66 lines
2.2 KiB
Dart
66 lines
2.2 KiB
Dart
/// Video transcode quality presets modeled on Plex Web's custom-quality table.
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///
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/// When a non-[original] preset is selected, playback asks the active backend
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/// for a capped transcode stream. [original] bypasses transcoding entirely and
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/// uses the direct-play URL.
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enum TranscodeQualityPreset {
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original(null, null, null),
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p240_320(320, '420x240', 30),
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p320_720(720, '576x320', 40),
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p480_1_5mbps(1500, '720x480', 60),
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p720_2mbps(2000, '1280x720', 60),
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p720_3mbps(3000, '1280x720', 75),
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p720_4mbps(4000, '1280x720', 100),
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p1080_8mbps(8000, '1920x1080', 60),
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p1080_10mbps(10000, '1920x1080', 75),
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p1080_12mbps(12000, '1920x1080', 90),
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p1080_20mbps(20000, '1920x1080', 100);
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const TranscodeQualityPreset(this.videoBitrateKbps, this.videoResolution, this.videoQuality);
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final int? videoBitrateKbps;
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final String? videoResolution;
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final int? videoQuality;
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bool get isOriginal => this == TranscodeQualityPreset.original;
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String get storageKey => name;
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static TranscodeQualityPreset fromStorage(String? stored) {
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if (stored == null) return TranscodeQualityPreset.original;
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for (final v in TranscodeQualityPreset.values) {
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if (v.name == stored) return v;
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}
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return TranscodeQualityPreset.original;
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}
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/// Resolution height (e.g. 720, 1080) parsed from [videoResolution]. Null for original.
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int? get resolutionHeight {
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final r = videoResolution;
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if (r == null) return null;
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final parts = r.split('x');
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if (parts.length != 2) return null;
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return int.tryParse(parts[1]);
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}
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/// Order shared by every picker surface so they can't drift apart:
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/// [original] pinned first, then transcode presets highest-bitrate first.
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static final List<TranscodeQualityPreset> displayOrder = List.unmodifiable([
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original,
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...values.where((p) => !p.isOriginal).toList().reversed,
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]);
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}
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/// Outcome of a transcode decision call.
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enum TranscodeDecisionOutcome {
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/// Decision indicates transcode is available (`transcodeDecisionCode == 1001`).
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transcodeOk,
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/// Decision indicates only direct play is available (`transcodeDecisionCode == 1000`).
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/// Caller should fall back to the direct-play URL.
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directPlayOnly,
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/// Decision failed (HTTP error, code >= 2000, or parse error).
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failed,
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}
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