vp9_blockd.h 22.9 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 13
#ifndef VP9_COMMON_VP9_BLOCKD_H_
#define VP9_COMMON_VP9_BLOCKD_H_
John Koleszar's avatar
John Koleszar committed
14

15
#include "./vpx_config.h"
16 17

#include "vpx_ports/mem.h"
John Koleszar's avatar
John Koleszar committed
18
#include "vpx_scale/yv12config.h"
19 20 21

#include "vp9/common/vp9_common.h"
#include "vp9/common/vp9_common_data.h"
22
#include "vp9/common/vp9_convolve.h"
23
#include "vp9/common/vp9_enums.h"
24
#include "vp9/common/vp9_mv.h"
25
#include "vp9/common/vp9_seg_common.h"
26
#include "vp9/common/vp9_treecoder.h"
John Koleszar's avatar
John Koleszar committed
27

28
#define BLOCK_SIZE_GROUPS   4
29 30
#define MBSKIP_CONTEXTS 3

31
/* Segment Feature Masks */
Paul Wilkins's avatar
Paul Wilkins committed
32
#define MAX_MV_REF_CANDIDATES 2
John Koleszar's avatar
John Koleszar committed
33

Ronald S. Bultje's avatar
Ronald S. Bultje committed
34 35 36 37
#define INTRA_INTER_CONTEXTS 4
#define COMP_INTER_CONTEXTS 5
#define REF_CONTEXTS 5

Dmitry Kovalev's avatar
Dmitry Kovalev committed
38
typedef enum {
39
  PLANE_TYPE_Y_WITH_DC,
40
  PLANE_TYPE_UV,
41
} PLANE_TYPE;
Scott LaVarnway's avatar
Scott LaVarnway committed
42

43
typedef char ENTROPY_CONTEXT;
John Koleszar's avatar
John Koleszar committed
44

45 46
typedef char PARTITION_CONTEXT;

47 48 49 50
static INLINE int combine_entropy_contexts(ENTROPY_CONTEXT a,
                                           ENTROPY_CONTEXT b) {
  return (a != 0) + (b != 0);
}
John Koleszar's avatar
John Koleszar committed
51

John Koleszar's avatar
John Koleszar committed
52 53
typedef enum {
  KEY_FRAME = 0,
54 55
  INTER_FRAME = 1,
  NUM_FRAME_TYPES,
John Koleszar's avatar
John Koleszar committed
56 57
} FRAME_TYPE;

Dmitry Kovalev's avatar
Dmitry Kovalev committed
58
typedef enum {
59 60 61 62 63
  EIGHTTAP = 0,
  EIGHTTAP_SMOOTH = 1,
  EIGHTTAP_SHARP = 2,
  BILINEAR = 3,
  SWITCHABLE = 4  /* should be the last one */
64 65
} INTERPOLATIONFILTERTYPE;

Dmitry Kovalev's avatar
Dmitry Kovalev committed
66
typedef enum {
67 68 69 70 71 72 73 74 75 76
  DC_PRED,         // Average of above and left pixels
  V_PRED,          // Vertical
  H_PRED,          // Horizontal
  D45_PRED,        // Directional 45  deg = round(arctan(1/1) * 180/pi)
  D135_PRED,       // Directional 135 deg = 180 - 45
  D117_PRED,       // Directional 117 deg = 180 - 63
  D153_PRED,       // Directional 153 deg = 180 - 27
  D27_PRED,        // Directional 27  deg = round(arctan(1/2) * 180/pi)
  D63_PRED,        // Directional 63  deg = round(arctan(2/1) * 180/pi)
  TM_PRED,         // True-motion
John Koleszar's avatar
John Koleszar committed
77 78 79 80 81
  NEARESTMV,
  NEARMV,
  ZEROMV,
  NEWMV,
  MB_MODE_COUNT
John Koleszar's avatar
John Koleszar committed
82 83
} MB_PREDICTION_MODE;

84 85 86 87
static INLINE int is_intra_mode(MB_PREDICTION_MODE mode) {
  return mode <= TM_PRED;
}

88
static INLINE int is_inter_mode(MB_PREDICTION_MODE mode) {
Ronald S. Bultje's avatar
Ronald S. Bultje committed
89
  return mode >= NEARESTMV && mode <= NEWMV;
90 91
}

92
#define VP9_INTRA_MODES (TM_PRED + 1)
John Koleszar's avatar
John Koleszar committed
93

94
#define VP9_INTER_MODES (1 + NEWMV - NEARESTMV)
John Koleszar's avatar
John Koleszar committed
95

