[x265] [PATCH] aq: implementation of fine-grained adaptive quantization

gopu at multicorewareinc.com gopu at multicorewareinc.com
Mon Mar 23 09:53:53 CET 2015


# HG changeset patch
# User Gopu Govindaswamy <gopu at multicorewareinc.com>
# Date 1427100822 -19800
#      Mon Mar 23 14:23:42 2015 +0530
# Node ID 02f1b991ed9d4d30ad6ec7a4eefca94d5347ceaa
# Parent  cc496665280f9e9e4776327e9a1cc1b2eeffecbc
aq: implementation of fine-grained adaptive quantization

Currently adaptive quantization adjusts the QP values on 64x64 pixel CodingTree
units (CTUs) across a video frame. the new param option --max-dqp-depth will
enable quantization parameter (QP) to be adjusted to individual quantization
groups (QGs)

diff -r cc496665280f -r 02f1b991ed9d source/common/cudata.cpp
--- a/source/common/cudata.cpp	Sun Mar 22 22:16:45 2015 -0400
+++ b/source/common/cudata.cpp	Mon Mar 23 14:23:42 2015 +0530
@@ -298,7 +298,7 @@
 }
 
 // initialize Sub partition
-void CUData::initSubCU(const CUData& ctu, const CUGeom& cuGeom)
+void CUData::initSubCU(const CUData& ctu, const CUGeom& cuGeom, int qp)
 {
     m_absIdxInCTU   = cuGeom.absPartIdx;
     m_encData       = ctu.m_encData;
@@ -312,8 +312,11 @@
     m_cuAboveRight  = ctu.m_cuAboveRight;
     X265_CHECK(m_numPartitions == cuGeom.numPartitions, "initSubCU() size mismatch\n");
 
-    /* sequential memsets */
-    m_partSet((uint8_t*)m_qp, (uint8_t)ctu.m_qp[0]);
+    if (cuGeom.depth <= (uint32_t)m_encData->m_param->rc.maxCuDQPDepth && ctu.m_slice->m_pps->bUseDQP)
+        m_partSet((uint8_t*)m_qp, (uint8_t)qp);
+    else
+        m_partSet((uint8_t*)m_qp, (uint8_t)ctu.m_qp[0]);
+
     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);
diff -r cc496665280f -r 02f1b991ed9d source/common/cudata.h
--- a/source/common/cudata.h	Sun Mar 22 22:16:45 2015 -0400
+++ b/source/common/cudata.h	Mon Mar 23 14:23:42 2015 +0530
@@ -182,7 +182,7 @@
     static void calcCTUGeoms(uint32_t ctuWidth, uint32_t ctuHeight, uint32_t maxCUSize, uint32_t minCUSize, CUGeom cuDataArray[CUGeom::MAX_GEOMS]);
 
     void     initCTU(const Frame& frame, uint32_t cuAddr, int qp);
-    void     initSubCU(const CUData& ctu, const CUGeom& cuGeom);
+    void     initSubCU(const CUData& ctu, const CUGeom& cuGeom, int qp);
     void     initLosslessCU(const CUData& cu, const CUGeom& cuGeom);
 
     void     copyPartFrom(const CUData& cu, const CUGeom& childGeom, uint32_t subPartIdx);
diff -r cc496665280f -r 02f1b991ed9d source/common/param.cpp
--- a/source/common/param.cpp	Sun Mar 22 22:16:45 2015 -0400
+++ b/source/common/param.cpp	Mon Mar 23 14:23:42 2015 +0530
@@ -208,6 +208,7 @@
     param->rc.zones = NULL;
     param->rc.bEnableSlowFirstPass = 0;
     param->rc.bStrictCbr = 0;
+    param->rc.maxCuDQPDepth = 0;
 
