flutter_audio_capture

Capture the audio stream buffer through microphone for iOS/Android. Required OS version is iOS 12+ or Android 23+

Getting Started

Add this line to your pubspec.yaml file:

dependencies:
  flutter_audio_capture: ^0.0.1

and execute

$ flutter pub get

If you want to use this package on Android OS, you need to set RECORD_AUDIO permission to AndroindManifest.xml like below.

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.ymd.flutter_audio_capture">
  ...
  // Add this line
  <uses-permission android:name="android.permission.RECORD_AUDIO"/>
</manifest>

If you want to use this package on iOS, you need to set NSMicrophoneUsageDescription to Info.plist like below.

<dict>
    <key>NSMicrophoneUsageDescription</key>
    <string>Need microphone access to capture audio</string>
...

Example

You can see full example in example/lib/main.dart

import 'package:flutter_audio_capture/flutter_audio_capture.dart';
...

// Callback function if device capture new audio stream.
// argument is audio stream buffer captured through mictophone.
// Currentry, you can only get is as Float64List.
void listener(dynamic obj) {
  var buffer = Float64List.fromList(obj.cast<double>());
  print(buffer);
}

// Callback function if flutter_audio_capture failure to register
// audio capture stream subscription.
void onError(Object e) {
  print(e);
}

...

FlutterAudioCapture plugin = new FlutterAudioCapture();
// Start to capture audio stream buffer
// sampleRate: sample rate you want (Android only)
// bufferSize: buffer size you want (iOS only)
await plugin.start(listener, onError, sampleRate: 16000, bufferSize: 3000);
// Stop to capture audio stream buffer
await plugin.stop();

Libraries

flutter_audio_capture

Dart

dart:ui
Built-in types and core primitives for a Flutter application. [...]

Core

dart:async
Support for asynchronous programming, with classes such as Future and Stream. [...]
dart:collection
Classes and utilities that supplement the collection support in dart:core. [...]
dart:convert
Encoders and decoders for converting between different data representations, including JSON and UTF-8. [...]
dart:core
Built-in types, collections, and other core functionality for every Dart program. [...]
dart:developer
Interact with developer tools such as the debugger and inspector. [...]
dart:math
Mathematical constants and functions, plus a random number generator. [...]
dart:typed_data
Lists that efficiently handle fixed sized data (for example, unsigned 8 byte integers) and SIMD numeric types. [...]

VM

dart:ffi
Foreign Function Interface for interoperability with the C programming language. [...]
dart:io
File, socket, HTTP, and other I/O support for non-web applications. [...]
dart:isolate
Concurrent programming using isolates: independent workers that are similar to threads but don't share memory, communicating only via messages. [...]

Web

dart:html
HTML elements and other resources for web-based applications that need to interact with the browser and the DOM (Document Object Model). [...]
dart:js
Low-level support for interoperating with JavaScript. [...]
dart:js_util
Utility methods to efficiently manipulate typed JSInterop objects in cases where the name to call is not known at runtime. You should only use these methods when the same effect cannot be achieved with @JS annotations. These methods would be extension methods on JSObject if Dart supported extension methods.