IntraSearch.cpp 67 KB
Newer Older
1
2
3
4
5
/* The copyright in this software is being made available under the BSD
 * License, included below. This software may be subject to other third party
 * and contributor rights, including patent rights, and no such rights are
 * granted under this license.
 *
6
 * Copyright (c) 2010-2019, ITU/ISO/IEC
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

/** \file     EncSearch.cpp
 *  \brief    encoder intra search class
 */

#include "IntraSearch.h"

#include "EncModeCtrl.h"

#include "CommonLib/CommonDef.h"
#include "CommonLib/Rom.h"
#include "CommonLib/Picture.h"
#include "CommonLib/UnitTools.h"

#include "CommonLib/dtrace_next.h"
#include "CommonLib/dtrace_buffer.h"

#include <math.h>
#include <limits>

 //! \ingroup EncoderLib
 //! \{

IntraSearch::IntraSearch()
  : m_pSplitCS      (nullptr)
  , m_pFullCS       (nullptr)
  , m_pBestCS       (nullptr)
  , m_pcEncCfg      (nullptr)
  , m_pcTrQuant     (nullptr)
  , m_pcRdCost      (nullptr)
  , m_CABACEstimator(nullptr)
  , m_CtxCache      (nullptr)
  , m_isInitialized (false)
{
  for( uint32_t ch = 0; ch < MAX_NUM_TBLOCKS; ch++ )
  {
    m_pSharedPredTransformSkip[ch] = nullptr;
  }
}


void IntraSearch::destroy()
{
  CHECK( !m_isInitialized, "Not initialized" );

  if( m_pcEncCfg )
  {
Karsten Suehring's avatar
Karsten Suehring committed
80
81
    const uint32_t uiNumLayersToAllocateSplit = 1;
    const uint32_t uiNumLayersToAllocateFull  = 1;
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
    const int uiNumSaveLayersToAllocate = 2;

    for( uint32_t layer = 0; layer < uiNumSaveLayersToAllocate; layer++ )
    {
      m_pSaveCS[layer]->destroy();
      delete m_pSaveCS[layer];
    }

    uint32_t numWidths  = gp_sizeIdxInfo->numWidths();
    uint32_t numHeights = gp_sizeIdxInfo->numHeights();

    for( uint32_t width = 0; width < numWidths; width++ )
    {
      for( uint32_t height = 0; height < numHeights; height++ )
      {
Karsten Suehring's avatar
Karsten Suehring committed
97
        if( gp_sizeIdxInfo->isCuSize( gp_sizeIdxInfo->sizeFrom( width ) ) && gp_sizeIdxInfo->isCuSize( gp_sizeIdxInfo->sizeFrom( height ) ) )
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
        {
          for( uint32_t layer = 0; layer < uiNumLayersToAllocateSplit; layer++ )
          {
            m_pSplitCS[width][height][layer]->destroy();

            delete m_pSplitCS[width][height][layer];
          }

          for( uint32_t layer = 0; layer < uiNumLayersToAllocateFull; layer++ )
          {
            m_pFullCS[width][height][layer]->destroy();

            delete m_pFullCS[width][height][layer];
          }

          delete[] m_pSplitCS[width][height];
          delete[] m_pFullCS [width][height];

          m_pBestCS[width][height]->destroy();
          m_pTempCS[width][height]->destroy();

          delete m_pTempCS[width][height];
          delete m_pBestCS[width][height];
        }
      }

      delete[] m_pSplitCS[width];
      delete[] m_pFullCS [width];

      delete[] m_pTempCS[width];
      delete[] m_pBestCS[width];
    }

    delete[] m_pSplitCS;
    delete[] m_pFullCS;

    delete[] m_pBestCS;
    delete[] m_pTempCS;

    delete[] m_pSaveCS;
  }

  m_pSplitCS = m_pFullCS = nullptr;

  m_pBestCS = m_pTempCS = nullptr;

  m_pSaveCS = nullptr;

  for( uint32_t ch = 0; ch < MAX_NUM_TBLOCKS; ch++ )
  {
    delete[] m_pSharedPredTransformSkip[ch];
    m_pSharedPredTransformSkip[ch] = nullptr;
  }

  m_isInitialized = false;
}

IntraSearch::~IntraSearch()
{
  if( m_isInitialized )
  {
    destroy();
  }
}

void IntraSearch::init( EncCfg*        pcEncCfg,
                        TrQuant*       pcTrQuant,
                        RdCost*        pcRdCost,
                        CABACWriter*   CABACEstimator,
                        CtxCache*      ctxCache,
                        const uint32_t     maxCUWidth,
                        const uint32_t     maxCUHeight,
                        const uint32_t     maxTotalCUDepth
)
{
  CHECK(m_isInitialized, "Already initialized");
  m_pcEncCfg                     = pcEncCfg;
  m_pcTrQuant                    = pcTrQuant;
  m_pcRdCost                     = pcRdCost;
  m_CABACEstimator               = CABACEstimator;
  m_CtxCache                     = ctxCache;

  const ChromaFormat cform = pcEncCfg->getChromaFormatIdc();

  IntraPrediction::init( cform, pcEncCfg->getBitDepth( CHANNEL_TYPE_LUMA ) );

  for( uint32_t ch = 0; ch < MAX_NUM_TBLOCKS; ch++ )
  {
    m_pSharedPredTransformSkip[ch] = new Pel[MAX_CU_SIZE * MAX_CU_SIZE];
  }

  uint32_t numWidths  = gp_sizeIdxInfo->numWidths();
  uint32_t numHeights = gp_sizeIdxInfo->numHeights();

Karsten Suehring's avatar
Karsten Suehring committed
192
193
  const uint32_t uiNumLayersToAllocateSplit = 1;
  const uint32_t uiNumLayersToAllocateFull  = 1;
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210

  m_pBestCS = new CodingStructure**[numWidths];
  m_pTempCS = new CodingStructure**[numWidths];

  m_pFullCS  = new CodingStructure***[numWidths];
  m_pSplitCS = new CodingStructure***[numWidths];

  for( uint32_t width = 0; width < numWidths; width++ )
  {
    m_pBestCS[width] = new CodingStructure*[numHeights];
    m_pTempCS[width] = new CodingStructure*[numHeights];

    m_pFullCS [width] = new CodingStructure**[numHeights];
    m_pSplitCS[width] = new CodingStructure**[numHeights];

    for( uint32_t height = 0; height < numHeights; height++ )
    {
Karsten Suehring's avatar
Karsten Suehring committed
211
      if(  gp_sizeIdxInfo->isCuSize( gp_sizeIdxInfo->sizeFrom( width ) ) && gp_sizeIdxInfo->isCuSize( gp_sizeIdxInfo->sizeFrom( height ) ) )
212
213
214
215
216
217
218
219
220
221
222
223
224
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
      {
        m_pBestCS[width][height] = new CodingStructure( m_unitCache.cuCache, m_unitCache.puCache, m_unitCache.tuCache );
        m_pTempCS[width][height] = new CodingStructure( m_unitCache.cuCache, m_unitCache.puCache, m_unitCache.tuCache );

        m_pBestCS[width][height]->create( m_pcEncCfg->getChromaFormatIdc(), Area( 0, 0, gp_sizeIdxInfo->sizeFrom( width ), gp_sizeIdxInfo->sizeFrom( height ) ), false );
        m_pTempCS[width][height]->create( m_pcEncCfg->getChromaFormatIdc(), Area( 0, 0, gp_sizeIdxInfo->sizeFrom( width ), gp_sizeIdxInfo->sizeFrom( height ) ), false );
        m_pFullCS [width][height] = new CodingStructure*[uiNumLayersToAllocateFull];
        m_pSplitCS[width][height] = new CodingStructure*[uiNumLayersToAllocateSplit];

        for( uint32_t layer = 0; layer < uiNumLayersToAllocateFull; layer++ )
        {
          m_pFullCS [width][height][layer] = new CodingStructure( m_unitCache.cuCache, m_unitCache.puCache, m_unitCache.tuCache );

          m_pFullCS [width][height][layer]->create( m_pcEncCfg->getChromaFormatIdc(), Area( 0, 0, gp_sizeIdxInfo->sizeFrom( width ), gp_sizeIdxInfo->sizeFrom( height ) ), false );
        }

        for( uint32_t layer = 0; layer < uiNumLayersToAllocateSplit; layer++ )
        {
          m_pSplitCS[width][height][layer] = new CodingStructure( m_unitCache.cuCache, m_unitCache.puCache, m_unitCache.tuCache );

          m_pSplitCS[width][height][layer]->create( m_pcEncCfg->getChromaFormatIdc(), Area( 0, 0, gp_sizeIdxInfo->sizeFrom( width ), gp_sizeIdxInfo->sizeFrom( height ) ), false );
        }
      }
      else
      {
        m_pBestCS[width][height] = nullptr;
        m_pTempCS[width][height] = nullptr;

        m_pFullCS [width][height] = nullptr;
        m_pSplitCS[width][height] = nullptr;
      }
    }
  }

  const int uiNumSaveLayersToAllocate = 2;

  m_pSaveCS = new CodingStructure*[uiNumSaveLayersToAllocate];

  for( uint32_t depth = 0; depth < uiNumSaveLayersToAllocate; depth++ )
  {
    m_pSaveCS[depth] = new CodingStructure( m_unitCache.cuCache, m_unitCache.puCache, m_unitCache.tuCache );
    m_pSaveCS[depth]->create( UnitArea( cform, Area( 0, 0, maxCUWidth, maxCUHeight ) ), false );
  }

  m_isInitialized = true;
}


//////////////////////////////////////////////////////////////////////////
// INTRA PREDICTION
//////////////////////////////////////////////////////////////////////////

void IntraSearch::estIntraPredLumaQT( CodingUnit &cu, Partitioner &partitioner )
{
  CodingStructure       &cs            = *cu.cs;
  const SPS             &sps           = *cs.sps;
Karsten Suehring's avatar
Karsten Suehring committed
268
  const uint32_t             uiWidthBit    = g_aucLog2[partitioner.currArea().lwidth() ];
269
270
271
272
273
274
275
276
277
278
  const uint32_t             uiHeightBit   =                   g_aucLog2[partitioner.currArea().lheight()];

