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revision 1.9, Tue Feb 11 21:56:31 2003 UTC revision 1.10, Sat Feb 15 15:22:18 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   *  Copyright(C) 2002 Peter Ross <pross@xvid.org>   *      This program is free software; you can redistribute it and/or modify
7   *  Copyright(C) 2002 MinChen <chenm002@163.com>   *      it under the terms of the GNU General Public License as published by
  *  
  *  This file is part of XviD, a free MPEG-4 video encoder/decoder  
  *  
  *  XviD is free software; you can redistribute it and/or modify it  
  *  under the terms of the GNU General Public License as published by  
8   *  the Free Software Foundation; either version 2 of the License, or   *  the Free Software Foundation; either version 2 of the License, or
9   *  (at your option) any later version.   *  (at your option) any later version.
10   *   *
# Line 20  Line 15 
15   *   *
16   *  You should have received a copy of the GNU General Public License   *  You should have received a copy of the GNU General Public License
17   *  along with this program; if not, write to the Free Software   *  along with this program; if not, write to the Free Software
18   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA   *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19     *
20     *************************************************************************/
21    
22    /**************************************************************************
23   *   *
24   *  Under section 8 of the GNU General Public License, the copyright   *      History:
  *  holders of XVID explicitly forbid distribution in the following  
  *  countries:  
  *  
  *    - Japan  
  *    - United States of America  
  *  
  *  Linking XviD statically or dynamically with other modules is making a  
  *  combined work based on XviD.  Thus, the terms and conditions of the  
  *  GNU General Public License cover the whole combination.  
  *  
  *  As a special exception, the copyright holders of XviD give you  
  *  permission to link XviD with independent modules that communicate with  
  *  XviD solely through the VFW1.1 and DShow interfaces, regardless of the  
  *  license terms of these independent modules, and to copy and distribute  
  *  the resulting combined work under terms of your choice, provided that  
  *  every copy of the combined work is accompanied by a complete copy of  
  *  the source code of XviD (the version of XviD used to produce the  
  *  combined work), being distributed under the terms of the GNU General  
  *  Public License plus this exception.  An independent module is a module  
  *  which is not derived from or based on XviD.  
  *  
  *  Note that people who make modified versions of XviD are not obligated  
  *  to grant this special exception for their modified versions; it is  
  *  their choice whether to do so.  The GNU General Public License gives  
  *  permission to release a modified version without this exception; this  
  *  exception also makes it possible to release a modified version which  
  *  carries forward this exception.  
25   *   *
26   * $Id$   *  05.10.2002  new bilinear and qpel interpolation code - Isibaar
27     *      27.12.2001      modified "compensate_halfpel"
28     *      05.11.2001      initial version; (c)2001 peter ross <pross@cs.rmit.edu.au>
29   *   *
30   ****************************************************************************/   *************************************************************************/
31    
32    
33  #include "../portab.h"  #include "../portab.h"
34    #include "../global.h"
35  #include "interpolate8x8.h"  #include "interpolate8x8.h"
36    
37  /* function pointers */  // function pointers
38  INTERPOLATE8X8_PTR interpolate8x8_halfpel_h;  INTERPOLATE8X8_PTR interpolate8x8_halfpel_h;
39  INTERPOLATE8X8_PTR interpolate8x8_halfpel_v;  INTERPOLATE8X8_PTR interpolate8x8_halfpel_v;
40  INTERPOLATE8X8_PTR interpolate8x8_halfpel_hv;  INTERPOLATE8X8_PTR interpolate8x8_halfpel_hv;
41    
42    INTERPOLATE8X8_AVG2_PTR interpolate8x8_avg2;
43    INTERPOLATE8X8_AVG4_PTR interpolate8x8_avg4;
