Add iOS

ios/Parsers/AVCaptureSession.Preset+descriptor.swift

@@ -0,0 +1,55 @@
+//
+//  AVCaptureSession.Preset+descriptor.swift
+//  Cuvent
+//
+//  Created by Marc Rousavy on 15.12.20.
+//  Copyright © 2020 Facebook. All rights reserved.
+//
+
+import AVFoundation
+import Foundation
+
+extension AVCaptureSession.Preset {
+  init(withString string: String) throws {
+    switch string {
+    case "cif-352x288":
+      self = .cif352x288
+      return
+    case "hd-1280x720":
+      self = .hd1280x720
+      return
+    case "hd-1920x1080":
+      self = .hd1920x1080
+      return
+    case "hd-3840x2160":
+      self = .hd4K3840x2160
+      return
+    case "high":
+      self = .high
+      return
+    case "iframe-1280x720":
+      self = .iFrame1280x720
+      return
+    case "iframe-960x540":
+      self = .iFrame960x540
+      return
+    case "input-priority":
+      self = .inputPriority
+      return
+    case "low":
+      self = .low
+      return
+    case "medium":
+      self = .medium
+      return
+    case "photo":
+      self = .photo
+      return
+    case "vga-640x480":
+      self = .vga640x480
+      return
+    default:
+      throw EnumParserError.invalidValue
+    }
+  }
+}