vp9_decodframe.c 64.4 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/decoder/vp9_onyxd_int.h"
Ronald S. Bultje's avatar
Ronald S. Bultje committed
13
#include "vp9/common/vp9_common.h"
14 15 16 17
#include "vp9/common/vp9_header.h"
#include "vp9/common/vp9_reconintra.h"
#include "vp9/common/vp9_reconintra4x4.h"
#include "vp9/common/vp9_reconinter.h"
Yaowu Xu's avatar
Yaowu Xu committed
18
#include "vp9/common/vp9_entropy.h"
19
#include "vp9/decoder/vp9_decodframe.h"
20
#include "vp9/decoder/vp9_detokenize.h"
21 22 23 24
#include "vp9/common/vp9_invtrans.h"
#include "vp9/common/vp9_alloccommon.h"
#include "vp9/common/vp9_entropymode.h"
#include "vp9/common/vp9_quant_common.h"
Johann's avatar
Johann committed
25
#include "vpx_scale/vpx_scale.h"
26
#include "vp9/common/vp9_setupintrarecon.h"
Scott LaVarnway's avatar
Scott LaVarnway committed
27

28
#include "vp9/decoder/vp9_decodemv.h"
29 30
#include "vp9/common/vp9_extend.h"
#include "vp9/common/vp9_modecont.h"
John Koleszar's avatar
John Koleszar committed
31
#include "vpx_mem/vpx_mem.h"
32
#include "vp9/decoder/vp9_dboolhuff.h"
John Koleszar's avatar
John Koleszar committed
33

34
#include "vp9/common/vp9_seg_common.h"
35
#include "vp9_rtcd.h"
36

John Koleszar's avatar
John Koleszar committed
37 38 39
#include <assert.h>
#include <stdio.h>

40 41
#define COEFCOUNT_TESTING

Yaowu Xu's avatar
Yaowu Xu committed
42
//#define DEC_DEBUG
43 44 45 46
#ifdef DEC_DEBUG
int dec_debug = 0;
#endif

John Koleszar's avatar
John Koleszar committed
47 48 49 50 51 52 53 54 55 56 57 58
static int merge_index(int v, int n, int modulus) {
  int max1 = (n - 1 - modulus / 2) / modulus + 1;
  if (v < max1) v = v * modulus + modulus / 2;
  else {
    int w;
    v -= max1;
    w = v;
    v += (v + modulus - modulus / 2) / modulus;
    while (v % modulus == modulus / 2 ||
           w != v - (v + modulus - modulus / 2) / modulus) v++;
  }
  return v;
59 60
}

John Koleszar's avatar
John Koleszar committed
61 62 63
static int inv_remap_prob(int v, int m) {
  const int n = 256;
  const int modulus = MODULUS_PARAM;
64
  int i;
John Koleszar's avatar
John Koleszar committed
65 66
  v = merge_index(v, n - 1, modulus);
  if ((m << 1) <= n) {
67
    i = vp9_inv_recenter_nonneg(v + 1, m);
John Koleszar's avatar
John Koleszar committed
68
  } else {
69
    i = n - 1 - vp9_inv_recenter_nonneg(v + 1, n - 1 - m);
John Koleszar's avatar
John Koleszar committed
70 71
  }
  return i;
72
}
73

74
static vp9_prob read_prob_diff_update(vp9_reader *const bc, int oldp) {
75
  int delp = vp9_decode_term_subexp(bc, SUBEXP_PARAM, 255);
76
  return (vp9_prob)inv_remap_prob(delp, oldp);
77
}
78

79
void vp9_init_de_quantizer(VP9D_COMP *pbi) {
John Koleszar's avatar
John Koleszar committed
80 81
  int i;
  int Q;
82
  VP9_COMMON *const pc = &pbi->common;
John Koleszar's avatar
John Koleszar committed
83 84

  for (Q = 0; Q < QINDEX_RANGE; Q++) {
85 86 87
    pc->Y1dequant[Q][0] = (int16_t)vp9_dc_quant(Q, pc->y1dc_delta_q);
    pc->Y2dequant[Q][0] = (int16_t)vp9_dc2quant(Q, pc->y2dc_delta_q);
    pc->UVdequant[Q][0] = (int16_t)vp9_dc_uv_quant(Q, pc->uvdc_delta_q);
John Koleszar's avatar
John Koleszar committed
88 89 90

    /* all the ac values =; */
    for (i = 1; i < 16; i++) {
91
      int rc = vp9_default_zig_zag1d_4x4[i];
John Koleszar's avatar
John Koleszar committed
92

93 94 95
      pc->Y1dequant[Q][rc] = (int16_t)vp9_ac_yquant(Q);
      pc->Y2dequant[Q][rc] = (int16_t)vp9_ac2quant(Q, pc->y2ac_delta_q);
      pc->UVdequant[Q][rc] = (int16_t)vp9_ac_uv_quant(Q, pc->uvac_delta_q);
John Koleszar's avatar
John Koleszar committed
96
    }
John Koleszar's avatar
John Koleszar committed
97
  }
John Koleszar's avatar
John Koleszar committed
98 99
}

100
static void mb_init_dequantizer(VP9D_COMP *pbi, MACROBLOCKD *xd) {
John Koleszar's avatar
John Koleszar committed
101 102
  int i;
  int QIndex;
103
  VP9_COMMON *const pc = &pbi->common;
John Koleszar's avatar
John Koleszar committed
104 105 106
  int segment_id = xd->mode_info_context->mbmi.segment_id;

  // Set the Q baseline allowing for any segment level adjustment
107
  if (vp9_segfeature_active(xd, segment_id, SEG_LVL_ALT_Q)) {
John Koleszar's avatar
John Koleszar committed
108 109
    /* Abs Value */
    if (xd->mb_segment_abs_delta == SEGMENT_ABSDATA)
110
      QIndex = vp9_get_segdata(xd, segment_id, SEG_LVL_ALT_Q);
John Koleszar's avatar
John Koleszar committed
111 112 113 114

    /* Delta Value */
    else {
      QIndex = pc->base_qindex +
115
               vp9_get_segdata(xd, segment_id, SEG_LVL_ALT_Q);
John Koleszar's avatar
John Koleszar committed
116
      QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0;    /* Clamp to valid range */
John Koleszar's avatar
John Koleszar committed
117
    }
John Koleszar's avatar
John Koleszar committed
118 119
  } else
    QIndex = pc->base_qindex;
Deb Mukherjee's avatar
Deb Mukherjee committed
120
  xd->q_index = QIndex;
John Koleszar's avatar
John Koleszar committed
121

John Koleszar's avatar
John Koleszar committed
122 123 124 125
  /* Set up the block level dequant pointers */
  for (i = 0; i < 16; i++) {
    xd->block[i].dequant = pc->Y1dequant[QIndex];
  }
John Koleszar's avatar
John Koleszar committed
126

