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/*
* Copyright 2019 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.
*/
package androidx.camera.extensions.impl;
import android.content.Context;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraDevice;
import android.hardware.camera2.CaptureRequest;
/**
* Provides interfaces that the OEM needs to implement to handle the state change.
*
* @since 1.0
* @hide
*/
public interface ExtenderStateListener {
/**
* Notify to initialize the extension. This will be called after bindToLifeCycle. This is
* where the use case is started and would be able to allocate resources here. After onInit() is
* called, the camera ID, cameraCharacteristics and context will not change until onDeInit()
* has been called.
*
* @param cameraId The camera2 id string of the camera.
* @param cameraCharacteristics The {@link CameraCharacteristics} of the camera.
* @param context The {@link Context} used for CameraX.
* @hide
*/
void onInit(String cameraId, CameraCharacteristics cameraCharacteristics, Context context);
/**
* Notify to de-initialize the extension. This callback will be invoked after unbind.
* After onDeInit() was called, it is expected that the camera ID, cameraCharacteristics will
* no longer hold, this should be where to clear all resources allocated for this use case.
* @hide
*/
void onDeInit();
/**
* This will be invoked before creating a
* {@link android.hardware.camera2.CameraCaptureSession}. The {@link CaptureRequest}
* parameters returned via {@link CaptureStageImpl} will be passed to the camera device as
* part of the capture session initialization via setSessionParameters(). The valid parameter
* is a subset of the available capture request parameters.
*
* @return The request information to set the session wide camera parameters.
* @hide
*/
CaptureStageImpl onPresetSession();
/**
* This will be invoked once after the {@link android.hardware.camera2.CameraCaptureSession}
* has been created. The {@link CaptureRequest} parameters returned via
* {@link CaptureStageImpl} will be used to generate a single request to the current
* configured {@link CameraDevice}. The generated request will be submitted to camera before
* processing other single requests.
*
* @return The request information to create a single capture request to camera device.
* @hide
*/
CaptureStageImpl onEnableSession();
/**
* This will be invoked before the {@link android.hardware.camera2.CameraCaptureSession} is
* closed. The {@link CaptureRequest} parameters returned via {@link CaptureStageImpl} will
* be used to generate a single request to the currently configured {@link CameraDevice}. The
* generated request will be submitted to camera before the CameraCaptureSession is closed.
*
* @return The request information to customize the session.
* @hide
*/
CaptureStageImpl onDisableSession();
}
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