96 97 98 99
static INLINE int inter_mode_offset(MB_PREDICTION_MODE mode) {
  return (mode - NEARESTMV);
}

John Koleszar's avatar
John Koleszar committed
100 101 102 103
/* For keyframes, intra block modes are predicted by the (already decoded)
   modes for the Y blocks to the left and above us; for interframes, there
   is a single probability table. */

John Koleszar's avatar
John Koleszar committed
104
union b_mode_info {
105
  MB_PREDICTION_MODE as_mode;
106
  int_mv as_mv[2];  // first, second inter predictor motion vectors
107
};
John Koleszar's avatar
John Koleszar committed
108

John Koleszar's avatar
John Koleszar committed
109
typedef enum {
110
  NONE = -1,
John Koleszar's avatar
John Koleszar committed
111 112 113 114 115
  INTRA_FRAME = 0,
  LAST_FRAME = 1,
  GOLDEN_FRAME = 2,
  ALTREF_FRAME = 3,
  MAX_REF_FRAMES = 4
John Koleszar's avatar
John Koleszar committed
116 117
} MV_REFERENCE_FRAME;

118
static INLINE int b_width_log2(BLOCK_SIZE_TYPE sb_type) {
119
  return b_width_log2_lookup[sb_type];
120
}
121
static INLINE int b_height_log2(BLOCK_SIZE_TYPE sb_type) {
122
  return b_height_log2_lookup[sb_type];
123
}
Ronald S. Bultje's avatar
Ronald S. Bultje committed
124

125
static INLINE int mi_width_log2(BLOCK_SIZE_TYPE sb_type) {
Jim Bankoski's avatar
Jim Bankoski committed
126
  return mi_width_log2_lookup[sb_type];
127 128
}

129
static INLINE int mi_height_log2(BLOCK_SIZE_TYPE sb_type) {
Jim Bankoski's avatar
Jim Bankoski committed
130
  return mi_height_log2_lookup[sb_type];
131 132
}

John Koleszar's avatar
John Koleszar committed
133 134
typedef struct {
  MB_PREDICTION_MODE mode, uv_mode;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
135
  MV_REFERENCE_FRAME ref_frame[2];
John Koleszar's avatar
John Koleszar committed
136
  TX_SIZE txfm_size;
137
  int_mv mv[2]; // for each reference frame used
Paul Wilkins's avatar
Paul Wilkins committed
138
  int_mv ref_mvs[MAX_REF_FRAMES][MAX_MV_REF_CANDIDATES];
Deb Mukherjee's avatar
Deb Mukherjee committed
139
  int_mv best_mv, best_second_mv;
Paul Wilkins's avatar
Paul Wilkins committed
140

141
  uint8_t mb_mode_context[MAX_REF_FRAMES];
Paul Wilkins's avatar
Paul Wilkins committed
142

John Koleszar's avatar
John Koleszar committed
143
  unsigned char mb_skip_coeff;                                /* does this mb has coefficients at all, 1=no coefficients, 0=need decode tokens */
144
  unsigned char segment_id;           // Segment id for current frame
John Koleszar's avatar
John Koleszar committed
145 146 147 148 149 150 151 152

  // Flags used for prediction status of various bistream signals
  unsigned char seg_id_predicted;

  // Indicates if the mb is part of the image (1) vs border (0)
  // This can be useful in determining whether the MB provides
  // a valid predictor
  unsigned char mb_in_image;
153

154
  INTERPOLATIONFILTERTYPE interp_filter;
155

Ronald S. Bultje's avatar
Ronald S. Bultje committed
156
  BLOCK_SIZE_TYPE sb_type;
John Koleszar's avatar
John Koleszar committed
157 158
} MB_MODE_INFO;

John Koleszar's avatar
John Koleszar committed
159 160
typedef struct {
  MB_MODE_INFO mbmi;
161
  union b_mode_info bmi[4];
John Koleszar's avatar
John Koleszar committed
162 163
} MODE_INFO;

164 165 166 167 168
static int is_inter_block(const MB_MODE_INFO *mbmi) {
  return mbmi->ref_frame[0] > INTRA_FRAME;
}


169 170 171 172 173
enum mv_precision {
  MV_PRECISION_Q3,
  MV_PRECISION_Q4
};

174
#define VP9_REF_SCALE_SHIFT 14
175
#define VP9_REF_NO_SCALE (1 << VP9_REF_SCALE_SHIFT)
176

