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Make AlsaMixer work on hosts without a mixer named 'Master'

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This commit is contained in:
Stein Magnus Jodal 2010-05-03 23:52:38 +02:00
parent d70d60deed
commit 894060b4e4
1 changed files with 13 additions and 1 deletions
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14
mopidy/mixers/alsa.py
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@ -1,7 +1,10 @@
import alsaaudio
import logging
from mopidy.mixers import BaseMixer
logger = logging.getLogger('mopidy.mixers.alsa')
class AlsaMixer(BaseMixer):
"""
Mixer which uses the Advanced Linux Sound Architecture (ALSA) to control
@ -10,7 +13,16 @@ class AlsaMixer(BaseMixer):
def __init__(self, *args, **kwargs):
super(AlsaMixer, self).__init__(*args, **kwargs)
self._mixer = alsaaudio.Mixer()
# A mixer named 'Master' does not always exist, so we fall back to
# using 'PCM'. If this turns out to be a bad solution, we should make
# it possible to override with a setting.
self._mixer = None
for mixer_name in (u'Master', u'PCM'):
if mixer_name in alsaaudio.mixers():
logger.info(u'Mixer in use: %s', mixer_name)
self._mixer = alsaaudio.Mixer(mixer_name)
break
assert self._mixer is not None
def _get_volume(self):
return self._mixer.getvolume()[0]