#4094 - Added multiple observation on media services and a mediaServiceProvider that prevents simultaneous playback from multiple player instances.

Riot/Modules/Room/VoiceMessages/VoiceMessageMediaServiceProvider.swift

@@ -0,0 +1,80 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+@objc public class VoiceMessageMediaServiceProvider: NSObject, VoiceMessageAudioPlayerDelegate, VoiceMessageAudioRecorderDelegate {
+    
+    private let audioPlayers: NSHashTable<VoiceMessageAudioPlayer>
+    private let audioRecorders: NSHashTable<VoiceMessageAudioRecorder>
+    
+    @objc public static let sharedProvider = VoiceMessageMediaServiceProvider()
+    
+    private override init() {
+        audioPlayers = NSHashTable<VoiceMessageAudioPlayer>(options: .weakMemory)
+        audioRecorders = NSHashTable<VoiceMessageAudioRecorder>(options: .weakMemory)
+    }
+    
+    @objc func audioPlayer() -> VoiceMessageAudioPlayer {
+        let audioPlayer = VoiceMessageAudioPlayer()
+        audioPlayer.registerDelegate(self)
+        audioPlayers.add(audioPlayer)
+        return audioPlayer
+    }
+    
+    @objc func audioRecorder() -> VoiceMessageAudioRecorder {
+        let audioRecorder = VoiceMessageAudioRecorder()
+        audioRecorder.registerDelegate(self)
+        audioRecorders.add(audioRecorder)
+        return audioRecorder
+    }
+    
+    @objc func stopAllServices() {
+        stopAllServicesExcept(nil)
+    }
+    
+    // MARK: - VoiceMessageAudioPlayerDelegate
+    
+    func audioPlayerDidStartPlaying(_ audioPlayer: VoiceMessageAudioPlayer) {
+        stopAllServicesExcept(audioPlayer)
+    }
+    
+    // MARK: - VoiceMessageAudioRecorderDelegate
+    
+    func audioRecorderDidStartRecording(_ audioRecorder: VoiceMessageAudioRecorder) {
+        stopAllServicesExcept(audioRecorder)
+    }
+    
+    // MARK: - Private
+    
+    private func stopAllServicesExcept(_ service: AnyObject?) {
+        for audioPlayer in audioPlayers.allObjects {
+            if audioPlayer === service {
+                continue
+            }
+            
+            audioPlayer.stop()
+        }
+        
+        for audioRecoder in audioRecorders.allObjects {
+            if audioRecoder === service {
+                continue
+            }
+            
+            audioRecoder.stopRecording()
+        }
+    }
+}