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// 30.10.2002 corrected qpel chroma rounding |
/***************************************************************************** |
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// 04.10.2002 added qpel support to MBMotionCompensation |
* |
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// 01.05.2002 updated MBMotionCompensationBVOP |
* XVID MPEG-4 VIDEO CODEC |
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// 14.04.2002 bframe compensation |
* - Motion Compensation related code - |
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* |
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* Copyright(C) 2002 Peter Ross <pross@xvid.org> |
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* 2003 Christoph Lampert <gruel@web.de> |
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* |
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* 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 |
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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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* $Id$ |
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* |
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****************************************************************************/ |
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#include <stdio.h> |
#include <stdio.h> |
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#include "../encoder.h" |
#include "../encoder.h" |
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#include "../utils/mbfunctions.h" |
#include "../utils/mbfunctions.h" |
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#include "../image/interpolate8x8.h" |
#include "../image/interpolate8x8.h" |
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#include "../image/qpel.h" |
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#include "../image/reduced.h" |
#include "../image/reduced.h" |
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#include "../utils/timer.h" |
#include "../utils/timer.h" |
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#include "motion.h" |
#include "motion.h" |
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#ifndef ABS |
#ifndef RSHIFT |
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#define ABS(X) (((X)>0)?(X):-(X)) |
#define RSHIFT(a,b) ((a) > 0 ? ((a) + (1<<((b)-1)))>>(b) : ((a) + (1<<((b)-1))-1)>>(b)) |
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#endif |
#endif |
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#ifndef SIGN |
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#define SIGN(X) (((X)>0)?1:-1) |
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#endif |
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/* This is borrowed from decoder.c */ |
/* assume b>0 */ |
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static __inline int gmc_sanitize(int value, int quarterpel, int fcode) |
#ifndef RDIV |
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{ |
#define RDIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b)) |
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int length = 1 << (fcode+4); |
#endif |
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if (quarterpel) value *= 2; |
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if (value < -length) |
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return -length; |
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else if (value >= length) |
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return length-1; |
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else return value; |
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} |
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/* And this is borrowed from bitstream.c until we find a common solution */ |
/* This is borrowed from bitstream.c until we find a common solution */ |
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static uint32_t __inline |
static uint32_t __inline |
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log2bin(uint32_t value) |
log2bin(uint32_t value) |
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if(quarterpel) { |
if(quarterpel) { |
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if ((dx&3) | (dy&3)) { |
if ((dx&3) | (dy&3)) { |
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#if defined(ARCH_IS_IA32) /* new_interpolate is only faster on x86 (MMX) machines */ |
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new_interpolate16x16_quarterpel(tmp - y * stride - x, |
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(uint8_t *) ref, tmp + 32, |
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tmp + 64, tmp + 96, x, y, dx, dy, stride, rounding); |
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#else |
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interpolate16x16_quarterpel(tmp - y * stride - x, |
interpolate16x16_quarterpel(tmp - y * stride - x, |
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(uint8_t *) ref, tmp + 32, |
(uint8_t *) ref, tmp + 32, |