Hui Su's avatar
Hui Su committed
127
#if CONFIG_LOSSLESS
John Koleszar's avatar
John Koleszar committed
128
  if (!QIndex) {
129 130 131 132
    pbi->mb.inv_xform4x4_1_x8     = vp9_short_inv_walsh4x4_1_x8;
    pbi->mb.inv_xform4x4_x8       = vp9_short_inv_walsh4x4_x8;
    pbi->mb.inv_walsh4x4_1        = vp9_short_inv_walsh4x4_1_lossless;
    pbi->mb.inv_walsh4x4_lossless = vp9_short_inv_walsh4x4_lossless;
133 134 135 136 137
    pbi->idct_add            = vp9_dequant_idct_add_lossless_c;
    pbi->dc_idct_add         = vp9_dequant_dc_idct_add_lossless_c;
    pbi->dc_idct_add_y_block = vp9_dequant_dc_idct_add_y_block_lossless_c;
    pbi->idct_add_y_block    = vp9_dequant_idct_add_y_block_lossless_c;
    pbi->idct_add_uv_block   = vp9_dequant_idct_add_uv_block_lossless_c;
John Koleszar's avatar
John Koleszar committed
138
  } else {
139 140 141 142
    pbi->mb.inv_xform4x4_1_x8     = vp9_short_idct4x4llm_1;
    pbi->mb.inv_xform4x4_x8       = vp9_short_idct4x4llm;
    pbi->mb.inv_walsh4x4_1        = vp9_short_inv_walsh4x4_1;
    pbi->mb.inv_walsh4x4_lossless = vp9_short_inv_walsh4x4;
143 144 145 146 147
    pbi->idct_add            = vp9_dequant_idct_add;
    pbi->dc_idct_add         = vp9_dequant_dc_idct_add;
    pbi->dc_idct_add_y_block = vp9_dequant_dc_idct_add_y_block;
    pbi->idct_add_y_block    = vp9_dequant_idct_add_y_block;
    pbi->idct_add_uv_block   = vp9_dequant_idct_add_uv_block;
John Koleszar's avatar
John Koleszar committed
148
  }
Scott LaVarnway's avatar
Scott LaVarnway committed
149
#else
150 151 152 153
  pbi->mb.inv_xform4x4_1_x8     = vp9_short_idct4x4llm_1;
  pbi->mb.inv_xform4x4_x8       = vp9_short_idct4x4llm;
  pbi->mb.inv_walsh4x4_1        = vp9_short_inv_walsh4x4_1;
  pbi->mb.inv_walsh4x4_lossless = vp9_short_inv_walsh4x4;
154 155 156 157 158
  pbi->idct_add            = vp9_dequant_idct_add;
  pbi->dc_idct_add         = vp9_dequant_dc_idct_add;
  pbi->dc_idct_add_y_block = vp9_dequant_dc_idct_add_y_block;
  pbi->idct_add_y_block    = vp9_dequant_idct_add_y_block;
  pbi->idct_add_uv_block   = vp9_dequant_idct_add_uv_block;
Hui Su's avatar
Hui Su committed
159 160
#endif

John Koleszar's avatar
John Koleszar committed
161 162 163
  for (i = 16; i < 24; i++) {
    xd->block[i].dequant = pc->UVdequant[QIndex];
  }
John Koleszar's avatar
John Koleszar committed
164

John Koleszar's avatar
John Koleszar committed
165
  xd->block[24].dequant = pc->Y2dequant[QIndex];
John Koleszar's avatar
John Koleszar committed
166 167 168

}

169 170 171
/* skip_recon_mb() is Modified: Instead of writing the result to predictor buffer and then copying it
 *  to dst buffer, we can write the result directly to dst buffer. This eliminates unnecessary copy.
 */
172
static void skip_recon_mb(VP9D_COMP *pbi, MACROBLOCKD *xd) {
John Koleszar's avatar
John Koleszar committed
173
  if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) {
Ronald S. Bultje's avatar
Ronald S. Bultje committed
174 175 176
    if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB64X64) {
      vp9_build_intra_predictors_sb64uv_s(xd);
      vp9_build_intra_predictors_sb64y_s(xd);
177
    } else if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB32X32) {
178 179
      vp9_build_intra_predictors_sbuv_s(xd);
      vp9_build_intra_predictors_sby_s(xd);
180
    } else {
Ronald S. Bultje's avatar
Ronald S. Bultje committed
181 182
      vp9_build_intra_predictors_mbuv_s(xd);
      vp9_build_intra_predictors_mby_s(xd);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
183
    }
John Koleszar's avatar
John Koleszar committed
184
  } else {
Ronald S. Bultje's avatar
Ronald S. Bultje committed
185 186 187 188 189 190 191
    if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB64X64) {
      vp9_build_inter64x64_predictors_sb(xd,
                                         xd->dst.y_buffer,
                                         xd->dst.u_buffer,
                                         xd->dst.v_buffer,
                                         xd->dst.y_stride,
                                         xd->dst.uv_stride);
192
    } else if (xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB32X32) {
193 194 195 196 197 198
      vp9_build_inter32x32_predictors_sb(xd,
                                         xd->dst.y_buffer,
                                         xd->dst.u_buffer,
                                         xd->dst.v_buffer,
                                         xd->dst.y_stride,
                                         xd->dst.uv_stride);
199
    } else {
Ronald S. Bultje's avatar
Ronald S. Bultje committed
200
      vp9_build_1st_inter16x16_predictors_mb(xd,
201 202 203 204 205
                                             xd->dst.y_buffer,
                                             xd->dst.u_buffer,
                                             xd->dst.v_buffer,
                                             xd->dst.y_stride,
                                             xd->dst.uv_stride);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
206 207 208

      if (xd->mode_info_context->mbmi.second_ref_frame > 0) {
        vp9_build_2nd_inter16x16_predictors_mb(xd,
209 210 211 212 213
                                               xd->dst.y_buffer,
                                               xd->dst.u_buffer,
                                               xd->dst.v_buffer,
                                               xd->dst.y_stride,
                                               xd->dst.uv_stride);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
214 215 216 217 218 219 220 221 222 223
      }
#if CONFIG_COMP_INTERINTRA_PRED
      else if (xd->mode_info_context->mbmi.second_ref_frame == INTRA_FRAME) {
        vp9_build_interintra_16x16_predictors_mb(xd,
                                                 xd->dst.y_buffer,
                                                 xd->dst.u_buffer,
                                                 xd->dst.v_buffer,
                                                 xd->dst.y_stride,
                                                 xd->dst.uv_stride);
      }
224
#endif
Ronald S. Bultje's avatar
Ronald S. Bultje committed
225
    }
John Koleszar's avatar
John Koleszar committed
226
  }
John Koleszar's avatar
John Koleszar committed
227 228
}

229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253
static void decode_16x16(VP9D_COMP *pbi, MACROBLOCKD *xd,
                         BOOL_DECODER* const bc) {
  BLOCKD *bd = &xd->block[0];
  TX_TYPE tx_type = get_tx_type_16x16(xd, bd);
  assert(get_2nd_order_usage(xd) == 0);
#ifdef DEC_DEBUG
  if (dec_debug) {
    int i;
    printf("\n");
    printf("qcoeff 16x16\n");
    for (i = 0; i < 400; i++) {
      printf("%3d ", xd->qcoeff[i]);
      if (i % 16 == 15) printf("\n");
    }
    printf("\n");
    printf("predictor\n");
    for (i = 0; i < 400; i++) {
      printf("%3d ", xd->predictor[i]);
      if (i % 16 == 15) printf("\n");
    }
  }
#endif
  if (tx_type != DCT_DCT) {
    vp9_ht_dequant_idct_add_16x16_c(tx_type, xd->qcoeff,
                                    xd->block[0].dequant, xd->predictor,
Scott LaVarnway's avatar
Scott LaVarnway committed
254 255
                                    xd->dst.y_buffer, 16, xd->dst.y_stride,
                                    xd->eobs[0]);
256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288
  } else {
    vp9_dequant_idct_add_16x16(xd->qcoeff, xd->block[0].dequant,
                               xd->predictor, xd->dst.y_buffer,
                               16, xd->dst.y_stride, xd->eobs[0]);
  }
  vp9_dequant_idct_add_uv_block_8x8(
      xd->qcoeff + 16 * 16, xd->block[16].dequant,
      xd->predictor + 16 * 16, xd->dst.u_buffer, xd->dst.v_buffer,
      xd->dst.uv_stride, xd->eobs + 16, xd);
}

