vp9_decodframe.c 60.6 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"
13 14 15 16
#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
17
#include "vp9/common/vp9_entropy.h"
18
#include "vp9/decoder/vp9_decodframe.h"
19
#include "vp9/decoder/vp9_detokenize.h"
20 21 22 23
#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
24
#include "vpx_scale/vpx_scale.h"
25
#include "vp9/common/vp9_setupintrarecon.h"
Scott LaVarnway's avatar
Scott LaVarnway committed
26

27
#include "vp9/decoder/vp9_decodemv.h"
28 29
#include "vp9/common/vp9_extend.h"
#include "vp9/common/vp9_modecont.h"
John Koleszar's avatar
John Koleszar committed
30
#include "vpx_mem/vpx_mem.h"
31
#include "vp9/decoder/vp9_dboolhuff.h"
John Koleszar's avatar
John Koleszar committed
32

33 34
#include "vp9/common/vp9_seg_common.h"
#include "vp9/common/vp9_entropy.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

42 43 44 45 46
// #define DEC_DEBUG
#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
#if CONFIG_SUPERBLOCKS
    if (xd->mode_info_context->mbmi.encoded_as_sb) {
176 177
      vp9_build_intra_predictors_sbuv_s(xd);
      vp9_build_intra_predictors_sby_s(xd);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
178 179
    } else {
#endif
180 181
    vp9_build_intra_predictors_mbuv_s(xd);
    vp9_build_intra_predictors_mby_s(xd);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
182 183 184
#if CONFIG_SUPERBLOCKS
    }
#endif
John Koleszar's avatar
John Koleszar committed
185
  } else {
Ronald S. Bultje's avatar
Ronald S. Bultje committed
186 187
#if CONFIG_SUPERBLOCKS
    if (xd->mode_info_context->mbmi.encoded_as_sb) {
188 189 190 191 192 193
      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);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
194 195
    } else {
#endif
196 197 198 199 200 201 202 203 204 205 206 207 208 209
    vp9_build_1st_inter16x16_predictors_mb(xd,
                                           xd->dst.y_buffer,
                                           xd->dst.u_buffer,
                                           xd->dst.v_buffer,
                                           xd->dst.y_stride,
                                           xd->dst.uv_stride);

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

227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285
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,
                                    xd->dst.y_buffer, 16, xd->dst.y_stride);
  } 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;
286 287 288 289
      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;
290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313
      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) {
        vp9_ht_dequant_idct_add_8x8_c(tx_type, q, dq, pre, dst, 16, stride);
      } 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
314
    assert(get_2nd_order_usage(xd) == 1);
315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450
    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,
                                    b->dst_stride);
        } 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;
#if CONFIG_COMP_INTRA_PRED
      int b_mode2;
#endif
      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);
#if CONFIG_COMP_INTRA_PRED
      b_mode2 = xd->mode_info_context->bmi[i].as_mode.second;

      if (b_mode2 == (B_PREDICTION_MODE)(B_DC_PRED - 1)) {
#endif
        vp9_intra4x4_predict(b, b_mode, b->predictor);
#if CONFIG_COMP_INTRA_PRED
      } else {
        vp9_comp_intra4x4_predict(b, b_mode, b_mode2, b->predictor);
      }
#endif
      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, b->dst_stride);
      } 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
451 452
    xd->above_context->y2 = 0;
    xd->left_context->y2 = 0;
453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511
    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,
                                    b->dst_stride);
        } 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
512
      assert(get_2nd_order_usage(xd) == 1);
513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546
      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);
  }
}

547
#if CONFIG_SUPERBLOCKS
548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582
static void decode_16x16_sb(VP9D_COMP *pbi, MACROBLOCKD *xd,
                            BOOL_DECODER* const bc, int n) {
  int x_idx = n & 1, y_idx = n >> 1;
  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,
        xd->dst.y_stride, xd->dst.y_stride);
  } 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,
                          BOOL_DECODER* const bc, int n) {
  BLOCKD *b = &xd->block[24];
  int x_idx = n & 1, y_idx = n >> 1;
  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;
583 584
      int16_t *q  = xd->block[idx].qcoeff;
      int16_t *dq = xd->block[0].dequant;
585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689
      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,
            stride, stride);
      } 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,
                          BOOL_DECODER* const bc, int n) {
  BLOCKD *b = &xd->block[24];
  int x_idx = n & 1, y_idx = n >> 1;
  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,
            xd->dst.y_stride, xd->dst.y_stride);
      } 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);
};

