Struct symphonia_core::dsp::mdct::Imdct

pub struct Imdct { /* private fields */ }

The Inverse Modified Discrete Transform (IMDCT).

Implementations

impl Imdct

pub fn new(n: usize) -> Self

Instantiate a N-point IMDCT with no scaling.

The value of n is the number of spectral samples and must be a power-of-2 and less-than or equal to 2 * Fft::MAX_SIZE.

pub fn new_scaled(n: usize, scale: f64) -> Self

Instantiate a N-point IMDCT with scaling.

The value of n is the number of spectral samples and must be a power-of-2 and less-than or equal to 2 * Fft::MAX_SIZE.

pub fn imdct(&mut self, spec: &[f32], out: &mut [f32])

Performs the the N-point Inverse Modified Discrete Cosine Transform.

The number of input spectral samples provided by the slice spec must equal the value of N that the IMDCT was instantiated with. The length of the output slice, out, must be of length 2N. Failing to meet these requirements will throw an assertion.