boat 1.0.0-preview.1

Production-grade realtime voice and audio engine for Flutter with OS-level AEC, AGC, and noise suppression. Optimized for speaker mode where acoustic echo cancellation is critically needed.

1.0.0-preview.1

Documentation

• Rewrote the public (pub.dev) and repository READMEs following the Circuids package style — centered logo, table of contents, problem-first narrative, full API reference, architecture diagram, and design philosophy.
• Added a Rejected Approaches section documenting tried-and-discarded architectures (WebRTC client-side loop, manual echo reference feeding, Flutter-level DSP, permission_handler, separate playback class, and others) so the design rationale is visible.
• Added the full Apache License 2.0 text to LICENSE and a trademark policy in TRADEMARKS.md.
• Added the cover logo to both READMEs.

No public API or platform channel changes.

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1.0.0-preview

Initial Release

Boat — production-grade realtime voice and audio engine for Flutter, optimized for speaker mode where AEC is critically needed.

Features

• Audio Capture — 16-bit PCM via platform-native APIs with OS-level processing
• Audio Playback — Low-latency, AEC-coupled playback through the engine
• Acoustic Echo Cancellation (AEC) — OS-level (Android AudioEffects, iOS voiceChat mode)
• Automatic Gain Control (AGC) — Level normalization for consistent audio
• Noise Suppression (NS) — Environmental noise reduction
• Unified Engine — Single BoatEngine for capture + playback (no separate playback class)
• Hot Reconfiguration — Change sample rate, effects, or route without full restart
• Audio Routing — Speaker / earpiece / Bluetooth / wired headset
• Lifecycle Management — start / stop / pause / resume / dispose
• State Observation — Stream-based typed events (BoatEvent sealed hierarchy)
• Diagnostics API — Device info, effect status, session statistics
• Typed Exceptions — BoatConfigException, BoatPermissionException, BoatNativeException, BoatStateException

Architecture Highlights

• OS audio stack is the authority — no software DSP, no WebRTC
• Shared audio session between capture and playback for AEC correlation
• VOICE_COMMUNICATION source on Android (only source with AEC coupling)
• AVAudioSession voiceChat mode on iOS (implicit voice processing)
• Dual-platform from v1.0 (Android API 23+, iOS 13.0+)