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tmp + 64, tmp + 96, x, y, dx, dy, stride, rounding); |
tmp + 64, tmp + 96, x, y, dx, dy, stride, rounding); |
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#endif |
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ptr = tmp; |
ptr = tmp; |
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} else ptr = ref + (y + dy/4)*stride + x + dx/4; // fullpixel position |
} else ptr = ref + (y + dy/4)*stride + x + dx/4; /* fullpixel position */ |
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} else ptr = get_ref(ref, refh, refv, refhv, x, y, 1, dx, dy, stride); |
} else ptr = get_ref(ref, refh, refv, refhv, x, y, 1, dx, dy, stride); |
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transfer_8to16sub(dct_codes+192, cur + y * stride + x + 8*stride+8, |
transfer_8to16sub(dct_codes+192, cur + y * stride + x + 8*stride+8, |
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ptr + 8*stride + 8, stride); |
ptr + 8*stride + 8, stride); |
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} else { //reduced_resolution |
} else { /* reduced_resolution */ |
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x *= 2; y *= 2; |
x *= 2; y *= 2; |
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if(quarterpel) { |
if(quarterpel) { |
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if ((dx&3) | (dy&3)) { |
if ((dx&3) | (dy&3)) { |
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#if defined(ARCH_IS_IA32) /* new_interpolate is only faster on x86 (MMX) machines */ |
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new_interpolate8x8_quarterpel(tmp - y*stride - x, |
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(uint8_t *) ref, tmp + 32, |
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tmp + 64, tmp + 96, x, y, dx, dy, stride, rounding); |
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#else |
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interpolate8x8_quarterpel(tmp - y*stride - x, |
interpolate8x8_quarterpel(tmp - y*stride - x, |
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(uint8_t *) ref, tmp + 32, |
(uint8_t *) ref, tmp + 32, |
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tmp + 64, tmp + 96, x, y, dx, dy, stride, rounding); |
tmp + 64, tmp + 96, x, y, dx, dy, stride, rounding); |
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#endif |
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ptr = tmp; |
ptr = tmp; |
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} else ptr = ref + (y + dy/4)*stride + x + dx/4; // fullpixel position |
} else ptr = ref + (y + dy/4)*stride + x + dx/4; /* fullpixel position */ |
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} else ptr = get_ref(ref, refh, refv, refhv, x, y, 1, dx, dy, stride); |
} else ptr = get_ref(ref, refh, refv, refhv, x, y, 1, dx, dy, stride); |
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transfer_8to16sub(dct_codes, cur + y * stride + x, ptr, stride); |
transfer_8to16sub(dct_codes, cur + y * stride + x, ptr, stride); |
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} else { //reduced_resolution |
} else { /* reduced_resolution */ |
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x *= 2; y *= 2; |
x *= 2; y *= 2; |
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int32_t dx; |
int32_t dx; |
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int32_t dy; |
int32_t dy; |
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uint8_t * const tmp = refv->u; |
uint8_t * const tmp = refv->u; |
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if ( (!reduced_resolution) && (mb->mode == MODE_NOT_CODED) ) { /* quick copy for early SKIP */ |
if ( (!reduced_resolution) && (mb->mode == MODE_NOT_CODED) ) { /* quick copy for early SKIP */ |
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/* early SKIP is only activated in P-VOPs, not in S-VOPs, so mcsel can never be 1 */ |
/* early SKIP is only activated in P-VOPs, not in S-VOPs, so mcsel can never be 1 */ |
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/* if (mb->mcsel) { |
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transfer16x16_copy(cur->y + 16 * (i + j * edged_width), |
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refGMC->y + 16 * (i + j * edged_width), |
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edged_width); |
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transfer8x8_copy(cur->u + 8 * (i + j * edged_width/2), |
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refGMC->u + 8 * (i + j * edged_width/2), |
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edged_width / 2); |
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transfer8x8_copy(cur->v + 8 * (i + j * edged_width/2), |
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refGMC->v + 8 * (i + j * edged_width/2), |
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edged_width / 2); |
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} else |
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*/ |
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{ |
