Wireless Jukebox

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Wireless Jukebox

• Vanessa Clark
• Franklin Williams
• October 31, 2002

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Todays Topics

• Introduction to the Wireless Jukebox
• Phases of Implementation
• 1. Hardware Development
• 2. Client GUI Implementation
• 3. Server GUI Implementation
• 4. Testing
• Possible Design Challenges

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Introduction

• Motivation Provide simple PC-free interface to
  the digital music libraries of all nearby
  computers.
• Example
• Benefits
• Easier access to higher quality sound systems
• CD-less playback (no more burning)
• Playlist can consist of files from multiple
  computers

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Phase I Hardware

• Components
• All-in-one embedded system (with PC/104
  architecture)
• LCD display (from EarthLCD)
• Trackball for user interaction (available from
  Pricewatch)
• Sound card (embedded in system)
• Wireless access card (available from Pricewatch)
• Requirements
• Low cost
• Pentium 166 MHz with 32 megs of ram
• 802.11 Wireless Access Card
• Estimated Date of Completion 11/26/02

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Phase II Client

• Implementation
• Locate servers
• Maintain a list of available audio
• Play streamed audio
• GUI
• Utilized Classes and Packages
• Sockets and MulticastSockets
• ArrayList and custom MusicListItem class
• Java Media Framework
• Javax.swing
• Estimated Date of Completion 11/12/02

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Phase III Server

• Implementation
• Connect to client
• Search all available drives for playable audio
  media and send list of media to client
• Stream audio
• GUI
• Utilized Classes and Packages
• Sockets and DatagramSockets
• File, ArrayList, and custom MusicListItem class
• Java Media Framework
• Javax.swing
• Estimated Date of Completion 11/19/02

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Phase IV Testing

• Test cases
• Basic cases (Sound plays, application loads, list
  is maintained)
• One/multiple client(s) and one/multiple server(s)
• One server crashes (or leaves network)
• Media is disguised as playable format (i.e. text
  file renamed to .mp3 extension)
• Server contents on disk change
• Multiple drives on a computer

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Challenges for Discussion

• Initial communication with unknown servers
• Streaming MP3 files
• Loss of signal during streaming
• Maintaining up-to-date information

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Wireless Jukebox

• Vanessa Clark
• Franklin Williams
• October 31, 2002