1/******************************************************************************
2*
3* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
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/**
19*******************************************************************************
20* @file
21*  ihevc_disp_mgr.c
22*
23* @brief
24*  Contains function definitions for display management
25*
26* @author
27*  Srinivas T
28*
29* @par List of Functions:
30*   - ihevc_disp_mgr_init()
31*   - ihevc_disp_mgr_add()
32*   - ihevc_disp_mgr_get()
33*
34* @remarks
35*  None
36*
37*******************************************************************************
38*/
39#include <stdlib.h>
40#include "ihevc_typedefs.h"
41#include "ihevc_macros.h"
42#include "ihevc_func_selector.h"
43#include "ihevc_disp_mgr.h"
44
45
46/**
47*******************************************************************************
48*
49* @brief
50*    Initialization function for display buffer manager
51*
52* @par Description:
53*    Initializes the display buffer management structure
54*
55* @param[in] ps_disp_mgr
56*  Pointer to the display buffer management structure
57*
58* @returns none
59*
60* @remarks
61*  None
62*
63*******************************************************************************
64*/
65void ihevc_disp_mgr_init(
66                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 diaplay 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*/
108WORD32 ihevc_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*/
151void* ihevc_disp_mgr_get(
152                disp_mgr_t *ps_disp_mgr,
153                WORD32 *pi4_buf_id)
154{
155    WORD32 id;
156    void *pv_ret_ptr;
157    WORD32 i4_min_poc;
158    WORD32 min_poc_id;
159
160
161    pv_ret_ptr = NULL;
162    i4_min_poc = 0x7FFFFFFF;
163    min_poc_id = -1;
164
165    /* Find minimum POC */
166    for(id = 0; id < DISP_MGR_MAX_CNT; id++)
167    {
168        if((DEFAULT_POC != ps_disp_mgr->ai4_abs_poc[id]) &&
169                        (ps_disp_mgr->ai4_abs_poc[id] <= i4_min_poc))
170        {
171            i4_min_poc = ps_disp_mgr->ai4_abs_poc[id];
172            min_poc_id = id;
173        }
174    }
175    *pi4_buf_id = min_poc_id;
176    /* If all pocs are still default_poc then return NULL */
177    if(-1 == min_poc_id)
178    {
179        return NULL;
180    }
181
182    pv_ret_ptr = ps_disp_mgr->apv_ptr[min_poc_id];
183
184    /* Set abs poc to default and apv_ptr to null so that the buffer is not returned again */
185    ps_disp_mgr->apv_ptr[min_poc_id] = NULL;
186    ps_disp_mgr->ai4_abs_poc[min_poc_id] = DEFAULT_POC;
187    return pv_ret_ptr;
188}
189