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 30 namespace default_camera_hal { 31 32 Metadata::Metadata(): 33 mData(NULL) 34 { 35 } 36 37 Metadata::~Metadata() 38 { 39 replace(NULL); 40 } 41 42 void 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 53 int 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 68 int 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 74 int Metadata::add1UInt8(uint32_t tag, const uint8_t data) 75 { 76 return addUInt8(tag, 1, &data); 77 } 78 79 int 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 85 int 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 91 int 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 97 int 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 } 102 103 int 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 } 109 110 bool 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 } 131 132 int 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 } 179 180 camera_metadata_t* Metadata::get() 181 { 182 return mData; 183 } 184 185 } // namespace default_camera_hal 186
