de.sciss.dsp

Fourier

trait Fourier extends AnyRef

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  1. abstract def complexForward(a: Array[Float]): Unit

  2. abstract def complexInverse(a: Array[Float]): Unit

  3. abstract def complexTransform(a: Array[Float], dir: Direction): Unit

    One-dimensional discrete complex fourier transform.

    One-dimensional discrete complex fourier transform. Replaces a[ 0...2*len ] by its discrete Fourier transform. In the inverse operation, a gain normalisierung by 1/len is applied automatically.

    a

    complex array with real part in a[ 0, 2, 4, ... 2*len - 2 ], imaginary part in a[ 1, 3, ... 2 * len -1 ]

    dir

    either Fourier.Inverse or Fourier.Forward

  4. abstract def realForward(a: Array[Float]): Unit

  5. abstract def realInverse(a: Array[Float]): Unit

  6. abstract def realTransform(a: Array[Float], dir: Direction): Unit

    One-dimensional discrete real fourier transform.

    One-dimensional discrete real fourier transform. Replaces a[ 0...len ] by its discrete Fourier transform (positive freq. half of the complex spectrum).

    Warning: a actually has len + 2 elements! in forward operation these last two elements must be zero.

    a

    real array; output is complex with real part in a[ 0, 2, 4, ... len ], imaginary part in a[ 1, 3, ... len + 1 ].

    dir

    use INVERSE or FORWARD

  7. abstract def size: Int

  8. abstract def threading: Threading

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