vp9_detokenize.c 19.3 KB
Newer Older
John Koleszar's avatar
John Koleszar committed
1
/*
2
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
John Koleszar's avatar
John Koleszar committed
3
 *
4
 *  Use of this source code is governed by a BSD-style license
5
6
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
7
 *  in the file PATENTS.  All contributing project authors may
8
 *  be found in the AUTHORS file in the root of the source tree.
John Koleszar's avatar
John Koleszar committed
9
10
11
 */


12
#include "vp9/common/vp9_blockd.h"
13
#include "vp9/decoder/vp9_onyxd_int.h"
John Koleszar's avatar
John Koleszar committed
14
15
#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"
16
#include "vp9/decoder/vp9_detokenize.h"
17
#include "vp9/common/vp9_seg_common.h"
18

John Koleszar's avatar
John Koleszar committed
19
20
21
22
23
24
25
26
27
28
29
30
#define EOB_CONTEXT_NODE            0
#define ZERO_CONTEXT_NODE           1
#define ONE_CONTEXT_NODE            2
#define LOW_VAL_CONTEXT_NODE        3
#define TWO_CONTEXT_NODE            4
#define THREE_CONTEXT_NODE          5
#define HIGH_LOW_CONTEXT_NODE       6
#define CAT_ONE_CONTEXT_NODE        7
#define CAT_THREEFOUR_CONTEXT_NODE  8
#define CAT_THREE_CONTEXT_NODE      9
#define CAT_FIVE_CONTEXT_NODE       10

Scott LaVarnway's avatar
Scott LaVarnway committed
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
#define CAT1_MIN_VAL    5
#define CAT2_MIN_VAL    7
#define CAT3_MIN_VAL   11
#define CAT4_MIN_VAL   19
#define CAT5_MIN_VAL   35
#define CAT6_MIN_VAL   67
#define CAT1_PROB0    159
#define CAT2_PROB0    145
#define CAT2_PROB1    165

#define CAT3_PROB0 140
#define CAT3_PROB1 148
#define CAT3_PROB2 173

#define CAT4_PROB0 135
#define CAT4_PROB1 140
#define CAT4_PROB2 155
#define CAT4_PROB3 176

#define CAT5_PROB0 130
#define CAT5_PROB1 134
#define CAT5_PROB2 141
#define CAT5_PROB3 157
#define CAT5_PROB4 180

56
57
58
static const unsigned char cat6_prob[15] = {
  254, 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0
};
John Koleszar's avatar
John Koleszar committed
59

60
DECLARE_ALIGNED(16, extern const unsigned char, vp9_norm[256]);
61

62
static int get_signed(BOOL_DECODER *br, int value_to_sign) {
John Koleszar's avatar
John Koleszar committed
63
  const int split = (br->range + 1) >> 1;
64
  const VP9_BD_VALUE bigsplit = (VP9_BD_VALUE)split << (VP9_BD_VALUE_SIZE - 8);
John Koleszar's avatar
John Koleszar committed
65
  int v;
John Koleszar's avatar
John Koleszar committed
66

John Koleszar's avatar
John Koleszar committed
67
  if (br->count < 0)
68
    vp9_bool_decoder_fill(br);
John Koleszar's avatar
John Koleszar committed
69

John Koleszar's avatar
John Koleszar committed
70
71
72
73
74
75
76
77
78
79
80
  if (br->value < bigsplit) {
    br->range = split;
    v = value_to_sign;
  } else {
    br->range = br->range - split;
    br->value = br->value - bigsplit;
    v = -value_to_sign;
  }
  br->range += br->range;
  br->value += br->value;
  --br->count;
Fritz Koenig's avatar
Fritz Koenig committed
81

John Koleszar's avatar
John Koleszar committed
82
  return v;
Daniel Kang's avatar
Daniel Kang committed
83
}
John Koleszar's avatar
John Koleszar committed
84

85
86
87
88
#define INCREMENT_COUNT(token)                     \
  do {                                             \
    coef_counts[type][coef_bands[c]][pt][token]++; \
    pt = vp9_prev_token_class[token];              \
89
90
91
  } while (0)