     /* Video Usability Information (VUI) */
     param->vui.aspectRatioIdc = 0;
@@ -841,6 +842,7 @@
     OPT2("pools", "numa-pools") p->numaPools = strdup(value);
     OPT("lambda-file") p->rc.lambdaFileName = strdup(value);
     OPT("analysis-file") p->analysisFileName = strdup(value);
+    OPT("max-dqp-depth") p->rc.maxCuDQPDepth = atoi(value);
     else
         return X265_PARAM_BAD_NAME;
 #undef OPT
diff -r cc496665280f -r 02f1b991ed9d source/encoder/analysis.cpp
--- a/source/encoder/analysis.cpp	Sun Mar 22 22:16:45 2015 -0400
+++ b/source/encoder/analysis.cpp	Mon Mar 23 14:23:42 2015 +0530
@@ -225,6 +225,10 @@
     bool mightSplit = !(cuGeom.flags & CUGeom::LEAF);
     bool mightNotSplit = !(cuGeom.flags & CUGeom::SPLIT_MANDATORY);
 
+    int32_t qp = 0;
+    if (depth <= (uint32_t)m_param->rc.maxCuDQPDepth && parentCTU.m_slice->m_pps->bUseDQP)
+        qp = calculateQpforCuSize(parentCTU, cuGeom);
+
     if (m_param->analysisMode == X265_ANALYSIS_LOAD)
     {
         uint8_t* reuseDepth  = &m_reuseIntraDataCTU->depth[parentCTU.m_cuAddr * parentCTU.m_numPartitions];
@@ -234,11 +238,10 @@
 
         if (mightNotSplit && depth == reuseDepth[zOrder] && zOrder == cuGeom.absPartIdx)
         {
-            m_quant.setQPforQuant(parentCTU);
-
             PartSize size = (PartSize)reusePartSizes[zOrder];
             Mode& mode = size == SIZE_2Nx2N ? md.pred[PRED_INTRA] : md.pred[PRED_INTRA_NxN];
-            mode.cu.initSubCU(parentCTU, cuGeom);
+            mode.cu.initSubCU(parentCTU, cuGeom, qp);
+            m_quant.setQPforQuant(mode.cu);
             checkIntra(mode, cuGeom, size, &reuseModes[zOrder], &reuseChromaModes[zOrder]);
             checkBestMode(mode, depth);
 
@@ -255,15 +258,14 @@
     }
     else if (mightNotSplit)
     {
-        m_quant.setQPforQuant(parentCTU);
-
-        md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom);
+        md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom, qp);
+        m_quant.setQPforQuant(md.pred[PRED_INTRA].cu);
         checkIntra(md.pred[PRED_INTRA], cuGeom, SIZE_2Nx2N, NULL, NULL);
         checkBestMode(md.pred[PRED_INTRA], depth);
 
         if (cuGeom.log2CUSize == 3 && m_slice->m_sps->quadtreeTULog2MinSize < 3)
         {
-            md.pred[PRED_INTRA_NxN].cu.initSubCU(parentCTU, cuGeom);
+            md.pred[PRED_INTRA_NxN].cu.initSubCU(parentCTU, cuGeom, qp);
             checkIntra(md.pred[PRED_INTRA_NxN], cuGeom, SIZE_NxN, NULL, NULL);
             checkBestMode(md.pred[PRED_INTRA_NxN], depth);
         }
@@ -280,7 +282,7 @@
         Mode* splitPred = &md.pred[PRED_SPLIT];
         splitPred->initCosts();
         CUData* splitCU = &splitPred->cu;
-        splitCU->initSubCU(parentCTU, cuGeom);
+        splitCU->initSubCU(parentCTU, cuGeom, qp);
 
         uint32_t nextDepth = depth + 1;
         ModeDepth& nd = m_modeDepth[nextDepth];
@@ -496,6 +498,10 @@
 
     X265_CHECK(m_param->rdLevel >= 2, "compressInterCU_dist does not support RD 0 or 1\n");
 
