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ivi_dsp.c
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1 /*
2  * DSP functions for Indeo Video Interactive codecs (Indeo4 and Indeo5)
3  *
4  * Copyright (c) 2009-2011 Maxim Poliakovski
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * DSP functions (inverse transforms, motion compensation, wavelet recompostions)
26  * for Indeo Video Interactive codecs.
27  */
28 
29 #include "avcodec.h"
30 #include "ivi.h"
31 #include "ivi_dsp.h"
32 
34  const int dst_pitch)
35 {
36  int x, y, indx;
37  int32_t p0, p1, p2, p3, tmp0, tmp1, tmp2;
38  int32_t b0_1, b0_2, b1_1, b1_2, b1_3, b2_1, b2_2, b2_3, b2_4, b2_5, b2_6;
39  int32_t b3_1, b3_2, b3_3, b3_4, b3_5, b3_6, b3_7, b3_8, b3_9;
40  int32_t pitch, back_pitch;
41  const short *b0_ptr, *b1_ptr, *b2_ptr, *b3_ptr;
42  const int num_bands = 4;
43 
44  /* all bands should have the same pitch */
45  pitch = plane->bands[0].pitch;
46 
47  /* pixels at the position "y-1" will be set to pixels at the "y" for the 1st iteration */
48  back_pitch = 0;
49 
50  /* get pointers to the wavelet bands */
51  b0_ptr = plane->bands[0].buf;
52  b1_ptr = plane->bands[1].buf;
53  b2_ptr = plane->bands[2].buf;
54  b3_ptr = plane->bands[3].buf;
55 
56  for (y = 0; y < plane->height; y += 2) {
57 
58  if (y+2 >= plane->height)
59  pitch= 0;
60  /* load storage variables with values */
61  if (num_bands > 0) {
62  b0_1 = b0_ptr[0];
63  b0_2 = b0_ptr[pitch];
64  }
65 
66  if (num_bands > 1) {
67  b1_1 = b1_ptr[back_pitch];
68  b1_2 = b1_ptr[0];
69  b1_3 = b1_1 - b1_2*6 + b1_ptr[pitch];
70  }
71 
72  if (num_bands > 2) {
73  b2_2 = b2_ptr[0]; // b2[x, y ]
74  b2_3 = b2_2; // b2[x+1,y ] = b2[x,y]
75  b2_5 = b2_ptr[pitch]; // b2[x ,y+1]
76  b2_6 = b2_5; // b2[x+1,y+1] = b2[x,y+1]
77  }
78 
79  if (num_bands > 3) {
80  b3_2 = b3_ptr[back_pitch]; // b3[x ,y-1]
81  b3_3 = b3_2; // b3[x+1,y-1] = b3[x ,y-1]
82  b3_5 = b3_ptr[0]; // b3[x ,y ]
83  b3_6 = b3_5; // b3[x+1,y ] = b3[x ,y ]
84  b3_8 = b3_2 - b3_5*6 + b3_ptr[pitch];
85  b3_9 = b3_8;
86  }
87 
88  for (x = 0, indx = 0; x < plane->width; x+=2, indx++) {
89  if (x+2 >= plane->width) {
90  b0_ptr --;
91  b1_ptr --;
92  b2_ptr --;
93  b3_ptr --;
94  }
95 
96  /* some values calculated in the previous iterations can */
97  /* be reused in the next ones, so do appropriate copying */
98  b2_1 = b2_2; // b2[x-1,y ] = b2[x, y ]
99  b2_2 = b2_3; // b2[x ,y ] = b2[x+1,y ]
100  b2_4 = b2_5; // b2[x-1,y+1] = b2[x ,y+1]
101  b2_5 = b2_6; // b2[x ,y+1] = b2[x+1,y+1]
102  b3_1 = b3_2; // b3[x-1,y-1] = b3[x ,y-1]
103  b3_2 = b3_3; // b3[x ,y-1] = b3[x+1,y-1]
104  b3_4 = b3_5; // b3[x-1,y ] = b3[x ,y ]
105  b3_5 = b3_6; // b3[x ,y ] = b3[x+1,y ]
106  b3_7 = b3_8; // vert_HPF(x-1)
107  b3_8 = b3_9; // vert_HPF(x )
108 
109  p0 = p1 = p2 = p3 = 0;
110 
111  /* process the LL-band by applying LPF both vertically and horizontally */
112  if (num_bands > 0) {
113  tmp0 = b0_1;
114  tmp2 = b0_2;
115  b0_1 = b0_ptr[indx+1];
116  b0_2 = b0_ptr[pitch+indx+1];