#define WRITE_COEF_CONTINUE(val, token)                       \
Daniel Kang's avatar
Daniel Kang committed
92
  {                                                           \
John Koleszar's avatar
John Koleszar committed
93
    qcoeff_ptr[scan[c]] = (int16_t) get_signed(br, val);        \
94
    INCREMENT_COUNT(token);                                   \
John Koleszar's avatar
John Koleszar committed
95
96
97
    c++;                                                      \
    continue;                                                 \
  }
John Koleszar's avatar
John Koleszar committed
98

Daniel Kang's avatar
Daniel Kang committed
99
100
#define ADJUST_COEF(prob, bits_count)  \
  do {                                 \
101
    if (vp9_read(br, prob))            \
John Koleszar's avatar
John Koleszar committed
102
      val += (uint16_t)(1 << bits_count);\
John Koleszar's avatar
John Koleszar committed
103
  } while (0);
John Koleszar's avatar
John Koleszar committed
104

105
static int decode_coefs(VP9D_COMP *dx, const MACROBLOCKD *xd,
John Koleszar's avatar
John Koleszar committed
106
107
108
109
                        BOOL_DECODER* const br,
                        ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l,
                        PLANE_TYPE type,
                        TX_TYPE tx_type,
John Koleszar's avatar
John Koleszar committed
110
                        int seg_eob, int16_t *qcoeff_ptr,
111
                        const int *const scan, TX_SIZE txfm_size,
John Koleszar's avatar
John Koleszar committed
112
                        const int *coef_bands) {
John Koleszar's avatar
John Koleszar committed
113
  FRAME_CONTEXT *const fc = &dx->common.fc;
114
  int pt, c = (type == PLANE_TYPE_Y_NO_DC);
115
116
117
  vp9_coeff_probs *coef_probs;
  vp9_prob *prob;
  vp9_coeff_count *coef_counts;
Daniel Kang's avatar
Daniel Kang committed
118

119
  switch (txfm_size) {
Daniel Kang's avatar
Daniel Kang committed
120
    default:
Daniel Kang's avatar
Daniel Kang committed
121
    case TX_4X4:
122
      if (tx_type == DCT_DCT) {
123
124
        coef_probs  = fc->coef_probs_4x4;
        coef_counts = fc->coef_counts_4x4;
125
      } else {
126
127
        coef_probs  = fc->hybrid_coef_probs_4x4;
        coef_counts = fc->hybrid_coef_counts_4x4;
128
      }
Daniel Kang's avatar
Daniel Kang committed
129
130
      break;
    case TX_8X8:
131
      if (tx_type == DCT_DCT) {
132
133
        coef_probs  = fc->coef_probs_8x8;
        coef_counts = fc->coef_counts_8x8;
134
      } else {
135
136
        coef_probs  = fc->hybrid_coef_probs_8x8;
        coef_counts = fc->hybrid_coef_counts_8x8;
137
      }
Daniel Kang's avatar
Daniel Kang committed
138
      break;
Daniel Kang's avatar
Daniel Kang committed
139
    case TX_16X16:
140
      if (tx_type == DCT_DCT) {
141
142
        coef_probs  = fc->coef_probs_16x16;
        coef_counts = fc->coef_counts_16x16;
143
      } else {
144
145
        coef_probs  = fc->hybrid_coef_probs_16x16;
        coef_counts = fc->hybrid_coef_counts_16x16;
146
      }
Daniel Kang's avatar
Daniel Kang committed
147
      break;
148
149
#if CONFIG_TX32X32 && CONFIG_SUPERBLOCKS
    case TX_32X32:
150
151
      coef_probs = fc->coef_probs_32x32;
      coef_counts = fc->coef_counts_32x32;
152
153
      break;
#endif
Daniel Kang's avatar
Daniel Kang committed
154
  }
John Koleszar's avatar
John Koleszar committed
155

