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#
# 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
import threading
import numpy
import time
#######################################################################################
## Probe: Function
#######################################################################################
class probe_function(gr.hier_block2, threading.Thread):
"""
The thread polls the function for values and writes to a message source.
"""
def __init__(self, probe_callback, probe_rate):
#init hier block
gr.hier_block2.__init__(
self, 'probe_function',
gr.io_signature(0, 0, 0),
gr.io_signature(1, 1, gr.sizeof_float),
)
self._probe_callback = probe_callback
self.set_probe_rate(probe_rate)
#create message source
message_source = gr.message_source(gr.sizeof_float, 1)
self._msgq = message_source.msgq()
#connect
self.connect(message_source, self)
#setup thread
threading.Thread.__init__(self)
self.setDaemon(True)
self.start()
def run(self):
"""
Infinite polling loop.
"""
while True:
time.sleep(1.0/self._probe_rate)
arr = numpy.array(self._probe_callback(), numpy.float32)
msg = gr.message_from_string(arr.tostring(), 0, gr.sizeof_float, 1)
self._msgq.insert_tail(msg)
def set_probe_rate(self, probe_rate):
self._probe_rate = probe_rate
class _probe_base(gr.hier_block2):
def __init__(self, probe_block, probe_callback, probe_rate):
#init hier block
gr.hier_block2.__init__(
self, 'probe',
gr.io_signature(1, 1, probe_block.input_signature().sizeof_stream_items()[0]),
gr.io_signature(1, 1, gr.sizeof_float),
)
probe_function_block = probe_function(probe_callback, probe_rate)
#forward callbacks
self.set_probe_rate = probe_function_block.set_probe_rate
#connect
self.connect(self, probe_block)
self.connect(probe_function_block, self)
#######################################################################################
## Probe: Average Magnitude Squared
#######################################################################################
class _probe_avg_mag_sqrd_base(_probe_base):
def __init__(self, threshold, alpha, probe_rate):
#create block
probe_block = self._probe_block_contructor[0](threshold, alpha)
#forward callbacks
self.set_alpha = probe_block.set_alpha
self.set_threshold = probe_block.set_threshold
#init
_probe_base.__init__(self, probe_block, probe_block.level, probe_rate)
class probe_avg_mag_sqrd_c(_probe_avg_mag_sqrd_base): _probe_block_contructor = (gr.probe_avg_mag_sqrd_c,)
class probe_avg_mag_sqrd_f(_probe_avg_mag_sqrd_base): _probe_block_contructor = (gr.probe_avg_mag_sqrd_f,)
#######################################################################################
## Probe: Density
#######################################################################################
class probe_density_b(_probe_base):
def __init__(self, alpha, probe_rate):
#create block
probe_block = gr.probe_density_b(alpha)
#forward callbacks
self.set_alpha = probe_block.set_alpha
#init
_probe_base.__init__(self, probe_block, probe_block.density, probe_rate)
#######################################################################################
## Probe: MPSK SNR
#######################################################################################
class probe_mpsk_snr_c(_probe_base):
def __init__(self, type, alpha, probe_rate):
"""
Type can be "snr", "signal_mean", or "noise_variance"
"""
#create block
probe_block = gr.probe_mpsk_snr_c(alpha)
#forward callbacks
self.set_alpha = probe_block.set_alpha
#init
_probe_base.__init__(self, probe_block, getattr(probe_block, type), probe_rate)
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