FileReader.h

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/*
        This file is part of ALIZE which is an open-source tool for 
        speaker recognition.

    ALIZE is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as 
    published by the Free Software Foundation, either version 3 of 
    the License, or any later version.

    ALIZE 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 ALIZE.
    If not, see <http://www.gnu.org/licenses/>.
        
        ALIZE is a development project initiated by the ELISA consortium
        [alize.univ-avignon.fr/] and funded by the French Research 
        Ministry in the framework of the TECHNOLANGUE program 
        [www.technolangue.net]

        The ALIZE project team wants to highlight the limits of voice
        authentication in a forensic context.
        The "Person  Authentification by Voice: A Need of Caution" paper 
        proposes a good overview of this point (cf. "Person  
        Authentification by Voice: A Need of Caution", Bonastre J.F., 
        Bimbot F., Boe L.J., Campbell J.P., Douglas D.A., Magrin-
        chagnolleau I., Eurospeech 2003, Genova].
        The conclusion of the paper of the paper is proposed bellow:
        [Currently, it is not possible to completely determine whether the 
        similarity between two recordings is due to the speaker or to other 
        factors, especially when: (a) the speaker does not cooperate, (b) there 
        is no control over recording equipment, (c) recording conditions are not 
        known, (d) one does not know whether the voice was disguised and, to a 
        lesser extent, (e) the linguistic content of the message is not 
        controlled. Caution and judgment must be exercised when applying speaker 
        recognition techniques, whether human or automatic, to account for these 
        uncontrolled factors. Under more constrained or calibrated situations, 
        or as an aid for investigative purposes, judicious application of these 
        techniques may be suitable, provided they are not considered as infallible.
        At the present time, there is no scientific process that enables one to 
        uniquely characterize a person=92s voice or to identify with absolute 
        certainty an individual from his or her voice.]
        Contact Jean-Francois Bonastre for more information about the licence or
        the use of ALIZE

        Copyright (C) 2003-2010
        Laboratoire d'informatique d'Avignon [lia.univ-avignon.fr]
        ALIZE admin [alize@univ-avignon.fr]
        Jean-Francois Bonastre [jean-francois.bonastre@univ-avignon.fr]
*/

#if !defined(ALIZE_FileReader_h)
#define ALIZE_FileReader_h

#if defined(_WIN32)
#if defined(ALIZE_EXPORTS)
#define ALIZE_API __declspec(dllexport)
#else
#define ALIZE_API __declspec(dllimport)
#endif
#else
#define ALIZE_API
#endif

#include <cstdio>
#include "Object.h"
#include "alizeString.h"
#include "RealVector.h"


namespace alize
{


  class ALIZE_API FileReader : virtual public Object
  {
  
    friend class TestFeatureFileReaderRaw;
    friend class TestFeatureFileReaderHTK;
    friend class TestFeatureFileReaderSPro4;
    friend class TestFeatureFileReader;
    friend class TestMixtureFileReaderRaw;
    friend class TestMixtureFileReaderAmiral;

  public :


    explicit FileReader(const FileName&, const String& path,
                                  const String& extension, bool swap);
    static FileReader& create(const FileName& f, const String& path,
                                  const String& extension, bool swap);

    virtual ~FileReader();

    bool isClosed() const;

    bool isOpen() const;

    virtual void close();

    virtual void reset();

    char readChar();
    
    int readInt2();
    
    long readInt4();
    
    unsigned long readUInt4();
    
    double readDouble();
    
    float readFloat();

    FloatVector& readFloats(FloatVector& v);

    unsigned long readSomeFloats(FloatVector& v);
    
    const String& readLine();

    const String& readString(unsigned long length);

    const String& getFullFileName() const;

    const String& getFileName() const;
    
    void open();

    unsigned long getFileLength();

    void seek(unsigned long pos);

    void rewind();
    long tell();
    bool& swap();
    void swap2Bytes(void *src, void *dest);
    void swap4Bytes(void *src, void *dest);
    void swap4Bytes(void *src);
    void swap8Bytes(void *src, void *dest);

    virtual String toString() const;
    virtual String getClassName() const;


  protected :
    
    String _fullFileName;

  private :


    FILE*          _pFileStruct; 
    FileName       _fileName;
    String         _path;
    String         _extension;
    unsigned long  _fileLength;
    bool           _fileLengthDefined;
    mutable String _string; 
    bool           _swap; 






    void read(void* buffer, unsigned long length);

    FileReader(const FileReader&); 
    const FileReader& operator=(const FileReader&); 
    bool operator==(const FileReader&) const; 
    bool operator!=(const FileReader&) const; 
  };

} // end namespace alize

#endif // !defined(ALIZE_FileReader_h)