Re: default output start & stop
Re: default output start & stop
- Subject: Re: default output start & stop
- From: David Duncan <email@hidden>
- Date: Sun, 5 Jan 2003 13:17:42 -0500
On Sunday, January 5, 2003, at 12:55 PM, papi wrote:
New to core audio -- still pretty green at C++.
The DefaultAudioOutput example project's TestDefaultAU() function has
some
code that starts and stops a simple sine wave render. Can someone
explain
in further detail what exactly is happening here? (I've copied the
snippet below.)
Starting the audio unit here...
verify_noerr(AudioOutputUnitStart(theOutputUnit));
Sleeping the current thread for 5 seconds (the audio is played on a
separate thread) usleep() is a BSD call.
usleep (5 * 1000 * 1000); // sleep for 5 seconds
And stop the audio unit here...
verify_noerr(AudioOutputUnitStop(theOutputUnit));
That is literally all this code is doing. Now, the thread that is
feeding the audio may only play 5 seconds worth of sound regardless, I
have not looked at the source code for TestDefaultAU() so I don't know.
But if your looking for more clues, it would be more useful to look at
the render callback that is being installed on the output unit.
--
Reality is what, when you stop believing in it, doesn't go away.
Failure is not an option. It is a privilege reserved for those who try.
David Duncan
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