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