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/***************************************************************************** |
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* |
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* XVID MPEG-4 VIDEO CODEC |
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* - Adaptive quantization functions - |
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* |
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* Copyright(C) 2002 Peter Ross <pross@xvid.org> |
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* 2002 Christoph Lampert <gruel@web.de> |
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* |
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* This file is part of XviD, a free MPEG-4 video encoder/decoder |
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* |
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* XviD is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program 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 |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* Under section 8 of the GNU General Public License, the copyright |
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* holders of XVID explicitly forbid distribution in the following |
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* countries: |
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* |
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* - Japan |
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* - United States of America |
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* |
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* Linking XviD statically or dynamically with other modules is making a |
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* combined work based on XviD. Thus, the terms and conditions of the |
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* GNU General Public License cover the whole combination. |
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* |
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* As a special exception, the copyright holders of XviD give you |
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* permission to link XviD with independent modules that communicate with |
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* XviD solely through the VFW1.1 and DShow interfaces, regardless of the |
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* license terms of these independent modules, and to copy and distribute |
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* the resulting combined work under terms of your choice, provided that |
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* every copy of the combined work is accompanied by a complete copy of |
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* the source code of XviD (the version of XviD used to produce the |
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* combined work), being distributed under the terms of the GNU General |
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* Public License plus this exception. An independent module is a module |
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* which is not derived from or based on XviD. |
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* |
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* Note that people who make modified versions of XviD are not obligated |
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* to grant this special exception for their modified versions; it is |
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* their choice whether to do so. The GNU General Public License gives |
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* permission to release a modified version without this exception; this |
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* exception also makes it possible to release a modified version which |
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* carries forward this exception. |
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* |
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* $Id: adapt_quant.c,v 1.13 2002-11-26 23:44:11 edgomez Exp $ |
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* |
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****************************************************************************/ |
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#include "../portab.h" |
#include "../portab.h" |
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#include "../global.h" |
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#include "adapt_quant.h" |
#include "adapt_quant.h" |
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#include <stdlib.h> /* free, malloc */ |
#include <stdlib.h> /* free, malloc */ |
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#define MAX(a,b) (((a) > (b)) ? (a) : (b)) |
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#define RDIFF(a,b) ((int)(a+0.5)-(int)(b+0.5)) |
#define RDIFF(a,b) ((int)(a+0.5)-(int)(b+0.5)) |
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/***************************************************************************** |
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* Functions |
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****************************************************************************/ |
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int |
int |
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normalize_quantizer_field(float *in, |
normalize_quantizer_field(float *in, |
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int *out, |
int *out, |
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int min_quant, |
int min_quant, |
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int max_quant, |
int max_quant, |
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int mb_width, |
int mb_width, |
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int mb_height) /* no qstride because normalization */ |
int mb_height) // no qstride because normalization |
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{ |
{ |
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int i, j, k, l; |
int i, j, k, l; |
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if (!(quant = (float *) malloc(mb_width * mb_height * sizeof(float)))) |
if (!(quant = (float *) malloc(mb_width * mb_height * sizeof(float)))) |
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return(-1); |
return(-1); |
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if(!(val = (float *) malloc(mb_width * mb_height * sizeof(float)))) { |
if(!(val = (float *) malloc(mb_width * mb_height * sizeof(float)))) |
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free(quant); |
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return(-1); |
return(-1); |
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} |
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for (k = 0; k < mb_height; k++) { |
for (k = 0; k < mb_height; k++) { |
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for (l = 0; l < mb_width; l++) /* do this for all macroblocks individually */ |
for (l = 0; l < mb_width; l++) // do this for all macroblocks individually |
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{ |
{ |
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quant[k * mb_width + l] = (float) framequant; |
quant[k * mb_width + l] = (float) framequant; |
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/* calculate luminance-masking */ |
// calculate luminance-masking |
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ptr = &buf[16 * k * stride + 16 * l]; /* address of MB */ |
ptr = &buf[16 * k * stride + 16 * l]; // address of MB |
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val[k * mb_width + l] = 0.; |
val[k * mb_width + l] = 0.; |
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if (((global <GlobalBrightThres) &&(global >GlobalDarkThres)) |
if (((global <GlobalBrightThres) &&(global >GlobalDarkThres)) |
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|| (mid_range < MidRangeThres)) { |
|| (mid_range < MidRangeThres)) { |
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for (k = 0; k < mb_height; k++) { |
for (k = 0; k < mb_height; k++) { |
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for (l = 0; l < mb_width; l++) /* do this for all macroblocks individually */ |
for (l = 0; l < mb_width; l++) // do this for all macroblocks individually |
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{ |
{ |
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if (val[k * mb_width + l] < DarkThres) |
if (val[k * mb_width + l] < DarkThres) |
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quant[k * mb_width + l] += |
quant[k * mb_width + l] += |
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