| .. _bluetooth_shell_audio: |
| |
| Bluetooth: Basic Audio Profile |
| ############################## |
| |
| This document describes how to run Basic Audio Profile functionality which |
| includes: |
| |
| - Capabilities and Endpoint discovery |
| - Audio Stream Endpoint procedures |
| |
| Commands |
| ******** |
| |
| .. code-block:: console |
| |
| bap --help |
| Subcommands: |
| init |
| select_broadcast :<stream> |
| create_broadcast :[preset <preset_name>] [enc <broadcast_code>] |
| start_broadcast : |
| stop_broadcast : |
| delete_broadcast : |
| broadcast_scan :<on, off> |
| accept_broadcast :0x<broadcast_id> |
| sync_broadcast :0x<bis_index> [[[0x<bis_index>] 0x<bis_index>] ...] |
| stop_broadcast_sink :Stops broadcast sink |
| term_broadcast_sink : |
| discover :[dir: sink, source] |
| config :<direction: sink, source> <index> [loc <loc_bits>] [preset <preset_name>] |
| stream_qos :interval [framing] [latency] [pd] [sdu] [phy] [rtn] |
| qos :Send QoS configure for Unicast Group |
| enable :[context] |
| stop |
| print_ase_info :Print ASE info for default connection |
| metadata :[context] |
| start |
| disable |
| release |
| list |
| select_unicast :<stream> |
| preset :<sink, source, broadcast> [preset] |
| send :Send to Audio Stream [data] |
| start_sine :Start sending a LC3 encoded sine wave |
| stop_sine :Stop sending a LC3 encoded sine wave |
| set_location :<direction: sink, source> <location bitmask> |
| set_context :<direction: sink, source><context bitmask> <type: |
| supported, available> |
| |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Command", "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "init","none","any","none" |
| "discover","init","any","any" |
| "config","discover","idle/codec-configured/qos-configured","codec-configured" |
| "qos","config","codec-configured/qos-configured","qos-configured" |
| "enable","qos","qos-configured","enabling" |
| "[start]","enable","enabling","streaming" |
| "disable","enable", "enabling/streaming","disabling" |
| "[stop]","disable","disabling","qos-configure/idle" |
| "release","config","any","releasing/codec-configure/idle" |
| "list","none","any","none" |
| "select_unicast","none","any","none" |
| "connect","discover","idle/codec-configured/qos-configured","codec-configured" |
| "send","enable","streaming","none" |
| |
| Example Central |
| *************** |
| |
| Connect and establish a stream: |
| |
| .. code-block:: console |
| |
| uart:~$ bt init |
| uart:~$ bap init |
| uart:~$ bt connect <address> |
| uart:~$ gatt exchange-mtu |
| uart:~$ bap discover sink |
| uart:~$ bap config sink 0 |
| uart:~$ bap qos |
| uart:~$ bap enable |
| |
| Or using connect command: |
| |
| .. code-block:: console |
| |
| uart:~$ bt init |
| uart:~$ bap init |
| uart:~$ bt connect <address> |
| uart:~$ gatt exchange-mtu |
| uart:~$ bap discover sink |
| uart:~$ bap connect sink 0 |
| |
| Disconnect and release: |
| |
| .. code-block:: console |
| |
| uart:~$ bap disable |
| uart:~$ bap release |
| |
| Example Peripheral |
| ****************** |
| |
| Listen: |
| |
| .. code-block:: console |
| |
| uart:~$ bt init |
| uart:~$ bap init |
| uart:~$ bt advertise on |
| |
| Server initiated disable and release: |
| |
| .. code-block:: console |
| |
| uart:~$ bap disable |
| uart:~$ bap release |
| |
| Example Broadcast Source |
| ************************ |
| |
| Create and establish a broadcast source stream: |
| |
| .. code-block:: console |
| |
| uart:~$ bap init |
| uart:~$ bap create_broadcast |
| uart:~$ bap start_broadcast |
| |
| Stop and release a broadcast source stream: |
| |
| .. code-block:: console |
| |
| uart:~$ bap stop_broadcast |
| uart:~$ bap delete_broadcast |
| |
| |
| Example Broadcast Sink |
| ************************ |
| |
| Scan for and establish a broadcast sink stream: |
| |
| .. code-block:: console |
