vp9_decodemv.c 23.3 KB
Newer Older
John Koleszar's avatar
John Koleszar committed
1
/*
2
  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
John Koleszar's avatar
John Koleszar committed
3
 *
4
 *  Use of this source code is governed by a BSD-style license
5 6
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
7
 *  in the file PATENTS.  All contributing project authors may
8
 *  be found in the AUTHORS file in the root of the source tree.
John Koleszar's avatar
John Koleszar committed
9 10
 */

11 12
#include <assert.h>

13 14
#include "vp9/common/vp9_common.h"
#include "vp9/common/vp9_entropy.h"
15
#include "vp9/common/vp9_entropymode.h"
16
#include "vp9/common/vp9_entropymv.h"
17
#include "vp9/common/vp9_findnearmv.h"
18
#include "vp9/common/vp9_mvref_common.h"
19
#include "vp9/common/vp9_pred_common.h"
20 21 22
#include "vp9/common/vp9_reconinter.h"
#include "vp9/common/vp9_seg_common.h"

23
#include "vp9/decoder/vp9_decodemv.h"
24
#include "vp9/decoder/vp9_decodframe.h"
25
#include "vp9/decoder/vp9_onyxd_int.h"
26
#include "vp9/decoder/vp9_dsubexp.h"
27 28
#include "vp9/decoder/vp9_treereader.h"

29
static MB_PREDICTION_MODE read_intra_mode(vp9_reader *r, const vp9_prob *p) {
30 31 32
  return (MB_PREDICTION_MODE)treed_read(r, vp9_intra_mode_tree, p);
}

33 34 35 36 37 38
static MB_PREDICTION_MODE read_inter_mode(VP9_COMMON *cm, vp9_reader *r,
                                          uint8_t context) {
  MB_PREDICTION_MODE mode = treed_read(r, vp9_inter_mode_tree,
                            cm->fc.inter_mode_probs[context]);
  ++cm->counts.inter_mode[context][inter_mode_offset(mode)];
  return mode;
39 40
}

41 42
static int read_segment_id(vp9_reader *r, const struct segmentation *seg) {
  return treed_read(r, vp9_segment_tree, seg->tree_probs);
Scott LaVarnway's avatar
Scott LaVarnway committed
43
}
44

45 46 47 48 49
static TX_SIZE read_selected_tx_size(VP9_COMMON *cm, MACROBLOCKD *xd,
                                     BLOCK_SIZE_TYPE bsize, vp9_reader *r) {
  const uint8_t context = vp9_get_pred_context_tx_size(xd);
  const vp9_prob *tx_probs = get_tx_probs(bsize, context, &cm->fc.tx_probs);
  TX_SIZE tx_size = vp9_read(r, tx_probs[0]);
50
  if (tx_size != TX_4X4 && bsize >= BLOCK_16X16) {
51
    tx_size += vp9_read(r, tx_probs[1]);
52
    if (tx_size != TX_8X8 && bsize >= BLOCK_32X32)
53
      tx_size += vp9_read(r, tx_probs[2]);
54 55
  }

56
  update_tx_counts(bsize, context, tx_size, &cm->counts.tx);
57
  return tx_size;
58 59
}

60
static TX_SIZE read_tx_size(VP9D_COMP *pbi, TX_MODE tx_mode,
Dmitry Kovalev's avatar
Dmitry Kovalev committed
61
                            BLOCK_SIZE_TYPE bsize, int allow_select,
62
                            vp9_reader *r) {
63 64 65
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;

66
  if (allow_select && tx_mode == TX_MODE_SELECT && bsize >= BLOCK_8X8)
67
    return read_selected_tx_size(cm, xd, bsize, r);
68
  else if (tx_mode >= ALLOW_32X32 && bsize >= BLOCK_32X32)
69
    return TX_32X32;
70
  else if (tx_mode >= ALLOW_16X16 && bsize >= BLOCK_16X16)
71
    return TX_16X16;
72
  else if (tx_mode >= ALLOW_8X8 && bsize >= BLOCK_8X8)
73 74 75 76 77
    return TX_8X8;
  else
    return TX_4X4;
}

78
static void set_segment_id(VP9_COMMON *cm, BLOCK_SIZE_TYPE bsize,
79
                           int mi_row, int mi_col, int segment_id) {
80 81 82
  const int mi_offset = mi_row * cm->mi_cols + mi_col;
  const int bw = 1 << mi_width_log2(bsize);
  const int bh = 1 << mi_height_log2(bsize);
83
  const int xmis = MIN(cm->mi_cols - mi_col, bw);
84
  const int ymis = MIN(cm->mi_rows - mi_row, bh);
85 86
  int x, y;

