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