vp9_tokenize.c 14.1 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 14 15
 */


#include <math.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
16 17
#include "vp9/encoder/vp9_onyx_int.h"
#include "vp9/encoder/vp9_tokenize.h"
John Koleszar's avatar
John Koleszar committed
18 19
#include "vpx_mem/vpx_mem.h"

20 21 22
#include "vp9/common/vp9_pred_common.h"
#include "vp9/common/vp9_seg_common.h"
#include "vp9/common/vp9_entropy.h"
23

John Koleszar's avatar
John Koleszar committed
24
/* Global event counters used for accumulating statistics across several
25
   compressions, then generating vp9_context.c = initial stats. */
John Koleszar's avatar
John Koleszar committed
26 27

#ifdef ENTROPY_STATS
28 29
vp9_coeff_accum context_counters[TX_SIZES][BLOCK_TYPES];
extern vp9_coeff_stats tree_update_hist[TX_SIZES][BLOCK_TYPES];
30 31
#endif  /* ENTROPY_STATS */

32 33 34
DECLARE_ALIGNED(16, extern const uint8_t,
                vp9_pt_energy_class[MAX_ENTROPY_TOKENS]);

John Koleszar's avatar
John Koleszar committed
35
static TOKENVALUE dct_value_tokens[DCT_MAX_VALUE * 2];
36
const TOKENVALUE *vp9_dct_value_tokens_ptr;
John Koleszar's avatar
John Koleszar committed
37
static int dct_value_cost[DCT_MAX_VALUE * 2];
38
const int *vp9_dct_value_cost_ptr;
39

John Koleszar's avatar
John Koleszar committed
40
static void fill_value_tokens() {
John Koleszar's avatar
John Koleszar committed
41

John Koleszar's avatar
John Koleszar committed
42
  TOKENVALUE *const t = dct_value_tokens + DCT_MAX_VALUE;
43
  vp9_extra_bit *const e = vp9_extra_bits;
John Koleszar's avatar
John Koleszar committed
44

John Koleszar's avatar
John Koleszar committed
45 46
  int i = -DCT_MAX_VALUE;
  int sign = 1;
John Koleszar's avatar
John Koleszar committed
47

John Koleszar's avatar
John Koleszar committed
48 49 50
  do {
    if (!i)
      sign = 0;
John Koleszar's avatar
John Koleszar committed
51

John Koleszar's avatar
John Koleszar committed
52 53 54
    {
      const int a = sign ? -i : i;
      int eb = sign;
John Koleszar's avatar
John Koleszar committed
55

John Koleszar's avatar
John Koleszar committed
56 57
      if (a > 4) {
        int j = 4;
John Koleszar's avatar
John Koleszar committed
58

John Koleszar's avatar
John Koleszar committed
59
        while (++j < 11  &&  e[j].base_val <= a) {}
John Koleszar's avatar
John Koleszar committed
60

61
        t[i].token = --j;
John Koleszar's avatar
John Koleszar committed
62 63
        eb |= (a - e[j].base_val) << 1;
      } else
64
        t[i].token = a;
John Koleszar's avatar
John Koleszar committed
65

66
      t[i].extra = eb;
John Koleszar's avatar
John Koleszar committed
67
    }
John Koleszar's avatar
John Koleszar committed
68

John Koleszar's avatar
John Koleszar committed
69 70 71
    // initialize the cost for extra bits for all possible coefficient value.
    {
      int cost = 0;
72
      vp9_extra_bit *p = vp9_extra_bits + t[i].token;
John Koleszar's avatar
John Koleszar committed
73

John Koleszar's avatar
John Koleszar committed
74
      if (p->base_val) {
75
        const int extra = t[i].extra;
76
        const int length = p->len;
John Koleszar's avatar
John Koleszar committed
77

78 79
        if (length)
          cost += treed_cost(p->tree, p->prob, extra >> 1, length);
John Koleszar's avatar
John Koleszar committed
80

