C++ ByteVector::data方法代码示例

Tag::Tag(const QString &filename)
    : m_filename(filename)
{
    TagLib::MPEG::File mpegfile(filename.toLocal8Bit().constData());
    TagLib::ID3v2::Tag* id3v2 = mpegfile.ID3v2Tag();
    if (id3v2 && !id3v2->isEmpty()) {
        readRegularTag(id3v2, m_data);

        int picnum = 0;

        TagLib::ID3v2::FrameList frames = id3v2->frameListMap()["APIC"]; // attached picture
        TagLib::ID3v2::FrameList::ConstIterator it = frames.begin();
        while (it != frames.end()) {
            TagLib::ID3v2::AttachedPictureFrame* apic = static_cast<TagLib::ID3v2::AttachedPictureFrame*>(*it);
            TagLib::ByteVector bytes = apic->picture();
            QImage img = QImage::fromData(reinterpret_cast<const uchar*>(bytes.data()), bytes.size());
            if (!img.isNull()) {
                m_data[QLatin1String("picture") + QString::number(picnum++)] = QVariant(img);
            }
            ++it;
        }

    } else {
        TagLib::FileRef fileref(filename.toLocal8Bit().constData());
        if (fileref.isNull())
            return;
        TagLib::Tag* tag = fileref.tag();
        if (!tag || tag->isEmpty())
            return;

        readRegularTag(tag, m_data);
    }
}

bool writeFileFromVector(const char *path, const TagLib::ByteVector &v) {
  std::ofstream o(path, std::ofstream::binary);
  if (!o) {
    return false;
  }
  o.write(v.data(), v.size());
  return true;
}

/*
** Write cover data to file.
**
*/
bool CCover::WriteCover(const TagLib::ByteVector& data, const std::wstring& target)
{
	bool written = false;

	FILE* f = _wfopen(target.c_str(), L"wb");
	if (f)
	{
		written = (fwrite(data.data(), 1, data.size(), f) == data.size());
		fclose(f);
	}

	return written;
}

QString extractMBIDFromFile(TagLib::MPEG::File *file)
{
	TagLib::ID3v2::Tag *tag = file->ID3v2Tag();
	TagLib::ID3v2::FrameList ufid = tag->frameListMap()["UFID"];
	if (!ufid.isEmpty()) {
		for (TagLib::ID3v2::FrameList::Iterator i = ufid.begin(); i != ufid.end(); i++) {
			TagLib::ID3v2::UniqueFileIdentifierFrame *frame = dynamic_cast<TagLib::ID3v2::UniqueFileIdentifierFrame *>(*i);
			if (frame && frame->owner() == "http://musicbrainz.org") {
				TagLib::ByteVector id = frame->identifier();
				return QString::fromAscii(id.data(), id.size());
			}
		}
	}
	return QString();
}

bool CoverUtils::coverFromXiphComment(TagLib::Ogg::XiphComment *xiphComment, Album *album) {

    if (!xiphComment) return false;

    const TagLib::StringList &stringList = xiphComment->fieldListMap()["COVERART"];
    if (stringList.isEmpty()) return false;
    TagLib::ByteVector byteVector = stringList.front().data(TagLib::String::Latin1);

    QByteArray encodedData;
    encodedData.setRawData(byteVector.data(), byteVector.size());

    QByteArray data = QByteArray::fromBase64(encodedData);

    QImage image;
    image.loadFromData(data);
    if (!isAcceptableImage(image)) return false;

    qDebug() << "Cover from Xiph!";

    return saveImage(image, album);
}

TagLib::ByteVector TagLib::EncodeBase64(const TagLib::ByteVector& input)
{
    ByteVector result;

    CFErrorRef error;
    SFB::SecTransform encoder = SecEncodeTransformCreate(kSecBase64Encoding, &error);
    if(nullptr == encoder) {
        LOGGER_WARNING("org.sbooth.AudioEngine", "SecEncodeTransformCreate failed: " << error);
        return TagLib::ByteVector::null;
    }