Paul Wilkins's avatar
Paul Wilkins committed
87
  assert(segment_id >= 0 && segment_id < MAX_SEGMENTS);
88 89 90 91 92 93 94 95 96

  for (y = 0; y < ymis; y++)
    for (x = 0; x < xmis; x++)
      cm->last_frame_seg_map[mi_offset + y * cm->mi_cols + x] = segment_id;
}

static int read_intra_segment_id(VP9D_COMP *pbi, int mi_row, int mi_col,
                                 vp9_reader *r) {
  MACROBLOCKD *const xd = &pbi->mb;
97
  struct segmentation *const seg = &xd->seg;
98
  const BLOCK_SIZE_TYPE bsize = xd->mode_info_context->mbmi.sb_type;
99
  int segment_id;
100

101 102 103 104
  if (!seg->enabled)
    return 0;  // Default for disabled segmentation

  if (!seg->update_map)
105
    return 0;
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130

  segment_id = read_segment_id(r, seg);
  set_segment_id(&pbi->common, bsize, mi_row, mi_col, segment_id);
  return segment_id;
}

static int read_inter_segment_id(VP9D_COMP *pbi, int mi_row, int mi_col,
                                 vp9_reader *r) {
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;
  struct segmentation *const seg = &xd->seg;
  const BLOCK_SIZE_TYPE bsize = xd->mode_info_context->mbmi.sb_type;
  int pred_segment_id, segment_id;

  if (!seg->enabled)
    return 0;  // Default for disabled segmentation

  pred_segment_id = vp9_get_segment_id(cm, cm->last_frame_seg_map,
                                       bsize, mi_row, mi_col);
  if (!seg->update_map)
    return pred_segment_id;

  if (seg->temporal_update) {
    const vp9_prob pred_prob = vp9_get_pred_prob_seg_id(xd);
    const int pred_flag = vp9_read(r, pred_prob);
131
    vp9_set_pred_flag_seg_id(cm, bsize, mi_row, mi_col, pred_flag);
132 133 134 135
    segment_id = pred_flag ? pred_segment_id
                           : read_segment_id(r, seg);
  } else {
    segment_id = read_segment_id(r, seg);
136
  }
137 138
  set_segment_id(cm, bsize, mi_row, mi_col, segment_id);
  return segment_id;
139 140
}

141
static uint8_t read_skip_coeff(VP9D_COMP *pbi, int segment_id, vp9_reader *r) {
142
  VP9_COMMON *const cm = &pbi->common;
143
  MACROBLOCKD *const xd = &pbi->mb;
144
  int skip_coeff = vp9_segfeature_active(&xd->seg, segment_id, SEG_LVL_SKIP);
145
  if (!skip_coeff) {
146
    const int ctx = vp9_get_pred_context_mbskip(xd);
147
    skip_coeff = vp9_read(r, vp9_get_pred_prob_mbskip(cm, xd));
148
    cm->counts.mbskip[ctx][skip_coeff]++;
Deb Mukherjee's avatar
Deb Mukherjee committed
149
  }
150 151
  return skip_coeff;
}
John Koleszar's avatar
John Koleszar committed
152

Dmitry Kovalev's avatar
Dmitry Kovalev committed
153 154
static void read_intra_frame_mode_info(VP9D_COMP *pbi, MODE_INFO *m,
                                       int mi_row, int mi_col, vp9_reader *r) {
155 156 157 158 159
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;
  MB_MODE_INFO *const mbmi = &m->mbmi;
  const BLOCK_SIZE_TYPE bsize = mbmi->sb_type;
  const int mis = cm->mode_info_stride;
160

161 162
  mbmi->segment_id = read_intra_segment_id(pbi, mi_row, mi_col, r);
  mbmi->mb_skip_coeff = read_skip_coeff(pbi, mbmi->segment_id, r);
163
  mbmi->txfm_size = read_tx_size(pbi, cm->tx_mode, bsize, 1, r);
164
  mbmi->ref_frame[0] = INTRA_FRAME;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
165
  mbmi->ref_frame[1] = NONE;
166 167

  if (bsize >= BLOCK_SIZE_SB8X8) {
168 169 170
    const MB_PREDICTION_MODE A = above_block_mode(m, 0, mis);
    const MB_PREDICTION_MODE L = xd->left_available ?
                                  left_block_mode(m, 0) : DC_PRED;
171
    mbmi->mode = read_intra_mode(r, vp9_kf_y_mode_prob[A][L]);
172
  } else {
173
    // Only 4x4, 4x8, 8x4 blocks
Dmitry Kovalev's avatar
Dmitry Kovalev committed
174 175
    const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];  // 1 or 2
    const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];  // 1 or 2
176
    int idx, idy;
177

