Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +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 | * @file |
| 23 | * ime.h |
| 24 | * |
| 25 | * @brief |
| 26 | * Contains declarations of global variables for H264 encoder |
| 27 | * |
| 28 | * @author |
| 29 | * Ittiam |
| 30 | * |
| 31 | * @remarks |
| 32 | * |
| 33 | ******************************************************************************* |
| 34 | */ |
| 35 | |
| 36 | #ifndef IME_H_ |
| 37 | #define IME_H_ |
| 38 | |
| 39 | /*****************************************************************************/ |
| 40 | /* Constant Macros */ |
| 41 | /*****************************************************************************/ |
| 42 | |
| 43 | /** |
| 44 | ****************************************************************************** |
| 45 | * @brief Number of iterations before exiting during diamond search |
| 46 | ****************************************************************************** |
| 47 | */ |
| 48 | #define NUM_LAYERS 16 |
| 49 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 50 | /*****************************************************************************/ |
| 51 | /* Extern Function Declarations */ |
| 52 | /*****************************************************************************/ |
| 53 | |
| 54 | |
| 55 | /** |
| 56 | ******************************************************************************* |
| 57 | * |
| 58 | * @brief Diamond Search |
| 59 | * |
| 60 | * @par Description: |
| 61 | * This function computes the sad at vertices of several layers of diamond grid |
| 62 | * at a time. The number of layers of diamond grid that would be evaluated is |
| 63 | * configurable.The function computes the sad at vertices of a diamond grid. If |
| 64 | * the sad at the center of the diamond grid is lesser than the sad at any other |
| 65 | * point of the diamond grid, the function marks the candidate Mb partition as |
| 66 | * mv. |
| 67 | * |
| 68 | * @param[in] ps_mb_part |
| 69 | * pointer to current mb partition ctxt with respect to ME |
| 70 | * |
| 71 | * @param[in] ps_me_ctxt |
| 72 | * pointer to me context |
| 73 | * |
| 74 | * @param[in] u4_lambda |
| 75 | * lambda motion |
| 76 | * |
| 77 | * @param[in] u4_fast_flag |
| 78 | * enable/disable fast sad computation |
| 79 | * |
| 80 | * @returns mv pair & corresponding distortion and cost |
| 81 | * |
| 82 | * @remarks This module cannot be part of the final product due to its lack of |
| 83 | * computational feasibility. This is only for quality eval purposes. |
| 84 | * |
| 85 | ******************************************************************************* |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 86 | */ |
| 87 | extern void ime_diamond_search_16x16(me_ctxt_t *ps_me_ctxt, WORD32 i4_reflist); |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 88 | |
| 89 | |
| 90 | /** |
| 91 | ******************************************************************************* |
| 92 | * |
| 93 | * @brief This function computes the best motion vector among the tentative mv |
| 94 | * candidates chosen. |
| 95 | * |
| 96 | * @par Description: |
| 97 | * This function determines the position in the search window at which the motion |
| 98 | * estimation should begin in order to minimise the number of search iterations. |
| 99 | * |
| 100 | * @param[in] ps_mb_part |
| 101 | * pointer to current mb partition ctxt with respect to ME |
| 102 | * |
| 103 | * @param[in] u4_lambda_motion |
| 104 | * lambda motion |
| 105 | * |
| 106 | * @param[in] u4_fast_flag |
| 107 | * enable/disable fast sad computation |
| 108 | * |
| 109 | * @returns mv pair & corresponding distortion and cost |
| 110 | * |
| 111 | * @remarks none |
| 112 | * |
| 113 | ******************************************************************************* |
| 114 | */ |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 115 | extern void ime_evaluate_init_srchposn_16x16(me_ctxt_t *ps_me_ctxt, |
| 116 | WORD32 i4_reflist); |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 117 | |
| 118 | /** |
| 119 | ******************************************************************************* |
| 120 | * |
| 121 | * @brief Searches for the best matching full pixel predictor within the search |
| 122 | * range |
| 123 | * |
| 124 | * @par Description: |
| 125 | * This function begins by computing the mv predict vector for the current mb. |
| 126 | * This is used for cost computations. Further basing on the algo. chosen, it |
| 127 | * looks through a set of candidate vectors that best represent the mb a least |
| 128 | * cost and returns this information. |
| 129 | * |
| 130 | * @param[in] ps_proc |
| 131 | * pointer to current proc ctxt |
| 132 | * |
| 133 | * @param[in] ps_me_ctxt |
| 134 | * pointer to me context |
| 135 | * |
| 136 | * @returns mv pair & corresponding distortion and cost |
| 137 | * |
| 138 | * @remarks none |
| 139 | * |
| 140 | ******************************************************************************* |
| 141 | */ |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 142 | extern void ime_full_pel_motion_estimation_16x16(me_ctxt_t *ps_me_ctxt, |
| 143 | WORD32 i4_ref_list); |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 144 | |
| 145 | /** |
| 146 | ******************************************************************************* |
| 147 | * |
| 148 | * @brief Searches for the best matching sub pixel predictor within the search |
| 149 | * range |
| 150 | * |
| 151 | * @par Description: |
| 152 | * This function begins by searching across all sub pixel sample points |
| 153 | * around the full pel motion vector. The vector with least cost is chosen as |
| 154 | * the mv for the current mb. If the skip mode is not evaluated while analysing |
| 155 | * the initial search candidates then analyse it here and update the mv. |
| 156 | * |
| 157 | * @param[in] ps_proc |
| 158 | * pointer to current proc ctxt |
| 159 | * |
| 160 | * @param[in] ps_me_ctxt |
| 161 | * pointer to me context |
| 162 | * |
| 163 | * @returns none |
| 164 | * |
| 165 | * @remarks none |
| 166 | * |
| 167 | ******************************************************************************* |
| 168 | */ |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 169 | extern void ime_sub_pel_motion_estimation_16x16(me_ctxt_t *ps_me_ctxt, |
| 170 | WORD32 i4_reflist); |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 171 | |
| 172 | /** |
| 173 | ******************************************************************************* |
| 174 | * |
| 175 | * @brief This function computes cost of skip macroblocks |
| 176 | * |
| 177 | * @par Description: |
| 178 | * |
| 179 | * @param[in] ps_me_ctxt |
| 180 | * pointer to me ctxt |
| 181 | * |
| 182 | * @param[in] ps_skip_mv |
| 183 | * pointer to skip mv |
| 184 | * |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 185 | @param[in] is_slice_type_b |
| 186 | * Whether slice type is BSLICE or not |
| 187 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 188 | * @returns none |
| 189 | * |
| 190 | * @remarks |
| 191 | * NOTE: while computing the skip cost, do not enable early exit from compute |
| 192 | * sad function because, a negative bias gets added later |
| 193 | * |
| 194 | ******************************************************************************* |
| 195 | */ |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 196 | extern void ime_compute_skip_cost(me_ctxt_t *ps_me_ctxt, |
| 197 | ime_mv_t *ps_skip_mv, |
| 198 | mb_part_ctxt *ps_smb_part_info, |
| 199 | UWORD32 u4_use_stat_sad, |
| 200 | WORD32 i4_reflist, |
| 201 | WORD32 is_slice_type_b); |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 202 | |
| 203 | |
| 204 | #endif /* IME_H_ */ |