PeerStreamer

/*

 * VC-1 and WMV3 decoder - DSP functions

 * Copyright (c) 2006 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

 * VC-1 and WMV3 decoder

 *

 */

#include "vc1dsp.h"

/** Apply overlap transform to horizontal edge

*/

static void vc1_v_overlap_c(uint8_t* src, int stride)

{

    int i;

    int a, b, c, d;

    int d1, d2;

    int rnd = 1;

    for(i = 0; i < 8; i++) {

        a = src[-2*stride];

        b = src[-stride];

        c = src[0];

        d = src[stride];

        d1 = (a - d + 3 + rnd) >> 3;

        d2 = (a - d + b - c + 4 - rnd) >> 3;

        src[-2*stride] = a - d1;

        src[-stride] = av_clip_uint8(b - d2);

        src[0] = av_clip_uint8(c + d2);

        src[stride] = d + d1;

        src++;

        rnd = !rnd;

    }

}

/** Apply overlap transform to vertical edge

*/

static void vc1_h_overlap_c(uint8_t* src, int stride)

{

    int i;

    int a, b, c, d;

    int d1, d2;

    int rnd = 1;

    for(i = 0; i < 8; i++) {

        a = src[-2];

        b = src[-1];

        c = src[0];

        d = src[1];

        d1 = (a - d + 3 + rnd) >> 3;

        d2 = (a - d + b - c + 4 - rnd) >> 3;

        src[-2] = a - d1;

        src[-1] = av_clip_uint8(b - d2);

        src[0] = av_clip_uint8(c + d2);

        src[1] = d + d1;

        src += stride;

        rnd = !rnd;

    }

}

/**

 * VC-1 in-loop deblocking filter for one line

 * @param src source block type

 * @param stride block stride

 * @param pq block quantizer

 * @return whether other 3 pairs should be filtered or not

 * @see 8.6

 */

static av_always_inline int vc1_filter_line(uint8_t* src, int stride, int pq){

    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;

    int a0 = (2*(src[-2*stride] - src[ 1*stride]) - 5*(src[-1*stride] - src[ 0*stride]) + 4) >> 3;

    int a0_sign = a0 >> 31;        /* Store sign */

    a0 = (a0 ^ a0_sign) - a0_sign; /* a0 = FFABS(a0); */

    if(a0 < pq){

        int a1 = FFABS((2*(src[-4*stride] - src[-1*stride]) - 5*(src[-3*stride] - src[-2*stride]) + 4) >> 3);

        int a2 = FFABS((2*(src[ 0*stride] - src[ 3*stride]) - 5*(src[ 1*stride] - src[ 2*stride]) + 4) >> 3);

        if(a1 < a0 || a2 < a0){

            int clip = src[-1*stride] - src[ 0*stride];

            int clip_sign = clip >> 31;

            clip = ((clip ^ clip_sign) - clip_sign)>>1;

            if(clip){

                int a3 = FFMIN(a1, a2);

                int d = 5 * (a3 - a0);

                int d_sign = (d >> 31);

                d = ((d ^ d_sign) - d_sign) >> 3;

                d_sign ^= a0_sign;

                if( d_sign ^ clip_sign )

                    d = 0;

                else{

                    d = FFMIN(d, clip);

                    d = (d ^ d_sign) - d_sign;          /* Restore sign */

                    src[-1*stride] = cm[src[-1*stride] - d];

                    src[ 0*stride] = cm[src[ 0*stride] + d];

                }

                return 1;

            }

        }

    }

    return 0;

}

/**

 * VC-1 in-loop deblocking filter

 * @param src source block type

 * @param step distance between horizontally adjacent elements

 * @param stride distance between vertically adjacent elements

 * @param len edge length to filter (4 or 8 pixels)

 * @param pq block quantizer

 * @see 8.6

 */

static inline void vc1_loop_filter(uint8_t* src, int step, int stride, int len, int pq)

{

    int i;

    int filt3;

    for(i = 0; i < len; i += 4){

        filt3 = vc1_filter_line(src + 2*step, stride, pq);

        if(filt3){

            vc1_filter_line(src + 0*step, stride, pq);

            vc1_filter_line(src + 1*step, stride, pq);

            vc1_filter_line(src + 3*step, stride, pq);

        }

        src += step * 4;

