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-rw-r--r--encoder/ih264e_globals.c208
1 files changed, 72 insertions, 136 deletions
diff --git a/encoder/ih264e_globals.c b/encoder/ih264e_globals.c
index 6719c5f..9499782 100644
--- a/encoder/ih264e_globals.c
+++ b/encoder/ih264e_globals.c
@@ -17,6 +17,7 @@
*****************************************************************************
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/
+
/**
*******************************************************************************
* @file
@@ -28,9 +29,6 @@
* @author
* ittiam
*
-* @par List of functions
-*
-*
* @remarks
*
*******************************************************************************
@@ -40,19 +38,19 @@
/* File Includes */
/*****************************************************************************/
-/* User include files */
+/* User Include Files */
#include "ih264_typedefs.h"
#include "ih264_defs.h"
#include "ih264e_defs.h"
#include "ih264e_globals.h"
/*****************************************************************************/
-/* Extern global definitions */
+/* Global definitions */
/*****************************************************************************/
/**
******************************************************************************
-* @brief lamda for varying quantizer scales that would be used to
+* @brief lambda for varying quantizer scales that would be used to
* compute the RD cost while deciding on the MB modes.
* input : qp
* output : lambda
@@ -64,7 +62,7 @@
* (from rate distortion optimization for video compression by sullivan).
******************************************************************************
*/
-const UWORD16 gu2_qp_lambda[52]=
+const UWORD8 gu1_qp_lambdaIP[52]=
{
0, 0, 0, 0, 0, 0, 0, 1,
1, 1, 1, 1, 1, 1, 1, 1,
@@ -77,6 +75,26 @@ const UWORD16 gu2_qp_lambda[52]=
/**
******************************************************************************
+* @brief lambda for varying quantizer scales that would be used to
+* compute the RD cost while deciding on the MB modes.
+* input : qp
+* output : lambda
+* @remarks lambda = max(2, min(4, pow(2, (qp - 12)/6))) * gu1_qp_lambdaIP[]
+******************************************************************************
+*/
+const UWORD8 gu1_qp_lambdaB[52]=
+{
+ 0, 0, 0, 0, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 2, 2,
+ 2, 2, 3, 3, 3, 4, 4, 5,
+ 5, 6, 7, 8, 10, 11, 13, 15,
+ 17, 20, 22, 26, 30, 33, 37, 42,
+ 47, 53, 59, 66, 74, 83, 94, 105,
+ 118, 132, 149, 167,
+};
+
+/**
+******************************************************************************
* @brief Lamda for varying quantizer scales that would be used to
* compute the RD cost while deciding on the MB modes.
* input : qp
@@ -112,7 +130,6 @@ const UWORD8 u1_uev_codelength[32] =
9, 9, 9, 9, 9, 9, 9, 11,
};
-
/**
******************************************************************************
* @brief Look up table to assign cost to a coefficient of a residual block
@@ -196,138 +213,57 @@ const WORD8 gi1_mv_pred_condition[8] =
-1, 0, 1, -1, 2, -1, -1, -1
};
-
-/*******************************************************************************
- * Translation of MPEG QP to H264 QP
- ******************************************************************************/
-/*
- * Note : RC library models QP and bits assuming the QP to be MPEG2.
- * Since MPEG qp varies linearly, when the relationship is computed,
- * it learns that delta(qp) => delta(bits). Now what we are doing by the
- * transation of qp is that
- * QPrc = a + b*2^(QPen)
- * By not considering the weight matrix in both MPEG and H264 we in effect
- * only changing the relation to
