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

   1 /****************************************************************************
   2 ** libebml : parse EBML files, see http://embl.sourceforge.net/
   3 **
   4 ** <file/class description>
   5 **
   6 ** Copyright (C) 2002-2005 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: EbmlFloat.h 1079 2005-03-03 13:18:14Z robux4 $
  34         \author Steve Lhomme     <robux4 @ users.sf.net>
  35 */
  36 #ifndef LIBEBML_FLOAT_H
  37 #define LIBEBML_FLOAT_H
  38
  39 #include "EbmlTypes.h"
  40 #include "EbmlElement.h"
  41
  42 START_LIBEBML_NAMESPACE
  43
  44 /*!
  45     \class EbmlFloat
  46     \brief Handle all operations on a float EBML element
  47 */
  48 class EBML_DLL_API EbmlFloat : public EbmlElement {
  49         public:
  50                 enum Precision {
  51                          FLOAT_32
  52                         ,FLOAT_64
  53                 };
  54
  55                 EbmlFloat(const Precision prec = FLOAT_32);
  56                 EbmlFloat(const double DefaultValue, const Precision prec = FLOAT_32);
  57                 EbmlFloat(const EbmlFloat & ElementToClone);
  58
  59                 bool ValidateSize() const
  60                 {
  61                         return (Size == 4 || Size == 8);
  62                 }
  63
  64                 uint32 RenderData(IOCallback & output, bool bForceRender, bool bKeepIntact = false);
  65                 uint64 ReadData(IOCallback & input, ScopeMode ReadFully = SCOPE_ALL_DATA);
  66                 uint64 UpdateSize(bool bKeepIntact = false, bool bForceRender = false);
  67
  68                 void SetPrecision(const EbmlFloat::Precision prec = FLOAT_32)
  69                 {
  70                         if (prec == FLOAT_64)
  71                                 Size = 8;
  72                         else
  73                                 Size = 4; // default size
  74                 }
  75
  76
  77 //              EbmlFloat & operator=(const float NewValue) { Value = NewValue; return *this;}
  78                 EbmlFloat & operator=(const double NewValue) { Value = NewValue; bValueIsSet = true; return *this;}
  79
  80                 bool operator<(const EbmlFloat & EltCmp) const {return Value < EltCmp.Value;}
  81
  82                 operator const float() const {return float(Value);}
  83                 operator const double() const {return double(Value);}
  84
  85                 void SetDefaultValue(double aValue) {assert(!DefaultIsSet); DefaultValue = aValue; DefaultIsSet = true;}
  86
  87                 const double DefaultVal() const {assert(DefaultIsSet); return DefaultValue;}
  88
  89                 bool IsDefaultValue() const {
  90                         return (DefaultISset() && Value == DefaultValue);
  91                 }
  92
  93         protected:
  94                 double Value; /// The actual value of the element
  95                 double DefaultValue;
  96 };
  97
  98 END_LIBEBML_NAMESPACE
  99
 100 #endif // LIBEBML_FLOAT_H