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transfer16x16_copy(cur->y + 16 * (i + j * edged_width), |
transfer16x16_copy(cur->y + 16 * (i + j * edged_width), |
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ref->y + 16 * (i + j * edged_width), |
ref->y + 16 * (i + j * edged_width), |
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edged_width); |
edged_width); |
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transfer8x8_copy(cur->v + 8 * (i + j * edged_width/2), |
transfer8x8_copy(cur->v + 8 * (i + j * edged_width/2), |
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ref->v + 8 * (i + j * edged_width/2), |
ref->v + 8 * (i + j * edged_width/2), |
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edged_width / 2); |
edged_width / 2); |
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} |
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return; |
return; |
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} |
} |
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if ((mb->mode == MODE_NOT_CODED || mb->mode == MODE_INTER |
if ((mb->mode == MODE_NOT_CODED || mb->mode == MODE_INTER |
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|| mb->mode == MODE_INTER_Q) /*&& !quarterpel*/) { |
|| mb->mode == MODE_INTER_Q)) { |
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/* reduced resolution + GMC: not possible */ |
/* reduced resolution + GMC: not possible */ |
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refv->y, refhv->y, tmp, 16 * i, 16 * j, dx, dy, |
refv->y, refhv->y, tmp, 16 * i, 16 * j, dx, dy, |
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edged_width, quarterpel, reduced_resolution, rounding); |
edged_width, quarterpel, reduced_resolution, rounding); |
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dx /= (int)(1 + quarterpel); |
if (quarterpel) { dx /= 2; dy /= 2; } |
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dy /= (int)(1 + quarterpel); |
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dx = (dx >> 1) + roundtab_79[dx & 0x3]; |
dx = (dx >> 1) + roundtab_79[dx & 0x3]; |
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dy = (dy >> 1) + roundtab_79[dy & 0x3]; |
dy = (dy >> 1) + roundtab_79[dy & 0x3]; |
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} else { // mode == MODE_INTER4V |
} else { /* mode == MODE_INTER4V */ |
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int k, sumx = 0, sumy = 0; |
int k, sumx = 0, sumy = 0; |
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const VECTOR * const mvs = (quarterpel ? mb->qmvs : mb->mvs); |
const VECTOR * const mvs = (quarterpel ? mb->qmvs : mb->mvs); |
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for (k = 0; k < 4; k++) { |
for (k = 0; k < 4; k++) { |
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dx = mvs[k].x; |
dx = mvs[k].x; |
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dy = mvs[k].y; |
dy = mvs[k].y; |
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sumx += dx / (1 + quarterpel); |
sumx += quarterpel ? dx/2 : dx; |
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sumy += dy / (1 + quarterpel); |
sumy += quarterpel ? dy/2 : dy; |
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if (reduced_resolution){ |
if (reduced_resolution){ |
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dx = RRV_MV_SCALEUP(dx); |
dx = RRV_MV_SCALEUP(dx); |
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const uint32_t edged_width = pParam->edged_width; |
const uint32_t edged_width = pParam->edged_width; |
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int32_t dx, dy, b_dx, b_dy, sumx, sumy, b_sumx, b_sumy; |
int32_t dx, dy, b_dx, b_dy, sumx, sumy, b_sumx, b_sumy; |
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int k; |
int k; |
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const int quarterpel = pParam->m_quarterpel; |
const int quarterpel = pParam->vol_flags & XVID_VOL_QUARTERPEL; |
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const uint8_t * ptr1, * ptr2; |
const uint8_t * ptr1, * ptr2; |
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uint8_t * const tmp = f_refv->u; |
uint8_t * const tmp = f_refv->u; |
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const VECTOR * const fmvs = (quarterpel ? mb->qmvs : mb->mvs); |
const VECTOR * const fmvs = (quarterpel ? mb->qmvs : mb->mvs); |
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f_refv->y, f_refhv->y, tmp, 16 * i, 16 * j, dx, |
f_refv->y, f_refhv->y, tmp, 16 * i, 16 * j, dx, |
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dy, edged_width, quarterpel, 0, 0); |
dy, edged_width, quarterpel, 0, 0); |
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dx /= 1 + quarterpel; |
if (quarterpel) { dx /= 2; dy /= 2; } |
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dy /= 1 + quarterpel; |
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CompensateChroma( (dx >> 1) + roundtab_79[dx & 0x3], |
CompensateChroma( (dx >> 1) + roundtab_79[dx & 0x3], |
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(dy >> 1) + roundtab_79[dy & 0x3], |
