Unity 5.6.4or above.Net 3.5or above
In a populer way, you can load .mp3 file by UnityEngine.WWW class.
WWW www = new WWW("MyMp3File.mp3");
yield return www;
audiosource.clip = www.GetAudioClip();However, you will get an error on both Mac or Windows operation system ...
Streaming of 'mp3' on this platform is not supported
UnityEngine.WWWAudioExtensions:GetAudioClip(WWW)
<Start>c__Iterator0:MoveNext() (at Assets/TestLoader.cs:16)
UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)
Therefore, we replace UnityEngine.WWW with NLayer that is cross-platform (Windows, Mac OS, iOS, and Android).
using System;
using NLayer;
using UnityEngine;
public static class Mp3Loader {
private static MpegFile mpegFile = null;
private static string _filePath = String.Empty;
public static AudioClip LoadMp3(string filePath) {
_filePath = filePath;
mpegFile = new MpegFile(filePath);
// assign mpegFile's info into AudioClip
AudioClip ac = AudioClip.Create(System.IO.Path.GetFileNameWithoutExtension(filePath),
(int)(mpegFile.Length / sizeof(float) / mpegFile.Channels),
mpegFile.Channels,
mpegFile.SampleRate,
true,
OnMp3Read,
OnClipPositionSet);
return ac;
}
// PCMReaderCallback will called each time AudioClip reads data.
private static void OnMp3Read(float[] data) {
int actualReadCount = mpegFile.ReadSamples(data, 0, data.Length);
}
// PCMSetPositionCallback will called when first loading this audioclip
private static void OnClipPositionSet(int position) {
mpegFile = new MpegFile(_filePath);
}
}We can simplify the previous code by using in-line function instead...
using NLayer;
using UnityEngine;
public static class Mp3Loader {
public static AudioClip LoadMp3(string filePath) {
string filename = System.IO.Path.GetFileNameWithoutExtension(filePath);
MpegFile mpegFile = new MpegFile(filePath);
// assign samples into AudioClip
AudioClip ac = AudioClip.Create(filename,
(int)(mpegFile.Length / sizeof(float) / mpegFile.Channels),
mpegFile.Channels,
mpegFile.SampleRate,
true,
data => { int actualReadCount = mpegFile.ReadSamples(data, 0, data.Length); },
position => { mpegFile = new MpegFile(filePath); });
return ac;
}
}