
/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE 'XZYW' VNC CODEC SOURCE CODE.         *
 *                                                                  *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
 * GOVERNED BY A FOLLOWING BSD-STYLE SOURCE LICENSE.                *
 * PLEASE READ THESE TERMS BEFORE DISTRIBUTING.                     *
 *                                                                  *
 * THE 'XZYW' VNC CODEC SOURCE CODE IS (C) COPYRIGHT 2006         *
 * BY Hitachi Systems & Services, Ltd.                              *
 * (Noriaki Yamazaki, Research & Developement Center)               *                                                                 *
 *                                                                  *
 ********************************************************************
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are met:

- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright
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- Neither the name of the Hitachi Systems & Services, Ltd. nor 
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 ********************************************************************/

//#define XZYW_ENCODE
//#define XZYW_DECODE
#define XZYW_QUANTIZE

//[References]
// PLHarr:
//   Senecal, J. G., P. Lindstrom, M. A. Duchaineau, and K. I. Joy, "An Improved N-Bit to N-Bit Reversible Haar-Like Transform," Pacific Graphics 2004, October 2004, pp. 371-380.
// EZW:
//   Shapiro, JM: Embedded Image Coding Using Zerotrees of Wavelet Coefficients, IEEE Trans. Signal. Process., Vol.41, pp.3445-3462 (1993). 


// Template Macro stuffs.
#undef XZYW_ANALYZE
#undef XZYW_SYNTHESIZE
#define XZYW_ANALYZE __RFB_CONCAT3E(xzywAnalyze,BPP,END_FIX)
#define XZYW_SYNTHESIZE __RFB_CONCAT3E(xzywSynthesize,BPP,END_FIX)

#define XZYW_RGBYUV __RFB_CONCAT3E(xzywRGBYUV,BPP,END_FIX)
#define XZYW_YUVRGB __RFB_CONCAT3E(xzywYUVRGB,BPP,END_FIX)
#define XZYW_YMASK __RFB_CONCAT2E(XZYW_YMASK,BPP)
#define XZYW_UVMASK __RFB_CONCAT2E(XZYW_UVMASK,BPP)
#define XZYW_LOAD_PIXEL __RFB_CONCAT2E(XZYW_LOAD_PIXEL,BPP)
#define XZYW_SAVE_PIXEL __RFB_CONCAT2E(XZYW_SAVE_PIXEL,BPP)

// Packing/Unpacking pixel stuffs.
//   Endian conversion stuffs.
#undef S_0
#undef S_1
#undef L_0
#undef L_1
#undef L_2
#if XZYW_ENDIAN == ENDIAN_BIG
#  define S_0	1
#  define S_1	0
#  define L_0	3
#  define L_1	2
#  define L_2	1
#else
#  define S_0	0
#  define S_1	1
#  define L_0	0
#  define L_1	1
#  define L_2	2
#endif

//   Load/Save pixel stuffs.
#define XZYW_YMASK15  0xFFFFFFF8
#define XZYW_UVMASK15 0xFFFFFFF8
#define XZYW_LOAD_PIXEL15(pSrc,R,G,B) { \
	R =  (((unsigned char*)pSrc)[S_1]<< 1)& 0xF8;	\
	G = ((((unsigned char*)pSrc)[S_1]<< 6)|(((unsigned char*)pSrc)[S_0]>> 2))& 0xF8;	\
	B =  (((unsigned char*)pSrc)[S_0]<< 3)& 0xF8;	\
}
#define XZYW_SAVE_PIXEL15(pDst,R,G,B) { \
	R &= 0xF8;	\
	G &= 0xF8;	\
	B &= 0xF8;	\
	((unsigned char*)pDst)[S_1] = (unsigned char)( (R>>1)|(G>>6)       );	\
	((unsigned char*)pDst)[S_0] = (unsigned char)(((B>>3)|(G<<2))& 0xFF);	\
}
#define XZYW_YMASK16  0xFFFFFFFC
#define XZYW_UVMASK16 0xFFFFFFF8
#define XZYW_LOAD_PIXEL16(pSrc,R,G,B) { \
	R =   ((unsigned char*)pSrc)[S_1]     & 0xF8;	\
	G = ((((unsigned char*)pSrc)[S_1]<< 5)|(((unsigned char*)pSrc)[S_0]>> 3))& 0xFC;	\
	B =  (((unsigned char*)pSrc)[S_0]<< 3)& 0xF8;	\
}
#define XZYW_SAVE_PIXEL16(pDst,R,G,B) { \
	R &= 0xF8;	\
	G &= 0xFC;	\
	B &= 0xF8;	\
	((unsigned char*)pDst)[S_1] = (unsigned char)(  R    |(G>>5)       );	\
	((unsigned char*)pDst)[S_0] = (unsigned char)(((B>>3)|(G<<3))& 0xFF);	\
}
#define XZYW_YMASK32  0xFFFFFFFF
#define XZYW_UVMASK32 0xFFFFFFFF
#define XZYW_LOAD_PIXEL32(pSrc,R,G,B) { \
	R = ((unsigned char*)pSrc)[L_2];	\
	G = ((unsigned char*)pSrc)[L_1];	\
	B = ((unsigned char*)pSrc)[L_0];	\
}
#define XZYW_SAVE_PIXEL32(pDst,R,G,B) { \
	((unsigned char*)pDst)[L_2] = (unsigned char)R;	\
	((unsigned char*)pDst)[L_1] = (unsigned char)G;	\
	((unsigned char*)pDst)[L_0] = (unsigned char)B;	\
}