  // Lambda calculation at equivalent Qp of 4 is recommended because at that Qp, the quantization divisor is 1.
  const double sqrtLambdaForFirstPass = m_pcRdCost->getMotionLambda(cu.transQuantBypass) / double(1 << SCALE_BITS);


  //===== loop over partitions =====

  const TempCtx ctxStart          ( m_CtxCache, m_CABACEstimator->getCtx() );
  const TempCtx ctxStartIntraMode ( m_CtxCache, SubCtx( Ctx::IPredMode[CHANNEL_TYPE_LUMA],        m_CABACEstimator->getCtx() ) );
Paul Keydel's avatar
bugfix    
Paul Keydel committed
279
280
  const TempCtx ctxStartMHIntraMode ( m_CtxCache, SubCtx( Ctx::MHIntraPredMode,        m_CABACEstimator->getCtx() ) );
  const TempCtx ctxStartMrlIdx      ( m_CtxCache, SubCtx( Ctx::MultiRefLineIdx,        m_CABACEstimator->getCtx() ) );
281
282
283
284
285
286
287

  CHECK( !cu.firstPU, "CU has no PUs" );
  const bool keepResi   = cs.pps->getPpsRangeExtension().getCrossComponentPredictionEnabledFlag() || KEEP_PRED_AND_RESI_SIGNALS;


  uint32_t extraModes = 0; // add two extra modes, which would be used after uiMode <= DC_IDX is removed for cu.nsstIdx == 3

Tung Nguyen's avatar
Tung Nguyen committed
288
#if !JVET_M0464_UNI_MTS
289
290
291
292
293
294
295
296
  const int width   = partitioner.currArea().lwidth();
  const int height  = partitioner.currArea().lheight();

  // Marking EMT usage for faster EMT
  // 0: EMT is either not applicable for current CU (cuWidth > EMT_INTRA_MAX_CU or cuHeight > EMT_INTRA_MAX_CU), not active in the config file or the fast decision algorithm is not used in this case
  // 1: EMT fast algorithm can be applied for the current CU, and the DCT2 is being checked
  // 2: EMT is being checked for current CU. Stored results of DCT2 can be utilized for speedup
  uint8_t emtUsageFlag = 0;
Karsten Suehring's avatar
Karsten Suehring committed
297
  const int maxSizeEMT = EMT_INTRA_MAX_CU_WITH_QTBT;
298
299
300
301
302
303
304
  if( width <= maxSizeEMT && height <= maxSizeEMT && sps.getSpsNext().getUseIntraEMT() )
  {
    emtUsageFlag = cu.emtFlag == 1 ? 2 : 1;
  }

  bool isAllIntra = m_pcEncCfg->getIntraPeriod() == 1;

Karsten Suehring's avatar
Karsten Suehring committed
305
  if( width * height < 64 && !isAllIntra )
306
  {
Karsten Suehring's avatar
Karsten Suehring committed
307
    emtUsageFlag = 0; //this forces the recalculation of the candidates list. Why is this necessary? (to be checked)
308
  }
Tung Nguyen's avatar
Tung Nguyen committed
309
#endif
310
311
312
313
314

  static_vector<uint32_t,   FAST_UDI_MAX_RDMODE_NUM> uiHadModeList;
  static_vector<double, FAST_UDI_MAX_RDMODE_NUM> CandCostList;
  static_vector<double, FAST_UDI_MAX_RDMODE_NUM> CandHadList;

315
316
317
  static_vector<int, FAST_UDI_MAX_RDMODE_NUM> extendRefList;
  static_vector<int, FAST_UDI_MAX_RDMODE_NUM>* nullList = NULL;

318
  auto &pu = *cu.firstPU;
Tung Nguyen's avatar
Tung Nguyen committed
319
#if !JVET_M0464_UNI_MTS
320
  int puIndex = 0;
Tung Nguyen's avatar
Tung Nguyen committed
321
#endif
322
323
324
325
  {
    CandHadList.clear();
    CandCostList.clear();
    uiHadModeList.clear();
326
    extendRefList.clear();
327
328
329
330
331
332
333
334

    CHECK(pu.cu != &cu, "PU is not contained in the CU");

    //===== determine set of modes to be tested (using prediction signal only) =====
    int numModesAvailable = NUM_LUMA_MODE; // total number of Intra modes
    static_vector< uint32_t, FAST_UDI_MAX_RDMODE_NUM > uiRdModeList;

    int numModesForFullRD = 3;
Karsten Suehring's avatar
Karsten Suehring committed
335
    numModesForFullRD = g_aucIntraModeNumFast_UseMPM_2D[uiWidthBit - MIN_CU_LOG2][uiHeightBit - MIN_CU_LOG2];
336
337
338
339
340

#if INTRA_FULL_SEARCH
    numModesForFullRD = numModesAvailable;
#endif

Tung Nguyen's avatar
Tung Nguyen committed
341
#if !JVET_M0464_UNI_MTS
342
    if( emtUsageFlag != 2 )
Tung Nguyen's avatar
Tung Nguyen committed
343
#endif
344
345
346
    {
      // this should always be true
      CHECK( !pu.Y().valid(), "PU is not valid" );
347
348
349
      bool isFirstLineOfCtu = (((pu.block(COMPONENT_Y).y)&((pu.cs->sps)->getMaxCUWidth() - 1)) == 0);
      int numOfPassesExtendRef = (isFirstLineOfCtu ? 1 : MRL_NUM_REF_LINES);
      pu.multiRefIdx = 0;
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

      //===== init pattern for luma prediction =====
      initIntraPatternChType( cu, pu.Y(), IntraPrediction::useFilteredIntraRefSamples( COMPONENT_Y, pu, false, pu ) );
      if( numModesForFullRD != numModesAvailable )
      {
        CHECK( numModesForFullRD >= numModesAvailable, "Too many modes for full RD search" );

        const CompArea &area = pu.Y();

        PelBuf piOrg         = cs.getOrgBuf(area);
        PelBuf piPred        = cs.getPredBuf(area);

        DistParam distParam;

        const bool bUseHadamard = cu.transQuantBypass == 0;

        m_pcRdCost->setDistParam(distParam, piOrg, piPred, sps.getBitDepth(CHANNEL_TYPE_LUMA), COMPONENT_Y, bUseHadamard);

        distParam.applyWeight = false;

        bool bSatdChecked[NUM_INTRA_MODE];
        memset( bSatdChecked, 0, sizeof( bSatdChecked ) );

        {
          for( int modeIdx = 0; modeIdx < numModesAvailable; modeIdx++ )
          {
            uint32_t       uiMode = modeIdx;
            Distortion uiSad  = 0;

            // Skip checking extended Angular modes in the first round of SATD
            if( uiMode > DC_IDX && ( uiMode & 1 ) )
            {
              continue;
            }

            bSatdChecked[uiMode] = true;

            pu.intraDir[0] = modeIdx;

            if( useDPCMForFirstPassIntraEstimation( pu, uiMode ) )
            {
              encPredIntraDPCM( COMPONENT_Y, piOrg, piPred, uiMode );
            }
            else
            {
              predIntraAng( COMPONENT_Y, piPred, pu, IntraPrediction::useFilteredIntraRefSamples( COMPONENT_Y, pu, true, pu ) );
            }
            // use Hadamard transform here
            uiSad += distParam.distFunc(distParam);

            // NB xFracModeBitsIntra will not affect the mode for chroma that may have already been pre-estimated.
            m_CABACEstimator->getCtx() = SubCtx( Ctx::IPredMode[CHANNEL_TYPE_LUMA], ctxStartIntraMode );
Paul Keydel's avatar
bugfix    
Paul Keydel committed
402
403
            m_CABACEstimator->getCtx() = SubCtx( Ctx::MHIntraPredMode, ctxStartMHIntraMode );
            m_CABACEstimator->getCtx() = SubCtx( Ctx::MultiRefLineIdx, ctxStartMrlIdx );
404
405
406
407
408
409
410

            uint64_t fracModeBits = xFracModeBitsIntra(pu, uiMode, CHANNEL_TYPE_LUMA);

            double cost = ( double ) uiSad + ( double ) fracModeBits * sqrtLambdaForFirstPass;

            DTRACE( g_trace_ctx, D_INTRA_COST, "IntraHAD: %u, %llu, %f (%d)\n", uiSad, fracModeBits, cost, uiMode );

411
412
413
414
415
416
            updateCandList( uiMode, cost,  uiRdModeList, CandCostList
              , extendRefList, 0
              , numModesForFullRD + extraModes );
            updateCandList(uiMode, (double) uiSad, uiHadModeList, CandHadList
              , *nullList, -1
              , 3 + extraModes);
417
418
419
420
421
          }
        } // NSSTFlag

        // forget the extra modes
        uiRdModeList.resize( numModesForFullRD );
422
423
        CandCostList.resize(numModesForFullRD);
        extendRefList.resize(numModesForFullRD);
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
451
452
453
454
        static_vector<unsigned, FAST_UDI_MAX_RDMODE_NUM> parentCandList(FAST_UDI_MAX_RDMODE_NUM);
        std::copy_n(uiRdModeList.begin(), numModesForFullRD, parentCandList.begin());

        // Second round of SATD for extended Angular modes
        for (int modeIdx = 0; modeIdx < numModesForFullRD; modeIdx++)
        {
          unsigned parentMode = parentCandList[modeIdx];
          if (parentMode > (DC_IDX + 1) && parentMode < (NUM_LUMA_MODE - 1))
          {
            for (int subModeIdx = -1; subModeIdx <= 1; subModeIdx += 2)
            {
              unsigned mode = parentMode + subModeIdx;


              if (!bSatdChecked[mode])
              {
                pu.intraDir[0] = mode;

                if (useDPCMForFirstPassIntraEstimation(pu, mode))
                {
                  encPredIntraDPCM(COMPONENT_Y, piOrg, piPred, mode);
                }
                else
                {
                  predIntraAng(COMPONENT_Y, piPred, pu,
                               IntraPrediction::useFilteredIntraRefSamples(COMPONENT_Y, pu, true, pu));
                }
                // use Hadamard transform here
                Distortion sad = distParam.distFunc(distParam);

