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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
4 |
* - Postprocessing functions - |
* - Postprocessing functions - |
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* |
* |
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* Copyright(C) 2003 Michael Militzer <isibaar@xvid.org> |
* Copyright(C) 2003-2010 Michael Militzer <isibaar@xvid.org> |
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* 2004 Marc Fauconneau |
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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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#include "../portab.h" |
#include "../portab.h" |
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#include "../global.h" |
#include "../global.h" |
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#include "image.h" |
#include "image.h" |
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#include "../utils/emms.h" |
35 |
#include "postprocessing.h" |
#include "postprocessing.h" |
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37 |
/* Filtering thresholds */ |
/* function pointers */ |
38 |
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IMAGEBRIGHTNESS_PTR image_brightness; |
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#define THR1 2 |
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#define THR2 6 |
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/* Some useful (and fast) macros |
/* Some useful (and fast) macros |
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Note that the MIN/MAX macros assume signed shift - if your compiler |
Note that the MIN/MAX macros assume signed shift - if your compiler |
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#define FAST_ABS(x) ((((int)(x)) >> 31) ^ ((int)(x))) - (((int)(x)) >> 31) |
#define FAST_ABS(x) ((((int)(x)) >> 31) ^ ((int)(x))) - (((int)(x)) >> 31) |
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#define ABS(X) (((X)>0)?(X):-(X)) |
#define ABS(X) (((X)>0)?(X):-(X)) |
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static int8_t xvid_thresh_tbl[510]; |
void init_postproc(XVID_POSTPROC *tbls) |
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static int8_t xvid_abs_tbl[510]; |
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void init_postproc(void) |
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{ |
{ |
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int i; |
init_deblock(tbls); |
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init_noise(tbls); |
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for(i = -255; i < 256; i++) { |
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xvid_thresh_tbl[i + 255] = 0; |
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if(ABS(i) < THR1) |
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xvid_thresh_tbl[i + 255] = 1; |
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xvid_abs_tbl[i + 255] = ABS(i); |
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} |
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} |
} |
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void |
void |
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image_deblock(IMAGE * img, int edged_width, |
stripe_deblock_h(SMPDeblock *h) |
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const MACROBLOCK * mbs, int mb_width, int mb_height, int mb_stride, |
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int flags) |
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{ |
{ |
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const int edged_width2 = edged_width /2; |
const int stride = h->stride; |
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const int stride2 = stride /2; |
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int i,j; |
int i,j; |
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int quant; |
int quant; |
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/* luma: j,i in block units */ |
/* luma: j,i in block units */ |
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if ((flags & XVID_DEBLOCKY)) |
if ((h->flags & XVID_DEBLOCKY)) |
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{ |
{ |
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for (j = 1; j < mb_height*2; j++) /* horizontal deblocking */ |
int dering = h->flags & XVID_DERINGY; |
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for (i = 0; i < mb_width*2; i++) |
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for (j = 1; j < h->stop_y; j++) /* horizontal luma deblocking */ |
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for (i = h->start_x; i < h->stop_x; i++) |
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{ |
{ |
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quant = mbs[(j+0)/2*mb_stride + (i/2)].quant; |
quant = h->mbs[(j+0)/2*h->mb_stride + (i/2)].quant; |
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deblock8x8_h(img->y + j*8*edged_width + i*8, edged_width, quant); |
deblock8x8_h(h->tbls, h->img->y + j*8*stride + i*8, stride, quant, dering); |
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} |
} |
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} |
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/* chroma */ |
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if ((h->flags & XVID_DEBLOCKUV)) |
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{ |
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int dering = h->flags & XVID_DERINGUV; |
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for (j = 0; j < mb_height*2; j++) /* vertical deblocking */ |
