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revision 1.4.2.4, Sun Nov 3 02:04:07 2002 UTC revision 1.9, Tue Feb 11 21:56:31 2003 UTC
# Line 1  Line 1 
1  /**************************************************************************  /*****************************************************************************
2   *   *
3   *      XVID MPEG-4 VIDEO CODEC   *      XVID MPEG-4 VIDEO CODEC
4   *      8x8 block-based halfpel interpolation   *  - 8x8 block-based halfpel interpolation -
5   *   *
6   *      This program is free software; you can redistribute it and/or modify   *  Copyright(C) 2002 Peter Ross <pross@xvid.org>
7   *      it under the terms of the GNU General Public License as published by   *  Copyright(C) 2002 MinChen <chenm002@163.com>
8     *
9     *  This file is part of XviD, a free MPEG-4 video encoder/decoder
10     *
11     *  XviD is free software; you can redistribute it and/or modify it
12     *  under the terms of the GNU General Public License as published by
13   *      the Free Software Foundation; either version 2 of the License, or   *      the Free Software Foundation; either version 2 of the License, or
14   *      (at your option) any later version.   *      (at your option) any later version.
15   *   *
# Line 15  Line 20 
20   *   *
21   *      You should have received a copy of the GNU General Public License   *      You should have received a copy of the GNU General Public License
22   *      along with this program; if not, write to the Free Software   *      along with this program; if not, write to the Free Software
23   *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  *  
  *************************************************************************/  
   
 /**************************************************************************  
24   *   *
25   *      History:   *  Under section 8 of the GNU General Public License, the copyright
26     *  holders of XVID explicitly forbid distribution in the following
27     *  countries:
28     *
29     *    - Japan
30     *    - United States of America
31     *
32     *  Linking XviD statically or dynamically with other modules is making a
33     *  combined work based on XviD.  Thus, the terms and conditions of the
34     *  GNU General Public License cover the whole combination.
35     *
36     *  As a special exception, the copyright holders of XviD give you
37     *  permission to link XviD with independent modules that communicate with
38     *  XviD solely through the VFW1.1 and DShow interfaces, regardless of the
39     *  license terms of these independent modules, and to copy and distribute
40     *  the resulting combined work under terms of your choice, provided that
41     *  every copy of the combined work is accompanied by a complete copy of
42     *  the source code of XviD (the version of XviD used to produce the
43     *  combined work), being distributed under the terms of the GNU General
44     *  Public License plus this exception.  An independent module is a module
45     *  which is not derived from or based on XviD.
46     *
47     *  Note that people who make modified versions of XviD are not obligated
48     *  to grant this special exception for their modified versions; it is
49     *  their choice whether to do so.  The GNU General Public License gives
50     *  permission to release a modified version without this exception; this
51     *  exception also makes it possible to release a modified version which
52     *  carries forward this exception.
53   *   *
54   *  05.10.2002  new bilinear and qpel interpolation code - Isibaar   * $Id$
  *      27.12.2001      modified "compensate_halfpel"  
  *      05.11.2001      initial version; (c)2001 peter ross <pross@cs.rmit.edu.au>  
55   *   *
56   *************************************************************************/   ****************************************************************************/
   
57    
58  #include "../portab.h"  #include "../portab.h"
59  #include "interpolate8x8.h"  #include "interpolate8x8.h"
60    
61  // function pointers  /* function pointers */
62  INTERPOLATE8X8_PTR interpolate8x8_halfpel_h;  INTERPOLATE8X8_PTR interpolate8x8_halfpel_h;
63  INTERPOLATE8X8_PTR interpolate8x8_halfpel_v;  INTERPOLATE8X8_PTR interpolate8x8_halfpel_v;
64  INTERPOLATE8X8_PTR interpolate8x8_halfpel_hv;  INTERPOLATE8X8_PTR interpolate8x8_halfpel_hv;
65    
 INTERPOLATE8X8_AVG2_PTR interpolate8x8_avg2;  
 INTERPOLATE8X8_AVG4_PTR interpolate8x8_avg4;  
   
