diff options
Diffstat (limited to 'TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/24bit.cpp')
| -rw-r--r-- | TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/24bit.cpp | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/24bit.cpp b/TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/24bit.cpp new file mode 100644 index 00000000000..8b8c0ee03ed --- /dev/null +++ b/TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/24bit.cpp @@ -0,0 +1,218 @@ +/* $Id$ */ + +/* + * Copyright (c) 1992 The Regents of the University of California. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation for any purpose, without fee, and without written agreement is + * hereby granted, provided that the above copyright notice and the following + * two paragraphs appear in all copies of this software. + * + * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT + * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF + * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + */ + +#include "ace/OS.h" +#include <stdlib.h> +#include <string.h> +#include "video.h" +#include "dither.h" +#include "proto.h" + +ACE_RCSID(mpeg_client, 24bit, "$Id$") + +/* + * We'll define the "ConvertColor" macro here to do fixed point arithmetic + * that'll convert from YCrCb to RGB using: + * R = L + 1.40200*Cr; + * G = L - 0.34414*Cb - 0.71414*Cr + * B = L + 1.77200*Cb; + * + * We'll use fixed point by adding two extra bits after the decimal. + */ + +#define BITS 8 +#define ONE ((int) 1) +#define CONST_SCALE (ONE << BITS) +#define ROUND_FACTOR (ONE << (BITS-1)) + +/* Macro to convert integer to fixed. */ +#define UP(x) (((int)(x)) << BITS) + +/* Macro to convert fixed to integer (with rounding). */ +#define DOWN(x) (((x) + ROUND_FACTOR) >> BITS) + +/* Macro to convert a float to a fixed */ +#define FIX(x) ((int) ((x)*CONST_SCALE + 0.5)) + +#define CLAMP(ll,x,ul) ( ((x)<(ll)) ?(ll):( ((x)>(ul)) ?(ul):(x))) + +static int *Cb_r_tab, *Cr_g_tab, *Cb_g_tab, *Cr_b_tab; + +/* + *-------------------------------------------------------------- + * + * InitColorDither -- + * + * To get rid of the multiply and other conversions in color + * dither, we use a lookup table. + * + * Results: + * None. + * + * Side effects: + * The lookup tables are initialized. + * + *-------------------------------------------------------------- + */ + +void +InitColorDither() +{ + int CR, CB, i; + + Cr_b_tab = (int *)ACE_OS::malloc(256*sizeof(int)); + Cr_g_tab = (int *)ACE_OS::malloc(256*sizeof(int)); + Cb_g_tab = (int *)ACE_OS::malloc(256*sizeof(int)); + Cb_r_tab = (int *)ACE_OS::malloc(256*sizeof(int)); + + for (i=0; i<256; i++) { + CB = CR = i; + + CB -= 128; CR -= 128; + + Cb_r_tab[i] = FIX(1.40200) * CB; + Cr_g_tab[i] = -FIX(0.34414) * CR; + Cb_g_tab[i] = -FIX(0.71414) * CB; + Cr_b_tab[i] = FIX(1.77200) * CR; + } +} + + +/* + *-------------------------------------------------------------- + * + * ColorDitherImage -- + * + * Converts image into 24 bit color. + * + * Results: + * None. + * + * Side effects: + * None. + * + *-------------------------------------------------------------- + */ + +void +ColorDitherImage(unsigned char *lum, unsigned char *cr, + unsigned char *cb, unsigned char *out, + int rows, int cols) +{ + int L, CR, CB; + unsigned int *row1, *row2; + unsigned char *lum2; + int x, y; + unsigned int r, b, g; + int cb_r; + int cr_g; + int cb_g; + int cr_b; + + row1 = (unsigned int *)out; + row2 = row1 + cols; + lum2 = lum + cols; + for (y=0; y<rows; y+=2) { + for (x=0; x<cols; x+=2) { + int R, G, B; + + CR = *cr++; + CB = *cb++; + cb_r = Cb_r_tab[CB]; + cr_g = Cr_g_tab[CR]; + cb_g = Cb_g_tab[CB]; + cr_b = Cr_b_tab[CR]; + + L = *lum++; + L = UP(L); + R = L + cb_r; + G = L + cr_g + cb_g; + B = L + cr_b; +#ifndef LITTLE_ENDIAN + r = CLAMP(0,R,UP(255)) >> BITS; + g = CLAMP(0,G,UP(255)) & 0xff00; + b = (CLAMP(0,B,UP(255)) & 0xff00) << BITS; +#else + b = CLAMP(0,B,UP(255)) >> BITS; + g = CLAMP(0,G,UP(255)) & 0xff00; + r = (CLAMP(0,R,UP(255)) & 0xff00) << BITS; +#endif + *row1++ = r | g | b; + + L = *lum++; + L = UP(L); + R = L + cb_r; + G = L + cr_g + cb_g; + B = L + cr_b; +#ifndef LITTLE_ENDIAN + r = CLAMP(0,R,UP(255)) >> BITS; + g = CLAMP(0,G,UP(255)) & 0xff00; + b = (CLAMP(0,B,UP(255)) & 0xff00) << BITS; +#else + b = CLAMP(0,B,UP(255)) >> BITS; + g = CLAMP(0,G,UP(255)) & 0xff00; + r = (CLAMP(0,R,UP(255)) & 0xff00) << BITS; +#endif + *row1++ = r | g | b; + + /* + * Now, do second row. + */ + L = *lum2++; + L = UP(L); + R = L + cb_r; + G = L + cr_g + cb_g; + B = L + cr_b; +#ifndef LITTLE_ENDIAN + r = CLAMP(0,R,UP(255)) >> BITS; + g = CLAMP(0,G,UP(255)) & 0xff00; + b = (CLAMP(0,B,UP(255)) & 0xff00) << BITS; +#else + b = CLAMP(0,B,UP(255)) >> BITS; + g = CLAMP(0,G,UP(255)) & 0xff00; + r = (CLAMP(0,R,UP(255)) & 0xff00) << BITS; +#endif + *row2++ = r | g | b; + + L = *lum2++; + L = UP(L); + R = L + cb_r; + G = L + cr_g + cb_g; + B = L + cr_b; +#ifndef LITTLE_ENDIAN + r = CLAMP(0,R,UP(255)) >> BITS; + g = CLAMP(0,G,UP(255)) & 0xff00; + b = (CLAMP(0,B,UP(255)) & 0xff00) << BITS; +#else + b = CLAMP(0,B,UP(255)) >> BITS; + g = CLAMP(0,G,UP(255)) & 0xff00; + r = (CLAMP(0,R,UP(255)) & 0xff00) << BITS; +#endif + *row2++ = r | g | b; + } + lum += cols; + lum2 += cols; + row1 += cols; + row2 += cols; + } +} |