Re: Find out all IOProcs attached to an Audio device in a Process
Re: Find out all IOProcs attached to an Audio device in a Process
- Subject: Re: Find out all IOProcs attached to an Audio device in a Process
- From: Jeff Moore <email@hidden>
- Date: Thu, 14 Oct 2004 12:53:09 -0700
I'm a bit lost and I don't quite know what advice to give you. Can you
back up and describe what you are doing a bit more? It sounds like you
are mixing and matching things that need to be done from the kernel
(i.e. get access to all the audio from all processes) with user-space
stuff (like AUHAL).
On Oct 14, 2004, at 12:39 PM, Simon Liu wrote:
I'm trying to isolate the audio from an arbitrary (foreign) process.
Grabbing the IOProcs
gives access to the data buffers to be sent to the device. I can do
this already,
but am not sure if I have all the IOProcs. So I have also tried using
AUHAL, but
this instead gives me all the audio being sent to the device, from all
processes.
On Thu, 14 Oct 2004 12:14:44 -0700, Jeff Moore <email@hidden> wrote:
No. There is no way to get the list of IOProcs that have been added to
a particular device in a particular process. In fact the API was set
up
to keep individual IOProcs ignorant of each other as much as possible.
May I ask what it is you are trying to do? Perhaps I can offer an
alternative.
On Oct 14, 2004, at 7:45 AM, Simon Liu wrote:
Hello,
Is it possible to obtain a list of all registered IOProcs for an
audio
device?
kAudioDevicePropertyDeviceIsRunning can tell me if any IOProcs have
started. Is there a property that can help with the above?
Regards,
Simon
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Jeff Moore
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Apple
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