690 691 692 693 694 695 696
static void decode_superblock(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;
697
  const int mis = pc->mode_info_stride;
698 699 700

  assert(xd->mode_info_context->mbmi.encoded_as_sb);

701 702 703
  if (pbi->common.frame_type != KEY_FRAME)
    vp9_setup_interp_filters(xd, xd->mode_info_context->mbmi.interp_filter, pc);

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
  // 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 */
738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761
#if CONFIG_TX32X32
  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);
    }
  } else {
#endif
762 763 764 765 766 767
  for (n = 0; n < 4; n++) {
    int x_idx = n & 1, y_idx = n >> 1;

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

768

769 770
    xd->above_context = pc->above_context + mb_col + x_idx;
    xd->left_context = pc->left_context + y_idx;
771
    xd->mode_info_context = orig_mi + x_idx + y_idx * mis;
772 773 774 775 776
    for (i = 0; i < 25; i++) {
      xd->block[i].eob = 0;
      xd->eobs[i] = 0;
    }

777
    eobtotal = vp9_decode_mb_tokens(pbi, xd, bc);
778 779 780 781 782 783
    if (eobtotal == 0) {  // skip loopfilter
      xd->mode_info_context->mbmi.mb_skip_coeff = 1;
      continue;
    }

    if (tx_size == TX_16X16) {
784
      decode_16x16_sb(pbi, xd, bc, n);
785
    } else if (tx_size == TX_8X8) {
786
      decode_8x8_sb(pbi, xd, bc, n);
787
    } else {
788
      decode_4x4_sb(pbi, xd, bc, n);
789 790 791 792 793 794
    }
  }

  xd->above_context = pc->above_context + mb_col;
  xd->left_context = pc->left_context;
  xd->mode_info_context = orig_mi;
795 796 797
#if CONFIG_TX32X32
  }
#endif
798 799 800
}
#endif

801
static void decode_macroblock(VP9D_COMP *pbi, MACROBLOCKD *xd,
Ronald S. Bultje's avatar
Ronald S. Bultje committed
802
                              int mb_row, unsigned int mb_col,
John Koleszar's avatar
John Koleszar committed
803
                              BOOL_DECODER* const bc) {
John Koleszar's avatar
John Koleszar committed
804 805 806
  int eobtotal = 0;
  MB_PREDICTION_MODE mode;
  int i;
Deb Mukherjee's avatar
Deb Mukherjee committed
807
  int tx_size;
808

809
#if CONFIG_SUPERBLOCKS
810
  assert(!xd->mode_info_context->mbmi.encoded_as_sb);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
811
#endif
John Koleszar's avatar
John Koleszar committed
812

Jingning Han's avatar
Jingning Han committed
813 814 815 816
  // re-initialize macroblock dequantizer before detokenization
  if (xd->segmentation_enabled)
    mb_init_dequantizer(pbi, xd);

Deb Mukherjee's avatar
Deb Mukherjee committed
817
  tx_size = xd->mode_info_context->mbmi.txfm_size;
Deb Mukherjee's avatar
Deb Mukherjee committed
818 819
  mode = xd->mode_info_context->mbmi.mode;

John Koleszar's avatar
John Koleszar committed
820
  if (xd->mode_info_context->mbmi.mb_skip_coeff) {
821
    vp9_reset_mb_tokens_context(xd);
822
  } else if (!bool_error(bc)) {
John Koleszar's avatar
John Koleszar committed
823 824 825
    for (i = 0; i < 25; i++) {
      xd->block[i].eob = 0;
      xd->eobs[i] = 0;
826
    }
827 828
    if (mode != B_PRED) {
      eobtotal = vp9_decode_mb_tokens(pbi, xd, bc);
Deb Mukherjee's avatar
Deb Mukherjee committed
829
    }
John Koleszar's avatar
John Koleszar committed
830
  }
831

