src/video/SDL_yuv_sw.c
author Sam Lantinga <slouken@libsdl.org>
Tue, 07 Feb 2006 09:29:18 +0000
changeset 1338 604d73db6802
parent 1336 3692456e7b0f
child 1358 c71e05b4dc2e
permissions -rw-r--r--
Removed uses of stdlib.h and string.h
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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/* This is the software implementation of the YUV video overlay support */
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/* This code was derived from code carrying the following copyright notices:
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 * Copyright (c) 1995 The Regents of the University of California.
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 * All rights reserved.
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 * 
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 * Permission to use, copy, modify, and distribute this software and its
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 * documentation for any purpose, without fee, and without written agreement is
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 * hereby granted, provided that the above copyright notice and the following
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 * two paragraphs appear in all copies of this software.
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 * 
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 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
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 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * 
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 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
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 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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 * Copyright (c) 1995 Erik Corry
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 * All rights reserved.
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 * 
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 * Permission to use, copy, modify, and distribute this software and its
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 * documentation for any purpose, without fee, and without written agreement is
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 * hereby granted, provided that the above copyright notice and the following
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 * two paragraphs appear in all copies of this software.
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 * 
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 * IN NO EVENT SHALL ERIK CORRY BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
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 * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
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 * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF ERIK CORRY HAS BEEN ADVISED
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
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 * 
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 * ERIK CORRY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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 * PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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 * BASIS, AND ERIK CORRY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
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 * UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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 * Portions of this software Copyright (c) 1995 Brown University.
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 * All rights reserved.
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 * 
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 * Permission to use, copy, modify, and distribute this software and its
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 * documentation for any purpose, without fee, and without written agreement
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 * is hereby granted, provided that the above copyright notice and the
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 * following two paragraphs appear in all copies of this software.
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 * 
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 * IN NO EVENT SHALL BROWN UNIVERSITY BE LIABLE TO ANY PARTY FOR
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 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
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 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF BROWN
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 * UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * 
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 * BROWN UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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 * PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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 * BASIS, AND BROWN UNIVERSITY HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
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 * SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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 */
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#include "SDL_stdlib.h"
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#include "SDL_string.h"
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#include "SDL_error.h"
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#include "SDL_video.h"
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#include "SDL_cpuinfo.h"
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#include "SDL_stretch_c.h"
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#include "SDL_yuvfuncs.h"
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#include "SDL_yuv_sw_c.h"
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/* The functions used to manipulate software video overlays */
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static struct private_yuvhwfuncs sw_yuvfuncs = {
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	SDL_LockYUV_SW,
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	SDL_UnlockYUV_SW,
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	SDL_DisplayYUV_SW,
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	SDL_FreeYUV_SW
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};
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/* RGB conversion lookup tables */
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struct private_yuvhwdata {
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	SDL_Surface *stretch;
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	SDL_Surface *display;
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	Uint8 *pixels;
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	int *colortab;
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	Uint32 *rgb_2_pix;
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	void (*Display1X)(int *colortab, Uint32 *rgb_2_pix,
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                          unsigned char *lum, unsigned char *cr,
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                          unsigned char *cb, unsigned char *out,
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                          int rows, int cols, int mod );
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	void (*Display2X)(int *colortab, Uint32 *rgb_2_pix,
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	                  unsigned char *lum, unsigned char *cr,
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                          unsigned char *cb, unsigned char *out,
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                          int rows, int cols, int mod );
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	/* These are just so we don't have to allocate them separately */
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	Uint16 pitches[3];
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	Uint8 *planes[3];
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};
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/* The colorspace conversion functions */
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extern void Color565DitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
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                                     unsigned char *lum, unsigned char *cr,
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                                     unsigned char *cb, unsigned char *out,
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                                     int rows, int cols, int mod );
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extern void ColorRGBDitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
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                                     unsigned char *lum, unsigned char *cr,
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                                     unsigned char *cb, unsigned char *out,
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                                     int rows, int cols, int mod );
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static void Color16DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix,
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                                    unsigned char *lum, unsigned char *cr,
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                                    unsigned char *cb, unsigned char *out,
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                                    int rows, int cols, int mod )
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{
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    unsigned short* row1;
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    unsigned short* row2;
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    unsigned char* lum2;
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    int x, y;
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    int cr_r;
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    int crb_g;
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    int cb_b;
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    int cols_2 = cols / 2;
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    row1 = (unsigned short*) out;
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    row2 = row1 + cols + mod;
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    lum2 = lum + cols;
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    mod += cols + mod;
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    y = rows / 2;
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    while( y-- )
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    {
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        x = cols_2;
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        while( x-- )
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        {
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            register int L;
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            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
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            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
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                               + colortab[ *cb + 2*256 ];
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            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
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            ++cr; ++cb;
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            L = *lum++;
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            *row1++ = (rgb_2_pix[ L + cr_r ] |
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                       rgb_2_pix[ L + crb_g ] |
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                       rgb_2_pix[ L + cb_b ]);
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            L = *lum++;
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            *row1++ = (rgb_2_pix[ L + cr_r ] |
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                       rgb_2_pix[ L + crb_g ] |
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                       rgb_2_pix[ L + cb_b ]);
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            /* Now, do second row.  */
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            L = *lum2++;
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            *row2++ = (rgb_2_pix[ L + cr_r ] |
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                       rgb_2_pix[ L + crb_g ] |
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                       rgb_2_pix[ L + cb_b ]);
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            L = *lum2++;
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            *row2++ = (rgb_2_pix[ L + cr_r ] |
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                       rgb_2_pix[ L + crb_g ] |
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                       rgb_2_pix[ L + cb_b ]);
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        }
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        /*
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         * These values are at the start of the next line, (due
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         * to the ++'s above),but they need to be at the start
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         * of the line after that.
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         */
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        lum  += cols;
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        lum2 += cols;
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        row1 += mod;
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        row2 += mod;
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    }
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}
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static void Color24DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix,
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                                    unsigned char *lum, unsigned char *cr,
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                                    unsigned char *cb, unsigned char *out,
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                                    int rows, int cols, int mod )
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{
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    unsigned int value;
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    unsigned char* row1;
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    unsigned char* row2;
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    unsigned char* lum2;
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    int x, y;
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    int cr_r;
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    int crb_g;
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    int cb_b;
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    int cols_2 = cols / 2;
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    row1 = out;
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    row2 = row1 + cols*3 + mod*3;
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    lum2 = lum + cols;
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    mod += cols + mod;
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    mod *= 3;
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    y = rows / 2;
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    while( y-- )
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    {
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        x = cols_2;
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        while( x-- )
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        {
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            register int L;
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            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
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            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
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                               + colortab[ *cb + 2*256 ];
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            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
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            ++cr; ++cb;
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            L = *lum++;
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            value = (rgb_2_pix[ L + cr_r ] |
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                     rgb_2_pix[ L + crb_g ] |
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                     rgb_2_pix[ L + cb_b ]);
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            *row1++ = (value      ) & 0xFF;
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            *row1++ = (value >>  8) & 0xFF;
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            *row1++ = (value >> 16) & 0xFF;
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            L = *lum++;
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            value = (rgb_2_pix[ L + cr_r ] |
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                     rgb_2_pix[ L + crb_g ] |
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                     rgb_2_pix[ L + cb_b ]);
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            *row1++ = (value      ) & 0xFF;
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            *row1++ = (value >>  8) & 0xFF;
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            *row1++ = (value >> 16) & 0xFF;
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            /* Now, do second row.  */
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            L = *lum2++;
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            value = (rgb_2_pix[ L + cr_r ] |
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                     rgb_2_pix[ L + crb_g ] |
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                     rgb_2_pix[ L + cb_b ]);
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            *row2++ = (value      ) & 0xFF;
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            *row2++ = (value >>  8) & 0xFF;
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            *row2++ = (value >> 16) & 0xFF;
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            L = *lum2++;
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            value = (rgb_2_pix[ L + cr_r ] |
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                     rgb_2_pix[ L + crb_g ] |
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                     rgb_2_pix[ L + cb_b ]);
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            *row2++ = (value      ) & 0xFF;
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            *row2++ = (value >>  8) & 0xFF;
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            *row2++ = (value >> 16) & 0xFF;
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        }
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        /*
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         * These values are at the start of the next line, (due
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         * to the ++'s above),but they need to be at the start
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         * of the line after that.
