IntraSearch.cpp 91.3 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
 * 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)
Taoran Lu's avatar
Taoran Lu committed
63
  , m_pcReshape     (nullptr)
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
  , 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
81
82
    const uint32_t uiNumLayersToAllocateSplit = 1;
    const uint32_t uiNumLayersToAllocateFull  = 1;
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
    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
98
        if( gp_sizeIdxInfo->isCuSize( gp_sizeIdxInfo->sizeFrom( width ) ) && gp_sizeIdxInfo->isCuSize( gp_sizeIdxInfo->sizeFrom( height ) ) )
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
        {
          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;
  }

Taoran Lu's avatar
Taoran Lu committed
153
  m_tmpStorageLCU.destroy();
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
  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
Taoran Lu's avatar
Taoran Lu committed
173
                       , EncReshape*   pcReshape
174
175
176
177
178
179
180
181
)
{
  CHECK(m_isInitialized, "Already initialized");
  m_pcEncCfg                     = pcEncCfg;
  m_pcTrQuant                    = pcTrQuant;
  m_pcRdCost                     = pcRdCost;
  m_CABACEstimator               = CABACEstimator;
  m_CtxCache                     = ctxCache;
Taoran Lu's avatar
Taoran Lu committed
182
  m_pcReshape                    = pcReshape;
183
184
185
186

  const ChromaFormat cform = pcEncCfg->getChromaFormatIdc();

  IntraPrediction::init( cform, pcEncCfg->getBitDepth( CHANNEL_TYPE_LUMA ) );
Taoran Lu's avatar
Taoran Lu committed
187
  m_tmpStorageLCU.create(UnitArea(cform, Area(0, 0, MAX_CU_SIZE, MAX_CU_SIZE)));
188
189
190
191
192
193
194
195
196

  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
197
198
  const uint32_t uiNumLayersToAllocateSplit = 1;
  const uint32_t uiNumLayersToAllocateFull  = 1;
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215

  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
216
      if(  gp_sizeIdxInfo->isCuSize( gp_sizeIdxInfo->sizeFrom( width ) ) && gp_sizeIdxInfo->isCuSize( gp_sizeIdxInfo->sizeFrom( height ) ) )
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
268
      {
        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
//////////////////////////////////////////////////////////////////////////

269
void IntraSearch::estIntraPredLumaQT( CodingUnit &cu, Partitioner &partitioner, const double bestCostSoFar )
270
271
272
{
  CodingStructure       &cs            = *cu.cs;
  const SPS             &sps           = *cs.sps;
Karsten Suehring's avatar
Karsten Suehring committed
273
  const uint32_t             uiWidthBit    = g_aucLog2[partitioner.currArea().lwidth() ];
274
275
276
277
278
279
280
281
282
  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() );
Frank Bossen's avatar
Frank Bossen committed
283
  const TempCtx ctxStartIntraMode(m_CtxCache, SubCtx(Ctx::IntraLumaMpmFlag, m_CABACEstimator->getCtx()));
Paul Keydel's avatar
bugfix    
Paul Keydel committed
284
285
  const TempCtx ctxStartMHIntraMode ( m_CtxCache, SubCtx( Ctx::MHIntraPredMode,        m_CABACEstimator->getCtx() ) );
  const TempCtx ctxStartMrlIdx      ( m_CtxCache, SubCtx( Ctx::MultiRefLineIdx,        m_CABACEstimator->getCtx() ) );
286
287
288
289
290
291
292

  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

293
294
295
296
297
298
299
300
  const int width   = partitioner.currArea().lwidth();
  const int height  = partitioner.currArea().lheight();
  int nOptionsForISP = NUM_INTRA_SUBPARTITIONS_MODES;
  double bestCurrentCost = bestCostSoFar;

