Gaia is a C++ library with python bindings which implements similarity measures and classifications on the results of audio analysis, and generates classification models that Essentia can use to compute high-level description of music.

Licence: Affero GPLv3 license

Documentation: http://essentia.upf.edu/documentation/gaia

Dependencies:

• Qt >= 4.5
• libYAML >= 0.1.1
• Python >= 2.4
• SWIG != 3.0.8
• waf >= 1.9
• Eigen 3.3.4 patched version (included in source)

• All features work except project_file.py. Build with --with-cyclops(for qt4) works as before. Testing --with-cyclops --with-gaia-qt5but it seems to function as before.

• With python3 running python3 tests.py

  Ran 91 tests in 61.252s

  FAILED (failures=5, errors=36) Unresolved python3 issues with select,enumerateand filtering. Once implemented most failures and errors will disappear. None of these c++ code changes will be present in the gaiauntil they work.

  After building documentation build/src/bindings/gaia2.py must have # -*- coding: utf-8 -*- as first or second line. This is automatically handled. Switching from python2 to python3may require build folder to be removed.

• With python2 running python2 tests.py

  Ran 91 tests in 61.252s

  FAILED (failures=5, errors=37) Unresolved python2 issues.

• Install dependencies (Ubuntu/Debian)

  $ apt-get install build-essential libqt4-dev libyaml-dev swig python-dev pkg-config doxygen 
  

  ​ or for Qt5

  $ apt-get install build-essential qt5-default qtbase5-dev libyaml-dev swig python3-dev pkg-config doxygen
  

  Note that Gaia build may fail if you are using swig 3.0.8. Install either a previous or later version. The newest swig version is available from source (https://github.com/swig/swig).

  ​

• Relase Notes: Eigen 3.3.4is provided with source code since one header file was missing from the releasearchive and for c++11 compatibility. Previous Eigenhad too many missing header or include files for version certainty. #define Vector was replaced by std::vector to eliminate c++11 errors. Location of Eigen headers changed to 3rdparty/Eigenrather than Eigen. Waf2.0.6is used primarily because it handles Qt5and themoc files required for cyclops. libtbb-devcan optionally be installed but the check for tbb has been removed from the build process because it didn't work. Python2.7.15and python3.6.3both have been tested. However, not all versions of python have been used. Python packages are located at either /usr/local/lib/python2.7/dist-packages or /usr/local/lib/python3.6/dist-packagesand utilize the major and minor python version numbers. Addendum: All tabs converted to spaces

  find ./ -iname '*.h' -type f -exec bash -c 'expand -t 4 "$0" | sponge "$0"' {} \;

  find ./ -iname '*.cpp' -type f -exec bash -c 'expand -t 4 "$0" | sponge "$0"' {} \;

  find ./ -iname '*.py' -type f -exec bash -c 'expand -t 2 "$0" | sponge "$0"' {} \;

• Online help is available for WAF or in build system home folder.

  $ git clone https://github.com/waf-project/waf.git
  $ cd waf
  $ ./waf-light --help
  $ ./waf-light configure --tools=swig,qt5,qt4 build
  $ cp waf ~/gaia/.
  

• Configure gaia with the desired options, if python3 wanted use

  $ python3 ./waf configure [--with-python] [--with-stlfacade] [--with-asserts] 
  [--with-cyclops] [--with-tests] [--with-gaia-qt5]
  

  NOTE: in order to link Essentia library with Gaia, do not use --with-stlfacade option

• Compile libgaia.aor _gaia2.so:

  $ python3 ./waf
  

• Install (to install system-wide you might need sudo)

  $ python3 ./waf install [--destdir=/where/ever/]
  

  NOTE: be careful to use python3 consistently as ./waf installon its own will use the default python.

• Build documentation (optional or online), it will be located at build/doc/ folder

  $ python3 src/doc/regenerate_docstring.py
  

• Install Qt4:

  brew install cartr/qt4/qt
  

• Install homebrew tap:

  brew tap MTG/essentia
  

• Build Gaia (this will also install all the dependencies)

  brew install gaia --HEAD
  

• Install python, qt libraries 4.8, libYAML and swig dependencies using homebrew:

  $ brew install python --framework
  $ brew install swig libyaml cartr/qt4/qt
  

• Install pyyaml pip package in case use want to build with python bindings:

  $ pip install pyyaml
  

• Configure and build similarly to Linux (see above).

(Gaia2lib)

• install qt libraries 4.8 (including debug libraries) and QtCreator from http://qt-project.org/downloads

• install libYAML and swig dependencies using homebrew (we assume you already have a python installation, otherwise you can also install it using homebrew):

  $ brew install swig
  $ brew install libyaml
  

• use QtCreator to open the project file 'Gaia2lib.pro' in packaging/darwin/Gaia2lib/

• compile the project (you will probably need to configure QtCreator to work with your Qt installation and also to set up the build folder for the project)

(Gaia2Python - python bindings)

• use swig to generate the file 'gaia_wrap.cxx' that will be needed to compile 'Gaia2Python':

  $ swig -c++ -python -w451 /path_to_gaia_source/src/bindings/gaia.swig 
  

• copy the generated 'gaia_wrap.cxx' to the Gaia2Python project folder:

  $ cp /path_to_gaia_source/src/bindings/gaia_wrap.cxx /path_to_gaia_source/packaging/darwin/Gaia2Python/
  

• use QtCreator to open the project file 'Gaia2Python.pro' in packaging/darwin/Gaia2Python/ and compile

• run ./make_release_tarball in packaging/darwin:

  $ ./make_release_tarball
  

• copy the folder packaging/darwin/tmp/gaia2/python/gaia2 (created when running make_release_tarball.sh) to the site-packages directory of your python distribution. you can now import gaia2 from python

• use the QtCreator projects inside the packaging/win32 directory (not tested).
• using msys64and mingw64_shell.batpartially works but is currently not available and untested.

This library contains source code from the LibSVM project, which is distributed under the revised BSD license. Please refer to the src/3rdparty/libsvm/COPYRIGHT file for more information.

This library contains the Mersenne Twister random number generator, which is distributed under the BSD license.

This library contains source code from the Alglib project (http://www.alglib.net), which is distributed under the 3-clause BSD license.

This library contains source code from the Eigen project (http://eigen.tuxfamily.org/), which is distributed under the LGPLv3 license.

Cyclops for Qt5 contains source code from the Qt project deprecated APIs which have been removed from Qt (https://github.com/qt/qthttp), which is distributed under the terms specified under GNU GPLv3 license. These have been heavily reorder to eliminate compile errors.

This library contains source code from FrogLogic command line parser (http://www.froglogic.com/pg?id=PublicationsFreeware&category=getopt) which is distributed under the BSD license.