156
  VP9_COMBINEENTROPYCONTEXTS(pt, *a, *l);
John Koleszar's avatar
John Koleszar committed
157
158
159
  while (1) {
    int val;
    const uint8_t *cat6 = cat6_prob;
160
    if (c >= seg_eob) break;
161
    prob = coef_probs[type][coef_bands[c]][pt];
162
    if (!vp9_read(br, prob[EOB_CONTEXT_NODE]))
John Koleszar's avatar
John Koleszar committed
163
      break;
Daniel Kang's avatar
Daniel Kang committed
164
SKIP_START:
165
    if (c >= seg_eob) break;
166
    if (!vp9_read(br, prob[ZERO_CONTEXT_NODE])) {
167
      INCREMENT_COUNT(ZERO_TOKEN);
John Koleszar's avatar
John Koleszar committed
168
      ++c;
169
      prob = coef_probs[type][coef_bands[c]][pt];
John Koleszar's avatar
John Koleszar committed
170
171
172
      goto SKIP_START;
    }
    // ONE_CONTEXT_NODE_0_
173
    if (!vp9_read(br, prob[ONE_CONTEXT_NODE])) {
174
      WRITE_COEF_CONTINUE(1, ONE_TOKEN);
John Koleszar's avatar
John Koleszar committed
175
176
    }
    // LOW_VAL_CONTEXT_NODE_0_
177
178
    if (!vp9_read(br, prob[LOW_VAL_CONTEXT_NODE])) {
      if (!vp9_read(br, prob[TWO_CONTEXT_NODE])) {
179
        WRITE_COEF_CONTINUE(2, TWO_TOKEN);
John Koleszar's avatar
John Koleszar committed
180
      }
181
      if (!vp9_read(br, prob[THREE_CONTEXT_NODE])) {
182
        WRITE_COEF_CONTINUE(3, THREE_TOKEN);
John Koleszar's avatar
John Koleszar committed
183
      }
184
      WRITE_COEF_CONTINUE(4, FOUR_TOKEN);
John Koleszar's avatar
John Koleszar committed
185
186
    }
    // HIGH_LOW_CONTEXT_NODE_0_
187
188
    if (!vp9_read(br, prob[HIGH_LOW_CONTEXT_NODE])) {
      if (!vp9_read(br, prob[CAT_ONE_CONTEXT_NODE])) {
John Koleszar's avatar
John Koleszar committed
189
190
        val = CAT1_MIN_VAL;
        ADJUST_COEF(CAT1_PROB0, 0);
191
        WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY1);
John Koleszar's avatar
John Koleszar committed
192
193
194
195
      }
      val = CAT2_MIN_VAL;
      ADJUST_COEF(CAT2_PROB1, 1);
      ADJUST_COEF(CAT2_PROB0, 0);
196
      WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY2);
Daniel Kang's avatar
Daniel Kang committed
197
    }
John Koleszar's avatar
John Koleszar committed
198
    // CAT_THREEFOUR_CONTEXT_NODE_0_
199
200
    if (!vp9_read(br, prob[CAT_THREEFOUR_CONTEXT_NODE])) {
      if (!vp9_read(br, prob[CAT_THREE_CONTEXT_NODE])) {
John Koleszar's avatar
John Koleszar committed
201
202
203
204
        val = CAT3_MIN_VAL;
        ADJUST_COEF(CAT3_PROB2, 2);
        ADJUST_COEF(CAT3_PROB1, 1);
        ADJUST_COEF(CAT3_PROB0, 0);
205
        WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY3);
John Koleszar's avatar
John Koleszar committed
206
207
208
209
210
211
      }
      val = CAT4_MIN_VAL;
      ADJUST_COEF(CAT4_PROB3, 3);
      ADJUST_COEF(CAT4_PROB2, 2);
      ADJUST_COEF(CAT4_PROB1, 1);
      ADJUST_COEF(CAT4_PROB0, 0);
212
      WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY4);
John Koleszar's avatar
John Koleszar committed
213
214
    }
    // CAT_FIVE_CONTEXT_NODE_0_:
215
    if (!vp9_read(br, prob[CAT_FIVE_CONTEXT_NODE])) {
John Koleszar's avatar
John Koleszar committed
216
217
218
219
220
221
      val = CAT5_MIN_VAL;
      ADJUST_COEF(CAT5_PROB4, 4);
      ADJUST_COEF(CAT5_PROB3, 3);
      ADJUST_COEF(CAT5_PROB2, 2);
      ADJUST_COEF(CAT5_PROB1, 1);
      ADJUST_COEF(CAT5_PROB0, 0);
222
      WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY5);
John Koleszar's avatar
John Koleszar committed
223
224
225
    }
    val = 0;
    while (*cat6) {
226
      val = (val << 1) | vp9_read(br, *cat6++);
John Koleszar's avatar
John Koleszar committed
227
228
    }
    val += CAT6_MIN_VAL;
229
    WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6);
John Koleszar's avatar
John Koleszar committed
230
  }
Jingning Han's avatar
Jingning Han committed
231

