--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/x265/source/common/cudata.cpp	Wed Nov 16 11:16:33 2016 +0200
@@ -0,0 +1,2035 @@
+/*****************************************************************************
+ * Copyright (C) 2015 x265 project
+ *
+ * Authors: Steve Borho <steve@borho.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
+ *
+ * This program is also available under a commercial proprietary license.
+ * For more information, contact us at license @ x265.com.
+ *****************************************************************************/
+
+#include "common.h"
+#include "frame.h"
+#include "framedata.h"
+#include "picyuv.h"
+#include "mv.h"
+#include "cudata.h"
+
+using namespace X265_NS;
+
+/* for all bcast* and copy* functions, dst and src are aligned to MIN(size, 32) */
+
+static void bcast1(uint8_t* dst, uint8_t val)  { dst[0] = val; }
+
+static void copy4(uint8_t* dst, uint8_t* src)  { ((uint32_t*)dst)[0] = ((uint32_t*)src)[0]; }
+static void bcast4(uint8_t* dst, uint8_t val)  { ((uint32_t*)dst)[0] = 0x01010101u * val; }
+
+static void copy16(uint8_t* dst, uint8_t* src) { ((uint64_t*)dst)[0] = ((uint64_t*)src)[0]; ((uint64_t*)dst)[1] = ((uint64_t*)src)[1]; }
+static void bcast16(uint8_t* dst, uint8_t val) { uint64_t bval = 0x0101010101010101ULL * val; ((uint64_t*)dst)[0] = bval; ((uint64_t*)dst)[1] = bval; }
+
+static void copy64(uint8_t* dst, uint8_t* src) { ((uint64_t*)dst)[0] = ((uint64_t*)src)[0]; ((uint64_t*)dst)[1] = ((uint64_t*)src)[1]; 
+                                                 ((uint64_t*)dst)[2] = ((uint64_t*)src)[2]; ((uint64_t*)dst)[3] = ((uint64_t*)src)[3];
+                                                 ((uint64_t*)dst)[4] = ((uint64_t*)src)[4]; ((uint64_t*)dst)[5] = ((uint64_t*)src)[5];
+                                                 ((uint64_t*)dst)[6] = ((uint64_t*)src)[6]; ((uint64_t*)dst)[7] = ((uint64_t*)src)[7]; }
+static void bcast64(uint8_t* dst, uint8_t val) { uint64_t bval = 0x0101010101010101ULL * val;
+                                                 ((uint64_t*)dst)[0] = bval; ((uint64_t*)dst)[1] = bval; ((uint64_t*)dst)[2] = bval; ((uint64_t*)dst)[3] = bval;
+                                                 ((uint64_t*)dst)[4] = bval; ((uint64_t*)dst)[5] = bval; ((uint64_t*)dst)[6] = bval; ((uint64_t*)dst)[7] = bval; }
+
+/* at 256 bytes, memset/memcpy will probably use SIMD more effectively than our uint64_t hack,
+ * but hand-written assembly would beat it. */
+static void copy256(uint8_t* dst, uint8_t* src) { memcpy(dst, src, 256); }
+static void bcast256(uint8_t* dst, uint8_t val) { memset(dst, val, 256); }
+
+namespace {
+// file private namespace
+
+/* Check whether 2 addresses point to the same column */
+inline bool isEqualCol(int addrA, int addrB, int numUnits)
+{
+    // addrA % numUnits == addrB % numUnits
+    return ((addrA ^ addrB) &  (numUnits - 1)) == 0;
+}
+
+/* Check whether 2 addresses point to the same row */
+inline bool isEqualRow(int addrA, int addrB, int numUnits)
+{
+    // addrA / numUnits == addrB / numUnits
+    return ((addrA ^ addrB) & ~(numUnits - 1)) == 0;
+}
+
+/* Check whether 2 addresses point to the same row or column */
+inline bool isEqualRowOrCol(int addrA, int addrB, int numUnits)
+{
+    return isEqualCol(addrA, addrB, numUnits) | isEqualRow(addrA, addrB, numUnits);
+}
+
+/* Check whether one address points to the first column */
+inline bool isZeroCol(int addr, int numUnits)
+{
+    // addr % numUnits == 0
+    return (addr & (numUnits - 1)) == 0;
+}
+
+/* Check whether one address points to the first row */
+inline bool isZeroRow(int addr, int numUnits)
+{
+    // addr / numUnits == 0
+    return (addr & ~(numUnits - 1)) == 0;
+}
+
+/* Check whether one address points to a column whose index is smaller than a given value */
+inline bool lessThanCol(int addr, int val, int numUnits)
+{
+    // addr % numUnits < val
+    return (addr & (numUnits - 1)) < val;
+}
+
+/* Check whether one address points to a row whose index is smaller than a given value */
+inline bool lessThanRow(int addr, int val, int numUnits)
+{
+    // addr / numUnits < val
+    return addr < val * numUnits;
+}
+
+inline MV scaleMv(MV mv, int scale)
+{
+    int mvx = x265_clip3(-32768, 32767, (scale * mv.x + 127 + (scale * mv.x < 0)) >> 8);
+    int mvy = x265_clip3(-32768, 32767, (scale * mv.y + 127 + (scale * mv.y < 0)) >> 8);
+
+    return MV((int16_t)mvx, (int16_t)mvy);
+}
+
+}
+
+cubcast_t CUData::s_partSet[NUM_FULL_DEPTH] = { NULL, NULL, NULL, NULL, NULL };
+uint32_t CUData::s_numPartInCUSize;
+
+CUData::CUData()
+{
+    memset(this, 0, sizeof(*this));
+}
+
+void CUData::initialize(const CUDataMemPool& dataPool, uint32_t depth, int csp, int instance)
+{
+    m_chromaFormat  = csp;
+    m_hChromaShift  = CHROMA_H_SHIFT(csp);
+    m_vChromaShift  = CHROMA_V_SHIFT(csp);
+    m_numPartitions = NUM_4x4_PARTITIONS >> (depth * 2);
+
+    if (!s_partSet[0])
+    {
+        s_numPartInCUSize = 1 << g_unitSizeDepth;
+        switch (g_maxLog2CUSize)
+        {
+        case 6:
+            s_partSet[0] = bcast256;
+            s_partSet[1] = bcast64;
+            s_partSet[2] = bcast16;
+            s_partSet[3] = bcast4;
+            s_partSet[4] = bcast1;
+            break;
+        case 5:
+            s_partSet[0] = bcast64;
+            s_partSet[1] = bcast16;
+            s_partSet[2] = bcast4;
+            s_partSet[3] = bcast1;
+            s_partSet[4] = NULL;
+            break;
+        case 4:
+            s_partSet[0] = bcast16;
+            s_partSet[1] = bcast4;
+            s_partSet[2] = bcast1;
+            s_partSet[3] = NULL;
+            s_partSet[4] = NULL;
+            break;
+        default:
+            X265_CHECK(0, "unexpected CTU size\n");
+            break;
+        }
+    }
+
+    switch (m_numPartitions)
+    {
+    case 256: // 64x64 CU
+        m_partCopy = copy256;
+        m_partSet = bcast256;
+        m_subPartCopy = copy64;
+        m_subPartSet = bcast64;
+        break;
+    case 64:  // 32x32 CU
+        m_partCopy = copy64;
+        m_partSet = bcast64;
+        m_subPartCopy = copy16;
+        m_subPartSet = bcast16;
+        break;
+    case 16:  // 16x16 CU
+        m_partCopy = copy16;
+        m_partSet = bcast16;
+        m_subPartCopy = copy4;
+        m_subPartSet = bcast4;
+        break;
+    case 4:   // 8x8 CU
+        m_partCopy = copy4;
+        m_partSet = bcast4;
+        m_subPartCopy = NULL;
+        m_subPartSet = NULL;
+        break;
+    default:
+        X265_CHECK(0, "unexpected CU partition count\n");
+        break;
+    }
+
+    /* Each CU's data is layed out sequentially within the charMemBlock */
+    uint8_t *charBuf = dataPool.charMemBlock + (m_numPartitions * BytesPerPartition) * instance;
+
+    m_qp        = (int8_t*)charBuf; charBuf += m_numPartitions;
+    m_log2CUSize         = charBuf; charBuf += m_numPartitions;
+    m_lumaIntraDir       = charBuf; charBuf += m_numPartitions;
+    m_tqBypass           = charBuf; charBuf += m_numPartitions;
+    m_refIdx[0] = (int8_t*)charBuf; charBuf += m_numPartitions;
+    m_refIdx[1] = (int8_t*)charBuf; charBuf += m_numPartitions;
+    m_cuDepth            = charBuf; charBuf += m_numPartitions;
+    m_predMode           = charBuf; charBuf += m_numPartitions; /* the order up to here is important in initCTU() and initSubCU() */
+    m_partSize           = charBuf; charBuf += m_numPartitions;
+    m_mergeFlag          = charBuf; charBuf += m_numPartitions;
+    m_interDir           = charBuf; charBuf += m_numPartitions;
+    m_mvpIdx[0]          = charBuf; charBuf += m_numPartitions;
+    m_mvpIdx[1]          = charBuf; charBuf += m_numPartitions;
+    m_tuDepth            = charBuf; charBuf += m_numPartitions;
+    m_transformSkip[0]   = charBuf; charBuf += m_numPartitions;
+    m_transformSkip[1]   = charBuf; charBuf += m_numPartitions;
+    m_transformSkip[2]   = charBuf; charBuf += m_numPartitions;
+    m_cbf[0]             = charBuf; charBuf += m_numPartitions;
+    m_cbf[1]             = charBuf; charBuf += m_numPartitions;
+    m_cbf[2]             = charBuf; charBuf += m_numPartitions;
+    m_chromaIntraDir     = charBuf; charBuf += m_numPartitions;
+
+    X265_CHECK(charBuf == dataPool.charMemBlock + (m_numPartitions * BytesPerPartition) * (instance + 1), "CU data layout is broken\n");
+
+    m_mv[0]  = dataPool.mvMemBlock + (instance * 4) * m_numPartitions;
+    m_mv[1]  = m_mv[0] +  m_numPartitions;
+    m_mvd[0] = m_mv[1] +  m_numPartitions;
+    m_mvd[1] = m_mvd[0] + m_numPartitions;
+
+    uint32_t cuSize = g_maxCUSize >> depth;
+    uint32_t sizeL = cuSize * cuSize;
+    uint32_t sizeC = sizeL >> (m_hChromaShift + m_vChromaShift);
+    m_trCoeff[0] = dataPool.trCoeffMemBlock + instance * (sizeL + sizeC * 2);
+    m_trCoeff[1] = m_trCoeff[0] + sizeL;
+    m_trCoeff[2] = m_trCoeff[0] + sizeL + sizeC;
+}
+
+void CUData::initCTU(const Frame& frame, uint32_t cuAddr, int qp)
+{
+    m_encData       = frame.m_encData;
+    m_slice         = m_encData->m_slice;
+    m_cuAddr        = cuAddr;
+    m_cuPelX        = (cuAddr % m_slice->m_sps->numCuInWidth) << g_maxLog2CUSize;
+    m_cuPelY        = (cuAddr / m_slice->m_sps->numCuInWidth) << g_maxLog2CUSize;
+    m_absIdxInCTU   = 0;
+    m_numPartitions = NUM_4x4_PARTITIONS;
+
+    /* sequential memsets */
+    m_partSet((uint8_t*)m_qp, (uint8_t)qp);
+    m_partSet(m_log2CUSize,   (uint8_t)g_maxLog2CUSize);
+    m_partSet(m_lumaIntraDir, (uint8_t)DC_IDX);
+    m_partSet(m_tqBypass,     (uint8_t)frame.m_encData->m_param->bLossless);
+    if (m_slice->m_sliceType != I_SLICE)
+    {
+        m_partSet((uint8_t*)m_refIdx[0], (uint8_t)REF_NOT_VALID);
+        m_partSet((uint8_t*)m_refIdx[1], (uint8_t)REF_NOT_VALID);
+    }
+
+    X265_CHECK(!(frame.m_encData->m_param->bLossless && !m_slice->m_pps->bTransquantBypassEnabled), "lossless enabled without TQbypass in PPS\n");
+
+    /* initialize the remaining CU data in one memset */
+    memset(m_cuDepth, 0, (BytesPerPartition - 6) * m_numPartitions);
+
+    uint32_t widthInCU = m_slice->m_sps->numCuInWidth;
+    m_cuLeft = (m_cuAddr % widthInCU) ? m_encData->getPicCTU(m_cuAddr - 1) : NULL;
+    m_cuAbove = (m_cuAddr / widthInCU) ? m_encData->getPicCTU(m_cuAddr - widthInCU) : NULL;