Dmitry Kovalev's avatar
Dmitry Kovalev committed
178 179
    for (idy = 0; idy < 2; idy += num_4x4_h) {
      for (idx = 0; idx < 2; idx += num_4x4_w) {
180
        const int ib = idy * 2 + idx;
181 182 183
        const MB_PREDICTION_MODE A = above_block_mode(m, ib, mis);
        const MB_PREDICTION_MODE L = (xd->left_available || idx) ?
                                      left_block_mode(m, ib) : DC_PRED;
184
        const MB_PREDICTION_MODE b_mode = read_intra_mode(r,
185
                                              vp9_kf_y_mode_prob[A][L]);
186
        m->bmi[ib].as_mode = b_mode;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
187
        if (num_4x4_h == 2)
188
          m->bmi[ib + 2].as_mode = b_mode;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
189
        if (num_4x4_w == 2)
190
          m->bmi[ib + 1].as_mode = b_mode;
191 192
      }
    }
193

194
    mbmi->mode = m->bmi[3].as_mode;
John Koleszar's avatar
John Koleszar committed
195
  }
Dmitry Kovalev's avatar
Dmitry Kovalev committed
196

197
  mbmi->uv_mode = read_intra_mode(r, vp9_kf_uv_mode_prob[mbmi->mode]);
Scott LaVarnway's avatar
Scott LaVarnway committed
198
}
John Koleszar's avatar
John Koleszar committed
199

200 201
static int read_mv_component(vp9_reader *r,
                             const nmv_component *mvcomp, int usehp) {
202

203
  int mag, d, fr, hp;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
204 205
  const int sign = vp9_read(r, mvcomp->sign);
  const int mv_class = treed_read(r, vp9_mv_class_tree, mvcomp->classes);
206
  const int class0 = mv_class == MV_CLASS_0;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
207

208
  // Integer part
209
  if (class0) {
210
    d = treed_read(r, vp9_mv_class0_tree, mvcomp->class0);
211
  } else {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
212
    int i;
213
    const int n = mv_class + CLASS0_BITS - 1;  // number of bits
Dmitry Kovalev's avatar
Dmitry Kovalev committed
214

215
    d = 0;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
216 217
    for (i = 0; i < n; ++i)
      d |= vp9_read(r, mvcomp->bits[i]) << i;
218 219
  }

220 221
  // Fractional part
  fr = treed_read(r, vp9_mv_fp_tree,
222
                  class0 ? mvcomp->class0_fp[d] : mvcomp->fp);
223 224


225
  // High precision part (if hp is not used, the default value of the hp is 1)
226
  hp = usehp ? vp9_read(r, class0 ? mvcomp->class0_hp : mvcomp->hp)
227
             : 1;
228

229
  // Result
230 231
  mag = vp9_get_mv_mag(mv_class, (d << 3) | (fr << 1) | hp) + 1;
  return sign ? -mag : mag;
232 233
}

234 235
static INLINE void read_mv(vp9_reader *r, MV *mv, const MV *ref,
                           const nmv_context *ctx,
236
                           nmv_context_counts *counts, int allow_hp) {
237
  const MV_JOINT_TYPE j = treed_read(r, vp9_mv_joint_tree, ctx->joints);
238
  const int use_hp = allow_hp && vp9_use_mv_hp(ref);
239 240 241
  MV diff = {0, 0};

  if (mv_joint_vertical(j))
242
    diff.row = read_mv_component(r, &ctx->comps[0], use_hp);
243 244

  if (mv_joint_horizontal(j))
245
    diff.col = read_mv_component(r, &ctx->comps[1], use_hp);
246

247
  vp9_inc_mv(&diff, counts);
248 249 250 251 252

  mv->row = ref->row + diff.row;
  mv->col = ref->col + diff.col;
}

Dmitry Kovalev's avatar
Dmitry Kovalev committed
253 254
static void update_mv(vp9_reader *r, vp9_prob *p) {
  if (vp9_read(r, VP9_NMV_UPDATE_PROB))
255
    *p = (vp9_read_literal(r, 7) << 1) | 1;
256 257
}

258
static void read_mv_probs(vp9_reader *r, nmv_context *mvc, int allow_hp) {
259
  int i, j, k;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
260 261

  for (j = 0; j < MV_JOINTS - 1; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
262
    update_mv(r, &mvc->joints[j]);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
263

264
  for (i = 0; i < 2; ++i) {
265 266
    nmv_component *const comp = &mvc->comps[i];

Dmitry Kovalev's avatar
Dmitry Kovalev committed
267 268
    update_mv(r, &comp->sign);

