Bluetooth Profile: AVRCP Target

The AVRCP Target component is the intermediary between the core AVRCP component and active media on the device. The component provides a distinct abstraction between the business logic of AVRCP and the state of the currently playing media. AVRCP Target subscribes to updates about registered media sessions and relays the information to the core AVRCP component.

Build Configuration

Follow the steps for the AVRCP build configuration and add --with //src/connectivity/bluetooth/profiles/bt-avrcp-target to include AVRCP-Target in your build.

To run the component:

1. fx shell
2. run bt-avrcp-target.cmx

Running Tests

AVRCP Target relies on unit tests to validate behavior. To run the tests, add --with //src/connectivity/bluetooth/profiles/bt-avrcp-target:tests to your build.

To run the tests:

fx test bt-avrcp-target-tests

Code Layout

The code is split into the aforementioned AVRCP-Media abstraction.

media mod

• Responsible for listening to and updating media-related state.
• Processes updates from the currently active MediaSession using the fuchsia.media.sessions2 FIDL service.
• Populates the thread-safe MediaSessions object with changes in state.
• MediaSessions provides an interface to query and modify relevant information about the current session.

avrcp_handler mod

• Registers a new TargetHandler using the fuchsia.bluetooth.avrcp.PeerManager FIDL service.
• Processes requests over the fuchsia.bluetooth.avrcp.TargetHandler FIDL protocol.
• Queries MediaSessions to get the latest information about the session.
• Updates AVRCP with status, control, and notification changes.