81
        cost += vp9_cost_bit(vp9_prob_half, extra & 1); /* sign */
John Koleszar's avatar
John Koleszar committed
82 83
        dct_value_cost[i + DCT_MAX_VALUE] = cost;
      }
John Koleszar's avatar
John Koleszar committed
84 85 86

    }

John Koleszar's avatar
John Koleszar committed
87 88
  } while (++i < DCT_MAX_VALUE);

89 90
  vp9_dct_value_tokens_ptr = dct_value_tokens + DCT_MAX_VALUE;
  vp9_dct_value_cost_ptr   = dct_value_cost + DCT_MAX_VALUE;
John Koleszar's avatar
John Koleszar committed
91
}
92

93 94 95 96 97 98 99
struct tokenize_b_args {
  VP9_COMP *cpi;
  MACROBLOCKD *xd;
  TOKENEXTRA **tp;
  TX_SIZE tx_size;
  int dry_run;
};
100

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122
static void set_entropy_context_b(int plane, int block, BLOCK_SIZE_TYPE bsize,
                                  int ss_txfrm_size, void *arg) {
  struct tokenize_b_args* const args = arg;
  TX_SIZE tx_size = ss_txfrm_size >> 1;
  MACROBLOCKD *xd = args->xd;
  const int bwl = b_width_log2(bsize);
  const int off = block >> (2 * tx_size);
  const int mod = bwl - tx_size - xd->plane[plane].subsampling_x;
  const int aoff = (off & ((1 << mod) - 1)) << tx_size;
  const int loff = (off >> mod) << tx_size;
  ENTROPY_CONTEXT *A = xd->plane[plane].above_context + aoff;
  ENTROPY_CONTEXT *L = xd->plane[plane].left_context + loff;
  const int eob = xd->plane[plane].eobs[block];

  if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) {
    set_contexts_on_border(xd, bsize, plane, tx_size, eob, aoff, loff, A, L);
  } else {
    vpx_memset(A, eob > 0, sizeof(ENTROPY_CONTEXT) * (1 << tx_size));
    vpx_memset(L, eob > 0, sizeof(ENTROPY_CONTEXT) * (1 << tx_size));
  }
}

123 124 125 126 127 128 129 130 131
static void tokenize_b(int plane, int block, BLOCK_SIZE_TYPE bsize,
                       int ss_txfrm_size, void *arg) {
  struct tokenize_b_args* const args = arg;
  VP9_COMP *cpi = args->cpi;
  MACROBLOCKD *xd = args->xd;
  TOKENEXTRA **tp = args->tp;
  TX_SIZE tx_size = ss_txfrm_size / 2;
  int dry_run = args->dry_run;

132
  MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi;
Daniel Kang's avatar
Daniel Kang committed
133
  int pt; /* near block/prev token context index */
134
  int c = 0, rc = 0;
Daniel Kang's avatar
Daniel Kang committed
135
  TOKENEXTRA *t = *tp;        /* store tokens starting here */
136
  const int eob = xd->plane[plane].eobs[block];
137
  const PLANE_TYPE type = xd->plane[plane].plane_type;
138
  const int16_t *qcoeff_ptr = BLOCK_OFFSET(xd->plane[plane].qcoeff, block, 16);
139 140
  const BLOCK_SIZE_TYPE sb_type = (mbmi->sb_type < BLOCK_SIZE_SB8X8) ?
                                   BLOCK_SIZE_SB8X8 : mbmi->sb_type;
141
  const int bwl = b_width_log2(sb_type);
142 143
  const int off = block >> (2 * tx_size);
  const int mod = bwl - tx_size - xd->plane[plane].subsampling_x;
144 145
  const int aoff = (off & ((1 << mod) - 1)) << tx_size;
  const int loff = (off >> mod) << tx_size;
146 147
  ENTROPY_CONTEXT *A = xd->plane[plane].above_context + aoff;
  ENTROPY_CONTEXT *L = xd->plane[plane].left_context + loff;
148
  int seg_eob;
149
  const int segment_id = mbmi->segment_id;
150
  const int16_t *scan, *nb;
151
  vp9_coeff_count *counts;
152
  vp9_coeff_probs_model *coef_probs;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
153
  const int ref = mbmi->ref_frame[0] != INTRA_FRAME;
154
  ENTROPY_CONTEXT above_ec, left_ec;
155
  uint8_t token_cache[1024];
Dmitry Kovalev's avatar
Dmitry Kovalev committed
156
  const uint8_t *band_translate;
157
  assert((!type && !plane) || (type && plane));
158

