FpsCounter class

A simple 1-second rolling FPS counter for camera-preview apps.

Call tick once per processed frame; tick returns true at most once per second (when fps has been refreshed), so the caller can use its return value to decide whether to trigger a widget rebuild.

Usage:

final _fpsCounter = FpsCounter();
int _fps = 0;

void onFrame() {
  if (_fpsCounter.tick() && mounted) {
    setState(() => _fps = _fpsCounter.fps);
  }
}

Constructors

FpsCounter()

Properties

fps → int

The most recently computed FPS value. Starts at 0 until the first 1-second interval completes.

no setter

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

reset() → void

Reset all counters. Useful when switching cameras.

tick() → bool

Record a frame. Returns true when fps was refreshed (i.e. at most once per second); callers typically guard setState(...) on the result.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited