1 /*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <system/camera_metadata.h>
18
19 //#define LOG_NDEBUG 0
20 #define LOG_TAG "Metadata"
21 #include <cutils/log.h>
22
23 #define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
24 #include <utils/Trace.h>
25
26 #include "Metadata.h"
27
28 namespace default_camera_hal {
29
Metadata()30 Metadata::Metadata():
31 mData(NULL)
32 {
33 }
34
~Metadata()35 Metadata::~Metadata()
36 {
37 replace(NULL);
38 }
39
replace(camera_metadata_t * m)40 void Metadata::replace(camera_metadata_t *m)
41 {
42 if (m == mData) {
43 ALOGE("%s: Replacing metadata with itself?!", __func__);
44 return;
45 }
46 if (mData)
47 free_camera_metadata(mData);
48 mData = m;
49 }
50
init(const camera_metadata_t * metadata)51 int Metadata::init(const camera_metadata_t *metadata)
52 {
53 camera_metadata_t* tmp;
54
55 if (!validate_camera_metadata_structure(metadata, NULL))
56 return -EINVAL;
57
58 tmp = clone_camera_metadata(metadata);
59 if (tmp == NULL)
60 return -EINVAL;
61
62 replace(tmp);
63 return 0;
64 }
65
addUInt8(uint32_t tag,int count,const uint8_t * data)66 int Metadata::addUInt8(uint32_t tag, int count, const uint8_t *data)
67 {
68 if (!validate(tag, TYPE_BYTE, count)) return -EINVAL;
69 return add(tag, count, data);
70 }
71
add1UInt8(uint32_t tag,const uint8_t data)72 int Metadata::add1UInt8(uint32_t tag, const uint8_t data)
73 {
74 return addUInt8(tag, 1, &data);
75 }
76
addInt32(uint32_t tag,int count,const int32_t * data)77 int Metadata::addInt32(uint32_t tag, int count, const int32_t *data)
78 {
79 if (!validate(tag, TYPE_INT32, count)) return -EINVAL;
80 return add(tag, count, data);
81 }
82
addFloat(uint32_t tag,int count,const float * data)83 int Metadata::addFloat(uint32_t tag, int count, const float *data)
84 {
85 if (!validate(tag, TYPE_FLOAT, count)) return -EINVAL;
86 return add(tag, count, data);
87 }
88
addInt64(uint32_t tag,int count,const int64_t * data)89 int Metadata::addInt64(uint32_t tag, int count, const int64_t *data)
90 {
91 if (!validate(tag, TYPE_INT64, count)) return -EINVAL;
92 return add(tag, count, data);
93 }
94
addDouble(uint32_t tag,int count,const double * data)95 int Metadata::addDouble(uint32_t tag, int count, const double *data)
96 {
97 if (!validate(tag, TYPE_DOUBLE, count)) return -EINVAL;
98 return add(tag, count, data);
99 }
100
addRational(uint32_t tag,int count,const camera_metadata_rational_t * data)101 int Metadata::addRational(uint32_t tag, int count,
102 const camera_metadata_rational_t *data)
103 {
104 if (!validate(tag, TYPE_RATIONAL, count)) return -EINVAL;
105 return add(tag, count, data);
106 }
107
validate(uint32_t tag,int tag_type,int count)108 bool Metadata::validate(uint32_t tag, int tag_type, int count)
109 {
110 if (get_camera_metadata_tag_type(tag) < 0) {
111 ALOGE("%s: Invalid metadata entry tag: %d", __func__, tag);
112 return false;
113 }
114 if (tag_type < 0 || tag_type >= NUM_TYPES) {
115 ALOGE("%s: Invalid metadata entry tag type: %d", __func__, tag_type);
116 return false;
117 }
118 if (tag_type != get_camera_metadata_tag_type(tag)) {
119 ALOGE("%s: Tag %d called with incorrect type: %s(%d)", __func__, tag,
120 camera_metadata_type_names[tag_type], tag_type);
121 return false;
122 }
123 if (count < 1) {
124 ALOGE("%s: Invalid metadata entry count: %d", __func__, count);
125 return false;
126 }
127 return true;
128 }
129
add(uint32_t tag,int count,const void * tag_data)130 int Metadata::add(uint32_t tag, int count, const void *tag_data)
131 {
132 int res;
133 camera_metadata_t* tmp;
134 int tag_type = get_camera_metadata_tag_type(tag);
135 size_t size = calculate_camera_metadata_entry_data_size(tag_type, count);
136 size_t entry_capacity = get_camera_metadata_entry_count(mData) + 1;
137 size_t data_capacity = get_camera_metadata_data_count(mData) + size;
138
139 // Opportunistically attempt to add if metadata has room for it
140 if (!add_camera_metadata_entry(mData, tag, tag_data, count))
141 return 0;
142
143 // Double new dimensions to minimize future reallocations
144 tmp = allocate_camera_metadata(entry_capacity * 2, data_capacity * 2);
145 if (tmp == NULL) {
146 ALOGE("%s: Failed to allocate new metadata with %zu entries, %zu data",
147 __func__, entry_capacity, data_capacity);
148 return -ENOMEM;
149 }
150 // Append the current metadata to the new (empty) metadata
151 res = append_camera_metadata(tmp, mData);
152 if (res) {
153 ALOGE("%s: Failed to append old metadata %p to new %p",
154 __func__, mData, tmp);
155 return res;
156 }
157 // Add the remaining new item
158 res = add_camera_metadata_entry(tmp, tag, tag_data, count);
159 if (res) {
160 ALOGE("%s: Failed to add new entry (%d, %p, %d) to metadata %p",
161 __func__, tag, tag_data, count, tmp);
162 return res;
163 }
164
165 replace(tmp);
166 return 0;
167 }
168
get()169 camera_metadata_t* Metadata::get()
170 {
171 return mData;
172 }
173
174 } // namespace default_camera_hal
175