(dy >> 1) + roundtab_79[dy & 0x3], |
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i, j, cur, f_ref, tmp, |
i, j, cur, f_ref, tmp, |
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b_refv->y, b_refhv->y, tmp, 16 * i, 16 * j, b_dx, |
b_refv->y, b_refhv->y, tmp, 16 * i, 16 * j, b_dx, |
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b_dy, edged_width, quarterpel, 0, 0); |
b_dy, edged_width, quarterpel, 0, 0); |
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b_dx /= 1 + quarterpel; |
if (quarterpel) { b_dx /= 2; b_dy /= 2; } |
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b_dy /= 1 + quarterpel; |
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CompensateChroma( (b_dx >> 1) + roundtab_79[b_dx & 0x3], |
CompensateChroma( (b_dx >> 1) + roundtab_79[b_dx & 0x3], |
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(b_dy >> 1) + roundtab_79[b_dy & 0x3], |
(b_dy >> 1) + roundtab_79[b_dy & 0x3], |
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i, j, cur, b_ref, tmp, |
i, j, cur, b_ref, tmp, |
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(uint8_t *) f_ref->y, tmp + 32, |
(uint8_t *) f_ref->y, tmp + 32, |
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tmp + 64, tmp + 96, 16*i, 16*j, dx, dy, edged_width, 0); |
tmp + 64, tmp + 96, 16*i, 16*j, dx, dy, edged_width, 0); |
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ptr1 = tmp; |
ptr1 = tmp; |
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} else ptr1 = f_ref->y + (16*j + dy/4)*edged_width + 16*i + dx/4; // fullpixel position |
} else ptr1 = f_ref->y + (16*j + dy/4)*edged_width + 16*i + dx/4; /* fullpixel position */ |
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if ((b_dx&3) | (b_dy&3)) { |
if ((b_dx&3) | (b_dy&3)) { |
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interpolate16x16_quarterpel(tmp - i * 16 - j * 16 * edged_width + 16, |
interpolate16x16_quarterpel(tmp - i * 16 - j * 16 * edged_width + 16, |
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(uint8_t *) b_ref->y, tmp + 32, |
(uint8_t *) b_ref->y, tmp + 32, |
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tmp + 64, tmp + 96, 16*i, 16*j, b_dx, b_dy, edged_width, 0); |
tmp + 64, tmp + 96, 16*i, 16*j, b_dx, b_dy, edged_width, 0); |
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ptr2 = tmp + 16; |
ptr2 = tmp + 16; |
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} else ptr2 = b_ref->y + (16*j + b_dy/4)*edged_width + 16*i + b_dx/4; // fullpixel position |
} else ptr2 = b_ref->y + (16*j + b_dy/4)*edged_width + 16*i + b_dx/4; /* fullpixel position */ |
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b_dx /= 2; |
b_dx /= 2; |
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b_dy /= 2; |
b_dy /= 2; |
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break; |
break; |
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default: // MODE_DIRECT |
default: /* MODE_DIRECT (or MODE_DIRECT_NONE_MV in case of bframes decoding) */ |
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sumx = sumy = b_sumx = b_sumy = 0; |
sumx = sumy = b_sumx = b_sumy = 0; |
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for (k = 0; k < 4; k++) { |
for (k = 0; k < 4; k++) { |
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break; |
break; |
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} |
} |
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// uv block-based chroma interpolation for direct and interpolate modes |
/* v block-based chroma interpolation for direct and interpolate modes */ |
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transfer_8to16sub2(&dct_codes[4 * 64], |
transfer_8to16sub2(&dct_codes[4 * 64], |
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cur->u + (j * 8) * edged_width / 2 + (i * 8), |
cur->u + (j * 8) * edged_width / 2 + (i * 8), |
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interpolate8x8_switch2(tmp, b_ref->u, 8 * i, 8 * j, |
interpolate8x8_switch2(tmp, b_ref->u, 8 * i, 8 * j, |
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dx, dy, edged_width / 2, 0), |
dx, dy, edged_width / 2, 0), |
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edged_width / 2); |
edged_width / 2); |
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} |
} |
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void |
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generate_GMCparameters( const int num_wp, // [input]: number of warppoints |
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const int res, // [input]: resolution |
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const WARPPOINTS *const warp, // [input]: warp points |
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const int width, const int height, |
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GMC_DATA *const gmc) // [output] precalculated parameters |
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{ |
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/* We follow mainly two sources: The original standard, which is ugly, and the |
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thesis from Andreas Dehnhardt, which is much nicer. |
