vp9_decodemv.c 23.8 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 39 40 41 42 43 44 45 46 47 48
static MB_PREDICTION_MODE read_intra_mode_y(VP9_COMMON *cm, vp9_reader *r,
                                            int size_group) {
  const MB_PREDICTION_MODE y_mode = read_intra_mode(r,
                                        cm->fc.y_mode_prob[size_group]);
  ++cm->counts.y_mode[size_group][y_mode];
  return y_mode;
}

static MB_PREDICTION_MODE read_intra_mode_uv(VP9_COMMON *cm, vp9_reader *r,
                                             MB_PREDICTION_MODE y_mode) {
  const MB_PREDICTION_MODE uv_mode = read_intra_mode(r,
                                         cm->fc.uv_mode_prob[y_mode]);
  ++cm->counts.uv_mode[y_mode][uv_mode];
  return uv_mode;
}

49 50
static MB_PREDICTION_MODE read_inter_mode(VP9_COMMON *cm, vp9_reader *r,
                                          uint8_t context) {
51 52
  const MB_PREDICTION_MODE mode = treed_read(r, vp9_inter_mode_tree,
                                             cm->fc.inter_mode_probs[context]);
53 54
  ++cm->counts.inter_mode[context][inter_mode_offset(mode)];
  return mode;
55 56
}

57 58
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
59
}
60

61
static TX_SIZE read_selected_tx_size(VP9_COMMON *cm, MACROBLOCKD *xd,
62
                                     BLOCK_SIZE bsize, vp9_reader *r) {
63 64 65
  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]);
66
  if (tx_size != TX_4X4 && bsize >= BLOCK_16X16) {
67
    tx_size += vp9_read(r, tx_probs[1]);
68
    if (tx_size != TX_8X8 && bsize >= BLOCK_32X32)
69
      tx_size += vp9_read(r, tx_probs[2]);
70 71
  }

72
  update_tx_counts(bsize, context, tx_size, &cm->counts.tx);
73
  return tx_size;
74 75
}

76
static TX_SIZE read_tx_size(VP9D_COMP *pbi, TX_MODE tx_mode,
77
                            BLOCK_SIZE bsize, int allow_select,
78
                            vp9_reader *r) {
79 80 81
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;

82
  if (allow_select && tx_mode == TX_MODE_SELECT && bsize >= BLOCK_8X8)
83
    return read_selected_tx_size(cm, xd, bsize, r);
84
  else if (tx_mode >= ALLOW_32X32 && bsize >= BLOCK_32X32)
85
    return TX_32X32;
86
  else if (tx_mode >= ALLOW_16X16 && bsize >= BLOCK_16X16)
87
    return TX_16X16;
88
  else if (tx_mode >= ALLOW_8X8 && bsize >= BLOCK_8X8)
89 90 91 92 93
    return TX_8X8;
  else
    return TX_4X4;
}

94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109
static void set_segment_id(VP9_COMMON *cm, BLOCK_SIZE bsize,
                           int mi_row, int mi_col, int segment_id) {
  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);
  const int xmis = MIN(cm->mi_cols - mi_col, bw);
  const int ymis = MIN(cm->mi_rows - mi_row, bh);
  int x, y;

  assert(segment_id >= 0 && segment_id < MAX_SEGMENTS);

  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;
}

110 111
static int read_intra_segment_id(VP9D_COMP *pbi, int mi_row, int mi_col,
                                 vp9_reader *r) {
112
  MACROBLOCKD *const xd = &pbi->mb;
113
  struct segmentation *const seg = &pbi->common.seg;
114 115
  const BLOCK_SIZE bsize = xd->this_mi->mbmi.sb_type;
  int segment_id;
116

117 118 119 120
  if (!seg->enabled)
    return 0;  // Default for disabled segmentation

  if (!seg->update_map)
121
    return 0;
122

123 124 125
  segment_id = read_segment_id(r, seg);
  set_segment_id(&pbi->common, bsize, mi_row, mi_col, segment_id);
  return segment_id;
126 127 128 129 130 131
}

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;
132
  struct segmentation *const seg = &cm->seg;
133
  const BLOCK_SIZE bsize = xd->this_mi->mbmi.sb_type;
134
  int pred_segment_id, segment_id;
135 136 137 138 139 140 141 142 143 144

