libavcodec/vc1dsp.c - vendor/opensource/ffmpeg - Git at Google

 /*
  * 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 libavcodec/vc1dsp.c
  * VC-1 and WMV3 decoder
  *
  */

 #include "dsputil.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;
     }
 }


 /** Do inverse transform on 8x8 block
 */
 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;

     src = block;
     dst = block;
     for(i = 0; i < 8; 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;
     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_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_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_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
  */
 static void 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++)
                     dst[i] = av_clip_uint8((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++)
                     dst[i] = av_clip_uint8(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++)
             dst[i] = av_clip_uint8(vc1_mspel_filter(src + i, 1, hmode, rnd));
         dst += stride;
         src += stride;
     }
 }

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

 /* this one is defined in dsputil.c */
 void ff_put_vc1_mspel_mc00_c(uint8_t *dst, const uint8_t *src, int stride, int rnd);

 #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) { \
      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)

 void ff_vc1dsp_init(DSPContext* dsp, AVCodecContext *avctx) {
     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_h_overlap = vc1_h_overlap_c;
     dsp->vc1_v_overlap = vc1_v_overlap_c;

     dsp->put_vc1_mspel_pixels_tab[ 0] = ff_put_vc1_mspel_mc00_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;
 }
	/*
	* 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 libavcodec/vc1dsp.c
	* VC-1 and WMV3 decoder
	*
	*/

	#include "dsputil.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;
	}
	}


	/** Do inverse transform on 8x8 block
	*/
	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;

	src = block;
	dst = block;
	for(i = 0; i < 8; 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;
	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_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[0linesize] = cm[dest[0linesize] + ((t1 + t3) >> 7)];
	dest[1linesize] = cm[dest[1linesize] + ((t2 - t4) >> 7)];
	dest[2linesize] = cm[dest[2linesize] + ((t2 + t4) >> 7)];
	dest[3linesize] = cm[dest[3linesize] + ((t1 - t3) >> 7)];

	src ++;
	dest++;
	}
	}

	/** Do inverse transform on 4x8 parts of block
	*/
	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[0linesize] = cm[dest[0linesize] + ((t5 + t1) >> 7)];
	dest[1linesize] = cm[dest[1linesize] + ((t6 + t2) >> 7)];
	dest[2linesize] = cm[dest[2linesize] + ((t7 + t3) >> 7)];
	dest[3linesize] = cm[dest[3linesize] + ((t8 + t4) >> 7)];
	dest[4linesize] = cm[dest[4linesize] + ((t8 - t4 + 1) >> 7)];
	dest[5linesize] = cm[dest[5linesize] + ((t7 - t3 + 1) >> 7)];
	dest[6linesize] = cm[dest[6linesize] + ((t6 - t2 + 1) >> 7)];
	dest[7linesize] = cm[dest[7linesize] + ((t5 - t1 + 1) >> 7)];

	src ++;
	dest++;
	}
	}

	/** Do inverse transform on 4x4 part of block
	*/
	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[0linesize] = cm[dest[0linesize] + ((t1 + t3) >> 7)];
	dest[1linesize] = cm[dest[1linesize] + ((t2 - t4) >> 7)];
	dest[2linesize] = cm[dest[2linesize] + ((t2 + t4) >> 7)];
	dest[3linesize] = cm[dest[3linesize] + ((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 -4src[-stride] + 53src[0] + 18src[stride] - 3src[stride*2]; \
	case 2: /* 1/2 shift */ \
	return -src[-stride] + 9src[0] + 9src[stride] - src[stride*2]; \
	case 3: /* 3/4 shift */ \
	return -3src[-stride] + 18src[0] + 53src[stride] - 4src[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 (-4src[-stride] + 53src[0] + 18src[stride] - 3src[stride*2] + 32 - r) >> 6;
	case 2: // 1/2 shift
	return (-src[-stride] + 9src[0] + 9src[stride] - src[stride*2] + 8 - r) >> 4;
	case 3: // 3/4 shift
	return (-3src[-stride] + 18src[0] + 53src[stride] - 4src[stride*2] + 32 - r) >> 6;
	}
	return 0; //should not occur
	}

	/** Function used to do motion compensation with bicubic interpolation
	*/
	static void 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[118], 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++)
	dst[i] = av_clip_uint8((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++)
	dst[i] = av_clip_uint8(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++)
	dst[i] = av_clip_uint8(vc1_mspel_filter(src + i, 1, hmode, rnd));
	dst += stride;
	src += stride;
	}
	}

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

	/* this one is defined in dsputil.c */
	void ff_put_vc1_mspel_mc00_c(uint8_t dst, const uint8_t src, int stride, int rnd);

	#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) { \
	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)

	void ff_vc1dsp_init(DSPContext* dsp, AVCodecContext *avctx) {
	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_h_overlap = vc1_h_overlap_c;
	dsp->vc1_v_overlap = vc1_v_overlap_c;

	dsp->put_vc1_mspel_pixels_tab[ 0] = ff_put_vc1_mspel_mc00_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;
	}