- * QPrc = c + d*2^(QPen)
- * This will only entatil changin the RC model parameters, and this will
- * not affect rc relation at all
- *
- *
- * We have MPEG qp which varies from 0-228. The quantization factor has a linear
- * relation ship with the size of quantized values
- *
- * We also have H264 Qp, which varies such that for a change in QP of 6 , we
- * double the corresponding scaling factor. Hence the scaling is linear in terms
- * of 2^(QPh/6)
- *
- * Now we want to have translation between QPm and QPh. Hence we can write
- *
- * QPm = a + b*2^(QPh/6)
- *
- * Appling boundary condition that
- * 1) QPm = 0.625 if QPh = 0
- * 2) QPm = 224 if QPh = 51,
- *
- * we will have
- * a = 0.0063, b = 0.6187
- *
- * Hence the relatiohship is
- * QPm = a + b*2^(Qph/6)
- * QPh = 6*log((Qpm - a)/b)
- *
- *
- * Unrounded values for gau1_h264_to_mpeg2_qmap[H264_QP_ELEM] =
- *
- * 0.625 0.70077 0.78581 0.88127 0.98843 1.10870
- * 1.24370 1.39523 1.56533 1.75625 1.97055 2.21110
- * 2.48110 2.78417 3.12435 3.50620 3.93480 4.41589
- * 4.95590 5.56204 6.24241 7.00609 7.86330 8.82548
- * 9.90550 11.11778 12.47851 14.00588 15.72030 17.64467
- * 19.80470 22.22925 24.95072 28.00547 31.43430 35.28304
- * 39.60310 44.45221 49.89514 56.00463 62.86230 70.55978
- * 79.19990 88.89811 99.78398 112.00296 125.71830 141.11325
- * 158.39350 177.78992 199.56167 223.99963
- *
- *
- *
- * Unrounded values for gau1_mpeg2_to_h264_qmap[MPEG2_QP_ELEM]
- *
- * 0 4.1014 10.1288 13.6477 16.1425 18.0768 19.6568
- * 20.9925 22.1493 23.1696 24.0822 24.9078 25.6614 26.3546
- * 26.9964 27.5938 28.1527 28.6777 29.1726 29.6408 30.0850
- * 30.5074 30.9102 31.2951 31.6636 32.0171 32.3567 32.6834
- * 32.9983 33.3021 33.5957 33.8795 34.1544 34.4208 34.6793
- * 34.9303 35.1742 35.4114 35.6423 35.8671 36.0863 36.3001
- * 36.5087 36.7124 36.9115 37.1060 37.2963 37.4825 37.6648
- * 37.8433 38.0182 38.1896 38.3577 38.5226 38.6844 38.8433
- * 38.9993 39.1525 39.3031 39.4511 39.5966 39.7397 39.8804
- * 40.0189 40.1553 40.2895 40.4217 40.5518 40.6801 40.8065
- * 40.9310 41.0538 41.1749 41.2943 41.4121 41.5283 41.6430
- * 41.7561 41.8678 41.9781 42.0870 42.1946 42.3008 42.4057
- * 42.5094 42.6118 42.7131 42.8132 42.9121 43.0099 43.1066
- * 43.2023 43.2969 43.3905 43.4831 43.5747 43.6653 43.7550
- * 43.8438 43.9317 44.0187 44.1049 44.1901 44.2746 44.3582
- * 44.4411 44.5231 44.6044 44.6849 44.7647 44.8438 44.9221
- * 44.9998 45.0767 45.1530 45.2286 45.3035 45.3779 45.4515
- * 45.5246 45.5970 45.6689 45.7401 45.8108 45.8809 45.9504
- * 46.0194 46.0878 46.1557 46.2231 46.2899 46.3563 46.4221
- * 46.4874 46.5523 46.6166 46.6805 46.7439 46.8069 46.8694
- * 46.9314 46.9930 47.0542 47.1150 47.1753 47.2352 47.2947
- * 47.3538 47.4125 47.4708 47.5287 47.5862 47.6433 47.7001
- * 47.7565 47.8125 47.8682 47.9235 47.9785 48.0331 48.0874
- * 48.1413 48.1949 48.2482 48.3011 48.3537 48.4060 48.4580
- * 48.5097 48.5611 48.6122 48.6629 48.7134 48.7636 48.8135
- * 48.8631 48.9124 48.9615 49.0102 49.0587 49.1069 49.1549
- * 49.2026 49.2500 49.2972 49.3441 49.3908 49.4372 49.4834
- * 49.5293 49.5750 49.6204 49.6656 49.7106 49.7553 49.7998
- * 49.8441 49.8882 49.9320 49.9756 50.0190 50.0622 50.1051
- * 50.1479 50.1904 50.2327 50.2749 50.3168 50.3585 50.4000
- * 50.4413 50.4825 50.5234 50.5641 50.6047 50.6450 50.6852
- * 50.7252 50.7650 50.8046 50.8440 50.8833 50.9224 50.9613
- * 51.0000
- */
-
+/**
+******************************************************************************
+* @brief Translation of Qstep <-> QP
+* Qstep(QP) = Qstep(QP%6) * (2 ^ floor(QP/6))
+* Qstep(QP, n = 0) {0.625, 0.6875, 0.8125, 0.875, 1.0, 1.125} for QP[0-5]
+* @remarks QPRange[0-51] & QstepRange[1 - 224].
