vp9_decodeframe.c 47.5 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
#include <assert.h>
12
#include <stdlib.h>  // qsort()
John Koleszar's avatar
John Koleszar committed
13

14
#include "./vp9_rtcd.h"
15 16
#include "./vpx_scale_rtcd.h"

17
#include "vpx_mem/vpx_mem.h"
18
#include "vpx_ports/mem_ops.h"
19 20
#include "vpx_scale/vpx_scale.h"

Dmitry Kovalev's avatar
Dmitry Kovalev committed
21
#include "vp9/common/vp9_alloccommon.h"
Ronald S. Bultje's avatar
Ronald S. Bultje committed
22
#include "vp9/common/vp9_common.h"
Yaowu Xu's avatar
Yaowu Xu committed
23
#include "vp9/common/vp9_entropy.h"
24
#include "vp9/common/vp9_entropymode.h"
25
#include "vp9/common/vp9_idct.h"
Dmitry Kovalev's avatar
Dmitry Kovalev committed
26
#include "vp9/common/vp9_pred_common.h"
27
#include "vp9/common/vp9_quant_common.h"
Dmitry Kovalev's avatar
Dmitry Kovalev committed
28 29
#include "vp9/common/vp9_reconintra.h"
#include "vp9/common/vp9_reconinter.h"
30 31
#include "vp9/common/vp9_seg_common.h"
#include "vp9/common/vp9_tile_common.h"
32

Yaowu Xu's avatar
Yaowu Xu committed
33
#include "vp9/decoder/vp9_decodeframe.h"
34 35
#include "vp9/decoder/vp9_detokenize.h"
#include "vp9/decoder/vp9_decodemv.h"
36
#include "vp9/decoder/vp9_decoder.h"
37
#include "vp9/decoder/vp9_dsubexp.h"
38
#include "vp9/decoder/vp9_dthread.h"
39
#include "vp9/decoder/vp9_read_bit_buffer.h"
40
#include "vp9/decoder/vp9_reader.h"
41
#include "vp9/decoder/vp9_thread.h"
42

43
static int is_compound_reference_allowed(const VP9_COMMON *cm) {
44
  int i;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
45
  for (i = 1; i < REFS_PER_FRAME; ++i)
46
    if (cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1])
47 48 49 50 51
      return 1;

  return 0;
}

52
static void setup_compound_reference_mode(VP9_COMMON *cm) {
53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
  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;
    cm->comp_var_ref[1] = GOLDEN_FRAME;
  } else if (cm->ref_frame_sign_bias[LAST_FRAME] ==
                 cm->ref_frame_sign_bias[ALTREF_FRAME]) {
    cm->comp_fixed_ref = GOLDEN_FRAME;
    cm->comp_var_ref[0] = LAST_FRAME;
    cm->comp_var_ref[1] = ALTREF_FRAME;
  } else {
    cm->comp_fixed_ref = LAST_FRAME;
    cm->comp_var_ref[0] = GOLDEN_FRAME;
    cm->comp_var_ref[1] = ALTREF_FRAME;
  }
}

70
static int read_is_valid(const uint8_t *start, size_t len, const uint8_t *end) {
Johann's avatar
Johann committed
71
  return len != 0 && len <= (size_t)(end - start);
72 73
}

74 75 76 77 78
static int decode_unsigned_max(struct vp9_read_bit_buffer *rb, int max) {
  const int data = vp9_rb_read_literal(rb, get_unsigned_bits(max));
  return data > max ? max : data;
}

79 80 81 82 83
static TX_MODE read_tx_mode(vp9_reader *r) {
  TX_MODE tx_mode = vp9_read_literal(r, 2);
  if (tx_mode == ALLOW_32X32)
    tx_mode += vp9_read_bit(r);
  return tx_mode;
84 85
}

