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/** \file     ProfileLevelTier.cpp
    \brief    Handle profile, level and tier information.
*/


#include "ProfileLevelTier.h"
#include "CommonLib/Slice.h"
#include <math.h>

uint32_t
LevelTierFeatures::getMaxPicWidthInLumaSamples()  const
{
  return uint32_t(sqrt(maxLumaPs*8.0));
}

uint32_t
LevelTierFeatures::getMaxPicHeightInLumaSamples() const
{
  return uint32_t(sqrt(maxLumaPs*8.0));
}

static const uint64_t MAX_CNFUINT64 = std::numeric_limits<uint64_t>::max();

static const LevelTierFeatures mainLevelTierInfo[] =
{
    //  level        , maxlumaps,      maxcpb[tier],,    maxSlice,    tile rows, cols,     maxLumaSr,       maxBr[tier],,  , minCr[tier],,
    { Level::LEVEL1  ,    36864, {      350,        0 },       16,        1,        1,     552960ULL, {     128,        0 }, { 2, 2} },
    { Level::LEVEL2  ,   122880, {     1500,        0 },       16,        1,        1,    3686400ULL, {    1500,        0 }, { 2, 2} },
    { Level::LEVEL2_1,   245760, {     3000,        0 },       20,        1,        1,    7372800ULL, {    3000,        0 }, { 2, 2} },
    { Level::LEVEL3  ,   552960, {     6000,        0 },       30,        2,        2,   16588800ULL, {    6000,        0 }, { 2, 2} },
    { Level::LEVEL3_1,   983040, {    10000,        0 },       40,        3,        3,   33177600ULL, {   10000,        0 }, { 2, 2} },
    { Level::LEVEL4  ,  2228224, {    12000,    30000 },       75,        5,        5,   66846720ULL, {   12000,    30000 }, { 4, 4} },
    { Level::LEVEL4_1,  2228224, {    20000,    50000 },       75,        5,        5,  133693440ULL, {   20000,    50000 }, { 4, 4} },
    { Level::LEVEL5  ,  8912896, {    25000,   100000 },      200,       11,       10,  267386880ULL, {   25000,   100000 }, { 6, 4} },
    { Level::LEVEL5_1,  8912896, {    40000,   160000 },      200,       11,       10,  534773760ULL, {   40000,   160000 }, { 8, 4} },
    { Level::LEVEL5_2,  8912896, {    60000,   240000 },      200,       11,       10, 1069547520ULL, {   60000,   240000 }, { 8, 4} },
    { Level::LEVEL6  , 35651584, {    60000,   240000 },      600,       22,       20, 1069547520ULL, {   60000,   240000 }, { 8, 4} },
    { Level::LEVEL6_1, 35651584, {   120000,   480000 },      600,       22,       20, 2139095040ULL, {  120000,   480000 }, { 8, 4} },
    { Level::LEVEL6_2, 35651584, {   240000,   800000 },      600,       22,       20, 4278190080ULL, {  240000,   800000 }, { 6, 4} },
    { Level::LEVEL8_5, MAX_UINT, { MAX_UINT, MAX_UINT }, MAX_UINT, MAX_UINT, MAX_UINT, MAX_CNFUINT64, {MAX_UINT, MAX_UINT }, { 0, 0} },
    { Level::NONE    }
};

static const ProfileFeatures validProfiles[] =
{   //  profile,                   pNameString,             maxBitDepth, maxChrFmt,  lvl8.5, cpbvcl, cpbnal, fcf*1000, mincr*10, levelInfo
    { Profile::MAIN_10,            "Main_10",                        10, CHROMA_420, false,   1000,   1100,     1875,   10    , mainLevelTierInfo },
    { Profile::MAIN_444_10,        "Main_444_10",                    10, CHROMA_444, false,   2500,   2750,     3750,    5    , mainLevelTierInfo },
    { Profile::NONE, 0 }
};

void
ProfileLevelTierFeatures::extractPTLInformation(const SPS &sps)
{
  const ProfileTierLevel &spsPtl =*(sps.getProfileTierLevel());

  m_tier = spsPtl.getTierFlag();

  // Identify the profile from the profile Idc, and possibly other constraints.
  for(int32_t i=0; validProfiles[i].profile != Profile::NONE; i++)
  {
    if (spsPtl.getProfileIdc() == validProfiles[i].profile)
    {
      m_pProfile = &(validProfiles[i]);
      break;
    }
  }

  if (m_pProfile != 0)
  {
    // Now identify the level:
    const LevelTierFeatures *pLTF = m_pProfile->pLevelTiersListInfo;
    const Level::Name spsLevelName = spsPtl.getLevelIdc();
    if (spsLevelName!=Level::LEVEL8_5 || m_pProfile->canUseLevel8p5)
    {
      for(int i=0; pLTF[i].level!=Level::NONE; i++)
      {
        if (pLTF[i].level == spsLevelName)
        {
          m_pLevelTier = &(pLTF[i]);
        }
      }
    }
  }
}

double ProfileLevelTierFeatures::getMinCr() const
{
  return (m_pLevelTier!=0 && m_pProfile!=0) ? (m_pProfile->minCrScaleFactorx10 * m_pLevelTier->minCrBase[m_tier?1:0])/10.0 : 0.0 ;
}

uint64_t ProfileLevelTierFeatures::getCpbSizeInBits() const
{
  return (m_pLevelTier!=0 && m_pProfile!=0) ? uint64_t(m_pProfile->cpbVclFactor) * m_pLevelTier->maxCpb[m_tier?1:0] : uint64_t(0);
}

#if JVET_Q0814_DPB
uint32_t ProfileLevelTierFeatures::getMaxDpbSize( uint32_t picSizeMaxInSamplesY ) const
{
  const uint32_t maxDpbPicBuf = 8;
  uint32_t maxDpbSize = maxDpbPicBuf;

  if( picSizeMaxInSamplesY <= ( m_pLevelTier->maxLumaPs >> 2 ) )
  {
    maxDpbSize = std::min<uint32_t>( 4 * maxDpbPicBuf, 16 );
  }
  else if( picSizeMaxInSamplesY <= ( m_pLevelTier->maxLumaPs >> 1 ) )
  {
    maxDpbSize = std::min<uint32_t>( 2 * maxDpbPicBuf, 16 );
  }
  else if( picSizeMaxInSamplesY <= ( ( 3 * m_pLevelTier->maxLumaPs ) >> 2 ) )
  {
    maxDpbSize = std::min<uint32_t>( ( 4 * maxDpbPicBuf ) / 3, 16 );
  }

  return maxDpbSize;
}
#endif