src/add-ons/media/plugins/matroska/libebml/ebml/EbmlStream.h

   1 /****************************************************************************
   2 ** libebml : parse EBML files, see http://embl.sourceforge.net/
   3 **
   4 ** <file/class description>
   5 **
   6 ** Copyright (C) 2002-2004 Steve Lhomme.  All rights reserved.
   7 **
   8 ** This file is part of libebml.
   9 **
  10 ** This library is free software; you can redistribute it and/or
  11 ** modify it under the terms of the GNU Lesser General Public
  12 ** License as published by the Free Software Foundation; either
  13 ** version 2.1 of the License, or (at your option) any later version.
  14 **
  15 ** This library is distributed in the hope that it will be useful,
  16 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 ** Lesser General Public License for more details.
  19 **
  20 ** You should have received a copy of the GNU Lesser General Public
  21 ** License along with this library; if not, write to the Free Software
  22 ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23 **
  24 ** See http://www.matroska.org/license/lgpl/ for LGPL licensing information.
  25 **
  26 ** Contact license@matroska.org if any conditions of this licensing are
  27 ** not clear to you.
  28 **
  29 **********************************************************************/
  30
  31 /*!
  32         \file
  33         \version \$Id: EbmlStream.h 639 2004-07-09 20:59:14Z mosu $
  34         \author Steve Lhomme     <robux4 @ users.sf.net>
  35 */
  36 #ifndef LIBEBML_STREAM_H
  37 #define LIBEBML_STREAM_H
  38
  39 #include "EbmlTypes.h"
  40 #include "IOCallback.h"
  41 #include "EbmlElement.h"
  42
  43 START_LIBEBML_NAMESPACE
  44
  45 /*!
  46     \class EbmlStream
  47     \brief Handle an input/output stream of EBML elements
  48 */
  49 class EBML_DLL_API EbmlStream {
  50         public:
  51                 EbmlStream(IOCallback & output);
  52                 ~EbmlStream();
  53
  54                 /*!
  55                         \brief Find a possible next ID in the data stream
  56                         \param MaxDataSize The maximum possible of the data in the element (for sanity checks)
  57                         \note the user will have to delete that element later
  58                 */
  59                 EbmlElement * FindNextID(const EbmlCallbacks & ClassInfos, const uint64 MaxDataSize);
  60
  61                 EbmlElement * FindNextElement(const EbmlSemanticContext & Context, int & UpperLevel, const uint64 MaxDataSize, bool AllowDummyElt, unsigned int MaxLowerLevel = 1);
  62
  63                 inline IOCallback & I_O() {return Stream;}
  64
  65         protected:
  66                 IOCallback & Stream;
  67 };
  68
  69 END_LIBEBML_NAMESPACE
  70
  71 #endif // LIBEBML_STREAM_H