86
static void read_tx_mode_probs(struct tx_probs *tx_probs, vp9_reader *r) {
87 88 89
  int i, j;

  for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
90
    for (j = 0; j < TX_SIZES - 3; ++j)
91
      vp9_diff_update_prob(r, &tx_probs->p8x8[i][j]);
92 93

  for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
94
    for (j = 0; j < TX_SIZES - 2; ++j)
95
      vp9_diff_update_prob(r, &tx_probs->p16x16[i][j]);
96 97

  for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
98
    for (j = 0; j < TX_SIZES - 1; ++j)
99
      vp9_diff_update_prob(r, &tx_probs->p32x32[i][j]);
John Koleszar's avatar
John Koleszar committed
100 101
}

102 103
static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
  int i, j;
104
  for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j)
105 106 107 108 109 110 111 112 113 114 115
    for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i)
      vp9_diff_update_prob(r, &fc->switchable_interp_prob[j][i]);
}

static void read_inter_mode_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
  int i, j;
  for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
    for (j = 0; j < INTER_MODES - 1; ++j)
      vp9_diff_update_prob(r, &fc->inter_mode_probs[i][j]);
}

116 117
static REFERENCE_MODE read_frame_reference_mode(const VP9_COMMON *cm,
                                                vp9_reader *r) {
118
  if (is_compound_reference_allowed(cm)) {
119 120 121
    return vp9_read_bit(r) ? (vp9_read_bit(r) ? REFERENCE_MODE_SELECT
                                              : COMPOUND_REFERENCE)
                           : SINGLE_REFERENCE;
122 123 124
  } else {
    return SINGLE_REFERENCE;
  }
125 126
}

127 128
static void read_frame_reference_mode_probs(VP9_COMMON *cm, vp9_reader *r) {
  FRAME_CONTEXT *const fc = &cm->fc;
129
  int i;
130

131
  if (cm->reference_mode == REFERENCE_MODE_SELECT)
132 133
    for (i = 0; i < COMP_INTER_CONTEXTS; ++i)
      vp9_diff_update_prob(r, &fc->comp_inter_prob[i]);
134

135
  if (cm->reference_mode != COMPOUND_REFERENCE)
136 137 138
    for (i = 0; i < REF_CONTEXTS; ++i) {
      vp9_diff_update_prob(r, &fc->single_ref_prob[i][0]);
      vp9_diff_update_prob(r, &fc->single_ref_prob[i][1]);
139 140
    }

141
  if (cm->reference_mode != SINGLE_REFERENCE)
142 143
    for (i = 0; i < REF_CONTEXTS; ++i)
      vp9_diff_update_prob(r, &fc->comp_ref_prob[i]);
144 145
}

146 147 148
static void update_mv_probs(vp9_prob *p, int n, vp9_reader *r) {
  int i;
  for (i = 0; i < n; ++i)
149
    if (vp9_read(r, MV_UPDATE_PROB))
Dmitry Kovalev's avatar
Dmitry Kovalev committed
150
      p[i] = (vp9_read_literal(r, 7) << 1) | 1;
151 152
}

153 154
static void read_mv_probs(nmv_context *ctx, int allow_hp, vp9_reader *r) {
  int i, j;
155

156
  update_mv_probs(ctx->joints, MV_JOINTS - 1, r);
157 158

  for (i = 0; i < 2; ++i) {
159 160 161 162 163
    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);
164 165 166
  }

  for (i = 0; i < 2; ++i) {
167
    nmv_component *const comp_ctx = &ctx->comps[i];
168
    for (j = 0; j < CLASS0_SIZE; ++j)
Dmitry Kovalev's avatar
Dmitry Kovalev committed
169
      update_mv_probs(comp_ctx->class0_fp[j], MV_FP_SIZE - 1, r);
170
    update_mv_probs(comp_ctx->fp, 3, r);
171 172 173 174
  }

  if (allow_hp) {
    for (i = 0; i < 2; ++i) {
175 176 177
      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);
178 179 180 181
    }
  }
}

182
static void setup_plane_dequants(VP9_COMMON *cm, MACROBLOCKD *xd, int q_index) {
John Koleszar's avatar
John Koleszar committed
183
  int i;
184
  xd->plane[0].dequant = cm->y_dequant[q_index];
185

186
  for (i = 1; i < MAX_MB_PLANE; i++)
187
    xd->plane[i].dequant = cm->uv_dequant[q_index];
John Koleszar's avatar
John Koleszar committed
188 189
}

