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;

public:
    CSubband();

    ~CSubband();

    bool AllocMemory();

    void FreeMemory();

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

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

    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;
    const PGFRect& GetROI() const       { return m_ROI; }
    void SetNTiles(UINT32 nTiles)       { m_nTiles = nTiles; }
    void SetROI(const PGFRect& roi)     { ASSERT(roi.right <= m_width); ASSERT(roi.bottom <= m_height); m_ROI = 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