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/***************************************************************************** |
/***************************************************************************** |
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* |
* |
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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* - Adaptive quantization functions - |
* - Deprecated code - |
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* |
* |
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* Copyright(C) 2002 Peter Ross |
* Copyright(C) 2002 Peter Ross <pross@xvid.org> |
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* |
* 2002 Christoph Lampert <gruel@web.de> |
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* This program is an implementation of a part of one or more MPEG-4 |
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* Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
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* to use this software module in hardware or software products are |
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* advised that its use may infringe existing patents or copyrights, and |
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* any such use would be at such party's own risk. The original |
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* developer of this software module and his/her company, and subsequent |
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* editors and their companies, will have no liability for use of this |
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* software or modifications or derivatives thereof. |
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* |
* |
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* This program is free software ; you can redistribute it and/or modify |
* This program is free software ; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
* it under the terms of the GNU General Public License as published by |
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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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return(-1); |
return(-1); |
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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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} |
} |
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} |
} |
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} |
} |
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i = normalize_quantizer_field(quant, intquant, |
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mb_width * mb_height, |
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min_quant, max_quant); |
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free(val); |
free(val); |
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free(quant); |
free(quant); |
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return normalize_quantizer_field(quant, intquant, mb_width * mb_height, |
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min_quant, max_quant); |
return(i); |
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} |
} |