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191 lines
6.1 KiB
191 lines
6.1 KiB
/******************************************************************************
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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 ih264_cabac_tables.h
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*
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* @brief
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* This file contains enumerations, macros and extern declarations of H264
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* cabac tables
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*
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* @author
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* Ittiam
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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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#ifndef IH264_CABAC_TABLES_H_
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#define IH264_CABAC_TABLES_H_
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/*****************************************************************************/
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/* Constant Macros */
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/*****************************************************************************/
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/**
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******************************************************************************
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* @brief maximum range of cabac_init_idc (0-2) + 1 for ISLICE
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******************************************************************************
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*/
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#define NUM_CAB_INIT_IDC_PLUS_ONE 4
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/**
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******************************************************************************
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* @brief max range of qps in H264 (0-51)
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******************************************************************************
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*/
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#define QP_RANGE 52
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/**
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******************************************************************************
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* @brief max range of cabac contexts in H264 (0-459)
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******************************************************************************
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*/
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#define NUM_CABAC_CTXTS 460
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/** Macros for Cabac checks */
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/** MbType */
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/** |x|x|I_PCM|SKIP|
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|S|Inter/Intra|P/B|NON-BD16x16/BD16x16,I16x16/I4x4| */
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#define CAB_INTRA 0x00 /* 0000 00xx */
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#define CAB_INTER 0x04 /* 0000 01xx */
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#define CAB_I4x4 0x00 /* 0000 00x0 */
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#define CAB_I16x16 0x01 /* 0000 00x1 */
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#define CAB_BD16x16 0x04 /* 0000 0100 */
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#define CAB_NON_BD16x16 0x05 /* 0000 0101 */
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#define CAB_P 0x07 /* 0000 0111 */
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#define CAB_SI4x4 0x08 /* 0000 10x0 */
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#define CAB_SI16x16 0x09 /* 0000 10x1 */
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#define CAB_SKIP_MASK 0x10 /* 0001 0000 */
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#define CAB_SKIP 0x10 /* 0001 0000 */
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#define CAB_P_SKIP 0x16 /* 0001 x11x */
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#define CAB_B_SKIP 0x14 /* 0001 x100 */
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#define CAB_BD16x16_MASK 0x07 /* 0000 0111 */
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#define CAB_INTRA_MASK 0x04 /* 0000 0100 */
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#define CAB_I_PCM 0x20 /* 001x xxxx */
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/**
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******************************************************************************
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* @enum ctxBlockCat
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******************************************************************************
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*/
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typedef enum
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{
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LUMA_DC_CTXCAT = 0,
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LUMA_AC_CTXCAT = 1,
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LUMA_4X4_CTXCAT = 2,
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CHROMA_DC_CTXCAT = 3,
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CHROMA_AC_CTXCAT = 4,
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LUMA_8X8_CTXCAT = 5,
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NUM_CTX_CAT = 6
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} CTX_BLOCK_CAT;
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/**
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******************************************************************************
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* @enum ctxIdxOffset
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******************************************************************************
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*/
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typedef enum
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{
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MB_TYPE_SI_SLICE = 0,
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MB_TYPE_I_SLICE = 3,
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MB_SKIP_FLAG_P_SLICE = 11,
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MB_TYPE_P_SLICE = 14,
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SUB_MB_TYPE_P_SLICE = 21,
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MB_SKIP_FLAG_B_SLICE = 24,
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MB_TYPE_B_SLICE = 27,
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SUB_MB_TYPE_B_SLICE = 36,
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MVD_X = 40,
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MVD_Y = 47,
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REF_IDX = 54,
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MB_QP_DELTA = 60,
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INTRA_CHROMA_PRED_MODE = 64,
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PREV_INTRA4X4_PRED_MODE_FLAG = 68,
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REM_INTRA4X4_PRED_MODE = 69,
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MB_FIELD_DECODING_FLAG = 70,
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CBP_LUMA = 73,
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CBP_CHROMA = 77,
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CBF = 85,
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SIGNIFICANT_COEFF_FLAG_FRAME = 105,
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SIGNIFICANT_COEFF_FLAG_FLD = 277,
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LAST_SIGNIFICANT_COEFF_FLAG_FRAME = 166,
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LAST_SIGNIFICANT_COEFF_FLAG_FLD = 338,
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COEFF_ABS_LEVEL_MINUS1 = 227,
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/* High profile related Syntax element CABAC offsets */
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TRANSFORM_SIZE_8X8_FLAG = 399,
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SIGNIFICANT_COEFF_FLAG_8X8_FRAME = 402,
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LAST_SIGNIFICANT_COEFF_FLAG_8X8_FRAME = 417,
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COEFF_ABS_LEVEL_MINUS1_8X8 = 426,
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SIGNIFICANT_COEFF_FLAG_8X8_FIELD = 436,
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LAST_SIGNIFICANT_COEFF_FLAG_8X8_FIELD = 451
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} cabac_table_num_t;
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/**
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******************************************************************************
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* @enum ctxIdxOffset
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******************************************************************************
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*/
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typedef enum
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{
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SIG_COEFF_CTXT_CAT_0_OFFSET = 0,
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SIG_COEFF_CTXT_CAT_1_OFFSET = 15,
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SIG_COEFF_CTXT_CAT_2_OFFSET = 29,
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SIG_COEFF_CTXT_CAT_3_OFFSET = 44,
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SIG_COEFF_CTXT_CAT_4_OFFSET = 47,
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SIG_COEFF_CTXT_CAT_5_OFFSET = 0,
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COEFF_ABS_LEVEL_CAT_0_OFFSET = 0,
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COEFF_ABS_LEVEL_CAT_1_OFFSET = 10,
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COEFF_ABS_LEVEL_CAT_2_OFFSET = 20,
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COEFF_ABS_LEVEL_CAT_3_OFFSET = 30,
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COEFF_ABS_LEVEL_CAT_4_OFFSET = 39,
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COEFF_ABS_LEVEL_CAT_5_OFFSET = 0
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} cabac_blk_cat_offset_t;
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/*****************************************************************************/
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/* Extern global declarations */
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/*****************************************************************************/
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/* CABAC Table declaration*/
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extern const UWORD32 gau4_ih264_cabac_table[128][4];
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/*****************************************************************************/
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/* Cabac tables for context initialization depending upon type of Slice, */
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/* cabac init Idc value and Qp. */
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/*****************************************************************************/
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extern const UWORD8 gau1_ih264_cabac_ctxt_init_table[NUM_CAB_INIT_IDC_PLUS_ONE][QP_RANGE][NUM_CABAC_CTXTS];
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#endif /* IH264_CABAC_TABLES_H_ */
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