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         */
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        lum  += cols;
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        lum2 += cols;
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        row1 += mod;
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        row2 += mod;
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    }
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}
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static void Color32DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix,
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                                    unsigned char *lum, unsigned char *cr,
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                                    unsigned char *cb, unsigned char *out,
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                                    int rows, int cols, int mod )
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{
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    unsigned int* row1;
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    unsigned int* row2;
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    unsigned char* lum2;
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    int x, y;
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    int cr_r;
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    int crb_g;
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    int cb_b;
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    int cols_2 = cols / 2;
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    row1 = (unsigned int*) out;
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    row2 = row1 + cols + mod;
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    lum2 = lum + cols;
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    mod += cols + mod;
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    y = rows / 2;
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    while( y-- )
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    {
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        x = cols_2;
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        while( x-- )
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        {
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            register int L;
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            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
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            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
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                               + colortab[ *cb + 2*256 ];
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            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
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            ++cr; ++cb;
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            L = *lum++;
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            *row1++ = (rgb_2_pix[ L + cr_r ] |
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                       rgb_2_pix[ L + crb_g ] |
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                       rgb_2_pix[ L + cb_b ]);
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            L = *lum++;
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            *row1++ = (rgb_2_pix[ L + cr_r ] |
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                       rgb_2_pix[ L + crb_g ] |
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                       rgb_2_pix[ L + cb_b ]);
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            /* Now, do second row.  */
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            L = *lum2++;
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            *row2++ = (rgb_2_pix[ L + cr_r ] |
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                       rgb_2_pix[ L + crb_g ] |
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                       rgb_2_pix[ L + cb_b ]);
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            L = *lum2++;
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            *row2++ = (rgb_2_pix[ L + cr_r ] |
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                       rgb_2_pix[ L + crb_g ] |
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                       rgb_2_pix[ L + cb_b ]);
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        }
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        /*
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         * These values are at the start of the next line, (due
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         * to the ++'s above),but they need to be at the start
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         * of the line after that.
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         */
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        lum  += cols;
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        lum2 += cols;
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        row1 += mod;
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        row2 += mod;
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    }
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}
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/*
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 * In this function I make use of a nasty trick. The tables have the lower
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 * 16 bits replicated in the upper 16. This means I can write ints and get
slouken@0
   362
 * the horisontal doubling for free (almost).
slouken@0
   363
 */
slouken@0
   364
static void Color16DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix,
slouken@0
   365
                                    unsigned char *lum, unsigned char *cr,
slouken@0
   366
                                    unsigned char *cb, unsigned char *out,
slouken@0
   367
                                    int rows, int cols, int mod )
slouken@0
   368
{
slouken@0
   369
    unsigned int* row1 = (unsigned int*) out;
slouken@0
   370
    const int next_row = cols+(mod/2);
slouken@0
   371
    unsigned int* row2 = row1 + 2*next_row;
slouken@0
   372
    unsigned char* lum2;
slouken@0
   373
    int x, y;
slouken@0
   374
    int cr_r;
slouken@0
   375
    int crb_g;
slouken@0
   376
    int cb_b;
slouken@0
   377
    int cols_2 = cols / 2;
slouken@0
   378
slouken@0
   379
    lum2 = lum + cols;
slouken@0
   380
slouken@0
   381
    mod = (next_row * 3) + (mod/2);
slouken@0
   382
slouken@0
   383
    y = rows / 2;
slouken@0
   384
    while( y-- )
slouken@0
   385
    {
slouken@0
   386
        x = cols_2;
slouken@0
   387
        while( x-- )
slouken@0
   388
        {
slouken@0
   389
            register int L;
slouken@0
   390
slouken@0
   391
            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
slouken@0
   392
            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
slouken@0
   393
                               + colortab[ *cb + 2*256 ];
slouken@0
   394
            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
slouken@0
   395
            ++cr; ++cb;
slouken@0
   396
slouken@0
   397
            L = *lum++;
slouken@0
   398
            row1[0] = row1[next_row] = (rgb_2_pix[ L + cr_r ] |
slouken@0
   399
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   400
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   401
            row1++;
slouken@0
   402
slouken@0
   403
            L = *lum++;
slouken@0
   404
            row1[0] = row1[next_row] = (rgb_2_pix[ L + cr_r ] |
slouken@0
   405
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   406
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   407
            row1++;
slouken@0
   408
slouken@0
   409
slouken@0
   410
            /* Now, do second row. */
slouken@0
   411
slouken@0
   412
            L = *lum2++;
slouken@0
   413
            row2[0] = row2[next_row] = (rgb_2_pix[ L + cr_r ] |
slouken@0
   414
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   415
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   416
            row2++;
slouken@0
   417
slouken@0
   418
            L = *lum2++;
slouken@0
   419
            row2[0] = row2[next_row] = (rgb_2_pix[ L + cr_r ] |
slouken@0
   420
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   421
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   422
            row2++;
slouken@0
   423
        }
slouken@0
   424
slouken@0
   425
        /*
slouken@0
   426
         * These values are at the start of the next line, (due
slouken@0
   427
         * to the ++'s above),but they need to be at the start
slouken@0
   428
         * of the line after that.