+    m_cuAboveLeft = (m_cuLeft && m_cuAbove) ? m_encData->getPicCTU(m_cuAddr - widthInCU - 1) : NULL;
+    m_cuAboveRight = (m_cuAbove && ((m_cuAddr % widthInCU) < (widthInCU - 1))) ? m_encData->getPicCTU(m_cuAddr - widthInCU + 1) : NULL;
+}
+
+// initialize Sub partition
+void CUData::initSubCU(const CUData& ctu, const CUGeom& cuGeom, int qp)
+{
+    m_absIdxInCTU   = cuGeom.absPartIdx;
+    m_encData       = ctu.m_encData;
+    m_slice         = ctu.m_slice;
+    m_cuAddr        = ctu.m_cuAddr;
+    m_cuPelX        = ctu.m_cuPelX + g_zscanToPelX[cuGeom.absPartIdx];
+    m_cuPelY        = ctu.m_cuPelY + g_zscanToPelY[cuGeom.absPartIdx];
+    m_cuLeft        = ctu.m_cuLeft;
+    m_cuAbove       = ctu.m_cuAbove;
+    m_cuAboveLeft   = ctu.m_cuAboveLeft;
+    m_cuAboveRight  = ctu.m_cuAboveRight;
+    X265_CHECK(m_numPartitions == cuGeom.numPartitions, "initSubCU() size mismatch\n");
+
+    m_partSet((uint8_t*)m_qp, (uint8_t)qp);
+
+    m_partSet(m_log2CUSize,   (uint8_t)cuGeom.log2CUSize);
+    m_partSet(m_lumaIntraDir, (uint8_t)DC_IDX);
+    m_partSet(m_tqBypass,     (uint8_t)m_encData->m_param->bLossless);
+    m_partSet((uint8_t*)m_refIdx[0], (uint8_t)REF_NOT_VALID);
+    m_partSet((uint8_t*)m_refIdx[1], (uint8_t)REF_NOT_VALID);
+    m_partSet(m_cuDepth,      (uint8_t)cuGeom.depth);
+
+    /* initialize the remaining CU data in one memset */
+    memset(m_predMode, 0, (BytesPerPartition - 7) * m_numPartitions);
+}
+
+/* Copy the results of a sub-part (split) CU to the parent CU */
+void CUData::copyPartFrom(const CUData& subCU, const CUGeom& childGeom, uint32_t subPartIdx)
+{
+    X265_CHECK(subPartIdx < 4, "part unit should be less than 4\n");
+
+    uint32_t offset = childGeom.numPartitions * subPartIdx;
+
+    m_subPartCopy((uint8_t*)m_qp + offset, (uint8_t*)subCU.m_qp);
+    m_subPartCopy(m_log2CUSize + offset, subCU.m_log2CUSize);
+    m_subPartCopy(m_lumaIntraDir + offset, subCU.m_lumaIntraDir);
+    m_subPartCopy(m_tqBypass + offset, subCU.m_tqBypass);
+    m_subPartCopy((uint8_t*)m_refIdx[0] + offset, (uint8_t*)subCU.m_refIdx[0]);
+    m_subPartCopy((uint8_t*)m_refIdx[1] + offset, (uint8_t*)subCU.m_refIdx[1]);
+    m_subPartCopy(m_cuDepth + offset, subCU.m_cuDepth);
+    m_subPartCopy(m_predMode + offset, subCU.m_predMode);
+    m_subPartCopy(m_partSize + offset, subCU.m_partSize);
+    m_subPartCopy(m_mergeFlag + offset, subCU.m_mergeFlag);
+    m_subPartCopy(m_interDir + offset, subCU.m_interDir);
+    m_subPartCopy(m_mvpIdx[0] + offset, subCU.m_mvpIdx[0]);
+    m_subPartCopy(m_mvpIdx[1] + offset, subCU.m_mvpIdx[1]);
+    m_subPartCopy(m_tuDepth + offset, subCU.m_tuDepth);
+    m_subPartCopy(m_transformSkip[0] + offset, subCU.m_transformSkip[0]);
+    m_subPartCopy(m_transformSkip[1] + offset, subCU.m_transformSkip[1]);
+    m_subPartCopy(m_transformSkip[2] + offset, subCU.m_transformSkip[2]);
+    m_subPartCopy(m_cbf[0] + offset, subCU.m_cbf[0]);
+    m_subPartCopy(m_cbf[1] + offset, subCU.m_cbf[1]);
+    m_subPartCopy(m_cbf[2] + offset, subCU.m_cbf[2]);
+    m_subPartCopy(m_chromaIntraDir + offset, subCU.m_chromaIntraDir);
+
+    memcpy(m_mv[0] + offset, subCU.m_mv[0], childGeom.numPartitions * sizeof(MV));
+    memcpy(m_mv[1] + offset, subCU.m_mv[1], childGeom.numPartitions * sizeof(MV));
+    memcpy(m_mvd[0] + offset, subCU.m_mvd[0], childGeom.numPartitions * sizeof(MV));
+    memcpy(m_mvd[1] + offset, subCU.m_mvd[1], childGeom.numPartitions * sizeof(MV));
+
+    uint32_t tmp = 1 << ((g_maxLog2CUSize - childGeom.depth) * 2);
+    uint32_t tmp2 = subPartIdx * tmp;
+    memcpy(m_trCoeff[0] + tmp2, subCU.m_trCoeff[0], sizeof(coeff_t) * tmp);
+
+    uint32_t tmpC = tmp >> (m_hChromaShift + m_vChromaShift);
+    uint32_t tmpC2 = tmp2 >> (m_hChromaShift + m_vChromaShift);
+    memcpy(m_trCoeff[1] + tmpC2, subCU.m_trCoeff[1], sizeof(coeff_t) * tmpC);
+    memcpy(m_trCoeff[2] + tmpC2, subCU.m_trCoeff[2], sizeof(coeff_t) * tmpC);
+}
+
+/* If a sub-CU part is not present (off the edge of the picture) its depth and
+ * log2size should still be configured */
+void CUData::setEmptyPart(const CUGeom& childGeom, uint32_t subPartIdx)
+{
+    uint32_t offset = childGeom.numPartitions * subPartIdx;
+    m_subPartSet(m_cuDepth + offset, (uint8_t)childGeom.depth);
+    m_subPartSet(m_log2CUSize + offset, (uint8_t)childGeom.log2CUSize);
+}
+
+/* Copy all CU data from one instance to the next, except set lossless flag
+ * This will only get used when --cu-lossless is enabled but --lossless is not. */
+void CUData::initLosslessCU(const CUData& cu, const CUGeom& cuGeom)
+{
+    /* Start by making an exact copy */
+    m_encData      = cu.m_encData;
+    m_slice        = cu.m_slice;
+    m_cuAddr       = cu.m_cuAddr;
+    m_cuPelX       = cu.m_cuPelX;
+    m_cuPelY       = cu.m_cuPelY;
+    m_cuLeft       = cu.m_cuLeft;
+    m_cuAbove      = cu.m_cuAbove;
+    m_cuAboveLeft  = cu.m_cuAboveLeft;
+    m_cuAboveRight = cu.m_cuAboveRight;
+    m_absIdxInCTU  = cuGeom.absPartIdx;
+    m_numPartitions = cuGeom.numPartitions;
+    memcpy(m_qp, cu.m_qp, BytesPerPartition * m_numPartitions);
+    memcpy(m_mv[0],  cu.m_mv[0],  m_numPartitions * sizeof(MV));
+    memcpy(m_mv[1],  cu.m_mv[1],  m_numPartitions * sizeof(MV));
+    memcpy(m_mvd[0], cu.m_mvd[0], m_numPartitions * sizeof(MV));
+    memcpy(m_mvd[1], cu.m_mvd[1], m_numPartitions * sizeof(MV));
+
+    /* force TQBypass to true */
+    m_partSet(m_tqBypass, true);
+
+    /* clear residual coding flags */
+    m_partSet(m_predMode, cu.m_predMode[0] & (MODE_INTRA | MODE_INTER));
+    m_partSet(m_tuDepth, 0);
+    m_partSet(m_transformSkip[0], 0);
+    m_partSet(m_transformSkip[1], 0);
+    m_partSet(m_transformSkip[2], 0);
+    m_partSet(m_cbf[0], 0);
+    m_partSet(m_cbf[1], 0);
+    m_partSet(m_cbf[2], 0);
+}
+
+/* Copy completed predicted CU to CTU in picture */
+void CUData::copyToPic(uint32_t depth) const
+{
+    CUData& ctu = *m_encData->getPicCTU(m_cuAddr);
+
+    m_partCopy((uint8_t*)ctu.m_qp + m_absIdxInCTU, (uint8_t*)m_qp);
+    m_partCopy(ctu.m_log2CUSize + m_absIdxInCTU, m_log2CUSize);
+    m_partCopy(ctu.m_lumaIntraDir + m_absIdxInCTU, m_lumaIntraDir);
+    m_partCopy(ctu.m_tqBypass + m_absIdxInCTU, m_tqBypass);
+    m_partCopy((uint8_t*)ctu.m_refIdx[0] + m_absIdxInCTU, (uint8_t*)m_refIdx[0]);
+    m_partCopy((uint8_t*)ctu.m_refIdx[1] + m_absIdxInCTU, (uint8_t*)m_refIdx[1]);
+    m_partCopy(ctu.m_cuDepth + m_absIdxInCTU, m_cuDepth);
+    m_partCopy(ctu.m_predMode + m_absIdxInCTU, m_predMode);
+    m_partCopy(ctu.m_partSize + m_absIdxInCTU, m_partSize);
+    m_partCopy(ctu.m_mergeFlag + m_absIdxInCTU, m_mergeFlag);
+    m_partCopy(ctu.m_interDir + m_absIdxInCTU, m_interDir);
+    m_partCopy(ctu.m_mvpIdx[0] + m_absIdxInCTU, m_mvpIdx[0]);
+    m_partCopy(ctu.m_mvpIdx[1] + m_absIdxInCTU, m_mvpIdx[1]);
+    m_partCopy(ctu.m_tuDepth + m_absIdxInCTU, m_tuDepth);
+    m_partCopy(ctu.m_transformSkip[0] + m_absIdxInCTU, m_transformSkip[0]);
+    m_partCopy(ctu.m_transformSkip[1] + m_absIdxInCTU, m_transformSkip[1]);
+    m_partCopy(ctu.m_transformSkip[2] + m_absIdxInCTU, m_transformSkip[2]);
+    m_partCopy(ctu.m_cbf[0] + m_absIdxInCTU, m_cbf[0]);
+    m_partCopy(ctu.m_cbf[1] + m_absIdxInCTU, m_cbf[1]);
+    m_partCopy(ctu.m_cbf[2] + m_absIdxInCTU, m_cbf[2]);
+    m_partCopy(ctu.m_chromaIntraDir + m_absIdxInCTU, m_chromaIntraDir);
+
+    memcpy(ctu.m_mv[0] + m_absIdxInCTU,  m_mv[0],  m_numPartitions * sizeof(MV));
+    memcpy(ctu.m_mv[1] + m_absIdxInCTU,  m_mv[1],  m_numPartitions * sizeof(MV));
+    memcpy(ctu.m_mvd[0] + m_absIdxInCTU, m_mvd[0], m_numPartitions * sizeof(MV));
+    memcpy(ctu.m_mvd[1] + m_absIdxInCTU, m_mvd[1], m_numPartitions * sizeof(MV));
+
+    uint32_t tmpY = 1 << ((g_maxLog2CUSize - depth) * 2);
+    uint32_t tmpY2 = m_absIdxInCTU << (LOG2_UNIT_SIZE * 2);
+    memcpy(ctu.m_trCoeff[0] + tmpY2, m_trCoeff[0], sizeof(coeff_t) * tmpY);
+
+    uint32_t tmpC = tmpY >> (m_hChromaShift + m_vChromaShift);
+    uint32_t tmpC2 = tmpY2 >> (m_hChromaShift + m_vChromaShift);
+    memcpy(ctu.m_trCoeff[1] + tmpC2, m_trCoeff[1], sizeof(coeff_t) * tmpC);
+    memcpy(ctu.m_trCoeff[2] + tmpC2, m_trCoeff[2], sizeof(coeff_t) * tmpC);
+}
+
+/* The reverse of copyToPic, called only by encodeResidue */
+void CUData::copyFromPic(const CUData& ctu, const CUGeom& cuGeom)
+{
+    m_encData       = ctu.m_encData;
+    m_slice         = ctu.m_slice;
+    m_cuAddr        = ctu.m_cuAddr;
+    m_cuPelX        = ctu.m_cuPelX + g_zscanToPelX[cuGeom.absPartIdx];
+    m_cuPelY        = ctu.m_cuPelY + g_zscanToPelY[cuGeom.absPartIdx];
+    m_absIdxInCTU   = cuGeom.absPartIdx;
+    m_numPartitions = cuGeom.numPartitions;
+
+    /* copy out all prediction info for this part */
+    m_partCopy((uint8_t*)m_qp, (uint8_t*)ctu.m_qp + m_absIdxInCTU);
+    m_partCopy(m_log2CUSize,   ctu.m_log2CUSize + m_absIdxInCTU);
+    m_partCopy(m_lumaIntraDir, ctu.m_lumaIntraDir + m_absIdxInCTU);
+    m_partCopy(m_tqBypass,     ctu.m_tqBypass + m_absIdxInCTU);
+    m_partCopy((uint8_t*)m_refIdx[0], (uint8_t*)ctu.m_refIdx[0] + m_absIdxInCTU);
+    m_partCopy((uint8_t*)m_refIdx[1], (uint8_t*)ctu.m_refIdx[1] + m_absIdxInCTU);
+    m_partCopy(m_cuDepth,      ctu.m_cuDepth + m_absIdxInCTU);
+    m_partSet(m_predMode, ctu.m_predMode[m_absIdxInCTU] & (MODE_INTRA | MODE_INTER)); /* clear skip flag */
+    m_partCopy(m_partSize,     ctu.m_partSize + m_absIdxInCTU);
+    m_partCopy(m_mergeFlag,    ctu.m_mergeFlag + m_absIdxInCTU);
+    m_partCopy(m_interDir,     ctu.m_interDir + m_absIdxInCTU);
+    m_partCopy(m_mvpIdx[0],    ctu.m_mvpIdx[0] + m_absIdxInCTU);
+    m_partCopy(m_mvpIdx[1],    ctu.m_mvpIdx[1] + m_absIdxInCTU);
+    m_partCopy(m_chromaIntraDir, ctu.m_chromaIntraDir + m_absIdxInCTU);
+
+    memcpy(m_mv[0],  ctu.m_mv[0] + m_absIdxInCTU,  m_numPartitions * sizeof(MV));
+    memcpy(m_mv[1],  ctu.m_mv[1] + m_absIdxInCTU,  m_numPartitions * sizeof(MV));
+    memcpy(m_mvd[0], ctu.m_mvd[0] + m_absIdxInCTU, m_numPartitions * sizeof(MV));
+    memcpy(m_mvd[1], ctu.m_mvd[1] + m_absIdxInCTU, m_numPartitions * sizeof(MV));
+
+    /* clear residual coding flags */
+    m_partSet(m_tuDepth, 0);
+    m_partSet(m_transformSkip[0], 0);
+    m_partSet(m_transformSkip[1], 0);
+    m_partSet(m_transformSkip[2], 0);
+    m_partSet(m_cbf[0], 0);
+    m_partSet(m_cbf[1], 0);
+    m_partSet(m_cbf[2], 0);
+}
+
+/* Only called by encodeResidue, these fields can be modified during inter/intra coding */
