AVRCP Commands: next and previous failed in a2dp_source_demo

[lnjin]

Describe the bug AVRCP commands next and previous failed in a2dp_source_demo

To Reproduce Steps to reproduce the behavior:

1. Run example 'a2dp_source_demo' on one linux server
2. Connect from remote device(linux system) with bluetoothctl app
3. After connect successfully, start bluetooth-player on remote device
4. Enter next and previous command in bluetooth-player

Expected behavior next and previous commands should be supported

HCI Packet Logs hci_dump.zip

Environment

• Current BTstack branch: [develop]
• Bluetooth Controller [biaze D27]
• Remote device: embedded device running Linux 5.4.70

Additional context demo side log: root@lina-OptiPlex-790:/home/lina/Git/btstack/port/libusb# ./a2dp_source_demo Packet Log: /tmp/hci_dump.pklg USB Path: 01-08 Local version information:

• HCI Version 0x0006
• HCI Revision 0x22bb
• LMP Version 0x0006
• LMP Subversion 0x22bb
• Manufacturer 0x000a BTstack up and running on 00:1A:7D:DA:71:11. A2DP Source: Connected to address 20:4E:F6:BB:06:C6, a2dp cid 0x01, local seid 0x01. A2DP Source: Received SBC codec configuration, sampling frequency 44100, a2dp_cid 0x01, local seid 0x01, remote seid 0x02. Received media codec configuration:
  • num_channels: 2
  • sampling_frequency: 44100
  • channel_mode: 2
  • block_length: 16
  • subbands: 8
  • allocation_method: 0
  • bitpool_value [2, 53] A2DP Source: Stream established a2dp_cid 0x01, local_seid 0x01, remote_seid 0x02 A2DP Source: Stream started, a2dp_cid 0x01, local_seid 0x01 AVRCP: Channel successfully opened: media_tracker.avrcp_cid 0x01 Remote supports EVENT_ID 0x01 Remote supports EVENT_ID 0x02 Remote supports EVENT_ID 0x03 Remote supports EVENT_ID 0x04 Remote supports EVENT_ID 0x08 Remote supports EVENT_ID 0x0a Remote supports EVENT_ID 0x0b Remote supports EVENT_ID 0x0d automatically enable notifications Responding to event 0x1b failed with status 0x0c Responding to event 0x1b failed with status 0x0c Responding to event 0x1b failed with status 0x0c Responding to event 0x1b failed with status 0x0c AVRCP Target: PLAY AVRCP Target: PAUSE A2DP Source: Stream paused, a2dp_cid 0x01, local_seid 0x01 AVRCP Target: PLAY A2DP Source: Stream started, a2dp_cid 0x01, local_seid 0x01 Responding to event 0x1b failed with status 0x0c AVRCP Target: operation 0x4b is not handled ---when enter next command in bluetooth-player app on remote device AVRCP Target: operation 0x4c is not handled ---when enter previous command in bluetooth-player app on remote device AVRCP Target: operation 0x4b is not handled ---when enter next command in bluetooth-player app on remote device AVRCP Target: operation 0x4c is not handled ---when enter previous command in bluetooth-player app on remote device AVRCP Target: PAUSE A2DP Source: Stream paused, a2dp_cid 0x01, local_seid 0x01 AVRCP Target: STOP A2DP Source: Stream released, a2dp_cid 0x01, local_seid 0x01 A2DP Source: Stream released. AVRCP Target: Disconnected, avrcp_cid 0x01 A2DP Source: Signaling released.

remote device side log: root@imx8mqevk:~# bluetoothctl Agent registered [bluetooth]# paired-devices [bluetooth]# scan on Discovery started [CHG] Controller 20:4E:F6:BB:06:C6 Discovering: yes [NEW] Device 50:6E:D4:67:61:E9 50-6E-D4-67-61-E9 [NEW] Device 73:53:06:39:4A:A6 73-53-06-39-4A-A6 [NEW] Device 61:E0:90:98:67:C3 61-E0-90-98-67-C3

[bluetooth]# pair 00:1A:7D:DA:71:11 Attempting to pair with 00:1A:7D:DA:71:11 [CHG] Device 00:1A:7D:DA:71:11 Connected: yes [CHG] Device 00:1A:7D:DA:71:11 Modalias: bluetooth:v048Fp0001d0001 [CHG] Device 00:1A:7D:DA:71:11 UUIDs: 0000110a-0000-1000-8000-00805f9b34fb [CHG] Device 00:1A:7D:DA:71:11 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb [CHG] Device 00:1A:7D:DA:71:11 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb [CHG] Device 00:1A:7D:DA:71:11 UUIDs: 00001200-0000-1000-8000-00805f9b34fb [CHG] Device 00:1A:7D:DA:71:11 ServicesResolved: yes [CHG] Device 00:1A:7D:DA:71:11 Paired: yes Pairing successful [A2DP Source 00:1A:7D:DA:71:11]# trust 00:1A:7D:DA:71:11 [CHG] Device 00:1A:7D:DA:71:11 Trusted: yes Changing 00:1A:7D:DA:71:11 trust succeeded [CHG] Device 00:1A:7D:DA:71:11 ServicesResolved: no [CHG] Device 00:1A:7D:DA:71:11 Connected: no [bluetooth]# connect 00:1A:7D:DA:71:11 Attempting to connect to 00:1A:7D:DA:71:11 [CHG] Device 00:1A:7D:DA:71:11 Connected: yes Connection successful [CHG] Device 00:1A:7D:DA:71:11 ServicesResolved: yes [A2DP Source 00:1A:7D:DA:71:11]# paired-devices Device 00:1A:7D:DA:71:11 A2DP Source 00:1A:7D:DA:71:11 [A2DP Source 00:1A:7D:DA:71:11]# quit root@imx8mqevk:~# bluetooth-player [NEW] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 [default] [bluetooth]# [613341.821370] audit: type=1006 audit(1619598601.638:173): pid=86413 uid=0 old-auid=4294967295 auid=0 tty=(none) old-ses=4294967295 ses=172 res=1 [bluetooth]# play Attempting to play Play successful [bluetooth]# pause Attempting to pause Pause successful [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 Status: paused [bluetooth]# play Attempting to play Play successful [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 Status: playing [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 Title: Nao-deceased [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 TrackNumber: 0x000002 [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 NumberOfTracks: 0x000003 [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 Duration: 0x003039 [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 Album: A2DP Source Demo [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 Artist: Decease [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 Genre: vivid [bluetooth]# next Attempting to jump to next Next successful [bluetooth]# previous Attempting to jump to previous Previous successful [bluetooth]# next Attempting to jump to next Next successful [bluetooth]# previous Attempting to jump to previous Previous successful [bluetooth]# pause Attempting to pause Pause successful [CHG] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 Status: paused [bluetooth]# stop Attempting to stop Stop successful [DEL] Player /org/bluez/hci0/dev_00_1A_7D_DA_71_11/player0 [default] [bluetooth]# quit

[mringwal]

Hi. That's correct, next and previous are not implemented in the demo. It's not a problem of the AVRCP implementation itself. Good idea to let next/prev toggle between Nao Deceased and the Sine.