[x265] [PATCH] QP- Lambda table -x265_lambda2_tab_I , x265_lambda2_tab_non_ I : for inter and intra blocks
sumalatha at multicorewareinc.com
sumalatha at multicorewareinc.com
Wed Sep 4 10:11:31 CEST 2013
# HG changeset patch
# User sumalatha
# Date 1378282268 -19800
# Node ID f2cdc2762beec1afc5eee9f3ee3de02f107451af
# Parent e7cfb49dc5870c1a2b4a1d462ba5151462256e5e
QP- Lambda table -x265_lambda2_tab_I , x265_lambda2_tab_non_ I : for inter and intra blocks
diff -r e7cfb49dc587 -r f2cdc2762bee source/Lib/TLibCommon/TComRom.cpp
--- a/source/Lib/TLibCommon/TComRom.cpp Wed Sep 04 00:27:22 2013 -0500
+++ b/source/Lib/TLibCommon/TComRom.cpp Wed Sep 04 13:41:08 2013 +0530
@@ -513,15 +513,26 @@
const int g_winUnitX[] = { 1, 2, 2, 1 };
const int g_winUnitY[] = { 1, 2, 1, 1 };
-const int x265_lambda2_tab[MAX_QP + 1] =
+const double x265_lambda2_tab_I[MAX_QP + 1] =
{
- 14, 18, 23, 30, 39, 50, 64, 83,
- 106, 137, 176, 226, 291, 374, 480, 617,
- 794, 1020, 1311, 1686, 2165, 2783, 3576, 4594,
- 5904, 7586, 9747, 12524, 16094, 20679, 26571, 34143,
- 43871, 56371, 72432, 93070, 119587, 153661, 197441, 253697,
- 325982, 418861, 538203, 691549, 888585, 1141764, 1467077, 1885077,
- 2422177, 3112305
+0.012265625,0.022265625, 0.028052813, 0.035344375, 0.04453125, 0.056105938, 0.070689063, 0.0890625,
+0.112211563, 0.141377813, 0.178125, 0.224423438, 0.282755938, 0.35625, 0.448846875,
+0.565511563, 0.7125, 0.89769375, 1.131023125, 1.425, 1.7953875, 2.262046563, 2.85,
+3.590775, 4.524093125, 5.7, 7.7800125, 10.55621688, 14.25, 19.1508, 25.63652688, 34.2,
+45.48315, 60.32124, 79.8, 105.3293997, 138.7388519, 182.4, 229.8095994, 289.5419519, 364.8,
+459.6191991, 579.0839038, 729.6, 919.2383981, 1158.167808, 1459.2, 1838.476796, 2316.335615,
+2918.4, 3676.953592, 4632.67123
+};
+
+const double x265_lambda2_non_I[MAX_QP + 1] =
+{
+0.05231, 0.060686, 0.07646, 0.096333333, 0.151715667, 0.15292, 0.192666667, 0.242745, 0.382299,
+0.385333333, 0.485489333, 0.611678333, 0.963333333, 0.970979, 1.223356667, 1.541333333, 2.427447667,
+2.446714, 3.082666667, 3.883916667, 6.116785, 6.165333333, 7.767833333, 9.786856667, 15.41333333,
+16.57137733, 22.183542, 29.5936, 39.357022, 52.19656867, 69.05173333, 91.14257667, 150.0651347,
+157.8325333, 207.1422197, 271.4221573, 443.904, 447.4271947, 563.722941, 710.2464, 1118.567987,
+1127.445883, 1420.4928, 1789.70878, 2818.614706, 2840.9856, 3579.41756, 4509.78353, 7102.464,
+7158.83512, 9019.56706, 11363.9424
};
const UChar g_lpsTable[64][4] =
diff -r e7cfb49dc587 -r f2cdc2762bee source/Lib/TLibCommon/TComRom.h
--- a/source/Lib/TLibCommon/TComRom.h Wed Sep 04 00:27:22 2013 -0500
+++ b/source/Lib/TLibCommon/TComRom.h Wed Sep 04 13:41:08 2013 +0530
@@ -293,8 +293,8 @@
// Map Luma samples to chroma samples
