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revision 1.4.2.1, Sat Oct 5 21:30:59 2002 UTC revision 1.7, Tue Nov 26 23:44:10 2002 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   *************************************************************************/   *  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   *      History:   *    - Japan
30     *    - United States of America
31   *   *
32   *  05.10.2002  new bilinear and qpel interpolation code - Isibaar   *  Linking XviD statically or dynamically with other modules is making a
33   *      27.12.2001      modified "compensate_halfpel"   *  combined work based on XviD.  Thus, the terms and conditions of the
34   *      05.11.2001      initial version; (c)2001 peter ross <pross@cs.rmit.edu.au>   *  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     * $Id$
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;  
   
 INTERPOLATE8X8_LOWPASS_PTR interpolate8x8_lowpass_h;  
 INTERPOLATE8X8_LOWPASS_PTR interpolate8x8_lowpass_v;  
 INTERPOLATE8X8_LOWPASS_HV_PTR interpolate8x8_lowpass_hv;  
   
 INTERPOLATE8X8_6TAP_LOWPASS_PTR interpolate8x8_6tap_lowpass_h;  
 INTERPOLATE8X8_6TAP_LOWPASS_PTR interpolate8x8_6tap_lowpass_v;  
66    
67  void interpolate8x8_avg2_c(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, const uint32_t stride, const uint32_t rounding)  /* dst = interpolate(src) */
 {  
     int32_t i;  
         const int32_t round = 1 - rounding;  
   
     for(i = 0; i < 8; 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 158  Line 128 
128          }          }
129  }  }
130    
131    /* add by MinChen <chenm001@163.com> */
132    /* interpolate8x8 two pred block */
133    void
134    interpolate8x8_c(uint8_t * const dst,
135                                     const uint8_t * const src,
136                                     const uint32_t x,
137                                     const uint32_t y,
138                                     const uint32_t stride)
139    {
140            uint32_t i, j;
141    
142            for (j = 0; j < 8; j++) {
143                    for (i = 0; i < 8; i++) {
144                            int32_t tot =
145                                    ((src[(y + j) * stride + x + i] +
146                                      dst[(y + j) * stride + x + i] + 1) >> 1);
147                            dst[(y + j) * stride + x + i] = (uint8_t) tot;
148                    }
149            }
150    }
151    
152  /*************************************************************  /*************************************************************
153   * QPEL STUFF STARTS HERE                                    *   * QPEL STUFF STARTS HERE                                    *
154   *************************************************************/   *************************************************************/
155    
156  #define CLIP(X,A,B) (X < A) ? (A) : ((X > B) ? (B) : (X))  #define CLIP(X,A,B) (X < A) ? (A) : ((X > B) ? (B) : (X))
157    
158  void interpolate8x8_6tap_lowpass_h_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)  void interpolate8x8_lowpass_h(uint8_t *dst, uint8_t *src, int32_t dst_stride, int32_t src_stride, int32_t rounding)
159  {  {
160      int32_t i;      int32_t i;
         uint8_t round_add = 16 - rounding;  
161    
162      for(i = 0; i < 8; i++)      for(i = 0; i < 8; i++)
163      {      {
164            dst[0] = CLIP((((src[0] + src[1]) * 160 - (src[0] + src[2]) * 48 + (src[1] + src[3]) * 24 - (src[2] + src[4]) * 8 + (128 - rounding)) / 256), 0, 255);
165            dst[1] = CLIP((((src[1] + src[2]) * 160 - (src[0] + src[3]) * 48 + (src[0] + src[4]) * 24 - (src[1] + src[5]) * 8 + (128 - rounding)) / 256), 0, 255);
166            dst[2] = CLIP((((src[2] + src[3]) * 160 - (src[1] + src[4]) * 48 + (src[0] + src[5]) * 24 - (src[0] + src[6]) * 8 + (128 - rounding)) / 256), 0, 255);
167            dst[3] = CLIP((((src[3] + src[4]) * 160 - (src[2] + src[5]) * 48 + (src[1] + src[6]) * 24 - (src[0] + src[7]) * 8 + (128 - rounding)) / 256), 0, 255);
