fft cut test

grc/CMakeLists.txt

@@ -24,5 +24,6 @@ install(FILES
     crfa_rds_decoder.xml
     crfa_max_freq.xml
     crfa_smooth_vectors.xml
-    crfa_stream_selector.xml DESTINATION share/gnuradio/grc/blocks
+    crfa_stream_selector.xml
+    crfa_vector_cutter.xml DESTINATION share/gnuradio/grc/blocks
 )

grc/crfa_vector_cutter.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0"?>
+<block>
+  <name>vector_cutter</name>
+  <key>crfa_vector_cutter</key>
+  <category>[crfa]</category>
+  <import>import crfa</import>
+  <make>crfa.vector_cutter($insize, $outsize, $cutpoint)</make>
+  <!-- Make one 'param' node for every Parameter you want settable from the GUI.
+       Sub-nodes:
+       * name
+       * key (makes the value accessible as $keyname, e.g. in the make node)
+       * type -->
+  <callback>set_cutpoint($cutpoint);</callback>
+  <param>
+    <name>insize</name>
+    <key>insize</key>
+    <value>2048</value>
+    <type>int</type>
+  </param>
+  <param>
+    <name>outsize</name>
+    <key>outsize</key>
+    <value>1024</value>
+    <type>int</type>
+  </param>
+  <param>
+    <name>cutpoint</name>
+    <key>cutpoint</key>
+    <value>512</value>
+    <type>int</type>
+  </param>
+
+  <sink>
+    <name>in</name>
+    <type>complex</type>
+    <vlen>$insize</vlen>
+  </sink>
+
+  <source>
+    <name>out</name>
+    <type>complex</type>
+    <vlen>$outsize</vlen>
+  </source>
+</block>

python/CMakeLists.txt

@@ -38,7 +38,8 @@ GR_PYTHON_INSTALL(
     max_freq.py
     smooth_vectors.py
     chart.py
-    stream_selector.py DESTINATION ${GR_PYTHON_DIR}/crfa
+    stream_selector.py
+    vector_cutter.py DESTINATION ${GR_PYTHON_DIR}/crfa
 )
 
 ########################################################################

python/__init__.py

@@ -39,4 +39,5 @@ from max_freq import max_freq
 from smooth_vectors import smooth_vectors
 from chart import Chart
 from stream_selector import stream_selector
+from vector_cutter import vector_cutter
 #

python/vector_cutter.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# 
+# Copyright 2017 <+YOU OR YOUR COMPANY+>.
+# 
+# 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.
+# 
+
+import numpy as np
+from gnuradio import gr
+import code
+
+class vector_cutter(gr.sync_block):
+    """
+    docstring for block vector_cutter
+    """
+    def __init__(self, insize=2048,outsize=1024,cutpoint=512):
+        gr.sync_block.__init__(self,
+            name="vector_cutter",
+            in_sig=[(np.complex64,insize)],
+            out_sig=[(np.complex64,outsize)])
+	    
+	self.cutpoint=cutpoint
+	self.insize=insize
+	self.outsize=outsize
+
+    def set_cutpoint(self, cutpoint=None):
+      print("cutpoint set to  %i"%cutpoint)
+      if cutpoint is not None:
+	      if isinstance(cutpoint, float) or isinstance(cutpoint, int):
+		      self.cutpoint=cutpoint
+	      else:
+		      self.cutpoint = int(cutpoint)
+    def work(self, input_items, output_items):
+        in0 = input_items[0]
+        out = output_items[0]
+        # <+signal processing here+>
+        #out[:] = in0[512:1536]
+	for i,in_vec in enumerate(in0):
+	  out[i]=in_vec[self.cutpoint:self.cutpoint+self.outsize]
+	#out = in0[512:1536]
+        #code.interact(local=locals())
+        #out[0] = in0[0][512:1536]
+        #out[1] = in0[1][512:1536]
+        return len(output_items[0])
+