✨ Added recordedDuration to get recorded duration for ios and added onRecordingEnded stream

Author: Ujas-Majithiya

CHANGELOG.md

@@ -1,9 +1,10 @@
-## 1.0.2 (Unreleased)
+## 1.0.2
 
 - Now, calling `stopAllPlayers` is not mandatory for disposing streams and it will also not dispose controller. With last remaining player they will be disposed (Streams can be re-initialised by creating a new PlayerController).
 - Added legacy normalization with this fixed [#144](https://github.com/SimformSolutionsPvtLtd/audio_waveforms/issues/144).
 - Added `onRecorderStateChanged` stream to monitor Recorder state changes.
-- Added `onCurrentDuration` stream to get latest recorded audio duration
+- Added `onCurrentDuration` stream to get latest recorded audio duration.
+- Added `onRecordingEnded` stream to get recorded audio file duration. Fixes [#157](https://github.com/SimformSolutionsPvtLtd/audio_waveforms/issues/157).
 
 ## 1.0.1
 

README.md

@@ -60,12 +60,13 @@ import 'package:audio_waveforms/audio_waveforms.dart';
 ### Usage
 1. Recording audio
 ```dart
-RecorderController controller = RecorderController();   // Initialise
-await controller.record(path: 'path');                  // Record (path is optional)
-await controller.pause();                               // Pause recording
-final path = await controller.stop();                   // Stop recording and get the path
-controller.refresh();                                   // Refresh waveform to original position
-controller.dispose();                                   // Dispose controller
+RecorderController controller = RecorderController();      // Initialise
+await controller.record(path: 'path');                     // Record (path is optional)
+final hasPermission = await controller.checkPermission();  // Check mic permission (also called duration record)
+await controller.pause();                                  // Pause recording
+final path = await controller.stop();                      // Stop recording and get the path
+controller.refresh();                                      // Refresh waveform to original position
+controller.dispose();                                      // Dispose controller
 ```
 
 2. Use `AudioWaveforms` widget in widget tree
@@ -101,6 +102,7 @@ controller.sampleRate = 44100;                                   // Updating sam
 controller.bitRate = 48000;                                      // Updating bitrate
 controller.onRecorderStateChanged.listen((state){});             // Listening to recorder state changes
 controller.onCurrentDuration.listen((duration){});               // Listening to current duration updates
+controller.onRecordingEnded.listen((duration));                  // Listening to audio file duration
 controller.recordedDuration;                                     // Get recorded audio duration 
 controller.currentScrolledDuration;                              // Current duration position notifier
 ```

ios/Classes/AudioRecorder.swift

@@ -6,6 +6,8 @@ public class AudioRecorder: NSObject, AVAudioRecorderDelegate{
     var path: String?
     var hasPermission: Bool = false
     var useLegacyNormalization: Bool = false
+    var audioUrl: URL?
+    var recordedDuration: CMTime = CMTime.zero
 
     public func startRecording(_ result: @escaping FlutterResult,_ path: String?,_ encoder : Int?,_ sampleRate : Int?,_ bitRate : Int?,_ fileNameFormat: String, _ useLegacy: Bool?){
         useLegacyNormalization = useLegacy ?? false
@@ -41,21 +43,44 @@ public class AudioRecorder: NSObject, AVAudioRecorderDelegate{
             try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playAndRecord, options: options)
             try AVAudioSession.sharedInstance().setActive(true)
 
-            let url = URL(string: self.path!) ?? URL(fileURLWithPath: self.path!)
-            audioRecorder = try AVAudioRecorder(url: url, settings: bitRate != nil ? settingsWithBitrate as [String : Any] : settings as [String : Any])
+            audioUrl = URL(fileURLWithPath: self.path!)
+            
+            if(audioUrl == nil){
+                result(FlutterError(code: Constants.audioWaveforms, message: "Failed to initialise file URL", details: nil))
+            }
+            audioRecorder = try AVAudioRecorder(url: audioUrl!, settings: bitRate != nil ? settingsWithBitrate as [String : Any] : settings as [String : Any])
+            
             audioRecorder?.delegate = self
             audioRecorder?.isMeteringEnabled = true
             audioRecorder?.record()
             result(true)
         } catch {
-            result(FlutterError(code: "", message: "Failed to start recording", details: nil))
+            result(FlutterError(code: Constants.audioWaveforms, message: "Failed to start recording", details: nil))
         }
     }
 
     public func stopRecording(_ result: @escaping FlutterResult) {
         audioRecorder?.stop()
+        if(audioUrl != nil) {
+            let asset = AVURLAsset(url:  audioUrl!)
+            if #available(iOS 15.0, *) {
+                Task {
+                    do {
+                        recordedDuration = try await asset.load(.duration)
+                        result([path,Int(recordedDuration.seconds * 1000).description])
+                    } catch let err {
+                        debugPrint(err.localizedDescription)
+                        result([path,CMTime.zero.seconds.description])
+                    }
+                }
+            } else {
+                recordedDuration = asset.duration
+                result([path,Int(recordedDuration.seconds * 1000).description])
+            }
+        } else {
+            result([path,CMTime.zero.seconds.description])
+        }
         audioRecorder = nil
-        result(path)
     }
 
     public func pauseRecording(_ result: @escaping FlutterResult) {

lib/src/audio_file_waveforms.dart

@@ -65,8 +65,7 @@ class AudioFileWaveforms extends StatefulWidget {
   /// Generate waveforms from audio file. You play those audio file using
   /// [PlayerController].
   ///
-  /// When you play the audio file, another waveform
-  /// will drawn on top of it to show
+  /// When you play the audio file, waves change their color according to
   /// how much audio has been played and how much is left.
   ///
   /// With seeking gesture enabled, playing audio can be seeked to

lib/src/controllers/recorder_controller.dart

@@ -96,11 +96,20 @@ class RecorderController extends ChangeNotifier {
   final StreamController<RecorderState> _recorderStateController =
       StreamController.broadcast();
 
+  final StreamController<Duration> _recordedFileDurationController =
+      StreamController.broadcast();
+
   /// A Stream to monitor change in RecorderState. Events are emitted whenever
   /// there is change in the RecorderState.
   Stream<RecorderState> get onRecorderStateChanged =>
       _recorderStateController.stream;
 
+  /// A stream to get duration of recording when audio recorder has
+  /// been stopped. Events are only emitted if platform could extract the
+  /// duration of audio file when recording is ended.
+  Stream<Duration> get onRecordingEnded =>
+      _recordedFileDurationController.stream;
+
   /// A class having controls for recording audio and other useful handlers.
   ///
   /// Use [useLegacyNormalization] parameter to use normalization before
@@ -281,6 +290,7 @@ class RecorderController extends ChangeNotifier {
           var duration = int.tryParse(audioInfo[1]!);
           if (duration != null) {
             recordedDuration = Duration(milliseconds: duration);
+            _recordedFileDurationController.add(recordedDuration);
           }
         }
         elapsedDuration = Duration.zero;
@@ -415,6 +425,7 @@ class RecorderController extends ChangeNotifier {
     _currentScrolledDuration.dispose();
     _currentDurationController.close();
     _recorderStateController.close();
+    _recordedFileDurationController.close();
     _recorderTimer?.cancel();
     _timer?.cancel();
     _timer = null;