Audio::Fingerprint::Chromaprint

Get audio fingerprint using the chromaprint / AcoustID library

Synopsis

use Audio::Fingerprint::Chromaprint;
use Audio::Sndfile;

my $fp = Audio::Fingerprint::Chromaprint.new;

my $wav = Audio::Sndfile.new(filename => 'some.wav', :r);

$fp.start($wav.samplerate, $wav.channels);

# Read the whole file at once
my ( $data, $frames ) = $wav.read-short($wav.frames, :raw);

# You can feed multiple times
$fp.feed($data, $frames);

# call finish to indicate done feeding
$fp.finish;

say $fp.fingerprint;

Description

This provides a mechanism for obtaining a fingerprint of some audio data using the Chromaprint library, you can use this to identify recorded audio or determine whether two audio files are the same for instance.

You need several seconds worth of data in order to be able to get a usable fingerprint, and for comparison of two files you will need to ensure that you have the same number of samples, ideally you should fingerprint the entire audio file, but this may be slow if you have a large file.

Depending on how the Chromaprint library was built, it may or may not be safe to have multiple instances created at the same time, so it is probably safest to take care you only have a single instance in your application.

Installation

You will need the chromaprint library v1 installed for this to work, many operating system distributions will have a package that you can install with appropriate software. If you do not have a package available you may be able to build it from the source which can be found at https://acoustid.org/chromaprint.

Assuming you have a working Rakudo installation (and the chromaprint library,) then you should be able to install the module with zef :

zef install Audio::Fingerprint::Chromaprint

Support

This is a fairly simple library, but if you find a problem with it or have a suggestion how it can be improved then please raise a ticket at github.

Copyright & Licence

This is free software.