for (j = 1; j < h->stop_y/2; j++) /* horizontal deblocking */ |
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for (i = 1; i < mb_width*2; i++) |
for (i = h->start_x/2; i < h->stop_x/2; i++) |
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{ |
{ |
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quant = mbs[(j+0)/2*mb_stride + (i/2)].quant; |
quant = h->mbs[(j+0)*h->mb_stride + i].quant; |
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deblock8x8_v(img->y + j*8*edged_width + i*8, edged_width, quant); |
deblock8x8_h(h->tbls, h->img->u + j*8*stride2 + i*8, stride2, quant, dering); |
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deblock8x8_h(h->tbls, h->img->v + j*8*stride2 + i*8, stride2, quant, dering); |
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} |
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} |
} |
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} |
} |
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void |
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stripe_deblock_v(SMPDeblock *h) |
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{ |
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const int stride = h->stride; |
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const int stride2 = stride /2; |
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int i,j; |
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int quant; |
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/* luma: j,i in block units */ |
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if ((h->flags & XVID_DEBLOCKY)) |
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{ |
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int dering = h->flags & XVID_DERINGY; |
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for (j = h->start_y; j < h->stop_y; j++) /* vertical deblocking */ |
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for (i = 1; i < h->stop_x; i++) |
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{ |
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quant = h->mbs[(j+0)/2*h->mb_stride + (i/2)].quant; |
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deblock8x8_v(h->tbls, h->img->y + j*8*stride + i*8, stride, quant, dering); |
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} |
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} |
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/* chroma */ |
/* chroma */ |
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if ((flags & XVID_DEBLOCKUV)) |
if ((h->flags & XVID_DEBLOCKUV)) |
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{ |
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int dering = h->flags & XVID_DERINGUV; |
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for (j = h->start_y/2; j < h->stop_y/2; j++) /* vertical deblocking */ |
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for (i = 1; i < h->stop_x/2; i++) |
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{ |
{ |
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for (j = 1; j < mb_height; j++) /* horizontal deblocking */ |
quant = h->mbs[(j+0)*h->mb_stride + i].quant; |
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for (i = 0; i < mb_width; i++) |
deblock8x8_v(h->tbls, h->img->u + j*8*stride2 + i*8, stride2, quant, dering); |
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deblock8x8_v(h->tbls, h->img->v + j*8*stride2 + i*8, stride2, quant, dering); |
126 |
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} |
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} |
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} |
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void |
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image_postproc(XVID_POSTPROC *tbls, IMAGE * img, int edged_width, |
132 |
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const MACROBLOCK * mbs, int mb_width, int mb_height, int mb_stride, |
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int flags, int brightness, int frame_num, int bvop, int threads) |
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{ |
{ |
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quant = mbs[(j+0)*mb_stride + i].quant; |
int k; |
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deblock8x8_h(img->u + j*8*edged_width2 + i*8, edged_width2, quant); |
#ifndef HAVE_PTHREAD |
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deblock8x8_h(img->v + j*8*edged_width2 + i*8, edged_width2, quant); |
int num_threads = 1; |
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#else |
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int num_threads = MAX(1, MIN(threads, 4)); |
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void *status = NULL; |
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#endif |
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SMPDeblock data[4]; |
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/* horizontal deblocking, dispatch threads */ |
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for (k = 0; k < num_threads; k++) { |
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data[k].flags = flags; |
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data[k].img = img; |
148 |
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data[k].mb_stride = mb_stride; |
149 |
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data[k].mbs = mbs; |
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data[k].stride = edged_width; |
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data[k].tbls = tbls; |
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153 |
