itunesdiskbox.cpp

来自「Amarok是一款在LINUX或其他类UNIX操作系统中运行的音频播放器软件。 」· C++ 代码 · 共 94 行

/***************************************************************************
    copyright            : (C) 2002, 2003, 2006 by Jochen Issing
    email                : [e-mail]
 ***************************************************************************/

/***************************************************************************
 *   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                                                   *
 ***************************************************************************/

#include <iostream>
#include "itunesdiskbox.h"
#include "itunesdatabox.h"
#include "mp4isobox.h"
#include "mp4file.h"
#include "tfile.h"
#include "mp4tagsproxy.h"

using namespace TagLib;

class MP4::ITunesDiskBox::ITunesDiskBoxPrivate
{
public:
  ITunesDataBox* dataBox;
};

MP4::ITunesDiskBox::ITunesDiskBox( TagLib::File* file, MP4::Fourcc fourcc, uint size, long offset )
	:Mp4IsoBox(file, fourcc, size, offset)
{
  d = new MP4::ITunesDiskBox::ITunesDiskBoxPrivate();
  d->dataBox = 0;
}

MP4::ITunesDiskBox::~ITunesDiskBox()
{
  if( d->dataBox != 0 )
    delete d->dataBox;
  delete d;
}

//! parse the content of the box
void MP4::ITunesDiskBox::parse()
{
  TagLib::MP4::File* mp4file = static_cast<MP4::File*>( file() );

  // parse data box
  TagLib::uint size;
  MP4::Fourcc  fourcc;

  if(mp4file->readSizeAndType( size, fourcc ) == true)
  {
    // check for type - must be 'data'
    if( fourcc != MP4::Fourcc("data") )
    {
      std::cerr << "bad atom in itunes tag - skipping it." << std::endl;
      // jump over data tag
      mp4file->seek( size-8, TagLib::File::Current );
      return;
    }
    d->dataBox = new ITunesDataBox( mp4file, fourcc, size, mp4file->tell() );
    d->dataBox->parsebox();
  }
  else
  {
    // reading unsuccessful - serious error!
    std::cerr << "Error in parsing ITunesDiskBox - serious Error in taglib!" << std::endl;
    return;
  }
  // register data box
  mp4file->tagProxy()->registerBox( Mp4TagsProxy::disk, d->dataBox );

#if 0
  // get data pointer - just for debugging...
  TagLib::ByteVector trknData = d->dataBox->data();
  TagLib::String trknumber = TagLib::String::number( static_cast<int>( static_cast<unsigned char>(trknData[0]) << 24 |
	                                                               static_cast<unsigned char>(trknData[1]) << 16 |
								       static_cast<unsigned char>(trknData[2]) <<  8 |
								       static_cast<unsigned char>(trknData[3]) ) );
  std::cout << "Content of tracknumber box: " << trknumber << std::endl;
#endif
}