 INTERPOLATE_LOWPASS_PTR interpolate8x8_lowpass_h;  
 INTERPOLATE_LOWPASS_PTR interpolate8x8_lowpass_v;  
66    
67  INTERPOLATE_LOWPASS_PTR interpolate16x16_lowpass_h;  /* dst = interpolate(src) */
 INTERPOLATE_LOWPASS_PTR interpolate16x16_lowpass_v;  
   
 INTERPOLATE_LOWPASS_HV_PTR interpolate8x8_lowpass_hv;  
 INTERPOLATE_LOWPASS_HV_PTR interpolate16x16_lowpass_hv;  
   
 INTERPOLATE8X8_6TAP_LOWPASS_PTR interpolate8x8_6tap_lowpass_h;  
 INTERPOLATE8X8_6TAP_LOWPASS_PTR interpolate8x8_6tap_lowpass_v;  
   
 void interpolate8x8_avg2_c(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, const uint32_t stride, const uint32_t rounding)  
 {  
     int32_t i;  
         const int32_t round = 1 - rounding;  
   
     for(i = 0; i < 9; i++)  
     {  
         dst[0] = (src1[0] + src2[0] + round) >> 1;  
         dst[1] = (src1[1] + src2[1] + round) >> 1;  
         dst[2] = (src1[2] + src2[2] + round) >> 1;  
         dst[3] = (src1[3] + src2[3] + round) >> 1;  
         dst[4] = (src1[4] + src2[4] + round) >> 1;  
         dst[5] = (src1[5] + src2[5] + round) >> 1;  
         dst[6] = (src1[6] + src2[6] + round) >> 1;  
         dst[7] = (src1[7] + src2[7] + round) >> 1;  
   
         dst += stride;  
         src1 += stride;  
         src2 += stride;  
     }  
 }  
   
 void interpolate8x8_avg4_c(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, const uint8_t *src3, const uint8_t *src4, const uint32_t stride, const uint32_t rounding)  
 {  
     int32_t i;  
         const int32_t round = 2 - rounding;  
   
     for(i = 0; i < 8; i++)  
     {  
         dst[0] = (src1[0] + src2[0] + src3[0] + src4[0] + round) >> 2;  
         dst[1] = (src1[1] + src2[1] + src3[1] + src4[1] + round) >> 2;  
         dst[2] = (src1[2] + src2[2] + src3[2] + src4[2] + round) >> 2;  
         dst[3] = (src1[3] + src2[3] + src3[3] + src4[3] + round) >> 2;  
         dst[4] = (src1[4] + src2[4] + src3[4] + src4[4] + round) >> 2;  
         dst[5] = (src1[5] + src2[5] + src3[5] + src4[5] + round) >> 2;  
         dst[6] = (src1[6] + src2[6] + src3[6] + src4[6] + round) >> 2;  
         dst[7] = (src1[7] + src2[7] + src3[7] + src4[7] + round) >> 2;  
   
                 dst += stride;  
         src1 += stride;  
         src2 += stride;  
         src3 += stride;  
         src4 += stride;  
     }  
 }  
   
