decodeframe.c 147 KB
Newer Older
Jingning Han's avatar
Jingning Han committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include <assert.h>
#include <stdlib.h>  // qsort()

#include "./vp10_rtcd.h"
#include "./vpx_dsp_rtcd.h"
#include "./vpx_scale_rtcd.h"

#include "vpx_dsp/bitreader_buffer.h"
#include "vpx_dsp/bitreader.h"
20
#include "vpx_dsp/vpx_dsp_common.h"
Jingning Han's avatar
Jingning Han committed
21
22
23
24
25
26
#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"
#include "vpx_ports/mem_ops.h"
#include "vpx_scale/vpx_scale.h"
#include "vpx_util/vpx_thread.h"

27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
#include "vp10/common/alloccommon.h"
#include "vp10/common/common.h"
#include "vp10/common/entropy.h"
#include "vp10/common/entropymode.h"
#include "vp10/common/idct.h"
#include "vp10/common/thread_common.h"
#include "vp10/common/pred_common.h"
#include "vp10/common/quant_common.h"
#include "vp10/common/reconintra.h"
#include "vp10/common/reconinter.h"
#include "vp10/common/seg_common.h"
#include "vp10/common/tile_common.h"

#include "vp10/decoder/decodeframe.h"
#include "vp10/decoder/detokenize.h"
#include "vp10/decoder/decodemv.h"
#include "vp10/decoder/decoder.h"
#include "vp10/decoder/dsubexp.h"
Jingning Han's avatar
Jingning Han committed
45
46
47

#define MAX_VP9_HEADER_SIZE 80

Yaowu Xu's avatar
Yaowu Xu committed
48
static int is_compound_reference_allowed(const VP10_COMMON *cm) {
Jingning Han's avatar
Jingning Han committed
49
  int i;
50
51
  if (frame_is_intra_only(cm))
    return 0;
Jingning Han's avatar
Jingning Han committed
52
53
54
55
56
57
58
  for (i = 1; i < REFS_PER_FRAME; ++i)
    if (cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1])
      return 1;

  return 0;
}

Yaowu Xu's avatar
Yaowu Xu committed
59
static void setup_compound_reference_mode(VP10_COMMON *cm) {
Jingning Han's avatar
Jingning Han committed
60
61
62
63
  if (cm->ref_frame_sign_bias[LAST_FRAME] ==
          cm->ref_frame_sign_bias[GOLDEN_FRAME]) {
    cm->comp_fixed_ref = ALTREF_FRAME;
    cm->comp_var_ref[0] = LAST_FRAME;
64
65
66
67
68
69
#if CONFIG_EXT_REFS
    cm->comp_var_ref[1] = LAST2_FRAME;
    cm->comp_var_ref[2] = LAST3_FRAME;
    cm->comp_var_ref[3] = LAST4_FRAME;
    cm->comp_var_ref[4] = GOLDEN_FRAME;
#else
Jingning Han's avatar
Jingning Han committed
70
    cm->comp_var_ref[1] = GOLDEN_FRAME;
71
#endif  // CONFIG_EXT_REFS
Jingning Han's avatar
Jingning Han committed
72
73
  } else if (cm->ref_frame_sign_bias[LAST_FRAME] ==
                 cm->ref_frame_sign_bias[ALTREF_FRAME]) {
74
75
76
#if CONFIG_EXT_REFS
    assert(0);
#endif  // CONFIG_EXT_REFS
Jingning Han's avatar
Jingning Han committed
77
78
79
80
    cm->comp_fixed_ref = GOLDEN_FRAME;
    cm->comp_var_ref[0] = LAST_FRAME;
    cm->comp_var_ref[1] = ALTREF_FRAME;
  } else {
81
82
83
#if CONFIG_EXT_REFS
    assert(0);
#endif  // CONFIG_EXT_REFS
Jingning Han's avatar
Jingning Han committed
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
    cm->comp_fixed_ref = LAST_FRAME;
    cm->comp_var_ref[0] = GOLDEN_FRAME;
    cm->comp_var_ref[1] = ALTREF_FRAME;
  }
}

static int read_is_valid(const uint8_t *start, size_t len, const uint8_t *end) {
  return len != 0 && len <= (size_t)(end - start);
}

static int decode_unsigned_max(struct vpx_read_bit_buffer *rb, int max) {
  const int data = vpx_rb_read_literal(rb, get_unsigned_bits(max));
  return data > max ? max : data;
}

99
100
101
static TX_MODE read_tx_mode(struct vpx_read_bit_buffer *rb) {
  return vpx_rb_read_bit(rb) ? TX_MODE_SELECT : vpx_rb_read_literal(rb, 2);
}
Jingning Han's avatar
Jingning Han committed
102
103
104
105
106
107
108
109
110

static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vpx_reader *r) {
  int i, j;
  for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j)
    for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i)
      vp10_diff_update_prob(r, &fc->switchable_interp_prob[j][i]);
}

static void read_inter_mode_probs(FRAME_CONTEXT *fc, vpx_reader *r) {
111
112
113
114
115
116
117
118
  int i;
#if CONFIG_REF_MV
  for (i = 0; i < NEWMV_MODE_CONTEXTS; ++i)
    vp10_diff_update_prob(r, &fc->newmv_prob[i]);
  for (i = 0; i < ZEROMV_MODE_CONTEXTS; ++i)
    vp10_diff_update_prob(r, &fc->zeromv_prob[i]);
  for (i = 0; i < REFMV_MODE_CONTEXTS; ++i)
    vp10_diff_update_prob(r, &fc->refmv_prob[i]);
119
120
121
122
  for (i = 0; i < DRL_MODE_CONTEXTS; ++i)
    vp10_diff_update_prob(r, &fc->drl_prob0[i]);
  for (i = 0; i < DRL_MODE_CONTEXTS; ++i)
    vp10_diff_update_prob(r, &fc->drl_prob1[i]);
Yue Chen's avatar
Yue Chen committed
123
124
125
#if CONFIG_EXT_INTER
  vp10_diff_update_prob(r, &fc->new2mv_prob);
#endif  // CONFIG_EXT_INTER
126
127
#else
  int j;
Jingning Han's avatar
Jingning Han committed
128
129
130
  for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
    for (j = 0; j < INTER_MODES - 1; ++j)
      vp10_diff_update_prob(r, &fc->inter_mode_probs[i][j]);
131
#endif
Jingning Han's avatar
Jingning Han committed
132
133
}

134
135
136
137
138
139
140
141
142
143
144
145
146
#if CONFIG_EXT_INTER
static void read_inter_compound_mode_probs(FRAME_CONTEXT *fc, vpx_reader *r) {
  int i, j;
  if (vpx_read(r, GROUP_DIFF_UPDATE_PROB)) {
    for (j = 0; j < INTER_MODE_CONTEXTS; ++j) {
      for (i = 0; i < INTER_COMPOUND_MODES - 1; ++i) {
        vp10_diff_update_prob(r, &fc->inter_compound_mode_probs[j][i]);
      }
    }
  }
}
#endif  // CONFIG_EXT_INTER

147
148
149
150
151
152
153
154
155
156
static REFERENCE_MODE read_frame_reference_mode(const VP10_COMMON *cm,
    struct vpx_read_bit_buffer *rb) {
  if (is_compound_reference_allowed(cm)) {
    return vpx_rb_read_bit(rb) ? REFERENCE_MODE_SELECT
                               : (vpx_rb_read_bit(rb) ? COMPOUND_REFERENCE
                                                      : SINGLE_REFERENCE);
  } else {
    return SINGLE_REFERENCE;
  }
}
Jingning Han's avatar
Jingning Han committed
157

Yaowu Xu's avatar
Yaowu Xu committed
158
static void read_frame_reference_mode_probs(VP10_COMMON *cm, vpx_reader *r) {
Jingning Han's avatar
Jingning Han committed
159
  FRAME_CONTEXT *const fc = cm->fc;
160
  int i, j;
Jingning Han's avatar
Jingning Han committed
161
162
163
164
165

  if (cm->reference_mode == REFERENCE_MODE_SELECT)
    for (i = 0; i < COMP_INTER_CONTEXTS; ++i)
      vp10_diff_update_prob(r, &fc->comp_inter_prob[i]);

166
  if (cm->reference_mode != COMPOUND_REFERENCE) {
Jingning Han's avatar
Jingning Han committed
167
    for (i = 0; i < REF_CONTEXTS; ++i) {
168
169
170
      for (j = 0; j < (SINGLE_REFS - 1); ++j) {
        vp10_diff_update_prob(r, &fc->single_ref_prob[i][j]);
      }
Jingning Han's avatar
Jingning Han committed
171
    }
172
  }
Jingning Han's avatar
Jingning Han committed
173