+void CUData::updatePic(uint32_t depth) const
+{
+    CUData& ctu = *m_encData->getPicCTU(m_cuAddr);
+
+    m_partCopy((uint8_t*)ctu.m_qp + m_absIdxInCTU, (uint8_t*)m_qp);
+    m_partCopy(ctu.m_transformSkip[0] + m_absIdxInCTU, m_transformSkip[0]);
+    m_partCopy(ctu.m_transformSkip[1] + m_absIdxInCTU, m_transformSkip[1]);
+    m_partCopy(ctu.m_transformSkip[2] + m_absIdxInCTU, m_transformSkip[2]);
+    m_partCopy(ctu.m_predMode + m_absIdxInCTU, m_predMode);
+    m_partCopy(ctu.m_tuDepth + m_absIdxInCTU, m_tuDepth);
+    m_partCopy(ctu.m_cbf[0] + m_absIdxInCTU, m_cbf[0]);
+    m_partCopy(ctu.m_cbf[1] + m_absIdxInCTU, m_cbf[1]);
+    m_partCopy(ctu.m_cbf[2] + m_absIdxInCTU, m_cbf[2]);
+    m_partCopy(ctu.m_chromaIntraDir + m_absIdxInCTU, m_chromaIntraDir);
+
+    uint32_t tmpY = 1 << ((g_maxLog2CUSize - depth) * 2);
+    uint32_t tmpY2 = m_absIdxInCTU << (LOG2_UNIT_SIZE * 2);
+    memcpy(ctu.m_trCoeff[0] + tmpY2, m_trCoeff[0], sizeof(coeff_t) * tmpY);
+    tmpY  >>= m_hChromaShift + m_vChromaShift;
+    tmpY2 >>= m_hChromaShift + m_vChromaShift;
+    memcpy(ctu.m_trCoeff[1] + tmpY2, m_trCoeff[1], sizeof(coeff_t) * tmpY);
+    memcpy(ctu.m_trCoeff[2] + tmpY2, m_trCoeff[2], sizeof(coeff_t) * tmpY);
+}
+
+const CUData* CUData::getPULeft(uint32_t& lPartUnitIdx, uint32_t curPartUnitIdx) const
+{
+    uint32_t absPartIdx = g_zscanToRaster[curPartUnitIdx];
+
+    if (!isZeroCol(absPartIdx, s_numPartInCUSize))
+    {
+        uint32_t absZorderCUIdx   = g_zscanToRaster[m_absIdxInCTU];
+        lPartUnitIdx = g_rasterToZscan[absPartIdx - 1];
+        if (isEqualCol(absPartIdx, absZorderCUIdx, s_numPartInCUSize))
+            return m_encData->getPicCTU(m_cuAddr);
+        else
+        {
+            lPartUnitIdx -= m_absIdxInCTU;
+            return this;
+        }
+    }
+
+    lPartUnitIdx = g_rasterToZscan[absPartIdx + s_numPartInCUSize - 1];
+    return m_cuLeft;
+}
+
+const CUData* CUData::getPUAbove(uint32_t& aPartUnitIdx, uint32_t curPartUnitIdx) const
+{
+    uint32_t absPartIdx = g_zscanToRaster[curPartUnitIdx];
+
+    if (!isZeroRow(absPartIdx, s_numPartInCUSize))
+    {
+        uint32_t absZorderCUIdx = g_zscanToRaster[m_absIdxInCTU];
+        aPartUnitIdx = g_rasterToZscan[absPartIdx - s_numPartInCUSize];
+        if (isEqualRow(absPartIdx, absZorderCUIdx, s_numPartInCUSize))
+            return m_encData->getPicCTU(m_cuAddr);
+        else
+            aPartUnitIdx -= m_absIdxInCTU;
+        return this;
+    }
+
+    aPartUnitIdx = g_rasterToZscan[absPartIdx + NUM_4x4_PARTITIONS - s_numPartInCUSize];
+    return m_cuAbove;
+}
+
+const CUData* CUData::getPUAboveLeft(uint32_t& alPartUnitIdx, uint32_t curPartUnitIdx) const
+{
+    uint32_t absPartIdx = g_zscanToRaster[curPartUnitIdx];
+
+    if (!isZeroCol(absPartIdx, s_numPartInCUSize))
+    {
+        if (!isZeroRow(absPartIdx, s_numPartInCUSize))
+        {
+            uint32_t absZorderCUIdx  = g_zscanToRaster[m_absIdxInCTU];
+            alPartUnitIdx = g_rasterToZscan[absPartIdx - s_numPartInCUSize - 1];
+            if (isEqualRowOrCol(absPartIdx, absZorderCUIdx, s_numPartInCUSize))
+                return m_encData->getPicCTU(m_cuAddr);
+            else
+            {
+                alPartUnitIdx -= m_absIdxInCTU;
+                return this;
+            }
+        }
+        alPartUnitIdx = g_rasterToZscan[absPartIdx + NUM_4x4_PARTITIONS - s_numPartInCUSize - 1];
+        return m_cuAbove;
+    }
+
+    if (!isZeroRow(absPartIdx, s_numPartInCUSize))
+    {
+        alPartUnitIdx = g_rasterToZscan[absPartIdx - 1];
+        return m_cuLeft;
+    }
+
+    alPartUnitIdx = g_rasterToZscan[NUM_4x4_PARTITIONS - 1];
+    return m_cuAboveLeft;
+}
+
+const CUData* CUData::getPUAboveRight(uint32_t& arPartUnitIdx, uint32_t curPartUnitIdx) const
+{
+    if ((m_encData->getPicCTU(m_cuAddr)->m_cuPelX + g_zscanToPelX[curPartUnitIdx] + UNIT_SIZE) >= m_slice->m_sps->picWidthInLumaSamples)
+        return NULL;
+
+    uint32_t absPartIdxRT = g_zscanToRaster[curPartUnitIdx];
+
+    if (lessThanCol(absPartIdxRT, s_numPartInCUSize - 1, s_numPartInCUSize))
+    {
+        if (!isZeroRow(absPartIdxRT, s_numPartInCUSize))
+        {
+            if (curPartUnitIdx > g_rasterToZscan[absPartIdxRT - s_numPartInCUSize + 1])
+            {
+                uint32_t absZorderCUIdx = g_zscanToRaster[m_absIdxInCTU] + (1 << (m_log2CUSize[0] - LOG2_UNIT_SIZE)) - 1;
+                arPartUnitIdx = g_rasterToZscan[absPartIdxRT - s_numPartInCUSize + 1];
+                if (isEqualRowOrCol(absPartIdxRT, absZorderCUIdx, s_numPartInCUSize))
+                    return m_encData->getPicCTU(m_cuAddr);
+                else
+                {
+                    arPartUnitIdx -= m_absIdxInCTU;
+                    return this;
+                }
+            }
+            return NULL;
+        }
+        arPartUnitIdx = g_rasterToZscan[absPartIdxRT + NUM_4x4_PARTITIONS - s_numPartInCUSize + 1];
+        return m_cuAbove;
+    }
+
+    if (!isZeroRow(absPartIdxRT, s_numPartInCUSize))
+        return NULL;
+
+    arPartUnitIdx = g_rasterToZscan[NUM_4x4_PARTITIONS - s_numPartInCUSize];
+    return m_cuAboveRight;
+}
+
+const CUData* CUData::getPUBelowLeft(uint32_t& blPartUnitIdx, uint32_t curPartUnitIdx) const
+{
+    if ((m_encData->getPicCTU(m_cuAddr)->m_cuPelY + g_zscanToPelY[curPartUnitIdx] + UNIT_SIZE) >= m_slice->m_sps->picHeightInLumaSamples)
+        return NULL;
+
+    uint32_t absPartIdxLB = g_zscanToRaster[curPartUnitIdx];
+
+    if (lessThanRow(absPartIdxLB, s_numPartInCUSize - 1, s_numPartInCUSize))
+    {
+        if (!isZeroCol(absPartIdxLB, s_numPartInCUSize))
+        {
+            if (curPartUnitIdx > g_rasterToZscan[absPartIdxLB + s_numPartInCUSize - 1])
+            {
+                uint32_t absZorderCUIdxLB = g_zscanToRaster[m_absIdxInCTU] + ((1 << (m_log2CUSize[0] - LOG2_UNIT_SIZE)) - 1) * s_numPartInCUSize;
+                blPartUnitIdx = g_rasterToZscan[absPartIdxLB + s_numPartInCUSize - 1];
+                if (isEqualRowOrCol(absPartIdxLB, absZorderCUIdxLB, s_numPartInCUSize))
+                    return m_encData->getPicCTU(m_cuAddr);
+                else
+                {
+                    blPartUnitIdx -= m_absIdxInCTU;
+                    return this;
+                }
+            }
+            return NULL;
+        }
+        blPartUnitIdx = g_rasterToZscan[absPartIdxLB + s_numPartInCUSize * 2 - 1];
+        return m_cuLeft;
+    }
+
+    return NULL;
+}
+
+const CUData* CUData::getPUBelowLeftAdi(uint32_t& blPartUnitIdx,  uint32_t curPartUnitIdx, uint32_t partUnitOffset) const
+{
+    if ((m_encData->getPicCTU(m_cuAddr)->m_cuPelY + g_zscanToPelY[curPartUnitIdx] + (partUnitOffset << LOG2_UNIT_SIZE)) >= m_slice->m_sps->picHeightInLumaSamples)
+        return NULL;
+
+    uint32_t absPartIdxLB = g_zscanToRaster[curPartUnitIdx];
+
+    if (lessThanRow(absPartIdxLB, s_numPartInCUSize - partUnitOffset, s_numPartInCUSize))
+    {
+        if (!isZeroCol(absPartIdxLB, s_numPartInCUSize))
+        {
+            if (curPartUnitIdx > g_rasterToZscan[absPartIdxLB + partUnitOffset * s_numPartInCUSize - 1])
+            {
+                uint32_t absZorderCUIdxLB = g_zscanToRaster[m_absIdxInCTU] + ((1 << (m_log2CUSize[0] - LOG2_UNIT_SIZE)) - 1) * s_numPartInCUSize;
+                blPartUnitIdx = g_rasterToZscan[absPartIdxLB + partUnitOffset * s_numPartInCUSize - 1];
+                if (isEqualRowOrCol(absPartIdxLB, absZorderCUIdxLB, s_numPartInCUSize))
+                    return m_encData->getPicCTU(m_cuAddr);
+                else
+                {
+                    blPartUnitIdx -= m_absIdxInCTU;
+                    return this;
+                }
+            }
+            return NULL;
+        }
+        blPartUnitIdx = g_rasterToZscan[absPartIdxLB + (1 + partUnitOffset) * s_numPartInCUSize - 1];
+        return m_cuLeft;
+    }
+
+    return NULL;
+}
+
+const CUData* CUData::getPUAboveRightAdi(uint32_t& arPartUnitIdx, uint32_t curPartUnitIdx, uint32_t partUnitOffset) const
+{
+    if ((m_encData->getPicCTU(m_cuAddr)->m_cuPelX + g_zscanToPelX[curPartUnitIdx] + (partUnitOffset << LOG2_UNIT_SIZE)) >= m_slice->m_sps->picWidthInLumaSamples)
+        return NULL;
+
+    uint32_t absPartIdxRT = g_zscanToRaster[curPartUnitIdx];
+
+    if (lessThanCol(absPartIdxRT, s_numPartInCUSize - partUnitOffset, s_numPartInCUSize))
+    {
+        if (!isZeroRow(absPartIdxRT, s_numPartInCUSize))
+        {
+            if (curPartUnitIdx > g_rasterToZscan[absPartIdxRT - s_numPartInCUSize + partUnitOffset])
+            {
+                uint32_t absZorderCUIdx = g_zscanToRaster[m_absIdxInCTU] + (1 << (m_log2CUSize[0] - LOG2_UNIT_SIZE)) - 1;
+                arPartUnitIdx = g_rasterToZscan[absPartIdxRT - s_numPartInCUSize + partUnitOffset];
+                if (isEqualRowOrCol(absPartIdxRT, absZorderCUIdx, s_numPartInCUSize))
+                    return m_encData->getPicCTU(m_cuAddr);
+                else
+                {
+                    arPartUnitIdx -= m_absIdxInCTU;
+                    return this;
+                }
+            }
+            return NULL;
+        }
+        arPartUnitIdx = g_rasterToZscan[absPartIdxRT + NUM_4x4_PARTITIONS - s_numPartInCUSize + partUnitOffset];
+        return m_cuAbove;
+    }
+
+    if (!isZeroRow(absPartIdxRT, s_numPartInCUSize))
+        return NULL;
+
+    arPartUnitIdx = g_rasterToZscan[NUM_4x4_PARTITIONS - s_numPartInCUSize + partUnitOffset - 1];
+    return m_cuAboveRight;
+}
+
+/* Get left QpMinCu */
+const CUData* CUData::getQpMinCuLeft(uint32_t& lPartUnitIdx, uint32_t curAbsIdxInCTU) const
+{
+    uint32_t absZorderQpMinCUIdx = curAbsIdxInCTU & (0xFF << (g_unitSizeDepth - m_slice->m_pps->maxCuDQPDepth) * 2);
+    uint32_t absRorderQpMinCUIdx = g_zscanToRaster[absZorderQpMinCUIdx];
+
+    // check for left CTU boundary
+    if (isZeroCol(absRorderQpMinCUIdx, s_numPartInCUSize))
+        return NULL;
+
+    // get index of left-CU relative to top-left corner of current quantization group
+    lPartUnitIdx = g_rasterToZscan[absRorderQpMinCUIdx - 1];
+
+    // return pointer to current CTU
+    return m_encData->getPicCTU(m_cuAddr);
+}
+
+/* Get above QpMinCu */
+const CUData* CUData::getQpMinCuAbove(uint32_t& aPartUnitIdx, uint32_t curAbsIdxInCTU) const
+{