44    
45    INTERPOLATE_LOWPASS_PTR interpolate8x8_lowpass_h;
46    INTERPOLATE_LOWPASS_PTR interpolate8x8_lowpass_v;
47    
48    INTERPOLATE_LOWPASS_PTR interpolate16x16_lowpass_h;
49    INTERPOLATE_LOWPASS_PTR interpolate16x16_lowpass_v;
50    
51    INTERPOLATE_LOWPASS_HV_PTR interpolate8x8_lowpass_hv;
52    INTERPOLATE_LOWPASS_HV_PTR interpolate16x16_lowpass_hv;
53    
54    INTERPOLATE8X8_6TAP_LOWPASS_PTR interpolate8x8_6tap_lowpass_h;
55    INTERPOLATE8X8_6TAP_LOWPASS_PTR interpolate8x8_6tap_lowpass_v;
56    
57    void interpolate8x8_avg2_c(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, const uint32_t stride, const uint32_t rounding, const uint32_t height)
58    {
59        uint32_t i;
60            const int32_t round = 1 - rounding;
61    
62        for(i = 0; i < height; i++)
63        {
64            dst[0] = (src1[0] + src2[0] + round) >> 1;
65            dst[1] = (src1[1] + src2[1] + round) >> 1;
66            dst[2] = (src1[2] + src2[2] + round) >> 1;
67            dst[3] = (src1[3] + src2[3] + round) >> 1;
68            dst[4] = (src1[4] + src2[4] + round) >> 1;
69            dst[5] = (src1[5] + src2[5] + round) >> 1;
70            dst[6] = (src1[6] + src2[6] + round) >> 1;
71            dst[7] = (src1[7] + src2[7] + round) >> 1;
72    
73            dst += stride;
74            src1 += stride;
75            src2 += stride;
76        }
77    }
78    
79  /* dst = interpolate(src) */  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)
80    {
81        int32_t i;
82            const int32_t round = 2 - rounding;
83    
84        for(i = 0; i < 8; i++)
85        {
86            dst[0] = (src1[0] + src2[0] + src3[0] + src4[0] + round) >> 2;
87            dst[1] = (src1[1] + src2[1] + src3[1] + src4[1] + round) >> 2;
88            dst[2] = (src1[2] + src2[2] + src3[2] + src4[2] + round) >> 2;
89            dst[3] = (src1[3] + src2[3] + src3[3] + src4[3] + round) >> 2;
90            dst[4] = (src1[4] + src2[4] + src3[4] + src4[4] + round) >> 2;
91            dst[5] = (src1[5] + src2[5] + src3[5] + src4[5] + round) >> 2;
92            dst[6] = (src1[6] + src2[6] + src3[6] + src4[6] + round) >> 2;
93            dst[7] = (src1[7] + src2[7] + src3[7] + src4[7] + round) >> 2;
94    
95                    dst += stride;
96            src1 += stride;
97            src2 += stride;
98            src3 += stride;
99            src4 += stride;
100        }
101    }
102    
103    // dst = interpolate(src)
104    
105  void  void
106  interpolate8x8_halfpel_h_c(uint8_t * const dst,  interpolate8x8_halfpel_h_c(uint8_t * const dst,
# Line 77  Line 113 
113          for (j = 0; j < 8; j++) {          for (j = 0; j < 8; j++) {
114                  for (i = 0; i < 8; i++) {                  for (i = 0; i < 8; i++) {
115    
116                          int32_t tot =                          int16_t tot =
117                                  (int32_t) src[j * stride + i] + (int32_t) src[j * stride + i + 1];                                  (int32_t) src[j * stride + i] + (int32_t) src[j * stride + i +
118                                                                                                                              1];
119    
120                          tot = (tot + 1 - rounding) >> 1;                          tot = (int32_t) ((tot + 1 - rounding) >> 1);
121                          dst[j * stride + i] = (uint8_t) tot;                          dst[j * stride + i] = (uint8_t) tot;
122                  }                  }
123          }          }
# Line 98  Line 135 
135    
136          for (j = 0; j < 8; j++) {          for (j = 0; j < 8; j++) {
137                  for (i = 0; i < 8; i++) {                  for (i = 0; i < 8; i++) {
138                          int32_t tot =                          int16_t tot = src[j * stride + i] + src[j * stride + i + stride];
                                 (int32_t)src[j * stride + i] + (int32_t)src[j * stride + i + stride];  
139    
140                          tot = ((tot + 1 - rounding) >> 1);                          tot = ((tot + 1 - rounding) >> 1);