  int ispOptions[NUM_INTRA_SUBPARTITIONS_MODES] = { 0 };
  if( nOptionsForISP > 1 )
  {
301
302
303
304
305
#if MAX_TB_SIZE_SIGNALLING
    auto splitsThatCanBeUsedForISP = CU::canUseISPSplit( width, height, cu.cs->sps->getMaxTbSize() );
#else
    auto splitsThatCanBeUsedForISP = CU::canUseISPSplit( width, height, MAX_TB_SIZEY );
#endif
306
307
308
309
310
311
312
313
314
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
    if( splitsThatCanBeUsedForISP == CAN_USE_VER_AND_HORL_SPLITS )
    {
      const CodingUnit* cuLeft  = cu.ispMode != NOT_INTRA_SUBPARTITIONS ? cs.getCU( cs.area.blocks[partitioner.chType].pos().offset( -1, 0 ), partitioner.chType ) : nullptr;
      const CodingUnit* cuAbove = cu.ispMode != NOT_INTRA_SUBPARTITIONS ? cs.getCU( cs.area.blocks[partitioner.chType].pos().offset( 0, -1 ), partitioner.chType ) : nullptr;
      bool ispHorIsFirstTest = CU::firstTestISPHorSplit( width, height, COMPONENT_Y, cuLeft, cuAbove );
      if( ispHorIsFirstTest )
      {
        ispOptions[1] = HOR_INTRA_SUBPARTITIONS;
        ispOptions[2] = VER_INTRA_SUBPARTITIONS;
      }
      else
      {
        ispOptions[1] = VER_INTRA_SUBPARTITIONS;
        ispOptions[2] = HOR_INTRA_SUBPARTITIONS;
      }
    }
    else if( splitsThatCanBeUsedForISP == HOR_INTRA_SUBPARTITIONS )
    {
      nOptionsForISP = 2;
      ispOptions[1] = HOR_INTRA_SUBPARTITIONS;
    }
    else if( splitsThatCanBeUsedForISP == VER_INTRA_SUBPARTITIONS )
    {
      nOptionsForISP = 2;
      ispOptions[1] = VER_INTRA_SUBPARTITIONS;
    }
    else
    {
      nOptionsForISP = 1;
    }
  }
  if( nOptionsForISP > 1 )
  {
    //variables for the full RD list without MRL modes
    m_rdModeListWithoutMrl      .clear();
    m_rdModeListWithoutMrlHor   .clear();
    m_rdModeListWithoutMrlVer   .clear();
    //variables with data from regular intra used to skip ISP splits
    m_intraModeDiagRatio        .clear();
    m_intraModeHorVerRatio      .clear();
    m_intraModeTestedNormalIntra.clear();
  }
348
349
350
351
352

  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;

353
354
355
  static_vector<int, FAST_UDI_MAX_RDMODE_NUM> extendRefList;
  static_vector<int, FAST_UDI_MAX_RDMODE_NUM>* nullList = NULL;

356
357
358
359
360
  auto &pu = *cu.firstPU;
  {
    CandHadList.clear();
    CandCostList.clear();
    uiHadModeList.clear();
361
    extendRefList.clear();
362
363
364
365
366
367
368
369

    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
370
    numModesForFullRD = g_aucIntraModeNumFast_UseMPM_2D[uiWidthBit - MIN_CU_LOG2][uiHeightBit - MIN_CU_LOG2];
371
372
373
374
375
376
377
378

#if INTRA_FULL_SEARCH
    numModesForFullRD = numModesAvailable;
#endif

    {
      // this should always be true
      CHECK( !pu.Y().valid(), "PU is not valid" );
Liang Zhao's avatar
Liang Zhao committed
379
#if ENABLE_JVET_L0283_MRL
380
381
      bool isFirstLineOfCtu = (((pu.block(COMPONENT_Y).y)&((pu.cs->sps)->getMaxCUWidth() - 1)) == 0);
      int numOfPassesExtendRef = (isFirstLineOfCtu ? 1 : MRL_NUM_REF_LINES);
Liang Zhao's avatar
Liang Zhao committed
382
#endif
383
      pu.multiRefIdx = 0;
384
385

      //===== init pattern for luma prediction =====
386
      initIntraPatternChType( cu, pu.Y(), true);
387
388
389
390
391
392
393
394
395
      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);