#ifndef XZYW_ONCE
#define XZYW_ONCE

#ifdef WIN32
#define InlineX __inline
#else
#define InlineX inline
#endif

#ifdef XZYW_ENCODE
// Tables for Coefficients filtering.
#  ifndef XZYW_QUANTIZE
// Type A:lower bit omitting of EZW style.
const static unsigned int xzywParam[3][3]={
	{0x0000F000,0x00000000,0x00000000},
	{0x0000C000,0x00F0F0F0,0x00000000},
	{0x0000C000,0x00C0C0C0,0x00F0F0F0},
//	{0x0000FF00,0x00000000,0x00000000},
//	{0x0000FF00,0x00FFFFFF,0x00000000},
//	{0x0000FF00,0x00FFFFFF,0x00FFFFFF},
};
#  else
// Type B:Non liner quantization filter.
static const signed char xzywConv[4][256]={
{	// bi=5, bo=5 r=0.0:PSNR=24.849
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
},
{	// bi=5, bo=5 r=2.0:PSNR=74.031
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 32, 
	32, 32, 32, 32, 32, 32, 32, 32, 
	32, 32, 32, 32, 32, 32, 32, 32, 
	48, 48, 48, 48, 48, 48, 48, 48, 
	48, 48, 48, 56, 56, 56, 56, 56, 
	56, 56, 56, 56, 64, 64, 64, 64, 
	64, 64, 64, 64, 72, 72, 72, 72, 
	72, 72, 72, 72, 80, 80, 80, 80, 
	80, 80, 88, 88, 88, 88, 88, 88, 
	88, 88, 88, 88, 88, 88, 96, 96, 
	96, 96, 96, 104, 104, 104, 104, 104, 
	104, 104, 104, 104, 104, 112, 112, 112, 
	112, 112, 112, 112, 112, 112, 120, 120, 
	120, 120, 120, 120, 120, 120, 120, 120, 
	0, -120, -120, -120, -120, -120, -120, -120, 
	-120, -120, -120, -112, -112, -112, -112, -112, 
	-112, -112, -112, -112, -104, -104, -104, -104, 
	-104, -104, -104, -104, -104, -104, -96, -96, 
	-96, -96, -96, -88, -88, -88, -88, -88, 
	-88, -88, -88, -88, -88, -88, -88, -80, 
	-80, -80, -80, -80, -80, -72, -72, -72, 
	-72, -72, -72, -72, -72, -64, -64, -64, 
	-64, -64, -64, -64, -64, -56, -56, -56, 
	-56, -56, -56, -56, -56, -56, -48, -48, 
	-48, -48, -48, -48, -48, -48, -48, -48, 
	-48, -32, -32, -32, -32, -32, -32, -32, 
	-32, -32, -32, -32, -32, -32, -32, -32, 
	-32, -32, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
},
{	// bi=5, bo=4 r=2.0:PSNR=64.441
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	48, 48, 48, 48, 48, 48, 48, 48, 
	48, 48, 48, 48, 48, 48, 48, 48, 
	48, 48, 48, 48, 48, 48, 48, 48, 
	64, 64, 64, 64, 64, 64, 64, 64, 
	64, 64, 64, 64, 64, 64, 64, 64, 
	80, 80, 80, 80, 80, 80, 80, 80, 
	80, 80, 80, 80, 80, 88, 88, 88, 
	88, 88, 88, 88, 88, 88, 88, 88, 
	104, 104, 104, 104, 104, 104, 104, 104, 
	104, 104, 104, 112, 112, 112, 112, 112, 
	112, 112, 112, 112, 120, 120, 120, 120, 
	120, 120, 120, 120, 120, 120, 120, 120, 
	0, -120, -120, -120, -120, -120, -120, -120, 
	-120, -120, -120, -120, -120, -112, -112, -112, 
	-112, -112, -112, -112, -112, -112, -104, -104, 
	-104, -104, -104, -104, -104, -104, -104, -104, 
	-104, -88, -88, -88, -88, -88, -88, -88, 
	-88, -88, -88, -88, -80, -80, -80, -80, 