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data[k].start_x = (k*mb_width / num_threads)*2; |
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data[k].stop_x = ((k+1)*mb_width / num_threads)*2; |
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data[k].stop_y = mb_height*2; |
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} |
158 |
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#ifdef HAVE_PTHREAD |
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/* create threads */ |
160 |
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for (k = 1; k < num_threads; k++) { |
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pthread_create(&data[k].handle, NULL, |
162 |
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(void*)stripe_deblock_h, (void*)&data[k]); |
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} |
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#endif |
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stripe_deblock_h(&data[0]); |
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#ifdef HAVE_PTHREAD |
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/* wait until all threads are finished */ |
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for (k = 1; k < num_threads; k++) { |
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pthread_join(data[k].handle, &status); |
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} |
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#endif |
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/* vertical deblocking, dispatch threads */ |
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for (k = 0; k < num_threads; k++) { |
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data[k].start_y = (k*mb_height / num_threads)*2; |
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data[k].stop_y = ((k+1)*mb_height / num_threads)*2; |
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data[k].stop_x = mb_width*2; |
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} |
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181 |
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#ifdef HAVE_PTHREAD |
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/* create threads */ |
183 |
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for (k = 1; k < num_threads; k++) { |
184 |
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pthread_create(&data[k].handle, NULL, |
185 |
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(void*)stripe_deblock_v, (void*)&data[k]); |
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} |
187 |
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#endif |
188 |
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stripe_deblock_v(&data[0]); |
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#ifdef HAVE_PTHREAD |
191 |
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/* wait until all threads are finished */ |
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for (k = 1; k < num_threads; k++) { |
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pthread_join(data[k].handle, &status); |
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} |
} |
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#endif |
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197 |
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if (!bvop) |
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tbls->prev_quant = mbs->quant; |
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for (j = 0; j < mb_height; j++) /* vertical deblocking */ |
if ((flags & XVID_FILMEFFECT)) |
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for (i = 1; i < mb_width; i++) |
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{ |
{ |
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quant = mbs[(j+0)*mb_stride + i].quant; |
add_noise(tbls, img->y, img->y, edged_width, mb_width*16, |
203 |
deblock8x8_v(img->u + j*8*edged_width2 + i*8, edged_width2, quant); |
mb_height*16, frame_num % 3, tbls->prev_quant); |
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deblock8x8_v(img->v + j*8*edged_width2 + i*8, edged_width2, quant); |
} |
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206 |
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if (brightness != 0) { |
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image_brightness(img->y, edged_width, mb_width*16, mb_height*16, brightness); |
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} |
209 |
} |
} |
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211 |
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/******************************************************************************/ |
212 |
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213 |
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void init_deblock(XVID_POSTPROC *tbls) |
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{ |
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int i; |
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217 |
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for(i = -255; i < 256; i++) { |
218 |
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tbls->xvid_thresh_tbl[i + 255] = 0; |
219 |
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if(ABS(i) < THR1) |
220 |
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tbls->xvid_thresh_tbl[i + 255] = 1; |
221 |
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tbls->xvid_abs_tbl[i + 255] = ABS(i); |
222 |
} |
} |
223 |
} |
} |
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s[8] = *(v[8] = img + x*stride + 3); \ |
s[8] = *(v[8] = img + x*stride + 3); \ |