+    int32_t qp = 0;
+    if (depth <= (uint32_t)m_param->rc.maxCuDQPDepth)
+        qp = calculateQpforCuSize(parentCTU, cuGeom);
+
     if (mightNotSplit && depth >= minDepth)
     {
         int bTryAmp = m_slice->m_sps->maxAMPDepth > depth && (cuGeom.log2CUSize < 6 || m_param->rdLevel > 4);
@@ -504,28 +510,28 @@
         PMODE pmode(*this, cuGeom);
 
         /* Initialize all prediction CUs based on parentCTU */
-        md.pred[PRED_MERGE].cu.initSubCU(parentCTU, cuGeom);
-        md.pred[PRED_SKIP].cu.initSubCU(parentCTU, cuGeom);
+        md.pred[PRED_MERGE].cu.initSubCU(parentCTU, cuGeom, qp);
+        md.pred[PRED_SKIP].cu.initSubCU(parentCTU, cuGeom, qp);
         if (bTryIntra)
         {
-            md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom);
+            md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom, qp);
             if (cuGeom.log2CUSize == 3 && m_slice->m_sps->quadtreeTULog2MinSize < 3 && m_param->rdLevel >= 5)
-                md.pred[PRED_INTRA_NxN].cu.initSubCU(parentCTU, cuGeom);
+                md.pred[PRED_INTRA_NxN].cu.initSubCU(parentCTU, cuGeom, qp);
             pmode.modes[pmode.m_jobTotal++] = PRED_INTRA;
         }
-        md.pred[PRED_2Nx2N].cu.initSubCU(parentCTU, cuGeom); pmode.modes[pmode.m_jobTotal++] = PRED_2Nx2N;
-        md.pred[PRED_BIDIR].cu.initSubCU(parentCTU, cuGeom);
+        md.pred[PRED_2Nx2N].cu.initSubCU(parentCTU, cuGeom, qp); pmode.modes[pmode.m_jobTotal++] = PRED_2Nx2N;
+        md.pred[PRED_BIDIR].cu.initSubCU(parentCTU, cuGeom, qp);
         if (m_param->bEnableRectInter)
         {
-            md.pred[PRED_2NxN].cu.initSubCU(parentCTU, cuGeom); pmode.modes[pmode.m_jobTotal++] = PRED_2NxN;
-            md.pred[PRED_Nx2N].cu.initSubCU(parentCTU, cuGeom); pmode.modes[pmode.m_jobTotal++] = PRED_Nx2N;
+            md.pred[PRED_2NxN].cu.initSubCU(parentCTU, cuGeom, qp); pmode.modes[pmode.m_jobTotal++] = PRED_2NxN;
+            md.pred[PRED_Nx2N].cu.initSubCU(parentCTU, cuGeom, qp); pmode.modes[pmode.m_jobTotal++] = PRED_Nx2N;
         }
         if (bTryAmp)
         {
-            md.pred[PRED_2NxnU].cu.initSubCU(parentCTU, cuGeom); pmode.modes[pmode.m_jobTotal++] = PRED_2NxnU;
-            md.pred[PRED_2NxnD].cu.initSubCU(parentCTU, cuGeom); pmode.modes[pmode.m_jobTotal++] = PRED_2NxnD;
-            md.pred[PRED_nLx2N].cu.initSubCU(parentCTU, cuGeom); pmode.modes[pmode.m_jobTotal++] = PRED_nLx2N;
-            md.pred[PRED_nRx2N].cu.initSubCU(parentCTU, cuGeom); pmode.modes[pmode.m_jobTotal++] = PRED_nRx2N;
+            md.pred[PRED_2NxnU].cu.initSubCU(parentCTU, cuGeom, qp); pmode.modes[pmode.m_jobTotal++] = PRED_2NxnU;
+            md.pred[PRED_2NxnD].cu.initSubCU(parentCTU, cuGeom, qp); pmode.modes[pmode.m_jobTotal++] = PRED_2NxnD;
+            md.pred[PRED_nLx2N].cu.initSubCU(parentCTU, cuGeom, qp); pmode.modes[pmode.m_jobTotal++] = PRED_nLx2N;
+            md.pred[PRED_nRx2N].cu.initSubCU(parentCTU, cuGeom, qp); pmode.modes[pmode.m_jobTotal++] = PRED_nRx2N;
         }
 