Dmitry Kovalev's avatar
Dmitry Kovalev committed
269
    for (j = 0; j < MV_CLASSES - 1; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
270
      update_mv(r, &comp->classes[j]);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
271 272

    for (j = 0; j < CLASS0_SIZE - 1; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
273
      update_mv(r, &comp->class0[j]);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
274 275

    for (j = 0; j < MV_OFFSET_BITS; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
276
      update_mv(r, &comp->bits[j]);
277 278 279
  }

  for (i = 0; i < 2; ++i) {
280 281
    nmv_component *const comp = &mvc->comps[i];

282
    for (j = 0; j < CLASS0_SIZE; ++j)
283
      for (k = 0; k < 3; ++k)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
284
        update_mv(r, &comp->class0_fp[j][k]);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
285 286

    for (j = 0; j < 3; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
287
      update_mv(r, &comp->fp[j]);
288 289
  }

290
  if (allow_hp) {
291
    for (i = 0; i < 2; ++i) {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
292 293
      update_mv(r, &mvc->comps[i].class0_hp);
      update_mv(r, &mvc->comps[i].hp);
294 295 296 297
    }
  }
}

298
// Read the referncence frame
Dmitry Kovalev's avatar
Dmitry Kovalev committed
299 300
static void read_ref_frames(VP9D_COMP *pbi, vp9_reader *r,
                            int segment_id, MV_REFERENCE_FRAME ref_frame[2]) {
301
  VP9_COMMON *const cm = &pbi->common;
John Koleszar's avatar
John Koleszar committed
302
  MACROBLOCKD *const xd = &pbi->mb;
303
  FRAME_CONTEXT *const fc = &cm->fc;
304
  FRAME_COUNTS *const counts = &cm->counts;
305

306 307
  if (vp9_segfeature_active(&xd->seg, segment_id, SEG_LVL_REF_FRAME)) {
    ref_frame[0] = vp9_get_segdata(&xd->seg, segment_id, SEG_LVL_REF_FRAME);
308 309
    ref_frame[1] = NONE;
  } else {
310
    const int comp_ctx = vp9_get_pred_context_comp_inter_inter(cm, xd);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
311
    int is_comp;
John Koleszar's avatar
John Koleszar committed
312

Ronald S. Bultje's avatar
Ronald S. Bultje committed
313
    if (cm->comp_pred_mode == HYBRID_PREDICTION) {
314
      is_comp = vp9_read(r, fc->comp_inter_prob[comp_ctx]);
315
      counts->comp_inter[comp_ctx][is_comp]++;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
316 317 318
    } else {
      is_comp = cm->comp_pred_mode == COMP_PREDICTION_ONLY;
    }
John Koleszar's avatar
John Koleszar committed
319

Ronald S. Bultje's avatar
Ronald S. Bultje committed
320 321
    // FIXME(rbultje) I'm pretty sure this breaks segmentation ref frame coding
    if (is_comp) {
322
      const int fix_ref_idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];
323
      const int ref_ctx = vp9_get_pred_context_comp_ref_p(cm, xd);
324
      const int b = vp9_read(r, fc->comp_ref_prob[ref_ctx]);
325
      counts->comp_ref[ref_ctx][b]++;
326
      ref_frame[fix_ref_idx] = cm->comp_fixed_ref;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
327
      ref_frame[!fix_ref_idx] = cm->comp_var_ref[b];
Dmitry Kovalev's avatar
Dmitry Kovalev committed
328
    } else {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
329 330 331 332 333 334 335 336
      const int ctx0 = vp9_get_pred_context_single_ref_p1(xd);
      const int bit0 = vp9_read(r, fc->single_ref_prob[ctx0][0]);
      ++counts->single_ref[ctx0][0][bit0];
      if (bit0) {
        const int ctx1 = vp9_get_pred_context_single_ref_p2(xd);
        const int bit1 = vp9_read(r, fc->single_ref_prob[ctx1][1]);
        ref_frame[0] = bit1 ? ALTREF_FRAME : GOLDEN_FRAME;
        ++counts->single_ref[ctx1][1][bit1];
Ronald S. Bultje's avatar
Ronald S. Bultje committed
337 338
      } else {
        ref_frame[0] = LAST_FRAME;
John Koleszar's avatar
John Koleszar committed
339
      }
Dmitry Kovalev's avatar
Dmitry Kovalev committed
340 341

      ref_frame[1] = NONE;
342
    }
John Koleszar's avatar
John Koleszar committed
343
  }
344
}
John Koleszar's avatar
John Koleszar committed
345

346
static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
347
  int i, j;
348 349 350
  for (j = 0; j < VP9_SWITCHABLE_FILTERS + 1; ++j)
    for (i = 0; i < VP9_SWITCHABLE_FILTERS - 1; ++i)
      if (vp9_read(r, VP9_MODE_UPDATE_PROB))
351
        vp9_diff_update_prob(r, &fc->switchable_interp_prob[j][i]);
352 353
}

