C++ File::isValid方法代码示例

void
MetaBundle::readTags( TagLib::AudioProperties::ReadStyle readStyle )
{
    if( m_url.protocol() != "file" )
        return;

    const QString path = m_url.path();
    TagLib::FileRef fileref;
    TagLib::Tag *tag = 0;

    if( AmarokConfig::recodeID3v1Tags() && path.endsWith( ".mp3", false ) )
    {
        TagLib::MPEG::File *mpeg = new TagLib::MPEG::File( QFile::encodeName( path ), true, readStyle );
        fileref = TagLib::FileRef( mpeg );

        if( mpeg->isValid() )
            // we prefer ID3v1 over ID3v2 if recoding tags because
            // apparently this is what people who ignore ID3 standards want
            tag = mpeg->ID3v1Tag() ? (TagLib::Tag*)mpeg->ID3v1Tag() : (TagLib::Tag*)mpeg->ID3v2Tag();
    }

    else {
        fileref = TagLib::FileRef( QFile::encodeName( path ), true, readStyle );

        if( !fileref.isNull() )
            tag = fileref.tag();
    }

    if( !fileref.isNull() ) {
        if ( tag ) {
            #define strip( x ) TStringToQString( x ).stripWhiteSpace()
            m_title   = strip( tag->title() );
            m_artist  = strip( tag->artist() );
            m_album   = strip( tag->album() );
            m_comment = strip( tag->comment() );
            m_genre   = strip( tag->genre() );
            m_year    = tag->year() ? QString::number( tag->year() ) : QString();
            m_track   = tag->track() ? QString::number( tag->track() ) : QString();
            #undef strip

            m_isValidMedia = true;
        }

        init( fileref.audioProperties() );
    }

    //FIXME disabled for beta4 as it's simpler to not got 100 bug reports
    //else if( KMimeType::findByUrl( m_url )->is( "audio" ) )
    //    init( KFileMetaInfo( m_url, QString::null, KFileMetaInfo::Everything ) );
}

bool CTagBase::addImage(wchar_t* s)
{
	if (!_tagFile) return false;
	TagLib::MPEG::File *pAudioFile = (TagLib::MPEG::File *)_tagFile.get();
	CString strFileName = s;
	ImageFile imageFile((CW2A)strFileName.GetBuffer());
	if (!pAudioFile->isValid() || !imageFile.isValid())
		return false;
	TagLib::ID3v2::Tag *tag = pAudioFile->ID3v2Tag(true);
	TagLib::ID3v2::AttachedPictureFrame *frame = new TagLib::ID3v2::AttachedPictureFrame;
	frame->setMimeType(imageFile.mimeType());
	frame->setPicture(imageFile.data());
	tag->addFrame(frame);
	return pAudioFile->save();

}

/* LOAD UP THE FILE'S TAG
 * Search each file type individually so we can get individual tags for
 * custom tagging.
 */
TagDatac * tag_data_load (char *url, int *pvalid)
{
    TagData * data;
    TagLib::String s = url;
    int mtime;
    struct stat buf;
    if (!stat (url, &buf))
        mtime = (int) buf.st_mtime;


   /* FIXME: Using filename to find media type. GStreamer probe instead?
   */
    if(s.size() > 4) {
        if(s.substr(s.size() - 4, 4).upper() == ".OGG")
        {
            TagLib::Vorbis::File * f = new TagLib::Vorbis::File(url);
            if (! f->isValid ())
                return NULL;
            data = (TagData*) malloc (sizeof (TagData));
            data->file = new TagLib::FileRef (f);
            data->id3v2 = NULL;
            data->id3v1 = NULL;
            data->ape   = NULL;
            data->xiph  = f->tag ();
            data->mime  = "application/ogg";
            data->mtime = mtime;
            return reinterpret_cast<TagDatac *> (data);
        }
        if(s.substr(s.size() - 4, 4).upper() == ".MP3")
        {
            TagLib::MPEG::File * f = new TagLib::MPEG::File(url);
            if (! f->isValid ())
                return NULL;
            data = (TagData*) malloc (sizeof (TagData));
            data->file = new TagLib::FileRef (f);
            data->id3v2 = f->ID3v2Tag ();
            data->id3v1 = f->ID3v1Tag ();
            data->ape   = f->APETag ();
            data->xiph  = NULL;
            data->mime  = "audio/mpeg";
            data->mtime = mtime;
            return reinterpret_cast<TagDatac *>(data);
        }
        if(s.substr(s.size() - 5, 5).upper() == ".FLAC")
        {
            TagLib::FLAC::File * f = new TagLib::FLAC::File(url);
            if ((! f->isValid ())&& (pvalid != NULL)){
				*pvalid = -1;//paul add on 080827 merge from Olive
                return NULL;
			}
            data = (TagData*) malloc (sizeof (TagData));
            data->file = new TagLib::FileRef (f);
            data->id3v2 = f->ID3v2Tag ();
            data->id3v1 = f->ID3v1Tag ();
            data->ape   = NULL;
            data->xiph  = f->xiphComment ();
            data->mime  = "audio/x-flac";
            data->mtime = mtime;
            return reinterpret_cast<TagDatac *>(data);
        }
        if(s.substr(s.size() - 4, 4).upper() == ".MPC" || s.substr(s.size() - 4, 4).upper() == ".AAC")
        {
            TagLib::MPC::File * f = new TagLib::MPC::File(url);
            if (! f->isValid ())
                return NULL;
            data = (TagData*) malloc (sizeof (TagData));
            data->file = new TagLib::FileRef (f);
            data->id3v2 = NULL;
            data->id3v1 = f->ID3v1Tag ();
            data->ape   = f->APETag ();
            data->xiph  = NULL;
            data->mime  = "audio/x-musepack";
            data->mtime = mtime;
            return reinterpret_cast<TagDatac *>(data);
        }
    }
    return NULL;
}