117  tmp1 = tmp0 + b0_1;
118 
119  p0 = tmp0 << 4;
120  p1 = tmp1 << 3;
121  p2 = (tmp0 + tmp2) << 3;
122  p3 = (tmp1 + tmp2 + b0_2) << 2;
123  }
124 
125  /* process the HL-band by applying HPF vertically and LPF horizontally */
126  if (num_bands > 1) {
127  tmp0 = b1_2;
128  tmp1 = b1_1;
129  b1_2 = b1_ptr[indx+1];
130  b1_1 = b1_ptr[back_pitch+indx+1];
131 
132  tmp2 = tmp1 - tmp0*6 + b1_3;
133  b1_3 = b1_1 - b1_2*6 + b1_ptr[pitch+indx+1];
134 
135  p0 += (tmp0 + tmp1) << 3;
136  p1 += (tmp0 + tmp1 + b1_1 + b1_2) << 2;
137  p2 += tmp2 << 2;
138  p3 += (tmp2 + b1_3) << 1;
139  }
140 
141  /* process the LH-band by applying LPF vertically and HPF horizontally */
142  if (num_bands > 2) {
143  b2_3 = b2_ptr[indx+1];
144  b2_6 = b2_ptr[pitch+indx+1];
145 
146  tmp0 = b2_1 + b2_2;
147  tmp1 = b2_1 - b2_2*6 + b2_3;
148 
149  p0 += tmp0 << 3;
150  p1 += tmp1 << 2;
151  p2 += (tmp0 + b2_4 + b2_5) << 2;
152  p3 += (tmp1 + b2_4 - b2_5*6 + b2_6) << 1;
153  }
154 
155  /* process the HH-band by applying HPF both vertically and horizontally */
156  if (num_bands > 3) {
157  b3_6 = b3_ptr[indx+1]; // b3[x+1,y ]
158  b3_3 = b3_ptr[back_pitch+indx+1]; // b3[x+1,y-1]
159 
160  tmp0 = b3_1 + b3_4;
161  tmp1 = b3_2 + b3_5;
162  tmp2 = b3_3 + b3_6;
163 
164  b3_9 = b3_3 - b3_6*6 + b3_ptr[pitch+indx+1];
165 
166  p0 += (tmp0 + tmp1) << 2;
167  p1 += (tmp0 - tmp1*6 + tmp2) << 1;
168  p2 += (b3_7 + b3_8) << 1;
169  p3 += b3_7 - b3_8*6 + b3_9;
170  }
171 
172  /* output four pixels */
173  dst[x] = av_clip_uint8((p0 >> 6) + 128);
174  dst[x+1] = av_clip_uint8((p1 >> 6) + 128);
175  dst[dst_pitch+x] = av_clip_uint8((p2 >> 6) + 128);
176  dst[dst_pitch+x+1] = av_clip_uint8((p3 >> 6) + 128);
177  }// for x
178 
179  dst += dst_pitch << 1;
180 
181  back_pitch = -pitch;
182 
183  b0_ptr += pitch + 1;
184  b1_ptr += pitch + 1;
185  b2_ptr += pitch + 1;
186  b3_ptr += pitch + 1;
187  }
188 }
189 
191  const int dst_pitch)
192 {
193  int x, y, indx, b0, b1, b2, b3, p0, p1, p2, p3;
194  const short *b0_ptr, *b1_ptr, *b2_ptr, *b3_ptr;
195  int32_t pitch;
196 
197  /* all bands should have the same pitch */
198  pitch = plane->bands[0].pitch;
199 
200  /* get pointers to the wavelet bands */
201  b0_ptr = plane->bands[0].buf;
202  b1_ptr = plane->bands[1].buf;
203  b2_ptr = plane->bands[2].buf;
204  b3_ptr = plane->bands[3].buf;
205 
206  for (y = 0; y < plane->height; y += 2) {
207  for (x = 0, indx = 0; x < plane->width; x += 2, indx++) {
208  /* load coefficients */
209  b0 = b0_ptr[indx]; //should be: b0 = (num_bands > 0) ? b0_ptr[indx] : 0;
210  b1 = b1_ptr[indx]; //should be: b1 = (num_bands > 1) ? b1_ptr[indx] : 0;
211  b2 = b2_ptr[indx]; //should be: b2 = (num_bands > 2) ? b2_ptr[indx] : 0;
212  b3 = b3_ptr[indx]; //should be: b3 = (num_bands > 3) ? b3_ptr[indx] : 0;
213 
214  /* haar wavelet recomposition */
215  p0 = (b0 + b1 + b2 + b3 + 2) >> 2;
216  p1 = (b0 + b1 - b2 - b3 + 2) >> 2;
217  p2 = (b0 - b1 + b2 - b3 + 2) >> 2;
218  p3 = (b0 - b1 - b2 + b3 + 2) >> 2;
219 
