Portability | portable |
---|---|

Stability | provisional |

Maintainer | synthesizer@henning-thielemann.de |

- type T a = [a]
- type Modifier s ctrl a b = Simple s ctrl a b
- modifyStatic :: Modifier s ctrl a b -> ctrl -> T a -> T b
- modifyModulated :: Modifier s ctrl a b -> T ctrl -> T a -> T b
- type ModifierInit s init ctrl a b = Initialized s init ctrl a b
- modifierInitialize :: ModifierInit s init ctrl a b -> init -> Modifier s ctrl a b
- modifyStaticInit :: ModifierInit s init ctrl a b -> init -> ctrl -> T a -> T b
- modifyModulatedInit :: ModifierInit s init ctrl a b -> init -> T ctrl -> T a -> T b
- unfoldR :: (acc -> Maybe (y, acc)) -> acc -> (acc, T y)
- reduceL :: (x -> acc -> Maybe acc) -> acc -> T x -> acc
- mapAccumL :: (x -> acc -> Maybe (y, acc)) -> acc -> T x -> (acc, T y)
- crochetL :: (x -> acc -> Maybe (y, acc)) -> acc -> T x -> T y
- fix1 :: y -> (T y -> T y) -> T y
- dropMarginRem :: Int -> Int -> T a -> (Int, T a)
- dropMargin :: Int -> Int -> T a -> T a
- lengthAtLeast :: Int -> T a -> Bool
- zipWithTails :: (y0 -> T y1 -> y2) -> T y0 -> T y1 -> T y2
- zipWithRest :: (y0 -> y0 -> y1) -> T y0 -> T y0 -> (T y1, (Bool, T y0))
- zipWithRest' :: (y0 -> y0 -> y1) -> T y0 -> T y0 -> (T y1, (Bool, T y0))
- zipWithAppend :: (y -> y -> y) -> T y -> T y -> T y

# Documentation

# Generic routines that are useful for filters

modifyStatic :: Modifier s ctrl a b -> ctrl -> T a -> T bSource

modif is a process controlled by values of type c with an internal state of type s, it converts an input value of type a into an output value of type b while turning into a new state

ToDo: Shall finite signals be padded with zeros?

modifyModulated :: Modifier s ctrl a b -> T ctrl -> T a -> T bSource

Here the control may vary over the time.

type ModifierInit s init ctrl a b = Initialized s init ctrl a bSource

modifierInitialize :: ModifierInit s init ctrl a b -> init -> Modifier s ctrl a bSource

modifyStaticInit :: ModifierInit s init ctrl a b -> init -> ctrl -> T a -> T bSource

modifyModulatedInit :: ModifierInit s init ctrl a b -> init -> T ctrl -> T a -> T bSource

Here the control may vary over the time.

fix1 :: y -> (T y -> T y) -> T ySource

Feed back signal into signal processor,
and apply a delay by one value.
`fix1`

is a kind of `Signal.generate`

.

dropMarginRem :: Int -> Int -> T a -> (Int, T a)Source

`dropMarginRem n m xs`

drops at most the first `m`

elements of `xs`

and ensures that `xs`

still contains `n`

elements.
Additionally returns the number of elements that could not be dropped
due to the margin constraint.
That is `dropMarginRem n m xs == (k,ys)`

implies `length xs - m == length ys - k`

.
Requires `length xs >= n`

.

lengthAtLeast :: Int -> T a -> BoolSource

Test whether a list has at least `n`

elements.

zipWithAppend :: (y -> y -> y) -> T y -> T y -> T ySource