FFmpeg/libavcodec/rv40dsp.c

/*
 * RV40 decoder motion compensation functions
 * Copyright (c) 2008 Konstantin Shishkov
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * RV40 decoder motion compensation functions
 */

#include "avcodec.h"
#include "dsputil.h"
#include "rv34dsp.h"

#define RV40_LOWPASS(OPNAME, OP) \
static av_unused void OPNAME ## rv40_qpel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
                                                     const int h, const int C1, const int C2, const int SHIFT){\
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
    int i;\
    for(i = 0; i < h; i++)\
    {\
        OP(dst[0], (src[-2] + src[ 3] - 5*(src[-1]+src[2]) + src[0]*C1 + src[1]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[1], (src[-1] + src[ 4] - 5*(src[ 0]+src[3]) + src[1]*C1 + src[2]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[2], (src[ 0] + src[ 5] - 5*(src[ 1]+src[4]) + src[2]*C1 + src[3]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[3], (src[ 1] + src[ 6] - 5*(src[ 2]+src[5]) + src[3]*C1 + src[4]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[4], (src[ 2] + src[ 7] - 5*(src[ 3]+src[6]) + src[4]*C1 + src[5]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[5], (src[ 3] + src[ 8] - 5*(src[ 4]+src[7]) + src[5]*C1 + src[6]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[6], (src[ 4] + src[ 9] - 5*(src[ 5]+src[8]) + src[6]*C1 + src[7]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[7], (src[ 5] + src[10] - 5*(src[ 6]+src[9]) + src[7]*C1 + src[8]*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        dst += dstStride;\
        src += srcStride;\
    }\
}\
\
static void OPNAME ## rv40_qpel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
                                           const int w, const int C1, const int C2, const int SHIFT){\
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
    int i;\
    for(i = 0; i < w; i++)\
    {\
        const int srcB  = src[-2*srcStride];\
        const int srcA  = src[-1*srcStride];\
        const int src0  = src[0 *srcStride];\
        const int src1  = src[1 *srcStride];\
        const int src2  = src[2 *srcStride];\
        const int src3  = src[3 *srcStride];\
        const int src4  = src[4 *srcStride];\
        const int src5  = src[5 *srcStride];\
        const int src6  = src[6 *srcStride];\
        const int src7  = src[7 *srcStride];\
        const int src8  = src[8 *srcStride];\
        const int src9  = src[9 *srcStride];\
        const int src10 = src[10*srcStride];\
        OP(dst[0*dstStride], (srcB + src3  - 5*(srcA+src2) + src0*C1 + src1*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[1*dstStride], (srcA + src4  - 5*(src0+src3) + src1*C1 + src2*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[2*dstStride], (src0 + src5  - 5*(src1+src4) + src2*C1 + src3*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[3*dstStride], (src1 + src6  - 5*(src2+src5) + src3*C1 + src4*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[4*dstStride], (src2 + src7  - 5*(src3+src6) + src4*C1 + src5*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[5*dstStride], (src3 + src8  - 5*(src4+src7) + src5*C1 + src6*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[6*dstStride], (src4 + src9  - 5*(src5+src8) + src6*C1 + src7*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        OP(dst[7*dstStride], (src5 + src10 - 5*(src6+src9) + src7*C1 + src8*C2 + (1<<(SHIFT-1))) >> SHIFT);\
        dst++;\
        src++;\
    }\
}\
\
static void OPNAME ## rv40_qpel16_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
                                            const int w, const int C1, const int C2, const int SHIFT){\
    OPNAME ## rv40_qpel8_v_lowpass(dst  , src  , dstStride, srcStride, 8, C1, C2, SHIFT);\
    OPNAME ## rv40_qpel8_v_lowpass(dst+8, src+8, dstStride, srcStride, 8, C1, C2, SHIFT);\
    src += 8*srcStride;\
    dst += 8*dstStride;\
    OPNAME ## rv40_qpel8_v_lowpass(dst  , src  , dstStride, srcStride, w-8, C1, C2, SHIFT);\
    OPNAME ## rv40_qpel8_v_lowpass(dst+8, src+8, dstStride, srcStride, w-8, C1, C2, SHIFT);\
}\
\
static void OPNAME ## rv40_qpel16_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
                                            const int h, const int C1, const int C2, const int SHIFT){\
    OPNAME ## rv40_qpel8_h_lowpass(dst  , src  , dstStride, srcStride, 8, C1, C2, SHIFT);\
    OPNAME ## rv40_qpel8_h_lowpass(dst+8, src+8, dstStride, srcStride, 8, C1, C2, SHIFT);\
    src += 8*srcStride;\
    dst += 8*dstStride;\
    OPNAME ## rv40_qpel8_h_lowpass(dst  , src  , dstStride, srcStride, h-8, C1, C2, SHIFT);\
    OPNAME ## rv40_qpel8_h_lowpass(dst+8, src+8, dstStride, srcStride, h-8, C1, C2, SHIFT);\
}\
\

