Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 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 |
| 24 | * ih264e_cabac_structs.h |
| 25 | * |
| 26 | * @brief |
| 27 | * This file contains cabac related structure definitions. |
| 28 | * |
| 29 | * @author |
| 30 | * Doney Alex |
| 31 | * |
| 32 | * @remarks |
| 33 | * none |
| 34 | * |
| 35 | ******************************************************************************* |
| 36 | */ |
| 37 | |
| 38 | #ifndef IH264E_CABAC_STRUCTS_H_ |
| 39 | #define IH264E_CABAC_STRUCTS_H_ |
| 40 | |
| 41 | |
| 42 | |
| 43 | #define CABAC_INIT_IDC 2 |
| 44 | |
| 45 | |
| 46 | /** |
| 47 | ****************************************************************************** |
| 48 | * @brief typedef for context model |
| 49 | ****************************************************************************** |
| 50 | */ |
| 51 | |
| 52 | /* bits 0 to 5 :state |
| 53 | bit 6 :mps */ |
| 54 | typedef UWORD8 bin_ctxt_model; |
| 55 | |
| 56 | /** |
| 57 | ****************************************************************************** |
| 58 | * @brief MB info for cabac |
| 59 | ****************************************************************************** |
| 60 | */ |
| 61 | typedef struct |
| 62 | { |
| 63 | /* Neighbour availability Variables needed to get CtxtInc, for CABAC */ |
| 64 | UWORD8 u1_mb_type; /* !< macroblock type: I/P/B/SI/SP */ |
| 65 | |
| 66 | UWORD8 u1_cbp; /* !< Coded Block Pattern */ |
| 67 | UWORD8 u1_intrapred_chroma_mode; |
| 68 | |
| 69 | /*************************************************************************/ |
| 70 | /* Arrangnment of AC CSBP */ |
| 71 | /* bits: b7 b6 b5 b4 b3 b2 b1 b0 */ |
| 72 | /* CSBP: V1 V0 U1 U0 Y3 Y2 Y1 Y0 */ |
| 73 | /*************************************************************************/ |
| 74 | UWORD8 u1_yuv_ac_csbp; |
| 75 | /*************************************************************************/ |
| 76 | /* Arrangnment of DC CSBP */ |
| 77 | /* bits: b7 b6 b5 b4 b3 b2 b1 b0 */ |
| 78 | /* CSBP: x x x x x Vdc Udc Ydc */ |
| 79 | /*************************************************************************/ |
| 80 | UWORD8 u1_yuv_dc_csbp; |
| 81 | |
| 82 | WORD8 i1_ref_idx[4]; |
| 83 | UWORD8 u1_mv[4][4]; |
| 84 | } mb_info_ctxt_t; |
| 85 | |
| 86 | |
| 87 | /** |
| 88 | ****************************************************************************** |
| 89 | * @brief CSBP info for CABAC |
| 90 | ****************************************************************************** |
| 91 | */ |
| 92 | typedef struct |
| 93 | { |
| 94 | /*************************************************************************/ |
| 95 | /* Arrangnment of Luma AC CSBP for leftMb */ |
| 96 | /* bits: b7 b6 b5 b4 b3 b2 b1 b0 */ |
| 97 | /* CSBP: X X X X Y3 Y2 Y1 Y0 */ |
| 98 | /*************************************************************************/ |
| 99 | /*************************************************************************/ |
| 100 | /* Points either to u1_y_ac_csbp_top_mb or u1_y_ac_csbp_bot_mb */ |
| 101 | /*************************************************************************/ |
| 102 | UWORD8 u1_y_ac_csbp_top_mb; |
| 103 | UWORD8 u1_y_ac_csbp_bot_mb; |
| 104 | |
| 105 | /*************************************************************************/ |
| 106 | /* Arrangnment of Chroma AC CSBP for leftMb */ |
| 107 | /* bits: b7 b6 b5 b4 b3 b2 b1 b0 */ |
| 108 | /* CSBP: X X X X V1 V0 U1 U0 */ |
| 109 | /*************************************************************************/ |
| 110 | /*************************************************************************/ |
| 111 | /* Points either to u1_uv_ac_csbp_top_mb or u1_uv_ac_csbp_bot_mb */ |
| 112 | /*************************************************************************/ |
| 113 | UWORD8 u1_uv_ac_csbp_top_mb; |
| 114 | UWORD8 u1_uv_ac_csbp_bot_mb; |
| 115 | |
| 116 | /*************************************************************************/ |
| 117 | /* Arrangnment of DC CSBP */ |
| 118 | /* bits: b7 b6 b5 b4 b3 b2 b1 b0 */ |