Deb Mukherjee's avatar
Deb Mukherjee committed
832
  //mode = xd->mode_info_context->mbmi.mode;
833
  if (pbi->common.frame_type != KEY_FRAME)
834
    vp9_setup_interp_filters(xd, xd->mode_info_context->mbmi.interp_filter,
835
                             &pbi->common);
Gaute Strokkenes's avatar
Gaute Strokkenes committed
836

John Koleszar's avatar
John Koleszar committed
837 838
  if (eobtotal == 0 && mode != B_PRED && mode != SPLITMV
      && mode != I8X8_PRED
839
      && !bool_error(bc)) {
John Koleszar's avatar
John Koleszar committed
840 841 842 843
    /* Special case:  Force the loopfilter to skip when eobtotal and
     * mb_skip_coeff are zero.
     * */
    xd->mode_info_context->mbmi.mb_skip_coeff = 1;
844 845
    skip_recon_mb(pbi, xd);
    return;
John Koleszar's avatar
John Koleszar committed
846
  }
847 848 849 850
#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
851

Jingning Han's avatar
Jingning Han committed
852 853 854
  // moved to be performed before detokenization
//  if (xd->segmentation_enabled)
//    mb_init_dequantizer(pbi, xd);
855

John Koleszar's avatar
John Koleszar committed
856 857 858
  /* do prediction */
  if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) {
    if (mode != I8X8_PRED) {
859
      vp9_build_intra_predictors_mbuv(xd);
John Koleszar's avatar
John Koleszar committed
860
      if (mode != B_PRED) {
861
        vp9_build_intra_predictors_mby(xd);
John Koleszar's avatar
John Koleszar committed
862
      }
John Koleszar's avatar
John Koleszar committed
863
    }
John Koleszar's avatar
John Koleszar committed
864
  } else {
865 866 867 868 869 870
#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
871
    vp9_build_inter_predictors_mb(xd);
John Koleszar's avatar
John Koleszar committed
872 873
  }

874 875 876 877 878 879 880 881 882 883 884 885
  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
886
    for (i = 0; i < 16; i++) {
887 888 889
      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
890
    }
891 892 893 894 895 896
    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");
897
    }
898 899 900 901 902 903
    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");
904
    }
905
    fflush(stdout);
John Koleszar's avatar
John Koleszar committed
906
  }
907
#endif
Yaowu Xu's avatar
Yaowu Xu committed
908
}
John Koleszar's avatar
John Koleszar committed
909

910

911
static int get_delta_q(vp9_reader *bc, int prev, int *q_update) {
John Koleszar's avatar
John Koleszar committed
912
  int ret_val = 0;
John Koleszar's avatar
John Koleszar committed
913

914 915
  if (vp9_read_bit(bc)) {
    ret_val = vp9_read_literal(bc, 4);
John Koleszar's avatar
John Koleszar committed
916

917
    if (vp9_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
918 919
      ret_val = -ret_val;
  }
John Koleszar's avatar
John Koleszar committed
920

John Koleszar's avatar
John Koleszar committed
921 922 923
  /* 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
924

John Koleszar's avatar
John Koleszar committed
925
  return ret_val;
John Koleszar's avatar
John Koleszar committed
926 927 928 929 930 931 932
}

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

Adrian Grange's avatar
Adrian Grange committed
933
/* Decode a row of Superblocks (2x2 region of MBs) */
934
static void
935
decode_sb_row(VP9D_COMP *pbi, VP9_COMMON *pc, int mbrow, MACROBLOCKD *xd,
John Koleszar's avatar
John Koleszar committed
936
              BOOL_DECODER* const bc) {
John Koleszar's avatar
John Koleszar committed
937 938 939 940 941 942 943 944 945 946 947 948 949
  int i;
  int sb_col;
  int mb_row, mb_col;
  int recon_yoffset, recon_uvoffset;
  int ref_fb_idx = pc->lst_fb_idx;
  int dst_fb_idx = pc->new_fb_idx;
  int recon_y_stride = pc->yv12_fb[ref_fb_idx].y_stride;
  int recon_uv_stride = pc->yv12_fb[ref_fb_idx].uv_stride;
  int row_delta[4] = { 0, +1,  0, -1};
  int col_delta[4] = { +1, -1, +1, +1};
  int sb_cols = (pc->mb_cols + 1) >> 1;