190 191 192
// Allocate storage for each tile column.
// TODO(jzern): when max_threads <= 1 the same storage could be used for each
// tile.
193
static void alloc_tile_storage(VP9D_COMP *pbi, int tile_rows, int tile_cols) {
194
  VP9_COMMON *const cm = &pbi->common;
195
  const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
196
  int i;
197

198 199 200 201 202 203 204 205 206 207 208
  // 2 contexts per 'mi unit', so that we have one context per 4x4 txfm
  // block where mi unit size is 8x8.
  CHECK_MEM_ERROR(cm, pbi->above_context[0],
                  vpx_realloc(pbi->above_context[0],
                              sizeof(*pbi->above_context[0]) * MAX_MB_PLANE *
                              2 * aligned_mi_cols));
  for (i = 1; i < MAX_MB_PLANE; ++i) {
    pbi->above_context[i] = pbi->above_context[0] +
                            i * sizeof(*pbi->above_context[0]) *
                            2 * aligned_mi_cols;
  }
209 210
}

211
static void inverse_transform_block(MACROBLOCKD* xd, int plane, int block,
212 213
                                    TX_SIZE tx_size, uint8_t *dst, int stride,
                                    int eob) {
214
  struct macroblockd_plane *const pd = &xd->plane[plane];
215 216
  if (eob > 0) {
    TX_TYPE tx_type;
217 218
    const int plane_type = pd->plane_type;
    int16_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
219 220
    switch (tx_size) {
      case TX_4X4:
221
        tx_type = get_tx_type_4x4(plane_type, xd, block);
222
        if (tx_type == DCT_DCT)
223
          xd->itxm_add(dqcoeff, dst, stride, eob);
224
        else
225
          vp9_iht4x4_16_add(dqcoeff, dst, stride, tx_type);
226 227
        break;
      case TX_8X8:
228
        tx_type = get_tx_type(plane_type, xd);
229
        vp9_iht8x8_add(tx_type, dqcoeff, dst, stride, eob);
230 231
        break;
      case TX_16X16:
232
        tx_type = get_tx_type(plane_type, xd);
233
        vp9_iht16x16_add(tx_type, dqcoeff, dst, stride, eob);
234 235 236
        break;
      case TX_32X32:
        tx_type = DCT_DCT;
237
        vp9_idct32x32_add(dqcoeff, dst, stride, eob);
238 239
        break;
      default:
James Zern's avatar
James Zern committed
240
        assert(0 && "Invalid transform size");
241 242 243
    }

    if (eob == 1) {
244
      vpx_memset(dqcoeff, 0, 2 * sizeof(dqcoeff[0]));
245
    } else {
246
      if (tx_type == DCT_DCT && tx_size <= TX_16X16 && eob <= 10)
247
        vpx_memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0]));
248
      else if (tx_size == TX_32X32 && eob <= 34)
249
        vpx_memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0]));
250
      else
251
        vpx_memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0]));
252
    }
253 254 255
  }
}

256 257 258 259 260 261 262 263 264 265 266 267
struct intra_args {
  VP9_COMMON *cm;
  MACROBLOCKD *xd;
  vp9_reader *r;
};

static void predict_and_reconstruct_intra_block(int plane, int block,
                                                BLOCK_SIZE plane_bsize,
                                                TX_SIZE tx_size, void *arg) {
  struct intra_args *const args = arg;
  VP9_COMMON *const cm = args->cm;
  MACROBLOCKD *const xd = args->xd;
268
  struct macroblockd_plane *const pd = &xd->plane[plane];
269
  MODE_INFO *const mi = xd->mi_8x8[0];
Dmitry Kovalev's avatar
Dmitry Kovalev committed
270 271
  const MB_PREDICTION_MODE mode = (plane == 0) ? get_y_mode(mi, block)
                                               : mi->mbmi.uv_mode;
272 273 274 275
  int x, y;
  uint8_t *dst;
  txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
  dst = &pd->dst.buf[4 * y * pd->dst.stride + 4 * x];
276

