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_SIZE_MAX_SB][BLOCK_TYPES];
extern vp9_coeff_stats tree_update_hist[TX_SIZE_MAX_SB][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
extern const int *vp9_get_coef_neighbors_handle(const int *scan, int *pad);

95
96
97
98
99
100
101
struct tokenize_b_args {
  VP9_COMP *cpi;
  MACROBLOCKD *xd;
  TOKENEXTRA **tp;
  TX_SIZE tx_size;
  int dry_run;
};
102

103
104
105
106
107
108
109
110
111
112
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;
  PLANE_TYPE type = plane ? PLANE_TYPE_UV : PLANE_TYPE_Y_WITH_DC;
  TX_SIZE tx_size = ss_txfrm_size / 2;
  int dry_run = args->dry_run;

113
  MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi;
Daniel Kang's avatar
Daniel Kang committed
114
  int pt; /* near block/prev token context index */
115
  int c = 0, rc = 0;
Daniel Kang's avatar
Daniel Kang committed
116
  TOKENEXTRA *t = *tp;        /* store tokens starting here */
117
118
  const int eob = xd->plane[plane].eobs[block];
  const int16_t *qcoeff_ptr = BLOCK_OFFSET(xd->plane[plane].qcoeff, block, 16);
119
120
  const BLOCK_SIZE_TYPE sb_type = (mbmi->sb_type < BLOCK_SIZE_SB8X8) ?
                                   BLOCK_SIZE_SB8X8 : mbmi->sb_type;
121
  const int bwl = b_width_log2(sb_type);
122
123
  const int off = block >> (2 * tx_size);
  const int mod = bwl - tx_size - xd->plane[plane].subsampling_x;
124
125
  const int aoff = (off & ((1 << mod) - 1)) << tx_size;
  const int loff = (off >> mod) << tx_size;
126
127
  ENTROPY_CONTEXT *A = xd->plane[plane].above_context + aoff;
  ENTROPY_CONTEXT *L = xd->plane[plane].left_context + loff;
128
  int seg_eob, default_eob, pad;
129
  const int segment_id = mbmi->segment_id;
130
  const int *scan, *nb;
131
  vp9_coeff_count *counts;
132
  vp9_coeff_probs_model *coef_probs;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
133
  const int ref = mbmi->ref_frame[0] != INTRA_FRAME;
134
  ENTROPY_CONTEXT above_ec, left_ec;
135
  uint8_t token_cache[1024];
136
  TX_TYPE tx_type = DCT_DCT;
Paul Wilkins's avatar
Paul Wilkins committed
137
  const uint8_t * band_translate;
138
  assert((!type && !plane) || (type && plane));
139

140
141
  counts = cpi->coef_counts[tx_size];
  coef_probs = cpi->common.fc.coef_probs[tx_size];
142
143
  switch (tx_size) {
    default:
144
    case TX_4X4: {
145
      tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
John Koleszar's avatar
John Koleszar committed
146
          get_tx_type_4x4(xd, block) : DCT_DCT;
147
148
      above_ec = A[0] != 0;
      left_ec = L[0] != 0;
149
      seg_eob = 16;
150
      scan = get_scan_4x4(tx_type);
Paul Wilkins's avatar
Paul Wilkins committed
151
      band_translate = vp9_coefband_trans_4x4;
152
      break;
153
    }
154
    case TX_8X8: {
155
      const int sz = 1 + b_width_log2(sb_type);
John Koleszar's avatar
John Koleszar committed
156
      const int x = block & ((1 << sz) - 1), y = block - x;
157
158
      tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
          get_tx_type_8x8(xd, y + (x >> 1)) : DCT_DCT;
159
160
      above_ec = (A[0] + A[1]) != 0;
      left_ec = (L[0] + L[1]) != 0;
161
      seg_eob = 64;
162
      scan = get_scan_8x8(tx_type);
Paul Wilkins's avatar
Paul Wilkins committed
163
      band_translate = vp9_coefband_trans_8x8plus;
164
      break;
165
166
    }
    case TX_16X16: {
167
      const int sz = 2 + b_width_log2(sb_type);
John Koleszar's avatar
John Koleszar committed
168
      const int x = block & ((1 << sz) - 1), y = block - x;
169
170
      tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
          get_tx_type_16x16(xd, y + (x >> 2)) : DCT_DCT;
171
172
      above_ec = (A[0] + A[1] + A[2] + A[3]) != 0;
      left_ec = (L[0] + L[1] + L[2] + L[3]) != 0;
173
      seg_eob = 256;
174
      scan = get_scan_16x16(tx_type);
Paul Wilkins's avatar
Paul Wilkins committed
175
      band_translate = vp9_coefband_trans_8x8plus;
176
      break;
177
    }
178
    case TX_32X32:
179
180
      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;
181
      seg_eob = 1024;
Paul Wilkins's avatar
Paul Wilkins committed
182
      scan = vp9_default_scan_32x32;
Paul Wilkins's avatar
Paul Wilkins committed
183
      band_translate = vp9_coefband_trans_8x8plus;
184
      break;
John Koleszar's avatar
John Koleszar committed
185
186
  }