+******************************************************************************
+*/
const UWORD8 gau1_h264_to_mpeg2_qmap[H264_QP_ELEM] =
{
- 1, 1, 1, 1, 1, 1, 1, 1,
- 2, 2, 2, 2, 2, 3, 3, 4,
- 4, 4, 5, 6, 6, 7, 8, 9,
- 10, 11, 12, 14, 16, 18, 20, 22,
- 25, 28, 31, 35, 40, 44, 50, 56,
- 63, 71, 79, 89, 100, 112, 126, 141,
- 158, 178, 200, 224
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 2, 2, 2, 2, 3, 3, 3, 4,
+ 4, 5, 5, 6, 7, 7, 8, 9,
+ 10, 11, 13, 14, 16, 18, 20, 22,
+ 26, 28, 32, 36, 40, 44, 52, 56,
+ 64, 72, 80, 88, 104, 112, 128, 144,
+ 160, 176, 208, 224,
};
-
const UWORD8 gau1_mpeg2_to_h264_qmap[MPEG2_QP_ELEM] =
{
- 0, 4, 10, 14, 16, 18, 20, 21,
- 22, 23, 24, 25, 26, 26, 27, 28,
- 28, 29, 29, 30, 30, 31, 31, 31,
- 32, 32, 32, 33, 33, 33, 34, 34,
- 34, 34, 35, 35, 35, 35, 36, 36,
- 36, 36, 37, 37, 37, 37, 37, 37,
- 38, 38, 38, 38, 38, 39, 39, 39,
- 39, 39, 39, 39, 40, 40, 40, 40,
- 40, 40, 40, 41, 41, 41, 41, 41,
- 41, 41, 41, 42, 42, 42, 42, 42,
- 42, 42, 42, 42, 43, 43, 43, 43,
- 43, 43, 43, 43, 43, 43, 43, 44,
- 44, 44, 44, 44, 44, 44, 44, 44,
- 44, 44, 45, 45, 45, 45, 45, 45,
- 45, 45, 45, 45, 45, 45, 45, 46,
- 46, 46, 46, 46, 46, 46, 46, 46,
- 46, 46, 46, 46, 46, 46, 47, 47,
- 47, 47, 47, 47, 47, 47, 47, 47,
- 47, 47, 47, 47, 47, 47, 48, 48,
- 48, 48, 48, 48, 48, 48, 48, 48,
- 48, 48, 48, 48, 48, 48, 48, 48,
- 49, 49, 49, 49, 49, 49, 49, 49,
- 49, 49, 49, 49, 49, 49, 49, 49,
- 49, 49, 49, 49, 49, 50, 50, 50,
- 50, 50, 50, 50, 50, 50, 50, 50,
- 50, 50, 50, 50, 50, 50, 50, 50,
- 50, 50, 50, 50, 51, 51, 51, 51,
- 51, 51, 51, 51, 51, 51, 51, 51,
- 51
+ 0, 4, 10, 13, 16, 18, 19, 21,
+ 22, 23, 24, 25, 25, 26, 27, 27,
+ 28, 28, 29, 30, 30, 30, 31, 31,
+ 31, 32, 32, 32, 33, 33, 33, 34,
+ 34, 34, 34, 35, 35, 36, 36, 36,
+ 36, 36, 36, 37, 37, 37, 37, 37,
+ 37, 38, 38, 38, 38, 38, 38, 39,
+ 39, 39, 39, 39, 39, 40, 40, 40,
+ 40, 40, 40, 40, 40, 41, 41, 41,
+ 41, 42, 42, 42, 42, 42, 42, 42,
+ 42, 42, 42, 42, 42, 43, 43, 43,
+ 43, 43, 43, 43, 43, 43, 43, 43,
+ 43, 44, 44, 44, 44, 44, 44, 44,
+ 44, 44, 44, 44, 44, 45, 45, 45,
+ 45, 45, 45, 45, 45, 45, 45, 45,
+ 45, 46, 46, 46, 46, 46, 46, 46,
+ 46, 46, 46, 46, 46, 46, 46, 46,
+ 46, 47, 47, 47, 47, 47, 47, 47,
+ 47, 48, 48, 48, 48, 48, 48, 48,
+ 48, 48, 48, 48, 48, 48, 48, 48,
+ 48, 48, 48, 48, 48, 48, 48, 48,
+ 48, 49, 49, 49, 49, 49, 49, 49,
+ 49, 49, 49, 49, 49, 49, 49, 49,
+ 49, 49, 49, 49, 49, 49, 49, 49,
+ 49, 50, 50, 50, 50, 50, 50, 50,
+ 50, 50, 50, 50, 50, 50, 50, 50,
+ 50, 50, 50, 50, 50, 50, 50, 50,
+ 50, 51, 51, 51, 51, 51, 51, 51,
+ 51, 51, 51, 51, 51, 51, 51, 51,
+ 51, 51, 51, 51, 51, 51, 51, 51,
+ 51, 52, 52, 52, 52, 52, 52, 52,
+ 52, 52, 52, 52, 52, 52, 52, 52,
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-18 19:38:37 +0000