159 160
  counts = cpi->coef_counts[tx_size];
  coef_probs = cpi->common.fc.coef_probs[tx_size];
161 162
  switch (tx_size) {
    default:
163
    case TX_4X4:
164 165
      above_ec = A[0] != 0;
      left_ec = L[0] != 0;
166
      seg_eob = 16;
167
      scan = get_scan_4x4(get_tx_type_4x4(type, xd, block));
Paul Wilkins's avatar
Paul Wilkins committed
168
      band_translate = vp9_coefband_trans_4x4;
169
      break;
170
    case TX_8X8:
171 172
      above_ec = (A[0] + A[1]) != 0;
      left_ec = (L[0] + L[1]) != 0;
173
      seg_eob = 64;
174
      scan = get_scan_8x8(get_tx_type_8x8(type, xd));
Paul Wilkins's avatar
Paul Wilkins committed
175
      band_translate = vp9_coefband_trans_8x8plus;
176
      break;
177
    case TX_16X16:
178 179
      above_ec = (A[0] + A[1] + A[2] + A[3]) != 0;
      left_ec = (L[0] + L[1] + L[2] + L[3]) != 0;
180
      seg_eob = 256;
181
      scan = get_scan_16x16(get_tx_type_16x16(type, xd));
Paul Wilkins's avatar
Paul Wilkins committed
182
      band_translate = vp9_coefband_trans_8x8plus;
183 184
      break;
    case TX_32X32:
185 186
      above_ec = (A[0] + A[1] + A[2] + A[3] + A[4] + A[5] + A[6] + A[7]) != 0;
      left_ec = (L[0] + L[1] + L[2] + L[3] + L[4] + L[5] + L[6] + L[7]) != 0;
187
      seg_eob = 1024;
Paul Wilkins's avatar
Paul Wilkins committed
188
      scan = vp9_default_scan_32x32;
Paul Wilkins's avatar
Paul Wilkins committed
189
      band_translate = vp9_coefband_trans_8x8plus;
190
      break;
John Koleszar's avatar
John Koleszar committed
191 192
  }

193
  pt = combine_entropy_contexts(above_ec, left_ec);
194
  nb = vp9_get_coef_neighbors_handle(scan);
Yaowu Xu's avatar
Yaowu Xu committed
195

196
  if (vp9_segfeature_active(&xd->seg, segment_id, SEG_LVL_SKIP))
Paul Wilkins's avatar
Paul Wilkins committed
197
    seg_eob = 0;
John Koleszar's avatar
John Koleszar committed
198

199
  c = 0;
200
  do {
Paul Wilkins's avatar
Paul Wilkins committed
201
    const int band = get_coef_band(band_translate, c);
202
    int token;
203
    int v = 0;
204 205
    rc = scan[c];
    if (c)
206
      pt = get_coef_context(nb, token_cache, c);
207
    if (c < eob) {
208
      v = qcoeff_ptr[rc];
209 210
      assert(-DCT_MAX_VALUE <= v  &&  v < DCT_MAX_VALUE);

211 212
      t->extra = vp9_dct_value_tokens_ptr[v].extra;
      token    = vp9_dct_value_tokens_ptr[v].token;
213
    } else {
214
      token = DCT_EOB_TOKEN;
215
    }
John Koleszar's avatar
John Koleszar committed
216

217
    t->token = token;
218
    t->context_tree = coef_probs[type][ref][band][pt];
219
    t->skip_eob_node = (c > 0) && (token_cache[scan[c - 1]] == 0);
220