396
397
398
399
#if JVET_N0363_INTRA_COST_MOD
        DistParam distParamSad;
        DistParam distParamHad;
#else
400
401
402
        DistParam distParam;

        const bool bUseHadamard = cu.transQuantBypass == 0;
403
#endif
404

Taoran Lu's avatar
Taoran Lu committed
405
406
407
408
409
410
        if (cu.slice->getReshapeInfo().getUseSliceReshaper() && m_pcReshape->getCTUFlag())
        {
          CompArea      tmpArea(COMPONENT_Y, area.chromaFormat, Position(0, 0), area.size());
          PelBuf tmpOrg = m_tmpStorageLCU.getBuf(tmpArea);
          tmpOrg.copyFrom(piOrg);
          tmpOrg.rspSignal(m_pcReshape->getFwdLUT());
411
412
413
414
#if JVET_N0363_INTRA_COST_MOD
          m_pcRdCost->setDistParam(distParamSad, tmpOrg, piPred, sps.getBitDepth(CHANNEL_TYPE_LUMA), COMPONENT_Y, false); // Use SAD cost
          m_pcRdCost->setDistParam(distParamHad, tmpOrg, piPred, sps.getBitDepth(CHANNEL_TYPE_LUMA), COMPONENT_Y,  true); // Use HAD (SATD) cost
#else
Taoran Lu's avatar
Taoran Lu committed
415
          m_pcRdCost->setDistParam(distParam, tmpOrg, piPred, sps.getBitDepth(CHANNEL_TYPE_LUMA), COMPONENT_Y, bUseHadamard);
416
#endif
Taoran Lu's avatar
Taoran Lu committed
417
418
        }
        else
419
420
421
422
423
424
#if JVET_N0363_INTRA_COST_MOD
        {
          m_pcRdCost->setDistParam(distParamSad, piOrg, piPred, sps.getBitDepth(CHANNEL_TYPE_LUMA), COMPONENT_Y, false); // Use SAD cost
          m_pcRdCost->setDistParam(distParamHad, piOrg, piPred, sps.getBitDepth(CHANNEL_TYPE_LUMA), COMPONENT_Y,  true); // Use HAD (SATD) cost
        }
#else
425
        m_pcRdCost->setDistParam(distParam, piOrg, piPred, sps.getBitDepth(CHANNEL_TYPE_LUMA), COMPONENT_Y, bUseHadamard);
426
#endif
427

428
429
430
431
#if JVET_N0363_INTRA_COST_MOD
        distParamSad.applyWeight = false;
        distParamHad.applyWeight = false;
#else
432
        distParam.applyWeight = false;
433
#endif
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453

        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;

454
            initPredIntraParams(pu, pu.Y(), sps);
455
456
457
458
459
460
            if( useDPCMForFirstPassIntraEstimation( pu, uiMode ) )
            {
              encPredIntraDPCM( COMPONENT_Y, piOrg, piPred, uiMode );
            }
            else
            {
461
              predIntraAng( COMPONENT_Y, piPred, pu);
462
            }
463
464
465
466
467
#if JVET_N0363_INTRA_COST_MOD
            // Use the min between SAD and HAD as the cost criterion
            // SAD is scaled by 2 to align with the scaling of HAD
            uiSad += std::min(distParamSad.distFunc(distParamSad)*2, distParamHad.distFunc(distParamHad));
#else
468
469
            // use Hadamard transform here
            uiSad += distParam.distFunc(distParam);
470
#endif
471
472

            // NB xFracModeBitsIntra will not affect the mode for chroma that may have already been pre-estimated.
Frank Bossen's avatar
Frank Bossen committed
473
            m_CABACEstimator->getCtx() = SubCtx(Ctx::IntraLumaMpmFlag, ctxStartIntraMode);
Paul Keydel's avatar
bugfix    
Paul Keydel committed
474
475
            m_CABACEstimator->getCtx() = SubCtx( Ctx::MHIntraPredMode, ctxStartMHIntraMode );
            m_CABACEstimator->getCtx() = SubCtx( Ctx::MultiRefLineIdx, ctxStartMrlIdx );
476
477
478
479
480
481
482

            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 );

483
484
485
486
487
488
            updateCandList( uiMode, cost,  uiRdModeList, CandCostList
              , extendRefList, 0
              , numModesForFullRD + extraModes );
            updateCandList(uiMode, (double) uiSad, uiHadModeList, CandHadList
              , *nullList, -1
              , 3 + extraModes);
489
490
491
492
493
          }
        } // NSSTFlag

        // forget the extra modes
        uiRdModeList.resize( numModesForFullRD );
494
495
        CandCostList.resize(numModesForFullRD);
        extendRefList.resize(numModesForFullRD);
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
        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;

