microphone_dart 0.0.1

Microphone recording for Dart and Flutter with the goal of no additional system dependencies. Dart (no Flutter dependency) with native audio from Rust via FFI.

Changelog

0.0.1

• Initial scaffolding.
• Core API: Microphone, CaptureFormat, Recording, pluggable CaptureBackends.
• Recording exposes both a live PCM frames stream and stop, which returns the capture as WAV (RIFF) bytes; stopToFile writes a WAV on native platforms.
• Pure-Dart WAV writer (wavFromPcm); captured audio is S16LE PCM.
• SilentBackend fallback that captures silence, so the API and tests run without a microphone. Web-safe via conditional imports.
• FFI backend that captures via the native microphone Rust library, draining S16LE PCM into the frames stream and an accumulating buffer. Capture works on macOS and iOS (CoreAudio AudioQueue input) and Android (AAudio input).
• Web capture backend (getUserMedia + Web Audio).
• AudioLevel (RMS/peak, with dBFS) and a Recording.levels() stream for live input metering.
• Native pause/resume that drops audio captured while paused (no silent gap).
• Input device enumeration (Microphone.devices(), CaptureDevice) and selection (record(deviceId: ...)). macOS lists/selects via CoreAudio; the web via getUserMedia/enumerateDevices.
• Configurable sample rate / channels honored where the platform supports it (macOS verified for 8/16/44.1/48 kHz, mono and stereo); resample policy documented on CaptureFormat.