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 * ih264_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 * - ih264_disp_mgr_init()
33 * - ih264_disp_mgr_add()
34 * - ih264_disp_mgr_get()
35 *
36 * @remarks
37 * None
38 *
39 *******************************************************************************
40 */
41 #include <stdlib.h>
42 #include "ih264_typedefs.h"
43 #include "ih264_macros.h"
44 #include "ih264_disp_mgr.h"
45
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 */
ih264_disp_mgr_init(disp_mgr_t * ps_disp_mgr)66 void ih264_disp_mgr_init(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 display 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 */
ih264_disp_mgr_add(disp_mgr_t * ps_disp_mgr,WORD32 buf_id,WORD32 abs_poc,void * pv_ptr)108 WORD32 ih264_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 */
ih264_disp_mgr_get(disp_mgr_t * ps_disp_mgr,WORD32 * pi4_buf_id)151 void* ih264_disp_mgr_get(disp_mgr_t *ps_disp_mgr, WORD32 *pi4_buf_id)
152 {
153 WORD32 id;
154 void *pv_ret_ptr;
155 WORD32 i4_min_poc;
156 WORD32 min_poc_id;
157
158
159 pv_ret_ptr = NULL;
160 i4_min_poc = 0x7FFFFFFF;
161 min_poc_id = -1;
162
163 /* Find minimum POC */
164 for(id = 0; id < DISP_MGR_MAX_CNT; id++)
165 {
166 if((DEFAULT_POC != ps_disp_mgr->ai4_abs_poc[id]) &&
167 (ps_disp_mgr->ai4_abs_poc[id] <= i4_min_poc))
168 {
169 i4_min_poc = ps_disp_mgr->ai4_abs_poc[id];
170 min_poc_id = id;
171 }
172 }
173 *pi4_buf_id = min_poc_id;
174 /* If all pocs are still default_poc then return NULL */
175 if(-1 == min_poc_id)
176 {
177 return NULL;
178 }
179
180 pv_ret_ptr = ps_disp_mgr->apv_ptr[min_poc_id];
181
182 /* Set abs poc to default and apv_ptr to null so that the buffer is not returned again */
183 ps_disp_mgr->apv_ptr[min_poc_id] = NULL;
184 ps_disp_mgr->ai4_abs_poc[min_poc_id] = DEFAULT_POC;
185 return pv_ret_ptr;
186 }
187