CfftPlan class

Reusable complex-input FFT plan (c2c) with internal native buffers.

Instances support both forward (fft) and inverse (ifft) transforms at a fixed transform size n. Call close to release native memory.

Example:

import 'dart:typed_data';
import 'package:open_dspc/open_dspc.dart';

final plan = CfftPlan(1024);
try {
  final re = SignalGenerator.sine(n: 1024, freqHz: 440, sampleRate: 16000);
  final im = Float32List(1024);
  final z = plan.fft(re, im);
  final x = plan.ifft(z.real, z.imag);
} finally {
  plan.close();
}

Inheritance

• Object
• NativeHandle<_CfftPlanResource>
• CfftPlan

Constructors

CfftPlan(int n)

Creates a reusable c2c FFT plan for transform length n.

factory

Properties

hashCode → int

The hash code for this object.

no setter, inherited

imag → Float32List

Reusable imaginary-part output buffer for fft and ifft.

final

isClosed → bool

Whether close() has been called.

no setter, inherited

n → int

FFT length used by this plan.

final

real → Float32List

Reusable real-part output buffer for fft and ifft.

final

res → _CfftPlanResource

Throws if closed; returns the native resource otherwise.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

close() → void

Deterministic cleanup.

inherited

fft(Float32List inRe, Float32List inIm) → Complex32List

Computes the complex forward FFT into the reusable real/imag buffers.

fftInto(Float32List inRe, Float32List inIm, Float32List outRe, Float32List outIm) → void

Zero-allocation forward complex FFT into caller-provided output buffers.

ifft(Float32List inRe, Float32List inIm) → Complex32List

Computes the complex inverse FFT into the reusable real/imag buffers.

ifftInto(Float32List inRe, Float32List inIm, Float32List outRe, Float32List outIm) → void

Zero-allocation inverse complex FFT into caller-provided output buffers.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited