Perform Bluetooth A2DP sink functions - Qualcomm Dragonwing Documentation

Prerequisites

Before you begin, set up your device and go to the required menu as described in Set up the device for A2DP functions.

Connect a remote device

To connect a remote device, run the following command from the bluetoothctl menu:

connect <bt_address>

Parameters <bt_address> is the Bluetooth address of the remote device. Example To connect to a paired remote device with <bt_address> D4:8A:39:78:27:41, run the following command:

connect D4:8A:39:78:27:41

Sample output

[bluetooth]# connect D4:8A:39:78:27:41
Attempting to connect to D4:8A:39:78:27:41
[CHG] Device D4:8A:39:78:27:41 Connected: yes
[NEW] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1
[NEW] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep2
[NEW] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep3
[NEW] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep4
[NEW] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep5
[NEW] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2
Connection successful
[NEW] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 [default]
[CHG] Device D4:8A:39:78:27:41 ServicesResolved: yes
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Repeat: off
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Shuffle: off
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Status: stopped
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Title: Not Provided
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 TrackNumber: 0x00000001 (1)
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 NumberOfTracks: 0x00000001 (1)
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Duration: 0x00000000 (0)
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Album:
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Artist:
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Genre:
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x00000000 (0)
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x00000000 (0)
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 Volume: 0x004d (77)
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 State: pending
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 State: active
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Status: playing
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x00000000 (0)
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 State: idle
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x00000000 (0)
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Status: stopped
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x00000000 (0)
[MyDeviceB]#

List available transport

To list the available transport, run the following command from the menu transport submenu:

list

Sample output

[MyDeviceB]# list
Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2

Get information about codec capabilities

To get information about the codec capabilities of a transport, run the following command from the menu transport submenu:

show <transport>

Parameters <transport> is the transport path. Example To get information about the codec capabilities of <transport> /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2, run the following command:

show /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2

Sample output

[MyDeviceB]# show /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2
Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2
   UUID: 0000110b-0000-1000-8000-00805f9b34fb
   Codec: 0x00 (0)
   Configuration: 0x21 (33)
   Configuration: 0x15 (21)
   Configuration: 0x02 (2)
   Configuration: 0x35 (53)
   Device: /org/bluez/hci0/dev_D4_8A_39_78_27_41
   State: active
   Volume: 0x007f (127)

Set absolute volume

Ensure that the DUT and the remote device support the setabsvolume feature.

To set the absolute volume of a transport, run the following command from the menu transport submenu:

volume <transport> [value]

Parameters

<transport> is the transport path.
[value] is the volume level.

Example To set the absolute volume of <transport> /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 as 0, run the following command:

volume /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 0

Sample output

<me /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 0
Changing Volume succeeded
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 Volume: 0x0000 (0)
<me /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 100
Changing Volume succeeded
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 Volume: 0x0064 (100)
< /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 50
Changing Volume succeeded

Play an audio file

To play an audio file, run the following command from the menu player submenu:

play [item]

Sample output

[MyDeviceB]# play
Attempting to play
Play successful
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 State: pending
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 State: active
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x000cc8b9 (837817)
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Status: playing
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x000cc932 (837938)
[MyDeviceB]#

Pause playback

To pause playback, run the following command from the menu player submenu:

pause

Sample output

[MyDeviceB]# pause
Attempting to pause
Pause successful
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x000cc888 (837768)
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Status: paused
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x000cc888 (837768)
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 State: idle
[MyDeviceB]#

Stop playback

To stop playback, run the following command from the menu player submenu:

stop

Sample output

[MyDeviceB]# stop
Attempting to stop
Stop successful
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x00000000 (0)
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Status: stopped
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x00000000 (0)
[CHG] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd2 State: idle

Play the next audio file

To play the next audio file, run the following command from the menu player submenu:

next

Sample output

[MyDeviceB]# next
Attempting to jump to next
Next successful

Play the previous audio file

To play the previous audio file, run the following command from the menu player submenu:

previous

Sample output

[MyDeviceB]# previous
Attempting to jump to previous
Previous successful

Fast forward playback

To fast forward playback, run the following command from the menu player submenu:

fast-forward

Sample output

[MyDeviceB]# fast-forward
Fast forward playback
FastForward successful
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Status: forward-seek
[CHG] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 Position: 0x00000000 (0)

Disconnect a remote device

To disconnect a remote device, run the following command from the bluetoothctl menu:

disconnect <bt_address>

Parameters <bt_address> is the Bluetooth address of the remote device. Example To disconnect a paired remote device with <bt_address> D4:8A:39:78:27:41, run the following command:

disconnect D4:8A:39:78:27:41

Sample output

[MyDeviceB]# disconnect D4:8A:39:78:27:41
Attempting to disconnect from D4:8A:39:78:27:41
[DEL] Player /org/bluez/hci0/dev_D4_8A_39_78_27_41/player0 [default]
[DEL] Transport /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1/fd1
[DEL] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep1
[DEL] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep2
[DEL] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep3
[DEL] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep4
[DEL] Endpoint /org/bluez/hci0/dev_D4_8A_39_78_27_41/sep5
[CHG] Device D4:8A:39:78:27:41 ServicesResolved: no
Successful disconnected
[CHG] Device D4:8A:39:78:27:41 Connected: no

Other player functions

The menu player submenu offers other functions that enable you to:

Shuffle tracks
Rewind an audio file
Repeat a single track, all tracks, or a playlist
Switch the equalizer on or off
Search a track

​Prerequisites

​Connect a remote device

​List available transport

​Get information about codec capabilities

​Set absolute volume

​Play an audio file

​Pause playback

​Stop playback

​Play the next audio file

​Play the previous audio file

​Fast forward playback

​Disconnect a remote device

​Other player functions

Prerequisites

Connect a remote device

List available transport

Get information about codec capabilities

Set absolute volume

Play an audio file

Pause playback

Stop playback

Play the next audio file

Play the previous audio file

Fast forward playback

Disconnect a remote device

Other player functions