277
  vp9_predict_intra_block(xd, block >> (tx_size << 1),
278
                          b_width_log2(plane_bsize), tx_size, mode,
279 280
                          dst, pd->dst.stride, dst, pd->dst.stride,
                          x, y, plane);
281

282
  if (!mi->mbmi.skip) {
283 284 285 286 287
    const int eob = vp9_decode_block_tokens(cm, xd, plane, block,
                                            plane_bsize, x, y, tx_size,
                                            args->r);
    inverse_transform_block(xd, plane, block, tx_size, dst, pd->dst.stride,
                            eob);
288
  }
289 290
}

291 292 293 294 295 296 297 298 299 300 301 302 303
struct inter_args {
  VP9_COMMON *cm;
  MACROBLOCKD *xd;
  vp9_reader *r;
  int *eobtotal;
};

static void reconstruct_inter_block(int plane, int block,
                                    BLOCK_SIZE plane_bsize,
                                    TX_SIZE tx_size, void *arg) {
  struct inter_args *args = arg;
  VP9_COMMON *const cm = args->cm;
  MACROBLOCKD *const xd = args->xd;
304
  struct macroblockd_plane *const pd = &xd->plane[plane];
305
  int x, y, eob;
306
  txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
307 308
  eob = vp9_decode_block_tokens(cm, xd, plane, block, plane_bsize, x, y,
                                tx_size, args->r);
309 310
  inverse_transform_block(xd, plane, block, tx_size,
                          &pd->dst.buf[4 * y * pd->dst.stride + 4 * x],
311 312
                          pd->dst.stride, eob);
  *args->eobtotal += eob;
313 314
}

315
static void set_offsets(VP9_COMMON *const cm, MACROBLOCKD *const xd,
James Zern's avatar
James Zern committed
316
                        const TileInfo *const tile,
317
                        BLOCK_SIZE bsize, int mi_row, int mi_col) {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
318
  const int bw = num_8x8_blocks_wide_lookup[bsize];
319 320 321
  const int bh = num_8x8_blocks_high_lookup[bsize];
  const int x_mis = MIN(bw, cm->mi_cols - mi_col);
  const int y_mis = MIN(bh, cm->mi_rows - mi_row);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
322
  const int offset = mi_row * cm->mode_info_stride + mi_col;
323
  int x, y;
324 325 326

  xd->mi_8x8 = cm->mi_grid_visible + offset;
  xd->prev_mi_8x8 = cm->prev_mi_grid_visible + offset;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
327
  xd->mi_8x8[0] = &cm->mi[offset];
328 329 330 331 332
  xd->mi_8x8[0]->mbmi.sb_type = bsize;
  for (y = 0; y < y_mis; ++y)
    for (x = !y; x < x_mis; ++x)
      xd->mi_8x8[y * cm->mode_info_stride + x] = xd->mi_8x8[0];

333
  set_skip_context(xd, xd->above_context, xd->left_context, mi_row, mi_col);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
334

335 336
  // 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
James Zern's avatar
James Zern committed
337
  set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
338

339
  vp9_setup_dst_planes(xd, get_frame_new_buffer(cm), mi_row, mi_col);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
340
}
John Koleszar's avatar
John Koleszar committed
341

342 343
static void set_ref(VP9_COMMON *const cm, MACROBLOCKD *const xd,
                    int idx, int mi_row, int mi_col) {
344
  MB_MODE_INFO *const mbmi = &xd->mi_8x8[0]->mbmi;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
345 346 347
  RefBuffer *ref_buffer = &cm->frame_refs[mbmi->ref_frame[idx] - LAST_FRAME];
  xd->block_refs[idx] = ref_buffer;
  if (!vp9_is_valid_scale(&ref_buffer->sf))
348 349
    vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
                       "Invalid scale factors");
350 351
  vp9_setup_pre_planes(xd, idx, ref_buffer->buf, mi_row, mi_col,
                       &ref_buffer->sf);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
352
  xd->corrupted |= ref_buffer->buf->corrupted;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
353
}
John Koleszar's avatar
John Koleszar committed
354