141                          dst[j * stride + i] = (uint8_t) tot;                          dst[j * stride + i] = (uint8_t) tot;
# Line 118  Line 154 
154    
155          for (j = 0; j < 8; j++) {          for (j = 0; j < 8; j++) {
156                  for (i = 0; i < 8; i++) {                  for (i = 0; i < 8; i++) {
157                          int32_t tot =                          int16_t tot =
158                                  (int32_t)src[j * stride + i] + (int32_t)src[j * stride + i + 1] +                                  src[j * stride + i] + src[j * stride + i + 1] +
159                                  (int32_t)src[j * stride + i + stride] + (int32_t)src[j * stride + i + stride + 1];                                  src[j * stride + i + stride] + src[j * stride + i + stride +
160                                                                                                       1];
161                          tot = ((tot + 2 - rounding) >> 2);                          tot = ((tot + 2 - rounding) >> 2);
162                          dst[j * stride + i] = (uint8_t) tot;                          dst[j * stride + i] = (uint8_t) tot;
163                  }                  }
164          }          }
165  }  }
166    
167  /* add by MinChen <chenm001@163.com> */  /*************************************************************
168  /* interpolate8x8 two pred block */   * QPEL STUFF STARTS HERE                                    *
169  void   *************************************************************/
170  interpolate8x8_c(uint8_t * const dst,  
171                                   const uint8_t * const src,  void interpolate8x8_6tap_lowpass_h_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)
                                  const uint32_t x,  
                                  const uint32_t y,  
                                  const uint32_t stride)  
172  {  {
173          uint32_t i, j;      int32_t i;
174            uint8_t round_add = 16 - rounding;
175    
176          for (j = 0; j < 8; j++) {      for(i = 0; i < 8; i++)
177                  for (i = 0; i < 8; i++) {      {
178                          int32_t tot =  
179                                  (((int32_t)src[(y + j) * stride + x + i] +          dst[0] = CLIP((((src[-2] + src[3]) + 5 * (((src[0] + src[1])<<2) - (src[-1] + src[2])) + round_add) >> 5), 0, 255);
180                                    (int32_t)dst[(y + j) * stride + x + i] + 1) >> 1);          dst[1] = CLIP((((src[-1] + src[4]) + 5 * (((src[1] + src[2])<<2) - (src[0] + src[3])) + round_add) >> 5), 0, 255);
181                          dst[(y + j) * stride + x + i] = (uint8_t) tot;          dst[2] = CLIP((((src[0] + src[5]) + 5 * (((src[2] + src[3])<<2) - (src[1] + src[4])) + round_add) >> 5), 0, 255);
182            dst[3] = CLIP((((src[1] + src[6]) + 5 * (((src[3] + src[4])<<2) - (src[2] + src[5])) + round_add) >> 5), 0, 255);
183            dst[4] = CLIP((((src[2] + src[7]) + 5 * (((src[4] + src[5])<<2) - (src[3] + src[6])) + round_add) >> 5), 0, 255);
184            dst[5] = CLIP((((src[3] + src[8]) + 5 * (((src[5] + src[6])<<2) - (src[4] + src[7])) + round_add) >> 5), 0, 255);
185            dst[6] = CLIP((((src[4] + src[9]) + 5 * (((src[6] + src[7])<<2) - (src[5] + src[8])) + round_add) >> 5), 0, 255);
186            dst[7] = CLIP((((src[5] + src[10]) + 5 * (((src[7] + src[8])<<2) - (src[6] + src[9])) + round_add) >> 5), 0, 255);
187    
188            dst += stride;
189            src += stride;
190        }
191    }
192    
193    void interpolate16x16_lowpass_h_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)
194    {
195        int32_t i;
196            uint8_t round_add = 16 - rounding;
197    
198        for(i = 0; i < 17; i++)
199        {
200    
201            dst[0] = CLIP(((7 * ((src[0]<<1) - src[2]) +  23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);
202            dst[1] = CLIP(((19 * src[1] + 20 * src[2] - src[5] + 3 * (src[4] - src[0] - (src[3]<<1)) + round_add) >> 5), 0, 255);
203            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);
204    
205            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);