	-80, -80, -80, -80, -80, -80, -80, -80, 
	-80, -64, -64, -64, -64, -64, -64, -64, 
	-64, -64, -64, -64, -64, -64, -64, -64, 
	-64, -48, -48, -48, -48, -48, -48, -48, 
	-48, -48, -48, -48, -48, -48, -48, -48, 
	-48, -48, -48, -48, -48, -48, -48, -48, 
	-48, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
},
{	// bi=5, bo=2 r=2.0:PSNR=43.175
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	88, 88, 88, 88, 88, 88, 88, 88, 
	88, 88, 88, 88, 88, 88, 88, 88, 
	88, 88, 88, 88, 88, 88, 88, 88, 
	88, 88, 88, 88, 88, 88, 88, 88, 
	88, 88, 88, 88, 88, 88, 88, 88, 
	88, 88, 88, 88, 88, 88, 88, 88, 
	88, 88, 88, 88, 88, 88, 88, 88, 
	88, 88, 88, 88, 88, 88, 88, 88, 
	0, -88, -88, -88, -88, -88, -88, -88, 
	-88, -88, -88, -88, -88, -88, -88, -88, 
	-88, -88, -88, -88, -88, -88, -88, -88, 
	-88, -88, -88, -88, -88, -88, -88, -88, 
	-88, -88, -88, -88, -88, -88, -88, -88, 
	-88, -88, -88, -88, -88, -88, -88, -88, 
	-88, -88, -88, -88, -88, -88, -88, -88, 
	-88, -88, -88, -88, -88, -88, -88, -88, 
	-88, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
	0, 0, 0, 0, 0, 0, 0, 0, 
}
};
const static signed char* xzywParam[3][3][3]={
	{{xzywConv[0],xzywConv[2],xzywConv[0]},{xzywConv[0],xzywConv[0],xzywConv[0]},{xzywConv[0],xzywConv[0],xzywConv[0]}},
	{{xzywConv[0],xzywConv[3],xzywConv[0]},{xzywConv[1],xzywConv[1],xzywConv[1]},{xzywConv[0],xzywConv[0],xzywConv[0]}},
	{{xzywConv[0],xzywConv[3],xzywConv[0]},{xzywConv[2],xzywConv[2],xzywConv[2]},{xzywConv[1],xzywConv[1],xzywConv[1]}},
};
#  endif
#endif

static InlineX void Harr( signed char* pX0, signed char* pX1 ){
	// Piecewise-Linear Harr(PLHarr)
	int X0=(int)*pX0, X1=(int)*pX1;
	int orgX0=X0, orgX1=X1;
	if( (X0^X1)&0x80 ){
		// differ sign
		X1 += X0;
		if( ((X1^orgX1)&0x80)==0 ){
			// |X1| > |X0|
			X0 -= X1;	// H = -B
		}
	}else{
		// same sign
		X0 -= X1;
		if( ((X0^orgX0)&0x80)==0 ){
			// |X0| > |X1|
			X1 += X0;	// L = A
		}
	}
	*pX0 = (signed char)X1;
	*pX1 = (signed char)X0;
}
// 1D-Wavelet transform.
//
// In coefficients array, the famous 'pyramid' decomposition is well used.
//
// 1D Model:
//   |L0L0L0L0|L0L0L0L0|H0H0H0H0|H0H0H0H0| : level 0
//   |L1L1L1L1|H1H1H1H1|H0H0H0H0|H0H0H0H0| : level 1
//
// But this method needs line buffer because H/L is different position from X0/X1.
// So, I used 'interleave' decomposition instead of it.
//
// 1D Model:
//   |L0H0L0H0|L0H0L0H0|L0H0L0H0|L0H0L0H0| : level 0
//   |L1H0H1H0|L1H0H1H0|L1H0H1H0|L1H0H1H0| : level 1
//
// In this method, H/L and X0/X1 is always same position.
// This lead us to more speed and less memory.
// Of cause, the result of both method is quite same
// because it's only difference that coefficient position.