354
static void read_inter_mode_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
355 356
  int i, j;
  for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
357 358
    for (j = 0; j < VP9_INTER_MODES - 1; ++j)
      if (vp9_read(r, VP9_MODE_UPDATE_PROB))
359
        vp9_diff_update_prob(r, &fc->inter_mode_probs[i][j]);
360
}
John Koleszar's avatar
John Koleszar committed
361

362 363 364
static INLINE COMPPREDMODE_TYPE read_comp_pred_mode(vp9_reader *r) {
  COMPPREDMODE_TYPE mode = vp9_read_bit(r);
  if (mode)
365
    mode += vp9_read_bit(r);
366 367 368
  return mode;
}

369
static INLINE INTERPOLATIONFILTERTYPE read_switchable_filter_type(
370
    VP9D_COMP *pbi, vp9_reader *r) {
371 372
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;
373
  const vp9_prob *probs = vp9_get_pred_probs_switchable_interp(cm, xd);
374
  const int index = treed_read(r, vp9_switchable_interp_tree, probs);
375
  const int ctx = vp9_get_pred_context_switchable_interp(xd);
376
  ++cm->counts.switchable_interp[ctx][index];
377 378 379
  return vp9_switchable_interp[index];
}

Dmitry Kovalev's avatar
Dmitry Kovalev committed
380
static void read_intra_block_mode_info(VP9D_COMP *pbi, MODE_INFO *mi,
381
                                  vp9_reader *r) {
382
  VP9_COMMON *const cm = &pbi->common;
383
  MB_MODE_INFO *const mbmi = &mi->mbmi;
384 385
  const BLOCK_SIZE_TYPE bsize = mi->mbmi.sb_type;

Dmitry Kovalev's avatar
Dmitry Kovalev committed
386 387 388
  mbmi->ref_frame[0] = INTRA_FRAME;
  mbmi->ref_frame[1] = NONE;

389
  if (bsize >= BLOCK_SIZE_SB8X8) {
390
    const int size_group = size_group_lookup[bsize];
391
    mbmi->mode = read_intra_mode(r, cm->fc.y_mode_prob[size_group]);
392
    cm->counts.y_mode[size_group][mbmi->mode]++;
393
  } else {
394
     // Only 4x4, 4x8, 8x4 blocks
Dmitry Kovalev's avatar
Dmitry Kovalev committed
395 396
     const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];  // 1 or 2
     const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];  // 1 or 2
397
     int idx, idy;
398

Dmitry Kovalev's avatar
Dmitry Kovalev committed
399 400
     for (idy = 0; idy < 2; idy += num_4x4_h) {
       for (idx = 0; idx < 2; idx += num_4x4_w) {
401 402
         const int ib = idy * 2 + idx;
         const int b_mode = read_intra_mode(r, cm->fc.y_mode_prob[0]);
403
         mi->bmi[ib].as_mode = b_mode;
404
         cm->counts.y_mode[0][b_mode]++;
405

Dmitry Kovalev's avatar
Dmitry Kovalev committed
406
         if (num_4x4_h == 2)
407
           mi->bmi[ib + 2].as_mode = b_mode;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
408
         if (num_4x4_w == 2)
409
           mi->bmi[ib + 1].as_mode = b_mode;
410 411
      }
    }
412
    mbmi->mode = mi->bmi[3].as_mode;
413 414 415
  }

  mbmi->uv_mode = read_intra_mode(r, cm->fc.uv_mode_prob[mbmi->mode]);
416
  cm->counts.uv_mode[mbmi->mode][mbmi->uv_mode]++;
417 418
}

Dmitry Kovalev's avatar
Dmitry Kovalev committed
419
static int read_is_inter_block(VP9D_COMP *pbi, int segment_id, vp9_reader *r) {
420 421 422
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;

Dmitry Kovalev's avatar
Dmitry Kovalev committed
423 424 425
  if (vp9_segfeature_active(&xd->seg, segment_id, SEG_LVL_REF_FRAME)) {
    return vp9_get_segdata(&xd->seg, segment_id, SEG_LVL_REF_FRAME) !=
           INTRA_FRAME;
426
  } else {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
427 428 429 430
    const int ctx = vp9_get_pred_context_intra_inter(xd);
    const int is_inter = vp9_read(r, vp9_get_pred_prob_intra_inter(cm, xd));
    ++cm->counts.intra_inter[ctx][is_inter];
    return is_inter;
431 432 433
  }
}

