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test_mseed_special_issues.py
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/
test_mseed_special_issues.py
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# -*- coding: utf-8 -*-
from obspy import UTCDateTime, Stream, Trace, read
from obspy.core.util import NamedTemporaryFile
from obspy.core.util.attribdict import AttribDict
from obspy.core.util.decorator import skipIf
from obspy.mseed import util
from obspy.mseed.core import readMSEED, writeMSEED
from obspy.mseed.headers import clibmseed, PyFile_FromFile
from obspy.mseed.msstruct import _MSStruct
from struct import unpack
import ctypes as C
import numpy as np
import os
import sys
import unittest
import warnings
# some Python version don't support negative timestamps
NO_NEGATIVE_TIMESTAMPS = False
try:
UTCDateTime(-50000)
except:
NO_NEGATIVE_TIMESTAMPS = True
class MSEEDSpecialIssueTestCase(unittest.TestCase):
"""
"""
def setUp(self):
# Directory where the test files are located
self.path = os.path.dirname(__file__)
# mseed steim compression is big endian
if sys.byteorder == 'little':
self.swap = 1
else:
self.swap = 0
def test_invalidRecordLength(self):
"""
An invalid record length should raise an exception.
"""
npts = 6000
tempfile = NamedTemporaryFile().name
np.random.seed(815) # make test reproducable
data = np.random.randint(-1000, 1000, npts).astype('int32')
st = Stream([Trace(data=data)])
# Writing should fail with invalid record lengths.
# Not a power of 2.
self.assertRaises(ValueError, writeMSEED, st, tempfile, format="MSEED",
reclen=1000)
# Too small.
self.assertRaises(ValueError, writeMSEED, st, tempfile, format="MSEED",
reclen=8)
# Not a number.
self.assertRaises(ValueError, writeMSEED, st, tempfile, format="MSEED",
reclen='A')
os.remove(tempfile)
def test_invalidEncoding(self):
"""
An invalid encoding should raise an exception.
"""
npts = 6000
tempfile = NamedTemporaryFile().name
np.random.seed(815) # make test reproducable
data = np.random.randint(-1000, 1000, npts).astype('int32')
st = Stream([Trace(data=data)])
# Writing should fail with invalid record lengths.
# Wrong number.
self.assertRaises(ValueError, writeMSEED, st, tempfile, format="MSEED",
encoding=2)
# Wrong Text.
self.assertRaises(ValueError, writeMSEED, st, tempfile, format="MSEED",
encoding='FLOAT_64')
os.remove(tempfile)
def test_ctypesArgtypes(self):
"""
Test that ctypes argtypes are set for type checking
"""
ArgumentError = C.ArgumentError
cl = clibmseed
args = [C.pointer(C.pointer(C.c_int())), 'a', 1, 1.5, 1, 0, 0, 0, 0]
self.assertRaises(ArgumentError, cl.ms_readtraces, *args)
self.assertRaises(TypeError, cl.ms_readtraces, *args[:-1])
self.assertRaises(ArgumentError, cl.ms_readmsr_r, *args)
self.assertRaises(TypeError, cl.ms_readmsr_r, *args[:-1])
self.assertRaises(ArgumentError, cl.mst_printtracelist, *args[:5])
self.assertRaises(ArgumentError, PyFile_FromFile, *args[:5])
self.assertRaises(ArgumentError, cl.ms_detect, *args[:4])
args.append(1) # 10 argument function
self.assertRaises(ArgumentError, cl.mst_packgroup, *args)
args = ['hallo'] # one argument functions
self.assertRaises(ArgumentError, cl.msr_starttime, *args)
self.assertRaises(ArgumentError, cl.msr_endtime, *args)
self.assertRaises(ArgumentError, cl.mst_init, *args)
self.assertRaises(ArgumentError, cl.mst_free, *args)
self.assertRaises(ArgumentError, cl.mst_initgroup, *args)
self.assertRaises(ArgumentError, cl.mst_freegroup, *args)
self.assertRaises(ArgumentError, cl.msr_init, *args)
def test_brokenLastRecord(self):
"""
Test if Libmseed is able to read files with broken last record. Use
both methods, readMSTracesViaRecords and readMSTraces
"""
file = os.path.join(self.path, "data", "brokenlastrecord.mseed")
# independent reading of the data
data_string = open(file, 'rb').read()[128:] # 128 Bytes header
data = util._unpackSteim2(data_string, 5980, swapflag=self.swap,
verbose=0)
# test readMSTraces
data_record = readMSEED(file)[0].data
np.testing.assert_array_equal(data, data_record)
def test_oneSampleOverlap(self):
"""
Both methods readMSTraces and readMSTracesViaRecords should recognize a
single sample overlap.