slouken@0
   429
         */
slouken@0
   430
        lum  += cols;
slouken@0
   431
        lum2 += cols;
slouken@0
   432
        row1 += mod;
slouken@0
   433
        row2 += mod;
slouken@0
   434
    }
slouken@0
   435
}
slouken@0
   436
slouken@0
   437
static void Color24DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix,
slouken@0
   438
                                    unsigned char *lum, unsigned char *cr,
slouken@0
   439
                                    unsigned char *cb, unsigned char *out,
slouken@0
   440
                                    int rows, int cols, int mod )
slouken@0
   441
{
slouken@0
   442
    unsigned int value;
slouken@0
   443
    unsigned char* row1 = out;
slouken@0
   444
    const int next_row = (cols*2 + mod) * 3;
slouken@0
   445
    unsigned char* row2 = row1 + 2*next_row;
slouken@0
   446
    unsigned char* lum2;
slouken@0
   447
    int x, y;
slouken@0
   448
    int cr_r;
slouken@0
   449
    int crb_g;
slouken@0
   450
    int cb_b;
slouken@0
   451
    int cols_2 = cols / 2;
slouken@0
   452
slouken@0
   453
    lum2 = lum + cols;
slouken@0
   454
slouken@0
   455
    mod = next_row*3 + mod*3;
slouken@0
   456
slouken@0
   457
    y = rows / 2;
slouken@0
   458
    while( y-- )
slouken@0
   459
    {
slouken@0
   460
        x = cols_2;
slouken@0
   461
        while( x-- )
slouken@0
   462
        {
slouken@0
   463
            register int L;
slouken@0
   464
slouken@0
   465
            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
slouken@0
   466
            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
slouken@0
   467
                               + colortab[ *cb + 2*256 ];
slouken@0
   468
            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
slouken@0
   469
            ++cr; ++cb;
slouken@0
   470
slouken@0
   471
            L = *lum++;
slouken@0
   472
            value = (rgb_2_pix[ L + cr_r ] |
slouken@0
   473
                     rgb_2_pix[ L + crb_g ] |
slouken@0
   474
                     rgb_2_pix[ L + cb_b ]);
slouken@0
   475
            row1[0+0] = row1[3+0] = row1[next_row+0] = row1[next_row+3+0] =
slouken@0
   476
                     (value      ) & 0xFF;
slouken@0
   477
            row1[0+1] = row1[3+1] = row1[next_row+1] = row1[next_row+3+1] =
slouken@0
   478
                     (value >>  8) & 0xFF;
slouken@0
   479
            row1[0+2] = row1[3+2] = row1[next_row+2] = row1[next_row+3+2] =
slouken@0
   480
                     (value >> 16) & 0xFF;
slouken@0
   481
            row1 += 2*3;
slouken@0
   482
slouken@0
   483
            L = *lum++;
slouken@0
   484
            value = (rgb_2_pix[ L + cr_r ] |
slouken@0
   485
                     rgb_2_pix[ L + crb_g ] |
slouken@0
   486
                     rgb_2_pix[ L + cb_b ]);
slouken@0
   487
            row1[0+0] = row1[3+0] = row1[next_row+0] = row1[next_row+3+0] =
slouken@0
   488
                     (value      ) & 0xFF;
slouken@0
   489
            row1[0+1] = row1[3+1] = row1[next_row+1] = row1[next_row+3+1] =
slouken@0
   490
                     (value >>  8) & 0xFF;
slouken@0
   491
            row1[0+2] = row1[3+2] = row1[next_row+2] = row1[next_row+3+2] =
slouken@0
   492
                     (value >> 16) & 0xFF;
slouken@0
   493
            row1 += 2*3;
slouken@0
   494
slouken@0
   495
slouken@0
   496
            /* Now, do second row. */
slouken@0
   497
slouken@0
   498
            L = *lum2++;
slouken@0
   499
            value = (rgb_2_pix[ L + cr_r ] |
slouken@0
   500
                     rgb_2_pix[ L + crb_g ] |
slouken@0
   501
                     rgb_2_pix[ L + cb_b ]);
slouken@0
   502
            row2[0+0] = row2[3+0] = row2[next_row+0] = row2[next_row+3+0] =
slouken@0
   503
                     (value      ) & 0xFF;
slouken@0
   504
            row2[0+1] = row2[3+1] = row2[next_row+1] = row2[next_row+3+1] =
slouken@0
   505
                     (value >>  8) & 0xFF;
slouken@0
   506
            row2[0+2] = row2[3+2] = row2[next_row+2] = row2[next_row+3+2] =
slouken@0
   507
                     (value >> 16) & 0xFF;
slouken@0
   508
            row2 += 2*3;
slouken@0
   509
slouken@0
   510
            L = *lum2++;
slouken@0
   511
            value = (rgb_2_pix[ L + cr_r ] |
slouken@0
   512
                     rgb_2_pix[ L + crb_g ] |
slouken@0
   513
                     rgb_2_pix[ L + cb_b ]);
slouken@0
   514
            row2[0+0] = row2[3+0] = row2[next_row+0] = row2[next_row+3+0] =
slouken@0
   515
                     (value      ) & 0xFF;
slouken@0
   516
            row2[0+1] = row2[3+1] = row2[next_row+1] = row2[next_row+3+1] =
slouken@0
   517
                     (value >>  8) & 0xFF;
slouken@0
   518
            row2[0+2] = row2[3+2] = row2[next_row+2] = row2[next_row+3+2] =
slouken@0
   519
                     (value >> 16) & 0xFF;
slouken@0
   520
            row2 += 2*3;
slouken@0
   521
        }
slouken@0
   522
slouken@0
   523
        /*
slouken@0
   524
         * These values are at the start of the next line, (due
slouken@0
   525
         * to the ++'s above),but they need to be at the start
slouken@0
   526
         * of the line after that.
slouken@0
   527
         */
slouken@0
   528
        lum  += cols;
slouken@0
   529
        lum2 += cols;
slouken@0
   530
        row1 += mod;
slouken@0
   531
        row2 += mod;
slouken@0
   532
    }
slouken@0
   533
}
slouken@0
   534
slouken@0
   535
static void Color32DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix,
slouken@0
   536
                                    unsigned char *lum, unsigned char *cr,
slouken@0
   537
                                    unsigned char *cb, unsigned char *out,
slouken@0
   538
                                    int rows, int cols, int mod )
slouken@0
   539
{
slouken@0
   540
    unsigned int* row1 = (unsigned int*) out;
slouken@0
   541
    const int next_row = cols*2+mod;
slouken@0
   542
    unsigned int* row2 = row1 + 2*next_row;
slouken@0
   543
    unsigned char* lum2;
slouken@0
   544
    int x, y;
slouken@0
   545
    int cr_r;
slouken@0
   546
    int crb_g;
slouken@0
   547
    int cb_b;
slouken@0
   548
    int cols_2 = cols / 2;
slouken@0
   549
slouken@0
   550
    lum2 = lum + cols;
slouken@0
   551
slouken@0
   552
    mod = (next_row * 3) + mod;
slouken@0
   553
slouken@0
   554
    y = rows / 2;
slouken@0
   555
    while( y-- )
slouken@0
   556
    {
slouken@0
   557
        x = cols_2;
slouken@0
   558
        while( x-- )
slouken@0
   559
        {
slouken@0
   560
            register int L;
slouken@0
   561
slouken@0
   562
            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
slouken@0
   563
            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
slouken@0
   564
                               + colortab[ *cb + 2*256 ];
slouken@0
   565
            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
slouken@0
   566
            ++cr; ++cb;
slouken@0
   567
slouken@0
   568
            L = *lum++;
slouken@0
   569
            row1[0] = row1[1] = row1[next_row] = row1[next_row+1] =
slouken@0
   570
                                       (rgb_2_pix[ L + cr_r ] |
slouken@0
   571
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   572
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   573
            row1 += 2;
slouken@0
   574
slouken@0
   575
            L = *lum++;
slouken@0
   576
            row1[0] = row1[1] = row1[next_row] = row1[next_row+1] =
slouken@0
   577
                                       (rgb_2_pix[ L + cr_r ] |
slouken@0
   578
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   579
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   580
            row1 += 2;
slouken@0
   581
slouken@0
   582
slouken@0
   583
            /* Now, do second row. */
slouken@0
   584
slouken@0
   585
            L = *lum2++;
slouken@0
   586
            row2[0] = row2[1] = row2[next_row] = row2[next_row+1] =
slouken@0
   587
                                       (rgb_2_pix[ L + cr_r ] |
slouken@0
   588
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   589
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   590
            row2 += 2;
slouken@0
   591
slouken@0
   592
            L = *lum2++;
slouken@0
   593
            row2[0] = row2[1] = row2[next_row] = row2[next_row+1] =
slouken@0
   594
                                       (rgb_2_pix[ L + cr_r ] |
slouken@0
   595
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   596
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   597
            row2 += 2;
slouken@0
   598
        }
slouken@0
   599
slouken@0
   600
        /*
slouken@0
   601
         * These values are at the start of the next line, (due
slouken@0
   602
         * to the ++'s above),but they need to be at the start
slouken@0
   603
         * of the line after that.
