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BlueZ D-Bus Media API description
*********************************
Media hierarchy
===============
Service org.bluez
Interface org.bluez.Media1
Object path [variable prefix]/{hci0,hci1,...}
Methods void RegisterEndpoint(object endpoint, dict properties)
Register a local end point to sender, the sender can
register as many end points as it likes.
Note: If the sender disconnects the end points are
automatically unregistered.
possible properties:
string UUID:
UUID of the profile which the endpoint
is for.
byte Codec:
Assigned number of codec that the
endpoint implements. The values should
match the profile specification which
is indicated by the UUID.
array{byte} Capabilities:
Capabilities blob, it is used as it is
so the size and byte order must match.
Possible Errors: org.bluez.Error.InvalidArguments
org.bluez.Error.NotSupported - emitted
when interface for the end-point is
disabled.
void UnregisterEndpoint(object endpoint)
Unregister sender end point.
void RegisterPlayer(object player, dict properties)
Register a media player object to sender, the sender
can register as many objects as it likes.
Object must implement at least
org.mpris.MediaPlayer2.Player as defined in MPRIS 2.2
spec:
http://specifications.freedesktop.org/mpris-spec/latest/
Note: If the sender disconnects its objects are
automatically unregistered.
Possible Errors: org.bluez.Error.InvalidArguments
org.bluez.Error.NotSupported
void UnregisterPlayer(object player)
Unregister sender media player.
Media Control hierarchy
=======================
Service org.bluez
Interface org.bluez.MediaControl1 [Deprecated]
Object path [variable prefix]/{hci0,hci1,...}/dev_XX_XX_XX_XX_XX_XX
Methods void Play()
Resume playback.
void Pause()
Pause playback.
void Stop()
Stop playback.
void Next()
Next item.
void Previous()
Previous item.
void VolumeUp()
Adjust remote volume one step up
void VolumeDown()
Adjust remote volume one step down
void FastForward()
Fast forward playback, this action is only stopped
when another method in this interface is called.
void Rewind()
Rewind playback, this action is only stopped
when another method in this interface is called.
Properties
boolean Connected [readonly]
MediaPlayer1 hierarchy
======================
Service org.bluez (Controller role)
Interface org.bluez.MediaPlayer1 [Experimental]
Object path [variable prefix]/{hci0,hci1,...}/dev_XX_XX_XX_XX_XX_XX/playerX
Methods void Play()
Resume playback.
void Pause()
Pause playback.
void Stop()
Stop playback.
void Next()
Next item.
void Previous()
Previous item.
void FastForward()
Fast forward playback, this action is only stopped
when another method in this interface is called.
void Rewind()
Rewind playback, this action is only stopped
when another method in this interface is called.
Properties string Equalizer [readwrite]
Possible values: "off" or "on"
string Repeat [readwrite]
Possible values: "off", "singletrack", "alltracks" or
"group"
string Shuffle [readwrite]
Possible values: "off", "alltracks" or "group"
string Scan [readwrite]
Possible values: "off", "alltracks" or "group"
string Status [readonly]
Possible status: "playing", "stopped", "paused",
"forward-seek", "reverse-seek"
or "error"
uint32 Position [readonly]
Playback position in milliseconds. Changing the
position may generate additional events that will be
sent to the remote device. When position is 0 it means
the track is starting and when it's greater than or
equal to track's duration the track has ended. Note
that even if duration is not available in metadata it's
possible to signal its end by setting position to the
maximum uint32 value.
dict Track [readonly]
Track metadata.
Possible values:
string Title:
Track title name
string Artist:
Track artist name
string Album:
Track album name
string Genre:
Track genre name
uint32 NumberOfTracks:
Number of tracks in total
uint32 TrackNumber:
Track number
uint32 Duration:
Track duration in milliseconds
object Device [readonly]
Device object path.
string Name [readonly]
Player name
string Type [readonly]
Player type
Possible values:
"Audio"
"Video"
"Audio Broadcasting"
"Video Broadcasting"
string Subtype [readonly]
Player subtype
Possible values:
"Audio Book"
"Podcast"
boolean Browsable [readonly]
If present indicates the player can be browsed using
MediaFolder interface.
Possible values:
True: Supported and active
False: Supported but inactive
Note: If supported but inactive clients can enable it
by using MediaFolder interface but it might interfere
in the playback of other players.
boolean Searchable [readonly]
If present indicates the player can be searched using
MediaFolder interface.
Possible values:
True: Supported and active
False: Supported but inactive
Note: If supported but inactive clients can enable it
by using MediaFolder interface but it might interfere
in the playback of other players.
object Playlist
Playlist object path.
MediaFolder1 hierarchy
======================
Service unique name (Target role)
org.bluez (Controller role)
Interface org.bluez.MediaFolder1 [Experimental]
Object path freely definable (Target role)
[variable prefix]/{hci0,hci1,...}/dev_XX_XX_XX_XX_XX_XX/playerX
(Controller role)
Methods object Search(string value, dict filter)
Return a folder object containing the search result.
To list the items found use the folder object returned
and pass to ChangeFolder.
array{objects, properties} ListItems(dict filter)
Return a list of items found
void ChangeFolder(object folder)
Change current folder.
Note: By changing folder the items of previous folder
might be destroyed and have to be listed again, the
exception is NowPlaying folder which should be always
present while the player is active.
