source: 3DVCSoftware/branches/HTM-3.0-LG/source/Lib/TLibDecoder/TDecSlice.cpp @ 62

Last change on this file since 62 was 56, checked in by hschwarz, 14 years ago

updated trunk (move to HM6.1)
  • Property svn:eol-style set to native
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1/* The copyright in this software is being made available under the BSD
2 * License, included below. This software may be subject to other third party
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4 * granted under this license. 
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33
34/** \file     TDecSlice.cpp
35    \brief    slice decoder class
36*/
37
38#include "TDecSlice.h"
39
40//! \ingroup TLibDecoder
41//! \{
42
43//////////////////////////////////////////////////////////////////////
44// Construction/Destruction
45//////////////////////////////////////////////////////////////////////
46
47TDecSlice::TDecSlice()
48{
49  m_pcBufferSbacDecoders = NULL;
50  m_pcBufferBinCABACs    = NULL;
51  m_pcBufferLowLatSbacDecoders = NULL;
52  m_pcBufferLowLatBinCABACs    = NULL;
53}
54
55TDecSlice::~TDecSlice()
56{
57}
58
59Void TDecSlice::create( TComSlice* pcSlice, Int iWidth, Int iHeight, UInt uiMaxWidth, UInt uiMaxHeight, UInt uiMaxDepth )
60{
61}
62
63Void TDecSlice::destroy()
64{
65  if ( m_pcBufferSbacDecoders )
66  {
67    delete[] m_pcBufferSbacDecoders;
68    m_pcBufferSbacDecoders = NULL;
69  }
70  if ( m_pcBufferBinCABACs )
71  {
72    delete[] m_pcBufferBinCABACs;
73    m_pcBufferBinCABACs = NULL;
74  }
75  if ( m_pcBufferLowLatSbacDecoders )
76  {
77    delete[] m_pcBufferLowLatSbacDecoders;
78    m_pcBufferLowLatSbacDecoders = NULL;
79  }
80  if ( m_pcBufferLowLatBinCABACs )
81  {
82    delete[] m_pcBufferLowLatBinCABACs;
83    m_pcBufferLowLatBinCABACs = NULL;
84  }
85}
86
87Void TDecSlice::init(TDecEntropy* pcEntropyDecoder, TDecCu* pcCuDecoder)
88{
89  m_pcEntropyDecoder  = pcEntropyDecoder;
90  m_pcCuDecoder       = pcCuDecoder;
91}
92
93Void TDecSlice::decompressSlice(TComInputBitstream* pcBitstream, TComInputBitstream** ppcSubstreams, TComPic*& rpcPic, TDecSbac* pcSbacDecoder, TDecSbac* pcSbacDecoders)
94{
95  TComDataCU* pcCU;
96  UInt        uiIsLast = 0;
97  Int   iStartCUEncOrder = max(rpcPic->getSlice(rpcPic->getCurrSliceIdx())->getSliceCurStartCUAddr()/rpcPic->getNumPartInCU(), rpcPic->getSlice(rpcPic->getCurrSliceIdx())->getEntropySliceCurStartCUAddr()/rpcPic->getNumPartInCU());
98  Int   iStartCUAddr = rpcPic->getPicSym()->getCUOrderMap(iStartCUEncOrder);
99
100  // decoder don't need prediction & residual frame buffer
101  rpcPic->setPicYuvPred( 0 );
102  rpcPic->setPicYuvResi( 0 );
103 
104#if ENC_DEC_TRACE
105  g_bJustDoIt = g_bEncDecTraceEnable;
106#endif
107  DTRACE_CABAC_VL( g_nSymbolCounter++ );
108  DTRACE_CABAC_T( "\tPOC: " );