 // dst = interpolate(src)  
68    
69  void  void
70  interpolate8x8_halfpel_h_c(uint8_t * const dst,  interpolate8x8_halfpel_h_c(uint8_t * const dst,
# Line 112  Line 77 
77          for (j = 0; j < 8; j++) {          for (j = 0; j < 8; j++) {
78                  for (i = 0; i < 8; i++) {                  for (i = 0; i < 8; i++) {
79    
80                          int16_t tot =                          int32_t tot =
81                                  (int32_t) src[j * stride + i] + (int32_t) src[j * stride + i +                                  (int32_t) src[j * stride + i] + (int32_t) src[j * stride + i + 1];
                                                                                                                           1];  
82    
83                          tot = (int32_t) ((tot + 1 - rounding) >> 1);                          tot = (tot + 1 - rounding) >> 1;
84                          dst[j * stride + i] = (uint8_t) tot;                          dst[j * stride + i] = (uint8_t) tot;
85                  }                  }
86          }          }
# Line 134  Line 98 
98    
99          for (j = 0; j < 8; j++) {          for (j = 0; j < 8; j++) {
100                  for (i = 0; i < 8; i++) {                  for (i = 0; i < 8; i++) {
101                          int16_t tot = src[j * stride + i] + src[j * stride + i + stride];                          int32_t tot =
102                                    (int32_t)src[j * stride + i] + (int32_t)src[j * stride + i + stride];
103    
104                          tot = ((tot + 1 - rounding) >> 1);                          tot = ((tot + 1 - rounding) >> 1);
105                          dst[j * stride + i] = (uint8_t) tot;                          dst[j * stride + i] = (uint8_t) tot;
# Line 153  Line 118 
118    
119          for (j = 0; j < 8; j++) {          for (j = 0; j < 8; j++) {
120                  for (i = 0; i < 8; i++) {                  for (i = 0; i < 8; i++) {
121                          int16_t tot =                          int32_t tot =
122                                  src[j * stride + i] + src[j * stride + i + 1] +                                  (int32_t)src[j * stride + i] + (int32_t)src[j * stride + i + 1] +
123                                  src[j * stride + i + stride] + src[j * stride + i + stride +                                  (int32_t)src[j * stride + i + stride] + (int32_t)src[j * stride + i + stride + 1];
                                                                                                    1];  
124                          tot = ((tot + 2 - rounding) >> 2);                          tot = ((tot + 2 - rounding) >> 2);
125                          dst[j * stride + i] = (uint8_t) tot;                          dst[j * stride + i] = (uint8_t) tot;
126                  }                  }
127          }          }
128  }  }
129    
130  /*************************************************************  /* add by MinChen <chenm001@163.com> */
131   * QPEL STUFF STARTS HERE                                    *  /* interpolate8x8 two pred block */
132   *************************************************************/  void
133    interpolate8x8_c(uint8_t * const dst,
134  #define CLIP(X,A,B) (X < A) ? (A) : ((X > B) ? (B) : (X))                                   const uint8_t * const src,
135                                     const uint32_t x,
136  void interpolate8x8_6tap_lowpass_h_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)                                   const uint32_t y,
137  {                                   const uint32_t stride)
     int32_t i;  
         uint8_t round_add = 16 - rounding;  
   
     for(i = 0; i < 8; i++)  
     {  
   
         dst[0] = CLIP((((src[-2] + src[3]) + 5 * (((src[0] + src[1])<<2) - (src[-1] + src[2])) + round_add) >> 5), 0, 255);  
         dst[1] = CLIP((((src[-1] + src[4]) + 5 * (((src[1] + src[2])<<2) - (src[0] + src[3])) + round_add) >> 5), 0, 255);  
         dst[2] = CLIP((((src[0] + src[5]) + 5 * (((src[2] + src[3])<<2) - (src[1] + src[4])) + round_add) >> 5), 0, 255);  
         dst[3] = CLIP((((src[1] + src[6]) + 5 * (((src[3] + src[4])<<2) - (src[2] + src[5])) + round_add) >> 5), 0, 255);  
         dst[4] = CLIP((((src[2] + src[7]) + 5 * (((src[4] + src[5])<<2) - (src[3] + src[6])) + round_add) >> 5), 0, 255);  
         dst[5] = CLIP((((src[3] + src[8]) + 5 * (((src[5] + src[6])<<2) - (src[4] + src[7])) + round_add) >> 5), 0, 255);  
         dst[6] = CLIP((((src[4] + src[9]) + 5 * (((src[6] + src[7])<<2) - (src[5] + src[8])) + round_add) >> 5), 0, 255);  
         dst[7] = CLIP((((src[5] + src[10]) + 5 * (((src[7] + src[8])<<2) - (src[6] + src[9])) + round_add) >> 5), 0, 255);  
   
         dst += stride;  
         src += stride;  
     }  
 }  
   
 void interpolate16x16_lowpass_h_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)  
 {  
     int32_t i;  
         uint8_t round_add = 16 - rounding;  
   
