Time Compression Average #64
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WalkthroughAdds Changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Possibly related PRs
Pre-merge checks and finishing touches✅ Passed checks (2 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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🚧 Files skipped from review as they are similar to previous changes (1)
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Actionable comments posted: 1
🧹 Nitpick comments (2)
PhotoLocator/BitmapOperations/TimeCompressionAverageOperation.cs (1)
21-21: Consider using exact equality check.The condition uses
>=but_collectedFramesis always incremented by 1 and should never exceed_numberOfFramesToAverage. While>=provides defensive programming, using==would make the intent clearer and catch logic errors faster.🔎 Proposed change
-if (_collectedFrames >= _numberOfFramesToAverage) +if (_collectedFrames == _numberOfFramesToAverage)PhotoLocator/VideoTransformCommands.cs (1)
701-702: LGTM!The conditional logic correctly skips the
setptsfilter when using time compression averaging, since the speedup is inherent in the operation (every N frames → 1 output frame). This aligns with the operation selection logic at lines 1089-1091.Optional: Consider extending optimization to other combine modes.
The time compression optimization is currently only applied to
RollingAveragemode (lines 1089-1091, 701). CouldFadingAverageandFadingMaxalso benefit from similar optimization whenSpeedupByEqualsCombineFramesCount?
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Review profile: CHILL
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📒 Files selected for processing (3)
PhotoLocator/BitmapOperations/CombineFramesOperationBase.csPhotoLocator/BitmapOperations/TimeCompressionAverageOperation.csPhotoLocator/VideoTransformCommands.cs
🧰 Additional context used
🧬 Code graph analysis (1)
PhotoLocator/VideoTransformCommands.cs (5)
PhotoLocator/RenameWindow.xaml.cs (1)
SetProperty(76-83)PhotoLocator/SlideShowWindow.xaml.cs (1)
SetProperty(70-77)PhotoLocator/MainViewModel.cs (1)
SetProperty(57-64)PhotoLocator/BitmapOperations/TimeCompressionAverageOperation.cs (2)
TimeCompressionAverageOperation(6-36)TimeCompressionAverageOperation(11-15)PhotoLocator/BitmapOperations/RollingAverageOperation.cs (2)
RollingAverageOperation(8-36)RollingAverageOperation(13-18)
🔇 Additional comments (11)
PhotoLocator/BitmapOperations/CombineFramesOperationBase.cs (1)
62-63: LGTM!The
IsResultReadyproperty cleanly exposes readiness state without leaking internal implementation details. The virtual modifier appropriately allows derived classes likeTimeCompressionAverageOperationto provide custom readiness logic.PhotoLocator/BitmapOperations/TimeCompressionAverageOperation.cs (3)
17-17: LGTM!The override correctly implements the readiness check for time compression averaging. The result is only ready after collecting exactly the target number of frames, which properly coordinates with the processing pipeline in
VideoTransformCommands.cs(lines 1104-1105).
32-35: LGTM!The scaling factor correctly implements averaging. Ensure the constructor validation (flagged earlier) is added to prevent division by zero.
24-24: No action needed. The project targets.NET 10.0(net10.0-windows), which is well beyond .NET 5.0 where the single-parameterArray.Clearoverload was introduced. The code is correct and compatible with the target framework.PhotoLocator/VideoTransformCommands.cs (7)
269-269: LGTM!Adding
UpdateStabilizeArgs()when the effect changes ensures that effect-specific stabilization adjustments (like skipping scaling for the Zoom effect at line 670) are applied correctly.
408-412: LGTM!The clamping of
CombineFramesCountto a minimum of 1 is good defensive programming that prevents invalid configurations and aligns with the requirements ofTimeCompressionAverageOperation.
670-670: LGTM!The Zoom effect handling is consistent across both
UpdateStabilizeArgs()andUpdateProcessArgs(). Skipping manual scaling and FPS filtering when Zoom is selected is correct since the Zoom effect (line 236) manages these parameters internally.Also applies to: 688-688, 703-703
1089-1091: LGTM!The conditional selection between
TimeCompressionAverageOperationandRollingAverageOperationis well-designed. Using time compression when the speedup factor matches the combine frames count is more efficient than maintaining a rolling window.
1104-1105: LGTM!The
IsResultReadycheck is essential for coordinating withTimeCompressionAverageOperation, which only produces a result after collecting all target frames. This correctly implements the time compression behavior by skipping intermediate frames.
1125-1126: LGTM!The helper property cleanly encapsulates the speedup comparison logic and is used consistently throughout the file (lines 701, 1089). The
TryParseapproach gracefully handles invalid input.
1142-1144: LGTM!The postfix naming logic now explicitly includes
IsStabilizeCheckedwith theSmoothFramesparameter, providing clearer output file naming. The fallback to line 1144 still handles registration-only cases.
| public TimeCompressionAverageOperation(int numberOfFramesToAverage, string? darkFramePath, CombineFramesRegistration? registrationSettings, CancellationToken ct) | ||
| : base(darkFramePath, registrationSettings?.ToCombineFramesRegistrationBase(RegistrationOperation.Borders.Mirror), ct) | ||
| { | ||
| _numberOfFramesToAverage = numberOfFramesToAverage; | ||
| } |
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Validate numberOfFramesToAverage parameter.
The constructor doesn't validate that numberOfFramesToAverage is positive. If it's zero or negative, this will cause issues:
- Zero would cause division by zero in
GetResultScaling()(line 34) - Zero or negative values would break the readiness logic in
IsResultReady(line 17)
🔎 Proposed fix
public TimeCompressionAverageOperation(int numberOfFramesToAverage, string? darkFramePath, CombineFramesRegistration? registrationSettings, CancellationToken ct)
: base(darkFramePath, registrationSettings?.ToCombineFramesRegistrationBase(RegistrationOperation.Borders.Mirror), ct)
{
+ if (numberOfFramesToAverage <= 0)
+ throw new ArgumentOutOfRangeException(nameof(numberOfFramesToAverage), "Must be greater than zero");
_numberOfFramesToAverage = numberOfFramesToAverage;
}🤖 Prompt for AI Agents
In PhotoLocator/BitmapOperations/TimeCompressionAverageOperation.cs around lines
11 to 15, the constructor does not validate numberOfFramesToAverage allowing
zero or negative values which will lead to division by zero and incorrect
readiness logic; fix by validating that numberOfFramesToAverage is > 0 at the
start of the constructor and throw an ArgumentOutOfRangeException (or
ArgumentException) with the parameter name if the check fails, and only assign
_numberOfFramesToAverage after the validation.
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New Features
Bug Fixes
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