221
    assert(vp9_coef_encodings[t->token].len - t->skip_eob_node > 0);
222

223
    if (!dry_run) {
224
      ++counts[type][ref][band][pt][token];
225
      if (!t->skip_eob_node)
226
        ++cpi->common.counts.eob_branch[tx_size][type][ref][band][pt];
227
    }
228
    token_cache[scan[c]] = vp9_pt_energy_class[token];
229
    ++t;
230
  } while (c < eob && ++c < seg_eob);
231 232

  *tp = t;
233 234 235 236 237 238
  if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) {
    set_contexts_on_border(xd, bsize, plane, tx_size, c, aoff, loff, A, L);
  } else {
    for (pt = 0; pt < (1 << tx_size); pt++) {
      A[pt] = L[pt] = c > 0;
    }
Yaowu Xu's avatar
Yaowu Xu committed
239
  }
John Koleszar's avatar
John Koleszar committed
240 241
}

242 243 244 245 246
struct is_skippable_args {
  MACROBLOCKD *xd;
  int *skippable;
};
static void is_skippable(int plane, int block,
247
                         BLOCK_SIZE_TYPE bsize, int ss_txfrm_size, void *argv) {
248 249
  struct is_skippable_args *args = argv;
  args->skippable[0] &= (!args->xd->plane[plane].eobs[block]);
Deb Mukherjee's avatar
Deb Mukherjee committed
250 251
}

252 253 254
int vp9_sb_is_skippable(MACROBLOCKD *xd, BLOCK_SIZE_TYPE bsize) {
  int result = 1;
  struct is_skippable_args args = {xd, &result};
255
  foreach_transformed_block(xd, bsize, is_skippable, &args);
256
  return result;
257 258
}

259 260 261
int vp9_sby_is_skippable(MACROBLOCKD *xd, BLOCK_SIZE_TYPE bsize) {
  int result = 1;
  struct is_skippable_args args = {xd, &result};
Dmitry Kovalev's avatar
Dmitry Kovalev committed
262
  foreach_transformed_block_in_plane(xd, bsize, 0, is_skippable, &args);
263
  return result;
264 265
}

266 267 268
int vp9_sbuv_is_skippable(MACROBLOCKD *xd, BLOCK_SIZE_TYPE bsize) {
  int result = 1;
  struct is_skippable_args args = {xd, &result};
269
  foreach_transformed_block_uv(xd, bsize, is_skippable, &args);
270
  return result;
271 272
}

273 274 275 276 277
void vp9_tokenize_sb(VP9_COMP *cpi, TOKENEXTRA **t, int dry_run,
                     BLOCK_SIZE_TYPE bsize) {
  VP9_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &cpi->mb.e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mode_info_context->mbmi;
278
  TOKENEXTRA *t_backup = *t;
279
  const int mb_skip_context = vp9_get_pred_context_mbskip(xd);
280 281
  const int skip_inc = !vp9_segfeature_active(&xd->seg, mbmi->segment_id,
                                              SEG_LVL_SKIP);
282
  struct tokenize_b_args arg = { cpi, xd, t, mbmi->txfm_size, dry_run };
283

284
  mbmi->mb_skip_coeff = vp9_sb_is_skippable(xd, bsize);
285 286
  if (mbmi->mb_skip_coeff) {
    if (!dry_run)
287
      cm->counts.mbskip[mb_skip_context][1] += skip_inc;
288
    vp9_reset_sb_tokens_context(xd, bsize);
289 290 291 292 293
    if (dry_run)
      *t = t_backup;
    return;
  }

294
  if (!dry_run) {
295
    cm->counts.mbskip[mb_skip_context][0] += skip_inc;
296 297 298
    foreach_transformed_block(xd, bsize, tokenize_b, &arg);
  } else {
    foreach_transformed_block(xd, bsize, set_entropy_context_b, &arg);
299
    *t = t_backup;
300
  }
301 302
}