168            dst[4] = CLIP((((src[4] + src[5]) * 160 - (src[3] + src[6]) * 48 + (src[2] + src[7]) * 24 - (src[1] + src[8]) * 8 + (128 - rounding)) / 256), 0, 255);
169            dst[5] = CLIP((((src[5] + src[6]) * 160 - (src[4] + src[7]) * 48 + (src[3] + src[8]) * 24 - (src[2] + src[8]) * 8 + (128 - rounding)) / 256), 0, 255);
170            dst[6] = CLIP((((src[6] + src[7]) * 160 - (src[5] + src[8]) * 48 + (src[4] + src[8]) * 24 - (src[3] + src[7]) * 8 + (128 - rounding)) / 256), 0, 255);
171            dst[7] = CLIP((((src[7] + src[8]) * 160 - (src[6] + src[8]) * 48 + (src[5] + src[7]) * 24 - (src[4] + src[6]) * 8 + (128 - rounding)) / 256), 0, 255);
172    
173          dst[0] = CLIP((((src[-2] + src[3]) + 5 * (((src[0] + src[1])<<2) - (src[-1] + src[2])) + round_add) >> 5), 0, 255);          dst += dst_stride;
174          dst[1] = CLIP((((src[-1] + src[4]) + 5 * (((src[1] + src[2])<<2) - (src[0] + src[3])) + round_add) >> 5), 0, 255);          src += src_stride;
         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;  
175      }      }
176  }  }
177    
178  void interpolate8x8_lowpass_h_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)  void interpolate8x8_lowpass_v(uint8_t *dst, uint8_t *src, int32_t dst_stride, int32_t src_stride, int32_t rounding)
179  {  {
180      int32_t i;      int32_t i;
         uint8_t round_add = 16 - rounding;  
181    
182      for(i = 0; i < 8; i++)      for(i = 0; i < 8; i++)
183      {      {
184            int32_t src0 = src[0];
185            int32_t src1 = src[src_stride];
186            int32_t src2 = src[2 * src_stride];
187            int32_t src3 = src[3 * src_stride];
188            int32_t src4 = src[4 * src_stride];
189            int32_t src5 = src[5 * src_stride];
190            int32_t src6 = src[6 * src_stride];
191            int32_t src7 = src[7 * src_stride];
192            int32_t src8 = src[8 * src_stride];
193    
194                    dst[0] = CLIP((((src0 + src1) * 160 - (src0 + src2) * 48 + (src1 + src3) * 24 - (src2 + src4) * 8 + (128 - rounding)) / 256), 0, 255);
195            dst[dst_stride] = CLIP((((src1 + src2) * 160 - (src0 + src3) * 48 + (src0 + src4) * 24 - (src1 + src5) * 8 + (128 - rounding)) / 256), 0, 255);
196            dst[2 * dst_stride] = CLIP((((src2 + src3) * 160 - (src1 + src4) * 48 + (src0 + src5) * 24 - (src0 + src6) * 8 + (128 - rounding)) / 256), 0, 255);
197            dst[3 * dst_stride] = CLIP((((src3 + src4) * 160 - (src2 + src5) * 48 + (src1 + src6) * 24 - (src0 + src7) * 8 + (128 - rounding)) / 256), 0, 255);
198            dst[4 * dst_stride] = CLIP((((src4 + src5) * 160 - (src3 + src6) * 48 + (src2 + src7) * 24 - (src1 + src8) * 8 + (128 - rounding)) / 256), 0, 255);
199            dst[5 * dst_stride] = CLIP((((src5 + src6) * 160 - (src4 + src7) * 48 + (src3 + src8) * 24 - (src2 + src8) * 8 + (128 - rounding)) / 256), 0, 255);
200            dst[6 * dst_stride] = CLIP((((src6 + src7) * 160 - (src5 + src8) * 48 + (src4 + src8) * 24 - (src3 + src7) * 8 + (128 - rounding)) / 256), 0, 255);
201            dst[7 * dst_stride] = CLIP((((src7 + src8) * 160 - (src6 + src8) * 48 + (src5 + src7) * 24 - (src4 + src6) * 8 + (128 - rounding)) / 256), 0, 255);
202    
203          dst[0] = CLIP(((7 * ((src[0]<<1) - src[2]) + 23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);                  dst++;
204          dst[1] = CLIP(((19 * src[1] + 20 * src[2] - src[5] + 3 * (src[4] - src[0] - (src[3]<<1)) + round_add) >> 5), 0, 255);          src++;
         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;  
205      }      }
206  }  }
207    
208  void interpolate8x8_6tap_lowpass_v_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)  void interpolate8x8_lowpass_hv(uint8_t *dst1, uint8_t *dst2, uint8_t *src, int32_t dst1_stride, int32_t dst2_stride, int32_t src_stride, int32_t rounding)
209  {  {
210        uint8_t data[72];
211    
212      int32_t i;      int32_t i;
213          uint8_t round_add = 16 - rounding;  
214    
215        for(i = 0; i < 9; i++)
216        {