    }

}

static void vc1_v_loop_filter4_c(uint8_t *src, int stride, int pq)

{

    vc1_loop_filter(src, 1, stride, 4, pq);

}

static void vc1_h_loop_filter4_c(uint8_t *src, int stride, int pq)

{

    vc1_loop_filter(src, stride, 1, 4, pq);

}

static void vc1_v_loop_filter8_c(uint8_t *src, int stride, int pq)

{

    vc1_loop_filter(src, 1, stride, 8, pq);

}

static void vc1_h_loop_filter8_c(uint8_t *src, int stride, int pq)

{

    vc1_loop_filter(src, stride, 1, 8, pq);

}

static void vc1_v_loop_filter16_c(uint8_t *src, int stride, int pq)

{

    vc1_loop_filter(src, 1, stride, 16, pq);

}

static void vc1_h_loop_filter16_c(uint8_t *src, int stride, int pq)

{

    vc1_loop_filter(src, stride, 1, 16, pq);

}

/** Do inverse transform on 8x8 block

*/

static void vc1_inv_trans_8x8_dc_c(uint8_t *dest, int linesize, DCTELEM *block)

{

    int i;

    int dc = block[0];

    const uint8_t *cm;

    dc = (3 * dc +  1) >> 1;

    dc = (3 * dc + 16) >> 5;

    cm = ff_cropTbl + MAX_NEG_CROP + dc;

    for(i = 0; i < 8; i++){

        dest[0] = cm[dest[0]];

        dest[1] = cm[dest[1]];

        dest[2] = cm[dest[2]];

        dest[3] = cm[dest[3]];

        dest[4] = cm[dest[4]];

        dest[5] = cm[dest[5]];

        dest[6] = cm[dest[6]];

        dest[7] = cm[dest[7]];

        dest += linesize;

    }

}

static void vc1_inv_trans_8x8_c(DCTELEM block[64])

{

    int i;

    register int t1,t2,t3,t4,t5,t6,t7,t8;

    DCTELEM *src, *dst, temp[64];

    src = block;

    dst = temp;

    for(i = 0; i < 8; i++){

        t1 = 12 * (src[ 0] + src[32]) + 4;

        t2 = 12 * (src[ 0] - src[32]) + 4;

        t3 = 16 * src[16] +  6 * src[48];

        t4 =  6 * src[16] - 16 * src[48];

        t5 = t1 + t3;

        t6 = t2 + t4;

        t7 = t2 - t4;

        t8 = t1 - t3;

        t1 = 16 * src[ 8] + 15 * src[24] +  9 * src[40] +  4 * src[56];

        t2 = 15 * src[ 8] -  4 * src[24] - 16 * src[40] -  9 * src[56];

        t3 =  9 * src[ 8] - 16 * src[24] +  4 * src[40] + 15 * src[56];

        t4 =  4 * src[ 8] -  9 * src[24] + 15 * src[40] - 16 * src[56];

        dst[0] = (t5 + t1) >> 3;

        dst[1] = (t6 + t2) >> 3;

        dst[2] = (t7 + t3) >> 3;

        dst[3] = (t8 + t4) >> 3;

        dst[4] = (t8 - t4) >> 3;

        dst[5] = (t7 - t3) >> 3;

        dst[6] = (t6 - t2) >> 3;

        dst[7] = (t5 - t1) >> 3;

        src += 1;

        dst += 8;

    }

    src = temp;

    dst = block;

    for(i = 0; i < 8; i++){

        t1 = 12 * (src[ 0] + src[32]) + 64;

        t2 = 12 * (src[ 0] - src[32]) + 64;

        t3 = 16 * src[16] +  6 * src[48];

        t4 =  6 * src[16] - 16 * src[48];

        t5 = t1 + t3;

        t6 = t2 + t4;

        t7 = t2 - t4;

        t8 = t1 - t3;

        t1 = 16 * src[ 8] + 15 * src[24] +  9 * src[40] +  4 * src[56];

        t2 = 15 * src[ 8] -  4 * src[24] - 16 * src[40] -  9 * src[56];

        t3 =  9 * src[ 8] - 16 * src[24] +  4 * src[40] + 15 * src[56];

        t4 =  4 * src[ 8] -  9 * src[24] + 15 * src[40] - 16 * src[56];

        dst[ 0] = (t5 + t1) >> 7;

        dst[ 8] = (t6 + t2) >> 7;

        dst[16] = (t7 + t3) >> 7;

        dst[24] = (t8 + t4) >> 7;

        dst[32] = (t8 - t4 + 1) >> 7;

        dst[40] = (t7 - t3 + 1) >> 7;

        dst[48] = (t6 - t2 + 1) >> 7;

        dst[56] = (t5 - t1 + 1) >> 7;

        src++;

        dst++;

