• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: Component on top of a driver?
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Component on top of a driver?


  • Subject: Re: Component on top of a driver?
  • From: Jeff Moore <email@hidden>
  • Date: Wed, 15 Jun 2005 14:37:34 -0700

In theory, you could accomplish this by writing a user-land driver (see <CoreAudio/AudioHardwarePlugIn.h>) that creates a virtual device that is implemented by using the HAL's API to forward everything to another device.

On Jun 14, 2005, at 11:54 PM, Christof Faller wrote:

Dear list,

I am developing an algorithm which converts 2-channel stereo signals
into multi-channel audio signals. For example, a stereo signal is converted
into 8 channels for playing back over 8 loudspeakers arranged on a line.
The goal is to play back stereo signals over more loudspeakers in order
to create a more impressive stereo image and extend the sweet spot.


Now my question:
Is it possible to write something like a component operating right on
top of a device driver. The goal would be that one could use any
stereo-based program (e.g. iTunes), which would "see" a stereo devices,
but effectively my algorithm just before the real device driver would
generate more channels. For example this could work such that in the
audio control panel every multi-channel devices would also be visible
as a stereo devices (with my algorithm linked in).


Can this be done transparently, such that any existing stereo application
could access multi-channel devices through my driver, despite of the
fact that the application supports only stereo?


--

Jeff Moore
Core Audio
Apple


_______________________________________________ Do not post admin requests to the list. They will be ignored. Coreaudio-api mailing list (email@hidden) Help/Unsubscribe/Update your Subscription: This email sent to email@hidden
References: 
 >Component on top of a driver? (From: Christof Faller <email@hidden>)

  • Prev by Date: Re: Example playing and recording in memory
  • Next by Date: audio sync problem
  • Previous by thread: Component on top of a driver?
  • Next by thread: audio sync problem
  • Index(es):
    • Date
    • Thread