  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) {
145
    const vp9_prob pred_prob = vp9_get_pred_prob_seg_id(seg, xd);
146
    const int pred_flag = vp9_read(r, pred_prob);
147
    vp9_set_pred_flag_seg_id(xd, pred_flag);
148 149
    segment_id = pred_flag ? pred_segment_id
                           : read_segment_id(r, seg);
150
  } else {
151
    segment_id = read_segment_id(r, seg);
152
  }
153 154
  set_segment_id(cm, bsize, mi_row, mi_col, segment_id);
  return segment_id;
155 156
}

157
static uint8_t read_skip_coeff(VP9D_COMP *pbi, int segment_id, vp9_reader *r) {
158
  VP9_COMMON *const cm = &pbi->common;
159
  MACROBLOCKD *const xd = &pbi->mb;
160
  int skip_coeff = vp9_segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP);
161
  if (!skip_coeff) {
162
    const int ctx = vp9_get_pred_context_mbskip(xd);
163
    skip_coeff = vp9_read(r, vp9_get_pred_prob_mbskip(cm, xd));
164
    cm->counts.mbskip[ctx][skip_coeff]++;
Deb Mukherjee's avatar
Deb Mukherjee committed
165
  }
166 167
  return skip_coeff;
}
John Koleszar's avatar
John Koleszar committed
168

Dmitry Kovalev's avatar
Dmitry Kovalev committed
169 170
static void read_intra_frame_mode_info(VP9D_COMP *pbi, MODE_INFO *m,
                                       int mi_row, int mi_col, vp9_reader *r) {
171 172 173
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;
  MB_MODE_INFO *const mbmi = &m->mbmi;
174
  const BLOCK_SIZE bsize = mbmi->sb_type;
175 176
  const MODE_INFO *above_mi = xd->mi_8x8[-cm->mode_info_stride];
  const MODE_INFO *left_mi = xd->mi_8x8[-1];
177

178
  mbmi->segment_id = read_intra_segment_id(pbi, mi_row, mi_col, r);
Paul Wilkins's avatar
Paul Wilkins committed
179
  mbmi->skip_coeff = read_skip_coeff(pbi, mbmi->segment_id, r);
180
  mbmi->tx_size = read_tx_size(pbi, cm->tx_mode, bsize, 1, r);
181
  mbmi->ref_frame[0] = INTRA_FRAME;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
182
  mbmi->ref_frame[1] = NONE;
183

184
  if (bsize >= BLOCK_8X8) {
185
    const MB_PREDICTION_MODE A = above_block_mode(m, above_mi, 0);
186
    const MB_PREDICTION_MODE L = xd->left_available ?
187
                                  left_block_mode(m, left_mi, 0) : DC_PRED;
188
    mbmi->mode = read_intra_mode(r, vp9_kf_y_mode_prob[A][L]);
189
  } else {
190
    // Only 4x4, 4x8, 8x4 blocks
Dmitry Kovalev's avatar
Dmitry Kovalev committed
191 192
    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
193
    int idx, idy;
194

Dmitry Kovalev's avatar
Dmitry Kovalev committed
195 196
    for (idy = 0; idy < 2; idy += num_4x4_h) {
      for (idx = 0; idx < 2; idx += num_4x4_w) {
197
        const int ib = idy * 2 + idx;
198
        const MB_PREDICTION_MODE A = above_block_mode(m, above_mi, ib);
199
        const MB_PREDICTION_MODE L = (xd->left_available || idx) ?
200
                                     left_block_mode(m, left_mi, ib) : DC_PRED;
201
        const MB_PREDICTION_MODE b_mode = read_intra_mode(r,
202
                                              vp9_kf_y_mode_prob[A][L]);
203
        m->bmi[ib].as_mode = b_mode;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
204
        if (num_4x4_h == 2)
205
          m->bmi[ib + 2].as_mode = b_mode;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
206
        if (num_4x4_w == 2)
207
          m->bmi[ib + 1].as_mode = b_mode;
208 209
      }
    }
210

211
    mbmi->mode = m->bmi[3].as_mode;
John Koleszar's avatar
John Koleszar committed
212
  }
Dmitry Kovalev's avatar
Dmitry Kovalev committed
213

214
  mbmi->uv_mode = read_intra_mode(r, vp9_kf_uv_mode_prob[mbmi->mode]);
Scott LaVarnway's avatar
Scott LaVarnway committed
215
}
John Koleszar's avatar
John Koleszar committed
216