static void decode_8x8(VP9D_COMP *pbi, MACROBLOCKD *xd,
                       BOOL_DECODER* const bc) {
  // First do Y
  // if the first one is DCT_DCT assume all the rest are as well
  TX_TYPE tx_type = get_tx_type_8x8(xd, &xd->block[0]);
#ifdef DEC_DEBUG
  if (dec_debug) {
    int i;
    printf("\n");
    printf("qcoeff 8x8\n");
    for (i = 0; i < 400; i++) {
      printf("%3d ", xd->qcoeff[i]);
      if (i % 16 == 15) printf("\n");
    }
  }
#endif
  if (tx_type != DCT_DCT || xd->mode_info_context->mbmi.mode == I8X8_PRED) {
    int i;
    assert(get_2nd_order_usage(xd) == 0);
    for (i = 0; i < 4; i++) {
      int ib = vp9_i8x8_block[i];
      int idx = (ib & 0x02) ? (ib + 2) : ib;
289 290 291 292
      int16_t *q  = xd->block[idx].qcoeff;
      int16_t *dq = xd->block[0].dequant;
      uint8_t *pre = xd->block[ib].predictor;
      uint8_t *dst = *(xd->block[ib].base_dst) + xd->block[ib].dst;
293 294 295 296 297 298 299 300
      int stride = xd->dst.y_stride;
      BLOCKD *b = &xd->block[ib];
      if (xd->mode_info_context->mbmi.mode == I8X8_PRED) {
        int i8x8mode = b->bmi.as_mode.first;
        vp9_intra8x8_predict(b, i8x8mode, b->predictor);
      }
      tx_type = get_tx_type_8x8(xd, &xd->block[ib]);
      if (tx_type != DCT_DCT) {
Scott LaVarnway's avatar
Scott LaVarnway committed
301 302
        vp9_ht_dequant_idct_add_8x8_c(tx_type, q, dq, pre, dst, 16, stride,
                                      xd->eobs[idx]);
303 304 305 306 307 308 309 310 311 312 313 314 315 316 317
      } else {
        vp9_dequant_idct_add_8x8_c(q, dq, pre, dst, 16, stride,
                                   0, xd->eobs[idx]);
      }
    }
  } else if (xd->mode_info_context->mbmi.mode == SPLITMV) {
    assert(get_2nd_order_usage(xd) == 0);
    vp9_dequant_idct_add_y_block_8x8(xd->qcoeff,
                                     xd->block[0].dequant,
                                     xd->predictor,
                                     xd->dst.y_buffer,
                                     xd->dst.y_stride,
                                     xd->eobs, xd);
  } else {
    BLOCKD *b = &xd->block[24];
Jim Bankoski's avatar
Jim Bankoski committed
318
    assert(get_2nd_order_usage(xd) == 1);
319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400
    vp9_dequantize_b_2x2(b);
    vp9_short_ihaar2x2(&b->dqcoeff[0], b->diff, 8);
    ((int *)b->qcoeff)[0] = 0;  // 2nd order block are set to 0 after idct
    ((int *)b->qcoeff)[1] = 0;
    ((int *)b->qcoeff)[2] = 0;
    ((int *)b->qcoeff)[3] = 0;
    ((int *)b->qcoeff)[4] = 0;
    ((int *)b->qcoeff)[5] = 0;
    ((int *)b->qcoeff)[6] = 0;
    ((int *)b->qcoeff)[7] = 0;
    vp9_dequant_dc_idct_add_y_block_8x8(xd->qcoeff,
                                        xd->block[0].dequant,
                                        xd->predictor,
                                        xd->dst.y_buffer,
                                        xd->dst.y_stride,
                                        xd->eobs,
                                        xd->block[24].diff,
                                        xd);
  }

  // Now do UV
  if (xd->mode_info_context->mbmi.mode == I8X8_PRED) {
    int i;
    for (i = 0; i < 4; i++) {
      int ib = vp9_i8x8_block[i];
      BLOCKD *b = &xd->block[ib];
      int i8x8mode = b->bmi.as_mode.first;
      b = &xd->block[16 + i];
      vp9_intra_uv4x4_predict(&xd->block[16 + i], i8x8mode, b->predictor);
      pbi->idct_add(b->qcoeff, b->dequant, b->predictor,
                    *(b->base_dst) + b->dst, 8, b->dst_stride);
      b = &xd->block[20 + i];
      vp9_intra_uv4x4_predict(&xd->block[20 + i], i8x8mode, b->predictor);
      pbi->idct_add(b->qcoeff, b->dequant, b->predictor,
                    *(b->base_dst) + b->dst, 8, b->dst_stride);
    }
  } else if (xd->mode_info_context->mbmi.mode == SPLITMV) {
    pbi->idct_add_uv_block(xd->qcoeff + 16 * 16, xd->block[16].dequant,
         xd->predictor + 16 * 16, xd->dst.u_buffer, xd->dst.v_buffer,
         xd->dst.uv_stride, xd->eobs + 16);
  } else {
    vp9_dequant_idct_add_uv_block_8x8
        (xd->qcoeff + 16 * 16, xd->block[16].dequant,
         xd->predictor + 16 * 16, xd->dst.u_buffer, xd->dst.v_buffer,
         xd->dst.uv_stride, xd->eobs + 16, xd);
  }
#ifdef DEC_DEBUG
  if (dec_debug) {
    int i;
    printf("\n");
    printf("predictor\n");
    for (i = 0; i < 384; i++) {
      printf("%3d ", xd->predictor[i]);
      if (i % 16 == 15) printf("\n");
    }
  }
#endif
}

