diff options
Diffstat (limited to 'gnuradio-core/src')
| -rw-r--r-- | gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am | 1 | ||||
| -rw-r--r-- | gnuradio-core/src/python/gnuradio/blks2impl/stream_to_vector_decimator.py | 80 |
2 files changed, 81 insertions, 0 deletions
diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am b/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am index 934326d8f..0a8df50cb 100644 --- a/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am +++ b/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am @@ -55,6 +55,7 @@ grblkspython_PYTHON = \ qam256.py \ rational_resampler.py \ standard_squelch.py \ + stream_to_vector_decimator.py \ wfm_rcv.py \ wfm_rcv_pll.py \ wfm_tx.py diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/stream_to_vector_decimator.py b/gnuradio-core/src/python/gnuradio/blks2impl/stream_to_vector_decimator.py new file mode 100644 index 000000000..58b6b68b4 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/stream_to_vector_decimator.py @@ -0,0 +1,80 @@ +# +# 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 + +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. + @param item_size the number of bytes per sample + @param sample_rate the rate of incoming samples + @param vec_rate the rate of outgoing vectors (same units as sample_rate) + @param 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_decimator_block", + gr.io_signature(1, 1, item_size), # Input signature + gr.io_signature(1, 1, item_size*vec_len)) # Output signature + + s2v = gr.stream_to_vector(item_size, vec_len) + self.one_in_n = gr.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. + @param 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. + @param vec_rate the new rate + """ + self._vec_rate = vec_rate + self._update_decimator() + + def _update_decimator(self): + self._decim = max(1, int(self._sample_rate/self._vec_len/self._vec_rate)) + self.one_in_n.set_n(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 |