slouken@0
   604
         */
slouken@0
   605
        lum  += cols;
slouken@0
   606
        lum2 += cols;
slouken@0
   607
        row1 += mod;
slouken@0
   608
        row2 += mod;
slouken@0
   609
    }
slouken@0
   610
}
slouken@0
   611
slouken@0
   612
static void Color16DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix,
slouken@0
   613
                                    unsigned char *lum, unsigned char *cr,
slouken@0
   614
                                    unsigned char *cb, unsigned char *out,
slouken@0
   615
                                    int rows, int cols, int mod )
slouken@0
   616
{
slouken@0
   617
    unsigned short* row;
slouken@0
   618
    int x, y;
slouken@0
   619
    int cr_r;
slouken@0
   620
    int crb_g;
slouken@0
   621
    int cb_b;
slouken@0
   622
    int cols_2 = cols / 2;
slouken@0
   623
slouken@0
   624
    row = (unsigned short*) out;
slouken@0
   625
slouken@0
   626
    y = rows;
slouken@0
   627
    while( y-- )
slouken@0
   628
    {
slouken@0
   629
        x = cols_2;
slouken@0
   630
        while( x-- )
slouken@0
   631
        {
slouken@0
   632
            register int L;
slouken@0
   633
slouken@0
   634
            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
slouken@0
   635
            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
slouken@0
   636
                               + colortab[ *cb + 2*256 ];
slouken@0
   637
            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
slouken@0
   638
            cr += 4; cb += 4;
slouken@0
   639
slouken@0
   640
            L = *lum; lum += 2;
slouken@0
   641
            *row++ = (rgb_2_pix[ L + cr_r ] |
slouken@0
   642
                       rgb_2_pix[ L + crb_g ] |
slouken@0
   643
                       rgb_2_pix[ L + cb_b ]);
slouken@0
   644
slouken@0
   645
            L = *lum; lum += 2;
slouken@0
   646
            *row++ = (rgb_2_pix[ L + cr_r ] |
slouken@0
   647
                       rgb_2_pix[ L + crb_g ] |
slouken@0
   648
                       rgb_2_pix[ L + cb_b ]);
slouken@0
   649
slouken@0
   650
        }
slouken@0
   651
slouken@0
   652
        row += mod;
slouken@0
   653
    }
slouken@0
   654
}
slouken@0
   655
slouken@0
   656
static void Color24DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix,
slouken@0
   657
                                    unsigned char *lum, unsigned char *cr,
slouken@0
   658
                                    unsigned char *cb, unsigned char *out,
slouken@0
   659
                                    int rows, int cols, int mod )
slouken@0
   660
{
slouken@0
   661
    unsigned int value;
slouken@0
   662
    unsigned char* row;
slouken@0
   663
    int x, y;
slouken@0
   664
    int cr_r;
slouken@0
   665
    int crb_g;
slouken@0
   666
    int cb_b;
slouken@0
   667
    int cols_2 = cols / 2;
slouken@0
   668
slouken@0
   669
    row = (unsigned char*) out;
slouken@0
   670
    mod *= 3;
slouken@0
   671
    y = rows;
slouken@0
   672
    while( y-- )
slouken@0
   673
    {
slouken@0
   674
        x = cols_2;
slouken@0
   675
        while( x-- )
slouken@0
   676
        {
slouken@0
   677
            register int L;
slouken@0
   678
slouken@0
   679
            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
slouken@0
   680
            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
slouken@0
   681
                               + colortab[ *cb + 2*256 ];
slouken@0
   682
            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
slouken@0
   683
            cr += 4; cb += 4;
slouken@0
   684
slouken@0
   685
            L = *lum; lum += 2;
slouken@0
   686
            value = (rgb_2_pix[ L + cr_r ] |
slouken@0
   687
                     rgb_2_pix[ L + crb_g ] |
slouken@0
   688
                     rgb_2_pix[ L + cb_b ]);
slouken@0
   689
            *row++ = (value      ) & 0xFF;
slouken@0
   690
            *row++ = (value >>  8) & 0xFF;
slouken@0
   691
            *row++ = (value >> 16) & 0xFF;
slouken@0
   692
slouken@0
   693
            L = *lum; lum += 2;
slouken@0
   694
            value = (rgb_2_pix[ L + cr_r ] |
slouken@0
   695
                     rgb_2_pix[ L + crb_g ] |
slouken@0
   696
                     rgb_2_pix[ L + cb_b ]);
slouken@0
   697
            *row++ = (value      ) & 0xFF;
slouken@0
   698
            *row++ = (value >>  8) & 0xFF;
slouken@0
   699
            *row++ = (value >> 16) & 0xFF;
slouken@0
   700
slouken@0
   701
        }
slouken@0
   702
        row += mod;
slouken@0
   703
    }
slouken@0
   704
}
slouken@0
   705
slouken@0
   706
static void Color32DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix,
slouken@0
   707
                                    unsigned char *lum, unsigned char *cr,
slouken@0
   708
                                    unsigned char *cb, unsigned char *out,
slouken@0
   709
                                    int rows, int cols, int mod )
slouken@0
   710
{
slouken@0
   711
    unsigned int* row;
slouken@0
   712
    int x, y;
slouken@0
   713
    int cr_r;
slouken@0
   714
    int crb_g;
slouken@0
   715
    int cb_b;
slouken@0
   716
    int cols_2 = cols / 2;
slouken@0
   717
slouken@0
   718
    row = (unsigned int*) out;
slouken@0
   719
    y = rows;
slouken@0
   720
    while( y-- )
slouken@0
   721
    {
slouken@0
   722
        x = cols_2;
slouken@0
   723
        while( x-- )
slouken@0
   724
        {
slouken@0
   725
            register int L;
slouken@0
   726
slouken@0
   727
            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
slouken@0
   728
            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
slouken@0
   729
                               + colortab[ *cb + 2*256 ];
slouken@0
   730
            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
slouken@0
   731
            cr += 4; cb += 4;
slouken@0
   732
slouken@0
   733
            L = *lum; lum += 2;
slouken@0
   734
            *row++ = (rgb_2_pix[ L + cr_r ] |
slouken@0
   735
                       rgb_2_pix[ L + crb_g ] |
slouken@0
   736
                       rgb_2_pix[ L + cb_b ]);
slouken@0
   737
slouken@0
   738
            L = *lum; lum += 2;
slouken@0
   739
            *row++ = (rgb_2_pix[ L + cr_r ] |
slouken@0
   740
                       rgb_2_pix[ L + crb_g ] |
slouken@0
   741
                       rgb_2_pix[ L + cb_b ]);
slouken@0
   742
slouken@0
   743
slouken@0
   744
        }
slouken@0
   745
        row += mod;
slouken@0
   746
    }
slouken@0
   747
}
slouken@0
   748
slouken@0
   749
/*
slouken@0
   750
 * In this function I make use of a nasty trick. The tables have the lower
slouken@0
   751
 * 16 bits replicated in the upper 16. This means I can write ints and get
slouken@0
   752
 * the horisontal doubling for free (almost).