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s[9] = *(v[9] = img + x*stride + 4); |
s[9] = *(v[9] = img + x*stride + 4); |
250 |
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#define APPLY_DERING(x) \ |
252 |
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*v[x] = (e[x] == 0) ? ( \ |
253 |
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(e[x-1] == 0) ? ( \ |
254 |
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(e[x+1] == 0) ? \ |
255 |
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((s[x-1]+s[x]*2+s[x+1])>>2) \ |
256 |
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: ((s[x-1]+s[x])>>1) ) \ |
257 |
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: ((s[x]+s[x+1])>>1) ) \ |
258 |
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: s[x]; |
259 |
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#define APPLY_FILTER_CORE \ |
#define APPLY_FILTER_CORE \ |
261 |
/* First, decide whether to use default or DC-offset mode */ \ |
/* First, decide whether to use default or DC-offset mode */ \ |
262 |
\ |
\ |
263 |
eq_cnt = 0; \ |
eq_cnt = 0; \ |
264 |
\ |
\ |
265 |
eq_cnt += xvid_thresh_tbl[s[0] - s[1] + 255]; \ |
eq_cnt += tbls->xvid_thresh_tbl[s[0] - s[1] + 255]; \ |
266 |
eq_cnt += xvid_thresh_tbl[s[1] - s[2] + 255]; \ |
eq_cnt += tbls->xvid_thresh_tbl[s[1] - s[2] + 255]; \ |
267 |
eq_cnt += xvid_thresh_tbl[s[2] - s[3] + 255]; \ |
eq_cnt += tbls->xvid_thresh_tbl[s[2] - s[3] + 255]; \ |
268 |
eq_cnt += xvid_thresh_tbl[s[3] - s[4] + 255]; \ |
eq_cnt += tbls->xvid_thresh_tbl[s[3] - s[4] + 255]; \ |
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eq_cnt += xvid_thresh_tbl[s[4] - s[5] + 255]; \ |
eq_cnt += tbls->xvid_thresh_tbl[s[4] - s[5] + 255]; \ |
270 |
eq_cnt += xvid_thresh_tbl[s[5] - s[6] + 255]; \ |
eq_cnt += tbls->xvid_thresh_tbl[s[5] - s[6] + 255]; \ |
271 |
eq_cnt += xvid_thresh_tbl[s[6] - s[7] + 255]; \ |
eq_cnt += tbls->xvid_thresh_tbl[s[6] - s[7] + 255]; \ |
272 |
eq_cnt += xvid_thresh_tbl[s[7] - s[8] + 255]; \ |
eq_cnt += tbls->xvid_thresh_tbl[s[7] - s[8] + 255]; \ |
273 |
\ |
\ |
274 |
if(eq_cnt < THR2) { /* Default mode */ \ |
if(eq_cnt < THR2) { /* Default mode */ \ |
275 |
int a30, a31, a32; \ |
int a30, a31, a32; \ |
276 |
int diff, limit; \ |
int diff, limit; \ |
277 |
\ |
\ |
278 |
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if(tbls->xvid_abs_tbl[(s[4] - s[5]) + 255] < quant) { \ |
279 |
a30 = ((s[3]<<1) - s[4] * 5 + s[5] * 5 - (s[6]<<1)); \ |
a30 = ((s[3]<<1) - s[4] * 5 + s[5] * 5 - (s[6]<<1)); \ |
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\ |
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if(xvid_abs_tbl[a30 + 255] < 8*quant) { \ |
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280 |
a31 = ((s[1]<<1) - s[2] * 5 + s[3] * 5 - (s[4]<<1)); \ |
a31 = ((s[1]<<1) - s[2] * 5 + s[3] * 5 - (s[4]<<1)); \ |
281 |
a32 = ((s[5]<<1) - s[6] * 5 + s[7] * 5 - (s[8]<<1)); \ |
a32 = ((s[5]<<1) - s[6] * 5 + s[7] * 5 - (s[8]<<1)); \ |
282 |
\ |
\ |
283 |
diff = (5 * ((SIGN(a30) * MIN(xvid_abs_tbl[a30 + 255], MIN(xvid_abs_tbl[a31 + 255], xvid_abs_tbl[a32 + 255]))) - a30) + 32) >> 6; \ |
diff = (5 * ((SIGN(a30) * MIN(FAST_ABS(a30), MIN(FAST_ABS(a31), FAST_ABS(a32)))) - a30) + 32) >> 6; \ |
284 |
limit = (s[4] - s[5]) / 2; \ |
limit = (s[4] - s[5]) / 2; \ |
285 |
\ |
\ |
286 |
if (limit > 0) \ |
if (limit > 0) \ |
291 |
*v[4] -= diff; \ |
*v[4] -= diff; \ |
292 |
*v[5] += diff; \ |
*v[5] += diff; \ |
293 |
} \ |
} \ |
294 |
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if (dering) { \ |
295 |
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e[0] = (tbls->xvid_abs_tbl[(s[0] - s[1]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ |
296 |
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e[1] = (tbls->xvid_abs_tbl[(s[1] - s[2]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ |
297 |
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e[2] = (tbls->xvid_abs_tbl[(s[2] - s[3]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ |
298 |
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e[3] = (tbls->xvid_abs_tbl[(s[3] - s[4]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ |
299 |
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e[4] = (tbls->xvid_abs_tbl[(s[4] - s[5]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ |
300 |
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e[5] = (tbls->xvid_abs_tbl[(s[5] - s[6]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ |
301 |
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e[6] = (tbls->xvid_abs_tbl[(s[6] - s[7]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ |
302 |
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e[7] = (tbls->xvid_abs_tbl[(s[7] - s[8]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ |
303 |
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e[8] = (tbls->xvid_abs_tbl[(s[8] - s[9]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ |
304 |
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\ |
305 |
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e[1] |= e[0]; \ |
306 |
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e[2] |= e[1]; \ |
307 |
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e[3] |= e[2]; \ |
308 |
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e[4] |= e[3]; \ |
309 |
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e[5] |= e[4]; \ |
310 |
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e[6] |= e[5]; \ |
311 |
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e[7] |= e[6]; \ |
312 |
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e[8] |= e[7]; \ |
313 |
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e[9] = e[8]; \ |
