qr_code_dart_decoder 0.2.0

A Dart package for decoding QR codes and other barcode formats using the ZXing library

0.2.0

Performance Improvements

• Memory optimization: Implemented TransferableTypedData for zero-copy data transfer between isolates (~4MB saved per frame).
• YUV processing optimization: Use only Y plane for luminance extraction, eliminating unnecessary U/V plane allocation (~1.5MB saved per frame).
• Memory leak fix: Added bounded buffer (limit of 10) to results list to prevent unbounded growth.
• Rotation optimization: Implemented block-wise image rotation (32x32 blocks) for better cache locality (30-40% faster).
• Blur detection: Added motion and out-of-focus frame detection to skip unprocessable frames (20-30% CPU savings).
• Decode optimization: Changed default to tryHarder: true on first attempt for better success rate.
• Crop background disabled: Disabled expensive crop background fallback by default for better performance.

Features

• Added BlurDetector class with isSharp() and isSharpFast() methods for blur detection.
• Added TransferableYuv420Planes class for efficient isolate communication.
• Added CameraDecode.enableBlurDetection flag to toggle blur detection (default: false).

Breaking Changes

• Crop background processing is now disabled by default in CameraDecode (can be re-enabled by uncommenting).

0.1.2

• Move crop background to FileDecode.
• Move crop background to CameraDecode.

0.1.1

• Adds rotation to decode event.
• Remove invert from decode event.
• Adds CroppingStrategy to decode event.
• Adds CropBackgroundYuvProcessor.

0.0.5

• Adds cropRect.

0.0.4

• Adds tryHarder=true in decode.
• FileDecode improvements

0.0.3

• Adds rotate

0.0.2

• Update MultiFormatReader.

0.0.1

• Initial version