177
struct scale_factors {
178 179
  int x_scale_fp;   // horizontal fixed point scale factor
  int y_scale_fp;   // vertical fixed point scale factor
180
  int x_offset_q4;
181
  int x_step_q4;
182
  int y_offset_q4;
183
  int y_step_q4;
184 185 186 187

  int (*scale_value_x)(int val, const struct scale_factors *scale);
  int (*scale_value_y)(int val, const struct scale_factors *scale);
  void (*set_scaled_offsets)(struct scale_factors *scale, int row, int col);
188 189
  MV32 (*scale_mv_q3_to_q4)(const MV *mv, const struct scale_factors *scale);
  MV32 (*scale_mv_q4)(const MV *mv, const struct scale_factors *scale);
190

191
  convolve_fn_t predict[2][2][2];  // horiz, vert, avg
192 193
};

194 195 196
#if CONFIG_ALPHA
enum { MAX_MB_PLANE = 4 };
#else
197
enum { MAX_MB_PLANE = 3 };
198
#endif
199

200 201 202 203 204
struct buf_2d {
  uint8_t *buf;
  int stride;
};

205
struct macroblockd_plane {
206 207
  DECLARE_ALIGNED(16, int16_t,  qcoeff[64 * 64]);
  DECLARE_ALIGNED(16, int16_t,  dqcoeff[64 * 64]);
John Koleszar's avatar
John Koleszar committed
208
  DECLARE_ALIGNED(16, uint16_t, eobs[256]);
209 210 211
  PLANE_TYPE plane_type;
  int subsampling_x;
  int subsampling_y;
212 213
  struct buf_2d dst;
  struct buf_2d pre[2];
214
  int16_t *dequant;
215 216
  ENTROPY_CONTEXT *above_context;
  ENTROPY_CONTEXT *left_context;
217 218 219 220
};

#define BLOCK_OFFSET(x, i, n) ((x) + (i) * (n))

221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241
#define MAX_REF_LF_DELTAS       4
#define MAX_MODE_LF_DELTAS      2

struct loopfilter {
  int filter_level;

  int sharpness_level;
  int last_sharpness_level;

  uint8_t mode_ref_delta_enabled;
  uint8_t mode_ref_delta_update;

  // 0 = Intra, Last, GF, ARF
  signed char ref_deltas[MAX_REF_LF_DELTAS];
  signed char last_ref_deltas[MAX_REF_LF_DELTAS];

  // 0 = ZERO_MV, MV
  signed char mode_deltas[MAX_MODE_LF_DELTAS];
  signed char last_mode_deltas[MAX_MODE_LF_DELTAS];
};

Jim Bankoski's avatar
Jim Bankoski committed
242
typedef struct macroblockd {
243
  struct macroblockd_plane plane[MAX_MB_PLANE];
244

245
  struct scale_factors scale_factor[2];
John Koleszar's avatar
John Koleszar committed
246

John Koleszar's avatar
John Koleszar committed
247 248 249
  MODE_INFO *prev_mode_info_context;
  MODE_INFO *mode_info_context;
  int mode_info_stride;
John Koleszar's avatar
John Koleszar committed
250

John Koleszar's avatar
John Koleszar committed
251 252
  int up_available;
  int left_available;
253
  int right_available;
John Koleszar's avatar
John Koleszar committed
254

255
  struct segmentation seg;
256
  struct loopfilter lf;
257

258 259 260 261
  // partition contexts
  PARTITION_CONTEXT *above_seg_context;
  PARTITION_CONTEXT *left_seg_context;

John Koleszar's avatar
John Koleszar committed
262 263 264 265 266 267
  /* Distance of MB away from frame edges */
  int mb_to_left_edge;
  int mb_to_right_edge;
  int mb_to_top_edge;
  int mb_to_bottom_edge;

Yaowu Xu's avatar
Yaowu Xu committed
268
  int lossless;
269
  /* Inverse transform function pointers. */
Scott LaVarnway's avatar
Scott LaVarnway committed
270 271
  void (*inv_txm4x4_1_add)(int16_t *input, uint8_t *dest, int stride);
  void (*inv_txm4x4_add)(int16_t *input, uint8_t *dest, int stride);
272
  void (*itxm_add)(int16_t *input, uint8_t *dest, int stride, int eob);
273

274
  struct subpix_fn_table  subpix;
275

John Koleszar's avatar
John Koleszar committed
276
  int allow_high_precision_mv;
John Koleszar's avatar
John Koleszar committed
277

John Koleszar's avatar
John Koleszar committed
278
  int corrupted;
279

280 281 282 283 284
  unsigned char sb_index;   // index of 32x32 block inside the 64x64 block
  unsigned char mb_index;   // index of 16x16 block inside the 32x32 block
  unsigned char b_index;    // index of 8x8 block inside the 16x16 block
  unsigned char ab_index;   // index of 4x4 block inside the 8x8 block

