1/******************************************************************************
2 *
3 * Copyright (C) 2015 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19*/
20/**
21*******************************************************************************
22* @file
23*  ih264_deblk_tables.c
24*
25* @brief
26*  Contains tables used for deblocking
27*
28* @author
29*  Ittiam
30*
31* @par List of Tables:
32*  - guc_ih264_qp_scale_cr[]
33*  - guc_ih264_alpha_table[]
34*  - guc_ih264_beta_table[]
35*  - guc_ih264_clip_table[][]
36*
37* @remarks
38*  None
39*
40*******************************************************************************
41*/
42
43/*****************************************************************************/
44/* File Includes                                                             */
45/*****************************************************************************/
46
47/* System include files */
48#include <stdio.h>
49
50/* User include files */
51#include "ih264_typedefs.h"
52#include "ih264_deblk_tables.h"
53
54/*****************************************************************************/
55/* Extern global definitions                                                 */
56/*****************************************************************************/
57
58/**
59 ******************************************************************************
60 * @brief  alpha & beta tables for deblocking
61 * input   : indexA [0-51] & indexB [0-51]
62 * output  : alpha & beta
63 *
64 * @remarks Table 8-16 � in H264 Specification,
65 * Derivation of offset dependent threshold variables
66 *  alpha and beta from indexA and indexB
67 ******************************************************************************
68 */
69const UWORD8 gu1_ih264_alpha_table[52] =
70{
71     /* indexA :: 0-51 inclusive */
72     0,     0,     0,     0,     0,     0,     0,     0,
73     0,     0,     0,     0,     0,     0,     0,     0,
74     4,     4,     5,     6,     7,     8,     9,    10,
75    12,    13,    15,    17,    20,    22,    25,    28,
76    32,    36,    40,    45,    50,    56,    63,    71,
77    80,    90,   101,   113,   127,   144,   162,   182,
78   203,   226,   255,   255,
79};
80
81const UWORD8 gu1_ih264_beta_table[52] =
82{
83     /* indexB :: 0-51 inclusive */
84     0,     0,     0,     0,     0,     0,     0,     0,
85     0,     0,     0,     0,     0,     0,     0,     0,
86     2,     2,     2,     3,     3,     3,     3,     4,
87     4,     4,     6,     6,     7,     7,     8,     8,
88     9,     9,    10,    10,    11,    11,    12,    12,
89    13,    13,    14,    14,    15,    15,    16,    16,
90    17,    17,    18,    18,
91};
92
93/**
94 ******************************************************************************
95 * @brief  t'C0 table for deblocking
96 * input   : indexA [0-51] and bS [1,3]
97 * output  : t'C0
98 *
99 * @remarks Table 8-17 � in H264 Specification,
100 * Value of variable t'C0 as a function of indexA and bS
101 ******************************************************************************
102 */
103const UWORD8 gu1_ih264_clip_table[52][4] =
104{
105    /* indexA :: 0-51 inclusive */
106    { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0},
107    { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0},
108    { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0},
109    { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0},
110    { 0, 0, 0, 0}, { 0, 0, 0, 1}, { 0, 0, 0, 1}, { 0, 0, 0, 1},
111    { 0, 0, 0, 1}, { 0, 0, 1, 1}, { 0, 0, 1, 1}, { 0, 1, 1, 1},
112    { 0, 1, 1, 1}, { 0, 1, 1, 1}, { 0, 1, 1, 1}, { 0, 1, 1, 2},
113    { 0, 1, 1, 2}, { 0, 1, 1, 2}, { 0, 1, 1, 2}, { 0, 1, 2, 3},
114    { 0, 1, 2, 3}, { 0, 2, 2, 3}, { 0, 2, 2, 4}, { 0, 2, 3, 4},
115    { 0, 2, 3, 4}, { 0, 3, 3, 5}, { 0, 3, 4, 6}, { 0, 3, 4, 6},
116    { 0, 4, 5, 7}, { 0, 4, 5, 8}, { 0, 4, 6, 9}, { 0, 5, 7,10},
117    { 0, 6, 8,11}, { 0, 6, 8,13}, { 0, 7,10,14}, { 0, 8,11,16},
118    { 0, 9,12,18}, { 0,10,13,20}, { 0,11,15,23}, { 0,13,17,25},
119};
120