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