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 | * ih264_disp_mgr.c |
| 24 | * |
| 25 | * @brief |
| 26 | * Contains function definitions for display management |
| 27 | * |
| 28 | * @author |
| 29 | * Srinivas T |
| 30 | * |
| 31 | * @par List of Functions: |
| 32 | * - ih264_disp_mgr_init() |
| 33 | * - ih264_disp_mgr_add() |
| 34 | * - ih264_disp_mgr_get() |
| 35 | * |
| 36 | * @remarks |
| 37 | * None |
| 38 | * |
| 39 | ******************************************************************************* |
| 40 | */ |
| 41 | #include <stdlib.h> |
| 42 | #include "ih264_typedefs.h" |
| 43 | #include "ih264_macros.h" |
| 44 | #include "ih264_disp_mgr.h" |
| 45 | |
| 46 | |
| 47 | /** |
| 48 | ******************************************************************************* |
| 49 | * |
| 50 | * @brief |
| 51 | * Initialization function for display buffer manager |
| 52 | * |
| 53 | * @par Description: |
| 54 | * Initializes the display buffer management structure |
| 55 | * |
| 56 | * @param[in] ps_disp_mgr |
| 57 | * Pointer to the display buffer management structure |
| 58 | * |
| 59 | * @returns none |
| 60 | * |
| 61 | * @remarks |
| 62 | * None |
| 63 | * |
| 64 | ******************************************************************************* |
| 65 | */ |
| 66 | void ih264_disp_mgr_init(disp_mgr_t *ps_disp_mgr) |
| 67 | { |
| 68 | WORD32 id; |
| 69 | |
| 70 | ps_disp_mgr->u4_last_abs_poc = DEFAULT_POC; |
| 71 | |
| 72 | for(id = 0; id < DISP_MGR_MAX_CNT; id++) |
| 73 | { |
| 74 | ps_disp_mgr->ai4_abs_poc[id] = DEFAULT_POC; |
| 75 | ps_disp_mgr->apv_ptr[id] = NULL; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | |
| 80 | /** |
| 81 | ******************************************************************************* |
| 82 | * |
| 83 | * @brief |
| 84 | * Adds a buffer to the display manager |
| 85 | * |
| 86 | * @par Description: |
| 87 | * Adds a buffer to the display buffer manager |
| 88 | * |
| 89 | * @param[in] ps_disp_mgr |
| 90 | * Pointer to the display buffer management structure |
| 91 | * |
| 92 | * @param[in] buf_id |
| 93 | * ID of the display buffer |
| 94 | * |
| 95 | * @param[in] abs_poc |
| 96 | * Absolute POC of the display buffer |
| 97 | * |
| 98 | * @param[in] pv_ptr |
| 99 | * Pointer to the display buffer |
| 100 | * |
| 101 | * @returns 0 if success, -1 otherwise |
| 102 | * |
| 103 | * @remarks |
| 104 | * None |
| 105 | * |
| 106 | ******************************************************************************* |
| 107 | */ |
| 108 | WORD32 ih264_disp_mgr_add(disp_mgr_t *ps_disp_mgr, |
| 109 | WORD32 buf_id, |
| 110 | WORD32 abs_poc, |
| 111 | void *pv_ptr) |
| 112 | { |
| 113 | if(buf_id >= DISP_MGR_MAX_CNT) |
| 114 | { |
| 115 | return (-1); |
| 116 | } |
| 117 | |
| 118 | if(ps_disp_mgr->apv_ptr[buf_id] != NULL) |
| 119 | { |
| 120 | return (-1); |
| 121 | } |
| 122 | |
| 123 | ps_disp_mgr->apv_ptr[buf_id] = pv_ptr; |
| 124 | ps_disp_mgr->ai4_abs_poc[buf_id] = abs_poc; |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | |
| 129 | /** |
| 130 | ******************************************************************************* |
| 131 | * |
| 132 | * @brief |
| 133 | * Gets the next buffer |
| 134 | * |
| 135 | * @par Description: |
| 136 | * Gets the next display buffer |
| 137 | * |
| 138 | * @param[in] ps_disp_mgr |
| 139 | * Pointer to the display buffer structure |
| 140 | * |
| 141 | * @param[out] pi4_buf_id |
| 142 | * Pointer to hold buffer id of the display buffer being returned |
| 143 | * |
| 144 | * @returns Pointer to the next display buffer |
| 145 | * |
| 146 | * @remarks |
| 147 | * None |
| 148 | * |
| 149 | ******************************************************************************* |
| 150 | */ |
| 151 | void* ih264_disp_mgr_get(disp_mgr_t *ps_disp_mgr, WORD32 *pi4_buf_id) |
| 152 | { |
| 153 | WORD32 id; |
| 154 | void *pv_ret_ptr; |
| 155 | WORD32 i4_min_poc; |
| 156 | WORD32 min_poc_id; |
| 157 | |
| 158 | |
| 159 | pv_ret_ptr = NULL; |
| 160 | i4_min_poc = 0x7FFFFFFF; |
| 161 | min_poc_id = -1; |
| 162 | |
| 163 | /* Find minimum POC */ |
| 164 | for(id = 0; id < DISP_MGR_MAX_CNT; id++) |
| 165 | { |
| 166 | if((DEFAULT_POC != ps_disp_mgr->ai4_abs_poc[id]) && |
| 167 | (ps_disp_mgr->ai4_abs_poc[id] <= i4_min_poc)) |
| 168 | { |
| 169 | i4_min_poc = ps_disp_mgr->ai4_abs_poc[id]; |
| 170 | min_poc_id = id; |
| 171 | } |
| 172 | } |
| 173 | *pi4_buf_id = min_poc_id; |
| 174 | /* If all pocs are still default_poc then return NULL */ |
| 175 | if(-1 == min_poc_id) |
| 176 | { |
| 177 | return NULL; |
| 178 | } |
| 179 | |
| 180 | pv_ret_ptr = ps_disp_mgr->apv_ptr[min_poc_id]; |
| 181 | |
| 182 | /* Set abs poc to default and apv_ptr to null so that the buffer is not returned again */ |
| 183 | ps_disp_mgr->apv_ptr[min_poc_id] = NULL; |
| 184 | ps_disp_mgr->ai4_abs_poc[min_poc_id] = DEFAULT_POC; |
| 185 | return pv_ret_ptr; |
| 186 | } |