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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.
#
from gnuradio import gr, gr_unittest
import parse_file_metadata
import blocks_swig as blocks
import pmt
import os, math
def sig_source_c(samp_rate, freq, amp, N):
t = map(lambda x: float(x)/samp_rate, xrange(N))
y = map(lambda x: amp*math.cos(2.*math.pi*freq*x) + \
1j*amp*math.sin(2.*math.pi*freq*x), t)
return y
class test_file_metadata(gr_unittest.TestCase):
def setUp(self):
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def test_001(self):
N = 1000
outfile = "test_out.dat"
detached = False
samp_rate = 200000
key = pmt.pmt_intern("samp_rate")
val = pmt.pmt_from_double(samp_rate)
extras = pmt.pmt_make_dict()
extras = pmt.pmt_dict_add(extras, key, val)
extras_str = pmt.pmt_serialize_str(extras)
data = sig_source_c(samp_rate, 1000, 1, N)
src = gr.vector_source_c(data)
fsnk = blocks.file_meta_sink(gr.sizeof_gr_complex, outfile,
samp_rate, 1,
blocks.GR_FILE_FLOAT, True,
1000000, extras_str, detached)
fsnk.set_unbuffered(True)
self.tb.connect(src, fsnk)
self.tb.run()
fsnk.close()
handle = open(outfile, "rb")
header_str = handle.read(parse_file_metadata.HEADER_LENGTH)
if(len(header_str) == 0):
self.assertFalse()
try:
header = pmt.pmt_deserialize_str(header_str)
except RuntimeError:
self.assertFalse()
print header
info = parse_file_metadata.parse_header(header, False)
extra_str = handle.read(info["extra_len"])
self.assertGreater(len(extra_str), 0)
handle.close()
try:
extra = pmt.pmt_deserialize_str(extra_str)
except RuntimeError:
self.assertFalse()
extra_info = parse_file_metadata.parse_extra_dict(extra, info, False)
self.assertEqual(info['rx_rate'], samp_rate)
self.assertEqual(pmt.pmt_to_double(extra_info['samp_rate']), samp_rate)
# Test file metadata source
src.rewind()
fsrc = blocks.file_meta_source(outfile, False)
vsnk = gr.vector_sink_c()
tsnk = gr.tag_debug(gr.sizeof_gr_complex, "QA")
ssnk = gr.vector_sink_c()
self.tb.disconnect(src, fsnk)
self.tb.connect(fsrc, vsnk)
self.tb.connect(fsrc, tsnk)
self.tb.connect(src, ssnk)
self.tb.run()
# Test to make sure tags with 'samp_rate' and 'rx_rate' keys
# were generated and received correctly.
tags = tsnk.current_tags()
for t in tags:
if(pmt.pmt_eq(t.key, pmt.pmt_intern("samp_rate"))):
self.assertEqual(pmt.pmt_to_double(t.value), samp_rate)
elif(pmt.pmt_eq(t.key, pmt.pmt_intern("rx_rate"))):
self.assertEqual(pmt.pmt_to_double(t.value), samp_rate)
# Test that the data portion was extracted and received correctly.
self.assertComplexTuplesAlmostEqual(vsnk.data(), ssnk.data(), 5)
os.remove(outfile)
def test_002(self):
N = 1000
outfile = "test_out.dat"
outfile_hdr = "test_out.dat.hdr"
detached = True
samp_rate = 200000
key = pmt.pmt_intern("samp_rate")
val = pmt.pmt_from_double(samp_rate)
extras = pmt.pmt_make_dict()
extras = pmt.pmt_dict_add(extras, key, val)
extras_str = pmt.pmt_serialize_str(extras)
data = sig_source_c(samp_rate, 1000, 1, N)
src = gr.vector_source_c(data)
fsnk = blocks.file_meta_sink(gr.sizeof_gr_complex, outfile,
samp_rate, 1,
blocks.GR_FILE_FLOAT, True,
1000000, extras_str, detached)
fsnk.set_unbuffered(True)
self.tb.connect(src, fsnk)
self.tb.run()
fsnk.close()
# Open detached header for reading
handle = open(outfile_hdr, "rb")
header_str = handle.read(parse_file_metadata.HEADER_LENGTH)
if(len(header_str) == 0):
self.assertFalse()
try:
header = pmt.pmt_deserialize_str(header_str)
except RuntimeError:
self.assertFalse()
info = parse_file_metadata.parse_header(header, False)
extra_str = handle.read(info["extra_len"])
self.assertGreater(len(extra_str), 0)
handle.close()
try:
extra = pmt.pmt_deserialize_str(extra_str)
except RuntimeError:
self.assertFalse()
extra_info = parse_file_metadata.parse_extra_dict(extra, info, False)
self.assertEqual(info['rx_rate'], samp_rate)
self.assertEqual(pmt.pmt_to_double(extra_info['samp_rate']), samp_rate)
# Test file metadata source
src.rewind()
fsrc = blocks.file_meta_source(outfile, False, detached, outfile_hdr)
vsnk = gr.vector_sink_c()
tsnk = gr.tag_debug(gr.sizeof_gr_complex, "QA")
ssnk = gr.vector_sink_c()
self.tb.disconnect(src, fsnk)
self.tb.connect(fsrc, vsnk)
self.tb.connect(fsrc, tsnk)
self.tb.connect(src, ssnk)
self.tb.run()
# Test to make sure tags with 'samp_rate' and 'rx_rate' keys
# were generated and received correctly.
tags = tsnk.current_tags()
for t in tags:
if(pmt.pmt_eq(t.key, pmt.pmt_intern("samp_rate"))):
self.assertEqual(pmt.pmt_to_double(t.value), samp_rate)
elif(pmt.pmt_eq(t.key, pmt.pmt_intern("rx_rate"))):
self.assertEqual(pmt.pmt_to_double(t.value), samp_rate)
# Test that the data portion was extracted and received correctly.
self.assertComplexTuplesAlmostEqual(vsnk.data(), ssnk.data(), 5)
os.remove(outfile)
os.remove(outfile_hdr)
if __name__ == '__main__':
gr_unittest.run(test_file_metadata, "test_file_metadata.xml")
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