CODEWITHSUNDEEP
javasynchronizationvisualizationjlayer
Matt
Matt

Reputation: 53

Synchronizing Java Visualizer Audio and Visual

I've run into a problem creating a visualizer for .mp3 files in Java. My goal is to create a visualization that runs in time with the .mp3 file being played.

I can currently visualize an .mp3 OR play it, but not both at the same time. I am using libraries which may make this trickier than necessary.

I currently:

  1. Read in the .mp3 as a FileInputStream.
  2. a) Convert the FileInputStream into a Bitstream and run the Visualizer OR b) Pass the FileInputStream to a library Play method where it converts it into a Bitstream, decodes it, and plays it.

I am using the JLayer library to play and decode the .mp3.

My question is: how do I synchronize the two actions so that I can run both at the same time AND they line up (so my visualizations correspond to the changing frequencies). This implies that they finish at the same time as well.

Upvotes: 1

Views: 902

Answers (2)

Jan Cajthaml
Jan Cajthaml

Reputation: 403

I am currently working on the same thing and I found the solution.

The problem: synchronized methods and attributes that doesn't allow paraell access.

The solution: Two threads in one thread group and synchronization over that thread group.

or* : Cached thread pool for runnables and synchronization over that cached pool. then your stream reader is one runnable and your visualisation is the second runnable.

Works just fine.

Upvotes: 0

Pat
Pat

Reputation: 1

I would try and set up each part in a thread and then synchronize the timing elements so they start at the same time.

Upvotes: 0

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