DLNA bundles - OSGi as a Media Gateway

OSGi Devcon 2011

DLNA Bundles – OSGi as a Media Gateway

Shinya Nobuoka
Hitachi Solutions
Mar 24, 2011

© Hitachi Solutions, Ltd. 2011. All rights reserved.

Outline
• Motivation
• What is DLNA? Why?
• DLNA bundles
• Applications
• Summary

© Hitachi Solutions, Ltd. 2011. All rights reserved. 1

Who we are

Shinya Nobuoka
OSGi bundle developer at Hitachi Solutions

Hitachi Solutions
- System Integrator/Developer
- Location: Tokyo, Japan
- Providing OSGi-certified product
“SuperJ Engine Framework”


Outline
• Motivation

• DLNA bundles

• Applications

• Summary


Motivation
What is the killer application/service on OSGi?
We focused on Media services
Idea & Objective:
Develop DLNA bundles those enable media
services through the internet

Video Site
Video Picture Sharing
DLNA
DLNA bundles Friend’s Home
Picture
OSGi
DLNA
Device Home Gateway

Outline
• Motivation

• DLNA bundles

• Applications

• Summary


What is DLNA?
DLNA
 Standard for sharing media contents among
home devices on the LAN
(1) play

Video
Server (DMS)
Player (DMP/DMR)
(2) control

Controller
(DMC)

(Case 1) Watch a video in recorder from TV
(Case 2) Use cell phone as a remote controller

Why DLNA?
DLNA is a widely accepted standard on
home network area
There are a lot of home devices those
support DLNA
 9000 DLNA-certified products
 440 million DLNA-certified devices

TV PC
Smart Phone
Game Devices
HDD Recorder

Outline
• Motivation


• DLNA bundles
• Applications

• Summary


DLNA Bundles Overview
Make HGW Get media files from Control DLNA
to be a DMS the internet, open it for devices from
home net. browser
Contents Video Site
control
DLNA

USB DMS DMS Proxy HTML DMC

DMS Core DMC Core
UPnP
OSGi
[Issue 1] How to implement DLNA stack
[Issue 2] Getting internet contents into DLNA

How to implement DLNA stack 1/3

DLNA is based on UPnP (Universal Plug and Play)
DLNA Media contents sharing
Automatic device among electric devices
discovery on the (e.g. TV, recorder,..)
same network UPnP

UPnP is standardized as a OSGi service.
Basic idea is to implement DLNA service on the
UPnP service
DLNA App
DLNA (stack)
UPnP (stack) But..

Problem
UPnP service does not provide functions needed to
implement DLNA service
Example Case
DLNA app needs <dlna:> tag info inserted into UPnP message
UPnP service has no means to include <dlna:> tag info
into UPnP message
Need to extend UPnP service
Original interface of UPnP should not be changed
(else it causes compatibility problem)
<?xml…>
<device> DLNA App
…
<dlna:X_DLNADOC…> DLNA
DMS-1.50
DLNA </dlna:X_DLNADOC> UPnP
device

Our Solution
Add “hidden interface” to UPnP by using
Dictionary argument
Example Case (cont.)
UPnP service adds <dlna:> tag info into UPnP message only
if <dlna:> tag info was present in the Dictionary argument
from DLNA App
Dictionary (Map)
DLNA App
object
Device info
<?xml…> UPnP.device.type: urn:schemas…
<device>
… UPnP.device.manufacturer: Hitachi
<dlna:X_DLNADOC…> …
DMS-1.50 DLNA.x_dlnadoc: DMS-1.50
</dlna:X_DLNADOC> DLNA
DLNA UPnP
device

Getting internet contents into DLNA 1/4
Idea: DMS Proxy
DMS (DLNA server) which get contents from the
internet and show them as DLNA contents

1. Convert contents list to DLNA format/protocol
2. Transcode videos (flv, mp4) to DLNA format (mpeg2)
・ ------- ・ -------
・ ------- ・ -------
・ ------- ・ -------
・ ------- ・ -------
DLNA
contents list contents list
Video Site X

DLNA DMS Proxy
DLNA Picture Site Y
contents file contents file
device
DLNA
protocol UPnP


Implementation issues of DMS Proxy on HGW

1. Lack of CPU power for video transcoding

Solution: Transcoding Server

2. Implementation cost of DLNA applications

Solution: DMS Core



Transcoding Server
 Enables real-time transcoding using server’s
CPU resource
 Can be worked on PlugComputer, PC, etc..

Video Site X
DMS Proxy FLV
MPEG2 MPEG2
DLNA
device
UPnP
Transcoding
Server



DMS Core
 Provides core functions for implementing DMS
 Simplifies DMS application development
• Get contents list
• Get contents file Picture Site X
・
・
-------
-------
Picture Site Y
・ -------
・ -------

Video Site Y Video Site X

・ -------
・ ------- Simple API
・ -------
・ -------
DLNA MPEG2
DMS Core • Generate DLNA
DLNA contents list
device UPnP • conceal the detail of
DLNA protocol

Outline
• Motivation


• DLNA bundles

• Applications
• Summary


DMS Proxy for a video site
Use smart phone as a controller

Select a video,
push it to DLNA device
Smart Phone
(1)

(2) Video Site A
Video Site X
(4) (DMS Proxy)
DLNA
DMC Core DMS Core (3)
device
OSGi

Transcoding
Server

Picture sharing between homes

Send pictures to friend’s home

(1) Take picture, (３) Send
upload to HGW Pic Reciever
(2) Send
DMS/DMC Core DLNA

OSGi DLNA
Picture Frame
Eye-Fi
card

Friend’s Home
My Home (e.g. Parents)

Outline
• Motivation


• DLNA bundles

• Applications

• Summary

Summary
Developed DLNA bundles those can be
used for internet-based media service
 DLNA stack can be implemented by
extending UPnP service
 Server side transcoding is needed for real time
streaming of video files
 It is possible to bring internet contents into
local DLNA network
There are many possible media services
waiting to be implemented with DLNA
bundles

Thank you!

http://www.hitachi-solutions.com/

Shinya Nobuoka
shinya.nobuoka.vs@hitachi-solutions.com
DLNA is a registered trademark and DLNA Certified is a trademark of the Digital Living Network Alliance.
Eye-Fi is a registered trademark of Eye-Fi, inc.
UPnP is a trademark of the UPnP Implementers Corporation.
All other trademarks or registered trademarks are the property of their respective owners. © Hitachi Solutions, Ltd. 2011. All rights reserved. 22

DLNA bundles - OSGi as a Media Gateway

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