217            dst2[0] = data[8 * i + 0] = CLIP((((src[0] + src[1]) * 160 - (src[0] + src[2]) * 48 + (src[1] + src[3]) * 24 - (src[2] + src[4]) * 8 + (128 - rounding)) / 256), 0, 255);
218            dst2[1] = data[8 * i + 1] = CLIP((((src[1] + src[2]) * 160 - (src[0] + src[3]) * 48 + (src[0] + src[4]) * 24 - (src[1] + src[5]) * 8 + (128 - rounding)) / 256), 0, 255);
219            dst2[2] = data[8 * i + 2] = CLIP((((src[2] + src[3]) * 160 - (src[1] + src[4]) * 48 + (src[0] + src[5]) * 24 - (src[0] + src[6]) * 8 + (128 - rounding)) / 256), 0, 255);
220            dst2[3] = data[8 * i + 3] = CLIP((((src[3] + src[4]) * 160 - (src[2] + src[5]) * 48 + (src[1] + src[6]) * 24 - (src[0] + src[7]) * 8 + (128 - rounding)) / 256), 0, 255);
221            dst2[4] = data[8 * i + 4] = CLIP((((src[4] + src[5]) * 160 - (src[3] + src[6]) * 48 + (src[2] + src[7]) * 24 - (src[1] + src[8]) * 8 + (128 - rounding)) / 256), 0, 255);
222            dst2[5] = data[8 * i + 5] = CLIP((((src[5] + src[6]) * 160 - (src[4] + src[7]) * 48 + (src[3] + src[8]) * 24 - (src[2] + src[8]) * 8 + (128 - rounding)) / 256), 0, 255);
223            dst2[6] = data[8 * i + 6] = CLIP((((src[6] + src[7]) * 160 - (src[5] + src[8]) * 48 + (src[4] + src[8]) * 24 - (src[3] + src[7]) * 8 + (128 - rounding)) / 256), 0, 255);
224            dst2[7] = data[8 * i + 7] = CLIP((((src[7] + src[8]) * 160 - (src[6] + src[8]) * 48 + (src[5] + src[7]) * 24 - (src[4] + src[6]) * 8 + (128 - rounding)) / 256), 0, 255);
225    
226            src += src_stride;
227                    dst2 += dst2_stride;
228        }
229    
230      for(i = 0; i < 8; i++)      for(i = 0; i < 8; i++)
231      {      {
232          int32_t src_2 = src[-2*stride];          int32_t src0 = data[i];
233          int32_t src_1 = src[-stride];          int32_t src1 = data[8 + i];
234          int32_t src0 = src[0];          int32_t src2 = data[2 * 8 + i];
235          int32_t src1 = src[stride];          int32_t src3 = data[3 * 8 + i];
236          int32_t src2 = src[2 * stride];          int32_t src4 = data[4 * 8 + i];
237          int32_t src3 = src[3 * stride];          int32_t src5 = data[5 * 8 + i];
238          int32_t src4 = src[4 * stride];          int32_t src6 = data[6 * 8 + i];
239          int32_t src5 = src[5 * stride];          int32_t src7 = data[7 * 8 + i];
240          int32_t src6 = src[6 * stride];          int32_t src8 = data[8 * 8 + i];
241          int32_t src7 = src[7 * stride];  
242          int32_t src8 = src[8 * stride];                  dst1[0] = CLIP((((src0 + src1) * 160 - (src0 + src2) * 48 + (src1 + src3) * 24 - (src2 + src4) * 8 + (128 - rounding)) / 256), 0, 255);
243          int32_t src9 = src[9 * stride];          dst1[dst1_stride] = CLIP((((src1 + src2) * 160 - (src0 + src3) * 48 + (src0 + src4) * 24 - (src1 + src5) * 8 + (128 - rounding)) / 256), 0, 255);
244          int32_t src10 = src[10 * stride];          dst1[2 * dst1_stride] = CLIP((((src2 + src3) * 160 - (src1 + src4) * 48 + (src0 + src5) * 24 - (src0 + src6) * 8 + (128 - rounding)) / 256), 0, 255);
245            dst1[3 * dst1_stride] = CLIP((((src3 + src4) * 160 - (src2 + src5) * 48 + (src1 + src6) * 24 - (src0 + src7) * 8 + (128 - rounding)) / 256), 0, 255);
246          dst[0]                  = CLIP((((src_2 + src3) + 5 * (((src0 + src1)<<2) - (src_1 + src2)) + round_add) >> 5), 0, 255);          dst1[4 * dst1_stride] = CLIP((((src4 + src5) * 160 - (src3 + src6) * 48 + (src2 + src7) * 24 - (src1 + src8) * 8 + (128 - rounding)) / 256), 0, 255);
247          dst[stride]             = CLIP((((src_1 + src4) + 5 * (((src1 + src2)<<2) - (src0 + src3)) + round_add) >> 5), 0, 255);          dst1[5 * dst1_stride] = CLIP((((src5 + src6) * 160 - (src4 + src7) * 48 + (src3 + src8) * 24 - (src2 + src8) * 8 + (128 - rounding)) / 256), 0, 255);
248          dst[2 * stride] = CLIP((((src0 + src5) + 5 * (((src2 + src3)<<2) - (src1 + src4)) + round_add) >> 5), 0, 255);          dst1[6 * dst1_stride] = CLIP((((src6 + src7) * 160 - (src5 + src8) * 48 + (src4 + src8) * 24 - (src3 + src7) * 8 + (128 - rounding)) / 256), 0, 255);