Properties uint32 NumberOfItems [readonly]
Number of items in the folder
string Name [readonly]
Folder name:
Possible values:
"/Filesystem/...": Filesystem scope
"/NowPlaying/...": NowPlaying scope
Note: /NowPlaying folder might not be listed if player
is stopped, folders created by Search are virtual so
once another Search is perform or the folder is
changed using ChangeFolder it will no longer be listed.
Filters uint32 Start:
Offset of the first item.
Default value: 0
uint32 End:
Offset of the last item.
Default value: NumbeOfItems
array{string} Attributes
Item properties that should be included in the list.
Possible Values:
"title", "artist", "album", "genre",
"number-of-tracks", "number", "duration"
Default Value: All
MediaItem1 hierarchy
====================
Service unique name (Target role)
org.bluez (Controller role)
Interface org.bluez.MediaItem1 [Experimental]
Object path freely definable (Target role)
[variable
prefix]/{hci0,hci1,...}/dev_XX_XX_XX_XX_XX_XX/playerX/itemX
(Controller role)
Methods void Play()
Play item
void AddtoNowPlaying()
Add item to now playing list
Properties object Player [readonly]
Player object path the item belongs to
string Name [readonly]
Item displayable name
string Type [readonly]
Item type
Possible values: "video", "audio", "folder"
string FolderType [readonly, optional]
Folder type.
Possible values: "mixed", "titles", "albums", "artists"
Available if property Type is "Folder"
boolean Playable [readonly, optional]
Indicates if the item can be played
Available if property Type is "folder"
dict Metadata [readonly]
Item metadata.
Possible values:
string Title
Item title name
Available if property Type is "audio"
or "video"
string Artist
Item artist name
Available if property Type is "audio"
or "video"
string Album
Item album name
Available if property Type is "audio"
or "video"
string Genre
Item genre name
Available if property Type is "audio"
or "video"
uint32 NumberOfTracks
Item album number of tracks in total
Available if property Type is "audio"
or "video"
uint32 Number
Item album number
Available if property Type is "audio"
or "video"
uint32 Duration
Item duration in milliseconds
Available if property Type is "audio"
or "video"
MediaEndpoint1 hierarchy
========================
Service unique name
Interface org.bluez.MediaEndpoint1
Object path freely definable
Methods void SetConfiguration(object transport, dict properties)
Set configuration for the transport.
array{byte} SelectConfiguration(array{byte} capabilities)
Select preferable configuration from the supported
capabilities.
Returns a configuration which can be used to setup
a transport.
Note: There is no need to cache the selected
configuration since on success the configuration is
send back as parameter of SetConfiguration.
void ClearConfiguration(object transport)
Clear transport configuration.
void Release()
This method gets called when the service daemon
unregisters the endpoint. An endpoint can use it to do
cleanup tasks. There is no need to unregister the
endpoint, because when this method gets called it has
already been unregistered.
MediaTransport1 hierarchy
=========================
Service org.bluez
Interface org.bluez.MediaTransport1
Object path [variable prefix]/{hci0,hci1,...}/dev_XX_XX_XX_XX_XX_XX/fdX
Methods fd, uint16, uint16 Acquire()
Acquire transport file descriptor and the MTU for read
and write respectively.
Possible Errors: org.bluez.Error.NotAuthorized
org.bluez.Error.Failed
fd, uint16, uint16 TryAcquire()
Acquire transport file descriptor only if the transport
is in "pending" state at the time the message is
received by BlueZ. Otherwise no request will be sent
to the remote device and the function will just fail
with org.bluez.Error.NotAvailable.
Possible Errors: org.bluez.Error.NotAuthorized
org.bluez.Error.Failed
org.bluez.Error.NotAvailable
void Release()
Releases file descriptor.
Properties object Device [readonly]
Device object which the transport is connected to.
string UUID [readonly]
UUID of the profile which the transport is for.
byte Codec [readonly]
Assigned number of codec that the transport support.
The values should match the profile specification which
is indicated by the UUID.
array{byte} Configuration [readonly]
Configuration blob, it is used as it is so the size and
byte order must match.
string State [readonly]
Indicates the state of the transport. Possible
values are:
"idle": not streaming
"pending": streaming but not acquired
"active": streaming and acquired
uint16 Delay [readwrite]
Optional. Transport delay in 1/10 of millisecond, this
property is only writeable when the transport was
acquired by the sender.
boolean NREC [readwrite]
Optional and HFP specific (external to BlueZ).
Indicates if echo cancelling and noise reduction
functions are active in the transport, this
property is only writeable when the transport
was acquired by the sender.
boolean InbandRingtone [readwrite]
Optional and HFP specific (external to BlueZ).
Indicates if the transport support sending
ringtones, this property is only writeable when
the transport was acquired by the sender.
string Routing [readonly]
Optional and HFP specific (external to BlueZ).
Indicates where is the transport being routed.
Possible Values: "HCI" or "PCM"
uint16 Volume [readwrite]
Optional. Indicates volume level of the transport,
this property is only writeable when the transport was
acquired by the sender.
Note: the property will not be present for HSP/HFP
transports and MicrophoneGain/SpeakerGain should be
used instead.
Possible Values: 0-127
byte MicrophoneGain [readwrite]
Optional. Indicates volume level of the transport's
incoming audio stream for HSP/HFP transports. This
property is only writeable when the transport was
acquired by the sender.
Possible Values: 0-15
byte SpeakerGain [readwrite]
Optional. Indicates volume level of the transport's
outgoing audio stream for HSP/HFP transports. This
property is only writeable when the transport was
acquired by the sender.
Possible Values: 0-15
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