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   1 <?xml version="1.0"?>
   2 <!--
   3 ###################################################
   4 ##Band Pass Filter: Custom wrapper
   5 ###################################################
   6  -->
   7 <block>
   8         <name>Band Pass Filter</name>
   9         <key>band_pass_filter</key>
  10         <import>from gnuradio import gr</import>
  11         <import>from gnuradio.gr import firdes</import>
  12         <make>gr.$(type)(#if str($type).startswith('interp') then $interp else $decim#, firdes.$(type.fcn)(
  13         $gain, $samp_rate, $low_cutoff_freq, $high_cutoff_freq, $width, firdes.$window, $beta))</make>
  14         <callback>set_taps(firdes.$(type.fcn)($gain, $samp_rate, $low_cutoff_freq, $high_cutoff_freq, $width, firdes.$window, $beta))</callback>
  15         <param>
  16                 <name>FIR Type</name>
  17                 <key>type</key>
  18                 <type>enum</type>
  19                 <!-- Real Band Pass Taps -->
  20                 <option>
  21                         <name>Complex->Complex (Real Taps) (Decim)</name>
  22                         <key>fir_filter_ccf</key>
  23                         <opt>input:complex</opt>
  24                         <opt>output:complex</opt>
  25                         <opt>fcn:band_pass</opt>
  26                 </option>
  27                 <option>
  28                         <name>Complex->Complex (Real Taps) (Interp)</name>
  29                         <key>interp_fir_filter_ccf</key>
  30                         <opt>input:complex</opt>
  31                         <opt>output:complex</opt>
  32                         <opt>fcn:band_pass</opt>
  33                 </option>
  34                 <option>
  35                         <name>Float->Float (Real Taps) (Decim)</name>
  36                         <key>fir_filter_fff</key>
  37                         <opt>input:float</opt>
  38                         <opt>output:float</opt>
  39                         <opt>fcn:band_pass</opt>
  40                 </option>
  41                 <option>
  42                         <name>Float->Float (Real Taps) (Interp)</name>
  43                         <key>interp_fir_filter_fff</key>
  44                         <opt>input:float</opt>
  45                         <opt>output:float</opt>
  46                         <opt>fcn:band_pass</opt>
  47                 </option>
  48                 <!-- Complex Band Pass Taps -->
  49                 <option>
  50                         <name>Complex->Complex (Complex Taps) (Decim)</name>
  51                         <key>fir_filter_ccc</key>
  52                         <opt>input:complex</opt>
  53                         <opt>output:complex</opt>
  54                         <opt>fcn:complex_band_pass</opt>
  55                 </option>
  56                 <option>
  57                         <name>Complex->Complex (Complex Taps) (Interp)</name>
  58                         <key>interp_fir_filter_ccc</key>
  59                         <opt>input:complex</opt>
  60                         <opt>output:complex</opt>
  61                         <opt>fcn:complex_band_pass</opt>
  62                 </option>
  63                 <option>
  64                         <name>Float->Complex (Complex Taps) (Decim)</name>
  65                         <key>fir_filter_fcc</key>
  66                         <opt>input:float</opt>
  67                         <opt>output:complex</opt>
  68                         <opt>fcn:complex_band_pass</opt>
  69                 </option>
  70                 <option>
  71                         <name>Float->Complex (Complex Taps) (Interp)</name>
  72                         <key>interp_fir_filter_fcc</key>
  73                         <opt>input:float</opt>
  74                         <opt>output:complex</opt>
  75                         <opt>fcn:complex_band_pass</opt>
  76                 </option>
  77         </param>
  78         <param>
  79                 <name>Decimation</name>
  80                 <key>decim</key>
  81                 <value>1</value>
  82                 <type>int</type>
  83                 <hide>#if str($type).startswith('interp') then 'all' else 'none'#</hide>
  84         </param>
  85         <param>
  86                 <name>Interpolation</name>
  87                 <key>interp</key>
  88                 <value>1</value>
  89                 <type>int</type>
  90                 <hide>#if str($type).startswith('interp') then 'none' else 'all'#</hide>
  91         </param>
  92         <param>
  93                 <name>Gain</name>
  94                 <key>gain</key>
  95                 <value>1</value>
  96                 <type>real</type>
  97         </param>
  98         <param>
  99                 <name>Sample Rate</name>
 100                 <key>samp_rate</key>
 101                 <value>samp_rate</value>
 102                 <type>real</type>
 103         </param>
 104         <param>
 105                 <name>Low Cutoff Freq</name>
 106                 <key>low_cutoff_freq</key>
 107                 <type>real</type>
 108         </param>
 109         <param>
 110                 <name>High Cutoff Freq</name>
 111                 <key>high_cutoff_freq</key>
 112                 <type>real</type>
 113         </param>
 114         <param>
 115                 <name>Transition Width</name>
 116                 <key>width</key>
 117                 <type>real</type>
 118         </param>
 119         <param>
 120                 <name>Window</name>
 121                 <key>window</key>
 122                 <type>enum</type>
 123                 <option>
 124                         <name>Hamming</name>
 125                         <key>WIN_HAMMING</key>
 126                 </option>
 127                 <option>
 128                         <name>Hann</name>
 129                         <key>WIN_HANN</key>
 130                 </option>
 131                 <option>
 132                         <name>Blackman</name>
 133                         <key>WIN_BLACKMAN</key>
 134                 </option>
 135                 <option>
 136                         <name>Rectangular</name>
 137                         <key>WIN_RECTANGULAR</key>
 138                 </option>
 139                 <option>
 140                         <name>Kaiser</name>
 141                         <key>WIN_KAISER</key>
 142                 </option>
 143         </param>
 144         <param>
 145                 <name>Beta</name>
 146                 <key>beta</key>
 147                 <value>6.76</value>
 148                 <type>real</type>
 149         </param>
 150         <sink>
 151                 <name>in</name>
 152                 <type>$type.input</type>
 153         </sink>
 154         <source>
 155                 <name>out</name>
 156                 <type>$type.output</type>
 157         </source>
 158         <doc>
 159 This filter is a convenience wrapper for an fir filter and a firdes taps generating function.
 160
 161 Sample rate, cutoff frequency, and transition width are in Hertz.
 162
 163 The beta paramater only applies to the Kaiser window.
 164         </doc>
 165 </block>