text: /***************************************************************************
      copyright            : (C) 2012 by Lukáš Lalinský
      email                : lalinsky@gmail.com
  
      copyright            : (C) 2002 - 2008 by Scott Wheeler
      email                : wheeler@kde.org
                             (original Vorbis implementation)
   ***************************************************************************/
  
  /***************************************************************************
   *   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/                                           *
   ***************************************************************************/
  
  #include <bitset>
  
  #include <tstring.h>
  #include <tdebug.h>
  #include <tpropertymap.h>
  
  #include "opusfile.h"
  
  using namespace TagLib;
  using namespace TagLib::Ogg;
  
  class Opus::File::FilePrivate
  {
  public:
    FilePrivate() :
      comment(0),
      properties(0) {}
  
    ~FilePrivate()
    {
      delete comment;
      delete properties;
    }
  
    Ogg::XiphComment *comment;
    Properties *properties;
  };
  
  ////////////////////////////////////////////////////////////////////////////////
  // public members
  ////////////////////////////////////////////////////////////////////////////////
  
  Opus::File::File(FileName file, bool readProperties, Properties::ReadStyle propertiesStyle) :
    Ogg::File(file),
    d(new FilePrivate())
  {
    if(isOpen())
      read(readProperties, propertiesStyle);
  }
  
  Opus::File::File(IOStream *stream, bool readProperties, Properties::ReadStyle propertiesStyle) :
    Ogg::File(stream),
    d(new FilePrivate())
  {
    if(isOpen())
      read(readProperties, propertiesStyle);
  }
  
  Opus::File::~File()
  {
    delete d;
  }
  
  Ogg::XiphComment *Opus::File::tag() const
  {
    return d->comment;
  }
  
  PropertyMap Opus::File::properties() const
  {
    return d->comment->properties();
  }
  
  PropertyMap Opus::File::setProperties(const PropertyMap &properties)
  {
    return d->comment->setProperties(properties);
  }
  
  Opus::Properties *Opus::File::audioProperties() const
  {
    return d->properties;
  }
  
  bool Opus::File::save()
  {
    if(!d->comment)
      d->comment = new Ogg::XiphComment;
  
    setPacket(1, ByteVector("OpusTags", 8) + d->comment->render(false));
  
    return Ogg::File::save();
  }
  
  ////////////////////////////////////////////////////////////////////////////////
  // private members
  ////////////////////////////////////////////////////////////////////////////////
  
  void Opus::File::read(bool readProperties, Properties::ReadStyle propertiesStyle)
  {
    ByteVector opusHeaderData = packet(0);
  
    if(!opusHeaderData.startsWith("OpusHead")) {
      setValid(false);
      debug("Opus::File::read() -- invalid Opus identification header");
      return;
    }
  
    ByteVector commentHeaderData = packet(1);
  
    if(!commentHeaderData.startsWith("OpusTags")) {
      setValid(false);
      debug("Opus::File::read() -- invalid Opus tags header");
      return;
    }
  
    d->comment = new Ogg::XiphComment(commentHeaderData.mid(8));
  
    if(readProperties)
      d->properties = new Properties(this, propertiesStyle);
  }
  