diff options
Diffstat (limited to 'modules/usbcamera/Metadata.cpp')
-rw-r--r-- | modules/usbcamera/Metadata.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/modules/usbcamera/Metadata.cpp b/modules/usbcamera/Metadata.cpp new file mode 100644 index 0000000..f243834 --- /dev/null +++ b/modules/usbcamera/Metadata.cpp @@ -0,0 +1,160 @@ +/* + * Copyright (C) 2015 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +//#define LOG_NDEBUG 0 +#define LOG_TAG "Metadata" +#include <cutils/log.h> + +#include <system/camera_metadata.h> + +#define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL) +#include <utils/Trace.h> + +#include "Metadata.h" + +namespace usb_camera_hal { + +Metadata::Metadata(): + mData(NULL) { +} + +Metadata::~Metadata() { + replace(NULL); +} + +void Metadata::replace(camera_metadata_t *m) { + if (m == mData) { + return; + } + if (mData) + free_camera_metadata(mData); + mData = m; +} + +int Metadata::init(const camera_metadata_t *metadata) { + camera_metadata_t* tmp; + + if (!validate_camera_metadata_structure(metadata, NULL)) + return -EINVAL; + + tmp = clone_camera_metadata(metadata); + if (tmp == NULL) + return -EINVAL; + + replace(tmp); + return 0; +} + +int Metadata::addUInt8(uint32_t tag, int count, const uint8_t *data) { + if (!validate(tag, TYPE_BYTE, count)) return -EINVAL; + return add(tag, count, data); +} + +int Metadata::add1UInt8(uint32_t tag, const uint8_t data) { + return addUInt8(tag, 1, &data); +} + +int Metadata::addInt32(uint32_t tag, int count, const int32_t *data) { + if (!validate(tag, TYPE_INT32, count)) return -EINVAL; + return add(tag, count, data); +} + +int Metadata::addFloat(uint32_t tag, int count, const float *data) { + if (!validate(tag, TYPE_FLOAT, count)) return -EINVAL; + return add(tag, count, data); +} + +int Metadata::addInt64(uint32_t tag, int count, const int64_t *data) { + if (!validate(tag, TYPE_INT64, count)) return -EINVAL; + return add(tag, count, data); +} + +int Metadata::addDouble(uint32_t tag, int count, const double *data) { + if (!validate(tag, TYPE_DOUBLE, count)) return -EINVAL; + return add(tag, count, data); +} + +int Metadata::addRational(uint32_t tag, int count, + const camera_metadata_rational_t *data) { + if (!validate(tag, TYPE_RATIONAL, count)) return -EINVAL; + return add(tag, count, data); +} + +bool Metadata::validate(uint32_t tag, int tag_type, int count) { + if (get_camera_metadata_tag_type(tag) < 0) { + ALOGE("%s: Invalid metadata entry tag: %d", __func__, tag); + return false; + } + if (tag_type < 0 || tag_type >= NUM_TYPES) { + ALOGE("%s: Invalid metadata entry tag type: %d", __func__, tag_type); + return false; + } + if (tag_type != get_camera_metadata_tag_type(tag)) { + ALOGE("%s: Tag %d called with incorrect type: %s(%d)", __func__, tag, + camera_metadata_type_names[tag_type], tag_type); + return false; + } + if (count < 1) { + ALOGE("%s: Invalid metadata entry count: %d", __func__, count); + return false; + } + return true; +} + +int Metadata::add(uint32_t tag, int count, const void *tag_data) { + // Opportunistically attempt to add if metadata has room for it + if (!add_camera_metadata_entry(mData, tag, tag_data, count)) { + return 0; + } + + int res; + camera_metadata_t* tmp; + int tag_type = get_camera_metadata_tag_type(tag); + size_t size = calculate_camera_metadata_entry_data_size(tag_type, count); + size_t entry_capacity = get_camera_metadata_entry_count(mData) + 1; + size_t data_capacity = get_camera_metadata_data_count(mData) + size; + + // Double new dimensions to minimize future reallocations + tmp = allocate_camera_metadata(entry_capacity * 2, data_capacity * 2); + if (tmp == NULL) { + ALOGE("%s: Failed to allocate new metadata with %zu entries, %zu data", + __func__, entry_capacity, data_capacity); + return -ENOMEM; + } + // Append the current metadata to the new (empty) metadata + res = append_camera_metadata(tmp, mData); + if (res) { + ALOGE("%s: Failed to append old metadata %p to new %p", + __func__, mData, tmp); + return res; + } + // Add the remaining new item + res = add_camera_metadata_entry(tmp, tag, tag_data, count); + if (res) { + ALOGE("%s: Failed to add new entry (%d, %p, %d) to metadata %p", + __func__, tag, tag_data, count, tmp); + return res; + } + + replace(tmp); + return 0; +} + +camera_metadata_t* Metadata::get() { + return mData; +} + +} // namespace usb_camera_hal |