#define RV40_MC(OPNAME, SIZE) \
static void OPNAME ## rv40_qpel ## SIZE ## _mc10_c(uint8_t *dst, uint8_t *src, int stride){\
    OPNAME ## rv40_qpel ## SIZE ## _h_lowpass(dst, src, stride, stride, SIZE, 52, 20, 6);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc30_c(uint8_t *dst, uint8_t *src, int stride){\
    OPNAME ## rv40_qpel ## SIZE ## _h_lowpass(dst, src, stride, stride, SIZE, 20, 52, 6);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc01_c(uint8_t *dst, uint8_t *src, int stride){\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, src, stride, stride, SIZE, 52, 20, 6);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc11_c(uint8_t *dst, uint8_t *src, int stride){\
    uint8_t full[SIZE*(SIZE+5)];\
    uint8_t * const full_mid = full + SIZE*2;\
    put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 52, 20, 6);\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 52, 20, 6);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc21_c(uint8_t *dst, uint8_t *src, int stride){\
    uint8_t full[SIZE*(SIZE+5)];\
    uint8_t * const full_mid = full + SIZE*2;\
    put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 20, 5);\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 52, 20, 6);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc31_c(uint8_t *dst, uint8_t *src, int stride){\
    uint8_t full[SIZE*(SIZE+5)];\
    uint8_t * const full_mid = full + SIZE*2;\
    put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 52, 6);\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 52, 20, 6);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc12_c(uint8_t *dst, uint8_t *src, int stride){\
    uint8_t full[SIZE*(SIZE+5)];\
    uint8_t * const full_mid = full + SIZE*2;\
    put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 52, 20, 6);\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 20, 5);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc22_c(uint8_t *dst, uint8_t *src, int stride){\
    uint8_t full[SIZE*(SIZE+5)];\
    uint8_t * const full_mid = full + SIZE*2;\
    put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 20, 5);\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 20, 5);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc32_c(uint8_t *dst, uint8_t *src, int stride){\
    uint8_t full[SIZE*(SIZE+5)];\
    uint8_t * const full_mid = full + SIZE*2;\
    put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 52, 6);\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 20, 5);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc03_c(uint8_t *dst, uint8_t *src, int stride){\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, src, stride, stride, SIZE, 20, 52, 6);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc13_c(uint8_t *dst, uint8_t *src, int stride){\
    uint8_t full[SIZE*(SIZE+5)];\
    uint8_t * const full_mid = full + SIZE*2;\
    put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 52, 20, 6);\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 52, 6);\
}\
\
static void OPNAME ## rv40_qpel ## SIZE ## _mc23_c(uint8_t *dst, uint8_t *src, int stride){\
    uint8_t full[SIZE*(SIZE+5)];\
    uint8_t * const full_mid = full + SIZE*2;\
    put_rv40_qpel ## SIZE ## _h_lowpass(full, src - 2*stride, SIZE, stride, SIZE+5, 20, 20, 5);\
    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 20, 52, 6);\
}\
\

#define op_avg(a, b)  a = (((a)+cm[b]+1)>>1)
#define op_put(a, b)  a = cm[b]

RV40_LOWPASS(put_       , op_put)
RV40_LOWPASS(avg_       , op_avg)

#undef op_avg
#undef op_put

RV40_MC(put_, 8)
RV40_MC(put_, 16)
RV40_MC(avg_, 8)
RV40_MC(avg_, 16)

static const int rv40_bias[4][4] = {
    {  0, 16, 32, 16 },
    { 32, 28, 32, 28 },
    {  0, 32, 16, 32 },
    { 32, 28, 32, 28 }
};