  // For a SB there are 2 left contexts, each pertaining to a MB row within
Ronald S. Bultje's avatar
Ronald S. Bultje committed
950
  vpx_memset(pc->left_context, 0, sizeof(pc->left_context));
John Koleszar's avatar
John Koleszar committed
951 952 953 954 955

  mb_row = mbrow;
  mb_col = 0;

  for (sb_col = 0; sb_col < sb_cols; sb_col++) {
Ronald S. Bultje's avatar
Ronald S. Bultje committed
956 957 958
    MODE_INFO *mi = xd->mode_info_context;

#if CONFIG_SUPERBLOCKS
959
    mi->mbmi.encoded_as_sb = vp9_read(bc, pc->sb_coded);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
960 961
#endif

John Koleszar's avatar
John Koleszar committed
962 963 964 965 966 967 968
    // Process the 4 MBs within the SB in the order:
    // top-left, top-right, bottom-left, bottom-right
    for (i = 0; i < 4; i++) {
      int dy = row_delta[i];
      int dx = col_delta[i];
      int offset_extended = dy * xd->mode_info_stride + dx;

969 970
      xd->mb_index = i;

Ronald S. Bultje's avatar
Ronald S. Bultje committed
971
      mi = xd->mode_info_context;
John Koleszar's avatar
John Koleszar committed
972 973 974 975 976
      if ((mb_row >= pc->mb_rows) || (mb_col >= pc->mb_cols)) {
        // MB lies outside frame, skip on to next
        mb_row += dy;
        mb_col += dx;
        xd->mode_info_context += offset_extended;
977
        xd->prev_mode_info_context += offset_extended;
John Koleszar's avatar
John Koleszar committed
978 979
        continue;
      }
980 981 982 983
#if CONFIG_SUPERBLOCKS
      if (i)
        mi->mbmi.encoded_as_sb = 0;
#endif
Yaowu Xu's avatar
Yaowu Xu committed
984

John Koleszar's avatar
John Koleszar committed
985 986
      // Set above context pointer
      xd->above_context = pc->above_context + mb_col;
Ronald S. Bultje's avatar
Ronald S. Bultje committed
987
      xd->left_context = pc->left_context + (i >> 1);
John Koleszar's avatar
John Koleszar committed
988 989 990 991 992 993 994

      /* 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
       */
      xd->mb_to_top_edge = -((mb_row * 16)) << 3;
      xd->mb_to_left_edge = -((mb_col * 16) << 3);
995 996 997 998 999 1000 1001 1002 1003 1004 1005
#if CONFIG_SUPERBLOCKS
      if (mi->mbmi.encoded_as_sb) {
        xd->mb_to_bottom_edge = ((pc->mb_rows - 2 - mb_row) * 16) << 3;
        xd->mb_to_right_edge = ((pc->mb_cols - 2 - mb_col) * 16) << 3;
      } else {
#endif
        xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
        xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
#if CONFIG_SUPERBLOCKS
      }
#endif
1006
#ifdef DEC_DEBUG
1007 1008
      dec_debug = (pbi->common.current_video_frame == 46 &&
                   mb_row == 5 && mb_col == 2);
1009 1010 1011 1012 1013 1014 1015 1016
      if (dec_debug)
#if CONFIG_SUPERBLOCKS
        printf("Enter Debug %d %d sb %d\n", mb_row, mb_col,
               mi->mbmi.encoded_as_sb);
#else
        printf("Enter Debug %d %d\n", mb_row, mb_col);
#endif
#endif
John Koleszar's avatar
John Koleszar committed
1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027
      xd->up_available = (mb_row != 0);
      xd->left_available = (mb_col != 0);


      recon_yoffset = (mb_row * recon_y_stride * 16) + (mb_col * 16);
      recon_uvoffset = (mb_row * recon_uv_stride * 8) + (mb_col * 8);

      xd->dst.y_buffer = pc->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
      xd->dst.u_buffer = pc->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;
      xd->dst.v_buffer = pc->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset;