     for(i = 0; i < 17; i++)  
     {  
   
         dst[0] = CLIP(((7 * ((src[0]<<1) - src[2]) +  23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);  
         dst[1] = CLIP(((19 * src[1] + 20 * src[2] - src[5] + 3 * (src[4] - src[0] - (src[3]<<1)) + round_add) >> 5), 0, 255);  
         dst[2] = CLIP(((20 * (src[2] + src[3]) + (src[0]<<1) + 3 * (src[5] - ((src[1] + src[4])<<1)) - src[6] + round_add) >> 5), 0, 255);  
   
         dst[3] = CLIP(((20 * (src[3] + src[4]) + 3 * ((src[6] + src[1]) - ((src[2] + src[5])<<1)) - (src[0] + src[7]) + round_add) >> 5), 0, 255);  
         dst[4] = CLIP(((20 * (src[4] + src[5]) - 3 * (((src[3] + src[6])<<1) - (src[2] + src[7])) - (src[1] + src[8]) + round_add) >> 5), 0, 255);  
         dst[5] = CLIP(((20 * (src[5] + src[6]) - 3 * (((src[4] + src[7])<<1) - (src[3] + src[8])) - (src[2] + src[9]) + round_add) >> 5), 0, 255);  
         dst[6] = CLIP(((20 * (src[6] + src[7]) - 3 * (((src[5] + src[8])<<1) - (src[4] + src[9])) - (src[3] + src[10]) + round_add) >> 5), 0, 255);  
         dst[7] = CLIP(((20 * (src[7] + src[8]) - 3 * (((src[6] + src[9])<<1) - (src[5] + src[10])) - (src[4] + src[11]) + round_add) >> 5), 0, 255);  
         dst[8] = CLIP(((20 * (src[8] + src[9]) - 3 * (((src[7] + src[10])<<1) - (src[6] + src[11])) - (src[5] + src[12]) + round_add) >> 5), 0, 255);  
         dst[9] = CLIP(((20 * (src[9] + src[10]) - 3 * (((src[8] + src[11])<<1) - (src[7] + src[12])) - (src[6] + src[13]) + round_add) >> 5), 0, 255);  
         dst[10] = CLIP(((20 * (src[10] + src[11]) - 3 * (((src[9] + src[12])<<1) - (src[8] + src[13])) - (src[7] + src[14]) + round_add) >> 5), 0, 255);  
         dst[11] = CLIP(((20 * (src[11] + src[12]) - 3 * (((src[10] + src[13])<<1) - (src[9] + src[14])) - (src[8] + src[15]) + round_add) >> 5), 0, 255);  
         dst[12] = CLIP(((20 * (src[12] + src[13]) - 3 * (((src[11] + src[14])<<1) - (src[10] + src[15])) - (src[9] + src[16]) + round_add) >> 5), 0, 255);  
   
         dst[13] = CLIP(((20 * (src[13] + src[14]) + (src[16]<<1) + 3 * (src[11] - ((src[12] + src[15]) << 1)) - src[10] + round_add) >> 5), 0, 255);  
         dst[14] = CLIP(((19 * src[15] + 20 * src[14] + 3 * (src[12] - src[16] - (src[13] << 1)) - src[11] + round_add) >> 5), 0, 255);  
         dst[15] = CLIP(((23 * src[15] + 7 * ((src[16]<<1) - src[14]) + 3 * src[13] - src[12] + round_add) >> 5), 0, 255);  
   
         dst += stride;  
         src += stride;  
     }  
 }  
   
 void interpolate8x8_lowpass_h_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)  
 {  
     int32_t i;  
         uint8_t round_add = 16 - rounding;  
   
