bool SoundSource::processXiphComment(TagLib::Ogg::XiphComment* xiph) {
if (s_bDebugMetadata) {
for (TagLib::Ogg::FieldListMap::ConstIterator it = xiph->fieldListMap().begin();
it != xiph->fieldListMap().end(); ++it) {
qDebug() << "XIPH" << TStringToQString((*it).first) << "-" << TStringToQString((*it).second.toString());
}
}
// Some tags use "BPM" so check for that.
if (xiph->fieldListMap().contains("BPM")) {
TagLib::StringList bpmString = xiph->fieldListMap()["BPM"];
QString sBpm = TStringToQString(bpmString.toString());
processBpmString("XIPH-BPM", sBpm);
}
// Give preference to the "TEMPO" tag which seems to be more standard
if (xiph->fieldListMap().contains("TEMPO")) {
TagLib::StringList bpmString = xiph->fieldListMap()["TEMPO"];
QString sBpm = TStringToQString(bpmString.toString());
processBpmString("XIPH-TEMPO", sBpm);
}
if (xiph->fieldListMap().contains("REPLAYGAIN_ALBUM_GAIN")) {
TagLib::StringList rgainString = xiph->fieldListMap()["REPLAYGAIN_ALBUM_GAIN"];
QString sReplayGain = TStringToQString(rgainString.toString());
parseReplayGainString(sReplayGain);
}
if (xiph->fieldListMap().contains("REPLAYGAIN_TRACK_GAIN")) {
TagLib::StringList rgainString = xiph->fieldListMap()["REPLAYGAIN_TRACK_GAIN"];
QString sReplayGain = TStringToQString(rgainString.toString());
parseReplayGainString(sReplayGain);
}
/*
* Reading key code information
* Unlike, ID3 tags, there's no standard or recommendation on how to store 'key' code
*
* Luckily, there are only a few tools for that, e.g., Rapid Evolution (RE).
* Assuming no distinction between start and end key, RE uses a "INITIALKEY"
* or a "KEY" vorbis comment.
*/
if (xiph->fieldListMap().contains("KEY")) {
TagLib::StringList keyStr = xiph->fieldListMap()["KEY"];
QString key = TStringToQString(keyStr.toString());
setKey(key);
}
if (getKey() == "" && xiph->fieldListMap().contains("INITIALKEY")) {
TagLib::StringList keyStr = xiph->fieldListMap()["INITIALKEY"];
QString key = TStringToQString(keyStr.toString());
setKey(key);
}
return true;
}
// Utility function to format tags so that they can be correctly parsed back
string formatString(const TagLib::StringList& strList) {
TagLib::String str = strList.toString(";");
if (str.isEmpty()) return "";
string result = str.to8Bit(true);
// heuristic to detect wrongly encoded tags (ie: twice latin-1 to utf-8, mostly)
// we should encode everything ourselves to utf-8, but sometimes it might happen
// that someone already did that, but told us the string was in latin-1.
// A way to detect that is if the string contains only latin-1 chars, when
// converting it to latin-1 it contains code chars, this probably means it was
// previously encoded in utf-8
if (isLatin1(str) &&
containsControlChars(str.to8Bit(false))) {
result = str.to8Bit(false);
}
// fix invalid utf-8 characters
result = fixInvalidUTF8(result);
return result;
}