A NatMic audio recorder capable of streaming microphone audio to an AudioClip in realtime.

RealtimeClip.cs

/* 
*   NatMic
*   Copyright (c) 2019 Yusuf Olokoba
*/

namespace NatMic.Recorders {

    using UnityEngine;
    using System.Runtime.CompilerServices;
    using Docs;

    /// <summary>
    /// A recorder that doubles as a realtime AudioClip
    /// </summary>
    public sealed class RealtimeClip : IAudioRecorder {

        #region --Client API--
        /// <summary>
        /// Create a realtime clip
        /// </summary>
        public RealtimeClip (int sampleRate, int channelCount) {
            stream = new AudioStream();
            clip = AudioClip.Create("NatMic Realtime Clip", int.MaxValue, channelCount, sampleRate, true, OnAudioDataRead);
        }

        /// <summary>
        /// Destroy the realtime clip
        /// </summary>
        public void Dispose () {
            AudioClip.Destroy(clip);
            clip = null;
        }
        #endregion


        #region --Operations--

        private AudioClip clip;
        private AudioStream stream;
    
        void IAudioProcessor.OnSampleBuffer (float[] sampleBuffer, int sampleRate, int channelCount, long timestamp) {
            (stream as IAudioProcessor).OnSampleBuffer(sampleBuffer, sampleRate, channelCount, timestamp);
        }

        private void OnAudioDataRead (float[] destination) {
            if (stream.Length >= destination.Length)
                stream.Read(destination);
        }

        public static implicit operator AudioClip (RealtimeClip clip) {
            return clip.clip;
        }

        public static implicit operator bool (RealtimeClip clip) {
            return clip != null;
        }
        #endregion
    }
}