Add IsVideoUpscaled property to IVideoStreamInfo to detect AI-upscaled streams

[Copilot]

• Fix IsVideoUpscaled detection: use xtags protobuf "sr" key instead of quality label
• Move IsVideoUpscaled from VideoQuality to IVideoStreamInfo and its implementations
• Refactor xtags parsing: replace raw byte scan with a proper protobuf map parser
• Extract protobuf parsing into Utils.Protobuf returning IReadOnlyDictionary<string, string?>
• Rename TryDeserialize → TryDeserializeMap to make intent clear
• Change TryReadVarint and TryReadString to return nullable values instead of out params + bool
• Sort overloads so primary TryReadVarint + TryDeserializeMap(byte[]) appear before the caller TryDeserializeMap(string)
• Use GetValueOrDefault instead of TryGetValue in PlayerResponse
• Add IsLenField(ulong tag) helper for wire-type 2 checks in Protobuf
• Add TryReadString helper for string field reading in Protobuf
• Use var everywhere in Protobuf.cs
• Rename IsUpscaled → IsVideoUpscaled in IVideoStreamInfo, VideoOnlyStreamInfo, MuxedStreamInfo, and tests
• Revert unnecessary change in VideoQuality.FromItag (back to 2-param constructor)
• Move IsVideoUpscaled to after VideoHeight (and before VideoFramerate) in IStreamData, PlayerResponse.StreamData, and DashManifest.StreamData; already after VideoResolution in IVideoStreamInfo, VideoOnlyStreamInfo, and MuxedStreamInfo
• Add backwards-compatible constructor overloads to VideoOnlyStreamInfo and MuxedStreamInfo (without isVideoUpscaled, defaulting to false)

[Tyrrrz]

@copilot tests are failing. Are you sure Label is meant to contain AI?

If I had to guess, the new metadata should be inside the player response. Try changing the code to dump the response to a file and analyze it to find if there's anything related to upscaling, super-resolution, or AI enhansion.

[Copilot]

@copilot tests are failing. Are you sure Label is meant to contain AI?

If I had to guess, the new metadata should be inside the player response. Try changing the code to dump the response to a ...

You were right — the quality label stays plain (e.g. "1080p") with no "AI" suffix. The actual marker is the xtags field in the format object, which is a base64-encoded protobuf map<string, string>. For AI super-resolution streams it contains the entry {"sr": "1"}, while non-upscaled streams have no xtags field at all (confirmed by the player response JSON you shared).

Fixed in fa0fe12: IsVideoUpscaled is now detected by decoding the xtags base64 bytes and scanning for the protobuf-encoded "sr" key (0x0a 0x02 0x73 0x72). VideoQuality.IsUpscaled is now a stored boolean populated from that flag rather than a label-string check.

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• av-build-tel-api-v1.avaloniaui.net
  • Triggering command: /usr/share/dotnet/dotnet dotnet exec --runtimeconfig /home/REDACTED/.nuget/packages/avalonia.buildservices/11.3.2/tools/netstandard2.0/runtimeconfig.json /home/REDACTED/.nuget/packages/avalonia.buildservices/11.3.2/tools/netstandard2.0/Avalonia.BuildServices.Collector.dll (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[Copilot]

Pull request overview

Copilot reviewed 10 out of 10 changed files in this pull request and generated 3 comments.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (33eef87) to head (f55b58a).
⚠️ Report is 1 commits behind head on prime.

Additional details and impacted files

@@     Coverage Diff      @@
##   prime   #950   +/-   ##
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