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

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

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

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>

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>

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

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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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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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/

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);

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();

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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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

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

Thank you for your attention!
angelo@smartrm.com
protect and share your secrets @ ease