offtopic: RFCOMM+SCO connection
offtopic: RFCOMM+SCO connection
- Subject: offtopic: RFCOMM+SCO connection
- From: Mihnea Galca <email@hidden>
- Date: Thu, 19 Apr 2007 13:14:12 +0300 (EEST)
- Importance: Normal
Hello,
I know this is a bit of topic but I have tried the bluetooth list with no
success.
Is it possible to have a rfcomm connection with a bluetooth headset
on top of which to start/stop SCO connection ?
Usage scenario: a RFCOMM connection has to be maintained to a bluetooth
headset to get button press events, but in the same time, SCO is
activated to play/record sounds using the headset.
So far, I could make a RFCOMM connection to capture button press events,
but I couldn't start SCO in any way. SCO seems connected to a system audio
device which connects/disconnects the headset when needed. I couldn't find
any method to control SCO from API.
How can I solve the problem in the above given scenario ?
Do I need to develop my own SCO layer over RFCOMM and create a new audio
device driver ? Any pointers to do such a thing ? I've tried
IOBluetoothAddSCOAudioDevice, but it's a deprecated function
and the only thing it does, is to create the associated audio device, if
such a device is not already present. My code is the following:
void* keys[1];
keys[0]=[[NSString alloc] initWithCString:"IOAudioControls"];
void* values[1];
id array=[[NSMutableArray alloc] init];
values[0]=array;
CFDictionaryRef dictionary=CFDictionaryCreate(NULL,keys,values,1,
&kCFTypeDictionaryKeyCallBacks,&kCFTypeDictionaryValueCallBacks);
IOReturn res=IOBluetoothAddSCOAudioDevice(m_headset,dictionary);
The operation was successful in the case when the audio device didn't
exist. In the case when the device existed (created using bluetooth
interface in the OS), the function returned a general error.
Regards,
Mihnea GALCA
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