| |
| uart:~$ bap init |
| uart:~$ bap broadcast_scan on |
| Found broadcaster with ID 0xB91CD4 |
| uart:~$ bap accept_broadcast 0xB91CD4 |
| PA syncing to broadcaster |
| Broadcast scan was terminated: 0 |
| PA synced to broadcaster with ID 0xB91CD4 as sink 0x2000d09c |
| Sink 0x2000d09c is set as default |
| Sink 0x2000d09c is ready to sync without encryption |
| Received BASE from sink 0x2000d09c: |
| Subgroup[0]: |
| codec 0x06 cid 0x0000 vid 0x0000 count 4 |
| data #0: type 0x01 len 1 |
| data #1: type 0x02 len 1 |
| data #2: type 0x03 len 4 |
| 00000000: 00 00 00 |... | |
| data #3: type 0x04 len 2 |
| 00000000: 28 |( | |
| meta #0: type 0x02 len 2 |
| BIS[0] index 0x01 |
| [0]: 0x01 |
| Possible indexes: 0x01 |
| uart:~$ bap sync_broadcast 0x01 |
| |
| Stop and release a broadcast sink stream: |
| |
| .. code-block:: console |
| |
| uart:~$ bap stop_broadcast_sink |
| uart:~$ bap term_broadcast_sink |
| |
| Init |
| **** |
| |
| The :code:`init` command register local PAC records which are necessary to be |
| able to configure stream and properly manage capabilities in use. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "none","any","none" |
| |
| .. code-block:: console |
| |
| uart:~$ bap init |
| |
| Discover PAC(s) and ASE(s) |
| ************************** |
| |
| Once connected the :code:`discover` command discover PAC records and ASE |
| characteristics representing remote endpoints. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "init","any","any" |
| |
| .. note:: |
| |
| Use command :code:`gatt exchange-mtu` to make sure the MTU is configured |
| properly. |
| |
| .. code-block:: console |
| |
| uart:~$ gatt exchange-mtu |
| Exchange pending |
| Exchange successful |
| uart:~$ bap discover [type: sink, source] |
| uart:~$ bap discover sink |
| cap 0x8175940 type 0x01 |
| codec 0x06 cid 0x0000 vid 0x0000 count 4 |
| data #0: type 0x01 len 1 |
| 00000000: 3f |? | |
| data #1: type 0x02 len 1 |
| 00000000: 03 |. | |
| data #2: type 0x03 len 1 |
| 00000000: 03 |. | |
| data #3: type 0x04 len 4 |
| 00000000: 1e 00 f0 00 |.... | |
| meta #0: type 0x01 len 2 |
| 00000000: 06 00 |.. | |
| meta #1: type 0x02 len 2 |
| 00000000: ff 03 |.. | |
| ep 0x81754e0 |
| ep 0x81755d4 |
| Discover complete: err 0 |
| |
| Select preset |
| ************* |
| |
| The :code:`preset` command can be used to either print the default preset |
| configuration or set a different one, it is worth noting that it doesn't change |
| any stream previously configured. |
| |
| .. code-block:: console |
| |
| uart:~$ bap preset <sink, source, broadcast> [preset] |
| uart:~$ bap preset sink |
| 16_2_1 |
| codec 0x06 cid 0x0000 vid 0x0000 count 4 |
| data #0: type 0x01 len 1 |
| data #1: type 0x02 len 1 |
| data #2: type 0x03 len 4 |
| 00000000: 01 00 00 |... | |
| data #3: type 0x04 len 2 |
| 00000000: 28 |( | |
| meta #0: type 0x02 len 2 |
| 00000000: 06 |. | |
| QoS: interval 10000 framing 0x00 phy 0x02 sdu 40 rtn 2 latency 10 pd 40000 |
| |
| uart:~$ bap preset sink 32_2_1 |
| 32_2_1 |
| codec 0x06 cid 0x0000 vid 0x0000 count 4 |
| data #0: type 0x01 len 1 |
| data #1: type 0x02 len 1 |
| data #2: type 0x03 len 4 |
| 00000000: 01 00 00 |... | |
| data #3: type 0x04 len 2 |
| 00000000: 50 |P | |
| meta #0: type 0x02 len 2 |
| 00000000: 06 |. | |
| QoS: interval 10000 framing 0x00 phy 0x02 sdu 80 rtn 2 latency 10 pd 40000 |
| |
| |
| Configure Codec |
| *************** |
| |
| The :code:`config` command attempts to configure a stream for the given |
| direction using a preset codec configuration which can either be passed directly |
| or in case it is omitted the default preset is used. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "discover","idle/codec-configured/qos-configured","codec-configured" |
| |
| .. code-block:: console |
| |
