Re: Problems when changing sample rate on a aggregate device
Re: Problems when changing sample rate on a aggregate device
- Subject: Re: Problems when changing sample rate on a aggregate device
- From: Stéphane Letz <email@hidden>
- Date: Wed, 5 Dec 2007 22:21:35 +0100
Message: 2
Date: Wed, 5 Dec 2007 11:47:35 -0800
From: Jeff Moore <email@hidden>
Subject: Re: Problems when changing sample rate on a aggregate device
To: CoreAudio API <email@hidden>
Message-ID: <email@hidden>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed; delsp=yes
Which device is the master device
On Dec 5, 2007, at 6:12 AM, Stéphane Letz wrote:
- Mac Pro Tiger 10.5.1 using an aggregate device that combines
built in input and built-in output :
- when changing SR in AMS *on the aggregate device*, notification
listener is called, stream converter are updated (that is no error)
but device *stops* working ...
Define "stops working".
IO callback not called anymore.
- when changing SR in AMS *on the built-in output device* (that
is subdevice of aggregate one), notification listener is *not*
called...
Sounds like the built-in output device is not the master device in the
aggregate, which would make this a normal situation as the sample rate
of an aggregate is the sample rate of the master device.
Ok i'll check again. But what is supposed to happen is the SR of a
sub-device that is not the master is changed?
So they are several strange things: device stops working, and
notification listener *not* called when SR change is done on one of
the aggregate subdevice. Should I fill a bug report here?
So far, I haven't seen anything that resembles a bug.
Except that when I try exactly what you describe with HALLab, I don't
see playback stopping. I see the file player in HALLab stop, handle
the rate change (or stream layout change or whatever), and then
restart. I never see it just stop.
Ok I was not precise enough. Actually:
- changing SR from AMS on one sub-device of the aggregate device, no
change in HALLAB
- using the file player tool in HALLAB, changing SR from AMS on one
sub-device of the aggregate device, file player stopping....
Thanks
Stephane Letz _______________________________________________
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