static void decode_4x4(VP9D_COMP *pbi, MACROBLOCKD *xd,
                       BOOL_DECODER* const bc) {
  TX_TYPE tx_type;
  int i, eobtotal = 0;
  MB_PREDICTION_MODE mode = xd->mode_info_context->mbmi.mode;
  if (mode == I8X8_PRED) {
    assert(get_2nd_order_usage(xd) == 0);
    for (i = 0; i < 4; i++) {
      int ib = vp9_i8x8_block[i];
      const int iblock[4] = {0, 1, 4, 5};
      int j;
      int i8x8mode;
      BLOCKD *b;
      b = &xd->block[ib];
      i8x8mode = b->bmi.as_mode.first;
      vp9_intra8x8_predict(b, i8x8mode, b->predictor);
      for (j = 0; j < 4; j++) {
        b = &xd->block[ib + iblock[j]];
        tx_type = get_tx_type_4x4(xd, b);
        if (tx_type != DCT_DCT) {
          vp9_ht_dequant_idct_add_c(tx_type, b->qcoeff,
                                    b->dequant, b->predictor,
                                    *(b->base_dst) + b->dst, 16,
Scott LaVarnway's avatar
Scott LaVarnway committed
401
                                    b->dst_stride, b->eob);
402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428
        } else {
          vp9_dequant_idct_add(b->qcoeff, b->dequant, b->predictor,
                               *(b->base_dst) + b->dst, 16, b->dst_stride);
        }
      }
      b = &xd->block[16 + i];
      vp9_intra_uv4x4_predict(b, i8x8mode, b->predictor);
      pbi->idct_add(b->qcoeff, b->dequant, b->predictor,
                    *(b->base_dst) + b->dst, 8, b->dst_stride);
      b = &xd->block[20 + i];
      vp9_intra_uv4x4_predict(b, i8x8mode, b->predictor);
      pbi->idct_add(b->qcoeff, b->dequant, b->predictor,
                    *(b->base_dst) + b->dst, 8, b->dst_stride);
    }
  } else if (mode == B_PRED) {
    assert(get_2nd_order_usage(xd) == 0);
    for (i = 0; i < 16; i++) {
      int b_mode;
      BLOCKD *b = &xd->block[i];
      b_mode = xd->mode_info_context->bmi[i].as_mode.first;
#if CONFIG_NEWBINTRAMODES
      xd->mode_info_context->bmi[i].as_mode.context = b->bmi.as_mode.context =
          vp9_find_bpred_context(b);
#endif
      if (!xd->mode_info_context->mbmi.mb_skip_coeff)
        eobtotal += vp9_decode_coefs_4x4(pbi, xd, bc, PLANE_TYPE_Y_WITH_DC, i);

429
      vp9_intra4x4_predict(b, b_mode, b->predictor);
430 431 432 433
      tx_type = get_tx_type_4x4(xd, b);
      if (tx_type != DCT_DCT) {
        vp9_ht_dequant_idct_add_c(tx_type, b->qcoeff,
                                  b->dequant, b->predictor,
Scott LaVarnway's avatar
Scott LaVarnway committed
434 435
                                  *(b->base_dst) + b->dst, 16, b->dst_stride,
                                  b->eob);
436 437 438 439 440 441 442 443
      } else {
        vp9_dequant_idct_add(b->qcoeff, b->dequant, b->predictor,
                             *(b->base_dst) + b->dst, 16, b->dst_stride);
      }
    }
    if (!xd->mode_info_context->mbmi.mb_skip_coeff) {
      vp9_decode_mb_tokens_4x4_uv(pbi, xd, bc);
    }
Yaowu Xu's avatar
Yaowu Xu committed
444 445
    xd->above_context->y2 = 0;
    xd->left_context->y2 = 0;
446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496
    vp9_build_intra_predictors_mbuv(xd);
    pbi->idct_add_uv_block(xd->qcoeff + 16 * 16,
                           xd->block[16].dequant,
                           xd->predictor + 16 * 16,
                           xd->dst.u_buffer,
                           xd->dst.v_buffer,
                           xd->dst.uv_stride,
                           xd->eobs + 16);
  } else if (mode == SPLITMV) {
    assert(get_2nd_order_usage(xd) == 0);
    pbi->idct_add_y_block(xd->qcoeff,
                          xd->block[0].dequant,
                          xd->predictor,
                          xd->dst.y_buffer,
                          xd->dst.y_stride,
                          xd->eobs);
    pbi->idct_add_uv_block(xd->qcoeff + 16 * 16,
                           xd->block[16].dequant,
                           xd->predictor + 16 * 16,
                           xd->dst.u_buffer,
                           xd->dst.v_buffer,
                           xd->dst.uv_stride,
                           xd->eobs + 16);
  } else {
#ifdef DEC_DEBUG
    if (dec_debug) {
      int i;
      printf("\n");
      printf("qcoeff 4x4\n");
      for (i = 0; i < 400; i++) {
        printf("%3d ", xd->qcoeff[i]);
        if (i % 16 == 15) printf("\n");
      }
      printf("\n");
      printf("predictor\n");
      for (i = 0; i < 400; i++) {
        printf("%3d ", xd->predictor[i]);
        if (i % 16 == 15) printf("\n");
      }
    }
#endif
    tx_type = get_tx_type_4x4(xd, &xd->block[0]);
    if (tx_type != DCT_DCT) {
      assert(get_2nd_order_usage(xd) == 0);
      for (i = 0; i < 16; i++) {
        BLOCKD *b = &xd->block[i];
        tx_type = get_tx_type_4x4(xd, b);
        if (tx_type != DCT_DCT) {
          vp9_ht_dequant_idct_add_c(tx_type, b->qcoeff,
                                    b->dequant, b->predictor,
                                    *(b->base_dst) + b->dst, 16,
Scott LaVarnway's avatar
Scott LaVarnway committed
497
                                    b->dst_stride, b->eob);
498 499 500 501 502 503 504
        } else {
          vp9_dequant_idct_add(b->qcoeff, b->dequant, b->predictor,
                               *(b->base_dst) + b->dst, 16, b->dst_stride);
        }
      }
    } else {
      BLOCKD *b = &xd->block[24];
Jim Bankoski's avatar
Jim Bankoski committed
505
      assert(get_2nd_order_usage(xd) == 1);
506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539
      vp9_dequantize_b(b);
      if (xd->eobs[24] > 1) {
        vp9_short_inv_walsh4x4(&b->dqcoeff[0], b->diff);
        ((int *)b->qcoeff)[0] = 0;
        ((int *)b->qcoeff)[1] = 0;
        ((int *)b->qcoeff)[2] = 0;
        ((int *)b->qcoeff)[3] = 0;
        ((int *)b->qcoeff)[4] = 0;
        ((int *)b->qcoeff)[5] = 0;
        ((int *)b->qcoeff)[6] = 0;
        ((int *)b->qcoeff)[7] = 0;
      } else {
        xd->inv_walsh4x4_1(&b->dqcoeff[0], b->diff);
        ((int *)b->qcoeff)[0] = 0;
      }
      vp9_dequantize_b(b);
      pbi->dc_idct_add_y_block(xd->qcoeff,
                               xd->block[0].dequant,
                               xd->predictor,
                               xd->dst.y_buffer,
                               xd->dst.y_stride,
                               xd->eobs,
                               xd->block[24].diff);
    }
    pbi->idct_add_uv_block(xd->qcoeff + 16 * 16,
                           xd->block[16].dequant,
                           xd->predictor + 16 * 16,
                           xd->dst.u_buffer,
                           xd->dst.v_buffer,
                           xd->dst.uv_stride,
                           xd->eobs + 16);
  }
}

