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#!/usr/bin/env python
# Copyright 2012 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 time
import itertools
from gnuradio import gr, gr_unittest
try: import pmt
except: from gruel import pmt
import digital_swig as digital
from utils import tagged_streams
class qa_ts_insert_zeros (gr_unittest.TestCase):
def test_one(self):
n_packets = 10
packet_length = 1000
packets = [[i]*packet_length for i in range(1, n_packets+1)]
tagname = "packet_length"
data, tags = tagged_streams.packets_to_vectors(packets, tagname)
tb = gr.top_block()
src = gr.vector_source_c(data, False, 1, tags)
rate_in = 16000
rate_out = 48000
ratio = float(rate_out) / rate_in
throttle1 = gr.throttle(gr.sizeof_gr_complex, rate_in)
insert_zeros = digital.ts_insert_zeros_cc(tagname)
throttle2 = gr.throttle(gr.sizeof_gr_complex, rate_out)
head = gr.head(gr.sizeof_gr_complex, int(n_packets * packet_length * ratio*2))
snk = gr.vector_sink_c()
tb.connect(src, throttle1, insert_zeros, throttle2, head, snk)
tb.run()
data = snk.data()
state = 1
pos = 0
last_non_zero = 0
for i, d in enumerate(data):
if d != 0:
last_non_zero = i
if pos == 0:
if (d == state):
pos = pos + 1
elif (d != 0):
raise ValueError("Invalid")
elif pos > 0:
if (d != state):
raise ValueError("Invalid")
pos = pos + 1
if pos == packet_length:
state += 1
pos = 0
min_ratio = ratio-1
max_ratio = ratio+1
self.assertEqual(state-1, n_packets)
self.assertTrue(last_non_zero > min_ratio*packet_length*n_packets)
self.assertTrue(last_non_zero < max_ratio*packet_length*n_packets)
if __name__ == '__main__':
gr_unittest.run(qa_ts_insert_zeros, "qa_ts_insert_zeros.xml")
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