mirror of
https://github.com/xenia-project/FFmpeg.git
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354 lines
17 KiB
C
354 lines
17 KiB
C
/*
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* RV40 decoder motion compensation functions
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* Copyright (c) 2008 Konstantin Shishkov
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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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* @file
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* RV40 decoder motion compensation functions
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*/
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#include "avcodec.h"
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#include "dsputil.h"
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#define RV40_LOWPASS(OPNAME, OP) \
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static av_unused void OPNAME ## rv40_qpel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
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const int h, const int C1, const int C2, const int SHIFT){\
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uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
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int i;\
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for(i=0; i<h; i++)\
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{\
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OP(dst[0], (src[-2] + src[ 3] - 5*(src[-1]+src[2]) + src[0]*C1 + src[1]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[1], (src[-1] + src[ 4] - 5*(src[ 0]+src[3]) + src[1]*C1 + src[2]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[2], (src[ 0] + src[ 5] - 5*(src[ 1]+src[4]) + src[2]*C1 + src[3]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[3], (src[ 1] + src[ 6] - 5*(src[ 2]+src[5]) + src[3]*C1 + src[4]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[4], (src[ 2] + src[ 7] - 5*(src[ 3]+src[6]) + src[4]*C1 + src[5]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[5], (src[ 3] + src[ 8] - 5*(src[ 4]+src[7]) + src[5]*C1 + src[6]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[6], (src[ 4] + src[ 9] - 5*(src[ 5]+src[8]) + src[6]*C1 + src[7]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[7], (src[ 5] + src[10] - 5*(src[ 6]+src[9]) + src[7]*C1 + src[8]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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dst+=dstStride;\
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src+=srcStride;\
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}\
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}\
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\
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static void OPNAME ## rv40_qpel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
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const int w, const int C1, const int C2, const int SHIFT){\
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uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
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int i;\
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for(i=0; i<w; i++)\
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{\
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const int srcB = src[-2*srcStride];\
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const int srcA = src[-1*srcStride];\
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const int src0 = src[0 *srcStride];\
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const int src1 = src[1 *srcStride];\
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const int src2 = src[2 *srcStride];\
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const int src3 = src[3 *srcStride];\
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const int src4 = src[4 *srcStride];\
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const int src5 = src[5 *srcStride];\
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const int src6 = src[6 *srcStride];\
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const int src7 = src[7 *srcStride];\
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const int src8 = src[8 *srcStride];\
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const int src9 = src[9 *srcStride];\
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const int src10= src[10*srcStride];\
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OP(dst[0*dstStride], (srcB + src3 - 5*(srcA+src2) + src0*C1 + src1*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[1*dstStride], (srcA + src4 - 5*(src0+src3) + src1*C1 + src2*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[2*dstStride], (src0 + src5 - 5*(src1+src4) + src2*C1 + src3*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[3*dstStride], (src1 + src6 - 5*(src2+src5) + src3*C1 + src4*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[4*dstStride], (src2 + src7 - 5*(src3+src6) + src4*C1 + src5*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[5*dstStride], (src3 + src8 - 5*(src4+src7) + src5*C1 + src6*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[6*dstStride], (src4 + src9 - 5*(src5+src8) + src6*C1 + src7*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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OP(dst[7*dstStride], (src5 + src10 - 5*(src6+src9) + src7*C1 + src8*C2 + (1<<(SHIFT-1))) >> SHIFT);\
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dst++;\
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src++;\
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}\
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}\
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\
