Realtime MP3 Decoding in Actionscript 3

So did you ever try to play Shoutcast streams in Flash? Did you run into memory leaks? Did the playback sound pitched or otherwise screwed? Fear no more. Let me introduce you to as3icy.

as3icy is a drop-in replacement for the Flash Player’s Sound object that can reliably play Shoutcast, Icecast and Limewire MP3 streams. And it extracts metadata info from the stream in real time. It also reliably plays VBR MP3.

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Posted in AS3


Open Flash CS4, create new AS3 FLA, add as3swf.swc and paste this on frame 1:

import com.codeazur.as3swf.SWF;
var swf:SWF = new SWF(root.loaderInfo.bytes);

Trace output:

    Version: 10
    FileLength: 149405
    FileLengthCompressed: 149405
    FrameSize: (550,400)
    FrameRate: 24
    FrameCount: 1
    [69:FileAttributes] AS3: true, HasMetadata: false, 
      UseDirectBlit: false, UseGPU: false, UseNetwork: false
    [09:SetBackgroundColor] Color: #FFFFFF
        [0] Frame: 0, Name: Scene 1
    [82:DoABC] Lazy: true, Length: 149219
        [0] TagID: 0, Name: Untitled_fla.MainTimeline

Excercise: Draw something on stage, and run the code again.

Want more? Drop by my session Hacking SWF at FITC Amsterdam (Feb 22th, 16:00).

[Edit] Jim Cheng deserves credits. He was the one who whispered “root.loaderInfo.bytes” into my virtual ear on IM.