1 /*
2 * Copyright (C) 2015 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 //#define LOG_NDEBUG 0
18 #define LOG_TAG "Metadata"
19
20 #include <errno.h>
21
22 #include <log/log.h>
23
24 #define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
25 #include <utils/Trace.h>
26
27 #include <system/camera_metadata.h>
28
29 #include "Metadata.h"
30
31 namespace usb_camera_hal {
32
Metadata()33 Metadata::Metadata():
34 mData(NULL) {
35 }
36
~Metadata()37 Metadata::~Metadata() {
38 replace(NULL);
39 }
40
replace(camera_metadata_t * m)41 void Metadata::replace(camera_metadata_t *m) {
42 if (m == mData) {
43 return;
44 }
45 if (mData)
46 free_camera_metadata(mData);
47 mData = m;
48 }
49
init(const camera_metadata_t * metadata)50 int Metadata::init(const camera_metadata_t *metadata) {
51 camera_metadata_t* tmp;
52
53 if (!validate_camera_metadata_structure(metadata, NULL))
54 return -EINVAL;
55
56 tmp = clone_camera_metadata(metadata);
57 if (tmp == NULL)
58 return -EINVAL;
59
60 replace(tmp);
61 return 0;
62 }
63
addUInt8(uint32_t tag,int count,const uint8_t * data)64 int Metadata::addUInt8(uint32_t tag, int count, const uint8_t *data) {
65 if (!validate(tag, TYPE_BYTE, count)) return -EINVAL;
66 return add(tag, count, data);
67 }
68
add1UInt8(uint32_t tag,const uint8_t data)69 int Metadata::add1UInt8(uint32_t tag, const uint8_t data) {
70 return addUInt8(tag, 1, &data);
71 }
72
addInt32(uint32_t tag,int count,const int32_t * data)73 int Metadata::addInt32(uint32_t tag, int count, const int32_t *data) {
74 if (!validate(tag, TYPE_INT32, count)) return -EINVAL;
75 return add(tag, count, data);
76 }
77
addFloat(uint32_t tag,int count,const float * data)78 int Metadata::addFloat(uint32_t tag, int count, const float *data) {
79 if (!validate(tag, TYPE_FLOAT, count)) return -EINVAL;
80 return add(tag, count, data);
81 }
82
addInt64(uint32_t tag,int count,const int64_t * data)83 int Metadata::addInt64(uint32_t tag, int count, const int64_t *data) {
84 if (!validate(tag, TYPE_INT64, count)) return -EINVAL;
85 return add(tag, count, data);
86 }
87
addDouble(uint32_t tag,int count,const double * data)88 int Metadata::addDouble(uint32_t tag, int count, const double *data) {
89 if (!validate(tag, TYPE_DOUBLE, count)) return -EINVAL;
90 return add(tag, count, data);
91 }
92
addRational(uint32_t tag,int count,const camera_metadata_rational_t * data)93 int Metadata::addRational(uint32_t tag, int count,
94 const camera_metadata_rational_t *data) {
95 if (!validate(tag, TYPE_RATIONAL, count)) return -EINVAL;
96 return add(tag, count, data);
97 }
98
validate(uint32_t tag,int tag_type,int count)99 bool Metadata::validate(uint32_t tag, int tag_type, int count) {
100 if (get_camera_metadata_tag_type(tag) < 0) {
101 ALOGE("%s: Invalid metadata entry tag: %d", __func__, tag);
102 return false;
103 }
104 if (tag_type < 0 || tag_type >= NUM_TYPES) {
105 ALOGE("%s: Invalid metadata entry tag type: %d", __func__, tag_type);
106 return false;
107 }
108 if (tag_type != get_camera_metadata_tag_type(tag)) {
109 ALOGE("%s: Tag %d called with incorrect type: %s(%d)", __func__, tag,
110 camera_metadata_type_names[tag_type], tag_type);
111 return false;
112 }
113 if (count < 1) {
114 ALOGE("%s: Invalid metadata entry count: %d", __func__, count);
115 return false;
116 }
117 return true;
118 }
119
add(uint32_t tag,int count,const void * tag_data)120 int Metadata::add(uint32_t tag, int count, const void *tag_data) {
121 // Opportunistically attempt to add if metadata has room for it
122 if (!add_camera_metadata_entry(mData, tag, tag_data, count)) {
123 return 0;
124 }
125
126 int res;
127 camera_metadata_t* tmp;
128 int tag_type = get_camera_metadata_tag_type(tag);
129 size_t size = calculate_camera_metadata_entry_data_size(tag_type, count);
130 size_t entry_capacity = get_camera_metadata_entry_count(mData) + 1;
131 size_t data_capacity = get_camera_metadata_data_count(mData) + size;
132
133 // Double new dimensions to minimize future reallocations
134 tmp = allocate_camera_metadata(entry_capacity * 2, data_capacity * 2);
135 if (tmp == NULL) {
136 ALOGE("%s: Failed to allocate new metadata with %zu entries, %zu data",
137 __func__, entry_capacity, data_capacity);
138 return -ENOMEM;
139 }
140 // Append the current metadata to the new (empty) metadata
141 res = append_camera_metadata(tmp, mData);
142 if (res) {
143 ALOGE("%s: Failed to append old metadata %p to new %p",
144 __func__, mData, tmp);
145 return res;
146 }
147 // Add the remaining new item
148 res = add_camera_metadata_entry(tmp, tag, tag_data, count);
149 if (res) {
150 ALOGE("%s: Failed to add new entry (%d, %p, %d) to metadata %p",
151 __func__, tag, tag_data, count, tmp);
152 return res;
153 }
154
155 replace(tmp);
156 return 0;
157 }
158
get()159 camera_metadata_t* Metadata::get() {
160 return mData;
161 }
162
163 } // namespace usb_camera_hal
164