355 356 357 358
static void decode_block(VP9_COMMON *const cm, MACROBLOCKD *const xd,
                         const TileInfo *const tile,
                         int mi_row, int mi_col,
                         vp9_reader *r, BLOCK_SIZE bsize) {
359
  const int less8x8 = bsize < BLOCK_8X8;
360
  MB_MODE_INFO *mbmi;
361

James Zern's avatar
James Zern committed
362 363
  set_offsets(cm, xd, tile, bsize, mi_row, mi_col);
  vp9_read_mode_info(cm, xd, tile, mi_row, mi_col, r);
364

365
  if (less8x8)
366
    bsize = BLOCK_8X8;
367 368

  // Has to be called after set_offsets
369
  mbmi = &xd->mi_8x8[0]->mbmi;
370

371
  if (mbmi->skip) {
372
    reset_skip_context(xd, bsize);
373
  } else {
374 375 376 377
    if (cm->seg.enabled)
      setup_plane_dequants(cm, xd, vp9_get_qindex(&cm->seg, mbmi->segment_id,
                                                  cm->base_qindex));
  }
378

379
  if (!is_inter_block(mbmi)) {
380
    struct intra_args arg = { cm, xd, r };
381 382
    vp9_foreach_transformed_block(xd, bsize,
                                  predict_and_reconstruct_intra_block, &arg);
383 384
  } else {
    // Setup
385
    set_ref(cm, xd, 0, mi_row, mi_col);
Dmitry Kovalev's avatar
Dmitry Kovalev committed
386
    if (has_second_ref(mbmi))
387
      set_ref(cm, xd, 1, mi_row, mi_col);
388

389
    xd->interp_kernel = vp9_get_interp_kernel(mbmi->interp_filter);
390 391

    // Prediction
392
    vp9_dec_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);
393

394
    // Reconstruction
395
    if (!mbmi->skip) {
396
      int eobtotal = 0;
397
      struct inter_args arg = { cm, xd, r, &eobtotal };
398
      vp9_foreach_transformed_block(xd, bsize, reconstruct_inter_block, &arg);
399
      if (!less8x8 && eobtotal == 0)
400
        mbmi->skip = 1;  // skip loopfilter
401
    }
402
  }
403

404
  xd->corrupted |= vp9_reader_has_error(r);
405 406
}

407 408
static PARTITION_TYPE read_partition(VP9_COMMON *cm, MACROBLOCKD *xd, int hbs,
                                     int mi_row, int mi_col, BLOCK_SIZE bsize,
409
                                     vp9_reader *r) {
410 411 412 413 414 415 416
  const int ctx = partition_plane_context(xd->above_seg_context,
                                          xd->left_seg_context,
                                          mi_row, mi_col, bsize);
  const vp9_prob *const probs = get_partition_probs(cm, ctx);
  const int has_rows = (mi_row + hbs) < cm->mi_rows;
  const int has_cols = (mi_col + hbs) < cm->mi_cols;
  PARTITION_TYPE p;
417 418

  if (has_rows && has_cols)
419
    p = vp9_read_tree(r, vp9_partition_tree, probs);
420
  else if (!has_rows && has_cols)
421
    p = vp9_read(r, probs[1]) ? PARTITION_SPLIT : PARTITION_HORZ;
422
  else if (has_rows && !has_cols)
423
    p = vp9_read(r, probs[2]) ? PARTITION_SPLIT : PARTITION_VERT;
424
  else
425 426 427 428 429 430
    p = PARTITION_SPLIT;

  if (!cm->frame_parallel_decoding_mode)
    ++cm->counts.partition[ctx][p];

  return p;
431 432
}

433 434 435 436
static void decode_partition(VP9_COMMON *const cm, MACROBLOCKD *const xd,
                             const TileInfo *const tile,
                             int mi_row, int mi_col,
                             vp9_reader* r, BLOCK_SIZE bsize) {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
437
  const int hbs = num_8x8_blocks_wide_lookup[bsize] / 2;
438
  PARTITION_TYPE partition;
439
  BLOCK_SIZE subsize;
440

441
  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols)
442 443
    return;

