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/******************************************************************************
*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*****************************************************************************
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/
/**
*******************************************************************************
* @file
* ih264_deblk_tables.c
*
* @brief
* Contains tables used for deblocking
*
* @author
* Ittiam
*
* @par List of Tables:
* - guc_ih264_qp_scale_cr[]
* - guc_ih264_alpha_table[]
* - guc_ih264_beta_table[]
* - guc_ih264_clip_table[][]
*
* @remarks
* None
*
*******************************************************************************
*/
/*****************************************************************************/
/* File Includes */
/*****************************************************************************/
/* System include files */
#include <stdio.h>
/* User include files */
#include "ih264_typedefs.h"
#include "ih264_deblk_tables.h"
/*****************************************************************************/
/* Extern global definitions */
/*****************************************************************************/
/**
******************************************************************************
* @brief alpha & beta tables for deblocking
* input : indexA [0-51] & indexB [0-51]
* output : alpha & beta
*
* @remarks Table 8-16 – in H264 Specification,
* Derivation of offset dependent threshold variables
* alpha and beta from indexA and indexB
******************************************************************************
*/
const UWORD8 gu1_ih264_alpha_table[52] =
{
/* indexA :: 0-51 inclusive */
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
4, 4, 5, 6, 7, 8, 9, 10,
12, 13, 15, 17, 20, 22, 25, 28,
32, 36, 40, 45, 50, 56, 63, 71,
80, 90, 101, 113, 127, 144, 162, 182,
203, 226, 255, 255,
};
const UWORD8 gu1_ih264_beta_table[52] =
{
/* indexB :: 0-51 inclusive */
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
2, 2, 2, 3, 3, 3, 3, 4,
4, 4, 6, 6, 7, 7, 8, 8,
9, 9, 10, 10, 11, 11, 12, 12,
13, 13, 14, 14, 15, 15, 16, 16,
17, 17, 18, 18,
};
/**
******************************************************************************
* @brief t'C0 table for deblocking
* input : indexA [0-51] and bS [1,3]
* output : t'C0
*
* @remarks Table 8-17 – in H264 Specification,
* Value of variable t'C0 as a function of indexA and bS
******************************************************************************
*/
const UWORD8 gu1_ih264_clip_table[52][4] =
{
/* indexA :: 0-51 inclusive */
{ 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0},
{ 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0},
{ 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0},
{ 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0}, { 0, 0, 0, 0},
{ 0, 0, 0, 0}, { 0, 0, 0, 1}, { 0, 0, 0, 1}, { 0, 0, 0, 1},
{ 0, 0, 0, 1}, { 0, 0, 1, 1}, { 0, 0, 1, 1}, { 0, 1, 1, 1},
{ 0, 1, 1, 1}, { 0, 1, 1, 1}, { 0, 1, 1, 1}, { 0, 1, 1, 2},
{ 0, 1, 1, 2}, { 0, 1, 1, 2}, { 0, 1, 1, 2}, { 0, 1, 2, 3},
{ 0, 1, 2, 3}, { 0, 2, 2, 3}, { 0, 2, 2, 4}, { 0, 2, 3, 4},
{ 0, 2, 3, 4}, { 0, 3, 3, 5}, { 0, 3, 4, 6}, { 0, 3, 4, 6},
{ 0, 4, 5, 7}, { 0, 4, 5, 8}, { 0, 4, 6, 9}, { 0, 5, 7,10},
{ 0, 6, 8,11}, { 0, 6, 8,13}, { 0, 7,10,14}, { 0, 8,11,16},
{ 0, 9,12,18}, { 0,10,13,20}, { 0,11,15,23}, { 0,13,17,25},
};
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