Canardoux
[BUG]: Recorder to StreamFloat32 not emit event again after resume in background.
Flutter Sound Version :
├── flutter_sound 9.25.9 │ ├── flutter_sound_platform_interface 9.25.9 │ ├── flutter_sound_web 9.25.9 │ │ ├── flutter_sound_platform_interface...
Severity
- Result is not what expected ? stream.listen not running again after pause and resume recorder when app in background.
Platforms you faced the error
- iOS
Describe the bug I'm using flutter_sound to record audio to StreamFloat32 to handle data realtime. When app running in foreground. I can pause and resume recorder normal & get StreamController emit data. But if app running on background. When resume, StreamController is not emit event again. I try restart StreamController & start recorder again. But it's not working.
To Reproduce
FlutterSoundRecorder? _recorder = FlutterSoundRecorder();
StreamSubscription? _recordingDataSubscriptionF32;
@override
initState() {
await _recorder?.openRecorder();
}
Future<void> startRecording() async {
var recordingDataControllerF32 = StreamController<List<Float32List>>();
_recordingDataSubscriptionF32 = recordingDataControllerF32.stream.listen((data) {
// handle data emit here
}
await _recorder?.startRecorder(
codec: Codec.pcmFloat32,
sampleRate: 44100,
numChannels: 1,
audioSource: AudioSource.defaultSource,
bufferSize: 5000,
toStreamFloat32: recordingDataControllerF32.sink,
);
}
Future<void> pauseRecording() async {
await _recorder?.stopRecorder();
if (_recordingDataSubscriptionF32 != null) {
await _recordingDataSubscriptionF32!.cancel();
_recordingDataSubscriptionF32 = null;
}
}
Future<void> resumeRecording() async {
startRecording()
}
I'm using audio_session package to detect if app have interrupt when recording
final session = await AudioSession.instance;
await session.configure(const AudioSessionConfiguration(
avAudioSessionCategory: AVAudioSessionCategory.playAndRecord));
session.interruptionEventStream.listen((event) {
if (event.begin) {
// Handle audio interruption began (e.g., phone call)
LoggerUtils.info('AudioSession: interruption began');
pauseRecording();
} else {
// Handle audio interruption ended (e.g., phone call ended)
LoggerUtils.info('AudioSession: interruption ended');
resumeRecording();
}
});
I don't reproduce your issue with the Demo example. When I have a phone call during recording, after the com finished, the recorder is in pause state, but pause/resume and stop/start work correctly.
@duongvanthai : yes, you are right. There is a problem somewhere. I am going to work on that.
@duongvanthai , my problem was something else (I didn't call audio_session correctly).
I did some test with the dev. sources (not exactly your configuration) but I haven't see any problem.
- I startRecorder() to stream
- I do a phone call during the recording
- When the com. is finished, Flutter Sound is in pause state
- I do pause()/resume()
- The recorder works correctly.
- I do a startPlayer() to check that everything before and after the phone call is correctly recorded
Have you any idea why it works for me but not for you ?
If app running on foreground when incoming call, no problem. When you start record, go to home screen -> make a phone call. Problem will happen.
I try with flutter_sound example still have this issue.
I have a function
Future<void> configAudioSession() async {
final session = await AudioSession.instance;
await session.configure(const AudioSessionConfiguration(
avAudioSessionCategory: AVAudioSessionCategory.playAndRecord));
session.interruptionEventStream.listen((event) {
if (event.begin) {
// Handle audio interruption began (e.g., phone call)
print('AudioSession: interruption began');
stopRecorder();
} else {
// Handle audio interruption ended (e.g., phone call ended)
print('AudioSession: interruption ended');
record();
}
});
}
@override
void initState() {
super.initState();
setCodec(Codec.pcmFloat32);
// Do not access your FlutterSoundPlayer or FlutterSoundRecorder before the completion of the Future
_mPlayer!.openPlayer().then((value) {
setState(() {
_mPlayerIsInited = true;
});
});
_openRecorder();
configAudioSession();
}
'''
'''
_mRecordingDataSubscription =
recordingDataController.stream.listen((buffer) {
print('recordingDataController.stream.listen');
sink!.add(buffer);
});
'''
After phone call end recordingDataController.stream.listen not emit event again, although startRecord log still success start again.
@duongvanthai ,
I did a test with an outgoing call on taudio 10.2.0 and everything seems to work fine.
But I have not included your call to session.interruptionEventStream.listen().
Perhaps your problem is caused by this call.
Perhaps the issue is fixed in 10.2.0.
If you want to do a test with 10.2.0 it is very simple (just 5 minutes) : here is a guide to migrate to 10.2.0
Tks @Larpoux, I also trying with taudio. Still have this issue. As I said, it only happen when you recording in background and have phone call, or user play youtube. FlutterSoundRecorder can resume normal after phone call end or user exit youtube. Recorder can comeback & emit event again in onProgress.listen. But can not emit event again on stream.
@Larpoux on Android platform,you should move "recording" logic to a service,and running as a FOREGROUND_SERVICE.