John Koleszar's avatar
John Koleszar committed
303
#ifdef ENTROPY_STATS
John Koleszar's avatar
John Koleszar committed
304 305 306
void init_context_counters(void) {
  FILE *f = fopen("context.bin", "rb");
  if (!f) {
307
    vp9_zero(context_counters);
John Koleszar's avatar
John Koleszar committed
308
  } else {
309
    fread(context_counters, sizeof(context_counters), 1, f);
John Koleszar's avatar
John Koleszar committed
310 311 312 313 314
    fclose(f);
  }

  f = fopen("treeupdate.bin", "rb");
  if (!f) {
315
    vpx_memset(tree_update_hist, 0, sizeof(tree_update_hist));
John Koleszar's avatar
John Koleszar committed
316
  } else {
317
    fread(tree_update_hist, sizeof(tree_update_hist), 1, f);
John Koleszar's avatar
John Koleszar committed
318 319
    fclose(f);
  }
John Koleszar's avatar
John Koleszar committed
320 321
}

322 323
static void print_counter(FILE *f, vp9_coeff_accum *context_counters,
                          int block_types, const char *header) {
324
  int type, ref, band, pt, t;
John Koleszar's avatar
John Koleszar committed
325

326
  fprintf(f, "static const vp9_coeff_count %s = {\n", header);
John Koleszar's avatar
John Koleszar committed
327

328
#define Comma(X) (X ? "," : "")
John Koleszar's avatar
John Koleszar committed
329 330
  type = 0;
  do {
331
    ref = 0;
John Koleszar's avatar
John Koleszar committed
332 333
    fprintf(f, "%s\n  { /* block Type %d */", Comma(type), type);
    do {
334 335
      fprintf(f, "%s\n    { /* %s */", Comma(type), ref ? "Inter" : "Intra");
      band = 0;
John Koleszar's avatar
John Koleszar committed
336
      do {
337 338
        fprintf(f, "%s\n      { /* Coeff Band %d */", Comma(band), band);
        pt = 0;
John Koleszar's avatar
John Koleszar committed
339
        do {
340 341 342 343 344 345 346 347 348
          fprintf(f, "%s\n        {", Comma(pt));

          t = 0;
          do {
            const int64_t x = context_counters[type][ref][band][pt][t];
            const int y = (int) x;

            assert(x == (int64_t) y);  /* no overflow handling yet */
            fprintf(f, "%s %d", Comma(t), y);
349
          } while (++t < 1 + MAX_ENTROPY_TOKENS);
350 351 352 353
          fprintf(f, "}");
        } while (++pt < PREV_COEF_CONTEXTS);
        fprintf(f, "\n      }");
      } while (++band < COEF_BANDS);
John Koleszar's avatar
John Koleszar committed
354
      fprintf(f, "\n    }");
355
    } while (++ref < REF_TYPES);
John Koleszar's avatar
John Koleszar committed
356
    fprintf(f, "\n  }");
357
  } while (++type < block_types);
Daniel Kang's avatar
Daniel Kang committed
358
  fprintf(f, "\n};\n");
359
}
360

361 362
static void print_probs(FILE *f, vp9_coeff_accum *context_counters,
                        int block_types, const char *header) {
363
  int type, ref, band, pt, t;
Daniel Kang's avatar
Daniel Kang committed
364

365
  fprintf(f, "static const vp9_coeff_probs %s = {", header);
366

John Koleszar's avatar
John Koleszar committed
367
  type = 0;
368
#define Newline(x, spaces) (x ? " " : "\n" spaces)
John Koleszar's avatar
John Koleszar committed
369
  do {
370 371
    fprintf(f, "%s%s{ /* block Type %d */",
            Comma(type), Newline(type, "  "), type);
372
    ref = 0;
John Koleszar's avatar
John Koleszar committed
373
    do {
374 375 376
      fprintf(f, "%s%s{ /* %s */",
              Comma(band), Newline(band, "    "), ref ? "Inter" : "Intra");
      band = 0;
John Koleszar's avatar
John Koleszar committed
377
      do {
378 379 380
        fprintf(f, "%s%s{ /* Coeff Band %d */",
                Comma(band), Newline(band, "      "), band);
        pt = 0;
John Koleszar's avatar
John Koleszar committed
381
        do {
382
          unsigned int branch_ct[ENTROPY_NODES][2];
383
          unsigned int coef_counts[MAX_ENTROPY_TOKENS + 1];
384 385
          vp9_prob coef_probs[ENTROPY_NODES];