514
                initPredIntraParams(pu, pu.Y(), sps);
515
516
517
518
519
520
                if (useDPCMForFirstPassIntraEstimation(pu, mode))
                {
                  encPredIntraDPCM(COMPONENT_Y, piOrg, piPred, mode);
                }
                else
                {
521
                  predIntraAng(COMPONENT_Y, piPred, pu );
522
                }
523
524
525
526
527
528
                
#if JVET_N0363_INTRA_COST_MOD
                // Use the min between SAD and SATD as the cost criterion
                // SAD is scaled by 2 to align with the scaling of HAD
                Distortion sad = std::min(distParamSad.distFunc(distParamSad)*2, distParamHad.distFunc(distParamHad));
#else
529
530
                // use Hadamard transform here
                Distortion sad = distParam.distFunc(distParam);
531
#endif
532
533

                // NB xFracModeBitsIntra will not affect the mode for chroma that may have already been pre-estimated.
Frank Bossen's avatar
Frank Bossen committed
534
                m_CABACEstimator->getCtx() = SubCtx(Ctx::IntraLumaMpmFlag, ctxStartIntraMode);
Paul Keydel's avatar
bugfix    
Paul Keydel committed
535
536
                m_CABACEstimator->getCtx() = SubCtx( Ctx::MHIntraPredMode, ctxStartMHIntraMode );
                m_CABACEstimator->getCtx() = SubCtx( Ctx::MultiRefLineIdx, ctxStartMrlIdx );
537
538
539
540
541

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

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

542
543
544
545
546
547
                updateCandList(mode, cost, uiRdModeList, CandCostList
                  , extendRefList, 0
                  , numModesForFullRD);
                updateCandList(mode, (double)sad, uiHadModeList, CandHadList
                  , *nullList, -1
                  , 3);
548
549
550
551
552
553

                bSatdChecked[mode] = true;
              }
            }
          }
        }
554
555
556
557
558
559
        if( nOptionsForISP > 1 )
        {
          //we save the list with no mrl modes to keep only the Hadamard selected modes (no mpms)
          m_rdModeListWithoutMrl.resize( numModesForFullRD );
          std::copy_n( uiRdModeList.begin(), numModesForFullRD, m_rdModeListWithoutMrl.begin() );
        }
Liang Zhao's avatar
Liang Zhao committed
560
#if ENABLE_JVET_L0283_MRL
561
        pu.multiRefIdx = 1;
562
563
        const int  numMPMs = NUM_MOST_PROBABLE_MODES;
        unsigned  multiRefMPM [numMPMs];
564
565
566
567
568
569
570
        PU::getIntraMPMs(pu, multiRefMPM);
        for (int mRefNum = 1; mRefNum < numOfPassesExtendRef; mRefNum++)
        {
          int multiRefIdx = MULTI_REF_LINE_IDX[mRefNum];

          pu.multiRefIdx = multiRefIdx;
          {
571
            initIntraPatternChType(cu, pu.Y(), true);
572
          }
573
574
575
#if JVET_N0185_UNIFIED_MPM
          for (int x = 1; x < numMPMs; x++)
#else
576
          for (int x = 0; x < numMPMs; x++)
577
#endif
578
579
580
581
          {
            uint32_t mode = multiRefMPM[x];
            {
              pu.intraDir[0] = mode;
582
              initPredIntraParams(pu, pu.Y(), sps);
583
584
585
586
587
588
589

              if (useDPCMForFirstPassIntraEstimation(pu, mode))
              {
                encPredIntraDPCM(COMPONENT_Y, piOrg, piPred, mode);
              }
              else
              {
590
                predIntraAng(COMPONENT_Y, piPred, pu);
591
592
              }

593
594
595
596
597
#if JVET_N0363_INTRA_COST_MOD
              // Use the min between SAD and SATD as the cost criterion
              // SAD is scaled by 2 to align with the scaling of HAD
              Distortion sad = std::min(distParamSad.distFunc(distParamSad)*2, distParamHad.distFunc(distParamHad));
#else
598
599
              // use Hadamard transform here
              Distortion sad = distParam.distFunc(distParam);
600
#endif
601
602

