record input coming from bluetooth headset in iPhone - iphone

Question

I have a project in which I have to record the voice coming from bluetooth headset and play with default iPhone speaker. I have searched a lot and got this code.
UInt32 allowBluetoothInput = 1;
AudioSessionSetProperty (
kAudioSessionProperty_OverrideCategoryEnableBluetoothInput,
sizeof (allowBluetoothInput),
&allowBluetoothInput
);
------------ CODE FOR AUDIO RECORDER START AND STOP ------------
- (IBAction)Record: (id)sender
{
UIButton *btn = (UIButton *)sender;
if([btn isSelected])
{
[audioRecorder stop];
[btn setSelected:NO];
[btn setTitle:#"Start Recording" forState:UIControlStateNormal];
}
else
{
[audioRecorder record];
[btn setSelected:YES];
[btn setTitle:#"Stop Recording" forState:UIControlStateNormal];
}
}
and i am using avaudiorecorder after this. There seems to be something else I am missing in here.
-------- Code for audio recorder ---------
NSURL *soundFileURL = [NSURL fileURLWithPath:AUDIO_FILE];
NSDictionary *recordSettings = [NSDictionary
dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:AVAudioQualityMin],
AVEncoderAudioQualityKey,
[NSNumber numberWithInt:16],
AVEncoderBitRateKey,
[NSNumber numberWithInt: 2],
AVNumberOfChannelsKey,
[NSNumber numberWithFloat:44100.0],
AVSampleRateKey,
nil];
NSError *error = nil;
audioRecorder = [[AVAudioRecorder alloc]
initWithURL:soundFileURL
settings:recordSettings
error:&error];
if (error)
{
NSLog(#"error: %#", [error localizedDescription]);
} else {
[audioRecorder prepareToRecord];
}
I think i am missing something else which needs to be added here. I just want the bluetooth headset input audio. Any help would be appreciated.
Thanks in Advance!!

Answer 1

i just review your issue and got nice answer something you want try with Bellow code:-
// create and set up the audio session
AVAudioSession* audioSession = [AVAudioSession sharedInstance];
[audioSession setDelegate:self];
[audioSession setCategory: AVAudioSessionCategoryPlayAndRecord error: nil];
[audioSession setActive: YES error: nil];
// set up for bluetooth microphone input
UInt32 allowBluetoothInput = 1;
OSStatus stat = AudioSessionSetProperty (
kAudioSessionProperty_OverrideCategoryEnableBluetoothInput,
sizeof (allowBluetoothInput),
&allowBluetoothInput
);
NSLog(#"status = %x", stat); // problem if this is not zero
// check the audio route
UInt32 size = sizeof(CFStringRef);
CFStringRef route;
OSStatus result = AudioSessionGetProperty(kAudioSessionProperty_AudioRoute, &size, &route);
NSLog(#"route = %#", route);
// if bluetooth headset connected, should be "HeadsetBT"
// if not connected, will be "ReceiverAndMicrophone"
// now, play a quick sound we put in the bundle (bomb.wav)
CFBundleRef mainBundle = CFBundleGetMainBundle();
CFURLRef soundFileURLRef;
SystemSoundID soundFileObject;
soundFileURLRef = CFBundleCopyResourceURL (mainBundle,CFSTR ("bomb"),CFSTR ("wav"),NULL);
NSError *error = nil;
audioRecorder = [[AVAudioRecorder alloc]
initWithURL:soundFileURLRef
settings:recordSettings
error:&error];
if (error)
{
NSLog(#"error: %#", [error localizedDescription]);
} else {
[audioRecorder prepareToRecord];
}
Credit goes to This

Answer 2

add the audio session to your code
// create and set up the audio session
AVAudioSession* audioSession = [AVAudioSession sharedInstance];
[audioSession setDelegate:self];
[audioSession setCategory:AVAudioSessionCategoryRecord error:nil];
[audioSession setActive:YES error:nil];

Answer 3

Try out this amazing piece of code. Will work for sure
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionAllowBluetooth error:NULL];
[audioSession setActive:YES error:NULL];
NSString *preferredPortType = AVAudioSessionPortBluetoothHFP;
for (AVAudioSessionPortDescription *desc in audioSession.availableInputs)
{
if ([desc.portType isEqualToString: preferredPortType])
{
[audioSession setPreferredInput:desc error:nil];
}
}