[wdmaudiodev] Re: AVStream Mixer Problems
- From: "John D. Farmer" <johndfarmer@xxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 24 Aug 2004 14:13:01 -0700
I've got the controls all set up, now when I go to the Sounds and Audio Devices
I see a 'Volume Control' mixer added to my Playback volume controls. When I
bring up the 'Volume Control' mixer all the sliders on the mixer are disabled.
I have implemented the KSEVENT_CONTROL_CHANGE event for these nodes, and I have
implemented the KSPROPSETID_Audio properties (KSPROPERTY_AUDIO_VOLUME_LEVEL
and KSPROPERTY_AUDIO_CPU_RESOURCES) for the volume nodes, as well as the
Get/Set Property Handler for KSPROPERTY_AUDIO_VOLUME_LEVEL (I keep a value of
the current volume, and give it back for the Get, and for the Set I check the
requested volume level and if it is within range I save that value off as the
current volume value and return success). I have implemented the Get Property
Handler on the KSPROPERTY_AUDIO_CPU_RESOURCES.
I have also implemented the KSPROPERTY_AUDIO_MUTE Property and the Get/Set
Property Handlers for the Volume Control mixer (again I save off the state of
the mute and give it back for the Get and I change the current mute value and
return success for the Set), but when I click on the check box in the Volume
Control mixer it nothing seems to happen. I can see the change happening in KS
Studio after I've made the change, but I can still hear sound out of my device.
So what do I need to do to enable the sliders on the Volume Control mixer and
get my mute to work?
Thanks,
John Farmer
----- Original Message -----
From: DJ Sisolak
To: wdmaudiodev@xxxxxxxxxxxxx
Sent: Friday, August 20, 2004 1:27 PM
Subject: [wdmaudiodev] Re: AVStream Mixer Problems
OK, I misunderstood your original message to read that the volume and mute
controls were all before the SUM node. So it would appear that for some reason
the controls themselves are not currently functioning or at least not sending
responses to requests, or perhaps there is a problem in the BASIC_SUPPORT
responses. There could be quite a few reasons for this. You stated below that:
I assume once I implement the Master Volume mixer that the controls on the
'Device volume' and 'Speaker settings' sections will be enabled. So how do I
implement the Master Volume mixer?
Does this mean that you have not yet implemented the controls?
Unlike portcls drivers, avstream topologies are not separated from the
streaming. They are part of the same "filter factory". Creation of a filter
from the filter factory would instantiate the streaming and topology for that
filter.
Thanks,
DJ Sisolak
Microsoft Corp.
This posting is provided "AS IS" with no warranties, and confers no rights.
------------------------------------------------------------------------------
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of John D. Farmer
Sent: Friday, August 20, 2004 11:27 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: AVStream Mixer Problems
I've tried a number of different topologies, as I mentioned before I looked
at the topologies of other soundcards and this seems to be the most correct:
static
KSTOPOLOGY_CONNECTION MiniportConnections[] =
{ //FromNode------------------FromPin-----ToNode----------------------ToPin
{ KSFILTER_NODE, 1, KSNODE_SPEAKER_VOLUME, 1 },
{ KSNODE_SPEAKER_VOLUME, 0, KSNODE_SPEAKER_MUTE, 1 },
{ KSNODE_SPEAKER_MUTE, 0, KSNODE_ANALOG_OUT_SUM, 1 },
{ KSFILTER_NODE, 3, KSNODE_MICROPHONE_VOLUME, 1 },
{ KSNODE_MICROPHONE_VOLUME, 0, KSNODE_MICROPHONE_MUTE, 1 },
{ KSNODE_MICROPHONE_MUTE, 0, KSNODE_ANALOG_OUT_SUM, 2 },
{ KSNODE_ANALOG_OUT_SUM, 0, KSNODE_MASTER_VOLUME, 1 },
{ KSNODE_MASTER_VOLUME, 0, KSNODE_MASTER_MUTE, 1 },
{ KSNODE_MASTER_MUTE, 0, KSFILTER_NODE, 0 }
};
and looks something like this in KS Studio:
===================================
1 0-|| Vol -> Mute \ / - || - {} 0
3 -{} || Vol -> Mute -- Sum -> Volume -> Mute/ || -o 2
===================================
----- Original Message -----
From: DJ Sisolak
To: wdmaudiodev@xxxxxxxxxxxxx
Sent: Friday, August 20, 2004 11:12 AM
Subject: [wdmaudiodev] Re: AVStream Mixer Problems
Hello John,
I am guessing the problem you are seeing is due to the placement of the SUM
node in your topology. When the topology parser in wdmaud sees this node it
assumes there is some sort of branching going on and looks downstream for
master controls. Thus if your Volume and mute controls are upstream fro this
node they would not be considered the master.
What is the exact topology you are describing?
Thanks,
DJ Sisolak
Microsoft Corp.
This posting is provided "AS IS" with no warranties, and confers no rights.
----------------------------------------------------------------------------
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of John D. Farmer
Sent: Friday, August 20, 2004 9:47 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] AVStream Mixer Problems
Greetings,
I'm creating a AVStream audio device that registers itself as a audio
playback device. When I select the device as my default playback device, I can
hear the sound and everything is fine and good. But now I am working on
implementing the audio mixer for the device (e.g. Volume, Mute, Microphone
Volume, ect).
When I open up the Sounds and Audio Devices control panel, 'Device volume'
section is grayed out as well as the buttons in the 'Speaker settings' section
on the Volume tab. When I go to the Audio tab I can access the Volume and
Advanced buttons for both my Sound playback and Sound recording. If I choose
the Volume button for Sound playback, I see my Wave, CD Audio, and SW Synth
mixers, but I seem to lack the Master Volume mixer. If I go to the properties
in Sndvol32 for my device I see "Playback" and "Recording" radio buttons.
Under playback I see the same mixers as I saw previously, and under Recording I
see no volume controls.
I assume once I implement the Master Volume mixer that the controls on the
'Device volume' and 'Speaker settings' sections will be enabled. So how do I
implement the Master Volume mixer?
I've created a simple wave topology that implements Volume, Mute, SUM, ADC
and DAC nodes for my speaker and microphone pins. When I look in KS Studio I
see my driver under the KSCATEGORY_AUDIO Filter Factories as a Audio device (or
a \wave device). I looked at other soundcards on different systems and they
also seem to have a Mixer node (or a \topology device). I assume that these
soundcard drivers are portcls drivers. When I instantiate both of these
filters they automatically connect (I've seen this behavior before in the MSVAD
sample and understand the theory of how these filters work together). So is
there a way to create a Topology Filter and a Wave Filter for my device, or
does AVStream do it a different way. I see that portcls drivers uses
PcRegisterSubDevice to register these filters but I have been unable to find
the AVStream equivalent.
Any help would be greatly appreciated.
Regards,
John Farmer
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