109  DTRACE_CABAC_V( rpcPic->getPOC() );
110  DTRACE_CABAC_T( "\n" );
111
112#if ENC_DEC_TRACE
113  g_bJustDoIt = g_bEncDecTraceDisable;
114#endif
115
116  UInt uiTilesAcross   = rpcPic->getPicSym()->getNumColumnsMinus1()+1;
117  TComSlice*  pcSlice = rpcPic->getSlice(rpcPic->getCurrSliceIdx());
118  UInt iSymbolMode    = pcSlice->getPPS()->getEntropyCodingMode();
119  Int  iNumSubstreams = pcSlice->getPPS()->getNumSubstreams();
120
121  if( iSymbolMode )
122  {
123    m_pcBufferSbacDecoders = new TDecSbac    [uiTilesAcross]; 
124    m_pcBufferBinCABACs    = new TDecBinCABAC[uiTilesAcross];
125    for (UInt ui = 0; ui < uiTilesAcross; ui++)
126    {
127      m_pcBufferSbacDecoders[ui].init(&m_pcBufferBinCABACs[ui]);
128    }
129    //save init. state
130    for (UInt ui = 0; ui < uiTilesAcross; ui++)
131    {
132      m_pcBufferSbacDecoders[ui].load(pcSbacDecoder);
133    }
134  } 
135  if( iSymbolMode )
136  {
137    m_pcBufferLowLatSbacDecoders = new TDecSbac    [uiTilesAcross]; 
138    m_pcBufferLowLatBinCABACs    = new TDecBinCABAC[uiTilesAcross];
139    for (UInt ui = 0; ui < uiTilesAcross; ui++)
140      m_pcBufferLowLatSbacDecoders[ui].init(&m_pcBufferLowLatBinCABACs[ui]);
141    //save init. state
142    for (UInt ui = 0; ui < uiTilesAcross; ui++)
143      m_pcBufferLowLatSbacDecoders[ui].load(pcSbacDecoder);
144  }
145
146  UInt uiWidthInLCUs  = rpcPic->getPicSym()->getFrameWidthInCU();
147  //UInt uiHeightInLCUs = rpcPic->getPicSym()->getFrameHeightInCU();
148  UInt uiCol=0, uiLin=0, uiSubStrm=0;
149
150#if !REMOVE_TILE_DEPENDENCE
151  Int iBreakDep;
152#endif
153  UInt uiTileCol;
154  UInt uiTileStartLCU;
155  UInt uiTileLCUX;
156  UInt uiTileLCUY;
157  UInt uiTileWidth;
158  UInt uiTileHeight;
159  Int iNumSubstreamsPerTile = 1; // if independent.
160
161  for( Int iCUAddr = iStartCUAddr; !uiIsLast && iCUAddr < rpcPic->getNumCUsInFrame(); iCUAddr = rpcPic->getPicSym()->xCalculateNxtCUAddr(iCUAddr) )
162  {
163    pcCU = rpcPic->getCU( iCUAddr );
164    pcCU->initCU( rpcPic, iCUAddr );
165#if !REMOVE_TILE_DEPENDENCE
166    iBreakDep = rpcPic->getPicSym()->getTileBoundaryIndependenceIdr();
167#endif
168    uiTileCol = rpcPic->getPicSym()->getTileIdxMap(iCUAddr) % (rpcPic->getPicSym()->getNumColumnsMinus1()+1); // what column of tiles are we in?
169    uiTileStartLCU = rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getFirstCUAddr();
170    uiTileLCUX = uiTileStartLCU % uiWidthInLCUs;
171    uiTileLCUY = uiTileStartLCU / uiWidthInLCUs;
172    uiTileWidth = rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getTileWidth();
173    uiTileHeight = rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getTileHeight();
174    uiCol     = iCUAddr % uiWidthInLCUs;
175    uiLin     = iCUAddr / uiWidthInLCUs;
176    // inherit from TR if necessary, select substream to use.