#define RV40_CHROMA_MC(OPNAME, OP)\
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){\
    const int A = (8-x) * (8-y);\
    const int B = (  x) * (8-y);\
    const int C = (8-x) * (  y);\
    const int D = (  x) * (  y);\
    int i;\
    int bias = rv40_bias[y>>1][x>>1];\
    \
    assert(x<8 && y<8 && x>=0 && y>=0);\
\
    if(D){\
        for(i = 0; i < h; i++){\
            OP(dst[0], (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + bias));\
            OP(dst[1], (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + bias));\
            OP(dst[2], (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + bias));\
            OP(dst[3], (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + bias));\
            dst += stride;\
            src += stride;\
        }\
    }else{\
        const int E = B + C;\
        const int step = C ? stride : 1;\
        for(i = 0; i < h; i++){\
            OP(dst[0], (A*src[0] + E*src[step+0] + bias));\
            OP(dst[1], (A*src[1] + E*src[step+1] + bias));\
            OP(dst[2], (A*src[2] + E*src[step+2] + bias));\
            OP(dst[3], (A*src[3] + E*src[step+3] + bias));\
            dst += stride;\
            src += stride;\
        }\
    }\
}\
\
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){\
    const int A = (8-x) * (8-y);\
    const int B = (  x) * (8-y);\
    const int C = (8-x) * (  y);\
    const int D = (  x) * (  y);\
    int i;\
    int bias = rv40_bias[y>>1][x>>1];\
    \
    assert(x<8 && y<8 && x>=0 && y>=0);\
\
    if(D){\
        for(i = 0; i < h; i++){\
            OP(dst[0], (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + bias));\
            OP(dst[1], (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + bias));\
            OP(dst[2], (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + bias));\
            OP(dst[3], (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + bias));\
            OP(dst[4], (A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + bias));\
            OP(dst[5], (A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + bias));\
            OP(dst[6], (A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + bias));\
            OP(dst[7], (A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + bias));\
            dst += stride;\
            src += stride;\
        }\
    }else{\
        const int E = B + C;\
        const int step = C ? stride : 1;\
        for(i = 0; i < h; i++){\
            OP(dst[0], (A*src[0] + E*src[step+0] + bias));\
            OP(dst[1], (A*src[1] + E*src[step+1] + bias));\
            OP(dst[2], (A*src[2] + E*src[step+2] + bias));\
            OP(dst[3], (A*src[3] + E*src[step+3] + bias));\
            OP(dst[4], (A*src[4] + E*src[step+4] + bias));\
            OP(dst[5], (A*src[5] + E*src[step+5] + bias));\
            OP(dst[6], (A*src[6] + E*src[step+6] + bias));\
            OP(dst[7], (A*src[7] + E*src[step+7] + bias));\
            dst += stride;\
            src += stride;\
        }\
    }\
}

#define op_avg(a, b) a = (((a)+((b)>>6)+1)>>1)
#define op_put(a, b) a = ((b)>>6)

RV40_CHROMA_MC(put_, op_put)
RV40_CHROMA_MC(avg_, op_avg)

#define RV40_WEIGHT_FUNC(size) \
static void rv40_weight_func_ ## size (uint8_t *dst, uint8_t *src1, uint8_t *src2, int w1, int w2, int stride)\
{\
    int i, j;\
\
    for (j = 0; j < size; j++) {\
        for (i = 0; i < size; i++)\
            dst[i] = (((w2 * src1[i]) >> 9) + ((w1 * src2[i]) >> 9) + 0x10) >> 5;\
        src1 += stride;\
        src2 += stride;\
        dst  += stride;\
    }\
}

RV40_WEIGHT_FUNC(16)
RV40_WEIGHT_FUNC(8)

