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Rebuild TRDC from v2.3 fields

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This fixes an issue that was reported to me via email with the recording
date being thrown away from v2.3 tags.
This commit is contained in:
Scott Wheeler 2014-09-25 22:19:09 +02:00
parent 71c1ce375f
commit bd7419f0bd
4 changed files with 34 additions and 2 deletions
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22
taglib/mpeg/id3v2/id3v2framefactory.cpp
View File

@ -290,6 +290,28 @@ Frame *FrameFactory::createFrame(const ByteVector &origData, Header *tagHeader)
return new UnknownFrame(data, header);
}
void FrameFactory::rebuildAggregateFrames(Tag *tag) const
{
if(tag->header()->majorVersion() < 4 &&
tag->frameList("TDRC").size() == 1 &&
tag->frameList("TDAT").size() == 1)
{
TextIdentificationFrame *trdc =
static_cast<TextIdentificationFrame *>(tag->frameList("TDRC").front());
UnknownFrame *tdat =
static_cast<UnknownFrame *>(tag->frameList("TDAT").front());
if(trdc->fieldList().size() == 1 &&
trdc->fieldList().front().size() == 4 &&
tdat->data().size() >= 5)
{
String date(tdat->data().mid(1), String::Type(tdat->data()[0]));
if(date.length() == 4)
trdc->setText(trdc->toString() + '-' + date.substr(2, 2) + '-' + date.substr(0, 2));
}
}
}
String::Type FrameFactory::defaultTextEncoding() const
{
return d->defaultEncoding;

8
taglib/mpeg/id3v2/id3v2framefactory.h
View File

@ -93,6 +93,14 @@ namespace TagLib {
// BIC: make virtual
Frame *createFrame(const ByteVector &data, Header *tagHeader) const;
/*!
* After a tag has been read, this tries to rebuild some of them
* information, most notably the recording date, from frames that
* have been deprecated and can't be upgraded directly.
*/
// BIC: Make virtual
void rebuildAggregateFrames(Tag *tag) const;
/*!
* Returns the default text encoding for text frames. If setTextEncoding()
* has not been explicitly called this will only be used for new text

4
taglib/mpeg/id3v2/id3v2tag.cpp
View File

@ -693,7 +693,7 @@ void ID3v2::Tag::parse(const ByteVector &origData)
}
d->paddingSize = frameDataLength - frameDataPosition;
return;
break;
}
Frame *frame = d->factory->createFrame(data.mid(frameDataPosition),
@ -712,6 +712,8 @@ void ID3v2::Tag::parse(const ByteVector &origData)
frameDataPosition += frame->size() + Frame::headerSize(d->header.majorVersion());
addFrame(frame);
}
d->factory->rebuildAggregateFrames(this);
}
void ID3v2::Tag::setTextFrame(const ByteVector &id, const String &value)

2
tests/test_id3v2.cpp
View File

@ -687,7 +687,7 @@ public:
tf = static_cast<ID3v2::TextIdentificationFrame *>(bar.ID3v2Tag()->frameList("TDRC").front());
CPPUNIT_ASSERT(tf);
CPPUNIT_ASSERT_EQUAL(TagLib::uint(1), tf->fieldList().size());
CPPUNIT_ASSERT_EQUAL(String("2012"), tf->fieldList().front());
CPPUNIT_ASSERT_EQUAL(String("2012-04-17"), tf->fieldList().front());
tf = dynamic_cast<ID3v2::TextIdentificationFrame *>(bar.ID3v2Tag()->frameList("TIPL").front());
CPPUNIT_ASSERT(tf);
CPPUNIT_ASSERT_EQUAL(TagLib::uint(8), tf->fieldList().size());