177#if WPP_SIMPLIFICATION
178    if( iSymbolMode && pcSlice->getPPS()->getNumSubstreams() > 1 )
179#else
180    if( iSymbolMode && pcSlice->getPPS()->getEntropyCodingSynchro() )
181#endif
182    {
183#if !REMOVE_TILE_DEPENDENCE
184#if WPP_SIMPLIFICATION
185      if (iBreakDep && pcSlice->getPPS()->getNumSubstreams() > 1)
186#else
187      if (iBreakDep && pcSlice->getPPS()->getEntropyCodingSynchro())
188#endif
189#else
190#if WPP_SIMPLIFICATION
191      if (pcSlice->getPPS()->getNumSubstreams() > 1)
192#else
193      if (pcSlice->getPPS()->getEntropyCodingSynchro())
194#endif
195#endif
196      {
197        // independent tiles => substreams are "per tile".  iNumSubstreams has already been multiplied.
198        iNumSubstreamsPerTile = iNumSubstreams/rpcPic->getPicSym()->getNumTiles();
199        uiSubStrm = rpcPic->getPicSym()->getTileIdxMap(iCUAddr)*iNumSubstreamsPerTile
200                      + uiLin%iNumSubstreamsPerTile;
201      }
202      else
203      {
204        // dependent tiles => substreams are "per frame".
205        uiSubStrm = uiLin % iNumSubstreams;
206      }
207      m_pcEntropyDecoder->setBitstream( ppcSubstreams[uiSubStrm] );
208      // Synchronize cabac probabilities with upper-right LCU if it's available and we're at the start of a line.
209#if WPP_SIMPLIFICATION
210      if (pcSlice->getPPS()->getNumSubstreams() > 1 && uiCol == uiTileLCUX)
211#else
212      if (pcSlice->getPPS()->getEntropyCodingSynchro() && uiCol == uiTileLCUX)
213#endif
214      {
215        // We'll sync if the TR is available.
216        TComDataCU *pcCUUp = pcCU->getCUAbove();
217        UInt uiWidthInCU = rpcPic->getFrameWidthInCU();
218        TComDataCU *pcCUTR = NULL;
219#if WPP_SIMPLIFICATION
220        if ( pcCUUp && ((iCUAddr%uiWidthInCU+1) < uiWidthInCU)  )
221        {
222          pcCUTR = rpcPic->getCU( iCUAddr - uiWidthInCU + 1 );
223        }
224#else
225        if ( pcCUUp && ((iCUAddr%uiWidthInCU+pcSlice->getPPS()->getEntropyCodingSynchro()) < uiWidthInCU)  )
226        {
227          pcCUTR = rpcPic->getCU( iCUAddr - uiWidthInCU + pcSlice->getPPS()->getEntropyCodingSynchro() );
228        }
229#endif
230        UInt uiMaxParts = 1<<(pcSlice->getSPS()->getMaxCUDepth()<<1);
231
232        if ( (true/*bEnforceSliceRestriction*/ &&
233             ((pcCUTR==NULL) || (pcCUTR->getSlice()==NULL) || 
234             ((pcCUTR->getSCUAddr()+uiMaxParts-1) < pcSlice->getSliceCurStartCUAddr()) ||
235#if !REMOVE_TILE_DEPENDENCE
236             (rpcPic->getPicSym()->getTileBoundaryIndependenceIdr() && (rpcPic->getPicSym()->getTileIdxMap( pcCUTR->getAddr() ) != rpcPic->getPicSym()->getTileIdxMap(iCUAddr)))
237#else
238             ((rpcPic->getPicSym()->getTileIdxMap( pcCUTR->getAddr() ) != rpcPic->getPicSym()->getTileIdxMap(iCUAddr)))
239#endif
240             ))||
241             (true/*bEnforceEntropySliceRestriction*/ &&
242             ((pcCUTR==NULL) || (pcCUTR->getSlice()==NULL) || 
243             ((pcCUTR->getSCUAddr()+uiMaxParts-1) < pcSlice->getEntropySliceCurStartCUAddr()) ||
244#if !REMOVE_TILE_DEPENDENCE
245             (rpcPic->getPicSym()->getTileBoundaryIndependenceIdr() && (rpcPic->getPicSym()->getTileIdxMap( pcCUTR->getAddr() ) != rpcPic->getPicSym()->getTileIdxMap(iCUAddr)))
246#else
247             ((rpcPic->getPicSym()->getTileIdxMap( pcCUTR->getAddr() ) != rpcPic->getPicSym()->getTileIdxMap(iCUAddr)))
248#endif
249             ))
250           )
251        {
252          // TR not available.