slouken@0
   753
 */
slouken@0
   754
static void Color16DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix,
slouken@0
   755
                                    unsigned char *lum, unsigned char *cr,
slouken@0
   756
                                    unsigned char *cb, unsigned char *out,
slouken@0
   757
                                    int rows, int cols, int mod )
slouken@0
   758
{
slouken@0
   759
    unsigned int* row = (unsigned int*) out;
slouken@0
   760
    const int next_row = cols+(mod/2);
slouken@0
   761
    int x, y;
slouken@0
   762
    int cr_r;
slouken@0
   763
    int crb_g;
slouken@0
   764
    int cb_b;
slouken@0
   765
    int cols_2 = cols / 2;
slouken@0
   766
slouken@0
   767
    y = rows;
slouken@0
   768
    while( y-- )
slouken@0
   769
    {
slouken@0
   770
        x = cols_2;
slouken@0
   771
        while( x-- )
slouken@0
   772
        {
slouken@0
   773
            register int L;
slouken@0
   774
slouken@0
   775
            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
slouken@0
   776
            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
slouken@0
   777
                               + colortab[ *cb + 2*256 ];
slouken@0
   778
            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
slouken@0
   779
            cr += 4; cb += 4;
slouken@0
   780
slouken@0
   781
            L = *lum; lum += 2;
slouken@0
   782
            row[0] = row[next_row] = (rgb_2_pix[ L + cr_r ] |
slouken@0
   783
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   784
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   785
            row++;
slouken@0
   786
slouken@0
   787
            L = *lum; lum += 2;
slouken@0
   788
            row[0] = row[next_row] = (rgb_2_pix[ L + cr_r ] |
slouken@0
   789
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   790
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   791
            row++;
slouken@0
   792
slouken@0
   793
        }
slouken@0
   794
        row += next_row;
slouken@0
   795
    }
slouken@0
   796
}
slouken@0
   797
slouken@0
   798
static void Color24DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix,
slouken@0
   799
                                    unsigned char *lum, unsigned char *cr,
slouken@0
   800
                                    unsigned char *cb, unsigned char *out,
slouken@0
   801
                                    int rows, int cols, int mod )
slouken@0
   802
{
slouken@0
   803
    unsigned int value;
slouken@0
   804
    unsigned char* row = out;
slouken@0
   805
    const int next_row = (cols*2 + mod) * 3;
slouken@0
   806
    int x, y;
slouken@0
   807
    int cr_r;
slouken@0
   808
    int crb_g;
slouken@0
   809
    int cb_b;
slouken@0
   810
    int cols_2 = cols / 2;
slouken@0
   811
    y = rows;
slouken@0
   812
    while( y-- )
slouken@0
   813
    {
slouken@0
   814
        x = cols_2;
slouken@0
   815
        while( x-- )
slouken@0
   816
        {
slouken@0
   817
            register int L;
slouken@0
   818
slouken@0
   819
            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
slouken@0
   820
            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
slouken@0
   821
                               + colortab[ *cb + 2*256 ];
slouken@0
   822
            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
slouken@0
   823
            cr += 4; cb += 4;
slouken@0
   824
slouken@0
   825
            L = *lum; lum += 2;
slouken@0
   826
            value = (rgb_2_pix[ L + cr_r ] |
slouken@0
   827
                     rgb_2_pix[ L + crb_g ] |
slouken@0
   828
                     rgb_2_pix[ L + cb_b ]);
slouken@0
   829
            row[0+0] = row[3+0] = row[next_row+0] = row[next_row+3+0] =
slouken@0
   830
                     (value      ) & 0xFF;
slouken@0
   831
            row[0+1] = row[3+1] = row[next_row+1] = row[next_row+3+1] =
slouken@0
   832
                     (value >>  8) & 0xFF;
slouken@0
   833
            row[0+2] = row[3+2] = row[next_row+2] = row[next_row+3+2] =
slouken@0
   834
                     (value >> 16) & 0xFF;
slouken@0
   835
            row += 2*3;
slouken@0
   836
slouken@0
   837
            L = *lum; lum += 2;
slouken@0
   838
            value = (rgb_2_pix[ L + cr_r ] |
slouken@0
   839
                     rgb_2_pix[ L + crb_g ] |
slouken@0
   840
                     rgb_2_pix[ L + cb_b ]);
slouken@0
   841
            row[0+0] = row[3+0] = row[next_row+0] = row[next_row+3+0] =
slouken@0
   842
                     (value      ) & 0xFF;
slouken@0
   843
            row[0+1] = row[3+1] = row[next_row+1] = row[next_row+3+1] =
slouken@0
   844
                     (value >>  8) & 0xFF;
slouken@0
   845
            row[0+2] = row[3+2] = row[next_row+2] = row[next_row+3+2] =
slouken@0
   846
                     (value >> 16) & 0xFF;
slouken@0
   847
            row += 2*3;
slouken@0
   848
slouken@0
   849
        }
slouken@0
   850
        row += next_row;
slouken@0
   851
    }
slouken@0
   852
}
slouken@0
   853
slouken@0
   854
static void Color32DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix,
slouken@0
   855
                                    unsigned char *lum, unsigned char *cr,
slouken@0
   856
                                    unsigned char *cb, unsigned char *out,
slouken@0
   857
                                    int rows, int cols, int mod )
slouken@0
   858
{
slouken@0
   859
    unsigned int* row = (unsigned int*) out;
slouken@0
   860
    const int next_row = cols*2+mod;
slouken@0
   861
    int x, y;
slouken@0
   862
    int cr_r;
slouken@0
   863
    int crb_g;
slouken@0
   864
    int cb_b;
slouken@0
   865
    int cols_2 = cols / 2;
slouken@0
   866
    mod+=mod;
slouken@0
   867
    y = rows;
slouken@0
   868
    while( y-- )
slouken@0
   869
    {
slouken@0
   870
        x = cols_2;
slouken@0
   871
        while( x-- )
slouken@0
   872
        {
slouken@0
   873
            register int L;
slouken@0
   874
slouken@0
   875
            cr_r   = 0*768+256 + colortab[ *cr + 0*256 ];
slouken@0
   876
            crb_g  = 1*768+256 + colortab[ *cr + 1*256 ]
slouken@0
   877
                               + colortab[ *cb + 2*256 ];
slouken@0
   878
            cb_b   = 2*768+256 + colortab[ *cb + 3*256 ];
slouken@0
   879
            cr += 4; cb += 4;
slouken@0
   880
slouken@0
   881
            L = *lum; lum += 2;
slouken@0
   882
            row[0] = row[1] = row[next_row] = row[next_row+1] =
slouken@0
   883
                                       (rgb_2_pix[ L + cr_r ] |
slouken@0
   884
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   885
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   886
            row += 2;
slouken@0
   887
slouken@0
   888
            L = *lum; lum += 2;
slouken@0
   889
            row[0] = row[1] = row[next_row] = row[next_row+1] =
slouken@0
   890
                                       (rgb_2_pix[ L + cr_r ] |
slouken@0
   891
                                        rgb_2_pix[ L + crb_g ] |
slouken@0
   892
                                        rgb_2_pix[ L + cb_b ]);
slouken@0
   893
            row += 2;
slouken@0
   894
slouken@0
   895
slouken@0
   896
        }
slouken@0
   897
slouken@0
   898
        row += next_row;
slouken@0
   899
    }
slouken@0
   900
}
slouken@0
   901
slouken@0
   902
/*
slouken@0
   903
 * How many 1 bits are there in the Uint32.
slouken@0
   904
 * Low performance, do not call often.
slouken@0
   905
 */
slouken@0
   906
static int number_of_bits_set( Uint32 a )
slouken@0
   907
{
slouken@0
   908
    if(!a) return 0;
slouken@0
   909
    if(a & 1) return 1 + number_of_bits_set(a >> 1);
slouken@0
   910
    return(number_of_bits_set(a >> 1));
slouken@0
   911
}
slouken@0
   912
slouken@0
   913
/*
slouken@0
   914
 * How many 0 bits are there at least significant end of Uint32.
slouken@0
   915
 * Low performance, do not call often.
