I'm trying to allow for a toggle between bluetooth headsets (airpods in my case) and the phone speaker, using AVAudioSession. I initialize my session as so:
AVAudioSessionCategoryOptions options = (AVAudioSessionCategoryOptionAllowBluetooth | AVAudioSessionCategoryOptionDefaultToSpeaker);
NSError *error = nil;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:options error:&error];
Then I try to alternate between output modes as so:
-(void)setIncomingSoundMode:(IncomingSoundMode)incomingSoundMode{
[self removeAudioRouteChangedObserver];
[NNLogger logFromInstance: self message: #"Audio stream setting use speaker" data: #(incomingSoundMode)];
_incomingSoundMode = incomingSoundMode;
AVAudioSession *session = [AVAudioSession sharedInstance];
AVAudioSessionPortDescription *routePort = session.currentRoute.outputs.firstObject;
NSString *portType = routePort.portType;
NSLog(#"current port type: %#",portType);
NSError *audioPortError = nil;
if(incomingSoundMode == IncomingSoundModeSpeaker){
[session overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:&audioPortError];
[self muteChannel:NO];
} else if(incomingSoundMode == IncomingSoundModeHeadset){
[session overrideOutputAudioPort:AVAudioSessionPortOverrideNone error:&audioPortError];
[self muteChannel:NO];
} else if(incomingSoundMode == IncomingSoundModeBluetooth){
[session overrideOutputAudioPort:AVAudioSessionPortOverrideNone error:&audioPortError];
[self muteChannel:NO];
} else if(incomingSoundMode == IncomingSoundModeSilent){
[self muteChannel:YES];
}
if(audioPortError){
NSLog(#"audioPortError - %#",audioPortError.localizedDescription);
}
NSError *sessionError = nil;
[session setActive: YES error:&sessionError];
if(sessionError){
NSLog(#"sessionError - %#",sessionError.localizedDescription);
}
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self addAudioRouteChangedObserver];
});
}
The issue is when I try to override to speaker output while bluetooth headphones are connected - it simply doesn't switch to the speaker. This same functionality works with wired headphones, or when toggling device speaker to headset:
[session overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:&audioPortError];
[session setActive: YES error:&sessionError];
Any clues on what I'm doing wrong here??
Thanks
I have exact same issue in the application I'm working on and it's reproducible only on iOS 12+ and only for W1 / H1 chip bluetooth devices (AirPods / new Beats Studio, etc.).
I asked apple audio engineers on WWDC about it (by showing my bug report) and they have confirmed that this is a known issue they're working on. Should be fixed in iOS update.. somewhen later :) To speed things up, you could duplicate this bug report: rdar://49734534
P.S. There is no pretty workaround for this issue, but there are few options:
Use MPVolumeView's route button. It works, and seems like this is
how WhatsApp handles this case.
Disable bluetooth option for AVAudioSession. Far from perfect solution, but may work for some apps.
Related
I'm working on VOIP with Callkit
It work fine, except audio output source
It always output audio by iPhone speaker
some of so answer said set AvAudioSession Option as AVAudioSessionCategoryOptionAllowBluetooth will work, but still failed
and I tried to set bluetooth headset as preferred, like this, failed
by the way, how to make ringtone broadcast by headset?
below is my code, follow the suggestion in this discussion, I configure AVAudioSession right after dialing and get coming call
- (void)getCall:(NSDictionary *)infoDic {
CXCallUpdate *update = [[CXCallUpdate alloc]init];
// config update
NSUUID *uuid = [NSUUID UUID];
[self.provider reportNewIncomingCallWithUUID:uuid update:update completion:^(NSError * _Nullable error) {
if (error)
NSLog(#"%#", error.localizedDescription);
}];
NSArray *video = #[#(ReceiveVideoReq), #(VideoCalling)];
if ([video containsObject:#(self.client.callStage)])
[ProviderManager configureAudio:true];
else
[ProviderManager configureAudio:false];
}
- (void)dialPhone:(BOOL)isVideo {
CXHandle *handle = [[CXHandle alloc]initWithType:CXHandleTypePhoneNumber value:#"AAAA"];
CXStartCallAction *start = [[CXStartCallAction alloc]initWithCallUUID:uuid handle:handle];
start.video = isVideo;
CXTransaction *trans = [[CXTransaction alloc]initWithAction:start];
[self callControlReq:trans];
[ProviderManager configureAudio:isVideo];
}
+ (void)configureAudio:(BOOL)isVideo {
NSError *error=nil, *sessionError = nil;
AVAudioSession *sess = [AVAudioSession sharedInstance];
[sess setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionAllowBluetooth | AVAudioSessionCategoryOptionAllowBluetoothA2DP error:&sessionError];
if (sessionError)
NSLog(#"ERROR: setCategory %#", [sessionError localizedDescription]);
if (isVideo)
[sess setMode:#"AVAudioSessionModeVideoChat" error:&sessionError];
else
[sess setMode:#"AVAudioSessionModeVoiceChat" error:&sessionError];
if (sessionError) {
NSLog(#"ERROR: setCategory %#", [sessionError localizedDescription]);
}
[sess overrideOutputAudioPort:AVAudioSessionPortOverrideNone error:&sessionError];
[[AVAudioSession sharedInstance] setActive:true withOptions:AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation error:&error];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
}
After research, I found the root case of this issue.