249          dst[3 * stride] = CLIP((((src1 + src6) + 5 * (((src3 + src4)<<2) - (src2 + src5)) + round_add) >> 5), 0, 255);          dst1[7 * dst1_stride] = CLIP((((src7 + src8) * 160 - (src6 + src8) * 48 + (src5 + src7) * 24 - (src4 + src6) * 8 + (128 - rounding)) / 256), 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);  
250    
251                  dst++;                  dst1++;
         src++;  
252      }      }
253  }  }
254    
255  void interpolate8x8_lowpass_v_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)  void interpolate8x8_bilinear2(uint8_t *dst, uint8_t *src1, uint8_t *src2, int32_t dst_stride, int32_t src_stride, int32_t rounding)
256  {  {
257      int32_t i;      int32_t i;
         uint8_t round_add = 16 - rounding;  
258    
259      for(i = 0; i < 8; i++)      for(i = 0; i < 8; i++)
260      {      {
261          int32_t src0 = src[0];          dst[0] = (src1[0] + src2[0] + (1 - rounding)) >> 1;
262          int32_t src1 = src[stride];          dst[1] = (src1[1] + src2[1] + (1 - rounding)) >> 1;
263          int32_t src2 = src[2 * stride];          dst[2] = (src1[2] + src2[2] + (1 - rounding)) >> 1;
264          int32_t src3 = src[3 * stride];          dst[3] = (src1[3] + src2[3] + (1 - rounding)) >> 1;
265          int32_t src4 = src[4 * stride];          dst[4] = (src1[4] + src2[4] + (1 - rounding)) >> 1;
266          int32_t src5 = src[5 * stride];          dst[5] = (src1[5] + src2[5] + (1 - rounding)) >> 1;
267          int32_t src6 = src[6 * stride];          dst[6] = (src1[6] + src2[6] + (1 - rounding)) >> 1;
268          int32_t src7 = src[7 * stride];          dst[7] = (src1[7] + src2[7] + (1 - rounding)) >> 1;
269          int32_t src8 = src[8 * stride];  
270            dst += dst_stride;
271          dst[0]                  = CLIP(((7 * ((src0<<1) - src2) + 23 * src1 + 3 * src3 - src4 + round_add) >> 5), 0, 255);          src1 += src_stride;
272          dst[stride]             = CLIP(((19 * src1 + 20 * src2 - src5 + 3 * (src4 - src0 - (src3 << 1)) + round_add) >> 5), 0, 255);          src2 += 8;
         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++;  
273      }      }
274  }  }
275    
276  void interpolate8x8_lowpass_hv_c(uint8_t *dst1, uint8_t *dst2, uint8_t *src, int32_t stride, int32_t rounding)  void interpolate8x8_bilinear4(uint8_t *dst, uint8_t *src1, uint8_t *src2, uint8_t *src3, uint8_t *src4, int32_t stride, int32_t rounding)
277  {  {
278          int32_t i;          int32_t i;
         uint8_t round_add = 16 - rounding;  
         uint8_t *h_ptr = dst2;  
279    
280      for(i = 0; i < 9; i++)      for(i = 0; i < 8; i++)
281      {      {
282            dst[0] = (src1[0] + src2[0] + src3[0] + src4[0] + (2 - rounding)) >> 2;
283            dst[1] = (src1[1] + src2[1] + src3[1] + src4[1] + (2 - rounding)) >> 2;
284            dst[2] = (src1[2] + src2[2] + src3[2] + src4[2] + (2 - rounding)) >> 2;
285            dst[3] = (src1[3] + src2[3] + src3[3] + src4[3] + (2 - rounding)) >> 2;
286            dst[4] = (src1[4] + src2[4] + src3[4] + src4[4] + (2 - rounding)) >> 2;
287            dst[5] = (src1[5] + src2[5] + src3[5] + src4[5] + (2 - rounding)) >> 2;
288            dst[6] = (src1[6] + src2[6] + src3[6] + src4[6] + (2 - rounding)) >> 2;
289            dst[7] = (src1[7] + src2[7] + src3[7] + src4[7] + (2 - rounding)) >> 2;
290    
291          h_ptr[0] = CLIP(((7 * ((src[0]<<1) - src[2]) + 23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);                  dst += stride;
292          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);          src1 += stride;
293          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);          src2 += 8;
294          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);          src3 += 8;
295          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);          src4 += 8;
         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;  
296      }      }
   
         interpolate8x8_lowpass_v_c(dst1, dst2, stride, rounding);  
   
297  }  }
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