206            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);
207            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);
208            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);
209            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);
210            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);
211            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);
212            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);
213            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);
214            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);
215    
216            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);
217            dst[14] = CLIP(((19 * src[15] + 20 * src[14] + 3 * (src[12] - src[16] - (src[13] << 1)) - src[11] + round_add) >> 5), 0, 255);
218            dst[15] = CLIP(((23 * src[15] + 7 * ((src[16]<<1) - src[14]) + 3 * src[13] - src[12] + round_add) >> 5), 0, 255);
219    
220            dst += stride;
221            src += stride;
222        }
223    }
224    
225    void interpolate8x8_lowpass_h_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)
226    {
227        int32_t i;
228            uint8_t round_add = 16 - rounding;
229    
230        for(i = 0; i < 9; i++)
231        {
232    
233            dst[0] = CLIP(((7 * ((src[0]<<1) - src[2]) + 23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);
234            dst[1] = CLIP(((19 * src[1] + 20 * src[2] - src[5] + 3 * (src[4] - src[0] - (src[3]<<1)) + round_add) >> 5), 0, 255);
235            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);
236            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);
237            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);
238            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);
239            dst[6] = CLIP(((19 * src[7] + 20 * src[6] + 3 * (src[4] - src[8] - (src[5] << 1)) - src[3] + round_add) >> 5), 0, 255);
240            dst[7] = CLIP(((23 * src[7] + 7 * ((src[8]<<1) - src[6]) + 3 * src[5] - src[4] + round_add) >> 5), 0, 255);
241    
242            dst += stride;
243            src += stride;
244        }
245    }
246    
247    void interpolate8x8_6tap_lowpass_v_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)
248    {
249        int32_t i;
250            uint8_t round_add = 16 - rounding;
251    
252        for(i = 0; i < 8; i++)
253        {
254            int32_t src_2 = src[-2*stride];
255            int32_t src_1 = src[-stride];
256            int32_t src0 = src[0];
257            int32_t src1 = src[stride];
258            int32_t src2 = src[2 * stride];
259            int32_t src3 = src[3 * stride];
260            int32_t src4 = src[4 * stride];
261            int32_t src5 = src[5 * stride];
262            int32_t src6 = src[6 * stride];
263            int32_t src7 = src[7 * stride];
264            int32_t src8 = src[8 * stride];
265            int32_t src9 = src[9 * stride];
266            int32_t src10 = src[10 * stride];
267    
268            dst[0]                  = CLIP((((src_2 + src3) + 5 * (((src0 + src1)<<2) - (src_1 + src2)) + round_add) >> 5), 0, 255);
269            dst[stride]             = CLIP((((src_1 + src4) + 5 * (((src1 + src2)<<2) - (src0 + src3)) + round_add) >> 5), 0, 255);
270            dst[2 * stride] = CLIP((((src0 + src5) + 5 * (((src2 + src3)<<2) - (src1 + src4)) + round_add) >> 5), 0, 255);
271            dst[3 * stride] = CLIP((((src1 + src6) + 5 * (((src3 + src4)<<2) - (src2 + src5)) + round_add) >> 5), 0, 255);
272            dst[4 * stride] = CLIP((((src2 + src7) + 5 * (((src4 + src5)<<2) - (src3 + src6)) + round_add) >> 5), 0, 255);
273            dst[5 * stride] = CLIP((((src3 + src8) + 5 * (((src5 + src6)<<2) - (src4 + src7)) + round_add) >> 5), 0, 255);
274            dst[6 * stride] = CLIP((((src4 + src9) + 5 * (((src6 + src7)<<2) - (src5 + src8)) + round_add) >> 5), 0, 255);
275            dst[7 * stride] = CLIP((((src5 + src10) + 5 * (((src7 + src8)<<2) - (src6 + src9)) + round_add) >> 5), 0, 255);
276    
277                    dst++;
278            src++;
279        }
280    }
