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#!/usr/bin/env python
#
# Copyright 2013 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.
#
import random
from gnuradio import gr, gr_unittest, blocks
import pmt
class qa_repack_bits_bb (gr_unittest.TestCase):
def setUp (self):
self.tb = gr.top_block ()
def tearDown (self):
self.tb = None
def test_001_simple (self):
""" Very simple test, 2 bits -> 1 """
src_data = (0b11, 0b01, 0b10)
expected_data = (0b1, 0b1, 0b1, 0b0, 0b0, 0b1)
k = 2
l = 1
src = blocks.vector_source_b(src_data, False, 1)
repack = blocks.repack_bits_bb(k, l)
sink = blocks.vector_sink_b()
self.tb.connect(src, repack, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_data)
def test_002_three (self):
""" 8 -> 3 """
src_data = (0b11111101, 0b11111111, 0b11111111)
expected_data = (0b101,) + (0b111,) * 7
k = 8
l = 3
src = blocks.vector_source_b(src_data, False, 1)
repack = blocks.repack_bits_bb(k, l)
sink = blocks.vector_sink_b()
self.tb.connect(src, repack, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_data)
def test_003_lots_of_bytes (self):
""" Lots and lots of bytes, multiple packer stages """
src_data = tuple([random.randint(0, 255) for x in range(3*5*7*8 * 10)])
src = blocks.vector_source_b(src_data, False, 1)
repack1 = blocks.repack_bits_bb(8, 3)
repack2 = blocks.repack_bits_bb(3, 5)
repack3 = blocks.repack_bits_bb(5, 7)
repack4 = blocks.repack_bits_bb(7, 8)
sink = blocks.vector_sink_b()
self.tb.connect(src, repack1, repack2, repack3, repack4, sink)
self.tb.run ()
self.assertEqual(sink.data(), src_data)
def test_004_three_with_tags (self):
""" 8 -> 3 """
src_data = (0b11111101, 0b11111111)
expected_data = (0b101,) + (0b111,) * 4 + (0b001,)
k = 8
l = 3
tag_name = "len"
tag = gr.tag_t()
tag.offset = 0
tag.key = pmt.string_to_symbol(tag_name)
tag.value = pmt.from_long(len(src_data))
src = blocks.vector_source_b(src_data, False, 1, (tag,))
repack = blocks.repack_bits_bb(k, l, tag_name)
sink = blocks.vector_sink_b()
self.tb.connect(src, repack, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_data)
try:
out_tag = sink.tags()[0]
except:
self.assertFail()
self.assertEqual(out_tag.offset, 0)
self.assertEqual(pmt.symbol_to_string(out_tag.key), tag_name)
self.assertEqual(pmt.to_long(out_tag.value), len(expected_data))
def test_005_three_with_tags_trailing (self):
""" 3 -> 8, trailing bits """
src_data = (0b101,) + (0b111,) * 4 + (0b001,)
expected_data = (0b11111101, 0b11111111)
k = 3
l = 8
tag_name = "len"
tag = gr.tag_t()
tag.offset = 0
tag.key = pmt.string_to_symbol(tag_name)
tag.value = pmt.from_long(len(src_data))
src = blocks.vector_source_b(src_data, False, 1, (tag,))
repack = blocks.repack_bits_bb(k, l, tag_name, True)
sink = blocks.vector_sink_b()
self.tb.connect(src, repack, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_data)
try:
out_tag = sink.tags()[0]
except:
self.assertFail()
self.assertEqual(out_tag.offset, 0)
self.assertEqual(pmt.symbol_to_string(out_tag.key), tag_name)
self.assertEqual(pmt.to_long(out_tag.value), len(expected_data))
if __name__ == '__main__':
gr_unittest.run(qa_repack_bits_bb, "qa_repack_bits_bb.xml")
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