/******************************************************************************
*
* 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) + 1 for ISLICE
******************************************************************************
*/
#define NUM_CAB_INIT_IDC_PLUS_ONE 4
/**
******************************************************************************
* @brief max range of qps in H264 (0-51)
******************************************************************************
*/
#define QP_RANGE 52
/**
******************************************************************************
* @brief max range of cabac contexts in H264 (0-459)
******************************************************************************
*/
#define NUM_CABAC_CTXTS 460
/** Macros for Cabac checks */
/** MbType */
/** |x|x|I_PCM|SKIP|
|S|Inter/Intra|P/B|NON-BD16x16/BD16x16,I16x16/I4x4| */
#define CAB_INTRA 0x00 /* 0000 00xx */
#define CAB_INTER 0x04 /* 0000 01xx */
#define CAB_I4x4 0x00 /* 0000 00x0 */
#define CAB_I16x16 0x01 /* 0000 00x1 */
#define CAB_BD16x16 0x04 /* 0000 0100 */
#define CAB_NON_BD16x16 0x05 /* 0000 0101 */
#define CAB_P 0x07 /* 0000 0111 */
#define CAB_SI4x4 0x08 /* 0000 10x0 */
#define CAB_SI16x16 0x09 /* 0000 10x1 */
#define CAB_SKIP_MASK 0x10 /* 0001 0000 */
#define CAB_SKIP 0x10 /* 0001 0000 */
#define CAB_P_SKIP 0x16 /* 0001 x11x */
#define CAB_B_SKIP 0x14 /* 0001 x100 */
#define CAB_BD16x16_MASK 0x07 /* 0000 0111 */
#define CAB_INTRA_MASK 0x04 /* 0000 0100 */
#define CAB_I_PCM 0x20 /* 001x xxxx */
/**
******************************************************************************
* @enum ctxBlockCat
******************************************************************************
*/
typedef enum
{
LUMA_DC_CTXCAT = 0,
LUMA_AC_CTXCAT = 1,
LUMA_4X4_CTXCAT = 2,
CHROMA_DC_CTXCAT = 3,
CHROMA_AC_CTXCAT = 4,
LUMA_8X8_CTXCAT = 5,
NUM_CTX_CAT = 6
} CTX_BLOCK_CAT;
/**
******************************************************************************
* @enum ctxIdxOffset
******************************************************************************
*/
typedef enum
{
MB_TYPE_SI_SLICE = 0,
MB_TYPE_I_SLICE = 3,
MB_SKIP_FLAG_P_SLICE = 11,
MB_TYPE_P_SLICE = 14,
SUB_MB_TYPE_P_SLICE = 21,
MB_SKIP_FLAG_B_SLICE = 24,
MB_TYPE_B_SLICE = 27,
SUB_MB_TYPE_B_SLICE = 36,
MVD_X = 40,
MVD_Y = 47,
REF_IDX = 54,
MB_QP_DELTA = 60,
INTRA_CHROMA_PRED_MODE = 64,
PREV_INTRA4X4_PRED_MODE_FLAG = 68,
REM_INTRA4X4_PRED_MODE = 69,
MB_FIELD_DECODING_FLAG = 70,
CBP_LUMA = 73,
CBP_CHROMA = 77,
CBF = 85,
SIGNIFICANT_COEFF_FLAG_FRAME = 105,
SIGNIFICANT_COEFF_FLAG_FLD = 277,
LAST_SIGNIFICANT_COEFF_FLAG_FRAME = 166,
LAST_SIGNIFICANT_COEFF_FLAG_FLD = 338,
COEFF_ABS_LEVEL_MINUS1 = 227,
/* High profile related Syntax element CABAC offsets */
TRANSFORM_SIZE_8X8_FLAG = 399,
SIGNIFICANT_COEFF_FLAG_8X8_FRAME = 402,
LAST_SIGNIFICANT_COEFF_FLAG_8X8_FRAME = 417,
COEFF_ABS_LEVEL_MINUS1_8X8 = 426,
SIGNIFICANT_COEFF_FLAG_8X8_FIELD = 436,
LAST_SIGNIFICANT_COEFF_FLAG_8X8_FIELD = 451
} cabac_table_num_t;
/**
******************************************************************************
* @enum ctxIdxOffset
******************************************************************************
*/
typedef enum
{
SIG_COEFF_CTXT_CAT_0_OFFSET = 0,
SIG_COEFF_CTXT_CAT_1_OFFSET = 15,
SIG_COEFF_CTXT_CAT_2_OFFSET = 29,
SIG_COEFF_CTXT_CAT_3_OFFSET = 44,
SIG_COEFF_CTXT_CAT_4_OFFSET = 47,
SIG_COEFF_CTXT_CAT_5_OFFSET = 0,
COEFF_ABS_LEVEL_CAT_0_OFFSET = 0,
COEFF_ABS_LEVEL_CAT_1_OFFSET = 10,
COEFF_ABS_LEVEL_CAT_2_OFFSET = 20,
COEFF_ABS_LEVEL_CAT_3_OFFSET = 30,
COEFF_ABS_LEVEL_CAT_4_OFFSET = 39,
COEFF_ABS_LEVEL_CAT_5_OFFSET = 0
} cabac_blk_cat_offset_t;
/*****************************************************************************/
/* Extern global declarations */
/*****************************************************************************/
/* CABAC Table declaration*/
extern const UWORD32 gau4_ih264_cabac_table[128][4];
/*****************************************************************************/
/* Cabac tables for context initialization depending upon type of Slice, */
/* cabac init Idc value and Qp. */
/*****************************************************************************/
extern const UWORD8 gau1_ih264_cabac_ctxt_init_table[NUM_CAB_INIT_IDC_PLUS_ONE][QP_RANGE][NUM_CABAC_CTXTS];
#endif /* IH264_CABAC_TABLES_H_ */