281    
282    void interpolate16x16_lowpass_v_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)
283    {
284        int32_t i;
285            uint8_t round_add = 16 - rounding;
286    
287        for(i = 0; i < 17; i++)
288        {
289            int32_t src0 = src[0];
290            int32_t src1 = src[stride];
291            int32_t src2 = src[2 * stride];
292            int32_t src3 = src[3 * stride];
293            int32_t src4 = src[4 * stride];
294            int32_t src5 = src[5 * stride];
295            int32_t src6 = src[6 * stride];
296            int32_t src7 = src[7 * stride];
297            int32_t src8 = src[8 * stride];
298            int32_t src9 = src[9 * stride];
299            int32_t src10 = src[10 * stride];
300            int32_t src11 = src[11 * stride];
301            int32_t src12 = src[12 * stride];
302            int32_t src13 = src[13 * stride];
303            int32_t src14 = src[14 * stride];
304            int32_t src15 = src[15 * stride];
305            int32_t src16 = src[16 * stride];
306    
307    
308            dst[0] = CLIP(((7 * ((src0<<1) - src2) +  23 * src1 + 3 * src3 - src4 + round_add) >> 5), 0, 255);
309            dst[stride] = CLIP(((19 * src1 + 20 * src2 - src5 + 3 * (src4 - src0 - (src3<<1)) + round_add) >> 5), 0, 255);
310            dst[2*stride] = CLIP(((20 * (src2 + src3) + (src0<<1) + 3 * (src5 - ((src1 + src4)<<1)) - src6 + round_add) >> 5), 0, 255);
311    
312            dst[3*stride] = CLIP(((20 * (src3 + src4) + 3 * ((src6 + src1) - ((src2 + src5)<<1)) - (src0 + src7) + round_add) >> 5), 0, 255);
313            dst[4*stride] = CLIP(((20 * (src4 + src5) - 3 * (((src3 + src6)<<1) - (src2 + src7)) - (src1 + src8) + round_add) >> 5), 0, 255);
314            dst[5*stride] = CLIP(((20 * (src5 + src6) - 3 * (((src4 + src7)<<1) - (src3 + src8)) - (src2 + src9) + round_add) >> 5), 0, 255);
315            dst[6*stride] = CLIP(((20 * (src6 + src7) - 3 * (((src5 + src8)<<1) - (src4 + src9)) - (src3 + src10) + round_add) >> 5), 0, 255);
316            dst[7*stride] = CLIP(((20 * (src7 + src8) - 3 * (((src6 + src9)<<1) - (src5 + src10)) - (src4 + src11) + round_add) >> 5), 0, 255);
317            dst[8*stride] = CLIP(((20 * (src8 + src9) - 3 * (((src7 + src10)<<1) - (src6 + src11)) - (src5 + src12) + round_add) >> 5), 0, 255);
318            dst[9*stride] = CLIP(((20 * (src9 + src10) - 3 * (((src8 + src11)<<1) - (src7 + src12)) - (src6 + src13) + round_add) >> 5), 0, 255);
319            dst[10*stride] = CLIP(((20 * (src10 + src11) - 3 * (((src9 + src12)<<1) - (src8 + src13)) - (src7 + src14) + round_add) >> 5), 0, 255);
320            dst[11*stride] = CLIP(((20 * (src11 + src12) - 3 * (((src10 + src13)<<1) - (src9 + src14)) - (src8 + src15) + round_add) >> 5), 0, 255);
321            dst[12*stride] = CLIP(((20 * (src12 + src13) - 3 * (((src11 + src14)<<1) - (src10 + src15)) - (src9 + src16) + round_add) >> 5), 0, 255);
322    
323            dst[13*stride] = CLIP(((20 * (src13 + src14) + (src16<<1) + 3 * (src11 - ((src12 + src15) << 1)) - src10 + round_add) >> 5), 0, 255);
324            dst[14*stride] = CLIP(((19 * src15 + 20 * src14 + 3 * (src12 - src16 - (src13 << 1)) - src11 + round_add) >> 5), 0, 255);
325            dst[15*stride] = CLIP(((23 * src15 + 7 * ((src16<<1) - src14) + 3 * src13 - src12 + round_add) >> 5), 0, 255);
326    
327                    dst++;
328            src++;
329        }
330    }
331    
332    void interpolate8x8_lowpass_v_c(uint8_t *dst, uint8_t *src, int32_t stride, int32_t rounding)
333    {
334        int32_t i;
335            uint8_t round_add = 16 - rounding;
336    
337        for(i = 0; i < 9; i++)
338        {
339            int32_t src0 = src[0];
340            int32_t src1 = src[stride];
341            int32_t src2 = src[2 * stride];
342            int32_t src3 = src[3 * stride];
343            int32_t src4 = src[4 * stride];
344            int32_t src5 = src[5 * stride];
345            int32_t src6 = src[6 * stride];
346            int32_t src7 = src[7 * stride];
347            int32_t src8 = src[8 * stride];
348    