    SFB::CFData sourceData = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, (const UInt8 *)input.data(), (CFIndex)input.size(), kCFAllocatorNull);
    if(!sourceData)
        return TagLib::ByteVector::null;

    if(!SecTransformSetAttribute(encoder, kSecTransformInputAttributeName, sourceData, &error)) {
        LOGGER_WARNING("org.sbooth.AudioEngine", "SecTransformSetAttribute failed: " << error);
        return TagLib::ByteVector::null;
    }

    SFB::CFData encodedData = (CFDataRef)SecTransformExecute(encoder, &error);
    if(!encodedData) {
        LOGGER_WARNING("org.sbooth.AudioEngine", "SecTransformExecute failed: " << error);
        return TagLib::ByteVector::null;
    }

    result.setData((const char *)CFDataGetBytePtr((CFDataRef)encodedData), (TagLib::uint)CFDataGetLength((CFDataRef)encodedData));

    return result;
}

void MediaScannerThread::run()
{
	if (multiPass)
	{
		qDebug() << "MediaScannerThread: multi non-single pass selected";
		multiPass = false;
		for (int i=0;i<multiPassFileNames.count();i++)
		{
			QString fullPath = multiPassFileNames.at(i);
			TagLib::FileRef testfile(fullPath.toStdString().c_str());
			if (!testfile.isNull())
			{
				ID3Tag *tmpTag = 0;
				if (!tmpTag)
				{
					tmpTag = new ID3Tag();
					tmpTag->valid = false;
				}
				if (TagLib::MPEG::File *file = dynamic_cast<TagLib::MPEG::File *>( testfile.file()))
				{
					if (file->ID3v2Tag(false))
					{
						//Check to see if there are images in the tag
						#ifdef Q_OS_WIN32 //Currently this only works in the windows version of taglib??
						if (!file->ID3v2Tag()->frameListMap()["APIC"].isEmpty())
						{
							TagLib::ID3v2::FrameList frameList = file->ID3v2Tag()->frameListMap()["APIC"];
							TagLib::ID3v2::FrameList::Iterator iter;
							for( iter = frameList.begin(); iter != frameList.end(); ++iter )
							{
								TagLib::ID3v2::AttachedPictureFrame::Type t = (((TagLib::ID3v2::AttachedPictureFrame*)*iter))->type();
								if (t == TagLib::ID3v2::AttachedPictureFrame::Type::FrontCover)
								{
									TagLib::ByteVector pic = (((TagLib::ID3v2::AttachedPictureFrame*)*iter))->picture();
									QImage tmpPicture;
									tmpPicture.loadFromData((uchar*)pic.data(),pic.size());
									tmpTag->frontcover = tmpPicture;
								}
								else if (t == TagLib::ID3v2::AttachedPictureFrame::Type::BackCover)
								{
									TagLib::ByteVector pic = (((TagLib::ID3v2::AttachedPictureFrame*)*iter))->picture();
									QImage tmpPicture;
									tmpPicture.loadFromData((uchar*)pic.data(),pic.size());
									tmpTag->backcover = tmpPicture;
								}
								
							}
						}
						#endif //Q_OS_WIN32
						TagLib::Tag *tag = testfile.tag();
						if (!tmpTag->valid)
						{
							tmpTag->artist = tag->artist().toCString();
							tmpTag->title = tag->title().toCString();
							tmpTag->filename = fullPath;
							emit tagReceived("",0,tmpTag);
						}	
					}

				}
				else
				{
					TagLib::Tag *tag = testfile.tag();
					if (!tmpTag->valid)
					{
						tmpTag->artist = tag->artist().toCString();
						tmpTag->title = tag->title().toCString();
						tmpTag->filename = fullPath;
						emit tagReceived("",0,tmpTag);
					}
				}
			}
			else
			{
				qDebug() << "MediaScannerThread: Invalid File in multipass" << fullPath;
				int stop = 1;
			}
			QThread::msleep(50);
		}
		multiPassFileNames.clear();
		
	}
	else if (singlePass)
	{
		qDebug() << "MediaScannerThread: Non-multi single pass selected";
		singlePass = false;
		QString fullPath = singlePassFileName;
		TagLib::FileRef testfile(fullPath.toStdString().c_str());
		if (!testfile.isNull())
		{
			TagLib::Tag *tag = testfile.tag();
		//if (tag)
		//{
			ID3Tag *tmpTag = 0;
			if (!tmpTag)
			{
				tmpTag = new ID3Tag();
				tmpTag->valid = false;
			}
			if (!tmpTag->valid)
//.........这里部分代码省略.........