    }

}

/** Do inverse transform on 8x4 part of block

*/

static void vc1_inv_trans_8x4_dc_c(uint8_t *dest, int linesize, DCTELEM *block)

{

    int i;

    int dc = block[0];

    const uint8_t *cm;

    dc = ( 3 * dc +  1) >> 1;

    dc = (17 * dc + 64) >> 7;

    cm = ff_cropTbl + MAX_NEG_CROP + dc;

    for(i = 0; i < 4; i++){

        dest[0] = cm[dest[0]];

        dest[1] = cm[dest[1]];

        dest[2] = cm[dest[2]];

        dest[3] = cm[dest[3]];

        dest[4] = cm[dest[4]];

        dest[5] = cm[dest[5]];

        dest[6] = cm[dest[6]];

        dest[7] = cm[dest[7]];

        dest += linesize;

    }

}

static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, DCTELEM *block)

{

    int i;

    register int t1,t2,t3,t4,t5,t6,t7,t8;

    DCTELEM *src, *dst;

    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;

    src = block;

    dst = block;

    for(i = 0; i < 4; i++){

        t1 = 12 * (src[0] + src[4]) + 4;

        t2 = 12 * (src[0] - src[4]) + 4;

        t3 = 16 * src[2] +  6 * src[6];

        t4 =  6 * src[2] - 16 * src[6];

        t5 = t1 + t3;

        t6 = t2 + t4;

        t7 = t2 - t4;

        t8 = t1 - t3;

        t1 = 16 * src[1] + 15 * src[3] +  9 * src[5] +  4 * src[7];

        t2 = 15 * src[1] -  4 * src[3] - 16 * src[5] -  9 * src[7];

        t3 =  9 * src[1] - 16 * src[3] +  4 * src[5] + 15 * src[7];

        t4 =  4 * src[1] -  9 * src[3] + 15 * src[5] - 16 * src[7];

        dst[0] = (t5 + t1) >> 3;

        dst[1] = (t6 + t2) >> 3;

        dst[2] = (t7 + t3) >> 3;

        dst[3] = (t8 + t4) >> 3;

        dst[4] = (t8 - t4) >> 3;

        dst[5] = (t7 - t3) >> 3;

        dst[6] = (t6 - t2) >> 3;

        dst[7] = (t5 - t1) >> 3;

        src += 8;

        dst += 8;

    }

    src = block;

    for(i = 0; i < 8; i++){

        t1 = 17 * (src[ 0] + src[16]) + 64;

        t2 = 17 * (src[ 0] - src[16]) + 64;

        t3 = 22 * src[ 8] + 10 * src[24];

        t4 = 22 * src[24] - 10 * src[ 8];

        dest[0*linesize] = cm[dest[0*linesize] + ((t1 + t3) >> 7)];

        dest[1*linesize] = cm[dest[1*linesize] + ((t2 - t4) >> 7)];

        dest[2*linesize] = cm[dest[2*linesize] + ((t2 + t4) >> 7)];

        dest[3*linesize] = cm[dest[3*linesize] + ((t1 - t3) >> 7)];

        src ++;

        dest++;

    }

}

/** Do inverse transform on 4x8 parts of block

*/

static void vc1_inv_trans_4x8_dc_c(uint8_t *dest, int linesize, DCTELEM *block)

{

    int i;

    int dc = block[0];

    const uint8_t *cm;

    dc = (17 * dc +  4) >> 3;

    dc = (12 * dc + 64) >> 7;

    cm = ff_cropTbl + MAX_NEG_CROP + dc;

    for(i = 0; i < 8; i++){

        dest[0] = cm[dest[0]];

        dest[1] = cm[dest[1]];

        dest[2] = cm[dest[2]];

        dest[3] = cm[dest[3]];

        dest += linesize;