174
175
176
177
178
179
180
  if (cm->reference_mode != SINGLE_REFERENCE) {
    for (i = 0; i < REF_CONTEXTS; ++i) {
      for (j = 0; j < (COMP_REFS - 1); ++j) {
        vp10_diff_update_prob(r, &fc->comp_ref_prob[i][j]);
      }
    }
  }
Jingning Han's avatar
Jingning Han committed
181
182
183
184
185
}

static void update_mv_probs(vpx_prob *p, int n, vpx_reader *r) {
  int i;
  for (i = 0; i < n; ++i)
186
    vp10_diff_update_prob(r, &p[i]);
Jingning Han's avatar
Jingning Han committed
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
}

static void read_mv_probs(nmv_context *ctx, int allow_hp, vpx_reader *r) {
  int i, j;

  update_mv_probs(ctx->joints, MV_JOINTS - 1, r);

  for (i = 0; i < 2; ++i) {
    nmv_component *const comp_ctx = &ctx->comps[i];
    update_mv_probs(&comp_ctx->sign, 1, r);
    update_mv_probs(comp_ctx->classes, MV_CLASSES - 1, r);
    update_mv_probs(comp_ctx->class0, CLASS0_SIZE - 1, r);
    update_mv_probs(comp_ctx->bits, MV_OFFSET_BITS, r);
  }

  for (i = 0; i < 2; ++i) {
    nmv_component *const comp_ctx = &ctx->comps[i];
    for (j = 0; j < CLASS0_SIZE; ++j)
      update_mv_probs(comp_ctx->class0_fp[j], MV_FP_SIZE - 1, r);
    update_mv_probs(comp_ctx->fp, 3, r);
  }

  if (allow_hp) {
    for (i = 0; i < 2; ++i) {
      nmv_component *const comp_ctx = &ctx->comps[i];
      update_mv_probs(&comp_ctx->class0_hp, 1, r);
      update_mv_probs(&comp_ctx->hp, 1, r);
    }
  }
}

218
219
220
221
222
static void inverse_transform_block(MACROBLOCKD* xd, int plane,
                                    const TX_TYPE tx_type,
                                    const TX_SIZE tx_size,
                                    uint8_t *dst, int stride,
                                    int eob) {
Jingning Han's avatar
Jingning Han committed
223
  struct macroblockd_plane *const pd = &xd->plane[plane];
224
  const int seg_id = xd->mi[0]->mbmi.segment_id;
Jingning Han's avatar
Jingning Han committed
225
226
  if (eob > 0) {
    tran_low_t *const dqcoeff = pd->dqcoeff;
Angie Chiang's avatar
Angie Chiang committed
227
228
229
230
231
232
    INV_TXFM_PARAM inv_txfm_param;
    inv_txfm_param.tx_type = tx_type;
    inv_txfm_param.tx_size = tx_size;
    inv_txfm_param.eob = eob;
    inv_txfm_param.lossless = xd->lossless[seg_id];

Jingning Han's avatar
Jingning Han committed
233
234
#if CONFIG_VP9_HIGHBITDEPTH
    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
Angie Chiang's avatar
Angie Chiang committed
235
236
      inv_txfm_param.bd = xd->bd;
      highbd_inv_txfm_add(dqcoeff, dst, stride, &inv_txfm_param);
Jingning Han's avatar
Jingning Han committed
237
    } else {
238
#endif  // CONFIG_VP9_HIGHBITDEPTH
Angie Chiang's avatar
Angie Chiang committed
239
      inv_txfm_add(dqcoeff, dst, stride, &inv_txfm_param);
hui su's avatar
hui su committed
240
#if CONFIG_VP9_HIGHBITDEPTH
Jingning Han's avatar
Jingning Han committed
241
242
243
244
245
246
    }
#endif  // CONFIG_VP9_HIGHBITDEPTH

    if (eob == 1) {
      dqcoeff[0] = 0;
    } else {
247
      if (tx_type == DCT_DCT && tx_size <= TX_16X16 && eob <= 10)
Jingning Han's avatar
Jingning Han committed
248
        memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0]));
249
250
251
252
#if CONFIG_EXT_TX
      else
        memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0]));
#else
Jingning Han's avatar
Jingning Han committed
253
254
255
256
      else if (tx_size == TX_32X32 && eob <= 34)
        memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0]));
      else
        memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0]));
257
#endif
Jingning Han's avatar
Jingning Han committed
258
259
260
261
262
    }
  }
}

static void predict_and_reconstruct_intra_block(MACROBLOCKD *const xd,
Alex Converse's avatar
Alex Converse committed
263
264
265
266
#if CONFIG_ANS
                                         const rans_dec_lut *const token_tab,
                                                struct AnsDecoder *const r,
#else
Jingning Han's avatar
Jingning Han committed
267
                                                vpx_reader *r,
Alex Converse's avatar
Alex Converse committed
268
#endif  // CONFIG_ANS
Jingning Han's avatar
Jingning Han committed
269
270
271
272
273
274
                                                MB_MODE_INFO *const mbmi,
                                                int plane,
                                                int row, int col,
                                                TX_SIZE tx_size) {
  struct macroblockd_plane *const pd = &xd->plane[plane];
  PREDICTION_MODE mode = (plane == 0) ? mbmi->mode : mbmi->uv_mode;
hui su's avatar
hui su committed
275
  PLANE_TYPE plane_type = (plane == 0) ? PLANE_TYPE_Y : PLANE_TYPE_UV;
Jingning Han's avatar
Jingning Han committed
276
  uint8_t *dst;
hui su's avatar
hui su committed
277
  int block_idx = (row << 1) + col;
Jingning Han's avatar
Jingning Han committed
278
279
280
281
282
283
  dst = &pd->dst.buf[4 * row * pd->dst.stride + 4 * col];

  if (mbmi->sb_type < BLOCK_8X8)
    if (plane == 0)
      mode = xd->mi[0]->bmi[(row << 1) + col].as_mode;

284
  vp10_predict_intra_block(xd, pd->n4_wl, pd->n4_hl, tx_size, mode,
Jingning Han's avatar
Jingning Han committed
285
286
287
288
                          dst, pd->dst.stride, dst, pd->dst.stride,
                          col, row, plane);

  if (!mbmi->skip) {
hui su's avatar
hui su committed
289
    TX_TYPE tx_type = get_tx_type(plane_type, xd, block_idx, tx_size);
290
    const scan_order *sc = get_scan(tx_size, tx_type, 0);
Alex Converse's avatar
Alex Converse committed
291
292
293
294
295
    const int eob = vp10_decode_block_tokens(xd,
#if CONFIG_ANS
                                             token_tab,
#endif  // CONFIG_ANS
                                             plane, sc, col, row, tx_size,
hui su's avatar
hui su committed
296
                                             r, mbmi->segment_id);
297
298
    inverse_transform_block(xd, plane, tx_type, tx_size,
                            dst, pd->dst.stride, eob);
Jingning Han's avatar
Jingning Han committed
299
300
301
  }
}

302
303
304
305
306
307
308
#if CONFIG_VAR_TX
static void decode_reconstruct_tx(MACROBLOCKD *const xd, vpx_reader *r,
                                  MB_MODE_INFO *const mbmi,
                                  int plane, BLOCK_SIZE plane_bsize,
                                  int block, int blk_row, int blk_col,
                                  TX_SIZE tx_size, int *eob_total) {
  const struct macroblockd_plane *const pd = &xd->plane[plane];
309
  const BLOCK_SIZE bsize = txsize_to_bsize[tx_size];
310
311
  int tx_idx = (blk_row >> (1 - pd->subsampling_y)) * 8 +
               (blk_col >> (1 - pd->subsampling_x));
312
  TX_SIZE plane_tx_size = plane ?
313
      get_uv_tx_size_impl(mbmi->inter_tx_size[tx_idx], bsize, 0, 0) :
314
      mbmi->inter_tx_size[tx_idx];
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
  int max_blocks_high = num_4x4_blocks_high_lookup[plane_bsize];
  int max_blocks_wide = num_4x4_blocks_wide_lookup[plane_bsize];

  if (xd->mb_to_bottom_edge < 0)
    max_blocks_high += xd->mb_to_bottom_edge >> (5 + pd->subsampling_y);
  if (xd->mb_to_right_edge < 0)
    max_blocks_wide += xd->mb_to_right_edge >> (5 + pd->subsampling_x);

  if (blk_row >= max_blocks_high || blk_col >= max_blocks_wide)
    return;

  if (tx_size == plane_tx_size) {
    PLANE_TYPE plane_type = (plane == 0) ? PLANE_TYPE_Y : PLANE_TYPE_UV;
    TX_TYPE tx_type = get_tx_type(plane_type, xd, block, tx_size);
    const scan_order *sc = get_scan(tx_size, tx_type, 1);
    const int eob = vp10_decode_block_tokens(xd, plane, sc,
                                             blk_col, blk_row, tx_size,
                                             r, mbmi->segment_id);
333
    inverse_transform_block(xd, plane, tx_type, tx_size,
334
        &pd->dst.buf[4 * blk_row * pd->dst.stride + 4 * blk_col],
335
        pd->dst.stride, eob);
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
    *eob_total += eob;
  } else {
    int bsl = b_width_log2_lookup[bsize];
    int i;

    assert(bsl > 0);
    --bsl;

    for (i = 0; i < 4; ++i) {
      const int offsetr = blk_row + ((i >> 1) << bsl);
      const int offsetc = blk_col + ((i & 0x01) << bsl);
      int step = 1 << (2 * (tx_size - 1));

      if (offsetr >= max_blocks_high || offsetc >= max_blocks_wide)
        continue;

      decode_reconstruct_tx(xd, r, mbmi, plane, plane_bsize, block + i * step,
                            offsetr, offsetc, tx_size - 1, eob_total);
    }
  }
}
357
#endif  // CONFIG_VAR_TX
358