444
  partition = read_partition(cm, xd, hbs, mi_row, mi_col, bsize, r);
445 446
  subsize = get_subsize(bsize, partition);
  if (subsize < BLOCK_8X8) {
447
    decode_block(cm, xd, tile, mi_row, mi_col, r, subsize);
448 449 450
  } else {
    switch (partition) {
      case PARTITION_NONE:
451
        decode_block(cm, xd, tile, mi_row, mi_col, r, subsize);
452 453
        break;
      case PARTITION_HORZ:
454
        decode_block(cm, xd, tile, mi_row, mi_col, r, subsize);
455
        if (mi_row + hbs < cm->mi_rows)
456
          decode_block(cm, xd, tile, mi_row + hbs, mi_col, r, subsize);
457 458
        break;
      case PARTITION_VERT:
459
        decode_block(cm, xd, tile, mi_row, mi_col, r, subsize);
460
        if (mi_col + hbs < cm->mi_cols)
461
          decode_block(cm, xd, tile, mi_row, mi_col + hbs, r, subsize);
462 463
        break;
      case PARTITION_SPLIT:
464 465 466 467
        decode_partition(cm, xd, tile, mi_row,       mi_col,       r, subsize);
        decode_partition(cm, xd, tile, mi_row,       mi_col + hbs, r, subsize);
        decode_partition(cm, xd, tile, mi_row + hbs, mi_col,       r, subsize);
        decode_partition(cm, xd, tile, mi_row + hbs, mi_col + hbs, r, subsize);
468 469
        break;
      default:
James Zern's avatar
James Zern committed
470
        assert(0 && "Invalid partition type");
471
    }
472
  }
473

474
  // update partition context
475
  if (bsize >= BLOCK_8X8 &&
476
      (bsize == BLOCK_8X8 || partition != PARTITION_SPLIT))
477
    update_partition_context(xd->above_seg_context, xd->left_seg_context,
478
                             mi_row, mi_col, subsize, bsize);
479 480
}

481 482 483 484
static void setup_token_decoder(const uint8_t *data,
                                const uint8_t *data_end,
                                size_t read_size,
                                struct vpx_internal_error_info *error_info,
485
                                vp9_reader *r) {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
486 487 488
  // Validate the calculated partition length. If the buffer
  // described by the partition can't be fully read, then restrict
  // it to the portion that can be (for EC mode) or throw an error.
489
  if (!read_is_valid(data, read_size, data_end))
490
    vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
491
                       "Truncated packet or corrupt tile length");
John Koleszar's avatar
John Koleszar committed
492

493
  if (vp9_reader_init(r, data, read_size))
494
    vpx_internal_error(error_info, VPX_CODEC_MEM_ERROR,
John Koleszar's avatar
John Koleszar committed
495
                       "Failed to allocate bool decoder %d", 1);
John Koleszar's avatar
John Koleszar committed
496 497
}

498
static void read_coef_probs_common(vp9_coeff_probs_model *coef_probs,
499
                                   vp9_reader *r) {
500 501 502
  int i, j, k, l, m;

  if (vp9_read_bit(r))
503
    for (i = 0; i < PLANE_TYPES; ++i)
504 505 506 507 508
      for (j = 0; j < REF_TYPES; ++j)
        for (k = 0; k < COEF_BANDS; ++k)
          for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l)
            for (m = 0; m < UNCONSTRAINED_NODES; ++m)
              vp9_diff_update_prob(r, &coef_probs[i][j][k][l][m]);
509
}
510

511
static void read_coef_probs(FRAME_CONTEXT *fc, TX_MODE tx_mode,
512
                            vp9_reader *r) {
Yaowu Xu's avatar
Yaowu Xu committed
513 514 515 516
    const TX_SIZE max_tx_size = tx_mode_to_biggest_tx_size[tx_mode];
    TX_SIZE tx_size;
    for (tx_size = TX_4X4; tx_size <= max_tx_size; ++tx_size)
      read_coef_probs_common(fc->coef_probs[tx_size], r);
517 518
}

519 520
static void setup_segmentation(struct segmentation *seg,
                               struct vp9_read_bit_buffer *rb) {
521 522
  int i, j;