Open setting->Accessibility->Touch->Call Audio Routing, there are three option: Automatic, Bluetooth Headset, Speaker.
Default is Automatic, that means if you answer a phone call(Include callkit), when you answer call by your bluetooth device, audio will route to bluetooth, if you answer the call in iPhone, it will route to receiver.
So this actually not an issue, just system behavior.
And do not try to force switch to bluetooth by using [AVAudioSession setPreferredInput:], it will cause more serious issue.
In my case: I call this force switch to bluetooth after audio connected, it worked, but when the bluetooth device disconnected, my audio completely not work and app not get any audio route change callback, even not work after connected bluetooth device again.
I'm making an app that supports both video playback and recording. I always want to allow background audio mixing except for during video playback (during playback, background audio should be muted). Therefore, I use the two methods below while changing the state of playback. When my AVPlayer starts loading, I call MuteBackgroundAudio, and when I dismiss the view controller containing it, I call ResumeBackgroundAudio. This works as expected, and the audio returns successfully after leaving playback.
The issue is that after doing this at least once, whenever I record anything using AVCaptureSession, no sounds gets recorded. My session is configured like so:
AVCaptureDevice *audioDevice = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio] firstObject];
AVCaptureDeviceInput *audioDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:&error];
if (error)
{
NSLog(#"%#", error);
}
if ([self.session canAddInput:audioDeviceInput])
{
[self.session addInput:audioDeviceInput];
}
[self.session setAutomaticallyConfiguresApplicationAudioSession:NO];
// ... videoDeviceInput
Note that I have not set usesApplicationAudioSession, so it defaults to YES.
void MuteBackgroundAudio(void)
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
if ([[AVAudioSession sharedInstance] isOtherAudioPlaying] && !isMuted)
{
isMuted = YES;
NSError *error = nil;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord
withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker
error:&error];
if (error)
{
NSLog(#"DEBUG - Set category error %ld, %#", (long)error.code, error.localizedDescription);
}
NSError *error2 = nil;
[[AVAudioSession sharedInstance] setActive:YES
withOptions:0
error:&error2];
if (error2)
{
NSLog(#"DEBUG - Set active error 2 %ld, %#", (long)error.code, error.localizedDescription);
}
}
});
}
void ResumeBackgroundAudio(void)
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
if (isMuted)
{
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *deactivationError = nil;
[audioSession setActive:NO withOptions:AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation error:&deactivationError];
if (deactivationError)
{
NSLog(#"DEBUG - Failed at deactivating audio session, retrying...");
ResumeBackgroundAudio();
return;
}
isMuted = NO;
NSLog(#"DEBUG - Audio session deactivated");
NSError *categoryError = nil;
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord
withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker | AVAudioSessionCategoryOptionMixWithOthers
error:&categoryError];
if (categoryError)
{
NSLog(#"DEBUG - Failed at setting category");
return;
}
NSLog(#"DEBUG - Audio session category set to mix with others");
NSError *activationError = nil;
[audioSession setActive:YES error:&activationError];
if (activationError)
{
NSLog(#"DEBUG - Failed at activating audio session");
return;
}
NSLog(#"DEBUG - Audio session activated");
}
});
}
Debugging
I have noticed that the audioSession always needs two tries to successfully deactivate after calling ResumeBackgroundAudio. It seems my AVPlayer does not get deallocated or stopped in time, due to this comment in AVAudioSession.h:
Note that this method will throw an exception in apps linked on or
after iOS 8 if the session is set inactive while it has running or
paused I/O (e.g. audio queues, players, recorders, converters, remote
I/Os, etc.).