    }

}

static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, DCTELEM *block)

{

    int i;

    register int t1,t2,t3,t4,t5,t6,t7,t8;

    DCTELEM *src, *dst;

    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;

    src = block;

    dst = block;

    for(i = 0; i < 8; i++){

        t1 = 17 * (src[0] + src[2]) + 4;

        t2 = 17 * (src[0] - src[2]) + 4;

        t3 = 22 * src[1] + 10 * src[3];

        t4 = 22 * src[3] - 10 * src[1];

        dst[0] = (t1 + t3) >> 3;

        dst[1] = (t2 - t4) >> 3;

        dst[2] = (t2 + t4) >> 3;

        dst[3] = (t1 - t3) >> 3;

        src += 8;

        dst += 8;

    }

    src = block;

    for(i = 0; i < 4; i++){

        t1 = 12 * (src[ 0] + src[32]) + 64;

        t2 = 12 * (src[ 0] - src[32]) + 64;

        t3 = 16 * src[16] +  6 * src[48];

        t4 =  6 * src[16] - 16 * src[48];

        t5 = t1 + t3;

        t6 = t2 + t4;

        t7 = t2 - t4;

        t8 = t1 - t3;

        t1 = 16 * src[ 8] + 15 * src[24] +  9 * src[40] +  4 * src[56];

        t2 = 15 * src[ 8] -  4 * src[24] - 16 * src[40] -  9 * src[56];

        t3 =  9 * src[ 8] - 16 * src[24] +  4 * src[40] + 15 * src[56];

        t4 =  4 * src[ 8] -  9 * src[24] + 15 * src[40] - 16 * src[56];

        dest[0*linesize] = cm[dest[0*linesize] + ((t5 + t1) >> 7)];

        dest[1*linesize] = cm[dest[1*linesize] + ((t6 + t2) >> 7)];

        dest[2*linesize] = cm[dest[2*linesize] + ((t7 + t3) >> 7)];

        dest[3*linesize] = cm[dest[3*linesize] + ((t8 + t4) >> 7)];

        dest[4*linesize] = cm[dest[4*linesize] + ((t8 - t4 + 1) >> 7)];

        dest[5*linesize] = cm[dest[5*linesize] + ((t7 - t3 + 1) >> 7)];

        dest[6*linesize] = cm[dest[6*linesize] + ((t6 - t2 + 1) >> 7)];

        dest[7*linesize] = cm[dest[7*linesize] + ((t5 - t1 + 1) >> 7)];

        src ++;

        dest++;

    }

}

/** Do inverse transform on 4x4 part of block

*/

static void vc1_inv_trans_4x4_dc_c(uint8_t *dest, int linesize, DCTELEM *block)

{

    int i;

    int dc = block[0];

    const uint8_t *cm;

    dc = (17 * dc +  4) >> 3;

    dc = (17 * dc + 64) >> 7;

    cm = ff_cropTbl + MAX_NEG_CROP + dc;

    for(i = 0; i < 4; i++){

        dest[0] = cm[dest[0]];

        dest[1] = cm[dest[1]];

        dest[2] = cm[dest[2]];

        dest[3] = cm[dest[3]];

        dest += linesize;

    }

}

static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, DCTELEM *block)

{

    int i;

    register int t1,t2,t3,t4;

    DCTELEM *src, *dst;

    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;

    src = block;

    dst = block;

    for(i = 0; i < 4; i++){

        t1 = 17 * (src[0] + src[2]) + 4;

        t2 = 17 * (src[0] - src[2]) + 4;

        t3 = 22 * src[1] + 10 * src[3];

        t4 = 22 * src[3] - 10 * src[1];

        dst[0] = (t1 + t3) >> 3;

        dst[1] = (t2 - t4) >> 3;

        dst[2] = (t2 + t4) >> 3;

        dst[3] = (t1 - t3) >> 3;

        src += 8;

        dst += 8;

    }

    src = block;

    for(i = 0; i < 4; i++){

        t1 = 17 * (src[ 0] + src[16]) + 64;

        t2 = 17 * (src[ 0] - src[16]) + 64;

        t3 = 22 * src[ 8] + 10 * src[24];

        t4 = 22 * src[24] - 10 * src[ 8];

        dest[0*linesize] = cm[dest[0*linesize] + ((t1 + t3) >> 7)];

        dest[1*linesize] = cm[dest[1*linesize] + ((t2 - t4) >> 7)];

        dest[2*linesize] = cm[dest[2*linesize] + ((t2 + t4) >> 7)];

        dest[3*linesize] = cm[dest[3*linesize] + ((t1 - t3) >> 7)];

        src ++;

        dest++;