                // NB xFracModeBitsIntra will not affect the mode for chroma that may have already been pre-estimated.
Paul Keydel's avatar
bugfix    
Paul Keydel committed
455
456
457
                m_CABACEstimator->getCtx() = SubCtx( Ctx::IPredMode[CHANNEL_TYPE_LUMA], ctxStartIntraMode );
                m_CABACEstimator->getCtx() = SubCtx( Ctx::MHIntraPredMode, ctxStartMHIntraMode );
                m_CABACEstimator->getCtx() = SubCtx( Ctx::MultiRefLineIdx, ctxStartMrlIdx );
458
459
460
461
462

                uint64_t fracModeBits = xFracModeBitsIntra(pu, mode, CHANNEL_TYPE_LUMA);

                double cost = (double) sad + (double) fracModeBits * sqrtLambdaForFirstPass;

463
464
465
466
467
468
                updateCandList(mode, cost, uiRdModeList, CandCostList
                  , extendRefList, 0
                  , numModesForFullRD);
                updateCandList(mode, (double)sad, uiHadModeList, CandHadList
                  , *nullList, -1
                  , 3);
469
470
471
472
473
474

                bSatdChecked[mode] = true;
              }
            }
          }
        }
475
        pu.multiRefIdx = 1;
476
477
        const int  numMPMs = NUM_MOST_PROBABLE_MODES;
        unsigned  multiRefMPM [numMPMs];
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
        PU::getIntraMPMs(pu, multiRefMPM);
        for (int mRefNum = 1; mRefNum < numOfPassesExtendRef; mRefNum++)
        {
          int multiRefIdx = MULTI_REF_LINE_IDX[mRefNum];

          pu.multiRefIdx = multiRefIdx;
          {
            initIntraPatternChType(cu, pu.Y(), IntraPrediction::useFilteredIntraRefSamples(COMPONENT_Y, pu, false, pu));
          }
          for (int x = 0; x < numMPMs; x++)
          {
            uint32_t mode = multiRefMPM[x];
            {
              pu.intraDir[0] = mode;

              if (useDPCMForFirstPassIntraEstimation(pu, mode))
              {
                encPredIntraDPCM(COMPONENT_Y, piOrg, piPred, mode);
              }
              else
              {
                predIntraAng(COMPONENT_Y, piPred, pu, IntraPrediction::useFilteredIntraRefSamples(COMPONENT_Y, pu, true, pu));
              }

              // use Hadamard transform here
              Distortion sad = distParam.distFunc(distParam);

              // NB xFracModeBitsIntra will not affect the mode for chroma that may have already been pre-estimated.
Paul Keydel's avatar
bugfix    
Paul Keydel committed
506
507
508
              m_CABACEstimator->getCtx() = SubCtx( Ctx::IPredMode[CHANNEL_TYPE_LUMA], ctxStartIntraMode );
              m_CABACEstimator->getCtx() = SubCtx( Ctx::MHIntraPredMode, ctxStartMHIntraMode );
              m_CABACEstimator->getCtx() = SubCtx( Ctx::MultiRefLineIdx, ctxStartMrlIdx );
509
510
511
512
513
514
515
516
517
518

              uint64_t fracModeBits = xFracModeBitsIntra(pu, mode, CHANNEL_TYPE_LUMA);

              double cost = (double)sad + (double)fracModeBits * sqrtLambdaForFirstPass;
              updateCandList(mode, cost, uiRdModeList, CandCostList, extendRefList, multiRefIdx, numModesForFullRD);
            }
          }
        }
        CandCostList.resize(numModesForFullRD);
        extendRefList.resize(numModesForFullRD);
519
520
        if( m_pcEncCfg->getFastUDIUseMPMEnabled() )
        {
521
522
          const int numMPMs = NUM_MOST_PROBABLE_MODES;
          unsigned  uiPreds[numMPMs];
523

524
525
          pu.multiRefIdx = 0;

526
527
528
529
530
531
532
533
534
535
          const int numCand = PU::getIntraMPMs( pu, uiPreds );

          for( int j = 0; j < numCand; j++ )
          {
            bool mostProbableModeIncluded = false;
            int  mostProbableMode         = uiPreds[j];


            for( int i = 0; i < numModesForFullRD; i++ )
            {
536
              mostProbableModeIncluded |= (mostProbableMode == uiRdModeList[i] && extendRefList[i] == 0);
537
538
539
            }
            if( !mostProbableModeIncluded )
            {
540
              extendRefList.push_back(0);
541
542
543
544
545
546
547
548
549
550
551
552
553
              numModesForFullRD++;
              uiRdModeList.push_back( mostProbableMode );
            }
          }
        }
      }
      else
      {
        for( int i = 0; i < numModesForFullRD; i++ )
        {
          uiRdModeList.push_back( i );
        }
      }
Tung Nguyen's avatar
Tung Nguyen committed
554
#if !JVET_M0464_UNI_MTS
555
556
557
558
559
      if( emtUsageFlag == 1 )
      {
        // Store the modes to be checked with RD
        m_savedNumRdModes[puIndex] = numModesForFullRD;
        std::copy_n( uiRdModeList.begin(), numModesForFullRD, m_savedRdModeList[puIndex] );
560
        std::copy_n(extendRefList.begin(), numModesForFullRD, m_savedExtendRefList[puIndex]);
561
      }
Tung Nguyen's avatar
Tung Nguyen committed
562
#endif
563
    }
Tung Nguyen's avatar
Tung Nguyen committed
564
#if !JVET_M0464_UNI_MTS
565
566
567
568
    else //emtUsage = 2 (here we potentially reduce the number of modes that will be full-RD checked)
    {
      if( isAllIntra && m_pcEncCfg->getFastIntraEMT() )
      {
Karsten Suehring's avatar
Karsten Suehring committed
569
        double thresholdSkipMode = 1.0 + 1.4 / sqrt( ( double ) ( width*height ) );
570
571
572
573
574
575
576
577
578

        numModesForFullRD = 0;

        // Skip checking the modes with much larger R-D cost than the best mode
        for( int i = 0; i < m_savedNumRdModes[puIndex]; i++ )
        {
          if( m_modeCostStore[puIndex][i] <= thresholdSkipMode * m_bestModeCostStore[puIndex] )
          {
            uiRdModeList.push_back( m_savedRdModeList[puIndex][i] );
579
            extendRefList.push_back(m_savedExtendRefList[puIndex][i]);
580
581
582
583
584
585
586
587
588
589
            numModesForFullRD++;
          }
        }
      }
      else //this is necessary because we skip the candidates list calculation, since it was already obtained for the DCT-II. Now we load it
      {
        // Restore the modes to be checked with RD
        numModesForFullRD = m_savedNumRdModes[puIndex];
        uiRdModeList.resize( numModesForFullRD );
        std::copy_n( m_savedRdModeList[puIndex], m_savedNumRdModes[puIndex], uiRdModeList.begin() );
590
591
592
        CandCostList.resize(numModesForFullRD);
        extendRefList.resize(numModesForFullRD);
        std::copy_n(m_savedExtendRefList[puIndex], m_savedNumRdModes[puIndex], extendRefList.begin());
593
594
      }
    }
Tung Nguyen's avatar
Tung Nguyen committed
595
#endif
596
597
598
599
600
601
602


    CHECK( numModesForFullRD != uiRdModeList.size(), "Inconsistent state!" );

    // after this point, don't use numModesForFullRD

    // PBINTRA fast
Tung Nguyen's avatar
Tung Nguyen committed
603
604
605
#if JVET_M0464_UNI_MTS
    if( m_pcEncCfg->getUsePbIntraFast() && !cs.slice->isIntra() && uiRdModeList.size() < numModesAvailable )
#else
Karsten Suehring's avatar
Karsten Suehring committed
606
    if( m_pcEncCfg->getUsePbIntraFast() && !cs.slice->isIntra() && uiRdModeList.size() < numModesAvailable && emtUsageFlag != 2 )
Tung Nguyen's avatar
Tung Nguyen committed
607
#endif
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
    {
      if( CandHadList.size() < 3 || CandHadList[2] > cs.interHad * PBINTRA_RATIO )
      {
        uiRdModeList.resize( std::min<size_t>( uiRdModeList.size(), 2 ) );
      }
      if( CandHadList.size() < 2 || CandHadList[1] > cs.interHad * PBINTRA_RATIO )
      {
        uiRdModeList.resize( std::min<size_t>( uiRdModeList.size(), 1 ) );
      }
      if( CandHadList.size() < 1 || CandHadList[0] > cs.interHad * PBINTRA_RATIO )
      {
        cs.dist = std::numeric_limits<Distortion>::max();
        cs.interHad = 0;

        //===== reset context models =====
Paul Keydel's avatar
bugfix    
Paul Keydel committed
623
624
625
        m_CABACEstimator->getCtx() = SubCtx( Ctx::IPredMode[CHANNEL_TYPE_LUMA], ctxStartIntraMode );
        m_CABACEstimator->getCtx() = SubCtx( Ctx::MHIntraPredMode, ctxStartMHIntraMode );
        m_CABACEstimator->getCtx() = SubCtx( Ctx::MultiRefLineIdx, ctxStartMrlIdx );
626
627
628
629
630
631
632

        return;
      }
    }

    //===== check modes (using r-d costs) =====
    uint32_t       uiBestPUMode  = 0;
633
    int            bestExtendRef = 0;
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650

    CodingStructure *csTemp = m_pTempCS[gp_sizeIdxInfo->idxFrom( cu.lwidth() )][gp_sizeIdxInfo->idxFrom( cu.lheight() )];
    CodingStructure *csBest = m_pBestCS[gp_sizeIdxInfo->idxFrom( cu.lwidth() )][gp_sizeIdxInfo->idxFrom( cu.lheight() )];

    csTemp->slice = cs.slice;
    csBest->slice = cs.slice;
    csTemp->initStructData();
    csBest->initStructData();

    // just to be sure
    numModesForFullRD = ( int ) uiRdModeList.size();
    for (uint32_t uiMode = 0; uiMode < numModesForFullRD; uiMode++)
    {
      // set luma prediction mode
      uint32_t uiOrgMode = uiRdModeList[uiMode];

      pu.intraDir[0] = uiOrgMode;
651
652
653
      int multiRefIdx = extendRefList[uiMode];
      pu.multiRefIdx  = multiRefIdx;
      CHECK(pu.multiRefIdx && (pu.intraDir[0] == DC_IDX || pu.intraDir[0] == PLANAR_IDX), "ERL");
654
655
656
657
658
659
660
661
662
663


      // set context models
      m_CABACEstimator->getCtx() = ctxStart;