The fact that no sound gets recorded bring me to believe the audioSession does not actually get activated, but my logging says it does (always in the second iteration of the recursion).
I got the idea of using recursion to solve this problem from this post.
To clarify, the flow that causes the problem is the following:
Open app with Spotify playing
Begin playback of any content in the app
Spotify gets muted, playback begins (MuteBackgroundAudio)
Playback ends, Spotify starts playing again (ResumeBackgroundAudio)
Start recording
Stop recording, get mad that there is no audio
I've had the exact same issue as you're describing, down to the very last detail ([audioSession setActive:NO withOptions:AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation error:&deactivationError]; failed the first time no matter what)
The only acceptable way, for my case, was to stop then start the AVCaptureSession. I'm not entirely sure but I think this is the same exact way Whatsapp handles it - their camera behaves exactly like mine with the solution I'm suggesting.
Removing and adding the same audio input on the already running session also seemed to work but I got a terrible camera freeze - nothing compared to the session start / stop.
The recursion solution is nice, but I think it would be a great idea to 'throttle' that recursion call (add a short delay & a max retry count of some sort) in case for a legit reason the set fails every time. Otherwise your stack will overflow and your app will crash.
If you or anyone found a better solution to this I would love to know it.
So I was working on a video capture app that plays background audio (from Spotify or Apple Music) and I'm having a small problem where there's a small audio interruption when I open my app while audio is being played.
Here's what I have for allowing background audio to play (located in my didFinishLaunchingWithOptions in my AppDelegate class:
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord
withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker | AVAudioSessionCategoryOptionMixWithOthers
error:nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];
Any clues to stopping that beginning interruption? Thanks!!
EDIT
I should also mention after setting the AVAudioSession I am setting my AVCaptureSession. I initialize it then set the properties.
self.session.usesApplicationAudioSession = YES;
self.session.automaticallyConfiguresApplicationAudioSession = NO;
I think the reason of interruption is you are updating category in every case. You may use below function to check and update category only if it is needed.
-(BOOL) checkAndUpdateCategory {
NSError *error;
AVAudioSession *session = [AVAudioSession sharedInstance];
BOOL result = [session.category isEqualToString:AVAudioSessionCategoryPlayAndRecord];
if(!result) {
result = [session setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker | AVAudioSessionCategoryOptionMixWithOthers error:&error];
if(error) {
//Handle Error
NSLOG(#"Error:%#", error);
}
}
return result;
}
Record audio from BT headset. After record, switch route and play through wireless BT speaker.
i have implemented but audio is recording and playing in same headset or speaker.how record and play viseversa ? any solution.?
Thanks in advance
hey #Rushi i think this code will help you for playing audio viseversa
-(IBAction)RecordButtonPlayed:(id)sender
{
if(player.playing)
{
[player stop];
}
if (!recorder.recording)
{
[[AVAudioSession sharedInstance] setActive:YES error:NULL];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord withOptions:AVAudioSessionCategoryOptionAllowBluetooth error:NULL];
[_btnRecord setImage:[UIImage imageNamed:#"player-stop-outline-512.png"] forState:UIControlStateNormal];
[recorder record];
}
else
{
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:NULL];
[_btnRecord setImage:[UIImage imageNamed:#"171.png"] forState:UIControlStateNormal];
[recorder stop];
}
}
AVAudioSession can be used to set the default output port for your session.
The first thing to do is set up the category AVAudioSession. There are a couple of options here, since we want to be able to play and record sounds.
AVAudioSessionCategoryPlayAndRecord — Playback and record. The input and output need not occur simultaneously, but can if needed. Use for audio chat apps.
AVAudioSessionCategoryMultiRoute — Playback and record. Allow simultaneous input and output for different audio streams, for example, USB and headphone output. A DJ app would benefit from using the multiroute category. A DJ often needs to listen to one track of music while another track is playing. Using the multiroute category, a DJ app can play future tracks through the headphones while the current track is played for the dancers.
In this situation, it looks like AVAudioSessionCategoryPlayAndRecord would be appropriate. Set it like this:
NSError *setCategoryError = nil;
BOOL success = [[AVAudioSession sharedInstance]
setCategory: AVAudioSessionCategoryPlayAndRecord
error: &setCategoryError];
if (!success) { /* handle the error in setCategoryError */ }
Apple suggests setting the category once, and then modifying the input routes depending on our needs.