"""
# create a stream with one sample overlapping
trace1 = Trace(data=np.zeros(1000))
trace2 = Trace(data=np.zeros(10))
trace2.stats.starttime = UTCDateTime(999)
st = Stream([trace1, trace2])
# write into MSEED
tempfile = NamedTemporaryFile().name
writeMSEED(st, tempfile, format="MSEED")
# read it again
new_stream = readMSEED(tempfile)
self.assertEquals(len(new_stream), 2)
# clean up
os.remove(tempfile)
def test_bugWriteReadFloat32SEEDWin32(self):
"""
Test case for issue #64.
"""
# create stream object
data = np.array([395.07809448, 395.0782, 1060.28112793, -1157.37487793,
-1236.56237793, 355.07028198, -1181.42175293],
dtype=np.float32)
st = Stream([Trace(data=data)])
tempfile = NamedTemporaryFile().name
writeMSEED(st, tempfile, format="MSEED")
# read temp file directly without libmseed
bin_data = open(tempfile, "rb").read()
bin_data = np.array(unpack(">7f", bin_data[56:84]))
np.testing.assert_array_equal(data, bin_data)
# read via ObsPy
st2 = readMSEED(tempfile)
os.remove(tempfile)
# test results
np.testing.assert_array_equal(data, st2[0].data)
@skipIf(NO_NEGATIVE_TIMESTAMPS,
'times before 1970 are not supported on this operation system')
def test_writeWithDateTimeBefore1970(self):
"""
Write an stream via libmseed with a datetime before 1970.
This test depends on the platform specific localtime()/gmtime()
function.
"""
# create trace
tr = Trace(data=np.empty(1000))
tr.stats.starttime = UTCDateTime("1969-01-01T00:00:00")
# write file
tempfile = NamedTemporaryFile().name
writeMSEED(Stream([tr]), tempfile, format="MSEED")
# read again
stream = readMSEED(tempfile)
os.remove(tempfile)
stream.verify()
def test_invalidDataType(self):
"""
Writing data of type int64 and int16 are not supported.
"""
npts = 6000
tempfile = NamedTemporaryFile().name
np.random.seed(815) # make test reproducable
# int64
data = np.random.randint(-1000, 1000, npts).astype('int64')
st = Stream([Trace(data=data)])
self.assertRaises(Exception, st.write, tempfile, format="MSEED")
# int8
data = np.random.randint(-1000, 1000, npts).astype('int8')
st = Stream([Trace(data=data)])
self.assertRaises(Exception, st.write, tempfile, format="MSEED")
os.remove(tempfile)
def test_writeWrongEncoding(self):
"""
Test to write a floating point mseed file with encoding STEIM1.
An exception should be raised.
"""
file = os.path.join(self.path, "data", \
"BW.BGLD.__.EHE.D.2008.001.first_record")
tempfile = NamedTemporaryFile().name
# Read the data and convert them to float
st = read(file)
st[0].data = st[0].data.astype('float32') + .5
# Type is not consistent float32 cannot be compressed with STEIM1,
# therefore a exception should be raised.
self.assertRaises(Exception, st.write, tempfile, format="MSEED",
encoding=10)
os.remove(tempfile)
def test_writeWrongEncodingViaMseedStats(self):
"""
Test to write a floating point mseed file with encoding STEIM1 with the
encoding set in stats.mseed.encoding.
This will just raise a warning.
"""
file = os.path.join(self.path, "data", \
"BW.BGLD.__.EHE.D.2008.001.first_record")
tempfile = NamedTemporaryFile().name
# Read the data and convert them to float
st = read(file)
st[0].data = st[0].data.astype('float32') + .5
# Type is not consistent float32 cannot be compressed with STEIM1,
# therefore a warning should be raised.
self.assertEqual(st[0].stats.mseed.encoding, 'STEIM1')
with warnings.catch_warnings(record=True):
warnings.simplefilter('error', UserWarning)
self.assertRaises(UserWarning, st.write, tempfile, format="MSEED")
os.remove(tempfile)
def test_wrongRecordLengthAsArgument(self):
"""
Specifying a wrong record length should raise an error.
"""
file = os.path.join(self.path, 'data', 'libmseed',
'float32_Float32_bigEndian.mseed')
self.assertRaises(Exception, read, file, reclen=4096)
def test_readQualityInformationWarns(self):
"""
Reading the quality information while reading the data files is no more
supported in newer obspy.mseed versions. Check that a warning is
raised.
Similar functionality is included in obspy.mseed.util.
"""
timingqual = os.path.join(self.path, 'data', 'timingquality.mseed')
with warnings.catch_warnings(record=True):
warnings.simplefilter('error', DeprecationWarning)
# This should not raise a warning.
read(timingqual)
# This should warn.
self.assertRaises(DeprecationWarning, read, timingqual,
quality=True)
def test_readWithMissingBlockette010(self):
"""
Reading a Full/Mini-SEED w/o blockette 010 but blockette 008.