    }

}

/* motion compensation functions */

/** Filter in case of 2 filters */

#define VC1_MSPEL_FILTER_16B(DIR, TYPE)                                 \

static av_always_inline int vc1_mspel_ ## DIR ## _filter_16bits(const TYPE *src, int stride, int mode) \

{                                                                       \

    switch(mode){                                                       \

    case 0: /* no shift - should not occur */                           \

        return 0;                                                       \

    case 1: /* 1/4 shift */                                             \

        return -4*src[-stride] + 53*src[0] + 18*src[stride] - 3*src[stride*2]; \

    case 2: /* 1/2 shift */                                             \

        return -src[-stride] + 9*src[0] + 9*src[stride] - src[stride*2]; \

    case 3: /* 3/4 shift */                                             \

        return -3*src[-stride] + 18*src[0] + 53*src[stride] - 4*src[stride*2]; \

    }                                                                   \

    return 0; /* should not occur */                                    \

}

VC1_MSPEL_FILTER_16B(ver, uint8_t);

VC1_MSPEL_FILTER_16B(hor, int16_t);

/** Filter used to interpolate fractional pel values

 */

static av_always_inline int vc1_mspel_filter(const uint8_t *src, int stride, int mode, int r)

{

    switch(mode){

    case 0: //no shift

        return src[0];

    case 1: // 1/4 shift

        return (-4*src[-stride] + 53*src[0] + 18*src[stride] - 3*src[stride*2] + 32 - r) >> 6;

    case 2: // 1/2 shift

        return (-src[-stride] + 9*src[0] + 9*src[stride] - src[stride*2] + 8 - r) >> 4;

    case 3: // 3/4 shift

        return (-3*src[-stride] + 18*src[0] + 53*src[stride] - 4*src[stride*2] + 32 - r) >> 6;

    }

    return 0; //should not occur

}

/** Function used to do motion compensation with bicubic interpolation

 */

#define VC1_MSPEL_MC(OP, OPNAME)\

static void OPNAME ## vc1_mspel_mc(uint8_t *dst, const uint8_t *src, int stride, int hmode, int vmode, int rnd)\

{\

    int     i, j;\

\

    if (vmode) { /* Horizontal filter to apply */\

        int r;\

\

        if (hmode) { /* Vertical filter to apply, output to tmp */\

            static const int shift_value[] = { 0, 5, 1, 5 };\

            int              shift = (shift_value[hmode]+shift_value[vmode])>>1;\

            int16_t          tmp[11*8], *tptr = tmp;\

\

            r = (1<<(shift-1)) + rnd-1;\

\

            src -= 1;\

            for(j = 0; j < 8; j++) {\

                for(i = 0; i < 11; i++)\

                    tptr[i] = (vc1_mspel_ver_filter_16bits(src + i, stride, vmode)+r)>>shift;\

                src += stride;\

                tptr += 11;\

            }\

\

            r = 64-rnd;\

            tptr = tmp+1;\

            for(j = 0; j < 8; j++) {\

                for(i = 0; i < 8; i++)\

                    OP(dst[i], (vc1_mspel_hor_filter_16bits(tptr + i, 1, hmode)+r)>>7);\

                dst += stride;\

                tptr += 11;\

            }\

\

            return;\

        }\

        else { /* No horizontal filter, output 8 lines to dst */\

            r = 1-rnd;\

\

            for(j = 0; j < 8; j++) {\

                for(i = 0; i < 8; i++)\

                    OP(dst[i], vc1_mspel_filter(src + i, stride, vmode, r));\

                src += stride;\

                dst += stride;\

            }\

            return;\

        }\

    }\

\

    /* Horizontal mode with no vertical mode */\

    for(j = 0; j < 8; j++) {\

        for(i = 0; i < 8; i++)\

            OP(dst[i], vc1_mspel_filter(src + i, 1, hmode, rnd));\

        dst += stride;\

        src += stride;\

    }\

}

#define op_put(a, b) a = av_clip_uint8(b)