slouken@0
   916
 */
slouken@0
   917
static int free_bits_at_bottom( Uint32 a )
slouken@0
   918
{
slouken@0
   919
      /* assume char is 8 bits */
slouken@0
   920
    if(!a) return sizeof(Uint32) * 8;
slouken@0
   921
    if(((Sint32)a) & 1l) return 0;
slouken@0
   922
    return 1 + free_bits_at_bottom ( a >> 1);
slouken@0
   923
}
slouken@0
   924
slouken@0
   925
slouken@0
   926
SDL_Overlay *SDL_CreateYUV_SW(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
slouken@0
   927
{
slouken@0
   928
	SDL_Overlay *overlay;
slouken@0
   929
	struct private_yuvhwdata *swdata;
slouken@0
   930
	int *Cr_r_tab;
slouken@0
   931
	int *Cr_g_tab;
slouken@0
   932
	int *Cb_g_tab;
slouken@0
   933
	int *Cb_b_tab;
slouken@0
   934
	Uint32 *r_2_pix_alloc;
slouken@0
   935
	Uint32 *g_2_pix_alloc;
slouken@0
   936
	Uint32 *b_2_pix_alloc;
slouken@739
   937
	int i;
slouken@0
   938
	int CR, CB;
slouken@0
   939
	Uint32 Rmask, Gmask, Bmask;
slouken@0
   940
slouken@0
   941
	/* Only RGB packed pixel conversion supported */
slouken@0
   942
	if ( (display->format->BytesPerPixel != 2) &&
slouken@0
   943
	     (display->format->BytesPerPixel != 3) &&
slouken@0
   944
	     (display->format->BytesPerPixel != 4) ) {
slouken@0
   945
		SDL_SetError("Can't use YUV data on non 16/24/32 bit surfaces");
slouken@0
   946
		return(NULL);
slouken@0
   947
	}
slouken@0
   948
slouken@0
   949
	/* Verify that we support the format */
slouken@0
   950
	switch (format) {
slouken@0
   951
	    case SDL_YV12_OVERLAY:
slouken@0
   952
	    case SDL_IYUV_OVERLAY:
slouken@0
   953
	    case SDL_YUY2_OVERLAY:
slouken@0
   954
	    case SDL_UYVY_OVERLAY:
slouken@0
   955
	    case SDL_YVYU_OVERLAY:
slouken@0
   956
		break;
slouken@0
   957
	    default:
slouken@0
   958
		SDL_SetError("Unsupported YUV format");
slouken@0
   959
		return(NULL);
slouken@0
   960
	}
slouken@0
   961
slouken@0
   962
	/* Create the overlay structure */
slouken@1336
   963
	overlay = (SDL_Overlay *)SDL_malloc(sizeof *overlay);
slouken@0
   964
	if ( overlay == NULL ) {
slouken@0
   965
		SDL_OutOfMemory();
slouken@0
   966
		return(NULL);
slouken@0
   967
	}
slouken@1336
   968
	SDL_memset(overlay, 0, (sizeof *overlay));
slouken@0
   969
slouken@0
   970
	/* Fill in the basic members */
slouken@0
   971
	overlay->format = format;
slouken@0
   972
	overlay->w = width;
slouken@0
   973
	overlay->h = height;
slouken@0
   974
slouken@0
   975
	/* Set up the YUV surface function structure */
slouken@0
   976
	overlay->hwfuncs = &sw_yuvfuncs;
slouken@0
   977
slouken@0
   978
	/* Create the pixel data and lookup tables */
slouken@1336
   979
	swdata = (struct private_yuvhwdata *)SDL_malloc(sizeof *swdata);
slouken@0
   980
	overlay->hwdata = swdata;
slouken@0
   981
	if ( swdata == NULL ) {
slouken@0
   982
		SDL_OutOfMemory();
slouken@0
   983
		SDL_FreeYUVOverlay(overlay);
slouken@0
   984
		return(NULL);
slouken@0
   985
	}
slouken@0
   986
	swdata->stretch = NULL;
slouken@0
   987
	swdata->display = display;
slouken@1336
   988
	swdata->pixels = (Uint8 *) SDL_malloc(width*height*2);
slouken@1336
   989
	swdata->colortab = (int *)SDL_malloc(4*256*sizeof(int));
slouken@0
   990
	Cr_r_tab = &swdata->colortab[0*256];
slouken@0
   991
	Cr_g_tab = &swdata->colortab[1*256];
slouken@0
   992
	Cb_g_tab = &swdata->colortab[2*256];
slouken@0
   993
	Cb_b_tab = &swdata->colortab[3*256];
slouken@1336
   994
	swdata->rgb_2_pix = (Uint32 *)SDL_malloc(3*768*sizeof(Uint32));
slouken@0
   995
	r_2_pix_alloc = &swdata->rgb_2_pix[0*768];
slouken@0
   996
	g_2_pix_alloc = &swdata->rgb_2_pix[1*768];
slouken@0
   997
	b_2_pix_alloc = &swdata->rgb_2_pix[2*768];
slouken@0
   998
	if ( ! swdata->pixels || ! swdata->colortab || ! swdata->rgb_2_pix ) {
slouken@0
   999
		SDL_OutOfMemory();
slouken@0
  1000
		SDL_FreeYUVOverlay(overlay);
slouken@0
  1001
		return(NULL);
slouken@0
  1002
	}
slouken@0
  1003
slouken@0
  1004
	/* Generate the tables for the display surface */
slouken@0
  1005
	for (i=0; i<256; i++) {
slouken@0
  1006
		/* Gamma correction (luminescence table) and chroma correction
slouken@0
  1007
		   would be done here.  See the Berkeley mpeg_play sources.
slouken@0
  1008
		*/
slouken@0
  1009
		CB = CR = (i-128);
slouken@0
  1010
		Cr_r_tab[i] = (int) ( (0.419/0.299) * CR);
slouken@0
  1011
		Cr_g_tab[i] = (int) (-(0.299/0.419) * CR);
slouken@0
  1012
		Cb_g_tab[i] = (int) (-(0.114/0.331) * CB); 
slouken@0
  1013
		Cb_b_tab[i] = (int) ( (0.587/0.331) * CB);
slouken@0
  1014
	}
slouken@0
  1015
slouken@0
  1016
	/* 
slouken@0
  1017
	 * Set up entries 0-255 in rgb-to-pixel value tables.
slouken@0
  1018
	 */
slouken@0
  1019
	Rmask = display->format->Rmask;
slouken@0
  1020
	Gmask = display->format->Gmask;
slouken@0
  1021
	Bmask = display->format->Bmask;
slouken@0
  1022
	for ( i=0; i<256; ++i ) {
slouken@0
  1023
		r_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Rmask));
slouken@0
  1024
		r_2_pix_alloc[i+256] <<= free_bits_at_bottom(Rmask);
slouken@0
  1025
		g_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Gmask));
slouken@0
  1026
		g_2_pix_alloc[i+256] <<= free_bits_at_bottom(Gmask);
slouken@0
  1027
		b_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Bmask));
slouken@0
  1028
		b_2_pix_alloc[i+256] <<= free_bits_at_bottom(Bmask);
slouken@0
  1029
	}
slouken@0
  1030
slouken@0
  1031
	/*
slouken@0
  1032
	 * If we have 16-bit output depth, then we double the value
slouken@0
  1033
	 * in the top word. This means that we can write out both
slouken@0
  1034
	 * pixels in the pixel doubling mode with one op. It is 
slouken@0
  1035
	 * harmless in the normal case as storing a 32-bit value
slouken@0
  1036
	 * through a short pointer will lose the top bits anyway.