"""
# 1 - Mini-SEED
file = os.path.join(self.path, 'data', 'blockette008.mseed')
tr = read(file)[0]
self.assertEqual('BW.PART..EHZ', tr.id)
self.assertEqual(1642, tr.stats.npts)
# 2 - full SEED
file = os.path.join(self.path, 'data',
'RJOB.BW.EHZ.D.300806.0000.fullseed')
tr = read(file)[0]
self.assertEqual('BW.RJOB..EHZ', tr.id)
self.assertEqual(412, tr.stats.npts)
def test_issue160(self):
"""
Tests issue #160.
Reading the header of SEED file.
"""
file = os.path.join(self.path, 'data',
'BW.BGLD.__.EHE.D.2008.001.first_10_records')
tr_one = read(file)[0]
tr_two = read(file, headonly=True)[0]
ms = AttribDict({'record_length': 512, 'encoding': 'STEIM1',
'filesize': 5120, 'dataquality': 'D',
'number_of_records': 10, 'byteorder': '>'})
for tr in tr_one, tr_two:
self.assertEqual('BW.BGLD..EHE', tr.id)
self.assertEqual(ms, tr.stats.mseed)
self.assertEqual(4120, tr.stats.npts)
self.assertEqual(UTCDateTime(2008, 1, 1, 0, 0, 20, 510000),
tr.stats.endtime)
def test_issue217(self):
"""
Tests issue #217.
Reading a MiniSEED file without sequence numbers and a record length of
1024.
"""
file = os.path.join(self.path, 'data',
'reclen_1024_without_sequence_numbers.mseed')
tr = read(file)[0]
ms = AttribDict({'record_length': 1024, 'encoding': 'STEIM1',
'filesize': 2048, 'dataquality': 'D',
'number_of_records': 2, 'byteorder': '>'})
self.assertEqual('XX.STF1..HHN', tr.id)
self.assertEqual(ms, tr.stats.mseed)
self.assertEqual(932, tr.stats.npts)
self.assertEqual(UTCDateTime(2007, 5, 31, 22, 45, 46, 720000),
tr.stats.endtime)
def test_issue296(self):
"""
Tests issue #296.
"""
tempfile = NamedTemporaryFile().name
# 1 - transform to np.float64 values
st = read()
for tr in st:
tr.data = tr.data.astype('float64')
# write a single trace automatically detecting encoding
st[0].write(tempfile, format="MSEED")
# write a single trace automatically detecting encoding
st.write(tempfile, format="MSEED")
# write a single trace with encoding 5
st[0].write(tempfile, format="MSEED", encoding=5)
# write a single trace with encoding 5
st.write(tempfile, format="MSEED", encoding=5)
# 2 - transform to np.float32 values
st = read()
for tr in st:
tr.data = tr.data.astype('float32')
# write a single trace automatically detecting encoding
st[0].write(tempfile, format="MSEED")
# write a single trace automatically detecting encoding
st.write(tempfile, format="MSEED")
# write a single trace with encoding 4
st[0].write(tempfile, format="MSEED", encoding=4)
# write a single trace with encoding 4
st.write(tempfile, format="MSEED", encoding=4)
# 3 - transform to np.int32 values
st = read()
for tr in st:
tr.data = tr.data.astype('int32')
# write a single trace automatically detecting encoding
st[0].write(tempfile, format="MSEED")
# write a single trace automatically detecting encoding
st.write(tempfile, format="MSEED")
# write a single trace with encoding 3
st[0].write(tempfile, format="MSEED", encoding=3)
# write the whole stream with encoding 3
st.write(tempfile, format="MSEED", encoding=3)
# write a single trace with encoding 10
st[0].write(tempfile, format="MSEED", encoding=10)
# write the whole stream with encoding 10
st.write(tempfile, format="MSEED", encoding=10)
# write a single trace with encoding 11
st[0].write(tempfile, format="MSEED", encoding=11)
# write the whole stream with encoding 11
st.write(tempfile, format="MSEED", encoding=11)
# 4 - transform to np.int16 values
st = read()
for tr in st:
tr.data = tr.data.astype('int16')
# write a single trace automatically detecting encoding
st[0].write(tempfile, format="MSEED")
# write a single trace automatically detecting encoding
st.write(tempfile, format="MSEED")
# write a single trace with encoding 1
st[0].write(tempfile, format="MSEED", encoding=1)
# write the whole stream with encoding 1
st.write(tempfile, format="MSEED", encoding=1)
# 5 - transform to ASCII values
st = read()
for tr in st:
tr.data = tr.data.astype('|S1')
# write a single trace automatically detecting encoding
st[0].write(tempfile, format="MSEED")
# write a single trace automatically detecting encoding
st.write(tempfile, format="MSEED")
# write a single trace with encoding 0
st[0].write(tempfile, format="MSEED", encoding=0)
# write the whole stream with encoding 0
st.write(tempfile, format="MSEED", encoding=0)
# cleanup
os.remove(tempfile)
def test_issue289(self):
"""
Tests issue #289.