187
  pt = combine_entropy_contexts(above_ec, left_ec);
188
189
  nb = vp9_get_coef_neighbors_handle(scan, &pad);
  default_eob = seg_eob;
Yaowu Xu's avatar
Yaowu Xu committed
190

Paul Wilkins's avatar
Paul Wilkins committed
191
192
  if (vp9_segfeature_active(xd, segment_id, SEG_LVL_SKIP))
    seg_eob = 0;
John Koleszar's avatar
John Koleszar committed
193

194
  c = 0;
195
  do {
Paul Wilkins's avatar
Paul Wilkins committed
196
    const int band = get_coef_band(band_translate, c);
197
    int token;
198
    int v = 0;
199
200
201
    rc = scan[c];
    if (c)
      pt = vp9_get_coef_context(scan, nb, pad, token_cache, c, default_eob);
202
    if (c < eob) {
203
      v = qcoeff_ptr[rc];
204
205
      assert(-DCT_MAX_VALUE <= v  &&  v < DCT_MAX_VALUE);

206
207
      t->extra = vp9_dct_value_tokens_ptr[v].extra;
      token    = vp9_dct_value_tokens_ptr[v].token;
208
    } else {
209
      token = DCT_EOB_TOKEN;
210
    }
John Koleszar's avatar
John Koleszar committed
211

212
    t->token = token;
213
    t->context_tree = coef_probs[type][ref][band][pt];
214
    t->skip_eob_node = (c > 0) && (token_cache[scan[c - 1]] == 0);
215
216
217
218
219

#if CONFIG_BALANCED_COEFTREE
    assert(token <= ZERO_TOKEN ||
           vp9_coef_encodings[t->token].len - t->skip_eob_node > 0);
#else
220
    assert(vp9_coef_encodings[t->token].len - t->skip_eob_node > 0);
221
#endif
222

223
    if (!dry_run) {
224
      ++counts[type][ref][band][pt][token];
225
226
227
#if CONFIG_BALANCED_COEFTREE
      if (!t->skip_eob_node && token > ZERO_TOKEN)
#else
228
      if (!t->skip_eob_node)
229
#endif
230
        ++cpi->common.fc.eob_branch_counts[tx_size][type][ref][band][pt];
231
    }
232
    token_cache[scan[c]] = vp9_pt_energy_class[token];
233
    ++t;
234
  } while (c < eob && ++c < seg_eob);
235
236

  *tp = t;
237
238
239
240
241
242
  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
243
  }
John Koleszar's avatar
John Koleszar committed
244
245
}

246
247
248
249
250
struct is_skippable_args {
  MACROBLOCKD *xd;
  int *skippable;
};
static void is_skippable(int plane, int block,
251
                         BLOCK_SIZE_TYPE bsize, int ss_txfrm_size, void *argv) {
252
253
  struct is_skippable_args *args = argv;
  args->skippable[0] &= (!args->xd->plane[plane].eobs[block]);
Deb Mukherjee's avatar
Deb Mukherjee committed
254
255
}

256
257
258
int vp9_sb_is_skippable(MACROBLOCKD *xd, BLOCK_SIZE_TYPE bsize) {
  int result = 1;
  struct is_skippable_args args = {xd, &result};
259
  foreach_transformed_block(xd, bsize, is_skippable, &args);
260
  return result;
261
262
}

263
264
265
int vp9_sby_is_skippable(MACROBLOCKD *xd, BLOCK_SIZE_TYPE bsize) {
  int result = 1;
  struct is_skippable_args args = {xd, &result};
266
267
  foreach_transformed_block_in_plane(xd, bsize, 0,
                                     is_skippable, &args);
268
  return result;
269
270
}

271
272
273
int vp9_sbuv_is_skippable(MACROBLOCKD *xd, BLOCK_SIZE_TYPE bsize) {
  int result = 1;
  struct is_skippable_args args = {xd, &result};
274
  foreach_transformed_block_uv(xd, bsize, is_skippable, &args);
275
  return result;
276
277
}