              // NB xFracModeBitsIntra will not affect the mode for chroma that may have already been pre-estimated.
Frank Bossen's avatar
Frank Bossen committed
603
              m_CABACEstimator->getCtx() = SubCtx(Ctx::IntraLumaMpmFlag, ctxStartIntraMode);
Paul Keydel's avatar
bugfix    
Paul Keydel committed
604
605
              m_CABACEstimator->getCtx() = SubCtx( Ctx::MHIntraPredMode, ctxStartMHIntraMode );
              m_CABACEstimator->getCtx() = SubCtx( Ctx::MultiRefLineIdx, ctxStartMrlIdx );
606
607
608
609
610
611
612
613

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

              double cost = (double)sad + (double)fracModeBits * sqrtLambdaForFirstPass;
              updateCandList(mode, cost, uiRdModeList, CandCostList, extendRefList, multiRefIdx, numModesForFullRD);
            }
          }
        }
Liang Zhao's avatar
Liang Zhao committed
614
#endif
615
616
        CandCostList.resize(numModesForFullRD);
        extendRefList.resize(numModesForFullRD);
617
618
        if( m_pcEncCfg->getFastUDIUseMPMEnabled() )
        {
619
620
          const int numMPMs = NUM_MOST_PROBABLE_MODES;
          unsigned  uiPreds[numMPMs];
621

622
623
          pu.multiRefIdx = 0;

624
625
626
627
628
629
630
631
632
633
          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++ )
            {
634
              mostProbableModeIncluded |= (mostProbableMode == uiRdModeList[i] && extendRefList[i] == 0);
635
636
637
            }
            if( !mostProbableModeIncluded )
            {
638
              extendRefList.push_back(0);
639
640
641
642
              numModesForFullRD++;
              uiRdModeList.push_back( mostProbableMode );
            }
          }
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
          if( nOptionsForISP > 1 )
          {
            //we add the ISP MPMs to the list without mrl modes
            m_rdModeListWithoutMrlHor = m_rdModeListWithoutMrl;
            m_rdModeListWithoutMrlVer = m_rdModeListWithoutMrl;
            static_vector<uint32_t, FAST_UDI_MAX_RDMODE_NUM>* listPointer;
            for( int k = 1; k < nOptionsForISP; k++ )
            {
              cu.ispMode = ispOptions[k];
              listPointer = &( cu.ispMode == HOR_INTRA_SUBPARTITIONS ? m_rdModeListWithoutMrlHor : m_rdModeListWithoutMrlVer );
              const int numCandISP = PU::getIntraMPMs( pu, uiPreds );
              for( int j = 0; j < numCandISP; j++ )
              {
                bool mostProbableModeIncluded = false;
                int  mostProbableMode = uiPreds[j];

                for( int i = 0; i < listPointer->size(); i++ )
                {
                  mostProbableModeIncluded |= ( mostProbableMode == listPointer->at( i ) );
                }
                if( !mostProbableModeIncluded )
                {
                  listPointer->push_back( mostProbableMode );
                }
              }
            }
            cu.ispMode = NOT_INTRA_SUBPARTITIONS;
          }
671
672
673
674
675
676
677
678
679
680
681
        }
      }
      else
      {
        for( int i = 0; i < numModesForFullRD; i++ )
        {
          uiRdModeList.push_back( i );
        }
      }
    }

682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
    if( nOptionsForISP > 1 ) // we remove the non-MPMs from the ISP lists
    {
      static_vector< uint32_t, FAST_UDI_MAX_RDMODE_NUM > uiRdModeListCopyHor = m_rdModeListWithoutMrlHor;
      m_rdModeListWithoutMrlHor.clear();
      static_vector< uint32_t, FAST_UDI_MAX_RDMODE_NUM > uiRdModeListCopyVer = m_rdModeListWithoutMrlVer;
      m_rdModeListWithoutMrlVer.clear();
      static_vector< uint32_t, FAST_UDI_MAX_RDMODE_NUM > *listPointerCopy, *listPointer;
      for( int ispOptionIdx = 1; ispOptionIdx < nOptionsForISP; ispOptionIdx++ )
      {
        cu.ispMode = ispOptions[ispOptionIdx];
        //we get the mpm cand list
        const int numMPMs = NUM_MOST_PROBABLE_MODES;
        unsigned  uiPreds[numMPMs];

        pu.multiRefIdx = 0;

