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//#define LOG_NDEBUG 0
17#define LOG_TAG "Metadata"
18
19#include <errno.h>
20
21#include <system/camera_metadata.h>
22
23#include <log/log.h>
24
25#define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
26#include <utils/Trace.h>
27
28#include "Metadata.h"
29
30namespace default_camera_hal {
31
32Metadata::Metadata():
33    mData(NULL)
34{
35}
36
37Metadata::~Metadata()
38{
39    replace(NULL);
40}
41
42void Metadata::replace(camera_metadata_t *m)
43{
44    if (m == mData) {
45        ALOGE("%s: Replacing metadata with itself?!", __func__);
46        return;
47    }
48    if (mData)
49        free_camera_metadata(mData);
50    mData = m;
51}
52
53int Metadata::init(const camera_metadata_t *metadata)
54{
55    camera_metadata_t* tmp;
56
57    if (validate_camera_metadata_structure(metadata, NULL))
58        return -EINVAL;
59
60    tmp = clone_camera_metadata(metadata);
61    if (tmp == NULL)
62        return -EINVAL;
63
64    replace(tmp);
65    return 0;
66}
67
68int Metadata::addUInt8(uint32_t tag, int count, const uint8_t *data)
69{
70    if (!validate(tag, TYPE_BYTE, count)) return -EINVAL;
71    return add(tag, count, data);
72}
73
74int Metadata::add1UInt8(uint32_t tag, const uint8_t data)
75{
76    return addUInt8(tag, 1, &data);
77}
78
79int Metadata::addInt32(uint32_t tag, int count, const int32_t *data)
80{
81    if (!validate(tag, TYPE_INT32, count)) return -EINVAL;
82    return add(tag, count, data);
83}
84
85int Metadata::addFloat(uint32_t tag, int count, const float *data)
86{
87    if (!validate(tag, TYPE_FLOAT, count)) return -EINVAL;
88    return add(tag, count, data);
89}
90
91int Metadata::addInt64(uint32_t tag, int count, const int64_t *data)
92{
93    if (!validate(tag, TYPE_INT64, count)) return -EINVAL;
94    return add(tag, count, data);
95}
96
97int Metadata::addDouble(uint32_t tag, int count, const double *data)
98{
99    if (!validate(tag, TYPE_DOUBLE, count)) return -EINVAL;
100    return add(tag, count, data);
101}
102
103int Metadata::addRational(uint32_t tag, int count,
104        const camera_metadata_rational_t *data)
105{
106    if (!validate(tag, TYPE_RATIONAL, count)) return -EINVAL;
107    return add(tag, count, data);
108}
109
110bool Metadata::validate(uint32_t tag, int tag_type, int count)
111{
112    if (get_camera_metadata_tag_type(tag) < 0) {
113        ALOGE("%s: Invalid metadata entry tag: %d", __func__, tag);
114        return false;
115    }
116    if (tag_type < 0 || tag_type >= NUM_TYPES) {
117        ALOGE("%s: Invalid metadata entry tag type: %d", __func__, tag_type);
118        return false;
119    }
120    if (tag_type != get_camera_metadata_tag_type(tag)) {
121        ALOGE("%s: Tag %d called with incorrect type: %s(%d)", __func__, tag,
122                camera_metadata_type_names[tag_type], tag_type);
123        return false;
124    }
125    if (count < 1) {
126        ALOGE("%s: Invalid metadata entry count: %d", __func__, count);
127        return false;
128    }
129    return true;
130}
131
132int Metadata::add(uint32_t tag, int count, const void *tag_data)
133{
134    int res;
135    size_t entry_capacity = 0;
136    size_t data_capacity = 0;
137    camera_metadata_t* tmp;
138    int tag_type = get_camera_metadata_tag_type(tag);
139    size_t size = calculate_camera_metadata_entry_data_size(tag_type, count);
140
141    if (NULL == mData) {
142        entry_capacity = 1;
143        data_capacity = size;
144    } else {
145        entry_capacity = get_camera_metadata_entry_count(mData) + 1;
146        data_capacity = get_camera_metadata_data_count(mData) + size;
147    }
148
149    // Opportunistically attempt to add if metadata exists and has room for it
150    if (mData && !add_camera_metadata_entry(mData, tag, tag_data, count))
151        return 0;
152    // Double new dimensions to minimize future reallocations
153    tmp = allocate_camera_metadata(entry_capacity * 2, data_capacity * 2);
154    if (tmp == NULL) {
155        ALOGE("%s: Failed to allocate new metadata with %zu entries, %zu data",
156                __func__, entry_capacity, data_capacity);
157        return -ENOMEM;
158    }
159    // Append the current metadata to the new (empty) metadata, if any
160    if (NULL != mData) {
161      res = append_camera_metadata(tmp, mData);
162      if (res) {
163          ALOGE("%s: Failed to append old metadata %p to new %p",
164                  __func__, mData, tmp);
165          return res;
166      }
167    }
168    // Add the remaining new item to tmp and replace mData
169    res = add_camera_metadata_entry(tmp, tag, tag_data, count);
170    if (res) {
171        ALOGE("%s: Failed to add new entry (%d, %p, %d) to metadata %p",
172                __func__, tag, tag_data, count, tmp);
173        return res;
174    }
175    replace(tmp);
176
177    return 0;
178}
179
180camera_metadata_t* Metadata::get()
181{
182    return mData;
183}
184
185} // namespace default_camera_hal
186