Add voice message playback from the timeline (#1844)

ElementX/Sources/Services/MediaPlayer/MediaPlayerProtocol.swift

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+//
+// Copyright 2023 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
+
+enum MediaPlayerState {
+    case loading
+    case playing
+    case paused
+    case stopped
+    case error
+}
+
+protocol MediaPlayerProtocol {
+    var mediaSource: MediaSourceProxy? { get }
+    
+    var currentTime: TimeInterval { get }
+    var url: URL? { get }
+    var state: MediaPlayerState { get }
+    
+    func load(mediaSource: MediaSourceProxy, using url: URL)
+    func play()
+    func pause()
+    func stop()
+    func seek(to progress: Double) async
+}

ElementX/Sources/Services/MediaPlayer/MediaPlayerProvider.swift

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+//
+// Copyright 2023 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
+
+class MediaPlayerProvider: MediaPlayerProviderProtocol {
+    private let mediaProvider: MediaProviderProtocol
+    private var audioPlayer: AudioPlayerProtocol?
+            
+    init(mediaProvider: MediaProviderProtocol) {
+        self.mediaProvider = mediaProvider
+    }
+    
+    deinit {
+        audioPlayer = nil
+    }
+    
+    func player(for mediaSource: MediaSourceProxy) -> MediaPlayerProtocol? {
+        guard let mimeType = mediaSource.mimeType else {
+            MXLog.error("Unknown mime type")
+            return nil
+        }
+        
+        if mimeType.starts(with: "audio/") {
+            if audioPlayer == nil {
+                audioPlayer = AudioPlayer()
+            }
+            return audioPlayer
+        } else {
+            MXLog.error("Unsupported media type: \(mediaSource.mimeType ?? "unknown")")
+            return nil
+        }
+    }
+}

ElementX/Sources/Services/MediaPlayer/MediaPlayerProviderProtocol.swift

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+//
+// Copyright 2023 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
+
+protocol MediaPlayerProviderProtocol {
+    func player(for mediaSource: MediaSourceProxy) async -> MediaPlayerProtocol?
+}