Voice-based generic UPnP Control Point

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UPnP AV Architecture - Generic Interface Design
And Java Implementation
UPnP AV Architecture Generic Interface Design And
Java Implementation
Andreas Bobek, Hendrik Bohn, Frank
Golatowski University of Rostock Faculty of
Computer Science and Electrical
Engineering Parallel and Distributed
Computing and Networks PDCN 2005 as part of
the 23rd IASTED International Multi-Conference
on Applied Informatics 15th 17th February,
2005, Innsbruck, Austria
Andreas Bobek

University of Rostock Faculty of Computer Science
and Electrical Engineering
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
Outline

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 1 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
Outline

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 1 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.1. UPnP Device Architecture

• UPnP Universal Plug and Play
• supports ad-hoc networking of devices and
  services
• only protocols are defined (UDP, TCP, SOAP, SSDP,
  GENA, HTTP)
• independent of programming language, operating
  system and transmission medium
• six phases addressing, discovery, description,
  control, eventing, and presentation
• defines three communicating components device,
  service, control point

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and Electrical Engineering
Andreas Bobek Slide 2 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.1. UPnP Device Architecture

• role server
• offers services
• may contain other devices
• root device
• characterized by properties such as model number,
  model name, vendor...
• uniquely identifiable by UUID

• interface to the device
• offers actions and URLs for controlling,
  eventing, and presentation
• manages its state in state variables

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and Electrical Engineering
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.1. UPnP Device Architecture

• role client
• searches for devices and/or services
• invokes actions (at services)
• requests state variables

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and Electrical Engineering
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.1. UPnP Device Architecture

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and Electrical Engineering
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UPnP AV Architecture - Generic Interface Design
And Java Implementation

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.2. UPnP Stack

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and Electrical Engineering
Andreas Bobek Slide 6 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.2. UPnP Stack

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 6 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.2. UPnP Stack

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 6 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.2. UPnP Stack

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 6 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.2. UPnP Stack

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and Electrical Engineering
Andreas Bobek Slide 6 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.3. UPnP AV Architecture

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and Electrical Engineering
Andreas Bobek Slide 7 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.3. UPnP AV Architecture

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and Electrical Engineering
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UPnP AV Architecture - Generic Interface Design
And Java Implementation

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow

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and Electrical Engineering
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
Media Renderer
Media Server

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and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
1. Search Request
Media Renderer
Media Server

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
2. Search Response
Media Renderer
Media Server

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
Media Renderer
Media Server

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
3. Browse()
Media Renderer
Media Server

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and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow

• 4. Result
• DIDL Lite (XML)
• preconditioned protocols
• file formats...

Control Point
Media Renderer
Media Server

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
5. GetProtocolInfo()
Media Renderer
Media Server

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
6. supported protocols, accepted formats
Media Renderer
Media Server

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
7. matching between preconditioned and supported
protocols
Control Point
Media Renderer
Media Server

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
8. PrepareForConnection()
Media Renderer
Media Server

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
9. SetURI() Play, Pause, Stop...
Media Renderer
Media Server

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 9 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
1.4. UPnP AV Data Flow
Control Point
Media Renderer
10. Data transport (out of band)
Media Server

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and Electrical Engineering
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UPnP AV Architecture - Generic Interface Design
And Java Implementation

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and Electrical Engineering
Andreas Bobek
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
2.1. AV Interface Examples

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and Electrical Engineering
Andreas Bobek Slide 10 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
2.1. AV Interface Examples

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and Electrical Engineering
Andreas Bobek Slide 11 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation

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and Electrical Engineering
Andreas Bobek
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
2.2. AV Interface Stack

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and Electrical Engineering
Andreas Bobek Slide 12 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation

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and Electrical Engineering
Andreas Bobek
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
2.3. Application Code Examples
Control Point
UPnPAVFactory factory new UPnPAVFactoryImpl() M
ediaControlPoint cp factory.getMediaControlPoint
( new MediaControlPointListenerImpl() ) cp.st
art() cp.searchForMediaRenderers() cp.searchForM
ediaServers()

University of Rostock Faculty of Computer Science
and Electrical Engineering
Andreas Bobek Slide 13 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
2.3. Application Code Examples
Control Point
public class Listener implements
MediaControlPointListener public void
takeMediaServer( ProxyMediaServer p_server,
MediaDevice p_parent_device ) //
access proxy services ProxyAVTransport avt
p_server.getProxyAVTransport()
ProxyConnectionManager cm p_server.getProxyConne
ctionManager() ProxyContentDirectory cd
p_server.getProxyContentDirectory() //
browse content directory BrowseResult
browse_result cd.browse( "0",
ContentDirectory.BROWSE_FLAG_BROWSE_METADATA,
"", 0, 0, "" ) DidlLiteModel model
new DidlLiteModel() String result
browse_result.getResult() Element el_didl
XMLUtil.stringToElement(result)

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and Electrical Engineering
Andreas Bobek Slide 14 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
2.3. Application Code Examples

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and Electrical Engineering
Andreas Bobek Slide 15 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation

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and Electrical Engineering
Andreas Bobek
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
2.4. Advantages

• Why to use an interface layer
• separate development of stack and application
• replacement of UPnP stack without modifying
  application code

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and Electrical Engineering
Andreas Bobek Slide 16 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation

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and Electrical Engineering
Andreas Bobek
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
3.1. AV within SIRENA project

• SIRENA Service Infrastructure for Real time
  Embedded Networked Applications
• part of the ITEA program
• modify current AV Architecture
• extension by integrating QoS aspects
• adapt architecture to fit small embedded devices

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and Electrical Engineering
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UPnP AV Architecture - Generic Interface Design
And Java Implementation

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and Electrical Engineering
Andreas Bobek
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
3.2. Generalisation

• analyzing service-oriented architecture (SOA)
  concepts (UPnP, Web Services, JINI, HAVi...)
• designing device protocols independently of
  specific SOAs

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and Electrical Engineering
Andreas Bobek Slide 18 of 19
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UPnP AV Architecture - Generic Interface Design
And Java Implementation
3.2. Generalisation

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and Electrical Engineering
Andreas Bobek Slide 19 of 19