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Notation is: indices are written next to the variable, |
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primes in the standard are denoted by a suffix 'p'. |
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types are "c"=constant, "i"=input parameter, "f"=calculated, then fixed, |
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"o"=output data, " "=other, "u" = unused, "p"=calc for every pixel |
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type | variable name | ISO name (TeX-style) | value or range | usage |
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------------------------------------------------------------------------------------- |
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c | H | H | [16 , ?] | image width (w/o edges) |
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c | W | W | [16 , ?] | image height (w/o edges) |
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c | i0 | i_0 | 0 | ref. point #1, X |
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c | j0 | j_0 | 0 | ref. point #1, Y |
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c | i1 | i_1 | W | ref. point #2, X |
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c | j1 | j_1 | 0 | ref. point #2, Y |
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cu | i2 | i_2 | 0 | ref. point #3, X |
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cu | i2 | j_2 | H | ref. point #3, Y |
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i | du0 | du[0] | [-16863,16863] | warp vector #1, Y |
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i | dv0 | dv[0] | [-16863,16863] | warp vector #1, Y |
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i | du1 | du[1] | [-16863,16863] | warp vector #2, Y |
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i | dv1 | dv[1] | [-16863,16863] | warp vector #2, Y |
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iu | du2 | du[2] | [-16863,16863] | warp vector #3, Y |
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iu | dv2 | dv[2] | [-16863,16863] | warp vector #3, Y |
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i | s | s | {2,4,8,16} | interpol. resolution |
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f | sigma | - | log2(s) | X / s == X >> sigma |
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f | r | r | =16/s | complementary res. |
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f | rho | \rho | log2(r) | X / r == X >> rho |
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f | i0s | i'_0 | | |
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f | j0s | j'_0 | | |
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f | i1s | i'_1 | | |
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f | j1s | j'_1 | | |
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f | i2s | i'_2 | | |
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f | j2s | j'_2 | | |
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f | alpha | \alpha | | 2^{alpha-1} < W <= 2^alpha |
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f | beta | \beta | | 2^{beta-1} < H <= 2^beta |
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f | Ws | W' | W = 2^{alpha} | scaled width |
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f | Hs | H' | W = 2^{beta} | scaled height |
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f | i1ss | i''_1 | "virtual sprite stuff" |
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f | j1ss | j''_1 | "virtual sprite stuff" |
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f | i2ss | i''_2 | "virtual sprite stuff" |
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f | j2ss | j''_2 | "virtual sprite stuff" |
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*/ |
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/* Some calculations are disabled because we only use 2 warppoints at the moment */ |
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int du0 = warp->duv[0].x; |
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int dv0 = warp->duv[0].y; |
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int du1 = warp->duv[1].x; |
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int dv1 = warp->duv[1].y; |
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// int du2 = warp->duv[2].x; |
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// int dv2 = warp->duv[2].y; |
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gmc->num_wp = num_wp; |
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gmc->s = res; /* scaling parameters 2,4,8 or 16 */ |
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gmc->sigma = log2bin(res-1); /* log2bin(15)=4, log2bin(16)=5, log2bin(17)=5 */ |
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gmc->r = 16/res; |
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gmc->rho = 4 - gmc->sigma; /* = log2bin(r-1) */ |
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gmc->W = width; |
