uMicrophoneWebGL
================

**uMicrophoneWebGL** enables microphone input buffer access in Unity WebGL builds.


## Demo

### Recorder

<img src="https://raw.githubusercontent.com/wiki/hecomi/uMicrophoneWebGL/uMicrophoneWebGL-Recorder.gif" width="640" />

### Waveform

<img src="https://raw.githubusercontent.com/wiki/hecomi/uMicrophoneWebGL/uMicrophoneWebGL-Waveform.gif" width="640" />


## Installation

- **Unity Package**
  - Download the latest .unitypackage from the [Release page](https://github.com/hecomi/uMicrophoneWebGL/releases).
- **Git URL (UPM)**
  - Add `https://github.com/hecomi/uMicrophoneWebGL.git#upm` to the Package Manager.
- **Scoped Registry (UPM)**
  - Add a scoped registry to your project.
    - URL: `https://registry.npmjs.com`
    - Scope: `com.hecomi`
  - Install uMicrophoneWebGL in the Package Manager.


## MicrophoneWebGL Component

Attach `MicrophoneWebGL` component to a GameObject. Once attached, the following UI will be displayed:

<img src="https://raw.githubusercontent.com/wiki/hecomi/uMicrophoneWebGL/uMicrophoneWebGL-UI.png" width="640" />

- **Is Auto Start**
  - When checked, data collection from the microphone starts automatically at launch.
- **Devices**
  - Called when a list of devices is constructed.
  - Internally managed by indices (int).
  - It's often unclear which device the user has selected, so it is advised to use this only for debugging purposes. Instead, provide a device selection UI at runtime, as demonstrated in the Recorder example.
- **Events**
  - Various events can be captured:
  - **Ready Event**
    - Called once after initialization on the JavaScript side and everything is ready.
  - **Device List Event**
    - Called when the device list is constructed.
    - A list containing device information is passed as an argument.
  - **Start Event**
    - Called when a microphone starts.
    - Internally, this corresponds to the completion of `navigator.mediaDevices.getUserMedia()`.
  - **End Event**
    - Called when a microphone stops.
  - **Data Event**
    - Called when microphone input buffer data is retrieved.
    - An array of float waveform data is passed as an argument.

## API Reference

`MicrophoneWebGL` component provides the following properties and methods:

### Variables / Properties

- `bool isAutoStart`
    - Corresponds to the Is Auto Start option in the UI. If true, the microphone starts automatically at launch.

- `int micIndex`
    - Index of the selected microphone device.

- `TimingEvent readyEvent`
    - Event triggered when the microphone is ready after initialization.

- `TimingEvent startEvent`
    - Event triggered when the microphone starts recording.

- `TimingEvent stopEvent`
    - Event triggered when the microphone stops recording.

- `DeviceListEvent deviceListEvent`
    - Event triggered when the list of available devices is updated.

- `DataEvent dataEvent`
    - Event triggered when microphone data is available.

- `bool isValid { get; }`
    - Indicates whether the microphone is in a valid state to be used.

- `List<Device> devices { get; }`
    - List of available microphone devices.

- `Device selectedDevice { get; }`
    - Information about the currently selected microphone device.

- `bool isRecording { get; }`
    - Indicates whether the microphone is currently recording.

### Methods

- `void Begin()`
    - Starts the microphone. Does nothing if the microphone is recording.

- `void End()`
    - Stops the microphone. Does nothing if the microphone is not recording.

- `void RefreshDeviceList()`
    - Refreshes the list of microphone devices. The Device List Event is triggered again at the end of the update.