Rygel
        
        Description:
        Content:
        Interfaces:
        
          - SearchableContainer - The base class for 
              searchable containers.
- TrackableContainer - The base class for 
              containers that provide automatic change tracking.
- TrackableItem - 
- VisualItem - An interface that visual (video and 
              image) items must implement.
- WritableContainer - This interface should 
              be implemented by 'writable' containers - ones that allow adding (via upload), removal and editing of items directly under them. 
              Currently, only addition and removal are supported.
- DataSource - Interface for all data streams 
              provided by a #RygelMediaEngine.
- UpdatableObject - This interface should be 
              implemented by 'updatable' objects - ones that allow modifying their own metadata in some persistent storage.
Classes:
        
          - AudioItem - Represents an audio item.
- DLNAProfile - Data class representing a DLNA profile.
              It contains the name and the corresponding DLNA mime type.
- ImageItem - Represents an image item.
- LogicalExpression - This is a parsed UPnP 
              search expression consisting of two other search expressions joined by a boolean operator such as AND or OR.
- MediaArtStore - This maps RygelMusicItem objects to
              their cached cover art, implementing the GNOME MediaArt storage specification 
              and the simplified version that Banshee uses.
- MediaObjects - An array list that keeps media 
              objects.
- MusicItem - Represents a music item.
- PhotoItem - Represents a photo item.
- RelationalExpression - This is a parsed UPnP
              search expression consisting of two strings joined by a relational operator such as such <, <=, ==, !=, >, >=, derivedFrom 
              or exists.
- SimpleContainer - A simple implementation of 
              RygelMediaContainer that keeps all RygelMediaObjects in memory. You should add children via rygel_simple_container_add_child_item().
            
- Subtitle - Represents a subtitle for a video.
          
- Thumbnail - Represents a picture or video thumbnail.
            
- VideoItem - Represents a video item.
- MediaContainer - This is a container 
              (folder) for media items and child containers.
- MediaItem - Represents a media item (Music, 
              Video or Image).
- MediaObject - Represents a media object 
              (container or item).
- MediaServerPlugin - This is the base 
              class for every Rygel implementation of a UPnP media server. It should be used either for a real plug-in for the Rygel process or used 
              in-process via the librygel-server API.
- SearchExpression - Represents a 
              SearchExpression tree.
- TranscodeManager - Responsible for 
              management of all transcoders: # Gets the appropriate transcoder given a transcoding target. # Provide all possible transcoding 
              resources for items.
- Transcoder - The base Transcoder class. Each 
              implementation derives from it and must implement create_source() and get_distance().
- MediaServer - This class may be used to implement in-
              process UPnP-AV media servers.
- MediaEngine - This is the base class for 
              media engines that contain knowledge about the streaming and (optionally) the transcoding and seeking capabilites of the media library 
              in use. Derived classes also instantiate any transcoding objects supported by the media engine and specify the list of media formats the
              engine is capable of playing.
- HTTPSeek - HTTPSeek is an abstract 
              representation of a ranged HTTP request.
- PlaylistItem - Represents a playlist item.
          
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