Reading MiniSEED using start-/endtime outside of data should result in
an empty Stream object.
"""
# 1
file = os.path.join(self.path, 'data', 'steim2.mseed')
st = read(file, starttime=UTCDateTime() - 10, endtime=UTCDateTime())
self.assertEqual(len(st), 0)
# 2
file = os.path.join(self.path, 'data', 'fullseed.mseed')
st = read(file, starttime=UTCDateTime() - 10, endtime=UTCDateTime())
self.assertEqual(len(st), 0)
def test_issue312(self):
"""
Tests issue #312
The blkt_link struct was defined wrong.
"""
filename = os.path.join(self.path, 'data',
'BW.BGLD.__.EHE.D.2008.001.first_10_records')
# start and endtime
ms = _MSStruct(filename)
ms.read(-1, 0, 1, 0)
blkt_link = ms.msr.contents.blkts.contents
# The first blockette usually begins after 48 bytes. In the test file
# it does.
self.assertEqual(blkt_link.blktoffset, 48)
# The first blockette is blockette 1000 in this file.
self.assertEqual(blkt_link.blkt_type, 1000)
# Only one blockette.
self.assertEqual(blkt_link.next_blkt, 0)
# Blockette data is 8 bytes - 4 bytes for the blockette header.
self.assertEqual(blkt_link.blktdatalen, 4)
del ms
def test_issue272(self):
"""
Tests issue #272
Option headonly should not read the actual waveform data.
"""
filename = os.path.join(self.path, 'data',
'BW.BGLD.__.EHE.D.2008.001.first_10_records')
# everything
st = read(filename)
self.assertEqual(st[0].stats.npts, 4120)
self.assertEqual(len(st[0].data), 4120)
# headers only
st = read(filename, headonly=True)
self.assertEqual(st[0].stats.npts, 4120)
self.assertEqual(len(st[0].data), 0)
def test_issue325(self):
"""
Tests issue #325: Use selection with non default dataquality flag.
"""
filename = os.path.join(self.path, 'data', 'dataquality-m.mseed')
# 1 - read all
st = read(filename)
self.assertEquals(len(st), 3)
t1 = st[0].stats.starttime
t2 = st[0].stats.endtime
# 2 - select full time window
st2 = read(filename, starttime=t1, endtime=t2)
self.assertEquals(len(st2), 3)
self.assertEquals(st, st2)
# 3 - use selection
st2 = read(filename, starttime=t1, endtime=t2, sourcename='*.*.*.*')
self.assertEquals(len(st2), 3)
self.assertEquals(st, st2)
st2 = read(filename, starttime=t1, endtime=t2, sourcename='*')
self.assertEquals(len(st2), 3)
self.assertEquals(st, st2)
# 4 - selection without times
st2 = read(filename, sourcename='*.*.*.*')
self.assertEquals(len(st2), 3)
self.assertEquals(st, st2)
st2 = read(filename, sourcename='*')
self.assertEquals(len(st2), 3)
self.assertEquals(st, st2)
def test_issue332(self):
"""
Tests issue #332
Writing traces with wrong encoding in stats should raise only a user
warning.
"""
tempfile = NamedTemporaryFile().name
st = read()
tr = st[0]
tr.data = tr.data.astype('float64') + .5
tr.stats.mseed = {'encoding': 0}
with warnings.catch_warnings(record=True):
warnings.simplefilter('error', UserWarning)
self.assertRaises(UserWarning, st.write, tempfile, format="MSEED")
# clean up
os.remove(tempfile)
def test_issue341(self):
"""
Tests issue #341
Read/write of MiniSEED files with huge sampling rates/delta values.
"""
tempfile = NamedTemporaryFile().name
# 1 - sampling rate
st = read()
tr = st[0]
tr.stats.sampling_rate = 1000000000.0
tr.write(tempfile, format="MSEED")
# read again
st = read(tempfile)
self.assertEquals(st[0].stats.sampling_rate, 1000000000.0)
# 2 - delta
st = read()
tr = st[0]
tr.stats.delta = 10000000.0
tr.write(tempfile, format="MSEED")
# read again
st = read(tempfile)
self.assertAlmostEquals(st[0].stats.delta, 10000000.0, 0)
# clean up
os.remove(tempfile)
def suite():
return unittest.makeSuite(MSEEDSpecialIssueTestCase, 'test')
if __name__ == '__main__':
unittest.main(defaultTest='suite')