217 218 219
static int read_mv_component(vp9_reader *r,
                             const nmv_component *mvcomp, int usehp) {
  int mag, d, fr, hp;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
220 221
  const int sign = vp9_read(r, mvcomp->sign);
  const int mv_class = treed_read(r, vp9_mv_class_tree, mvcomp->classes);
222
  const int class0 = mv_class == MV_CLASS_0;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
223

224
  // Integer part
225
  if (class0) {
226
    d = treed_read(r, vp9_mv_class0_tree, mvcomp->class0);
227
  } else {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
228
    int i;
229
    const int n = mv_class + CLASS0_BITS - 1;  // number of bits
Dmitry Kovalev's avatar
Dmitry Kovalev committed
230

231
    d = 0;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
232 233
    for (i = 0; i < n; ++i)
      d |= vp9_read(r, mvcomp->bits[i]) << i;
234 235
  }

236 237
  // Fractional part
  fr = treed_read(r, vp9_mv_fp_tree,
238
                  class0 ? mvcomp->class0_fp[d] : mvcomp->fp);
239 240


241
  // High precision part (if hp is not used, the default value of the hp is 1)
242
  hp = usehp ? vp9_read(r, class0 ? mvcomp->class0_hp : mvcomp->hp)
243
             : 1;
244

245
  // Result
246 247
  mag = vp9_get_mv_mag(mv_class, (d << 3) | (fr << 1) | hp) + 1;
  return sign ? -mag : mag;
248 249
}

250 251
static INLINE void read_mv(vp9_reader *r, MV *mv, const MV *ref,
                           const nmv_context *ctx,
252
                           nmv_context_counts *counts, int allow_hp) {
253
  const MV_JOINT_TYPE j = treed_read(r, vp9_mv_joint_tree, ctx->joints);
254
  const int use_hp = allow_hp && vp9_use_mv_hp(ref);
255 256 257
  MV diff = {0, 0};

  if (mv_joint_vertical(j))
258
    diff.row = read_mv_component(r, &ctx->comps[0], use_hp);
259 260

  if (mv_joint_horizontal(j))
261
    diff.col = read_mv_component(r, &ctx->comps[1], use_hp);
262

263
  vp9_inc_mv(&diff, counts);
264 265 266 267 268

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

Dmitry Kovalev's avatar
Dmitry Kovalev committed
269
static void update_mv(vp9_reader *r, vp9_prob *p) {
270
  if (vp9_read(r, NMV_UPDATE_PROB))
271
    *p = (vp9_read_literal(r, 7) << 1) | 1;
272 273
}

274
static void read_mv_probs(vp9_reader *r, nmv_context *mvc, int allow_hp) {
275
  int i, j, k;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
276 277

  for (j = 0; j < MV_JOINTS - 1; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
278
    update_mv(r, &mvc->joints[j]);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
279

280
  for (i = 0; i < 2; ++i) {
281 282
    nmv_component *const comp = &mvc->comps[i];

Dmitry Kovalev's avatar
Dmitry Kovalev committed
283 284
    update_mv(r, &comp->sign);

Dmitry Kovalev's avatar
Dmitry Kovalev committed
285
    for (j = 0; j < MV_CLASSES - 1; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
286
      update_mv(r, &comp->classes[j]);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
287 288

    for (j = 0; j < CLASS0_SIZE - 1; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
289
      update_mv(r, &comp->class0[j]);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
290 291

    for (j = 0; j < MV_OFFSET_BITS; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
292
      update_mv(r, &comp->bits[j]);
293 294 295
  }

  for (i = 0; i < 2; ++i) {
296 297
    nmv_component *const comp = &mvc->comps[i];

298
    for (j = 0; j < CLASS0_SIZE; ++j)
299
      for (k = 0; k < 3; ++k)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
300
        update_mv(r, &comp->class0_fp[j][k]);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
301 302

    for (j = 0; j < 3; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
303
      update_mv(r, &comp->fp[j]);
304 305
  }

306
  if (allow_hp) {
307
    for (i = 0; i < 2; ++i) {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
308 309
      update_mv(r, &mvc->comps[i].class0_hp);
      update_mv(r, &mvc->comps[i].hp);
310 311 312 313
    }
  }
}

