Lib/test/test_linuxaudiodev.py

   1 from test.test_support import verbose, findfile, TestFailed, TestSkipped
   2
   3 import errno
   4 import fcntl
   5 import linuxaudiodev
   6 import os
   7 import sys
   8 import select
   9 import sunaudio
  10 import time
  11 import audioop
  12
  13 SND_FORMAT_MULAW_8 = 1
  14
  15 def play_sound_file(path):
  16     fp = open(path, 'r')
  17     size, enc, rate, nchannels, extra = sunaudio.gethdr(fp)
  18     data = fp.read()
  19     fp.close()
  20
  21     if enc != SND_FORMAT_MULAW_8:
  22         print "Expect .au file with 8-bit mu-law samples"
  23         return
  24
  25     try:
  26         a = linuxaudiodev.open('w')
  27     except linuxaudiodev.error, msg:
  28         if msg[0] in (errno.EACCES, errno.ENODEV, errno.EBUSY):
  29             raise TestSkipped, msg
  30         raise TestFailed, msg
  31
  32     # convert the data to 16-bit signed
  33     data = audioop.ulaw2lin(data, 2)
  34
  35     # set the data format
  36     if sys.byteorder == 'little':
  37         fmt = linuxaudiodev.AFMT_S16_LE
  38     else:
  39         fmt = linuxaudiodev.AFMT_S16_BE
  40
  41     # at least check that these methods can be invoked
  42     a.bufsize()
  43     a.obufcount()
  44     a.obuffree()
  45     a.getptr()
  46     a.fileno()
  47
  48     # set parameters based on .au file headers
  49     a.setparameters(rate, 16, nchannels, fmt)
  50     a.write(data)
  51     a.flush()
  52     a.close()
  53
  54 def test_errors():
  55     a = linuxaudiodev.open("w")
  56     size = 8
  57     fmt = linuxaudiodev.AFMT_U8
  58     rate = 8000
  59     nchannels = 1
  60     try:
  61         a.setparameters(-1, size, nchannels, fmt)
  62     except ValueError, msg:
  63         print msg
  64     try:
  65         a.setparameters(rate, -2, nchannels, fmt)
  66     except ValueError, msg:
  67         print msg
  68     try:
  69         a.setparameters(rate, size, 3, fmt)
  70     except ValueError, msg:
  71         print msg
  72     try:
  73         a.setparameters(rate, size, nchannels, 177)
  74     except ValueError, msg:
  75         print msg
  76     try:
  77         a.setparameters(rate, size, nchannels, linuxaudiodev.AFMT_U16_LE)
  78     except ValueError, msg:
  79         print msg
  80     try:
  81         a.setparameters(rate, 16, nchannels, fmt)
  82     except ValueError, msg:
  83         print msg
  84
  85 def test():
  86     play_sound_file(findfile('audiotest.au'))
  87     test_errors()
  88
  89 test()