         pmode.tryBondPeers(*m_frame->m_encData->m_jobProvider, pmode.m_jobTotal);
@@ -654,7 +660,7 @@
 
         if (md.bestMode->rdCost == MAX_INT64 && !bTryIntra)
         {
-            md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom);
+            md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom, qp);
             checkIntraInInter(md.pred[PRED_INTRA], cuGeom);
             encodeIntraInInter(md.pred[PRED_INTRA], cuGeom);
             checkBestMode(md.pred[PRED_INTRA], depth);
@@ -680,7 +686,7 @@
         Mode* splitPred = &md.pred[PRED_SPLIT];
         splitPred->initCosts();
         CUData* splitCU = &splitPred->cu;
-        splitCU->initSubCU(parentCTU, cuGeom);
+        splitCU->initSubCU(parentCTU, cuGeom, qp);
 
         uint32_t nextDepth = depth + 1;
         ModeDepth& nd = m_modeDepth[nextDepth];
@@ -744,13 +750,17 @@
     bool mightNotSplit = !(cuGeom.flags & CUGeom::SPLIT_MANDATORY);
     uint32_t minDepth = topSkipMinDepth(parentCTU, cuGeom);
 
+    int32_t qp = 0;
+    if (depth <= (uint32_t)m_param->rc.maxCuDQPDepth && parentCTU.m_slice->m_pps->bUseDQP)
+        qp = calculateQpforCuSize(parentCTU, cuGeom);
+
     if (mightNotSplit && depth >= minDepth)
     {
         bool bTryIntra = m_slice->m_sliceType != B_SLICE || m_param->bIntraInBFrames;
 
         /* Compute Merge Cost */
-        md.pred[PRED_MERGE].cu.initSubCU(parentCTU, cuGeom);
-        md.pred[PRED_SKIP].cu.initSubCU(parentCTU, cuGeom);
+        md.pred[PRED_MERGE].cu.initSubCU(parentCTU, cuGeom, qp);
+        md.pred[PRED_SKIP].cu.initSubCU(parentCTU, cuGeom, qp);
         checkMerge2Nx2N_rd0_4(md.pred[PRED_SKIP], md.pred[PRED_MERGE], cuGeom);
 
         bool earlyskip = false;
@@ -759,24 +769,24 @@
 
         if (!earlyskip)
         {
-            md.pred[PRED_2Nx2N].cu.initSubCU(parentCTU, cuGeom);
+            md.pred[PRED_2Nx2N].cu.initSubCU(parentCTU, cuGeom, qp);
             checkInter_rd0_4(md.pred[PRED_2Nx2N], cuGeom, SIZE_2Nx2N);
 
             if (m_slice->m_sliceType == B_SLICE)
             {
-                md.pred[PRED_BIDIR].cu.initSubCU(parentCTU, cuGeom);
+                md.pred[PRED_BIDIR].cu.initSubCU(parentCTU, cuGeom, qp);
                 checkBidir2Nx2N(md.pred[PRED_2Nx2N], md.pred[PRED_BIDIR], cuGeom);
             }
 
             Mode *bestInter = &md.pred[PRED_2Nx2N];
             if (m_param->bEnableRectInter)
             {
-                md.pred[PRED_Nx2N].cu.initSubCU(parentCTU, cuGeom);
+                md.pred[PRED_Nx2N].cu.initSubCU(parentCTU, cuGeom, qp);
                 checkInter_rd0_4(md.pred[PRED_Nx2N], cuGeom, SIZE_Nx2N);
                 if (md.pred[PRED_Nx2N].sa8dCost < bestInter->sa8dCost)
                     bestInter = &md.pred[PRED_Nx2N];
 