253        }
254        else
255        {
256          // TR is available, we use it.
257            pcSbacDecoders[uiSubStrm].loadContexts( &m_pcBufferSbacDecoders[uiTileCol] );
258        }
259      }
260      pcSbacDecoder->load(&pcSbacDecoders[uiSubStrm]);  //this load is used to simplify the code (avoid to change all the call to pcSbacDecoders)
261    }
262#if WPP_SIMPLIFICATION
263    else if ( iSymbolMode && pcSlice->getPPS()->getNumSubstreams() <= 1 )
264#else
265    else if ( iSymbolMode && !pcSlice->getPPS()->getEntropyCodingSynchro() )
266#endif
267    {
268      // Set variables to appropriate values to avoid later code change.
269      iNumSubstreamsPerTile = 1;
270    }
271
272    if ( (iCUAddr == rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getFirstCUAddr()) && // 1st in tile.
273         (iCUAddr!=0) && (iCUAddr!=rpcPic->getPicSym()->getPicSCUAddr(rpcPic->getSlice(rpcPic->getCurrSliceIdx())->getSliceCurStartCUAddr())/rpcPic->getNumPartInCU())) // !1st in frame && !1st in slice
274    {
275#if WPP_SIMPLIFICATION
276      if (pcSlice->getPPS()->getNumSubstreams() > 1)
277#else
278      if (pcSlice->getPPS()->getEntropyCodingSynchro())
279#endif
280      {
281        // We're crossing into another tile, tiles are independent.
282        // When tiles are independent, we have "substreams per tile".  Each substream has already been terminated, and we no longer
283        // have to perform it here.
284        // For TILES_DECODER, there can be a header at the start of the 1st substream in a tile.  These are read when the substreams
285        // are extracted, not here.
286      }
287      else
288      {
289#if CABAC_INIT_FLAG
290        SliceType sliceType  = pcSlice->getSliceType();
291        if (pcSlice->getCabacInitFlag())
292        {
293          switch (sliceType)
294          {
295          case P_SLICE:           // change initialization table to B_SLICE intialization
296            sliceType = B_SLICE; 
297            break;
298          case B_SLICE:           // change initialization table to P_SLICE intialization
299            sliceType = P_SLICE; 
300            break;
301          default     :           // should not occur
302            assert(0);
303          }
304        }
305        m_pcEntropyDecoder->updateContextTables( sliceType, pcSlice->getSliceQp() );
306#else
307        m_pcEntropyDecoder->updateContextTables( pcSlice->getSliceType(), pcSlice->getSliceQp() );
308#endif
309      }
310     
311      Bool bTileMarkerFoundFlag = false;
312      TComInputBitstream *pcTmpPtr;
313      pcTmpPtr = ppcSubstreams[uiSubStrm]; // for CABAC
314
315      for (UInt uiIdx=0; uiIdx<pcTmpPtr->getTileMarkerLocationCount(); uiIdx++)
316      {
317        if ( pcTmpPtr->getByteLocation() == (pcTmpPtr->getTileMarkerLocation( uiIdx )+2) )
318        {
319          bTileMarkerFoundFlag = true;
320          break;
321        }
322      }
323
324      if (bTileMarkerFoundFlag)
325      {
326        UInt uiTileIdx;
327        // Read tile index