314
// Read the referncence frame
Dmitry Kovalev's avatar
Dmitry Kovalev committed
315 316
static void read_ref_frames(VP9D_COMP *pbi, vp9_reader *r,
                            int segment_id, MV_REFERENCE_FRAME ref_frame[2]) {
317
  VP9_COMMON *const cm = &pbi->common;
John Koleszar's avatar
John Koleszar committed
318
  MACROBLOCKD *const xd = &pbi->mb;
319
  FRAME_CONTEXT *const fc = &cm->fc;
320
  FRAME_COUNTS *const counts = &cm->counts;
321

322 323
  if (vp9_segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) {
    ref_frame[0] = vp9_get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME);
324 325
    ref_frame[1] = NONE;
  } else {
326
    const int comp_ctx = vp9_get_pred_context_comp_inter_inter(cm, xd);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
327
    int is_comp;
John Koleszar's avatar
John Koleszar committed
328

Ronald S. Bultje's avatar
Ronald S. Bultje committed
329
    if (cm->comp_pred_mode == HYBRID_PREDICTION) {
330
      is_comp = vp9_read(r, fc->comp_inter_prob[comp_ctx]);
331
      counts->comp_inter[comp_ctx][is_comp]++;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
332 333 334
    } else {
      is_comp = cm->comp_pred_mode == COMP_PREDICTION_ONLY;
    }
John Koleszar's avatar
John Koleszar committed
335

Ronald S. Bultje's avatar
Ronald S. Bultje committed
336 337
    // FIXME(rbultje) I'm pretty sure this breaks segmentation ref frame coding
    if (is_comp) {
338
      const int fix_ref_idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];
339
      const int ref_ctx = vp9_get_pred_context_comp_ref_p(cm, xd);
340
      const int b = vp9_read(r, fc->comp_ref_prob[ref_ctx]);
341
      counts->comp_ref[ref_ctx][b]++;
342
      ref_frame[fix_ref_idx] = cm->comp_fixed_ref;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
343
      ref_frame[!fix_ref_idx] = cm->comp_var_ref[b];
Dmitry Kovalev's avatar
Dmitry Kovalev committed
344
    } else {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
345 346 347 348 349 350 351 352
      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
353 354
      } else {
        ref_frame[0] = LAST_FRAME;
John Koleszar's avatar
John Koleszar committed
355
      }
Dmitry Kovalev's avatar
Dmitry Kovalev committed
356 357

      ref_frame[1] = NONE;
358
    }
John Koleszar's avatar
John Koleszar committed
359
  }
360
}
John Koleszar's avatar
John Koleszar committed
361

362
static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
363
  int i, j;
364 365
  for (j = 0; j < SWITCHABLE_FILTERS + 1; ++j)
    for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i)
366 367
      vp9_diff_update_prob(r, MODE_UPDATE_PROB,
                           &fc->switchable_interp_prob[j][i]);
368 369
}

370
static void read_inter_mode_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
371 372
  int i, j;
  for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
373
    for (j = 0; j < INTER_MODES - 1; ++j)
374
      vp9_diff_update_prob(r, MODE_UPDATE_PROB, &fc->inter_mode_probs[i][j]);
375
}
John Koleszar's avatar
John Koleszar committed
376

377 378 379
static INLINE COMPPREDMODE_TYPE read_comp_pred_mode(vp9_reader *r) {
  COMPPREDMODE_TYPE mode = vp9_read_bit(r);
  if (mode)
380
    mode += vp9_read_bit(r);
381 382 383
  return mode;
}

384
static INLINE INTERPOLATIONFILTERTYPE read_switchable_filter_type(
385
    VP9D_COMP *pbi, vp9_reader *r) {
386 387
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;
388
  const int ctx = vp9_get_pred_context_switchable_interp(xd);
389 390
  const int type = treed_read(r, vp9_switchable_interp_tree,
                              cm->fc.switchable_interp_prob[ctx]);
391 392
  ++cm->counts.switchable_interp[ctx][type];
  return type;
393 394
}

Dmitry Kovalev's avatar
Dmitry Kovalev committed
395
static void read_intra_block_mode_info(VP9D_COMP *pbi, MODE_INFO *mi,
396
                                  vp9_reader *r) {
397
  VP9_COMMON *const cm = &pbi->common;
398
  MB_MODE_INFO *const mbmi = &mi->mbmi;
399
  const BLOCK_SIZE bsize = mi->mbmi.sb_type;
400

