pro_miniaudio 0.0.4

A Flutter plugin for miniaudio.

pro_miniaudio

A Flutter plugin for managing contexts, playback devices, and waveform generation via Dart FFI.

Features

• Manage audio contexts for device initialization and control.
• Query playback and capture devices.
• Generate and play waveforms (sine, square, sawtooth, triangle).
• Push audio buffers to playback devices for custom playback.

Getting Started

This plugin uses Dart's Foreign Function Interface (FFI) to communicate with native C libraries. It provides an easy-to-use Dart API for managing audio playback and waveform generation.

Installation

Add the following to your pubspec.yaml:

dependencies:
  pro_miniaudio: 0.0.4

Context

The Context class manages the initialization and querying of audio devices.

Example: Initialize and Query Devices

import 'package:pro_miniaudio/pro_miniaudio.dart';

void main() {
  final context = Context();

  // Refresh and get devices
  final devices = context.refreshAndReturnDevices();
  print('Playback Devices: ${devices.playback.length}');
  print('Capture Devices: ${devices.capture.length}');

  // Clean up
  context.dispose();
}

PlaybackDevice

The PlaybackDevice class manages audio playback, including starting, stopping, and pushing audio buffers.

Example: Create and Play Audio

import 'dart:typed_data';
import 'package:pro_miniaudio/pro_miniaudio.dart';

void main() {

  final device = PlaybackDevice(
    deviceId: 0, // Use default device
    bufferSizeInBytes: 4096,
    format: SupportedFormat(
      channels: 2,
      sampleRate: 44100,
      format: SampleFormat.f32,
    ),
  );

  // Generate a sample audio buffer (stereo sine wave)
  final result = waveform.readWaveformPcmFrames(frameCount: 1024)

  // Push the buffer to the device
  device.pushBuffer(buffer: result.frames, framesCount: 44100);

  // Start playback
  device.start();

  // Stop playback after some time (not shown)
  device.stop();

  // Clean up
  device.dispose();
}

Waveform

The Waveform class provides an easy way to generate audio waveforms like sine, square, sawtooth, and triangle.

Example: Generate a Sine Wave

import 'dart:typed_data';
import 'package:pro_miniaudio/pro_miniaudio.dart';

void main() {
  final waveform = Waveform(
    config: WaveformSineConfig(
      format: SampleFormat.f32,
      sampleRate: 44100,
      channels: 2,
      amplitude: 0.5,
      frequency: 440.0,
    ),
  );

  // Read PCM frames
  final result = waveform.readWaveformPcmFrames(frameCount: 1024);
  print('Read ${result.framesRead} frames');
  print('Buffer length: ${result.frames.length}');

  // Clean up
  waveform.dispose();
}