[alsa-devel] Alsamixertest

[Raymond Yau]

2010/10/21 David Henningsson <david.henningsson at canonical.com>

> On 2010-10-21 06:36, Raymond Yau wrote:
> > 2010/10/4 David Henningsson<david.henningsson at canonical.com>
> >
> >>
> >>
> >> Exactly, this is a test tool that checks whether the mixer control names
> >> and dB information live up to PulseAudio's expectations. That's the
> >> tool's purpose.
> >>
> >> What's PulseAudio' s expectation ?
> >
> > PA 's developer seem expect max_dB of all HDA codec are 0dB
> >
> > Your alsamixertest program does not test any dB range above 0dB
>
> That's correct, I don't really know how to deal with that, and I'm not
> sure how PA deals with that either. I assume it goes above 0 dB on one
> of the volume controls when a user wants it to.
>
>
alsamixertest-48.11 does allow user to specify a negative step to allow test
volume over 0dB , but your program seem go to infinite loop




DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', '--', 'sset',
"'Master',0", '3.000000dB', 'unmute')
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', 'sget', "'Master',0")
DEBUG:root:dB = 3.000000 get 0.000000 gives pstate = {'Front Left':
{'muted': False, 'dB': 0.0, 'value': 31}, 'Front Right': {'muted': False,
'dB': 0.0, 'value': 31}}
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', '--', 'sset',
"'Master',0", '4.500000dB', 'unmute')
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', 'sget', "'Master',0")
DEBUG:root:dB = 4.500000 get 0.000000 gives pstate = {'Front Left':
{'muted': False, 'dB': 0.0, 'value': 31}, 'Front Right': {'muted': False,
'dB': 0.0, 'value': 31}}
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', '--', 'sset',
"'Master',0", '6.000000dB', 'unmute')
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', 'sget', "'Master',0")
DEBUG:root:dB = 6.000000 get 0.000000 gives pstate = {'Front Left':
{'muted': False, 'dB': 0.0, 'value': 31}, 'Front Right': {'muted': False,
'dB': 0.0, 'value': 31}}
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', '--', 'sset',
"'Master',0", '7.500000dB', 'unmute')
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', 'sget', "'Master',0")
DEBUG:root:dB = 7.500000 get 0.000000 gives pstate = {'Front Left':
{'muted': False, 'dB': 0.0, 'value': 31}, 'Front Right': {'muted': False,
'dB': 0.0, 'value': 31}}
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', '--', 'sset',
"'Master',0", '9.000000dB', 'unmute')
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', 'sget', "'Master',0")
DEBUG:root:dB = 9.000000 get 0.000000 gives pstate = {'Front Left':
{'muted': False, 'dB': 0.0, 'value': 31}, 'Front Right': {'muted': False,
'dB': 0.0, 'value': 31}}
DEBUG:root:Run subprocess: ('amixer', '-D', 'hw:0', '--', 'sset',
"'Master',0", '10.500000dB', 'unmute')