From 7efa520c76e6a1f6b3146404cc6aca5a8353583a Mon Sep 17 00:00:00 2001 From: Igor Murashkin Date: Wed, 13 Feb 2013 15:53:56 -0800 Subject: Camera: Move CameraMetadata.h from service to client library Change-Id: I940ce86f318f37ae5b73f912a6e589415150125f --- include/camera/CameraMetadata.h | 171 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 171 insertions(+) create mode 100644 include/camera/CameraMetadata.h (limited to 'include/camera') diff --git a/include/camera/CameraMetadata.h b/include/camera/CameraMetadata.h new file mode 100644 index 0000000..cf599e1 --- /dev/null +++ b/include/camera/CameraMetadata.h @@ -0,0 +1,171 @@ +/* + * Copyright (C) 2012 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. + */ + +#ifndef ANDROID_CLIENT_CAMERA2_CAMERAMETADATA_CPP +#define ANDROID_CLIENT_CAMERA2_CAMERAMETADATA_CPP + +#include "system/camera_metadata.h" +#include +#include + +namespace android { + +/** + * A convenience wrapper around the C-based camera_metadata_t library. + */ +class CameraMetadata { + public: + /** Creates an empty object; best used when expecting to acquire contents + * from elsewhere */ + CameraMetadata(); + /** Creates an object with space for entryCapacity entries, with + * dataCapacity extra storage */ + CameraMetadata(size_t entryCapacity, size_t dataCapacity = 10); + + ~CameraMetadata(); + + /** Takes ownership of passed-in buffer */ + CameraMetadata(camera_metadata_t *buffer); + /** Clones the metadata */ + CameraMetadata(const CameraMetadata &other); + + /** + * Assignment clones metadata buffer. + */ + CameraMetadata &operator=(const CameraMetadata &other); + CameraMetadata &operator=(const camera_metadata_t *buffer); + + /** + * Release a raw metadata buffer to the caller. After this call, + * CameraMetadata no longer references the buffer, and the caller takes + * responsibility for freeing the raw metadata buffer (using + * free_camera_metadata()), or for handing it to another CameraMetadata + * instance. + */ + camera_metadata_t* release(); + + /** + * Clear the metadata buffer and free all storage used by it + */ + void clear(); + + /** + * Acquire a raw metadata buffer from the caller. After this call, + * the caller no longer owns the raw buffer, and must not free or manipulate it. + * If CameraMetadata already contains metadata, it is freed. + */ + void acquire(camera_metadata_t* buffer); + + /** + * Acquires raw buffer from other CameraMetadata object. After the call, the argument + * object no longer has any metadata. + */ + void acquire(CameraMetadata &other); + + /** + * Append metadata from another CameraMetadata object. + */ + status_t append(const CameraMetadata &other); + + /** + * Number of metadata entries. + */ + size_t entryCount() const; + + /** + * Is the buffer empty (no entires) + */ + bool isEmpty() const; + + /** + * Sort metadata buffer for faster find + */ + status_t sort(); + + /** + * Update metadata entry. Will create entry if it doesn't exist already, and + * will reallocate the buffer if insufficient space exists. Overloaded for + * the various types of valid data. + */ + status_t update(uint32_t tag, + const uint8_t *data, size_t data_count); + status_t update(uint32_t tag, + const int32_t *data, size_t data_count); + status_t update(uint32_t tag, + const float *data, size_t data_count); + status_t update(uint32_t tag, + const int64_t *data, size_t data_count); + status_t update(uint32_t tag, + const double *data, size_t data_count); + status_t update(uint32_t tag, + const camera_metadata_rational_t *data, size_t data_count); + status_t update(uint32_t tag, + const String8 &string); + + template + status_t update(uint32_t tag, Vector data) { + return update(tag, data.array(), data.size()); + } + + /** + * Get metadata entry by tag id + */ + camera_metadata_entry find(uint32_t tag); + + /** + * Get metadata entry by tag id, with no editing + */ + camera_metadata_ro_entry find(uint32_t tag) const; + + /** + * Delete metadata entry by tag + */ + status_t erase(uint32_t tag); + + /** + * Dump contents into FD for debugging. The verbosity levels are + * 0: Tag entry information only, no data values + * 1: Level 0 plus at most 16 data values per entry + * 2: All information + * + * The indentation parameter sets the number of spaces to add to the start + * each line of output. + */ + void dump(int fd, int verbosity = 1, int indentation = 0) const; + + private: + camera_metadata_t *mBuffer; + + /** + * Check if tag has a given type + */ + status_t checkType(uint32_t tag, uint8_t expectedType); + + /** + * Base update entry method + */ + status_t update(uint32_t tag, const void *data, size_t data_count); + + /** + * Resize metadata buffer if needed by reallocating it and copying it over. + */ + status_t resizeIfNeeded(size_t extraEntries, size_t extraData); + +}; + +}; // namespace android + +#endif -- cgit v1.1