220  /* bias, convert and output four pixels */
221  dst[x] = av_clip_uint8(p0 + 128);
222  dst[x + 1] = av_clip_uint8(p1 + 128);
223  dst[dst_pitch + x] = av_clip_uint8(p2 + 128);
224  dst[dst_pitch + x + 1] = av_clip_uint8(p3 + 128);
225  }// for x
226 
227  dst += dst_pitch << 1;
228 
229  b0_ptr += pitch;
230  b1_ptr += pitch;
231  b2_ptr += pitch;
232  b3_ptr += pitch;
233  }// for y
234 }
235 
236 /** butterfly operation for the inverse Haar transform */
237 #define IVI_HAAR_BFLY(s1, s2, o1, o2, t) \
238  t = ((s1) - (s2)) >> 1;\
239  o1 = ((s1) + (s2)) >> 1;\
240  o2 = (t);\
241 
242 /** inverse 8-point Haar transform */
243 #define INV_HAAR8(s1, s5, s3, s7, s2, s4, s6, s8,\
244  d1, d2, d3, d4, d5, d6, d7, d8,\
245  t0, t1, t2, t3, t4, t5, t6, t7, t8) {\
246  t1 = (s1) << 1; t5 = (s5) << 1;\
247  IVI_HAAR_BFLY(t1, t5, t1, t5, t0); IVI_HAAR_BFLY(t1, s3, t1, t3, t0);\
248  IVI_HAAR_BFLY(t5, s7, t5, t7, t0); IVI_HAAR_BFLY(t1, s2, t1, t2, t0);\
249  IVI_HAAR_BFLY(t3, s4, t3, t4, t0); IVI_HAAR_BFLY(t5, s6, t5, t6, t0);\
250  IVI_HAAR_BFLY(t7, s8, t7, t8, t0);\
251  d1 = COMPENSATE(t1);\
252  d2 = COMPENSATE(t2);\
253  d3 = COMPENSATE(t3);\
254  d4 = COMPENSATE(t4);\
255  d5 = COMPENSATE(t5);\
256  d6 = COMPENSATE(t6);\
257  d7 = COMPENSATE(t7);\
258  d8 = COMPENSATE(t8); }
259 
260 /** inverse 4-point Haar transform */
261 #define INV_HAAR4(s1, s3, s5, s7, d1, d2, d3, d4, t0, t1, t2, t3, t4) {\
262  IVI_HAAR_BFLY(s1, s3, t0, t1, t4);\
263  IVI_HAAR_BFLY(t0, s5, t2, t3, t4);\
264  d1 = COMPENSATE(t2);\
265  d2 = COMPENSATE(t3);\
266  IVI_HAAR_BFLY(t1, s7, t2, t3, t4);\
267  d3 = COMPENSATE(t2);\
268  d4 = COMPENSATE(t3); }
269 
270 void ff_ivi_inverse_haar_8x8(const int32_t *in, int16_t *out, uint32_t pitch,
271  const uint8_t *flags)
272 {
273  int i, shift, sp1, sp2, sp3, sp4;
274  const int32_t *src;
275  int32_t *dst;
276  int tmp[64];
277  int t0, t1, t2, t3, t4, t5, t6, t7, t8;
278 
279  /* apply the InvHaar8 to all columns */
280 #define COMPENSATE(x) (x)
281  src = in;
282  dst = tmp;
283  for (i = 0; i < 8; i++) {
284  if (flags[i]) {
285  /* pre-scaling */
286  shift = !(i & 4);
287  sp1 = src[ 0] << shift;
288  sp2 = src[ 8] << shift;
289  sp3 = src[16] << shift;
290  sp4 = src[24] << shift;
291  INV_HAAR8( sp1, sp2, sp3, sp4,
292  src[32], src[40], src[48], src[56],
293  dst[ 0], dst[ 8], dst[16], dst[24],
294  dst[32], dst[40], dst[48], dst[56],
295  t0, t1, t2, t3, t4, t5, t6, t7, t8);
296  } else
297  dst[ 0] = dst[ 8] = dst[16] = dst[24] =
298  dst[32] = dst[40] = dst[48] = dst[56] = 0;
299 
300  src++;
301  dst++;
302  }
303 #undef COMPENSATE
304 
305  /* apply the InvHaar8 to all rows */
306 #define COMPENSATE(x) (x)
307  src = tmp;
308  for (i = 0; i < 8; i++) {
309  if ( !src[0] && !src[1] && !src[2] && !src[3]
310  && !src[4] && !src[5] && !src[6] && !src[7]) {
311  memset(out, 0, 8 * sizeof(out[0]));
312  } else {
313  INV_HAAR8(src[0], src[1], src[2], src[3],
314  src[4], src[5], src[6], src[7],
315  out[0], out[1], out[2], out[3],
