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// -*- C++ -*-
// $Id: header.h,v 1.3 2002/07/31 13:20:49 t1mpy Exp $
// id3lib: a C++ library for creating and manipulating id3v1/v2 tags
// Copyright 1999, 2000 Scott Thomas Haug
// Copyright 2002 Thijmen Klok (thijmen@id3lib.org)
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Library General Public License as published by
// the Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.
//
// 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 Library General Public
// License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with this library; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// The id3lib authors encourage improvements and optimisations to be sent to
// the id3lib coordinator. Please see the README file for details on where to
// send such submissions. See the AUTHORS file for a list of people who have
// contributed to id3lib. See the ChangeLog file for a list of changes to
// id3lib. These files are distributed with id3lib at
// http://download.sourceforge.net/id3lib/
#ifndef _ID3LIB_HEADER_H_
#define _ID3LIB_HEADER_H_
#include "id3/globals.h" //has <stdlib.h> "id3/sized_types.h"
#include "flags.h"
class ID3_Reader;
class ID3_Writer;
class ID3_Header
{
public:
struct Info
{
uchar frame_bytes_id;
uchar frame_bytes_size;
uchar frame_bytes_flags;
bool is_extended;
size_t extended_bytes; //including the extended header, so everything!
bool is_experimental;
};
ID3_Header()
: _spec (ID3V2_UNKNOWN),
_data_size (0),
_changed (false)
{
this->Clear();
_changed = false;
}
virtual ~ID3_Header() { ; }
virtual bool SetSpec(ID3_V2Spec);
/* */ ID3_V2Spec GetSpec() const { return _spec; }
/* */ bool SetDataSize(size_t size)
{
bool changed = size != _data_size;
_changed = _changed || changed;
_data_size = size;
return changed;
}
/* */ size_t GetDataSize() const { return _data_size; }
virtual bool Clear()
{
bool changed = this->SetDataSize(0);
if (this->GetSpec() == ID3V2_UNKNOWN)
{
this->SetSpec(ID3V2_LATEST);
changed = true;
}
changed = _flags.clear() || changed;
_changed = changed || _changed;
return changed;
}
virtual size_t Size() const = 0;
virtual void Render(ID3_Writer&) const = 0;
virtual bool Parse(ID3_Reader&) = 0;
ID3_Header &operator=( const ID3_Header &rhs)
{
if (this != &rhs)
{
this->SetSpec(rhs.GetSpec());
this->SetDataSize(rhs.GetSpec());
this->_flags = rhs._flags;
}
return *this;
}
protected:
ID3_V2Spec _spec; // which version of the spec
size_t _data_size; // how big is the data?
ID3_Flags _flags; // header flags
Info* _info; // header info w.r.t. id3v2 spec
bool _changed; // has the header changed since parsing
}
;
#endif /* _ID3LIB_HEADER_H */
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