Resolution switching support

Model/Stream.swift

@@ -0,0 +1,29 @@
+import AVFoundation
+import Foundation
+
+// swiftlint:disable:next final_class
+class Stream: Equatable {
+    var audioAsset: AVURLAsset
+    var videoAsset: AVURLAsset
+
+    var resolution: StreamResolution
+    var type: StreamType
+
+    var encoding: String
+
+    init(audioAsset: AVURLAsset, videoAsset: AVURLAsset, resolution: StreamResolution, type: StreamType, encoding: String) {
+        self.audioAsset = audioAsset
+        self.videoAsset = videoAsset
+        self.resolution = resolution
+        self.type = type
+        self.encoding = encoding
+    }
+
+    var description: String {
+        "\(resolution.height)p"
+    }
+
+    static func == (lhs: Stream, rhs: Stream) -> Bool {
+        lhs.resolution == rhs.resolution && lhs.type == rhs.type
+    }
+}