Re: AudioDeviceIOProc not called after AudioDeviceStart
Re: AudioDeviceIOProc not called after AudioDeviceStart
- Subject: Re: AudioDeviceIOProc not called after AudioDeviceStart
- From: Jeff Moore <email@hidden>
- Date: Thu, 1 Apr 2004 11:49:02 -0800
That's not enough information to know what might be going astray in
your app. That sequence of calls by itself works fine if I paste them
into a command line tool. This will probably sound like a stupid
question, but how are you judging whether or not your IOProc is getting
called?
On Apr 1, 2004, at 6:07 AM, Alain Mazy wrote:
Here is a piece of code I have to start an audio device (input).
err = AudioDeviceAddPropertyListener(fInputDevice->mID, 0, TRUE,
kAudioDevicePropertyDeviceIsRunning, AudioDeviceIsRunningListenerProc,
NULL);
err = AudioDeviceAddIOProc(fInputDevice->mID,
AudioDeviceSourceInputIOProc, self);
err = AudioDeviceStart(fInputDevice->mID,
AudioDeviceSourceInputIOProc);
The PropertyListener callback is called and tells me the device is
running
but the AudioDeviceIOProc is never called. I get no error message.
Actually, this piece of code sometimes work and sometimes not. It
depends
on what the user has done before. However, the failure/success of
this code
does not depend on the creation code or startup code for the
AudioDevice
which is always the same.
An here comes the 'funniest' part: if I put a breakpoint on the first
line
and then execute the code step by step it ALWAYS work !
So what's the problem ? Timing ? Multi-thread related ? How should I
know
since the API tells me that everything is fine ?
Thanks a lot for your help.
Alain.
--
Jeff Moore
Core Audio
Apple
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