      // determine residual for partition
      cs.initSubStructure( *csTemp, partitioner.chType, cs.area, true );

      xRecurIntraCodingLumaQT( *csTemp, partitioner );

Tung Nguyen's avatar
Tung Nguyen committed
664
#if !JVET_M0464_UNI_MTS
665
666
667
668
      if( emtUsageFlag == 1 && m_pcEncCfg->getFastIntraEMT() )
      {
        m_modeCostStore[puIndex][uiMode] = csTemp->cost; //cs.cost;
      }
Tung Nguyen's avatar
Tung Nguyen committed
669
#endif
670
671
672
673
674
675
676
677
678

      DTRACE( g_trace_ctx, D_INTRA_COST, "IntraCost T %f (%d) \n", csTemp->cost, uiOrgMode );

      // check r-d cost
      if( csTemp->cost < csBest->cost )
      {
        std::swap( csTemp, csBest );

        uiBestPUMode  = uiOrgMode;
679
        bestExtendRef = multiRefIdx;
Tung Nguyen's avatar
Tung Nguyen committed
680
#if !JVET_M0464_UNI_MTS
681
682
683
684
        if( ( emtUsageFlag == 1 ) && m_pcEncCfg->getFastIntraEMT() )
        {
          m_bestModeCostStore[puIndex] = csBest->cost; //cs.cost;
        }
Tung Nguyen's avatar
Tung Nguyen committed
685
#endif
686
687
688
689
690
691
692
693
694
695
      }

      csTemp->releaseIntermediateData();
    } // Mode loop

    cs.useSubStructure( *csBest, partitioner.chType, pu.singleChan( CHANNEL_TYPE_LUMA ), KEEP_PRED_AND_RESI_SIGNALS, true, keepResi, keepResi );

    csBest->releaseIntermediateData();
    //=== update PU data ====
    pu.intraDir[0] = uiBestPUMode;
696
    pu.multiRefIdx = bestExtendRef;
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
  }

  //===== reset context models =====
  m_CABACEstimator->getCtx() = ctxStart;
}

void IntraSearch::estIntraPredChromaQT(CodingUnit &cu, Partitioner &partitioner)
{
  const ChromaFormat format   = cu.chromaFormat;
  const uint32_t    numberValidComponents = getNumberValidComponents(format);
  CodingStructure &cs = *cu.cs;
  const TempCtx ctxStart  ( m_CtxCache, m_CABACEstimator->getCtx() );

  cs.setDecomp( cs.area.Cb(), false );

  auto &pu = *cu.firstPU;

  {
    uint32_t       uiBestMode = 0;
    Distortion uiBestDist = 0;
    double     dBestCost = MAX_DOUBLE;

    //----- init mode list ----
    {
      uint32_t  uiMinMode = 0;
      uint32_t  uiMaxMode = NUM_CHROMA_MODE;

      //----- check chroma modes -----
      uint32_t chromaCandModes[ NUM_CHROMA_MODE ];
      PU::getIntraChromaCandModes( pu, chromaCandModes );

      // create a temporary CS
      CodingStructure &saveCS = *m_pSaveCS[0];
      saveCS.pcv      = cs.pcv;
      saveCS.picture  = cs.picture;
      saveCS.area.repositionTo( cs.area );
      saveCS.clearTUs();

      if( CS::isDualITree( cs ) )
      {
        if( partitioner.canSplit( TU_MAX_TR_SPLIT, cs ) )
        {
          partitioner.splitCurrArea( TU_MAX_TR_SPLIT, cs );

          do
          {
            cs.addTU( CS::getArea( cs, partitioner.currArea(), partitioner.chType ), partitioner.chType ).depth = partitioner.currTrDepth;
          } while( partitioner.nextPart( cs ) );

          partitioner.exitCurrSplit();
        }
        else
        cs.addTU( CS::getArea( cs, partitioner.currArea(), partitioner.chType ), partitioner.chType );
      }

      std::vector<TransformUnit*> orgTUs;


      // create a store for the TUs
      for( const auto &ptu : cs.tus )
      {
        // for split TUs in HEVC, add the TUs without Chroma parts for correct setting of Cbfs
Karsten Suehring's avatar
Karsten Suehring committed
759
        if( pu.contains( *ptu, CHANNEL_TYPE_CHROMA ) )
760
761
762
763
764
        {
          saveCS.addTU( *ptu, partitioner.chType );
          orgTUs.push_back( ptu );
        }
      }
Xiang Ma's avatar
Xiang Ma committed
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
      // SATD pre-selecting.
      int satdModeList[NUM_CHROMA_MODE];
      int64_t satdSortedCost[NUM_CHROMA_MODE];
      for (int i = 0; i < NUM_CHROMA_MODE; i++)
      {
        satdSortedCost[i] = 0; // for the mode not pre-select by SATD, do RDO by default, so set the initial value 0.
        satdModeList[i] = 0;
      }
      bool modeIsEnable[NUM_INTRA_MODE + 1]; // use intra mode idx to check whether enable
      for (int i = 0; i < NUM_INTRA_MODE + 1; i++)
      {
        modeIsEnable[i] = 1;
      }

      DistParam distParam;
      const bool useHadamard = true;
      pu.intraDir[1] = MDLM_L_IDX; // temporary assigned, just to indicate this is a MDLM mode. for luma down-sampling operation.

      initIntraPatternChType(cu, pu.Cb());
      initIntraPatternChType(cu, pu.Cr());
      xGetLumaRecPixels(pu, pu.Cb());

      for (int idx = uiMinMode; idx <= uiMaxMode - 1; idx++)
      {
        int mode = chromaCandModes[idx];
        satdModeList[idx] = mode;
        if (PU::isLMCMode(mode) && !PU::isLMCModeEnabled(pu, mode))
        {
          continue;
        }
795
        if ((mode == LM_CHROMA_IDX) || (mode == PLANAR_IDX) || (mode == DM_CHROMA_IDX)) // only pre-check regular modes and MDLM modes, not including DM ,Planar, and LM
Xiang Ma's avatar
Xiang Ma committed
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
        {
          continue;
        }
        pu.intraDir[1] = mode; // temporary assigned, for SATD checking.

        int64_t sad = 0;
        CodingStructure& cs = *(pu.cs);

        CompArea areaCb = pu.Cb();
        PelBuf orgCb = cs.getOrgBuf(areaCb);
        PelBuf predCb = cs.getPredBuf(areaCb);

        m_pcRdCost->setDistParam(distParam, orgCb, predCb, pu.cs->sps->getBitDepth(CHANNEL_TYPE_CHROMA), COMPONENT_Cb, useHadamard);
        distParam.applyWeight = false;

        if (PU::isLMCMode(mode))
        {
          predIntraChromaLM(COMPONENT_Cb, predCb, pu, areaCb, mode);
        }
        else
        {
          predIntraAng(COMPONENT_Cb, predCb, pu, false);
        }

        sad += distParam.distFunc(distParam);
821

Xiang Ma's avatar
Xiang Ma committed
822
823
824
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
859
860
861
862
863
864
        CompArea areaCr = pu.Cr();
        PelBuf orgCr = cs.getOrgBuf(areaCr);
        PelBuf predCr = cs.getPredBuf(areaCr);

        m_pcRdCost->setDistParam(distParam, orgCr, predCr, pu.cs->sps->getBitDepth(CHANNEL_TYPE_CHROMA), COMPONENT_Cr, useHadamard);
        distParam.applyWeight = false;

        if (PU::isLMCMode(mode))
        {
          predIntraChromaLM(COMPONENT_Cr, predCr, pu, areaCr, mode);
        }
        else
        {
          predIntraAng(COMPONENT_Cr, predCr, pu, false);
        }
        sad += distParam.distFunc(distParam);
        satdSortedCost[idx] = sad;
      }
      // sort the mode based on the cost from small to large.
      int tempIdx = 0;
      int64_t tempCost = 0;
      for (int i = uiMinMode; i <= uiMaxMode - 1; i++)
      {
        for (int j = i + 1; j <= uiMaxMode - 1; j++)
        {
          if (satdSortedCost[j] < satdSortedCost[i])
          {
            tempIdx = satdModeList[i];
            satdModeList[i] = satdModeList[j];
            satdModeList[j] = tempIdx;

            tempCost = satdSortedCost[i];
            satdSortedCost[i] = satdSortedCost[j];
            satdSortedCost[j] = tempCost;

          }
        }
      }
      int reducedModeNumber = 2; // reduce the number of chroma modes
      for (int i = 0; i < reducedModeNumber; i++)
      {
        modeIsEnable[satdModeList[uiMaxMode - 1 - i]] = 0; // disable the last reducedModeNumber modes
      }
865
866
867
868
869
870
871
872
873
874
875

      // save the dist
      Distortion baseDist = cs.dist;

      for (uint32_t uiMode = uiMinMode; uiMode < uiMaxMode; uiMode++)
      {
        const int chromaIntraMode = chromaCandModes[uiMode];
        if( PU::isLMCMode( chromaIntraMode ) && ! PU::isLMCModeEnabled( pu, chromaIntraMode ) )
        {
          continue;
        }
Xiang Ma's avatar
Xiang Ma committed
876
877
878
879
        if (!modeIsEnable[chromaIntraMode] && PU::isLMCModeEnabled(pu, chromaIntraMode)) // when CCLM is disable, then MDLM is disable. not use satd checking
        {
          continue;
        }
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
        cs.setDecomp( pu.Cb(), false );
        cs.dist = baseDist;
        //----- restore context models -----
        m_CABACEstimator->getCtx() = ctxStart;

        //----- chroma coding -----
        pu.intraDir[1] = chromaIntraMode;

        xRecurIntraChromaCodingQT( cs, partitioner );

        if (cs.pps->getUseTransformSkip())
        {
          m_CABACEstimator->getCtx() = ctxStart;
        }

        uint64_t fracBits   = xGetIntraFracBitsQT( cs, partitioner, false, true );
        Distortion uiDist = cs.dist;
        double    dCost   = m_pcRdCost->calcRdCost( fracBits, uiDist - baseDist );

