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
31namespace usb_camera_hal {
32
33Metadata::Metadata():
34    mData(NULL) {
35}
36
37Metadata::~Metadata() {
38    replace(NULL);
39}
40
41void 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
50int 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
64int 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
69int Metadata::add1UInt8(uint32_t tag, const uint8_t data) {
70    return addUInt8(tag, 1, &data);
71}
72
73int 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
78int 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
83int 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
88int 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
93int 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
99bool 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
120int 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
159camera_metadata_t* Metadata::get() {
160    return mData;
161}
162
163} // namespace usb_camera_hal
164