140 lines
4.9 KiB
C++
140 lines
4.9 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _ACAMERA_METADATA_H
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#define _ACAMERA_METADATA_H
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#include <unordered_set>
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#include <vector>
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#include <memory>
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#include <sys/types.h>
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#include <utils/Mutex.h>
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#include <utils/RefBase.h>
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#include <utils/Vector.h>
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#ifdef __ANDROID_VNDK__
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#include <CameraMetadata.h>
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using CameraMetadata = android::hardware::camera::common::V1_0::helper::CameraMetadata;
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#else
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#include <camera/CameraMetadata.h>
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#endif
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#include <camera/NdkCameraMetadata.h>
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using namespace android;
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/**
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* ACameraMetadata is an opaque struct definition.
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* It is intentionally left outside of the android namespace because it's NDK struct.
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*/
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struct ACameraMetadata : public RefBase {
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public:
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typedef enum {
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ACM_CHARACTERISTICS, // Read only
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ACM_REQUEST, // Read/Write
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ACM_RESULT, // Read only
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} ACAMERA_METADATA_TYPE;
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// Constructs a ACameraMetadata that takes ownership of `buffer`.
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ACameraMetadata(camera_metadata_t* buffer, ACAMERA_METADATA_TYPE type);
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// Constructs a ACameraMetadata that shares its data with something else, like a Java object
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ACameraMetadata(const std::shared_ptr<CameraMetadata>& cameraMetadata,
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ACAMERA_METADATA_TYPE type);
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// Copy constructor.
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//
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// Always makes a deep copy.
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ACameraMetadata(const ACameraMetadata& other);
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~ACameraMetadata();
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camera_status_t getConstEntry(uint32_t tag, ACameraMetadata_const_entry* entry) const;
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camera_status_t update(uint32_t tag, uint32_t count, const uint8_t* data);
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camera_status_t update(uint32_t tag, uint32_t count, const int32_t* data);
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camera_status_t update(uint32_t tag, uint32_t count, const float* data);
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camera_status_t update(uint32_t tag, uint32_t count, const double* data);
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camera_status_t update(uint32_t tag, uint32_t count, const int64_t* data);
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camera_status_t update(uint32_t tag, uint32_t count, const ACameraMetadata_rational* data);
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camera_status_t getTags(/*out*/int32_t* numTags,
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/*out*/const uint32_t** tags) const;
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const CameraMetadata& getInternalData() const;
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bool isLogicalMultiCamera(size_t* count, const char* const** physicalCameraIds) const;
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private:
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// Common code called by constructors.
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void init();
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// This function does not check whether the capability passed to it is valid.
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// The caller must make sure that it is.
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bool isNdkSupportedCapability(const int32_t capability);
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static inline bool isVendorTag(const uint32_t tag);
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static bool isCaptureRequestTag(const uint32_t tag);
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void filterUnsupportedFeatures(); // Hide features not yet supported by NDK
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void filterStreamConfigurations(); // Hide input streams, translate hal format to NDK formats
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void filterDurations(uint32_t tag); // translate hal format to NDK formats
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void derivePhysicalCameraIds(); // Derive array of physical ids.
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template<typename INTERNAL_T, typename NDK_T>
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camera_status_t updateImpl(uint32_t tag, uint32_t count, const NDK_T* data) {
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if (mType != ACM_REQUEST) {
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ALOGE("Error: Write to metadata is only allowed for capture request!");
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return ACAMERA_ERROR_INVALID_PARAMETER;
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}
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if (!isCaptureRequestTag(tag)) {
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ALOGE("Error: tag %d is not writable!", tag);
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return ACAMERA_ERROR_INVALID_PARAMETER;
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}
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Mutex::Autolock _l(mLock);
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status_t ret = OK;
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if (count == 0 && data == nullptr) {
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ret = mData->erase(tag);
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} else {
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// Here we have to use reinterpret_cast because the NDK data type is
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// exact copy of internal data type but they do not inherit from each other
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ret = mData->update(tag, reinterpret_cast<const INTERNAL_T*>(data), count);
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}
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if (ret == OK) {
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mTags.clear();
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return ACAMERA_OK;
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} else {
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return ACAMERA_ERROR_INVALID_PARAMETER;
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}
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}
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// Guard access of public APIs: get/update/getTags.
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mutable Mutex mLock;
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std::shared_ptr<CameraMetadata> mData;
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mutable Vector<uint32_t> mTags; // Updated by `getTags()`, cleared by `update()`.
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const ACAMERA_METADATA_TYPE mType;
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static std::unordered_set<uint32_t> sSystemTags;
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std::vector<const char*> mStaticPhysicalCameraIds;
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std::vector<String8> mStaticPhysicalCameraIdValues;
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};
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#endif // _ACAMERA_METADATA_H
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