Jingning Han's avatar
Jingning Han committed
285 286
  int q_index;

John Koleszar's avatar
John Koleszar committed
287 288
} MACROBLOCKD;

289
static INLINE unsigned char *get_sb_index(MACROBLOCKD *xd, BLOCK_SIZE_TYPE subsize) {
290
  switch (subsize) {
291 292 293 294
    case BLOCK_64X64:
    case BLOCK_64X32:
    case BLOCK_32X64:
    case BLOCK_32X32:
295
      return &xd->sb_index;
296 297 298
    case BLOCK_32X16:
    case BLOCK_16X32:
    case BLOCK_16X16:
299
      return &xd->mb_index;
300 301 302
    case BLOCK_16X8:
    case BLOCK_8X16:
    case BLOCK_8X8:
303
      return &xd->b_index;
304 305 306
    case BLOCK_8X4:
    case BLOCK_4X8:
    case BLOCK_4X4:
307 308 309 310 311 312 313
      return &xd->ab_index;
    default:
      assert(0);
      return NULL;
  }
}

314 315 316
static INLINE void update_partition_context(MACROBLOCKD *xd,
                                            BLOCK_SIZE_TYPE sb_type,
                                            BLOCK_SIZE_TYPE sb_size) {
James Zern's avatar
James Zern committed
317 318 319
  const int bsl = b_width_log2(sb_size), bs = (1 << bsl) / 2;
  const int bwl = b_width_log2(sb_type);
  const int bhl = b_height_log2(sb_type);
320
  const int boffset = b_width_log2(BLOCK_64X64) - bsl;
James Zern's avatar
James Zern committed
321 322 323
  const char pcval0 = ~(0xe << boffset);
  const char pcval1 = ~(0xf << boffset);
  const char pcvalue[2] = {pcval0, pcval1};
324 325

  assert(MAX(bwl, bhl) <= bsl);
326

327 328 329
  // update the partition context at the end notes. set partition bits
  // of block sizes larger than the current one to be one, and partition
  // bits of smaller block sizes to be zero.
330 331
  vpx_memset(xd->above_seg_context, pcvalue[bwl == bsl], bs);
  vpx_memset(xd->left_seg_context, pcvalue[bhl == bsl], bs);
332 333 334 335
}

static INLINE int partition_plane_context(MACROBLOCKD *xd,
                                          BLOCK_SIZE_TYPE sb_type) {
336
  int bsl = mi_width_log2(sb_type), bs = 1 << bsl;
337
  int above = 0, left = 0, i;
338
  int boffset = mi_width_log2(BLOCK_64X64) - bsl;
339

340
  assert(mi_width_log2(sb_type) == mi_height_log2(sb_type));
341 342 343 344 345 346 347 348 349 350 351
  assert(bsl >= 0);
  assert(boffset >= 0);

  for (i = 0; i < bs; i++)
    above |= (xd->above_seg_context[i] & (1 << boffset));
  for (i = 0; i < bs; i++)
    left |= (xd->left_seg_context[i] & (1 << boffset));

  above = (above > 0);
  left  = (left > 0);

352
  return (left * 2 + above) + bsl * PARTITION_PLOFFSET;
353 354
}

355 356
static BLOCK_SIZE_TYPE get_subsize(BLOCK_SIZE_TYPE bsize,
                                   PARTITION_TYPE partition) {
357 358
  BLOCK_SIZE_TYPE subsize = subsize_lookup[partition][bsize];
  assert(subsize != BLOCK_SIZE_TYPES);
359 360 361
  return subsize;
}

362
extern const TX_TYPE mode2txfm_map[MB_MODE_COUNT];
363

364 365 366 367 368 369 370
static INLINE TX_TYPE get_tx_type_4x4(PLANE_TYPE plane_type,
                                      const MACROBLOCKD *xd, int ib) {
  const MODE_INFO *const mi = xd->mode_info_context;
  const MB_MODE_INFO *const mbmi = &mi->mbmi;

  if (plane_type != PLANE_TYPE_Y_WITH_DC ||
      xd->lossless ||
371
      is_inter_block(mbmi))
Yaowu Xu's avatar
Yaowu Xu committed
372
    return DCT_DCT;
Dmitry Kovalev's avatar
Dmitry Kovalev committed
373

374
  return mode2txfm_map[mbmi->sb_type < BLOCK_8X8 ?
375
                       mi->bmi[ib].as_mode : mbmi->mode];
Deb Mukherjee's avatar
Deb Mukherjee committed
376 377
}