359
#if !CONFIG_VAR_TX || CONFIG_SUPERTX
Alex Converse's avatar
Alex Converse committed
360
361
362
363
364
365
366
static int reconstruct_inter_block(MACROBLOCKD *const xd,
#if CONFIG_ANS
                                   const rans_dec_lut *const token_tab,
                                   struct AnsDecoder *const r,
#else
                                   vpx_reader *r,
#endif
Jingning Han's avatar
Jingning Han committed
367
368
369
                                   MB_MODE_INFO *const mbmi, int plane,
                                   int row, int col, TX_SIZE tx_size) {
  struct macroblockd_plane *const pd = &xd->plane[plane];
hui su's avatar
hui su committed
370
371
  PLANE_TYPE plane_type = (plane == 0) ? PLANE_TYPE_Y : PLANE_TYPE_UV;
  int block_idx = (row << 1) + col;
hui su's avatar
hui su committed
372
  TX_TYPE tx_type = get_tx_type(plane_type, xd, block_idx, tx_size);
373
  const scan_order *sc = get_scan(tx_size, tx_type, 1);
Alex Converse's avatar
Alex Converse committed
374
375
376
377
378
379
  const int eob = vp10_decode_block_tokens(xd,
#if CONFIG_ANS
                                           token_tab,
#endif
                                           plane, sc, col, row, tx_size, r,
                                           mbmi->segment_id);
Jingning Han's avatar
Jingning Han committed
380

381
382
383
  inverse_transform_block(xd, plane, tx_type, tx_size,
                          &pd->dst.buf[4 * row * pd->dst.stride + 4 * col],
                          pd->dst.stride, eob);
Jingning Han's avatar
Jingning Han committed
384
385
  return eob;
}
386
#endif  // !CONFIG_VAR_TX || CONFIG_SUPER_TX
Jingning Han's avatar
Jingning Han committed
387

388
#if (CONFIG_SUPERTX || CONFIG_OBMC)
Jingning Han's avatar
Jingning Han committed
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
static void build_mc_border(const uint8_t *src, int src_stride,
                            uint8_t *dst, int dst_stride,
                            int x, int y, int b_w, int b_h, int w, int h) {
  // Get a pointer to the start of the real data for this row.
  const uint8_t *ref_row = src - x - y * src_stride;

  if (y >= h)
    ref_row += (h - 1) * src_stride;
  else if (y > 0)
    ref_row += y * src_stride;

  do {
    int right = 0, copy;
    int left = x < 0 ? -x : 0;

    if (left > b_w)
      left = b_w;

    if (x + b_w > w)
      right = x + b_w - w;

    if (right > b_w)
      right = b_w;

    copy = b_w - left - right;

    if (left)
      memset(dst, ref_row[0], left);

    if (copy)
      memcpy(dst + left, ref_row + x + left, copy);

    if (right)
      memset(dst + left + copy, ref_row[w - 1], right);

    dst += dst_stride;
    ++y;

    if (y > 0 && y < h)
      ref_row += src_stride;
  } while (--b_h);
}

#if CONFIG_VP9_HIGHBITDEPTH
433
434
435
436
static void build_mc_border_highbd(const uint8_t *src8, int src_stride,
                                   uint16_t *dst, int dst_stride,
                                   int x, int y, int b_w, int b_h,
                                   int w, int h) {
Jingning Han's avatar
Jingning Han committed
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
  // Get a pointer to the start of the real data for this row.
  const uint16_t *src = CONVERT_TO_SHORTPTR(src8);
  const uint16_t *ref_row = src - x - y * src_stride;

  if (y >= h)
    ref_row += (h - 1) * src_stride;
  else if (y > 0)
    ref_row += y * src_stride;

  do {
    int right = 0, copy;
    int left = x < 0 ? -x : 0;

    if (left > b_w)
      left = b_w;

    if (x + b_w > w)
      right = x + b_w - w;

    if (right > b_w)
      right = b_w;

    copy = b_w - left - right;

    if (left)
      vpx_memset16(dst, ref_row[0], left);

    if (copy)
      memcpy(dst + left, ref_row + x + left, copy * sizeof(uint16_t));

    if (right)
      vpx_memset16(dst + left + copy, ref_row[w - 1], right);

    dst += dst_stride;
    ++y;

    if (y > 0 && y < h)
      ref_row += src_stride;
  } while (--b_h);
}

478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
static void extend_and_predict_highbd(const uint8_t *buf_ptr1,
                                      int pre_buf_stride,
                                      int x0, int y0, int b_w, int b_h,
                                      int frame_width, int frame_height,
                                      int border_offset,
                                      uint8_t *const dst, int dst_buf_stride,
                                      int subpel_x, int subpel_y,
                                      const INTERP_FILTER interp_filter,
                                      const struct scale_factors *sf,
#if CONFIG_EXT_INTER && CONFIG_SUPERTX
                                      int plane,
                                      int wedge_offset_x, int wedge_offset_y,
#endif  // CONFIG_EXT_INTER && CONFIG_SUPERTX
                                      MACROBLOCKD *xd,
                                      int w, int h, int ref, int xs, int ys) {
  DECLARE_ALIGNED(16, uint16_t,
                  mc_buf_high[(CU_SIZE + 16) * 2 * (CU_SIZE + 16) * 2]);
Jingning Han's avatar
Jingning Han committed
495
496
497
  const uint8_t *buf_ptr;

  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
498
499
    build_mc_border_highbd(buf_ptr1, pre_buf_stride, mc_buf_high, b_w,
                           x0, y0, b_w, b_h, frame_width, frame_height);
Jingning Han's avatar
Jingning Han committed
500
501
502
503
504
505
    buf_ptr = CONVERT_TO_BYTEPTR(mc_buf_high) + border_offset;
  } else {
    build_mc_border(buf_ptr1, pre_buf_stride, (uint8_t *)mc_buf_high, b_w,
                    x0, y0, b_w, b_h, frame_width, frame_height);
    buf_ptr = ((uint8_t *)mc_buf_high) + border_offset;
  }
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
#if CONFIG_EXT_INTER
  if (ref && get_wedge_bits(xd->mi[0]->mbmi.sb_type) &&
      xd->mi[0]->mbmi.use_wedge_interinter)
    vp10_make_masked_inter_predictor(
        buf_ptr, b_w, dst, dst_buf_stride,
        subpel_x, subpel_y, sf, w, h,
        interp_filter, xs, ys,
#if CONFIG_SUPERTX
        plane, wedge_offset_x, wedge_offset_y,
#endif  // CONFIG_SUPERTX
        xd);
  else
#endif  // CONFIG_EXT_INTER
    vp10_make_inter_predictor(buf_ptr, b_w, dst, dst_buf_stride,
                              subpel_x, subpel_y, sf, w, h, ref,
                              interp_filter, xs, ys, xd);
Jingning Han's avatar
Jingning Han committed
522
}
523

Jingning Han's avatar
Jingning Han committed
524
#else
525

Jingning Han's avatar
Jingning Han committed
526
527
528
529
530
531
static void extend_and_predict(const uint8_t *buf_ptr1, int pre_buf_stride,
                               int x0, int y0, int b_w, int b_h,
                               int frame_width, int frame_height,
                               int border_offset,
                               uint8_t *const dst, int dst_buf_stride,
                               int subpel_x, int subpel_y,
532
                               const INTERP_FILTER interp_filter,
Jingning Han's avatar
Jingning Han committed
533
                               const struct scale_factors *sf,
534
535
536
537
538
#if CONFIG_EXT_INTER && CONFIG_SUPERTX
                               int plane,
                               int wedge_offset_x, int wedge_offset_y,
#endif  // CONFIG_EXT_INTER && CONFIG_SUPERTX
                               MACROBLOCKD *xd,
Jingning Han's avatar
Jingning Han committed
539
                               int w, int h, int ref, int xs, int ys) {
540
  DECLARE_ALIGNED(16, uint8_t, mc_buf[(CU_SIZE + 16) * 2 * (CU_SIZE + 16) * 2]);
Jingning Han's avatar
Jingning Han committed
541
542
543
544
545
  const uint8_t *buf_ptr;

  build_mc_border(buf_ptr1, pre_buf_stride, mc_buf, b_w,
                  x0, y0, b_w, b_h, frame_width, frame_height);
  buf_ptr = mc_buf + border_offset;
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
#if CONFIG_EXT_INTER
  if (ref && get_wedge_bits(xd->mi[0]->mbmi.sb_type) &&
      xd->mi[0]->mbmi.use_wedge_interinter)
    vp10_make_masked_inter_predictor(
        buf_ptr, b_w, dst, dst_buf_stride,
        subpel_x, subpel_y, sf, w, h,
        interp_filter, xs, ys,
#if CONFIG_SUPERTX
        plane, wedge_offset_x, wedge_offset_y,
#endif  // CONFIG_SUPERTX
        xd);
  else
#endif  // CONFIG_EXT_INTER
    vp10_make_inter_predictor(buf_ptr, b_w, dst, dst_buf_stride,
                              subpel_x, subpel_y, sf, w, h, ref,
                              interp_filter, xs, ys, xd);
Jingning Han's avatar
Jingning Han committed
562
563
}
#endif  // CONFIG_VP9_HIGHBITDEPTH
564
565
566
567
568
569
570
571
572
573
574
575