-                md.pred[PRED_2NxN].cu.initSubCU(parentCTU, cuGeom);
+                md.pred[PRED_2NxN].cu.initSubCU(parentCTU, cuGeom, qp);
                 checkInter_rd0_4(md.pred[PRED_2NxN], cuGeom, SIZE_2NxN);
                 if (md.pred[PRED_2NxN].sa8dCost < bestInter->sa8dCost)
                     bestInter = &md.pred[PRED_2NxN];
@@ -798,24 +808,24 @@
 
                 if (bHor)
                 {
-                    md.pred[PRED_2NxnU].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_2NxnU].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkInter_rd0_4(md.pred[PRED_2NxnU], cuGeom, SIZE_2NxnU);
                     if (md.pred[PRED_2NxnU].sa8dCost < bestInter->sa8dCost)
                         bestInter = &md.pred[PRED_2NxnU];
 
-                    md.pred[PRED_2NxnD].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_2NxnD].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkInter_rd0_4(md.pred[PRED_2NxnD], cuGeom, SIZE_2NxnD);
                     if (md.pred[PRED_2NxnD].sa8dCost < bestInter->sa8dCost)
                         bestInter = &md.pred[PRED_2NxnD];
                 }
                 if (bVer)
                 {
-                    md.pred[PRED_nLx2N].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_nLx2N].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkInter_rd0_4(md.pred[PRED_nLx2N], cuGeom, SIZE_nLx2N);
                     if (md.pred[PRED_nLx2N].sa8dCost < bestInter->sa8dCost)
                         bestInter = &md.pred[PRED_nLx2N];
 
-                    md.pred[PRED_nRx2N].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_nRx2N].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkInter_rd0_4(md.pred[PRED_nRx2N], cuGeom, SIZE_nRx2N);
                     if (md.pred[PRED_nRx2N].sa8dCost < bestInter->sa8dCost)
                         bestInter = &md.pred[PRED_nRx2N];
@@ -847,7 +857,7 @@
                 if ((bTryIntra && md.bestMode->cu.getQtRootCbf(0)) ||
                     md.bestMode->sa8dCost == MAX_INT64)
                 {
-                    md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkIntraInInter(md.pred[PRED_INTRA], cuGeom);
                     encodeIntraInInter(md.pred[PRED_INTRA], cuGeom);
                     checkBestMode(md.pred[PRED_INTRA], depth);
@@ -865,7 +875,7 @@
 
                 if (bTryIntra || md.bestMode->sa8dCost == MAX_INT64)
                 {
-                    md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkIntraInInter(md.pred[PRED_INTRA], cuGeom);
                     if (md.pred[PRED_INTRA].sa8dCost < md.bestMode->sa8dCost)
                         md.bestMode = &md.pred[PRED_INTRA];
@@ -952,7 +962,7 @@
         Mode* splitPred = &md.pred[PRED_SPLIT];
         splitPred->initCosts();
         CUData* splitCU = &splitPred->cu;
-        splitCU->initSubCU(parentCTU, cuGeom);
+        splitCU->initSubCU(parentCTU, cuGeom, qp);
 
         uint32_t nextDepth = depth + 1;
         ModeDepth& nd = m_modeDepth[nextDepth];
@@ -1025,14 +1035,18 @@
     bool mightSplit = !(cuGeom.flags & CUGeom::LEAF);
     bool mightNotSplit = !(cuGeom.flags & CUGeom::SPLIT_MANDATORY);
 