378 379 380 381
static INLINE TX_TYPE get_tx_type_8x8(PLANE_TYPE plane_type,
                                      const MACROBLOCKD *xd) {
  return plane_type == PLANE_TYPE_Y_WITH_DC ?
             mode2txfm_map[xd->mode_info_context->mbmi.mode] : DCT_DCT;
382
}
383

384 385 386 387
static INLINE TX_TYPE get_tx_type_16x16(PLANE_TYPE plane_type,
                                        const MACROBLOCKD *xd) {
  return plane_type == PLANE_TYPE_Y_WITH_DC ?
             mode2txfm_map[xd->mode_info_context->mbmi.mode] : DCT_DCT;
Deb Mukherjee's avatar
Deb Mukherjee committed
388 389
}

390 391 392 393 394 395 396 397 398 399
static void setup_block_dptrs(MACROBLOCKD *xd, int ss_x, int ss_y) {
  int i;

  for (i = 0; i < MAX_MB_PLANE; i++) {
    xd->plane[i].plane_type = i ? PLANE_TYPE_UV : PLANE_TYPE_Y_WITH_DC;
    xd->plane[i].subsampling_x = i ? ss_x : 0;
    xd->plane[i].subsampling_y = i ? ss_y : 0;
  }
#if CONFIG_ALPHA
  // TODO(jkoleszar): Using the Y w/h for now
400 401
  xd->plane[3].subsampling_x = 0;
  xd->plane[3].subsampling_y = 0;
402 403 404
#endif
}

John Koleszar's avatar
John Koleszar committed
405

406
static INLINE TX_SIZE get_uv_tx_size(const MB_MODE_INFO *mbmi) {
407
  return MIN(mbmi->txfm_size, max_uv_txsize_lookup[mbmi->sb_type]);
408
}
409

410 411 412 413 414 415 416
struct plane_block_idx {
  int plane;
  int block;
};

// TODO(jkoleszar): returning a struct so it can be used in a const context,
// expect to refactor this further later.
John Koleszar's avatar
John Koleszar committed
417
static INLINE struct plane_block_idx plane_block_idx(int y_blocks,
418
                                                     int b_idx) {
John Koleszar's avatar
John Koleszar committed
419
  const int v_offset = y_blocks * 5 / 4;
420 421
  struct plane_block_idx res;

John Koleszar's avatar
John Koleszar committed
422
  if (b_idx < y_blocks) {
423 424 425 426
    res.plane = 0;
    res.block = b_idx;
  } else if (b_idx < v_offset) {
    res.plane = 1;
John Koleszar's avatar
John Koleszar committed
427
    res.block = b_idx - y_blocks;
428
  } else {
John Koleszar's avatar
John Koleszar committed
429
    assert(b_idx < y_blocks * 3 / 2);
430 431 432 433 434 435
    res.plane = 2;
    res.block = b_idx - v_offset;
  }
  return res;
}

436 437 438 439 440 441 442 443 444 445
static INLINE int plane_block_width(BLOCK_SIZE_TYPE bsize,
                                    const struct macroblockd_plane* plane) {
  return 4 << (b_width_log2(bsize) - plane->subsampling_x);
}

static INLINE int plane_block_height(BLOCK_SIZE_TYPE bsize,
                                     const struct macroblockd_plane* plane) {
  return 4 << (b_height_log2(bsize) - plane->subsampling_y);
}

446 447 448 449 450 451 452 453 454 455
static INLINE int plane_block_width_log2by4(
    BLOCK_SIZE_TYPE bsize, const struct macroblockd_plane* plane) {
  return (b_width_log2(bsize) - plane->subsampling_x);
}

static INLINE int plane_block_height_log2by4(
    BLOCK_SIZE_TYPE bsize, const struct macroblockd_plane* plane) {
  return (b_height_log2(bsize) - plane->subsampling_y);
}

John Koleszar's avatar
John Koleszar committed
456
typedef void (*foreach_transformed_block_visitor)(int plane, int block,
457
                                                  BLOCK_SIZE_TYPE bsize,
John Koleszar's avatar
John Koleszar committed
458 459
                                                  int ss_txfrm_size,
                                                  void *arg);
Jingning Han's avatar
Jingning Han committed
460

John Koleszar's avatar
John Koleszar committed
461
static INLINE void foreach_transformed_block_in_plane(
462
    const MACROBLOCKD* const xd, BLOCK_SIZE_TYPE bsize, int plane,
463
    foreach_transformed_block_visitor visit, void *arg) {
464 465
  const int bw = b_width_log2(bsize), bh = b_height_log2(bsize);

