Struct rustdct::algorithm::Type2And3ConvertToFft

pub struct Type2And3ConvertToFft<T> { /* private fields */ }

DCT2, DST2, DCT3, and DST3 implementation that converts the problem into a FFT of the same size

// Computes a O(NlogN) DCT2, DST2, DCT3, and DST3 of size 1234 by converting them to FFTs
use rustdct::{Dct2, Dst2, Dct3, Dst3};
use rustdct::algorithm::Type2And3ConvertToFft;
use rustdct::rustfft::FftPlanner;

let len = 1234;
let mut planner = FftPlanner::new();
let fft = planner.plan_fft_forward(len);

let dct = Type2And3ConvertToFft::new(fft);

let mut dct2_buffer = vec![0f32; len];
dct.process_dct2(&mut dct2_buffer);

let mut dst2_buffer = vec![0f32; len];
dct.process_dst2(&mut dst2_buffer);

let mut dct3_buffer = vec![0f32; len];
dct.process_dct3(&mut dct3_buffer);

let mut dst3_buffer = vec![0f32; len];
dct.process_dst3(&mut dst3_buffer);

Implementations

impl<T: DctNum> Type2And3ConvertToFft<T>

pub fn new(inner_fft: Arc<dyn Fft<T>>) -> Self

Creates a new DCT2, DST2, DCT3, and DST3 context that will process signals of length inner_fft.len().

Trait Implementations

impl<T: DctNum> Dct2<T> for Type2And3ConvertToFft<T>

fn process_dct2_with_scratch(&self, buffer: &mut [T], scratch: &mut [T])

Computes the DCT Type 2 on the provided buffer, in-place. Uses the provided scratch buffer as scratch space.

fn process_dct2(&self, buffer: &mut [T])

Computes the DCT Type 2 on the provided buffer, in-place.

impl<T: DctNum> Dct3<T> for Type2And3ConvertToFft<T>

fn process_dct3_with_scratch(&self, buffer: &mut [T], scratch: &mut [T])

Computes the DCT Type 3 on the provided buffer, in-place. Uses the provided scratch buffer as scratch space.

fn process_dct3(&self, buffer: &mut [T])

Computes the DCT Type 3 on the provided buffer, in-place.

impl<T: DctNum> Dst2<T> for Type2And3ConvertToFft<T>

fn process_dst2_with_scratch(&self, buffer: &mut [T], scratch: &mut [T])

Computes the DST Type 2 on the provided buffer, in-place. Uses the provided scratch buffer as scratch space.

fn process_dst2(&self, buffer: &mut [T])

Computes the DST Type 2 on the provided buffer, in-place.

impl<T: DctNum> Dst3<T> for Type2And3ConvertToFft<T>

fn process_dst3_with_scratch(&self, buffer: &mut [T], scratch: &mut [T])

Computes the DST Type 3 on the provided buffer, in-place. Uses the provided scratch buffer as scratch space.

fn process_dst3(&self, buffer: &mut [T])

Computes the DST Type 3 on the provided buffer, in-place.

impl<T> Length for Type2And3ConvertToFft<T>

fn len(&self) -> usize

The FFT size that this algorithm can process

impl<T: DctNum> RequiredScratch for Type2And3ConvertToFft<T>

fn get_scratch_len(&self) -> usize

impl<T: DctNum> TransformType2And3<T> for Type2And3ConvertToFft<T>