Init repo

lib/models/items/trick_play_model.dart

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+import 'dart:ui';
+
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'trick_play_model.freezed.dart';
+part 'trick_play_model.g.dart';
+
+@freezed
+class TrickPlayModel with _$TrickPlayModel {
+  factory TrickPlayModel({
+    required int width,
+    required int height,
+    required int tileWidth,
+    required int tileHeight,
+    required int thumbnailCount,
+    required Duration interval,
+    @Default([]) List<String> images,
+  }) = _TrickPlayModel;
+
+  const TrickPlayModel._();
+
+  int get imagesPerTile => tileWidth * tileHeight;
+
+  String? getTile(Duration position) {
+    final int currentIndex = (position.inMilliseconds ~/ interval.inMilliseconds).clamp(0, thumbnailCount);
+    final int indexOfTile = (currentIndex ~/ imagesPerTile).clamp(0, images.length);
+    return images.elementAtOrNull(indexOfTile);
+  }
+
+  Offset offset(Duration position) {
+    final int currentIndex = (position.inMilliseconds ~/ interval.inMilliseconds).clamp(0, thumbnailCount - 1);
+    final int tileIndex = currentIndex % imagesPerTile;
+    final int column = tileIndex % tileWidth;
+    final int row = tileIndex ~/ tileWidth;
+    return Offset((width * column).toDouble(), (height * row).toDouble());
+  }
+
+  static Map<String, TrickPlayModel> toTrickPlayMap(Map<String, dynamic> map) {
+    Map<String, TrickPlayModel> newMap = {};
+    final firstMap = (((map.entries.first as MapEntry).value as Map<String, dynamic>));
+    newMap.addEntries(firstMap.entries.map(
+      (e) {
+        final map = e.value as Map<String, dynamic>;
+        return MapEntry(
+          e.key,
+          TrickPlayModel(
+            width: map['Width'] as int? ?? 0,
+            height: map['Height'] as int? ?? 0,
+            tileWidth: map['TileWidth'] as int? ?? 0,
+            tileHeight: map['TileHeight'] as int? ?? 0,
+            thumbnailCount: map['ThumbnailCount'] as int? ?? 0,
+            interval: Duration(milliseconds: map['Interval'] as int? ?? 0),
+          ),
+        );
+      },
+    ));
+    return newMap;
+  }
+
+  factory TrickPlayModel.fromJson(Map<String, dynamic> json) => _$TrickPlayModelFromJson(json);
+}