John Koleszar's avatar
John Koleszar committed
466 467
  // block and transform sizes, in number of 4x4 blocks log 2 ("*_b")
  // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8
John Koleszar's avatar
John Koleszar committed
468
  // transform size varies per plane, look it up in a common way.
469 470 471
  const MB_MODE_INFO* mbmi = &xd->mode_info_context->mbmi;
  const TX_SIZE tx_size = plane ? get_uv_tx_size(mbmi)
                                : mbmi->txfm_size;
472
  const int block_size_b = bw + bh;
John Koleszar's avatar
John Koleszar committed
473 474 475
  const int txfrm_size_b = tx_size * 2;

  // subsampled size of the block
476 477
  const int ss_sum = xd->plane[plane].subsampling_x
      + xd->plane[plane].subsampling_y;
John Koleszar's avatar
John Koleszar committed
478 479
  const int ss_block_size = block_size_b - ss_sum;

John Koleszar's avatar
John Koleszar committed
480
  const int step = 1 << txfrm_size_b;
John Koleszar's avatar
John Koleszar committed
481 482 483 484

  int i;

  assert(txfrm_size_b <= block_size_b);
John Koleszar's avatar
John Koleszar committed
485
  assert(txfrm_size_b <= ss_block_size);
486 487 488 489 490 491 492 493 494 495 496 497 498 499 500

  // If mb_to_right_edge is < 0 we are in a situation in which
  // the current block size extends into the UMV and we won't
  // visit the sub blocks that are wholly within the UMV.
  if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) {
    int r, c;
    const int sw = bw - xd->plane[plane].subsampling_x;
    const int sh = bh - xd->plane[plane].subsampling_y;
    int max_blocks_wide = 1 << sw;
    int max_blocks_high = 1 << sh;

    // xd->mb_to_right_edge is in units of pixels * 8.  This converts
    // it to 4x4 block sizes.
    if (xd->mb_to_right_edge < 0)
      max_blocks_wide +=
501
          (xd->mb_to_right_edge >> (5 + xd->plane[plane].subsampling_x));
502 503 504

    if (xd->mb_to_bottom_edge < 0)
      max_blocks_high +=
505
          (xd->mb_to_bottom_edge >> (5 + xd->plane[plane].subsampling_y));
506 507 508 509

    i = 0;
    // Unlike the normal case - in here we have to keep track of the
    // row and column of the blocks we use so that we know if we are in
510
    // the unrestricted motion border.
511 512 513 514 515 516 517 518 519 520 521
    for (r = 0; r < (1 << sh); r += (1 << tx_size)) {
      for (c = 0; c < (1 << sw); c += (1 << tx_size)) {
        if (r < max_blocks_high && c < max_blocks_wide)
          visit(plane, i, bsize, txfrm_size_b, arg);
        i += step;
      }
    }
  } else {
    for (i = 0; i < (1 << ss_block_size); i += step) {
      visit(plane, i, bsize, txfrm_size_b, arg);
    }
John Koleszar's avatar
John Koleszar committed
522 523 524 525
  }
}

static INLINE void foreach_transformed_block(
526
    const MACROBLOCKD* const xd, BLOCK_SIZE_TYPE bsize,
John Koleszar's avatar
John Koleszar committed
527 528 529 530
    foreach_transformed_block_visitor visit, void *arg) {
  int plane;

  for (plane = 0; plane < MAX_MB_PLANE; plane++) {
531
    foreach_transformed_block_in_plane(xd, bsize, plane,
John Koleszar's avatar
John Koleszar committed
532 533 534
                                       visit, arg);
  }
}
535

536
static INLINE void foreach_transformed_block_uv(
537
    const MACROBLOCKD* const xd, BLOCK_SIZE_TYPE bsize,
538 539 540 541
    foreach_transformed_block_visitor visit, void *arg) {
  int plane;

  for (plane = 1; plane < MAX_MB_PLANE; plane++) {
542
    foreach_transformed_block_in_plane(xd, bsize, plane,
543 544 545 546
                                       visit, arg);
  }
}

547 548 549 550 551 552 553 554 555 556
// TODO(jkoleszar): In principle, pred_w, pred_h are unnecessary, as we could
// calculate the subsampled BLOCK_SIZE_TYPE, but that type isn't defined for
// sizes smaller than 16x16 yet.
typedef void (*foreach_predicted_block_visitor)(int plane, int block,
                                                BLOCK_SIZE_TYPE bsize,
                                                int pred_w, int pred_h,
                                                void *arg);
static INLINE void foreach_predicted_block_in_plane(
    const MACROBLOCKD* const xd, BLOCK_SIZE_TYPE bsize, int plane,
    foreach_predicted_block_visitor visit, void *arg) {
557
  int i, x, y;
558 559 560 561