316  out[4], out[5], out[6], out[7],
317  t0, t1, t2, t3, t4, t5, t6, t7, t8);
318  }
319  src += 8;
320  out += pitch;
321  }
322 #undef COMPENSATE
323 }
324 
325 void ff_ivi_row_haar8(const int32_t *in, int16_t *out, uint32_t pitch,
326  const uint8_t *flags)
327 {
328  int i;
329  int t0, t1, t2, t3, t4, t5, t6, t7, t8;
330 
331  /* apply the InvHaar8 to all rows */
332 #define COMPENSATE(x) (x)
333  for (i = 0; i < 8; i++) {
334  if ( !in[0] && !in[1] && !in[2] && !in[3]
335  && !in[4] && !in[5] && !in[6] && !in[7]) {
336  memset(out, 0, 8 * sizeof(out[0]));
337  } else {
338  INV_HAAR8(in[0], in[1], in[2], in[3],
339  in[4], in[5], in[6], in[7],
340  out[0], out[1], out[2], out[3],
341  out[4], out[5], out[6], out[7],
342  t0, t1, t2, t3, t4, t5, t6, t7, t8);
343  }
344  in += 8;
345  out += pitch;
346  }
347 #undef COMPENSATE
348 }
349 
350 void ff_ivi_col_haar8(const int32_t *in, int16_t *out, uint32_t pitch,
351  const uint8_t *flags)
352 {
353  int i;
354  int t0, t1, t2, t3, t4, t5, t6, t7, t8;
355 
356  /* apply the InvHaar8 to all columns */
357 #define COMPENSATE(x) (x)
358  for (i = 0; i < 8; i++) {
359  if (flags[i]) {
360  INV_HAAR8(in[ 0], in[ 8], in[16], in[24],
361  in[32], in[40], in[48], in[56],
362  out[0 * pitch], out[1 * pitch],
363  out[2 * pitch], out[3 * pitch],
364  out[4 * pitch], out[5 * pitch],
365  out[6 * pitch], out[7 * pitch],
366  t0, t1, t2, t3, t4, t5, t6, t7, t8);
367  } else
368  out[0 * pitch] = out[1 * pitch] =
369  out[2 * pitch] = out[3 * pitch] =
370  out[4 * pitch] = out[5 * pitch] =
371  out[6 * pitch] = out[7 * pitch] = 0;
372 
373  in++;
374  out++;
375  }
376 #undef COMPENSATE
377 }
378 
379 void ff_ivi_inverse_haar_4x4(const int32_t *in, int16_t *out, uint32_t pitch,
380  const uint8_t *flags)
381 {
382  int i, shift, sp1, sp2;
383  const int32_t *src;
384  int32_t *dst;
385  int tmp[16];
386  int t0, t1, t2, t3, t4;
387 
388  /* apply the InvHaar4 to all columns */
389 #define COMPENSATE(x) (x)
390  src = in;
391  dst = tmp;
392  for (i = 0; i < 4; i++) {
393  if (flags[i]) {
394  /* pre-scaling */
395  shift = !(i & 2);
396  sp1 = src[0] << shift;
397  sp2 = src[4] << shift;
398  INV_HAAR4( sp1, sp2, src[8], src[12],
399  dst[0], dst[4], dst[8], dst[12],
400  t0, t1, t2, t3, t4);
401  } else
402  dst[0] = dst[4] = dst[8] = dst[12] = 0;
403 
404  src++;
405  dst++;
406  }
407 #undef COMPENSATE
408 
409  /* apply the InvHaar8 to all rows */
410 #define COMPENSATE(x) (x)
411  src = tmp;
412  for (i = 0; i < 4; i++) {
413  if (!src[0] && !src[1] && !src[2] && !src[3]) {
414  memset(out, 0, 4 * sizeof(out[0]));
415  } else {
416  INV_HAAR4(src[0], src[1], src[2], src[3],
417  out[0], out[1], out[2], out[3],
418  t0, t1, t2, t3, t4);
419  }
420  src += 4;
421  out += pitch;
422  }
423 #undef COMPENSATE
424 }
425 
426 void ff_ivi_row_haar4(const int32_t *in, int16_t *out, uint32_t pitch,
427  const uint8_t *flags)
428 {
429  int i;
430  int t0, t1, t2, t3, t4;
431 
432  /* apply the InvHaar4 to all rows */
