CATTY-684 Add body pose detection support for older iOS versions

src/Catty/PlayerEngine/Sensors/BodyPose/PoseNetModel.swift

@@ -0,0 +1,53 @@
+/**
+ *  Copyright (C) 2010-2023 The Catrobat Team
+ *  (http://developer.catrobat.org/credits)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  An additional term exception under section 7 of the GNU Affero
+ *  General Public License, version 3, is available at
+ *  (http://developer.catrobat.org/license_additional_term)
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see http://www.gnu.org/licenses/.
+ */
+
+enum PoseNetModel {
+    public static let stride = 8.0
+    public static let inputDimension = 513.0
+
+    enum OutputIndex: Int {
+        case displacementBwd
+        case heatmaps
+        case displacementFwd
+        case offsets
+    }
+
+    enum Features: Int {
+        case nose
+        case leftEye
+        case rightEye
+        case leftEar
+        case rightEar
+        case leftShoulder
+        case rightShoulder
+        case leftElbow
+        case rightElbow
+        case leftWrist
+        case rightWrist
+        case leftHip
+        case rightHip
+        case leftKnee
+        case rightKnee
+        case leftAnkle
+        case rightAnkle
+    }
+}