#define op_avg(a, b) a = (a + av_clip_uint8(b) + 1) >> 1

VC1_MSPEL_MC(op_put, put_)

VC1_MSPEL_MC(op_avg, avg_)

/* pixel functions - really are entry points to vc1_mspel_mc */

#define PUT_VC1_MSPEL(a, b)\

static void put_vc1_mspel_mc ## a ## b ##_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) { \

     put_vc1_mspel_mc(dst, src, stride, a, b, rnd);                         \

}\

static void avg_vc1_mspel_mc ## a ## b ##_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) { \

     avg_vc1_mspel_mc(dst, src, stride, a, b, rnd);                         \

}

PUT_VC1_MSPEL(1, 0)

PUT_VC1_MSPEL(2, 0)

PUT_VC1_MSPEL(3, 0)

PUT_VC1_MSPEL(0, 1)

PUT_VC1_MSPEL(1, 1)

PUT_VC1_MSPEL(2, 1)

PUT_VC1_MSPEL(3, 1)

PUT_VC1_MSPEL(0, 2)

PUT_VC1_MSPEL(1, 2)

PUT_VC1_MSPEL(2, 2)

PUT_VC1_MSPEL(3, 2)

PUT_VC1_MSPEL(0, 3)

PUT_VC1_MSPEL(1, 3)

PUT_VC1_MSPEL(2, 3)

PUT_VC1_MSPEL(3, 3)

static void put_no_rnd_vc1_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;

    assert(x<8 && y<8 && x>=0 && y>=0);

    for(i=0; i<h; i++)

    {

        dst[0] = (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + 32 - 4) >> 6;

        dst[1] = (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + 32 - 4) >> 6;

        dst[2] = (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + 32 - 4) >> 6;

        dst[3] = (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + 32 - 4) >> 6;

        dst[4] = (A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + 32 - 4) >> 6;

        dst[5] = (A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + 32 - 4) >> 6;

        dst[6] = (A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + 32 - 4) >> 6;

        dst[7] = (A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + 32 - 4) >> 6;

        dst+= stride;

        src+= stride;

    }

}

#define avg2(a,b) ((a+b+1)>>1)

static void avg_no_rnd_vc1_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;

    assert(x<8 && y<8 && x>=0 && y>=0);

    for(i=0; i<h; i++)

    {

        dst[0] = avg2(dst[0], ((A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + 32 - 4) >> 6));

        dst[1] = avg2(dst[1], ((A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + 32 - 4) >> 6));

        dst[2] = avg2(dst[2], ((A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + 32 - 4) >> 6));

        dst[3] = avg2(dst[3], ((A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + 32 - 4) >> 6));

        dst[4] = avg2(dst[4], ((A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + 32 - 4) >> 6));

        dst[5] = avg2(dst[5], ((A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + 32 - 4) >> 6));

        dst[6] = avg2(dst[6], ((A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + 32 - 4) >> 6));

        dst[7] = avg2(dst[7], ((A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + 32 - 4) >> 6));

        dst+= stride;

        src+= stride;

    }

}

av_cold void ff_vc1dsp_init(VC1DSPContext* dsp) {

    dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_c;

    dsp->vc1_inv_trans_4x8 = vc1_inv_trans_4x8_c;

    dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_c;

    dsp->vc1_inv_trans_4x4 = vc1_inv_trans_4x4_c;

    dsp->vc1_inv_trans_8x8_dc = vc1_inv_trans_8x8_dc_c;

    dsp->vc1_inv_trans_4x8_dc = vc1_inv_trans_4x8_dc_c;

    dsp->vc1_inv_trans_8x4_dc = vc1_inv_trans_8x4_dc_c;

    dsp->vc1_inv_trans_4x4_dc = vc1_inv_trans_4x4_dc_c;

    dsp->vc1_h_overlap = vc1_h_overlap_c;

    dsp->vc1_v_overlap = vc1_v_overlap_c;

    dsp->vc1_v_loop_filter4 = vc1_v_loop_filter4_c;

    dsp->vc1_h_loop_filter4 = vc1_h_loop_filter4_c;

    dsp->vc1_v_loop_filter8 = vc1_v_loop_filter8_c;