slouken@0
  1037
	 */
slouken@0
  1038
	if( display->format->BytesPerPixel == 2 ) {
slouken@0
  1039
		for ( i=0; i<256; ++i ) {
slouken@0
  1040
			r_2_pix_alloc[i+256] |= (r_2_pix_alloc[i+256]) << 16;
slouken@0
  1041
			g_2_pix_alloc[i+256] |= (g_2_pix_alloc[i+256]) << 16;
slouken@0
  1042
			b_2_pix_alloc[i+256] |= (b_2_pix_alloc[i+256]) << 16;
slouken@0
  1043
		}
slouken@0
  1044
	}
slouken@0
  1045
slouken@0
  1046
	/*
slouken@0
  1047
	 * Spread out the values we have to the rest of the array so that
slouken@0
  1048
	 * we do not need to check for overflow.
slouken@0
  1049
	 */
slouken@0
  1050
	for ( i=0; i<256; ++i ) {
slouken@0
  1051
		r_2_pix_alloc[i] = r_2_pix_alloc[256];
slouken@0
  1052
		r_2_pix_alloc[i+512] = r_2_pix_alloc[511];
slouken@0
  1053
		g_2_pix_alloc[i] = g_2_pix_alloc[256];
slouken@0
  1054
		g_2_pix_alloc[i+512] = g_2_pix_alloc[511];
slouken@0
  1055
		b_2_pix_alloc[i] = b_2_pix_alloc[256];
slouken@0
  1056
		b_2_pix_alloc[i+512] = b_2_pix_alloc[511];
slouken@0
  1057
	}
slouken@0
  1058
slouken@0
  1059
	/* You have chosen wisely... */
slouken@0
  1060
	switch (format) {
slouken@0
  1061
	    case SDL_YV12_OVERLAY:
slouken@0
  1062
	    case SDL_IYUV_OVERLAY:
slouken@0
  1063
		if ( display->format->BytesPerPixel == 2 ) {
slouken@0
  1064
#if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
slouken@0
  1065
			/* inline assembly functions */
slouken@739
  1066
			if ( SDL_HasMMX() && (Rmask == 0xF800) &&
slouken@739
  1067
			                     (Gmask == 0x07E0) &&
slouken@739
  1068
				             (Bmask == 0x001F) &&
slouken@739
  1069
			                     (width & 15) == 0) {
slouken@0
  1070
/*printf("Using MMX 16-bit 565 dither\n");*/
slouken@0
  1071
				swdata->Display1X = Color565DitherYV12MMX1X;
slouken@0
  1072
			} else {
slouken@0
  1073
/*printf("Using C 16-bit dither\n");*/
slouken@0
  1074
				swdata->Display1X = Color16DitherYV12Mod1X;
slouken@0
  1075
			}
slouken@0
  1076
#else
slouken@0
  1077
			swdata->Display1X = Color16DitherYV12Mod1X;
slouken@0
  1078
#endif
slouken@0
  1079
			swdata->Display2X = Color16DitherYV12Mod2X;
slouken@0
  1080
		}
slouken@0
  1081
		if ( display->format->BytesPerPixel == 3 ) {
slouken@0
  1082
			swdata->Display1X = Color24DitherYV12Mod1X;
slouken@0
  1083
			swdata->Display2X = Color24DitherYV12Mod2X;
slouken@0
  1084
		}
slouken@0
  1085
		if ( display->format->BytesPerPixel == 4 ) {
slouken@0
  1086
#if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
slouken@0
  1087
			/* inline assembly functions */
slouken@739
  1088
			if ( SDL_HasMMX() && (Rmask == 0x00FF0000) &&
slouken@739
  1089
			                     (Gmask == 0x0000FF00) &&
slouken@739
  1090
				             (Bmask == 0x000000FF) && 
slouken@739
  1091
			                     (width & 15) == 0) {
slouken@0
  1092
/*printf("Using MMX 32-bit dither\n");*/
slouken@0
  1093
				swdata->Display1X = ColorRGBDitherYV12MMX1X;
slouken@0
  1094
			} else {
slouken@0
  1095
/*printf("Using C 32-bit dither\n");*/
slouken@0
  1096
				swdata->Display1X = Color32DitherYV12Mod1X;
slouken@0
  1097
			}
slouken@0
  1098
#else
slouken@0
  1099
			swdata->Display1X = Color32DitherYV12Mod1X;
slouken@0
  1100
#endif
slouken@0
  1101
			swdata->Display2X = Color32DitherYV12Mod2X;
slouken@0
  1102
		}
slouken@0
  1103
		break;
slouken@0
  1104
	    case SDL_YUY2_OVERLAY:
slouken@0
  1105
	    case SDL_UYVY_OVERLAY:
slouken@0
  1106
	    case SDL_YVYU_OVERLAY:
slouken@0
  1107
		if ( display->format->BytesPerPixel == 2 ) {
slouken@0
  1108
			swdata->Display1X = Color16DitherYUY2Mod1X;
slouken@0
  1109
			swdata->Display2X = Color16DitherYUY2Mod2X;
slouken@0
  1110
		}
slouken@0
  1111
		if ( display->format->BytesPerPixel == 3 ) {
slouken@0
  1112
			swdata->Display1X = Color24DitherYUY2Mod1X;
slouken@0
  1113
			swdata->Display2X = Color24DitherYUY2Mod2X;
slouken@0
  1114
		}
slouken@0
  1115
		if ( display->format->BytesPerPixel == 4 ) {
slouken@0
  1116
			swdata->Display1X = Color32DitherYUY2Mod1X;
slouken@0
  1117
			swdata->Display2X = Color32DitherYUY2Mod2X;
slouken@0
  1118
		}
slouken@0
  1119
		break;
slouken@0
  1120
	    default:
slouken@0
  1121
		/* We should never get here (caught above) */
slouken@0
  1122
		break;
slouken@0
  1123
	}
slouken@0
  1124
slouken@0
  1125
	/* Find the pitch and offset values for the overlay */
slouken@0
  1126
	overlay->pitches = swdata->pitches;
slouken@0
  1127
	overlay->pixels = swdata->planes;
slouken@0
  1128
	switch (format) {
slouken@0
  1129
	    case SDL_YV12_OVERLAY:
slouken@0
  1130
	    case SDL_IYUV_OVERLAY:
slouken@0
  1131
		overlay->pitches[0] = overlay->w;
slouken@0
  1132
		overlay->pitches[1] = overlay->pitches[0] / 2;
slouken@0
  1133
		overlay->pitches[2] = overlay->pitches[0] / 2;
slouken@0
  1134
	        overlay->pixels[0] = swdata->pixels;
slouken@0
  1135
	        overlay->pixels[1] = overlay->pixels[0] +
slouken@0
  1136
		                     overlay->pitches[0] * overlay->h;
slouken@0
  1137
	        overlay->pixels[2] = overlay->pixels[1] +
slouken@0
  1138
		                     overlay->pitches[1] * overlay->h / 2;
slouken@0
  1139
		overlay->planes = 3;
slouken@0
  1140
		break;
slouken@0
  1141
	    case SDL_YUY2_OVERLAY:
slouken@0
  1142
	    case SDL_UYVY_OVERLAY:
slouken@0
  1143
	    case SDL_YVYU_OVERLAY:
slouken@0
  1144
		overlay->pitches[0] = overlay->w*2;
slouken@0
  1145
	        overlay->pixels[0] = swdata->pixels;
slouken@0
  1146
		overlay->planes = 1;
slouken@0
  1147
		break;
slouken@0
  1148
	    default:
slouken@0
  1149
		/* We should never get here (caught above) */
slouken@0
  1150
		break;
slouken@0
  1151
	}
slouken@0
  1152
slouken@0
  1153
	/* We're all done.. */
slouken@0
  1154
	return(overlay);
slouken@0
  1155
}
slouken@0
  1156
slouken@0
  1157
int SDL_LockYUV_SW(_THIS, SDL_Overlay *overlay)
slouken@0
  1158
{
slouken@0
  1159
	return(0);
slouken@0
  1160
}
slouken@0
  1161
slouken@0
  1162
void SDL_UnlockYUV_SW(_THIS, SDL_Overlay *overlay)
slouken@0
  1163
{
slouken@0
  1164
	return;
slouken@0
  1165
}
slouken@0
  1166
slouken@0
  1167
int SDL_DisplayYUV_SW(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
slouken@0
  1168
{
slouken@0
  1169
	struct private_yuvhwdata *swdata;
slouken@0
  1170
	SDL_Surface *stretch;
slouken@0
  1171
	SDL_Surface *display;
slouken@0
  1172
	int scale_2x;
slouken@0
  1173
	Uint8 *lum, *Cr, *Cb;
slouken@0
  1174
	Uint8 *dst;
slouken@0
  1175
	int mod;
slouken@0
  1176
slouken@0
  1177
	swdata = overlay->hwdata;
slouken@0
  1178
	scale_2x = 0;
slouken@0
  1179
	stretch = 0;
slouken@0
  1180
	if ( (overlay->w != dstrect->w) || (overlay->h != dstrect->h) ) {
slouken@0
  1181
		if ( (dstrect->w == 2*overlay->w) &&
slouken@0
  1182
		     (dstrect->h == 2*overlay->h) ) {
slouken@0
  1183
			scale_2x = 1;
slouken@0
  1184
		} else {
slouken@0
  1185
			if ( ! swdata->stretch ) {
slouken@0
  1186
				display = swdata->display;
slouken@0
  1187
				swdata->stretch = SDL_CreateRGBSurface(
slouken@0
  1188
					SDL_SWSURFACE,
slouken@0
  1189
					overlay->w, overlay->h,
slouken@0
  1190
					display->format->BitsPerPixel,
slouken@0
  1191
					display->format->Rmask,
slouken@0
  1192
					display->format->Gmask,
slouken@0
  1193
					display->format->Bmask, 0);
slouken@0
  1194
				if ( ! swdata->stretch ) {
slouken@0
  1195
					return(-1);
slouken@0
  1196
				}
slouken@0
  1197
			}
slouken@0
  1198
			stretch = swdata->stretch;
slouken@0
  1199
		}
slouken@0
  1200
	}
slouken@0
  1201
slouken@0
  1202
	if ( stretch ) {
slouken@0
  1203
		display = stretch;
slouken@0
  1204
	} else {
slouken@0
  1205
		display = swdata->display;
slouken@0
  1206
	}
slouken@0
  1207
	switch (overlay->format) {
slouken@0
  1208
	    case SDL_YV12_OVERLAY:
slouken@0
  1209
		lum = overlay->pixels[0];
slouken@0
  1210
		Cr =  overlay->pixels[1];
slouken@0
  1211
		Cb =  overlay->pixels[2];
slouken@0
  1212
		break;
slouken@0
  1213
	    case SDL_IYUV_OVERLAY:
slouken@0
  1214
		lum = overlay->pixels[0];
slouken@0
  1215
		Cr =  overlay->pixels[2];
slouken@0
  1216
		Cb =  overlay->pixels[1];
slouken@0
  1217
		break;
slouken@0
  1218
	    case SDL_YUY2_OVERLAY:
slouken@0
  1219
		lum = overlay->pixels[0];
slouken@0
  1220
		Cr = lum + 3;
slouken@0
  1221
		Cb = lum + 1;
slouken@0
  1222
		break;
slouken@0
  1223
	    case SDL_UYVY_OVERLAY:
slouken@0
  1224
		lum = overlay->pixels[0]+1;
slouken@0
  1225
		Cr = lum + 1;
slouken@0
  1226
		Cb = lum - 1;
slouken@0
  1227
		break;
slouken@0
  1228
	    case SDL_YVYU_OVERLAY:
slouken@0
  1229
		lum = overlay->pixels[0];
slouken@0
  1230
		Cr = lum + 1;
slouken@0
  1231
		Cb = lum + 3;
slouken@0
  1232
		break;
slouken@0
  1233
	    default:
slouken@292
  1234
		SDL_SetError("Unsupported YUV format in blit");
slouken@0
  1235
		return(-1);
slouken@0
  1236
	}
slouken@0
  1237
	if ( SDL_MUSTLOCK(display) ) {
slouken@0
  1238
        	if ( SDL_LockSurface(display) < 0 ) {
slouken@0
  1239
			return(-1);
slouken@0
  1240
		}
slouken@0
  1241
	}
slouken@0
  1242
	if ( stretch ) {
slouken@0
  1243
		dst = (Uint8 *)stretch->pixels;
slouken@0
  1244
	} else {
slouken@0
  1245
		dst = (Uint8 *)display->pixels
slouken@0
  1246
			+ dstrect->x * display->format->BytesPerPixel
slouken@0
  1247
			+ dstrect->y * display->pitch;
slouken@0
  1248
	}
slouken@0
  1249
	mod = (display->pitch / display->format->BytesPerPixel);
slouken@0
  1250
slouken@0
  1251
	if ( scale_2x ) {
slouken@0
  1252
		mod -= (overlay->w * 2);
slouken@0
  1253
		swdata->Display2X(swdata->colortab, swdata->rgb_2_pix,
slouken@0
  1254
		                  lum, Cr, Cb, dst, overlay->h, overlay->w,mod);
slouken@0
  1255
	} else {
slouken@0
  1256
		mod -= overlay->w;
slouken@0
  1257
		swdata->Display1X(swdata->colortab, swdata->rgb_2_pix,
slouken@0
  1258
		                  lum, Cr, Cb, dst, overlay->h, overlay->w,mod);
slouken@0
  1259
	}
slouken@0
  1260
	if ( SDL_MUSTLOCK(display) ) {
slouken@0
  1261
		SDL_UnlockSurface(display);
slouken@0
  1262
	}
slouken@0
  1263
	if ( stretch ) {
slouken@0
  1264
		display = swdata->display;
slouken@0
  1265
		SDL_SoftStretch(stretch, NULL, display, dstrect);
slouken@0
  1266
	}
slouken@0
  1267
	SDL_UpdateRects(display, 1, dstrect);
slouken@0
  1268
slouken@0
  1269
	return(0);
slouken@0
  1270
}
slouken@0
  1271
slouken@0
  1272
void SDL_FreeYUV_SW(_THIS, SDL_Overlay *overlay)
slouken@0
  1273
{
slouken@0
  1274
	struct private_yuvhwdata *swdata;
slouken@0
  1275
slouken@0
  1276
	swdata = overlay->hwdata;
slouken@0
  1277
	if ( swdata ) {
slouken@9
  1278
		if ( swdata->stretch ) {
slouken@9
  1279
			SDL_FreeSurface(swdata->stretch);
slouken@9
  1280
		}
slouken@0
  1281
		if ( swdata->pixels ) {
slouken@1336
  1282
			SDL_free(swdata->pixels);
slouken@0
  1283
		}
slouken@0
  1284
		if ( swdata->colortab ) {
slouken@1336
  1285
			SDL_free(swdata->colortab);
slouken@0
  1286
		}
slouken@0
  1287
		if ( swdata->rgb_2_pix ) {
slouken@1336
  1288
			SDL_free(swdata->rgb_2_pix);
slouken@0
  1289
		}
slouken@1336
  1290
		SDL_free(swdata);
slouken@0
  1291
	}
slouken@0
  1292
}