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gmc->H = height; /* fixed reference coordinates */ |
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gmc->alpha = log2bin(gmc->W-1); |
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gmc->Ws= 1<<gmc->alpha; |
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// gmc->beta = log2bin(gmc->H-1); |
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// gmc->Hs= 1<<gmc->beta; |
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// printf("du0=%d dv0=%d du1=%d dv1=%d s=%d sigma=%d W=%d alpha=%d, Ws=%d, rho=%d\n",du0,dv0,du1,dv1,gmc->s,gmc->sigma,gmc->W,gmc->alpha,gmc->Ws,gmc->rho); |
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/* i2s is only needed for num_wp >= 3, etc. */ |
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/* the 's' values are in 1/s pel resolution */ |
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gmc->i0s = res/2 * ( du0 ); |
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gmc->j0s = res/2 * ( dv0 ); |
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gmc->i1s = res/2 * (2*width + du1 + du0 ); |
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gmc->j1s = res/2 * ( dv1 + dv0 ); |
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// gmc->i2s = res/2 * ( du2 + du0 ); |
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// gmc->j2s = res/2 * (2*height + dv2 + dv0 ); |
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/* i2s and i2ss are only needed for num_wp == 3, etc. */ |
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/* the 'ss' values are in 1/16 pel resolution */ |
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gmc->i1ss = 16*gmc->Ws + ((gmc->W-gmc->Ws)*(gmc->r*gmc->i0s) + gmc->Ws*(gmc->r*gmc->i1s - 16*gmc->W)) / gmc->W; |
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gmc->j1ss = ((gmc->W - gmc->Ws)*(gmc->r*gmc->j0s) + gmc->Ws*gmc->r*gmc->j1s) / gmc->W; |
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// gmc->i2ss = ((gmc->H - gmc->Hs)*(gmc->r*gmc->i0s) + gmc->Hs*(gmc->r*gmc->i2s)) / gmc->H; |
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// gmc->j2ss = 16*gmc->Hs + ((gmc->H-gmc->Hs)*(gmc->r*gmc->j0s) + gmc->Ws*(gmc->r*gmc->j2s - 16*gmc->H)) / gmc->H; |
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return; |
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} |
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void |
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generate_GMCimage( const GMC_DATA *const gmc_data, // [input] precalculated data |
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const IMAGE *const pRef, // [input] |
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const int mb_width, |
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const int mb_height, |
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const int stride, |
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const int stride2, |
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const int fcode, // [input] some parameters... |
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const int32_t quarterpel, // [input] for rounding avgMV |
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const int reduced_resolution, // [input] ignored |
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const int32_t rounding, // [input] for rounding image data |
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MACROBLOCK *const pMBs, // [output] average motion vectors |
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IMAGE *const pGMC) // [output] full warped image |
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{ |
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unsigned int mj,mi; |
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VECTOR avgMV; |
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for (mj=0;mj<mb_height;mj++) |
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for (mi=0;mi<mb_width; mi++) |
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{ |
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avgMV = generate_GMCimageMB(gmc_data, pRef, mi, mj, |
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stride, stride2, quarterpel, rounding, pGMC); |
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pMBs[mj*mb_width+mi].amv.x = gmc_sanitize(avgMV.x, quarterpel, fcode); |
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pMBs[mj*mb_width+mi].amv.y = gmc_sanitize(avgMV.y, quarterpel, fcode); |
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pMBs[mj*mb_width+mi].mcsel = 0; /* until mode decision */ |
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} |
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} |
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VECTOR generate_GMCimageMB( const GMC_DATA *const gmc_data, /* [input] all precalc data */ |
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const IMAGE *const pRef, /* [input] */ |
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const int mi, const int mj, /* [input] MB position */ |
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const int stride, /* [input] Lumi stride */ |
