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55c970e349
patch by Vitor vitor1001 gmail moc original thread: [FFmpeg-devel] [PATCH] RoQ video encoder, take 2 date: 05/27/2007 12:21 PM Originally committed as revision 9149 to svn://svn.ffmpeg.org/ffmpeg/trunk
230 lines
7.0 KiB
C
230 lines
7.0 KiB
C
/*
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* Copyright (C) 2003 the ffmpeg project
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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/**
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* @file roqvideo.c
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* Id RoQ Video common functions based on work by Dr. Tim Ferguson
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*/
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#include "avcodec.h"
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#include "roqvideo.h"
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#define avg2(a,b) av_clip_uint8(((int)(a)+(int)(b)+1)>>1)
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#define avg4(a,b,c,d) av_clip_uint8(((int)(a)+(int)(b)+(int)(c)+(int)(d)+2)>>2)
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void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
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{
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unsigned char *yptr;
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yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
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*yptr++ = cell->y[0];
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*yptr++ = cell->y[1];
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yptr += (ri->y_stride - 2);
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*yptr++ = cell->y[2];
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*yptr++ = cell->y[3];
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ri->current_frame->data[1][(y/2) * (ri->c_stride) + x/2] = cell->u;
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ri->current_frame->data[2][(y/2) * (ri->c_stride) + x/2] = cell->v;
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}
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void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
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{
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unsigned long row_inc, c_row_inc;
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register unsigned char y0, y1, u, v;
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unsigned char *yptr, *uptr, *vptr;
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yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
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uptr = ri->current_frame->data[1] + (y/2) * (ri->c_stride) + x/2;
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vptr = ri->current_frame->data[2] + (y/2) * (ri->c_stride) + x/2;
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row_inc = ri->y_stride - 4;
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c_row_inc = (ri->c_stride) - 2;
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*yptr++ = y0 = cell->y[0]; *uptr++ = u = cell->u; *vptr++ = v = cell->v;
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*yptr++ = y0;
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*yptr++ = y1 = cell->y[1]; *uptr++ = u; *vptr++ = v;
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*yptr++ = y1;
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yptr += row_inc;
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*yptr++ = y0;
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*yptr++ = y0;
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*yptr++ = y1;
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*yptr++ = y1;
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yptr += row_inc; uptr += c_row_inc; vptr += c_row_inc;
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*yptr++ = y0 = cell->y[2]; *uptr++ = u; *vptr++ = v;
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*yptr++ = y0;
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*yptr++ = y1 = cell->y[3]; *uptr++ = u; *vptr++ = v;
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*yptr++ = y1;
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yptr += row_inc;
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*yptr++ = y0;
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*yptr++ = y0;
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*yptr++ = y1;
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*yptr++ = y1;
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}
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void ff_apply_motion_4x4(RoqContext *ri, int x, int y,
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int deltax, int deltay)
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{
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int i, hw, mx, my;
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unsigned char *pa, *pb;
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mx = x + deltax;
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my = y + deltay;
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/* check MV against frame boundaries */
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if ((mx < 0) || (mx > ri->avctx->width - 4) ||
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(my < 0) || (my > ri->avctx->height - 4)) {
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av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
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mx, my, ri->avctx->width, ri->avctx->height);
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return;
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}
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pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
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pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
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for(i = 0; i < 4; i++) {
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pa[0] = pb[0];
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pa[1] = pb[1];
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pa[2] = pb[2];
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pa[3] = pb[3];
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pa += ri->y_stride;
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pb += ri->y_stride;
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}
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hw = ri->y_stride/2;
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pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
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pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
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for(i = 0; i < 2; i++) {
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switch(((my & 0x01) << 1) | (mx & 0x01)) {
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case 0:
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pa[0] = pb[0];
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pa[1] = pb[1];
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pa[hw] = pb[hw];
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pa[hw+1] = pb[hw+1];
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break;
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case 1:
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pa[0] = avg2(pb[0], pb[1]);
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pa[1] = avg2(pb[1], pb[2]);
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pa[hw] = avg2(pb[hw], pb[hw+1]);
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pa[hw+1] = avg2(pb[hw+1], pb[hw+2]);
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break;
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case 2:
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pa[0] = avg2(pb[0], pb[hw]);
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pa[1] = avg2(pb[1], pb[hw+1]);
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pa[hw] = avg2(pb[hw], pb[hw*2]);
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pa[hw+1] = avg2(pb[hw+1], pb[(hw*2)+1]);
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break;
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case 3:
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pa[0] = avg4(pb[0], pb[1], pb[hw], pb[hw+1]);
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pa[1] = avg4(pb[1], pb[2], pb[hw+1], pb[hw+2]);
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pa[hw] = avg4(pb[hw], pb[hw+1], pb[hw*2], pb[(hw*2)+1]);
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pa[hw+1] = avg4(pb[hw+1], pb[hw+2], pb[(hw*2)+1], pb[(hw*2)+1]);
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break;
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}
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pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
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pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
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}
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}
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void ff_apply_motion_8x8(RoqContext *ri, int x, int y,
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int deltax, int deltay)
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{
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int mx, my, i, j, hw;
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unsigned char *pa, *pb;
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mx = x + deltax;
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my = y + deltay;
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/* check MV against frame boundaries */
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if ((mx < 0) || (mx > ri->avctx->width - 8) ||
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(my < 0) || (my > ri->avctx->height - 8)) {
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av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
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mx, my, ri->avctx->width, ri->avctx->height);
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return;
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}
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pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
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pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
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for(i = 0; i < 8; i++) {
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pa[0] = pb[0];
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pa[1] = pb[1];
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pa[2] = pb[2];
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pa[3] = pb[3];
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pa[4] = pb[4];
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pa[5] = pb[5];
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pa[6] = pb[6];
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pa[7] = pb[7];
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pa += ri->y_stride;
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pb += ri->y_stride;
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}
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hw = ri->c_stride;
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pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
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pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
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for(j = 0; j < 2; j++) {
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for(i = 0; i < 4; i++) {
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switch(((my & 0x01) << 1) | (mx & 0x01)) {
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case 0:
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pa[0] = pb[0];
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pa[1] = pb[1];
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pa[2] = pb[2];
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pa[3] = pb[3];
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break;
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case 1:
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pa[0] = avg2(pb[0], pb[1]);
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pa[1] = avg2(pb[1], pb[2]);
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pa[2] = avg2(pb[2], pb[3]);
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pa[3] = avg2(pb[3], pb[4]);
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break;
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case 2:
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pa[0] = avg2(pb[0], pb[hw]);
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pa[1] = avg2(pb[1], pb[hw+1]);
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pa[2] = avg2(pb[2], pb[hw+2]);
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pa[3] = avg2(pb[3], pb[hw+3]);
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break;
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case 3:
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pa[0] = avg4(pb[0], pb[1], pb[hw], pb[hw+1]);
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pa[1] = avg4(pb[1], pb[2], pb[hw+1], pb[hw+2]);
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pa[2] = avg4(pb[2], pb[3], pb[hw+2], pb[hw+3]);
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pa[3] = avg4(pb[3], pb[4], pb[hw+3], pb[hw+4]);
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break;
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}
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pa += ri->c_stride;
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pb += ri->c_stride;
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}
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pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
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pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
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}
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}
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