1/******************************************************************************
2 *
3 * Copyright (C) 2015 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19*/
20
21/**
22******************************************************************************
23* @file ih264_cabac_tables.h
24*
25* @brief
26*  This file contains enumerations, macros and extern declarations of H264
27*  cabac tables
28*
29* @author
30*  Ittiam
31*
32* @remarks
33*  none
34******************************************************************************
35*/
36
37#ifndef IH264_CABAC_TABLES_H_
38#define IH264_CABAC_TABLES_H_
39
40/*****************************************************************************/
41/* Constant Macros                                                           */
42/*****************************************************************************/
43
44/**
45******************************************************************************
46 *  @brief  maximum range of cabac_init_idc (0-2) + 1 for ISLICE
47******************************************************************************
48 */
49#define NUM_CAB_INIT_IDC_PLUS_ONE 4
50
51/**
52******************************************************************************
53 *  @brief  max range of qps in H264 (0-51)
54******************************************************************************
55 */
56#define QP_RANGE        52
57
58/**
59******************************************************************************
60 *  @brief  max range of cabac contexts in H264 (0-459)
61******************************************************************************
62 */
63#define NUM_CABAC_CTXTS 460
64
65
66/** Macros for Cabac checks */
67/** MbType */
68/** |x|x|I_PCM|SKIP|
69 |S|Inter/Intra|P/B|NON-BD16x16/BD16x16,I16x16/I4x4| */
70#define CAB_INTRA         0x00 /* 0000 00xx */
71#define CAB_INTER         0x04 /* 0000 01xx */
72#define CAB_I4x4          0x00 /* 0000 00x0 */
73#define CAB_I16x16        0x01 /* 0000 00x1 */
74#define CAB_BD16x16       0x04 /* 0000 0100 */
75#define CAB_NON_BD16x16   0x05 /* 0000 0101 */
76#define CAB_P             0x07 /* 0000 0111 */
77#define CAB_SI4x4         0x08 /* 0000 10x0 */
78#define CAB_SI16x16       0x09 /* 0000 10x1 */
79#define CAB_SKIP_MASK     0x10 /* 0001 0000 */
80#define CAB_SKIP          0x10 /* 0001 0000 */
81#define CAB_P_SKIP        0x16 /* 0001 x11x */
82#define CAB_B_SKIP        0x14 /* 0001 x100 */
83#define CAB_BD16x16_MASK  0x07 /* 0000 0111 */
84#define CAB_INTRA_MASK    0x04 /* 0000 0100 */
85#define CAB_I_PCM         0x20 /* 001x xxxx */
86
87/**
88******************************************************************************
89 *  @enum  ctxBlockCat
90
91******************************************************************************
92*/
93typedef enum
94{
95    LUMA_DC_CTXCAT   = 0,
96    LUMA_AC_CTXCAT   = 1,
97    LUMA_4X4_CTXCAT  = 2,
98    CHROMA_DC_CTXCAT = 3,
99    CHROMA_AC_CTXCAT = 4,
100    LUMA_8X8_CTXCAT  = 5,
101    NUM_CTX_CAT      = 6
102} CTX_BLOCK_CAT;
103
104
105/**
106******************************************************************************
107 *  @enum ctxIdxOffset
108
109******************************************************************************
110*/
111typedef enum
112{
113    MB_TYPE_SI_SLICE = 0,
114    MB_TYPE_I_SLICE = 3,
115    MB_SKIP_FLAG_P_SLICE = 11,
116    MB_TYPE_P_SLICE = 14,
117    SUB_MB_TYPE_P_SLICE = 21,
118    MB_SKIP_FLAG_B_SLICE = 24,
119    MB_TYPE_B_SLICE = 27,
120    SUB_MB_TYPE_B_SLICE = 36,
121    MVD_X = 40,
122    MVD_Y = 47,
123    REF_IDX = 54,
124    MB_QP_DELTA = 60,
125    INTRA_CHROMA_PRED_MODE = 64,
126    PREV_INTRA4X4_PRED_MODE_FLAG = 68,
127    REM_INTRA4X4_PRED_MODE = 69,
128    MB_FIELD_DECODING_FLAG = 70,
129    CBP_LUMA = 73,
130    CBP_CHROMA = 77,
131    CBF = 85,
132    SIGNIFICANT_COEFF_FLAG_FRAME = 105,
133    SIGNIFICANT_COEFF_FLAG_FLD = 277,
134    LAST_SIGNIFICANT_COEFF_FLAG_FRAME = 166,
135    LAST_SIGNIFICANT_COEFF_FLAG_FLD = 338,
136    COEFF_ABS_LEVEL_MINUS1 = 227,
137
138    /* High profile related Syntax element CABAC offsets */
139    TRANSFORM_SIZE_8X8_FLAG = 399,
140    SIGNIFICANT_COEFF_FLAG_8X8_FRAME = 402,
141    LAST_SIGNIFICANT_COEFF_FLAG_8X8_FRAME = 417,
142    COEFF_ABS_LEVEL_MINUS1_8X8 = 426,
143    SIGNIFICANT_COEFF_FLAG_8X8_FIELD = 436,
144    LAST_SIGNIFICANT_COEFF_FLAG_8X8_FIELD = 451
145
146} cabac_table_num_t;
147
148
149/**
150******************************************************************************
151 *  @enum  ctxIdxOffset
152
153******************************************************************************
154*/
155typedef enum
156{
157    SIG_COEFF_CTXT_CAT_0_OFFSET = 0,
158    SIG_COEFF_CTXT_CAT_1_OFFSET = 15,
159    SIG_COEFF_CTXT_CAT_2_OFFSET = 29,
160    SIG_COEFF_CTXT_CAT_3_OFFSET = 44,
161    SIG_COEFF_CTXT_CAT_4_OFFSET = 47,
162    SIG_COEFF_CTXT_CAT_5_OFFSET = 0,
163    COEFF_ABS_LEVEL_CAT_0_OFFSET = 0,
164    COEFF_ABS_LEVEL_CAT_1_OFFSET = 10,
165    COEFF_ABS_LEVEL_CAT_2_OFFSET = 20,
166    COEFF_ABS_LEVEL_CAT_3_OFFSET = 30,
167    COEFF_ABS_LEVEL_CAT_4_OFFSET = 39,
168    COEFF_ABS_LEVEL_CAT_5_OFFSET = 0
169} cabac_blk_cat_offset_t;
170
171
172
173
174/*****************************************************************************/
175/* Extern global declarations                                                */
176/*****************************************************************************/
177
178
179/* CABAC Table declaration*/
180extern const UWORD32 gau4_ih264_cabac_table[128][4];
181
182
183/*****************************************************************************/
184/* Cabac tables for context initialization depending upon type of Slice,     */
185/* cabac init Idc value and Qp.                                              */
186/*****************************************************************************/
187extern const UWORD8 gau1_ih264_cabac_ctxt_init_table[NUM_CAB_INIT_IDC_PLUS_ONE][QP_RANGE][NUM_CABAC_CTXTS];
188
189
190#endif /* IH264_CABAC_TABLES_H_ */
191