+    int32_t qp = 0;
+    if (depth <= (uint32_t)m_param->rc.maxCuDQPDepth && parentCTU.m_slice->m_pps->bUseDQP)
+        qp = calculateQpforCuSize(parentCTU, cuGeom);
+
     if (m_param->analysisMode == X265_ANALYSIS_LOAD)
     {
         uint8_t* reuseDepth  = &m_reuseInterDataCTU->depth[parentCTU.m_cuAddr * parentCTU.m_numPartitions];
         uint8_t* reuseModes  = &m_reuseInterDataCTU->modes[parentCTU.m_cuAddr * parentCTU.m_numPartitions];
         if (mightNotSplit && depth == reuseDepth[zOrder] && zOrder == cuGeom.absPartIdx && reuseModes[zOrder] == MODE_SKIP)
         {
-            md.pred[PRED_SKIP].cu.initSubCU(parentCTU, cuGeom);
-            md.pred[PRED_MERGE].cu.initSubCU(parentCTU, cuGeom);
+            md.pred[PRED_SKIP].cu.initSubCU(parentCTU, cuGeom, qp);
+            md.pred[PRED_MERGE].cu.initSubCU(parentCTU, cuGeom, qp);
             checkMerge2Nx2N_rd5_6(md.pred[PRED_SKIP], md.pred[PRED_MERGE], cuGeom, true);
 
             if (m_bTryLossless)
@@ -1051,20 +1065,20 @@
 
     if (mightNotSplit)
     {
-        md.pred[PRED_SKIP].cu.initSubCU(parentCTU, cuGeom);
-        md.pred[PRED_MERGE].cu.initSubCU(parentCTU, cuGeom);
+        md.pred[PRED_SKIP].cu.initSubCU(parentCTU, cuGeom, qp);
+        md.pred[PRED_MERGE].cu.initSubCU(parentCTU, cuGeom, qp);
         checkMerge2Nx2N_rd5_6(md.pred[PRED_SKIP], md.pred[PRED_MERGE], cuGeom, false);
         bool earlySkip = m_param->bEnableEarlySkip && md.bestMode && !md.bestMode->cu.getQtRootCbf(0);
 
         if (!earlySkip)
         {
-            md.pred[PRED_2Nx2N].cu.initSubCU(parentCTU, cuGeom);
+            md.pred[PRED_2Nx2N].cu.initSubCU(parentCTU, cuGeom, qp);
             checkInter_rd5_6(md.pred[PRED_2Nx2N], cuGeom, SIZE_2Nx2N, false);
             checkBestMode(md.pred[PRED_2Nx2N], cuGeom.depth);
 
             if (m_slice->m_sliceType == B_SLICE)
             {
-                md.pred[PRED_BIDIR].cu.initSubCU(parentCTU, cuGeom);
+                md.pred[PRED_BIDIR].cu.initSubCU(parentCTU, cuGeom, qp);
                 checkBidir2Nx2N(md.pred[PRED_2Nx2N], md.pred[PRED_BIDIR], cuGeom);
                 if (md.pred[PRED_BIDIR].sa8dCost < MAX_INT64)
                 {
@@ -1075,11 +1089,11 @@
 
             if (m_param->bEnableRectInter)
             {
-                md.pred[PRED_Nx2N].cu.initSubCU(parentCTU, cuGeom);
+                md.pred[PRED_Nx2N].cu.initSubCU(parentCTU, cuGeom, qp);
                 checkInter_rd5_6(md.pred[PRED_Nx2N], cuGeom, SIZE_Nx2N, false);
                 checkBestMode(md.pred[PRED_Nx2N], cuGeom.depth);
 
-                md.pred[PRED_2NxN].cu.initSubCU(parentCTU, cuGeom);
+                md.pred[PRED_2NxN].cu.initSubCU(parentCTU, cuGeom, qp);
                 checkInter_rd5_6(md.pred[PRED_2NxN], cuGeom, SIZE_2NxN, false);
                 checkBestMode(md.pred[PRED_2NxN], cuGeom.depth);
             }
@@ -1102,21 +1116,21 @@
 
                 if (bHor)
                 {
-                    md.pred[PRED_2NxnU].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_2NxnU].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkInter_rd5_6(md.pred[PRED_2NxnU], cuGeom, SIZE_2NxnU, bMergeOnly);
                     checkBestMode(md.pred[PRED_2NxnU], cuGeom.depth);
 