540
static void decode_16x16_sb(VP9D_COMP *pbi, MACROBLOCKD *xd,
Ronald S. Bultje's avatar
Ronald S. Bultje committed
541 542 543
                            BOOL_DECODER* const bc, int n,
                            int maska, int shiftb) {
  int x_idx = n & maska, y_idx = n >> shiftb;
544 545 546 547 548 549
  TX_TYPE tx_type = get_tx_type_16x16(xd, &xd->block[0]);
  if (tx_type != DCT_DCT) {
    vp9_ht_dequant_idct_add_16x16_c(
        tx_type, xd->qcoeff, xd->block[0].dequant,
        xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
        xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
Scott LaVarnway's avatar
Scott LaVarnway committed
550
        xd->dst.y_stride, xd->dst.y_stride, xd->block[0].eob);
551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566
  } else {
    vp9_dequant_idct_add_16x16(
        xd->qcoeff, xd->block[0].dequant,
        xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
        xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
        xd->dst.y_stride, xd->dst.y_stride, xd->eobs[0]);
  }
  vp9_dequant_idct_add_uv_block_8x8_inplace_c(
      xd->qcoeff + 16 * 16,
      xd->block[16].dequant,
      xd->dst.u_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
      xd->dst.v_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
      xd->dst.uv_stride, xd->eobs + 16, xd);
};

static void decode_8x8_sb(VP9D_COMP *pbi, MACROBLOCKD *xd,
Ronald S. Bultje's avatar
Ronald S. Bultje committed
567 568 569
                          BOOL_DECODER* const bc, int n,
                          int maska, int shiftb) {
  int x_idx = n & maska, y_idx = n >> shiftb;
570 571 572 573 574 575 576
  BLOCKD *b = &xd->block[24];
  TX_TYPE tx_type = get_tx_type_8x8(xd, &xd->block[0]);
  if (tx_type != DCT_DCT) {
    int i;
    for (i = 0; i < 4; i++) {
      int ib = vp9_i8x8_block[i];
      int idx = (ib & 0x02) ? (ib + 2) : ib;
577 578
      int16_t *q  = xd->block[idx].qcoeff;
      int16_t *dq = xd->block[0].dequant;
579 580 581 582 583 584 585 586 587 588
      int stride = xd->dst.y_stride;
      BLOCKD *b = &xd->block[ib];
      tx_type = get_tx_type_8x8(xd, &xd->block[ib]);
      if (tx_type != DCT_DCT) {
        vp9_ht_dequant_idct_add_8x8_c(
            tx_type, q, dq,
            xd->dst.y_buffer + (y_idx * 16 + (i / 2) * 8) * xd->dst.y_stride
            + x_idx * 16 + (i & 1) * 8,
            xd->dst.y_buffer + (y_idx * 16 + (i / 2) * 8) * xd->dst.y_stride
            + x_idx * 16 + (i & 1) * 8,
Scott LaVarnway's avatar
Scott LaVarnway committed
589
            stride, stride, b->eob);
590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628
      } else {
        vp9_dequant_idct_add_8x8_c(
            q, dq,
            xd->dst.y_buffer + (y_idx * 16 + (i / 2) * 8) * xd->dst.y_stride
            + x_idx * 16 + (i & 1) * 8,
            xd->dst.y_buffer + (y_idx * 16 + (i / 2) * 8) * xd->dst.y_stride
            + x_idx * 16 + (i & 1) * 8,
            stride, stride, 0, b->eob);
      }
      vp9_dequant_idct_add_uv_block_8x8_inplace_c(
          xd->qcoeff + 16 * 16, xd->block[16].dequant,
          xd->dst.u_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
          xd->dst.v_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
          xd->dst.uv_stride, xd->eobs + 16, xd);
    }
  } else {
    vp9_dequantize_b_2x2(b);
    vp9_short_ihaar2x2(&b->dqcoeff[0], b->diff, 8);
    ((int *)b->qcoeff)[0] = 0;  // 2nd order block are set to 0 after idct
    ((int *)b->qcoeff)[1] = 0;
    ((int *)b->qcoeff)[2] = 0;
    ((int *)b->qcoeff)[3] = 0;
    ((int *)b->qcoeff)[4] = 0;
    ((int *)b->qcoeff)[5] = 0;
    ((int *)b->qcoeff)[6] = 0;
    ((int *)b->qcoeff)[7] = 0;
    vp9_dequant_dc_idct_add_y_block_8x8_inplace_c(
        xd->qcoeff, xd->block[0].dequant,
        xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
        xd->dst.y_stride, xd->eobs, xd->block[24].diff, xd);
    vp9_dequant_idct_add_uv_block_8x8_inplace_c(
        xd->qcoeff + 16 * 16, xd->block[16].dequant,
        xd->dst.u_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
        xd->dst.v_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
        xd->dst.uv_stride, xd->eobs + 16, xd);
  }
};

static void decode_4x4_sb(VP9D_COMP *pbi, MACROBLOCKD *xd,
Ronald S. Bultje's avatar
Ronald S. Bultje committed
629 630 631
                          BOOL_DECODER* const bc, int n,
                          int maska, int shiftb) {
  int x_idx = n & maska, y_idx = n >> shiftb;
632 633 634 635 636 637 638 639 640 641 642 643 644 645
  BLOCKD *b = &xd->block[24];
  TX_TYPE tx_type = get_tx_type_4x4(xd, &xd->block[0]);
  if (tx_type != DCT_DCT) {
    int i;
    for (i = 0; i < 16; i++) {
      BLOCKD *b = &xd->block[i];
      tx_type = get_tx_type_4x4(xd, b);
      if (tx_type != DCT_DCT) {
        vp9_ht_dequant_idct_add_c(
            tx_type, b->qcoeff, b->dequant,
            xd->dst.y_buffer + (y_idx * 16 + (i / 4) * 4) * xd->dst.y_stride
            + x_idx * 16 + (i & 3) * 4,
            xd->dst.y_buffer + (y_idx * 16 + (i / 4) * 4) * xd->dst.y_stride
            + x_idx * 16 + (i & 3) * 4,
Scott LaVarnway's avatar
Scott LaVarnway committed
646
            xd->dst.y_stride, xd->dst.y_stride, b->eob);
647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684
      } else {
        vp9_dequant_idct_add_c(
            b->qcoeff, b->dequant,
            xd->dst.y_buffer + (y_idx * 16 + (i / 4) * 4) * xd->dst.y_stride
            + x_idx * 16 + (i & 3) * 4,
            xd->dst.y_buffer + (y_idx * 16 + (i / 4) * 4) * xd->dst.y_stride
            + x_idx * 16 + (i & 3) * 4,
            xd->dst.y_stride, xd->dst.y_stride);
      }
    }
  } else {
    vp9_dequantize_b(b);
    if (xd->eobs[24] > 1) {
      vp9_short_inv_walsh4x4(&b->dqcoeff[0], b->diff);
      ((int *)b->qcoeff)[0] = 0;
      ((int *)b->qcoeff)[1] = 0;
      ((int *)b->qcoeff)[2] = 0;
      ((int *)b->qcoeff)[3] = 0;
      ((int *)b->qcoeff)[4] = 0;
      ((int *)b->qcoeff)[5] = 0;
      ((int *)b->qcoeff)[6] = 0;
      ((int *)b->qcoeff)[7] = 0;
    } else {
      xd->inv_walsh4x4_1(&b->dqcoeff[0], b->diff);
      ((int *)b->qcoeff)[0] = 0;
    }
    vp9_dequant_dc_idct_add_y_block_4x4_inplace_c(
        xd->qcoeff, xd->block[0].dequant,
        xd->dst.y_buffer + y_idx * 16 * xd->dst.y_stride + x_idx * 16,
        xd->dst.y_stride, xd->eobs, xd->block[24].diff, xd);
  }
  vp9_dequant_idct_add_uv_block_4x4_inplace_c(
      xd->qcoeff + 16 * 16, xd->block[16].dequant,
      xd->dst.u_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
      xd->dst.v_buffer + y_idx * 8 * xd->dst.uv_stride + x_idx * 8,
      xd->dst.uv_stride, xd->eobs + 16, xd);
};