+    uint32_t absZorderQpMinCUIdx = curAbsIdxInCTU & (0xFF << (g_unitSizeDepth - m_slice->m_pps->maxCuDQPDepth) * 2);
+    uint32_t absRorderQpMinCUIdx = g_zscanToRaster[absZorderQpMinCUIdx];
+
+    // check for top CTU boundary
+    if (isZeroRow(absRorderQpMinCUIdx, s_numPartInCUSize))
+        return NULL;
+
+    // get index of top-CU relative to top-left corner of current quantization group
+    aPartUnitIdx = g_rasterToZscan[absRorderQpMinCUIdx - s_numPartInCUSize];
+
+    // return pointer to current CTU
+    return m_encData->getPicCTU(m_cuAddr);
+}
+
+/* Get reference QP from left QpMinCu or latest coded QP */
+int8_t CUData::getRefQP(uint32_t curAbsIdxInCTU) const
+{
+    uint32_t lPartIdx = 0, aPartIdx = 0;
+    const CUData* cULeft = getQpMinCuLeft(lPartIdx, m_absIdxInCTU + curAbsIdxInCTU);
+    const CUData* cUAbove = getQpMinCuAbove(aPartIdx, m_absIdxInCTU + curAbsIdxInCTU);
+
+    return ((cULeft ? cULeft->m_qp[lPartIdx] : getLastCodedQP(curAbsIdxInCTU)) + (cUAbove ? cUAbove->m_qp[aPartIdx] : getLastCodedQP(curAbsIdxInCTU)) + 1) >> 1;
+}
+
+int CUData::getLastValidPartIdx(int absPartIdx) const
+{
+    int lastValidPartIdx = absPartIdx - 1;
+
+    while (lastValidPartIdx >= 0 && m_predMode[lastValidPartIdx] == MODE_NONE)
+    {
+        uint32_t depth = m_cuDepth[lastValidPartIdx];
+        lastValidPartIdx -= m_numPartitions >> (depth << 1);
+    }
+
+    return lastValidPartIdx;
+}
+
+int8_t CUData::getLastCodedQP(uint32_t absPartIdx) const
+{
+    uint32_t quPartIdxMask = 0xFF << (g_unitSizeDepth - m_slice->m_pps->maxCuDQPDepth) * 2;
+    int lastValidPartIdx = getLastValidPartIdx(absPartIdx & quPartIdxMask);
+
+    if (lastValidPartIdx >= 0)
+        return m_qp[lastValidPartIdx];
+    else
+    {
+        if (m_absIdxInCTU)
+            return m_encData->getPicCTU(m_cuAddr)->getLastCodedQP(m_absIdxInCTU);
+        else if (m_cuAddr > 0 && !(m_slice->m_pps->bEntropyCodingSyncEnabled && !(m_cuAddr % m_slice->m_sps->numCuInWidth)))
+            return m_encData->getPicCTU(m_cuAddr - 1)->getLastCodedQP(NUM_4x4_PARTITIONS);
+        else
+            return (int8_t)m_slice->m_sliceQp;
+    }
+}
+
+/* Get allowed chroma intra modes */
+void CUData::getAllowedChromaDir(uint32_t absPartIdx, uint32_t* modeList) const
+{
+    modeList[0] = PLANAR_IDX;
+    modeList[1] = VER_IDX;
+    modeList[2] = HOR_IDX;
+    modeList[3] = DC_IDX;
+    modeList[4] = DM_CHROMA_IDX;
+
+    uint32_t lumaMode = m_lumaIntraDir[absPartIdx];
+
+    for (int i = 0; i < NUM_CHROMA_MODE - 1; i++)
+    {
+        if (lumaMode == modeList[i])
+        {
+            modeList[i] = 34; // VER+8 mode
+            break;
+        }
+    }
+}
+
+/* Get most probable intra modes */
+int CUData::getIntraDirLumaPredictor(uint32_t absPartIdx, uint32_t* intraDirPred) const
+{
+    const CUData* tempCU;
+    uint32_t tempPartIdx;
+    uint32_t leftIntraDir, aboveIntraDir;
+
+    // Get intra direction of left PU
+    tempCU = getPULeft(tempPartIdx, m_absIdxInCTU + absPartIdx);
+
+    leftIntraDir = (tempCU && tempCU->isIntra(tempPartIdx)) ? tempCU->m_lumaIntraDir[tempPartIdx] : DC_IDX;
+
+    // Get intra direction of above PU
+    tempCU = g_zscanToPelY[m_absIdxInCTU + absPartIdx] > 0 ? getPUAbove(tempPartIdx, m_absIdxInCTU + absPartIdx) : NULL;
+
+    aboveIntraDir = (tempCU && tempCU->isIntra(tempPartIdx)) ? tempCU->m_lumaIntraDir[tempPartIdx] : DC_IDX;
+
+    if (leftIntraDir == aboveIntraDir)
+    {
+        if (leftIntraDir >= 2) // angular modes
+        {
+            intraDirPred[0] = leftIntraDir;
+            intraDirPred[1] = ((leftIntraDir - 2 + 31) & 31) + 2;
+            intraDirPred[2] = ((leftIntraDir - 2 +  1) & 31) + 2;
+        }
+        else //non-angular
+        {
+            intraDirPred[0] = PLANAR_IDX;
+            intraDirPred[1] = DC_IDX;
+            intraDirPred[2] = VER_IDX;
+        }
+        return 1;
+    }
+    else
+    {
+        intraDirPred[0] = leftIntraDir;
+        intraDirPred[1] = aboveIntraDir;
+
+        if (leftIntraDir && aboveIntraDir) //both modes are non-planar
+            intraDirPred[2] = PLANAR_IDX;
+        else
+            intraDirPred[2] =  (leftIntraDir + aboveIntraDir) < 2 ? VER_IDX : DC_IDX;
+        return 2;
+    }
+}
+
+uint32_t CUData::getCtxSplitFlag(uint32_t absPartIdx, uint32_t depth) const
+{
+    const CUData* tempCU;
+    uint32_t    tempPartIdx;
+    uint32_t    ctx;
+
+    // Get left split flag
+    tempCU = getPULeft(tempPartIdx, m_absIdxInCTU + absPartIdx);
+    ctx  = (tempCU) ? ((tempCU->m_cuDepth[tempPartIdx] > depth) ? 1 : 0) : 0;
+
+    // Get above split flag
+    tempCU = getPUAbove(tempPartIdx, m_absIdxInCTU + absPartIdx);
+    ctx += (tempCU) ? ((tempCU->m_cuDepth[tempPartIdx] > depth) ? 1 : 0) : 0;
+
+    return ctx;
+}
+
+void CUData::getIntraTUQtDepthRange(uint32_t tuDepthRange[2], uint32_t absPartIdx) const
+{
+    uint32_t log2CUSize = m_log2CUSize[absPartIdx];
+    uint32_t splitFlag = m_partSize[absPartIdx] != SIZE_2Nx2N;
+
+    tuDepthRange[0] = m_slice->m_sps->quadtreeTULog2MinSize;
+    tuDepthRange[1] = m_slice->m_sps->quadtreeTULog2MaxSize;
+
+    tuDepthRange[0] = x265_clip3(tuDepthRange[0], tuDepthRange[1], log2CUSize - (m_slice->m_sps->quadtreeTUMaxDepthIntra - 1 + splitFlag));
+}
+
+void CUData::getInterTUQtDepthRange(uint32_t tuDepthRange[2], uint32_t absPartIdx) const
+{
+    uint32_t log2CUSize = m_log2CUSize[absPartIdx];
+    uint32_t quadtreeTUMaxDepth = m_slice->m_sps->quadtreeTUMaxDepthInter;
+    uint32_t splitFlag = quadtreeTUMaxDepth == 1 && m_partSize[absPartIdx] != SIZE_2Nx2N;
+
+    tuDepthRange[0] = m_slice->m_sps->quadtreeTULog2MinSize;
+    tuDepthRange[1] = m_slice->m_sps->quadtreeTULog2MaxSize;
+
+    tuDepthRange[0] = x265_clip3(tuDepthRange[0], tuDepthRange[1], log2CUSize - (quadtreeTUMaxDepth - 1 + splitFlag));
+}
+
+uint32_t CUData::getCtxSkipFlag(uint32_t absPartIdx) const
+{
+    const CUData* tempCU;
+    uint32_t tempPartIdx;
+    uint32_t ctx;
+
+    // Get BCBP of left PU
+    tempCU = getPULeft(tempPartIdx, m_absIdxInCTU + absPartIdx);
+    ctx    = tempCU ? tempCU->isSkipped(tempPartIdx) : 0;
+
+    // Get BCBP of above PU
+    tempCU = getPUAbove(tempPartIdx, m_absIdxInCTU + absPartIdx);
+    ctx   += tempCU ? tempCU->isSkipped(tempPartIdx) : 0;
+
+    return ctx;
+}
+
+bool CUData::setQPSubCUs(int8_t qp, uint32_t absPartIdx, uint32_t depth)
+{
+    uint32_t curPartNumb = NUM_4x4_PARTITIONS >> (depth << 1);
+    uint32_t curPartNumQ = curPartNumb >> 2;
+
+    if (m_cuDepth[absPartIdx] > depth)
+    {
+        for (uint32_t subPartIdx = 0; subPartIdx < 4; subPartIdx++)
+            if (setQPSubCUs(qp, absPartIdx + subPartIdx * curPartNumQ, depth + 1))
+                return true;
+    }
+    else
+    {
+        if (getQtRootCbf(absPartIdx))
+            return true;
+        else
+            setQPSubParts(qp, absPartIdx, depth);
+    }
+
+    return false;
+}
+
+void CUData::setPUInterDir(uint8_t dir, uint32_t absPartIdx, uint32_t puIdx)
+{
+    uint32_t curPartNumQ = m_numPartitions >> 2;
+    X265_CHECK(puIdx < 2, "unexpected part unit index\n");
+
+    switch (m_partSize[absPartIdx])
+    {
+    case SIZE_2Nx2N:
+        memset(m_interDir + absPartIdx, dir, 4 * curPartNumQ);
+        break;
+    case SIZE_2NxN:
+        memset(m_interDir + absPartIdx, dir, 2 * curPartNumQ);
+        break;
+    case SIZE_Nx2N:
+        memset(m_interDir + absPartIdx, dir, curPartNumQ);
+        memset(m_interDir + absPartIdx + 2 * curPartNumQ, dir, curPartNumQ);
+        break;
+    case SIZE_NxN:
+        memset(m_interDir + absPartIdx, dir, curPartNumQ);
+        break;
+    case SIZE_2NxnU:
+        if (!puIdx)
+        {
+            memset(m_interDir + absPartIdx, dir, (curPartNumQ >> 1));
+            memset(m_interDir + absPartIdx + curPartNumQ, dir, (curPartNumQ >> 1));
+        }
+        else
+        {
+            memset(m_interDir + absPartIdx, dir, (curPartNumQ >> 1));
+            memset(m_interDir + absPartIdx + curPartNumQ, dir, ((curPartNumQ >> 1) + (curPartNumQ << 1)));
+        }
+        break;
+    case SIZE_2NxnD:
+        if (!puIdx)
+        {
+            memset(m_interDir + absPartIdx, dir, ((curPartNumQ << 1) + (curPartNumQ >> 1)));
+            memset(m_interDir + absPartIdx + (curPartNumQ << 1) + curPartNumQ, dir, (curPartNumQ >> 1));
+        }
+        else
+        {
+            memset(m_interDir + absPartIdx, dir, (curPartNumQ >> 1));
+            memset(m_interDir + absPartIdx + curPartNumQ, dir, (curPartNumQ >> 1));
+        }
+        break;
+    case SIZE_nLx2N:
+        if (!puIdx)
+        {
+            memset(m_interDir + absPartIdx, dir, (curPartNumQ >> 2));
+            memset(m_interDir + absPartIdx + (curPartNumQ >> 1), dir, (curPartNumQ >> 2));
+            memset(m_interDir + absPartIdx + (curPartNumQ << 1), dir, (curPartNumQ >> 2));
+            memset(m_interDir + absPartIdx + (curPartNumQ << 1) + (curPartNumQ >> 1), dir, (curPartNumQ >> 2));
+        }
+        else
+        {
+            memset(m_interDir + absPartIdx, dir, (curPartNumQ >> 2));
+            memset(m_interDir + absPartIdx + (curPartNumQ >> 1), dir, (curPartNumQ + (curPartNumQ >> 2)));
+            memset(m_interDir + absPartIdx + (curPartNumQ << 1), dir, (curPartNumQ >> 2));
+            memset(m_interDir + absPartIdx + (curPartNumQ << 1) + (curPartNumQ >> 1), dir, (curPartNumQ + (curPartNumQ >> 2)));
+        }
+        break;
+    case SIZE_nRx2N:
+        if (!puIdx)
+        {
+            memset(m_interDir + absPartIdx, dir, (curPartNumQ + (curPartNumQ >> 2)));
+            memset(m_interDir + absPartIdx + curPartNumQ + (curPartNumQ >> 1), dir, (curPartNumQ >> 2));
+            memset(m_interDir + absPartIdx + (curPartNumQ << 1), dir, (curPartNumQ + (curPartNumQ >> 2)));
+            memset(m_interDir + absPartIdx + (curPartNumQ << 1) + curPartNumQ + (curPartNumQ >> 1), dir, (curPartNumQ >> 2));
+        }
+        else
+        {
+            memset(m_interDir + absPartIdx, dir, (curPartNumQ >> 2));
+            memset(m_interDir + absPartIdx + (curPartNumQ >> 1), dir, (curPartNumQ >> 2));
+            memset(m_interDir + absPartIdx + (curPartNumQ << 1), dir, (curPartNumQ >> 2));
+            memset(m_interDir + absPartIdx + (curPartNumQ << 1) + (curPartNumQ >> 1), dir, (curPartNumQ >> 2));
+        }