static InlineX void WaveletLevel( int* data, int size, int l, int SkipPixel ){
	int s, ofs;
	signed char* pX0;
	signed char* end;

	pX0 = (signed char*)data;
	s = (8<<l)*SkipPixel;
	end = pX0+(size>>(l+1))*s;
	s -= 2;
	ofs = (4<<l)*SkipPixel;
	while( pX0 < end ){
		Harr( pX0, pX0+ofs );
		pX0++;
		Harr( pX0, pX0+ofs );
		pX0++;
		Harr( pX0, pX0+ofs );
		pX0 += s;
	}
}
#define InvWaveletLevel(d,s,l,pix) WaveletLevel(d,s,l,pix)

#ifdef XZYW_ENCODE
#  ifndef XZYW_QUANTIZE
// Type A:lower bit omitting of EZW style.
static InlineX void FilterWaveletSquare( int* pBuf, int width, int height, int level, int l ){
	int r, s;
	int x, y;
	int* pH;
	const unsigned int* pM;

	pM = &(xzywParam[level-1][l]);
	s = 2<<l;
	for( r=1; r<4; r++ ){
		pH   = pBuf;
		if( r & 0x01 ){
			pH +=  s>>1;
		}
		if( r & 0x02 ){
			pH += (s>>1)*width;
		}
		for( y=0; y<height/s; y++ ){
			for( x=0; x<width/s; x++ ){
				// these are same following code.
				//     pH[x] = pH[x] / (~pM[x]+1) * (~pM[x]+1);
				//     ( round pH[x] with pM[x] bit )
				// '&' operator isn't 'round' but is 'floor'.
				// So, we must offset when pH[x] is negative.
				if( ((signed char*)pH)[0] & 0x80 ){
					((signed char*)pH)[0] += ~((signed char*)pM)[0];
				}
				if( ((signed char*)pH)[1] & 0x80 ){
					((signed char*)pH)[1] += ~((signed char*)pM)[1];
				}
				if( ((signed char*)pH)[2] & 0x80 ){
					((signed char*)pH)[2] += ~((signed char*)pM)[2];
				}
				*pH &= *pM;
				pH += s;
			}
			pH += (s-1)*width;
		}
	}
}
#  else
// Type B:Non liner quantization filter.
//
// Coefficients have Gaussian curve and smaller value which is 
// large part of coefficients isn't more important than larger value.
// So, I use filter of Non liner quantize/dequantize table.
// In general, Non liner quantize formula is explained as following.
//
//    y=f(x)   = sign(x)*round( ((abs(x)/(2^7))^ r   )* 2^(bo-1) )*2^(8-bo)
//    x=f-1(y) = sign(y)*round( ((abs(y)/(2^7))^(1/r))* 2^(bi-1) )*2^(8-bi)
// ( r:power coefficient  bi:effective MSB in input  bo:effective MSB in output )
//
//   r < 1.0 : Smaller value is more important than larger value.
//   r > 1.0 : Larger value is more important than smaller value.
//   r = 1.0 : Liner quantization which is same with EZW style.
//
// r = 0.75 is famous non liner quantization used in MP3 audio codec.
// In contrast to audio data, larger value is important in wavelet coefficients.
// So, I select r = 2.0 table( quantize is x^2, dequantize sqrt(x) ).
//
// As compared with EZW style liner quantization, this filter tended to be 
// more sharp edge and be more compression rate but be more blocking noise and be less quality.
// Especially, the surface of graphic objects has distinguishable noise in middle quality mode.
//
// We need only quantized-dequantized(filtered) value rather than quantized value itself
// because all values are packed or palette-lized in later XZ section.
// This lead us not to need to modify client decoder when we change
// the filtering procedure in future.
// Client only decodes coefficients given by encoder.
static InlineX void FilterWaveletSquare( int* pBuf, int width, int height, int level, int l ){
	int r, s;
	int x, y;
	int* pH;
	const signed char** pM;