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const int stride2, /* [input] chroma stride */ |
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const int quarterpel, /* [input] for rounding of avgMV */ |
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const int rounding, /* [input] for rounding of imgae data */ |
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IMAGE *const pGMC) /* [outut] generate image */ |
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/* |
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type | variable name | ISO name (TeX-style) | value or range | usage |
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------------------------------------------------------------------------------------- |
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p | F | F(i,j) | | pelwise motion vector X in s-th pel |
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p | G | G(i,j) | | pelwise motion vector Y in s-th pel |
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p | Fc | F_c(i,j) | | |
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p | Gc | G_c(i,j) | | same for chroma |
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p | Y00 | Y_{00} | [0,255*s*s] | first: 4 neighbouring Y-values |
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p | Y01 | Y_{01} | [0,255] | at fullpel position, around the |
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p | Y10 | Y_{10} | [0,255*s] | position where pelweise MV points to |
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p | Y11 | Y_{11} | [0,255] | later: bilinear interpol Y-values in Y00 |
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p | C00 | C_{00} | [0,255*s*s] | same for chroma Cb and Cr |
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p | C01 | C_{01} | [0,255] | |
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p | C10 | C_{10} | [0,255*s] | |
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p | C11 | C_{11} | [0,255] | |
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*/ |
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{ |
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const int W = gmc_data->W; |
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const int H = gmc_data->H; |
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const int s = gmc_data->s; |
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const int sigma = gmc_data->sigma; |
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const int r = gmc_data->r; |
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const int rho = gmc_data->rho; |
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const int i0s = gmc_data->i0s; |
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const int j0s = gmc_data->j0s; |
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const int i1ss = gmc_data->i1ss; |
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const int j1ss = gmc_data->j1ss; |
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// const int i2ss = gmc_data->i2ss; |
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// const int j2ss = gmc_data->j2ss; |
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const int alpha = gmc_data->alpha; |
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const int Ws = gmc_data->Ws; |
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// const int beta = gmc_data->beta; |
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// const int Hs = gmc_data->Hs; |
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int I,J; |
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VECTOR avgMV = {0,0}; |
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for (J=16*mj;J<16*(mj+1);J++) |
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for (I=16*mi;I<16*(mi+1);I++) |
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{ |
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int F= i0s + ( ((-r*i0s+i1ss)*I + (r*j0s-j1ss)*J + (1<<(alpha+rho-1))) >> (alpha+rho) ); |
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int G= j0s + ( ((-r*j0s+j1ss)*I + (-r*i0s+i1ss)*J + (1<<(alpha+rho-1))) >> (alpha+rho) ); |
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/* this naive implementation (with lots of multiplications) isn't slower (rather faster) than |
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working incremental. Don't ask me why... maybe the whole this is memory bound? */ |
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const int ri= F & (s-1); // fractional part of pelwise MV X |
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const int rj= G & (s-1); // fractional part of pelwise MV Y |
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int Y00,Y01,Y10,Y11; |
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/* unclipped values are used for avgMV */ |
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avgMV.x += F-(I<<sigma); /* shift position to 1/s-pel, as the MV is */ |
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avgMV.y += G-(J<<sigma); /* TODO: don't do this (of course) */ |