433 #define COMPENSATE(x) (x)
434  for (i = 0; i < 4; i++) {
435  if (!in[0] && !in[1] && !in[2] && !in[3]) {
436  memset(out, 0, 4 * sizeof(out[0]));
437  } else {
438  INV_HAAR4(in[0], in[1], in[2], in[3],
439  out[0], out[1], out[2], out[3],
440  t0, t1, t2, t3, t4);
441  }
442  in += 4;
443  out += pitch;
444  }
445 #undef COMPENSATE
446 }
447 
448 void ff_ivi_col_haar4(const int32_t *in, int16_t *out, uint32_t pitch,
449  const uint8_t *flags)
450 {
451  int i;
452  int t0, t1, t2, t3, t4;
453 
454  /* apply the InvHaar8 to all columns */
455 #define COMPENSATE(x) (x)
456  for (i = 0; i < 4; i++) {
457  if (flags[i]) {
458  INV_HAAR4(in[0], in[4], in[8], in[12],
459  out[0 * pitch], out[1 * pitch],
460  out[2 * pitch], out[3 * pitch],
461  t0, t1, t2, t3, t4);
462  } else
463  out[0 * pitch] = out[1 * pitch] =
464  out[2 * pitch] = out[3 * pitch] = 0;
465 
466  in++;
467  out++;
468  }
469 #undef COMPENSATE
470 }
471 
472 void ff_ivi_dc_haar_2d(const int32_t *in, int16_t *out, uint32_t pitch,
473  int blk_size)
474 {
475  int x, y;
476  int16_t dc_coeff;
477 
478  dc_coeff = (*in + 0) >> 3;
479 
480  for (y = 0; y < blk_size; out += pitch, y++) {
481  for (x = 0; x < blk_size; x++)
482  out[x] = dc_coeff;
483  }
484 }
485 
486 /** butterfly operation for the inverse slant transform */
487 #define IVI_SLANT_BFLY(s1, s2, o1, o2, t) \
488  t = (s1) - (s2);\
489  o1 = (s1) + (s2);\
490  o2 = (t);\
491 
492 /** This is a reflection a,b = 1/2, 5/4 for the inverse slant transform */
493 #define IVI_IREFLECT(s1, s2, o1, o2, t) \
494  t = (((s1) + (s2)*2 + 2) >> 2) + (s1);\
495  o2 = (((s1)*2 - (s2) + 2) >> 2) - (s2);\
496  o1 = (t);\
497 
498 /** This is a reflection a,b = 1/2, 7/8 for the inverse slant transform */
499 #define IVI_SLANT_PART4(s1, s2, o1, o2, t) \
500  t = (s2) + (((s1)*4 - (s2) + 4) >> 3);\
501  o2 = (s1) + ((-(s1) - (s2)*4 + 4) >> 3);\
502  o1 = (t);\
503 
504 /** inverse slant8 transform */
505 #define IVI_INV_SLANT8(s1, s4, s8, s5, s2, s6, s3, s7,\
506  d1, d2, d3, d4, d5, d6, d7, d8,\
507  t0, t1, t2, t3, t4, t5, t6, t7, t8) {\
508  IVI_SLANT_PART4(s4, s5, t4, t5, t0);\
509 \
510  IVI_SLANT_BFLY(s1, t5, t1, t5, t0); IVI_SLANT_BFLY(s2, s6, t2, t6, t0);\
511  IVI_SLANT_BFLY(s7, s3, t7, t3, t0); IVI_SLANT_BFLY(t4, s8, t4, t8, t0);\
512 \
513  IVI_SLANT_BFLY(t1, t2, t1, t2, t0); IVI_IREFLECT (t4, t3, t4, t3, t0);\
514  IVI_SLANT_BFLY(t5, t6, t5, t6, t0); IVI_IREFLECT (t8, t7, t8, t7, t0);\
515  IVI_SLANT_BFLY(t1, t4, t1, t4, t0); IVI_SLANT_BFLY(t2, t3, t2, t3, t0);\
516  IVI_SLANT_BFLY(t5, t8, t5, t8, t0); IVI_SLANT_BFLY(t6, t7, t6, t7, t0);\
517  d1 = COMPENSATE(t1);\
518  d2 = COMPENSATE(t2);\
519  d3 = COMPENSATE(t3);\
520  d4 = COMPENSATE(t4);\
521  d5 = COMPENSATE(t5);\
522  d6 = COMPENSATE(t6);\
523  d7 = COMPENSATE(t7);\
524  d8 = COMPENSATE(t8);}
525 
526 /** inverse slant4 transform */
527 #define IVI_INV_SLANT4(s1, s4, s2, s3, d1, d2, d3, d4, t0, t1, t2, t3, t4) {\
528  IVI_SLANT_BFLY(s1, s2, t1, t2, t0); IVI_IREFLECT (s4, s3, t4, t3, t0);\