386 387 388
          if (pt >= 3 && band == 0)
            break;
          for (t = 0; t < MAX_ENTROPY_TOKENS + 1; ++t)
389
            coef_counts[t] = context_counters[type][ref][band][pt][t];
390 391
          vp9_tree_probs_from_distribution(vp9_coef_tree, coef_probs,
                                           branch_ct, coef_counts, 0);
392 393
          branch_ct[0][1] = coef_counts[MAX_ENTROPY_TOKENS] - branch_ct[0][0];
          coef_probs[0] = get_binary_prob(branch_ct[0][0], branch_ct[0][1]);
394 395 396 397 398 399 400 401 402 403 404
          fprintf(f, "%s\n      {", Comma(pt));

          t = 0;
          do {
            fprintf(f, "%s %3d", Comma(t), coef_probs[t]);
          } while (++t < ENTROPY_NODES);

          fprintf(f, " }");
        } while (++pt < PREV_COEF_CONTEXTS);
        fprintf(f, "\n      }");
      } while (++band < COEF_BANDS);
John Koleszar's avatar
John Koleszar committed
405
      fprintf(f, "\n    }");
406
    } while (++ref < REF_TYPES);
John Koleszar's avatar
John Koleszar committed
407
    fprintf(f, "\n  }");
408
  } while (++type < block_types);
John Koleszar's avatar
John Koleszar committed
409
  fprintf(f, "\n};\n");
410
}
411

412 413
void print_context_counters() {
  FILE *f = fopen("vp9_context.c", "w");
414

415 416
  fprintf(f, "#include \"vp9_entropy.h\"\n");
  fprintf(f, "\n/* *** GENERATED FILE: DO NOT EDIT *** */\n\n");
John Koleszar's avatar
John Koleszar committed
417

418
  /* print counts */
419
  print_counter(f, context_counters[TX_4X4], BLOCK_TYPES,
420
                "vp9_default_coef_counts_4x4[BLOCK_TYPES]");
421
  print_counter(f, context_counters[TX_8X8], BLOCK_TYPES,
422
                "vp9_default_coef_counts_8x8[BLOCK_TYPES]");
423
  print_counter(f, context_counters[TX_16X16], BLOCK_TYPES,
424
                "vp9_default_coef_counts_16x16[BLOCK_TYPES]");
425
  print_counter(f, context_counters[TX_32X32], BLOCK_TYPES,
426
                "vp9_default_coef_counts_32x32[BLOCK_TYPES]");
Daniel Kang's avatar
Daniel Kang committed
427

428
  /* print coefficient probabilities */
429
  print_probs(f, context_counters[TX_4X4], BLOCK_TYPES,
430
              "default_coef_probs_4x4[BLOCK_TYPES]");
431
  print_probs(f, context_counters[TX_8X8], BLOCK_TYPES,
432
              "default_coef_probs_8x8[BLOCK_TYPES]");
433
  print_probs(f, context_counters[TX_16X16], BLOCK_TYPES,
434
              "default_coef_probs_16x16[BLOCK_TYPES]");
435
  print_probs(f, context_counters[TX_32X32], BLOCK_TYPES,
436
              "default_coef_probs_32x32[BLOCK_TYPES]");
Daniel Kang's avatar
Daniel Kang committed
437

John Koleszar's avatar
John Koleszar committed
438 439 440
  fclose(f);

  f = fopen("context.bin", "wb");
441
  fwrite(context_counters, sizeof(context_counters), 1, f);
John Koleszar's avatar
John Koleszar committed
442
  fclose(f);
John Koleszar's avatar
John Koleszar committed
443 444 445
}
#endif

446
void vp9_tokenize_initialize() {
John Koleszar's avatar
John Koleszar committed
447
  fill_value_tokens();
John Koleszar's avatar
John Koleszar committed
448
}