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static void OPNAME ## rv40_qpel16_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
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const int w, const int C1, const int C2, const int SHIFT){\
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OPNAME ## rv40_qpel8_v_lowpass(dst , src , dstStride, srcStride, 8, C1, C2, SHIFT);\
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OPNAME ## rv40_qpel8_v_lowpass(dst+8, src+8, dstStride, srcStride, 8, C1, C2, SHIFT);\
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src += 8*srcStride;\
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dst += 8*dstStride;\
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OPNAME ## rv40_qpel8_v_lowpass(dst , src , dstStride, srcStride, w-8, C1, C2, SHIFT);\
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OPNAME ## rv40_qpel8_v_lowpass(dst+8, src+8, dstStride, srcStride, w-8, C1, C2, SHIFT);\
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}\
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\
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static void OPNAME ## rv40_qpel16_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
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const int h, const int C1, const int C2, const int SHIFT){\
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OPNAME ## rv40_qpel8_h_lowpass(dst , src , dstStride, srcStride, 8, C1, C2, SHIFT);\
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OPNAME ## rv40_qpel8_h_lowpass(dst+8, src+8, dstStride, srcStride, 8, C1, C2, SHIFT);\
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src += 8*srcStride;\
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dst += 8*dstStride;\
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OPNAME ## rv40_qpel8_h_lowpass(dst , src , dstStride, srcStride, h-8, C1, C2, SHIFT);\
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OPNAME ## rv40_qpel8_h_lowpass(dst+8, src+8, dstStride, srcStride, h-8, C1, C2, SHIFT);\
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}\
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\
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#define RV40_MC(OPNAME, SIZE) \
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static void OPNAME ## rv40_qpel ## SIZE ## _mc10_c(uint8_t *dst, uint8_t *src, int stride){\
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OPNAME ## rv40_qpel ## SIZE ## _h_lowpass(dst, src, stride, stride, SIZE, 52, 20, 6);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc20_c(uint8_t *dst, uint8_t *src, int stride){\
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OPNAME ## rv40_qpel ## SIZE ## _h_lowpass(dst, src, stride, stride, SIZE, 20, 20, 5);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc30_c(uint8_t *dst, uint8_t *src, int stride){\
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OPNAME ## rv40_qpel ## SIZE ## _h_lowpass(dst, src, stride, stride, SIZE, 20, 52, 6);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc01_c(uint8_t *dst, uint8_t *src, int stride){\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, src, stride, stride, SIZE, 52, 20, 6);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc11_c(uint8_t *dst, uint8_t *src, int stride){\
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uint8_t full[SIZE*(SIZE+5)];\
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uint8_t * const full_mid= full + SIZE*2;\
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put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 52, 20, 6);\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 52, 20, 6);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc21_c(uint8_t *dst, uint8_t *src, int stride){\
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uint8_t full[SIZE*(SIZE+5)];\
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uint8_t * const full_mid= full + SIZE*2;\
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put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 20, 5);\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 52, 20, 6);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc31_c(uint8_t *dst, uint8_t *src, int stride){\
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uint8_t full[SIZE*(SIZE+5)];\
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uint8_t * const full_mid= full + SIZE*2;\
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put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 52, 6);\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 52, 20, 6);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc02_c(uint8_t *dst, uint8_t *src, int stride){\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, src, stride, stride, SIZE, 20, 20, 5);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc12_c(uint8_t *dst, uint8_t *src, int stride){\
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uint8_t full[SIZE*(SIZE+5)];\
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uint8_t * const full_mid= full + SIZE*2;\
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put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 52, 20, 6);\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 20, 5);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc22_c(uint8_t *dst, uint8_t *src, int stride){\
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uint8_t full[SIZE*(SIZE+5)];\
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uint8_t * const full_mid= full + SIZE*2;\
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put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 20, 5);\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 20, 5);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc32_c(uint8_t *dst, uint8_t *src, int stride){\
