How to load/play an audio file?

dubstep · February 14, 2012, 5:02am

HI Folks,

I’ve been trying to decipher the Java-to-Jruby for playing a sound file.
Yes, I’ve read CallingJavaFromJRuby · jruby/jruby Wiki · GitHub
I’m also looking at
http://www3.ntu.edu.sg/home/ehchua/programming/java/J8c_PlayingSound.html

Could one of you “in the know” show me how to use SourceDataLine/Clip
or
JMF to load and play a sound file?

Thanks!
Peter F.
(847) 859-9550
Email: [email protected]
IM GTalk: peter.fitzgibbons
IM AOL: [email protected]

churp · February 14, 2012, 4:06pm

Here’s an example from Peter C.'s JRuby port of Markus Persson’s
“Prelude of the Chambered”:

github.com

peterc/potc-jruby/blob/master/escape/sound.rb

java_import javax.sound.sampled.AudioSystem
java_import javax.sound.sampled.Clip
java_import javax.sound.sampled.DataLine

class Sound
  attr_accessor :clip
  
  def self.load_sound(file_name)
    sound = new
    
    url = java.net.URL.new("file://" + ASSETS_DIR + file_name) # nasty little hack due to borked get_resource (means applet won't be easy..)
    ais = AudioSystem.get_audio_input_stream(url)
    info = DataLine::Info.new(Clip.java_class, ais.format)
    clip = AudioSystem.get_line(info)
    clip.open(ais)
    clip.extend JRuby::Synchronized
    sound.clip = clip
    
    sound
  end

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Does that help? Maybe it’s worth a wiki page somewhere…

Charlie

On Tue, Feb 14, 2012 at 4:01 AM, Peter F.

churp · February 17, 2012, 7:40pm

https://github.com/rdp/jruby-swing-helpers/blob/master/play_audio.rb

Is how I do it.