extern const int g_winUnitX[MAX_CHROMA_FORMAT_IDC + 1];
extern const int g_winUnitY[MAX_CHROMA_FORMAT_IDC + 1];
-extern const int x265_lambda2_tab[MAX_QP+1];
-
+extern const double x265_lambda2_tab_I[MAX_QP + 1];
+extern const double x265_lambda2_non_I[MAX_QP + 1];
// CABAC tables
extern const UChar g_lpsTable[64][4];
extern const UChar g_renormTable[32];
diff -r e7cfb49dc587 -r f2cdc2762bee source/Lib/TLibEncoder/TEncTop.cpp
--- a/source/Lib/TLibEncoder/TEncTop.cpp Wed Sep 04 00:27:22 2013 -0500
+++ b/source/Lib/TLibEncoder/TEncTop.cpp Wed Sep 04 13:41:08 2013 +0530
@@ -840,7 +840,15 @@
{
FrameEncoder *curEncoder = &m_frameEncoder[m_curEncoder];
int qp = slice->getSliceQp();
- int lambda = x265_lambda2_tab[qp] >> 8;
+ double lambda = 0;
+ if(slice->getSliceType() == I_SLICE)
+ {
+ lambda = X265_MIN(1,x265_lambda2_tab_I[qp]);
+ }
+ else
+ {
+ lambda = X265_MIN(1,x265_lambda2_non_I[qp]);
+ }
// for RDO
// in RdCost there is only one lambda because the luma and chroma bits are not separated,
diff -r e7cfb49dc587 -r f2cdc2762bee source/encoder/frameencoder.cpp
--- a/source/encoder/frameencoder.cpp Wed Sep 04 00:27:22 2013 -0500
+++ b/source/encoder/frameencoder.cpp Wed Sep 04 13:41:08 2013 +0530
@@ -294,43 +294,15 @@
// Lambda computation
// ------------------------------------------------------------------------------------------------------------------
- int qp;
-
- // compute lambda value
- int NumberBFrames = (m_cfg->getGOPSize() - 1);
- int SHIFT_QP = 12;
- double lambda_scale = 1.0 - Clip3(0.0, 0.5, 0.05 * (double)NumberBFrames);
-#if FULL_NBIT
- int bitdepth_luma_qp_scale = 6 * (X265_DEPTH - 8);
- double qp_temp_orig = (double)dQP - SHIFT_QP;
-#else
- int bitdepth_luma_qp_scale = 0;
-#endif
- double qp_temp = (double)qpdouble + bitdepth_luma_qp_scale - SHIFT_QP;
-
- // Case #1: I or P-slices (key-frame)
- double qpFactor = m_cfg->getGOPEntry(gopID).m_QPFactor;
- if (sliceType == I_SLICE)
- {
- qpFactor = 0.57 * lambda_scale;
- }
- lambda = qpFactor * pow(2.0, qp_temp / 3.0);
-
- if (depth > 0)
- {
-#if FULL_NBIT
- lambda *= Clip3(2.00, 4.00, (qp_temp_orig / 6.0));
-#else
- lambda *= Clip3(2.00, 4.00, (qp_temp / 6.0));
-#endif
- }
-
- qp = X265_MAX(-m_sps.getQpBDOffsetY(), X265_MIN(MAX_QP, (int)floor(qpdouble + 0.5)));
-
- if (slice->getSliceType() != I_SLICE)
- {
- lambda *= m_cfg->getLambdaModifier(0); // temporal layer 0
- }
+ int qp = X265_MAX(-m_sps.getQpBDOffsetY(), X265_MIN(MAX_QP, (int)floor(qpdouble + 0.5)));
+ if(slice->getSliceType() == I_SLICE)
+ {
+ lambda = X265_MIN(1,x265_lambda2_tab_I[qp]);
+ }
+ else
+ {
+ lambda = X265_MIN(1,x265_lambda2_non_I[qp]);
+ }
// for RDO
// in RdCost there is only one lambda because the luma and chroma bits are not separated,
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