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