-                    md.pred[PRED_2NxnD].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_2NxnD].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkInter_rd5_6(md.pred[PRED_2NxnD], cuGeom, SIZE_2NxnD, bMergeOnly);
                     checkBestMode(md.pred[PRED_2NxnD], cuGeom.depth);
                 }
                 if (bVer)
                 {
-                    md.pred[PRED_nLx2N].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_nLx2N].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkInter_rd5_6(md.pred[PRED_nLx2N], cuGeom, SIZE_nLx2N, bMergeOnly);
                     checkBestMode(md.pred[PRED_nLx2N], cuGeom.depth);
 
-                    md.pred[PRED_nRx2N].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_nRx2N].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkInter_rd5_6(md.pred[PRED_nRx2N], cuGeom, SIZE_nRx2N, bMergeOnly);
                     checkBestMode(md.pred[PRED_nRx2N], cuGeom.depth);
                 }
@@ -1124,13 +1138,13 @@
 
             if (m_slice->m_sliceType != B_SLICE || m_param->bIntraInBFrames)
             {
-                md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom);
+                md.pred[PRED_INTRA].cu.initSubCU(parentCTU, cuGeom, qp);
                 checkIntra(md.pred[PRED_INTRA], cuGeom, SIZE_2Nx2N, NULL, NULL);
                 checkBestMode(md.pred[PRED_INTRA], depth);
 
                 if (cuGeom.log2CUSize == 3 && m_slice->m_sps->quadtreeTULog2MinSize < 3)
                 {
-                    md.pred[PRED_INTRA_NxN].cu.initSubCU(parentCTU, cuGeom);
+                    md.pred[PRED_INTRA_NxN].cu.initSubCU(parentCTU, cuGeom, qp);
                     checkIntra(md.pred[PRED_INTRA_NxN], cuGeom, SIZE_NxN, NULL, NULL);
                     checkBestMode(md.pred[PRED_INTRA_NxN], depth);
                 }
@@ -1150,7 +1164,7 @@
         Mode* splitPred = &md.pred[PRED_SPLIT];
         splitPred->initCosts();
         CUData* splitCU = &splitPred->cu;
-        splitCU->initSubCU(parentCTU, cuGeom);
+        splitCU->initSubCU(parentCTU, cuGeom, qp);
 
         uint32_t nextDepth = depth + 1;
         ModeDepth& nd = m_modeDepth[nextDepth];
@@ -1897,7 +1911,7 @@
     return false;
 }
 
-int Analysis::calculateQpforCuSize(CUData& ctu, const CUGeom& cuGeom)
+int Analysis::calculateQpforCuSize(const CUData& ctu, const CUGeom& cuGeom)
 {
     uint32_t ctuAddr = ctu.m_cuAddr;
     FrameData& curEncData = *m_frame->m_encData;
diff -r cc496665280f -r 02f1b991ed9d source/encoder/analysis.h
--- a/source/encoder/analysis.h	Sun Mar 22 22:16:45 2015 -0400
+++ b/source/encoder/analysis.h	Mon Mar 23 14:23:42 2015 +0530
@@ -139,7 +139,7 @@
     /* generate residual and recon pixels for an entire CTU recursively (RD0) */
     void encodeResidue(const CUData& parentCTU, const CUGeom& cuGeom);
 
-    int calculateQpforCuSize(CUData& ctu, const CUGeom& cuGeom);
+    int calculateQpforCuSize(const CUData& ctu, const CUGeom& cuGeom);
 