328        m_pcEntropyDecoder->readTileMarker( uiTileIdx, rpcPic->getPicSym()->getBitsUsedByTileIdx() );
329      }
330    }
331
332#if !REMOVE_TILE_DEPENDENCE
333    if ( (rpcPic->getPicSym()->getTileBoundaryIndependenceIdr()==0) && (rpcPic->getPicSym()->getNumColumnsMinus1()!=0) )
334    {   
335      // Synchronize cabac probabilities with LCU among Tiles
336      if( (uiTileLCUX != 0) &&
337          (iCUAddr == rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getFirstCUAddr()) )
338      {       
339        TComDataCU *pcCULeft = pcCU->getCULeft();
340        UInt uiMaxParts = 1<<(pcSlice->getSPS()->getMaxCUDepth()<<1);
341
342        if ( (true/*bEnforceSliceRestriction*/ &&
343              ((pcCULeft==NULL) || (pcCULeft->getSlice()==NULL) || 
344               ((pcCULeft->getSCUAddr()+uiMaxParts-1) < pcSlice->getSliceCurStartCUAddr()) 
345              )
346             )||
347             (true/*bEnforceEntropySliceRestriction*/ &&
348              ((pcCULeft==NULL) || (pcCULeft->getSlice()==NULL) || 
349               ((pcCULeft->getSCUAddr()+uiMaxParts-1) < pcSlice->getEntropySliceCurStartCUAddr())
350              )
351             )
352           )
353        {
354          // Left not available.
355        }
356        else
357        {
358          // Left is available, we use it.
359          pcSbacDecoders[uiSubStrm].loadContexts( &m_pcBufferLowLatSbacDecoders[uiTileCol-1] );
360          pcSbacDecoder->loadContexts(&pcSbacDecoders[uiSubStrm]);  //this load is used to simplify the code (avoid to change all the call to pcSbacDecoders)
361        }
362      }
363    }
364#endif
365
366
367#if ENC_DEC_TRACE
368    g_bJustDoIt = g_bEncDecTraceEnable;
369#endif
370#if SAO_UNIT_INTERLEAVING
371    if ( pcSlice->getSPS()->getUseSAO() && pcSlice->getSaoInterleavingFlag() && pcSlice->getSaoEnabledFlag() )
372    {
373      pcSlice->getAPS()->getSaoParam()->bSaoFlag[0] = pcSlice->getSaoEnabledFlag();
374      if (iCUAddr == iStartCUAddr)
375      {
376        pcSlice->getAPS()->getSaoParam()->bSaoFlag[1] = pcSlice->getSaoEnabledFlagCb();
377        pcSlice->getAPS()->getSaoParam()->bSaoFlag[2] = pcSlice->getSaoEnabledFlagCr();
378      }
379      Int numCuInWidth     = pcSlice->getAPS()->getSaoParam()->numCuInWidth;
380      Int cuAddrInSlice = iCUAddr - pcSlice->getSliceCurStartCUAddr()/rpcPic->getNumPartInCU();
381      Int cuAddrUpInSlice  = cuAddrInSlice - numCuInWidth;
382      Int rx = iCUAddr % numCuInWidth;
383      Int ry = iCUAddr / numCuInWidth;
384      pcSbacDecoder->parseSaoOneLcuInterleaving(rx, ry, pcSlice->getAPS()->getSaoParam(),pcCU, cuAddrInSlice, cuAddrUpInSlice, pcSlice->getSPS()->getLFCrossSliceBoundaryFlag() );
385    }
386#endif
387
388    m_pcCuDecoder->decodeCU     ( pcCU, uiIsLast );
389    m_pcCuDecoder->decompressCU ( pcCU );
390   
391#if ENC_DEC_TRACE
392    g_bJustDoIt = g_bEncDecTraceDisable;
393#endif
394    if( iSymbolMode )
395    {
396#if OL_FLUSH
397      /*If at the end of a LCU line but not at the end of a substream, perform CABAC flush*/