+        break;
+    default:
+        X265_CHECK(0, "unexpected part type\n");
+        break;
+    }
+}
+
+template<typename T>
+void CUData::setAllPU(T* p, const T& val, int absPartIdx, int puIdx)
+{
+    int i;
+
+    p += absPartIdx;
+    int numElements = m_numPartitions;
+
+    switch (m_partSize[absPartIdx])
+    {
+    case SIZE_2Nx2N:
+        for (i = 0; i < numElements; i++)
+            p[i] = val;
+        break;
+
+    case SIZE_2NxN:
+        numElements >>= 1;
+        for (i = 0; i < numElements; i++)
+            p[i] = val;
+        break;
+
+    case SIZE_Nx2N:
+        numElements >>= 2;
+        for (i = 0; i < numElements; i++)
+        {
+            p[i] = val;
+            p[i + 2 * numElements] = val;
+        }
+        break;
+
+    case SIZE_2NxnU:
+    {
+        int curPartNumQ = numElements >> 2;
+        if (!puIdx)
+        {
+            T *pT  = p;
+            T *pT2 = p + curPartNumQ;
+            for (i = 0; i < (curPartNumQ >> 1); i++)
+            {
+                pT[i] = val;
+                pT2[i] = val;
+            }
+        }
+        else
+        {
+            T *pT  = p;
+            for (i = 0; i < (curPartNumQ >> 1); i++)
+                pT[i] = val;
+
+            pT = p + curPartNumQ;
+            for (i = 0; i < ((curPartNumQ >> 1) + (curPartNumQ << 1)); i++)
+                pT[i] = val;
+        }
+        break;
+    }
+
+    case SIZE_2NxnD:
+    {
+        int curPartNumQ = numElements >> 2;
+        if (!puIdx)
+        {
+            T *pT  = p;
+            for (i = 0; i < ((curPartNumQ >> 1) + (curPartNumQ << 1)); i++)
+                pT[i] = val;
+
+            pT = p + (numElements - curPartNumQ);
+            for (i = 0; i < (curPartNumQ >> 1); i++)
+                pT[i] = val;
+        }
+        else
+        {
+            T *pT  = p;
+            T *pT2 = p + curPartNumQ;
+            for (i = 0; i < (curPartNumQ >> 1); i++)
+            {
+                pT[i] = val;
+                pT2[i] = val;
+            }
+        }
+        break;
+    }
+
+    case SIZE_nLx2N:
+    {
+        int curPartNumQ = numElements >> 2;
+        if (!puIdx)
+        {
+            T *pT  = p;
+            T *pT2 = p + (curPartNumQ << 1);
+            T *pT3 = p + (curPartNumQ >> 1);
+            T *pT4 = p + (curPartNumQ << 1) + (curPartNumQ >> 1);
+
+            for (i = 0; i < (curPartNumQ >> 2); i++)
+            {
+                pT[i] = val;
+                pT2[i] = val;
+                pT3[i] = val;
+                pT4[i] = val;
+            }
+        }
+        else
+        {
+            T *pT  = p;
+            T *pT2 = p + (curPartNumQ << 1);
+            for (i = 0; i < (curPartNumQ >> 2); i++)
+            {
+                pT[i] = val;
+                pT2[i] = val;
+            }
+
+            pT  = p + (curPartNumQ >> 1);
+            pT2 = p + (curPartNumQ << 1) + (curPartNumQ >> 1);
+            for (i = 0; i < ((curPartNumQ >> 2) + curPartNumQ); i++)
+            {
+                pT[i] = val;
+                pT2[i] = val;
+            }
+        }
+        break;
+    }
+
+    case SIZE_nRx2N:
+    {
+        int curPartNumQ = numElements >> 2;
+        if (!puIdx)
+        {
+            T *pT  = p;
+            T *pT2 = p + (curPartNumQ << 1);
+            for (i = 0; i < ((curPartNumQ >> 2) + curPartNumQ); i++)
+            {
+                pT[i] = val;
+                pT2[i] = val;
+            }
+
+            pT  = p + curPartNumQ + (curPartNumQ >> 1);
+            pT2 = p + numElements - curPartNumQ + (curPartNumQ >> 1);
+            for (i = 0; i < (curPartNumQ >> 2); i++)
+            {
+                pT[i] = val;
+                pT2[i] = val;
+            }
+        }
+        else
+        {
+            T *pT  = p;
+            T *pT2 = p + (curPartNumQ >> 1);
+            T *pT3 = p + (curPartNumQ << 1);
+            T *pT4 = p + (curPartNumQ << 1) + (curPartNumQ >> 1);
+            for (i = 0; i < (curPartNumQ >> 2); i++)
+            {
+                pT[i] = val;
+                pT2[i] = val;
+                pT3[i] = val;
+                pT4[i] = val;
+            }
+        }
+        break;
+    }
+
+    case SIZE_NxN:
+    default:
+        X265_CHECK(0, "unknown partition type\n");
+        break;
+    }
+}
+
+void CUData::setPUMv(int list, const MV& mv, int absPartIdx, int puIdx)
+{
+    setAllPU(m_mv[list], mv, absPartIdx, puIdx);
+}
+
+void CUData::setPURefIdx(int list, int8_t refIdx, int absPartIdx, int puIdx)
+{
+    setAllPU(m_refIdx[list], refIdx, absPartIdx, puIdx);
+}
+
+void CUData::getPartIndexAndSize(uint32_t partIdx, uint32_t& outPartAddr, int& outWidth, int& outHeight) const
+{
+    int cuSize = 1 << m_log2CUSize[0];
+    int partType = m_partSize[0];
+
+    int tmp = partTable[partType][partIdx][0];
+    outWidth = ((tmp >> 4) * cuSize) >> 2;
+    outHeight = ((tmp & 0xF) * cuSize) >> 2;
+    outPartAddr = (partAddrTable[partType][partIdx] * m_numPartitions) >> 4;
+}
+
+void CUData::getMvField(const CUData* cu, uint32_t absPartIdx, int picList, MVField& outMvField) const
+{
+    if (cu)
+    {
+        outMvField.mv = cu->m_mv[picList][absPartIdx];
+        outMvField.refIdx = cu->m_refIdx[picList][absPartIdx];
+    }
+    else
+    {
+        // OUT OF BOUNDARY
+        outMvField.mv = 0;
+        outMvField.refIdx = REF_NOT_VALID;
+    }
+}
+
+void CUData::deriveLeftRightTopIdx(uint32_t partIdx, uint32_t& partIdxLT, uint32_t& partIdxRT) const
+{
+    partIdxLT = m_absIdxInCTU;
+    partIdxRT = g_rasterToZscan[g_zscanToRaster[partIdxLT] + (1 << (m_log2CUSize[0] - LOG2_UNIT_SIZE)) - 1];
+
+    switch (m_partSize[0])
+    {
+    case SIZE_2Nx2N: break;
+    case SIZE_2NxN:
+        partIdxLT += (partIdx == 0) ? 0 : m_numPartitions >> 1;
+        partIdxRT += (partIdx == 0) ? 0 : m_numPartitions >> 1;
+        break;
+    case SIZE_Nx2N:
+        partIdxLT += (partIdx == 0) ? 0 : m_numPartitions >> 2;
+        partIdxRT -= (partIdx == 1) ? 0 : m_numPartitions >> 2;
+        break;
+    case SIZE_NxN:
+        partIdxLT += (m_numPartitions >> 2) * partIdx;
+        partIdxRT +=  (m_numPartitions >> 2) * (partIdx - 1);
+        break;
+    case SIZE_2NxnU:
+        partIdxLT += (partIdx == 0) ? 0 : m_numPartitions >> 3;
+        partIdxRT += (partIdx == 0) ? 0 : m_numPartitions >> 3;
+        break;
+    case SIZE_2NxnD:
+        partIdxLT += (partIdx == 0) ? 0 : (m_numPartitions >> 1) + (m_numPartitions >> 3);
+        partIdxRT += (partIdx == 0) ? 0 : (m_numPartitions >> 1) + (m_numPartitions >> 3);
+        break;
+    case SIZE_nLx2N:
+        partIdxLT += (partIdx == 0) ? 0 : m_numPartitions >> 4;
+        partIdxRT -= (partIdx == 1) ? 0 : (m_numPartitions >> 2) + (m_numPartitions >> 4);
+        break;
+    case SIZE_nRx2N:
+        partIdxLT += (partIdx == 0) ? 0 : (m_numPartitions >> 2) + (m_numPartitions >> 4);
+        partIdxRT -= (partIdx == 1) ? 0 : m_numPartitions >> 4;
+        break;
+    default:
+        X265_CHECK(0, "unexpected part index\n");
+        break;
+    }
+}
+
+uint32_t CUData::deriveLeftBottomIdx(uint32_t puIdx) const
+{
+    uint32_t outPartIdxLB;
+    outPartIdxLB = g_rasterToZscan[g_zscanToRaster[m_absIdxInCTU] + ((1 << (m_log2CUSize[0] - LOG2_UNIT_SIZE - 1)) - 1) * s_numPartInCUSize];
+
+    switch (m_partSize[0])
+    {
+    case SIZE_2Nx2N:
+        outPartIdxLB += m_numPartitions >> 1;
+        break;
+    case SIZE_2NxN:
+        outPartIdxLB += puIdx ? m_numPartitions >> 1 : 0;
+        break;
+    case SIZE_Nx2N:
+        outPartIdxLB += puIdx ? (m_numPartitions >> 2) * 3 : m_numPartitions >> 1;
+        break;
+    case SIZE_NxN:
+        outPartIdxLB += (m_numPartitions >> 2) * puIdx;
+        break;
+    case SIZE_2NxnU:
+        outPartIdxLB += puIdx ? m_numPartitions >> 1 : -((int)m_numPartitions >> 3);
+        break;
+    case SIZE_2NxnD:
+        outPartIdxLB += puIdx ? m_numPartitions >> 1 : (m_numPartitions >> 2) + (m_numPartitions >> 3);
+        break;
+    case SIZE_nLx2N:
+        outPartIdxLB += puIdx ? (m_numPartitions >> 1) + (m_numPartitions >> 4) : m_numPartitions >> 1;
+        break;
+    case SIZE_nRx2N:
+        outPartIdxLB += puIdx ? (m_numPartitions >> 1) + (m_numPartitions >> 2) + (m_numPartitions >> 4) : m_numPartitions >> 1;
+        break;
+    default:
+        X265_CHECK(0, "unexpected part index\n");
+        break;
+    }
+    return outPartIdxLB;
+}
+
+/* Derives the partition index of neighboring bottom right block */
+uint32_t CUData::deriveRightBottomIdx(uint32_t puIdx) const
+{
+    uint32_t outPartIdxRB;
+    outPartIdxRB = g_rasterToZscan[g_zscanToRaster[m_absIdxInCTU] +
+                                   ((1 << (m_log2CUSize[0] - LOG2_UNIT_SIZE - 1)) - 1) * s_numPartInCUSize +
+                                   (1 << (m_log2CUSize[0] - LOG2_UNIT_SIZE)) - 1];
+
+    switch (m_partSize[0])
+    {
+    case SIZE_2Nx2N:
+        outPartIdxRB += m_numPartitions >> 1;
+        break;
+    case SIZE_2NxN:
+        outPartIdxRB += puIdx ? m_numPartitions >> 1 : 0;
+        break;
+    case SIZE_Nx2N:
+        outPartIdxRB += puIdx ? m_numPartitions >> 1 : m_numPartitions >> 2;
+        break;
+    case SIZE_NxN:
+        outPartIdxRB += (m_numPartitions >> 2) * (puIdx - 1);
+        break;
+    case SIZE_2NxnU:
+        outPartIdxRB += puIdx ? m_numPartitions >> 1 : -((int)m_numPartitions >> 3);
+        break;
+    case SIZE_2NxnD:
+        outPartIdxRB += puIdx ? m_numPartitions >> 1 : (m_numPartitions >> 2) + (m_numPartitions >> 3);
+        break;
+    case SIZE_nLx2N:
+        outPartIdxRB += puIdx ? m_numPartitions >> 1 : (m_numPartitions >> 3) + (m_numPartitions >> 4);
+        break;
+    case SIZE_nRx2N:
+        outPartIdxRB += puIdx ? m_numPartitions >> 1 : (m_numPartitions >> 2) + (m_numPartitions >> 3) + (m_numPartitions >> 4);
+        break;
+    default:
+        X265_CHECK(0, "unexpected part index\n");
+        break;
+    }
+    return outPartIdxRB;
+}
+
+bool CUData::hasEqualMotion(uint32_t absPartIdx, const CUData& candCU, uint32_t candAbsPartIdx) const
+{
+    if (m_interDir[absPartIdx] != candCU.m_interDir[candAbsPartIdx])
+        return false;
+
+    for (uint32_t refListIdx = 0; refListIdx < 2; refListIdx++)
+    {
+        if (m_interDir[absPartIdx] & (1 << refListIdx))
