gdcmJPEGCodec.h

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00001 /*=========================================================================
00002 
00003   Program: GDCM (Grassroots DICOM). A DICOM library
00004   Module:  $URL$
00005 
00006   Copyright (c) 2006-2010 Mathieu Malaterre
00007   All rights reserved.
00008   See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
00009 
00010      This software is distributed WITHOUT ANY WARRANTY; without even
00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00012      PURPOSE.  See the above copyright notice for more information.
00013 
00014 =========================================================================*/
00015 #ifndef GDCMJPEGCODEC_H
00016 #define GDCMJPEGCODEC_H
00017 
00018 #include "gdcmImageCodec.h"
00019 
00020 namespace gdcm
00021 {
00022 
00023 class PixelFormat;
00024 class TransferSyntax;
00041 class GDCM_EXPORT JPEGCodec : public ImageCodec
00042 {
00043 public:
00044   JPEGCodec();
00045   ~JPEGCodec();
00046   bool CanDecode(TransferSyntax const &ts) const;
00047   bool CanCode(TransferSyntax const &ts) const;
00048   bool Decode(DataElement const &is, DataElement &os);
00049   void SetPixelFormat(PixelFormat const &pf);
00050 
00052   void ComputeOffsetTable(bool b);
00053 
00055   bool Code(DataElement const &in, DataElement &out);
00056 
00057   virtual bool GetHeaderInfo(std::istream &is, TransferSyntax &ts);
00058 
00059   //void SetReversible(bool res);
00060 
00061   void SetQuality(double q);
00062   double GetQuality() const;
00063 
00064   void SetLossless(bool l);
00065   bool GetLossless() const;
00066 
00067 protected:
00068   bool Decode(std::istream &is, std::ostream &os);
00069   bool IsValid(PhotometricInterpretation const &pi);
00070 
00071 protected:
00072   // Internal method called by SetPixelFormat
00073   // Instantiate the right jpeg codec (8, 12 or 16)
00074   void SetBitSample(int bit);
00075 
00076 protected:
00077   int BitSample;
00078   bool Lossless;
00079   int Quality;
00080 
00081 private:
00082   void SetupJPEGBitCodec(int bit);
00083   JPEGCodec *Internal;
00084 };
00085 
00086 } // end namespace gdcm
00087 
00088 #endif //GDCMJPEGCODEC_H

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