complex output and float taps
+ * \ingroup filter_blk
+ */
+class gr_pfb_arb_resampler_ccf : public gr_block
+{
+ private:
+  friend gr_pfb_arb_resampler_ccf_sptr gr_make_pfb_arb_resampler_ccf (float 
rate,
+                                                                     const 
std::vector<float> &taps);
+
+  std::vector<gr_fir_ccf*> d_filters;
+  std::vector< std::vector<float> > d_taps;
+  unsigned int             d_int_rate;
+  unsigned int             d_dec_rate;
+  float                    d_flt_rate;
+  float                    d_acc;
+  unsigned int             d_last_filter;
+  unsigned int             d_taps_per_filter;
+  bool                    d_updated;
+
+  /*!
+   * Construct a Polyphase filterbank for channelization with the given 
+   * number of channels and taps
+   */
+  gr_pfb_arb_resampler_ccf (float rate, 
+                          const std::vector<float> &taps);
+  
+public:
+  ~gr_pfb_arb_resampler_ccf ();
+  
+  void set_taps (const std::vector<float> &taps);
+  void print_taps();
+  
+  int general_work (int noutput_items,
+                   gr_vector_int &ninput_items,
+                   gr_vector_const_void_star &input_items,
+                   gr_vector_void_star &output_items);
+};
+
+#endif

Added: 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.i
===================================================================
--- 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.i
                           (rev 0)
+++ 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/lib/filter/gr_pfb_arb_resampler_ccf.i
   2009-06-30 02:24:48 UTC (rev 11312)
@@ -0,0 +1,39 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2009 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.
+ */
+
+GR_SWIG_BLOCK_MAGIC(gr,pfb_arb_resampler_ccf);
+
+gr_pfb_arb_resampler_ccf_sptr gr_make_pfb_arb_resampler_ccf (float rate,
+                                                            const 
std::vector<float> &taps);
+
+class gr_pfb_arb_resampler_ccf : public gr_block
+{
+ private:
+  gr_pfb_arb_resampler_ccf (float rate,
+                           const std::vector<float> &taps);
+
+ public:
+  ~gr_pfb_arb_resampler_ccf ();
+
+  void set_taps (const std::vector<float> &taps);
+  void print_taps();
+};

Added: 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/python/gnuradio/blks2impl/pfb_arb_resampler.py
===================================================================
--- 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/python/gnuradio/blks2impl/pfb_arb_resampler.py
                          (rev 0)
+++ 
gnuradio/branches/developers/trondeau/pfb/gnuradio-core/src/python/gnuradio/blks2impl/pfb_arb_resampler.py
  2009-06-30 02:24:48 UTC (rev 11312)
@@ -0,0 +1,44 @@
+#!/usr/bin/env python
+#
+# Copyright 2009 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.
+# 
+
+from gnuradio import gr
+
+class pfb_arb_resampler_ccf(gr.hier_block2):
+    '''
+
+    '''
+    def __init__(self, rate, taps):
+       gr.hier_block2.__init__(self, "pfb_arb_resampler_ccf",
+                               gr.io_signature(1, 1, gr.sizeof_gr_complex), # 
Input signature
+                               gr.io_signature(1, 1, gr.sizeof_gr_complex)) # 
Output signature
+
+        self._rate = rate
+        self._taps = taps
+
+        self.pfb = gr.pfb_arb_resampler_ccf(self._rate, self._taps)
+
+        self.connect(self, self.pfb)
+        self.connect(self.pfb, self)
+        
+        
+        
+