	pM = xzywParam[level-1][l];
	s = 2<<l;
	for( r=1; r<4; r++ ){
		pH   = pBuf;
		if( r & 0x01 ){
			pH +=  s>>1;
		}
		if( r & 0x02 ){
			pH += (s>>1)*width;
		}
		for( y=0; y<height/s; y++ ){
			for( x=0; x<width/s; x++ ){
				((signed char*)pH)[0] = pM[0][((unsigned char*)pH)[0]];
				((signed char*)pH)[1] = pM[1][((unsigned char*)pH)[1]];
				((signed char*)pH)[2] = pM[2][((unsigned char*)pH)[2]];
				pH += s;
			}
			pH += (s-1)*width;
		}
	}
}
#  endif

static InlineX void Wavelet( int* pBuf, int width, int height, int level ){
	int l, s;
	int* pTop;
	int* pEnd;

	for( l=0; l<level; l++ ){
		pTop = pBuf;
		pEnd = pBuf+height*width;
		s = width<<l;
		while( pTop < pEnd ){
			WaveletLevel( pTop, width, l, 1 );
			pTop += s;
		}
		pTop = pBuf;
		pEnd = pBuf+width;
		s = 1<<l;
		while( pTop < pEnd ){
			WaveletLevel( pTop, height,l, width );
			pTop += s;
		}
		FilterWaveletSquare( pBuf, width, height, level, l );
	}
}
#endif
#ifdef XZYW_DECODE
static InlineX void InvWavelet( int* pBuf, int width, int height, int level ){
	int l, s;
	int* pTop;
	int* pEnd;

	for( l=level-1; l>=0; l-- ){
		pTop = pBuf;
		pEnd = pBuf+width;
		s = 1<<l;
		while( pTop < pEnd ){
			InvWaveletLevel( pTop, height,l, width );
			pTop += s;
		}
		pTop = pBuf;
		pEnd = pBuf+height*width;
		s = width<<l;
		while( pTop < pEnd ){
			InvWaveletLevel( pTop, width, l, 1 );
			pTop += s;
		}
	}
}
#endif

// Load/Save coefficients stuffs.
// Coefficients manages as 24 bits little-endian pixel.
#define XZYW_LOAD_COEFF(pSrc,R,G,B) { \
	R = ((signed char*)pSrc)[2];	\
	G = ((signed char*)pSrc)[1];	\
	B = ((signed char*)pSrc)[0];	\
}
#define XZYW_SAVE_COEFF(pDst,R,G,B) { \
	((signed char*)pDst)[2] = (signed char)R;	\
	((signed char*)pDst)[1] = (signed char)G;	\
	((signed char*)pDst)[0] = (signed char)B;	\
}

// RGB <=> YUV conversion stuffs.
// YUV coversion is explained as following formula in strict meaning:
//   Y =  0.299R + 0.587G + 0.114B (   0<=Y<=255)
//   U = -0.169R - 0.331G + 0.500B (-128<=U<=127)
//   V =  0.500R - 0.419G - 0.081B (-128<=V<=127)
// 
// I use simple conversion RCT(reversible color transform) which is described 
// in JPEG-2000 specification.
//   Y = (R + 2G + B)/4 (   0<=Y<=255)
//   U = B-G (-256<=U<=255)
//   V = R-G (-256<=V<=255)

#define ROUND(x) (((x)<0)?0:(((x)>255)?255:(x)))
	// RCT is N-bit RGB to N-bit Y and N+1-bit UV.
	// For make Same N-bit, UV is lossy.
	// More exact PLHarr, we reduce to odd range(-127<=x<=127).
#define XZYW_RGBYUV1(R,G,B,Y,U,V,ymask,uvmask) { \
	Y = (R+(G<<1)+B)>>2;	\
	U =  B-G;	\
	V =  R-G;	\
	Y -= 128;	\
	U >>= 1;	\
	V >>= 1;	\
	Y &= ymask;	\
	U &= uvmask;	\
	V &= uvmask;	\
	if( Y == -128 ){	\
		Y += (0xFFFFFFFF-ymask+1);	\
	}	\
	if( U == -128 ){	\
		U += (0xFFFFFFFF-uvmask+1);	\
	}	\
	if( V == -128 ){	\
		V += (0xFFFFFFFF-uvmask+1);	\
	}	\
}
#define XZYW_YUVRGB1(R,G,B,Y,U,V) { \
	Y += 128;	\
	U <<= 1;	\
	V <<= 1;	\
	G = Y-((U+V)>>2);	\
	B = U+G;	\
	R = V+G;	\
	G = ROUND(G);	\
	B = ROUND(B);	\
	R = ROUND(R);	\
}