+        {
+            if (m_mv[refListIdx][absPartIdx] != candCU.m_mv[refListIdx][candAbsPartIdx] ||
+                m_refIdx[refListIdx][absPartIdx] != candCU.m_refIdx[refListIdx][candAbsPartIdx])
+                return false;
+        }
+    }
+
+    return true;
+}
+
+/* Construct list of merging candidates, returns count */
+uint32_t CUData::getInterMergeCandidates(uint32_t absPartIdx, uint32_t puIdx, MVField(*candMvField)[2], uint8_t* candDir) const
+{
+    uint32_t absPartAddr = m_absIdxInCTU + absPartIdx;
+    const bool isInterB = m_slice->isInterB();
+
+    const uint32_t maxNumMergeCand = m_slice->m_maxNumMergeCand;
+
+    for (uint32_t i = 0; i < maxNumMergeCand; ++i)
+    {
+        candMvField[i][0].mv = 0;
+        candMvField[i][1].mv = 0;
+        candMvField[i][0].refIdx = REF_NOT_VALID;
+        candMvField[i][1].refIdx = REF_NOT_VALID;
+    }
+
+    /* calculate the location of upper-left corner pixel and size of the current PU */
+    int xP, yP, nPSW, nPSH;
+
+    int cuSize = 1 << m_log2CUSize[0];
+    int partMode = m_partSize[0];
+
+    int tmp = partTable[partMode][puIdx][0];
+    nPSW = ((tmp >> 4) * cuSize) >> 2;
+    nPSH = ((tmp & 0xF) * cuSize) >> 2;
+
+    tmp = partTable[partMode][puIdx][1];
+    xP = ((tmp >> 4) * cuSize) >> 2;
+    yP = ((tmp & 0xF) * cuSize) >> 2;
+
+    uint32_t count = 0;
+
+    uint32_t partIdxLT, partIdxRT, partIdxLB = deriveLeftBottomIdx(puIdx);
+    PartSize curPS = (PartSize)m_partSize[absPartIdx];
+    
+    // left
+    uint32_t leftPartIdx = 0;
+    const CUData* cuLeft = getPULeft(leftPartIdx, partIdxLB);
+    bool isAvailableA1 = cuLeft &&
+        cuLeft->isDiffMER(xP - 1, yP + nPSH - 1, xP, yP) &&
+        !(puIdx == 1 && (curPS == SIZE_Nx2N || curPS == SIZE_nLx2N || curPS == SIZE_nRx2N)) &&
+        cuLeft->isInter(leftPartIdx);
+    if (isAvailableA1)
+    {
+        // get Inter Dir
+        candDir[count] = cuLeft->m_interDir[leftPartIdx];
+        // get Mv from Left
+        cuLeft->getMvField(cuLeft, leftPartIdx, 0, candMvField[count][0]);
+        if (isInterB)
+            cuLeft->getMvField(cuLeft, leftPartIdx, 1, candMvField[count][1]);
+
+        if (++count == maxNumMergeCand)
+            return maxNumMergeCand;
+    }
+
+    deriveLeftRightTopIdx(puIdx, partIdxLT, partIdxRT);
+
+    // above
+    uint32_t abovePartIdx = 0;
+    const CUData* cuAbove = getPUAbove(abovePartIdx, partIdxRT);
+    bool isAvailableB1 = cuAbove &&
+        cuAbove->isDiffMER(xP + nPSW - 1, yP - 1, xP, yP) &&
+        !(puIdx == 1 && (curPS == SIZE_2NxN || curPS == SIZE_2NxnU || curPS == SIZE_2NxnD)) &&
+        cuAbove->isInter(abovePartIdx);
+    if (isAvailableB1 && (!isAvailableA1 || !cuLeft->hasEqualMotion(leftPartIdx, *cuAbove, abovePartIdx)))
+    {
+        // get Inter Dir
+        candDir[count] = cuAbove->m_interDir[abovePartIdx];
+        // get Mv from Left
+        cuAbove->getMvField(cuAbove, abovePartIdx, 0, candMvField[count][0]);
+        if (isInterB)
+            cuAbove->getMvField(cuAbove, abovePartIdx, 1, candMvField[count][1]);
+
+        if (++count == maxNumMergeCand)
+            return maxNumMergeCand;
+    }
+
+    // above right
+    uint32_t aboveRightPartIdx = 0;
+    const CUData* cuAboveRight = getPUAboveRight(aboveRightPartIdx, partIdxRT);
+    bool isAvailableB0 = cuAboveRight &&
+        cuAboveRight->isDiffMER(xP + nPSW, yP - 1, xP, yP) &&
+        cuAboveRight->isInter(aboveRightPartIdx);
+    if (isAvailableB0 && (!isAvailableB1 || !cuAbove->hasEqualMotion(abovePartIdx, *cuAboveRight, aboveRightPartIdx)))
+    {
+        // get Inter Dir
+        candDir[count] = cuAboveRight->m_interDir[aboveRightPartIdx];
+        // get Mv from Left
+        cuAboveRight->getMvField(cuAboveRight, aboveRightPartIdx, 0, candMvField[count][0]);
+        if (isInterB)
+            cuAboveRight->getMvField(cuAboveRight, aboveRightPartIdx, 1, candMvField[count][1]);
+
+        if (++count == maxNumMergeCand)
+            return maxNumMergeCand;
+    }
+
+    // left bottom
+    uint32_t leftBottomPartIdx = 0;
+    const CUData* cuLeftBottom = this->getPUBelowLeft(leftBottomPartIdx, partIdxLB);
+    bool isAvailableA0 = cuLeftBottom &&
+        cuLeftBottom->isDiffMER(xP - 1, yP + nPSH, xP, yP) &&
+        cuLeftBottom->isInter(leftBottomPartIdx);
+    if (isAvailableA0 && (!isAvailableA1 || !cuLeft->hasEqualMotion(leftPartIdx, *cuLeftBottom, leftBottomPartIdx)))
+    {
+        // get Inter Dir
+        candDir[count] = cuLeftBottom->m_interDir[leftBottomPartIdx];
+        // get Mv from Left
+        cuLeftBottom->getMvField(cuLeftBottom, leftBottomPartIdx, 0, candMvField[count][0]);
+        if (isInterB)
+            cuLeftBottom->getMvField(cuLeftBottom, leftBottomPartIdx, 1, candMvField[count][1]);
+
+        if (++count == maxNumMergeCand)
+            return maxNumMergeCand;
+    }
+
+    // above left
+    if (count < 4)
+    {
+        uint32_t aboveLeftPartIdx = 0;
+        const CUData* cuAboveLeft = getPUAboveLeft(aboveLeftPartIdx, absPartAddr);
+        bool isAvailableB2 = cuAboveLeft &&
+            cuAboveLeft->isDiffMER(xP - 1, yP - 1, xP, yP) &&
+            cuAboveLeft->isInter(aboveLeftPartIdx);
+        if (isAvailableB2 && (!isAvailableA1 || !cuLeft->hasEqualMotion(leftPartIdx, *cuAboveLeft, aboveLeftPartIdx))
+            && (!isAvailableB1 || !cuAbove->hasEqualMotion(abovePartIdx, *cuAboveLeft, aboveLeftPartIdx)))
+        {
+            // get Inter Dir
+            candDir[count] = cuAboveLeft->m_interDir[aboveLeftPartIdx];
+            // get Mv from Left
+            cuAboveLeft->getMvField(cuAboveLeft, aboveLeftPartIdx, 0, candMvField[count][0]);
+            if (isInterB)
+                cuAboveLeft->getMvField(cuAboveLeft, aboveLeftPartIdx, 1, candMvField[count][1]);
+
+            if (++count == maxNumMergeCand)
+                return maxNumMergeCand;
+        }
+    }
+    if (m_slice->m_sps->bTemporalMVPEnabled)
+    {
+        uint32_t partIdxRB = deriveRightBottomIdx(puIdx);
+        MV colmv;
+        int ctuIdx = -1;
+
+        // image boundary check
+        if (m_encData->getPicCTU(m_cuAddr)->m_cuPelX + g_zscanToPelX[partIdxRB] + UNIT_SIZE < m_slice->m_sps->picWidthInLumaSamples &&
+            m_encData->getPicCTU(m_cuAddr)->m_cuPelY + g_zscanToPelY[partIdxRB] + UNIT_SIZE < m_slice->m_sps->picHeightInLumaSamples)
+        {
+            uint32_t absPartIdxRB = g_zscanToRaster[partIdxRB];
+            uint32_t numUnits = s_numPartInCUSize;
+            bool bNotLastCol = lessThanCol(absPartIdxRB, numUnits - 1, numUnits); // is not at the last column of CTU
+            bool bNotLastRow = lessThanRow(absPartIdxRB, numUnits - 1, numUnits); // is not at the last row    of CTU
+
+            if (bNotLastCol && bNotLastRow)
+            {
+                absPartAddr = g_rasterToZscan[absPartIdxRB + numUnits + 1];
+                ctuIdx = m_cuAddr;
+            }
+            else if (bNotLastCol)
+                absPartAddr = g_rasterToZscan[(absPartIdxRB + numUnits + 1) & (numUnits - 1)];
+            else if (bNotLastRow)
+            {
+                absPartAddr = g_rasterToZscan[absPartIdxRB + 1];
+                ctuIdx = m_cuAddr + 1;
+            }
+            else // is the right bottom corner of CTU
+                absPartAddr = 0;
+        }
+
+        int maxList = isInterB ? 2 : 1;
+        int dir = 0, refIdx = 0;
+        for (int list = 0; list < maxList; list++)
+        {
+            bool bExistMV = ctuIdx >= 0 && getColMVP(colmv, refIdx, list, ctuIdx, absPartAddr);
+            if (!bExistMV)
+            {
+                uint32_t partIdxCenter = deriveCenterIdx(puIdx);
+                bExistMV = getColMVP(colmv, refIdx, list, m_cuAddr, partIdxCenter);
+            }
+            if (bExistMV)
+            {
+                dir |= (1 << list);
+                candMvField[count][list].mv = colmv;
+                candMvField[count][list].refIdx = refIdx;
+            }
+        }
+
+        if (dir != 0)
+        {
+            candDir[count] = (uint8_t)dir;
+
+            if (++count == maxNumMergeCand)
+                return maxNumMergeCand;
+        }
+    }
+
+    if (isInterB)
+    {
+        const uint32_t cutoff = count * (count - 1);
+        uint32_t priorityList0 = 0xEDC984; // { 0, 1, 0, 2, 1, 2, 0, 3, 1, 3, 2, 3 }
+        uint32_t priorityList1 = 0xB73621; // { 1, 0, 2, 0, 2, 1, 3, 0, 3, 1, 3, 2 }
+
+        for (uint32_t idx = 0; idx < cutoff; idx++, priorityList0 >>= 2, priorityList1 >>= 2)
+        {
+            int i = priorityList0 & 3;
+            int j = priorityList1 & 3;
+
+            if ((candDir[i] & 0x1) && (candDir[j] & 0x2))
+            {
+                // get Mv from cand[i] and cand[j]
+                int refIdxL0 = candMvField[i][0].refIdx;
+                int refIdxL1 = candMvField[j][1].refIdx;
+                int refPOCL0 = m_slice->m_refPOCList[0][refIdxL0];
+                int refPOCL1 = m_slice->m_refPOCList[1][refIdxL1];
+                if (!(refPOCL0 == refPOCL1 && candMvField[i][0].mv == candMvField[j][1].mv))
+                {
+                    candMvField[count][0].mv = candMvField[i][0].mv;
+                    candMvField[count][0].refIdx = refIdxL0;
+                    candMvField[count][1].mv = candMvField[j][1].mv;
+                    candMvField[count][1].refIdx = refIdxL1;
+                    candDir[count] = 3;
+
+                    if (++count == maxNumMergeCand)
+                        return maxNumMergeCand;
+                }
+            }
+        }
+    }
+    int numRefIdx = (isInterB) ? X265_MIN(m_slice->m_numRefIdx[0], m_slice->m_numRefIdx[1]) : m_slice->m_numRefIdx[0];
+    int r = 0;
+    int refcnt = 0;
+    while (count < maxNumMergeCand)
+    {
+        candDir[count] = 1;
+        candMvField[count][0].mv.word = 0;
+        candMvField[count][0].refIdx = r;
+
+        if (isInterB)
+        {
+            candDir[count] = 3;
+            candMvField[count][1].mv.word = 0;
+            candMvField[count][1].refIdx = r;
+        }
+
+        count++;
+
+        if (refcnt == numRefIdx - 1)
+            r = 0;
+        else
+        {
+            ++r;
+            ++refcnt;
+        }
+    }
+
+    return count;
+}
+
+// Create the PMV list. Called for each reference index.