        PU::getIntraMPMs( pu, uiPreds );

        //we copy only the ISP MPMs
        listPointerCopy = &( cu.ispMode == HOR_INTRA_SUBPARTITIONS ? uiRdModeListCopyHor : uiRdModeListCopyVer );
        listPointer     = &( cu.ispMode == HOR_INTRA_SUBPARTITIONS ? m_rdModeListWithoutMrlHor : m_rdModeListWithoutMrlVer );
        for( int k = 0; k < listPointerCopy->size(); k++ )
        {
          for( int q = 0; q < numMPMs; q++ )
          {
            if( listPointerCopy->at( k ) == uiPreds[q] )
            {
              listPointer->push_back( listPointerCopy->at( k ) );
              break;
            }
          }
        }
      }
      cu.ispMode = NOT_INTRA_SUBPARTITIONS;
    }

718
719
720
721
722
723

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

    // after this point, don't use numModesForFullRD

    // PBINTRA fast
724
725
726
#if JVET_N0329_IBC_SEARCH_IMP
    if (m_pcEncCfg->getUsePbIntraFast() && !cs.slice->isIntra() && uiRdModeList.size() < numModesAvailable && !cs.slice->getDisableSATDForRD())
#else
Tung Nguyen's avatar
Tung Nguyen committed
727
    if( m_pcEncCfg->getUsePbIntraFast() && !cs.slice->isIntra() && uiRdModeList.size() < numModesAvailable )
728
#endif
729
730
731
732
    {
      if( CandHadList.size() < 3 || CandHadList[2] > cs.interHad * PBINTRA_RATIO )
      {
        uiRdModeList.resize( std::min<size_t>( uiRdModeList.size(), 2 ) );
733
        extendRefList.resize( std::min<size_t>( extendRefList.size(), 2 ) );
734
735
736
737
738
        if( nOptionsForISP > 1 )
        {
          m_rdModeListWithoutMrlHor.resize( std::min<size_t>( m_rdModeListWithoutMrlHor.size(), 2 ) );
          m_rdModeListWithoutMrlVer.resize( std::min<size_t>( m_rdModeListWithoutMrlVer.size(), 2 ) );
        }
739
740
741
742
      }
      if( CandHadList.size() < 2 || CandHadList[1] > cs.interHad * PBINTRA_RATIO )
      {
        uiRdModeList.resize( std::min<size_t>( uiRdModeList.size(), 1 ) );
743
        extendRefList.resize( std::min<size_t>( extendRefList.size(), 1 ) );
744
745
746
747
748
        if( nOptionsForISP > 1 )
        {
          m_rdModeListWithoutMrlHor.resize( std::min<size_t>( m_rdModeListWithoutMrlHor.size(), 1 ) );
          m_rdModeListWithoutMrlVer.resize( std::min<size_t>( m_rdModeListWithoutMrlVer.size(), 1 ) );
        }
749
750
751
752
753
754
755
      }
      if( CandHadList.size() < 1 || CandHadList[0] > cs.interHad * PBINTRA_RATIO )
      {
        cs.dist = std::numeric_limits<Distortion>::max();
        cs.interHad = 0;

        //===== reset context models =====
Frank Bossen's avatar
Frank Bossen committed
756
        m_CABACEstimator->getCtx() = SubCtx(Ctx::IntraLumaMpmFlag, ctxStartIntraMode);
Paul Keydel's avatar
bugfix    
Paul Keydel committed
757
758
        m_CABACEstimator->getCtx() = SubCtx( Ctx::MHIntraPredMode, ctxStartMHIntraMode );
        m_CABACEstimator->getCtx() = SubCtx( Ctx::MultiRefLineIdx, ctxStartMrlIdx );
759
760
761
762
763

        return;
      }
    }

764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
    if ( nOptionsForISP > 1 )
    {
      //we create a single full RD list that includes all intra modes using regular intra, MRL and ISP
      auto* firstIspList  = ispOptions[1] == HOR_INTRA_SUBPARTITIONS ? &m_rdModeListWithoutMrlHor : &m_rdModeListWithoutMrlVer;
      auto* secondIspList = ispOptions[1] == HOR_INTRA_SUBPARTITIONS ? &m_rdModeListWithoutMrlVer : &m_rdModeListWithoutMrlHor;