static void dec_build_inter_predictors(VP10Decoder *const pbi,
                                       MACROBLOCKD *xd, int plane,
#if CONFIG_OBMC
                                       int mi_col_offset, int mi_row_offset,
#endif  // CONFIG_OBMC
                                       int bw, int bh,
                                       int x, int y, int w, int h,
#if CONFIG_EXT_INTER && CONFIG_SUPERTX
                                       int wedge_offset_x, int wedge_offset_y,
#endif  // CONFIG_EXT_INTER && CONFIG_SUPERTX
                                       int mi_x, int mi_y,
576
                                       const INTERP_FILTER interp_filter,
Jingning Han's avatar
Jingning Han committed
577
578
579
580
581
                                       const struct scale_factors *sf,
                                       struct buf_2d *pre_buf,
                                       struct buf_2d *dst_buf, const MV* mv,
                                       RefCntBuffer *ref_frame_buf,
                                       int is_scaled, int ref) {
582
  VP10_COMMON *const cm = &pbi->common;
Jingning Han's avatar
Jingning Han committed
583
584
585
  struct macroblockd_plane *const pd = &xd->plane[plane];
  uint8_t *const dst = dst_buf->buf + dst_buf->stride * y + x;
  MV32 scaled_mv;
586
  MV mv_q4;
Jingning Han's avatar
Jingning Han committed
587
588
589
  int xs, ys, x0, y0, x0_16, y0_16, frame_width, frame_height,
      buf_stride, subpel_x, subpel_y;
  uint8_t *ref_frame, *buf_ptr;
590
591
592
593
594
595
596
#if CONFIG_EXT_INTER
#if CONFIG_OBMC
  const MODE_INFO *mi = xd->mi[mi_col_offset + xd->mi_stride * mi_row_offset];
#else
  const MODE_INFO *mi = xd->mi[0];
#endif  // CONFIG_OBMC
#endif  // CONFIG_EXT_INTER
597
#if CONFIG_EXT_INTERP
598
  const int i_filter = IsInterpolatingFilter(interp_filter);
599
#endif  // CONFIG_EXT_INTERP
600
601
602
603
#if CONFIG_OBMC
  (void) mi_col_offset;
  (void) mi_row_offset;
#endif  // CONFIG_OBMC
Jingning Han's avatar
Jingning Han committed
604
605
606
607
608
609
610
611
612
613
614
615
616

  // Get reference frame pointer, width and height.
  if (plane == 0) {
    frame_width = ref_frame_buf->buf.y_crop_width;
    frame_height = ref_frame_buf->buf.y_crop_height;
    ref_frame = ref_frame_buf->buf.y_buffer;
  } else {
    frame_width = ref_frame_buf->buf.uv_crop_width;
    frame_height = ref_frame_buf->buf.uv_crop_height;
    ref_frame = plane == 1 ? ref_frame_buf->buf.u_buffer
                         : ref_frame_buf->buf.v_buffer;
  }

617
618
619
  mv_q4 = clamp_mv_to_umv_border_sb(xd, mv, bw, bh,
                                    pd->subsampling_x,
                                    pd->subsampling_y);
Jingning Han's avatar
Jingning Han committed
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
  if (is_scaled) {
    // Co-ordinate of containing block to pixel precision.
    int x_start = (-xd->mb_to_left_edge >> (3 + pd->subsampling_x));
    int y_start = (-xd->mb_to_top_edge >> (3 + pd->subsampling_y));

    // Co-ordinate of the block to 1/16th pixel precision.
    x0_16 = (x_start + x) << SUBPEL_BITS;
    y0_16 = (y_start + y) << SUBPEL_BITS;

    // Co-ordinate of current block in reference frame
    // to 1/16th pixel precision.
    x0_16 = sf->scale_value_x(x0_16, sf);
    y0_16 = sf->scale_value_y(y0_16, sf);

    // Map the top left corner of the block into the reference frame.
    x0 = sf->scale_value_x(x_start + x, sf);
    y0 = sf->scale_value_y(y_start + y, sf);

    // Scale the MV and incorporate the sub-pixel offset of the block
    // in the reference frame.
    scaled_mv = vp10_scale_mv(&mv_q4, mi_x + x, mi_y + y, sf);
    xs = sf->x_step_q4;
    ys = sf->y_step_q4;
  } else {
    // Co-ordinate of containing block to pixel precision.
    x0 = (-xd->mb_to_left_edge >> (3 + pd->subsampling_x)) + x;
    y0 = (-xd->mb_to_top_edge >> (3 + pd->subsampling_y)) + y;

    // Co-ordinate of the block to 1/16th pixel precision.
    x0_16 = x0 << SUBPEL_BITS;
    y0_16 = y0 << SUBPEL_BITS;

652
653
    scaled_mv.row = mv_q4.row;
    scaled_mv.col = mv_q4.col;
Jingning Han's avatar
Jingning Han committed
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
    xs = ys = 16;
  }
  subpel_x = scaled_mv.col & SUBPEL_MASK;
  subpel_y = scaled_mv.row & SUBPEL_MASK;

  // Calculate the top left corner of the best matching block in the
  // reference frame.
  x0 += scaled_mv.col >> SUBPEL_BITS;
  y0 += scaled_mv.row >> SUBPEL_BITS;
  x0_16 += scaled_mv.col;
  y0_16 += scaled_mv.row;

  // Get reference block pointer.
  buf_ptr = ref_frame + y0 * pre_buf->stride + x0;
  buf_stride = pre_buf->stride;

  // Do border extension if there is motion or the
  // width/height is not a multiple of 8 pixels.
  if (is_scaled || scaled_mv.col || scaled_mv.row ||
673
674
675
#if CONFIG_EXT_INTERP
      !i_filter ||
#endif
Jingning Han's avatar
Jingning Han committed
676
677
678
679
680
681
682
      (frame_width & 0x7) || (frame_height & 0x7)) {
    int y1 = ((y0_16 + (h - 1) * ys) >> SUBPEL_BITS) + 1;

    // Get reference block bottom right horizontal coordinate.
    int x1 = ((x0_16 + (w - 1) * xs) >> SUBPEL_BITS) + 1;
    int x_pad = 0, y_pad = 0;

683
684
    InterpFilterParams filter_params =
        vp10_get_interp_filter_params(interp_filter);
685
    int filter_size = filter_params.taps;
686

687
688
689
690
691
    if (subpel_x ||
#if CONFIG_EXT_INTERP
        !i_filter ||
#endif
        (sf->x_step_q4 != SUBPEL_SHIFTS)) {
692
693
      x0 -= filter_size / 2 - 1;
      x1 += filter_size / 2;
Jingning Han's avatar
Jingning Han committed
694
695
696
      x_pad = 1;
    }

697
698
699
700
701
    if (subpel_y ||
#if CONFIG_EXT_INTERP
        !i_filter ||
#endif
        (sf->y_step_q4 != SUBPEL_SHIFTS)) {
702
703
      y0 -= filter_size / 2 - 1;
      y1 += filter_size / 2;
Jingning Han's avatar
Jingning Han committed
704
705
706
707
708
      y_pad = 1;
    }

    // Wait until reference block is ready. Pad 7 more pixels as last 7
    // pixels of each superblock row can be changed by next superblock row.
709
    if (cm->frame_parallel_decode)
Jingning Han's avatar
Jingning Han committed
710
      vp10_frameworker_wait(pbi->frame_worker_owner, ref_frame_buf,
711
                            VPXMAX(0, (y1 + 7)) << (plane == 0 ? 0 : 1));
Jingning Han's avatar
Jingning Han committed
712
713
714
715
716
717
718
719

    // Skip border extension if block is inside the frame.
    if (x0 < 0 || x0 > frame_width - 1 || x1 < 0 || x1 > frame_width - 1 ||
        y0 < 0 || y0 > frame_height - 1 || y1 < 0 || y1 > frame_height - 1) {
      // Extend the border.
      const uint8_t *const buf_ptr1 = ref_frame + y0 * buf_stride + x0;
      const int b_w = x1 - x0 + 1;
      const int b_h = y1 - y0 + 1;
720
721
      const int border_offset = y_pad * (filter_size / 2 - 1) * b_w +
                                x_pad * (filter_size / 2 - 1);
Jingning Han's avatar
Jingning Han committed
722

