diff options
Diffstat (limited to 'mpeglib/lib/util/render/dither/dither32Bit.cpp')
| -rw-r--r-- | mpeglib/lib/util/render/dither/dither32Bit.cpp | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/mpeglib/lib/util/render/dither/dither32Bit.cpp b/mpeglib/lib/util/render/dither/dither32Bit.cpp new file mode 100644 index 00000000..61a1d2dc --- /dev/null +++ b/mpeglib/lib/util/render/dither/dither32Bit.cpp @@ -0,0 +1,253 @@ +/* + dither 32 bit depth yuv images + Copyright (C) 2000 Martin Vogt + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU Library General Public License as published by + the Free Software Foundation. + + For more information look at the file COPYRIGHT in this package + + */ + + +#include "dither32Bit.h" + + +#define doRow(row,Lum) *row++=(local_r_2_pix[Lum] | \ + local_g_2_pix[Lum] | local_b_2_pix[Lum]) + + +Dither32Bit::Dither32Bit(unsigned int redMask, + unsigned int greenMask,unsigned int blueMask) { + + + colorTableHighBit=new ColorTableHighBit(32,redMask,greenMask,blueMask); + L_tab=colorTableHighBit->getL_tab(); + Cr_r_tab=colorTableHighBit->getCr_r_tab(); + Cr_g_tab=colorTableHighBit->getCr_g_tab(); + Cb_g_tab=colorTableHighBit->getCb_g_tab(); + Cb_b_tab=colorTableHighBit->getCb_b_tab(); + + r_2_pix=colorTableHighBit->getr_2_pix(); + g_2_pix=colorTableHighBit->getg_2_pix(); + b_2_pix=colorTableHighBit->getb_2_pix(); + +} + + +Dither32Bit::~Dither32Bit() { + delete colorTableHighBit; +} + + +void Dither32Bit::ditherImageColor32(unsigned char* lum, + unsigned char* cr, + unsigned char* cb, + unsigned char* out, + int rows, + int cols, + int mod) { + + int L; + int n; + int rowWork; + int colWork; + + unsigned int *row1, *row2; + unsigned char *lum2; + PIXVAL* local_r_2_pix; + PIXVAL* local_g_2_pix; + PIXVAL* local_b_2_pix; + + row1 = (unsigned int *)out; + + row2 = row1+cols+mod; + lum2 = lum+cols; + + // because the width/height are a multiply of a macroblocksize + // cols/rows always are even + colWork=cols>>1; + rowWork=rows>>1; + mod=cols+2*mod; + + while(rowWork--) { + n=colWork; + while(n--) { + + local_r_2_pix=r_2_pix+Cr_r_tab[*cr]; + local_g_2_pix=g_2_pix+Cr_g_tab[*cr++] + Cb_g_tab[*cb]; + local_b_2_pix=b_2_pix+Cb_b_tab[*cb++]; + + L = L_tab[*lum++]; + doRow(row1,L); + + L = L_tab[*lum++]; + doRow(row1,L); + + L = L_tab [*lum2++]; + doRow(row2,L); + + L = L_tab [*lum2++]; + doRow(row2,L); + + + } + row2 += mod; + lum += cols; + lum2 += cols; + row1 += mod; + + } + +} + +/* + *-------------------------------------------------------------- + * + * Twox2Color32 -- + * + * Converts image into 24/32 bit color. + * + * Results: + * None. + * + * Side effects: + * None. + * + *-------------------------------------------------------------- + */ + +void Dither32Bit::ditherImageTwox2Color32(unsigned char* lum, + unsigned char* cr, + unsigned char* cb, + unsigned char* out, + int rows, + int cols, + int mod) { + int L, CR, CB; + unsigned PIXVAL *row1 = (unsigned PIXVAL *)out; + unsigned PIXVAL *row2 = row1 + cols * ONE_TWO + mod; + unsigned PIXVAL *row3 = row2 + cols * ONE_TWO + mod; + unsigned PIXVAL *row4 = row3 + cols * ONE_TWO + mod; + unsigned char *lum2; + int x, y; + int cr_r; + int cr_g; + int cb_g; + int cb_b; + int cols_2 = cols/2; + int loffset = ONE_TWO * 6 *cols_2 + 4*mod ; + + lum2 = lum + cols_2 + cols_2; + for (y=0; y<rows; y+=2) { + for (x=0; x<cols_2; x++) { + int R, G, B; + PIXVAL t; + + CR = *cr++; + CB = *cb++; + cr_r = Cr_r_tab[CR]; + cr_g = Cr_g_tab[CR]; + cb_g = Cb_g_tab[CB]; + cb_b = Cb_b_tab[CB]; + + L = L_tab[ (int) *lum++]; + + R = L + cr_r; + G = L + cr_g + cb_g; + B = L + cb_b; + + t = (r_2_pix[R] | g_2_pix[G] | b_2_pix[B]); + row1[0] = t; + row2[0] = t; +#ifndef SIXTYFOUR_BIT + row1[1] = t; + row2[1] = t; +#endif + row1 += ONE_TWO; + row2 += ONE_TWO; + + /* INTERPOLATE is now standard */ + // INTERPOLATE + if(x != cols_2 - 1) { + CR = (CR + *cr) >> 1; + CB = (CB + *cb) >> 1; + cr_r = Cr_r_tab[CR]; + cr_g = Cr_g_tab[CR]; + cb_g = Cb_g_tab[CB]; + cb_b = Cb_b_tab[CB]; + } + // end + /* end INTERPOLATE */ + + L = L_tab[ (int) *lum++]; + + R = L + cr_r; + G = L + cr_g + cb_g; + B = L + cb_b; + + t = (r_2_pix[R] | g_2_pix[G] | b_2_pix[B]); + row1[0] = t; + row2[0] = t; +#ifndef SIXTYFOUR_BIT + row1[1] = t; + row2[1] = t; +#endif + row1 += ONE_TWO; + row2 += ONE_TWO; + + /* + * Now, do second row. + */ + /* INTERPOLATE is now standard */ + // INTERPOLATE + if(y != rows - 2) { + CR = (unsigned int) (CR + *(cr + cols_2 - 1)) >> 1; + CB = (unsigned int) (CB + *(cb + cols_2 - 1)) >> 1; + cr_r = Cr_r_tab[CR]; + cr_g = Cr_g_tab[CR]; + cb_g = Cb_g_tab[CB]; + cb_b = Cb_b_tab[CB]; + } + // end + /* endif */ + L = L_tab[ (int) *lum2++]; + R = L + cr_r; + G = L + cr_g + cb_g; + B = L + cb_b; + + t = (r_2_pix[R] | g_2_pix[G] | b_2_pix[B]); + row3[0] = t; + row4[0] = t; +#ifndef SIXTYFOUR_BIT + row3[1] = t; + row4[1] = t; +#endif + row3 += ONE_TWO; + row4 += ONE_TWO; + + L = L_tab[(int) *lum2++]; + R = L + cr_r; + G = L + cr_g + cb_g; + B = L + cb_b; + + t = (r_2_pix[R] | g_2_pix[G] | b_2_pix[B]); + row3[0] = t; + row4[0] = t; +#ifndef SIXTYFOUR_BIT + row3[1] = t; + row4[1] = t; +#endif + row3 += ONE_TWO; + row4 += ONE_TWO; + } + lum += cols_2 + cols_2; + lum2 += cols_2 + cols_2; + + row1 += loffset; + row3 += loffset; + row2 += loffset; + row4 += loffset; + } +} |