        //----- compare -----
        if( dCost < dBestCost )
        {
          for( uint32_t i = getFirstComponentOfChannel( CHANNEL_TYPE_CHROMA ); i < numberValidComponents; i++ )
          {
            const CompArea &area = pu.blocks[i];

            saveCS.getRecoBuf     ( area ).copyFrom( cs.getRecoBuf   ( area ) );
#if KEEP_PRED_AND_RESI_SIGNALS
            saveCS.getPredBuf     ( area ).copyFrom( cs.getPredBuf   ( area ) );
            saveCS.getResiBuf     ( area ).copyFrom( cs.getResiBuf   ( area ) );
#endif
            cs.picture->getRecoBuf( area ).copyFrom( cs.getRecoBuf( area ) );

            for( uint32_t j = 0; j < saveCS.tus.size(); j++ )
            {
              saveCS.tus[j]->copyComponentFrom( *orgTUs[j], area.compID );
            }
          }

          dBestCost  = dCost;
          uiBestDist = uiDist;
          uiBestMode = chromaIntraMode;
        }
      }

      for( uint32_t i = getFirstComponentOfChannel( CHANNEL_TYPE_CHROMA ); i < numberValidComponents; i++ )
      {
        const CompArea &area = pu.blocks[i];

        cs.getRecoBuf         ( area ).copyFrom( saveCS.getRecoBuf( area ) );
#if KEEP_PRED_AND_RESI_SIGNALS
        cs.getPredBuf         ( area ).copyFrom( saveCS.getPredBuf( area ) );
        cs.getResiBuf         ( area ).copyFrom( saveCS.getResiBuf( area ) );
#endif
        cs.picture->getRecoBuf( area ).copyFrom( cs.    getRecoBuf( area ) );

        for( uint32_t j = 0; j < saveCS.tus.size(); j++ )
        {
          orgTUs[ j ]->copyComponentFrom( *saveCS.tus[ j ], area.compID );
        }
      }
    }

    pu.intraDir[1] = uiBestMode;
    cs.dist        = uiBestDist;
  }

  //----- restore context models -----
  m_CABACEstimator->getCtx() = ctxStart;
}

void IntraSearch::IPCMSearch(CodingStructure &cs, Partitioner& partitioner)
{
953
954
955
  ComponentID compStr = (CS::isDualITree(cs) && !isLuma(partitioner.chType)) ? COMPONENT_Cb: COMPONENT_Y;
  ComponentID compEnd = (CS::isDualITree(cs) && isLuma(partitioner.chType)) ? COMPONENT_Y : COMPONENT_Cr;
  for( ComponentID compID = compStr; compID <= compEnd; compID = ComponentID(compID+1) )
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
  {

    xEncPCM(cs, partitioner, compID);
  }

  cs.getPredBuf().fill(0);
  cs.getResiBuf().fill(0);
  cs.getOrgResiBuf().fill(0);

  cs.dist     = 0;
  cs.fracBits = 0;
  cs.cost     = 0;

  cs.setDecomp(cs.area);
}

void IntraSearch::xEncPCM(CodingStructure &cs, Partitioner& partitioner, const ComponentID &compID)
{
  TransformUnit &tu = *cs.getTU( partitioner.chType );

  const int  channelBitDepth = cs.sps->getBitDepth(toChannelType(compID));
  const uint32_t uiPCMBitDepth = cs.sps->getPCMBitDepth(toChannelType(compID));

  const int pcmShiftRight = (channelBitDepth - int(uiPCMBitDepth));

  CompArea  area    = tu.blocks[compID];
  PelBuf    pcmBuf  = tu.getPcmbuf  (compID);
  PelBuf    recBuf  = cs.getRecoBuf ( area );
  CPelBuf   orgBuf  = cs.getOrgBuf  ( area );

  CHECK(pcmShiftRight < 0, "Negative shift");

  for (uint32_t uiY = 0; uiY < pcmBuf.height; uiY++)
  {
    for (uint32_t uiX = 0; uiX < pcmBuf.width; uiX++)
    {
      // Encode
      pcmBuf.at(uiX, uiY) = orgBuf.at(uiX, uiY) >> pcmShiftRight;
      // Reconstruction
      recBuf.at(uiX, uiY) = pcmBuf.at(uiX, uiY) << pcmShiftRight;
    }
  }
}

// -------------------------------------------------------------------------------------------------------------------
// Intra search
// -------------------------------------------------------------------------------------------------------------------

void IntraSearch::xEncIntraHeader(CodingStructure &cs, Partitioner &partitioner, const bool &bLuma, const bool &bChroma)
{
  CodingUnit &cu = *cs.getCU( partitioner.chType );

  if (bLuma)
  {
    bool isFirst = partitioner.currArea().lumaPos() == cs.area.lumaPos();

    // CU header
    if( isFirst )
    {
1015
      if( !cs.slice->isIntra() 
Xiaozhong Xu's avatar
Xiaozhong Xu committed
1016
        && cu.Y().valid()
1017
        )
1018
1019
1020
1021
1022
1023
1024
1025
      {
        if( cs.pps->getTransquantBypassEnabledFlag() )
        {
          m_CABACEstimator->cu_transquant_bypass_flag( cu );
        }
        m_CABACEstimator->cu_skip_flag( cu );
        m_CABACEstimator->pred_mode   ( cu );
      }
1026
      m_CABACEstimator->extend_ref_line(cu);
Karsten Suehring's avatar
Karsten Suehring committed
1027
      if( CU::isIntra(cu) )
1028
      {
1029
        m_CABACEstimator->pcm_data( cu, partitioner );
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
        if( cu.ipcm )
        {
          return;
        }
      }
    }

    PredictionUnit &pu = *cs.getPU(partitioner.currArea().lumaPos(), partitioner.chType);

    // luma prediction mode
Karsten Suehring's avatar
Karsten Suehring committed
1040
    if (isFirst)
1041
    {
Karsten Suehring's avatar
Karsten Suehring committed
1042
1043
1044
      if ( !cu.Y().valid())
        m_CABACEstimator->pred_mode( cu );
      m_CABACEstimator->intra_luma_pred_mode( pu );
1045
1046
1047
1048
1049
1050
1051
1052
1053
    }
  }

  if (bChroma)
  {
    bool isFirst = partitioner.currArea().Cb().valid() && partitioner.currArea().chromaPos() == cs.area.chromaPos();

    PredictionUnit &pu = *cs.getPU( partitioner.currArea().chromaPos(), CHANNEL_TYPE_CHROMA );

Karsten Suehring's avatar
Karsten Suehring committed
1054
    if( isFirst )
1055
    {
Karsten Suehring's avatar
Karsten Suehring committed
1056
      m_CABACEstimator->intra_chroma_pred_mode( pu );
1057
1058
1059
1060
1061
1062
1063
1064
    }
  }
}

void IntraSearch::xEncSubdivCbfQT(CodingStructure &cs, Partitioner &partitioner, const bool &bLuma, const bool &bChroma)
{
  const UnitArea &currArea = partitioner.currArea();
  TransformUnit &currTU    = *cs.getTU( currArea.blocks[partitioner.chType], partitioner.chType );
Tung Nguyen's avatar
Tung Nguyen committed
1065
#if !JVET_M0464_UNI_MTS
1066
  CodingUnit &currCU       = *currTU.cu;
Tung Nguyen's avatar
Tung Nguyen committed
1067
#endif
1068
1069
1070
1071
  uint32_t currDepth           = partitioner.currTrDepth;

  const bool subdiv        = currTU.depth > currDepth;

Karsten Suehring's avatar
Karsten Suehring committed
1072
  if( partitioner.canSplit( TU_MAX_TR_SPLIT, cs ) )
1073
  {
Karsten Suehring's avatar
Karsten Suehring committed
1074
1075
1076
1077
1078
    CHECK( !subdiv, "TU split implied" );
  }
  else
  {
    CHECK( subdiv, "No TU subdivision is allowed with QTBT" );
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
  }

  if (bChroma)
  {
    const uint32_t numberValidComponents = getNumberValidComponents(currArea.chromaFormat);

    for (uint32_t ch = COMPONENT_Cb; ch < numberValidComponents; ch++)
    {
      const ComponentID compID = ComponentID(ch);

      if( currDepth == 0 || TU::getCbfAtDepth( currTU, compID, currDepth - 1 ) )
      {
        const bool prevCbf = ( compID == COMPONENT_Cr ? TU::getCbfAtDepth( currTU, COMPONENT_Cb, currDepth ) : false );
        m_CABACEstimator->cbf_comp( cs, TU::getCbfAtDepth( currTU, compID, currDepth ), currArea.blocks[compID], currDepth, prevCbf );

      }
    }
  }

  if (subdiv)
  {
Tung Nguyen's avatar
Tung Nguyen committed
1100
#if !JVET_M0464_UNI_MTS
1101
    if( currDepth == 0 && bLuma ) m_CABACEstimator->emt_cu_flag( currCU );
Tung Nguyen's avatar
Tung Nguyen committed
1102
#endif
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119

    if( partitioner.canSplit( TU_MAX_TR_SPLIT, cs ) )
    {
      partitioner.splitCurrArea( TU_MAX_TR_SPLIT, cs );
    }
    else
    THROW( "Cannot perform an implicit split!" );

    do
    {
      xEncSubdivCbfQT( cs, partitioner, bLuma, bChroma );
    } while( partitioner.nextPart( cs ) );

    partitioner.exitCurrSplit();
  }
  else
  {
Tung Nguyen's avatar
Tung Nguyen committed
1120
#if !JVET_M0464_UNI_MTS
1121
    if( currDepth == 0 && bLuma && TU::getCbfAtDepth( currTU, COMPONENT_Y, 0 ) ) m_CABACEstimator->emt_cu_flag( currCU );
Tung Nguyen's avatar
Tung Nguyen committed
1122
#endif
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
    //===== Cbfs =====
    if (bLuma)
    {
      m_CABACEstimator->cbf_comp( cs, TU::getCbfAtDepth( currTU, COMPONENT_Y, currDepth ), currTU.Y(), currTU.depth );
    }
  }
}

void IntraSearch::xEncCoeffQT(CodingStructure &cs, Partitioner &partitioner, const ComponentID &compID)
{
  const UnitArea &currArea  = partitioner.currArea();
  TransformUnit &currTU     = *cs.getTU( currArea.blocks[partitioner.chType], partitioner.chType );
  uint32_t      currDepth       = partitioner.currTrDepth;
  const bool subdiv         = currTU.depth > currDepth;

  if (subdiv)
  {
    if (partitioner.canSplit(TU_MAX_TR_SPLIT, cs))
    {
      partitioner.splitCurrArea(TU_MAX_TR_SPLIT, cs);
    }
    else
      THROW("Implicit TU split not available!");