723
724
725
726
727
728
729
730
731
732
733
#if CONFIG_VP9_HIGHBITDEPTH
      extend_and_predict_highbd(buf_ptr1, buf_stride, x0, y0, b_w, b_h,
                                frame_width, frame_height, border_offset,
                                dst, dst_buf->stride,
                                subpel_x, subpel_y,
                                interp_filter, sf,
#if CONFIG_EXT_INTER && CONFIG_SUPERTX
                                plane, wedge_offset_x, wedge_offset_y,
#endif  // CONFIG_EXT_INTER && CONFIG_SUPERTX
                                xd, w, h, ref, xs, ys);
#else
Jingning Han's avatar
Jingning Han committed
734
735
736
737
      extend_and_predict(buf_ptr1, buf_stride, x0, y0, b_w, b_h,
                         frame_width, frame_height, border_offset,
                         dst, dst_buf->stride,
                         subpel_x, subpel_y,
738
                         interp_filter, sf,
739
740
741
742
743
#if CONFIG_EXT_INTER && CONFIG_SUPERTX
                         plane, wedge_offset_x, wedge_offset_y,
#endif  // CONFIG_EXT_INTER && CONFIG_SUPERTX
                         xd, w, h, ref, xs, ys);
#endif  // CONFIG_VP9_HIGHBITDEPTH
Jingning Han's avatar
Jingning Han committed
744
745
746
747
748
      return;
    }
  } else {
    // Wait until reference block is ready. Pad 7 more pixels as last 7
    // pixels of each superblock row can be changed by next superblock row.
749
     if (cm->frame_parallel_decode) {
Jingning Han's avatar
Jingning Han committed
750
751
       const int y1 = (y0_16 + (h - 1) * ys) >> SUBPEL_BITS;
       vp10_frameworker_wait(pbi->frame_worker_owner, ref_frame_buf,
752
                             VPXMAX(0, (y1 + 7)) << (plane == 0 ? 0 : 1));
Jingning Han's avatar
Jingning Han committed
753
754
     }
  }
755
756
757
758
759
760
761
762
763
764
765
#if CONFIG_EXT_INTER
  if (ref && get_wedge_bits(mi->mbmi.sb_type) &&
      mi->mbmi.use_wedge_interinter) {
    vp10_make_masked_inter_predictor(
        buf_ptr, buf_stride, dst, dst_buf->stride,
        subpel_x, subpel_y, sf, w, h,
        interp_filter, xs, ys,
#if CONFIG_SUPERTX
        plane, wedge_offset_x, wedge_offset_y,
#endif  // CONFIG_SUPERTX
        xd);
Jingning Han's avatar
Jingning Han committed
766
  } else {
767
768
769
    vp10_make_inter_predictor(buf_ptr, buf_stride, dst, dst_buf->stride,
                              subpel_x, subpel_y, sf, w, h, ref,
                              interp_filter, xs, ys, xd);
Jingning Han's avatar
Jingning Han committed
770
771
  }
#else
772
773
774
775
  vp10_make_inter_predictor(buf_ptr, buf_stride, dst, dst_buf->stride,
                            subpel_x, subpel_y, sf, w, h, ref,
                            interp_filter, xs, ys, xd);
#endif  // CONFIG_EXT_INTER
Jingning Han's avatar
Jingning Han committed
776
}
Yue Chen's avatar
Yue Chen committed
777
#endif  // (CONFIG_SUPERTX || CONFIG_OBMC)
Jingning Han's avatar
Jingning Han committed
778

Yue Chen's avatar
Yue Chen committed
779
#if CONFIG_SUPERTX
780
781
782
783
784
785
static void dec_build_inter_predictors_sb_extend(
    VP10Decoder *const pbi, MACROBLOCKD *xd,
#if CONFIG_EXT_INTER
    int mi_row_ori, int mi_col_ori,
#endif  // CONFIG_EXT_INTER
    int mi_row, int mi_col) {
Jingning Han's avatar
Jingning Han committed
786
787
788
  int plane;
  const int mi_x = mi_col * MI_SIZE;
  const int mi_y = mi_row * MI_SIZE;
789
790
791
792
#if CONFIG_EXT_INTER
  const int wedge_offset_x = (mi_col_ori - mi_col) * MI_SIZE;
  const int wedge_offset_y = (mi_row_ori - mi_row) * MI_SIZE;
#endif  // CONFIG_EXT_INTER
Jingning Han's avatar
Jingning Han committed
793
  const MODE_INFO *mi = xd->mi[0];
794
  const INTERP_FILTER interp_filter = mi->mbmi.interp_filter;
Jingning Han's avatar
Jingning Han committed
795
796
797
798
799
  const BLOCK_SIZE sb_type = mi->mbmi.sb_type;
  const int is_compound = has_second_ref(&mi->mbmi);

  for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
    struct macroblockd_plane *const pd = &xd->plane[plane];
800

Jingning Han's avatar
Jingning Han committed
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
    struct buf_2d *const dst_buf = &pd->dst;
    const int num_4x4_w = pd->n4_w;
    const int num_4x4_h = pd->n4_h;

    const int n4w_x4 = 4 * num_4x4_w;
    const int n4h_x4 = 4 * num_4x4_h;
    int ref;

    for (ref = 0; ref < 1 + is_compound; ++ref) {
      const struct scale_factors *const sf = &xd->block_refs[ref]->sf;
      struct buf_2d *const pre_buf = &pd->pre[ref];
      const int idx = xd->block_refs[ref]->idx;
      BufferPool *const pool = pbi->common.buffer_pool;
      RefCntBuffer *const ref_frame_buf = &pool->frame_bufs[idx];
      const int is_scaled = vp10_is_scaled(sf);

      if (sb_type < BLOCK_8X8) {
818
819
820
821
822
823
824
        const PARTITION_TYPE bp = BLOCK_8X8 - sb_type;
        const int have_vsplit = bp != PARTITION_HORZ;
        const int have_hsplit = bp != PARTITION_VERT;
        const int num_4x4_w = 2 >> ((!have_vsplit) | pd->subsampling_x);
        const int num_4x4_h = 2 >> ((!have_hsplit) | pd->subsampling_y);
        const int pw = 8 >> (have_vsplit | pd->subsampling_x);
        const int ph = 8 >> (have_hsplit | pd->subsampling_y);
825
        int x, y;
Jingning Han's avatar
Jingning Han committed
826
827
        for (y = 0; y < num_4x4_h; ++y) {
          for (x = 0; x < num_4x4_w; ++x) {
828
            const MV mv = average_split_mvs(pd, mi, ref, y * 2 + x);
829
830
831
832
833
834
835
836
837
838
839
840
841
842
            dec_build_inter_predictors(
                pbi, xd, plane,
#if CONFIG_OBMC
                0, 0,
#endif  // CONFIG_OBMC
                n4w_x4, n4h_x4,
                4 * x, 4 * y, pw, ph,
#if CONFIG_EXT_INTER
                wedge_offset_x >> (pd->subsampling_x),
                wedge_offset_y >> (pd->subsampling_y),
#endif  // CONFIG_EXT_INTER
                mi_x, mi_y,
                interp_filter, sf, pre_buf, dst_buf,
                &mv, ref_frame_buf, is_scaled, ref);
Jingning Han's avatar
Jingning Han committed
843
844
845
846
          }
        }
      } else {
        const MV mv = mi->mbmi.mv[ref].as_mv;
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
        dec_build_inter_predictors(
            pbi, xd, plane,
#if CONFIG_OBMC
            0, 0,
#endif  // CONFIG_OBMC
            n4w_x4, n4h_x4,
            0, 0, n4w_x4, n4h_x4,
#if CONFIG_EXT_INTER
            wedge_offset_x >> (pd->subsampling_x),
            wedge_offset_y >> (pd->subsampling_y),
#endif  // CONFIG_EXT_INTER
            mi_x, mi_y,
            interp_filter, sf, pre_buf, dst_buf,
            &mv, ref_frame_buf,
            is_scaled, ref);
Jingning Han's avatar
Jingning Han committed
862
863
864
      }
    }
  }
865
#if CONFIG_EXT_INTER
866
  if (is_interintra_pred(&mi->mbmi))
867
868
869
870
871
872
873
874
875
    vp10_build_interintra_predictors(xd,
                                     xd->plane[0].dst.buf,
                                     xd->plane[1].dst.buf,
                                     xd->plane[2].dst.buf,
                                     xd->plane[0].dst.stride,
                                     xd->plane[1].dst.stride,
                                     xd->plane[2].dst.stride,
                                     sb_type);
#endif  // CONFIG_EXT_INTER
Jingning Han's avatar
Jingning Han committed
876
}
877

878
879
880
881
882
883
884
885
static void dec_build_inter_predictors_sb_sub8x8_extend(
    VP10Decoder *const pbi,
    MACROBLOCKD *xd,
#if CONFIG_EXT_INTER
    int mi_row_ori, int mi_col_ori,
#endif  // CONFIG_EXT_INTER
    int mi_row, int mi_col,
    int block) {
886
887
888
889
890
  // Prediction function used in supertx:
  // Use the mv at current block (which is less than 8x8)
  int plane;
  const int mi_x = mi_col * MI_SIZE;
  const int mi_y = mi_row * MI_SIZE;
891
892
893
894
#if CONFIG_EXT_INTER
  const int wedge_offset_x = (mi_col_ori - mi_col) * MI_SIZE;
  const int wedge_offset_y = (mi_row_ori - mi_row) * MI_SIZE;
#endif  // CONFIG_EXT_INTER
895
  const MODE_INFO *mi = xd->mi[0];
896
  const INTERP_FILTER interp_filter = mi->mbmi.interp_filter;
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
  const int is_compound = has_second_ref(&mi->mbmi);

