diff options
| author | Ben Reynwar <ben@reynwar.net> | 2013-03-07 23:06:08 -0700 |
|---|---|---|
| committer | Ben Reynwar <ben@reynwar.net> | 2013-03-07 23:06:08 -0700 |
| commit | b841288cfb261da28746c4b3aaa7a1dfc078ebfd (patch) | |
| tree | fb4bf432ba1f23d3b6a86345e8ad76ed18b21636 /gr-blocks/python/blocks/stream_to_vector_decimator.py | |
| parent | 45127424b4b7252dfc6d20c91709e1536497f97c (diff) | |
blocks: Enabling uninstalled python imports.
Diffstat (limited to 'gr-blocks/python/blocks/stream_to_vector_decimator.py')
| -rw-r--r-- | gr-blocks/python/blocks/stream_to_vector_decimator.py | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gr-blocks/python/blocks/stream_to_vector_decimator.py b/gr-blocks/python/blocks/stream_to_vector_decimator.py new file mode 100644 index 0000000000..c32ae6fce2 --- /dev/null +++ b/gr-blocks/python/blocks/stream_to_vector_decimator.py @@ -0,0 +1,106 @@ +# +# Copyright 2008 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 + +try: + from gnuradio import blocks +except ImportError: + import blocks_swig as blocks + +class stream_to_vector_decimator(gr.hier_block2): + """ + Convert the stream to a vector, decimate the vector stream to achieve the vector rate. + """ + + def __init__(self, item_size, sample_rate, vec_rate, vec_len): + """ + Create the block chain. + + Args: + item_size: the number of bytes per sample + sample_rate: the rate of incoming samples + vec_rate: the rate of outgoing vectors (same units as sample_rate) + vec_len: the length of the outgoing vectors in items + """ + self._vec_rate = vec_rate + self._vec_len = vec_len + self._sample_rate = sample_rate + + gr.hier_block2.__init__(self, "stream_to_vector_decimator", + gr.io_signature(1, 1, item_size), # Input signature + gr.io_signature(1, 1, item_size*vec_len)) # Output signature + + s2v = blocks.stream_to_vector(item_size, vec_len) + self.one_in_n = blocks.keep_one_in_n(item_size*vec_len, 1) + self._update_decimator() + self.connect(self, s2v, self.one_in_n, self) + + def set_sample_rate(self, sample_rate): + """ + Set the new sampling rate and update the decimator. + + Args: + sample_rate: the new rate + """ + self._sample_rate = sample_rate + self._update_decimator() + + def set_vec_rate(self, vec_rate): + """ + Set the new vector rate and update the decimator. + + Args: + vec_rate: the new rate + """ + self._vec_rate = vec_rate + self._update_decimator() + + def set_decimation(self, decim): + """ + Set the decimation parameter directly. + + Args: + decim: the new decimation + """ + self._decim = max(1, int(round(decim))) + self.one_in_n.set_n(self._decim) + + def _update_decimator(self): + self.set_decimation(self._sample_rate/self._vec_len/self._vec_rate) + + def decimation(self): + """ + Returns the actual decimation. + """ + return self._decim + + def sample_rate(self): + """ + Returns configured sample rate. + """ + return self._sample_rate + + def frame_rate(self): + """ + Returns actual frame rate + """ + return self._sample_rate/self._vec_len/self._decim |