529 \
530  IVI_SLANT_BFLY(t1, t4, t1, t4, t0); IVI_SLANT_BFLY(t2, t3, t2, t3, t0);\
531  d1 = COMPENSATE(t1);\
532  d2 = COMPENSATE(t2);\
533  d3 = COMPENSATE(t3);\
534  d4 = COMPENSATE(t4);}
535 
536 void ff_ivi_inverse_slant_8x8(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags)
537 {
538  int i;
539  const int32_t *src;
540  int32_t *dst;
541  int tmp[64];
542  int t0, t1, t2, t3, t4, t5, t6, t7, t8;
543 
544 #define COMPENSATE(x) (x)
545  src = in;
546  dst = tmp;
547  for (i = 0; i < 8; i++) {
548  if (flags[i]) {
549  IVI_INV_SLANT8(src[0], src[8], src[16], src[24], src[32], src[40], src[48], src[56],
550  dst[0], dst[8], dst[16], dst[24], dst[32], dst[40], dst[48], dst[56],
551  t0, t1, t2, t3, t4, t5, t6, t7, t8);
552  } else
553  dst[0] = dst[8] = dst[16] = dst[24] = dst[32] = dst[40] = dst[48] = dst[56] = 0;
554 
555  src++;
556  dst++;
557  }
558 #undef COMPENSATE
559 
560 #define COMPENSATE(x) (((x) + 1)>>1)
561  src = tmp;
562  for (i = 0; i < 8; i++) {
563  if (!src[0] && !src[1] && !src[2] && !src[3] && !src[4] && !src[5] && !src[6] && !src[7]) {
564  memset(out, 0, 8*sizeof(out[0]));
565  } else {
566  IVI_INV_SLANT8(src[0], src[1], src[2], src[3], src[4], src[5], src[6], src[7],
567  out[0], out[1], out[2], out[3], out[4], out[5], out[6], out[7],
568  t0, t1, t2, t3, t4, t5, t6, t7, t8);
569  }
570  src += 8;
571  out += pitch;
572  }
573 #undef COMPENSATE
574 }
575 
576 void ff_ivi_inverse_slant_4x4(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags)
577 {
578  int i;
579  const int32_t *src;
580  int32_t *dst;
581  int tmp[16];
582  int t0, t1, t2, t3, t4;
583 
584 #define COMPENSATE(x) (x)
585  src = in;
586  dst = tmp;
587  for (i = 0; i < 4; i++) {
588  if (flags[i]) {
589  IVI_INV_SLANT4(src[0], src[4], src[8], src[12],
590  dst[0], dst[4], dst[8], dst[12],
591  t0, t1, t2, t3, t4);
592  } else
593  dst[0] = dst[4] = dst[8] = dst[12] = 0;
594 
595  src++;
596  dst++;
597  }
598 #undef COMPENSATE
599 
600 #define COMPENSATE(x) (((x) + 1)>>1)
601  src = tmp;
602  for (i = 0; i < 4; i++) {
603  if (!src[0] && !src[1] && !src[2] && !src[3]) {
604  out[0] = out[1] = out[2] = out[3] = 0;
605  } else {
606  IVI_INV_SLANT4(src[0], src[1], src[2], src[3],
607  out[0], out[1], out[2], out[3],
608  t0, t1, t2, t3, t4);
609  }
610  src += 4;
611  out += pitch;
612  }
613 #undef COMPENSATE
614 }
615 
616 void ff_ivi_dc_slant_2d(const int32_t *in, int16_t *out, uint32_t pitch, int blk_size)
617 {
618  int x, y;
619  int16_t dc_coeff;
620 
621  dc_coeff = (*in + 1) >> 1;
622 
623  for (y = 0; y < blk_size; out += pitch, y++) {
624  for (x = 0; x < blk_size; x++)
625  out[x] = dc_coeff;
626  }
627 }
628 
629 void ff_ivi_row_slant8(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags)
630 {
631  int i;
632  int t0, t1, t2, t3, t4, t5, t6, t7, t8;
633 
634 #define COMPENSATE(x) (((x) + 1)>>1)
635  for (i = 0; i < 8; i++) {
636  if (!in[0] && !in[1] && !in[2] && !in[3] && !in[4] && !in[5] && !in[6] && !in[7]) {
637  memset(out, 0, 8*sizeof(out[0]));