      if ( m_pcEncCfg->getUseFastISP() )
      {
        // find the first non-MRL mode
        size_t indexFirstMode = std::find( extendRefList.begin(), extendRefList.end(), 0 ) - extendRefList.begin();
        // if not found, just take the last mode
        if( indexFirstMode >= extendRefList.size() ) indexFirstMode = extendRefList.size() - 1;
        // move the mode indicated by indexFirstMode to the beginning
        for( int idx = ((int)indexFirstMode) - 1; idx >= 0; idx-- )
        {
          std::swap( extendRefList[idx], extendRefList[idx + 1] );
          std::swap( uiRdModeList [idx], uiRdModeList [idx + 1] );
        }
        //insert all ISP modes after the first non-mrl mode
        uiRdModeList.insert( uiRdModeList.begin() + 1, secondIspList->begin(), secondIspList->end() );
        uiRdModeList.insert( uiRdModeList.begin() + 1, firstIspList->begin() , firstIspList->end()  );

786
787
        extendRefList.insert( extendRefList.begin() + 1, secondIspList->size(), MRL_NUM_REF_LINES + ispOptions[2] );
        extendRefList.insert( extendRefList.begin() + 1, firstIspList->size() , MRL_NUM_REF_LINES + ispOptions[1] );
788
789
790
791
792
793
794
795
796
797
798
799
800
      }
      else
      {
        //insert all ISP modes at the end of the current list
        uiRdModeList.insert( uiRdModeList.end(), secondIspList->begin(), secondIspList->end() );
        uiRdModeList.insert( uiRdModeList.end(), firstIspList->begin() , firstIspList->end()  );

        extendRefList.insert( extendRefList.end(), secondIspList->size(), MRL_NUM_REF_LINES + ispOptions[2] );
        extendRefList.insert( extendRefList.end(), firstIspList->size() , MRL_NUM_REF_LINES + ispOptions[1] );
      }
    }
    CHECKD(uiRdModeList.size() != extendRefList.size(),"uiRdModeList and extendRefList do not have the same size!");

801
802
    //===== check modes (using r-d costs) =====
    uint32_t       uiBestPUMode  = 0;
803
    int            bestExtendRef = 0;
804
805
806
807
808
809
810
811
812
813
814

    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();
815
816
817
818
    PartSplit intraSubPartitionsProcOrder = TU_NO_ISP;
    int       bestNormalIntraModeIndex    = -1;
    uint8_t   bestIspOption               = NOT_INTRA_SUBPARTITIONS;
    TUIntraSubPartitioner subTuPartitioner( partitioner );
819
820
821
822
823
824
825
826
    bool      ispHorAllZeroCbfs = false, ispVerAllZeroCbfs = false;

    for (uint32_t uiMode = 0; uiMode < numModesForFullRD; uiMode++)
    {
      // set luma prediction mode
      uint32_t uiOrgMode = uiRdModeList[uiMode];

      cu.ispMode = extendRefList[uiMode] > MRL_NUM_REF_LINES ? extendRefList[uiMode] - MRL_NUM_REF_LINES : NOT_INTRA_SUBPARTITIONS;
827
828
829
830
831
832
833
834
        pu.intraDir[0] = uiOrgMode;

        int multiRefIdx = 0;
        pu.multiRefIdx = multiRefIdx;
        if( cu.ispMode )
        {
          intraSubPartitionsProcOrder = CU::getISPType( cu, COMPONENT_Y );
          bool tuIsDividedInRows = CU::divideTuInRows( cu );
835
836
837
838
          if ( ( tuIsDividedInRows && ispHorAllZeroCbfs ) || ( !tuIsDividedInRows && ispVerAllZeroCbfs ) )
          {
            continue;
          }
839
840
841
842
          if( m_intraModeDiagRatio.at( bestNormalIntraModeIndex ) > 1.25 )
          {
            continue;
          }
843
          if( ( m_intraModeHorVerRatio.at( bestNormalIntraModeIndex ) > 1.25 && tuIsDividedInRows ) || ( m_intraModeHorVerRatio.at( bestNormalIntraModeIndex ) < 0.8 && !tuIsDividedInRows ) )
844
          {
845
            continue;
846
847
848
849
850
851
          }
        }
        else
        {
          multiRefIdx = extendRefList[uiMode];
          pu.multiRefIdx = multiRefIdx;
852
#if !JVET_N0185_UNIFIED_MPM
853
          CHECK( pu.multiRefIdx && ( pu.intraDir[0] == DC_IDX || pu.intraDir[0] == PLANAR_IDX ), "ERL" );
854
855
856
#else
          CHECK( pu.multiRefIdx && (pu.intraDir[0] == PLANAR_IDX), "ERL" );
#endif
857
        }
858
859
860
861
862
863
864
865


