[Device] Add X_DLNA_PS transport action support

[cguiraud]

• Add the X_DLNA_PS transport action support to allow the playspeeds provided by the renderer once we have provided it a URI (SetAVTransportURI()) in addition to the renderer default playspeeds retrieved via the introspection. MINIMUM_RATE, MAXIMUM_RATE and TRANSPORT_PLAY_SPEEDS properties will be upddated.

when SetAVTransportURI() action is called, MINIMUM_RATE, MAXIMUM_RATE and TRANSPORT_PLAY_SPEEDS properties will be reset with the renderer default playspeeds.

• The renderer default playspeeds are stored in the dlr_devicet structure to be re-used without having to be re-computed.
• When the application set the property RATE, the new rate value is checked with either the renderer default allowed playspeeds or the X_DLNA_PS allowed playspeeds depending on the availability of the X_DLNA_PS.
• We now emit a property changed signal when application set the DLR_INTERFACE_PROP_MINIMUM_RATE property with a value not equal to the current one.
• For the parsing of the action string containing the X_DLNAPS content, thanks to regexp API, the sequence "\," are replaced by "" ("\," is used to separated the X_DLNA_PS speeds), then the action string is splitted by "," to separate each actions token. For getting the X_DLNAPS playspeeds we then just have to split the string with ""

action string = Play,Stop,Seek,X_DLNA_PS=-8\,2\,4\,8

Signed-off-by: Christophe Guiraud christophe.guiraud@intel.com

[markdryan]

Christophe, do you have a DMR that actually sets X_DLNA_PS? Unless, WMP does this I won't be able to test properly here.