  // For sub8x8 uv:
  // Skip uv prediction in supertx except the first block (block = 0)
  int max_plane = block ? 1 : MAX_MB_PLANE;

  for (plane = 0; plane < max_plane; ++plane) {
    struct macroblockd_plane *const pd = &xd->plane[plane];
    struct buf_2d *const dst_buf = &pd->dst;
    const int num_4x4_w = pd->n4_w;
    const int num_4x4_h = pd->n4_h;

    const int n4w_x4 = 4 * num_4x4_w;
    const int n4h_x4 = 4 * num_4x4_h;
    int ref;

    for (ref = 0; ref < 1 + is_compound; ++ref) {
      const struct scale_factors *const sf = &xd->block_refs[ref]->sf;
      struct buf_2d *const pre_buf = &pd->pre[ref];
      const int idx = xd->block_refs[ref]->idx;
      BufferPool *const pool = pbi->common.buffer_pool;
      RefCntBuffer *const ref_frame_buf = &pool->frame_bufs[idx];
      const int is_scaled = vp10_is_scaled(sf);
      const MV mv = average_split_mvs(pd, mi, ref, block);
921
922
923
924
925
926
927
928
929
930
931
      dec_build_inter_predictors(pbi, xd, plane,
#if CONFIG_OBMC
                                 0, 0,
#endif  // CONFIG_OBMC
                                 n4w_x4, n4h_x4,
                                 0, 0, n4w_x4, n4h_x4,
#if CONFIG_EXT_INTER
                                 wedge_offset_x >> (pd->subsampling_x),
                                 wedge_offset_y >> (pd->subsampling_y),
#endif  // CONFIG_EXT_INTER
                                 mi_x, mi_y,
932
933
                                 interp_filter, sf, pre_buf, dst_buf,
                                 &mv, ref_frame_buf, is_scaled, ref);
934
935
    }
  }
936
#if CONFIG_EXT_INTER
937
  if (is_interintra_pred(&mi->mbmi))
938
939
940
941
942
943
944
    vp10_build_interintra_predictors(xd,
                                     xd->plane[0].dst.buf,
                                     xd->plane[1].dst.buf,
                                     xd->plane[2].dst.buf,
                                     xd->plane[0].dst.stride,
                                     xd->plane[1].dst.stride,
                                     xd->plane[2].dst.stride,
945
                                     mi->mbmi.sb_type);
946
#endif  // CONFIG_EXT_INTER
947
}
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
#endif  // CONFIG_SUPERTX

#if CONFIG_OBMC
static void dec_build_prediction_by_above_preds(VP10Decoder *const pbi,
                                                MACROBLOCKD *xd,
                                                int mi_row, int mi_col,
                                                uint8_t *tmp_buf[MAX_MB_PLANE],
                                                int tmp_stride[MAX_MB_PLANE]) {
  VP10_COMMON *const cm = &pbi->common;
  BLOCK_SIZE bsize = xd->mi[0]->mbmi.sb_type;
  int i, j, mi_step, ref;

  if (mi_row == 0)
    return;

  for (i = 0; i < VPXMIN(xd->n8_w, cm->mi_cols - mi_col); i += mi_step) {
    int mi_row_offset = -1;
    int mi_col_offset = i;
    int mi_x, mi_y, bw, bh;
    const MODE_INFO *mi = xd->mi[mi_col_offset + mi_row_offset * cm->mi_stride];
    const MB_MODE_INFO *mbmi = &mi->mbmi;
    const BLOCK_SIZE sb_type = mbmi->sb_type;
    const int is_compound = has_second_ref(mbmi);
    const INTERP_FILTER interp_filter = mbmi->interp_filter;

    mi_step = VPXMIN(xd->n8_w, num_8x8_blocks_wide_lookup[sb_type]);

975
    if (!is_neighbor_overlappable(mbmi))
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
      continue;

    for (j = 0; j < MAX_MB_PLANE; ++j) {
      struct macroblockd_plane *const pd = &xd->plane[j];
      setup_pred_plane(&pd->dst,
                       tmp_buf[j], tmp_stride[j],
                       0, i, NULL,
                       pd->subsampling_x, pd->subsampling_y);
    }
    for (ref = 0; ref < 1 + is_compound; ++ref) {
      MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref];
      RefBuffer *ref_buf = &cm->frame_refs[frame - LAST_FRAME];

      xd->block_refs[ref] = ref_buf;
      if ((!vp10_is_valid_scale(&ref_buf->sf)))
        vpx_internal_error(xd->error_info, VPX_CODEC_UNSUP_BITSTREAM,
                           "Reference frame has invalid dimensions");
      vp10_setup_pre_planes(xd, ref, ref_buf->buf, mi_row, mi_col + i,
                            &ref_buf->sf);
    }

    xd->mb_to_left_edge = -(((mi_col + i) * MI_SIZE) * 8);
    mi_x = (mi_col + i) << MI_SIZE_LOG2;
    mi_y = mi_row << MI_SIZE_LOG2;

    for (j = 0; j < MAX_MB_PLANE; ++j) {
      struct macroblockd_plane *pd = &xd->plane[j];
      struct buf_2d *const dst_buf = &pd->dst;
      bw = (mi_step * 8) >> pd->subsampling_x;
      bh = VPXMAX((num_4x4_blocks_high_lookup[bsize] * 2) >> pd->subsampling_y,
                  4);

      for (ref = 0; ref < 1 + is_compound; ++ref) {
        const struct scale_factors *const sf = &xd->block_refs[ref]->sf;
        struct buf_2d *const pre_buf = &pd->pre[ref];
        const int idx = xd->block_refs[ref]->idx;
        BufferPool *const pool = pbi->common.buffer_pool;
        RefCntBuffer *const ref_frame_buf = &pool->frame_bufs[idx];
        const int is_scaled = vp10_is_scaled(sf);

        if (sb_type < BLOCK_8X8) {
          const PARTITION_TYPE bp = BLOCK_8X8 - sb_type;
          const int have_vsplit = bp != PARTITION_HORZ;
          const int have_hsplit = bp != PARTITION_VERT;
          const int num_4x4_w = 2 >> ((!have_vsplit) | pd->subsampling_x);
          const int num_4x4_h = 2 >> ((!have_hsplit) | pd->subsampling_y);
          const int pw = 8 >> (have_vsplit | pd->subsampling_x);
          int x, y;

          for (y = 0; y < num_4x4_h; ++y)
            for (x = 0; x < num_4x4_w; ++x) {
              const MV mv = average_split_mvs(pd, mi, ref, y * 2 + x);
              if ((bp == PARTITION_HORZ || bp == PARTITION_SPLIT)
                  && y == 0 && !pd->subsampling_y)
                continue;

1032
1033
1034
1035
1036
1037
1038
1039
              dec_build_inter_predictors(pbi, xd, j,
                                         mi_col_offset, mi_row_offset,
                                         bw, bh,
                                         4 * x, 0, pw, bh,
#if CONFIG_EXT_INTER && CONFIG_SUPERTX
                                         0, 0,
#endif  // CONFIG_EXT_INTER && CONFIG_SUPERTX
                                         mi_x, mi_y,
1040
1041
1042
1043
1044
                                         interp_filter, sf, pre_buf, dst_buf,
                                         &mv, ref_frame_buf, is_scaled, ref);
            }
        } else {
          const MV mv = mi->mbmi.mv[ref].as_mv;
1045
1046
1047
1048
1049
1050
1051
1052
          dec_build_inter_predictors(pbi, xd, j,
                                     mi_col_offset, mi_row_offset,
                                     bw, bh,
                                     0, 0, bw, bh,
#if CONFIG_EXT_INTER && CONFIG_SUPERTX
                                     0, 0,
#endif  // CONFIG_EXT_INTER && CONFIG_SUPERTX
                                     mi_x, mi_y, interp_filter,
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
                                     sf, pre_buf, dst_buf, &mv, ref_frame_buf,
                                     is_scaled, ref);
        }
      }
    }
  }
  xd->mb_to_left_edge   = -((mi_col * MI_SIZE) * 8);
}

static void dec_build_prediction_by_left_preds(VP10Decoder *const pbi,
                                               MACROBLOCKD *xd,
                                               int mi_row, int mi_col,
                                               uint8_t *tmp_buf[MAX_MB_PLANE],
                                               int tmp_stride[MAX_MB_PLANE]) {
  VP10_COMMON *const cm = &pbi->common;
  const TileInfo *const tile = &xd->tile;
  BLOCK_SIZE bsize = xd->mi[0]->mbmi.sb_type;
  int i, j, mi_step, ref;

  if (mi_col == 0 || (mi_col - 1 < tile->mi_col_start) ||
      (mi_col - 1) >= tile->mi_col_end)
    return;

  for (i = 0; i < VPXMIN(xd->n8_h, cm->mi_rows - mi_row); i += mi_step) {
    int mi_row_offset = i;
    int mi_col_offset = -1;
    int mi_x, mi_y, bw, bh;
    const MODE_INFO *mi = xd->mi[mi_col_offset + mi_row_offset * cm->mi_stride];
    const MB_MODE_INFO *mbmi = &mi->mbmi;
    const BLOCK_SIZE sb_type = mbmi->sb_type;
    const int is_compound = has_second_ref(mbmi);
    const INTERP_FILTER interp_filter = mbmi->interp_filter;

    mi_step = VPXMIN(xd->n8_h, num_8x8_blocks_high_lookup[sb_type]);