232
  if (c < seg_eob)
233
    coef_counts[type][coef_bands[c]][pt][DCT_EOB_TOKEN]++;
234

235
  a[0] = l[0] = (c > !type);
236

John Koleszar's avatar
John Koleszar committed
237
  return c;
Daniel Kang's avatar
Daniel Kang committed
238
}
John Koleszar's avatar
John Koleszar committed
239

240
static int get_eob(MACROBLOCKD* const xd, int segment_id, int eob_max) {
241
242
243
244
245
246
247
248
  int active = vp9_segfeature_active(xd, segment_id, SEG_LVL_EOB);
  int eob = vp9_get_segdata(xd, segment_id, SEG_LVL_EOB);

  if (!active || eob > eob_max)
    eob = eob_max;
  return eob;
}

249
250
251
252
253
254
#if CONFIG_TX32X32 && CONFIG_SUPERBLOCKS
int vp9_decode_sb_tokens(VP9D_COMP* const pbi,
                         MACROBLOCKD* const xd,
                         BOOL_DECODER* const bc) {
  ENTROPY_CONTEXT* const A = (ENTROPY_CONTEXT *)xd->above_context;
  ENTROPY_CONTEXT* const L = (ENTROPY_CONTEXT *)xd->left_context;
255
256
  ENTROPY_CONTEXT* const A1 = (ENTROPY_CONTEXT *)(&xd->above_context[1]);
  ENTROPY_CONTEXT* const L1 = (ENTROPY_CONTEXT *)(&xd->left_context[1]);
257
258
259
260
261
  unsigned short* const eobs = xd->eobs;
  const int segment_id = xd->mode_info_context->mbmi.segment_id;
  int c, i, eobtotal = 0, seg_eob;

  // Luma block
262
263
264
265
266
267
268
269
270
271
272
#if CONFIG_CNVCONTEXT
  ENTROPY_CONTEXT above_ec = (A[0] + A[1] + A[2] + A[3] +
                              A1[0] + A1[1] + A1[2] + A1[3]) != 0;
  ENTROPY_CONTEXT left_ec =  (L[0] + L[1] + L[2] + L[3] +
                              L1[0] + L1[1] + L1[2] + L1[3]) != 0;
#else
  ENTROPY_CONTEXT above_ec = A[0];
  ENTROPY_CONTEXT left_ec =  L[0];
#endif
  eobs[0] = c = decode_coefs(pbi, xd, bc, &above_ec, &left_ec,
                             PLANE_TYPE_Y_WITH_DC,
273
274
275
276
                             DCT_DCT, get_eob(xd, segment_id, 1024),
                             xd->sb_coeff_data.qcoeff,
                             vp9_default_zig_zag1d_32x32,
                             TX_32X32, vp9_coef_bands_32x32);
277
278
279
280
281
  A[1] = A[2] = A[3] = A[0] = above_ec;
  L[1] = L[2] = L[3] = L[0] = left_ec;
  A1[1] = A1[2] = A1[3] = A1[0] = above_ec;
  L1[1] = L1[2] = L1[3] = L1[0] = left_ec;

282
283
284
285
  eobtotal += c;

  // 16x16 chroma blocks
  seg_eob = get_eob(xd, segment_id, 256);
286

287
  for (i = 16; i < 24; i += 4) {
288
289
    ENTROPY_CONTEXT* const a = A + vp9_block2above[TX_16X16][i];
    ENTROPY_CONTEXT* const l = L + vp9_block2left[TX_16X16][i];
290
291
292
293
294
295
296
297
298
    ENTROPY_CONTEXT* const a1 = A1 + vp9_block2above[TX_16X16][i];
    ENTROPY_CONTEXT* const l1 = L1 + vp9_block2left[TX_16X16][i];
#if CONFIG_CNVCONTEXT
    above_ec = (a[0] + a[1] + a1[0] + a1[1]) != 0;
    left_ec = (l[0] + l[1] + l1[0] + l1[1]) != 0;
#else
    above_ec = a[0];
    left_ec = l[0];
#endif
299

