Services

High-level services built on top of the drivers and bsp layers. More...

Collaboration diagram for Services:

Topics
	Audio sink interface
	Output-agnostic PCM sink: the pipeline writes frames here without knowing whether they go to the wired DAC or to Bluetooth A2DP.
	Audio decoder
	Decode an MP3 or WAV file into PCM for an Audio sink interface.
	Audio pipeline
	Real-time task feeding PCM from a source to an Audio sink interface.
	Playback transport
	play/pause/resume/stop/next/prev over the playlist, with auto-advance on EOF.
	Playlist service
	Current track + next/prev navigation over the storage index (no hardware).
	Track metadata
	Read tags + format from a file without playing it (for now_playing and the browser).
	Volume service
	Sole writer of the PCM5242 digital volume (pot -> DAC, with L/R balance).
	Autonomy test service
	Self-measured battery autonomy: workload run + discharge-curve logging.
	Bluetooth service
	Classic Bluetooth A2DP source stack and connection management.
	Diagnostics service
	Opt-in FreeRTOS stack / run-time / heap measurement for the characterisation campaign.
	Input service
	Buttons -> ui_event_t queue, interrupt-driven and discrete (one press, one event).
	Input logic (pure)
	Debounce + press-edge detection + button->ui_event mapping, no hardware.
	Maintenance service
	Shared low-priority task that periodically drives background chores.
	Power service
	Battery state, charge detection, low-battery policy, and power on/off.
	Settings service
	Persistent key/value store for user preferences (NVS-backed).
	Storage service
	Enumerate the SD card's playable tracks and serve them by index.

Detailed Description

High-level services built on top of the drivers and bsp layers.