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Have a look at this documentation: http://developer.apple.com/documentation/DeviceDrivers/Conceptual/WritingAudioDrivers/ImplementDriver/chapter_4_section_5.html Which includes the reason for the library split up. Brett. tahome izwah wrote: > A KEXT is a kernel extension, an ".a" file is a static library. Kernel > extensions extend the functionality of the OS kernel by adding useful > features to it on the system level. Libraries provide code and > functionality directly to end user programs without exposing the > source code. You will generally not want to write a KEXT except for > very special purposes. > > The KEXT you'll need will have to pose as an audio device. If you load > it (type "man kextload" in Terminal) you can select it as default > audio device in the Sound control/prefs panel. If you want to capture > system audio you need an application that records audio through a > given device and a KEXT that re-routes system audio to your app. Take > a look at the AudioReflectorDriver project/KEXT, or the 3rd party > SoundFlower KEXT that is available on the 'net. > > HTH > --th > > 2008/12/31 James Udo Ludtke <email@hidden>: >> I posted earlier as "Using the default output as an input to an audio unit." >> After trying alternate approaches, which have their shortcomings, I am now >> ready to take the advise that creating a driver may be the best answer. >> >> I studied the SampleAudioDriver project, which can be compiled into 2 >> targets: Target 1 is "SampleAudioDriver.kext"; target 2 is >> "libAudioFloatLib". >> >> I can compile both targets without errors Unfortunately, the >> SampleAudioDriver project has no ReadMe file. So, how do I test and use the >> "SampleAudioDriver" and the "libAudioFloatLib.a" which I compiled? >> >> I have searched Apple documentation and the Internet without coming up with >> any useful information on how to use custom kexts or ".a" library files. I >> need to call the driver from within my code, and I like to install the >> driver or library as part of my application installation--hopefully without >> an installer--I think drag and drop installation is much more user friendly. >> >> Anyhow, to get started, I need to learn: >> 1. Where is a custom kext best used. Where is a custom library best used. >> 2. Reading the source code, how can I tell the method and arguments, which >> must be used (from within my code) to access the kext or library. >> 3. From any example code (preferred) or documentation, how to use a kext or >> library, including where the call format can be found in the source file of >> the kext code. >> >> Where should I look? >> >> James > _______________________________________________ > 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 -- ---------------------------------------------------------- *Brett George* - email@hidden Apogee Electronics - Software Engineering Manager T: +1 310.584.5435 (direct) T: +1 310.584.9394 (company) F: +1 310.584.9385 Please consider the environment before printing this e-mail. ---------------------------------------------------------- The content of this email is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify your system manager. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. If you are the named addressee of this email note that redistribution or discussion of its contents without permission is strictly prohibited. _______________________________________________ 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
|>How to use the SampleAudioDriver (From: James Udo Ludtke <email@hidden>)|
|>Re: How to use the SampleAudioDriver (From: "tahome izwah" <email@hidden>)|
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