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

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

866
867
868
869
870
871
      if( cu.ispMode )
      {
        xRecurIntraCodingLumaQT( *csTemp, subTuPartitioner, bestCurrentCost, 0, intraSubPartitionsProcOrder );
      }
      else
      {
872
        xRecurIntraCodingLumaQT( *csTemp, partitioner, bestIspOption ? bestCurrentCost : MAX_DOUBLE, -1, TU_NO_ISP, bestIspOption );
873
874
875
876
      }

      if( cu.ispMode && !csTemp->cus[0]->firstTU->cbf[COMPONENT_Y] )
      {
877
878
879
880
881
882
883
884
        if ( cu.ispMode == HOR_INTRA_SUBPARTITIONS )
        {
          ispHorAllZeroCbfs |= ( m_pcEncCfg->getUseFastISP() && csTemp->tus[0]->lheight() > 2 && csTemp->cost >= bestCurrentCost );
        }
        else
        {
          ispVerAllZeroCbfs |= ( m_pcEncCfg->getUseFastISP() && csTemp->tus[0]->lwidth() > 2 && csTemp->cost >= bestCurrentCost );
        }
885
        csTemp->cost = MAX_DOUBLE;
Nan Hu's avatar
M0428    
Nan Hu committed
886
        csTemp->costDbOffset = 0;
887
888
      }

889
890
891
892
893
894
895
896
897
898


      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;
899
        bestExtendRef = multiRefIdx;
900
901
902
903
904
905
906
907
908
        bestIspOption = cu.ispMode;
        if( csBest->cost < bestCurrentCost )
        {
          bestCurrentCost = csBest->cost;
        }
        if( !cu.ispMode )
        {
          bestNormalIntraModeIndex = uiMode;
        }
909
910
911
912
      }

      csTemp->releaseIntermediateData();
    } // Mode loop
913
    cu.ispMode = bestIspOption;
914

Taoran Lu's avatar
Taoran Lu committed
915
    cs.useSubStructure(*csBest, partitioner.chType, pu.singleChan(CHANNEL_TYPE_LUMA), true, true, keepResi, keepResi);
916
917
918
    csBest->releaseIntermediateData();
    //=== update PU data ====
    pu.intraDir[0] = uiBestPUMode;
919
    pu.multiRefIdx = bestExtendRef;
920
921
922
923
924
925
  }

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

926
void IntraSearch::estIntraPredChromaQT( CodingUnit &cu, Partitioner &partitioner, const double maxCostAllowed )
927
928
929
930
931
932
933
934
{
  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 );

935
936
937
938
939
  double    bestCostSoFar = maxCostAllowed;
  bool      lumaUsesISP   = !CS::isDualITree( *cu.cs ) && cu.ispMode;
  PartSplit ispType       = lumaUsesISP ? CU::getISPType( cu, COMPONENT_Y ) : TU_NO_ISP;
  CHECK( cu.ispMode && bestCostSoFar < 0, "bestCostSoFar must be positive!" );

940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
  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();

963
964
965
966
967
968
      if( !CS::isDualITree( cs ) && cu.ispMode )
      {
        saveCS.clearCUs();
        saveCS.clearPUs();
      }

969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
      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;

988
989
990
991
992
993
994
995
      if( lumaUsesISP )
      {
        CodingUnit& auxCU = saveCS.addCU( cu, partitioner.chType );
        auxCU.ispMode = cu.ispMode;
        saveCS.sps = cu.cs->sps;
        saveCS.addPU( *cu.firstPU, partitioner.chType );
      }

996
997
998
999
1000

      // 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
For faster browsing, not all history is shown. View entire blame