1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* Copyright (C) 2014 ARM Limited. All rights reserved.
*
* Copyright (C) 2008 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.
*/
#ifndef GRALLOC_BUFFER_PRIV_H_
#define GRALLOC_BUFFER_PRIV_H_
#include "gralloc_priv.h"
#include <errno.h>
#include <string.h>
// private gralloc buffer manipulation API
struct attr_region
{
/* Rectangle to be cropped from the full frame (Origin in top-left corner!) */
int crop_top;
int crop_left;
int crop_height;
int crop_width;
int use_yuv_transform;
int use_sparse_alloc;
} __attribute__ ((packed));
typedef struct attr_region attr_region;
enum
{
/* CROP and YUV_TRANS are intended to be
* written by producers and read by consumers.
* Producers should write these parameters before
* it queues a buffer to the consumer.
*/
/* CROP RECT, defined as a int array of top, left, height, width. */
GRALLOC_ARM_BUFFER_ATTR_CROP_RECT = 1,
/* Set if the AFBC format used a YUV transform before compressing */
GRALLOC_ARM_BUFFER_ATTR_AFBC_YUV_TRANS = 2,
/* Set if the AFBC format uses sparse allocation */
GRALLOC_ARM_BUFFER_ATTR_AFBC_SPARSE_ALLOC = 3,
GRALLOC_ARM_BUFFER_ATTR_LAST
};
typedef uint32_t buf_attr;
/*
* Allocate shared memory for attribute storage. Only to be
* used by gralloc internally.
*
* Return 0 on success.
*/
int gralloc_buffer_attr_allocate( struct private_handle_t *hnd );
/*
* Frees the shared memory allocated for attribute storage.
* Only to be used by gralloc internally.
* Return 0 on success.
*/
int gralloc_buffer_attr_free( struct private_handle_t *hnd );
/*
* Map the attribute storage area before attempting to
* read/write from it.
*
* Return 0 on success.
*/
static inline int gralloc_buffer_attr_map( struct private_handle_t *hnd, int readwrite)
{
int rval = -1;
int prot_flags = PROT_READ;
if( !hnd )
goto out;
if( hnd->share_attr_fd < 0 )
{
ALOGE("Shared attribute region not available to be mapped");
goto out;
}
if( readwrite )
{
prot_flags |= PROT_WRITE;
}
hnd->attr_base = mmap( NULL, PAGE_SIZE, prot_flags, MAP_SHARED, hnd->share_attr_fd, 0 );
if(hnd->attr_base == MAP_FAILED)
{
ALOGE("Failed to mmap shared attribute region err=%s",strerror(errno));
goto out;
}
rval = 0;
out:
return rval;
}
/*
* Unmap the attribute storage area when done with it.
*
* Return 0 on success.
*/
static inline int gralloc_buffer_attr_unmap( struct private_handle_t *hnd )
{
int rval = -1;
if( !hnd )
goto out;
if( hnd->attr_base != MAP_FAILED )
{
if ( munmap( hnd->attr_base, PAGE_SIZE ) == 0 )
{
hnd->attr_base = MAP_FAILED;
rval = 0;
}
}
out:
return rval;
}
/*
* Read or write an attribute from/to the storage area.
*
* Return 0 on success.
*/
static inline int gralloc_buffer_attr_write( struct private_handle_t *hnd, buf_attr attr, int *val )
{
int rval = -1;
if( !hnd || !val || attr >= GRALLOC_ARM_BUFFER_ATTR_LAST )
goto out;
if( hnd->attr_base != MAP_FAILED )
{
attr_region *region = (attr_region *) hnd->attr_base;
switch( attr )
{
case GRALLOC_ARM_BUFFER_ATTR_CROP_RECT:
memcpy( ®ion->crop_top, val, sizeof(int)*4 );
rval = 0;
break;
case GRALLOC_ARM_BUFFER_ATTR_AFBC_YUV_TRANS:
region->use_yuv_transform = *val;
rval = 0;
break;
case GRALLOC_ARM_BUFFER_ATTR_AFBC_SPARSE_ALLOC:
region->use_sparse_alloc = *val;
rval = 0;
break;
}
}
out:
return rval;
}
static inline int gralloc_buffer_attr_read( struct private_handle_t *hnd, buf_attr attr, int *val )
{
int rval = -1;
if( !hnd || !val || attr >= GRALLOC_ARM_BUFFER_ATTR_LAST )
goto out;
if( hnd->attr_base != MAP_FAILED )
{
attr_region *region = (attr_region *) hnd->attr_base;
switch( attr )
{
case GRALLOC_ARM_BUFFER_ATTR_CROP_RECT:
memcpy( val, ®ion->crop_top, sizeof(int)*4 );
rval = 0;
break;
case GRALLOC_ARM_BUFFER_ATTR_AFBC_YUV_TRANS:
*val = region->use_yuv_transform;
rval = 0;
break;
case GRALLOC_ARM_BUFFER_ATTR_AFBC_SPARSE_ALLOC:
*val = region->use_sparse_alloc;
rval = 0;
break;
}
}
out:
return rval;
}
#endif /* GRALLOC_BUFFER_PRIV_H_ */
|
