Viewing file:  test_linuxaudiodev.py (2.09 KB) -rw-r--r--
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from test import test_support
test_support.requires('audio')
from test.test_support import verbose, findfile, TestFailed, TestSkipped
import errno
import fcntl
import linuxaudiodev
import os
import sys
import select
import sunaudio
import time
import audioop
SND_FORMAT_MULAW_8 = 1
def play_sound_file(path):
fp = open(path, 'r')
size, enc, rate, nchannels, extra = sunaudio.gethdr(fp)
data = fp.read()
fp.close()
if enc != SND_FORMAT_MULAW_8:
print "Expect .au file with 8-bit mu-law samples"
return
try:
a = linuxaudiodev.open('w')
except linuxaudiodev.error, msg:
if msg[0] in (errno.EACCES, errno.ENOENT, errno.ENODEV, errno.EBUSY):
raise TestSkipped, msg
raise TestFailed, msg
# convert the data to 16-bit signed
data = audioop.ulaw2lin(data, 2)
# set the data format
if sys.byteorder == 'little':
fmt = linuxaudiodev.AFMT_S16_LE
else:
fmt = linuxaudiodev.AFMT_S16_BE
# at least check that these methods can be invoked
a.bufsize()
a.obufcount()
a.obuffree()
a.getptr()
a.fileno()
# set parameters based on .au file headers
a.setparameters(rate, 16, nchannels, fmt)
a.write(data)
a.flush()
a.close()
def test_errors():
a = linuxaudiodev.open("w")
size = 8
fmt = linuxaudiodev.AFMT_U8
rate = 8000
nchannels = 1
try:
a.setparameters(-1, size, nchannels, fmt)
except ValueError, msg:
print msg
try:
a.setparameters(rate, -2, nchannels, fmt)
except ValueError, msg:
print msg
try:
a.setparameters(rate, size, 3, fmt)
except ValueError, msg:
print msg
try:
a.setparameters(rate, size, nchannels, 177)
except ValueError, msg:
print msg
try:
a.setparameters(rate, size, nchannels, linuxaudiodev.AFMT_U16_LE)
except ValueError, msg:
print msg
try:
a.setparameters(rate, 16, nchannels, fmt)
except ValueError, msg:
print msg
def test():
play_sound_file(findfile('audiotest.au'))
test_errors()
test()
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