1028
      vp9_decode_mb_mode_mv(pbi, xd, mb_row, mb_col, bc);
1029 1030

      update_blockd_bmi(xd);
1031 1032 1033 1034
#ifdef DEC_DEBUG
      if (dec_debug)
        printf("Hello\n");
#endif
1035

John Koleszar's avatar
John Koleszar committed
1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047
      /* Select the appropriate reference frame for this MB */
      if (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME)
        ref_fb_idx = pc->lst_fb_idx;
      else if (xd->mode_info_context->mbmi.ref_frame == GOLDEN_FRAME)
        ref_fb_idx = pc->gld_fb_idx;
      else
        ref_fb_idx = pc->alt_fb_idx;

      xd->pre.y_buffer = pc->yv12_fb[ref_fb_idx].y_buffer + recon_yoffset;
      xd->pre.u_buffer = pc->yv12_fb[ref_fb_idx].u_buffer + recon_uvoffset;
      xd->pre.v_buffer = pc->yv12_fb[ref_fb_idx].v_buffer + recon_uvoffset;

1048
      if (xd->mode_info_context->mbmi.second_ref_frame > 0) {
John Koleszar's avatar
John Koleszar committed
1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072
        int second_ref_fb_idx;

        /* Select the appropriate reference frame for this MB */
        if (xd->mode_info_context->mbmi.second_ref_frame == LAST_FRAME)
          second_ref_fb_idx = pc->lst_fb_idx;
        else if (xd->mode_info_context->mbmi.second_ref_frame ==
                 GOLDEN_FRAME)
          second_ref_fb_idx = pc->gld_fb_idx;
        else
          second_ref_fb_idx = pc->alt_fb_idx;

        xd->second_pre.y_buffer =
          pc->yv12_fb[second_ref_fb_idx].y_buffer + recon_yoffset;
        xd->second_pre.u_buffer =
          pc->yv12_fb[second_ref_fb_idx].u_buffer + recon_uvoffset;
        xd->second_pre.v_buffer =
          pc->yv12_fb[second_ref_fb_idx].v_buffer + recon_uvoffset;
      }

      if (xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME) {
        /* propagate errors from reference frames */
        xd->corrupted |= pc->yv12_fb[ref_fb_idx].corrupted;
      }

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1073 1074
#if CONFIG_SUPERBLOCKS
      if (xd->mode_info_context->mbmi.encoded_as_sb) {
Ronald S. Bultje's avatar
Ronald S. Bultje committed
1075 1076 1077 1078 1079 1080 1081
        if (mb_col < pc->mb_cols - 1)
          mi[1] = mi[0];
        if (mb_row < pc->mb_rows - 1) {
          mi[pc->mode_info_stride] = mi[0];
          if (mb_col < pc->mb_cols - 1)
            mi[pc->mode_info_stride + 1] = mi[0];
        }
Ronald S. Bultje's avatar
Ronald S. Bultje committed
1082
      }
1083 1084 1085 1086 1087 1088 1089 1090
      if (xd->mode_info_context->mbmi.encoded_as_sb) {
        decode_superblock(pbi, xd, mb_row, mb_col, bc);
      } else {
#endif
        vp9_intra_prediction_down_copy(xd);
        decode_macroblock(pbi, xd, mb_row, mb_col, bc);
#if CONFIG_SUPERBLOCKS
      }
Ronald S. Bultje's avatar
Ronald S. Bultje committed
1091
#endif
John Koleszar's avatar
John Koleszar committed
1092 1093

      /* check if the boolean decoder has suffered an error */
1094
      xd->corrupted |= bool_error(bc);
John Koleszar's avatar
John Koleszar committed
1095

