full id3v2 tag support with all its fields

[ciros88]

also could be useful to prefer showing id3v2 single fields over id3v1 when they are present

[aargirakis]

I think I've added everything, what do you miss?

[ciros88]

Seems that with mp3s having both v1 and v2 tags the latter shows only a couple of fields

[ciros88]

some examples: mp3s.zip

[ciros88]

these mp3s have missing fields (like artist, that seems under the "lead perfo..." field): Rayman.zip

[ciros88]

current id3 tag handling: all infos are simply get from FMOD and displayed as is, this means using the FMOD fields order and displaying multiple id3 tag versions.

desired strategy for handling id3 tags: display a list of common/relevant fields in the following fixed order (we can further discuss about this order (e.g. putting comment before track number, etc):

Title Artist Album Date Track Number Comment Genre Publisher Copyright

all the fields not present in this static list (the uncommon ones, as well as the custom ones) will be getted from FMOD and displayed as is (as currently happens)

specifications (valid for all fields):

• if a field is not present then it shouldn't be displayed (avoid empty fields for freeing up space)
• if multiple id3 tags exists for same field, then the one from more recent version should be displayed (users are really not interested to see multiple whole id3 tag versions)

this implementation should makes appear the id3 tag fields of these 3 tracks arranged as the same: tracks.zip

this implementation could also solve #316

[ciros88]

also i think we could "group" some non common tags in single ones, like kid3/easytag/foobar200 do: https://wiki.hydrogenaud.io/index.php?title=Foobar2000:ID3_Tag_Mapping

here, for example:

• showing "Artist" is better than "Lead performer(s)/Soloist(s)"
• showing "Album Artist" is better than "Band/orchestra/accompaniment"

maybe those detailed infos could be showed with mouse hoovering only