Dmitry Kovalev's avatar
Dmitry Kovalev committed
401 402 403
  mbmi->ref_frame[0] = INTRA_FRAME;
  mbmi->ref_frame[1] = NONE;

404
  if (bsize >= BLOCK_8X8) {
405
    mbmi->mode = read_intra_mode_y(cm, r, size_group_lookup[bsize]);
406
  } else {
407
     // Only 4x4, 4x8, 8x4 blocks
Dmitry Kovalev's avatar
Dmitry Kovalev committed
408 409
     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
410
     int idx, idy;
411

Dmitry Kovalev's avatar
Dmitry Kovalev committed
412 413
     for (idy = 0; idy < 2; idy += num_4x4_h) {
       for (idx = 0; idx < 2; idx += num_4x4_w) {
414
         const int ib = idy * 2 + idx;
415
         const int b_mode = read_intra_mode_y(cm, r, 0);
416
         mi->bmi[ib].as_mode = b_mode;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
417
         if (num_4x4_h == 2)
418
           mi->bmi[ib + 2].as_mode = b_mode;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
419
         if (num_4x4_w == 2)
420
           mi->bmi[ib + 1].as_mode = b_mode;
421 422
      }
    }
423
    mbmi->mode = mi->bmi[3].as_mode;
424 425
  }

426
  mbmi->uv_mode = read_intra_mode_uv(cm, r, mbmi->mode);
427 428
}

Dmitry Kovalev's avatar
Dmitry Kovalev committed
429
static int read_is_inter_block(VP9D_COMP *pbi, int segment_id, vp9_reader *r) {
430 431 432
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;

433 434
  if (vp9_segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) {
    return vp9_get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME) !=
Dmitry Kovalev's avatar
Dmitry Kovalev committed
435
           INTRA_FRAME;
436
  } else {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
437 438 439 440
    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;
441 442 443
  }
}

Dmitry Kovalev's avatar
Dmitry Kovalev committed
444
static void read_inter_block_mode_info(VP9D_COMP *pbi, MODE_INFO *mi,
445
                                       int mi_row, int mi_col, vp9_reader *r) {
446
  VP9_COMMON *const cm = &pbi->common;
447
  MACROBLOCKD *const xd = &pbi->mb;
448
  nmv_context *const nmvc = &cm->fc.nmvc;
449
  MB_MODE_INFO *const mbmi = &mi->mbmi;
450 451
  int_mv *const mv0 = &mbmi->mv[0];
  int_mv *const mv1 = &mbmi->mv[1];
452
  const BLOCK_SIZE bsize = mbmi->sb_type;
453
  const int allow_hp = xd->allow_high_precision_mv;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
454

Yaowu Xu's avatar
Yaowu Xu committed
455
  int_mv nearest[2], nearmv[2], best[2];
456
  uint8_t inter_mode_ctx;
457
  MV_REFERENCE_FRAME ref0;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
458
  int is_compound;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
459

460
  mbmi->uv_mode = DC_PRED;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
461
  read_ref_frames(pbi, r, mbmi->segment_id, mbmi->ref_frame);
462
  ref0 = mbmi->ref_frame[0];
463
  is_compound = has_second_ref(mbmi);
464

465 466
  vp9_find_mv_refs(cm, xd, mi, xd->last_mi, ref0, mbmi->ref_mvs[ref0],
                   mi_row, mi_col);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
467

Paul Wilkins's avatar
Paul Wilkins committed
468
  inter_mode_ctx = mbmi->mode_context[ref0];
469

470
  if (vp9_segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
471
    mbmi->mode = ZEROMV;
472
    assert(bsize >= BLOCK_8X8);
473 474 475 476
  } else {
    if (bsize >= BLOCK_8X8)
      mbmi->mode = read_inter_mode(cm, r, inter_mode_ctx);
  }
477

478
  // nearest, nearby
479
  if (bsize < BLOCK_8X8 || mbmi->mode != ZEROMV) {
Yaowu Xu's avatar
Yaowu Xu committed
480
    vp9_find_best_ref_mvs(xd, mbmi->ref_mvs[ref0], &nearest[0], &nearmv[0]);
481
    best[0].as_int = nearest[0].as_int;
482
  }
483

Dmitry Kovalev's avatar
Dmitry Kovalev committed
484
  if (is_compound) {
485
    const MV_REFERENCE_FRAME ref1 = mbmi->ref_frame[1];
486
    vp9_find_mv_refs(cm, xd, mi, xd->last_mi,
487
                     ref1, mbmi->ref_mvs[ref1], mi_row, mi_col);
488

