def test_bigframes(self):
""" Try to seek really far."""
rawname = join(TEST_DATA_DIR, 'test.wav')
a = Sndfile(rawname, 'r')
try:
try:
a.seek(2 ** 60)
raise Exception(
"Seek really succeded ! This should not happen")
except IOError as e:
pass
finally:
a.close()
def test_rw(self):
"""Test read/write pointers for seek."""
ofilename = join(TEST_DATA_DIR, 'test.wav')
rfd, fd, cfilename = open_tmp_file('rwseektest.wav')
try:
ref = Sndfile(ofilename, 'r')
test = Sndfile(fd, 'rw', format=ref.format,
channels=ref.channels, samplerate=ref.samplerate)
n = 1024
rbuff = ref.read_frames(n, dtype = np.int16)
test.write_frames(rbuff)
tbuff = test.read_frames(n, dtype = np.int16)
assert_array_equal(rbuff, tbuff)
# Test seeking both read and write pointers
test.seek(0, 0)
test.write_frames(rbuff)
tbuff = test.read_frames(n, dtype = np.int16)
assert_array_equal(rbuff, tbuff)
# Test seeking only read pointer
rbuff1 = rbuff.copy()
rbuff2 = rbuff1 * 2 + 1
rbuff2.clip(-30000, 30000)
test.seek(0, 0, 'r')
test.write_frames(rbuff2)
tbuff1 = test.read_frames(n, dtype = np.int16)
try:
tbuff2 = test.read_frames(n, dtype = np.int16)
except IOError, e:
msg = "write pointer was updated in read seek !"
msg += "\n(msg is %s)" % e
raise AssertionError(msg)
assert_array_equal(rbuff1, tbuff1)
assert_array_equal(rbuff2, tbuff2)
if np.all(rbuff2 == tbuff1):
raise AssertionError("write pointer was updated"\
" in read seek !")
# Test seeking only write pointer
rbuff3 = rbuff1 * 2 - 1
rbuff3.clip(-30000, 30000)
test.seek(0, 0, 'rw')
test.seek(n, 0, 'w')
test.write_frames(rbuff3)
tbuff1 = test.read_frames(n, np.int16)
try:
assert_array_equal(tbuff1, rbuff1)
except AssertionError:
raise AssertionError("read pointer was updated in write seek !")
try:
tbuff3 = test.read_frames(n, np.int16)
except IOError, e:
msg = "read pointer was updated in write seek !"
msg += "\n(msg is %s)" % e
raise AssertionError(msg)
def test_float_frames(self):
""" Check nframes can be a float"""
rfd, fd, cfilename = open_tmp_file('pysndfiletest.wav')
try:
# Open the file for writing
format = Format('wav', 'pcm16')
a = Sndfile(fd, 'rw', format, channels=1, samplerate=22050)
tmp = np.random.random_integers(-100, 100, 1000)
tmp = tmp.astype(np.short)
a.write_frames(tmp)
a.seek(0)
a.sync()
ctmp = a.read_frames(1e2, dtype=np.short)
a.close()
finally:
close_tmp_file(rfd, cfilename)
def test_simple(self):
ofilename = join(TEST_DATA_DIR, 'test.wav')
# Open the test file for reading
a = Sndfile(ofilename, 'r')
nframes = a.nframes
buffsize = 1024
buffsize = min(nframes, buffsize)
# First, read some frames, go back, and compare buffers
buff = a.read_frames(buffsize)
a.seek(0)
buff2 = a.read_frames(buffsize)
assert_array_equal(buff, buff2)
a.close()
# Now, read some frames, go back, and compare buffers
# (check whence == 1 == SEEK_CUR)
a = Sndfile(ofilename, 'r')
a.read_frames(buffsize)
buff = a.read_frames(buffsize)
a.seek(-buffsize, 1)
buff2 = a.read_frames(buffsize)
assert_array_equal(buff, buff2)
a.close()
# Now, read some frames, go back, and compare buffers
# (check whence == 2 == SEEK_END)
a = Sndfile(ofilename, 'r')
buff = a.read_frames(nframes)
a.seek(-buffsize, 2)
buff2 = a.read_frames(buffsize)
assert_array_equal(buff[-buffsize:], buff2)