TagLib::ByteVector TagLib::DecodeBase64(const TagLib::ByteVector& input)
{
#if USE_SECURITY_FRAMEWORK
	ByteVector result;

	CFErrorRef error;
	SecTransformRef decoder = SecDecodeTransformCreate(kSecBase64Encoding, &error);
    if(nullptr == decoder) {
		CFShow(error); 
		return TagLib::ByteVector::null;
	}

	CFDataRef sourceData = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, (const UInt8 *)input.data(), input.size(), kCFAllocatorNull);
	if(nullptr == sourceData) {
		CFRelease(decoder), decoder = nullptr;

		return TagLib::ByteVector::null;
	}

    if(!SecTransformSetAttribute(decoder, kSecTransformInputAttributeName, sourceData, &error)) {
		CFShow(error); 

		CFRelease(sourceData), sourceData = nullptr;
		CFRelease(decoder), decoder = nullptr;

		return TagLib::ByteVector::null;
	}

	CFTypeRef decodedData = SecTransformExecute(decoder, &error);
	if(nullptr == decodedData) {
		CFShow(error); 

		CFRelease(sourceData), sourceData = nullptr;
		CFRelease(decoder), decoder = nullptr;

		return TagLib::ByteVector::null;
	}

	result.setData((const char *)CFDataGetBytePtr((CFDataRef)decodedData), (TagLib::uint)CFDataGetLength((CFDataRef)decodedData));

	CFRelease(decodedData), decodedData = nullptr;
	CFRelease(sourceData), sourceData = nullptr;
	CFRelease(decoder), decoder = nullptr;
	
	return result;
#else
	ByteVector result;

	BIO *b64 = BIO_new(BIO_f_base64());
	BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);

	BIO *bio = BIO_new_mem_buf(reinterpret_cast<void *>(const_cast<char *>(input.data())), input.size());
	bio = BIO_push(b64, bio);

	char inbuf [512];
	int inlen;
	while(0 < (inlen = BIO_read(bio, inbuf, 512)))
		result.append(ByteVector(inbuf, inlen));

	BIO_free_all(bio);
	
	return result;
#endif
}

TagLib::ByteVector TagLib::EncodeBase64(const TagLib::ByteVector& input)
{
#if USE_SECURITY_FRAMEWORK
	ByteVector result;

	CFErrorRef error;
	SecTransformRef encoder = SecEncodeTransformCreate(kSecBase64Encoding, &error);
    if(nullptr == encoder) {
		CFShow(error); 
		return TagLib::ByteVector::null;
	}

	CFDataRef sourceData = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, (const UInt8 *)input.data(), input.size(), kCFAllocatorNull);
	if(nullptr == sourceData) {
		CFRelease(encoder), encoder = nullptr;
		
		return TagLib::ByteVector::null;
	}

    if(!SecTransformSetAttribute(encoder, kSecTransformInputAttributeName, sourceData, &error)) {
		CFShow(error); 
		
		CFRelease(sourceData), sourceData = nullptr;
		CFRelease(encoder), encoder = nullptr;
		
		return TagLib::ByteVector::null;
	}

	CFTypeRef encodedData = SecTransformExecute(encoder, &error);
	if(nullptr == encodedData) {
		CFShow(error); 
		
		CFRelease(sourceData), sourceData = nullptr;
		CFRelease(encoder), encoder = nullptr;
		
		return TagLib::ByteVector::null;
	}

	result.setData((const char *)CFDataGetBytePtr((CFDataRef)encodedData), (TagLib::uint)CFDataGetLength((CFDataRef)encodedData));

	CFRelease(encodedData), encodedData = nullptr;
	CFRelease(sourceData), sourceData = nullptr;
	CFRelease(encoder), encoder = nullptr;

	return result;
#else
	ByteVector result;

	BIO *b64 = BIO_new(BIO_f_base64());
	BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);