349            dst[0]                  = CLIP(((7 * ((src0<<1) - src2) + 23 * src1 + 3 * src3 - src4 + round_add) >> 5), 0, 255);
350            dst[stride]             = CLIP(((19 * src1 + 20 * src2 - src5 + 3 * (src4 - src0 - (src3 << 1)) + round_add) >> 5), 0, 255);
351            dst[2 * stride] = CLIP(((20 * (src2 + src3) + (src0<<1) + 3 * (src5 - ((src1 + src4) <<1 )) - src6 + round_add) >> 5), 0, 255);
352            dst[3 * stride] = CLIP(((20 * (src3 + src4) + 3 * ((src6 + src1) - ((src2 + src5)<<1)) - (src0 + src7) + round_add) >> 5), 0, 255);
353            dst[4 * stride] = CLIP(((20 * (src4 + src5) + 3 * ((src2 + src7) - ((src3 + src6)<<1)) - (src1 + src8) + round_add) >> 5), 0, 255);
354            dst[5 * stride] = CLIP(((20 * (src5 + src6) + (src8<<1) + 3 * (src3 - ((src4 + src7) << 1)) - src2 + round_add) >> 5), 0, 255);
355            dst[6 * stride] = CLIP(((19 * src7 + 20 * src6 - src3 + 3 * (src4 - src8 - (src5 << 1)) + round_add) >> 5), 0, 255);
356            dst[7 * stride] = CLIP(((7 * ((src8<<1) - src6) + 23 * src7 + 3 * src5 - src4 + round_add) >> 5), 0, 255);
357    
358                    dst++;
359            src++;
360        }
361    }
362    
363    void interpolate16x16_lowpass_hv_c(uint8_t *dst1, uint8_t *dst2, uint8_t *src, int32_t stride, int32_t rounding)
364    {
365            int32_t i;
366            uint8_t round_add = 16 - rounding;
367            uint8_t *h_ptr = dst2;
368    
369        for(i = 0; i < 17; i++)
370        {
371    
372            h_ptr[0] = CLIP(((7 * ((src[0]<<1) - src[2]) +  23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);
373            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);
374            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);
375    
376            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);
377            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);
378            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);
379            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);
380            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);
381            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);
382            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);
383            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);
384            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);
385            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);
386    
387            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);
388            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);
389            h_ptr[15] = CLIP(((23 * src[15] + 7 * ((src[16]<<1) - src[14]) + 3 * src[13] - src[12] + round_add) >> 5), 0, 255);
390    
391            h_ptr += stride;
392            src += stride;
393                  }                  }
394    
395            interpolate16x16_lowpass_v_c(dst1, dst2, stride, rounding);
396    
397          }          }
398    
399    void interpolate8x8_lowpass_hv_c(uint8_t *dst1, uint8_t *dst2, uint8_t *src, int32_t stride, int32_t rounding)
400    {
401            int32_t i;
402            uint8_t round_add = 16 - rounding;
403            uint8_t *h_ptr = dst2;
404    
405        for(i = 0; i < 9; i++)
406        {
407    
408            h_ptr[0] = CLIP(((7 * ((src[0]<<1) - src[2]) + 23 * src[1] + 3 * src[3] - src[4] + round_add) >> 5), 0, 255);
409            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);
410            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);
411            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);
412            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);
413            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);
414            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);
415            h_ptr[7] = CLIP(((23 * src[7] + 7 * ((src[8]<<1) - src[6]) + 3 * src[5] - src[4] + round_add) >> 5), 0, 255);
416    
417            h_ptr += stride;
418            src += stride;
419        }
420    
421            interpolate8x8_lowpass_v_c(dst1, dst2, stride, rounding);
422    
423  }  }

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