Merge branch 'dfsg-orig'

[debian/gnuradio] / gnuradio-core / src / python / gnuradio / blks2impl / pfb_decimator.py

diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/pfb_decimator.py b/gnuradio-core/src/python/gnuradio/blks2impl/pfb_decimator.py
new file mode 100644 (file)
index 0000000..176d047
--- /dev/null
+++ b/gnuradio-core/src/python/gnuradio/blks2impl/pfb_decimator.py
@@ -0,0 +1,49 @@
+#!/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_decimator_ccf(gr.hier_block2):
+    '''
+    Make a Polyphase Filter decimator (complex in, complex out, floating-point taps)
+
+    This simplifies the interface by allowing a single input stream to connect to this block.
+    It will then output a stream that is the decimated output stream.
+    '''
+    def __init__(self, decim, taps, channel=0):
+       gr.hier_block2.__init__(self, "pfb_decimator_ccf",
+                               gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
+                               gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
+
+        self._decim = decim
+        self._taps = taps
+        self._channel = channel
+
+        self.s2ss = gr.stream_to_streams(gr.sizeof_gr_complex, self._decim)
+        self.pfb = gr.pfb_decimator_ccf(self._decim, self._taps, self._channel)
+
+        self.connect(self, self.s2ss)
+
+        for i in xrange(self._decim):
+            self.connect((self.s2ss,i), (self.pfb,i))
+
+        self.connect(self.pfb, self)