// coefficient packing/unpacking stuffs.
// Wavelet transform makes 4 sub coefficient image from 1 original image.
//
// model with pyramid decomposition:
//   +------+------+
//   |      |      |
//   |  L   |  Hx  |
//   |      |      |
//   +------+------+
//   |      |      |
//   |  H   |  Hxy |
//   |      |      |
//   +------+------+
//
// So, we must transfer each sub images individually in strict meaning.
// But at least XZ meaning, following one decompositon image is same as
// avobe individual sub image. I use this format.
// (Strictly saying, transfer order is reverse(Hxy->Hy->Hx->L)
//  for simplified procedure for any wavelet level.)
//
//   +------+------+
//   |      L      |
//   +------+------+
//   |      Hx     |
//   +------+------+
//   |      Hy     |
//   +------+------+
//   |      Hxy    |
//   +------+------+

#define XZYW_TRANSFER_COEFF(pBuf,data,r,width,height,level,TRANS)	\
	pH = pBuf;	\
	s = 2<<level;	\
	if( r & 0x01 ){	\
		pH +=  s>>1;	\
	}	\
	if( r & 0x02 ){	\
		pH += (s>>1)*width;	\
	}	\
	pEnd = pH+height*width;	\
	while( pH < pEnd ){	\
		pLine = pH+width;	\
		while( pH < pLine ){	\
			TRANS	\
			data++;	\
			pH += s;	\
		}	\
		pH += (s-1)*width;	\
	}

#define XZYW_PACK_COEFF(pBuf,data,r,width,height,level)	\
	XZYW_TRANSFER_COEFF(pBuf,data,r,width,height,level,XZYW_LOAD_COEFF(pH,R,G,B);XZYW_SAVE_PIXEL(data,R,G,B);)

#define XZYW_UNPACK_COEFF(pBuf,data,r,width,height,level)	\
	XZYW_TRANSFER_COEFF(pBuf,data,r,width,height,level,XZYW_LOAD_PIXEL(data,R,G,B);XZYW_SAVE_COEFF(pH,R,G,B);)

#define XZYW_SAVE_UNALIGN(data,TRANS)	\
	pTop = pBuf+w*h;	\
	pEnd = pTop + (w+uw)*(h+uh)-w*h;	\
	while( pTop < pEnd ){	\
		TRANS	\
		data++;	\
		pTop++;	\
	}

#define XZYW_LOAD_UNALIGN(data,pData,TRANS)	\
	pTop = pBuf+w*h;	\
	if( uw ){	\
		pData=         data + w;	\
		pEnd = (int*)(pData+ h*scanline);	\
		while( pData < (PIXEL_T*)pEnd ){	\
			pLine = (int*)(pData + uw);	\
			while( pData < (PIXEL_T*)pLine ){	\
				TRANS	\
				pData++;	\
				pTop++;	\
			}	\
			pData += scanline-uw;	\
		}	\
	}	\
	if( uh ){	\
		pData=         data +  h*scanline;	\
		pEnd = (int*)(pData+ uh*scanline);	\
		while( pData < (PIXEL_T*)pEnd ){	\
			pLine = (int*)(pData + w);	\
			while( pData < (PIXEL_T*)pLine ){	\
				TRANS	\
				pData++;	\
				pTop++;	\
			}	\
			pData += scanline-w;	\
		}	\
	}	\
	if( uw && uh ){	\
		pData=         data + w+ h*scanline;	\
		pEnd = (int*)(pData+   uh*scanline);	\
		while( pData < (PIXEL_T*)pEnd ){	\
			pLine = (int*)(pData + uw);	\
			while( pData < (PIXEL_T*)pLine ){	\
				TRANS	\
				pData++;	\
				pTop++;	\
			}	\
			pData += scanline-uw;	\
		}	\
	}

static InlineX void xzywCalcSize( int* pW, int* pH, int level ){
	*pW &= ~((1<<level)-1);
	*pH &= ~((1<<level)-1);
}

