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140 lines
4.2 KiB
C++
140 lines
4.2 KiB
C++
/*
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* Copyright (C) 2017 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 CAMERA_NATIVE_CAMERA_H
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#define CAMERA_NATIVE_CAMERA_H
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#include <camera/NdkCameraDevice.h>
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#include <camera/NdkCameraError.h>
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#include <camera/NdkCameraManager.h>
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#include <camera/NdkCameraMetadataTags.h>
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#include <map>
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#include <string>
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#include <vector>
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#include "image_reader.h"
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enum class CaptureSessionState : int32_t {
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READY = 0, // session is ready
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ACTIVE, // session is busy
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CLOSED, // session is closed(by itself or a new session evicts)
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MAX_STATE
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};
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template <typename T>
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class RangeValue {
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public:
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T min_, max_;
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/**
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* return absolute value from relative value
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* value: in percent (50 for 50%)
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*/
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T value(int percent) {
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return static_cast<T>(min_ + (max_ - min_) * percent / 100);
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}
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RangeValue() { min_ = max_ = static_cast<T>(0); }
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bool Supported(void) const { return (min_ != max_); }
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};
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enum PREVIEW_INDICES {
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PREVIEW_REQUEST_IDX = 0,
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JPG_CAPTURE_REQUEST_IDX,
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CAPTURE_REQUEST_COUNT,
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};
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struct CaptureRequestInfo {
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ANativeWindow* outputNativeWindow_;
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ACaptureSessionOutput* sessionOutput_;
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ACameraOutputTarget* target_;
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ACaptureRequest* request_;
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ACameraDevice_request_template template_;
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int sessionSequenceId_;
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};
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class CameraId;
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class NDKCamera {
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private:
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ACameraManager* cameraMgr_;
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std::map<std::string, CameraId> cameras_;
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std::string activeCameraId_;
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uint32_t cameraFacing_;
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uint32_t cameraOrientation_;
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std::vector<CaptureRequestInfo> requests_;
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ACaptureSessionOutputContainer* outputContainer_;
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ACameraCaptureSession* captureSession_;
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CaptureSessionState captureSessionState_;
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// set up exposure control
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int64_t exposureTime_;
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RangeValue<int64_t> exposureRange_;
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int32_t sensitivity_;
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RangeValue<int32_t> sensitivityRange_;
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volatile bool valid_;
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ACameraManager_AvailabilityCallbacks* GetManagerListener();
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ACameraDevice_stateCallbacks* GetDeviceListener();
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ACameraCaptureSession_stateCallbacks* GetSessionListener();
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ACameraCaptureSession_captureCallbacks* GetCaptureCallback();
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public:
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NDKCamera();
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~NDKCamera();
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void EnumerateCamera(void);
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bool MatchCaptureSizeRequest(ANativeWindow* display, ImageFormat* view,
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ImageFormat* capture);
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void CreateSession(ANativeWindow* previewWindow, ANativeWindow* jpgWindow,
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int32_t imageRotation);
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bool GetSensorOrientation(int32_t* facing, int32_t* angle);
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void OnCameraStatusChanged(const char* id, bool available);
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void OnDeviceState(ACameraDevice* dev);
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void OnDeviceError(ACameraDevice* dev, int err);
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void OnSessionState(ACameraCaptureSession* ses, CaptureSessionState state);
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void OnCaptureSequenceEnd(ACameraCaptureSession* session, int sequenceId,
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int64_t frameNumber);
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void OnCaptureFailed(ACameraCaptureSession* session, ACaptureRequest* request,
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ACameraCaptureFailure* failure);
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void StartPreview(bool start);
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bool TakePhoto(void);
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bool GetExposureRange(int64_t* min, int64_t* max, int64_t* curVal);
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bool GetSensitivityRange(int64_t* min, int64_t* max, int64_t* curVal);
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void UpdateCameraRequestParameter(int32_t code, int64_t val);
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};
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// helper classes to hold enumerated camera
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class CameraId {
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public:
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ACameraDevice* device_;
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std::string id_;
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acamera_metadata_enum_android_lens_facing_t facing_;
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bool available_; // free to use ( no other apps are using
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bool owner_; // we are the owner of the camera
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explicit CameraId(const char* id)
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: device_(nullptr),
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facing_(ACAMERA_LENS_FACING_FRONT),
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available_(false),
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owner_(false) {
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id_ = id;
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}
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explicit CameraId(void) { CameraId(""); }
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};
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#endif // CAMERA_NATIVE_CAMERA_H
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