#ifndef f_VD2_PLUGIN_VDVIDEOUTIL_H
#define f_VD2_PLUGIN_VDVIDEOUTIL_H

template<class T>
T *vd_ptroffset(T *p, diff)
    return (T *)((char *)p + diff)


template<class T>
class vd_row_iter
public:
    vd_row_iter() {
    vd_row_iter(T *p, pitch) : mp(p), mpitch(pitch) {
    vd_row_iter(T *p, pitch, y) : mp(vd_ptroffset(p, pitch*y)), mpitch(pitch) {

    vd_row_iter( VFBitmap& bm, x = 0, y = 0) : mp(vd_ptroffset((T*)bm.data, bm.pitch*(bm.h - 1 - y))+x), mpitch(-bm.pitch) {

    operator T*()
        return mp

    T& operator[](int x)
        return mp[x]


    void mulstep(int x)
        mpitch *= x


     vd_row_iter<T>& operator+=(int y)
        mp = vd_ptroffset(mp, * y)
        return *self


     vd_row_iter<T>& operator-=(int y)
        mp = vd_ptroffset(mp, -(mpitch * y))
        return *self


     vd_row_iter<T>& operator++()
        mp = vd_ptroffset(mp, mpitch)
        return *self


     vd_row_iter<T> operator++(int)
         vd_row_iter<T> temp(*self)
        mp = vd_ptroffset(mp, mpitch)
        return temp


     vd_row_iter<T>& operator--()
        mp = vd_ptroffset(mp, -mpitch)
        return *self


     vd_row_iter<T> operator--(int)
         vd_row_iter<T> temp(*self)
        mp = vd_ptroffset(mp, -mpitch)
        return temp


protected:
    T *mp
    ptrdiff_t mpitch


typedef vd_row_iter<uint32> vd_pixrow_iter

inline uint32 vd_pixavg_down(uint32 x, y)
    return (x&y) + (((x^y)&0xfefefefe)>>1)


inline uint32 vd_pixavg_up(uint32 x, y)
    return (x|y) - (((x^y)&0xfefefefe)>>1)


inline void vd_pixunpack(uint32 px, r, g, b)
    r = (px>>16)&255
    g = (px>> 8)&255
    b = (px    )&255


inline uint32 vd_pixpack(int r, g, b)
    if ((unsigned)r >= 256) r = ~(r>>31) & 255
    if ((unsigned)g >= 256) g = ~(g>>31) & 255
    if ((unsigned)b >= 256) b = ~(b>>31) & 255

    return (r<<16) + (g<<8) + b


inline uint32 vd_pixpackfast(int r, g, b)
    return (r<<16) + (g<<8) + b


struct vd_transform_pixmap_helper
    vd_transform_pixmap_helper( VFBitmap& dst)
        : p((uint32 *)dst.data)
        , pitch(dst.pitch)
        , w(dst.w)
        , h(dst.h) {

    operator bool()
        return False


    uint32 *p
     ptrdiff_t pitch
     int w, h


#define vd_transform_pixmap_blt(dst, src)		\
	if(dstinfo = dst);else					\
	if(srcinfo = src);else					\
	for(y = 0, h = dstinfo.h, w = dstinfo.w; y < h; ++y, dstinfo.p=vd_ptroffset(dstinfo.p, dstinfo.pitch), srcinfo.p=vd_ptroffset(srcinfo.p, srcinfo.pitch))	\
	for(x = 0; x < dstinfo.w; ++x)			\
	switch(out = dstinfo.p[x]) case 0: default:		\
	switch( in = srcinfo.p[x]) case 0: default:

#define vd_transform_pixmap_inplace(dst)		\
	if(dstinfo = dst);else					\
	for(y = 0, h = dstinfo.h, w = dstinfo.w; y < h; ++y, dstinfo.p=vd_ptroffset(dstinfo.p, dstinfo.pitch))	\
	for(x = 0; x < dstinfo.w; ++x)			\
	switch(px = dstinfo.p[x]) case 0: default:		\

#define vd_maketable256_16(x) formula((x+0)),formula((x+1)),formula((x+2)),formula((x+3)),formula((x+4)),formula((x+5)),formula((x+6)),formula((x+7)),formula((x+8)),formula((x+9)),formula((x+10)),formula((x+11)),formula((x+12)),formula((x+13)),formula((x+14)),formula((x+15))
#define vd_maketable256 vd_maketable256_16(0x00),vd_maketable256_16(0x10),vd_maketable256_16(0x20),vd_maketable256_16(0x30),vd_maketable256_16(0x40),vd_maketable256_16(0x50),vd_maketable256_16(0x60),vd_maketable256_16(0x70),vd_maketable256_16(0x80),vd_maketable256_16(0x90),vd_maketable256_16(0xA0),vd_maketable256_16(0xB0),vd_maketable256_16(0xC0),vd_maketable256_16(0xD0),vd_maketable256_16(0xE0),vd_maketable256_16(0xF0),

#endif