638  } else {
639  IVI_INV_SLANT8( in[0], in[1], in[2], in[3], in[4], in[5], in[6], in[7],
640  out[0], out[1], out[2], out[3], out[4], out[5], out[6], out[7],
641  t0, t1, t2, t3, t4, t5, t6, t7, t8);
642  }
643  in += 8;
644  out += pitch;
645  }
646 #undef COMPENSATE
647 }
648 
649 void ff_ivi_dc_row_slant(const int32_t *in, int16_t *out, uint32_t pitch, int blk_size)
650 {
651  int x, y;
652  int16_t dc_coeff;
653 
654  dc_coeff = (*in + 1) >> 1;
655 
656  for (x = 0; x < blk_size; x++)
657  out[x] = dc_coeff;
658 
659  out += pitch;
660 
661  for (y = 1; y < blk_size; out += pitch, y++) {
662  for (x = 0; x < blk_size; x++)
663  out[x] = 0;
664  }
665 }
666 
667 void ff_ivi_col_slant8(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags)
668 {
669  int i, row2, row4, row8;
670  int t0, t1, t2, t3, t4, t5, t6, t7, t8;
671 
672  row2 = pitch << 1;
673  row4 = pitch << 2;
674  row8 = pitch << 3;
675 
676 #define COMPENSATE(x) (((x) + 1)>>1)
677  for (i = 0; i < 8; i++) {
678  if (flags[i]) {
679  IVI_INV_SLANT8(in[0], in[8], in[16], in[24], in[32], in[40], in[48], in[56],
680  out[0], out[pitch], out[row2], out[row2 + pitch], out[row4],
681  out[row4 + pitch], out[row4 + row2], out[row8 - pitch],
682  t0, t1, t2, t3, t4, t5, t6, t7, t8);
683  } else {
684  out[0] = out[pitch] = out[row2] = out[row2 + pitch] = out[row4] =
685  out[row4 + pitch] = out[row4 + row2] = out[row8 - pitch] = 0;
686  }
687 
688  in++;
689  out++;
690  }
691 #undef COMPENSATE
692 }
693 
694 void ff_ivi_dc_col_slant(const int32_t *in, int16_t *out, uint32_t pitch, int blk_size)
695 {
696  int x, y;
697  int16_t dc_coeff;
698 
699  dc_coeff = (*in + 1) >> 1;
700 
701  for (y = 0; y < blk_size; out += pitch, y++) {
702  out[0] = dc_coeff;
703  for (x = 1; x < blk_size; x++)
704  out[x] = 0;
705  }
706 }
707 
708 void ff_ivi_row_slant4(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags)
709 {
710  int i;
711  int t0, t1, t2, t3, t4;
712 
713 #define COMPENSATE(x) (((x) + 1)>>1)
714  for (i = 0; i < 4; i++) {
715  if (!in[0] && !in[1] && !in[2] && !in[3]) {
716  memset(out, 0, 4*sizeof(out[0]));
717  } else {
718  IVI_INV_SLANT4( in[0], in[1], in[2], in[3],
719  out[0], out[1], out[2], out[3],
720  t0, t1, t2, t3, t4);
721  }
722  in += 4;
723  out += pitch;
724  }
725 #undef COMPENSATE
726 }
727 
728 void ff_ivi_col_slant4(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags)
729 {
730  int i, row2;
731  int t0, t1, t2, t3, t4;
732 
733  row2 = pitch << 1;
734 
735 #define COMPENSATE(x) (((x) + 1)>>1)
736  for (i = 0; i < 4; i++) {
737  if (flags[i]) {
738  IVI_INV_SLANT4(in[0], in[4], in[8], in[12],
739  out[0], out[pitch], out[row2], out[row2 + pitch],
740  t0, t1, t2, t3, t4);
741  } else {
742  out[0] = out[pitch] = out[row2] = out[row2 + pitch] = 0;
743  }
744 
745  in++;
746  out++;
747  }
748 #undef COMPENSATE
749 }
750 
751 void ff_ivi_put_pixels_8x8(const int32_t *in, int16_t *out, uint32_t pitch,
752  const uint8_t *flags)
753 {
754  int x, y;
755 