278
279
280
void vp9_tokenize_sb(VP9_COMP *cpi,
                     MACROBLOCKD *xd,
                     TOKENEXTRA **t,
281
                     int dry_run, BLOCK_SIZE_TYPE bsize) {
282
283
284
285
286
  VP9_COMMON * const cm = &cpi->common;
  MB_MODE_INFO * const mbmi = &xd->mode_info_context->mbmi;
  TOKENEXTRA *t_backup = *t;
  const int mb_skip_context = vp9_get_pred_context(cm, xd, PRED_MBSKIP);
  const int segment_id = mbmi->segment_id;
Paul Wilkins's avatar
Paul Wilkins committed
287
  const int skip_inc = !vp9_segfeature_active(xd, segment_id, SEG_LVL_SKIP);
288
  const TX_SIZE txfm_size = mbmi->txfm_size;
289
290
291
  struct tokenize_b_args arg = {
    cpi, xd, t, txfm_size, dry_run
  };
292

293
  mbmi->mb_skip_coeff = vp9_sb_is_skippable(xd, bsize);
294
295
296
297

  if (mbmi->mb_skip_coeff) {
    if (!dry_run)
      cpi->skip_true_count[mb_skip_context] += skip_inc;
298
    vp9_reset_sb_tokens_context(xd, bsize);
299
300
301
302
303
304
305
306
    if (dry_run)
      *t = t_backup;
    return;
  }

  if (!dry_run)
    cpi->skip_false_count[mb_skip_context] += skip_inc;

307
  foreach_transformed_block(xd, bsize, tokenize_b, &arg);
308

309
310
311
312
  if (dry_run)
    *t = t_backup;
}

John Koleszar's avatar
John Koleszar committed
313
#ifdef ENTROPY_STATS
John Koleszar's avatar
John Koleszar committed
314
315
316
void init_context_counters(void) {
  FILE *f = fopen("context.bin", "rb");
  if (!f) {
317
    vp9_zero(context_counters);
John Koleszar's avatar
John Koleszar committed
318
  } else {
319
    fread(context_counters, sizeof(context_counters), 1, f);
John Koleszar's avatar
John Koleszar committed
320
321
322
323
324
    fclose(f);
  }

  f = fopen("treeupdate.bin", "rb");
  if (!f) {
325
    vpx_memset(tree_update_hist, 0, sizeof(tree_update_hist));
John Koleszar's avatar
John Koleszar committed
326
  } else {
327
    fread(tree_update_hist, sizeof(tree_update_hist), 1, f);
John Koleszar's avatar
John Koleszar committed
328
329
    fclose(f);
  }
John Koleszar's avatar
John Koleszar committed
330
331
}

332
333
static void print_counter(FILE *f, vp9_coeff_accum *context_counters,
                          int block_types, const char *header) {
334
  int type, ref, band, pt, t;
John Koleszar's avatar
John Koleszar committed
335

336
  fprintf(f, "static const vp9_coeff_count %s = {\n", header);
John Koleszar's avatar
John Koleszar committed
337

338
#define Comma(X) (X ? "," : "")
John Koleszar's avatar
John Koleszar committed
339
340
  type = 0;
  do {
341
    ref = 0;
John Koleszar's avatar
John Koleszar committed
342
343
    fprintf(f, "%s\n  { /* block Type %d */", Comma(type), type);
    do {
344
345
      fprintf(f, "%s\n    { /* %s */", Comma(type), ref ? "Inter" : "Intra");
      band = 0;
John Koleszar's avatar
John Koleszar committed
346
      do {
347
348
        fprintf(f, "%s\n      { /* Coeff Band %d */", Comma(band), band);
        pt = 0;
John Koleszar's avatar
John Koleszar committed
349
        do {
350
351
352
353
354
355
356
357
358
          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);
359
          } while (++t < 1 + MAX_ENTROPY_TOKENS);
360
361
362
363
          fprintf(f, "}");
        } while (++pt < PREV_COEF_CONTEXTS);
        fprintf(f, "\n      }");
      } while (++band < COEF_BANDS);
John Koleszar's avatar
John Koleszar committed
364
      fprintf(f, "\n    }");
365
    } while (++ref < REF_TYPES);
John Koleszar's avatar
John Koleszar committed
366
    fprintf(f, "\n  }");
367
  } while (++type < block_types);
Daniel Kang's avatar
Daniel Kang committed
368
  fprintf(f, "\n};\n");
369
}
370