| 119 | /* CSBP: x x x x x Vdc Udc Ydc */ |
| 120 | /*************************************************************************/ |
| 121 | /*************************************************************************/ |
| 122 | /* Points either to u1_yuv_dc_csbp_top_mb or u1_yuv_dc_csbp_bot_mb */ |
| 123 | /*************************************************************************/ |
| 124 | UWORD8 u1_yuv_dc_csbp_top_mb; |
| 125 | UWORD8 u1_yuv_dc_csbp_bot_mb; |
| 126 | } cab_csbp_t; |
| 127 | |
| 128 | /** |
| 129 | ****************************************************************************** |
| 130 | * @brief CABAC Encoding Environment |
| 131 | ****************************************************************************** |
| 132 | */ |
| 133 | |
| 134 | typedef struct |
| 135 | { |
| 136 | /** cabac interval start L */ |
| 137 | UWORD32 u4_code_int_low; |
| 138 | |
| 139 | /** cabac interval range R */ |
| 140 | UWORD32 u4_code_int_range; |
| 141 | |
| 142 | /** bytes_outsanding; number of 0xFF bits that occur during renorm |
| 143 | * These will be accumulated till the carry bit is knwon |
| 144 | */ |
| 145 | UWORD32 u4_out_standing_bytes; |
| 146 | |
| 147 | /** bits generated during renormalization |
| 148 | * A byte is put to stream/u4_out_standing_bytes from u4_low(L) when |
| 149 | * u4_bits_gen exceeds 8 |
| 150 | */ |
| 151 | UWORD32 u4_bits_gen; |
| 152 | } encoding_envirnoment_t; |
| 153 | |
| 154 | |
| 155 | /** |
| 156 | ****************************************************************************** |
| 157 | * @brief CABAC Context structure : Variables to handle Cabac |
| 158 | ****************************************************************************** |
| 159 | */ |
| 160 | typedef struct |
| 161 | { |
| 162 | |
| 163 | /* Base pointer to all the cabac contexts */ |
| 164 | bin_ctxt_model au1_cabac_ctxt_table[NUM_CABAC_CTXTS]; |
| 165 | |
| 166 | |
| 167 | cab_csbp_t s_lft_csbp; |
| 168 | |
| 169 | /** |
| 170 | * pointer to Bitstream structure |
| 171 | */ |
| 172 | bitstrm_t *ps_bitstrm; |
| 173 | |
| 174 | /* Pointer to mb_info_ctxt_t map_base */ |
| 175 | mb_info_ctxt_t *ps_mb_map_ctxt_inc_base; |
| 176 | |
| 177 | /* Pointer to encoding_envirnoment_t */ |
| 178 | encoding_envirnoment_t s_cab_enc_env; |
| 179 | |
| 180 | /* These things need to be updated at each MbLevel */ |
| 181 | |
| 182 | /* Prev ps_mb_qp_delta_ctxt */ |
| 183 | WORD8 i1_prevps_mb_qp_delta_ctxt; |
| 184 | |
| 185 | /* Pointer to mb_info_ctxt_t map */ |
| 186 | mb_info_ctxt_t *ps_mb_map_ctxt_inc; |
| 187 | |
| 188 | /* Pointer to default mb_info_ctxt_t */ |
| 189 | mb_info_ctxt_t *ps_def_ctxt_mb_info; |
| 190 | |
| 191 | /* Pointer to current mb_info_ctxt_t */ |
| 192 | mb_info_ctxt_t *ps_curr_ctxt_mb_info; |
| 193 | |
| 194 | /* Pointer to left mb_info_ctxt_t */ |
| 195 | mb_info_ctxt_t *ps_left_ctxt_mb_info; |
| 196 | |
| 197 | /* Pointer to top mb_info_ctxt_t */ |
| 198 | mb_info_ctxt_t *ps_top_ctxt_mb_info; |
| 199 | |
| 200 | /* Poniter to left csbp structure */ |
| 201 | cab_csbp_t *ps_lft_csbp; |
| 202 | UWORD8 *pu1_left_y_ac_csbp; |
| 203 | UWORD8 *pu1_left_uv_ac_csbp; |
| 204 | UWORD8 *pu1_left_yuv_dc_csbp; |
| 205 | |
| 206 | /***************************************************************************/ |
| 207 | /* Ref_idx contexts are stored in the following way */ |
| 208 | /* Array Idx 0,1 for reference indices in Forward direction */ |
| 209 | /* Array Idx 2,3 for reference indices in backward direction */ |
| 210 | /***************************************************************************/ |
| 211 | /* Dimensions for u1_left_ref_ctxt_inc_arr is [2][4] for Mbaff:Top and Bot */ |
| 212 | WORD8 i1_left_ref_idx_ctx_inc_arr[2][4]; |
| 213 | WORD8 *pi1_left_ref_idx_ctxt_inc; |
| 214 | |
| 215 | /* Dimensions for u1_left_mv_ctxt_inc_arr is [2][4][4] for Mbaff case */ |
| 216 | UWORD8 u1_left_mv_ctxt_inc_arr[2][4][4]; |
| 217 | UWORD8 (*pu1_left_mv_ctxt_inc)[4]; |
| 218 | |
| 219 | } cabac_ctxt_t; |
| 220 | |
| 221 | #endif /* IH264E_CABAC_STRUCTS_H_ */ |