Re: Recognizing iSight as audio input device?
Re: Recognizing iSight as audio input device?
- Subject: Re: Recognizing iSight as audio input device?
- From: Jeff Moore <email@hidden>
- Date: Fri, 24 Feb 2006 16:45:16 -0800
According to the code for AudioRingBuffer::CheckTimeBounds, it
returns kAudioRingBufferError_WayAhead when the requested range isn't
currently in the ring buffer.
I'd imagine that this implies that the input device isn't filling the
ring buffer up for some reason.
On Feb 24, 2006, at 3:56 PM, Stephen Shaw wrote:
So I've managed to track it down to the Fetch() call inside of
::OutputProc(), in the Fetch it calls CheckTimeBounds() which is
returning an error 'kAudioRingBufferError_WayAhead'. At this time I'm
not certain how it's getting in this state since it doesn't happen
with
any other of my input devices.
-Stephen
-----Original Message-----
From: Stephen Shaw
Sent: Friday, February 24, 2006 3:12 PM
To: 'CoreAudio API'
Cc: 'email@hidden'
Subject: RE: Recognizing iSight as audio input device?
Strange, I'll dig deeper,
Here's an update on what I've tried so far:
3 different external firewire iSight
2 different firewire cables
1 powermac G5 duel proc.
1 Intel iMac
Xcode 2.2
Xcode 2.2.1
Downloading the example src from developer.apple.com, fresh on both
macs
The built in mic on the iMac works fine.
With the iSights, I get about a second of audio and then a hum, or
silence.
-Stephen
On Feb 24, 2006, at 12:46 pm, Jeff More wrote:
I just downloaded the ComplexPlayThru sample code from our website and
it seemed to work just fine with my iSight. I got a nice feedback loop
between it and my PowerBook's speakers. It worked correctly even
when it
was selected as the default input device in the Sound Prefs.
I think you're going to need to do a little digging here. The fact
that
there aren't any errors anywhere and the fact that you do record "a
slight humming noise" make it seem like the IO process is working
correctly, You are just ending up with the wrong data.
It could imply that your iSight is broken. Does it work correctly with
iChat or any other apps?
--
Jeff Moore
Core Audio
Apple
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