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uint8_t full[SIZE*(SIZE+5)];\
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uint8_t * const full_mid= full + SIZE*2;\
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put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 52, 6);\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 20, 5);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc03_c(uint8_t *dst, uint8_t *src, int stride){\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, src, stride, stride, SIZE, 20, 52, 6);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc13_c(uint8_t *dst, uint8_t *src, int stride){\
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uint8_t full[SIZE*(SIZE+5)];\
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uint8_t * const full_mid= full + SIZE*2;\
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put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 52, 20, 6);\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 52, 6);\
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}\
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\
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static void OPNAME ## rv40_qpel ## SIZE ## _mc23_c(uint8_t *dst, uint8_t *src, int stride){\
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uint8_t full[SIZE*(SIZE+5)];\
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uint8_t * const full_mid= full + SIZE*2;\
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put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 20, 5);\
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OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 52, 6);\
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}\
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\
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#define op_avg(a, b) a = (((a)+cm[b]+1)>>1)
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#define op_put(a, b) a = cm[b]
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RV40_LOWPASS(put_ , op_put)
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RV40_LOWPASS(avg_ , op_avg)
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#undef op_avg
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#undef op_put
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RV40_MC(put_, 8)
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RV40_MC(put_, 16)
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RV40_MC(avg_, 8)
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RV40_MC(avg_, 16)
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static const int rv40_bias[4][4] = {
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{ 0, 16, 32, 16 },
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{ 32, 28, 32, 28 },
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{ 0, 32, 16, 32 },
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{ 32, 28, 32, 28 }
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};
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#define RV40_CHROMA_MC(OPNAME, OP)\
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static void OPNAME ## rv40_chroma_mc4_c(uint8_t *dst/*align 8*/, uint8_t *src/*align 1*/, int stride, int h, int x, int y){\
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const int A=(8-x)*(8-y);\
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const int B=( x)*(8-y);\
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const int C=(8-x)*( y);\
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const int D=( x)*( y);\
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int i;\
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int bias = rv40_bias[y>>1][x>>1];\
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\
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assert(x<8 && y<8 && x>=0 && y>=0);\
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\
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if(D){\
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for(i=0; i<h; i++){\
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OP(dst[0], (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + bias));\
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OP(dst[1], (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + bias));\
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OP(dst[2], (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + bias));\
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OP(dst[3], (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + bias));\
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dst+= stride;\
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src+= stride;\
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}\
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}else{\
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const int E= B+C;\
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const int step= C ? stride : 1;\
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for(i=0; i<h; i++){\
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OP(dst[0], (A*src[0] + E*src[step+0] + bias));\
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OP(dst[1], (A*src[1] + E*src[step+1] + bias));\
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OP(dst[2], (A*src[2] + E*src[step+2] + bias));\
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OP(dst[3], (A*src[3] + E*src[step+3] + bias));\
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dst+= stride;\
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src+= stride;\
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}\
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}\
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}\