+int CUData::getPMV(InterNeighbourMV *neighbours, uint32_t picList, uint32_t refIdx, MV* amvpCand, MV* pmv) const
+{
+    MV directMV[MD_ABOVE_LEFT + 1];
+    MV indirectMV[MD_ABOVE_LEFT + 1];
+    bool validDirect[MD_ABOVE_LEFT + 1];
+    bool validIndirect[MD_ABOVE_LEFT + 1];
+
+    // Left candidate.
+    validDirect[MD_BELOW_LEFT]  = getDirectPMV(directMV[MD_BELOW_LEFT], neighbours + MD_BELOW_LEFT, picList, refIdx);
+    validDirect[MD_LEFT]        = getDirectPMV(directMV[MD_LEFT], neighbours + MD_LEFT, picList, refIdx);
+    // Top candidate.
+    validDirect[MD_ABOVE_RIGHT] = getDirectPMV(directMV[MD_ABOVE_RIGHT], neighbours + MD_ABOVE_RIGHT, picList, refIdx);
+    validDirect[MD_ABOVE]       = getDirectPMV(directMV[MD_ABOVE], neighbours + MD_ABOVE, picList, refIdx);
+    validDirect[MD_ABOVE_LEFT]  = getDirectPMV(directMV[MD_ABOVE_LEFT], neighbours + MD_ABOVE_LEFT, picList, refIdx);
+
+    // Left candidate.
+    validIndirect[MD_BELOW_LEFT]  = getIndirectPMV(indirectMV[MD_BELOW_LEFT], neighbours + MD_BELOW_LEFT, picList, refIdx);
+    validIndirect[MD_LEFT]        = getIndirectPMV(indirectMV[MD_LEFT], neighbours + MD_LEFT, picList, refIdx);
+    // Top candidate.
+    validIndirect[MD_ABOVE_RIGHT] = getIndirectPMV(indirectMV[MD_ABOVE_RIGHT], neighbours + MD_ABOVE_RIGHT, picList, refIdx);
+    validIndirect[MD_ABOVE]       = getIndirectPMV(indirectMV[MD_ABOVE], neighbours + MD_ABOVE, picList, refIdx);
+    validIndirect[MD_ABOVE_LEFT]  = getIndirectPMV(indirectMV[MD_ABOVE_LEFT], neighbours + MD_ABOVE_LEFT, picList, refIdx);
+
+    int num = 0;
+    // Left predictor search
+    if (validDirect[MD_BELOW_LEFT])
+        amvpCand[num++] = directMV[MD_BELOW_LEFT];
+    else if (validDirect[MD_LEFT])
+        amvpCand[num++] = directMV[MD_LEFT];
+    else if (validIndirect[MD_BELOW_LEFT])
+        amvpCand[num++] = indirectMV[MD_BELOW_LEFT];
+    else if (validIndirect[MD_LEFT])
+        amvpCand[num++] = indirectMV[MD_LEFT];
+
+    bool bAddedSmvp = num > 0;
+
+    // Above predictor search
+    if (validDirect[MD_ABOVE_RIGHT])
+        amvpCand[num++] = directMV[MD_ABOVE_RIGHT];
+    else if (validDirect[MD_ABOVE])
+        amvpCand[num++] = directMV[MD_ABOVE];
+    else if (validDirect[MD_ABOVE_LEFT])
+        amvpCand[num++] = directMV[MD_ABOVE_LEFT];
+
+    if (!bAddedSmvp)
+    {
+        if (validIndirect[MD_ABOVE_RIGHT])
+            amvpCand[num++] = indirectMV[MD_ABOVE_RIGHT];
+        else if (validIndirect[MD_ABOVE])
+            amvpCand[num++] = indirectMV[MD_ABOVE];
+        else if (validIndirect[MD_ABOVE_LEFT])
+            amvpCand[num++] = indirectMV[MD_ABOVE_LEFT];
+    }
+
+    int numMvc = 0;
+    for (int dir = MD_LEFT; dir <= MD_ABOVE_LEFT; dir++)
+    {
+        if (validDirect[dir] && directMV[dir].notZero())
+            pmv[numMvc++] = directMV[dir];
+
+        if (validIndirect[dir] && indirectMV[dir].notZero())
+            pmv[numMvc++] = indirectMV[dir];
+    }
+
+    if (num == 2)
+        num -= amvpCand[0] == amvpCand[1];
+
+    // Get the collocated candidate. At this step, either the first candidate
+    // was found or its value is 0.
+    if (m_slice->m_sps->bTemporalMVPEnabled && num < 2)
+    {
+        int tempRefIdx = neighbours[MD_COLLOCATED].refIdx[picList];
+        if (tempRefIdx != -1)
+        {
+            uint32_t cuAddr = neighbours[MD_COLLOCATED].cuAddr[picList];
+            const Frame* colPic = m_slice->m_refFrameList[m_slice->isInterB() && !m_slice->m_colFromL0Flag][m_slice->m_colRefIdx];
+            const CUData* colCU = colPic->m_encData->getPicCTU(cuAddr);
+
+            // Scale the vector
+            int colRefPOC = colCU->m_slice->m_refPOCList[tempRefIdx >> 4][tempRefIdx & 0xf];
+            int colPOC = colCU->m_slice->m_poc;
+
+            int curRefPOC = m_slice->m_refPOCList[picList][refIdx];
+            int curPOC = m_slice->m_poc;
+
+            pmv[numMvc++] = amvpCand[num++] = scaleMvByPOCDist(neighbours[MD_COLLOCATED].mv[picList], curPOC, curRefPOC, colPOC, colRefPOC);
+        }
+    }
+
+    while (num < AMVP_NUM_CANDS)
+        amvpCand[num++] = 0;
+
+    return numMvc;
+}
+
+/* Constructs a list of candidates for AMVP, and a larger list of motion candidates */
+void CUData::getNeighbourMV(uint32_t puIdx, uint32_t absPartIdx, InterNeighbourMV* neighbours) const
+{
+    // Set the temporal neighbour to unavailable by default.
+    neighbours[MD_COLLOCATED].unifiedRef = -1;
+
+    uint32_t partIdxLT, partIdxRT, partIdxLB = deriveLeftBottomIdx(puIdx);
+    deriveLeftRightTopIdx(puIdx, partIdxLT, partIdxRT);
+
+    // Load the spatial MVs.
+    getInterNeighbourMV(neighbours + MD_BELOW_LEFT, partIdxLB, MD_BELOW_LEFT);
+    getInterNeighbourMV(neighbours + MD_LEFT,       partIdxLB, MD_LEFT);
+    getInterNeighbourMV(neighbours + MD_ABOVE_RIGHT,partIdxRT, MD_ABOVE_RIGHT);
+    getInterNeighbourMV(neighbours + MD_ABOVE,      partIdxRT, MD_ABOVE);
+    getInterNeighbourMV(neighbours + MD_ABOVE_LEFT, partIdxLT, MD_ABOVE_LEFT);
+
+    if (m_slice->m_sps->bTemporalMVPEnabled)
+    {
+        uint32_t absPartAddr = m_absIdxInCTU + absPartIdx;
+        uint32_t partIdxRB = deriveRightBottomIdx(puIdx);
+
+        // co-located RightBottom temporal predictor (H)
+        int ctuIdx = -1;
+
+        // image boundary check
+        if (m_encData->getPicCTU(m_cuAddr)->m_cuPelX + g_zscanToPelX[partIdxRB] + UNIT_SIZE < m_slice->m_sps->picWidthInLumaSamples &&
+            m_encData->getPicCTU(m_cuAddr)->m_cuPelY + g_zscanToPelY[partIdxRB] + UNIT_SIZE < m_slice->m_sps->picHeightInLumaSamples)
+        {
+            uint32_t absPartIdxRB = g_zscanToRaster[partIdxRB];
+            uint32_t numUnits = s_numPartInCUSize;
+            bool bNotLastCol = lessThanCol(absPartIdxRB, numUnits - 1, numUnits); // is not at the last column of CTU
+            bool bNotLastRow = lessThanRow(absPartIdxRB, numUnits - 1, numUnits); // is not at the last row    of CTU
+
+            if (bNotLastCol && bNotLastRow)
+            {
+                absPartAddr = g_rasterToZscan[absPartIdxRB + numUnits + 1];
+                ctuIdx = m_cuAddr;
+            }
+            else if (bNotLastCol)
+                absPartAddr = g_rasterToZscan[(absPartIdxRB + numUnits + 1) & (numUnits - 1)];
+            else if (bNotLastRow)
+            {
+                absPartAddr = g_rasterToZscan[absPartIdxRB + 1];
+                ctuIdx = m_cuAddr + 1;
+            }
+            else // is the right bottom corner of CTU
+                absPartAddr = 0;
+        }
+
+        if (!(ctuIdx >= 0 && getCollocatedMV(ctuIdx, absPartAddr, neighbours + MD_COLLOCATED)))
+        {
+            uint32_t partIdxCenter =  deriveCenterIdx(puIdx);
+            uint32_t curCTUIdx = m_cuAddr;
+            getCollocatedMV(curCTUIdx, partIdxCenter, neighbours + MD_COLLOCATED);
+        }
+    }
+}
+
+void CUData::getInterNeighbourMV(InterNeighbourMV *neighbour, uint32_t partUnitIdx, MVP_DIR dir) const
+{
+    const CUData* tmpCU = NULL;
+    uint32_t idx = 0;
+
+    switch (dir)
+    {
+    case MD_LEFT:
+        tmpCU = getPULeft(idx, partUnitIdx);
+        break;
+    case MD_ABOVE:
+        tmpCU = getPUAbove(idx, partUnitIdx);
+        break;
+    case MD_ABOVE_RIGHT:
+        tmpCU = getPUAboveRight(idx, partUnitIdx);
+        break;
+    case MD_BELOW_LEFT:
+        tmpCU = getPUBelowLeft(idx, partUnitIdx);
+        break;
+    case MD_ABOVE_LEFT:
+        tmpCU = getPUAboveLeft(idx, partUnitIdx);
+        break;
+    default:
+        break;
+    }
+
+    if (!tmpCU)
+    {
+        // Mark the PMV as unavailable.