1088
    if (!is_neighbor_overlappable(mbmi))
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
      continue;

    for (j = 0; j < MAX_MB_PLANE; ++j) {
      struct macroblockd_plane *const pd = &xd->plane[j];
      setup_pred_plane(&pd->dst,
                       tmp_buf[j], tmp_stride[j],
                       i, 0, NULL,
                       pd->subsampling_x, pd->subsampling_y);
    }

    for (ref = 0; ref < 1 + is_compound; ++ref) {
      MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref];
      RefBuffer *ref_buf = &cm->frame_refs[frame - LAST_FRAME];

      xd->block_refs[ref] = ref_buf;
      if ((!vp10_is_valid_scale(&ref_buf->sf)))
        vpx_internal_error(xd->error_info, VPX_CODEC_UNSUP_BITSTREAM,
                           "Reference frame has invalid dimensions");
      vp10_setup_pre_planes(xd, ref, ref_buf->buf, mi_row + i, mi_col,
                            &ref_buf->sf);
    }

    xd->mb_to_top_edge    = -(((mi_row + i) * MI_SIZE) * 8);
    mi_x = mi_col << MI_SIZE_LOG2;
    mi_y = (mi_row + i) << MI_SIZE_LOG2;

    for (j = 0; j < MAX_MB_PLANE; ++j) {
      struct macroblockd_plane *pd = &xd->plane[j];
      struct buf_2d *const dst_buf = &pd->dst;
      bw = VPXMAX((num_4x4_blocks_wide_lookup[bsize] * 2) >> pd->subsampling_x,
                  4);
      bh = (mi_step << MI_SIZE_LOG2) >> pd->subsampling_y;

      for (ref = 0; ref < 1 + is_compound; ++ref) {
        const struct scale_factors *const sf = &xd->block_refs[ref]->sf;
        struct buf_2d *const pre_buf = &pd->pre[ref];
        const int idx = xd->block_refs[ref]->idx;
        BufferPool *const pool = pbi->common.buffer_pool;
        RefCntBuffer *const ref_frame_buf = &pool->frame_bufs[idx];
        const int is_scaled = vp10_is_scaled(sf);

        if (sb_type < BLOCK_8X8) {
          const PARTITION_TYPE bp = BLOCK_8X8 - sb_type;
          const int have_vsplit = bp != PARTITION_HORZ;
          const int have_hsplit = bp != PARTITION_VERT;
          const int num_4x4_w = 2 >> ((!have_vsplit) | pd->subsampling_x);
          const int num_4x4_h = 2 >> ((!have_hsplit) | pd->subsampling_y);
          const int ph = 8 >> (have_hsplit | pd->subsampling_y);
          int x, y;

          for (y = 0; y < num_4x4_h; ++y)
            for (x = 0; x < num_4x4_w; ++x) {
              const MV mv = average_split_mvs(pd, mi, ref, y * 2 + x);
              if ((bp == PARTITION_VERT || bp == PARTITION_SPLIT)
                  && x == 0 && !pd->subsampling_x)
                continue;

1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
              dec_build_inter_predictors(pbi, xd, j,
#if CONFIG_OBMC
                                         mi_col_offset, mi_row_offset,
#endif  // CONFIG_OBMC
                                         bw, bh,
                                         0, 4 * y, bw, ph,
#if CONFIG_EXT_INTER && CONFIG_SUPERTX
                                         0, 0,
#endif  // CONFIG_EXT_INTER && CONFIG_SUPERTX
                                         mi_x, mi_y,
1156
1157
1158
1159
1160
                                         interp_filter, sf, pre_buf, dst_buf,
                                         &mv, ref_frame_buf, is_scaled, ref);
            }
        } else {
          const MV mv = mi->mbmi.mv[ref].as_mv;
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
          dec_build_inter_predictors(pbi, xd, j,
#if CONFIG_OBMC
                                     mi_col_offset, mi_row_offset,
#endif  // CONFIG_OBMC
                                     bw, bh,
                                     0, 0, bw, bh,
#if CONFIG_EXT_INTER && CONFIG_SUPERTX
                                     0, 0,
#endif  // CONFIG_EXT_INTER && CONFIG_SUPERTX
                                     mi_x, mi_y, interp_filter,
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
                                     sf, pre_buf, dst_buf, &mv, ref_frame_buf,
                                     is_scaled, ref);
        }
      }
    }
  }
  xd->mb_to_top_edge    = -((mi_row * MI_SIZE) * 8);
}
#endif  // CONFIG_OBMC

Jingning Han's avatar
Jingning Han committed
1181
1182
1183
static INLINE TX_SIZE dec_get_uv_tx_size(const MB_MODE_INFO *mbmi,
                                         int n4_wl, int n4_hl) {
  // get minimum log2 num4x4s dimension
1184
1185
  const int x = VPXMIN(n4_wl, n4_hl);
  return VPXMIN(mbmi->tx_size,  x);
Jingning Han's avatar
Jingning Han committed
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
}

static INLINE void dec_reset_skip_context(MACROBLOCKD *xd) {
  int i;
  for (i = 0; i < MAX_MB_PLANE; i++) {
    struct macroblockd_plane *const pd = &xd->plane[i];
    memset(pd->above_context, 0, sizeof(ENTROPY_CONTEXT) * pd->n4_w);
    memset(pd->left_context, 0, sizeof(ENTROPY_CONTEXT) * pd->n4_h);
  }
}

static void set_plane_n4(MACROBLOCKD *const xd, int bw, int bh, int bwl,
                         int bhl) {
  int i;
  for (i = 0; i < MAX_MB_PLANE; i++) {
    xd->plane[i].n4_w = (bw << 1) >> xd->plane[i].subsampling_x;
    xd->plane[i].n4_h = (bh << 1) >> xd->plane[i].subsampling_y;
    xd->plane[i].n4_wl = bwl - xd->plane[i].subsampling_x;
    xd->plane[i].n4_hl = bhl - xd->plane[i].subsampling_y;
  }
}

Yaowu Xu's avatar
Yaowu Xu committed
1208
static MB_MODE_INFO *set_offsets(VP10_COMMON *const cm, MACROBLOCKD *const xd,
Jingning Han's avatar
Jingning Han committed
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
                                 BLOCK_SIZE bsize, int mi_row, int mi_col,
                                 int bw, int bh, int x_mis, int y_mis,
                                 int bwl, int bhl) {
  const int offset = mi_row * cm->mi_stride + mi_col;
  int x, y;
  const TileInfo *const tile = &xd->tile;

  xd->mi = cm->mi_grid_visible + offset;
  xd->mi[0] = &cm->mi[offset];
  // TODO(slavarnway): Generate sb_type based on bwl and bhl, instead of
  // passing bsize from decode_partition().
  xd->mi[0]->mbmi.sb_type = bsize;
  for (y = 0; y < y_mis; ++y)
    for (x = !y; x < x_mis; ++x) {
      xd->mi[y * cm->mi_stride + x] = xd->mi[0];
    }

  set_plane_n4(xd, bw, bh, bwl, bhl);

  set_skip_context(xd, mi_row, mi_col);

1230
1231
1232
1233
1234

#if CONFIG_VAR_TX
  xd->max_tx_size = max_txsize_lookup[bsize];
#endif

Jingning Han's avatar
Jingning Han committed
1235
1236
1237
1238
1239
1240
1241
1242
  // Distance of Mb to the various image edges. These are specified to 8th pel
  // as they are always compared to values that are in 1/8th pel units
  set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols);

  vp10_setup_dst_planes(xd->plane, get_frame_new_buffer(cm), mi_row, mi_col);
  return &xd->mi[0]->mbmi;
}

1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
#if CONFIG_SUPERTX
static MB_MODE_INFO *set_offsets_extend(VP10_COMMON *const cm,
                                        MACROBLOCKD *const xd,
                                        const TileInfo *const tile,
                                        BLOCK_SIZE bsize_pred,
                                        int mi_row_pred, int mi_col_pred,
                                        int mi_row_ori, int mi_col_ori) {
  // Used in supertx
  // (mi_row_ori, mi_col_ori): location for mv
  // (mi_row_pred, mi_col_pred, bsize_pred): region to predict
  const int bw = num_8x8_blocks_wide_lookup[bsize_pred];
  const int bh = num_8x8_blocks_high_lookup[bsize_pred];
  const int offset = mi_row_ori * cm->mi_stride + mi_col_ori;
  const int bwl = b_width_log2_lookup[bsize_pred];
  const int bhl = b_height_log2_lookup[bsize_pred];
  xd->mi = cm->mi_grid_visible + offset;
  xd->mi[0] = cm->mi + offset;
  set_mi_row_col(xd, tile, mi_row_pred, bh, mi_col_pred, bw,
                 cm->mi_rows, cm->mi_cols);

  xd->up_available    = (mi_row_ori != 0);
  xd->left_available  = (mi_col_ori > tile->mi_col_start);

  set_plane_n4(xd, bw, bh, bwl, bhl);