489
    if (bsize < BLOCK_8X8 || mbmi->mode != ZEROMV) {
Yaowu Xu's avatar
Yaowu Xu committed
490
      vp9_find_best_ref_mvs(xd, mbmi->ref_mvs[ref1], &nearest[1], &nearmv[1]);
491
      best[1].as_int = nearest[1].as_int;
492
    }
493
  }
494

495 496 497 498
  mbmi->interp_filter = cm->mcomp_filter_type == SWITCHABLE
                              ? read_switchable_filter_type(pbi, r)
                              : cm->mcomp_filter_type;

499
  if (bsize < BLOCK_8X8) {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
500 501
    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
502
    int idx, idy;
503
    int b_mode;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
504 505
    for (idy = 0; idy < 2; idy += num_4x4_h) {
      for (idx = 0; idx < 2; idx += num_4x4_w) {
506
        int_mv block[2];
507
        const int j = idy * 2 + idx;
508
        b_mode = read_inter_mode(cm, r, inter_mode_ctx);
509

510
        if (b_mode == NEARESTMV || b_mode == NEARMV) {
Yaowu Xu's avatar
Yaowu Xu committed
511 512
          vp9_append_sub8x8_mvs_for_idx(cm, xd, &nearest[0],
                                        &nearmv[0], j, 0,
513 514
                                        mi_row, mi_col);

Dmitry Kovalev's avatar
Dmitry Kovalev committed
515
          if (is_compound)
Yaowu Xu's avatar
Yaowu Xu committed
516 517
            vp9_append_sub8x8_mvs_for_idx(cm, xd,  &nearest[1],
                                          &nearmv[1], j, 1,
518
                                          mi_row, mi_col);
519
        }
520

521
        switch (b_mode) {
522
          case NEWMV:
523 524
            read_mv(r, &block[0].as_mv, &best[0].as_mv, nmvc, &cm->counts.mv,
                    allow_hp);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
525
            if (is_compound)
526 527
              read_mv(r, &block[1].as_mv, &best[1].as_mv, nmvc, &cm->counts.mv,
                      allow_hp);
528 529
            break;
          case NEARESTMV:
530
            block[0].as_int = nearest[0].as_int;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
531
            if (is_compound)
532
              block[1].as_int = nearest[1].as_int;
533 534
            break;
          case NEARMV:
Yaowu Xu's avatar
Yaowu Xu committed
535
            block[0].as_int = nearmv[0].as_int;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
536
            if (is_compound)
Yaowu Xu's avatar
Yaowu Xu committed
537
              block[1].as_int = nearmv[1].as_int;
538 539
            break;
          case ZEROMV:
540
            block[0].as_int = 0;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
541
            if (is_compound)
542
              block[1].as_int = 0;
543 544 545
            break;
          default:
            assert(!"Invalid inter mode value");
546
        }
547
        mi->bmi[j].as_mv[0].as_int = block[0].as_int;
548 549 550 551
        assert(block[0].as_mv.row < MV_UPP && block[0].as_mv.row > MV_LOW);
        assert(block[0].as_mv.col < MV_UPP && block[0].as_mv.col > MV_LOW);

        if (is_compound) {
552
          mi->bmi[j].as_mv[1].as_int = block[1].as_int;
553 554 555
          assert(block[1].as_mv.row < MV_UPP && block[1].as_mv.row > MV_LOW);
          assert(block[1].as_mv.col < MV_UPP && block[1].as_mv.col > MV_LOW);
        }
Ronald S. Bultje's avatar
Ronald S. Bultje committed
556

Dmitry Kovalev's avatar
Dmitry Kovalev committed
557
        if (num_4x4_h == 2)
558
          mi->bmi[j + 2] = mi->bmi[j];
Dmitry Kovalev's avatar
Dmitry Kovalev committed
559
        if (num_4x4_w == 2)
560
          mi->bmi[j + 1] = mi->bmi[j];
Ronald S. Bultje's avatar
Ronald S. Bultje committed
561
      }
Scott LaVarnway's avatar
Scott LaVarnway committed
562
    }
563