  // block sizes in number of 4x4 blocks log 2 ("*_b")
  // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8
  // subsampled size of the block
562 563
  const int bwl = b_width_log2(bsize) - xd->plane[plane].subsampling_x;
  const int bhl = b_height_log2(bsize) - xd->plane[plane].subsampling_y;
564 565

  // size of the predictor to use.
566 567
  int pred_w, pred_h;

568 569
  if (xd->mode_info_context->mbmi.sb_type < BLOCK_8X8) {
    assert(bsize == BLOCK_8X8);
570 571
    pred_w = 0;
    pred_h = 0;
572
  } else {
573 574
    pred_w = bwl;
    pred_h = bhl;
575
  }
576 577
  assert(pred_w <= bwl);
  assert(pred_h <= bhl);
578 579 580

  // visit each subblock in raster order
  i = 0;
581 582
  for (y = 0; y < 1 << bhl; y += 1 << pred_h) {
    for (x = 0; x < 1 << bwl; x += 1 << pred_w) {
583 584 585
      visit(plane, i, bsize, pred_w, pred_h, arg);
      i += 1 << pred_w;
    }
586
    i += (1 << (bwl + pred_h)) - (1 << bwl);
587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606
  }
}
static INLINE void foreach_predicted_block(
    const MACROBLOCKD* const xd, BLOCK_SIZE_TYPE bsize,
    foreach_predicted_block_visitor visit, void *arg) {
  int plane;

  for (plane = 0; plane < MAX_MB_PLANE; plane++) {
    foreach_predicted_block_in_plane(xd, bsize, plane, visit, arg);
  }
}
static INLINE void foreach_predicted_block_uv(
    const MACROBLOCKD* const xd, BLOCK_SIZE_TYPE bsize,
    foreach_predicted_block_visitor visit, void *arg) {
  int plane;

  for (plane = 1; plane < MAX_MB_PLANE; plane++) {
    foreach_predicted_block_in_plane(xd, bsize, plane, visit, arg);
  }
}
607
static int raster_block_offset(MACROBLOCKD *xd, BLOCK_SIZE_TYPE bsize,
John Koleszar's avatar
John Koleszar committed
608
                               int plane, int block, int stride) {
609 610 611 612 613 614 615
  const int bw = b_width_log2(bsize) - xd->plane[plane].subsampling_x;
  const int y = 4 * (block >> bw), x = 4 * (block & ((1 << bw) - 1));
  return y * stride + x;
}
static int16_t* raster_block_offset_int16(MACROBLOCKD *xd,
                                         BLOCK_SIZE_TYPE bsize,
                                         int plane, int block, int16_t *base) {
616
  const int stride = plane_block_width(bsize, &xd->plane[plane]);
John Koleszar's avatar
John Koleszar committed
617 618 619 620 621 622 623
  return base + raster_block_offset(xd, bsize, plane, block, stride);
}
static uint8_t* raster_block_offset_uint8(MACROBLOCKD *xd,
                                         BLOCK_SIZE_TYPE bsize,
                                         int plane, int block,
                                         uint8_t *base, int stride) {
  return base + raster_block_offset(xd, bsize, plane, block, stride);
624
}
625

John Koleszar's avatar
John Koleszar committed
626 627 628 629 630 631
static int txfrm_block_to_raster_block(MACROBLOCKD *xd,
                                       BLOCK_SIZE_TYPE bsize,
                                       int plane, int block,
                                       int ss_txfrm_size) {
  const int bwl = b_width_log2(bsize) - xd->plane[plane].subsampling_x;
  const int txwl = ss_txfrm_size / 2;
632 633
  const int tx_cols_log2 = bwl - txwl;
  const int tx_cols = 1 << tx_cols_log2;
John Koleszar's avatar
John Koleszar committed
634 635
  const int raster_mb = block >> ss_txfrm_size;
  const int x = (raster_mb & (tx_cols - 1)) << (txwl);
636
  const int y = raster_mb >> tx_cols_log2 << (txwl);
John Koleszar's avatar
John Koleszar committed
637 638 639 640 641 642 643 644 645 646
  return x + (y << bwl);
}

