Re: Multiple data sources and kAudioStreamPropertyTerminalType
Re: Multiple data sources and kAudioStreamPropertyTerminalType
- Subject: Re: Multiple data sources and kAudioStreamPropertyTerminalType
- From: Edward Peterlin <email@hidden>
- Date: Fri, 8 Apr 2005 16:52:16 -0700
You might provide some feedback in the GUI about what the driver for
each device says about it's terminal type to help guide the user when
picking. But I would definitely let the user choose since they should
know which devices they have that meet your app's criteria. That will
allow your app to work with the largest set of devices possible.
I definitely hear that...the difference is in our case that we're
selling a hardware+software combo and the hardware's physical connector
is either a miniplug or RCA style line in. I'm already displaying a
list to the user but was using the terminal type to filter out sources
that our hardware obviously couldn't be connected to (e.g. internal
microphone, digital input, etc.). We're writing an educational product
for children and have been trying to keep the setup as simple as
possible. We leave the drivers that report generic types or return
unsupported errors in the list to to be safe.
I'm waiting for successful property change notifications on the audio
device but after switching to the external Line-In data source the
terminal type on the albook is still indicating INPUT_MICROPHONE...but
I know it's not the microphone since the actual audio data on the
stream is coming from the line in jack. I had expected the terminal
type to be EXTERNAL_ANALOG_CONNECTOR or perhaps EXTERNAL_LINE_CONNECTOR
like the G5 tower builtin audio device.
I'll go ahead and whittle down a test case for the albook to put in bug
reporter. In the meantime I'll try to sneak that device back in based
upon comparing it by name. It doesn't appear the data source name
returned by the DataSourceNameForIDCFString property is being changed
with the system-preferred language (10.3.8).
thanks for the help,
Edward Peterlin
BIOPAC Systems, Inc.
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