300
301
302
    eobs[i] = c = decode_coefs(pbi, xd, bc,
                               &above_ec, &left_ec,
                               PLANE_TYPE_UV,
303
304
305
306
                               DCT_DCT, seg_eob,
                               xd->sb_coeff_data.qcoeff + 1024 + (i - 16) * 64,
                               vp9_default_zig_zag1d_16x16,
                               TX_16X16, vp9_coef_bands_16x16);
307
308
309

    a1[1] = a1[0] = a[1] = a[0] = above_ec;
    l1[1] = l1[0] = l[1] = l[0] = left_ec;
310
311
312
    eobtotal += c;
  }
  // no Y2 block
313
  A[8] = L[8] = A1[8] = L1[8] = 0;
314
315
316
  return eobtotal;
}
#endif
317

318
319
320
static int vp9_decode_mb_tokens_16x16(VP9D_COMP* const pbi,
                                      MACROBLOCKD* const xd,
                                      BOOL_DECODER* const bc) {
Daniel Kang's avatar
Daniel Kang committed
321
322
  ENTROPY_CONTEXT* const A = (ENTROPY_CONTEXT *)xd->above_context;
  ENTROPY_CONTEXT* const L = (ENTROPY_CONTEXT *)xd->left_context;
Yunqing Wang's avatar
Yunqing Wang committed
323
  unsigned short* const eobs = xd->eobs;
Daniel Kang's avatar
Daniel Kang committed
324
  const int segment_id = xd->mode_info_context->mbmi.segment_id;
325
  int c, i, eobtotal = 0, seg_eob;
Daniel Kang's avatar
Daniel Kang committed
326
  // Luma block
Yaowu Xu's avatar
Yaowu Xu committed
327
328
329
330
331
332
333
334
335
336

#if CONFIG_CNVCONTEXT
  ENTROPY_CONTEXT above_ec = (A[0] + A[1] + A[2] + A[3]) != 0;
  ENTROPY_CONTEXT left_ec = (L[0] + L[1] + L[2] + L[3]) != 0;
#else
  ENTROPY_CONTEXT above_ec = A[0];
  ENTROPY_CONTEXT left_ec = L[0];
#endif
  eobs[0] = c = decode_coefs(pbi, xd, bc, &above_ec, &left_ec,
                             PLANE_TYPE_Y_WITH_DC,
337
338
339
340
                             get_tx_type(xd, &xd->block[0]),
                             get_eob(xd, segment_id, 256),
                             xd->qcoeff, vp9_default_zig_zag1d_16x16,
                             TX_16X16, vp9_coef_bands_16x16);
Yaowu Xu's avatar
Yaowu Xu committed
341
342
  A[1] = A[2] = A[3] = A[0] = above_ec;
  L[1] = L[2] = L[3] = L[0] = left_ec;
343
  eobtotal += c;
Daniel Kang's avatar
Daniel Kang committed
344
345

  // 8x8 chroma blocks
346
  seg_eob = get_eob(xd, segment_id, 64);
Daniel Kang's avatar
Daniel Kang committed
347
  for (i = 16; i < 24; i += 4) {
Yaowu Xu's avatar
Yaowu Xu committed
348
349
    ENTROPY_CONTEXT* const a = A + vp9_block2above[TX_8X8][i];
    ENTROPY_CONTEXT* const l = L + vp9_block2left[TX_8X8][i];
Yaowu Xu's avatar
Yaowu Xu committed
350
351
352
353
354
355
356
357
358
359
#if CONFIG_CNVCONTEXT
    above_ec = (a[0] + a[1]) != 0;
    left_ec = (l[0] + l[1]) != 0;
#else
    above_ec = a[0];
    left_ec = l[0];
#endif
    eobs[i] = c = decode_coefs(pbi, xd, bc,
                               &above_ec, &left_ec,
                               PLANE_TYPE_UV,
360
361
362
                               DCT_DCT, seg_eob, xd->block[i].qcoeff,
                               vp9_default_zig_zag1d_8x8,
                               TX_8X8, vp9_coef_bands_8x8);
Yaowu Xu's avatar
Yaowu Xu committed
363
364
    a[1] = a[0] = above_ec;
    l[1] = l[0] = left_ec;
Daniel Kang's avatar
Daniel Kang committed
365
366
    eobtotal += c;
  }
367
368
  A[8] = 0;
  L[8] = 0;
Daniel Kang's avatar
Daniel Kang committed
369
370
371
  return eobtotal;
}