     for(i = 0; i < 9; i++)  
     {  
   
         dst[0] = CLIP(((7 * ((src[0]<<1) - src[2]) + 23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);  
         dst[1] = CLIP(((19 * src[1] + 20 * src[2] - src[5] + 3 * (src[4] - src[0] - (src[3]<<1)) + round_add) >> 5), 0, 255);  
         dst[2] = CLIP(((20 * (src[2] + src[3]) + (src[0]<<1) + 3 * (src[5] - ((src[1] + src[4])<<1)) - src[6] + round_add) >> 5), 0, 255);  
         dst[3] = CLIP(((20 * (src[3] + src[4]) + 3 * ((src[6] + src[1]) - ((src[2] + src[5])<<1)) - (src[0] + src[7]) + round_add) >> 5), 0, 255);  
         dst[4] = CLIP(((20 * (src[4] + src[5]) - 3 * (((src[3] + src[6])<<1) - (src[2] + src[7])) - (src[1] + src[8]) + round_add) >> 5), 0, 255);  
         dst[5] = CLIP(((20 * (src[5] + src[6]) + (src[8]<<1) + 3 * (src[3] - ((src[4] + src[7]) << 1)) - src[2] + round_add) >> 5), 0, 255);  
         dst[6] = CLIP(((19 * src[7] + 20 * src[6] + 3 * (src[4] - src[8] - (src[5] << 1)) - src[3] + round_add) >> 5), 0, 255);  
         dst[7] = CLIP(((23 * src[7] + 7 * ((src[8]<<1) - src[6]) + 3 * src[5] - src[4] + round_add) >> 5), 0, 255);  
   
         dst += stride;  
         src += stride;  
     }  
 }  
   
 void interpolate8x8_6tap_lowpass_v_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)  
 {  
     int32_t i;  
         uint8_t round_add = 16 - rounding;  
   
     for(i = 0; i < 8; i++)  
     {  
         int32_t src_2 = src[-2*stride];  
         int32_t src_1 = src[-stride];  
         int32_t src0 = src[0];  
         int32_t src1 = src[stride];  
         int32_t src2 = src[2 * stride];  
         int32_t src3 = src[3 * stride];  
         int32_t src4 = src[4 * stride];  
         int32_t src5 = src[5 * stride];  
         int32_t src6 = src[6 * stride];  
         int32_t src7 = src[7 * stride];  
         int32_t src8 = src[8 * stride];  
         int32_t src9 = src[9 * stride];  
         int32_t src10 = src[10 * stride];  
   
         dst[0]                  = CLIP((((src_2 + src3) + 5 * (((src0 + src1)<<2) - (src_1 + src2)) + round_add) >> 5), 0, 255);  
         dst[stride]             = CLIP((((src_1 + src4) + 5 * (((src1 + src2)<<2) - (src0 + src3)) + round_add) >> 5), 0, 255);  
         dst[2 * stride] = CLIP((((src0 + src5) + 5 * (((src2 + src3)<<2) - (src1 + src4)) + round_add) >> 5), 0, 255);  
         dst[3 * stride] = CLIP((((src1 + src6) + 5 * (((src3 + src4)<<2) - (src2 + src5)) + round_add) >> 5), 0, 255);  
         dst[4 * stride] = CLIP((((src2 + src7) + 5 * (((src4 + src5)<<2) - (src3 + src6)) + round_add) >> 5), 0, 255);  
         dst[5 * stride] = CLIP((((src3 + src8) + 5 * (((src5 + src6)<<2) - (src4 + src7)) + round_add) >> 5), 0, 255);  
         dst[6 * stride] = CLIP((((src4 + src9) + 5 * (((src6 + src7)<<2) - (src5 + src8)) + round_add) >> 5), 0, 255);  
         dst[7 * stride] = CLIP((((src5 + src10) + 5 * (((src7 + src8)<<2) - (src6 + src9)) + round_add) >> 5), 0, 255);  
   
                 dst++;  
         src++;  
     }  
 }  
   
 void interpolate16x16_lowpass_v_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)  
 {  
     int32_t i;  
         uint8_t round_add = 16 - rounding;  
   
     for(i = 0; i < 17; i++)  
     {  
         int32_t src0 = src[0];  
         int32_t src1 = src[stride];  
         int32_t src2 = src[2 * stride];  
         int32_t src3 = src[3 * stride];  
         int32_t src4 = src[4 * stride];  
         int32_t src5 = src[5 * stride];  
         int32_t src6 = src[6 * stride];  
         int32_t src7 = src[7 * stride];  
         int32_t src8 = src[8 * stride];  
         int32_t src9 = src[9 * stride];  
         int32_t src10 = src[10 * stride];  
         int32_t src11 = src[11 * stride];  
         int32_t src12 = src[12 * stride];  
         int32_t src13 = src[13 * stride];  
         int32_t src14 = src[14 * stride];  
         int32_t src15 = src[15 * stride];  
         int32_t src16 = src[16 * stride];  
   
