AudioStreamer

AudioStreamer is a Flutter plugin for Windows that enables low-latency audio recording using the native Media Foundation API.

🎙️ Recording via WebSocket and microphone.
🔊 Playback via WebSocket and speakers.

✨ Features

Start, pause, resume, and stop recording
Access available microphone devices
Native implementation using C++ and Media Foundation
No external dependencies
Windows-only support

🎙️ Voice Processing Support (AEC, NS, AGC)

This project uses Media Foundation to capture microphone input and includes support for:

🎧 Acoustic Echo Cancellation (AEC)
🔇 Noise Suppression (NS)
🎚️ Automatic Gain Control (AGC)

Audio Renderer Attributes – Win32 apps | Microsoft Learn MF_AUDIO_RENDERER_ATTRIBUTE_FLAGS attribute | Microsoft Learn Alphabetical List of Media Foundation Attributes (https://learn.microsoft.com/en-us/windows/win32/medfound/alphabetical-list-of-media-foundation-attributes)

🚀 Getting Started

Add the plugin to your Flutter project:

dependencies:
  audiostreamer:
    path: ../audiostreamer

Then run:

flutter pub get

Usage

import 'package:audiostreamer/mediarecorder.dart';

final recorder = MediaRecorder();
await record.listDevices()
await record.isReady;
...

final player = MediaPlayer();
await player.listDevices()
await player.isReady;
...

Testing the Plugin

If you're testing the plugin from source:

flutter config --enable-windows-desktop
flutter create example
cd example

# Add the plugin from local path
flutter pub add audiostreamer --path=../

# Optional: Add WebSocket and dev dependencies
flutter pub add web_socket_channel
flutter pub add plugin_platform_interface --dev

flutter clean
flutter pub get
flutter run -d windows

See the example/ directory for a working Flutter app that demonstrates plugin usage.

Plugin Development Notes

If you're contributing to this plugin:

Comment out the plugin block in pubspec.yaml to allow re-creating the scaffold:

#flutter:
#  plugin:
#    platforms:
#      windows:
#        pluginClass: AudioStreamerPlugin

Delete the existing example folder if needed.
Recreate project scaffolding:

flutter config --enable-windows-desktop
flutter create .
flutter clean
flutter pub get
flutter run -d windows

Windows Notes

This plugin uses the native Windows Media Foundation API for:

Low-latency audio capture
High performance
Native device access without third-party libraries

License

This project is licensed under the MIT License.