372
373
374
static int vp9_decode_mb_tokens_8x8(VP9D_COMP* const pbi,
                                    MACROBLOCKD* const xd,
                                    BOOL_DECODER* const bc) {
John Koleszar's avatar
John Koleszar committed
375
376
  ENTROPY_CONTEXT *const A = (ENTROPY_CONTEXT *)xd->above_context;
  ENTROPY_CONTEXT *const L = (ENTROPY_CONTEXT *)xd->left_context;
Yunqing Wang's avatar
Yunqing Wang committed
377
  unsigned short *const eobs = xd->eobs;
378
379
  PLANE_TYPE type;
  int c, i, eobtotal = 0, seg_eob;
John Koleszar's avatar
John Koleszar committed
380
  const int segment_id = xd->mode_info_context->mbmi.segment_id;
381

382
  int has_2nd_order = get_2nd_order_usage(xd);
383
  // 2nd order DC block
384
  if (has_2nd_order) {
Yaowu Xu's avatar
Yaowu Xu committed
385
386
    ENTROPY_CONTEXT *const a = A + vp9_block2above[TX_8X8][24];
    ENTROPY_CONTEXT *const l = L + vp9_block2left[TX_8X8][24];
John Koleszar's avatar
John Koleszar committed
387

388
389
390
    eobs[24] = c = decode_coefs(pbi, xd, bc, a, l, PLANE_TYPE_Y2,
                                DCT_DCT, get_eob(xd, segment_id, 4),
                                xd->block[24].qcoeff,
391
392
                                vp9_default_zig_zag1d_4x4, TX_8X8,
                                vp9_coef_bands_4x4);
John Koleszar's avatar
John Koleszar committed
393
394
    eobtotal += c - 4;
    type = PLANE_TYPE_Y_NO_DC;
395
  } else {
Yaowu Xu's avatar
Yaowu Xu committed
396
397
    xd->above_context->y2 = 0;
    xd->left_context->y2 = 0;
398
    eobs[24] = 0;
John Koleszar's avatar
John Koleszar committed
399
    type = PLANE_TYPE_Y_WITH_DC;
400
  }
John Koleszar's avatar
John Koleszar committed
401

402
  // luma blocks
403
  seg_eob = get_eob(xd, segment_id, 64);
404
  for (i = 0; i < 16; i += 4) {
Yaowu Xu's avatar
Yaowu Xu committed
405
406
    ENTROPY_CONTEXT *const a = A + vp9_block2above[TX_8X8][i];
    ENTROPY_CONTEXT *const l = L + vp9_block2left[TX_8X8][i];
Yaowu Xu's avatar
Yaowu Xu committed
407
408
409
410
411
412
413
414
#if CONFIG_CNVCONTEXT
    ENTROPY_CONTEXT above_ec = (a[0] + a[1]) != 0;
    ENTROPY_CONTEXT left_ec = (l[0] + l[1]) != 0;
#else
    ENTROPY_CONTEXT above_ec = a[0];
    ENTROPY_CONTEXT left_ec = l[0];
#endif
    eobs[i] = c = decode_coefs(pbi, xd, bc, &above_ec, &left_ec, type,
415
                               type == PLANE_TYPE_Y_WITH_DC ?
416
                               get_tx_type(xd, xd->block + i) : DCT_DCT,
417
418
419
                               seg_eob, xd->block[i].qcoeff,
                               vp9_default_zig_zag1d_8x8,
                               TX_8X8, vp9_coef_bands_8x8);
Yaowu Xu's avatar
Yaowu Xu committed
420
421
    a[1] = a[0] = above_ec;
    l[1] = l[0] = left_ec;
John Koleszar's avatar
John Koleszar committed
422
423
424
    eobtotal += c;
  }

