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