   
         dst[0] = CLIP(((7 * ((src0<<1) - src2) +  23 * src1 + 3 * src3 - src4 + round_add) >> 5), 0, 255);  
         dst[stride] = CLIP(((19 * src1 + 20 * src2 - src5 + 3 * (src4 - src0 - (src3<<1)) + round_add) >> 5), 0, 255);  
         dst[2*stride] = CLIP(((20 * (src2 + src3) + (src0<<1) + 3 * (src5 - ((src1 + src4)<<1)) - src6 + round_add) >> 5), 0, 255);  
   
         dst[3*stride] = CLIP(((20 * (src3 + src4) + 3 * ((src6 + src1) - ((src2 + src5)<<1)) - (src0 + src7) + round_add) >> 5), 0, 255);  
         dst[4*stride] = CLIP(((20 * (src4 + src5) - 3 * (((src3 + src6)<<1) - (src2 + src7)) - (src1 + src8) + round_add) >> 5), 0, 255);  
         dst[5*stride] = CLIP(((20 * (src5 + src6) - 3 * (((src4 + src7)<<1) - (src3 + src8)) - (src2 + src9) + round_add) >> 5), 0, 255);  
         dst[6*stride] = CLIP(((20 * (src6 + src7) - 3 * (((src5 + src8)<<1) - (src4 + src9)) - (src3 + src10) + round_add) >> 5), 0, 255);  
         dst[7*stride] = CLIP(((20 * (src7 + src8) - 3 * (((src6 + src9)<<1) - (src5 + src10)) - (src4 + src11) + round_add) >> 5), 0, 255);  
         dst[8*stride] = CLIP(((20 * (src8 + src9) - 3 * (((src7 + src10)<<1) - (src6 + src11)) - (src5 + src12) + round_add) >> 5), 0, 255);  
         dst[9*stride] = CLIP(((20 * (src9 + src10) - 3 * (((src8 + src11)<<1) - (src7 + src12)) - (src6 + src13) + round_add) >> 5), 0, 255);  
         dst[10*stride] = CLIP(((20 * (src10 + src11) - 3 * (((src9 + src12)<<1) - (src8 + src13)) - (src7 + src14) + round_add) >> 5), 0, 255);  
         dst[11*stride] = CLIP(((20 * (src11 + src12) - 3 * (((src10 + src13)<<1) - (src9 + src14)) - (src8 + src15) + round_add) >> 5), 0, 255);  
         dst[12*stride] = CLIP(((20 * (src12 + src13) - 3 * (((src11 + src14)<<1) - (src10 + src15)) - (src9 + src16) + round_add) >> 5), 0, 255);  
   
         dst[13*stride] = CLIP(((20 * (src13 + src14) + (src16<<1) + 3 * (src11 - ((src12 + src15) << 1)) - src10 + round_add) >> 5), 0, 255);  
         dst[14*stride] = CLIP(((19 * src15 + 20 * src14 + 3 * (src12 - src16 - (src13 << 1)) - src11 + round_add) >> 5), 0, 255);  
         dst[15*stride] = CLIP(((23 * src15 + 7 * ((src16<<1) - src14) + 3 * src13 - src12 + round_add) >> 5), 0, 255);  
   
                 dst++;  
         src++;  
     }  
 }  
   
 void interpolate8x8_lowpass_v_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)  
 {  
     int32_t i;  
         uint8_t round_add = 16 - rounding;  
   
     for(i = 0; i < 9; i++)  
     {  
         int32_t src0 = src[0];  
         int32_t src1 = src[stride];  
         int32_t src2 = src[2 * stride];  
         int32_t src3 = src[3 * stride];  
         int32_t src4 = src[4 * stride];  
         int32_t src5 = src[5 * stride];  
         int32_t src6 = src[6 * stride];  
         int32_t src7 = src[7 * stride];  
         int32_t src8 = src[8 * stride];  
   