564
    mi->mbmi.mode = b_mode;
565 566
    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
567
  } else {
568 569
    switch (mbmi->mode) {
      case NEARMV:
Yaowu Xu's avatar
Yaowu Xu committed
570
        mv0->as_int = nearmv[0].as_int;
571
        if (is_compound)
Yaowu Xu's avatar
Yaowu Xu committed
572
          mv1->as_int = nearmv[1].as_int;
573 574 575
        break;

      case NEARESTMV:
576
        mv0->as_int = nearest[0].as_int;
577
        if (is_compound)
578
          mv1->as_int = nearest[1].as_int;
579 580 581 582
        break;

      case ZEROMV:
        mv0->as_int = 0;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
583
        if (is_compound)
584 585 586 587
          mv1->as_int = 0;
        break;

      case NEWMV:
588
        read_mv(r, &mv0->as_mv, &best[0].as_mv, nmvc, &cm->counts.mv, allow_hp);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
589
        if (is_compound)
590
          read_mv(r, &mv1->as_mv, &best[1].as_mv, nmvc, &cm->counts.mv,
591
                  allow_hp);
592 593 594 595
        break;
      default:
        assert(!"Invalid inter mode value");
    }
596 597 598 599 600 601
    assert(mv0->as_mv.row < MV_UPP && mv0->as_mv.row > MV_LOW);
    assert(mv0->as_mv.col < MV_UPP && mv0->as_mv.col > MV_LOW);
    if (is_compound) {
      assert(mv1->as_mv.row < MV_UPP && mv1->as_mv.row > MV_LOW);
      assert(mv1->as_mv.col < MV_UPP && mv1->as_mv.col > MV_LOW);
    }
John Koleszar's avatar
John Koleszar committed
602
  }
Scott LaVarnway's avatar
Scott LaVarnway committed
603
}
John Koleszar's avatar
John Koleszar committed
604

Dmitry Kovalev's avatar
Dmitry Kovalev committed
605 606
static void read_inter_frame_mode_info(VP9D_COMP *pbi, MODE_INFO *mi,
                                       int mi_row, int mi_col, vp9_reader *r) {
607 608
  VP9_COMMON *const cm = &pbi->common;
  MB_MODE_INFO *const mbmi = &mi->mbmi;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
609
  int inter_block;
610

Dmitry Kovalev's avatar
Dmitry Kovalev committed
611 612
  mbmi->mv[0].as_int = 0;
  mbmi->mv[1].as_int = 0;
613
  mbmi->segment_id = read_inter_segment_id(pbi, mi_row, mi_col, r);
Paul Wilkins's avatar
Paul Wilkins committed
614
  mbmi->skip_coeff = read_skip_coeff(pbi, mbmi->segment_id, r);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
615
  inter_block = read_is_inter_block(pbi, mbmi->segment_id, r);
616 617
  mbmi->tx_size = read_tx_size(pbi, cm->tx_mode, mbmi->sb_type,
                               !mbmi->skip_coeff || !inter_block, r);
618

Dmitry Kovalev's avatar
Dmitry Kovalev committed
619
  if (inter_block)
620
    read_inter_block_mode_info(pbi, mi, mi_row, mi_col, r);
621
  else
Dmitry Kovalev's avatar
Dmitry Kovalev committed
622
    read_intra_block_mode_info(pbi, mi, r);
623 624
}

625 626 627 628 629 630 631 632
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++)
633
      vp9_diff_update_prob(r, MODE_UPDATE_PROB, &cm->fc.comp_inter_prob[i]);
634 635 636

  if (cm->comp_pred_mode != COMP_PREDICTION_ONLY)
    for (i = 0; i < REF_CONTEXTS; i++) {
637 638
      vp9_diff_update_prob(r, MODE_UPDATE_PROB, &cm->fc.single_ref_prob[i][0]);
      vp9_diff_update_prob(r, MODE_UPDATE_PROB, &cm->fc.single_ref_prob[i][1]);
639 640 641 642
    }

  if (cm->comp_pred_mode != SINGLE_PREDICTION_ONLY)
    for (i = 0; i < REF_CONTEXTS; i++)
643
      vp9_diff_update_prob(r, MODE_UPDATE_PROB, &cm->fc.comp_ref_prob[i]);
644 645
}

646 647
void vp9_prepare_read_mode_info(VP9D_COMP* pbi, vp9_reader *r) {
  VP9_COMMON *const cm = &pbi->common;
648
  int k;
649

650
  // TODO(jkoleszar): does this clear more than MBSKIP_CONTEXTS? Maybe remove.