static void txfrm_block_to_raster_xy(MACROBLOCKD *xd,
                                     BLOCK_SIZE_TYPE bsize,
                                     int plane, int block,
                                     int ss_txfrm_size,
                                     int *x, int *y) {
  const int bwl = b_width_log2(bsize) - xd->plane[plane].subsampling_x;
  const int txwl = ss_txfrm_size / 2;
647 648
  const int tx_cols_log2 = bwl - txwl;
  const int tx_cols = 1 << tx_cols_log2;
John Koleszar's avatar
John Koleszar committed
649 650
  const int raster_mb = block >> ss_txfrm_size;
  *x = (raster_mb & (tx_cols - 1)) << (txwl);
651
  *y = raster_mb >> tx_cols_log2 << (txwl);
John Koleszar's avatar
John Koleszar committed
652
}
653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693

static void extend_for_intra(MACROBLOCKD* const xd, int plane, int block,
                             BLOCK_SIZE_TYPE bsize, int ss_txfrm_size) {
  const int bw = plane_block_width(bsize, &xd->plane[plane]);
  const int bh = plane_block_height(bsize, &xd->plane[plane]);
  int x, y;
  txfrm_block_to_raster_xy(xd, bsize, plane, block, ss_txfrm_size, &x, &y);
  x = x * 4 - 1;
  y = y * 4 - 1;
  // Copy a pixel into the umv if we are in a situation where the block size
  // extends into the UMV.
  // TODO(JBB): Should be able to do the full extend in place so we don't have
  // to do this multiple times.
  if (xd->mb_to_right_edge < 0) {
    int umv_border_start = bw
        + (xd->mb_to_right_edge >> (3 + xd->plane[plane].subsampling_x));

    if (x + bw > umv_border_start)
      vpx_memset(
          xd->plane[plane].dst.buf + y * xd->plane[plane].dst.stride
              + umv_border_start,
          *(xd->plane[plane].dst.buf + y * xd->plane[plane].dst.stride
              + umv_border_start - 1),
          bw);
  }
  if (xd->mb_to_bottom_edge < 0) {
    int umv_border_start = bh
        + (xd->mb_to_bottom_edge >> (3 + xd->plane[plane].subsampling_y));
    int i;
    uint8_t c = *(xd->plane[plane].dst.buf
        + (umv_border_start - 1) * xd->plane[plane].dst.stride + x);

    uint8_t *d = xd->plane[plane].dst.buf
        + umv_border_start * xd->plane[plane].dst.stride + x;

    if (y + bh > umv_border_start)
      for (i = 0; i < bh; i++, d += xd->plane[plane].dst.stride)
        *d = c;
  }
}
static void set_contexts_on_border(MACROBLOCKD *xd, BLOCK_SIZE_TYPE bsize,
694 695 696 697
                                   int plane, int tx_size_in_blocks,
                                   int eob, int aoff, int loff,
                                   ENTROPY_CONTEXT *A, ENTROPY_CONTEXT *L) {
  struct macroblockd_plane *pd = &xd->plane[plane];
698 699
  int above_contexts = tx_size_in_blocks;
  int left_contexts = tx_size_in_blocks;
700 701
  int mi_blocks_wide = 1 << plane_block_width_log2by4(bsize, pd);
  int mi_blocks_high = 1 << plane_block_height_log2by4(bsize, pd);
702 703 704 705
  int pt;

  // xd->mb_to_right_edge is in units of pixels * 8.  This converts
  // it to 4x4 block sizes.
706 707
  if (xd->mb_to_right_edge < 0)
    mi_blocks_wide += (xd->mb_to_right_edge >> (5 + pd->subsampling_x));
708 709 710 711 712 713

  // this code attempts to avoid copying into contexts that are outside
  // our border.  Any blocks that do are set to 0...
  if (above_contexts + aoff > mi_blocks_wide)
    above_contexts = mi_blocks_wide - aoff;

714 715 716 717
  if (xd->mb_to_bottom_edge < 0)
    mi_blocks_high += (xd->mb_to_bottom_edge >> (5 + pd->subsampling_y));

  if (left_contexts + loff > mi_blocks_high)
718 719 720 721
    left_contexts = mi_blocks_high - loff;

  for (pt = 0; pt < above_contexts; pt++)
    A[pt] = eob > 0;
722
  for (pt = above_contexts; pt < tx_size_in_blocks; pt++)
723 724 725
    A[pt] = 0;
  for (pt = 0; pt < left_contexts; pt++)
    L[pt] = eob > 0;
726
  for (pt = left_contexts; pt < tx_size_in_blocks; pt++)
727 728 729 730
    L[pt] = 0;
}


731
#endif  // VP9_COMMON_VP9_BLOCKD_H_