Subband.h

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/*
 * The Progressive Graphics File; http://www.libpgf.org 
 * 
 * $Date: 2006-06-04 22:05:59 +0200 (So, 04 Jun 2006) $
 * $Revision: 229 $
 * 
 * This file Copyright (C) 2006 xeraina GmbH, Switzerland
 * 
 * This program 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 2.1
 * of the License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

 
#ifndef PGF_SUBBAND_H
#define PGF_SUBBAND_H
 
#include "PGFtypes.h"
 
class CEncoder;
class CDecoder;
class CRoiIndices;

class CSubband {
        friend class CWaveletTransform;
        friend class CRoiIndices;
 
public:
        CSubband();

        ~CSubband();

        bool AllocMemory();

        void FreeMemory();

        void ExtractTile(CEncoder& encoder, bool tile = false, UINT32 tileX = 0, UINT32 tileY = 0);

        void PlaceTile(CDecoder& decoder, int quantParam, bool tile = false, UINT32 tileX = 0, UINT32 tileY = 0);

        void Quantize(int quantParam);

        void Dequantize(int quantParam);

        void SetData(UINT32 pos, DataT v)       { ASSERT(pos < m_size); m_data[pos] = v; }

        DataT* GetBuffer()                                      { return m_data; }

        DataT GetData(UINT32 pos) const         { ASSERT(pos < m_size); return m_data[pos]; }

        int GetLevel() const                            { return m_level; }

        int GetHeight() const                           { return m_height; }

        int GetWidth() const                            { return m_width; }
        
        Orientation GetOrientation() const      { return m_orientation; }
 
#ifdef __PGFROISUPPORT__
        void IncBuffRow(UINT32 pos)     { m_dataPos = pos + BufferWidth(); }
 
#endif
 
private:
        void Initialize(UINT32 width, UINT32 height, int level, Orientation orient);
        void WriteBuffer(DataT val)                     { ASSERT(m_dataPos < m_size); m_data[m_dataPos++] = val; }
        void SetBuffer(DataT* b)                        { ASSERT(b); m_data = b; }
        DataT ReadBuffer()                                      { ASSERT(m_dataPos < m_size); return m_data[m_dataPos++]; }
 
        UINT32 GetBuffPos() const                       { return m_dataPos; }
 
#ifdef __PGFROISUPPORT__
        UINT32 BufferWidth() const                      { return m_ROI.Width(); }
        void TilePosition(UINT32 tileX, UINT32 tileY, UINT32& left, UINT32& top, UINT32& w, UINT32& h) const;
        void TileIndex(bool topLeft, UINT32 xPos, UINT32 yPos, UINT32& tileX, UINT32& tileY, UINT32& x, UINT32& y) const;
        const PGFRect& GetAlignedROI() const { return m_ROI; }
        void SetNTiles(UINT32 nTiles)           { m_nTiles = nTiles; }
        void SetAlignedROI(const PGFRect& roi);
        void InitBuffPos(UINT32 left = 0, UINT32 top = 0)       { m_dataPos = top*BufferWidth() + left; ASSERT(m_dataPos < m_size); }
#else
        void InitBuffPos()                                      { m_dataPos = 0; }
#endif
 
private:
        UINT32 m_width;                                 
        UINT32 m_height;                                
        UINT32 m_size;                                  
        int m_level;                                    
        Orientation m_orientation;              
        UINT32 m_dataPos;                               
        DataT* m_data;                                  
 
#ifdef __PGFROISUPPORT__
        PGFRect m_ROI;                                  
        UINT32  m_nTiles;                               
#endif
};
 
#endif //PGF_SUBBAND_H