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/*
* Copyright (C) 2013 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 METADATA_H_
#define METADATA_H_
#include <hardware/camera3.h>
#include <hardware/gralloc.h>
#include <system/camera_metadata.h>
#include <system/graphics.h>
namespace default_camera_hal {
// Metadata is a convenience class for dealing with libcamera_metadata
class Metadata {
public:
Metadata();
~Metadata();
// Constructor used for request metadata templates
Metadata(uint8_t mode, uint8_t intent);
// Parse and add an entry
int addUInt8(uint32_t tag, int count, uint8_t *data);
int addInt32(uint32_t tag, int count, int32_t *data);
int addFloat(uint32_t tag, int count, float *data);
int addInt64(uint32_t tag, int count, int64_t *data);
int addDouble(uint32_t tag, int count, double *data);
int addRational(uint32_t tag, int count,
camera_metadata_rational_t *data);
// Generate a camera_metadata structure and fill it with internal data
camera_metadata_t *generate();
private:
// Validate the tag, type and count for a metadata entry
bool validate(uint32_t tag, int tag_type, int count);
// Add a verified tag with data to this Metadata structure
int add(uint32_t tag, int count, void *tag_data);
class Entry {
public:
Entry(uint32_t tag, void *data, int count);
~Entry();
Entry *mNext;
Entry *mPrev;
const uint32_t mTag;
const void *mData;
const int mCount;
void insertAfter(Entry *e);
};
// List ends
Entry *mHead;
Entry *mTail;
// Append entry to list
void push(Entry *e);
// Total of entries and entry data size
int mEntryCount;
int mDataCount;
// Save generated metadata, invalidated on update
camera_metadata_t *mGenerated;
// Flag to force metadata regeneration
bool mDirty;
// Lock protecting the Metadata object for modifications
pthread_mutex_t mMutex;
};
} // namespace default_camera_hal
#endif // METADATA_H_
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