    do
    {
      xEncCoeffQT( cs, partitioner, compID );
    } while( partitioner.nextPart( cs ) );

    partitioner.exitCurrSplit();
  }
  else

  if( currArea.blocks[compID].valid() )
  {
    if( TU::hasCrossCompPredInfo( currTU, compID ) )
    {
      m_CABACEstimator->cross_comp_pred( currTU, compID );
    }
    if( TU::getCbf( currTU, compID ) )
    {
      m_CABACEstimator->residual_coding( currTU, compID );
    }
  }
}

uint64_t IntraSearch::xGetIntraFracBitsQT( CodingStructure &cs, Partitioner &partitioner, const bool &bLuma, const bool &bChroma )
{
  m_CABACEstimator->resetBits();

  xEncIntraHeader( cs, partitioner, bLuma, bChroma );
  xEncSubdivCbfQT( cs, partitioner, bLuma, bChroma );

  if( bLuma )
  {
    xEncCoeffQT( cs, partitioner, COMPONENT_Y );
  }
  if( bChroma )
  {
    xEncCoeffQT( cs, partitioner, COMPONENT_Cb );
    xEncCoeffQT( cs, partitioner, COMPONENT_Cr );
  }

  uint64_t fracBits = m_CABACEstimator->getEstFracBits();
  return fracBits;
}

uint64_t IntraSearch::xGetIntraFracBitsQTChroma(TransformUnit& currTU, const ComponentID &compID)
{
  m_CABACEstimator->resetBits();

  if( TU::hasCrossCompPredInfo( currTU, compID ) )
  {
    m_CABACEstimator->cross_comp_pred( currTU, compID );
  }
  if( TU::getCbf( currTU, compID ) )
  {
    m_CABACEstimator->residual_coding( currTU, compID );
  }

  uint64_t fracBits = m_CABACEstimator->getEstFracBits();
  return fracBits;
}

Tung Nguyen's avatar
Tung Nguyen committed
1207
1208
1209
#if JVET_M0464_UNI_MTS
void IntraSearch::xIntraCodingTUBlock(TransformUnit &tu, const ComponentID &compID, const bool &checkCrossCPrediction, Distortion& ruiDist, const int &default0Save1Load2, uint32_t* numSig, std::vector<TrMode>* trModes, const bool loadTr)
#else
1210
void IntraSearch::xIntraCodingTUBlock(TransformUnit &tu, const ComponentID &compID, const bool &checkCrossCPrediction, Distortion& ruiDist, const int &default0Save1Load2, uint32_t* numSig )
Tung Nguyen's avatar
Tung Nguyen committed
1211
#endif
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
{
  if (!tu.blocks[compID].valid())
  {
    return;
  }

  CodingStructure &cs                       = *tu.cs;

  const CompArea      &area                 = tu.blocks[compID];
  const SPS           &sps                  = *cs.sps;
  const PPS           &pps                  = *cs.pps;

  const ChannelType    chType               = toChannelType(compID);
  const int            bitDepth             = sps.getBitDepth(chType);

  PelBuf         piOrg                      = cs.getOrgBuf    (area);
  PelBuf         piPred                     = cs.getPredBuf   (area);
  PelBuf         piResi                     = cs.getResiBuf   (area);
  PelBuf         piOrgResi                  = cs.getOrgResiBuf(area);
  PelBuf         piReco                     = cs.getRecoBuf   (area);

  const PredictionUnit &pu                  = *cs.getPU(area.pos(), chType);
  const uint32_t           uiChFinalMode        = PU::getFinalIntraMode(pu, chType);

  const bool           bUseCrossCPrediction = pps.getPpsRangeExtension().getCrossComponentPredictionEnabledFlag() && isChroma( compID ) && PU::isChromaIntraModeCrossCheckMode( pu ) && checkCrossCPrediction;
  const bool           ccUseRecoResi        = m_pcEncCfg->getUseReconBasedCrossCPredictionEstimate();


  //===== init availability pattern =====
  PelBuf sharedPredTS( m_pSharedPredTransformSkip[compID], area );
  if( default0Save1Load2 != 2 )
  {
    const bool bUseFilteredPredictions = IntraPrediction::useFilteredIntraRefSamples( compID, pu, true, tu );
    initIntraPatternChType( *tu.cu, area, bUseFilteredPredictions );

    //===== get prediction signal =====
    if( compID != COMPONENT_Y && PU::isLMCMode( uiChFinalMode ) )
    {
      {
        xGetLumaRecPixels( pu, area );
      }
      predIntraChromaLM( compID, piPred, pu, area, uiChFinalMode );
    }
    else
    {
      predIntraAng( compID, piPred, pu, bUseFilteredPredictions );
    }


    // save prediction
    if( default0Save1Load2 == 1 )
    {
      sharedPredTS.copyFrom( piPred );
    }
  }
  else
  {
    // load prediction
    piPred.copyFrom( sharedPredTS );
  }


  DTRACE( g_trace_ctx, D_PRED, "@(%4d,%4d) [%2dx%2d] IMode=%d\n", tu.lx(), tu.ly(), tu.lwidth(), tu.lheight(), uiChFinalMode );
  //DTRACE_PEL_BUF( D_PRED, piPred, tu, tu.cu->predMode, COMPONENT_Y );

  //===== get residual signal =====
  piResi.copyFrom( piOrg  );
  piResi.subtract( piPred );

  if (pps.getPpsRangeExtension().getCrossComponentPredictionEnabledFlag() && isLuma(compID))
  {
    piOrgResi.copyFrom (piResi);
  }

  if (bUseCrossCPrediction)
  {
    if (xCalcCrossComponentPredictionAlpha(tu, compID, ccUseRecoResi) == 0)
    {
      return;
    }
    CrossComponentPrediction::crossComponentPrediction(tu, compID, cs.getResiBuf(tu.Y()), piResi, piResi, false);
  }

  //===== transform and quantization =====
  //--- init rate estimation arrays for RDOQ ---
  //--- transform and quantization           ---
  TCoeff uiAbsSum = 0;

  const QpParam cQP(tu, compID);

#if RDOQ_CHROMA_LAMBDA
  m_pcTrQuant->selectLambda(compID);
#endif

Tung Nguyen's avatar
Tung Nguyen committed
1306
1307
1308
1309
1310
1311
1312
1313
#if JVET_M0464_UNI_MTS
  if( trModes )
  {
    m_pcTrQuant->transformNxN( tu, compID, cQP, trModes, CU::isIntra( *tu.cu ) ? m_pcEncCfg->getIntraMTSMaxCand() : m_pcEncCfg->getInterMTSMaxCand() );
    tu.mtsIdx = trModes->at(0).first;
  }
  m_pcTrQuant->transformNxN(tu, compID, cQP, uiAbsSum, m_CABACEstimator->getCtx(), loadTr);
#else
1314
  m_pcTrQuant->transformNxN(tu, compID, cQP, uiAbsSum, m_CABACEstimator->getCtx());
Tung Nguyen's avatar
Tung Nguyen committed
1315
#endif
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355


  DTRACE( g_trace_ctx, D_TU_ABS_SUM, "%d: comp=%d, abssum=%d\n", DTRACE_GET_COUNTER( g_trace_ctx, D_TU_ABS_SUM ), compID, uiAbsSum );


  //--- inverse transform ---
  if (uiAbsSum > 0)
  {
    m_pcTrQuant->invTransformNxN(tu, compID, piResi, cQP);
  }
  else
  {
    piResi.fill(0);
  }

  //===== reconstruction =====
  if (bUseCrossCPrediction)
  {
    CrossComponentPrediction::crossComponentPrediction(tu, compID, cs.getResiBuf(tu.Y()), piResi, piResi, true);
  }

  piReco.reconstruct(piPred, piResi, cs.slice->clpRng( compID ));

  //===== update distortion =====
#if WCG_EXT
  if( m_pcEncCfg->getLumaLevelToDeltaQPMapping().isEnabled() )
  {
    const CPelBuf orgLuma = cs.getOrgBuf( cs.area.blocks[COMPONENT_Y] );
    ruiDist += m_pcRdCost->getDistPart( piOrg, piReco, bitDepth, compID, DF_SSE_WTD, &orgLuma );
  }
  else
#endif
  {
    ruiDist += m_pcRdCost->getDistPart( piOrg, piReco, bitDepth, compID, DF_SSE );
  }
}

void IntraSearch::xRecurIntraCodingLumaQT( CodingStructure &cs, Partitioner &partitioner )
{
  const UnitArea &currArea = partitioner.currArea();
Tung Nguyen's avatar
Tung Nguyen committed
1356
#if !JVET_M0464_UNI_MTS
1357
  const CodingUnit &cu     = *cs.getCU(currArea.lumaPos(), partitioner.chType);
Tung Nguyen's avatar
Tung Nguyen committed
1358
1359
#endif
  uint32_t currDepth       = partitioner.currTrDepth;
1360
1361
1362
1363
  const PPS &pps           = *cs.pps;
  const bool keepResi      = pps.getPpsRangeExtension().getCrossComponentPredictionEnabledFlag() || KEEP_PRED_AND_RESI_SIGNALS;
  bool bCheckFull          = true;
  bool bCheckSplit         = false;
Karsten Suehring's avatar
Karsten Suehring committed
1364
1365
  bCheckFull               = !partitioner.canSplit( TU_MAX_TR_SPLIT, cs );
  bCheckSplit              = partitioner.canSplit( TU_MAX_TR_SPLIT, cs );
1366
1367
1368

  uint32_t    numSig           = 0;

Tung Nguyen's avatar
Tung Nguyen committed
1369
1370
1371
1372
1373
1374
#if JVET_M0464_UNI_MTS
  double     dSingleCost                        = MAX_DOUBLE;
  Distortion uiSingleDistLuma                   = 0;
  uint64_t   singleFracBits                     = 0;
  int        bestModeId[MAX_NUM_COMPONENT]      = { 0, 0, 0 };
#else
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
  bool    checkInitTrDepth = false, checkInitTrDepthTransformSkipWinner = false;

  double     dSingleCost                        = MAX_DOUBLE;
  Distortion uiSingleDistLuma                   = 0;
  uint64_t     singleFracBits                     = 0;
  bool       checkTransformSkip                 = pps.getUseTransformSkip();
  int        bestModeId[MAX_NUM_COMPONENT]      = {0, 0, 0};
  uint8_t      nNumTransformCands                 = cu.emtFlag ? 4 : 1; //4 is the number of transforms of emt
  bool       isAllIntra                         = m_pcEncCfg->getIntraPeriod() == 1;

  uint8_t numTransformIndexCands                  = nNumTransformCands;
Tung Nguyen's avatar
Tung Nguyen committed
1386
#endif
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409

  const TempCtx ctxStart  ( m_CtxCache, m_CABACEstimator->getCtx() );
  TempCtx       ctxBest   ( m_CtxCache );

