mic_stream 0.7.0-dev

A plugin to receive raw byte streams from a device's microphone. Audio is returned as `Stream<Uint8list>`.

mic_stream: 0.7.0-dev

[Flutter Plugin] Provides a tool to get the microphone input as 8 or 16 bit PCM Stream.

About mic_stream:

As Flutter still lacks some functionality, this plugin aims to provide the possibility to easily get an audio stream from the microphone of mobile devices.

How to use:

The plugin provides one method:

Stream<UInt8List> MicStream.microphone({options})

Listening to this stream starts the audio recorder while cancelling the subscription stops the stream.

Available options are as follows:

audioSource: AudioSource      // The microphone you want to record from
sampleRate: int               // The amount of data points to record per second
channelConfig: ChannelConfig  // Mono or Stereo
audioFormat: AudioFormat      // 8 bit PCM or 16 bit PCM. Other formats are not yet supported

The plugin also provides information about some properties:

Future<double> sampleRate = await MicStream.sampleRate;
Future<int> bitDepth = await MicStream.bitDepth;
Future<int> bufferSize = await MicStream.bufferSize;

Permissions

Make sure you have microphone recording permissions enabled for your project. To do so, add this line to the AndroidManifest.xml:

<uses-permission android:name="android.permission.RECORD_AUDIO"/>

In the Info.plist:

<key>NSMicrophoneUsageDescription</key>
<string>Microphone access required</string>

For MacOS:

Open macos/Runner.xcworkspace click Runner -> Signing & Capabilities -> Check "Audio Input"

Example:

// Init a new Stream
Stream<List<int>> stream = await MicStream.microphone(sampleRate: 44100);

// Start listening to the stream
StreamSubscription<List<int>> listener = stream.listen((samples) => print(samples));

// Cancel the subscription
listener.cancel()

Note: This plugin is still under development, and some APIs might not be available yet. Feedback and Pull Requests are most welcome!