Re: AudioDeviceIOProc not called after AudioDeviceStart
Re: AudioDeviceIOProc not called after AudioDeviceStart
- Subject: Re: AudioDeviceIOProc not called after AudioDeviceStart
- From: Alain Mazy <email@hidden>
- Date: Tue, 06 Apr 2004 12:45:29 +0200
Hi Vincent,
No, I do not use any music player at the same time. In my app, the user is
able to use two inputs (only one at a time): an audio file or the audio-in.
Sometimes, when starting the audio-in device, the IOProc was just not called
and sometimes it was.
I say 'was' because now it is solved (well, not solved but it works):
I have changed one line inside the IOProc and now it is always called !!!
Of course, I guess next time I will change another line, my problem will
come back again but that will be another story.
Alain.
Le 4/6/04 9:25 AM, + A. Le Flanchec ; <email@hidden> a icrit :
>
Salut Alain,
>
>
Do you use some music sequence and music player at the same time ? I think I
>
do have the same kind of problems when running an AudioDevice for input,
>
while running a music sequence at the same time (for recording while
>
listening to prviously recorded music... by the way, is it the correct way
>
to do it ?). When I start the device, the IOProc used to read my audiofiles
>
and render them through a stereomixer, are not called anymore... and
>
sometimes they are. I could not find any solution, except starting the
>
device right when my app launches and never stopping it... It is very
>
strange, because I thought I could start and stop my audioDevice without
>
affectiong the music player and AUGraph running in another thread...
>
>
Tell me if you think your problem is related with mine... maybe we could
>
sort it out together !
>
>
Vincent
>
>
>
>
> 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.
>
>
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>
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>
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