+        for (int i = 0; i < 2; i++)
+            neighbour->refIdx[i] = -1;
+        return;
+    }
+
+    for (int i = 0; i < 2; i++)
+    {
+        // Get the MV.
+        neighbour->mv[i] = tmpCU->m_mv[i][idx];
+
+        // Get the reference idx.
+        neighbour->refIdx[i] = tmpCU->m_refIdx[i][idx];
+    }
+}
+
+/* Clip motion vector to within slightly padded boundary of picture (the
+ * MV may reference a block that is completely within the padded area).
+ * Note this function is unaware of how much of this picture is actually
+ * available for use (re: frame parallelism) */
+void CUData::clipMv(MV& outMV) const
+{
+    const uint32_t mvshift = 2;
+    uint32_t offset = 8;
+
+    int16_t xmax = (int16_t)((m_slice->m_sps->picWidthInLumaSamples + offset - m_cuPelX - 1) << mvshift);
+    int16_t xmin = -(int16_t)((g_maxCUSize + offset + m_cuPelX - 1) << mvshift);
+
+    int16_t ymax = (int16_t)((m_slice->m_sps->picHeightInLumaSamples + offset - m_cuPelY - 1) << mvshift);
+    int16_t ymin = -(int16_t)((g_maxCUSize + offset + m_cuPelY - 1) << mvshift);
+
+    outMV.x = X265_MIN(xmax, X265_MAX(xmin, outMV.x));
+    outMV.y = X265_MIN(ymax, X265_MAX(ymin, outMV.y));
+}
+
+// Load direct spatial MV if available.
+bool CUData::getDirectPMV(MV& pmv, InterNeighbourMV *neighbours, uint32_t picList, uint32_t refIdx) const
+{
+    int curRefPOC = m_slice->m_refPOCList[picList][refIdx];
+    for (int i = 0; i < 2; i++, picList = !picList)
+    {
+        int partRefIdx = neighbours->refIdx[picList];
+        if (partRefIdx >= 0 && curRefPOC == m_slice->m_refPOCList[picList][partRefIdx])
+        {
+            pmv = neighbours->mv[picList];
+            return true;
+        }
+    }
+    return false;
+}
+
+// Load indirect spatial MV if available. An indirect MV has to be scaled.
+bool CUData::getIndirectPMV(MV& outMV, InterNeighbourMV *neighbours, uint32_t picList, uint32_t refIdx) const
+{
+    int curPOC = m_slice->m_poc;
+    int neibPOC = curPOC;
+    int curRefPOC = m_slice->m_refPOCList[picList][refIdx];
+
+    for (int i = 0; i < 2; i++, picList = !picList)
+    {
+        int partRefIdx = neighbours->refIdx[picList];
+        if (partRefIdx >= 0)
+        {
+            int neibRefPOC = m_slice->m_refPOCList[picList][partRefIdx];
+            MV mvp = neighbours->mv[picList];
+
+            outMV = scaleMvByPOCDist(mvp, curPOC, curRefPOC, neibPOC, neibRefPOC);
+            return true;
+        }
+    }
+    return false;
+}
+
+bool CUData::getColMVP(MV& outMV, int& outRefIdx, int picList, int cuAddr, int partUnitIdx) const
+{
+    const Frame* colPic = m_slice->m_refFrameList[m_slice->isInterB() && !m_slice->m_colFromL0Flag][m_slice->m_colRefIdx];
+    const CUData* colCU = colPic->m_encData->getPicCTU(cuAddr);
+
+    uint32_t absPartAddr = partUnitIdx & TMVP_UNIT_MASK;
+    if (colCU->m_predMode[partUnitIdx] == MODE_NONE || colCU->isIntra(absPartAddr))
+        return false;
+
+    int colRefPicList = m_slice->m_bCheckLDC ? picList : m_slice->m_colFromL0Flag;
+
+    int colRefIdx = colCU->m_refIdx[colRefPicList][absPartAddr];
+
+    if (colRefIdx < 0)
+    {
+        colRefPicList = !colRefPicList;
+        colRefIdx = colCU->m_refIdx[colRefPicList][absPartAddr];
+
+        if (colRefIdx < 0)
+            return false;
+    }
+
+    // Scale the vector
+    int colRefPOC = colCU->m_slice->m_refPOCList[colRefPicList][colRefIdx];
+    int colPOC = colCU->m_slice->m_poc;
+    MV colmv = colCU->m_mv[colRefPicList][absPartAddr];
+
+    int curRefPOC = m_slice->m_refPOCList[picList][outRefIdx];
+    int curPOC = m_slice->m_poc;
+
+    outMV = scaleMvByPOCDist(colmv, curPOC, curRefPOC, colPOC, colRefPOC);
+    return true;
+}
+
+// Cache the collocated MV.
+bool CUData::getCollocatedMV(int cuAddr, int partUnitIdx, InterNeighbourMV *neighbour) const
+{
+    const Frame* colPic = m_slice->m_refFrameList[m_slice->isInterB() && !m_slice->m_colFromL0Flag][m_slice->m_colRefIdx];
+    const CUData* colCU = colPic->m_encData->getPicCTU(cuAddr);
+
+    uint32_t absPartAddr = partUnitIdx & TMVP_UNIT_MASK;
+    if (colCU->m_predMode[partUnitIdx] == MODE_NONE || colCU->isIntra(absPartAddr))
+        return false;
+
+    for (int list = 0; list < 2; list++)
+    {
+        neighbour->cuAddr[list] = cuAddr;
+        int colRefPicList = m_slice->m_bCheckLDC ? list : m_slice->m_colFromL0Flag;
+        int colRefIdx = colCU->m_refIdx[colRefPicList][absPartAddr];
+
+        if (colRefIdx < 0)
+            colRefPicList = !colRefPicList;
+
+        neighbour->refIdx[list] = colCU->m_refIdx[colRefPicList][absPartAddr];
+        neighbour->refIdx[list] |= colRefPicList << 4;
+
+        neighbour->mv[list] = colCU->m_mv[colRefPicList][absPartAddr];
+    }
+
+    return neighbour->unifiedRef != -1;
+}
+
+MV CUData::scaleMvByPOCDist(const MV& inMV, int curPOC, int curRefPOC, int colPOC, int colRefPOC) const
+{
+    int diffPocD = colPOC - colRefPOC;
+    int diffPocB = curPOC - curRefPOC;
+
+    if (diffPocD == diffPocB)
+        return inMV;
+    else
+    {
+        int tdb   = x265_clip3(-128, 127, diffPocB);
+        int tdd   = x265_clip3(-128, 127, diffPocD);
+        int x     = (0x4000 + abs(tdd / 2)) / tdd;
+        int scale = x265_clip3(-4096, 4095, (tdb * x + 32) >> 6);
+        return scaleMv(inMV, scale);
+    }
+}
+
+uint32_t CUData::deriveCenterIdx(uint32_t puIdx) const
+{
+    uint32_t absPartIdx;
+    int puWidth, puHeight;
+
+    getPartIndexAndSize(puIdx, absPartIdx, puWidth, puHeight);
+
+    return g_rasterToZscan[g_zscanToRaster[m_absIdxInCTU + absPartIdx]
+                           + (puHeight >> (LOG2_UNIT_SIZE + 1)) * s_numPartInCUSize
+                           + (puWidth  >> (LOG2_UNIT_SIZE + 1))];
+}
+
+void CUData::getTUEntropyCodingParameters(TUEntropyCodingParameters &result, uint32_t absPartIdx, uint32_t log2TrSize, bool bIsLuma) const
+{
+    bool bIsIntra = isIntra(absPartIdx);
+
+    // set the group layout
+    result.log2TrSizeCG = log2TrSize - 2;
+
+    // set the scan orders
+    if (bIsIntra)
+    {
+        uint32_t dirMode;
+
+        if (bIsLuma)
+            dirMode = m_lumaIntraDir[absPartIdx];
+        else
+        {
+            dirMode = m_chromaIntraDir[absPartIdx];
+            if (dirMode == DM_CHROMA_IDX)
+            {
+                dirMode = m_lumaIntraDir[(m_chromaFormat == X265_CSP_I444) ? absPartIdx : absPartIdx & 0xFC];
+                dirMode = (m_chromaFormat == X265_CSP_I422) ? g_chroma422IntraAngleMappingTable[dirMode] : dirMode;
+            }
+        }
+
+        if (log2TrSize <= (MDCS_LOG2_MAX_SIZE - m_hChromaShift) || (bIsLuma && log2TrSize == MDCS_LOG2_MAX_SIZE))
+            result.scanType = dirMode >= 22 && dirMode <= 30 ? SCAN_HOR : dirMode >= 6 && dirMode <= 14 ? SCAN_VER : SCAN_DIAG;
+        else
+            result.scanType = SCAN_DIAG;
+    }
+    else
+        result.scanType = SCAN_DIAG;
+
+    result.scan     = g_scanOrder[result.scanType][log2TrSize - 2];
+    result.scanCG   = g_scanOrderCG[result.scanType][result.log2TrSizeCG];
+
+    if (log2TrSize == 2)
+        result.firstSignificanceMapContext = 0;
+    else if (log2TrSize == 3)
+        result.firstSignificanceMapContext = (result.scanType != SCAN_DIAG && bIsLuma) ? 15 : 9;
+    else
+        result.firstSignificanceMapContext = bIsLuma ? 21 : 12;
+}
+
+#define CU_SET_FLAG(bitfield, flag, value) (bitfield) = ((bitfield) & (~(flag))) | ((~((value) - 1)) & (flag))
+
+void CUData::calcCTUGeoms(uint32_t ctuWidth, uint32_t ctuHeight, uint32_t maxCUSize, uint32_t minCUSize, CUGeom cuDataArray[CUGeom::MAX_GEOMS])
+{
+    // Initialize the coding blocks inside the CTB
+    for (uint32_t log2CUSize = g_log2Size[maxCUSize], rangeCUIdx = 0; log2CUSize >= g_log2Size[minCUSize]; log2CUSize--)
+    {
+        uint32_t blockSize = 1 << log2CUSize;
+        uint32_t sbWidth   = 1 << (g_log2Size[maxCUSize] - log2CUSize);
+        int32_t lastLevelFlag = log2CUSize == g_log2Size[minCUSize];
+
+        for (uint32_t sbY = 0; sbY < sbWidth; sbY++)
+        {
+            for (uint32_t sbX = 0; sbX < sbWidth; sbX++)
+            {
+                uint32_t depthIdx = g_depthScanIdx[sbY][sbX];
+                uint32_t cuIdx = rangeCUIdx + depthIdx;
+                uint32_t childIdx = rangeCUIdx + sbWidth * sbWidth + (depthIdx << 2);
+                uint32_t px = sbX * blockSize;
+                uint32_t py = sbY * blockSize;
+                int32_t presentFlag = px < ctuWidth && py < ctuHeight;
+                int32_t splitMandatoryFlag = presentFlag && !lastLevelFlag && (px + blockSize > ctuWidth || py + blockSize > ctuHeight);
+                
+                /* Offset of the luma CU in the X, Y direction in terms of pixels from the CTU origin */
+                uint32_t xOffset = (sbX * blockSize) >> 3;
+                uint32_t yOffset = (sbY * blockSize) >> 3;
+                X265_CHECK(cuIdx < CUGeom::MAX_GEOMS, "CU geom index bug\n");
+
+                CUGeom *cu = cuDataArray + cuIdx;
+                cu->log2CUSize = log2CUSize;
+                cu->childOffset = childIdx - cuIdx;
+                cu->absPartIdx = g_depthScanIdx[yOffset][xOffset] * 4;
+                cu->numPartitions = (NUM_4x4_PARTITIONS >> ((g_maxLog2CUSize - cu->log2CUSize) * 2));
+                cu->depth = g_log2Size[maxCUSize] - log2CUSize;
+
+                cu->flags = 0;
+                CU_SET_FLAG(cu->flags, CUGeom::PRESENT, presentFlag);
+                CU_SET_FLAG(cu->flags, CUGeom::SPLIT_MANDATORY | CUGeom::SPLIT, splitMandatoryFlag);
+                CU_SET_FLAG(cu->flags, CUGeom::LEAF, lastLevelFlag);
+            }
+        }
+        rangeCUIdx += sbWidth * sbWidth;
+    }
+}