    dsp->vc1_h_loop_filter8 = vc1_h_loop_filter8_c;

    dsp->vc1_v_loop_filter16 = vc1_v_loop_filter16_c;

    dsp->vc1_h_loop_filter16 = vc1_h_loop_filter16_c;

    dsp->put_vc1_mspel_pixels_tab[ 0] = ff_put_pixels8x8_c;

    dsp->put_vc1_mspel_pixels_tab[ 1] = put_vc1_mspel_mc10_c;

    dsp->put_vc1_mspel_pixels_tab[ 2] = put_vc1_mspel_mc20_c;

    dsp->put_vc1_mspel_pixels_tab[ 3] = put_vc1_mspel_mc30_c;

    dsp->put_vc1_mspel_pixels_tab[ 4] = put_vc1_mspel_mc01_c;

    dsp->put_vc1_mspel_pixels_tab[ 5] = put_vc1_mspel_mc11_c;

    dsp->put_vc1_mspel_pixels_tab[ 6] = put_vc1_mspel_mc21_c;

    dsp->put_vc1_mspel_pixels_tab[ 7] = put_vc1_mspel_mc31_c;

    dsp->put_vc1_mspel_pixels_tab[ 8] = put_vc1_mspel_mc02_c;

    dsp->put_vc1_mspel_pixels_tab[ 9] = put_vc1_mspel_mc12_c;

    dsp->put_vc1_mspel_pixels_tab[10] = put_vc1_mspel_mc22_c;

    dsp->put_vc1_mspel_pixels_tab[11] = put_vc1_mspel_mc32_c;

    dsp->put_vc1_mspel_pixels_tab[12] = put_vc1_mspel_mc03_c;

    dsp->put_vc1_mspel_pixels_tab[13] = put_vc1_mspel_mc13_c;

    dsp->put_vc1_mspel_pixels_tab[14] = put_vc1_mspel_mc23_c;

    dsp->put_vc1_mspel_pixels_tab[15] = put_vc1_mspel_mc33_c;

    dsp->avg_vc1_mspel_pixels_tab[ 0] = ff_avg_pixels8x8_c;

    dsp->avg_vc1_mspel_pixels_tab[ 1] = avg_vc1_mspel_mc10_c;

    dsp->avg_vc1_mspel_pixels_tab[ 2] = avg_vc1_mspel_mc20_c;

    dsp->avg_vc1_mspel_pixels_tab[ 3] = avg_vc1_mspel_mc30_c;

    dsp->avg_vc1_mspel_pixels_tab[ 4] = avg_vc1_mspel_mc01_c;

    dsp->avg_vc1_mspel_pixels_tab[ 5] = avg_vc1_mspel_mc11_c;

    dsp->avg_vc1_mspel_pixels_tab[ 6] = avg_vc1_mspel_mc21_c;

    dsp->avg_vc1_mspel_pixels_tab[ 7] = avg_vc1_mspel_mc31_c;

    dsp->avg_vc1_mspel_pixels_tab[ 8] = avg_vc1_mspel_mc02_c;

    dsp->avg_vc1_mspel_pixels_tab[ 9] = avg_vc1_mspel_mc12_c;

    dsp->avg_vc1_mspel_pixels_tab[10] = avg_vc1_mspel_mc22_c;

    dsp->avg_vc1_mspel_pixels_tab[11] = avg_vc1_mspel_mc32_c;

    dsp->avg_vc1_mspel_pixels_tab[12] = avg_vc1_mspel_mc03_c;

    dsp->avg_vc1_mspel_pixels_tab[13] = avg_vc1_mspel_mc13_c;

    dsp->avg_vc1_mspel_pixels_tab[14] = avg_vc1_mspel_mc23_c;

    dsp->avg_vc1_mspel_pixels_tab[15] = avg_vc1_mspel_mc33_c;

    dsp->put_no_rnd_vc1_chroma_pixels_tab[0]= put_no_rnd_vc1_chroma_mc8_c;

    dsp->avg_no_rnd_vc1_chroma_pixels_tab[0]= avg_no_rnd_vc1_chroma_mc8_c;

    if (HAVE_ALTIVEC)

        ff_vc1dsp_init_altivec(dsp);

    if (HAVE_MMX)

        ff_vc1dsp_init_mmx(dsp);

}