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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_cabac_tables.h
*
* @brief
* This file contains enumerations, macros and extern declarations of H264
* cabac tables
*
* @author
* Ittiam
*
* @remarks
* none
******************************************************************************
*/
#ifndef IH264_CABAC_TABLES_H_
#define IH264_CABAC_TABLES_H_
/*****************************************************************************/
/* Constant Macros */
/*****************************************************************************/
/**
******************************************************************************
* @brief maximum range of cabac_init_idc (0-2)
******************************************************************************
*/
#define IH264_NUM_CABAC_INIT_IDC_PLUS_ONE 4
/**
******************************************************************************
* @brief max range of qps in H264 (0-51)
******************************************************************************
*/
#define IH264_MAX_QP 52
/**
******************************************************************************
* @brief max range of cabac contexts in H264 (0-459)
******************************************************************************
*/
#define IH264_NUM_CABAC_CTXTS 460
/*****************************************************************************/
/* Extern global declarations */
/*****************************************************************************/
/**
******************************************************************************
* @breif Table for rangeTabLPS depending on pStateIdx and qCodIRangeIdx
* input : pStateIdx(0-63) and qCodIRangeIdx(0-3) [(Range >> 6) & 0x3]
* output : RLps
*
* @remarks See Table 9-35 of H264 spec for rangeTabLPS
*******************************************************************************
*/
extern const UWORD8 gau1_ih264_cabac_rlps[64][4];
/**
******************************************************************************
* @breif probability+MPS state transition tables based on cur State and bin
* input : curpState[bits7-2] | curMPS[bit1] | decodedBin[bit0]
* output : nextpState[bits6-1] | nextMPS[bit0]
* @remarks Modified form of Table-9-36 State Transition table in H264 spec
******************************************************************************
*/
extern const UWORD8 gau1_ih264_next_state[128*2];
/**
******************************************************************************
* @brief Init context tables for all combinations of qp and cabac_init_idc
* @remarks Packing format MPS in lsb and pState in bits[1-6]
******************************************************************************
*/
extern const UWORD8 gau1_ih264_cab_ctxts[IH264_NUM_CABAC_INIT_IDC_PLUS_ONE][IH264_MAX_QP][IH264_NUM_CABAC_CTXTS];
#endif /* IH264_CABAC_TABLES_H_ */
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