Once the category is set to AVAudioSessionCategoryPlayAndRecord, the line below will return a list of available input and output routes.
NSArray <AVAudioSessionPortDescription *> *availableInputs = [AVAudioSession sharedInstance].availableInputs;
From the OP, this port is going to be used for recording.
AVAudioSessionPortBluetoothHFP - A Bluetooth enabled device supporting the Hands-Free Profile (HFP).
Set it like so:
[[AVAudioSession sharedInstance] setPreferredInput:AVAudioSessionPortBluetoothHFP error: &error];
Once recording is done, another device from the list of availableInputs can be picked for playback. Most probably, the playback port for BT speakers would be AVAudioSessionPortBluetoothA2DP, but here is a comprehensive list of all playback ports.
Set it like so:
[[AVAudioSession sharedInstance] setPreferredInput:AVAudioSessionPortBluetoothA2DP error: &error];
Now the sound should play to the BT speaker.
It's important to note here that, [[AVAudioSession sharedInstance] overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:&error]; will revert to the phone's internal speaker, and NOT the BT speaker.
Please use AVAudioSession method.
- (BOOL)setCategory:(NSString *)category
withOptions:(AVAudioSessionCategoryOptions)options
error:(NSError **)outError
and set the following
with category as
AVAudioSessionCategoryPlayAndRecord
or AVAudioSessionCategoryRecord
and options as
AVAudioSessionCategoryOptionAllowBluetooth
Remember it may work for A2DP bluetooth only.
Try then with this
AVAudioSessionCategoryOptionAllowBluetooth
In order to receive bluetooth accessory events you would have to write below code in your view controller:
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
and then I think setting the Audio Session Category to MultiRoute could allow for audio to be routed separately.Whereas I tried to do so earlier in iOS7. and it seems that every time you change either the input or output, iOS changes the audio device altogether.I am not sure if its possible with new versions too.
However you can get the list of all currently available inputs using following code:
// portDesc.portType could be for example - BluetoothHFP, MicrophoneBuiltIn, MicrophoneWired
NSArray *availInputs = [[AVAudioSession sharedInstance] availableInputs];
int count = [availInputs count];
for (int k = 0; k < count; k++) {
AVAudioSessionPortDescription *portDesc = [availInputs objectAtIndex:k];
NSLog(#"input%i port type %#", k+1, portDesc.portType);
NSLog(#"input%i port name %#", k+1, portDesc.portName);
}
and outputs as:
AVAudioSession *session = [AVAudioSession sharedInstance];
NSLog(#"Outputs: %#", [[session currentRoute] outputs]);
Good Luck!!
I am trying to use AVSpeechSynthesizer when the phone is locked, but the audio stops when I lock the screen. I am using the simulator, not an actual device. I have seen a couple other questions similar to this on this site and I followed their recommendations, but it still does not work.
In the app delegate I set the audio session category to AVAudioSessionCategoryPlayback.
- (void)configureAudioSession{
NSError *error = NULL;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback withOptions:AVAudioSessionCategoryOptionMixWithOthers error:&error];
if(error) {
NSLog(#"Error setting category of audio session: %#",error.description);
}
error = NULL;
[[AVAudioSession sharedInstance] setActive:YES error: &error];
if (error) {
NSLog(#"Error activating audio session: %#",error.description);
}
}
And I checked the 'Audio and Airplay' mode under Project Settings->Capabilities->Background Modes.
Can anyone tell me how to get this to work?
Here's how I got AVSpeechSynthesizer to continue speaking when phone goes idle, if phone gets locked, or if app goes to background. (iOS8)
Step 1) Open up info.plist and add the key "Required background modes". Within this array, add a String called "App plays audio or streams audio/video using AirPlay".
Step 2) Add the following to your app delegate didFinishLaunchingWithOptions:
NSError *error = NULL;
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayback error:&error];
if(error) {
// Do some error handling
}
[session setActive:YES error:&error];
if (error) {
// Do some error handling
}
Step 3) Run on your device and test it out!
I was able to follow this post to get it to work about a month ago:
AVAudioPlayer stops playing on screen lock even though the category is AVAudioSessionCategoryPlayback
Basically, you need to make entry in your app's .plist file. I'm not sure this will work on the simulator, so you will probably want to test it on an actual device.