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187 lines
4.5 KiB
187 lines
4.5 KiB
/******************************************************************************
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*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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/**
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*******************************************************************************
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* @file
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* ih264_disp_mgr.c
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*
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* @brief
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* Contains function definitions for display management
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*
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* @author
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* Srinivas T
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*
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* @par List of Functions:
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* - ih264_disp_mgr_init()
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* - ih264_disp_mgr_add()
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* - ih264_disp_mgr_get()
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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#include <stdlib.h>
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#include "ih264_typedefs.h"
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#include "ih264_macros.h"
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#include "ih264_disp_mgr.h"
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/**
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*******************************************************************************
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*
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* @brief
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* Initialization function for display buffer manager
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*
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* @par Description:
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* Initializes the display buffer management structure
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*
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* @param[in] ps_disp_mgr
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* Pointer to the display buffer management structure
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*
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* @returns none
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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void ih264_disp_mgr_init(disp_mgr_t *ps_disp_mgr)
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{
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WORD32 id;
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ps_disp_mgr->u4_last_abs_poc = DEFAULT_POC;
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for(id = 0; id < DISP_MGR_MAX_CNT; id++)
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{
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ps_disp_mgr->ai4_abs_poc[id] = DEFAULT_POC;
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ps_disp_mgr->apv_ptr[id] = NULL;
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}
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}
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/**
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*******************************************************************************
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*
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* @brief
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* Adds a buffer to the display manager
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*
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* @par Description:
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* Adds a buffer to the display buffer manager
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*
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* @param[in] ps_disp_mgr
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* Pointer to the display buffer management structure
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*
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* @param[in] buf_id
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* ID of the display buffer
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*
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* @param[in] abs_poc
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* Absolute POC of the display buffer
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*
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* @param[in] pv_ptr
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* Pointer to the display buffer
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*
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* @returns 0 if success, -1 otherwise
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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WORD32 ih264_disp_mgr_add(disp_mgr_t *ps_disp_mgr,
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WORD32 buf_id,
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WORD32 abs_poc,
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void *pv_ptr)
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{
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if(buf_id >= DISP_MGR_MAX_CNT)
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{
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return (-1);
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}
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if(ps_disp_mgr->apv_ptr[buf_id] != NULL)
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{
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return (-1);
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}
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ps_disp_mgr->apv_ptr[buf_id] = pv_ptr;
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ps_disp_mgr->ai4_abs_poc[buf_id] = abs_poc;
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return 0;
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}
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/**
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*******************************************************************************
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*
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* @brief
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* Gets the next buffer
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*
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* @par Description:
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* Gets the next display buffer
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*
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* @param[in] ps_disp_mgr
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* Pointer to the display buffer structure
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*
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* @param[out] pi4_buf_id
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* Pointer to hold buffer id of the display buffer being returned
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*
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* @returns Pointer to the next display buffer
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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void* ih264_disp_mgr_get(disp_mgr_t *ps_disp_mgr, WORD32 *pi4_buf_id)
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{
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WORD32 id;
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void *pv_ret_ptr;
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WORD32 i4_min_poc;
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WORD32 min_poc_id;
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pv_ret_ptr = NULL;
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i4_min_poc = 0x7FFFFFFF;
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min_poc_id = -1;
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/* Find minimum POC */
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for(id = 0; id < DISP_MGR_MAX_CNT; id++)
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{
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if((DEFAULT_POC != ps_disp_mgr->ai4_abs_poc[id]) &&
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(ps_disp_mgr->ai4_abs_poc[id] <= i4_min_poc))
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{
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i4_min_poc = ps_disp_mgr->ai4_abs_poc[id];
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min_poc_id = id;
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}
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}
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*pi4_buf_id = min_poc_id;
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/* If all pocs are still default_poc then return NULL */
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if(-1 == min_poc_id)
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{
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return NULL;
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}
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pv_ret_ptr = ps_disp_mgr->apv_ptr[min_poc_id];
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/* Set abs poc to default and apv_ptr to null so that the buffer is not returned again */
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ps_disp_mgr->apv_ptr[min_poc_id] = NULL;
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ps_disp_mgr->ai4_abs_poc[min_poc_id] = DEFAULT_POC;
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return pv_ret_ptr;
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}
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