Ronald S. Bultje's avatar
Ronald S. Bultje committed
685 686 687
static void decode_superblock64(VP9D_COMP *pbi, MACROBLOCKD *xd,
                                int mb_row, unsigned int mb_col,
                                BOOL_DECODER* const bc) {
688 689 690 691
  int i, n, eobtotal;
  TX_SIZE tx_size = xd->mode_info_context->mbmi.txfm_size;
  VP9_COMMON *const pc = &pbi->common;
  MODE_INFO *orig_mi = xd->mode_info_context;
692
  const int mis = pc->mode_info_stride;
693

Ronald S. Bultje's avatar
Ronald S. Bultje committed
694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820
  assert(xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB64X64);

  if (pbi->common.frame_type != KEY_FRAME)
    vp9_setup_interp_filters(xd, xd->mode_info_context->mbmi.interp_filter, pc);

  // re-initialize macroblock dequantizer before detokenization
  if (xd->segmentation_enabled)
    mb_init_dequantizer(pbi, xd);

  if (xd->mode_info_context->mbmi.mb_skip_coeff) {
    int n;

    vp9_reset_mb_tokens_context(xd);
    for (n = 1; n <= 3; n++) {
      if (mb_col < pc->mb_cols - n)
        xd->above_context += n;
      if (mb_row < pc->mb_rows - n)
        xd->left_context += n;
      vp9_reset_mb_tokens_context(xd);
      if (mb_col < pc->mb_cols - n)
        xd->above_context -= n;
      if (mb_row < pc->mb_rows - n)
        xd->left_context -= n;
    }

    /* Special case:  Force the loopfilter to skip when eobtotal and
     * mb_skip_coeff are zero.
     */
    skip_recon_mb(pbi, xd);
    return;
  }

  /* do prediction */
  if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) {
    vp9_build_intra_predictors_sb64y_s(xd);
    vp9_build_intra_predictors_sb64uv_s(xd);
  } else {
    vp9_build_inter64x64_predictors_sb(xd, xd->dst.y_buffer,
                                       xd->dst.u_buffer, xd->dst.v_buffer,
                                       xd->dst.y_stride, xd->dst.uv_stride);
  }

  /* dequantization and idct */
  if (xd->mode_info_context->mbmi.txfm_size == TX_32X32) {
    for (n = 0; n < 4; n++) {
      const int x_idx = n & 1, y_idx = n >> 1;

      if (mb_col + x_idx * 2 >= pc->mb_cols ||
          mb_row + y_idx * 2 >= pc->mb_rows)
        continue;

      xd->left_context = pc->left_context + (y_idx << 1);
      xd->above_context = pc->above_context + mb_col + (x_idx << 1);
      xd->mode_info_context = orig_mi + x_idx * 2 + y_idx * 2 * mis;
      eobtotal = vp9_decode_sb_tokens(pbi, xd, bc);
      if (eobtotal == 0) {  // skip loopfilter
        xd->mode_info_context->mbmi.mb_skip_coeff = 1;
        if (mb_col + 1 < pc->mb_cols)
          xd->mode_info_context[1].mbmi.mb_skip_coeff = 1;
        if (mb_row + 1 < pc->mb_rows) {
          xd->mode_info_context[mis].mbmi.mb_skip_coeff = 1;
          if (mb_col + 1 < pc->mb_cols)
            xd->mode_info_context[mis + 1].mbmi.mb_skip_coeff = 1;
        }
      } else {
        vp9_dequant_idct_add_32x32(xd->sb_coeff_data.qcoeff, xd->block[0].dequant,
                                   xd->dst.y_buffer + x_idx * 32 +
                                       xd->dst.y_stride * y_idx * 32,
                                   xd->dst.y_buffer + x_idx * 32 +
                                       xd->dst.y_stride * y_idx * 32,
                                   xd->dst.y_stride, xd->dst.y_stride,
                                   xd->eobs[0]);
        vp9_dequant_idct_add_uv_block_16x16_c(xd->sb_coeff_data.qcoeff + 1024,
                                              xd->block[16].dequant,
                                              xd->dst.u_buffer + x_idx * 16 +
                                                xd->dst.uv_stride * y_idx * 16,
                                              xd->dst.v_buffer + x_idx * 16 +
                                                xd->dst.uv_stride * y_idx * 16,
                                              xd->dst.uv_stride, xd->eobs + 16);
      }
    }
  } else {
    for (n = 0; n < 16; n++) {
      int x_idx = n & 3, y_idx = n >> 2;

      if (mb_col + x_idx >= pc->mb_cols || mb_row + y_idx >= pc->mb_rows)
        continue;

      xd->above_context = pc->above_context + mb_col + x_idx;
      xd->left_context = pc->left_context + y_idx;
      xd->mode_info_context = orig_mi + x_idx + y_idx * mis;
      for (i = 0; i < 25; i++) {
        xd->block[i].eob = 0;
        xd->eobs[i] = 0;
      }

      eobtotal = vp9_decode_mb_tokens(pbi, xd, bc);
      if (eobtotal == 0) {  // skip loopfilter
        xd->mode_info_context->mbmi.mb_skip_coeff = 1;
        continue;
      }

      if (tx_size == TX_16X16) {
        decode_16x16_sb(pbi, xd, bc, n, 3, 2);
      } else if (tx_size == TX_8X8) {
        decode_8x8_sb(pbi, xd, bc, n, 3, 2);
      } else {
        decode_4x4_sb(pbi, xd, bc, n, 3, 2);
      }
    }
  }

  xd->above_context = pc->above_context + mb_col;
  xd->left_context = pc->left_context;
  xd->mode_info_context = orig_mi;
}

static void decode_superblock32(VP9D_COMP *pbi, MACROBLOCKD *xd,
                                int mb_row, unsigned int mb_col,
                                BOOL_DECODER* const bc) {
  int i, n, eobtotal;
  TX_SIZE tx_size = xd->mode_info_context->mbmi.txfm_size;
  VP9_COMMON *const pc = &pbi->common;
  MODE_INFO *orig_mi = xd->mode_info_context;
  const int mis = pc->mode_info_stride;

  assert(xd->mode_info_context->mbmi.sb_type == BLOCK_SIZE_SB32X32);
821

822 823 824
  if (pbi->common.frame_type != KEY_FRAME)
    vp9_setup_interp_filters(xd, xd->mode_info_context->mbmi.interp_filter, pc);

825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
  // re-initialize macroblock dequantizer before detokenization
  if (xd->segmentation_enabled)
    mb_init_dequantizer(pbi, xd);

  if (xd->mode_info_context->mbmi.mb_skip_coeff) {
    vp9_reset_mb_tokens_context(xd);
    if (mb_col < pc->mb_cols - 1)
      xd->above_context++;
    if (mb_row < pc->mb_rows - 1)
      xd->left_context++;
    vp9_reset_mb_tokens_context(xd);
    if (mb_col < pc->mb_cols - 1)
      xd->above_context--;
    if (mb_row < pc->mb_rows - 1)
      xd->left_context--;

    /* Special case:  Force the loopfilter to skip when eobtotal and
     * mb_skip_coeff are zero.
     */
    skip_recon_mb(pbi, xd);
    return;
  }

  /* do prediction */
  if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) {
    vp9_build_intra_predictors_sby_s(xd);
    vp9_build_intra_predictors_sbuv_s(xd);
  } else {
    vp9_build_inter32x32_predictors_sb(xd, xd->dst.y_buffer,
                                       xd->dst.u_buffer, xd->dst.v_buffer,
                                       xd->dst.y_stride, xd->dst.uv_stride);
  }