         dst[0]                  = CLIP(((7 * ((src0<<1) - src2) + 23 * src1 + 3 * src3 - src4 + round_add) >> 5), 0, 255);  
         dst[stride]             = CLIP(((19 * src1 + 20 * src2 - src5 + 3 * (src4 - src0 - (src3 << 1)) + round_add) >> 5), 0, 255);  
         dst[2 * stride] = CLIP(((20 * (src2 + src3) + (src0<<1) + 3 * (src5 - ((src1 + src4) <<1 )) - src6 + round_add) >> 5), 0, 255);  
         dst[3 * stride] = CLIP(((20 * (src3 + src4) + 3 * ((src6 + src1) - ((src2 + src5)<<1)) - (src0 + src7) + round_add) >> 5), 0, 255);  
         dst[4 * stride] = CLIP(((20 * (src4 + src5) + 3 * ((src2 + src7) - ((src3 + src6)<<1)) - (src1 + src8) + round_add) >> 5), 0, 255);  
         dst[5 * stride] = CLIP(((20 * (src5 + src6) + (src8<<1) + 3 * (src3 - ((src4 + src7) << 1)) - src2 + round_add) >> 5), 0, 255);  
         dst[6 * stride] = CLIP(((19 * src7 + 20 * src6 - src3 + 3 * (src4 - src8 - (src5 << 1)) + round_add) >> 5), 0, 255);  
         dst[7 * stride] = CLIP(((7 * ((src8<<1) - src6) + 23 * src7 + 3 * src5 - src4 + round_add) >> 5), 0, 255);  
   
                 dst++;  
         src++;  
     }  
 }  
   
 void interpolate16x16_lowpass_hv_c(uint8_t *dst1, uint8_t *dst2, uint8_t *src, int32_t stride, int32_t rounding)  
 {  
         int32_t i;  
         uint8_t round_add = 16 - rounding;  
         uint8_t *h_ptr = dst2;  
   
     for(i = 0; i < 17; i++)  
138      {      {
139            uint32_t i, j;
140    
141          h_ptr[0] = CLIP(((7 * ((src[0]<<1) - src[2]) +  23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);          for (j = 0; j < 8; j++) {
142          h_ptr[1] = CLIP(((19 * src[1] + 20 * src[2] - src[5] + 3 * (src[4] - src[0] - (src[3]<<1)) + round_add) >> 5), 0, 255);                  for (i = 0; i < 8; i++) {
143          h_ptr[2] = CLIP(((20 * (src[2] + src[3]) + (src[0]<<1) + 3 * (src[5] - ((src[1] + src[4])<<1)) - src[6] + round_add) >> 5), 0, 255);                          int32_t tot =
144                                    (((int32_t)src[(y + j) * stride + x + i] +
145          h_ptr[3] = CLIP(((20 * (src[3] + src[4]) + 3 * ((src[6] + src[1]) - ((src[2] + src[5])<<1)) - (src[0] + src[7]) + round_add) >> 5), 0, 255);                                    (int32_t)dst[(y + j) * stride + x + i] + 1) >> 1);
146          h_ptr[4] = CLIP(((20 * (src[4] + src[5]) - 3 * (((src[3] + src[6])<<1) - (src[2] + src[7])) - (src[1] + src[8]) + round_add) >> 5), 0, 255);                          dst[(y + j) * stride + x + i] = (uint8_t) tot;
         h_ptr[5] = CLIP(((20 * (src[5] + src[6]) - 3 * (((src[4] + src[7])<<1) - (src[3] + src[8])) - (src[2] + src[9]) + round_add) >> 5), 0, 255);  
         h_ptr[6] = CLIP(((20 * (src[6] + src[7]) - 3 * (((src[5] + src[8])<<1) - (src[4] + src[9])) - (src[3] + src[10]) + round_add) >> 5), 0, 255);  
         h_ptr[7] = CLIP(((20 * (src[7] + src[8]) - 3 * (((src[6] + src[9])<<1) - (src[5] + src[10])) - (src[4] + src[11]) + round_add) >> 5), 0, 255);  
         h_ptr[8] = CLIP(((20 * (src[8] + src[9]) - 3 * (((src[7] + src[10])<<1) - (src[6] + src[11])) - (src[5] + src[12]) + round_add) >> 5), 0, 255);  
         h_ptr[9] = CLIP(((20 * (src[9] + src[10]) - 3 * (((src[8] + src[11])<<1) - (src[7] + src[12])) - (src[6] + src[13]) + round_add) >> 5), 0, 255);  
         h_ptr[10] = CLIP(((20 * (src[10] + src[11]) - 3 * (((src[9] + src[12])<<1) - (src[8] + src[13])) - (src[7] + src[14]) + round_add) >> 5), 0, 255);  
         h_ptr[11] = CLIP(((20 * (src[11] + src[12]) - 3 * (((src[10] + src[13])<<1) - (src[9] + src[14])) - (src[8] + src[15]) + round_add) >> 5), 0, 255);  
         h_ptr[12] = CLIP(((20 * (src[12] + src[13]) - 3 * (((src[11] + src[14])<<1) - (src[10] + src[15])) - (src[9] + src[16]) + round_add) >> 5), 0, 255);  
   