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\
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static void OPNAME ## rv40_chroma_mc8_c(uint8_t *dst/*align 8*/, uint8_t *src/*align 1*/, int stride, int h, int x, int y){\
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const int A=(8-x)*(8-y);\
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const int B=( x)*(8-y);\
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const int C=(8-x)*( y);\
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const int D=( x)*( y);\
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int i;\
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int bias = rv40_bias[y>>1][x>>1];\
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\
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assert(x<8 && y<8 && x>=0 && y>=0);\
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\
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if(D){\
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for(i=0; i<h; i++){\
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OP(dst[0], (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + bias));\
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OP(dst[1], (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + bias));\
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OP(dst[2], (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + bias));\
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OP(dst[3], (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + bias));\
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OP(dst[4], (A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + bias));\
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OP(dst[5], (A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + bias));\
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OP(dst[6], (A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + bias));\
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OP(dst[7], (A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + bias));\
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dst+= stride;\
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src+= stride;\
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}\
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}else{\
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const int E= B+C;\
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const int step= C ? stride : 1;\
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for(i=0; i<h; i++){\
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OP(dst[0], (A*src[0] + E*src[step+0] + bias));\
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OP(dst[1], (A*src[1] + E*src[step+1] + bias));\
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OP(dst[2], (A*src[2] + E*src[step+2] + bias));\
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OP(dst[3], (A*src[3] + E*src[step+3] + bias));\
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OP(dst[4], (A*src[4] + E*src[step+4] + bias));\
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OP(dst[5], (A*src[5] + E*src[step+5] + bias));\
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OP(dst[6], (A*src[6] + E*src[step+6] + bias));\
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OP(dst[7], (A*src[7] + E*src[step+7] + bias));\
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dst+= stride;\
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src+= stride;\
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}\
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}\
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}
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#define op_avg(a, b) a = (((a)+((b)>>6)+1)>>1)
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#define op_put(a, b) a = ((b)>>6)
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RV40_CHROMA_MC(put_, op_put)
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RV40_CHROMA_MC(avg_, op_avg)
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void ff_rv40dsp_init(DSPContext* c, AVCodecContext *avctx) {
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c->put_rv40_qpel_pixels_tab[0][ 0] = c->put_h264_qpel_pixels_tab[0][0];
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c->put_rv40_qpel_pixels_tab[0][ 1] = put_rv40_qpel16_mc10_c;
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c->put_rv40_qpel_pixels_tab[0][ 2] = put_rv40_qpel16_mc20_c;
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c->put_rv40_qpel_pixels_tab[0][ 3] = put_rv40_qpel16_mc30_c;
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c->put_rv40_qpel_pixels_tab[0][ 4] = put_rv40_qpel16_mc01_c;
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c->put_rv40_qpel_pixels_tab[0][ 5] = put_rv40_qpel16_mc11_c;
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c->put_rv40_qpel_pixels_tab[0][ 6] = put_rv40_qpel16_mc21_c;
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c->put_rv40_qpel_pixels_tab[0][ 7] = put_rv40_qpel16_mc31_c;
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c->put_rv40_qpel_pixels_tab[0][ 8] = put_rv40_qpel16_mc02_c;
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c->put_rv40_qpel_pixels_tab[0][ 9] = put_rv40_qpel16_mc12_c;
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c->put_rv40_qpel_pixels_tab[0][10] = put_rv40_qpel16_mc22_c;
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c->put_rv40_qpel_pixels_tab[0][11] = put_rv40_qpel16_mc32_c;
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c->put_rv40_qpel_pixels_tab[0][12] = put_rv40_qpel16_mc03_c;
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c->put_rv40_qpel_pixels_tab[0][13] = put_rv40_qpel16_mc13_c;