  CodingStructure *csSplit = nullptr;
  CodingStructure *csFull  = nullptr;

  if( bCheckSplit )
  {
    csSplit = &cs;
  }
  else if( bCheckFull )
  {
    csFull = &cs;
  }

  if( bCheckFull )
  {
    csFull->cost = 0.0;

    TransformUnit &tu = csFull->addTU( CS::getArea( *csFull, currArea, partitioner.chType ), partitioner.chType );
    tu.depth = currDepth;

Tung Nguyen's avatar
Tung Nguyen committed
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
#if JVET_M0464_UNI_MTS
    const bool tsAllowed  = TU::isTSAllowed ( tu, COMPONENT_Y );
    const bool mtsAllowed = TU::isMTSAllowed( tu, COMPONENT_Y );
    uint8_t nNumTransformCands = 1 + ( tsAllowed ? 1 : 0 ) + ( mtsAllowed ? 4 : 0 ); // DCT + TS + 4 MTS = 6 tests
    std::vector<TrMode> trModes;
    trModes.push_back( TrMode( 0, true ) ); //DCT2
    if( tsAllowed )
    {
      trModes.push_back( TrMode( 1, true ) );
    }
    if( mtsAllowed )
    {
      for( int i = 2; i < 6; i++ )
      {
        trModes.push_back( TrMode( i, true) );
      }
    }

    CHECK( !tu.Y().valid(), "Invalid TU" );
#else
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
    checkTransformSkip &= TU::hasTransformSkipFlag( *tu.cs, tu.Y() );
    checkTransformSkip &= !cu.transQuantBypass;
    checkTransformSkip &= !cu.emtFlag;

    CHECK( !tu.Y().valid(), "Invalid TU" );

    //this prevents transformSkip from being checked because we already know it's not the best mode
    checkTransformSkip = ( checkInitTrDepth && !checkInitTrDepthTransformSkipWinner ) ? false : checkTransformSkip;


    CHECK( checkInitTrDepthTransformSkipWinner && !checkTransformSkip, "Transform Skip must be enabled if it was the winner in the previous call of xRecurIntraCodingLumaQT!" );
Tung Nguyen's avatar
Tung Nguyen committed
1441
#endif
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451

    CodingStructure &saveCS = *m_pSaveCS[0];

    TransformUnit *tmpTU = nullptr;

    Distortion singleDistTmpLuma = 0;
    uint64_t     singleTmpFracBits = 0;
    double     singleCostTmp     = 0;
    int        firstCheckId      = 0;

Tung Nguyen's avatar
Tung Nguyen committed
1452
1453
1454
1455
#if JVET_M0464_UNI_MTS
    int       lastCheckId        = trModes[nNumTransformCands-1].first;
    bool isNotOnlyOneMode        = nNumTransformCands != 1;
#else
1456
1457
1458
    //we add the EMT candidates to the loop. TransformSkip will still be the last one to be checked (when modeId == lastCheckId) as long as checkTransformSkip is true
    int        lastCheckId       = numTransformIndexCands - ( firstCheckId + 1 ) + ( int ) checkTransformSkip;
    bool isNotOnlyOneMode        = lastCheckId != firstCheckId && !checkInitTrDepthTransformSkipWinner;
Tung Nguyen's avatar
Tung Nguyen committed
1459
#endif
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469

    if( isNotOnlyOneMode )
    {
      saveCS.pcv     = cs.pcv;
      saveCS.picture = cs.picture;
      saveCS.area.repositionTo(cs.area);
      saveCS.clearTUs();
      tmpTU = &saveCS.addTU(currArea, partitioner.chType);
    }

Tung Nguyen's avatar
Tung Nguyen committed
1470
1471
1472
#if JVET_M0464_UNI_MTS
    bool    cbfDCT2  = true;
#else
1473
    bool cbfBestMode = false;
Tung Nguyen's avatar
Tung Nguyen committed
1474
#endif
1475

Tung Nguyen's avatar
Tung Nguyen committed
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
#if JVET_M0464_UNI_MTS
    for( int modeId = firstCheckId; modeId < nNumTransformCands; modeId++ )
    {
      if( !cbfDCT2 || ( m_pcEncCfg->getUseTransformSkipFast() && bestModeId[COMPONENT_Y] == 1 ) )
      {
        break;
      }
      if( !trModes[modeId].second )
      {
        continue;
      }
      tu.mtsIdx = trModes[modeId].first;
#else
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
    for( int modeId = firstCheckId; modeId <= lastCheckId; modeId++ )
    {
      if( checkInitTrDepthTransformSkipWinner )
      {
        //If this is a full RQT call and the winner of the first call (checkFirst=true) was transformSkip, then we skip the first iteration of the loop, since transform skip always comes at the end
        if( modeId == firstCheckId )
        {
          continue;
        }
      }

      uint8_t transformIndex = modeId;


      if( ( transformIndex < lastCheckId ) || ( ( transformIndex == lastCheckId ) && !checkTransformSkip ) ) //we avoid this if the mode is transformSkip
      {
        // Skip checking other transform candidates if zero CBF is encountered and it is the best transform so far
        if( m_pcEncCfg->getFastIntraEMT() && isAllIntra && transformIndex && !cbfBestMode )
        {
          continue;
        }
      }
Tung Nguyen's avatar
Tung Nguyen committed
1511
#endif
1512
1513
1514
1515
1516
1517
1518
1519
1520

      if ((modeId != firstCheckId) && isNotOnlyOneMode)
      {
        m_CABACEstimator->getCtx() = ctxStart;
      }

      int default0Save1Load2 = 0;
      singleDistTmpLuma = 0;

Tung Nguyen's avatar
Tung Nguyen committed
1521
1522
1523
#if JVET_M0464_UNI_MTS
      if( modeId == firstCheckId && nNumTransformCands > 1 )
#else
1524
      if (modeId == firstCheckId && modeId != lastCheckId && !checkInitTrDepthTransformSkipWinner )
Tung Nguyen's avatar
Tung Nguyen committed
1525
#endif
1526
1527
1528
1529
1530
1531
1532
      {
        default0Save1Load2 = 1;
      }
      else if (modeId != firstCheckId)
      {
        default0Save1Load2 = 2;
      }
Tung Nguyen's avatar
Tung Nguyen committed
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
#if JVET_M0464_UNI_MTS
      if( nNumTransformCands > 1 )
      {
        xIntraCodingTUBlock( tu, COMPONENT_Y, false, singleDistTmpLuma, default0Save1Load2, &numSig, modeId == 0 ? &trModes : nullptr, true );
        if( modeId == 0 )
        {
          for( int i = 0; i < nNumTransformCands; i++ )
          {
            if( trModes[i].second )
            {
              lastCheckId = trModes[i].first;
            }
          }
        }
      }
      else
      {
        xIntraCodingTUBlock( tu, COMPONENT_Y, false, singleDistTmpLuma, default0Save1Load2, &numSig );
      }
#else
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
      if (cu.emtFlag)
      {
        tu.emtIdx = transformIndex;
      }
      if( !checkTransformSkip )
      {
        tu.transformSkip[COMPONENT_Y] = false;
      }
      else
      {
        tu.transformSkip[COMPONENT_Y] = modeId == lastCheckId;
      }

      xIntraCodingTUBlock( tu, COMPONENT_Y, false, singleDistTmpLuma, default0Save1Load2, &numSig );
Tung Nguyen's avatar
Tung Nguyen committed
1567
#endif
1568
1569

      //----- determine rate and r-d cost -----
Tung Nguyen's avatar
Tung Nguyen committed
1570
1571
1572
#if JVET_M0464_UNI_MTS
      if( ( trModes[modeId].first != 0 && !TU::getCbfAtDepth( tu, COMPONENT_Y, currDepth ) ) )
#else
1573
      //the condition (transformIndex != DCT2_EMT) seems to be irrelevant, since DCT2_EMT=7 and the highest value of transformIndex is 4
1574
      if( ( modeId == lastCheckId && checkTransformSkip && !TU::getCbfAtDepth( tu, COMPONENT_Y, currDepth ) ) )
Tung Nguyen's avatar
Tung Nguyen committed
1575
#endif
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
      {
        //In order not to code TS flag when cbf is zero, the case for TS with cbf being zero is forbidden.
        singleCostTmp = MAX_DOUBLE;
      }
      else
      {
        singleTmpFracBits = xGetIntraFracBitsQT( *csFull, partitioner, true, false );
        singleCostTmp     = m_pcRdCost->calcRdCost( singleTmpFracBits, singleDistTmpLuma );
      }

      if (singleCostTmp < dSingleCost)
      {
        dSingleCost       = singleCostTmp;
        uiSingleDistLuma  = singleDistTmpLuma;
        singleFracBits    = singleTmpFracBits;