314 |
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\ |
315 |
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APPLY_DERING(1) \ |
316 |
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APPLY_DERING(2) \ |
317 |
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APPLY_DERING(3) \ |
318 |
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APPLY_DERING(4) \ |
319 |
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APPLY_DERING(5) \ |
320 |
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APPLY_DERING(6) \ |
321 |
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APPLY_DERING(7) \ |
322 |
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APPLY_DERING(8) \ |
323 |
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} \ |
324 |
} \ |
} \ |
325 |
else { /* DC-offset mode */ \ |
else { /* DC-offset mode */ \ |
326 |
uint8_t p0, p9; \ |
uint8_t p0, p9; \ |
333 |
if(((max-min)) < 2*quant) { \ |
if(((max-min)) < 2*quant) { \ |
334 |
\ |
\ |
335 |
/* Choose edge pixels */ \ |
/* Choose edge pixels */ \ |
336 |
p0 = (xvid_abs_tbl[(s[1] - s[0]) + 255] < quant) ? s[0] : s[1]; \ |
p0 = (tbls->xvid_abs_tbl[(s[1] - s[0]) + 255] < quant) ? s[0] : s[1]; \ |
337 |
p9 = (xvid_abs_tbl[(s[8] - s[9]) + 255] < quant) ? s[9] : s[8]; \ |
p9 = (tbls->xvid_abs_tbl[(s[8] - s[9]) + 255] < quant) ? s[9] : s[8]; \ |
338 |
\ |
\ |
339 |
*v[1] = (uint8_t) ((6*p0 + (s[1]<<2) + (s[2]<<1) + (s[3]<<1) + s[4] + s[5] + 8) >> 4); \ |
*v[1] = (uint8_t) ((6*p0 + (s[1]<<2) + (s[2]<<1) + (s[3]<<1) + s[4] + s[5] + 8) >> 4); \ |
340 |
*v[2] = (uint8_t) (((p0<<2) + (s[1]<<1) + (s[2]<<2) + (s[3]<<1) + (s[4]<<1) + s[5] + s[6] + 8) >> 4); \ |
*v[2] = (uint8_t) (((p0<<2) + (s[1]<<1) + (s[2]<<2) + (s[3]<<1) + (s[4]<<1) + s[5] + s[6] + 8) >> 4); \ |
347 |
} \ |
} \ |
348 |
} |
} |
349 |
|
|
350 |
void deblock8x8_h(uint8_t *img, int stride, int quant) |
void deblock8x8_h(XVID_POSTPROC *tbls, uint8_t *img, int stride, int quant, int dering) |
351 |
{ |
{ |
352 |
int eq_cnt; |
int eq_cnt; |
353 |
uint8_t *v[10]; |
uint8_t *v[10]; |
354 |
int32_t s[10]; |
int s[10]; |
355 |
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int e[10]; |
356 |
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|
357 |
LOAD_DATA_HOR(0) |
LOAD_DATA_HOR(0) |
358 |
APPLY_FILTER_CORE |
APPLY_FILTER_CORE |
380 |
} |
} |
381 |
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382 |
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383 |
void deblock8x8_v(uint8_t *img, int stride, int quant) |
void deblock8x8_v(XVID_POSTPROC *tbls, uint8_t *img, int stride, int quant, int dering) |
384 |
{ |
{ |
385 |
int eq_cnt; |
int eq_cnt; |
386 |
uint8_t *v[10]; |
uint8_t *v[10]; |
387 |
int s[10]; |
int s[10]; |
388 |
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int e[10]; |
389 |
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|
390 |
LOAD_DATA_VER(0) |
LOAD_DATA_VER(0) |
391 |
APPLY_FILTER_CORE |
APPLY_FILTER_CORE |
411 |
LOAD_DATA_VER(7) |
LOAD_DATA_VER(7) |
412 |
APPLY_FILTER_CORE |
APPLY_FILTER_CORE |
413 |
} |
} |
414 |
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415 |
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/****************************************************************************** |
416 |
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* * |
417 |
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* Noise code below taken from MPlayer: http://www.mplayerhq.hu/ * |
418 |
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* Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at> * |
419 |
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* * |
420 |
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******************************************************************************/ |
421 |
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422 |
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#define RAND_N(range) ((int) ((double)range * rand() / (RAND_MAX + 1.0))) |
423 |
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#define STRENGTH1 12 |
424 |
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#define STRENGTH2 8 |
425 |
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426 |
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void init_noise(XVID_POSTPROC *tbls) |
427 |
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{ |
428 |
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int i, j; |
429 |
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int patt[4] = { -1,0,1,0 }; |
430 |
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|
431 |
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emms(); |
432 |
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433 |
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srand(123457); |
434 |
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435 |
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for(i = 0, j = 0; i < MAX_NOISE; i++, j++) |
436 |
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{ |
437 |
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double x1, x2, w, y1, y2; |
438 |
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439 |
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do { |
440 |
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x1 = 2.0 * rand() / (float) RAND_MAX - 1.0; |
441 |
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x2 = 2.0 * rand() / (float) RAND_MAX - 1.0; |
442 |
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w = x1 * x1 + x2 * x2; |
443 |
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} while (w >= 1.0); |
444 |
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445 |