#endif // XZYW_ONCE

#ifndef CPIXEL
#ifdef XZYW_ENCODE
static InlineX void XZYW_RGBYUV( int* pBuf, PIXEL_T* data, int width, int height, int scanline ){
	int R, G, B;
	int Y, U, V;
	int* pLine;
	int* pEnd;
	pEnd = pBuf+height*width;
	while( pBuf < pEnd ){
		pLine = pBuf+width;
		while( pBuf < pLine ){
			XZYW_LOAD_PIXEL(data,R,G,B);
			XZYW_RGBYUV1(R,G,B,Y,U,V,XZYW_YMASK,XZYW_UVMASK);
			XZYW_SAVE_COEFF(pBuf,V,Y,U);
			pBuf++;
			data++;
		}
		data += scanline-width;
	}
}
#endif
#ifdef XZYW_DECODE
static InlineX void XZYW_YUVRGB( int* pBuf, PIXEL_T* data, int width, int height, int scanline ){
	int R, G, B;
	int Y, U, V;
	int* pLine;
	int* pEnd;
	pEnd = pBuf+height*width;
	while( pBuf < pEnd ){
		pLine = pBuf+width;
		while( pBuf < pLine ){
			XZYW_LOAD_COEFF(pBuf,V,Y,U);
			XZYW_YUVRGB1(R,G,B,Y,U,V);
			XZYW_SAVE_PIXEL(data,R,G,B);
			pBuf++;
			data++;
		}
		data += scanline-width;
	}
}
#endif

#ifdef XZYW_ENCODE
PIXEL_T* XZYW_ANALYZE ( PIXEL_T* dst, PIXEL_T* src, int w, int h, int scanline, int level, int* pBuf ){
	int l;
	int uw = w;
	int uh = h;
	int* pTop;
	int* pEnd;
	int* pLine;
	PIXEL_T* pSrc;
	int R, G, B;
	int s;
	int* pH;

	xzywCalcSize( &w, &h, level );
	if( (w==0)||(h==0) ){
		return NULL;
	}
	uw -= w;
	uh -= h;

	XZYW_LOAD_UNALIGN(src,pSrc,*(PIXEL_T*)pTop=*pSrc;)
	XZYW_RGBYUV( pBuf, src, w, h, scanline );
	Wavelet( pBuf, w, h, level );
	for( l=0; l<level; l++ ){
		XZYW_PACK_COEFF( pBuf, dst, 3, w, h, l );
		XZYW_PACK_COEFF( pBuf, dst, 2, w, h, l );
		XZYW_PACK_COEFF( pBuf, dst, 1, w, h, l );
		if( l == level-1 ){
			XZYW_PACK_COEFF( pBuf, dst, 0, w, h, l );
		}
	}
	XZYW_SAVE_UNALIGN(dst,*dst=*(PIXEL_T*)pTop;)
	return dst;
}
#endif
#ifdef XZYW_DECODE
PIXEL_T* XZYW_SYNTHESIZE ( PIXEL_T* dst, PIXEL_T* src, int w, int h, int scanline, int level, int* pBuf ){
	int l;
	int uw = w;
	int uh = h;
	int* pTop;
	int* pEnd;
	int* pLine;
	PIXEL_T* pDst;
	int R, G, B;
	int s;
	int* pH;

	xzywCalcSize( &w, &h, level );
	if( (w==0)||(h==0) ){
		return NULL;
	}
	uw -= w;
	uh -= h;

	for( l=0; l<level; l++ ){
		XZYW_UNPACK_COEFF( pBuf, src, 3, w, h, l );
		XZYW_UNPACK_COEFF( pBuf, src, 2, w, h, l );
		XZYW_UNPACK_COEFF( pBuf, src, 1, w, h, l );
		if( l == level-1 ){
			XZYW_UNPACK_COEFF( pBuf, src, 0, w, h, l );
		}
	}
	XZYW_SAVE_UNALIGN(src,*(PIXEL_T*)pTop=*src;)
	InvWavelet( pBuf, w, h, level );
	XZYW_YUVRGB( pBuf, dst, w, h, scanline );
	XZYW_LOAD_UNALIGN(dst,pDst,*pDst=*(PIXEL_T*)pTop;)
	return src;
}
#endif
#endif  // CPIXEL

#undef XZYW_RGBYUV
#undef XZYW_YUVRGB
#undef XZYW_LOAD_PIXEL
#undef XZYW_SAVE_PIXEL