	BIO *bio = BIO_new(BIO_s_mem());
	bio = BIO_push(b64, bio);
	BIO_write(bio, input.data(), input.size());
	(void)BIO_flush(bio);

	void *mem = nullptr;
	long size = BIO_get_mem_data(bio, &mem);
	if(0 < size)
		result.setData(static_cast<const char *>(mem), static_cast<uint>(size));

	BIO_free_all(bio);

	return result;
#endif
}

static Meta::ReplayGainTagMap readID3v2Tags( TagLib::ID3v2::Tag *tag )
{
    Meta::ReplayGainTagMap map;
    {   // ID3v2.4.0 native replay gain tag support (as written by Quod Libet, for example).
        TagLib::ID3v2::FrameList frames = tag->frameListMap()["RVA2"];
        frames.append(tag->frameListMap()["XRVA"]);
        if ( !frames.isEmpty() )
        {
            for ( unsigned int i = 0; i < frames.size(); ++i )
            {
                // we have to parse this frame ourselves
                // ID3v2 frame header is 10 bytes, so skip that
                TagLib::ByteVector data = frames[i]->render().mid( 10 );
                unsigned int offset = 0;
                QString desc( data.data() );
                offset += desc.count() + 1;
                unsigned int channel = data.mid( offset, 1 ).toUInt( true );
                // channel 1 is the main volume - the only one we care about
                if ( channel == 1 )
                {
                    ++offset;
                    qint16 adjustment512 = data.mid( offset, 2 ).toShort( true );
                    qreal adjustment = ( (qreal)adjustment512 ) / 512.0;
                    offset += 2;
                    unsigned int peakBits = data.mid( offset, 1 ).toUInt( true );
                    ++offset;
                    bool ok = false;
                    qreal peak = readRVA2PeakValue( data.mid( offset ), peakBits, &ok );
                    if ( ok )
                    {
                        if ( desc.toLower() == "album" )
                        {
                            map[Meta::ReplayGain_Album_Gain] = adjustment;
                            map[Meta::ReplayGain_Album_Peak] = peakToDecibels( peak );
                        }
                        else if ( desc.toLower() == "track" || !map.contains( Meta::ReplayGain_Track_Gain ) )
                        {
                            map[Meta::ReplayGain_Track_Gain] = adjustment;
                            map[Meta::ReplayGain_Track_Peak] = peakToDecibels( peak );
                        }
                    }
                }
            }
            if ( !map.isEmpty() )
                return map;
        }
    }

    {   // Foobar2000-style ID3v2.3.0 tags
        TagLib::ID3v2::FrameList frames = tag->frameListMap()["TXXX"];
        for ( TagLib::ID3v2::FrameList::Iterator it = frames.begin(); it != frames.end(); ++it ) {
            TagLib::ID3v2::UserTextIdentificationFrame* frame =
                dynamic_cast<TagLib::ID3v2::UserTextIdentificationFrame*>( *it );
            if ( frame && frame->fieldList().size() >= 2 )
            {
                QString desc = TStringToQString( frame->description() ).toLower();
                if ( desc == "replaygain_album_gain" )
                    maybeAddGain( frame->fieldList()[1], Meta::ReplayGain_Album_Gain, &map );
                if ( desc == "replaygain_album_peak" )
                    maybeAddPeak( frame->fieldList()[1], Meta::ReplayGain_Album_Peak, &map );
                if ( desc == "replaygain_track_gain" )
                    maybeAddGain( frame->fieldList()[1], Meta::ReplayGain_Track_Gain, &map );
                if ( desc == "replaygain_track_peak" )
                    maybeAddPeak( frame->fieldList()[1], Meta::ReplayGain_Track_Peak, &map );
            }
        }
    }
    return map;
}

TagLib::ByteVector TagLib::DecodeBase64(const TagLib::ByteVector& input)
{
	SFB::CFError error;
	SFB::SecTransform decoder(SecDecodeTransformCreate(kSecBase64Encoding, &error));
    if(!decoder) {
		LOGGER_WARNING("org.sbooth.AudioEngine", "SecDecodeTransformCreate failed: " << error);
		return {};
	}