Tung Nguyen's avatar
Tung Nguyen committed
1592
1593
1594
1595
1596
1597
1598
#if JVET_M0464_UNI_MTS
        bestModeId[COMPONENT_Y] = trModes[modeId].first;
        if( trModes[modeId].first == 0 )
        {
          cbfDCT2  = TU::getCbfAtDepth( tu, COMPONENT_Y, currDepth );
        }
#else
1599
1600
        bestModeId[COMPONENT_Y] = modeId;
        cbfBestMode       = TU::getCbfAtDepth( tu, COMPONENT_Y, currDepth );
Tung Nguyen's avatar
Tung Nguyen committed
1601
#endif
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664

        if( bestModeId[COMPONENT_Y] != lastCheckId )
        {
#if KEEP_PRED_AND_RESI_SIGNALS
          saveCS.getPredBuf( tu.Y() ).copyFrom( csFull->getPredBuf( tu.Y() ) );
#endif
          saveCS.getRecoBuf( tu.Y() ).copyFrom( csFull->getRecoBuf( tu.Y() ) );

          if( keepResi )
          {
            saveCS.getResiBuf   ( tu.Y() ).copyFrom( csFull->getResiBuf   ( tu.Y() ) );
            saveCS.getOrgResiBuf( tu.Y() ).copyFrom( csFull->getOrgResiBuf( tu.Y() ) );
          }

          tmpTU->copyComponentFrom( tu, COMPONENT_Y );

          ctxBest = m_CABACEstimator->getCtx();
        }
      }
    }

    if( bestModeId[COMPONENT_Y] != lastCheckId )
    {
#if KEEP_PRED_AND_RESI_SIGNALS
      csFull->getPredBuf( tu.Y() ).copyFrom( saveCS.getPredBuf( tu.Y() ) );
#endif
      csFull->getRecoBuf( tu.Y() ).copyFrom( saveCS.getRecoBuf( tu.Y() ) );

      if( keepResi )
      {
        csFull->getResiBuf   ( tu.Y() ).copyFrom( saveCS.getResiBuf   ( tu.Y() ) );
        csFull->getOrgResiBuf( tu.Y() ).copyFrom( saveCS.getOrgResiBuf( tu.Y() ) );
      }

      tu.copyComponentFrom( *tmpTU, COMPONENT_Y );

      if( !bCheckSplit )
      {
        m_CABACEstimator->getCtx() = ctxBest;
      }
    }
    else if( bCheckSplit )
    {
      ctxBest = m_CABACEstimator->getCtx();
    }

    csFull->cost     += dSingleCost;
    csFull->dist     += uiSingleDistLuma;
    csFull->fracBits += singleFracBits;
  }

  if( bCheckSplit )
  {
    //----- store full entropy coding status, load original entropy coding status -----
    if( bCheckFull )
    {
      m_CABACEstimator->getCtx() = ctxStart;
    }
    //----- code splitted block -----
    csSplit->cost = 0;

    bool uiSplitCbfLuma  = false;
    bool splitIsSelected = true;
Karsten Suehring's avatar
Karsten Suehring committed
1665
    if( partitioner.canSplit( TU_MAX_TR_SPLIT, cs ) )
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
    {
      partitioner.splitCurrArea( TU_MAX_TR_SPLIT, cs );
    }

    do
    {
      xRecurIntraCodingLumaQT( *csSplit, partitioner );

      csSplit->setDecomp( partitioner.currArea().Y() );

      uiSplitCbfLuma |= TU::getCbfAtDepth( *csSplit->getTU( partitioner.currArea().lumaPos(), partitioner.chType ), COMPONENT_Y, partitioner.currTrDepth );



    } while( partitioner.nextPart( *csSplit ) );

    partitioner.exitCurrSplit();

    if( splitIsSelected )
    {
      for( auto &ptu : csSplit->tus )
      {
        if( currArea.Y().contains( ptu->Y() ) )
        {
          TU::setCbfAtDepth( *ptu, COMPONENT_Y, currDepth, uiSplitCbfLuma ? 1 : 0 );
        }
      }

      //----- restore context states -----
      m_CABACEstimator->getCtx() = ctxStart;

      //----- determine rate and r-d cost -----
      csSplit->fracBits = xGetIntraFracBitsQT(*csSplit, partitioner, true, false);

      //--- update cost ---
      csSplit->cost     = m_pcRdCost->calcRdCost(csSplit->fracBits, csSplit->dist);
    }
  }

  if( csFull || csSplit )
  {
    {
      // otherwise this would've happened in useSubStructure
      cs.picture->getRecoBuf( currArea.Y() ).copyFrom( cs.getRecoBuf( currArea.Y() ) );
    }

    cs.cost = m_pcRdCost->calcRdCost( cs.fracBits, cs.dist );
  }
}

ChromaCbfs IntraSearch::xRecurIntraChromaCodingQT(CodingStructure &cs, Partitioner& partitioner)
{
  UnitArea currArea                   = partitioner.currArea();
  const bool keepResi                 = cs.sps->getSpsNext().getUseLMChroma() || KEEP_PRED_AND_RESI_SIGNALS;
  if( !currArea.Cb().valid() ) return ChromaCbfs( false );


  TransformUnit &currTU               = *cs.getTU( currArea.chromaPos(), CHANNEL_TYPE_CHROMA );
  const PredictionUnit &pu            = *cs.getPU( currArea.chromaPos(), CHANNEL_TYPE_CHROMA );
Tung Nguyen's avatar
Tung Nguyen committed
1725
#if !JVET_M0464_UNI_MTS
1726
  const TransformUnit &currTULuma     = CS::isDualITree( cs ) ? *cs.picture->cs->getTU( currArea.lumaPos(), CHANNEL_TYPE_LUMA ) : currTU;
Tung Nguyen's avatar
Tung Nguyen committed
1727
#endif
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739

  uint32_t     currDepth                  = partitioner.currTrDepth;
  const PPS &pps                      = *cs.pps;
  ChromaCbfs cbfs                     ( false );

  if (currDepth == currTU.depth)
  {
    if (!currArea.Cb().valid() || !currArea.Cr().valid())
    {
      return cbfs;
    }

Tung Nguyen's avatar
Tung Nguyen committed
1740
#if !JVET_M0464_UNI_MTS
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
    bool checkTransformSkip = pps.getUseTransformSkip();
    checkTransformSkip &= TU::hasTransformSkipFlag( *currTU.cs, partitioner.currArea().Cb() );

    if( m_pcEncCfg->getUseTransformSkipFast() )
    {
      checkTransformSkip &= TU::hasTransformSkipFlag( *currTU.cs, partitioner.currArea().Y() );

      if( checkTransformSkip && cs.pcv->noChroma2x2 )
      {
        int nbLumaSkip = currTULuma.transformSkip[0] ? 1 : 0;

        {
          // the chroma blocks are co-located with the last luma block, so backwards references are needed
          nbLumaSkip += cs.getTU( currTULuma.Y().topLeft().offset( -1,  0 ), partitioner.chType )->transformSkip[0] ? 1 : 0;
          nbLumaSkip += cs.getTU( currTULuma.Y().topLeft().offset( -1, -1 ), partitioner.chType )->transformSkip[0] ? 1 : 0;
          nbLumaSkip += cs.getTU( currTULuma.Y().topLeft().offset(  0, -1 ), partitioner.chType )->transformSkip[0] ? 1 : 0;
        }

        checkTransformSkip &= ( nbLumaSkip > 0 );
      }
    }
Tung Nguyen's avatar
Tung Nguyen committed
1762
#endif
1763
1764
1765
1766
1767

    CodingStructure &saveCS = *m_pSaveCS[1];
    saveCS.pcv      = cs.pcv;
    saveCS.picture  = cs.picture;
    saveCS.area.repositionTo( cs.area );
1768
    saveCS.initStructData( MAX_INT, false, true );
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790

    TransformUnit &tmpTU = saveCS.addTU(currArea, partitioner.chType);


    cs.setDecomp(currArea.Cb(), true); // set in advance (required for Cb2/Cr2 in 4:2:2 video)

    const unsigned      numTBlocks  = ::getNumberValidTBlocks( *cs.pcv );

    for( uint32_t c = COMPONENT_Cb; c < numTBlocks; c++)
    {
      const ComponentID compID  = ComponentID(c);
      const CompArea&   area    = currTU.blocks[compID];

      double     dSingleCost    = MAX_DOUBLE;
      int        bestModeId     = 0;
      Distortion singleDistC    = 0;
      Distortion singleDistCTmp = 0;
      double     singleCostTmp  = 0;

      const bool checkCrossComponentPrediction = PU::isChromaIntraModeCrossCheckMode( pu ) && pps.getPpsRangeExtension().getCrossComponentPredictionEnabledFlag() && TU::getCbf( currTU, COMPONENT_Y );

      const int  crossCPredictionModesToTest = checkCrossComponentPrediction ? 2 : 1;
Tung Nguyen's avatar
Tung Nguyen committed
1791
1792
1793
#if JVET_M0464_UNI_MTS
      const int  totalModesToTest            = crossCPredictionModesToTest;
#else
1794
1795
      const int  transformSkipModesToTest    = checkTransformSkip ? 2 : 1;
      const int  totalModesToTest            = crossCPredictionModesToTest * transformSkipModesToTest;
Tung Nguyen's avatar
Tung Nguyen committed
1796
#endif
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
      const bool isOneMode                   = (totalModesToTest == 1);

      int currModeId = 0;
      int default0Save1Load2 = 0;

      TempCtx ctxStart  ( m_CtxCache );
      TempCtx ctxBest   ( m_CtxCache );

      if (!isOneMode)
      {
        ctxStart = m_CABACEstimator->getCtx();
      }

Tung Nguyen's avatar
Tung Nguyen committed
1810
#if !JVET_M0464_UNI_MTS
1811
      for (int transformSkipModeId = 0; transformSkipModeId < transformSkipModesToTest; transformSkipModeId++)
Tung Nguyen's avatar
Tung Nguyen committed
1812
#endif
1813
1814
1815
1816
      {
        for (int crossCPredictionModeId = 0; crossCPredictionModeId < crossCPredictionModesToTest; crossCPredictionModeId++)
        {
          currTU.compAlpha    [compID] = 0;
Tung Nguyen's avatar
Tung Nguyen committed
1817
#if !JVET_M0464_UNI_MTS
1818
          currTU.transformSkip[compID] = transformSkipModeId;
Tung Nguyen's avatar
Tung Nguyen committed
1819
#endif
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829

          currModeId++;

          const bool isFirstMode = (currModeId == 1);
          const bool isLastMode  = (currModeId == totalModesToTest); // currModeId is indexed from 1

          if (isOneMode)
          {
            default0Save1Load2 = 0;
          }
Tung Nguyen's avatar
Tung Nguyen committed
1830
1831
1832
#if JVET_M0464_UNI_MTS
          else if (!isOneMode && (crossCPredictionModeId == 0))
#else
1833
          else if (!isOneMode && (transformSkipModeId == 0) && (crossCPredictionModeId == 0))
Tung Nguyen's avatar
Tung Nguyen committed
1834
#endif
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
          {
            default0Save1Load2 = 1; //save prediction on first mode
          }
          else
          {
            default0Save1Load2 = 2; //load it on subsequent modes
          }

          if (!isFirstMode) // if not fi