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c->put_rv40_qpel_pixels_tab[0][14] = put_rv40_qpel16_mc23_c;
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c->avg_rv40_qpel_pixels_tab[0][ 0] = c->avg_h264_qpel_pixels_tab[0][0];
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c->avg_rv40_qpel_pixels_tab[0][ 1] = avg_rv40_qpel16_mc10_c;
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c->avg_rv40_qpel_pixels_tab[0][ 2] = avg_rv40_qpel16_mc20_c;
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c->avg_rv40_qpel_pixels_tab[0][ 3] = avg_rv40_qpel16_mc30_c;
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c->avg_rv40_qpel_pixels_tab[0][ 4] = avg_rv40_qpel16_mc01_c;
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c->avg_rv40_qpel_pixels_tab[0][ 5] = avg_rv40_qpel16_mc11_c;
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c->avg_rv40_qpel_pixels_tab[0][ 6] = avg_rv40_qpel16_mc21_c;
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c->avg_rv40_qpel_pixels_tab[0][ 7] = avg_rv40_qpel16_mc31_c;
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c->avg_rv40_qpel_pixels_tab[0][ 8] = avg_rv40_qpel16_mc02_c;
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c->avg_rv40_qpel_pixels_tab[0][ 9] = avg_rv40_qpel16_mc12_c;
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c->avg_rv40_qpel_pixels_tab[0][10] = avg_rv40_qpel16_mc22_c;
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c->avg_rv40_qpel_pixels_tab[0][11] = avg_rv40_qpel16_mc32_c;
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c->avg_rv40_qpel_pixels_tab[0][12] = avg_rv40_qpel16_mc03_c;
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c->avg_rv40_qpel_pixels_tab[0][13] = avg_rv40_qpel16_mc13_c;
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c->avg_rv40_qpel_pixels_tab[0][14] = avg_rv40_qpel16_mc23_c;
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c->put_rv40_qpel_pixels_tab[1][ 0] = c->put_h264_qpel_pixels_tab[1][0];
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c->put_rv40_qpel_pixels_tab[1][ 1] = put_rv40_qpel8_mc10_c;
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c->put_rv40_qpel_pixels_tab[1][ 2] = put_rv40_qpel8_mc20_c;
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c->put_rv40_qpel_pixels_tab[1][ 3] = put_rv40_qpel8_mc30_c;
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c->put_rv40_qpel_pixels_tab[1][ 4] = put_rv40_qpel8_mc01_c;
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c->put_rv40_qpel_pixels_tab[1][ 5] = put_rv40_qpel8_mc11_c;
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c->put_rv40_qpel_pixels_tab[1][ 6] = put_rv40_qpel8_mc21_c;
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c->put_rv40_qpel_pixels_tab[1][ 7] = put_rv40_qpel8_mc31_c;
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c->put_rv40_qpel_pixels_tab[1][ 8] = put_rv40_qpel8_mc02_c;
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c->put_rv40_qpel_pixels_tab[1][ 9] = put_rv40_qpel8_mc12_c;
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c->put_rv40_qpel_pixels_tab[1][10] = put_rv40_qpel8_mc22_c;
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c->put_rv40_qpel_pixels_tab[1][11] = put_rv40_qpel8_mc32_c;
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c->put_rv40_qpel_pixels_tab[1][12] = put_rv40_qpel8_mc03_c;
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c->put_rv40_qpel_pixels_tab[1][13] = put_rv40_qpel8_mc13_c;
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c->put_rv40_qpel_pixels_tab[1][14] = put_rv40_qpel8_mc23_c;
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c->avg_rv40_qpel_pixels_tab[1][ 0] = c->avg_h264_qpel_pixels_tab[1][0];
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c->avg_rv40_qpel_pixels_tab[1][ 1] = avg_rv40_qpel8_mc10_c;
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c->avg_rv40_qpel_pixels_tab[1][ 2] = avg_rv40_qpel8_mc20_c;
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c->avg_rv40_qpel_pixels_tab[1][ 3] = avg_rv40_qpel8_mc30_c;
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c->avg_rv40_qpel_pixels_tab[1][ 4] = avg_rv40_qpel8_mc01_c;
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c->avg_rv40_qpel_pixels_tab[1][ 5] = avg_rv40_qpel8_mc11_c;
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c->avg_rv40_qpel_pixels_tab[1][ 6] = avg_rv40_qpel8_mc21_c;
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c->avg_rv40_qpel_pixels_tab[1][ 7] = avg_rv40_qpel8_mc31_c;
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c->avg_rv40_qpel_pixels_tab[1][ 8] = avg_rv40_qpel8_mc02_c;
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c->avg_rv40_qpel_pixels_tab[1][ 9] = avg_rv40_qpel8_mc12_c;
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c->avg_rv40_qpel_pixels_tab[1][10] = avg_rv40_qpel8_mc22_c;
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c->avg_rv40_qpel_pixels_tab[1][11] = avg_rv40_qpel8_mc32_c;
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c->avg_rv40_qpel_pixels_tab[1][12] = avg_rv40_qpel8_mc03_c;
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c->avg_rv40_qpel_pixels_tab[1][13] = avg_rv40_qpel8_mc13_c;
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c->avg_rv40_qpel_pixels_tab[1][14] = avg_rv40_qpel8_mc23_c;
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c->put_rv40_chroma_pixels_tab[0]= put_rv40_chroma_mc8_c;
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c->put_rv40_chroma_pixels_tab[1]= put_rv40_chroma_mc4_c;
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c->avg_rv40_chroma_pixels_tab[0]= avg_rv40_chroma_mc8_c;
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c->avg_rv40_chroma_pixels_tab[1]= avg_rv40_chroma_mc4_c;
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}
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