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/***************************************************************************
copyright : (C) 2002 - 2008 by Scott Wheeler
email : wheeler@kde.org
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
* 02110-1301 USA *
* *
* Alternatively, this file is available under the Mozilla Public *
* License Version 1.1. You may obtain a copy of the License at *
* http://www.mozilla.org/MPL/ *
***************************************************************************/
#ifndef TAGLIB_INFOTAG_H
#define TAGLIB_INFOTAG_H
#include "tag.h"
#include "tmap.h"
#include "tstring.h"
#include "tstringlist.h"
#include "tbytevector.h"
#include "taglib_export.h"
namespace TagLib {
class File;
//! A RIFF Info tag implementation.
namespace RIFF {
namespace Info {
typedef Map<ByteVector, String> FieldListMap;
//! A abstraction for the string to data encoding in Info tags.
/*!
* RIFF Info tag has no clear definitions about character encodings.
* In practice, local encoding of each system is largely used and UTF-8 is
* popular too.
*
* Here is an option to read and write tags in your preferrd encoding
* by subclassing this class, reimplementing parse() and render() and setting
* your reimplementation as the default with Info::Tag::setStringHandler().
*
* \see ID3v1::Tag::setStringHandler()
*/
class TAGLIB_EXPORT StringHandler
{
public:
StringHandler();
~StringHandler();
/*!
* Decode a string from \a data. The default implementation assumes that
* \a data is an UTF-8 character array.
*/
virtual String parse(const ByteVector &data) const;
/*!
* Encode a ByteVector with the data from \a s. The default implementation
* assumes that \a s is an UTF-8 string.
*/
virtual ByteVector render(const String &s) const;
};
//! The main class in the ID3v2 implementation
/*!
* This is the main class in the INFO tag implementation. RIFF INFO tag is a
* metadata format found in WAV audio and AVI video files. Though it is a part
* of Microsoft/IBM's RIFF specification, the author could not find the official
* documents about it. So, this implementation is refering to unofficial documents
* online and some applications' behaviors especially Windows Explorer.
*/
class TAGLIB_EXPORT Tag : public TagLib::Tag
{
public:
/*!
* Constructs an empty Info tag.
*/
Tag();
/*!
* Constructs an Info tag read from \a data which is contents of "LIST" chunk.
*/
Tag(const ByteVector &data);
virtual ~Tag();
// Reimplementations
virtual String title() const;
virtual String artist() const;
virtual String album() const;
virtual String comment() const;
virtual String genre() const;
virtual uint year() const;
virtual uint track() const;
virtual void setTitle(const String &s);
virtual void setArtist(const String &s);
virtual void setAlbum(const String &s);
virtual void setComment(const String &s);
virtual void setGenre(const String &s);
virtual void setYear(uint i);
virtual void setTrack(uint i);
virtual bool isEmpty() const;
/*
* Gets the value of the field with the ID \a id.
*/
String fieldText(const ByteVector &id) const;
/*
* Sets the value of the field with the ID \a id to \a s.
* If the field does not exist, it is created.
* If \s is empty, the field is removed.
*
* \note fieldId must be four-byte long pure ascii string. This function
* performs nothing if fieldId is invalid.
*/
void setFieldText(const ByteVector &id, const String &s);
/*
* Removes the field with the ID \a id.
*/
void removeField(const ByteVector &id);
/*!
* Render the tag back to binary data, suitable to be written to disk.
*
* \note Returns empty ByteVector is the tag contains no fields.
*/
ByteVector render() const;
/*!
* Sets the string handler that decides how the text data will be
* converted to and from binary data.
* If the parameter \a handler is null, the previous handler is
* released and default UTF-8 handler is restored.
*
* \note The caller is responsible for deleting the previous handler
* as needed after it is released.
*
* \see StringHandler
*/
static void setStringHandler(const StringHandler *handler);
protected:
/*!
* Pareses the body of the tag in \a data.
*/
void parse(const ByteVector &data);
private:
Tag(const Tag &);
Tag &operator=(const Tag &);
class TagPrivate;
TagPrivate *d;
};
}}
}
#endif