     /* check whether current mode is the new best */
     inline void checkBestMode(Mode& mode, uint32_t depth)
diff -r cc496665280f -r 02f1b991ed9d source/encoder/encoder.cpp
--- a/source/encoder/encoder.cpp	Sun Mar 22 22:16:45 2015 -0400
+++ b/source/encoder/encoder.cpp	Mon Mar 23 14:23:42 2015 +0530
@@ -1557,15 +1557,11 @@
     bool bIsVbv = m_param->rc.vbvBufferSize > 0 && m_param->rc.vbvMaxBitrate > 0;
 
     if (!m_param->bLossless && (m_param->rc.aqMode || bIsVbv))
-    {
         pps->bUseDQP = true;
-        pps->maxCuDQPDepth = 0; /* TODO: make configurable? */
-    }
     else
-    {
         pps->bUseDQP = false;
-        pps->maxCuDQPDepth = 0;
-    }
+
+    pps->maxCuDQPDepth = m_param->rc.maxCuDQPDepth;
 
     pps->chromaQpOffset[0] = m_param->cbQpOffset;
     pps->chromaQpOffset[1] = m_param->crQpOffset;
@@ -1788,6 +1784,20 @@
         p->analysisMode = X265_ANALYSIS_OFF;
         x265_log(p, X265_LOG_WARNING, "Analysis save and load mode not supported for distributed mode analysis\n");
     }
+    bool bIsVbv = m_param->rc.vbvBufferSize > 0 && m_param->rc.vbvMaxBitrate > 0;
+    if (!m_param->bLossless && (m_param->rc.aqMode || bIsVbv))
+    {
+        if (p->rc.maxCuDQPDepth > (int32_t)(g_maxCUDepth - 1))
+        {
+            p->rc.maxCuDQPDepth = 0;
+            x265_log(p, X265_LOG_WARNING, "The maxCUDQPDepth should be less than (maxCUDepth - 1) setting maxCUDQPDepth = %d \n", 0);
+        }
+    }
+    else
+    {
+        p->rc.maxCuDQPDepth = 0;
+        x265_log(p, X265_LOG_WARNING, "The maxCUDQPDepth should be zero when vbv and aq Mode is disabled\n");
+    }
 }
 
 void Encoder::allocAnalysis(x265_analysis_data* analysis)
diff -r cc496665280f -r 02f1b991ed9d source/x265.h
--- a/source/x265.h	Sun Mar 22 22:16:45 2015 -0400
+++ b/source/x265.h	Mon Mar 23 14:23:42 2015 +0530
@@ -978,6 +978,12 @@
         /* Enable stricter conditions to check bitrate deviations in CBR mode. May compromise 
          * quality to maintain bitrate adherence */
         int bStrictCbr;
+
+        /* the new param option --max-dqp-depth will enable adaptive quantization to adjusts the QP values
+         * based on individual quantization groups (QGs), the QGs can be 64x64, 32x32 or 16x16 block
+         * the default : 0, QPs are adjusted for 64x64 pixel Coding tree uint (CTU),
+         * minimum is depth 0 and maximum is maxCUDepth - 1 */
+        int maxCuDQPDepth;
     } rc;
 
     /*== Video Usability Information ==*/
diff -r cc496665280f -r 02f1b991ed9d source/x265cli.h
--- a/source/x265cli.h	Sun Mar 22 22:16:45 2015 -0400
+++ b/source/x265cli.h	Mon Mar 23 14:23:42 2015 +0530
@@ -204,6 +204,7 @@
     { "strict-cbr",           no_argument, NULL, 0 },
     { "temporal-layers",      no_argument, NULL, 0 },
     { "no-temporal-layers",   no_argument, NULL, 0 },
+    { "max-dqp-depth",  required_argument, NULL, 0 },
     { 0, 0, 0, 0 },
     { 0, 0, 0, 0 },
     { 0, 0, 0, 0 },


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