Sound.WaveSurfer

Parse WaveSurfer files.

WaveSurfer is an application for analysing and annotating audio files. http://www.speech.kth.se/wavesurfer/

A WaveSurfer file consists of lines containing a label and corresponding onsets and offsets in seconds:

 onset offset label

This library supports an extended file format, where the first label can be followed by additional key-value pairs, separated by colons:

 onset offset label key1[:value1] key2[:value2] ...

Documentation

type Time = Double

Time type.

type DTime = Time

Type for time differences.

type Label = ByteString

Record label.

type Attribute = (Label, Maybe Label)

Key-value pair.

data Record

Record representing a single line in the WaveSurfer file.

Constructors

Record

Fields

onset :: Time

offset :: Time

label :: Label

attributes :: [Attribute]

Instances

Eq Record

Show Record

duration :: Record -> DTime

Return the duration of a Record in seconds.

type Result a = Either ParseError a

Result type.

encode :: Content -> ByteString

Encode Content to a lazy ByteString.

decode :: ByteString -> Result Content

Decode Content from a lazy ByteString.

interact :: (Record -> Record) -> ByteString -> Result ByteString