Dmitry Kovalev's avatar
Dmitry Kovalev committed
434
static void read_inter_block_mode_info(VP9D_COMP *pbi, MODE_INFO *mi,
435
                                       int mi_row, int mi_col, vp9_reader *r) {
436
  VP9_COMMON *const cm = &pbi->common;
437
  MACROBLOCKD *const xd = &pbi->mb;
438
  nmv_context *const nmvc = &cm->fc.nmvc;
439
  MB_MODE_INFO *const mbmi = &mi->mbmi;
440 441
  int_mv *const mv0 = &mbmi->mv[0];
  int_mv *const mv1 = &mbmi->mv[1];
442
  const BLOCK_SIZE_TYPE bsize = mbmi->sb_type;
443
  const int allow_hp = xd->allow_high_precision_mv;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
444

445 446
  int_mv nearest, nearby, best_mv;
  int_mv nearest_second, nearby_second, best_mv_second;
447
  uint8_t inter_mode_ctx;
448
  MV_REFERENCE_FRAME ref0, ref1;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
449

Dmitry Kovalev's avatar
Dmitry Kovalev committed
450
  read_ref_frames(pbi, r, mbmi->segment_id, mbmi->ref_frame);
451 452
  ref0 = mbmi->ref_frame[0];
  ref1 = mbmi->ref_frame[1];
453

454
  vp9_find_mv_refs(cm, xd, mi, xd->prev_mode_info_context,
455 456
                   ref0, mbmi->ref_mvs[ref0], cm->ref_frame_sign_bias,
                   mi_row, mi_col);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
457

458
  inter_mode_ctx = mbmi->mb_mode_context[ref0];
459

460
  if (vp9_segfeature_active(&xd->seg, mbmi->segment_id, SEG_LVL_SKIP))
461
    mbmi->mode = ZEROMV;
462 463 464
  else if (bsize >= BLOCK_SIZE_SB8X8)
    mbmi->mode = read_inter_mode(cm, r, inter_mode_ctx);

465
  mbmi->uv_mode = DC_PRED;
466

467 468 469 470 471
  // nearest, nearby
  if (bsize < BLOCK_SIZE_SB8X8 || mbmi->mode != ZEROMV) {
    vp9_find_best_ref_mvs(xd, mbmi->ref_mvs[ref0], &nearest, &nearby);
    best_mv.as_int = mbmi->ref_mvs[ref0][0].as_int;
  }
472

473 474 475 476 477 478
  mbmi->interp_filter = cm->mcomp_filter_type == SWITCHABLE
                            ? read_switchable_filter_type(pbi, r)
                            : cm->mcomp_filter_type;

  if (ref1 > INTRA_FRAME) {
    vp9_find_mv_refs(cm, xd, mi, xd->prev_mode_info_context,
479 480
                     ref1, mbmi->ref_mvs[ref1], cm->ref_frame_sign_bias,
                     mi_row, mi_col);
481 482

    if (bsize < BLOCK_SIZE_SB8X8 || mbmi->mode != ZEROMV) {
483 484 485
      vp9_find_best_ref_mvs(xd, mbmi->ref_mvs[ref1],
                            &nearest_second, &nearby_second);
      best_mv_second.as_int = mbmi->ref_mvs[ref1][0].as_int;
486
    }
487
  }
488

Dmitry Kovalev's avatar
Dmitry Kovalev committed
489 490 491
  if (bsize < BLOCK_SIZE_SB8X8) {
    const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];  // 1 or 2
    const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];  // 1 or 2
492
    int idx, idy;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
493 494
    for (idy = 0; idy < 2; idy += num_4x4_h) {
      for (idx = 0; idx < 2; idx += num_4x4_w) {
495 496
        int_mv blockmv, secondmv;
        const int j = idy * 2 + idx;
497
        const int b_mode = read_inter_mode(cm, r, inter_mode_ctx);
498

499
        if (b_mode == NEARESTMV || b_mode == NEARMV) {
500 501 502
          vp9_append_sub8x8_mvs_for_idx(cm, xd, &nearest, &nearby, j, 0,
                                        mi_row, mi_col);

503 504
          if (ref1 > 0)
            vp9_append_sub8x8_mvs_for_idx(cm, xd,  &nearest_second,
505 506
                                         &nearby_second, j, 1,
                                         mi_row, mi_col);
507
        }
508

509
        switch (b_mode) {
510 511
          case NEWMV:
            read_mv(r, &blockmv.as_mv, &best_mv.as_mv, nmvc,
512
                    &cm->counts.mv, allow_hp);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
513