| uart:~$ bap config <direction: sink, source> <index> [loc <loc_bits>] [preset <preset_name>] |
| uart:~$ bap config sink 0 |
| ASE Codec Config: conn 0x8173800 ep 0x81754e0 cap 0x816a360 |
| codec 0x06 cid 0x0000 vid 0x0000 count 3 |
| data #0: type 0x01 len 1 |
| 00000000: 02 |. | |
| data #1: type 0x02 len 1 |
| 00000000: 01 |. | |
| data #2: type 0x04 len 2 |
| 00000000: 28 00 |(. | |
| meta #0: type 0x02 len 2 |
| 00000000: 02 00 |.. | |
| ASE Codec Config stream 0x8179e60 |
| Default ase: 1 |
| ASE config: preset 16_2_1 |
| |
| Configure Stream QoS |
| ******************** |
| |
| The :code:`stream_qos` Sets a new stream QoS. |
| |
| .. code-block:: console |
| |
| uart:~$ bap stream_qos <interval> [framing] [latency] [pd] [sdu] [phy] [rtn] |
| uart:~$ bap stream_qos 10 |
| |
| Configure QoS |
| ************* |
| |
| The :code:`qos` command attempts to configure the stream QoS using the preset |
| configuration, each individual QoS parameter can be set with use optional |
| parameters. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "config","qos-configured/codec-configured","qos-configured" |
| |
| .. code-block:: console |
| |
| uart:~$ bap qos |
| |
| Enable |
| ****** |
| |
| The :code:`enable` command attempts to enable the stream previously configured, |
| if the remote peer accepts then the ISO connection procedure is also initiated. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "qos","qos-configured","enabling" |
| |
| .. code-block:: console |
| |
| uart:~$ bap enable [context] |
| uart:~$ bap enable Media |
| |
| Start |
| ***** |
| |
| The :code:`start` command is only necessary when acting as a sink as it |
| indicates to the source the stack is ready to start receiving data. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "enable","enabling","streaming" |
| |
| .. code-block:: console |
| |
| uart:~$ bap start |
| |
| Disable |
| ******* |
| |
| The :code:`disable` command attempts to disable the stream previously enabled, |
| if the remote peer accepts then the ISO disconnection procedure is also |
| initiated. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "enable","enabling/streaming","disabling" |
| |
| .. code-block:: console |
| |
| uart:~$ bap disable |
| |
| Stop |
| **** |
| |
| The :code:`stop` command is only necessary when acting as a sink as it indicates |
| to the source the stack is ready to stop receiving data. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "disable","disabling","qos-configure/idle" |
| |
| .. code-block:: console |
| |
| uart:~$ bap stop |
| |
| Release |
| ******* |
| |
| The :code:`release` command releases the current stream and its configuration. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "config","any","releasing/codec-configure/idle" |
| |
| .. code-block:: console |
| |
| uart:~$ bap release |
| |
| List |
| **** |
| |
| The :code:`list` command list the available streams. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "none","any","none" |
| |
| .. code-block:: console |
| |
| uart:~$ bap list |
| *0: ase 0x01 dir 0x01 state 0x01 |
| |
| Select Unicast |
| ************** |
| |
| The :code:`select_unicast` command set a unicast stream as default. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "none","any","none" |
| |
| .. code-block:: console |
| |
| uart:~$ bap select <ase> |
| uart:~$ bap select 0x01 |
| Default stream: 1 |
| |
| To select a broadcast stream: |
| |
| .. code-block:: console |
| |
| uart:~$ bap select 0x01 broadcast |
| Default stream: 1 (broadcast) |
| |
| Send |
| **** |
| |
| The :code:`send` command sends data over BAP Stream. |
| |
| .. csv-table:: State Machine Transitions |
| :header: "Depends", "Allowed States", "Next States" |
| :widths: auto |
| |
| "enable","streaming","none" |
| |
| .. code-block:: console |
| |
| uart:~$ bap send [count] |
| uart:~$ bap send |
| Audio sending... |
