SampleType » History » Version 8
Version 7 (Chris Cannam, 2014-02-10 12:09 PM) → Version 8/72 (Chris Cannam, 2014-02-10 01:04 PM)
h1. Output Sample Type and Sample Rate
A Vamp plugin takes audio as input, as a series of process blocks with associated timestamps, and returns a series of "feature" structures. These features are associated with a particular output of the plugin. "feature structures". (See diagram.)
Each returned feature might have a timestamp... or it might not. Whether a timestamp is provided -- and, if it is provided, what it means -- are determined by the @SampleType@ and @SampleRate@ properties of the plugin output that returns the feature.
!/attachments/download/980/feature-structures-20pc.png!
h2. SampleType Sample Type
A plugin output's @SampleType@ property may be either @OneSamplePerStep@, @FixedSampleRate@, or @VariableSampleRate@. Here's what they mean.
h3. OneSamplePerStep
This is the simplest option.
A Vamp plugin takes audio as input, as a series of process blocks with associated timestamps, and returns a series of "feature" structures. These features are associated with a particular output of the plugin. "feature structures". (See diagram.)
Each returned feature might have a timestamp... or it might not. Whether a timestamp is provided -- and, if it is provided, what it means -- are determined by the @SampleType@ and @SampleRate@ properties of the plugin output that returns the feature.
!/attachments/download/980/feature-structures-20pc.png!
h2. SampleType Sample Type
A plugin output's @SampleType@ property may be either @OneSamplePerStep@, @FixedSampleRate@, or @VariableSampleRate@. Here's what they mean.
h3. OneSamplePerStep
This is the simplest option.