This document discusses an MXM-based application for sharing protected content. It will integrate with the chillout application for content creation and use two media frameworks, VLC and GStreamer, for playback. The first alpha release is planned for the end of July. It also provides an overview of the MXM configuration file and engine architecture, and describes how to implement a basic MXM engine and use MXM APIs.

1. An MXM-based application for
sharing protected content
Angelo Difino
MXM DevDay, London, 2009-06-28

2. A 'concrete' MXM application
An MXM-based application for sharing protected
content
List of technologies
Mpeg21FileEngine MediaFrameworkEngine
DIDEngine IPMPEngine
MetadataEngine SecurityEngine
RELEngine
First α-release due to the end of July

3. MXM (c++) idea/architecture
MXM MXM MXM
app1 app2 appN
MXM Engine APIs
MXM MXM MXM
Engine1 Engine2 EngineN
MXM Engine Factories
MXM core APIs
MXM
share/use
MXM
Configuration MXM MXM
Schema uses core schemas
dataobj uses

4. MXM configuration file
<MXMConfiguration //cut// xsi:schemaLocation="urn:org:iso:mpeg:mxm:configuration:schema
mxmConfiguration.xsd">
<MXMParameters>
<entry key="app.add.resource.path">chillout_eud/target/classes</entry> (not yet used)
<ComplexParameter>
<bar:CustomMXMParam xmlns:bar="urn:bar">A complex MXM configuration parameter</
bar:CustomMXMParam>
</ComplexParameter>
</MXMParameters>
<MediaFrameworkEngine id="1">
<DynamicLibrary>
<LibraryPath>//path//to//gst_media_framework_engine.dll</LibraryPath>(.so in linux)
</DynamicLibrary>
<ClassName>GSTMXMMediaFrameworkEngine</ClassName> (not yet used)
</MediaFrameworkEngine>

5. MXM configuration file
<MediaFrameworkEngine id="0">
<DynamicLibrary>
<LibraryPath>//path//to//vlc_media_framework_engine.dll</LibraryPath>
</DynamicLibrary>
<ClassName>VLCMXMMediaFrameworkEngine</ClassName>
</MediaFrameworkEngine>
<DIDEngine id="0">
<DynamicLibrary>
<LibraryPath>//path//to//basic_did_engine.dll</LibraryPath>
</DynamicLibrary>
<ClassName>BasicMXMDIDEngine</ClassName>
<DIDProfileCompliance>urn:mpeg:maf:schema:mediastreaming</DIDProfileCompliance>
</DIDEngine>

6. From MXM schema to MXM
dataobject
didl.xsd
didl-msx.xsd
didmodel.xsd
dii.xsd
ipmpdidl.xsd
ipmpinfo.xsd
ipmpinfo-msx.xsd
ipmpmsg.xsd XSD
mpeg4ipmp.xsd
mpeg7smp.xsd
rel-m1x.xsd
rel-m2x.xsd
rel-m3x.xsd
rel-mx.xsd
rel-r.xsd
rel-sx.xsd
xenc.xsd dsig.xsd
xml.xsd

7. MXM engine
MXMEngine::MXMEngine_t enginetype
typedef enum { DIPEngine, LicenseProtocolEngine, SecurityEngine,
AudioMetadataEngine, DISEngine, MediaFrameworkEngine, VideoMetadataEngine,
MetadataEngine, DomainEngine, MPEG21FileEngine, Graphics3DEngine,
ContentProtocolEngine, EREngine, MVCOEngine, NOT_DEFINED,
ContentSearchEngine, ImageMetadataEngine, OrchestratorEngine, MXMENGINE_NUM
DIAEngine, IPMPEngine, RELEngine, } MXMEngine_t;
DIDEngine, IPMPToolProtocolEngine, RenderingEngine,
MXMEngine(const string& enginename, const MXMEngine_t& enginetype)
MXMEngine(int argn, const char *const * argv)
template < class T > class MXMEngineFactory
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8. BasicDIDEngine: a MXM skeleton engine
DEFINITION on H
class BasicDIDEngine : public DIDEngine {
public:
BasicDIDEngine(int argn, const char *const * argv);
virtual ~BasicDIDEngine();
DIParser* getDIParser();
....// other MXM DIDEngine api definition
}; IMPLEMENTATION on CPP
class Factory : BasicDIDEngine::BasicDIDEngine
public MXMEngineFactory< BasicDIDEngine > (int nparam, const char *const * vparam) :
{ }; DIDEngine("BasicDIDEngine")
{
MXM_DLL_EXPORT void * factory0( void ) ....
{ }
return new Factory();
} //other MXM DIDEngine api implementation
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9. Supported SO and dependencies
Win32 XSD CODESYNTHESIS
http://www.codesynthesis.com/
MSVisual C++ compiler
Linux APACHE LOG4Cxx
http://logging.apache.org/log4cxx/
G++ compiler
MacOSX APACHE XERCES (used by
XSD)
...
http://xerces.apache.org/xerces-c/

10. Using MXM APIs
MxM* mxm = MxM::getInstance(argc, argv)
MXMEngineContainer* metaEngineContainer =
mxm->getDefaultEngineContainer(MXMEngine::MetadataEngine);
MXMEngineContainer* didEngineContainer =
mxm->getDefaultEngineContainer(MXMEngine::DIDEngine);
MetadataEngine* _metaengine= (MetadataEngine*) metaEngineContainer->getEngine();
DIDEngine* _didengine= (DIDEngine*) didEngineContainer->getEngine();
DIParser* di_parser=_didengine->getDIParser();
di_parser->parseDI(dci_url); //can be parseDI(MXMObject*)
MXMObject* metadata=0;
di_parser->getContentMetadata(metadata);
MetadataParser* meta_parser= _metaengine->getMetadataParser();
meta_parser->parseMetadataObj(metadata);
std::string title("");
meta_parser->getTitle(title);

11. Using MXM APIs
....
LicenseParser* licence_parser->parseLicense(license);
GrantParser* first_gp;
list< GrantParser* > l;
if (licence_parser->getGrants( l )) {
list< GrantParser* >::const_iterator it = l.begin();
while(it != l.end()) {
first_gp=*it;
if (first_gp->containsProtectedResource()) {
ProtectedResourceParser* protectedresource;
first_gp->getProtectedResource(protectedresource);
MXMObject* master_encrypted=0;
protectedresource->getEncryptedKey(master_encrypted);
....
_mfengine->setIPMPTool(drmtools);
_mfengine->open(resource_url);
_mfengine->play();
....
_mfengine->pause();
....
_mfengine->stop();

12. MXM engine todo
MXM engine parameters
MXM exception
MXM core as singleton
MXM configuration file updated live
MXM loader / adapter (like java side)
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13. A test MXM application
An MXM-based application for access protected content
Integrated with chillout functionalities (for creation)
Two media frameworks (MF APIs)
VLC (0.9.9.a) and GSTREAMER (0.10 → 1½ year old!!!)
On win32
GTK++ (with glib)
GSTREAMER and VLC (easy to install)
OPENSSL (for some protection/security aspect)
SQLite

14. MXM info
MXM Mailing list
mxm@lists.uni-klu.ac.at
Website
http://mxm.wg11.sc29.org/
(my)Personal contacts
angelo@smartrm.com
skype: angelo.difino

15. Thank you for your attention!
angelo@smartrm.com
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