523 524
  seg->update_map = 0;
  seg->update_data = 0;
525

526 527
  seg->enabled = vp9_rb_read_bit(rb);
  if (!seg->enabled)
528 529 530
    return;

  // Segmentation map update
531 532
  seg->update_map = vp9_rb_read_bit(rb);
  if (seg->update_map) {
Paul Wilkins's avatar
Paul Wilkins committed
533
    for (i = 0; i < SEG_TREE_PROBS; i++)
534 535
      seg->tree_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)
                                               : MAX_PROB;
536

537 538
    seg->temporal_update = vp9_rb_read_bit(rb);
    if (seg->temporal_update) {
539
      for (i = 0; i < PREDICTION_PROBS; i++)
540 541
        seg->pred_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)
                                                 : MAX_PROB;
542 543
    } else {
      for (i = 0; i < PREDICTION_PROBS; i++)
544
        seg->pred_probs[i] = MAX_PROB;
545
    }
546
  }
547

548
  // Segmentation data update
549 550 551
  seg->update_data = vp9_rb_read_bit(rb);
  if (seg->update_data) {
    seg->abs_delta = vp9_rb_read_bit(rb);
552

553
    vp9_clearall_segfeatures(seg);
554

Paul Wilkins's avatar
Paul Wilkins committed
555
    for (i = 0; i < MAX_SEGMENTS; i++) {
556 557
      for (j = 0; j < SEG_LVL_MAX; j++) {
        int data = 0;
558
        const int feature_enabled = vp9_rb_read_bit(rb);
559
        if (feature_enabled) {
560
          vp9_enable_segfeature(seg, i, j);
561
          data = decode_unsigned_max(rb, vp9_seg_feature_data_max(j));
562
          if (vp9_is_segfeature_signed(j))
563
            data = vp9_rb_read_bit(rb) ? -data : data;
564
        }
565
        vp9_set_segdata(seg, i, j, data);
566 567 568 569 570
      }
    }
  }
}

571 572 573 574
static void setup_loopfilter(struct loopfilter *lf,
                             struct vp9_read_bit_buffer *rb) {
  lf->filter_level = vp9_rb_read_literal(rb, 6);
  lf->sharpness_level = vp9_rb_read_literal(rb, 3);
575 576 577

  // Read in loop filter deltas applied at the MB level based on mode or ref
  // frame.
578
  lf->mode_ref_delta_update = 0;
579

580 581 582 583
  lf->mode_ref_delta_enabled = vp9_rb_read_bit(rb);
  if (lf->mode_ref_delta_enabled) {
    lf->mode_ref_delta_update = vp9_rb_read_bit(rb);
    if (lf->mode_ref_delta_update) {
584 585
      int i;

586 587
      for (i = 0; i < MAX_REF_LF_DELTAS; i++)
        if (vp9_rb_read_bit(rb))
588
          lf->ref_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
589

590 591
      for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
        if (vp9_rb_read_bit(rb))
592
          lf->mode_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
593 594 595 596
    }
  }
}

597 598
static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) {
  const int old = *delta_q;
599
  *delta_q = vp9_rb_read_bit(rb) ? vp9_rb_read_signed_literal(rb, 4) : 0;
600 601
  return old != *delta_q;
}
602

603 604
static void setup_quantization(VP9_COMMON *const cm, MACROBLOCKD *const xd,
                               struct vp9_read_bit_buffer *rb) {
605
  int update = 0;
606

607 608 609 610 611 612
  cm->base_qindex = vp9_rb_read_literal(rb, QINDEX_BITS);
  update |= read_delta_q(rb, &cm->y_dc_delta_q);
  update |= read_delta_q(rb, &cm->uv_dc_delta_q);
  update |= read_delta_q(rb, &cm->uv_ac_delta_q);
  if (update)
    vp9_init_dequantizer(cm);
613 614 615 616 617

  xd->lossless = cm->base_qindex == 0 &&
                 cm->y_dc_delta_q == 0 &&
                 cm->uv_dc_delta_q == 0 &&
                 cm->uv_ac_delta_q == 0;
618

