ossia::telemetry Namespace Reference

Detailed Description

Informative data going from the execution back to the user interface.

The audio thread never allocates, never locks and never loses a peak:

• every metering point (a tap) accumulates on its own writer thread;
• once per publication period, the tick thread gathers all taps into one frame at a fixed slot per tap and hands it over through a triple buffer;
• levels the interface has not read yet are merged into the next frame instead of being dropped, so the interface can read at any rate.

Slots are allocated by the interface, which pairs each index with a generation: a reader only trusts a slot whose generation it expects.

Classes
struct	bench_levels
	Time a node spent running over a span of frames. More...
struct	bench_tap
	One timed node, fed by the graph's executors. More...
struct	meter_levels
	Levels accumulated over a span of frames. More...
struct	meter_tap
	One metering point. Only its writer thread touches it while it is attached. More...
struct	playhead_tap

Enumerations
enum class	tap_kind : uint8_t { none , node , hardware_inputs , hardware_outputs }

Variables
constexpr std::size_t	max_meter_channels = 128

Enumeration Type Documentation

tap_kind

enum class ossia::telemetry::tap_kind : uint8_t

strong

Enumerator
node	fed by the graph, e.g. an audio outlet's post_process
hardware_inputs	fed by the tick from the driver's inputs
hardware_outputs	fed by the tick from the driver's outputs, after the mix