Those issues were found via https://github.com/google/atheris

This should close #151

atenart authored 6 years ago and jvoisin committed 6 years ago

Not all id3 types have a text attribute (such as mutagen.id3.APIC or
mutagen.id3.UFID). This leads to the get_meta helper to crash when
trying to access the text attribute of an object which does not have it.
Fixes it by checking the text attribute is available before accessing
it.

Signed-off-by: Antoine Tenart <antoine.tenart@ack.tf>

Since FLAC files can contain covers, it makes sense
to parse their metadata

The FLAC parser looks for the 'audio/flac' mime type, but Fedora
defines 'audio/x-flac' in /etc/mime.types for FLAC files. Add this mime
type to the audio parser.

Fixes #36.

Signed-off-by: Antoine Tenart <antoine.tenart@ack.tf>

- the `src` folder is now `libmat2`
- the `main.py` script is now `mat2.py`

- Normalize the case
- Strip \00, \r, space and \n
- Flatten metadata lists
- Add tests for audio files