398#if WPP_SIMPLIFICATION
399      if (!uiIsLast && pcSlice->getPPS()->getNumSubstreams() > 1)
400#else
401      if (!uiIsLast && pcSlice->getPPS()->getCabacIstateReset())
402#endif
403      {
404#if !REMOVE_TILE_DEPENDENCE
405        if ((iBreakDep && (uiCol == uiTileLCUX+uiTileWidth-1) && (uiLin+iNumSubstreamsPerTile < uiTileLCUY+uiTileHeight))
406            || (!iBreakDep && (uiCol == uiWidthInLCUs-1) && (uiLin+iNumSubstreams < pcCU->getPic()->getFrameHeightInCU())))
407#else
408        if ((uiCol == uiTileLCUX+uiTileWidth-1) && (uiLin+iNumSubstreamsPerTile < uiTileLCUY+uiTileHeight))
409#endif
410        {
411          m_pcEntropyDecoder->decodeFlush();
412        }
413      }
414#endif
415      pcSbacDecoders[uiSubStrm].load(pcSbacDecoder);
416
417      //Store probabilities of second LCU in line into buffer
418#if WPP_SIMPLIFICATION
419      if (pcSlice->getPPS()->getNumSubstreams() > 1 && (uiCol == uiTileLCUX+1))
420#else
421      if (pcSlice->getPPS()->getEntropyCodingSynchro() && (uiCol == uiTileLCUX+pcSlice->getPPS()->getEntropyCodingSynchro()))
422#endif
423      {
424        m_pcBufferSbacDecoders[uiTileCol].loadContexts( &pcSbacDecoders[uiSubStrm] );
425      }
426
427    }
428#if !REMOVE_TILE_DEPENDENCE
429    if ( (rpcPic->getPicSym()->getTileBoundaryIndependenceIdr()==0) && (rpcPic->getPicSym()->getNumColumnsMinus1()!=0) )
430    {
431      pcSbacDecoders[uiSubStrm].load(pcSbacDecoder);
432       //Store probabilties for next tile
433      if( (uiLin == (rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getFirstCUAddr() / uiWidthInLCUs )) && 
434          (uiCol == rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getRightEdgePosInCU()) )
435      {
436        m_pcBufferLowLatSbacDecoders[uiTileCol].loadContexts( &pcSbacDecoders[uiSubStrm] );
437      }
438    }
439#endif
440  }
441
442}
443
444ParameterSetManagerDecoder::ParameterSetManagerDecoder()
445: m_spsBuffer(256)
446, m_ppsBuffer(16)
447, m_apsBuffer(64)
448{
449
450}
451
452ParameterSetManagerDecoder::~ParameterSetManagerDecoder()
453{
454
455}
456
457TComSPS* ParameterSetManagerDecoder::getPrefetchedSPS  (Int spsId)
458{
459  if (m_spsBuffer.getPS(spsId) != NULL )
460  {
461    return m_spsBuffer.getPS(spsId);
462  }
463  else
464  {
465    return getSPS(spsId);
466  }
467}
468
469TComPPS* ParameterSetManagerDecoder::getPrefetchedPPS  (Int ppsId)
470{
471  if (m_ppsBuffer.getPS(ppsId) != NULL )
472  {
473    return m_ppsBuffer.getPS(ppsId);
474  }
475  else
476  {
477    return getPPS(ppsId);
478  }
479}
480
481TComAPS* ParameterSetManagerDecoder::getPrefetchedAPS  (Int apsId)
482{
483  if (m_apsBuffer.getPS(apsId) != NULL )
484  {
485    return m_apsBuffer.getPS(apsId);
486  }
487  else
488  {
489    return getAPS(apsId);
490  }
491}
492
493Void     ParameterSetManagerDecoder::applyPrefetchedPS()
494{
495  m_apsMap.mergePSList(m_apsBuffer);
496  m_ppsMap.mergePSList(m_ppsBuffer);
497  m_spsMap.mergePSList(m_spsBuffer);
498}
499
500//! \}
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