58 lines
1.8 KiB
Dart
58 lines
1.8 KiB
Dart
import 'dart:typed_data';
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import 'package:flutter/widgets.dart';
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/// One frame of scrub-bar preview imagery, produced by a
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/// [ScrubPreviewSource] for a given timestamp.
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///
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/// Plex's BIF returns standalone JPEG bytes per timestamp.
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/// Jellyfin's Trickplay returns a sprite-sheet URL plus the row/column of
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/// the right tile. The tooltip sizes itself to [aspectRatio] so the frame
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/// renders without letterboxing or cropping.
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sealed class ScrubFrame {
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const ScrubFrame();
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/// Source frame aspect ratio (width / height). The tooltip uses this to
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/// pick its own height; the renderer assumes the box already matches.
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double get aspectRatio;
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}
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/// Plex BIF: standalone JPEG bytes ready for [Image.memory].
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class BytesScrubFrame extends ScrubFrame {
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final Uint8List bytes;
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@override
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final double aspectRatio;
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const BytesScrubFrame(this.bytes, {this.aspectRatio = 16 / 9});
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}
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/// Jellyfin Trickplay: a single sprite sheet plus the position of the tile
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/// to display within it. Aspect comes from [sourceTileSize]; the tooltip
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/// adopts that aspect so each source tile fills the box exactly.
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class SheetScrubFrame extends ScrubFrame {
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final ImageProvider sheet;
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final int tileColumn;
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final int tileRow;
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final int sheetColumns;
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final int sheetRows;
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final Size sourceTileSize;
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const SheetScrubFrame({
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required this.sheet,
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required this.tileColumn,
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required this.tileRow,
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required this.sheetColumns,
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required this.sheetRows,
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required this.sourceTileSize,
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});
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@override
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double get aspectRatio => sourceTileSize.width / sourceTileSize.height;
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}
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/// Backend-neutral source of [ScrubFrame]s for the timeline tooltip.
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/// Plex implements via BIF bytes; Jellyfin via Trickplay sheet crops.
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abstract class ScrubPreviewSource {
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bool get isAvailable;
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ScrubFrame? getFrame(Duration time);
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void dispose();
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}
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