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* impeg2_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* - impeg2_disp_mgr_init() 33* - impeg2_disp_mgr_add() 34* - impeg2_disp_mgr_get() 35* 36* @remarks 37* None 38* 39******************************************************************************* 40*/ 41#include <stdio.h> 42#include <stdlib.h> 43#include "iv_datatypedef.h" 44#include "impeg2_defs.h" 45#include "impeg2_disp_mgr.h" 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*/ 66void impeg2_disp_mgr_init( 67 disp_mgr_t *ps_disp_mgr) 68{ 69 WORD32 id; 70 71 72 for(id = 0; id < DISP_MGR_MAX_CNT; id++) 73 { 74 ps_disp_mgr->apv_ptr[id] = NULL; 75 } 76 77 ps_disp_mgr->i4_wr_idx = 0; 78 ps_disp_mgr->i4_rd_idx = 0; 79} 80 81 82/** 83******************************************************************************* 84* 85* @brief 86* Adds a buffer to the display manager 87* 88* @par Description: 89* Adds a buffer to the display buffer manager 90* 91* @param[in] ps_disp_mgr 92* Pointer to the diaplay buffer management structure 93* 94* @param[in] buf_id 95* ID of the display buffer 96* 97* @param[in] abs_poc 98* Absolute POC of the display buffer 99* 100* @param[in] pv_ptr 101* Pointer to the display buffer 102* 103* @returns 0 if success, -1 otherwise 104* 105* @remarks 106* None 107* 108******************************************************************************* 109*/ 110WORD32 impeg2_disp_mgr_add(disp_mgr_t *ps_disp_mgr, 111 void *pv_ptr, 112 WORD32 i4_buf_id) 113{ 114 115 116 WORD32 id; 117 id = ps_disp_mgr->i4_wr_idx % DISP_MGR_MAX_CNT; 118 119 ps_disp_mgr->apv_ptr[id] = pv_ptr; 120 ps_disp_mgr->ai4_buf_id[id] = i4_buf_id; 121 ps_disp_mgr->i4_wr_idx++; 122 123 return 0; 124} 125 126 127/** 128******************************************************************************* 129* 130* @brief 131* Gets the next buffer 132* 133* @par Description: 134* Gets the next display buffer 135* 136* @param[in] ps_disp_mgr 137* Pointer to the display buffer structure 138* 139* @param[out] pi4_buf_id 140* Pointer to hold buffer id of the display buffer being returned 141* 142* @returns Pointer to the next display buffer 143* 144* @remarks 145* None 146* 147******************************************************************************* 148*/ 149void* impeg2_disp_mgr_get(disp_mgr_t *ps_disp_mgr, WORD32 *pi4_buf_id) 150{ 151 WORD32 id; 152 153 *pi4_buf_id = -1; 154 155 if(ps_disp_mgr->i4_rd_idx < ps_disp_mgr->i4_wr_idx) 156 { 157 id = ps_disp_mgr->i4_rd_idx % DISP_MGR_MAX_CNT; 158 if(NULL == ps_disp_mgr->apv_ptr[id]) 159 { 160 return NULL; 161 } 162 163 *pi4_buf_id = ps_disp_mgr->ai4_buf_id[id]; 164 165 ps_disp_mgr->i4_rd_idx++; 166 167 return ps_disp_mgr->apv_ptr[id]; 168 } 169 else 170 return NULL; 171 172} 173