av_cold void ff_rv40dsp_init(RV34DSPContext *c, DSPContext* dsp) {
    c->put_pixels_tab[0][ 0] = dsp->put_h264_qpel_pixels_tab[0][0];
    c->put_pixels_tab[0][ 1] = put_rv40_qpel16_mc10_c;
    c->put_pixels_tab[0][ 2] = dsp->put_h264_qpel_pixels_tab[0][2];
    c->put_pixels_tab[0][ 3] = put_rv40_qpel16_mc30_c;
    c->put_pixels_tab[0][ 4] = put_rv40_qpel16_mc01_c;
    c->put_pixels_tab[0][ 5] = put_rv40_qpel16_mc11_c;
    c->put_pixels_tab[0][ 6] = put_rv40_qpel16_mc21_c;
    c->put_pixels_tab[0][ 7] = put_rv40_qpel16_mc31_c;
    c->put_pixels_tab[0][ 8] = dsp->put_h264_qpel_pixels_tab[0][8];
    c->put_pixels_tab[0][ 9] = put_rv40_qpel16_mc12_c;
    c->put_pixels_tab[0][10] = put_rv40_qpel16_mc22_c;
    c->put_pixels_tab[0][11] = put_rv40_qpel16_mc32_c;
    c->put_pixels_tab[0][12] = put_rv40_qpel16_mc03_c;
    c->put_pixels_tab[0][13] = put_rv40_qpel16_mc13_c;
    c->put_pixels_tab[0][14] = put_rv40_qpel16_mc23_c;
    c->put_pixels_tab[0][15] = ff_put_rv40_qpel16_mc33_c;
    c->avg_pixels_tab[0][ 0] = dsp->avg_h264_qpel_pixels_tab[0][0];
    c->avg_pixels_tab[0][ 1] = avg_rv40_qpel16_mc10_c;
    c->avg_pixels_tab[0][ 2] = dsp->avg_h264_qpel_pixels_tab[0][2];
    c->avg_pixels_tab[0][ 3] = avg_rv40_qpel16_mc30_c;
    c->avg_pixels_tab[0][ 4] = avg_rv40_qpel16_mc01_c;
    c->avg_pixels_tab[0][ 5] = avg_rv40_qpel16_mc11_c;
    c->avg_pixels_tab[0][ 6] = avg_rv40_qpel16_mc21_c;
    c->avg_pixels_tab[0][ 7] = avg_rv40_qpel16_mc31_c;
    c->avg_pixels_tab[0][ 8] = dsp->avg_h264_qpel_pixels_tab[0][8];
    c->avg_pixels_tab[0][ 9] = avg_rv40_qpel16_mc12_c;
    c->avg_pixels_tab[0][10] = avg_rv40_qpel16_mc22_c;
    c->avg_pixels_tab[0][11] = avg_rv40_qpel16_mc32_c;
    c->avg_pixels_tab[0][12] = avg_rv40_qpel16_mc03_c;
    c->avg_pixels_tab[0][13] = avg_rv40_qpel16_mc13_c;
    c->avg_pixels_tab[0][14] = avg_rv40_qpel16_mc23_c;
    c->avg_pixels_tab[0][15] = ff_avg_rv40_qpel16_mc33_c;
    c->put_pixels_tab[1][ 0] = dsp->put_h264_qpel_pixels_tab[1][0];
    c->put_pixels_tab[1][ 1] = put_rv40_qpel8_mc10_c;
    c->put_pixels_tab[1][ 2] = dsp->put_h264_qpel_pixels_tab[1][2];
    c->put_pixels_tab[1][ 3] = put_rv40_qpel8_mc30_c;
    c->put_pixels_tab[1][ 4] = put_rv40_qpel8_mc01_c;
    c->put_pixels_tab[1][ 5] = put_rv40_qpel8_mc11_c;
    c->put_pixels_tab[1][ 6] = put_rv40_qpel8_mc21_c;
    c->put_pixels_tab[1][ 7] = put_rv40_qpel8_mc31_c;
    c->put_pixels_tab[1][ 8] = dsp->put_h264_qpel_pixels_tab[1][8];
    c->put_pixels_tab[1][ 9] = put_rv40_qpel8_mc12_c;
    c->put_pixels_tab[1][10] = put_rv40_qpel8_mc22_c;
    c->put_pixels_tab[1][11] = put_rv40_qpel8_mc32_c;
    c->put_pixels_tab[1][12] = put_rv40_qpel8_mc03_c;
    c->put_pixels_tab[1][13] = put_rv40_qpel8_mc13_c;
    c->put_pixels_tab[1][14] = put_rv40_qpel8_mc23_c;
    c->put_pixels_tab[1][15] = ff_put_rv40_qpel8_mc33_c;
    c->avg_pixels_tab[1][ 0] = dsp->avg_h264_qpel_pixels_tab[1][0];
    c->avg_pixels_tab[1][ 1] = avg_rv40_qpel8_mc10_c;
    c->avg_pixels_tab[1][ 2] = dsp->avg_h264_qpel_pixels_tab[1][2];
    c->avg_pixels_tab[1][ 3] = avg_rv40_qpel8_mc30_c;
    c->avg_pixels_tab[1][ 4] = avg_rv40_qpel8_mc01_c;
    c->avg_pixels_tab[1][ 5] = avg_rv40_qpel8_mc11_c;
    c->avg_pixels_tab[1][ 6] = avg_rv40_qpel8_mc21_c;
    c->avg_pixels_tab[1][ 7] = avg_rv40_qpel8_mc31_c;
    c->avg_pixels_tab[1][ 8] = dsp->avg_h264_qpel_pixels_tab[1][8];
    c->avg_pixels_tab[1][ 9] = avg_rv40_qpel8_mc12_c;
    c->avg_pixels_tab[1][10] = avg_rv40_qpel8_mc22_c;
    c->avg_pixels_tab[1][11] = avg_rv40_qpel8_mc32_c;
    c->avg_pixels_tab[1][12] = avg_rv40_qpel8_mc03_c;
    c->avg_pixels_tab[1][13] = avg_rv40_qpel8_mc13_c;
    c->avg_pixels_tab[1][14] = avg_rv40_qpel8_mc23_c;
    c->avg_pixels_tab[1][15] = ff_avg_rv40_qpel8_mc33_c;

    c->put_chroma_pixels_tab[0] = put_rv40_chroma_mc8_c;
    c->put_chroma_pixels_tab[1] = put_rv40_chroma_mc4_c;
    c->avg_chroma_pixels_tab[0] = avg_rv40_chroma_mc8_c;
    c->avg_chroma_pixels_tab[1] = avg_rv40_chroma_mc4_c;

    c->rv40_weight_pixels_tab[0] = rv40_weight_func_16;
    c->rv40_weight_pixels_tab[1] = rv40_weight_func_8;

    if (HAVE_MMX)
        ff_rv40dsp_init_x86(c, dsp);
}