371
372
static void print_probs(FILE *f, vp9_coeff_accum *context_counters,
                        int block_types, const char *header) {
373
  int type, ref, band, pt, t;
Daniel Kang's avatar
Daniel Kang committed
374

375
  fprintf(f, "static const vp9_coeff_probs %s = {", header);
376

John Koleszar's avatar
John Koleszar committed
377
  type = 0;
378
#define Newline(x, spaces) (x ? " " : "\n" spaces)
John Koleszar's avatar
John Koleszar committed
379
  do {
380
381
    fprintf(f, "%s%s{ /* block Type %d */",
            Comma(type), Newline(type, "  "), type);
382
    ref = 0;
John Koleszar's avatar
John Koleszar committed
383
    do {
384
385
386
      fprintf(f, "%s%s{ /* %s */",
              Comma(band), Newline(band, "    "), ref ? "Inter" : "Intra");
      band = 0;
John Koleszar's avatar
John Koleszar committed
387
      do {
388
389
390
        fprintf(f, "%s%s{ /* Coeff Band %d */",
                Comma(band), Newline(band, "      "), band);
        pt = 0;
John Koleszar's avatar
John Koleszar committed
391
        do {
392
          unsigned int branch_ct[ENTROPY_NODES][2];
393
          unsigned int coef_counts[MAX_ENTROPY_TOKENS + 1];
394
395
          vp9_prob coef_probs[ENTROPY_NODES];

396
397
398
          if (pt >= 3 && band == 0)
            break;
          for (t = 0; t < MAX_ENTROPY_TOKENS + 1; ++t)
399
            coef_counts[t] = context_counters[type][ref][band][pt][t];
400
401
          vp9_tree_probs_from_distribution(vp9_coef_tree, coef_probs,
                                           branch_ct, coef_counts, 0);
402
403
          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]);
404
405
406
407
408
409
410
411
412
413
414
          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
415
      fprintf(f, "\n    }");
416
    } while (++ref < REF_TYPES);
John Koleszar's avatar
John Koleszar committed
417
    fprintf(f, "\n  }");
418
  } while (++type < block_types);
John Koleszar's avatar
John Koleszar committed
419
  fprintf(f, "\n};\n");
420
}
421

422
423
void print_context_counters() {
  FILE *f = fopen("vp9_context.c", "w");
424

425
426
  fprintf(f, "#include \"vp9_entropy.h\"\n");
  fprintf(f, "\n/* *** GENERATED FILE: DO NOT EDIT *** */\n\n");
John Koleszar's avatar
John Koleszar committed
427

428
  /* print counts */
429
  print_counter(f, context_counters[TX_4X4], BLOCK_TYPES,
430
                "vp9_default_coef_counts_4x4[BLOCK_TYPES]");
431
  print_counter(f, context_counters[TX_8X8], BLOCK_TYPES,
432
                "vp9_default_coef_counts_8x8[BLOCK_TYPES]");
433
  print_counter(f, context_counters[TX_16X16], BLOCK_TYPES,
434
                "vp9_default_coef_counts_16x16[BLOCK_TYPES]");
435
  print_counter(f, context_counters[TX_32X32], BLOCK_TYPES,
436
                "vp9_default_coef_counts_32x32[BLOCK_TYPES]");
Daniel Kang's avatar
Daniel Kang committed
437

438
  /* print coefficient probabilities */
439
  print_probs(f, context_counters[TX_4X4], BLOCK_TYPES,
440
              "default_coef_probs_4x4[BLOCK_TYPES]");
441
  print_probs(f, context_counters[TX_8X8], BLOCK_TYPES,
442
              "default_coef_probs_8x8[BLOCK_TYPES]");
443
  print_probs(f, context_counters[TX_16X16], BLOCK_TYPES,
444
              "default_coef_probs_16x16[BLOCK_TYPES]");
445
  print_probs(f, context_counters[TX_32X32], BLOCK_TYPES,
446
              "default_coef_probs_32x32[BLOCK_TYPES]");
Daniel Kang's avatar
Daniel Kang committed
447

John Koleszar's avatar
John Koleszar committed
448
449
450
  fclose(f);

  f = fopen("context.bin", "wb");
451
  fwrite(context_counters, sizeof(context_counters), 1, f);
John Koleszar's avatar
John Koleszar committed
452
  fclose(f);
John Koleszar's avatar
John Koleszar committed
453
454
455
}
#endif

456
void vp9_tokenize_initialize() {
John Koleszar's avatar
John Koleszar committed
457
  fill_value_tokens();
John Koleszar's avatar
John Koleszar committed
458
}