[x265] [PATCH] add API and implementation for Region of Interest(ROI)

[santhoshini at multicorewareinc.com]

# HG changeset patch
# User Santhoshini Sekar<santhoshini at multicorewareinc.com>
# Date 1438679012 -19800
#      Tue Aug 04 14:33:32 2015 +0530
# Node ID 1d61a8d12dc6bc446772817fcb90aab5b371b90e
# Parent  d5278c76d341b3bac405938dbfb64cb7e2d9bce5
add API and implementation for Region of Interest(ROI)

diff -r d5278c76d341 -r 1d61a8d12dc6 source/common/frame.h
--- a/source/common/frame.h	Mon Aug 03 10:18:46 2015 -0500
+++ b/source/common/frame.h	Tue Aug 04 14:33:32 2015 +0530
@@ -59,6 +59,8 @@
     bool                   m_lowresInit;         // lowres init complete (pre-analysis)
     bool                   m_bChromaExtended;    // orig chroma planes motion extended for weight analysis
 
+    float*                 m_quantOffsets;        // points to quantOffsets in x265_picture
+
     /* Frame Parallelism - notification between FrameEncoders of available motion reference rows */
     ThreadSafeInteger      m_reconRowCount;      // count of CTU rows completely reconstructed and extended for motion reference
     volatile uint32_t      m_countRefEncoders;   // count of FrameEncoder threads monitoring m_reconRowCount
diff -r d5278c76d341 -r 1d61a8d12dc6 source/encoder/encoder.cpp
--- a/source/encoder/encoder.cpp	Mon Aug 03 10:18:46 2015 -0500
+++ b/source/encoder/encoder.cpp	Tue Aug 04 14:33:32 2015 +0530
@@ -465,6 +465,7 @@
         inFrame->m_pts       = pic_in->pts;
         inFrame->m_forceqp   = pic_in->forceqp;
         inFrame->m_param     = m_reconfigured ? m_latestParam : m_param;
+        inFrame->m_quantOffsets = pic_in->quantOffsets;
 
         if (m_pocLast == 0)
             m_firstPts = inFrame->m_pts;
@@ -484,6 +485,9 @@
             }
         }
 
+        if(pic_in->quantOffsetsFree)
+            pic_in->quantOffsetsFree(pic_in->quantOffsets);
+
         /* Use the frame types from the first pass, if available */
         int sliceType = (m_param->rc.bStatRead) ? m_rateControl->rateControlSliceType(inFrame->m_poc) : pic_in->sliceType;
 
diff -r d5278c76d341 -r 1d61a8d12dc6 source/encoder/slicetype.cpp
--- a/source/encoder/slicetype.cpp	Mon Aug 03 10:18:46 2015 -0500
+++ b/source/encoder/slicetype.cpp	Tue Aug 04 14:33:32 2015 +0530
@@ -96,6 +96,7 @@
     int maxRow = curFrame->m_fencPic->m_picHeight;
     int blockCount = curFrame->m_lowres.maxBlocksInRow * curFrame->m_lowres.maxBlocksInCol;
 
+    float* quantOffsets = curFrame->m_quantOffsets;
     for (int y = 0; y < 3; y++)
     {
         curFrame->m_lowres.wp_ssd[y] = 0;
@@ -113,10 +114,21 @@
 
         if (param->rc.aqMode && param->rc.aqStrength == 0)
         {
-            memset(curFrame->m_lowres.qpCuTreeOffset, 0, cuCount * sizeof(double));
-            memset(curFrame->m_lowres.qpAqOffset, 0, cuCount * sizeof(double));
-            for (int cuxy = 0; cuxy < cuCount; cuxy++)
-                curFrame->m_lowres.invQscaleFactor[cuxy] = 256;
+            if (quantOffsets)
+            {
+                for (int cuxy = 0; cuxy < cuCount; cuxy++)
+                {
+                    curFrame->m_lowres.qpCuTreeOffset[cuxy] = curFrame->m_lowres.qpAqOffset[cuxy] = quantOffsets[cuxy];
+                    curFrame->m_lowres.invQscaleFactor[cuxy] = x265_exp2fix8(curFrame->m_lowres.qpCuTreeOffset[cuxy]);
+                }
+            }
+            else
+            {
+                memset(curFrame->m_lowres.qpCuTreeOffset, 0, cuCount * sizeof(double));
+                memset(curFrame->m_lowres.qpAqOffset, 0, cuCount * sizeof(double));
+                for (int cuxy = 0; cuxy < cuCount; cuxy++)
+                    curFrame->m_lowres.invQscaleFactor[cuxy] = 256;
+            }
         }
 
         /* Need variance data for weighted prediction */
@@ -177,6 +189,8 @@
                     uint32_t energy = acEnergyCu(curFrame, blockX, blockY, param->internalCsp);
                     qp_adj = strength * (X265_LOG2(X265_MAX(energy, 1)) - (14.427f + 2 * (X265_DEPTH - 8)));
                 }
+                if (quantOffsets)
+                    qp_adj += quantOffsets[blockXY];
                 curFrame->m_lowres.qpAqOffset[blockXY] = qp_adj;
                 curFrame->m_lowres.qpCuTreeOffset[blockXY] = qp_adj;
                 curFrame->m_lowres.invQscaleFactor[blockXY] = x265_exp2fix8(qp_adj);
diff -r d5278c76d341 -r 1d61a8d12dc6 source/x265.h
--- a/source/x265.h	Mon Aug 03 10:18:46 2015 -0500
+++ b/source/x265.h	Tue Aug 04 14:33:32 2015 +0530
@@ -205,6 +205,17 @@
      * this data structure */
     x265_analysis_data analysisData;
 
+    /* An array of quantizer offsets to be applied to this image during encoding.
+     * These are added on top of the decisions made by rateControl.
+     * Adaptive quantization must be enabled to use this feature. These quantizer 
+     * offsets should be given for each 16x16 block. Behavior if quant
+     * offsets differ between encoding passes is undefined. */
+    float            *quantOffsets;
+
+    /* optional callback to free quant_offsets when used.
+     * Useful if one wants to use a different quant_offset array for each frame. */
+    void (*quantOffsetsFree)(void*);
+
     /* Frame level statistics */
     x265_frame_stats frameData;