Here is a list of all files with brief descriptions:

taglib
ape
apefile.h
apefooter.h
apeitem.h
apeproperties.h
apetag.h
asf
asfattribute.h
asffile.h
asfpicture.h
asfproperties.h
asftag.h
asfutils.h
dsdiff
dsdiffdiintag.h
dsdifffile.h
dsdiffproperties.h
dsf
dsffile.h
dsfproperties.h
flac
flacfile.h
flacmetadatablock.h
flacpicture.h
flacproperties.h
flacunknownmetadatablock.h
it
itfile.h
itproperties.h
matroska
ebml
ebmlbinaryelement.h
ebmldeferredbinaryelement.h
ebmlelement.h
ebmlfloatelement.h
ebmlmasterelement.h
ebmlmkattachments.h
ebmlmkchapters.h
ebmlmkcues.h
ebmlmkinfo.h
ebmlmkseekhead.h
ebmlmksegment.h
ebmlmktags.h
ebmlmktracks.h
ebmlstringelement.h
ebmluintelement.h
ebmlutils.h
ebmlvoidelement.h
matroskaattachedfile.h
matroskaattachments.h
matroskachapter.h
matroskachapteredition.h
matroskachapters.h
matroskacues.h
matroskaelement.h
matroskafile.h
matroskaproperties.h
matroskaseekhead.h
matroskasegment.h
matroskasimpletag.h
matroskatag.h
matroskawritestyle.h
mod
modfile.h
modfilebase.h
modfileprivate.h
modproperties.h
modtag.h
mp4
mp4atom.h
mp4chapter.h
mp4chapterholder.h
mp4coverart.h
mp4file.h
mp4item.h
mp4itemfactory.h
mp4nerochapterlist.h
mp4properties.h
mp4qtchapterlist.h
mp4stem.h
mp4tag.h
mpc
mpcfile.h
mpcproperties.h
mpeg
id3v1
id3v1genres.h
id3v1tag.h
id3v2
frames
attachedpictureframe.h
chapterframe.h
commentsframe.h
eventtimingcodesframe.h
generalencapsulatedobjectframe.h
ownershipframe.h
podcastframe.h
popularimeterframe.h
privateframe.h
relativevolumeframe.h
synchronizedlyricsframe.h
tableofcontentsframe.h
textidentificationframe.h
uniquefileidentifierframe.h
unknownframe.h
unsynchronizedlyricsframe.h
urllinkframe.h
id3v2.h
id3v2extendedheader.h
id3v2footer.h
id3v2frame.h
id3v2framefactory.h
id3v2header.h
id3v2synchdata.h
id3v2tag.h
mpegfile.h
mpegheader.h
mpegproperties.h
mpegutils.h
xingheader.h
ogg
flac
oggflacfile.h
opus
opusfile.h
opusproperties.h
speex
speexfile.h
speexproperties.h
vorbis
vorbisfile.h
vorbisproperties.h
oggfile.h
oggpage.h
oggpageheader.h
xiphcomment.h
riff
aiff
aifffile.h
aiffproperties.h
wav
infotag.h
wavfile.h
wavproperties.h
rifffile.h
riffutils.h
s3m
s3mfile.h
s3mproperties.h
shorten
shortenfile.h
shortenproperties.h
shortentag.h
shortenutils.h
toolkit
taglib.h
tbytevector.h
tbytevectorlist.h
tbytevectorstream.h
tdebug.h
tdebuglistener.h
tfile.h
tfilestream.h
tiostream.h
tlist.h
tmap.h
tpicturetype.h
tpropertymap.h
tstring.h
tstringlist.h
tutils.h
tvariant.h
tversionnumber.h
tzlib.h
trueaudio
trueaudiofile.h
trueaudioproperties.h
wavpack
wavpackfile.h
wavpackproperties.h
xm
xmfile.h
xmproperties.h
audioproperties.h
fileref.h
tag.h
taglib_export.h
tagunion.h
tagutils.h