  /* dequantization and idct */
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879
  if (xd->mode_info_context->mbmi.txfm_size == TX_32X32) {
    eobtotal = vp9_decode_sb_tokens(pbi, xd, bc);
    if (eobtotal == 0) {  // skip loopfilter
      xd->mode_info_context->mbmi.mb_skip_coeff = 1;
      if (mb_col + 1 < pc->mb_cols)
        xd->mode_info_context[1].mbmi.mb_skip_coeff = 1;
      if (mb_row + 1 < pc->mb_rows) {
        xd->mode_info_context[mis].mbmi.mb_skip_coeff = 1;
        if (mb_col + 1 < pc->mb_cols)
          xd->mode_info_context[mis + 1].mbmi.mb_skip_coeff = 1;
      }
    } else {
      vp9_dequant_idct_add_32x32(xd->sb_coeff_data.qcoeff, xd->block[0].dequant,
                                 xd->dst.y_buffer, xd->dst.y_buffer,
                                 xd->dst.y_stride, xd->dst.y_stride,
                                 xd->eobs[0]);
      vp9_dequant_idct_add_uv_block_16x16_c(xd->sb_coeff_data.qcoeff + 1024,
                                            xd->block[16].dequant,
                                            xd->dst.u_buffer, xd->dst.v_buffer,
                                            xd->dst.uv_stride, xd->eobs + 16);
    }
Ronald S. Bultje's avatar
Ronald S. Bultje committed
880
  } else {
881 882
    for (n = 0; n < 4; n++) {
      int x_idx = n & 1, y_idx = n >> 1;
883

884 885
      if (mb_col + x_idx >= pc->mb_cols || mb_row + y_idx >= pc->mb_rows)
        continue;
886

887 888 889 890 891 892 893
      xd->above_context = pc->above_context + mb_col + x_idx;
      xd->left_context = pc->left_context + y_idx + (mb_row & 2);
      xd->mode_info_context = orig_mi + x_idx + y_idx * mis;
      for (i = 0; i < 25; i++) {
        xd->block[i].eob = 0;
        xd->eobs[i] = 0;
      }
894

895 896 897 898 899
      eobtotal = vp9_decode_mb_tokens(pbi, xd, bc);
      if (eobtotal == 0) {  // skip loopfilter
        xd->mode_info_context->mbmi.mb_skip_coeff = 1;
        continue;
      }
900

901 902 903 904 905 906 907
      if (tx_size == TX_16X16) {
        decode_16x16_sb(pbi, xd, bc, n, 1, 1);
      } else if (tx_size == TX_8X8) {
        decode_8x8_sb(pbi, xd, bc, n, 1, 1);
      } else {
        decode_4x4_sb(pbi, xd, bc, n, 1, 1);
      }
908 909
    }

910 911 912
    xd->above_context = pc->above_context + mb_col;
    xd->left_context = pc->left_context + (mb_row & 2);
    xd->mode_info_context = orig_mi;
913
  }
914 915
}

916
static void decode_macroblock(VP9D_COMP *pbi, MACROBLOCKD *xd,
Ronald S. Bultje's avatar
Ronald S. Bultje committed
917
                              int mb_row, unsigned int mb_col,
John Koleszar's avatar
John Koleszar committed
918
                              BOOL_DECODER* const bc) {
John Koleszar's avatar
John Koleszar committed
919 920 921
  int eobtotal = 0;
  MB_PREDICTION_MODE mode;
  int i;
Deb Mukherjee's avatar
Deb Mukherjee committed
922
  int tx_size;
923

Ronald S. Bultje's avatar
Ronald S. Bultje committed
924
  assert(!xd->mode_info_context->mbmi.sb_type);
John Koleszar's avatar
John Koleszar committed
925

Jingning Han's avatar
Jingning Han committed
926 927 928 929
  // re-initialize macroblock dequantizer before detokenization
  if (xd->segmentation_enabled)
    mb_init_dequantizer(pbi, xd);

Deb Mukherjee's avatar
Deb Mukherjee committed
930
  tx_size = xd->mode_info_context->mbmi.txfm_size;
Deb Mukherjee's avatar
Deb Mukherjee committed
931 932
  mode = xd->mode_info_context->mbmi.mode;

John Koleszar's avatar
John Koleszar committed
933
  if (xd->mode_info_context->mbmi.mb_skip_coeff) {
934
    vp9_reset_mb_tokens_context(xd);
935
  } else if (!bool_error(bc)) {
John Koleszar's avatar
John Koleszar committed
936 937 938
    for (i = 0; i < 25; i++) {
      xd->block[i].eob = 0;
      xd->eobs[i] = 0;
939
    }
940 941
    if (mode != B_PRED) {
      eobtotal = vp9_decode_mb_tokens(pbi, xd, bc);
Deb Mukherjee's avatar
Deb Mukherjee committed
942
    }
John Koleszar's avatar
John Koleszar committed
943
  }
944

Deb Mukherjee's avatar
Deb Mukherjee committed
945
  //mode = xd->mode_info_context->mbmi.mode;
946
  if (pbi->common.frame_type != KEY_FRAME)
947
    vp9_setup_interp_filters(xd, xd->mode_info_context->mbmi.interp_filter,
948
                             &pbi->common);
Gaute Strokkenes's avatar
Gaute Strokkenes committed
949

John Koleszar's avatar
John Koleszar committed
950 951
  if (eobtotal == 0 && mode != B_PRED && mode != SPLITMV
      && mode != I8X8_PRED
952
      && !bool_error(bc)) {
John Koleszar's avatar
John Koleszar committed
953 954 955 956
    /* Special case:  Force the loopfilter to skip when eobtotal and
     * mb_skip_coeff are zero.
     * */
    xd->mode_info_context->mbmi.mb_skip_coeff = 1;
957 958
    skip_recon_mb(pbi, xd);
    return;
John Koleszar's avatar
John Koleszar committed
959
  }
960 961 962 963
#ifdef DEC_DEBUG
  if (dec_debug)
    printf("Decoding mb:  %d %d\n", xd->mode_info_context->mbmi.mode, tx_size);
#endif
Yaowu Xu's avatar
Yaowu Xu committed
964

Jingning Han's avatar
Jingning Han committed
965 966 967
  // moved to be performed before detokenization
//  if (xd->segmentation_enabled)
//    mb_init_dequantizer(pbi, xd);
968

John Koleszar's avatar
John Koleszar committed
969 970 971
  /* do prediction */
  if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) {
    if (mode != I8X8_PRED) {
972
      vp9_build_intra_predictors_mbuv(xd);
John Koleszar's avatar
John Koleszar committed
973
      if (mode != B_PRED) {
974
        vp9_build_intra_predictors_mby(xd);
John Koleszar's avatar
John Koleszar committed
975
      }
John Koleszar's avatar
John Koleszar committed
976
    }
John Koleszar's avatar
John Koleszar committed
977
  } else {
978 979 980 981 982 983
#ifdef DEC_DEBUG
  if (dec_debug)
    printf("Decoding mb:  %d %d interp %d\n",
           xd->mode_info_context->mbmi.mode, tx_size,
           xd->mode_info_context->mbmi.interp_filter);
#endif
984
    vp9_build_inter_predictors_mb(xd);
John Koleszar's avatar
John Koleszar committed
985 986
  }