514
            if (ref1 > 0)
515
              read_mv(r, &secondmv.as_mv, &best_mv_second.as_mv, nmvc,
516
                      &cm->counts.mv, allow_hp);
517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534
            break;
          case NEARESTMV:
            blockmv.as_int = nearest.as_int;
            if (ref1 > 0)
              secondmv.as_int = nearest_second.as_int;
            break;
          case NEARMV:
            blockmv.as_int = nearby.as_int;
            if (ref1 > 0)
              secondmv.as_int = nearby_second.as_int;
            break;
          case ZEROMV:
            blockmv.as_int = 0;
            if (ref1 > 0)
              secondmv.as_int = 0;
            break;
          default:
            assert(!"Invalid inter mode value");
535
        }
536 537 538
        mi->bmi[j].as_mv[0].as_int = blockmv.as_int;
        if (ref1 > 0)
          mi->bmi[j].as_mv[1].as_int = secondmv.as_int;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
539

Dmitry Kovalev's avatar
Dmitry Kovalev committed
540
        if (num_4x4_h == 2)
541
          mi->bmi[j + 2] = mi->bmi[j];
Dmitry Kovalev's avatar
Dmitry Kovalev committed
542
        if (num_4x4_w == 2)
543
          mi->bmi[j + 1] = mi->bmi[j];
544
        mi->mbmi.mode = b_mode;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
545
      }
Scott LaVarnway's avatar
Scott LaVarnway committed
546
    }
547 548 549

    mv0->as_int = mi->bmi[3].as_mv[0].as_int;
    mv1->as_int = mi->bmi[3].as_mv[1].as_int;
John Koleszar's avatar
John Koleszar committed
550
  } else {
551 552
    switch (mbmi->mode) {
      case NEARMV:
553 554 555 556 557 558 559
        mv0->as_int = nearby.as_int;
        clamp_mv2(&mv0->as_mv, xd);

        if (ref1 > 0) {
          mv1->as_int = nearby_second.as_int;
          clamp_mv2(&mv1->as_mv, xd);
        }
560 561 562
        break;

      case NEARESTMV:
563 564 565 566 567 568 569
        mv0->as_int = nearest.as_int;
        clamp_mv2(&mv0->as_mv, xd);

        if (ref1 > 0) {
          mv1->as_int = nearest_second.as_int;
          clamp_mv2(&mv1->as_mv, xd);
        }
570 571 572 573 574 575 576 577 578
        break;

      case ZEROMV:
        mv0->as_int = 0;
        if (ref1 > 0)
          mv1->as_int = 0;
        break;

      case NEWMV:
579
        read_mv(r, &mv0->as_mv, &best_mv.as_mv, nmvc, &cm->counts.mv, allow_hp);
580
        if (ref1 > 0)
581 582
          read_mv(r, &mv1->as_mv, &best_mv_second.as_mv, nmvc, &cm->counts.mv,
                  allow_hp);
583 584 585 586
        break;
      default:
        assert(!"Invalid inter mode value");
    }
John Koleszar's avatar
John Koleszar committed
587
  }
Scott LaVarnway's avatar
Scott LaVarnway committed
588
}
John Koleszar's avatar
John Koleszar committed
589

Dmitry Kovalev's avatar
Dmitry Kovalev committed
590 591
static void read_inter_frame_mode_info(VP9D_COMP *pbi, MODE_INFO *mi,
                                       int mi_row, int mi_col, vp9_reader *r) {
592 593
  VP9_COMMON *const cm = &pbi->common;
  MB_MODE_INFO *const mbmi = &mi->mbmi;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
594
  int inter_block;
595

Dmitry Kovalev's avatar
Dmitry Kovalev committed
596 597
  mbmi->mv[0].as_int = 0;
  mbmi->mv[1].as_int = 0;
598 599
  mbmi->segment_id = read_inter_segment_id(pbi, mi_row, mi_col, r);
  mbmi->mb_skip_coeff = read_skip_coeff(pbi, mbmi->segment_id, r);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
600
  inter_block = read_is_inter_block(pbi, mbmi->segment_id, r);
601
  mbmi->txfm_size = read_tx_size(pbi, cm->tx_mode, mbmi->sb_type,
Dmitry Kovalev's avatar
Dmitry Kovalev committed
602
                                 !mbmi->mb_skip_coeff || !inter_block, r);
603

Dmitry Kovalev's avatar
Dmitry Kovalev committed
604
  if (inter_block)
605
    read_inter_block_mode_info(pbi, mi, mi_row, mi_col, r);
606
  else
Dmitry Kovalev's avatar
Dmitry Kovalev committed
607
    read_intra_block_mode_info(pbi, mi, r);
608 609
}

