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#!/usr/bin/env python
#
# Copyright 2014 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
from __future__ import print_function
from __future__ import absolute_import
from __future__ import unicode_literals
import numpy
from gnuradio import gr, blocks
# Must use absolute import here because this file is not installed as part
# of the module
from gnuradio.fec import extended_encoder
from gnuradio.fec import extended_decoder
class map_bb(gr.sync_block):
def __init__(self, bitmap):
gr.sync_block.__init__(
self,
name = "map_bb",
in_sig = [numpy.int8],
out_sig = [numpy.int8])
self.bitmap = bitmap
def work(self, input_items, output_items):
output_items[0][:] = [self.bitmap[x] for x in input_items[0]]
return len(output_items[0])
class _qa_helper(gr.top_block):
def __init__(self, data_size, enc, dec, threading):
gr.top_block.__init__(self, "_qa_helper")
self.puncpat = puncpat = '11'
self.enc = enc
self.dec = dec
self.data_size = data_size
self.threading = threading
self.ext_encoder = extended_encoder(enc, threading=self.threading, puncpat=self.puncpat)
self.ext_decoder= extended_decoder(dec, threading=self.threading, ann=None,
puncpat=self.puncpat, integration_period=10000)
self.src = blocks.vector_source_b(data_size*[0, 1, 2, 3, 5, 7, 9, 13, 15, 25, 31, 45, 63, 95, 127], False)
self.unpack = blocks.unpack_k_bits_bb(8)
self.map = map_bb([-1, 1])
self.to_float = blocks.char_to_float(1)
self.snk_input = blocks.vector_sink_b()
self.snk_output = blocks.vector_sink_b()
self.connect(self.src, self.unpack, self.ext_encoder)
self.connect(self.ext_encoder, self.map, self.to_float)
self.connect(self.to_float, self.ext_decoder)
self.connect(self.unpack, self.snk_input)
self.connect(self.ext_decoder, self.snk_output)
if __name__ == '__main__':
frame_size = 30
enc = fec.dummy_encoder_make(frame_size*8)
#enc = fec.repetition_encoder_make(frame_size*8, 3)
dec = fec.dummy_decoder.make(frame_size*8)
tb = _qa_helper(10*frame_size, enc, dec, None)
tb.run()
errs = 0
for i,o in zip(tb.snk_input.data(), tb.snk_output.data()):
if i-o != 0:
errs += 1
if errs == 0:
print("Decoded properly")
else:
print("Problem Decoding")
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