| 1 | from test import test_support |
| 2 | test_support.requires('audio') |
| 3 | |
| 4 | from test.test_support import verbose, findfile, TestFailed, TestSkipped |
| 5 | |
| 6 | import errno |
| 7 | import fcntl |
| 8 | import ossaudiodev |
| 9 | import os |
| 10 | import sys |
| 11 | import select |
| 12 | import sunaudio |
| 13 | import time |
| 14 | import audioop |
| 15 | |
| 16 | # Arggh, AFMT_S16_NE not defined on all platforms -- seems to be a |
| 17 | # fairly recent addition to OSS. |
| 18 | try: |
| 19 | from ossaudiodev import AFMT_S16_NE |
| 20 | except ImportError: |
| 21 | if sys.byteorder == "little": |
| 22 | AFMT_S16_NE = ossaudiodev.AFMT_S16_LE |
| 23 | else: |
| 24 | AFMT_S16_NE = ossaudiodev.AFMT_S16_BE |
| 25 | |
| 26 | |
| 27 | SND_FORMAT_MULAW_8 = 1 |
| 28 | |
| 29 | def read_sound_file(path): |
| 30 | fp = open(path, 'rb') |
| 31 | size, enc, rate, nchannels, extra = sunaudio.gethdr(fp) |
| 32 | data = fp.read() |
| 33 | fp.close() |
| 34 | |
| 35 | if enc != SND_FORMAT_MULAW_8: |
| 36 | print "Expect .au file with 8-bit mu-law samples" |
| 37 | return |
| 38 | |
| 39 | # Convert the data to 16-bit signed. |
| 40 | data = audioop.ulaw2lin(data, 2) |
| 41 | return (data, rate, 16, nchannels) |
| 42 | |
| 43 | |
| 44 | def play_sound_file(data, rate, ssize, nchannels): |
| 45 | try: |
| 46 | dsp = ossaudiodev.open('w') |
| 47 | except IOError, msg: |
| 48 | if msg[0] in (errno.EACCES, errno.ENODEV, errno.EBUSY): |
| 49 | raise TestSkipped, msg |
| 50 | raise TestFailed, msg |
| 51 | |
| 52 | # at least check that these methods can be invoked |
| 53 | dsp.bufsize() |
| 54 | dsp.obufcount() |
| 55 | dsp.obuffree() |
| 56 | dsp.getptr() |
| 57 | dsp.fileno() |
| 58 | |
| 59 | # set parameters based on .au file headers |
| 60 | dsp.setparameters(AFMT_S16_NE, nchannels, rate) |
| 61 | t1 = time.time() |
| 62 | print "playing test sound file..." |
| 63 | dsp.write(data) |
| 64 | dsp.close() |
| 65 | t2 = time.time() |
| 66 | print "elapsed time: %.1f sec" % (t2-t1) |
| 67 | |
| 68 | def test_setparameters(dsp): |
| 69 | # Two configurations for testing: |
| 70 | # config1 (8-bit, mono, 8 kHz) should work on even the most |
| 71 | # ancient and crufty sound card, but maybe not on special- |
| 72 | # purpose high-end hardware |
| 73 | # config2 (16-bit, stereo, 44.1kHz) should work on all but the |
| 74 | # most ancient and crufty hardware |
| 75 | config1 = (ossaudiodev.AFMT_U8, 1, 8000) |
| 76 | config2 = (AFMT_S16_NE, 2, 44100) |
| 77 | |
| 78 | for config in [config1, config2]: |
| 79 | (fmt, channels, rate) = config |
| 80 | if (dsp.setfmt(fmt) == fmt and |
| 81 | dsp.channels(channels) == channels and |
| 82 | dsp.speed(rate) == rate): |
| 83 | break |
| 84 | else: |
| 85 | raise RuntimeError("unable to set audio sampling parameters: " |
| 86 | "you must have really weird audio hardware") |
| 87 | |
| 88 | # setparameters() should be able to set this configuration in |
| 89 | # either strict or non-strict mode. |
| 90 | result = dsp.setparameters(fmt, channels, rate, False) |
| 91 | assert result == (fmt, channels, rate), \ |
| 92 | "setparameters%r: returned %r" % (config + result) |
| 93 | result = dsp.setparameters(fmt, channels, rate, True) |
| 94 | assert result == (fmt, channels, rate), \ |
| 95 | "setparameters%r: returned %r" % (config + result) |
| 96 | |
| 97 | def test_bad_setparameters(dsp): |
| 98 | |
| 99 | # Now try some configurations that are presumably bogus: eg. 300 |
| 100 | # channels currently exceeds even Hollywood's ambitions, and |
| 101 | # negative sampling rate is utter nonsense. setparameters() should |
| 102 | # accept these in non-strict mode, returning something other than |
| 103 | # was requested, but should barf in strict mode. |
| 104 | fmt = AFMT_S16_NE |
| 105 | rate = 44100 |
| 106 | channels = 2 |
| 107 | for config in [(fmt, 300, rate), # ridiculous nchannels |
| 108 | (fmt, -5, rate), # impossible nchannels |
| 109 | (fmt, channels, -50), # impossible rate |
| 110 | ]: |
| 111 | (fmt, channels, rate) = config |
| 112 | result = dsp.setparameters(fmt, channels, rate, False) |
| 113 | assert result != config, \ |
| 114 | "setparameters: unexpectedly got requested configuration" |
| 115 | |
| 116 | try: |
| 117 | result = dsp.setparameters(fmt, channels, rate, True) |
| 118 | raise AssertionError("setparameters: expected OSSAudioError") |
| 119 | except ossaudiodev.OSSAudioError, err: |
| 120 | print "setparameters: got OSSAudioError as expected" |
| 121 | |
| 122 | def test(): |
| 123 | (data, rate, ssize, nchannels) = read_sound_file(findfile('audiotest.au')) |
| 124 | play_sound_file(data, rate, ssize, nchannels) |
| 125 | |
| 126 | dsp = ossaudiodev.open("w") |
| 127 | try: |
| 128 | test_setparameters(dsp) |
| 129 | |
| 130 | # Disabled because it fails under Linux 2.6 with ALSA's OSS |
| 131 | # emulation layer. |
| 132 | #test_bad_setparameters(dsp) |
| 133 | finally: |
| 134 | dsp.close() |
| 135 | |
| 136 | test() |