2010/2/24 Lennart Poettering <mznyfn@xxxxxxxxxxx>
> On Tue, 23.02.10 11:08, Clemens Ladisch (clemens@xxxxxxxxxx) wrote:
>
> >
> > Lennart Poettering wrote:
> > > On Sun, 21.02.10 12:01, Raymond Yau (superquad.vortex2@xxxxxxxxx)
> wrote:
> > > > However Simple Mixer API cannot know the subdevice number , you have
> to use
> > > > control API ( the lower level API used by Simple Mixer API )
> > >
> > > Unfortunately there is no way from the simple mixer to the lower level
> > > mixer.
>
>
> > > It would be great if the smixer would include some API that gives me a
> > > hint to which device/subdevice a specific snd_mixer_elem_t belongs to.
> >
> > Often, there is no 1:1 correspondence between mixer elements and PCM
> > devices. Only mixer controls with interface PCM (not MIXER) have (sub-)
> > device numbers, and at the moment this is used only for controls that
> > are associated with the streams of hardware-mixing-capable cards.
>
> Which are not that many, right? Not HDA at least?
>
Card hw:1 'Intel'/'HDA Intel at 0xff9f4000 irq 22'
Mixer name : 'Analog Devices AD1988'
Components : 'HDA:11d41988'
Controls : 48
Simple ctrls : 26
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 54
Front Left: Capture 39 [72%] [0.00dB] [off]
Front Right: Capture 39 [72%] [0.00dB] [off]
Simple mixer control 'Capture',1
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 54
Front Left: Capture 39 [72%] [0.00dB] [off]
Front Right: Capture 39 [72%] [0.00dB] [off]
Simple mixer control 'Capture',2
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 54
Front Left: Capture 39 [72%] [0.00dB] [off]
Front Right: Capture 39 [72%] [0.00dB] [off]
Simple mixer control 'Input Source',0
Capabilities: cenum
Items: 'Front Mic' 'Line' 'Mic' 'CD' 'Mix'
Item0: 'Mic'
Simple mixer control 'Input Source',1
Capabilities: cenum
Items: 'Front Mic' 'Line' 'Mic' 'CD' 'Mix'
Item0: 'Front Mic'
Simple mixer control 'Input Source',2
Capabilities: cenum
Items: 'Front Mic' 'Line' 'Mic' 'CD' 'Mix'
Item0: 'Front Mic'
control.28 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Capture Switch'
value.0 false
value.1 false
}
control.29 {
comment.access 'read write'
comment.type INTEGER
comment.count 2
comment.range '0 - 54'
comment.dbmin -5850
comment.dbmax 2250
iface MIXER
name 'Capture Volume'
index 1
value.0 39
value.1 39
}
control.30 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Capture Switch'
index 1
value.0 false
value.1 false
}
control.31 {
comment.access 'read write'
comment.type INTEGER
comment.count 2
comment.range '0 - 54'
comment.dbmin -5850
comment.dbmax 2250
iface MIXER
name 'Capture Volume'
index 2
value.0 39
value.1 39
}
control.32 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Capture Switch'
index 2
value.0 false
value.1 false
}
control.33 {
comment.access 'read write'
comment.type ENUMERATED
comment.count 1
comment.item.0 'Front Mic'
comment.item.1 Line
comment.item.2 Mic
comment.item.3 CD
comment.item.4 Mix
iface MIXER
name 'Input Source'
value Mic
}
control.34 {
comment.access 'read write'
comment.type ENUMERATED
comment.count 1
comment.item.0 'Front Mic'
comment.item.1 Line
comment.item.2 Mic
comment.item.3 CD
comment.item.4 Mix
iface MIXER
name 'Input Source'
index 1
value 'Front Mic'
}
control.35 {
comment.access 'read write'
comment.type ENUMERATED
comment.count 1
comment.item.0 'Front Mic'
comment.item.1 Line
comment.item.2 Mic
comment.item.3 CD
comment.item.4 Mix
iface MIXER
name 'Input Source'
index 2
value 'Front Mic'
}
>
> > Getting information about the mixer layout (like the nodes reported by
> > HDA and USB devices) is on the TODO list; the only reason it isn't being
> > implemented is lack of time.
>
> Would be great to have that.
>
> Lennart
>
>
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