425
426
427
428
  // chroma blocks
  if (xd->mode_info_context->mbmi.mode == I8X8_PRED ||
      xd->mode_info_context->mbmi.mode == SPLITMV) {
    // use 4x4 transform for U, V components in I8X8/splitmv prediction mode
429
    seg_eob = get_eob(xd, segment_id, 16);
430
    for (i = 16; i < 24; i++) {
Yaowu Xu's avatar
Yaowu Xu committed
431
432
      ENTROPY_CONTEXT *const a = A + vp9_block2above[TX_4X4][i];
      ENTROPY_CONTEXT *const l = L + vp9_block2left[TX_4X4][i];
433

434
435
      eobs[i] = c = decode_coefs(pbi, xd, bc, a, l, PLANE_TYPE_UV,
                                 DCT_DCT, seg_eob, xd->block[i].qcoeff,
436
437
                                 vp9_default_zig_zag1d_4x4, TX_4X4,
                                 vp9_coef_bands_4x4);
438
439
440
441
      eobtotal += c;
    }
  } else {
    for (i = 16; i < 24; i += 4) {
Yaowu Xu's avatar
Yaowu Xu committed
442
443
      ENTROPY_CONTEXT *const a = A + vp9_block2above[TX_8X8][i];
      ENTROPY_CONTEXT *const l = L + vp9_block2left[TX_8X8][i];
Yaowu Xu's avatar
Yaowu Xu committed
444
445
446
447
448
449
450
451
452
453
#if CONFIG_CNVCONTEXT
      ENTROPY_CONTEXT above_ec = (a[0] + a[1]) != 0;
      ENTROPY_CONTEXT left_ec = (l[0] + l[1]) != 0;
#else
      ENTROPY_CONTEXT above_ec = a[0];
      ENTROPY_CONTEXT left_ec = l[0];
#endif
      eobs[i] = c = decode_coefs(pbi, xd, bc,
                                 &above_ec, &left_ec,
                                 PLANE_TYPE_UV,
454
455
456
                                 DCT_DCT, seg_eob, xd->block[i].qcoeff,
                                 vp9_default_zig_zag1d_8x8,
                                 TX_8X8, vp9_coef_bands_8x8);
Yaowu Xu's avatar
Yaowu Xu committed
457
458
      a[1] = a[0] = above_ec;
      l[1] = l[0] = left_ec;
459
460
461
462
      eobtotal += c;
    }
  }

John Koleszar's avatar
John Koleszar committed
463
  return eobtotal;
464
465
}

466
467
468
469
static int decode_coefs_4x4(VP9D_COMP *dx, MACROBLOCKD *xd,
                            BOOL_DECODER* const bc,
                            PLANE_TYPE type, int i, int seg_eob,
                            TX_TYPE tx_type, const int *scan) {
John Koleszar's avatar
John Koleszar committed
470
471
  ENTROPY_CONTEXT *const A = (ENTROPY_CONTEXT *)xd->above_context;
  ENTROPY_CONTEXT *const L = (ENTROPY_CONTEXT *)xd->left_context;
Yaowu Xu's avatar
Yaowu Xu committed
472
473
  ENTROPY_CONTEXT *const a = A + vp9_block2above[TX_4X4][i];
  ENTROPY_CONTEXT *const l = L + vp9_block2left[TX_4X4][i];
474
  unsigned short *const eobs = xd->eobs;
475
476
477
  int c;

  c = decode_coefs(dx, xd, bc, a, l, type, tx_type, seg_eob,
478
                   xd->block[i].qcoeff, scan, TX_4X4, vp9_coef_bands_4x4);
479
480
481
482
483
484
485
486
487
488
489
  eobs[i] = c;

  return c;
}

static int decode_coefs_4x4_y(VP9D_COMP *dx, MACROBLOCKD *xd,
                              BOOL_DECODER* const bc,
                              PLANE_TYPE type, int i, int seg_eob) {
  const TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
                          get_tx_type(xd, &xd->block[i]) : DCT_DCT;
  const int *scan;
490
491

  switch (tx_type) {
492
    case ADST_DCT:
493
      scan = vp9_row_scan_4x4;
494
      break;
495
    case DCT_ADST:
496
      scan = vp9_col_scan_4x4;
497
      break;
498
    default:
499
      scan = vp9_default_zig_zag1d_4x4;
500
501
      break;
  }
502
503