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w = sqrt((-2.0 * log(w)) / w); |
446 |
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y1 = x1 * w; |
447 |
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y2 = x1 * w; |
448 |
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449 |
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y1 *= STRENGTH1 / sqrt(3.0); |
450 |
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y2 *= STRENGTH2 / sqrt(3.0); |
451 |
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452 |
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y1 /= 2; |
453 |
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y2 /= 2; |
454 |
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y1 += patt[j%4] * STRENGTH1 * 0.35; |
455 |
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y2 += patt[j%4] * STRENGTH2 * 0.35; |
456 |
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457 |
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if (y1 < -128) { |
458 |
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y1=-128; |
459 |
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} |
460 |
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else if (y1 > 127) { |
461 |
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y1= 127; |
462 |
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} |
463 |
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464 |
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if (y2 < -128) { |
465 |
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y2=-128; |
466 |
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} |
467 |
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else if (y2 > 127) { |
468 |
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y2= 127; |
469 |
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} |
470 |
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471 |
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y1 /= 3.0; |
472 |
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y2 /= 3.0; |
473 |
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tbls->xvid_noise1[i] = (int) y1; |
474 |
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tbls->xvid_noise2[i] = (int) y2; |
475 |
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|
476 |
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if (RAND_N(6) == 0) { |
477 |
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j--; |
478 |
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} |
479 |
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} |
480 |
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|
481 |
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for (i = 0; i < MAX_RES; i++) |
482 |
|
for (j = 0; j < 3; j++) { |
483 |
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tbls->xvid_prev_shift[i][j] = tbls->xvid_noise1 + (rand() & (MAX_SHIFT - 1)); |
484 |
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tbls->xvid_prev_shift[i][3 + j] = tbls->xvid_noise2 + (rand() & (MAX_SHIFT - 1)); |
485 |
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} |
486 |
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} |
487 |
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|
488 |
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void add_noise(XVID_POSTPROC *tbls, uint8_t *dst, uint8_t *src, int stride, int width, int height, int shiftptr, int quant) |
489 |
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{ |
490 |
|
int x, y; |
491 |
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int shift = 0; |
492 |
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int add = (quant < 5) ? 3 : 0; |
493 |
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int8_t *noise = (quant < 5) ? tbls->xvid_noise2 : tbls->xvid_noise1; |
494 |
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|
495 |
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for(y = 0; y < height; y++) |
496 |
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{ |
497 |
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int8_t *src2 = (int8_t *) src; |
498 |
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|
499 |
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shift = rand() & (MAX_SHIFT - 1); |
500 |
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|
501 |
|
shift &= ~7; |
502 |
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for(x = 0; x < width; x++) |
503 |
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{ |
504 |
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const int n = tbls->xvid_prev_shift[y][0 + add][x] + tbls->xvid_prev_shift[y][1 + add][x] + |
505 |
|
tbls->xvid_prev_shift[y][2 + add][x]; |
506 |
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|
507 |
|
dst[x] = src2[x] + ((n * src2[x]) >> 7); |
508 |
|
} |
509 |
|
|
510 |
|
tbls->xvid_prev_shift[y][shiftptr + add] = noise + shift; |
511 |
|
|
512 |
|
dst += stride; |
513 |
|
src += stride; |
514 |
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} |
515 |
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} |
516 |
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|
517 |
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|
518 |
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void image_brightness_c(uint8_t *dst, int stride, int width, int height, int offset) |
519 |
|
{ |
520 |
|
int x,y; |
521 |
|
|
522 |
|
for(y = 0; y < height; y++) |
523 |
|
{ |
524 |
|
for(x = 0; x < width; x++) |
525 |
|
{ |
526 |
|
int p = dst[y*stride + x]; |
527 |
|
dst[y*stride + x] = CLIP( p + offset, 0, 255); |
528 |
|
} |
529 |
|
} |
530 |
|
} |