  return &xd->mi[0]->mbmi;
}

static MB_MODE_INFO *set_mb_offsets(VP10_COMMON *const cm,
                                    MACROBLOCKD *const xd,
                                    BLOCK_SIZE bsize,
                                    int mi_row, int mi_col,
                                    int bw, int bh,
                                    int x_mis, int y_mis) {
  const int offset = mi_row * cm->mi_stride + mi_col;
  const TileInfo *const tile = &xd->tile;
  int x, y;

  xd->mi = cm->mi_grid_visible + offset;
  xd->mi[0] = cm->mi + offset;
  xd->mi[0]->mbmi.sb_type = bsize;
  for (y = 0; y < y_mis; ++y)
    for (x = !y; x < x_mis; ++x)
      xd->mi[y * cm->mi_stride + x] = xd->mi[0];

  set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols);
  return &xd->mi[0]->mbmi;
}

static void set_offsets_topblock(VP10_COMMON *const cm, MACROBLOCKD *const xd,
                                 const TileInfo *const tile,
                                 BLOCK_SIZE bsize, int mi_row, int mi_col) {
  const int bw = num_8x8_blocks_wide_lookup[bsize];
  const int bh = num_8x8_blocks_high_lookup[bsize];
  const int offset = mi_row * cm->mi_stride + mi_col;
  const int bwl = b_width_log2_lookup[bsize];
  const int bhl = b_height_log2_lookup[bsize];

  xd->mi = cm->mi_grid_visible + offset;
  xd->mi[0] = cm->mi + offset;

  set_plane_n4(xd, bw, bh, bwl, bhl);

  set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols);

  vp10_setup_dst_planes(xd->plane, get_frame_new_buffer(cm), mi_row, mi_col);
}

static void set_param_topblock(VP10_COMMON *const cm,  MACROBLOCKD *const xd,
                               BLOCK_SIZE bsize, int mi_row, int mi_col,
1313
                               int txfm, int skip) {
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
  const int bw = num_8x8_blocks_wide_lookup[bsize];
  const int bh = num_8x8_blocks_high_lookup[bsize];
  const int x_mis = VPXMIN(bw, cm->mi_cols - mi_col);
  const int y_mis = VPXMIN(bh, cm->mi_rows - mi_row);
  const int offset = mi_row * cm->mi_stride + mi_col;
  int x, y;

  xd->mi = cm->mi_grid_visible + offset;
  xd->mi[0] = cm->mi + offset;

  for (y = 0; y < y_mis; ++y)
    for (x = 0; x < x_mis; ++x) {
      xd->mi[y * cm->mi_stride + x]->mbmi.skip = skip;
      xd->mi[y * cm->mi_stride + x]->mbmi.tx_type = txfm;
    }
1329
1330
1331
1332
1333
1334
#if CONFIG_VAR_TX
  xd->above_txfm_context = cm->above_txfm_context + mi_col;
  xd->left_txfm_context = xd->left_txfm_context_buffer + (mi_row & 0x07);
  set_txfm_ctx(xd->left_txfm_context, xd->mi[0]->mbmi.tx_size, bh);
  set_txfm_ctx(xd->above_txfm_context, xd->mi[0]->mbmi.tx_size, bw);
#endif
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
}

static void set_ref(VP10_COMMON *const cm, MACROBLOCKD *const xd,
                    int idx, int mi_row, int mi_col) {
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  RefBuffer *ref_buffer = &cm->frame_refs[mbmi->ref_frame[idx] - LAST_FRAME];
  xd->block_refs[idx] = ref_buffer;
  if (!vp10_is_valid_scale(&ref_buffer->sf))
    vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
                       "Invalid scale factors");
  vp10_setup_pre_planes(xd, idx, ref_buffer->buf, mi_row, mi_col,
                        &ref_buffer->sf);
  xd->corrupted |= ref_buffer->buf->corrupted;
}

static void dec_predict_b_extend(
    VP10Decoder *const pbi, MACROBLOCKD *const xd,
    const TileInfo *const tile, int block,
    int mi_row_ori, int mi_col_ori,
    int mi_row_pred, int mi_col_pred,
    int mi_row_top, int mi_col_top,
    uint8_t * dst_buf[3], int dst_stride[3],
    BLOCK_SIZE bsize_top,
    BLOCK_SIZE bsize_pred,
    int b_sub8x8, int bextend) {
  // Used in supertx
  // (mi_row_ori, mi_col_ori): location for mv
  // (mi_row_pred, mi_col_pred, bsize_pred): region to predict
  // (mi_row_top, mi_col_top, bsize_top): region of the top partition size
  // block: sub location of sub8x8 blocks
  // b_sub8x8: 1: ori is sub8x8; 0: ori is not sub8x8
  // bextend: 1: region to predict is an extension of ori; 0: not
  int r = (mi_row_pred - mi_row_top) * MI_SIZE;
  int c = (mi_col_pred - mi_col_top) * MI_SIZE;
  const int mi_width_top = num_8x8_blocks_wide_lookup[bsize_top];
  const int mi_height_top = num_8x8_blocks_high_lookup[bsize_top];
  MB_MODE_INFO *mbmi;
  VP10_COMMON *const cm = &pbi->common;

  if (mi_row_pred < mi_row_top || mi_col_pred < mi_col_top ||
      mi_row_pred >= mi_row_top + mi_height_top ||
      mi_col_pred >= mi_col_top + mi_width_top ||
      mi_row_pred >= cm->mi_rows || mi_col_pred >= cm->mi_cols)
    return;

  mbmi = set_offsets_extend(cm, xd, tile, bsize_pred,
                            mi_row_pred, mi_col_pred,
                            mi_row_ori, mi_col_ori);
  set_ref(cm, xd, 0, mi_row_pred, mi_col_pred);
  if (has_second_ref(&xd->mi[0]->mbmi))
    set_ref(cm, xd, 1, mi_row_pred, mi_col_pred);

  if (!bextend) {
    mbmi->tx_size = b_width_log2_lookup[bsize_top];
  }

  xd->plane[0].dst.stride = dst_stride[0];
  xd->plane[1].dst.stride = dst_stride[1];
  xd->plane[2].dst.stride = dst_stride[2];
  xd->plane[0].dst.buf = dst_buf[0] +
                         (r >> xd->plane[0].subsampling_y) * dst_stride[0] +
                         (c >> xd->plane[0].subsampling_x);
  xd->plane[1].dst.buf = dst_buf[1] +
                         (r >> xd->plane[1].subsampling_y) * dst_stride[1] +
                         (c >> xd->plane[1].subsampling_x);
  xd->plane[2].dst.buf = dst_buf[2] +
                         (r >> xd->plane[2].subsampling_y) * dst_stride[2] +
                         (c >> xd->plane[2].subsampling_x);

  if (!b_sub8x8)
1405
1406
1407
1408
1409
1410
    dec_build_inter_predictors_sb_extend(
        pbi, xd,
#if CONFIG_EXT_INTER
        mi_row_ori, mi_col_ori,
#endif  // CONFIG_EXT_INTER
        mi_row_pred, mi_col_pred);
1411
  else
1412
1413
1414
1415
1416
1417
    dec_build_inter_predictors_sb_sub8x8_extend(
        pbi, xd,
#if CONFIG_EXT_INTER
        mi_row_ori, mi_col_ori,
#endif  // CONFIG_EXT_INTER
        mi_row_pred, mi_col_pred, block);
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
}

static void dec_extend_dir(VP10Decoder *const pbi, MACROBLOCKD *const xd,
                           const TileInfo *const tile, int block,
                           BLOCK_SIZE bsize, BLOCK_SIZE top_bsize,
                           int mi_row, int mi_col,
                           int mi_row_top, int mi_col_top,
                           uint8_t * dst_buf[3], int dst_stride[3], int dir) {
  // dir: 0-lower, 1-upper, 2-left, 3-right
  //      4-lowerleft, 5-upperleft, 6-lowerright, 7-upperright
  const int mi_width = num_8x8_blocks_wide_lookup[bsize];
  const int mi_height = num_8x8_blocks_high_lookup[bsize];
  int xss = xd->plane[1].subsampling_x;
  int yss = xd->plane[1].subsampling_y;
  int b_sub8x8 = (bsize < BLOCK_8X8) ? 1 : 0;
  BLOCK_SIZE extend_bsize;
  int unit, mi_row_pred, mi_col_pred;

  if (dir == 0 || dir == 1) {
    extend_bsize = (mi_width == 1 || bsize < BLOCK_8X8 || xss < yss) ?
                    BLOCK_8X8 : BLOCK_16X8;
    unit = num_8x8_blocks_wide_lookup[extend_bsize];
    mi_row_pred = mi_row + ((dir == 0) ? mi_height : -1);
    mi_col_pred = mi_col;

    dec_predict_b_extend(pbi, xd, tile, block, mi_row, mi_col,
                         mi_row_pred, mi_col_pred,
                         mi_row_top, mi_col_top,
                         dst_buf, dst_stride,
                         top_bsize, extend_bsize, b_sub8x8, 1);

    if (mi_width > unit) {
      int i;
      assert(!b_sub8x8);
      for (i = 0; i < mi_width/unit - 1; i++) {
        mi_col_pred += unit;
        dec_predict_b_extend(pbi, xd, tile, block, mi_row, mi_col,
                             mi_row_pred, mi_col_pred,
                             mi_row_top, mi_col_top,
                             dst_buf, dst_stride