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