987 988 989 990 991 992 993 994 995 996 997 998
  if (tx_size == TX_16X16) {
    decode_16x16(pbi, xd, bc);
  } else if (tx_size == TX_8X8) {
    decode_8x8(pbi, xd, bc);
  } else {
    decode_4x4(pbi, xd, bc);
  }
#ifdef DEC_DEBUG
  if (dec_debug) {
    int i, j;
    printf("\n");
    printf("final y\n");
John Koleszar's avatar
John Koleszar committed
999
    for (i = 0; i < 16; i++) {
1000 1001 1002
      for (j = 0; j < 16; j++)
        printf("%3d ", xd->dst.y_buffer[i * xd->dst.y_stride + j]);
      printf("\n");
John Koleszar's avatar
John Koleszar committed
1003
    }
1004 1005 1006 1007 1008 1009
    printf("\n");
    printf("final u\n");
    for (i = 0; i < 8; i++) {
      for (j = 0; j < 8; j++)
        printf("%3d ", xd->dst.u_buffer[i * xd->dst.uv_stride + j]);
      printf("\n");
1010
    }
1011 1012 1013 1014 1015 1016
    printf("\n");
    printf("final v\n");
    for (i = 0; i < 8; i++) {
      for (j = 0; j < 8; j++)
        printf("%3d ", xd->dst.v_buffer[i * xd->dst.uv_stride + j]);
      printf("\n");
1017
    }
1018
    fflush(stdout);
John Koleszar's avatar
John Koleszar committed
1019
  }
1020
#endif
Yaowu Xu's avatar
Yaowu Xu committed
1021
}
John Koleszar's avatar
John Koleszar committed
1022

1023

1024
static int get_delta_q(vp9_reader *bc, int prev, int *q_update) {
John Koleszar's avatar
John Koleszar committed
1025
  int ret_val = 0;
John Koleszar's avatar
John Koleszar committed
1026

1027 1028
  if (vp9_read_bit(bc)) {
    ret_val = vp9_read_literal(bc, 4);
John Koleszar's avatar
John Koleszar committed
1029

1030
    if (vp9_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
1031 1032
      ret_val = -ret_val;
  }
John Koleszar's avatar
John Koleszar committed
1033

John Koleszar's avatar
John Koleszar committed
1034 1035 1036
  /* Trigger a quantizer update if the delta-q value has changed */
  if (ret_val != prev)
    *q_update = 1;
John Koleszar's avatar
John Koleszar committed
1037

John Koleszar's avatar
John Koleszar committed
1038
  return ret_val;
John Koleszar's avatar
John Koleszar committed
1039 1040 1041 1042 1043 1044 1045
}

#ifdef PACKET_TESTING
#include <stdio.h>
FILE *vpxlog = 0;
#endif

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
static void set_offsets(VP9D_COMP *pbi, int block_size,
                        int mb_row, int mb_col) {
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;
  const int mis = cm->mode_info_stride;
  const int idx = mis * mb_row + mb_col;
  const int dst_fb_idx = cm->new_fb_idx;
  const int recon_y_stride = cm->yv12_fb[dst_fb_idx].y_stride;
  const int recon_uv_stride = cm->yv12_fb[dst_fb_idx].uv_stride;
  const int recon_yoffset = mb_row * 16 * recon_y_stride + 16 * mb_col;
  const int recon_uvoffset = mb_row * 8 * recon_uv_stride + 8 * mb_col;

  xd->mode_info_context = cm->mi + idx;
  xd->mode_info_context->mbmi.sb_type = block_size >> 5;
  xd->prev_mode_info_context = cm->prev_mi + idx;
  xd->above_context = cm->above_context + mb_col;
  xd->left_context = cm->left_context + (mb_row & 3);
John Koleszar's avatar
John Koleszar committed
1063

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
  /* Distance of Mb to the various image edges.
   * These are specified to 8th pel as they are always compared to
   * values that are in 1/8th pel units
   */
  block_size >>= 4;  // in mb units
  xd->mb_to_top_edge = -((mb_row * 16)) << 3;
  xd->mb_to_left_edge = -((mb_col * 16) << 3);
  xd->mb_to_bottom_edge = ((cm->mb_rows - block_size - mb_row) * 16) << 3;
  xd->mb_to_right_edge = ((cm->mb_cols - block_size - mb_col) * 16) << 3;

  xd->up_available = (mb_row != 0);
  xd->left_available = (mb_col != 0);

  xd->dst.y_buffer = cm->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
  xd->dst.u_buffer = cm->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;
  xd->dst.v_buffer = cm->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset;
}
John Koleszar's avatar
John Koleszar committed
1081

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092
static void set_refs(VP9D_COMP *pbi, int block_size,
                     int mb_row, int mb_col) {
  VP9_COMMON *const cm = &pbi->common;
  MACROBLOCKD *const xd = &pbi->mb;
  MODE_INFO *mi = xd->mode_info_context;
  MB_MODE_INFO *const mbmi = &mi->mbmi;

  if (mbmi->ref_frame > INTRA_FRAME) {
    int ref_fb_idx, ref_yoffset, ref_uvoffset, ref_y_stride, ref_uv_stride;

    /* Select the appropriate reference frame for this MB */
1093
    ref_fb_idx = cm->active_ref_idx[mbmi->ref_frame - 1];
John Koleszar's avatar
John Koleszar committed
1094

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1095 1096 1097 1098 1099 1100 1101
    ref_y_stride = cm->yv12_fb[ref_fb_idx].y_stride;
    ref_yoffset = mb_row * 16 * ref_y_stride + 16 * mb_col;
    xd->pre.y_buffer = cm->yv12_fb[ref_fb_idx].y_buffer + ref_yoffset;
    ref_uv_stride = cm->yv12_fb[ref_fb_idx].uv_stride;
    ref_uvoffset = mb_row * 8 * ref_uv_stride + 8 * mb_col;
    xd->pre.u_buffer = cm->yv12_fb[ref_fb_idx].u_buffer + ref_uvoffset;
    xd->pre.v_buffer = cm->yv12_fb[ref_fb_idx].v_buffer + ref_uvoffset;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
1102

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1103 1104
    /* propagate errors from reference frames */
    xd->corrupted |= cm->yv12_fb[ref_fb_idx].corrupted;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
1105

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1106 1107
    if (mbmi->second_ref_frame > INTRA_FRAME) {
      int second_ref_fb_idx;
Yaowu Xu's avatar
Yaowu Xu committed
1108

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1109
      /* Select the appropriate reference frame for this MB */
1110
      second_ref_fb_idx = cm->active_ref_idx[mbmi->second_ref_frame - 1];
Ronald S. Bultje's avatar
Ronald S. Bultje committed
1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122

      xd->second_pre.y_buffer =
          cm->yv12_fb[second_ref_fb_idx].y_buffer + ref_yoffset;
      xd->second_pre.u_buffer =
          cm->yv12_fb[second_ref_fb_idx].u_buffer + ref_uvoffset;
      xd->second_pre.v_buffer =
          cm->yv12_fb[second_ref_fb_idx].v_buffer + ref_uvoffset;

      /* propagate errors from reference frames */
      xd->corrupted |= cm->yv12_fb[second_ref_fb_idx].corrupted;
    }
  }
John Koleszar's avatar
John Koleszar committed
1123

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1124 1125 1126 1127