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F >>= sigma; |
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G >>= sigma; |
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/* clip values to be in range. Since we have edges, clip to 1 less than lower boundary |
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this way positions F+1/G+1 are still right */ |
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if (F< -1) |
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F=-1; |
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else if (F>W) |
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F=W; /* W or W-1 doesn't matter, so save 1 subtract ;-) */ |
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if (G< -1) |
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G=-1; |
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else if (G>H) |
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G=H; /* dito */ |
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Y00 = pRef->y[ G*stride + F ]; // Lumi values |
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Y01 = pRef->y[ G*stride + F+1 ]; |
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Y10 = pRef->y[ G*stride + F+stride ]; |
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Y11 = pRef->y[ G*stride + F+stride+1 ]; |
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/* bilinear interpolation */ |
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Y00 = ((s-ri)*Y00 + ri*Y01); |
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Y10 = ((s-ri)*Y10 + ri*Y11); |
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Y00 = ((s-rj)*Y00 + rj*Y10 + s*s/2 - rounding ) >> (sigma+sigma); |
|
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|
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pGMC->y[J*stride+I] = (uint8_t)Y00; /* output 1 Y-pixel */ |
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|
} |
|
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|
|
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|
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|
/* doing chroma _here_ is even more stupid and slow, because won't be used until Compensation and |
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|
most likely not even then (only if the block really _is_ GMC) |
|
|
*/ |
|
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for (J=8*mj;J<8*(mj+1);J++) /* this plays the role of j_c,i_c in the standard */ |
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for (I=8*mi;I<8*(mi+1);I++) /* For I_c we have to use I_c = 4*i_c+1 ! */ |
|
|
{ |
|
|
/* same positions for both chroma components, U=Cb and V=Cr */ |
|
|
int Fc=((-r*i0s+i1ss)*(4*I+1) + (r*j0s-j1ss)*(4*J+1) +2*Ws*r*i0s |
|
|
-16*Ws +(1<<(alpha+rho+1)))>>(alpha+rho+2); |
|
|
int Gc=((-r*j0s+j1ss)*(4*I+1) +(-r*i0s+i1ss)*(4*J+1) +2*Ws*r*j0s |
|
|
-16*Ws +(1<<(alpha+rho+1))) >>(alpha+rho+2); |
|
|
|
|
|
const int ri= Fc & (s-1); // fractional part of pelwise MV X |
|
|
const int rj= Gc & (s-1); // fractional part of pelwise MV Y |
|
|
|
|
|
int C00,C01,C10,C11; |
|
|
|
|
|
Fc >>= sigma; |
|
|
Gc >>= sigma; |
|
|
|
|
|
if (Fc< -1) |
|
|
Fc=-1; |
|
|
else if (Fc>=W/2) |
|
|
Fc=W/2; /* W or W-1 doesn't matter, so save 1 subtraction ;-) */ |
|
|
if (Gc< -1) |
|
|
Gc=-1; |
|
|
else if (Gc>=H/2) |
|
|
Gc=H/2; /* dito */ |
|
|
|
|
|
/* now calculate U data */ |
|
|
C00 = pRef->u[ Gc*stride2 + Fc ]; // chroma-value Cb |
|
|
C01 = pRef->u[ Gc*stride2 + Fc+1 ]; |
|
|
C10 = pRef->u[ (Gc+1)*stride2 + Fc ]; |
|
|
C11 = pRef->u[ (Gc+1)*stride2 + Fc+1 ]; |
|
|
|
|
|
/* bilinear interpolation */ |
|
|
C00 = ((s-ri)*C00 + ri*C01); |
|
|
C10 = ((s-ri)*C10 + ri*C11); |
|
|
C00 = ((s-rj)*C00 + rj*C10 + s*s/2 - rounding ) >> (sigma+sigma); |
|
|
|
|
|
pGMC->u[J*stride2+I] = (uint8_t)C00; /* output 1 U-pixel */ |
|
|
|
|
|
/* now calculate V data */ |
|
|
C00 = pRef->v[ Gc*stride2 + Fc ]; // chroma-value Cr |
|
|
C01 = pRef->v[ Gc*stride2 + Fc+1 ]; |
|
|
C10 = pRef->v[ (Gc+1)*stride2 + Fc ]; |
|
|
C11 = pRef->v[ (Gc+1)*stride2 + Fc+1 ]; |
|
|
|
|
|
/* bilinear interpolation */ |
|
|
C00 = ((s-ri)*C00 + ri*C01); |
|
|
C10 = ((s-ri)*C10 + ri*C11); |
|
|
C00 = ((s-rj)*C00 + rj*C10 + s*s/2 - rounding ) >> (sigma+sigma); |
|
|
|
|
|
pGMC->v[J*stride2+I] = (uint8_t)C00; /* output 1 V-pixel */ |
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
/* The average vector is rounded from 1/s-pel to 1/2 or 1/4 */ |
|
|
if (quarterpel) |
|
|
{ /* >>8 because of 256 terms in sum, >>(sigma-2) to obtain 1/4th-pel */ |
|
|
avgMV.x = ( (avgMV.x + (1<<(sigma+5)) )>>(sigma+6) ); |
|
|
avgMV.y = ( (avgMV.y + (1<<(sigma+5)) )>>(sigma+6) ); |
|
|
} |
|
|
else |
|
|
{ /* >>8 because of 256 terms in sum, >>(sigma-1) to obtain 1/2th-pel */ |
|
|
avgMV.x = ( (avgMV.x + (1<<(sigma+6)))>>(sigma+7) ); |
|
|
avgMV.y = ( (avgMV.y + (1<<(sigma+6)))>>(sigma+7) ); |
|
|
} /* TODO: Check if this is correct way of rounding */ |
|
|
|
|
|
return avgMV; /* clipping to fcode area is done outside! */ |
|
|
} |
|
|
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|
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