756  for (y = 0; y < 8; out += pitch, in += 8, y++)
757  for (x = 0; x < 8; x++)
758  out[x] = in[x];
759 }
760 
761 void ff_ivi_put_dc_pixel_8x8(const int32_t *in, int16_t *out, uint32_t pitch,
762  int blk_size)
763 {
764  int y;
765 
766  out[0] = in[0];
767  memset(out + 1, 0, 7*sizeof(out[0]));
768  out += pitch;
769 
770  for (y = 1; y < 8; out += pitch, y++)
771  memset(out, 0, 8*sizeof(out[0]));
772 }
773 
774 #define IVI_MC_TEMPLATE(size, suffix, OP) \
775 static void ivi_mc_ ## size ##x## size ## suffix(int16_t *buf, \
776  uint32_t dpitch, \
777  const int16_t *ref_buf, \
778  uint32_t pitch, int mc_type) \
779 { \
780  int i, j; \
781  const int16_t *wptr; \
782 \
783  switch (mc_type) { \
784  case 0: /* fullpel (no interpolation) */ \
785  for (i = 0; i < size; i++, buf += dpitch, ref_buf += pitch) { \
786  for (j = 0; j < size; j++) {\
787  OP(buf[j], ref_buf[j]); \
788  } \
789  } \
790  break; \
791  case 1: /* horizontal halfpel interpolation */ \
792  for (i = 0; i < size; i++, buf += dpitch, ref_buf += pitch) \
793  for (j = 0; j < size; j++) \
794  OP(buf[j], (ref_buf[j] + ref_buf[j+1]) >> 1); \
795  break; \
796  case 2: /* vertical halfpel interpolation */ \
797  wptr = ref_buf + pitch; \
798  for (i = 0; i < size; i++, buf += dpitch, wptr += pitch, ref_buf += pitch) \
799  for (j = 0; j < size; j++) \
800  OP(buf[j], (ref_buf[j] + wptr[j]) >> 1); \
801  break; \
802  case 3: /* vertical and horizontal halfpel interpolation */ \
803  wptr = ref_buf + pitch; \
804  for (i = 0; i < size; i++, buf += dpitch, wptr += pitch, ref_buf += pitch) \
805  for (j = 0; j < size; j++) \
806  OP(buf[j], (ref_buf[j] + ref_buf[j+1] + wptr[j] + wptr[j+1]) >> 2); \
807  break; \
808  } \
809 } \
810 \
811 void ff_ivi_mc_ ## size ##x## size ## suffix(int16_t *buf, const int16_t *ref_buf, \
812  uint32_t pitch, int mc_type) \
813 { \
814  ivi_mc_ ## size ##x## size ## suffix(buf, pitch, ref_buf, pitch, mc_type); \
815 } \
816 
817 #define IVI_MC_AVG_TEMPLATE(size, suffix, OP) \
818 void ff_ivi_mc_avg_ ## size ##x## size ## suffix(int16_t *buf, \
819  const int16_t *ref_buf, \
820  const int16_t *ref_buf2, \
821  uint32_t pitch, \
822  int mc_type, int mc_type2) \
823 { \
824  int16_t tmp[size * size]; \
825  int i, j; \
826 \
827  ivi_mc_ ## size ##x## size ## _no_delta(tmp, size, ref_buf, pitch, mc_type); \
828  ivi_mc_ ## size ##x## size ## _delta(tmp, size, ref_buf2, pitch, mc_type2); \
829  for (i = 0; i < size; i++, buf += pitch) { \
830  for (j = 0; j < size; j++) {\
831  OP(buf[j], tmp[i * size + j] >> 1); \
832  } \
833  } \
834 } \
835 
836 #define OP_PUT(a, b) (a) = (b)
837 #define OP_ADD(a, b) (a) += (b)
838 
839 IVI_MC_TEMPLATE(8, _no_delta, OP_PUT)
840 IVI_MC_TEMPLATE(8, _delta, OP_ADD)
841 IVI_MC_TEMPLATE(4, _no_delta, OP_PUT)
842 IVI_MC_TEMPLATE(4, _delta, OP_ADD)
843 IVI_MC_AVG_TEMPLATE(8, _no_delta, OP_PUT)
844 IVI_MC_AVG_TEMPLATE(8, _delta, OP_ADD)
845 IVI_MC_AVG_TEMPLATE(4, _no_delta, OP_PUT)
846 IVI_MC_AVG_TEMPLATE(4, _delta, OP_ADD)