iOS Bluetooth input, line or speaker output
iOS Bluetooth input, line or speaker output
- Subject: iOS Bluetooth input, line or speaker output
- From: Aran Mulholland <email@hidden>
- Date: Fri, 25 Nov 2011 18:18:38 +1100
Hey List,
I know we seem a bit reserved when it comes to answers on bluetooth
but I thought I might run it past you after an entire day of crawling
the web and reading header files etc.
With the audio session one can use the
kAudioSessionProperty_OverrideCategoryEnableBluetoothInput to allow
the audio to play through and be input from a bluetooth headset. Is
there any way to only allow input from bluetooth and still output the
audio to the speaker or the headphone out? The property
kAudioSessionProperty_OverrideCategoryEnableBluetoothInput sounds like
it is just talking about input doesn't it? It's not.
I tried the "all new" Audio Session property
kAudioSessionProperty_OutputDestinations and then realised it was just
for usb (via camera kit) outputs. Pity.. this looks like the kind of
interface I want, a list of all available inputs and outputs and
routing left in the hands of the dev.
Code is below, maybe someone else will find it useful....
//get all available output destination
UInt32 size = sizeof(CFArrayRef);
CFArrayRef audioOutputRoutes;
OSStatus err =
AudioSessionGetProperty(kAudioSessionProperty_OutputDestinations,
&size, &audioOutputRoutes);
if (err == noErr){
CFIndex i, c = CFArrayGetCount(audioOutputRoutes);
CFDictionaryRef audioOutput;
for (i=0; i<c; i++) {
audioOutput =
(CFDictionaryRef)CFArrayGetValueAtIndex(audioOutputRoutes, i);
CFNumberRef routeId =
(CFNumberRef)CFDictionaryGetValue(audioOutput,
kAudioSession_OutputDestinationKey_ID);
CFStringRef routeDescription =
(CFStringRef)CFDictionaryGetValue(audioOutput,
kAudioSession_OutputDestinationKey_Description);
}
}
Cheers
Aran.
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