  return decode_coefs_4x4(dx, xd, bc, type, i, seg_eob, tx_type, scan);
504
505
}

506
507
508
509
510
511
512
513
514
515
516
517
518
int vp9_decode_coefs_4x4(VP9D_COMP *dx, MACROBLOCKD *xd,
                         BOOL_DECODER* const bc,
                         PLANE_TYPE type, int i) {
  const int segment_id = xd->mode_info_context->mbmi.segment_id;
  const int seg_eob = get_eob(xd, segment_id, 16);

  return decode_coefs_4x4_y(dx, xd, bc, type, i, seg_eob);
}

static int decode_mb_tokens_4x4_uv(VP9D_COMP* const dx,
                                   MACROBLOCKD* const xd,
                                   BOOL_DECODER* const bc,
                                   int seg_eob) {
519
520
  int eobtotal = 0, i;

521
522
523
  // chroma blocks
  for (i = 16; i < 24; i++) {
    eobtotal += decode_coefs_4x4(dx, xd, bc, PLANE_TYPE_UV, i, seg_eob,
524
                                 DCT_DCT, vp9_default_zig_zag1d_4x4);
525
  }
526
527
528
529

  return eobtotal;
}

530
531
532
533
534
535
536
537
538
int vp9_decode_mb_tokens_4x4_uv(VP9D_COMP* const dx,
                                MACROBLOCKD* const xd,
                                BOOL_DECODER* const bc) {
  const int segment_id = xd->mode_info_context->mbmi.segment_id;
  const int seg_eob = get_eob(xd, segment_id, 16);

  return decode_mb_tokens_4x4_uv(dx, xd, bc, seg_eob);
}

539
540
541
static int vp9_decode_mb_tokens_4x4(VP9D_COMP* const dx,
                                    MACROBLOCKD* const xd,
                                    BOOL_DECODER* const bc) {
542
543
  int i, eobtotal = 0;
  PLANE_TYPE type;
544
545
546
  const int segment_id = xd->mode_info_context->mbmi.segment_id;
  const int seg_eob = get_eob(xd, segment_id, 16);
  const int has_2nd_order = get_2nd_order_usage(xd);
547

548
  // 2nd order DC block
549
  if (has_2nd_order) {
550
    eobtotal += decode_coefs_4x4(dx, xd, bc, PLANE_TYPE_Y2, 24, seg_eob,
551
                                 DCT_DCT, vp9_default_zig_zag1d_4x4) - 16;
John Koleszar's avatar
John Koleszar committed
552
553
    type = PLANE_TYPE_Y_NO_DC;
  } else {
Yaowu Xu's avatar
Yaowu Xu committed
554
555
    xd->above_context->y2 = 0;
    xd->left_context->y2 = 0;
556
    xd->eobs[24] = 0;
John Koleszar's avatar
John Koleszar committed
557
558
    type = PLANE_TYPE_Y_WITH_DC;
  }
John Koleszar's avatar
John Koleszar committed
559

560
  // luma blocks
561
  for (i = 0; i < 16; ++i) {
562
    eobtotal += decode_coefs_4x4_y(dx, xd, bc, type, i, seg_eob);
John Koleszar's avatar
John Koleszar committed
563
  }
564

565
566
567
568
  // chroma blocks
  eobtotal += decode_mb_tokens_4x4_uv(dx, xd, bc, seg_eob);

  return eobtotal;
John Koleszar's avatar
John Koleszar committed
569
}
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587

int vp9_decode_mb_tokens(VP9D_COMP* const dx,
                         MACROBLOCKD* const xd,
                         BOOL_DECODER* const bc) {
  const TX_SIZE tx_size = xd->mode_info_context->mbmi.txfm_size;
  int eobtotal;

  if (tx_size == TX_16X16) {
    eobtotal = vp9_decode_mb_tokens_16x16(dx, xd, bc);
  } else if (tx_size == TX_8X8) {
    eobtotal = vp9_decode_mb_tokens_8x8(dx, xd, bc);
  } else {
    assert(tx_size == TX_4X4);
    eobtotal = vp9_decode_mb_tokens_4x4(dx, xd, bc);
  }

  return eobtotal;
}