Sampled Data Duration

Rust library for handling durations of sampled data, e.g. digital audio.

The sampled_data_duration crate provides two stucts: ConstantRateDuration and MixedRateDuration.

A ConstantRateDuraiton can be used to represents the duration of any data-set which has been sampled at a constant frequency, a prime example might be an audio file sampled at 44.1kHz.

A MixedRateDuration can be used to represent the duration of a collection of data-sets which have different sampling frequencies. A typical example might be a playlist of audio files where some have been sampled at 44.1kHz, and others at 48kHz or 96kHz, etc.

Example

```rust use sampleddataduration::ConstantRateDuration; use sampleddataduration::MixedRateDuration;

// Consider an audio file which consists of 12345678 samples per // channel recorded at a sampling rate of 44.1kHz. let crd = ConstantRateDuration::new(12345678, 44100);

// The default string representation is of the form // hh:mm:ss;samples asserteq!(crd.tostring(), "00:04:39;41778");

// Get the duration in various different time-units asserteq!(crd.ashours(), 0); asserteq!(crd.asmins(), 4); asserteq!(crd.subminsecs(), 39); asserteq!(crd.assecs(), 4 * 60 + 39); asserteq!(crd.subsecsamples(), 41778); asserteq!(crd.subsecsecs(), 0.9473469387755102);

// Consider and audio playlist which already consists of a file // recorded at 96kHz. let mut mrd = MixedRateDuration::from(ConstantRateDuration::new(87654321, 96000));

// The default string representation of the a mixed rate duration // which consits of only one entry is of the form hh:mm:ss;samples asserteq!(mrd.tostring(), "00:15:13;6321");

// However if we add-assign crd to mrd mrd += crd;

// Then we have a duration which is made up of different sampling // rates and the default string representation changes to be of the // form hh:mm:ss.s asserteq!(mrd.tostring(), "00:19:53.013190688"); ```

An attempt has been made to follow the naming conventions defined by std::time::Duration.