Ronald S. Bultje's avatar
Ronald S. Bultje committed
1096 1097 1098 1099 1100 1101 1102 1103 1104
#if CONFIG_SUPERBLOCKS
      if (mi->mbmi.encoded_as_sb) {
        assert(!i);
        mb_col += 2;
        xd->mode_info_context += 2;
        xd->prev_mode_info_context += 2;
        break;
      }
#endif
John Koleszar's avatar
John Koleszar committed
1105 1106 1107

      // skip to next MB
      xd->mode_info_context += offset_extended;
1108
      xd->prev_mode_info_context += offset_extended;
John Koleszar's avatar
John Koleszar committed
1109 1110
      mb_row += dy;
      mb_col += dx;
John Koleszar's avatar
John Koleszar committed
1111
    }
John Koleszar's avatar
John Koleszar committed
1112
  }
John Koleszar's avatar
John Koleszar committed
1113

John Koleszar's avatar
John Koleszar committed
1114 1115
  /* skip prediction column */
  xd->mode_info_context += 1 - (pc->mb_cols & 0x1) + xd->mode_info_stride;
1116
  xd->prev_mode_info_context += 1 - (pc->mb_cols & 0x1) + xd->mode_info_stride;
John Koleszar's avatar
John Koleszar committed
1117 1118
}

John Koleszar's avatar
John Koleszar committed
1119 1120 1121 1122
static unsigned int read_partition_size(const unsigned char *cx_size) {
  const unsigned int size =
    cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16);
  return size;
John Koleszar's avatar
John Koleszar committed
1123 1124
}

1125 1126
static int read_is_valid(const unsigned char *start,
                         size_t               len,
John Koleszar's avatar
John Koleszar committed
1127 1128
                         const unsigned char *end) {
  return (start + len > start && start + len <= end);
1129 1130 1131
}


1132
static void setup_token_decoder(VP9D_COMP *pbi,
John Koleszar's avatar
John Koleszar committed
1133 1134
                                const unsigned char *cx_data,
                                BOOL_DECODER* const bool_decoder) {
1135
  VP9_COMMON          *pc = &pbi->common;
John Koleszar's avatar
John Koleszar committed
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156
  const unsigned char *user_data_end = pbi->Source + pbi->source_sz;
  const unsigned char *partition;

  ptrdiff_t            partition_size;
  ptrdiff_t            bytes_left;

  // Set up pointers to token partition
  partition = cx_data;
  bytes_left = user_data_end - partition;
  partition_size = bytes_left;

  /* Validate the calculated partition length. If the buffer
   * described by the partition can't be fully read, then restrict
   * it to the portion that can be (for EC mode) or throw an error.
   */
  if (!read_is_valid(partition, partition_size, user_data_end)) {
    vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
                       "Truncated packet or corrupt partition "
                       "%d length", 1);
  }

1157 1158
  if (vp9_start_decode(bool_decoder,
                       partition, (unsigned int)partition_size))
John Koleszar's avatar
John Koleszar committed
1159 1160
    vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
                       "Failed to allocate bool decoder %d", 1);
John Koleszar's avatar
John Koleszar committed
1161 1162
}

1163 1164
static void init_frame(VP9D_COMP *pbi) {
  VP9_COMMON *const pc = &pbi->common;
John Koleszar's avatar
John Koleszar committed
1165
  MACROBLOCKD *const xd  = &pbi->mb;
John Koleszar's avatar
John Koleszar committed
1166

John Koleszar's avatar
John Koleszar committed
1167 1168
  if (pc->frame_type == KEY_FRAME) {
    /* Various keyframe initializations */
1169
    vp9_init_mv_probs(pc);
John Koleszar's avatar
John Koleszar committed
1170

1171 1172
    vp9_init_mbmode_probs(pc);
    vp9_default_bmode_probs(pc->fc.bmode_prob);
John Koleszar's avatar
John Koleszar committed
1173

1174 1175
    vp9_default_coef_probs(pc);
    vp9_kf_default_bmode_probs(pc->kf_bmode_prob);
John Koleszar's avatar
John Koleszar committed
1176

John Koleszar's avatar
John Koleszar committed
1177 1178
    // Reset the segment feature data to the default stats:
    // Features disabled, 0, with delta coding (Default state).