619
  xd->itxm_add = xd->lossless ? vp9_iwht4x4_add : vp9_idct4x4_add;
620 621
}

622 623 624 625 626
static INTERP_FILTER read_interp_filter(struct vp9_read_bit_buffer *rb) {
  const INTERP_FILTER literal_to_filter[] = { EIGHTTAP_SMOOTH,
                                              EIGHTTAP,
                                              EIGHTTAP_SHARP,
                                              BILINEAR };
627
  return vp9_rb_read_bit(rb) ? SWITCHABLE
628
                             : literal_to_filter[vp9_rb_read_literal(rb, 2)];
629 630
}

631
static void read_frame_size(struct vp9_read_bit_buffer *rb,
632
                            int *width, int *height) {
633 634
  const int w = vp9_rb_read_literal(rb, 16) + 1;
  const int h = vp9_rb_read_literal(rb, 16) + 1;
635 636
  *width = w;
  *height = h;
637 638
}

639
static void setup_display_size(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
640 641 642
  cm->display_width = cm->width;
  cm->display_height = cm->height;
  if (vp9_rb_read_bit(rb))
643
    read_frame_size(rb, &cm->display_width, &cm->display_height);
644
}
645

646 647
static void apply_frame_size(VP9D_COMP *pbi, int width, int height) {
  VP9_COMMON *cm = &pbi->common;
648

649
  if (cm->width != width || cm->height != height) {
650 651 652 653 654
    // Change in frame size.
    // TODO(agrange) Don't test width/height, check overall size.
    if (width > cm->width || height > cm->height) {
      // Rescale frame buffers only if they're not big enough already.
      if (vp9_resize_frame_buffers(cm, width, height))
655
        vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
656 657 658
                           "Failed to allocate frame buffers");
    }

659 660
    cm->width = width;
    cm->height = height;
661

662
    vp9_update_frame_size(cm);
663
  }
664

665 666 667 668 669 670 671 672
  if (vp9_realloc_frame_buffer(
          get_frame_new_buffer(cm), cm->width, cm->height,
          cm->subsampling_x, cm->subsampling_y, VP9_DEC_BORDER_IN_PIXELS,
          &cm->frame_bufs[cm->new_fb_idx].raw_frame_buffer, cm->get_fb_cb,
          cm->cb_priv)) {
    vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
                       "Failed to allocate frame buffer");
  }
673 674
}

675 676 677
static void setup_frame_size(VP9D_COMP *pbi,
                             struct vp9_read_bit_buffer *rb) {
  int width, height;
678
  read_frame_size(rb, &width, &height);
679
  apply_frame_size(pbi, width, height);
680
  setup_display_size(&pbi->common, rb);
681 682
}

683 684 685 686 687 688
static void setup_frame_size_with_refs(VP9D_COMP *pbi,
                                       struct vp9_read_bit_buffer *rb) {
  VP9_COMMON *const cm = &pbi->common;

  int width, height;
  int found = 0, i;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
689
  for (i = 0; i < REFS_PER_FRAME; ++i) {
690
    if (vp9_rb_read_bit(rb)) {
Dmitry Kovalev's avatar
Dmitry Kovalev committed
691 692 693
      YV12_BUFFER_CONFIG *const buf = cm->frame_refs[i].buf;
      width = buf->y_crop_width;
      height = buf->y_crop_height;
694 695 696 697 698 699
      found = 1;
      break;
    }
  }

  if (!found)
700
    read_frame_size(rb, &width, &height);
701

Yaowu Xu's avatar
Yaowu Xu committed
702
  if (width <= 0 || height <= 0)
703 704 705
    vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
                       "Referenced frame with invalid size");

706
  apply_frame_size(pbi, width, height);
707
  setup_display_size(cm, rb);
708 709
}

710
static void setup_tile_context(VP9D_COMP *const pbi, MACROBLOCKD *const xd,
711
                               int tile_row, int tile_col) {
712
  int i;
713

Dmitry Kovalev's avatar
Dmitry Kovalev committed
714
  for (i = 0; i < MAX_MB_PLANE; ++i)
715
    xd->above_context[i] = pbi->above_context[i];
Dmitry Kovalev's avatar
Dmitry Kovalev committed
716