	SFB::CFData sourceData(CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, (const UInt8 *)input.data(), (CFIndex)input.size(), kCFAllocatorNull));
	if(!sourceData)
		return {};

    if(!SecTransformSetAttribute(decoder, kSecTransformInputAttributeName, sourceData, &error)) {
		LOGGER_WARNING("org.sbooth.AudioEngine", "SecTransformSetAttribute failed: " << error);
		return {};
	}

	SFB::CFData decodedData((CFDataRef)SecTransformExecute(decoder, &error));
	if(!decodedData)
		return {};

	return {(const char *)CFDataGetBytePtr((CFDataRef)decodedData), (size_t)CFDataGetLength((CFDataRef)decodedData)};
}

void DSFHeader::parse(const TagLib::ByteVector &data)
{
  if (data.size() < DSD_HEADER_SIZE + FMT_HEADER_SIZE) {
    std::cerr <<"DSFHeader::parse(): header size incorrect" << std::endl;
    return;
  }

  const char *hdr = data.data();
  size_t offset = 0;

  //
  // ******** DSD chunk header ********
  // DSD header chunk should start with "DSD ".
  //
  if (hdr[0] != 'D' || hdr[1] != 'S' || hdr[2] != 'D' || hdr[3] != ' ') 
  {
    std::cerr <<"DSD::Header::parse(): DSD header's first 4 bytes != 'DSD '" << std::endl;
    return;
  }
  offset += 4;
  
  // The next 8 bytes contain the size of DSD header
  // (numerical data is stored in little endian)
  if (data.toLongLong(offset, false) != DSD_HEADER_SIZE)
  {
    std::cerr <<"DSD::Header::parse(): DSD header size is incorrect" << std::endl;
    return;
  }
  offset += LONG_INT_SIZE;

  // The next 8 bytes contains the file size
  d->fileSize = bytesToUInt64(&hdr[0], offset);
  offset += LONG_INT_SIZE;

  // The next 8 bytes contains the offset to id3v2 tag (0 if not exists)
  d->ID3v2Offset = bytesToUInt64(&hdr[0], offset);
  offset += LONG_INT_SIZE;

  // 
  // ********* FMT chunk ********
  //
  // FMT header chunk should start with "fmt ".
  //
  if (hdr[offset] != 'f' || hdr[offset + 1] != 'm' || 
      hdr[offset + 2] != 't' || hdr[offset + 3] != ' ') 
  {
    std::cerr <<"DSD::Header::parse(): FMT header's first 4 bytes != 'fmt '" << std::endl;
    return;
  }
  offset += 4;

  // The next 8 bytes contain the size of FMT header, which should be 52
  if (data.toLongLong(offset, false) != FMT_HEADER_SIZE)
  {
    std::cerr <<"DSD::Header::parse(): FMT header size is incorrect" << std::endl;
    return;
  }
  offset += LONG_INT_SIZE;

  // Format version
  // There's only version 1 for now...
  unsigned int ver = data.toUInt(offset, false);
  if (ver != 1) {
    std::cerr <<"DSD::Header::parse(): format version != 1" << std::endl;
    return;
  }
  d->version = static_cast<Version>(ver);
  offset += INT_SIZE;

  // Format ID
  if (data.toUInt(offset, false) != 0) {
    std::cerr <<"DSD::Header::parse(): format ID != 0" << std::endl;
    return;
  }
  offset += INT_SIZE;

  // Channel Type
  unsigned int ct = data.toUInt(offset, false);
  if (ct < 1 || ct > 7) {
    std::cerr <<"DSD::Header::parse(): channel type out of range" << std::endl;
    return;
  }
  d->channelType = static_cast<ChannelType>(ct);
  offset += INT_SIZE;

  // Channel Num
  d->channelNum = data.toUInt(offset, false);
  if (d->channelNum < MinType || d->channelNum > MaxType) {
    std::cerr <<"DSD::Header::parse(): channel num out of range" << std::endl;
    return;
  }
  offset += INT_SIZE;

  // Sampling frequency
  d->sampleRate = data.toUInt(offset, false);
  if (d->sampleRate != 2822400 && d->sampleRate != 5644800) {
    std::cerr <<"DSD::Header::parse(): invalid sampling frequency" << std::endl;
    return;
  }
  offset += INT_SIZE;
//.........这里部分代码省略.........