610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634
static void read_comp_pred(VP9_COMMON *cm, vp9_reader *r) {
  int i;

  cm->comp_pred_mode = cm->allow_comp_inter_inter ? read_comp_pred_mode(r)
                                                  : SINGLE_PREDICTION_ONLY;

  if (cm->comp_pred_mode == HYBRID_PREDICTION)
    for (i = 0; i < COMP_INTER_CONTEXTS; i++)
      if (vp9_read(r, VP9_MODE_UPDATE_PROB))
        vp9_diff_update_prob(r, &cm->fc.comp_inter_prob[i]);

  if (cm->comp_pred_mode != COMP_PREDICTION_ONLY)
    for (i = 0; i < REF_CONTEXTS; i++) {
      if (vp9_read(r, VP9_MODE_UPDATE_PROB))
        vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][0]);
      if (vp9_read(r, VP9_MODE_UPDATE_PROB))
        vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][1]);
    }

  if (cm->comp_pred_mode != SINGLE_PREDICTION_ONLY)
    for (i = 0; i < REF_CONTEXTS; i++)
      if (vp9_read(r, VP9_MODE_UPDATE_PROB))
        vp9_diff_update_prob(r, &cm->fc.comp_ref_prob[i]);
}

635 636
void vp9_prepare_read_mode_info(VP9D_COMP* pbi, vp9_reader *r) {
  VP9_COMMON *const cm = &pbi->common;
637
  int k;
638

639
  // TODO(jkoleszar): does this clear more than MBSKIP_CONTEXTS? Maybe remove.
Deb Mukherjee's avatar
Deb Mukherjee committed
640
  // vpx_memset(cm->fc.mbskip_probs, 0, sizeof(cm->fc.mbskip_probs));
641 642
  for (k = 0; k < MBSKIP_CONTEXTS; ++k)
    if (vp9_read(r, VP9_MODE_UPDATE_PROB))
643
      vp9_diff_update_prob(r, &cm->fc.mbskip_probs[k]);
644

645 646 647 648 649 650 651 652 653 654 655 656 657 658
  if (cm->frame_type != KEY_FRAME && !cm->intra_only) {
    nmv_context *const nmvc = &pbi->common.fc.nmvc;
    MACROBLOCKD *const xd = &pbi->mb;
    int i, j;

    read_inter_mode_probs(&cm->fc, r);

    if (cm->mcomp_filter_type == SWITCHABLE)
      read_switchable_interp_probs(&cm->fc, r);

    for (i = 0; i < INTRA_INTER_CONTEXTS; i++)
      if (vp9_read(r, VP9_MODE_UPDATE_PROB))
        vp9_diff_update_prob(r, &cm->fc.intra_inter_prob[i]);

659
    read_comp_pred(cm, r);
660 661 662 663 664 665 666 667 668 669 670 671 672

    for (j = 0; j < BLOCK_SIZE_GROUPS; j++)
      for (i = 0; i < VP9_INTRA_MODES - 1; ++i)
        if (vp9_read(r, VP9_MODE_UPDATE_PROB))
          vp9_diff_update_prob(r, &cm->fc.y_mode_prob[j][i]);

    for (j = 0; j < NUM_PARTITION_CONTEXTS; ++j)
      for (i = 0; i < PARTITION_TYPES - 1; ++i)
        if (vp9_read(r, VP9_MODE_UPDATE_PROB))
          vp9_diff_update_prob(r, &cm->fc.partition_prob[INTER_FRAME][j][i]);

    read_mv_probs(r, nmvc, xd->allow_high_precision_mv);
  }
673
}
674

675
void vp9_read_mode_info(VP9D_COMP* pbi, int mi_row, int mi_col, vp9_reader *r) {
676
  VP9_COMMON *const cm = &pbi->common;
677
  MACROBLOCKD *const xd = &pbi->mb;
678
  MODE_INFO *mi = xd->mode_info_context;
679
  const BLOCK_SIZE_TYPE bsize = mi->mbmi.sb_type;
Jim Bankoski's avatar
Jim Bankoski committed
680 681 682 683 684
  const int bw = 1 << mi_width_log2(bsize);
  const int bh = 1 << mi_height_log2(bsize);
  const int y_mis = MIN(bh, cm->mi_rows - mi_row);
  const int x_mis = MIN(bw, cm->mi_cols - mi_col);
  int x, y;
685

686
  if (cm->frame_type == KEY_FRAME || cm->intra_only)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
687
    read_intra_frame_mode_info(pbi, mi, mi_row, mi_col, r);
688
  else
Dmitry Kovalev's avatar
Dmitry Kovalev committed
689
    read_inter_frame_mode_info(pbi, mi, mi_row, mi_col, r);
690

Jim Bankoski's avatar
Jim Bankoski committed
691 692 693
  for (y = 0; y < y_mis; y++)
    for (x = !y; x < x_mis; x++)
      mi[y * cm->mode_info_stride + x] = *mi;
694
}