         h_ptr[13] = CLIP(((20 * (src[13] + src[14]) + (src[16]<<1) + 3 * (src[11] - ((src[12] + src[15]) << 1)) - src[10] + round_add) >> 5), 0, 255);  
         h_ptr[14] = CLIP(((19 * src[15] + 20 * src[14] + 3 * (src[12] - src[16] - (src[13] << 1)) - src[11] + round_add) >> 5), 0, 255);  
         h_ptr[15] = CLIP(((23 * src[15] + 7 * ((src[16]<<1) - src[14]) + 3 * src[13] - src[12] + round_add) >> 5), 0, 255);  
   
         h_ptr += stride;  
         src += stride;  
     }  
   
         interpolate16x16_lowpass_v_c(dst1, dst2, stride, rounding);  
   
147  }  }
   
 void interpolate8x8_lowpass_hv_c(uint8_t *dst1, uint8_t *dst2, uint8_t *src, int32_t stride, int32_t rounding)  
 {  
         int32_t i;  
         uint8_t round_add = 16 - rounding;  
         uint8_t *h_ptr = dst2;  
   
     for(i = 0; i < 9; i++)  
     {  
   
         h_ptr[0] = CLIP(((7 * ((src[0]<<1) - src[2]) + 23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);  
         h_ptr[1] = CLIP(((19 * src[1] + 20 * src[2] - src[5] + 3 * (src[4] - src[0] - (src[3]<<1)) + round_add) >> 5), 0, 255);  
         h_ptr[2] = CLIP(((20 * (src[2] + src[3]) + (src[0]<<1) + 3 * (src[5] - ((src[1] + src[4])<<1)) - src[6] + round_add) >> 5), 0, 255);  
         h_ptr[3] = CLIP(((20 * (src[3] + src[4]) + 3 * ((src[6] + src[1]) - ((src[2] + src[5])<<1)) - (src[0] + src[7]) + round_add) >> 5), 0, 255);  
         h_ptr[4] = CLIP(((20 * (src[4] + src[5]) - 3 * (((src[3] + src[6])<<1) - (src[2] + src[7])) - (src[1] + src[8]) + round_add) >> 5), 0, 255);  
         h_ptr[5] = CLIP(((20 * (src[5] + src[6]) + (src[8]<<1) + 3 * (src[3] - ((src[4] + src[7]) << 1)) - src[2] + round_add) >> 5), 0, 255);  
         h_ptr[6] = CLIP(((19 * src[7] + 20 * src[6] + 3 * (src[4] - src[8] - (src[5] << 1)) - src[3] + round_add) >> 5), 0, 255);  
         h_ptr[7] = CLIP(((23 * src[7] + 7 * ((src[8]<<1) - src[6]) + 3 * src[5] - src[4] + round_add) >> 5), 0, 255);  
   
         h_ptr += stride;  
         src += stride;  
148      }      }
   
         interpolate8x8_lowpass_v_c(dst1, dst2, stride, rounding);  
   
149  }  }
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